Abstract

A method to produce olefins may include supplying a hydrocarbon feed to an outer tube of a thermal energy recovery assembly; heating the hydrocarbon feed in the outer tube of the thermal energy recovery assembly to output a preheated hydrocarbon feed; supplying the preheated hydrocarbon feed to an electrically powered cracking furnace comprising a reaction zone to heat the preheated hydrocarbon feed; cracking the preheated hydrocarbon feed in the reaction zone of the electrically heated cracking furnace using heat generated by electricity to output hot reactor effluent comprising cracked hydrocarbons and olefins; supplying the hot reactor effluent to an inner tube of the thermal energy recovery assembly; and cooling the hot reactor effluent in the inner tube of the thermal energy recovery assembly by transferring heat to the hydrocarbon feed.

IPC Classes  ?

• C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• C10G 9/24 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by heating with electrical means

Abstract

A method to produce olefins may include at least one cooling step in a thermal energy recovery by supplying a hydrocarbon feed to an outer tube of the thermal energy recovery assembly; heating the hydrocarbon feed in the outer tube of the thermal energy recovery assembly to output a preheated hydrocarbon feed; supplying the preheated hydrocarbon feed to an electrically powered cracking furnace comprising a reaction zone to heat the preheated hydrocarbon feed; cracking the preheated hydrocarbon feed in the reaction zone of the electrically heated cracking furnace using heat generated by electricity to output hot reactor effluent comprising cracked hydrocarbons and olefins; supplying the hot reactor effluent to an inner tube of the thermal energy recovery assembly; cooling the hot reactor effluent in the inner tube of the thermal energy recovery assembly by transferring heat to the hydrocarbon feed; and where the inner tube outside temperature in the thermal energy recovery assembly stays below 720°C and the inner tube inside temperature in the thermal energy recovery assembly remains above 180°C.

IPC Classes  ?

• C10G 9/24 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by heating with electrical means
• C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• C10G 15/08 - Cracking of hydrocarbon oils by electric means, electromagnetic or mechanical vibrations, by particle radiation or with gases superheated in electric arcs by electric means or by electromagnetic or mechanical vibrations
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28F 9/02 - Header boxesEnd plates

Abstract

A method for producing olefins proposed involves heating a reaction feed, operating a conversion reactor, converting the feed within this reactor, extracting a product gas, and then cooling this gas. The process utilizes a thermal energy recovery system equipped with coaxial inner and outer passages and structures to enhance heat transfer between them. The feed and product gas are passed through the outer and inner passages, respectively, to transfer heat efficiently. Additionally, the reactor is fired using preheated oxidator gas over 400 °C and fuel gas. The thermal system is designed to adhere to specific temperature constraints on the inner passage's containment, ensuring operational safety and efficiency. Corresponding is also disclosed herein.

IPC Classes  ?

• C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• C10G 9/36 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by direct contact with inert preheated fluids, e.g. with molten metals or salts with heated gases or vapours
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28D 7/00 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

Abstract

Heat exchanger (1) having a plurality of tubes (3) through which a first medium to be cooled can flow, wherein at least one section (3a) of the tubes (3) is surrounded by a space (5) in each case or sections (3a) of a plurality of the tubes (3) are arranged in a space (5) together, wherein a second heat-absorbing medium can flow through the space (5) or the spaces (5), and wherein the tubes (3) have a constant outside diameter at least in the section (3a), wherein the tubes each have an inside diameter that tapers in the direction of flow of the first medium at least in at least one subregion of the respective section.

IPC Classes  ?

• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28F 9/02 - Header boxesEnd plates
• F28F 9/16 - Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
• F28F 13/08 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
• F28F 19/00 - Preventing the formation of deposits or corrosion, e.g. by using filters

Abstract

A method to produce olefins may include supplying a hydrocarbon feed to an outer tube of a thermal energy recovery assembly; heating the hydrocarbon feed in the outer tube of the thermal energy recovery assembly to output a preheated hydrocarbon feed; supplying the preheated hydrocarbon feed to an electrically powered cracking furnace comprising a reaction zone to heat the preheated hydrocarbon feed; cracking the preheated hydrocarbon feed in the reaction zone of the electrically heated cracking furnace using heat generated by electricity to output hot reactor effluent comprising cracked hydrocarbons and olefins; supplying the hot reactor effluent to an inner tube of the thermal energy recovery assembly; and cooling the hot reactor effluent in the inner tube of the thermal energy recovery assembly by transferring heat to the hydrocarbon feed.

IPC Classes  ?

• C10G 9/24 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by heating with electrical means
• C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28F 9/02 - Header boxesEnd plates

Goods & Services

Heat exchangers [as part of machines and installations assembled therefrom] for recovering heat from processes of chemical, petrochemical, metallurgical industries or for recovery of heat in power plants; recuperators [as part of machines and installations assembled therefrom]; heat exchangers [as part of machines and installations assembled therefrom] for air or fuel preheating; reactors for use in the chemical industry. Industrial apparatus for industrial treatment installations; industrial apparatus for cooling and heating installations for the processing of chemical products; industrial apparatus for heat regenerators; industrial apparatus for chemical processing equipment; industrial apparatus for installations for the burning off of gases; industrial apparatus for installations for evaporating; industrial treatment installations; apparatus for vapor producing installations; heat regenerators; heat exchangers; heat transmitters; cooling and heating installations for the processing of chemical products; heat exchangers for removal of flue gases; flues and installations for conveying exhaust gases; air preheaters; fuel preheaters; gas/gas heaters for gas processing; thermal exhaust air purification plant; steam generating installations; driers for refrigeration systems; calcinating furnaces for industrial purposes; recuperators; heating boilers; machine for drying, heating, overheating, calcining and cooling industrial materials. Scientific and technological services; technical testing, authentication and quality control; engineering services; consultancy services, namely, science, technological, and engineering consultancy.

Goods & Services

Heat exchangers as part of machines and installations assembled therefrom for recovering heat from processes of chemical, petrochemical, metallurgical industries or for recovery of heat in power plants; recuperators as part of machines and installations assembled therefrom; heat exchangers as part of machines and installations assembled therefrom for air or fuel preheating; reactors for use in the chemical industry in the nature of bioreactors for the gasification of waste and biomass. Industrial heating apparatus for industrial treatment installations; industrial apparatus using air, gas or steam for cooling and heating installations for the processing of chemical products; industrial apparatus in the nature of heat regenerators; industrial apparatus in the nature of heat exchangers, not being part of machines, for chemical processing; industrial apparatus in the nature of chemical reactors, not being part of machines, for chemical processing; industrial apparatus for in the nature of heating installations for the burning off of gases; industrial apparatus for installations for evaporating in the nature of evaporators; industrial wastewater treatment installations in the nature of gasification apparatuses for gasification of wastewater; industrial apparatus in the nature of vapor generating installations; heat regenerators; heat exchangers, not being parts of machines; heat transmitters being heat generators; cooling and heating installations for the processing of chemical products; heat exchangers, not being parts of machines for removal of flue gases; flues and installations for conveying exhaust gases; air preheaters in the nature of air heaters; fuel preheaters in the nature of heating apparatus for liquid or gaseous fuel; gas and gas heaters for gas processing for heating gas for industrial proposes; thermal exhaust air purification plant in the nature of air purification apparatus; steam generating installations; driers for refrigeration systems being drying apparatus for use in refrigeration systems; calcinatory; furnaces for industrial purposes; recuperators for chemical processes; heating boilers; machine for drying, heating, overheating, calcining and cooling industrial materials in the nature of heat generators and installations for the burning off of gases. Science and technology services, namely, scientific research, analysis and testing in the field of cooling, heating and purification systems; technical testing, authentication and quality control for others in the field of cooling, heating and purification systems for industrial use; engineering services; consultancy services, namely, science, technical, and engineering consultancy in the field of cooling, heating and purification systems.

Goods & Services

Alarms; testing apparatus not for medical purposes; chemistry apparatus and instruments; data processing apparatus; data collection apparatus; detectors; diagnostic apparatus not for medical purposes; densimeters; pressure measuring apparatus; flowmeters; electric installations for the remote control of industrial operations; regulating apparatus, electric; measuring devices, electric; electronic notice boards; apparatus for analysing gases; infrared detectors; boiler control instruments; measuring apparatus and instruments; measuring devices; measuring sensors; apparatus and instruments for physics; temperature indicators; pressure indicator plugs for valves; heat regulating apparatus; all of the aforementioned goods for use in the field of measuring and control systems for industrial apparatus, particularly heat exchangers. Industrial heating apparatus for industrial treatment installations; cooling and heating installations for the processing of chemical products; industrial heat regenerators; industrial chemical processing equipment; industrial installations for burning off of gases; industrial installations for evaporating; industrial treatment installations; vapor producing installations; heat regenerators; heat recuperators; heat exchangers; cooling and heating installations for the processing of chemical products; heat exchangers for removal of flue gases. Science and technology services; engineering services; technical consultancy, namely advisory relating to science, technology and engineering; all of the aforementioned services for use in the field of data collection, data storage, data visualization with respect to industrial apparatus, particularly heat exchangers, and with respect to compilation of status reports and action recommendations for industrial apparatus, particularly heat exchangers.

Abstract

An industrial production plant including at least one reactor for producing a flue gas and including a heat exchanger system having a first heat exchanger section for heat exchange between the flue gas and a fluid and a second heat exchanger section for heat exchange between the flue gas and reaction air for the reactor, which can be preheated by the second heat exchanger section. The first heat exchanger section is configured as a double-tube heat exchanger with first tubes each arranged one-way in a respective first jacket tube, and the second heat exchanger section is configured as a tube bundle heat exchanger with a tube bundle of second tubes arranged in a second jacket tube and each arranged one-way in the jacket tube.

IPC Classes  ?

• B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
• C09C 1/50 - Furnace black
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
• F28D 7/00 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
• B01J 12/00 - Chemical processes in general for reacting gaseous media with gaseous mediaApparatus specially adapted therefor
• F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
• F28F 19/00 - Preventing the formation of deposits or corrosion, e.g. by using filters

Goods & Services

Alarm monitoring systems for detecting and signaling of the exceeding of thresholds of heat exchanger parameters; testing apparatus not for medical purposes, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors and detectors for use in industrial high temperature and high pressure processes; chemistry apparatus and instruments, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors, detectors and electric regulating modules for use in industrial high temperature and high pressure processes; data processing apparatus; data collection apparatus, namely, electronic databases in the field of heat transfer, temperature, pressure, mass flow and material thicknesses data for use in industrial high temperature and high pressure processes, recorded on computer media; heat detectors; diagnostic apparatus not for medical purposes, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors and detectors for use in industrial high temperature and high pressure processes; densimeters; pressure measuring apparatus; flowmeters; electric installations for the remote control of industrial operations; regulating apparatus, electric, namely, electric regulating modules for regulating heat transfer, temperature, pressure, mass flow and material thicknesses for use in industrial high temperature and high pressure processes; measuring devices, electric, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors and detectors for use in industrial high temperature and high pressure processes; electronic notice boards; apparatus for analyzing gases; infrared detectors; boiler control instruments; measuring apparatus and instruments, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors and detectors for use in industrial high temperature and high pressure processes; measuring devices, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors and detectors for use in industrial high temperature and high pressure processes; measuring sensors, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges and sensors for use in industrial high temperature and high pressure processes; apparatus and instruments for physics, namely, heat transfer, temperature, pressure, mass flow and material thicknesses gauges, sensors and detectors for use in industrial high temperature and high pressure processes; temperature indicators; pressure indicator plugs for valves; heat regulating apparatus, namely, heat transfer, temperature, pressure and mass flow regulators for use in industrial high temperature and high pressure processes; all of the aforementioned goods for use in the field of measuring and control systems for industrial apparatus, particularly heat exchangers Science and technology services, namely, scientific research, analysis and testing in the field of heat exchange; engineering services; technical consultancy, namely, advisory relating to science, technology and engineering; all of the aforementioned services for use in the field of data collection, data storage, data visualization with respect to industrial apparatus, particularly heat exchangers, and with respect to compilation of status reports and action recommendations for industrial apparatus, particularly heat exchangers

Abstract

A method for welding two or more conduits includes aligning end portions thereof in an abutting relationship to define a gap. The method includes performing a spatter free root weld along the gap to configure a root layer while the inner circumferential surface side is unobstructed. After the root weld is complete, an outward thrust is applied along the inner circumferential surfaces of the conduits. During the application of the outward thrust, a filler weld is performed along the gap to fill the gap and to facilitate shrinkage of the filler and root weld materials longitudinally and radially outward while preventing pressing out of the filler and root weld materials radially inward of the inner circumferential surface.

IPC Classes  ?

• B23K 9/02 - Seam weldingBacking meansInserts
• B23K 37/053 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical workClamping devices therefor
• B23K 9/028 - Seam weldingBacking meansInserts for curved planar seams
• B23K 9/035 - Seam weldingBacking meansInserts with backing means disposed under the seam
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding

Abstract

A heat exchanger having a first section, through which a first medium can flow, and a second section, through which a second medium can flow. During operation a heat exchange takes place between the first and the second medium. The first section has an inlet chamber and first tubes connected to the inlet chamber, and an outlet chamber and second tubes connected to the outlet chamber. The first tubes are each closed at the ends facing away from the inlet chamber and each second tube is at least partly arranged inside one of the first tubes, and the end of the second tube that faces away from the outlet chamber is open to the interior of the respective first tube. The second section has an inlet means and an outlet means.

IPC Classes  ?

• F28F 27/02 - Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
• F28F 9/02 - Header boxesEnd plates
• F28D 7/12 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically the surrounding tube being closed at one end, i.e. return type

Abstract

The present invention relates to an industrial production plant (100) comprising at least one reactor (102) for producing a flue gas and comprising a heat exchanger system (1) having a first heat exchanger section (3) for heat exchange between the flue gas and a fluid and a second heat exchanger section (4) for heat exchange between the flue gas and reaction air for the reactor (102), which can be preheated by means of the second heat exchanger section (4). The first heat exchanger section (3) is configured as a double-tube heat exchanger (5) with first tubes (7) each arranged one-way in a respective first jacket tube (9), and the second heat exchanger section (4) is configured as a tube bundle heat exchanger (25) with a tube bundle of second tubes (27) arranged in a second jacket tube (29) and each arranged one-way in the jacket tube (29). The flue gas can flow through the first and second tubes (7, 27). The double tube heat exchanger (5) and the tube bundle heat exchanger (25) are arranged vertically. The respective upper ends of the first and second tubes (7, 27) are connected together via a pipeline (23). The flue gas flows upwards through the doubled tube each exchanger (5) and downwards through the tube bundle heat exchanger (25).

IPC Classes  ?

• C09C 1/50 - Furnace black
• F28D 7/00 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation

Abstract

A tube bundle heat exchanger has tubes which are held at each side in tube plates or oval-tube collecting-tube plates and are connected to these in each case by means of a weld seam. The connection of the tubes to the inlet-side tube plate or oval-tube collecting-tube plate is formed in each case by means of a conical and/or trumpet-shaped transition piece. The cross section of the transition piece reduces as viewed in the gas flow direction in such a way that the inlet-side end, as viewed in the gas flow direction, of the transition piece is connected in a buttjoint to the tube plate or oval-tube collecting-tube plate. The inner and outer contours of the transition piece and of the welded connection region are formed without gaps and comers to the tube plate or oval tube collecting-tube plate and so as to be straight and/or with a radius, measured from the outer contour, of at least 5 mm.

IPC Classes  ?

• F28F 1/00 - Tubular elementsAssemblies of tubular elements
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28F 9/18 - Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically

Abstract

The invention relates to a heat exchanger (1) having a first section (3), through which a first medium can flow, and a second section (5), through which a second medium can flow, wherein during operation a heat exchange takes place between the first and the second medium, wherein the first section (3) has an inlet chamber (7) and first pipes (9) connected to the inlet chamber, and an outlet chamber (13) and second pipes (15) connected to the outlet chamber (13), wherein the first pipes (9) are each closed at the ends (9a) facing away from the inlet chamber (7) and wherein each second pipe (15) is at least partly arranged inside one of the first pipes (9), and the end (15a) of the second pipe (15) that faces away from the outlet chamber (13) is open to the interior of the respective first pipe (9), wherein the second section (5) has an inlet means (19) and an outlet means (21), wherein the inlet means (19) opens into a heat exchanger chamber (27) and the heat exchanger chamber (27) at least partly surrounds first pipes (9) of the first section (3) and wherein the heat exchanger chamber (27) is connected to the outlet means (21). According to the invention the inlet means (19) have a shut-off device (41) for shutting off the fluid flow of the second medium into the heat exchanger chamber (27), and a bypass device (37) connects the inlet means (29) and the outlet means (21) to lead the fluid flow of the second medium at least partly past the heat exchanger chamber (27), wherein the shut-off device (41) is arranged downstream of the bypass device (37) in the flow direction of the second medium.

IPC Classes  ?

• F28F 9/02 - Header boxesEnd plates
• F28F 27/02 - Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
• F28D 7/12 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically the surrounding tube being closed at one end, i.e. return type

Abstract

A method for welding two or more conduits includes aligning end portions thereof in an abutting relationship to define a gap. The method includes performing a spatter free root weld along the gap to configure a root layer while the inner circumferential surface side is unobstructed. After the root weld is complete, an outward thrust is applied along the inner circumferential surfaces of the conduits. During the application of the outward thrust, a filler weld is performed along the gap to fill the gap and to facilitate shrinkage of the filler and root weld materials longitudinally and radially outward while preventing pressing out of the filler and root weld materials radially inward of the inner circumferential surface.

IPC Classes  ?

• B23K 9/035 - Seam weldingBacking meansInserts with backing means disposed under the seam
• B23K 9/028 - Seam weldingBacking meansInserts for curved planar seams
• B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
• B23K 37/053 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical workClamping devices therefor

Abstract

A tube bundle heat exchanger includes tubes channeling a gas flow and a pressure shell enclosing the tubes channeling a coolant flow. First and second nozzles are disposed at a rear end of the pressure shell and third and fourth nozzles are disposed at a front end of the pressure shell. A feed pipe includes a first three-way valve and a drain pipe includes a second three-way valve. A first bypass pipe is connected to the first three-way valve and the third nozzle, a second bypass pipe is connected to the first three-way valve and the first nozzle, a third bypass pipe is connected to the second three-way valve and the second nozzle, and a fourth bypass pipe is connected to the second three-way valve and the fourth nozzle. One of the three-way valves is controllable.

IPC Classes  ?

• B60H 1/00 - Heating, cooling or ventilating devices
• F28F 27/02 - Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
• F28F 9/02 - Header boxesEnd plates
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation

Abstract

A tube bundle heat exchanger has tubes which are held at each side in tube plates or oval-tube collecting-tube plates and are connected to these in each case by means of a weld seam. The connection of the tubes to the inlet-side tube plate or oval-tube collecting-tube plate is formed in each case by means of a conical and/or trumpet-shaped transition piece. The cross section of the transition piece reduces as viewed in the gas flow direction in such a way that the inlet-side end, as viewed in the gas flow direction, of the transition piece is connected in a butt joint to the tube plate or oval-tube collecting-tube plate. The inner and outer contours of the transition piece and of the welded connection region are formed without gaps and corners to the tube plate or oval tube collecting-tube plate and so as to be straight and/or with a radius, measured from the outer contour, of at least 5 mm.

IPC Classes  ?

• F28F 9/18 - Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
• F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
• F28F 1/00 - Tubular elementsAssemblies of tubular elements

Abstract

A waste heat boiler includes an axial bypass pipe and multiple heat transfer pipes disposed within a cylindrical jacket. A hot exhaust gas stream transported between inlet and outlet ends of the heat transfer pipes is cooled by a coolant. A control system controls gas passage velocity and quantity of the exhaust gas stream through the bypass pipe whereby the exhaust gas stream exhaust temperature is maintained within a predetermined temperature range. The control system includes a stopper disposed at the outlet end of the bypass pipe and has a head plate extending into the outlet end of the bypass pipe. The stopper is axially displaceable from a closed position, where an outer surface of the stopper head plate contacts an inner surface of the bypass pipe outlet end. The gas passage formed between the inner surface of the bypass pipe outlet end and the outer surface of the stopper head plate has a cross-section that increases as the stopper is axially displaced from the closed position. The stopper is cooled by a cooling medium.

IPC Classes  ?

• F22B 1/18 - Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines

Goods & Services

Process gas coolers for the petrochemical or chemical industry; heat exchangers (as part of machines and plants made up of these machines or as part of a steam generator system) for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or for heat recovery in power stations; high-temperature preheaters (as part of machines and plants made up these machines or as part of a steam generator system) for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture; recuperators (as part of machines and plants made up of these machines or as part of a steam generator system) for use in the metallurgical industry, on melting furnaces of mineral wool production, chemical or petrochemical manufacturing processes, or in fluidised bed furnaces for sludge combustion; thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes; heat exchangers (as par of machines and plants made up of these machines or as part of a steam generator system) for air or fuel preheating; heat exchangers (as part of machines and plants made up of these machines or as part of a steam generator system) for recovery of gas turbine waste heat. Steam generator system for process gas and heat recovery in "steam reforming" manufacturing processes, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes; heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes; heat recovery steam generators for the utilisation of gas turbine heat. Repair and maintenance of the products mentioned in classes 7 and 11. Engineering services for the products mentioned in classes 7 and 11.

Goods & Services

Process gas coolers for the petrochemical or chemical industry; heat exchangers (as part of machines and plants made up of these machines or as part of a steam generator system) for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or for heat recovery in power stations; high-temperature preheaters (as part of machines and plants made up these machines or as part of a steam generator system) for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture; recuperators (as part of machines and plants made up of these machines or as part of a steam generator system) for use in the metallurgical industry, on melting furnaces of mineral wool production, chemical or petrochemical manufacturing processes, or in fluidised bed furnaces for sludge combustion; thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes; heat exchangers (as par of machines and plants made up of these machines or as part of a steam generator system) for air or fuel preheating; heat exchangers (as part of machines and plants made up of these machines or as part of a steam generator system) for recovery of gas turbine waste heat. Steam generator system for process gas and heat recovery in "steam reforming" manufacturing processes, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes; heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes; heat recovery steam generators for the utilisation of gas turbine heat. Repair and maintenance of the products mentioned in classes 7 and 11. Engineering services for the products mentioned in classes 7 and 11.

Goods & Services

Steam generator unit for process gas and heat recovery in "steam reforming" manufacturing processes, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes; heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes; heat recovery steam generators for the utilization of gas turbine heat; process gas coolers for the petrochemical or chemical industry; heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or for the heat recovery in power stations; high-temperature preheaters as part of machines and plants made up of these machines or as part of a steam generator system for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture; heat recuperators as part of machines and plants made up of these machines or as part of a steam generator system for the use in the metallurgical industry, on melting furnaces of the mineral wool production, chemical or petrochemical manufacturing processes, or in fluidized bed furnaces, for sludge combustion; thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes; heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for air or fuel preheating; heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for recovery of gas turbine waste heat Repair and maintenance of steam generator unit for process gas and heat recovery in "steam reforming" manufacturing processes, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes, heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes, heat recovery steam generators for the utilization of gas turbine heat, process gas coolers for the petrochemical or chemical industry, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or heat recovery in power stations, high-temperature preheaters as part of machines and plants made up of these machines or as part of a steam generator system for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture, heat recuperators as part of machines and plants made up of these machines or as part of a steam generator system for the use in the metallurgical industry, on melting furnaces of the mineral wool production, chemical or petrochemical manufacturing processes, or in fluidized bed furnaces for sludge combustion, thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for air or fuel preheating, and heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for recovery of gas turbine waste heat Engineering services for steam generator unit for process gas and heat recovery in "steam reforming" manufacturing [process,] *processes,* heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes, heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes, heat recovery steam generators for the utilization of gas turbine heat, process gas coolers for the petrochemical or chemical industry, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or for heat recovery in power stations, high-temperature preheaters as part of machines and plants made up of these machines or as part of a steam generator system for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture, heat recuperators as part of machines and plants made up of these machines or as part of a steam generator system for the use in the metallurgical industry, on melting furnaces of the mineral wool production, chemical or petrochemical manufacturing processes in fluidized bed *,or* furnaces for sludge combustion, thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for air or fuel preheating, and heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for recovery of gas turbine waste heat

Goods & Services

Steam generator unit for process gas and heat recovery in "steam reforming" manufacturing processes, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes; heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes; heat recovery steam generators for the utilization of gas turbine heat; process gas coolers for the petrochemical or chemical industry; heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or [ the ] heat recovery in power stations; high-temperature preheaters as part of machines and plants made up of these machines or as part of a steam generator system for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture; heat recuperators as part of machines and plants made up of these machines or as part of a steam generator system for the use in the metallurgical industry, on melting furnaces of the mineral wool production, chemical or petrochemical manufacturing processes, or in fluidized bed furnaces [ , ] for sludge combustion; thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes; heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for air or fuel preheating; heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for recovery of gas turbine waste heat Repair and maintenance of steam generator unit for process gas and heat recovery in "steam reforming" manufacturing processes, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes, heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes, heat recovery steam generators for the utilization of gas turbine heat, process gas coolers for the petrochemical or chemical industry, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or *for* heat recovery in power stations, high-temperature preheaters as part of machines and plants made up of these machines or as part of a steam generator system for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture, heat recuperators as part of machines and plants made up of these machines or as part of a steam generator system for the use in the metallurgical industry, on melting furnaces of the mineral wool production, chemical or petrochemical manufacturing processes, or in fluidized bed furnaces for sludge combustion, thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for air or fuel preheating [ , ] and heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for recovery of gas turbine waste heat Engineering services for steam generator unit for process gas and heat recovery in "steam reforming" manufacturing [ process ] * processes *, heat recovery in chemical and metallurgical manufacturing processes, heat recovery after partial oxidation, heat recovery downstream of ammonia combustion in nitric acid and caprolactam manufacturing processes, heat recovery steam generators in fire tube, water tube and double tube design for chemical, metallurgical and glass technological manufacturing processes, heat recovery steam generators for the utilization of gas turbine heat, process gas coolers for the petrochemical or chemical industry, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for heat recovery from manufacturing processes in the chemical, petrochemical, metallurgical or glass industry or for heat recovery in power stations, high-temperature preheaters as part of machines and plants made up of these machines or as part of a steam generator system for air, gaseous or liquid substances for chemical and metallurgical manufacturing processes or glass manufacture, heat recuperators as part of machines and plants made up of these machines or as part of a steam generator system for the use in the metallurgical industry, on melting furnaces of the mineral wool production, chemical or petrochemical manufacturing processes * , or * in fluidized bed furnaces for sludge combustion, thermal post-combustion furnaces for dust-laden gases, blast furnace gas containing CO or exhaust air containing solvents downstream of various manufacturing processes, heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for air or fuel preheating [ , ] and heat exchangers as part of machines and plants made up of these machines or as part of a steam generator system for recovery of gas turbine waste heat

Goods & Services

Tuyaux, tuyauteries et combinaisons de tuyaux en métal, grilles, comme grilles fixes, grilles refroidies à l'eau, grilles à mouvement va-et-vient, grilles tournantes en tambour, grilles mobiles, garnitures pour les foyers et fours cités dans la classe 11, comme clapets de réglage, vannes, tuyauteries, réservoirs de magasinage en métal, pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures. Chaudières à vapeur fixes et déplaçables pour marine, de toute sorte de fabrication; chaudières de récupération productrices de vapeur ou d'eau chaude, surchauffeurs de vapeur, surchauffeurs à tube de fumée, surchauffeurs indirects de vapeur, tuyaux à surchauffeurs, capots à surchauffeurs, tubes serpentins; caissons à collecteurs de vapeur, échangeurs de chaleur, régulateurs pour débit de vapeur et pression de vapeur, souffleries aspirantes et à pression comme des souffleries axiales à pales fixes ou interchangeables, souffleries radiales, souffleries à rayonnement, souffleries à piston, pompes à piston rotatives, dispositifs de commande pour telles souffleries; grilles, comme grilles fixes, grilles refroidies à l'eau, grilles à mouvement va-et-vient, grilles tournantes en tambour, grilles mobiles, souffleurs à suie, dispositifs de nettoyage des tubes, dispositifs à alimenter et décendrer automatiques; dispositifs de transport pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures. Chaudières à eau chaude, chaudières de récupération productrices de vapeur ou d'eau chaude, tubes serpentins, caissons à collecteurs de vapeur, réchauffeurs d'eau d'alimentation, réchauffeurs d'air, réchauffeurs de gaz, sécheurs de gaz, échangeurs de chaleur, refroidisseurs pour matières liquides et gazeuses; régulateurs pour débit de vapeur et pression de vapeur, grilles, comme grilles fixes, grilles refroidies à l'eau, grilles à mouvement va-et-vient, grilles tournantes en tambour, grilles mobiles, dispositifs à dépoussiérer le gaz et autres appareils similaires; limiteurs de tirage de cheminée ou amplificateurs; brûleurs pour combustibles liquides ou gazeux; foyers pour combustibles solides, liquides ou gazeux ainsi que dispositifs de réglage pour ces foyers; fours pour l'industrie, garnitures pour tels foyers et fours, comme portes et lucarnes, fours pour la crémation des immondices; réacteurs à génération de vapeur et pour l'industrie chimiques. Chaudières à vapeur fixes et déplaçables pour locomotives et locomobiles, de toute sorte de fabrication. Tuyaux, tuyauteries et combinaisons de tuyaux en matière synthétique. Tuyaux, tuyauterie et combinaisons de tuyaux en matières synthétiques, garnitures pour les foyers et fours cités dans la classe 11, comme tuyauteries. Garnitures pour les foyers et fours cités dans la classe 11, comme clapets de réglage, vannes, réservoirs de magasinage en matière synthétique, pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures. Tuyaux, tuyauterie et combinaisons de tuyaux en verre ou en céramique, réservoirs de magasinage en verre ou céramique pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures.

Goods & Services

Tuyaux, tuyauteries et combinaisons de tuyaux en métal, grilles, comme grilles fixes, grilles refroidies à l'eau, grilles à mouvement va-et-vient, grilles tournantes en tambour, grilles mobiles, garnitures pour les foyers et fours cités dans la classe 11, comme clapets de réglage, vannes, tuyauteries; réservoirs de magasinage en métal pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures. Chaudières à vapeur fixes et déplaçables pour marine, de toute sorte de fabrication; chaudières de récupération productrices de vapeur ou d'eau chaude, surchauffeurs de vapeur, surchauffeurs à tubes de fumée, surchauffeurs indirects de vapeur, tuyaux à surchauffeurs, capots à surchauffeurs, tubes serpentins; caissons à collecteurs de vapeur, échangeurs de chaleur, régulateurs pour débit de vapeur et pression de vapeur, souffleries aspirantes et à pression comme des souffleries axiales à pales fixes ou interchangeables, souffleries radiales, souffleries à rayonnement, souffleries à piston, pompes à piston rotatives, dispositifs de commande pour telles souffleries; grilles, comme grilles fixes, grilles refroidies à l'eau, grilles à mouvement va-et-vient, grilles tournantes en tambour, grilles mobiles, souffleurs à suie, dispositifs de nettoyage des tubes, dispositifs à alimenter et décendrer automatiques; dispositifs de transport pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures. Chaudières à eau chaude, chaudières de récupération productrices de vapeur ou d'eau chaude, tubes serpentins; caissons à collecteurs de vapeur, réchauffeurs d'eau d'alimentation, réchauffeurs d'air, réchauffeurs de gaz, sécheurs de gaz, échangeurs de chaleur, refroidisseurs pour matières liquides et gazeuses; régulateurs pour débit de vapeur et pression de vapeur, grilles, comme grilles fixes, grilles refroidies à l'eau, grilles à mouvement va-et-vient, grilles tournantes en tambour, grilles mobiles, dispositifs à dépoussiérer le gaz et autres appareils similaires; limiteurs de tirage de cheminée ou amplificateurs; brûleurs pour combustibles liquides ou gazeux; foyers pour combustibles solides, liquides ou gazeux ainsi que dispositifs de réglage pour ces foyers; fours pour l'industrie, garnitures pour tels foyers et fours, comme portes et lucarnes, fours pour la crémation des immondices; réacteurs à génération de vapeur et pour l'industrie chimique. Chaudières à vapeur fixes et déplaçables pour locomotives et locomobiles, de toute sorte de fabrication. Tuyaux, tuyauteries et combinaisons de tuyaux en matière synthétique. Tuyaux, tuyauteries et combinaisons de tuyaux en matière synthétique ou en céramique; garnitures pour les foyers et fours cités dans la classe 11, comme tuyauteries. Garnitures pour les foyers et fours cités dans la classe 11, comme clapets de réglage, vannes; réservoirs de magasinage en matière synthétique, pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures. Tuyaux, tuyauteries et combinaisons de tuyaux en verre, réservoirs de magasinage en verre pour éléments solides, liquides ou gazeux, adaptés à toutes les pressions et températures.