A thermal energy storage and exchange device (100) comprising: - an external casing made of metal carpentry (1), - a fluidizable bed of particles (4), - metal separation means (3), peripheral to the bed of particles, and distant from 5 the walls of the external casing so as to create a hollow volume (20), - an amount of stationary particles (2) filling-in said hollow volume, - means (5) for heating the fluidized bed, in configuration so that the metal separation means allows the tightness of the fluidization air and the section of stationary particles, nor fluidized nor aerated, acts as thermal insulation.
A heat storage and transfer method, having: providing a plurality of heat storage and transfer modules, arranged thermally in series, each module of the plurality having a bed of fluidizable solid particles as a heat storage and transfer means; adducting a flow of a heat transfer fluid (HTF) to cross the modules in serial thermal sequence; fluidizing each of the beds of fluidizable solid particles so as to foster heat exchange between the bed particles with said heat transfer fluid, the arrangement being such that the heat transfer fluid can cross the modules in sequence according to opposite directions, to transfer or extract thermal energy, respectively, from the beds of particles.
A transport system for high temperature bulk materials in industrial plants, having a plurality of volumetric containers arranged in sequence along a direction of transport and fastened to a movable conveyor belt, which containers have lateral walls which engage mutually to form a continuous transport region.
B65G 17/12 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element
B65G 17/36 - Individual load-carriers having concave surfaces, e.g. buckets
An apparatus for the accumulation and transfer of thermal energy is disclosed including a thermal energy charging device having a bed of fluidizable solid particles received within a casing and acting as heat accumulation means by being exposed to a thermal energy source, heat exchange means operating in counter-current, configured for an exchange of thermal energy between a heated vector mass of the bed particles and an operative fluid, transport means configured for feeding the vector mass of the bed particles from the device to the heat exchange means and for returning part of the vector mass, downstream the heat exchange means, to the device, and a control unit associated with parameter detecting means arranged selected locations of the apparatus to control the flow of the vector mass within the apparatus.
F28D 19/02 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using granular particles
F28D 13/00 - Heat-exchange apparatus using a fluidised bed
F28D 20/00 - Heat storage plants or apparatus in generalRegenerative heat-exchange apparatus not covered by groups or
5.
SYSTEM AND METHOD FOR THE THERMAL PROCESSING OF BULK MATERIAL BY INTENSE CONCENTRATED SOLAR POWER
A treatment system for solid bulk materials such as limestone or mineral ore is provided having a belt conveyor configured for receiving the solid bulk material upon a transportation surface thereof and for displacing the material from a charging region to a discharging region according to a rectilinear path and a heating chamber, configured to receive a solar radiation conveyed by an external field of heliostats. A length portion of the transportation surface passes within or below the heating chamber so that thermal energy associated with the solar radiation is transferred to the bulk material by direct impingement or by reflection or re-irradiation by internal surfaces or walls of the heating chamber.
F26B 3/28 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
F26B 17/04 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materialsMachines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
6.
SYSTEM AND METHOD FOR THERMAL ENERGY STORAGE AND TRASFER BASED UPON A BED OF FLUIDIZED PARTICLES
A heat storage and transfer method, comprising the following steps: - providing a plurality of heat storage and transfer modules (151-154), arranged thermally in series, each module of said plurality comprising a bed of fluidizable solid particles (150) as a heat storage and transfer means; - adducting a flow of a heat transfer fluid (HTF) to cross said modules (151-154) in serial thermal sequence; - fluidizing each of said beds of fluidizable solid particles (150) so as to foster heat exchange between the bed particles with said heat transfer fluid, the arrangement being such that the heat transfer fluid can cross the modules in sequence according to opposite directions, to transfer or extract thermal energy, respectively, from the beds of particles.
A heat storage and transfer method, comprising the following steps: - providing a plurality of heat storage and transfer modules (151-154), arranged thermally in series, each module of said plurality comprising a bed of fluidizable solid particles (150) as a heat storage and transfer means; - adducting a flow of a heat transfer fluid (HTF) to cross said modules (151-154) in serial thermal sequence; - fluidizing each of said beds of fluidizable solid particles (150) so as to foster heat exchange between the bed particles with said heat transfer fluid, the arrangement being such that the heat transfer fluid can cross the modules in sequence according to opposite directions, to transfer or extract thermal energy, respectively, from the beds of particles.
A device is disclosed for the storage and transfer of solar thermal energy which includes a casing having a irradiation opening for the entry of incident solar radiation in a irradiation region of the casing. a bed of fluidizable solid particles received within the casing, and a plurality of reflecting and radiating surfaces arranged within the irradiation region and configured to convey the solar radiation entering through the irradiation opening, after multiple reflections, on the bed of particles.
A transport system (100) for high temperature bulk materials in industrial plants, comprising a plurality of volumetric containers (1) arranged in sequence along a direction of transport (L) and fastened to a movable conveyor belt (101), which containers have lateral walls which engage mutually to form a continuous transport region.
B65G 17/10 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface forming a longitudinal trough
B65G 17/36 - Individual load-carriers having concave surfaces, e.g. buckets
B65G 19/04 - Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors for moving bulk material in open troughs or channels
An apparatus (100) for the accumulation and transfer of thermal energy, comprising: a thermal energy charging device (1), having a bed of fluidizable solid particles received within a casing and acting as heat accumulation means by being exposed to a thermal energy source; heat exchange means (3) operating in counter-current, configured for an exchange of thermal energy between a heated vector mass of said bed particles and an operative fluid; transport means (5) configured for feeding said vector mass of said bed particles from said device (1) to said heat exchange means (3) and for returning at least a part of said vector mass, downstream said heat exchange means (3), to said device (1); a control unit (10) associated with parameter detecting means (6).
F28D 19/02 - Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using granular particles
F28D 13/00 - Heat-exchange apparatus using a fluidised bed
F28D 20/00 - Heat storage plants or apparatus in generalRegenerative heat-exchange apparatus not covered by groups or
11.
DEVICE, PLANT AND METHOD FOR THE STORAGE AND TRANSFER OF THERMAL ENERGY OF SOLAR ORIGIN
The object of the present invention is to use the high temperature thermal power stored in the fluid bed in conjunction with thermophotovoltaic (TPV) technology. TPV technology requires thermal emitters at high temperature (>600° C.) to produce electricity from thermal radiation. TPV thermal emitters are located immersed in or exposed to a hot particles fluidized bed, protected by suitable layers of high temperature resistant material, like ceramic or refractory walls. Such high temperature fluidized bed, will provide thermal power to the TPV cells, to produce electricity.
A plant for the accumulation and transfer of thermal energy, which plant has an accumulation device of the kind with a bed of fluidizable solid particles. The plant further has for each accumulation device:
electric resistor means arranged within the casing and thermally connected with the bed of particles, which electric resistors are configured for transmitting thermal energy generated by Joule effect to the particles and they are fed by exceeding electric energy from wind or photovoltaic source; and
heat exchange means, also thermally connected with the bed of particles and which can be selectively actuated to receive thermal energy therefrom,
the overall configuration being such that the thermal energy is transferred from the resistor means to the fluidizable solid particles of the bed and from the fluidizable solid particles to the heat exchange means.
A treatment system (100; 200; 300) for solid bulk material, e.g. limestone or mineral ore, which treatment system (1) comprises: - a belt conveyor (150), configured for receiving the solid bulk material upon a transportation surface (158) thereof and for displacing said material from a charging region (155) to a discharging region (156) according to a rectilinear path; - a heating chamber (130), configured to receive a solar radiation conveyed by an external field of heliostats (110); wherein a length portion of said transportation surface (158) passes within or below said heating chamber (130) in such a way that thermal energy associated with said solar radiation is transferred to the bulk material by direct impingement or by reflection or re-irradiation by internal surfaces or walls (136) of said heating chamber (130).
F26B 3/28 - Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
F26B 17/02 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materialsMachines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts propelling the materials over stationary surfaces
F26B 17/04 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materialsMachines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
14.
DEVICE FOR THE STORAGE OF THERMAL ENERGY OF SOLAR ORIGIN BASED UPON MULTIPLE REFLECTIONS
A device (1) for the storage and transfer of thermal energy of solar origin, which device (1) comprises: - a containment casing (2), having an irradiation opening (10) configured to allow the entrance of an incident solar radiation in an irradiation region (350) defined within said casing (2); - a bed (3) of fluidizable particles received within said casing (2); - at least a reflecting and/or re-radiating surface (701; 702; 703) arranged within said irradiation region (350) and configured to reflect the solar radiation entering through said irradiation opening (10) directly on a freeboard (35) of said bed of particles (3) or on another reflecting and/ or re-radiating surface of said irradiation region (350).
F24S 10/30 - Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
F24S 20/20 - Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
F24S 23/79 - Arrangements for concentrating solar rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
F24S 60/00 - Arrangements for storing heat collected by solar heat collectors
F24S 80/20 - Working fluids specially adapted for solar heat collectors
F28D 13/00 - Heat-exchange apparatus using a fluidised bed
15.
PLANT AND METHOD FOR ACCUMULATION OF ENERGY IN THERMAL FORM
A plant for the accumulation of energy in thermal form, comprising at least one accumulation device (1), said accumulation device (1) having: - a containment casing (2); - a bed (3) of fluidizable solid particles received within said casing (2); - heating means (7; 70; 70'; 700) thermally connected with said bed of particles (3), which heating means is configured to transmit thermal energy to said particles; and - heat exchange means (8; 5), also thermally connected to said bed of particles (3) and selectively activated to receive thermal energy therefrom, the overall configuration being such that said thermal energy is transferred from the heating means (7; 70; 70'; 700) to the fluidizable solid particles of said bed (3) and, in simultaneous or deferred manner, from said fluidizable solid particles to said heat exchange means (8; 5), wherein the plant is configured to feed said heating means by means of excess electric energy, for example coming from a renewable source, particularly wind or photovoltaic energy, or by means of residual thermal energy, that is thermal waste from industrial processes.
A plant for the accumulation of energy in thermal form, comprising at least one accumulation device (1), said accumulation device (1) having: - a containment casing (2); - a bed (3) of fluidizable solid particles received within said casing (2); - heating means (7; 70; 70'; 700) thermally connected with said bed of particles (3), which heating means is configured to transmit thermal energy to said particles; and - heat exchange means (8; 5), also thermally connected to said bed of particles (3) and selectively activated to receive thermal energy therefrom, the overall configuration being such that said thermal energy is transferred from the heating means (7; 70; 70'; 700) to the fluidizable solid particles of said bed (3) and, in simultaneous or deferred manner, from said fluidizable solid particles to said heat exchange means (8; 5), wherein the plant is configured to feed said heating means by means of excess electric energy, for example coming from a renewable source, particularly wind or photovoltaic energy, or by means of residual thermal energy, that is thermal waste from industrial processes.
The object of the present invention is to use the high temperature thermal power stored in the fluid bed in conjunction with thermophotovoltaic (TPV) technology. TPV technology requires thermal emitters at high temperature (>600°C) to produce electricity from thermal radiation. TPV thermal emitters are located immersed in or exposed to a hot particles fluidized bed, protected by suitable layers of high temperature resistant material, like ceramic or refractory walls. Such high temperature fluidized bed, will provide thermal power to the TPV cells, to produce electricity.
A device for accumulation and exchange of thermal energy of solar origin is provided. The device includes: a casing which defines an internal compartment and has an irradiation opening configured to allow the entry of concentrated solar radiation, the opening puts in direct communication the inner compartment with the external environment being devoid, in use, of closure or screen means; a bed of fluidizable solid particles, received within the inner compartment of the casing, the bed has an operative region directly exposed to the concentrated solar radiation that enters through the opening, in such a way that the particles of the operative region absorb thermal energy from solar radiation; and fluidization means of the bed of particles, configured to adduce a fluidizing gas into the compartment at the operative region.
Device (1 ) that allows storing thermal energy of solar origin through a layer of granular material (100) capable of absorbing thermal energy from solar radiation, acting as a storage and transfer means. The accumulation material is housed in a solar receiver (2) and in translational motion with respect thereto. This motion is obtained by gravity by means of an inclined plane (200). Solar energy is concentrated on the device by means of an optical system with beam down configuration. The accumulation material absorbs concentrated solar thermal energy and transfers it to a tube heat exchanger (5). The discharge of the solar receiver feeds, downstream of the heat exchanger, a mechanical conveyor (3), in turn in communication with an elevator (4) which returns the granular material to the solar receiver.
A conveyor belt (10) of closed-path type comprising a plurality of transport plates (50), defining a transport surface for the material in a forward run of the conveyor belt itself, which plates are arranged in sequence along a longitudinal transport direction (L), wherein each plate bears a first (55) and a second (56) longitudinal end portion thereat, in said forward run, it is respectively superimposed on an adjacent plate arranged upstream of the sequence with respect to the longitudinal transport direction and placed under an adjacent plate arranged downstream in such sequence, or vice versa; and an annular structure (51) for connecting said plates being arranged, in said forward run, below said plates, wherein at least one of said plates, at said first or second longitudinal portion of superimposing or placing under an adjacent plate, has a cross section with thickness (s) decreased with respect to a remaining portion of the plate itself.
B65G 17/10 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface forming a longitudinal trough
B65G 21/20 - Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
B65G 39/12 - Arrangements of rollers mounted on framework
F23J 1/02 - Apparatus for removing ash, clinker or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
21.
HIGH ENERGY-EFFICIENT DEVICE, SYSTEM AND METHOD FOR THE USE OF THERMAL ENERGY OF SOLAR ORIGIN
A device (1) for accumulation and exchange of thermal energy of solar origin, which device (1) is configured to receive a solar radiation concentrated by an optical system, which device (1) comprises: - a casing (2) which defines an internal compartment (20) and has an irradiation opening (10; 10') configured to allow the entry of the concentrated solar radiation, which opening (10; 10') puts in direct communication said inner compartment (20) with the external environment being devoid, in use, of closure or screen means; - a bed (3) of fluidizable solid particles, received within said inner compartment (20) of said casing (2), which bed (3) has an operative region (30) directly exposed, in use, to the concentrated solar radiation that enters through said opening (10; 10'), in such a way that the particles of said operative region (30) absorb thermal energy from solar radiation; and - fluidization means (4) of said bed of particles (3), configured to adduce a fluidizing gas into said compartment (20) at least at said operative region (30).
Apparatus and machines for generating energy from renewable
sources; apparatus and machines for the production of energy
from renewable and fossil sources; solar heating apparatus
and machines, apparatus and machines for generating
electricity from solar radiations; concentrating solar
apparatus and machines; solar thermal energy collectors,
accumulators and generators; apparatus and machines for
generating energy from urban waste; apparatus and machines
for converting solar energy to sensible heat and/or latent
heat, namely solar power towers, solar receivers, solar
boilers, solar steam generators, solar superheaters, solar
reheaters, solar supercritical steam generators, solar
supercritical C02 generators, steam turbines, gas turbines,
generation sets, and cooling towers; apparatus and
equipments for producing pressurized steam or supercritical
C02 using solar energy; apparatus and equipments for the
storage of sensible and/or latent heat, namely thermal
energy storage systems; heat exchangers; solar thermal
installations, namely solar thermal modules; solar power
generation sets composed of solar thermal modules.
Alternative energy generation power plants; heat generators; power plants; solar collectors; solar energy receivers; solar furnaces; solar reactors; solar-powered heating and industrial boilers; solar steam generators; thermal energy storage plants; heat exchangers, other than parts of machines; solar thermal installations, namely, solar thermal modules
24.
ENERGY-EFFICIENT HIGH LEVEL DEVICE, PLANT AND METHOD FOR THE USE OF THERMAL ENERGY OF SOLAR ORIGIN
A device (1) for storage and exchange of thermal energy of solar origin, which device (1) is configured to receive a concentrated solar radiation using an optical system of "beam down" type, which device (1) comprises: - a containment casing (2) which defines an internal compartment (20) and has an upper opening (10) configured to allow entry of the concentrated solar radiation, which opening (10) puts in direct communication the internal compartment (20) with the external environment having no closure or screen means; - a bed (3) of fluidizable solid particles, received within the internal compartment (20), which bed (3) has an irradiated operative region (30) directly exposed, in use, to the concentrated solar radiation that enters through said opening (20) and a heat accumulation region (31) adjacent to said operative region (30); - fluidization elements (4) of the bed of particles (3), configured to feed fluidization air within the compartment (20), which fluidization means (4) is configured to determine different fluid-dynamic regimens in the operative region and in the accumulation region, based upon different fluidization speeds, wherein, in use, the particles of the operative region (30) absorb thermal energy from the solar radiation and they give it to the particles of the accumulation region (31).
A conveyor belt (10) of closed-path type comprising a plurality of transport plates (50), defining a transport surface for the material in a forward run of the conveyor belt itself, which plates are arranged in sequence along a longitudinal transport direction (L), wherein each plate bears a first (55) and a second (56) longitudinal end portion thereat, in said forward run, it is respectively superimposed on an adjacent plate arranged upstream of the sequence with respect to the longitudinal transport direction and placed under an adjacent plate arranged downstream in such sequence, or vice versa; and an annular structure (51) for connecting said plates being arranged, in said forward run, below said plates, wherein at least one of said plates, at said first or second longitudinal portion of superimposing or placing under an adjacent plate, has a cross section with thickness (s) decreased with respect to a remaining portion of the plate itself.
B65G 15/48 - Belts or like endless load-carriers metallic
B65G 17/10 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface forming a longitudinal trough
B65G 21/20 - Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
B65G 39/12 - Arrangements of rollers mounted on framework
F23J 1/02 - Apparatus for removing ash, clinker or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
F27D 3/12 - Travelling or movable supports or containers for the charge
A conveyor belt (10) of closed-path type comprising a plurality of transport plates (50), defining a transport surface for the material in a forward run of the conveyor belt itself, which plates are arranged in sequence along a longitudinal transport direction (L), wherein each plate bears a first (55) and a second (56) longitudinal end portion thereat, in said forward run, it is respectively superimposed on an adjacent plate arranged upstream of the sequence with respect to the longitudinal transport direction and placed under an adjacent plate arranged downstream in such sequence, or vice versa; and an annular structure (51) for connecting said plates being arranged, in said forward run, below said plates, wherein at least one of said plates, at said first or second longitudinal portion of superimposing or placing under an adjacent plate, has a cross section with thickness (s) decreased with respect to a remaining portion of the plate itself.
B65G 17/10 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface forming a longitudinal trough
B65G 21/20 - Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces
B65G 39/12 - Arrangements of rollers mounted on framework
F23J 1/02 - Apparatus for removing ash, clinker or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
Plants for continuous and dry extracting and cooling of
heavy ashes generated by boilers; conveyors and conveyor
belts resistant to high temperature; conveyor apparatus for
components of assembly lines and industrial plants; conveyor
apparatus for high temperature materials. Plants for generating energy from renewable sources, plants
for the production of energy from renewable and fossil
sources; solar heating plants, electric solar plants,
thermodynamic concentrating solar plants, waste-to-energy
plants for urban waste.
A cooling system (1) for heavy ashes of the type apt to be used in association with a combustion chamber (2), in particular for large flows rates of ashes deriving for example from solid fossil fuel in an energy-production unit, which system (1) comprises: • - a transport belt (31) for transporting the heavy ashes, apt to be arranged below the combustion chamber (2) and having a containment casing (3) and a transport surface (311) equipped with openings (9) for the transit of cooling air, which transport surface (311) is apt to receive the ashes produced in the combustion chamber (2) substantially in the form of continuous bed; and • - cooling means for cooling the heavy ashes received on said transport surface (311), which cooling means comprises at least one partitioned region (4) arranged below said transport surface (311) and forced feeding means (11) for a forced feeding of cooling air at said partitioned region (4),
The present invention relates to a cooling system for dry extraction of heavy bottom ash output from furnaces for solid fuel during storing step at hopper, characterized by suitable air intakes (2), placed on the sidewalls of the hopper (1) at the hopper bottom, through which a controlled amount of cooling air passes sucked up in the combustion chamber (12) by the depression value therein, capable to achieve an uniform and balanced distribution system for such air during storing step at hopper (1) which optimizes the cooling of the falling ash, leaving the total amount of the air entering the furnace unchanged. The distribution header of the intakes (2) is connected to the extractor environment (6) by the lid (7) through a suitable conduit (3) provided with automated valve (8) being open during the storing step allowing the cooling air through to pass said intakes (2) placed on the sidewalls of the hopper (1). A more efficient cooling may be obtained by any addition of water input by nozzles (14) suitably placed within the hopper (1). The water amount may be adjusted such that the ash cooling improvement function is actuated without humidifying it.
A conveyor belt (1) includes a metallic net belt (8) functionally driven by at least a traction drum (5), tensioned by at least a return drum (12) and supported by a plurality of independent transversal rollers (13). Belt (1) supports individually a plurality of plates (2) partially overlapping one another, so as to form a flat continuous transport surface as a mobile reliable plane that is resistant to extreme mechanical stress. Each of said plates (2) is suitably shaped so that an upper portion of one plate overlaps a lower portion of the following plate.
B65G 17/06 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
32.
Integrated system for the extraction of heavy ash, conversion thereof into light ash and reduction of unburnt matter
The present invention is about a process for treating all the ashes produced by a coal dust boiler (1), able to reduce the total unburnt matter content, to increase the combustion efficiency of the boiler (1), and to have the light ashes as the only waste arising from the coal combustion. In particular, said process provides for the extraction of the heavy ashes (4) from the boiler bottom (23), the ashes coming from the hoppers of the economizers (5) and the fraction of light ash richer of unburnt matter coming from the filters (11) used to collect the dust from the flue gas; said ashes are mixed in a silo (15), proportioned and transferred in one or more feeders (17) of the coal mills (18), and reintroduced in the boiler (1) after being mixed with the coal through the burners (2).
The present invention relates to an extraction and air/water cooling system and energy recovery for large flows of heavy ashes, produced by solid fuel boilers (100), able to reduce final temperature of the extracted ash, without increasing the air flow entering the throat of the boiler. When the air flow needed for cooling process exceeds the maximum flow admissible in the boiler, the system allows to the exceeding air and to the possible steam to be sent to the fume duct in the most appropriate point, thanks to a separation of the cooling environment made by the ash itself. The separation of the environments of the cooling system is handled automatically based upon a temperature signal of the ash at the system exhaust. If the cooling air is not sufficient to cool the ash, the cooling efficiency can be increased by adding atomized water. The added water flow usually is dosed based upon the ash flow and temperature so as to guarantee the full evaporation of the injected water in order to obtain at the exhaust, if necessary, dry ash suitable to be ground and transported pneumatically so as to be mixed to lighter ashes.
The present invention relates to an additional cooling system (1) for the dry extraction of large flow of heavy ashes produced by boilers (100) with solid fuel apt to decrease the temperature of the ashes. The system comprises an extractor with metallic belt (2) gathering the ash which deposits onto the bottom of the boiler (100), a crushing system (3), having the purpose of increasing the thermal exchange surface of the material, one or more metallic conveyors (4, 6) having the cooling function by introducing countercurrent air - flow running through transported ashes, an in-line cooling device (5) having the function of putting into contact the ash several times with additional countercurrent air in order to increase the possible exchange without necessarily increasing the air - flow entering the combustion chamber. Such additional air can be sent preferably upstream of the air heater or in atmosphere upon fines' captation (figure 1).
The present invention is about a conveyor plant for pyrites, other foreign materials like metal parts and occasionally ground solid fossil fuel, coming from the grinding mills of the solid fossil fuel, substantially comprising an open or enclosed metal container (1) inside which a metal conveyor belt (6) is disposed. The conveyor receives the material to be conveyed from the pyrites storage tanks (2) of each mill, through interception valves (3) and vibrating feeders (4) or directly from gravity discharge channels. Any spontaneous ignition of the conveyed material is controlled by a putting out system with water nozzles (17) or inert gas or steam admission nozzles (18) according to the plant configurations. The pyrites and the ground solid fossil fuel are collected in a stockage silo (16), it too provided with an inert gas or steam putting out system. For the storage tanks (2) a gas or steam inertization system is provided as well.
The present invention relates to a cooling system for dry extraction of heavy bottom ash output from furnaces for solid fuel during storing step at hopper, characterized by suitable air intakes (2), placed on the sidewalls of the hopper (1) at the hopper bottom, through which a controlled amount of cooling air passes sucked up in the combustion chamber (12) by the depression value therein, capable to achieve an uniform and balanced distribution system for such air during storing step at hopper (1) which optimizes the cooling of the falling ash, leaving the total amount of the air entering the furnace unchanged. The distribution header of the intakes (2) is connected to the extractor environment (6) by the lid (7) through a suitable conduit (3) provided with automated valve (8) being open during the storing step allowing the cooling air through to pass said intakes (2) placed on the sidewalls of the hopper (1). A more efficient cooling may be obtained by any addition of water input by nozzles (14) suitably placed within the hopper (1). The water amount may be adjusted such that the ash cooling improvement function is actuated without humidifying it.
The present invention is about an innovative metallic conveyor belt, comprising a metallic net traction element individually supporting a plurality of partially overlapping plates, in such a way to form a continuous planar surface belt that can be of considerable reliability and can be so much sturdy as to resist extreme mechanical and thermal stress. The load bearing planar surface and the absence of vibrations make it a suitable working plane for a plurality of uses, such as the separation by means of one or more deviators and/or channels of different materials or objects, and the transport without shakes of high temperature material, such as mould parts.
B65G 17/06 - Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriersEndless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
