Abrégé

Provided is a boiler soot cleaning apparatus with a quick opening and good sealing performance. The soot cleaning apparatus is mounted exactly opposite a rear tube plate of a fire tube type heat recovery boiler on an outlet flue plate, and comprises a soot cleaning channel tube (1), one end of the soot cleaning channel tube (1) being mounted on the outlet flue plate and a tube opening at the other end thereof being internally provided with a groove-shaped block (3), wherein a U-shaped baffle (2) is provided on the side, away from the tube opening, of the groove-shaped block (3), and a cover plate (5) matching the groove-shaped block (3) and freely tightening and opening the groove-shaped block (3) by using a threaded rod pin (7) is provided outside the tube opening correspondingly; a high temperature resistance spacer (4) is positioned between the cover plate (5) and the tube opening; and a handle (6) is provided on the side, away from the tube opening, of the cover plate (5). The soot cleaning apparatus further comprises a soot cleaning rod (8), the soot cleaning rod (8) being made of long circular steel and provided with a soot cleaning rod handle at a tail end and a wire brush at a top end.

Classes IPC  ?

• F23J 3/00 - Enlèvement des résidus solides se trouvant dans les passages ou dans les chambres situés au delà du foyer, p. ex. dans les conduits de fumée par souffleurs de suie

Abrégé

A flue gas waste heat recovery boiler for a rotary hearth furnace, comprising a waste heat boiler body (1), the waste heat boiler body (1) using a horizontal structure of lateral flushing horizontal channels, and the waste heat boiler body (1) being sequentially piecewise split, in the flowing direction of flue gas, into a front evaporation zone, an overheating zone, rear evaporation zones and a rear low-temperature heat receiving surface, the rear low-temperature heat receiving surface being zoned into two parallel soft water heating zones, the flue gas being outputted from the rear evaporation zones and then being inputted to one of the two soft water heating zones in an alternative manner; a front evaporator (2), an overheater (3), rear evaporators (41; 42; 43; 44) and soft water heaters are mounted in a flue gas flow channel of the front evaporation zone, the overheating zone, the rear evaporation zones and the two soft water heating zones, respectively; the front evaporator (2), the overheater (3), the rear evaporators (41; 42; 43; 44) and the soft water heaters are all serpentine tube heat exchangers having a small diameter and a thick wall.

Classes IPC  ?

• F22B 1/18 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un gaz chaud, p. ex. des gaz d'évacuation tels que les gaz d'échappement de moteurs à combustion interne
• F22B 37/00 - Détails ou parties constitutives des chaudières à vapeur
• F23J 1/06 - Dispositifs fonctionnant mécaniquement, p. ex. poussoirs à mâchefers

Abrégé

A high temperature solid heat recovery waste heat boiler and a method for recovering waste heat. The boiler is vertically disposed and is cylindrical. An upper portion of the boiler is provided with a material inlet (1). A lower portion of the boiler is provided with a material outlet (2). Supplied water of 4.5 MPa or more of a boiler system enters an inlet of a high parameter economizer (9), is heated inside the high parameter economizer (9), and then is sent into a high parameter steam drum (10). High parameter saturated boiler water above 4.0 MPa is formed inside the high parameter steam drum (10). The high parameter saturated water enters a high parameter front evaporator (5) and high parameter evaporators (71/72) along a high parameter boiler drop pipe (15), and forms a vapor-water mixture. The vapor-water mixture flows back into the high parameter steam drum (10) via a high parameter boiler riser pipe (16), and undergoes vapor-water separation inside the high parameter steam drum (10), so as to form high parameter saturated vapor above 4.0 MPa. Then the high parameter saturated vapor enters a high parameter low temperature superheater (62) and a high parameter high temperature superheater (61), so as to form high parameter superheated steam having a degree of superheating at or above 200°C. The method directly converts heat of high temperature solid particles into high parameter superheated steam, thereby improving heat efficiency.

Classes IPC  ?

• F22B 1/04 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude consistant en scories, déchets chauds ou blocs chauds, p. ex. des blocs de fer
• F22B 37/10 - Tubes d'eauAccessoires à cet effet

Abrégé

A cement kiln rear portion and bypass waste heat boiler comprises a boiler body (1) disposed in a vertical structure, heat transfer surface tubes (3) disposed inside a flue of the boiler body (1), and a vibration ash removal device (7) corresponding to the heat transfer surface tubes (3). The heat transfer surface tubes (3) are disposed from top to bottom inside the flue of the boiler body (1). Each heat transfer surface tube (3) is vertically disposed in an integrated manner. The vibration ash removal device (7) is disposed at the bottom in a vertical direction of the heat transfer surface tubes (3), or disposed near the bottom in the vertical direction of the heat transfer surface tubes (3). During vibration ash cleaning, the heat transfer surface tubes (3) undergo ash cleaning as a whole, thereby achieving a favorable effect of vibration transmission and a significant effect of ash cleaning. The invention avoids ash deposit on a surface of a heat transfer surface tube (3), thereby effectively avoiding reduction of heat exchange efficiency of a heat transfer surface tube (3) caused by ash deposit.

Classes IPC  ?

• F22B 1/18 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un gaz chaud, p. ex. des gaz d'évacuation tels que les gaz d'échappement de moteurs à combustion interne
• F22B 37/10 - Tubes d'eauAccessoires à cet effet
• F22B 37/20 - Dispositifs de support, p. ex. pour la fixation des faisceaux de tubes d'eau
• F23J 3/00 - Enlèvement des résidus solides se trouvant dans les passages ou dans les chambres situés au delà du foyer, p. ex. dans les conduits de fumée par souffleurs de suie
• F27D 17/00 - Dispositions pour l'utilisation de la chaleur perdueDispositions pour l'utilisation ou pour l'élimination des gaz résiduaires

Abrégé

Disclosed by the present invention is an on-line dust cleaning device for low-temperature dust-containing tail gas. The device comprises a hollow furnace wall and a netted dust-capturing device, wherein the furnace wall is provided with an furnace wall smoke inlet and a furnace wall smoke outlet; the netted dust-capturing device is disposed near the furnace wall smoke inlet and comprises a netted dust-capturing belt, a driving device, a driving wheel and a driven wheel; the driving wheel and the driven wheel are respectively supported outside the furnace wall through a bracket; the driving wheel is connected with an output end of the driving device; the netted dust-capturing belt is wound at the peripheries of the driving wheel and the driven wheel; and the driving wheel and the driven wheel are arranged in an airtight cavity; and the airtight cavity is connected with the wall surface of the furnace wall in an airtight manner. By adopting the present invention, most of the dust in the tail gas can be cleaned without influencing the waste heat of the lower-temperature tail gas, thus ensuring the safe and normal operation of a waste heat recycling device.

Classes IPC  ?

• F27D 17/00 - Dispositions pour l'utilisation de la chaleur perdueDispositions pour l'utilisation ou pour l'élimination des gaz résiduaires

Abrégé

A heat transfer tube bundle for a flue-type waste heat boiler, comprising an inlet distributing header (2) and outlet collecting header (3) disposed above a top cover frame (1), wherein the inlet distributing header (2) and the outlet collecting header (3) are connected therebetween by means of several vertical serpentine heat transfer surface tubes (4), an upper curved portion of each serpentine heat transfer surface tube (4) close to the top cover frame (1) is hung on the top cover frame (1) by means of a support pipe (5), and two ends of the support pipe (5) are connected to the inlet distributing header (2) and the outlet collecting header (3) respectively; a rapping and ash removal mechanism is arranged between each vertical serpentine heat transfer surface tube (4) at a position below a middle location. The heat transfer tube bundle solves problems such as large installation work on a construction site of the heat transfer tube bundle for the flue-type waste heat boiler, a suspension rod of the serpentine heat transfer surface tubes (4) being easy to fall off, and the serious accumulation of ash on the heat transfer surface tubes.

Classes IPC  ?

• F22B 37/10 - Tubes d'eauAccessoires à cet effet
• F23J 3/00 - Enlèvement des résidus solides se trouvant dans les passages ou dans les chambres situés au delà du foyer, p. ex. dans les conduits de fumée par souffleurs de suie

Abrégé

A system for recovering waste heat from pure low temperature flue gas of a cement plant, comprising: a rotary kiln (1), a kiln front clinker cooler (5), and a heated device system (12). The rotary kiln (1) is connected to a kiln rear preheater (2). The kiln rear preheater (2) is connected to a kiln rear waste heat recovery device (3). The kiln front clinker cooler (5) is connected to a kiln front waste heat recovery device (6) by a second dust collector (10.2). The kiln front waste heat recovery device (6) is sequentially connected to a chimney (11) by a third dust collector (10.3) and a second induced draft fan (9.2). The kiln rear waste heat recovery device (3) is internally provided with a kiln rear heat transfer surface assembly (4). The kiln front waste heat recovery device (6) is internally provided with a kiln front heat transfer surface assembly (7) . The kiln rear heat transfer surface assembly (4), the heated device system (12), and the kiln front heat transfer surface assembly (7) are sequentially connected to each other. This system has a simplified structure and reduces costs.

Classes IPC  ?

• F27D 17/00 - Dispositions pour l'utilisation de la chaleur perdueDispositions pour l'utilisation ou pour l'élimination des gaz résiduaires

Abrégé

Provided is a waste heat recovery apparatus for use in a coal gasification device, relating to the technical field of heat supply system apparatuses, and comprising: a waste heat boiler having a vertical structure; a high-parameter system; a self-deoxygenating low-parameter system. A flue gas inlet (9) is formed at an upper end of the waste heat boiler. An ash discharge device is provided at a lower end of the waste heat boiler. The ash discharge device is connected to the waste heat boiler by means of a funnel-shaped ash discharge opening (11). The high-parameter system comprises a high-parameter steam drum (7), a water-cooled section (2), a steam superheater (3), a first evaporator (4), and a second evaporator (5). The self-deoxygenating low-parameter system comprises a low-parameter steam drum (8) and a deoxygenating evaporator (6). A flue gas outlet (10) is provided between the deoxygenating evaporator (6) and the funnel-shaped ash discharge opening (11).

Classes IPC  ?

• F22B 1/18 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un gaz chaud, p. ex. des gaz d'évacuation tels que les gaz d'échappement de moteurs à combustion interne

Abrégé

Disclosed is a cement plant kiln head clinker cooler exhaust gas waste heat superheater, comprising a steel frame and a heat exchange tube box. The heat exchange tube box is mounted on the steel frame, the bottom end of the heat exchange tube box is provided with an inlet flue, and the top end of the heat exchange tube box is provided with an outlet flue; a heat transfer surface is vertically provided inside the heat exchange tube box along the flow direction of flue gas, and the heat transfer surface is a film-type tube; and one side of the heat exchange tube box is provided with an inlet header and an outlet header from top to bottom. The present utility model solves the problems of severe abrasion of the heat transfer surface of the exhaust gas waste heat superheater, easy blocking of ash in the area of the heat transfer surface, and poor sealing of a furnace wall.

Classes IPC  ?

• F27D 17/00 - Dispositions pour l'utilisation de la chaleur perdueDispositions pour l'utilisation ou pour l'élimination des gaz résiduaires

Abrégé

A shell-type waste heat boiler capable of online ash removal comprises a shell (6), a steam drum (1), a front smoke box (4), a rear smoke box (7), and a heat exchange tube (5), wherein the steam drum (1) is located above the shell (6), and is supported by a riser tube (3) and a downcomer tube (2). The bottom of a boiler body of the boiler is supported on a cement pier via three supports. The heat exchange tube (5) is a large-diameter heat exchange tube. A first ash bucket (10) is disposed directly below one side of the bottom of the front smoke box (4) close to a front tube panel. A second ash bucket (13) is disposed directly below one side of the bottom of the rear smoke box (7) close to a rear tube panel. A heavy hammer-type automatic ash discharge valve (12) is mounted at each of the bottom of the first ash bucket (10) and the bottom of the second ash bucket (13). At a tail portion of the boiler, multiple ash removal channel devices of which the number and positions are consistent with the number and the positions of holes on the rear tube panel are arranged at the rear smoke box (7). The waste heat boiler allows ash removal to be performed on a boiler heat exchange tube without affecting normal operation of the boiler.

Classes IPC  ?

• F22B 1/18 - Méthodes de production de vapeur caractérisées par le genre de chauffage par exploitation de l'énergie thermique contenue dans une source chaude la source chaude étant un gaz chaud, p. ex. des gaz d'évacuation tels que les gaz d'échappement de moteurs à combustion interne
• F23J 1/00 - Enlèvement des cendres, mâchefers ou scories des chambres de combustion
• F23J 3/00 - Enlèvement des résidus solides se trouvant dans les passages ou dans les chambres situés au delà du foyer, p. ex. dans les conduits de fumée par souffleurs de suie