CN218820413U

CN218820413U - Boiler secondary air or recirculated flue gas distribution device capable of being dredged on line

Info

Publication number: CN218820413U
Application number: CN202222638032.7U
Authority: CN
Inventors: 黎璐霞; 李成林; 刘苏蒙; 陈晗霞; 李靖涛; 裴江; 陈改
Original assignee: Jianglian Heavy Industry Group Co ltd
Current assignee: Jianglian Heavy Industry Group Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-04-07
Anticipated expiration: 2032-10-09

Abstract

The utility model discloses a boiler overgrate air or recirculated flue gas distributor that can dredge on line, including burning the boiler, fixed distribution collection case gallows that is provided with on burning the boiler's the diaphragm type wall, be provided with the distribution collection case on the distribution collection case gallows, the one end of distribution collection case is provided with overgrate air or flue gas recirculation pipe, the entrance of overgrate air or flue gas recirculation pipe is provided with the expansion joint, the other end of distribution collection case is provided with the distributing pipe, the both ends of distributing pipe are a port and b end spout respectively, a port is provided with detachable peeping device, the interior below of a port still is provided with the sweeping subassembly that is used for sweeping peeping device, the utility model discloses be provided with detachable peeping device on the a port of distribution pipe, can inspect at any time whether b end spout cokes and blocks up; and coke blocks blocked at the nozzle at the b end can be removed under the running state of the incineration boiler, the nozzle at the b end is ensured to be smooth, the combustion efficiency can be effectively improved, and the generation of thermal NOx can be inhibited.

Description

Boiler secondary air or recirculated flue gas distribution device capable of being dredged on line

Technical Field

The utility model relates to a boiler overgrate air or flue gas recirculation distribution especially relate to a boiler overgrate air or recirculation flue gas distributor that can dredge on line.

Background

The melting point of fuel ash such as domestic garbage, biomass and the like is low, coking is easy to occur in a high-temperature area of a secondary air and flue gas recirculation nozzle, the nozzle of a distribution pipe is often blocked, the secondary air and the recirculation flue gas cannot be uniformly sprayed into the furnace to participate in combustion, so that the combustion condition is not sensitive to adjustment, the furnace temperature is difficult to adjust through the secondary air and the recirculation flue gas when being too high, the combustion efficiency is reduced, and the original NOx concentration in the flue gas is increased. Coking and blocking of a traditional secondary air or flue gas recirculation distribution system can be realized, and the system can be cleaned and dredged only after furnace shutdown, so that adverse effects are brought to the efficient operation of the incineration boiler. The boiler secondary air or recirculating flue gas distribution system capable of being dredged on line can realize that whether a distribution pipe nozzle is coked or blocked or not is checked in the running state of the boiler and the dredging is carried out. The problem of traditional overgrate air or flue gas recirculation distribution system can't inspect and dredge spout coking jam in the boiler operation is solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the technical problem who exists among the prior art, provide a boiler overgrate air or the recirculated flue gas distributor that can dredge on line.

In order to achieve the above purpose, the utility model provides a technical scheme is: the utility model provides a boiler overgrate air or recirculated flue gas distributor that can dredge on line, includes incineration boiler, fixed distribution collection box gallows that is provided with on incineration boiler's the diaphragm type wall, be provided with the distribution collection box on the distribution collection box gallows, the one end of distribution collection box is provided with overgrate air or flue gas recirculation pipe, the entrance of overgrate air or flue gas recirculation pipe is provided with the expansion joint, the other end of distribution collection box is provided with the distributing pipe, the both ends of distributing pipe are a port and b end spout respectively, b end spout sets up on incineration boiler's the furnace diaphragm type wall, a port is provided with detachable peeping device, the interior below of a port still is provided with and is used for sweeping the subassembly that sweeps of peeping device.

Preferably, the peeping device comprises a concave flange, high-strength heat-resistant glass and a sealing assembly, the concave flange is arranged on the port a, the peeping mirror is arranged on the concave flange, and the sealing assembly is arranged between the concave flange and the peeping mirror.

Preferably, the blowing component comprises a compressed air main pipe, a ball valve and a compressed air distribution pipe, the compressed air main pipe is connected with the compressed air distribution pipe, the ball valve is arranged at the joint of the compressed air main pipe and the compressed air distribution pipe, and the compressed air distribution pipe is connected with the distribution pipe.

Preferably, the compressed air main pipe and the compressed air distribution pipe are made of seamless carbon steel pipes.

Preferably, the secondary air or flue gas recirculation pipe and the distribution header are made of carbon structural steel, the distribution pipe is made of heat-resistant stainless steel, and heat-resistant anticorrosive paint is painted on the inner side and the outer side of the secondary air or flue gas recirculation pipe.

The utility model discloses beneficial effect:

the detachable peeping device is arranged on the port a of the distribution pipe, so that whether the nozzle at the end b is coked and blocked can be checked at any time; and coke blocks blocked at the nozzle at the b end can be removed under the running state of the incineration boiler, the nozzle at the b end is ensured to be smooth, the combustion efficiency can be effectively improved, and the generation of thermal NOx can be inhibited.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention.

Fig. 1 is a schematic diagram of the overall structure of the preferred embodiment of the present invention.

The attached drawings are marked as follows:

1-expansion joint, 2-secondary air or flue gas recirculation pipe, 3-distribution header, 4-distribution pipe, 5-compressed air main pipe, 6-ball valve, 7-compressed air distribution pipe, 8-incineration boiler, 9-b end nozzle and 10-a port.

Detailed Description

This section will describe in detail the embodiments of the present invention, the preferred embodiments of which are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can visually and vividly understand each technical feature and the whole technical solution of the present invention, but it cannot be understood as a limitation to the scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

Referring to fig. 1, in a preferred embodiment of the present invention, a boiler secondary air or recirculated flue gas distribution device capable of being dredged online includes an incineration boiler 8, a membrane wall of the incineration boiler 8 is fixedly provided with a distribution header support hanger, a distribution header 3 is provided on the distribution header support hanger, one end of the distribution header 3 is provided with a secondary air or flue gas recirculation pipe 2, an expansion joint 1 is provided at an inlet of the secondary air or flue gas recirculation pipe 2, the other end of the distribution header 3 is provided with a distribution pipe 4, two ends of the distribution pipe 4 are respectively an a port 10 and a b port 9, the b port 9 is provided on the membrane wall of a furnace of the incineration boiler 8, the b port 9 is a secondary air or recirculated flue gas, and the expansion joint 1 is used for compensating for thermal expansion chamber difference, thereby ensuring that the b port 9 fixed on the membrane wall of the furnace can freely expand along with the membrane wall; damage caused by overlarge expansion difference can be effectively avoided; the port a 10 is provided with a detachable peeping device, and a purging component for purging the peeping device is further arranged at the inner lower part of the port a 10.

The detachable peeping device is arranged on the port a 10 of the distributing pipe 4 of the utility model, so that whether the nozzle 9 at the end b is coked and blocked can be checked at any time; and coke blocks blocked at the nozzle 9 at the b end can be removed in the running state of the incineration boiler 8, so that the nozzle 9 at the b end is ensured to be smooth, the combustion efficiency can be effectively improved, and the generation of thermal NOx can be inhibited.

As a preferred embodiment of the present invention, it may also have the following additional technical features:

in the embodiment, the peeping device consists of a concave flange, a sight glass and a sealing assembly, wherein the sight glass is made of high-strength heat-resistant glass; the concave flange is arranged on the port a 10, a sight glass is arranged on the concave flange, the sealing component is arranged between the concave flange and the sight glass, the sealing component is preferably a heat-resistant sealing ring, and the utility model can check whether a spout 9 at the end b is coked or not from the sight glass of the port a 10; if the nozzle 9 at the end b is coked and blocked, the peeping device at the port a 10 can be opened to remove coke blocks and dredge the nozzle 9 at the end b.

In this embodiment, the subassembly that sweeps includes female pipe 5 of compressed air, ball valve 6 and compressed air distributing pipe 7, female pipe 5 of compressed air with compressed air distributing pipe 7 is connected, ball valve 6 sets up female pipe 5 of compressed air with the junction of compressed air distributing pipe 7, compressed air distributing pipe 7 with distributing pipe 4 is connected.

Specifically, the compressed air of the a port 10 of access distributing pipe 4 is used for sweeping the peeping device, sweep and pass through ball valve 6 control on the compressed air distributing pipe 7 with compressed air, the compressed air of access compressed air distributing pipe 7 gets into distributing pipe 4 perpendicularly, the compressed air pressure that gets into distributing pipe 4 drops fast expansion sharply, thereby play the effect of sweeping the peeping device, be used for preventing the inside deposition of peeping device, it is inside clean to keep peeping the device, and play the effect that the device temperature was peeped in the cooling reduction, and simultaneously, sweep the air curtain that forms with compressed air when dredging on line and can prevent 8 interior malleation flue gas refluences of incineration boiler.

In this embodiment, the compressed air main pipe 5 and the compressed air distribution pipes 7 are made of seamless carbon steel pipes.

In this embodiment, the secondary air or flue gas recirculation pipe 2 and the distribution header 3 are made of carbon structural steel, the distribution pipe 4 is made of heat-resistant stainless steel and is used for meeting the high-temperature use requirement, and heat-resistant anticorrosive paint is coated on the inner side and the outer side of the secondary air or flue gas recirculation pipe 2.

The utility model discloses the theory of operation: the utility model discloses a be used for distributing overgrate air or recirculated flue gas and spout it into the boiler in, belong to boiler overgrate air or flue gas recirculation distribution technical field, it is concrete, overgrate air or recirculated flue gas pass through expansion joint 1, overgrate air or flue gas recirculation pipe 2 and get into distribution collection case 3, spout into through distributing pipe 4 and burn 8 hearths of incineration boiler and the mixed participation of flue gas, the peeping device of the a port 10 of distributing pipe 4 is used for the inspection and dredges the problem of the 9 coking of b end spout, ensures even air distribution, can effectively improve combustion efficiency, and the subassembly that sweeps of below in the a port 10 is used for sweeping the peeping device sweeps the gas curtain that forms with compressed air when the on-line mediation and can prevent 8 interior malleation flue gas blowbacks of incineration boiler.

The utility model can check whether the nozzle 9 at the end b is coked and blocked at any time through the peeping device at the end a 10 of the distributing pipe 4; if the nozzle 9 at the b end is coked and blocked, the peeping device at the port a 10 can be opened to remove coke blocks, the nozzle 9 at the b end is dredged, and the peeping device which can be detached from the port a 10 of the distribution pipe 4 can remove the coke blocks blocked at the nozzle 9 at the b end in the running state of the incineration boiler 8, so that the nozzle 9 at the b end is ensured to be unblocked; the nozzle 9 at the b end is unblocked, secondary air or recycled flue gas can be sprayed into the incineration boiler 8 more uniformly and is fully mixed with high-temperature flue gas in the nozzle area of the secondary air or the recycled flue gas, the flue gas temperature and the oxygen concentration in the area are uniformly reduced, the effect of inhibiting thermal NOx is achieved, and combustible substances which are not completely combusted in the flue gas can be in contact with combustion-supporting air more fully, so that the full combustion of fuel is facilitated, and the combustion efficiency is improved.

The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.

The above is only the preferred embodiment of the present invention, as long as the technical solution of the purpose of the present invention is realized by the substantially same means, all belong to the protection scope of the present invention.

Claims

1. The utility model provides a boiler overgrate air or recirculated flue gas distributor that can dredge on line which characterized in that: including incineration boiler (8), the fixed distribution header gallows that is provided with on the diaphragm type wall of incineration boiler (8), be provided with distribution header (3) on the distribution header gallows, the one end of distribution header (3) is provided with overgrate air or flue gas recirculation pipe (2), the entrance of overgrate air or flue gas recirculation pipe (2) is provided with expansion joint (1), the other end of distribution header (3) is provided with distributing pipe (4), the both ends of distributing pipe (4) are a port (10) and b end spout (9) respectively, b end spout (9) set up on the furnace wall of incineration diaphragm type boiler (8), a port (10) are provided with detachable peeps the device, the interior below of a port (10) still is provided with and is used for sweeping the subassembly that sweeps of peeping the device.

2. An on-line uncloggable boiler secondary air or recirculated flue gas distribution device according to claim 1, characterized in that: the peeping device comprises a concave flange, high-strength heat-resistant glass and a sealing assembly, wherein the concave flange is arranged on the port a (10), a peeping mirror is arranged on the concave flange, and the sealing assembly is arranged between the concave flange and the peeping mirror.

3. An on-line uncloggable boiler secondary air or recirculated flue gas distribution device according to claim 1, characterized in that: the blowing component comprises a compressed air main pipe (5), a ball valve (6) and a compressed air distribution pipe (7), the compressed air main pipe (5) is connected with the compressed air distribution pipe (7), the ball valve (6) is arranged at the joint of the compressed air main pipe (5) and the compressed air distribution pipe (7), and the compressed air distribution pipe (7) is connected with the distribution pipe (4).

4. An on-line uncloggable boiler secondary air or recirculated flue gas distribution device according to claim 3, characterized in that: the compressed air main pipe (5) and the compressed air distribution pipe (7) are made of seamless carbon steel pipes.

5. An on-line uncloggable boiler secondary air or recirculated flue gas distribution device according to claim 1, characterized in that: the secondary air or flue gas recirculation pipe (2) and the distribution header (3) are made of carbon structural steel, the distribution pipe (4) is made of heat-resistant stainless steel, and heat-resistant anticorrosive paint is painted on the inner side and the outer side of the secondary air or flue gas recirculation pipe (2).