CN216431736U

CN216431736U - Flue gas oxygenating system with deodorization function

Info

Publication number: CN216431736U
Application number: CN202121557579.3U
Authority: CN
Inventors: 徐刚; 王进; 朱真真; 王沛丽
Original assignee: Everbright Envirotech China Ltd; Everbright Environmental Protection Research Institute Nanjing Co Ltd; Everbright Environmental Protection Technology Research Institute Shenzhen Co Ltd
Current assignee: Everbright Envirotech China Ltd; Everbright Environmental Protection Research Institute Nanjing Co Ltd; Everbright Environmental Protection Technology Research Institute Shenzhen Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2022-05-03
Anticipated expiration: 2031-07-09

Abstract

The utility model provides a smoke oxygenating system with a deodorization function, which comprises: the garbage incineration boiler comprises a garbage incineration boiler body, a fly ash bin and an independent air system, wherein the independent air system comprises an air suction pipeline unit, the input end of the air suction pipeline unit is communicated with the fly ash bin, and the output end of the air suction pipeline unit is communicated with the boiler wall of the garbage incineration boiler body. The utility model directly introduces the air in the fly ash bin into the hearth without blowing by using a primary air fan, thereby reducing the energy consumption of the primary air fan, solving the problem of deodorization of the fly ash bin by the odor extracted from the fly ash bin and avoiding adding additional deodorization equipment.

Description

Flue gas oxygenating system with deodorization function

Technical Field

The utility model belongs to the technical field of boiler oxygen supplementation, and particularly relates to a flue gas oxygen supplementation system with a deodorization function.

Background

Incinerator incineration treatment is a widely used garbage treatment technology at present, can realize recycling and reduction, and simultaneously has the problem of pollutant emission control. Especially NOx has a bad influence on the environment and NOx pollutant control is essential. Flue gas recirculation is a low-nitrogen combustion technology, and a part of low-temperature flue gas is extracted from a smoke outlet of a boiler and is directly fed into the boiler, so that the combustion temperature can be reduced, the oxygen concentration is also reduced, and the emission concentration of NOx is further reduced.

However, in the prior art, during the process of adopting the flue gas recirculation technology, the carbon monoxide value may be increased instantaneously due to low-oxygen combustion, and at this time, the oxygen supplement can be performed only by increasing air in a primary air increasing manner, so that the energy consumption of the primary air fan is increased by the method.

Disclosure of Invention

The utility model aims to provide a flue gas oxygen supplementing system with a deodorization function, which integrates automatic oxygen supplementing and deodorization functions, does not need to additionally increase deodorization air equipment, does not change a secondary air and recirculation air system, and further reduces the energy consumption of a primary air fan and the cost of deodorization air. The technical scheme adopted by the utility model is as follows:

a flue gas oxygenating system with a deodorization function comprises:

a waste incineration boiler;

fly ash bin;

and the independent air system comprises an air suction pipeline unit, wherein the input end of the air suction pipeline unit is communicated with the fly ash bin, and the output end of the air suction pipeline unit is communicated with the furnace wall of the waste incineration boiler.

Preferably, the air suction pipeline unit comprises a main pipeline, and an air supplementing fan is arranged on the main pipeline.

Preferably, the exhaust duct unit further comprises a furnace side communication duct, and the furnace side communication duct is communicated with the output end of the main duct; one end of the furnace side communication pipeline is communicated with a front wall header pipeline, and the other end of the furnace side communication pipeline is communicated with a rear wall header pipeline;

the front wall header pipeline is welded and communicated with the front wall nozzle, and the rear wall header pipeline is welded and communicated with the rear wall nozzle; and each front wall nozzle and each rear wall nozzle are communicated with the furnace wall.

Preferably, the furnace wall is provided with a front air inlet matched with the front wall nozzle; a rear air inlet matched with the rear wall nozzle is formed in the furnace wall; the front wall nozzles and the rear wall nozzles are welded on the furnace wall.

Preferably, the independent air system further comprises a flow meter, and the flow meter is arranged on the main pipeline and is positioned between the air supplementing fan and the fly ash bin.

Preferably, the independent air system further comprises a pressure meter and an oxygen meter, and the pressure meter and the oxygen meter are both positioned on the main pipeline; the pressure gauge and the oxygen gauge are both arranged between the waste incineration boiler and the air supply fan.

Preferably, an air inlet electric valve and an air outlet electric valve are arranged on the main pipeline.

Compared with the prior art, the utility model has the advantages that:

(1) air in the fly ash bin is directly introduced into the hearth without blowing by using a secondary air fan, so that the energy consumption of the secondary air fan is reduced, the odor extracted from the fly ash bin solves the problem of deodorization of the fly ash bin, and additional deodorization equipment is not required.

(2) The odor of the fly ash bin contains reductive ammonia gas, and the reductive ammonia gas is sent into the hearth to further provide reductive atmosphere, so that nitrogen oxides are reduced, and the emission of the nitrogen oxides is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a smoke oxygenating system with a deodorizing function according to an embodiment of the present invention;

fig. 2 is a schematic connection diagram of the front wall header pipes, the rear wall header pipes and the main pipe in fig. 1.

The system comprises a horn-shaped suction pipe, a main pipeline, a 3-electric valve, a 4-flowmeter, a 5-air supplementing fan, a 6-pressure gauge, a 7-oxygen meter, an 8-front wall header pipeline, a 9-front wall nozzle, a 10-rear wall header pipeline, a 11-rear wall nozzle and a 12-furnace side communicating pipeline.

Detailed Description

The present invention will now be described in more detail with reference to the accompanying schematic drawings, in which preferred embodiments of the utility model are shown, it being understood that one skilled in the art may modify the utility model herein described while still achieving the advantageous effects of the utility model. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the utility model.

As shown in fig. 1 to 2, a flue gas oxygenating system with deodorization function includes: a garbage incineration boiler,

Fly ash storehouse and independent wind system. The independent air system is used for introducing air in the fly ash bin into a hearth (combustion area) of the waste incineration boiler so as to perform oxygen supplementation operation on the waste incineration boiler. It is known to those skilled in the art that the furnace wall is part of the furnace.

Wherein, the fly ash bin is a warehouse which is specially used for storing and treating fly ash generated by incineration in a waste incineration plant. As the fly ash is an inevitable product of waste incineration, the fly ash accounts for about 3-5% of the total waste amount. The air (odor) in the fly ash bin contains oxygen and reducing ammonia.

The independent air system comprises an air suction pipeline unit, and a flow meter 4, a pressure gauge 6, an oxygen gauge 7, an air inlet electric valve and an air outlet electric valve which are arranged on the air suction pipeline unit. Wherein, the input end of the air draft pipeline unit is communicated with the fly ash bin, and the output end is communicated with the furnace wall of the waste incineration boiler.

Specifically, the draft duct unit includes a main duct 2, a furnace-side communication duct 12, a front wall header duct 8, a front wall nozzle 9, a rear wall header duct 10, and a rear wall nozzle 11.

An air inlet electric valve, a flow meter 4, an air supply fan 5, a pressure gauge 6, an oxygen meter 7 and an air outlet electric valve are sequentially arranged on the main pipeline 2; the air inlet electric valve is arranged close to the fly ash bin. Further, a horn-shaped suction pipe 1 is arranged at the input end of the main pipeline 2. Wherein, the effect of tonifying wind fan 5 is: after the gas in the fly ash bin is introduced into the main pipeline 2, the other part of the fly ash bin is pressurized, so that the part of the gas is smoothly introduced into the hearth. The air supplementing fan 5 can be controlled in a frequency modulation mode to input the air quantity of the hearth, and an independent air system can be started and stopped by the two electric valves 3; the quality of the gas input into the hearth is monitored through the flowmeter 4, the pressure gauge 6 and the oxygen gauge 7, and the problem of pipeline gas leakage exists during detection.

The middle section of the furnace side communication pipeline 12 is welded to the main pipeline 2, and the middle section of the furnace side communication pipeline 12 is communicated with the output end of the main pipeline 2; one end of the furnace side communication pipe 12 is communicated with the front wall header pipe 8, and the other end is communicated with the rear wall header pipe 10. In the present embodiment, the furnace-side communication pipe 12 is designed in a U-shape for easy arrangement so that the furnace-side communication pipe 12 is arranged on the left or right side of the waste incineration boiler. In this embodiment, a furnace wall of the waste incineration boiler near the fly ash bin is a rear wall. As shown in fig. 1, the furnace-side communication pipe 12 is provided on the left side of the waste incineration boiler, and the front wall header pipe 8 and the rear wall header pipe 10 are arranged in a direction perpendicular to the paper surface, i.e., extending from the left side of the waste incineration boiler toward the right side thereof. Thus, the front wall header pipes 8 and the rear wall header pipes 10 are each shaped in cross-section in fig. 1. In other embodiments than this embodiment, the furnace-side communication duct 12 may have other shapes.

The front wall header pipeline 8 is welded and communicated with a front wall nozzle 9, and the rear wall header pipeline 10 is welded and communicated with a rear wall nozzle 11; each front wall nozzle 9 and each rear wall nozzle 11 are communicated with the furnace wall. Specifically, the furnace wall is provided with a front air hole matched with the front wall nozzle 9 and a rear air hole matched with the rear wall nozzle 11, and the front wall nozzle 9 and the rear wall nozzle 11 are both welded on the furnace wall. That is, each front wall nozzle 9 corresponds to one front air inlet, and each rear wall nozzle 11 corresponds to one rear air inlet. Preferably, the front wall header pipes 8 and the rear wall header pipes 10 are all closed at the ends thereof remote from the main pipe 2.

In the prior art, the fly ash stabilizing rooms are arranged in waste incineration plants for fly ash chelation, but certain gas is generated in the fly ash and chelation process, so that higher irritant gas exists among the fly ash. The fly ash generated by incineration has high pollution and foul gas, and a warehouse of a garbage incineration plant is specially used for storing and treating the fly ash generated by incineration. The utility model directly utilizes the air in the fly ash bin to supplement oxygen for the waste incineration boiler, thereby solving the problem of deodorization of the fly ash bin and needing no additional deodorization equipment.

The working principle of the utility model is as follows:

after air in the fly ash bin is sequentially introduced into the main pipeline 2 and the furnace side communication pipeline 12, one part of air enters the front wall header pipeline 8, the other part of air enters the rear wall header pipeline 10, the air entering the front wall header pipeline 8 enters the hearth through the front wall nozzle 9, and the air entering the rear wall header pipeline 10 enters the hearth through the rear wall nozzle 11. From this, this independent air system is direct to introduce the air in the fly ash storehouse to furnace, need not to utilize the overgrate air fan to blast air, has reduced the energy consumption of overgrate air fan from this, and has solved fly ash storehouse deodorization problem from the foul smell of fly ash storehouse extraction, need not to increase extra deodorization gas equipment.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A flue gas oxygenating system with a deodorization function is characterized by comprising:

a waste incineration boiler;

fly ash bin;

2. The system of claim 1, wherein the suction duct unit comprises a main duct, and the main duct is provided with an air supply fan.

3. The system of claim 2, wherein the exhaust duct unit further comprises a furnace side communication duct, the furnace side communication duct communicating with the output end of the main duct; one end of the furnace side communication pipeline is communicated with a front wall header pipeline, and the other end of the furnace side communication pipeline is communicated with a rear wall header pipeline;

4. The system of claim 3, wherein the furnace wall is provided with front air holes matched with the front wall nozzles; a rear air inlet matched with the rear wall nozzle is formed in the furnace wall; the front wall nozzles and the rear wall nozzles are welded on the furnace wall.

5. The system of claim 2, further comprising a flow meter disposed on the main pipe and located between the air supply fan and the fly ash bin.

6. The flue gas oxygenating system with a deodorizing function according to claim 2, wherein the independent air system further comprises a pressure gauge and an oxygen gauge, both of which are located on the main pipe; the pressure gauge and the oxygen gauge are both arranged between the waste incineration boiler and the air supply fan.

7. The system of claim 2, wherein the main pipe is provided with an inlet electric valve and an outlet electric valve.