CN212841601U - Combustion-supporting air distribution system for reducing NOx in secondary combustion chamber - Google Patents
Combustion-supporting air distribution system for reducing NOx in secondary combustion chamber Download PDFInfo
- Publication number
- CN212841601U CN212841601U CN202021598480.3U CN202021598480U CN212841601U CN 212841601 U CN212841601 U CN 212841601U CN 202021598480 U CN202021598480 U CN 202021598480U CN 212841601 U CN212841601 U CN 212841601U
- Authority
- CN
- China
- Prior art keywords
- combustion
- combustion chamber
- flue gas
- air
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 128
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000003546 flue gas Substances 0.000 claims abstract description 59
- 239000007921 spray Substances 0.000 claims abstract description 24
- 239000000779 smoke Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000004056 waste incineration Methods 0.000 abstract 1
- 229910002089 NOx Inorganic materials 0.000 description 14
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002920 hazardous waste Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Abstract
A combustion air distribution system for reducing NOx in a secondary combustion chamber relates to the technical field of waste incineration. It includes: the second combustion chamber hearth is assembled on the annular air box on the outer wall of the second combustion chamber hearth; a plurality of combustion air spray pipes and a plurality of smoke return pipes which are sequentially assembled on the periphery of the secondary combustion chamber hearth from top to bottom along the radial direction of the secondary combustion chamber hearth; one side of the annular air box is provided with a combustion-supporting air inlet, one end of the combustion-supporting air spray pipe is communicated with the annular air box, and the other end of the combustion-supporting air spray pipe is provided with a combustion-supporting air outlet for communicating the interior of the second combustion chamber hearth; and the upper end and the lower end of the flue gas return pipe are respectively provided with a flue gas return outlet and a flue gas return inlet which are communicated with the interior of the furnace chamber of the secondary combustion chamber, and the flue gas return outlet is sleeved outside the combustion air outlet and is coaxially arranged with the combustion air outlet. By adopting the technical scheme, the oxygen concentration in the combustion air can be effectively reduced, the generation of NOx is reduced, and the combustion air purifier has the advantages of simple structure, reasonable use and low cost.
Description
Technical Field
The utility model relates to a msw incineration technical field, concretely relates to a combustion air distribution system for reducing second combustion chamber NOx.
Background
At present, the incineration process for disposing various hazardous wastes is a popular efficient disposal method in the world, but the disposal of the hazardous wastes by the method has the problem of secondary pollution. NOx is one of strict control indexes of air pollution prevention and control, is one of main factors of acid rain formation, and also has serious influence on human health. Incineration produces NOx, which are nitrogen monoxide (NO) and nitrogen dioxide (NO)2) Wherein the NO content is more than 90%, and further about 1% of nitrous oxide (N)2O). The factors influencing the generation of NOx in the burning process mainly comprise two factors, namely temperature, combustion air oxygen content, and high temperature and high oxygen content in the burning process, which are helpful for the generation of NOx. There is therefore a great need for improvements to existing combustion systems to reduce NOx formation in the secondary combustion chamber.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a combustion air distribution system for reducing two combustion chambers NOx, can effectively reduce the oxygen concentration in the combustion air, reduce NOx's formation, have simple structure simultaneously, use reasonable, advantage with low costs.
In order to achieve the above object, the utility model adopts the following technical scheme: a combustion air distribution system for reducing NOx in a secondary combustion chamber, comprising: the second combustion chamber hearth is assembled on the annular air box on the outer wall of the second combustion chamber hearth; a plurality of combustion air spray pipes and a plurality of smoke return pipes which are sequentially assembled on the periphery of the secondary combustion chamber hearth from top to bottom along the radial direction of the secondary combustion chamber hearth; one side of the annular air box is provided with a combustion-supporting air inlet, one end of the combustion-supporting air spray pipe is communicated with the annular air box, and the other end of the combustion-supporting air spray pipe is provided with a combustion-supporting air outlet for communicating the interior of the second combustion chamber hearth; and the upper end and the lower end of the flue gas back suction pipe are respectively provided with a flue gas back suction outlet and a flue gas back suction inlet which are communicated with the interior of the furnace chamber of the secondary combustion chamber, and the flue gas back suction outlet is sleeved outside the combustion air outlet and is coaxially arranged with the combustion air outlet.
The utility model discloses a further setting, second combustion chamber furnace inner wall still is equipped with refractory material layer.
The utility model discloses a further setting, combustion air spray tube with the flue gas return suction pipe is heat-resisting metal material or carborundum material.
The utility model discloses a further setting, combustion air spray tube with the flue gas resorption pipe is for following two combustion chamber furnace outer wall evenly distributed.
After the technical scheme is adopted, the utility model discloses beneficial effect does:
in the utility model, a smoke resorption pipe is arranged on the inner wall of the combustion chamber furnace of the secondary combustion chamber, the smoke resorption outlet sleeve of the smoke resorption pipe is arranged outside the combustion air outlet of the combustion air spray pipe, high-temperature combustible smoke flows from top to bottom in the combustion chamber furnace of the secondary combustion chamber, when encountering combustion air sprayed from the combustion air outlet, the combustible smoke is fully mixed with the combustion air and burnt out, the combustion air is sprayed out from the combustion air outlet of the combustion air spray pipe at a high speed, the pressure at the combustion air outlet can be reduced, namely, the pressure at the smoke resorption outlet of the smoke resorption pipe can be lower than the pressure at the smoke resorption inlet, therefore, part of smoke can be resorbed through the smoke resorption pipe and sprayed out from the smoke resorption outlet, thereby mixing into the combustion air sprayed from the combustion air outlet, the oxygen concentration in the combustion air is reduced, and the NOx concentration generated during the combustion of the smoke is effectively reduced, need not with the help of any external equipment, overall structure is simple, and is reasonable in utilization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: 1. a second combustion chamber hearth; 2. an annular bellows; 3. a combustion air nozzle; 4. the smoke returns to the suction pipe; 31. a combustion air inlet; 32. a combustion air outlet; 41. a flue gas back suction outlet; 42. a flue gas back suction inlet; 5. a layer of refractory material.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment as required without making a contribution, but all the embodiments are protected by the patent law within the scope of the claims of the present invention.
The embodiment relates to a combustion air distribution system for reducing NOx in a second combustion chamber, which comprises the following components in percentage by weight as shown in figure 1: the secondary combustion chamber hearth 1 is assembled on an annular air box 2 on the outer wall of the secondary combustion chamber hearth 1; a plurality of combustion air spray pipes 3 and a plurality of flue gas return pipes 4 which are sequentially assembled at the periphery of the second combustion chamber hearth 1 from top to bottom along the radial direction of the second combustion chamber hearth 1. One side of the annular air box 2 is provided with a combustion-supporting air inlet 31, one end of the combustion-supporting air spray pipe 3 is communicated with the annular air box 2, and the other end of the combustion-supporting air spray pipe is provided with a combustion-supporting air outlet 32 for communicating the interior of the second combustion chamber hearth 1; and the combustion-supporting air spray pipe 3 is used for spraying combustion-supporting air into the second combustion chamber hearth 1 so as to be mixed with combustible flue gas to ensure that the combustible flue gas is fully combusted.
As shown in fig. 1, the upper and lower ends of the flue gas return pipe 4 are respectively provided with a flue gas return outlet 41 and a flue gas return inlet 42 which are communicated with the interior of the second combustion chamber furnace 1, wherein the flue gas return outlet 41 and the combustion air outlet 32 are arranged on the same plane. Preferably, the flue gas suck-back outlet 41 is sleeved outside the combustion air outlet 32 and is coaxially arranged with the combustion air outlet 32, wherein the flue gas suck-back outlet 41 is annular, when combustible flue gas enters the second combustion chamber hearth 1, the combustible flue gas moves from top to bottom, and when combustion air is rapidly sprayed out from the combustion air spray pipe 3, on one hand, the combustible flue gas and the combustion air are fully mixed, which is beneficial to the full combustion of the combustible flue gas; on the other hand, when the combustion air is ejected from the combustion air outlet 32, the pressure at the combustion air outlet 32 is reduced by the high-speed jet flow, that is, the pressure at the flue gas suck-back outlet 41 of the flue gas suck-back pipe 4 is reduced, because the pressure at the flue gas suck-back outlet 41 of the flue gas suck-back pipe 4 is lower than the pressure at the flue gas suck-back inlet 42, part of the flue gas can be sucked back through the flue gas suck-back pipe 4, because the flue gas suck-back outlet 41 and the combustion air outlet 32 are coaxially arranged, the flue gas is mixed with the combustion air when ejected through the flue gas suck-back outlet 41, thereby reducing the oxygen concentration in the combustion air, and further effectively reducing the concentration of NOx generated during.
In this embodiment, the inner wall of the second combustion chamber hearth 1 is also provided with a refractory material layer 5. The combustion air spray pipe 3 and the flue gas return pipe 4 are made of heat-resistant metal materials or silicon carbide materials. And the flue gas return pipe 4 is sleeved outside the combustion air spray pipe 3 and coaxially arranged with the combustion air spray pipe 3 and the flue gas return pipe 4, wherein the combustion air spray pipe 3 and the flue gas return pipe 4 are uniformly distributed along the outer wall of the combustion chamber furnace 1 of the second combustion chamber, so that the flue gas can be fully mixed with combustible flue gas in the combustion chamber furnace 1 of the second combustion chamber, and the oxygen concentration in the combustion air is comprehensively reduced.
The working principle of the utility model is as follows: in the embodiment, the flue gas return pipe 4 is arranged on the inner wall of the combustion chamber furnace 1 of the second combustion chamber, and the flue gas return outlet 41 of the flue gas return pipe 4 is sleeved outside the combustion air outlet 32 of the combustion air spray pipe 3, so that high-temperature combustible flue gas flows from top to bottom in the combustion chamber furnace 1 of the second combustion chamber, when encountering combustion air sprayed from the combustion air outlet 32, the high-temperature combustible flue gas is fully mixed with the combustion air and burnt out, in the process, the combustion air is sprayed out from the combustion air outlet 32 of the combustion air spray pipe 3 through high-speed jet flow, the pressure at the combustion air outlet 32 is reduced, namely, the pressure at the flue gas return outlet 41 of the flue gas return pipe 4 is lower than the pressure at the flue gas return inlet 42, therefore, part of the flue gas is sucked back through the flue gas return pipe 4 and sprayed out from the flue gas return outlet 41, so that the oxygen concentration in the combustion air sprayed from the combustion air outlet 32, and then effectively reduce the NOx concentration that produces when the flue gas burns, need not with the help of any external equipment, overall structure is simple, and is reasonable in utilization.
The above description is only for the purpose of illustration and not limitation, and other modifications or equivalent replacements made by those skilled in the art to the technical solution of the present invention should be covered by the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. A combustion air distribution system for reducing NOx in a secondary combustion chamber, comprising: the secondary combustion chamber hearth (1) is assembled on an annular air box (2) on the outer wall of the secondary combustion chamber hearth (1); a plurality of combustion-supporting air spray pipes (3) and a plurality of flue gas return pipes (4) which are sequentially assembled on the periphery of the second combustion chamber hearth (1) from top to bottom along the radial direction of the second combustion chamber hearth (1);
a combustion-supporting air inlet (31) is formed in one side of the annular air box (2), one end of the combustion-supporting air spray pipe (3) is communicated with the annular air box (2), and a combustion-supporting air outlet (32) is formed in the other end of the combustion-supporting air spray pipe and is used for being communicated with the interior of the second combustion chamber hearth (1); the upper end and the lower end of the flue gas return pipe (4) are respectively provided with a flue gas return outlet (41) and a flue gas return inlet (42) which are communicated with the interior of the second combustion chamber hearth (1);
the smoke back-suction outlet (41) is sleeved outside the combustion air outlet (32) and is coaxially arranged with the combustion air outlet (32).
2. A combustion air distribution system for reducing NOx in a secondary combustion chamber according to claim 1, characterized in that the inner wall of the furnace (1) of the secondary combustion chamber is further provided with a refractory layer (5).
3. Combustion air distribution system for reducing NOx in the secondary combustion chamber according to claim 1, characterized in that the combustion air nozzles (3) and the flue gas return ducts (4) are of heat-resistant metal material or silicon carbide material.
4. A combustion air distribution system for reducing NOx in the secondary combustion chamber according to claim 1, characterized in that the combustion air nozzles (3) and the flue gas return ducts (4) are uniformly distributed along the outer wall of the furnace (1) of the secondary combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021598480.3U CN212841601U (en) | 2020-08-05 | 2020-08-05 | Combustion-supporting air distribution system for reducing NOx in secondary combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021598480.3U CN212841601U (en) | 2020-08-05 | 2020-08-05 | Combustion-supporting air distribution system for reducing NOx in secondary combustion chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212841601U true CN212841601U (en) | 2021-03-30 |
Family
ID=75128816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021598480.3U Active CN212841601U (en) | 2020-08-05 | 2020-08-05 | Combustion-supporting air distribution system for reducing NOx in secondary combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212841601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834068A (en) * | 2021-09-13 | 2021-12-24 | 浙江天象环境服务有限公司 | Flue gas reflux type cement kiln co-processing high-temperature pretreatment system and method |
-
2020
- 2020-08-05 CN CN202021598480.3U patent/CN212841601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834068A (en) * | 2021-09-13 | 2021-12-24 | 浙江天象环境服务有限公司 | Flue gas reflux type cement kiln co-processing high-temperature pretreatment system and method |
| CN113834068B (en) * | 2021-09-13 | 2024-04-16 | 浙江天象环境服务有限公司 | High-temperature pretreatment system and method for smoke reflux type cement kiln co-treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109458622B (en) | Environment-friendly energy-saving discharge system for incineration of acrylonitrile salt-containing organic waste liquid and waste gas | |
| CN102644922B (en) | Incineration treatment device for nitrogen-containing organic wastes and incineration treatment process | |
| CN202382255U (en) | Incineration device for liquid waste containing salt | |
| CN202012913U (en) | Novel flue gas self-reflux low-oxygen combustor | |
| CN109058979B (en) | Cyclone furnace denitration system and method | |
| CN107559837A (en) | A kind of method of chloride waste liquid, burned waste gas and vent gas treatment | |
| CN107726331B (en) | Wiring board burns smelting furnace and wiring board burns smelting process | |
| CN106402905A (en) | Staged-combustion torch head device | |
| CN107677137B (en) | Energy-saving environment-friendly combustion system of smoke combustion-supporting industrial furnace | |
| CN207122904U (en) | A kind of waste incinerator of low nitrogen burning | |
| CN212841601U (en) | Combustion-supporting air distribution system for reducing NOx in secondary combustion chamber | |
| CN107620962B (en) | A kind of biogas low NO | |
| CN110425548A (en) | Chemical industry saliferous raffinate incineration system and its burning process | |
| CN201083392Y (en) | Discharge gas or waste liquor combusting oven and combustion system comprising same | |
| CN206669750U (en) | Energy-saving plasma dangerous waste disposal system | |
| CN214745872U (en) | Low-nitrogen flame burner and direct-fired heating device for denitration system | |
| CN110296433A (en) | Combustion chamber high temperature burning zone temprature control method and device | |
| CN208750738U (en) | A kind of processing system for burning combined steam overheat | |
| CN202675299U (en) | Device for combusting nitrogen-containing organic wastes | |
| CN209588041U (en) | A kind of cement kiln plasma strengthening spiral flame inspissator | |
| CN210891667U (en) | Domestic waste burns marsh gas utilization equipment of power plant | |
| CN114110618A (en) | Combustion device for treating acrylonitrile wastewater | |
| CN203099852U (en) | Waste gas and waste water incineration treatment device | |
| CN220981352U (en) | Waste gas and waste liquid treatment system | |
| CN205619367U (en) | Industrial boiler fractional combustion after burning wind hangs down nitrogen device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 1118, 11th Floor, Economic Development Building, Zone A, Changdu Economic Development Zone, Tibet Autonomous Region, 854000 Patentee after: Tibet Renze Environmental Technology Co.,Ltd. Address before: No. 2505, 25 / F, building a, chaodu international, 153 nongmo Road, Ruili City, Dehong Dai and Jingpo Autonomous Prefecture, Yunnan Province, 678400 Patentee before: Ruili Hengze Environmental Technology Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huizhou Hanyang Environmental Technology Service Co.,Ltd. Assignor: Tibet Renze Environmental Technology Co.,Ltd. Contract record no.: X2024980002154 Denomination of utility model: A combustion air distribution system for reducing NOx in the secondary combustion chamber Granted publication date: 20210330 License type: Common License Record date: 20240221 |