CN209024591U - Reduce the radiant tube exhaust system of discharged nitrous oxides - Google Patents
Reduce the radiant tube exhaust system of discharged nitrous oxides Download PDFInfo
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- CN209024591U CN209024591U CN201821609803.7U CN201821609803U CN209024591U CN 209024591 U CN209024591 U CN 209024591U CN 201821609803 U CN201821609803 U CN 201821609803U CN 209024591 U CN209024591 U CN 209024591U
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- radiant tube
- stage
- flue gas
- stage catalytic
- nitrous oxides
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Abstract
The purpose of the utility model is to provide a kind of radiant tube exhaust systems for reducing discharged nitrous oxides, including heat exchanger, two-stage catalytic room, smoke exhaust fan, chimney, radiant tube and the low NO of radiant tube to matchXBurner, the exhanst gas outlet of radiant tube successively connects with heat exchanger, two-stage catalytic room, smoke exhaust fan and chimney by discharge tube, and upstream is equipped with for by the CO and NO catalysis reaction generation N in flue gas in two-stage catalytic room2And CO2One stage catalyzing dose, middle reaches be circumscribed with the air pipeline for mixing air, downstream be equipped with for CO remaining in flue gas carry out catalysis burning second catalyst.Combustion process is dropped NO by the utility modelXDrop NO is reacted with catalysisXIn conjunction with two-stage reduces NO in flue gasXContent, NOXContent can reduce to extremely low level, greatly reduce equipment cost.
Description
Technical field
The utility model belongs to industrial gasses pollutant emission control field, and in particular to a kind of reduction discharged nitrous oxides
Radiant tube exhaust system.
Background technique
Nitrogen oxides (NOx) is to cause one of primary pollution source for the source of atmospheric pollution, can be to human body, animal or plant
Object causes intoxicating and detrimental effect, while being also one of acid rain, acid mist and main reason of photochemical fog, studies and administers
Discharged nitrous oxides are also a Main way in international pollution control field.
Currently, on Large Scale and Continuous strip heat-treatment furnace, to realize technique requirement while guaranteeing product quality, using radiation
Pipe carry out indirect heating using more and more, every set radiant tube has the radiation pipe burner tip to match, and radiation pipe burner tip is general
By burning and exchanging heat, two parts are formed, and combustion parts are responsible for tissue combustion gas and air realizes completely burned, and heat exchanging part is to spoke
It penetrates pipe discharge exhaust gas and carries out waste heat recycling, preheated burning gas.Radiation pipe burner tip burning belongs to restricted area burning, due to having a surplus
Recuperation of heat requires (usual radiation pipe burner tip air preheating temperature can reach 450 DEG C -550 DEG C), while radiant tube application furnace temperature
Higher (900-1050 DEG C), radiation combustion inner pipe temperature can reach close to 1200 DEG C, easily generation local high temperature zone, accelerate nitrogen oxygen
The generation of compound, therefore, in the case where country is increasingly stringenter discharged nitrous oxides index request, using adding for radiant tube
Hot stove discharged nitrous oxides are up to standard very difficult.
Utility model content
The purpose of the utility model is to provide a kind of radiant tube exhaust system for reducing discharged nitrous oxides, the utility model
NO is dropped into combustion processxDrop NO is reacted with catalysisxIn conjunction with two-stage reduces NO in flue gasxContent, NOxContent can reduce to extremely low
Level greatly reduces equipment cost.
The technical scheme adopted by the utility model is
It is a kind of reduce discharged nitrous oxides radiant tube exhaust system, including heat exchanger, two-stage catalytic room, smoke exhaust fan,
Chimney, radiant tube and the low NO of radiant tube to matchxBurner, the exhanst gas outlet of radiant tube by discharge tube successively with heat exchange
Device, two-stage catalytic room, smoke exhaust fan are connected with chimney, in two-stage catalytic room upstream be equipped with for by flue gas CO and NO be catalyzed
Reaction generates N2And CO2One stage catalyzing dose, middle reaches are circumscribed with air pipeline for mixing air, downstream is equipped with for cigarette
Remaining CO carries out the second catalyst of catalysis burning in gas.
Further, NO low with radiant tubexIt is respectively equipped in the air supply pipe and fuel gas supply conduit of burner connection
Air flow valve and gas flow valve.
Further, the detection for temperature, pressure and flow for further including control device and being located on discharge tube
Mechanism, control device NO low with testing agency, two-stage catalytic room and radiant tube respectivelyxBurner connection.
The utility model has the beneficial effects that
Combustion process is dropped NO by the utility modelxDrop NO is reacted with catalysisxIn conjunction with two-stage reduces NO in flue gasxContent, NOx
Content can reduce to extremely low level, greatly reduce equipment cost.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model embodiment.
In figure: 1- radiant tube and the low NO of the radiant tube to matchxBurner；2- heat exchanger；3- two-stage catalytic room；4- level-one is urged
Agent；5- air pipeline；6- second catalyst；7- smoke exhaust fan；8- chimney；9- control device.
Specific embodiment
The utility model is further described with embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of radiant tube exhaust system for reducing discharged nitrous oxides, including heat exchanger 2, two-stage catalytic room
3, smoke exhaust fan 7, chimney 8, radiant tube and the low NO of radiant tube to matchxThe exhanst gas outlet of burner 1, radiant tube passes through delivery pipe
Road is successively connect with heat exchanger 2, two-stage catalytic room 3, smoke exhaust fan 7 and chimney 8, and upstream is equipped with for inciting somebody to action in two-stage catalytic room 3
CO and NO catalysis reaction in flue gas generate N2And CO2One stage catalyzing dose 4, middle reaches be circumscribed with the air hose for mixing air
Road 5, downstream are equipped with the second catalyst 6 for carrying out catalysis burning to CO remaining in flue gas.The principles of the present invention are:
The radiation pipe burner tip that radiant tube matches is the low NO of radiant tubexBurner, the flue gas that radiant tube generates first pass through the low NO of radiant tubexIt burns
The included heat exchanger of mouth completes a waste heat recycling, secondary waste heat recycling is completed using external heat exchanger 2, using level-one
Catalyst 4 makes CO and NO the catalysis reaction in flue gas generate N2And CO2, it is implemented as the disposable removal to NO, then empty in incorporation
By second catalyst 6 after gas, makes remaining CO catalysis burning in flue gas, be discharged into greatly finally by smoke exhaust fan 7 and chimney 8
Gas.Combustion process is dropped NO by the utility modelxDrop NO is reacted with catalysisxIn conjunction with two-stage reduces NO in flue gasxContent, NOxContent
It can reduce to extremely low level, greatly reduce equipment cost.
In the present embodiment, NO low with radiant tubexIn the air supply pipe and fuel gas supply conduit of burner connection respectively
Equipped with air flow valve and gas flow valve.To being passed through the low NO of radiant tubexThe air of burner and combustion gas carry out burden control, guarantee
Residual oxygen value and CO value are horizontal in setting in the flue gas that burning generates.
As shown in Figure 1, in the present embodiment, further include control device 9 and be located on discharge tube for temperature, pressure
The testing agency of power and flow, the NO low with testing agency, two-stage catalytic room 3 and radiant tube respectively of control device 9xBurner connection.
Temperature, pressure and flow detection are carried out to the flue gas that burning generates, to realize the control to combustion process and two-stage catalytic process
System.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (3)
1. it is a kind of reduce discharged nitrous oxides radiant tube exhaust system, it is characterised in that: including heat exchanger, two-stage catalytic room,
Smoke exhaust fan, chimney, radiant tube and the low NO of radiant tube to matchxBurner, the exhanst gas outlet of radiant tube by discharge tube according to
Secondary to connect with heat exchanger, two-stage catalytic room, smoke exhaust fan and chimney, upstream is equipped with for by the CO in flue gas in two-stage catalytic room
Reaction, which is catalyzed, with NO generates N2And CO2One stage catalyzing dose, middle reaches are circumscribed with air pipeline for mixing air, downstream is equipped with
For carrying out the second catalyst of catalysis burning to CO remaining in flue gas.
2. reducing the radiant tube exhaust system of discharged nitrous oxides as described in claim 1, it is characterised in that: low with radiant tube
NOxAir flow valve and gas flow valve are respectively equipped in the air supply pipe and fuel gas supply conduit of burner connection.
3. reducing the radiant tube exhaust system of discharged nitrous oxides as described in claim 1, it is characterised in that: further include control
Device and be located on discharge tube for temperature, pressure and flow testing agency, control device respectively with testing agency,
Two-stage catalytic room and the low NO of radiant tubexBurner connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821609803.7U CN209024591U (en) | 2018-09-29 | 2018-09-29 | Reduce the radiant tube exhaust system of discharged nitrous oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821609803.7U CN209024591U (en) | 2018-09-29 | 2018-09-29 | Reduce the radiant tube exhaust system of discharged nitrous oxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209024591U true CN209024591U (en) | 2019-06-25 |
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ID=66905483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821609803.7U Active CN209024591U (en) | 2018-09-29 | 2018-09-29 | Reduce the radiant tube exhaust system of discharged nitrous oxides |
Country Status (1)
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| CN (1) | CN209024591U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338052A (en) * | 2018-09-29 | 2019-02-15 | 中冶南方（武汉）热工有限公司 | Reduce the radiant tube exhaust system and method for discharged nitrous oxides |
-
2018
- 2018-09-29 CN CN201821609803.7U patent/CN209024591U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338052A (en) * | 2018-09-29 | 2019-02-15 | 中冶南方（武汉）热工有限公司 | Reduce the radiant tube exhaust system and method for discharged nitrous oxides |
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