CN206398703U - A kind of flue gas recirculation device - Google Patents
A kind of flue gas recirculation device Download PDFInfo
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- CN206398703U CN206398703U CN201720031795.1U CN201720031795U CN206398703U CN 206398703 U CN206398703 U CN 206398703U CN 201720031795 U CN201720031795 U CN 201720031795U CN 206398703 U CN206398703 U CN 206398703U
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- flue gas
- gas recirculation
- boiler
- burner
- recirculation pipeline
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Abstract
The utility model is related to field of boilers, more particularly to a kind of flue gas recirculation device.Including being provided with flue gas recirculation pipeline between burner and boiler nozzle, described flue gas recirculation pipeline one end is through the boiler nozzle and is fixedly installed on the boiler nozzle, and the flue gas recirculation pipeline other end is connected with the burner.When boiler works, the flue gas that boiler tail is produced relies on the negative-pressure sucking that burner blower fan is produced, flue gas enters from flue gas recirculation pipeline in one end of boiler nozzle, the flue gas of return is sprayed into burner hearth again after being burned the suction of device blower fan with ozone and fuel, because of a part of backflow flue gas that adulterates, it also limit the oxygen content in burner hearth, the burning being under a kind of hypoxia in burner hearth, ignition temperature is decreased, the nitrous oxides concentration that boiler produces flue gas is also decreased, and reaches the emission request of national environmental standard.
Description
Technical field
The utility model is related to field of boilers, more particularly to a kind of flue gas recirculation device.
Background technology
At present, conventional gas fired-boiler burns completely under normal circumstances, nitrogen oxides (NOx) concentration in boiler smoke
It is all higher, typically in 120~150mg/Nm3.The raising realized with national environmental protection, reduction pollution turns into main target.
PM2.5 is the principal element for causing haze, and concentration and the PM2.5 of nitrogen oxides, which have, directly to be contacted, the concentration of nitrogen oxides
Higher, PM2.5 value is bigger, easier formation haze.As can be seen here, the nitrous oxides concentration gesture in reduction boiler smoke exists
It must go.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of flue gas recirculation device, solves oxynitrides row
Put the problem of concentration is high.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of flue gas recirculation device, including burning
Flue gas recirculation pipeline is provided between device and boiler nozzle, described flue gas recirculation pipeline one end passes through the boiler smoke
Mouthful and be fixedly installed on the boiler nozzle, the flue gas recirculation pipeline other end is connected with the burner.
Further, flue gas concentration detection part and flue gas input control unit are provided with the flue gas recirculation pipeline,
The flue gas concentration detection part is arranged on the boiler nozzle, and the flue gas input control unit is arranged on the flue gas
On recirculation conduit, the flue gas concentration detection part is connected with the flue gas input control unit signal.
Further, the flue gas concentration detection part is popped one's head in for flue gas analysis.
Further, the flue gas input control unit includes flue gas control valve and boiler implosion cabinet, the flue gas control valve
It is connected with the boiler implosion cabinet by control line, the flue gas concentration detection part is connected with the boiler implosion cabinet signal.
Further, at least one flange is provided with the flue gas recirculation pipeline, the flange is set in the flue gas
On recirculation conduit, the flange outer surface is fixedly connected with boiler shell.
Further, the flange is provided with two, and two flanges are respectively sleeved at before the flue gas recirculation pipeline
Two ends afterwards.
The utility model provides a kind of flue gas recirculation device, including flue gas is provided between burner and boiler nozzle
Recirculation conduit, described flue gas recirculation pipeline one end is through the boiler nozzle and is fixedly installed on the boiler nozzle
On, the flue gas recirculation pipeline other end is connected with the burner.Because being set between burner and boiler nozzle
Flue gas recirculation pipeline, and flue gas recirculation pipeline one end is through boiler nozzle and is fixedly installed on boiler nozzle,
The flue gas recirculation pipeline other end is connected with the burner, so, when boiler works, and the flue gas that boiler tail is produced is relied on
The negative-pressure sucking that burner blower fan is produced, flue gas enters from flue gas recirculation pipeline in one end of boiler nozzle, the cigarette of return
Gas is sprayed into burner hearth again after being burned the suction of device blower fan with ozone and fuel, because of a part of backflow flue gas that adulterates,
The burning being under a kind of hypoxia in the oxygen content in burner hearth, burner hearth is limited, ignition temperature is decreased, boiler
The nitrous oxides concentration for producing flue gas is also decreased, and reaches the emission request of national environmental standard.Flue gas of the present utility model
EGR this have the advantage that in terms of existing technologies：Nitrous oxides concentration effectively in reduction flue gas, meets state
The emission request of family's environmental protection standard.
Brief description of the drawings
Fig. 1 is the overall structure diagram of flue gas recirculation device of the present utility model；
Fig. 2 is the flue gas recirculation Pipe installing position view of flue gas recirculation device of the present utility model.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, flue gas recirculation pipeline, 2, burner, 3, boiler nozzle, 4, flue gas analysis probe, 5, flue gas control valve, 6,
Boiler implosion cabinet.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
As Figure 1-Figure 2, the utility model provides a kind of flue gas recirculation device, including burner 2 and boiler smoke
Flue gas recirculation pipeline 1 is provided between mouth 3, described one end of flue gas recirculation pipeline 1 is through the boiler nozzle 3 and fixes
It is arranged on the boiler nozzle 3, the other end of flue gas recirculation pipeline 1 is connected with the burner 2.Because in burning
Flue gas recirculation pipeline 1 is set between device 2 and boiler nozzle 3, and the one end of flue gas recirculation pipeline 1 passes through boiler nozzle
3 and it is fixedly installed on boiler nozzle 3, the other end of flue gas recirculation pipeline 1 is connected with the burner 2, so, works as boiler
During work, the flue gas that boiler tail is produced relies on the negative-pressure sucking that the blower fan of burner 2 is produced, and flue gas is from flue gas recirculation pipeline 1
Enter in one end of boiler nozzle 3, the flue gas of return sprays again after being burned the suction of the blower fan of device 2 with ozone and fuel
Enter in burner hearth, because of a part of backflow flue gas that adulterates, also limit in the oxygen content in burner hearth, burner hearth and be in a kind of hypoxemia shape
Burning under state, ignition temperature is decreased, and the nitrous oxides concentration that boiler produces flue gas is also decreased, and reaches national environmental protection
The emission request of standard.Flue gas recirculation device of the present utility model this have the advantage that in terms of existing technologies：Effectively
The nitrous oxides concentration in flue gas is reduced, the emission request of national environmental standard is met.
Flue gas recirculation device of the present utility model, as Figure 1-Figure 2, on the basis of previously described technical scheme
It can also be：Flue gas concentration detection part and flue gas input control unit, the cigarette are provided with the flue gas recirculation pipeline 1
Gas Concentration Testing part is arranged on the boiler nozzle 3, and the flue gas input control unit is arranged on the flue gas and followed again
On endless tube road 1, the flue gas concentration detection part is connected with the flue gas input control unit signal.So, boiler tail is produced
Raw flue gas relies on the negative-pressure sucking that the blower fan of burner 2 is produced, and flue gas is from flue gas recirculation pipeline 1 the one of boiler nozzle 3
End enters, and is flowed forward along flue gas recirculation pipeline 1, after the operation of boiler normal ignition, flue gas concentration detection part detection boiler
The nitrous oxides concentration of flue gas in outlet flue, and testing result is passed to flue gas input control unit, flue gas input control unit
The exhaust gas volumn that part controls to return according to testing result, the flue gas of return is burned after the suction of the blower fan of device 2 with ozone and combustion
Material is sprayed into burner hearth again, because of a part of backflow flue gas that adulterates, be also limit in the oxygen content in burner hearth, burner hearth and is in one
The burning under hypoxia is planted, ignition temperature is decreased, the nitrous oxides concentration that boiler produces flue gas is also decreased, and is reached
The emission request of national environmental standard.Further preferred technical scheme is：The flue gas concentration detection part is flue gas analysis
Probe 4.So, flue gas concentration detection part can effectively analyze nitrogen oxygen content ratio in flue gas using flue gas analysis probe 4,
Make measurement data more accurate.Further preferred technical scheme is：The flue gas input control unit includes flue gas control valve 5
With boiler implosion cabinet 6, the flue gas control valve 5 is connected with the boiler implosion cabinet 6 by control line, the flue gas concentration detection
Part is connected with the signal of boiler implosion cabinet 6.So, the flue gas that boiler tail is produced is by bearing that the blower fan of burner 2 is produced
Suction is pressed, flue gas enters in one end of boiler nozzle 3 from flue gas recirculation pipeline 1, flowed forward along flue gas recirculation pipeline 1
Dynamic, after the operation of boiler normal ignition, flue gas analysis probe 4 detects the nitrous oxides concentration of flue gas in boiler nozzle, and inspection
Survey result and pass to boiler implosion cabinet 6, boiler implosion cabinet 6 passes to flue gas control valve 5 according to testing result by control line, and
Its aperture, that is, the exhaust gas volumn that indirect control is returned are adjusted by flue gas control valve 5, the flue gas of return is burned the blower fan of device 2
Spray into burner hearth, because of a part of backflow flue gas that adulterates, also limit in burner hearth again with ozone and fuel after suction
A kind of burning being under hypoxia in oxygen content, burner hearth, ignition temperature is decreased, and boiler produces the nitrogen oxygen of flue gas
Compound concentration is also decreased, and reaches the emission request of national environmental standard.
Flue gas recirculation device of the present utility model, as Figure 1-Figure 2, on the basis of previously described technical scheme
It can also be：At least one flange is provided with the flue gas recirculation pipeline 1, the flange is set in the flue gas recirculation
On pipeline 1, the flange outer surface is fixedly connected with boiler shell.So, by being set at least on flue gas recirculation pipeline 1
One flange, flange is set on the flue gas recirculation pipeline 1, and flange outer surface is fixedly connected with boiler shell, flue gas
Recirculation conduit 1 is fixed on boiler shell outer surface by flange, effectively prevents flue gas by flue gas recirculation pipeline 1
When, air-flow velocity is uneven to cause flue gas recirculation pipeline 1 to vibrate, the structural stability of protection flue gas recirculation pipeline 1.
Further preferred technical scheme is：The flange is provided with two, and two flanges are respectively sleeved at the flue gas and followed again
The rear and front end of endless tube road 1.So, by being fixed at the two ends of flue gas recirculation pipeline 1, in the initial end of vibration and end all
Position restriction is carried out to flue gas recirculation pipeline 1, fixed effect is more.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (6)
1. a kind of flue gas recirculation device, it is characterised in that：Including being provided with cigarette between burner (2) and boiler nozzle (3)
Gas recirculation conduit (1), described flue gas recirculation pipeline (1) one end is through the boiler nozzle (3) and is fixedly installed on institute
State on boiler nozzle (3), flue gas recirculation pipeline (1) other end is connected with the burner (2).
2. flue gas recirculation device according to claim 1, it is characterised in that：Set on the flue gas recirculation pipeline (1)
Flue gas concentration detection part and flue gas input control unit are equipped with, the flue gas concentration detection part is arranged on the boiler smoke
On mouth (3), the flue gas input control unit is arranged on the flue gas recirculation pipeline (1), the flue gas concentration test section
Part is connected with the flue gas input control unit signal.
3. flue gas recirculation device according to claim 2, it is characterised in that：The flue gas concentration detection part is flue gas
Analysis probe (4).
4. flue gas recirculation device according to claim 3, it is characterised in that：The flue gas input control unit includes cigarette
Gas control valve (5) and boiler implosion cabinet (6), the flue gas control valve (5) are connected with the boiler implosion cabinet (6) by control line
Connect, the flue gas concentration detection part is connected with boiler implosion cabinet (6) signal.
5. the flue gas recirculation device according to claim 1-4 any one, it is characterised in that：The flue gas recirculation pipe
At least one flange is provided with road (1), the flange is set on the flue gas recirculation pipeline (1), on the outside of the flange
Surface is fixedly connected with boiler shell.
6. flue gas recirculation device according to claim 5, it is characterised in that：The flange is provided with two, two institutes
State flange and be respectively sleeved at flue gas recirculation pipeline (1) rear and front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720031795.1U CN206398703U (en) | 2017-01-11 | 2017-01-11 | A kind of flue gas recirculation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720031795.1U CN206398703U (en) | 2017-01-11 | 2017-01-11 | A kind of flue gas recirculation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206398703U true CN206398703U (en) | 2017-08-11 |
Family
ID=59513333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720031795.1U Active CN206398703U (en) | 2017-01-11 | 2017-01-11 | A kind of flue gas recirculation device |
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| Country | Link |
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| CN (1) | CN206398703U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489033A (en) * | 2018-11-16 | 2019-03-19 | 广东宝杰环保科技有限公司 | The low nitrogen processing method of biogas combustion tail gas and burner apparatus |
| CN112113239A (en) * | 2020-09-11 | 2020-12-22 | 濮阳市盛源石油化工（集团）有限公司 | Low-nitrogen boiler for removing return air condensate water |
| CN112212704A (en) * | 2020-10-27 | 2021-01-12 | 李秀梅 | Flue gas recirculation combustion control device of carbon roasting furnace |
| CN114087604A (en) * | 2021-10-14 | 2022-02-25 | 吉林宏日新能源股份有限公司 | Biomass boiler with smoke recirculation function |
-
2017
- 2017-01-11 CN CN201720031795.1U patent/CN206398703U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489033A (en) * | 2018-11-16 | 2019-03-19 | 广东宝杰环保科技有限公司 | The low nitrogen processing method of biogas combustion tail gas and burner apparatus |
| CN112113239A (en) * | 2020-09-11 | 2020-12-22 | 濮阳市盛源石油化工（集团）有限公司 | Low-nitrogen boiler for removing return air condensate water |
| CN112212704A (en) * | 2020-10-27 | 2021-01-12 | 李秀梅 | Flue gas recirculation combustion control device of carbon roasting furnace |
| CN114087604A (en) * | 2021-10-14 | 2022-02-25 | 吉林宏日新能源股份有限公司 | Biomass boiler with smoke recirculation function |
| CN114087604B (en) * | 2021-10-14 | 2023-12-01 | 吉林宏日新能源股份有限公司 | Biomass boiler with smoke recycling function |
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