CN108339386A - A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation - Google Patents
A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation Download PDFInfo
- Publication number
- CN108339386A CN108339386A CN201810356933.2A CN201810356933A CN108339386A CN 108339386 A CN108339386 A CN 108339386A CN 201810356933 A CN201810356933 A CN 201810356933A CN 108339386 A CN108339386 A CN 108339386A
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- Prior art keywords
- flue gas
- scr denitration
- gas recirculation
- bag filter
- air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The present invention discloses a kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation, former cigarette device, deacidifying flue gas detoxifying unit, bag filter, SCR denitration unit, air-introduced machine and flue gas recirculation pipeline including passing sequentially through flue connection, the flue gas recirculation pipeline has bending tubes end and smoke end, bending tubes end is connected to air-introduced machine exhaust pass, or is connected to bag filter exhaust pass；Smoke end is connect with bag filter upstream flue.The remaining thermal flue gas back of bag filter exhaust pass or air-introduced machine exhaust pass is led to bag filter upstream by the present invention by the way that flue gas recirculation pipeline is arranged, make full use of the waste heat flue gas in this system, so that SCR denitration unit inlet temperature is improved, both the input to SCR denitration unit inlet flue gas energy had been saved, in turn ensure SCR denitration unit operating condition, and the smoke evacuation overall reduction of chimney, whole system have achieved the effect that economic, environmental protection operation.
Description
Technical field
The present invention relates to field of environment protection equipment, more particularly to it is a kind of using flue gas recirculation improve SCR denitration reactor into
The system of mouth temperature.
Background technology
Currently, in field of environment protection, gas cleaning is generally realized using depickling, detoxification, dust collecting process to source cigarette successively
Gas does discharge pre-treatment, has many places to need to use wind regime, such as bag filter before flue gas enters SCR denitration reactor
Not yet complete deacidification agent is reacted in depickling reactor containing part in the flying dust of middle collection, to reduce the use of deacidification agent
Amount improves the service efficiency of deacidification agent, and generally use flying dust recycles mode, and the fluidized air blower air inlet of flying dust cycle can be protected
Card flying dust has preferable mobility during recycling, and wind regime is usually normal temperature air.Due to the introducing of normal temperature air,
Exhaust gas volumn is caused to increase, in addition the introducing of flue humidification normal-temperature water, the smoke temperature of house outlet reduce significantly, it can not
Meet SCR denitration reactor catalysis reduction SCR reaction temperatures and require such as 150~250 DEG C, needs to reach by heating flue gas
Corresponding temperature requirement.Existing smoke processing system presence reaches SCR denitration reactor and needs the heat additionally supplemented excessively high, is
The problems such as smoke discharge amount of uniting increases.
Invention content
The main object of the present invention is that proposition is a kind of
System, it is intended to save the additional addition energy of SCR denitration work, reduce smoke discharge amount.
To achieve the above object, a kind of utilization flue gas recirculation proposed by the present invention improves SCR denitration Reactor inlet temperature
The system of degree, including：Pass sequentially through flue connection former cigarette device, deacidifying flue gas detoxifying unit, bag filter, SCR denitration
Unit and air-introduced machine；Wherein, the system for improving SCR denitration reactor inlet temperatures using flue gas recirculation further includes flue gas
Recirculating line, the flue gas recirculation pipeline have bending tubes end and smoke end, wherein
The bending tubes end is connected to the air-introduced machine exhaust pass, or is connected to the bag filter exhaust pass；
The smoke end is connect with bag filter upstream flue.
Preferably, the bag filter is equipped with flying dust circulation line, and the flying dust circulation line is configured to make the cloth
The dust that bag dust collector is collected is again introduced into the flue of the bag filter upstream, and the flying dust circulation line is equipped with fluidized wind
Machine, the air inlet of the fluidized air blower are connect with the smoke end.
Preferably, the flue gas recirculation pipeline includes detoxifying agent air return pipeline, one end of the detoxifying agent air return pipeline
For the bending tubes end, the other end is the smoke end, and the smoke end is connected to the detoxification in the deacidifying flue gas detoxifying unit
The air inlet of agent conveying fan.
Preferably, the flue gas recirculation pipeline includes desulfurizing agent air return pipeline, one end of the desulfurizing agent air return pipeline
For the bending tubes end, the other end is the smoke end, and the smoke end is connected to the desulfurization in the deacidifying flue gas detoxifying unit
The air inlet of agent conveying fan.
In technical solution provided by the invention, by the way that flue gas recirculation pipeline is being arranged by the waste heat in bag filter downstream
Flue gas returns the flue re-using for leading to the smoke end with the bag filter upstream so that SCR denitration Reactor inlet
Temperature is improved, and has both saved the input to SCR denitration unit inlet flue gas energy, has in turn ensured SCR denitration list
The operating mode of member operation, and the exhaust smoke level overall reduction of chimney, whole system have achieved the effect that economic, environmental protection operation.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the first of the system provided by the invention that SCR denitration reactor inlet temperatures are improved using flue gas recirculation
The system schematic of embodiment；
Fig. 2 is the second of the system provided by the invention that SCR denitration reactor inlet temperatures are improved using flue gas recirculation
The system schematic of embodiment；
Drawing reference numeral explanation：
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the embodiment of the present invention directionality instruction (such as up, down, left, right, before and after ...),
Then directionality instruction be only used for explaining relative position relation under a certain particular pose (as shown in the picture) between each component,
Motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If in addition, relating to the description of " first ", " second " etc. in the embodiment of the present invention, it is somebody's turn to do " first ", " second " etc.
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.In addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, when the knot that conflicting or cannot achieve when will be understood that this technical solution occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection domain within.
The present invention proposes a kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation, it is intended to solve
Existing smoke processing system presence reaches SCR denitration reactor and needs the heat additionally supplemented excessively high, and system smoke discharge amount increases
The problems such as adding.
Fig. 1 to Fig. 2 is the embodiment of the system that SCR denitration reactor inlet temperatures are improved using flue gas recirculation.
It please refers to Fig.1 to Fig. 2, the system for improving SCR denitration reactor inlet temperatures using flue gas recirculation includes：
It is sequentially connected in series former cigarette device 1, deacidifying flue gas detoxifying unit 2, bag filter 3, SCR denitration unit 4 and the air-introduced machine 5 of setting,
And flue gas recirculation pipeline 6, the flue gas recirculation pipeline 6 have bending tubes end and smoke end, wherein the bending tubes end connection
In 3 exhaust pass of the bag filter；Alternatively, the bending tubes end is connected to 5 exhaust pass of the air-introduced machine；The smoke end
It is connect with the flue of 3 upstream of the bag filter.Wherein the former cigarette device 1 can be waste incinerator, coal-burning boiler, life
Substance boiler etc., the flue gas in former cigarette device 1 flow through deacidifying flue gas detoxifying unit 2, bag filter 3, SCR denitration unit 4, most
Chimney discharge is guided by air-introduced machine 5.
In technical solution provided by the invention, by the way that flue gas recirculation pipeline 6 is arranged by the waste heat in 3 downstream of bag filter
Flue gas returns the flue re-using for leading to 3 upstream of the bag filter so that 4 inlet temperature of SCR denitration unit is carried
Height had both saved the input to 4 import flue gas energy of SCR denitration unit, in turn ensured the work that SCR denitration unit 4 is run
Condition achievees the purpose that economical operation.There are many arrangements for flue gas recirculation pipeline 6, specifically please refer to embodiment one and two.
Embodiment one：
Referring to Fig. 1, the bending tubes end of the flue gas recirculation pipeline 6 is quoted from 3 exhaust pass of the bag filter；It is described
Deacidifying flue gas detoxifying unit 2 includes desulfurizing agent conveying fan 21 and detoxifying agent conveying fan 22；The bag filter 3, which is equipped with, to fly
Grey circulation line 7, the dust that the flying dust circulation line 7 is configured to that the bag filter 3 is made to collect are again introduced into the cloth
The flue of 3 upstream of bag dust collector, the flying dust circulation line 7 are equipped with fluidized air blower 71.The desulfurizing agent conveying fan 21 and institute
The air inlet for stating detoxifying agent conveying fan 22 and fluidized air blower 71 is connected to the smoke end of the flue gas recirculation pipeline 6.
The bending tubes end of flue gas recirculation pipeline described in the present embodiment 6 is quoted from the bag filter 3 and the SCR denitration
It is defeated can be passed through the fluidized air blower 71, desulfurizing agent by the flue between unit 4 for the waste heat flue gas of 3 air outlet of bag filter
Pressure fan 21 and detoxifying agent conveying fan 22；Compared with use normal temperature air as fluidized air blower 71, desulfurizing agent conveying fan
21 and detoxifying agent conveying fan 22 wind regime reduce the temperature of 4 entrance flue gas of SCR denitration unit for, SCR denitration list
The reaction temperature of member 4 can be 180 to 210 DEG C, and the exhaust gas temperature of former 1 such as waste incinerator of cigarette device can be 150 DEG C, cloth
The temperature of 3 air outlet of bag dust collector can be 145 to 175 DEG C or so, using the waste heat flue gas of air-introduced machine 5 as the fluidized air blower
71, after the wind regime of desulfurizing agent conveying fan 21, detoxifying agent conveying fan 22, the inlet temperature of the flue gas SCR denitration unit 4 carries
It is 5 to 15 DEG C high, save the mass energy that the mating smoke pre-heating device of SCR denitration unit 4 uses；And due to fluidized wind
Machine 71, desulfurizing agent conveying fan 21, detoxifying agent conveying fan 22 wind regime be all made of the waste heat flue gas of internal system, whole system
Do not increase flue gas additionally so that the smoke evacuation of exhaust gas volumn and the chimney caused by the 1 such as waste incinerator of original cigarette device
It measures unanimous on the whole, reduces compared to the exhaust smoke level for introducing external source air chimney, using taking circulating flue gas to make after bag filter 3
For wind regime, air quantity by air-introduced machine 5 can be reduced compared to wind regime is used air as, 5 power adaptation power of air-introduced machine can drop
It is low, it is possible to reduce the power consumption of air-introduced machine 5.
Embodiment two：
Referring to Fig. 2, air outlet of the bending tubes end of the flue gas recirculation pipeline 6 quoted from the air-introduced machine 5；The flue gas
Depickling detoxifying unit 2 includes desulfurizing agent conveying fan 21 and detoxifying agent conveying fan 22；The bag filter 3 is followed equipped with flying dust
Endless tube road 7, the dust that the flying dust circulation line 7 is configured to that the bag filter 3 is made to collect are again introduced into the cloth bag and remove
The flue of 3 upstream of dirt device, the flying dust circulation line 7 are equipped with fluidized air blower 71；The desulfurizing agent conveying fan 21 and described de-
The air inlet of toxic agent conveying fan 22 and the fluidized air blower 71 is connected to the smoke end of the flue gas recirculation pipeline 6.
The bending tubes end of the flue gas recirculation pipeline 6, can be by the air-introduced machine 5 quoted from the air outlet of the air-introduced machine 5
Air outlet waste heat flue gas as the fluidized air blower 71, the wind regime of desulfurizing agent conveying fan 21, detoxifying agent conveying fan 22,
It is dropped compared with wind regime of the normal temperature air as the fluidized air blower 71, desulfurizing agent conveying fan 21, detoxifying agent conveying fan 22 is used
For the low temperature of 4 inlet flue gas of SCR denitration unit, the reaction temperature of SCR denitration unit 4 is can be with 180 to 210
DEG C, and the exhaust gas temperature of former 1 such as incinerator of cigarette device can be 150 DEG C, the temperature of 5 air outlet of air-introduced machine can be 160 to 175 DEG C
The waste heat flue gas of air-introduced machine 5 is conveyed wind 22 by left and right
After wind regime, the inlet temperature of the flue gas SCR denitration unit 4 improves 10 to 20 DEG C, and the waste heat flue gas that air-introduced machine 6 is exported is made
After the wind regime for conveying wind 22 for the fluidized air blower 71, desulfurizing agent conveying fan 21, detoxifying agent, the flue gas SCR denitration unit 4
Inlet temperature improve 10 DEG C to 20 DEG C.And since whole system does not increase flue gas additionally, compared to introduction external source
The exhaust smoke level of air chimney reduces, and using taking circulating flue gas due to being positive pressure return air after air-introduced machine 6, can reduce fluidisation
The adaptive power and power consumption of wind turbine 71, desulfurizing agent conveying fan 21, detoxifying agent conveying wind 22, greatly reduce setting for system
Standby cost and operation cost, realize the purpose of economical operation.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (4)
1. a kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation, including pass sequentially through flue connection
Former cigarette device, deacidifying flue gas detoxifying unit, bag filter, SCR denitration unit and air-introduced machine, which is characterized in that the profit
The system for improving SCR denitration reactor inlet temperatures with flue gas recirculation further includes flue gas recirculation pipeline, and the flue gas follows again
Endless tube road has bending tubes end and smoke end, wherein
The bending tubes end is connected to the air-introduced machine exhaust pass, or is connected to the bag filter exhaust pass；
The smoke end is connect with bag filter upstream flue.
2. the system for improving SCR denitration reactor inlet temperatures using flue gas recirculation as described in claim 1, feature exist
In the bag filter is equipped with flying dust circulation line, and the flying dust circulation line is configured to that the bag filter is made to collect
Dust be again introduced into the flue of the bag filter upstream, the flying dust circulation line is equipped with fluidized air blower, the fluidisation
The air inlet of wind turbine is connect with the smoke end.
3. the system for improving SCR denitration reactor inlet temperatures using flue gas recirculation as described in claim 1, feature exist
In, the flue gas recirculation pipeline includes detoxifying agent air return pipeline, and one end of the detoxifying agent air return pipeline is the bending tubes end,
The other end be the smoke end, the smoke end be connected to the detoxifying agent conveying fan in the deacidifying flue gas detoxifying unit into
Air port.
4. the system for improving SCR denitration reactor inlet temperatures using flue gas recirculation as described in claim 1, feature exist
In, the flue gas recirculation pipeline includes desulfurizing agent air return pipeline, and one end of the desulfurizing agent air return pipeline is the bending tubes end,
The other end be the smoke end, the smoke end be connected to the desulfurizing agent conveying fan in the deacidifying flue gas detoxifying unit into
Air port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810356933.2A CN108339386A (en) | 2018-04-19 | 2018-04-19 | A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810356933.2A CN108339386A (en) | 2018-04-19 | 2018-04-19 | A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108339386A true CN108339386A (en) | 2018-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810356933.2A Pending CN108339386A (en) | 2018-04-19 | 2018-04-19 | A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation |
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| CN (1) | CN108339386A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603530A (en) * | 2019-01-03 | 2019-04-12 | 飞潮（无锡）过滤技术有限公司 | A kind of hot exhaust gas is interior to recycle composite purifying process |
| CN109833775A (en) * | 2019-04-03 | 2019-06-04 | 北京工业大学 | A kind of regulation method of plasterboard factory SCR denitration reaction device physical parameter |
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| US20150139882A1 (en) * | 2013-11-15 | 2015-05-21 | Babcock & Wilcox Power Generation Group, Inc. | Integrated sorbent injection and flue gas desulfurization system |
| CN105327619A (en) * | 2015-12-04 | 2016-02-17 | 北京环卫集团环境研究发展有限公司 | Low-temperature SCR reactor, smoke low-temperature denitration system, smoke treatment system and smoke treatment method |
| CN206535396U (en) * | 2017-02-28 | 2017-10-03 | 重庆三峰环境产业集团有限公司 | A kind of system for reducing incineration of refuse flyash yield |
| CN107413193A (en) * | 2017-06-13 | 2017-12-01 | 武汉钢铁有限公司 | One kind sintering flue gas section cyclic flue dust catalytic denitration technique |
| CN208244430U (en) * | 2018-04-19 | 2018-12-18 | 武汉致衡环境安全工程技术有限公司 | A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation |
-
2018
- 2018-04-19 CN CN201810356933.2A patent/CN108339386A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150139882A1 (en) * | 2013-11-15 | 2015-05-21 | Babcock & Wilcox Power Generation Group, Inc. | Integrated sorbent injection and flue gas desulfurization system |
| CN105327619A (en) * | 2015-12-04 | 2016-02-17 | 北京环卫集团环境研究发展有限公司 | Low-temperature SCR reactor, smoke low-temperature denitration system, smoke treatment system and smoke treatment method |
| CN206535396U (en) * | 2017-02-28 | 2017-10-03 | 重庆三峰环境产业集团有限公司 | A kind of system for reducing incineration of refuse flyash yield |
| CN107413193A (en) * | 2017-06-13 | 2017-12-01 | 武汉钢铁有限公司 | One kind sintering flue gas section cyclic flue dust catalytic denitration technique |
| CN208244430U (en) * | 2018-04-19 | 2018-12-18 | 武汉致衡环境安全工程技术有限公司 | A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603530A (en) * | 2019-01-03 | 2019-04-12 | 飞潮（无锡）过滤技术有限公司 | A kind of hot exhaust gas is interior to recycle composite purifying process |
| CN109833775A (en) * | 2019-04-03 | 2019-06-04 | 北京工业大学 | A kind of regulation method of plasterboard factory SCR denitration reaction device physical parameter |
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