CN208244430U - A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation - Google Patents
A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation Download PDFInfo
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- CN208244430U CN208244430U CN201820565168.0U CN201820565168U CN208244430U CN 208244430 U CN208244430 U CN 208244430U CN 201820565168 U CN201820565168 U CN 201820565168U CN 208244430 U CN208244430 U CN 208244430U
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- flue gas
- scr denitration
- gas recirculation
- bag filter
- air
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Abstract
The utility model discloses a kind of system for improving SCR denitration reaction device inlet temperature 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 setting flue gas recirculation pipeline by the utility model, make full use of the waste heat flue gas in this system, so that SCR denitration unit inlet temperature is improved, both the investment 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 utility model relates to field of environment protection equipment, in particular to a kind of to improve SCR denitration reaction using flue gas recirculation
The system of device inlet temperature.
Background technique
Currently, gas cleaning is generally successively realized using depickling, detoxification, dust collecting process to source cigarette in environment protection field
Gas does discharge pre-treatment, has many places to need using wind regime, such as bag filter before flue gas enters SCR denitration reaction device
Not yet complete deacidification agent is reacted in depickling reactor containing part in the flying dust of middle collection, for the use for reducing deacidification agent
Amount, improves the service efficiency of deacidification agent, generallys use flying dust and recycles mode, the fluidized air blower air inlet of flying dust circulation 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 reaction device catalysis reduction SCR reaction temperature and require such as 150~250 DEG C, needs to reach by heating flue gas
Corresponding temperature requirement.Existing smoke processing system is excessively high in the presence of the heat that SCR denitration reaction device needs additionally to supplement is reached, and is
The problems such as smoke discharge amount of uniting increases.
Utility model content
The main purpose of the utility model is to propose that a kind of utilization flue gas recirculation improves SCR denitration reaction device inlet temperature
System, it is intended to save SCR denitration work additional addition energy, reduce smoke discharge amount.
To achieve the above object, the utility model proposes it is a kind of using flue gas recirculation improve SCR denitration reaction device into
The system of mouth temperature, comprising: pass sequentially through former cigarette device, the deacidifying flue gas detoxifying unit, bag filter, SCR of flue connection
Denitration unit and air-introduced machine；Wherein, the system for improving SCR denitration reaction device inlet temperature using flue gas recirculation further includes
Flue gas recirculation pipeline, 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 utility model, by the way that flue gas recirculation pipeline is being arranged by bag filter downstream
Remaining thermal flue gas back leads to the smoke end and the flue of the bag filter upstream re-uses, so that SCR denitration reaction device
Inlet temperature is improved, and has both saved the investment to SCR denitration unit inlet flue gas energy, in turn ensures that SCR is de-
The operating condition of nitre unit operation, and the exhaust smoke level overall reduction of chimney, whole system have achieved the effect that economic, environmental protection operation.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the system provided by the utility model that SCR denitration reaction device inlet temperature is improved using flue gas recirculation
The system schematic of first embodiment；
Fig. 2 is the system provided by the utility model that SCR denitration reaction device inlet temperature is improved using flue gas recirculation
The system schematic of second embodiment；
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
The utility model proposes a kind of systems for improving SCR denitration reaction device inlet temperature using flue gas recirculation, it is intended to
It solves existing smoke processing system and there is excessively high, the system flue gas emission that reaches the heat that SCR denitration reaction device needs additionally to supplement
The problems such as amount increases.
Fig. 1 to Fig. 2 is the embodiment of the system that SCR denitration reaction device inlet temperature is improved using flue gas recirculation.
Fig. 1 to Fig. 2 is please referred to, the system for improving SCR denitration reaction device inlet temperature 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 bag filter；Alternatively, the bending tubes end is connected to 5 exhaust pass of air-introduced machine；The smoke end
It is connect with the flue of 3 upstream of 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 utility model, by the way that flue gas recirculation pipeline 6 is arranged by 3 downstream of bag filter
The flue that remaining thermal flue gas back leads to 3 upstream of bag filter re-uses, so that 4 inlet temperature of SCR denitration unit obtains
It improves, had both saved the investment to 4 import flue gas energy of SCR denitration unit, in turn ensure that SCR denitration unit 4 is run
Operating condition, achieve the purpose that economical operation.There are many arrangements for flue gas recirculation pipeline 6, specifically please refer to one He of embodiment
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 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 collect the bag filter 3 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 is mentioned
It is 5 to 15 DEG C high, save the mass energy that the matched 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 collect the bag filter 3 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, desulfurizing agent conveying fan 21, detoxifying agent conveying fan 22 wind regime,
Compared with use normal temperature air as the fluidized air blower 71, desulfurizing agent conveying fan 21, detoxifying agent conveying fan 22 wind regime drop
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
Blower 71, desulfurizing agent conveying fan 21, detoxifying agent convey the adaptive power and power consumption of wind 22, greatly reduce setting for system
Standby cost and operation cost, realize the purpose of economical operation.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (4)
1. a kind of system for improving SCR denitration reaction device inlet temperature 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 benefit
It further include flue gas recirculation pipeline with the system that flue gas recirculation improves SCR denitration reaction device inlet temperature, 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 reaction device inlet temperature 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 collect the bag filter
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 blower is connect with the smoke end.
3. the system for improving SCR denitration reaction device inlet temperature 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 reaction device inlet temperature 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820565168.0U CN208244430U (en) | 2018-04-19 | 2018-04-19 | A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820565168.0U CN208244430U (en) | 2018-04-19 | 2018-04-19 | A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation |
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| CN208244430U true CN208244430U (en) | 2018-12-18 |
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| CN201820565168.0U Active CN208244430U (en) | 2018-04-19 | 2018-04-19 | A kind of system improving SCR denitration reaction device inlet temperature using flue gas recirculation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339386A (en) * | 2018-04-19 | 2018-07-31 | 武汉致衡环境安全工程技术有限公司 | A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation |
| CN111203097A (en) * | 2020-02-28 | 2020-05-29 | 成都易态科技有限公司 | Flue gas purification treatment equipment and flue gas purification treatment method |
-
2018
- 2018-04-19 CN CN201820565168.0U patent/CN208244430U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339386A (en) * | 2018-04-19 | 2018-07-31 | 武汉致衡环境安全工程技术有限公司 | A kind of system improving SCR denitration reactor inlet temperatures using flue gas recirculation |
| CN111203097A (en) * | 2020-02-28 | 2020-05-29 | 成都易态科技有限公司 | Flue gas purification treatment equipment and flue gas purification treatment method |
| CN111203097B (en) * | 2020-02-28 | 2024-02-02 | 成都易态科技有限公司 | Flue gas purifying treatment equipment and flue gas purifying treatment method |
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