CN205627569U - Comprehensive denitration treatment system of flue gas - Google Patents
Comprehensive denitration treatment system of flue gas Download PDFInfo
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- CN205627569U CN205627569U CN201620318410.5U CN201620318410U CN205627569U CN 205627569 U CN205627569 U CN 205627569U CN 201620318410 U CN201620318410 U CN 201620318410U CN 205627569 U CN205627569 U CN 205627569U
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- Prior art keywords
- spray gun
- processing system
- flue
- comprehensive
- oxidation
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- 239000007921 spray Substances 0.000 claims abstract description 49
- 230000003647 oxidation Effects 0.000 claims abstract description 39
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 39
- 230000001590 oxidative effect Effects 0.000 claims abstract description 18
- 239000007800 oxidant agent Substances 0.000 claims abstract description 17
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 16
- 238000000151 deposition Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 31
- 238000006386 neutralization reaction Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 27
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000000112 cooling gas Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 235000013877 carbamide Nutrition 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 description 1
- 229940005991 chloric acid Drugs 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a comprehensive denitration treatment system of flue gas, it includes: SNCR reactor, SCR reactor, dust remover and the desulfurizing tower of setting connect gradually, wherein, still be equipped with the oxidation treatment unit between dust remover and the desulfurizing tower, the oxidation treatment unit including the oxidant jar of depositing the oxidant and in setting up the flue between dust remover and desulfurizing tower, with the oxidation spray gun that the oxidant jar links to each other. The utility model discloses a processing system can promote denitration reaction's boiler load adaptability, carries out the denitration from the ignition stage to homoenergetic at full capacity, realizes full operating mode denitration.
Description
Technical field
This utility model relates to the processing system of a kind of boiler smoke, it is specifically related to a kind of employing SNCR, SCR and oxidation and denitration (Selective Oxidation/Neutralization Reaction, SONR technique) mode that combines comprehensive denitration processing system (ALL IN ONE, AIO system) that boiler smoke is processed；Belong to air contaminant treatment field.
Background technology
Coal can produce substantial amounts of oxysulfide, nitrogen oxides, dust and heavy metal during burning.Wherein, a part of pollutant produce the most in combustion from the component of fuel self, major part pollutant.Environment will be caused destruction greatly by the generation of these flue gas pollutants.The discharge standard of the most domestic nitrogen oxides is 200mg/m3 to 100mg/m3, key area is 50mg/m3。
For nitrogen oxides, this area treatment technology currently mainly includes: low nitrogen oxide burning technology, SNCR (SNCR) technology, SCR (selective catalytic reduction) technology, oxidizing process and mixed powder technology.But, above-mentioned treatment technology, there is secondary pollution problem in various degree and technology short slab.Such as, in existing SCR technology, the running temperature of catalyst is 300 DEG C-400 DEG C, and this can not meet this temperature requirement in the case of boiler startup and underload.And existing SNCR technology, its running temperature is up to 850 DEG C-1150 DEG C, similar to SCR technology, and this can not reach this temperature requirements in the case of boiler startup and underload, thus causes the timely and effective process that can not realize flue gas.Additionally, along with environmental regulation proposes more strict requirements to the control of pollutant, the flue gas after above-mentioned single treatment technology processes has been extremely difficult to the strictest emission request.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of comprehensive denitration processing system filtering flue gas and process technique, treatment effeciency is high, high treating effect, can realize " zero-emission " of boiler smoke.
For achieving the above object, this utility model is by the following technical solutions:
A kind of comprehensive denitration processing system of flue gas, comprising: be sequentially connected with the SNCR reactor of setting, SCR reactor, cleaner unit and desulfurizing tower, wherein, being additionally provided with oxidation processes unit between described cleaner unit and desulfurizing tower, described oxidation processes unit includes the oxidant tank depositing oxidant and is arranged at oxidation spray gun in the flue between cleaner unit and desulfurizing tower, that be connected with described oxidant tank.
Preferably: in the temperature range that described oxidation spray gun is arranged between cleaner unit and desulfurizing tower is the flue of 60-120 DEG C.
Preferably: described oxidation processes unit also includes the neutralization spray gun being connected with described nertralizer tank in the nertralizer tank depositing nertralizer and the flue being arranged at described oxidation spray gun rear.
Preferably: described neutralization spray gun is arranged in the flue in the 0.5m-5m at described oxidation spray gun rear.
Preferably: described neutralization spray gun includes gun body and is located at the shower nozzle of gun body front end, and being provided with pipeline inside described gun body, the end of described pipeline is connected with shower nozzle and nertralizer tank respectively with afterbody.
Preferably: the structure of described oxidation spray gun is identical with the structure of described neutralization spray gun.
Preferably: the bottom of described SNCR reactor is provided with low nitrogen combustion apparatus.
Preferably: in the flue in described oxidation spray gun front, be provided with flow straightening grid.
Preferably: described integrated treatment denitrating system also includes the PLC control unit that each processing unit/reactor runs control automatically.
The beneficial effects of the utility model are, AIO processing system of the present utility model and technique, can process the flue gas at various temperature, and be swift in response, pollutants removal rate high, can substantially realize the zero-emission of flue gas pollutant.Utilize the processing system of the present invention and process technique, when at boiler startup and running when boiler at low load, flue-gas temperature does not reaches the reaction condition of other denitrating techniques, SONR oxidation technology can carry out denitration reaction under this operating mode, and then the boiler load promoting denitration reaction adapts to ability, from ignition phase to the most all carrying out denitration, it is achieved full working scope denitration.And, use processing system and the technique of the present invention, can reduce further in tradition denitrating technique reducing agent and the consumption of catalyst, reduce the operating cost that denitration processes.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the comprehensive denitration processing system of flue gas described in the utility model；
Fig. 2 shows the structural representation of oxidation spray gun described in the utility model/neutralization spray gun.
Detailed description of the invention
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described further.
As shown in Figure 1, the comprehensive denitration processing system of flue gas described in the utility model, it SNCR reactor 1 including being sequentially connected with setting successively by flue, SCR reactor 2, cleaner unit 3 and desulfurizing tower 5, wherein, the bottom of described SNCR reactor 1 is additionally provided with low nitrogen combustion apparatus (not shown), described processing system also includes oxidation processes unit 4, described oxidation processes unit includes the oxidation spray gun 44 being located in the flue between cleaner unit 3 and desulfurizing tower 5 and is connected with described oxidation spray gun 44, the oxidant tank 41 depositing oxidant being located at outside flue, in this utility model, oxidant in described oxidant tank 41 can be ozone, chlorine dioxide, hydrogen peroxide, sodium chlorite, sodium hypochlorite, the oxidant such as potassium permanganate or chloric acid.Further, in this utility model, described oxidation spray gun 44 is arranged between cleaner unit 3 and desulfurizing tower 5, temperature range is the flue of 60-120 DEG C.In addition, what oxidation processes unit described in the utility model included being arranged in the flue at described oxidation spray gun 44 rear neutralize spray gun 43 and be connected with described neutralization spray gun 43, the nertralizer tank 42 depositing nertralizer be located at outside flue, in this utility model, described nertralizer can use the antalkalis such as calcium hydroxide aqueous solution, sodium hydrate aqueous solution, sodium sulfite aqueous solution, aqueous solution of urea, ammonia.Further, in the flue in the range of described neutralization spray gun 43 is arranged at the 0.5m-5m at described oxidation spray gun 44 rear.Further, described nertralizer tank 42 is also connected with the spray assemblies 51 in desulfurizing tower 5, so that flue gas is carried out advanced treating.Preferably, in the flue in described oxidation spray gun 44 front, it is additionally provided with flow straightening grid 45, to improve flue gas stability in flue.
Advantageously, oxidation spray gun 44 described in the utility model and neutralization spray gun 43 can use identical structure, as shown in Figure 2, described oxidation spray gun 44/ includes gun body 400 in a tubular form with spray gun 43 and is located at the shower nozzle 401 of gun body 400 front end, described gun body 400 is internal is provided with a pipeline 402 passed through for oxidant/nertralizer, the end of described pipeline 402 is connected with shower nozzle 401, and its afterbody is provided with the entrance 403 can being connected with oxidant tank 41/ nertralizer tank 42.Additionally, the surrounding of the inside of described gun body 400, pipeline 402 is injected with also by the cooling gas inlet 404 being located at gun body 400 afterbody and is dried cooling gas, described cooling gas can be air, oxygen or nitrogen.Further, shower nozzle 401 described in the utility model, the center is provided with a rectangular nozzle (not shown), the aperture area of described rectangular nozzle is the 5-10% of the cross-sectional area of shower nozzle 401, and then the spray angle controlling nozzle is 15 °-30 °, to ensure in the range of this spray angle, the atomised form of nozzle is taper or sector, guarantee the jet atomization effect that shower nozzle is good, both will not be ejected in flue inner wall, can guarantee that again the swept area of maximum so that ozone and the nitrogen oxides in flue gas, oxysulfide react and be more uniformly distributed fully.Additionally, in this utility model, the material of each parts of described spray gun can use rustless steel such as 316L or titanium material, and is provided with adpting flange 405 to be fixed on removably in flue by described spray gun at the afterbody of gun body 400.Further, described oxidation spray gun 44 and/or neutralization spray gun 43 can use annular configuration or single-sided arrangement (boiler flue cross section is under rectangular situation), the most uniform to realize, and make the reaction of nitrogen oxides in flue gas complete.More advantageously, flue gas in flue can be carried out flow field simulation, and carry out flue internal oxidition spray gun 44 according to the concentration of nitrogen oxides in the result of flow field simulation and flue and/or neutralize the arrangement of spray gun 43, such as, include but not limited to, the quantity of spray gun, the position of spray gun and the spray regime etc. of spray gun.Additionally, processing system described in the utility model, also include the PLC control unit that the reaction temperature in each processing unit/reactor, pressure, flow etc. are automatically controlled.
Using this utility model processing system as above to process kiln gas, it processes step and includes:
A, from boiler produce flue gas enter into SNCR reactor 1, the nitrogen oxides in flue gas is reduced with ammonia or carbamide for reducing agent；
B, flue gas after reducing agent reduces, in flue enters into SCR reactor 2, remove the nitrogen oxides in flue gas under the effect of catalyst, and subsequently enter in cleaner unit 3 to remove the particulate pollutant in flue gas；
C, subsequently, flue gas enters in oxidation processes unit 4, under the effect of oxidant, water-fast pollutant remaining in flue gas are further oxidized to water-soluble high-valence state acid group, and by nertralizer, the highly acid flue gas generated in oxidation processes is neutralized, to reduce the highly acid flue gas infection to equipment, improve the service life of equipment；
Flue gas after d, oxidized, neutralisation treatment enters and carries out desulfurization in desulfurizing tower 5 and process the pollutant such as the oxysulfide to remove in flue gas further.
This utility model AIO as above processing system and process technique, flue gas at various temperature can be processed, and be swift in response, pollutants removal rate high, the boiler load that can promote denitration reaction adapts to ability, from ignition phase to the most all carrying out denitration, it is achieved full working scope denitration.
This utility model is by preferred embodiment having carried out detailed explanation.But, by studying carefully above, to the change of each embodiment with to increase also be apparent to one of ordinary skill in the art.It is intended that all these changes and increase fall in this utility model scope of the claims.Similar numbering refers to similar element.For clarity, may there is situation about some line, layer, element, parts or feature being amplified in the accompanying drawings.
Term used herein is only and is illustrated specific embodiment, is not intended to limit this utility model.Unless otherwise defined, all terms used herein (including technical term and scientific terminology) are all identical with the understanding of this utility model one of ordinary skill in the art.Must also be it is clear that in addition to having clear and definite definition in this article, in such as dictionary, the term of generally definition should be construed to can have the consistent meaning in the linguistic context of this specification and correlation technique, and the idealization should do not explained or undue formalization.Known function or structure are in briefly and clearly consider or repeat no more.
Claims (9)
1. the comprehensive denitration processing system of a flue gas, it is characterized in that: described comprehensive denitration processing system includes being sequentially connected with the SNCR reactor of setting, SCR reactor, cleaner unit and desulfurizing tower, wherein, being additionally provided with oxidation processes unit between described cleaner unit and desulfurizing tower, described oxidation processes unit includes the oxidant tank depositing oxidant and is arranged at oxidation spray gun in the flue between cleaner unit and desulfurizing tower, that be connected with described oxidant tank.
Comprehensive denitration processing system the most according to claim 1, it is characterised in that: in the temperature range that described oxidation spray gun is arranged between cleaner unit and desulfurizing tower is the flue of 60-120 DEG C.
Comprehensive denitration processing system the most according to claim 1, it is characterised in that: described oxidation processes unit also includes the neutralization spray gun being connected with described nertralizer tank in the nertralizer tank depositing nertralizer and the flue being arranged at described oxidation spray gun rear.
Comprehensive denitration processing system the most according to claim 3, it is characterised in that: described neutralization spray gun is arranged in the flue in the 0.5m-5m at described oxidation spray gun rear.
Comprehensive denitration processing system the most according to claim 3, it is characterized in that: described neutralization spray gun includes gun body and is located at the shower nozzle of gun body front end, being provided with pipeline inside described gun body, the end of described pipeline is connected with shower nozzle and nertralizer tank respectively with afterbody.
Comprehensive denitration processing system the most according to claim 5, it is characterised in that: the structure of described oxidation spray gun is identical with the structure of described neutralization spray gun.
7. according to the General Office's denitration reason system described in any one in claim 1-6, it is characterised in that: the bottom of described SNCR reactor is provided with low nitrogen combustion apparatus.
8. according to the comprehensive denitration processing system described in any one in claim 1-6, it is characterised in that: it is provided with flow straightening grid in the flue in described oxidation spray gun front.
9. according to the comprehensive denitration processing system described in any one in claim 1-6, it is characterised in that: described comprehensive denitration processing system also includes the PLC control unit that each processing unit/reactor runs control automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620318410.5U CN205627569U (en) | 2016-04-15 | 2016-04-15 | Comprehensive denitration treatment system of flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620318410.5U CN205627569U (en) | 2016-04-15 | 2016-04-15 | Comprehensive denitration treatment system of flue gas |
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| CN205627569U true CN205627569U (en) | 2016-10-12 |
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| CN201620318410.5U Expired - Fee Related CN205627569U (en) | 2016-04-15 | 2016-04-15 | Comprehensive denitration treatment system of flue gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105664688A (en) * | 2016-04-15 | 2016-06-15 | 北京宜泽环保科技有限责任公司 | Flue gas comprehensive denitration treatment system and treatment technology |
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2016
- 2016-04-15 CN CN201620318410.5U patent/CN205627569U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105664688A (en) * | 2016-04-15 | 2016-06-15 | 北京宜泽环保科技有限责任公司 | Flue gas comprehensive denitration treatment system and treatment technology |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 |