CN205386406U - Pollutant pretreater based on flue gas condensation - Google Patents
Pollutant pretreater based on flue gas condensation Download PDFInfo
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- CN205386406U CN205386406U CN201620101051.8U CN201620101051U CN205386406U CN 205386406 U CN205386406 U CN 205386406U CN 201620101051 U CN201620101051 U CN 201620101051U CN 205386406 U CN205386406 U CN 205386406U
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- flue gas
- tower
- pollutant
- tube bank
- corrosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
Pollutant pretreater based on flue gas condensation includes condensation tube bank, buck hydrops groove, spray set, alkali lye circulation settling basin, condensation tube bank extrinsic cycle pipeline, goes up next part case etc. The flue gas successively gets into the pollutant pretreater behind the cold ware of cigarette, electrostatic precipitator, with condensate water, boiler feed water or the moisturizing emergence heat transfer of the 20 -38 DEG C left and right sides in the condensation tube bank, the vapor cooling in the flue gas is condensed, and acid gas SO2, cl2, F2, NOX etc. Take place the reaction with water and generate acid solution such as H2SO3, H2SO4, HCl, HF, are collected by alkali lye circulation settling basin, simultaneously, chemical reaction also can take place with acid solution for the ammonia of escaping in the flue gas to the ammonia of can the desorption escaping, the utility model discloses a set up condensing pollutant pretreater desorption part pollutant in advance, simplify the desulfurizing tower structure, alleviate desulfurizing tower pressure, reduce the flue gas flow resistance by a wide margin to reduce the fan power consumption, the energy saving, just the utility model discloses basically, do not change the original flue gas flow, the change range is little, and the cost is reasonable.
Description
Technical field
This utility model belongs to flue gas pollutant process for comprehensively treating field, is specifically related to the pollutant pre-corrosion tower based on flue gas condensing.
Background technology
Current coal-burning power plant and coal-fired industry process widely use the boiler based on coal combustion and stove, and coal-fired industry process has a large capacity and a wide range, and majority is in down town or the suburbs, and pollutant comprehensive control difficulty is big, is the most important thing of current China energy-saving and emission-reduction.Thermal Power Generation Industry first proposed the standard reaching gas emission: PM/SO2/NOX10/35/50mg/m should be reached respectively3, minimum discharge target: PM/SO is proposed again afterwards in succession2/NOXRespectively reach 5/20/35mg/m3And make the SO in flue gas simultaneously3/ Hg reaches 5/0.005mg/m3。
Owing to coal-fired coal elemental composition and original design value deviation are very big at present, and part boiler uses the sulphur coal such as quasi-east coal, causes desulfurizer entrance SO2Concentration largely exceedes design load.It is issued to discharge standard in new ature of coal condition, it is necessary to original desulphurization system is carried out capacity-increasing transformation or reconstruction for protecting desulphurization system institute smoke discharging.Some power plant adopts two-stage tandem formula desulfurizing tower: connect by two circular single column, it is divided into before desulfurization tower after tower and desulfurization, the smoke inlet UNICOM of the outlet of front tower flue gas and rear tower, and two tower all adopt limestone gypsum wet spraying technique, rear tower bottom is connected with front tower by being provided with serosity relay pump pipeline.The desulfurizer that flue gas is arranged by cascade towers needs great driving force, and this materially increases the resistance of air-introduced machine.Patent CN201210219246 devises a kind of grading absorption ammonia desulfurizing process, and sulfur-containing smoke gas passes sequentially through spraying layer, packing layer in tower from bottom to top, rinses layer etc. except mist, and spraying layer is according to SO2Concentration level arrange one layer or which floor, be also equipped with multilamellar column plate accordingly, and the resistance of every layer of column plate be up to hundreds of handkerchief.Also have during desulfurizing tower design to adopt Bidirectional spray, or be provided with groove type distributor, air flow method porous plate, flow equalizing ring, rotation converge coupling device, hold liquid uniformity plate, swash plate catcher, gas gathering ring etc. and improve desulfuration efficiency, technique is loaded down with trivial details, and flow process is complicated.These designs and transformation make smoke flow resistance in desulfurizing tower increasing, and blower fan power consumption is huge, results even in and is short of power, and flue gas cannot complete stroke in desulfurizing tower.
Summary of the invention
For the deficiencies in the prior art, the purpose of this utility model is in that to provide the pollutant pre-corrosion tower based on flue gas condensing, after this tower is positioned over electric cleaner, before desulfurizing tower, to SO in flue gasX、NOX, HCl, HF, dust etc. remove in advance, reduce the column plate number of plies, simplify its structure alleviating desulfurizing tower pressure, thus realizing reducing the purpose of smoke flow resistance and blower fan power consumption in desulfurizing tower.
For realizing object above, the technical solution adopted in the utility model is:
Pollutant pre-corrosion tower based on flue gas condensing, described pollutant pre-corrosion tower 4 is arranged between electrostatic precipitator and desulfurizing tower 7, its entrance is connected with electrostatic precipitator outlet by air-introduced machine or booster fan 9, and outlet is connected with desulfurizing tower 7, and desulfurizing tower 7 exports and is connected with chimney 10；Described pollutant pre-corrosion tower 4 is provided with condensation tube bank 1, and condensation tube bank 1 is connected with aqueduct 8 by condensing tube bank outer circulating tube road 11, and in condensation tube bank 1, flow working medium is condense water or boiler replenishing water, feedwater in aqueduct 8, and water temperature is at 20-38 DEG C；Described condensation tube bank 1 is provided above spray equipment 3, and its spray liquid is alkali liquor, and ejecting liquid is induced in service intermittent mode and strengthens condensation process；Working medium and pipe outer flue gas heat exchange in pollutant pre-corrosion tower 4 in condensation tube bank 1, water temperature sends into prime gas cooler or low-pressure heater or economizer as heat medium water after raising, and realizes removing part SO in advance in the way of condensation in pollutant pre-corrosion tower 4 one tower simultaneouslyX、HCl、HF、NOXAnd dust, and remove NH simultaneously3, to alleviate pollutant removing intensity and the pressure of desulfurizing tower 7, reduce desulfurization island entirety energy consumption.
Described spray equipment 3 is connected with the aqueous alkali hydrops groove 2 in pollutant pre-corrosion tower 4, and the alkali liquor circulation Sedimentation tank 5 outside simultaneously with pollutant pre-corrosion tower 4 is connected；The described aqueous alkali hydrops groove 2 acidic liquid for depositing spray aqueous alkali and collection condenses out.
In described condensation tube bank 1, condensed water is warming up to more than 70 DEG C, when heat exchange is not enough, when cigarette temperature can not get fully reducing, opens spray equipment 3 and sprays alkali liquor.
Described condensation tube bank 1 be respectively arranged with upper collecting chamber 13 and lower header 14 up and down, be used for collecting and distributing condensed water.
Described condensation tube bank 1 all adopts the metal tube of fluorine plastic tube or outer lining fluoroplastics.
Described desulfurizing tower 7 is internally provided with desulfurizing tower spraying layer 6 and desulfurization hydrops groove, carries out desulfurization by limestone-gypsum method or other modes.
Compared to the prior art relatively, this utility model possesses following advantage:
1) passing through, condensing pollutant pre-corrosion tower is set and deviate from a part of pollutant, the internal structure of desulfurizing tower after simplifying, decreasing the column plate number of plies, significantly reduce smoke flow resistance, thus reducing blower fan power consumption, saving the energy.
2) pollutant pre-corrosion tower also can condense elimination, HCl, HF, dust, NO at condensation elimination SO2 simultaneously simultaneouslyXDeng, simultaneously HF meeting and NH3Reaction is except ammonia, it is to avoid the escaping of ammonia contaminated environment.
3) condensation reduces flue-gas temperature, creates advantage for the pollutant removing in desulfurizing tower afterwards.
4) fume afterheat heated condensation water or boiler replenishing water, feedwater, eventually serves as heat medium water and is transported to air preheater, low-pressure heater or economizer and is used, saves the energy.
5) acid gas in flue gas condensation produces acid solution HCl, H2SO4Deng, it is possible to antacid, reach the purpose of twice laid.
Accompanying drawing explanation
Fig. 1 is this utility model pollutant pre-corrosion tower schematic diagram based on flue gas condensing.
In figure: 1, condensation tube bank；2, aqueous alkali hydrops groove；3, spray equipment；4, condensing pollutant pre-corrosion tower；5, alkali liquor circulation Sedimentation tank；6, desulfurizing tower spraying layer；7, desulfurizing tower；8, aqueduct；9, booster fan or air-introduced machine；10, chimney；11, condensation tube bank outer circulating tube road；12, cigarette cooler outer circulation pipeline；13, upper collecting chamber；14, lower header；15, heat regenerative system.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly simple and clear, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
As shown in Figure 1, a kind of pollutant pre-corrosion tower based on flue gas condensing of this utility model, described pollutant pre-corrosion tower 4 is arranged between electrostatic precipitator and desulfurizing tower 7, its entrance is connected with electrostatic precipitator outlet by air-introduced machine or booster fan 9, outlet is connected with desulfurizing tower 7, and desulfurizing tower 7 exports and is connected with chimney 10.Pollutant pre-corrosion tower 4 is internally installed intensive condensation tube bank 1, and in described condensation tube bank 1, working medium is collected by upper collecting chamber 13 and lower header 14 and disperseed, and for preventing acidic liquid from corroding, condensation tube bank material therefor is fluorine plastic tube or the outer metal tube claiming fluoroplastics；Heat absorption working medium in condensation tube bank 1 is boiler feedwater or condensation water in aqueduct 8, and managing outer heat release working medium is flue gas.Being provided above spray equipment 3 in condensation tube bank 1, its spray water mist is alkali liquor, in order to neutralize the acidic liquid of generation, also reduces flue-gas temperature simultaneously, and induces in service intermittent mode and strengthen condensation process.Send into prime gas cooler or low-pressure heater or economizer as heat medium water after intraductal working medium heat absorption.Spray equipment 3 circulates Sedimentation tank 5 by pipeline with alkali liquor and is connected.Condensation tube bank 1 bottom is provided with aqueous alkali hydrops groove 2, for depositing spray aqueous alkali the acidic liquid that condenses out of collection.Desulfurizing tower 7 is internally provided with desulfurizing tower spraying layer 6 and desulfurization hydrops groove, and available limestone-gypsum method or other modes carry out desulfurization, and desulfurizing tower 7 is connected with chimney 10 by booster fan 9.
Work process of the present utility model is: flue gas enters gas cooler through economizer, air preheater, heat release cooling in gas cooler, enters electrostatic precipitator (electrostatic precipitation or sack cleaner), elimination major part PM, dust afterwards.Then pass through air-introduced machine or booster fan 9 enters pollutant pre-corrosion tower 4, with condensation water or boiler replenishing water generation heat exchange that condensation restrains in 1 about 20-38 DEG C.Steam cooling in flue gas condenses, sour gas SO2、Cl2、F2、NOXDeng with water react generation H2SO3、H2SO4, the acid solution such as HCl, HF, circulated collected by Sedimentation tank 5 by alkali liquor.Meanwhile, ammonia in flue gas gas can react with HF, such that it is able to elimination ammonia, it is prevented that the escaping of ammonia contaminated air, aggravates haze.Meanwhile, PM and dust meet the absorption of cold generation coalescence, and little granule dust coalescence becomes bulky grain, creates condition for its elimination in desulfurizing tower 7.Consequently, it is possible to partial contamination thing is removed in pollutant pre-corrosion tower 4, alleviate the pressure of follow-up desulfurizing tower and booster fan.Flue gas cools to 60 70 DEG C after condensation tube bank 1 heat release, and in-tube condensation water is warming up to more than 70 DEG C.When heat exchange is not enough, when cigarette temperature can not get fully reducing, opening spray equipment 3 and spray alkali liquor, reinforcement heat transfer is dropped first, and temperature is induced and strengthening condensation process, second can neutralize acidic liquid, and sprayed alkali liquor is circulated Sedimentation tank 5 by alkali liquor collects Posterior circle use.Afterwards, flue gas enters desulfurizing tower 7, further desulphurization denitration from pollutant pre-corrosion tower 4 upper outlet, and the flue gas after purification is discharged in air by chimney 10.
Claims (6)
1. based on the pollutant pre-corrosion tower of flue gas condensing, it is characterized in that: described pollutant pre-corrosion tower (4) is arranged between electrostatic precipitator and desulfurizing tower (7), its entrance is connected with electrostatic precipitator outlet by air-introduced machine or booster fan (9), outlet is connected with desulfurizing tower (7), and desulfurizing tower (7) outlet is connected with chimney (10)；Described pollutant pre-corrosion tower (4) is provided with condensation tube bank (1), condensation tube bank (1) is connected with aqueduct (8) by condensing tube bank outer circulating tube road (11), condensation tube bank (1) interior flow working medium is condense water or boiler replenishing water, feedwater in aqueduct (8), and water temperature is at 20-38 DEG C；Described condensation tube bank (1) is provided above spray equipment (3), and its spray liquid is alkali liquor, and ejecting liquid is induced in service intermittent mode and strengthens condensation process；Condensation tube bank (1) interior working medium and pipe outer flue gas heat exchange in pollutant pre-corrosion tower (4), water temperature sends into prime gas cooler or low-pressure heater or economizer as heat medium water after raising, and realizes removing part SO in advance in the way of condensation in pollutant pre-corrosion tower (4) tower simultaneouslyX、HCl、HF、NOXAnd dust, and remove NH simultaneously3, to alleviate pollutant removing intensity and the pressure of desulfurizing tower (7), reduce desulfurization island entirety energy consumption.
2. the pollutant pre-corrosion tower based on flue gas condensing according to claim 1, it is characterized in that: described spray equipment (3) is connected with aqueous alkali hydrops groove (2) in pollutant pre-corrosion tower (4), be connected with pollutant pre-corrosion tower (4) alkali liquor circulation Sedimentation tank (5) outward simultaneously；Described aqueous alkali hydrops groove (2) is for depositing spray aqueous alkali the acidic liquid that condenses out of collection.
3. the pollutant pre-corrosion tower based on flue gas condensing according to claim 1, it is characterized in that: described condensation tube bank (1) interior condensed water is warming up to more than 70 DEG C, when heat exchange is not enough, when cigarette temperature can not get fully reducing, open spray equipment (3) spray alkali liquor.
4. the pollutant pre-corrosion tower based on flue gas condensing according to claim 1, it is characterized in that: described condensation tube bank (1) be respectively arranged with upper collecting chamber (13) and lower header (14) up and down, be used for collecting and distributing condensed water.
5. the pollutant pre-corrosion tower based on flue gas condensing according to claim 1, it is characterised in that: described condensation tube bank (1) all adopts the metal tube of fluorine plastic tube or outer lining fluoroplastics.
6. the pollutant pre-corrosion tower based on flue gas condensing according to claim 1, it is characterised in that: described desulfurizing tower (7) is internally provided with desulfurizing tower spraying layer (6) and desulfurization hydrops groove, carries out desulfurization with limestone-gypsum method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620101051.8U CN205386406U (en) | 2016-02-01 | 2016-02-01 | Pollutant pretreater based on flue gas condensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620101051.8U CN205386406U (en) | 2016-02-01 | 2016-02-01 | Pollutant pretreater based on flue gas condensation |
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| Publication Number | Publication Date |
|---|---|
| CN205386406U true CN205386406U (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620101051.8U Withdrawn - After Issue CN205386406U (en) | 2016-02-01 | 2016-02-01 | Pollutant pretreater based on flue gas condensation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536484A (en) * | 2016-02-01 | 2016-05-04 | 西安交通大学 | Pollutant pretreating tower condensing based on flue gas |
| CN109420421A (en) * | 2017-08-22 | 2019-03-05 | 江苏佳鑫环保工程有限公司 | A kind of wet desulphurization processing unit |
| CN110668610A (en) * | 2019-11-07 | 2020-01-10 | 盛发环保科技（厦门）有限公司 | Desulfurization wastewater emission reduction and water quality treatment recycling process device |
-
2016
- 2016-02-01 CN CN201620101051.8U patent/CN205386406U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536484A (en) * | 2016-02-01 | 2016-05-04 | 西安交通大学 | Pollutant pretreating tower condensing based on flue gas |
| CN105536484B (en) * | 2016-02-01 | 2018-08-21 | 西安交通大学 | A kind of pollutant pre-corrosion tower based on flue gas condensing |
| CN109420421A (en) * | 2017-08-22 | 2019-03-05 | 江苏佳鑫环保工程有限公司 | A kind of wet desulphurization processing unit |
| CN110668610A (en) * | 2019-11-07 | 2020-01-10 | 盛发环保科技（厦门）有限公司 | Desulfurization wastewater emission reduction and water quality treatment recycling process device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160720 Effective date of abandoning: 20180821 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160720 Effective date of abandoning: 20180821 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |