CN104645751A - Fine particulate wet capture system and technology thereof - Google Patents
Fine particulate wet capture system and technology thereof Download PDFInfo
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- CN104645751A CN104645751A CN201510019687.8A CN201510019687A CN104645751A CN 104645751 A CN104645751 A CN 104645751A CN 201510019687 A CN201510019687 A CN 201510019687A CN 104645751 A CN104645751 A CN 104645751A
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- demister
- slurry pool
- fine particulates
- spray
- wet method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- Treating Waste Gases (AREA)
Abstract
The invention provides a fine particulate wet capture system and a technology thereof. The fine particulate wet capture system comprises at least two sections of multistage spraying-demisting devices, wherein each section of the multistage spraying-demisting devices comprises a spray absorbing chamber, a demister, a slurry pool and a pollutant disengaging device; the spray absorbing chamber is divided into multiple stages by baffles arranged in a staggered way and each stage is internally provided with a spraying device; the demister is arranged at the tail part of the spray absorbing chamber, the slurry pool is arranged at bottom of the spray absorbing chamber and the bottom of the slurry pool is connected with the pollutant disengaging device; a smoke inlet is formed in the first section of the multistage spraying-demisting devices and a smoke outlet is formed in the last section of the multistage spraying-demisting devices. The system and the technology are capable of overcoming deficiencies of existing smoke fine particulate pollutant purification method, so that capture efficiency of fine particulates are greatly improved.
Description
Technical field
The invention belongs to purification of air and industrial flue gas cleaning technical field, particularly a kind of fine particulates wet method capture system and technique.
Background technology
In industrial processes, fine particulates is common atmosphere pollution, these particles with flue gas be discharged to after in air due to particle is small cannot gravitational settling, therefore can be suspended in air, form aerosol, thus environment and human body are worked the mischief, meanwhile, by having, to recycle be worth granular material discharged be also a kind of waste of resource.
The method of current removal fine particulates has the method such as dry method dust and wet dedusting, and dry method dust mainly contains electric cleaner and dust removal by filtration, electricity-bag dust collector etc., is generally used for more than 1 micron particle dedusting.Particle diameter is less than to the aerosol particle thing of 1 micron, the efficiency of dry method dust is generally less than 99%.Wet dedusting has venturi reactor and dynamic wave reactor etc., and SR is very large, and reach 5 ~ 10kPa, efficiency also only has 90% ~ 99%.
Summary of the invention
For overcoming the existing wet dedusting problem low to fine particulates capturing efficiency, the object of this invention is to provide a kind of fine particulates wet method capture system, increasing substantially the capturing efficiency of fine particulates.
For achieving the above object, the present invention is by the following technical solutions:
A kind of fine particulates wet method capture system, comprise at least two sections of multi-stage spray-demisters, every section of multi-stage spray-demister comprises spray absorber room, demister, slurry pool and pollutant and deviates from device, described spray absorber indoor are provided with sprayer unit, demister is arranged on the afterbody of spray absorber room, slurry pool is arranged on the bottom of spray absorber room, connects pollutant and deviate from device bottom slurry pool; First paragraph multi-stage spray-demister offers smoke inlet, and final stage multi-stage spray-demister offers exhanst gas outlet.Spraying-the demister system of leading portion is for trapping the pollutant in flue gas, and along with the prolongation of time, the pollutant be captured enrichment in slurries, is sprayed in flue gas again by spraying system, and part enters rear class by demister.Spraying-the demister system of back segment is for trapping the droplet also further particulate pollutant catching leading portion and fail to trap of leading portion escape.Overall arresting efficiency is increased substantially.Increase the droplet trapping spraying demist section of rear class, wet method efficiency can be increased to more than 99.99% from 90% ~ 99%.
Further, described spray absorber room is divided at least two-stage by baffle plate, and the wherein side of baffle plate is provided with opening, and adjacent baffle plate is crisscross arranged.
Further, sprayer unit is provided with in every grade of described spray absorber room.
Further, described sprayer unit is be arranged on the nozzle in side, spray absorber room and/or top inner wall.
Further, when the fine particulates caught is solid particle, described pollutant deviates from one or several combinations that device is settling tank, clarifier, hydrocyclone, filter.
Further, when the fine particulates caught is drop, described pollutant deviates from one or several combinations that device is the conventional treating apparatus such as stripping and air lift, extraction, crystallization.
Further, described multi-stage spray-demister is at least two sections, be respectively first paragraph multi-stage spray-demister and second segment multi-stage spray-demister, the spray absorber room of first paragraph multi-stage spray-demister is divided at least two-stage by the baffle plate of interlaced arrangement.The bottom of first paragraph multi-stage spray-demister is provided with the first slurry pool, and the bottom of second segment multi-stage spray-demister is provided with the second slurry pool can not have slurry pool yet.
Another object of the present invention is to provide a kind of fine particulates wet method catch process, and its technical scheme is:
A kind of fine particulates wet method catch process, adopt the form of at least two sections of multi-stage sprays-demister series connection, flue gas containing fine particulates is sprayed repeatedly, demist process, first paragraph multi-stage spray-demister is got liquid and is realized atomization by sprayer unit in the first slurry pool, for catching fine particulates, droplet falls into the first slurry pool again after demister demist, thus forms circulation; Second segment multi-stage spray-demister is got liquid and is realized atomization by sprayer unit in the second slurry pool, and for the purification containing dirty droplet and residual particles pollutant in flue gas, droplet falls into slurry pool again after demister demist, thus forms circulation; Spraying-demister hop count is more, and corresponding fine particulates removal efficiency is higher.
Further, second multi-stage spray-demister also can not be equipped with slurry pool, fresh water (FW) or recirculated water or other slurries are extracted by pump, atomization is realized by sprayer unit, for gas cleaning, droplet collects after demist, directly discharges second segment multi-stage spray-demister and flow to the first slurry pool or discharge whole system.
Further, when the liquid or solid particle caught is hydrophobicity, be added with activating agent in the slurries of described multi-stage spray-demister ejection, this activating agent is that wettable particle improves the hydrophilic medicament of particle.
Further, described activating agent be the still emulsifying agent of German FT625, stearic acid, NP-6, c-200, c-201 one or more with the mixture of arbitrary proportion.
Further, in the slurries of described multi-stage spray-demister ejection, be also added with flocculant, described flocculant be polymer alumina, polyacrylamide, aluminum sulfate, iron chloride one or more with the mixture of arbitrary proportion.
Further, the second slurry pool is lower than the concentration of fine particle and derivative thereof in the first slurry pool, more clean clean; The moisturizing of fine particulates wet method capture system is from the second slurry pool moisturizing, and the second slurry pool gives the first slurry pool moisturizing again by overflow or other modes.
After certain hour, particle enrichment in the first slurry pool of first paragraph multi-stage spray-demister trapping, after deviating from a device discharge part by pollutant, still part fine particulates is had to rest in processed flue gas, second segment multi-stage spray-demister is entered by demister together with the droplet being enriched pollutant, and be captured, thus enter the second slurry pool.Second slurry pool is lower than the concentration of fine particle and derivative thereof in the first slurry pool, more clean clean, and therefore second segment spraying has higher seizure cleaning performance.
If this system is only with one section of spraying trapping system, the pollutant trapped can concentrate in slurry pool, and part pollutant can come back to flue gas system by nebulisation cycle system.Adopt at least two sections of spraying-demister systems, the system of back segment can trap again to the residual particles pollutant of leading portion system and containing dirty droplet, and arresting efficiency can be brought up to more than 99.99% and even realize zero-emission.
Principle of the present invention is: in flue gas, spray into tens of droplet to hundreds of microns catch nano level fine particulates, because the fine mist sprayed into loses capturing ability very soon in flue gas, need by the changed course of flue gas or turn back and remove part droplet, droplet after changed course continues to catch fine particulates, again spray into droplet in flue gas simultaneously, carry out the seizure of next stage.Repetition like this, through multi-stage spray and changed course, can remove the fine particulates of the overwhelming majority, purifying smoke is discharged through demister.Due to the limited efficacy of demister, the droplet entrainment portions particle of escaping can reduce total fine particulates capturing efficiency, increase at least one section of spraying-demister system for this reason, spraying catches the droplet that first paragraph is escaped again, catch fine particulates residual in flue gas further simultaneously, the flue gas carrying a large amount of droplet again formed, through second segment demister, removes most droplet.In the droplet of second segment spraying, fine particle substrate concentration is lower than the concentration of fine particulates in first paragraph spraying droplet, after second segment demister, also have part droplet escape, but the particle concentration in droplet significantly reduces, thus achieve high fine particulates capturing efficiency.Because spray slurry recycles, the particle that spraying catches can be assembled concentrated in spray slurry, and therefore deviate from device by pollutant and discharged by particle in slurries, clear liquid returns.In order to improve filter efficiency, the medicaments such as flocculant can be added in the slurries before pollutant is deviate from, impelling and accelerating reunion and the sedimentation of fine particulates in slurries, improving separating power, reducing fine particle substrate concentration in slurries.
The beneficial effect of the invention: the present invention can overcome the deficiency of existing dust collection method, can increase substantially the capturing efficiency of fine particle pollutant.Owing to adopting above technical scheme, the capturing efficiency of fine particulates can be brought up to more than 99.99% and even realize zero-emission.
Accompanying drawing explanation
Fig. 1 is top view of the present invention;
Fig. 2 is side view of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
As depicted in figs. 1 and 2, a kind of fine particulates wet method capture system, comprise two sections of multi-stage spray-demisters, be respectively first paragraph multi-stage spray-demister 1 and second segment multi-stage spray-demister 2, first paragraph multi-stage spray-demister 1 offers smoke inlet 3, and second segment multi-stage spray-demister 2 offers exhanst gas outlet 4.
First paragraph multi-stage spray-demister 1 comprises the first spray absorber room 11, first demister 12, first slurry pool 13 and first pollution thing deviates from device 14, first spray absorber room 11 is divided into three grades by baffle plate 5, sprayer unit is provided with in first spray absorber room 11, first demister 12 is arranged on the afterbody of the first spray absorber room 11, first slurry pool 13 is arranged on the bottom of the first spray absorber room 11, connects first pollution thing and deviate from device 14 bottom the first slurry pool 13.
Second segment multi-stage spray-demister 2 comprises the second spray absorber room 21, second demister 22, second slurry pool 23 and the second pollutant deviates from device 24, second spray absorber room 21 is divided into two-stage by baffle plate 5, sprayer unit is provided with in second spray absorber room 21, second demister 22 is arranged on the afterbody of the second spray absorber room 21, second slurry pool 23 is arranged on the bottom of the second spray absorber room 21, connects the second pollutant and deviate from device 24 bottom the second slurry pool 23.
First slurry pool 13 and the second slurry pool 23 as a whole, be divided into two parts by baffle plate.
First spray absorber room 11 and the second spray absorber room 21 are divided at least two-stage by baffle plate 5, and the wherein side of baffle plate 5 is provided with opening, and adjacent baffle plate 5 is crisscross arranged.
Be provided with sprayer unit in first spray absorber room 11 and the second spray absorber room 21 every grade, sprayer unit is the nozzle 6 be arranged in side, spray absorber room or top inner wall, and the mist droplet particle size that sprayer unit sprays is 30 ~ 1000 microns.
The fine particulates wet method capture system in present embodiment is adopted to do following test:
Engineering is for the treatment of the low vacancy pollution lead fume produced during lead anode kitchen sink improving of lead.In smelting process, exhaust gas volumn is 150000m
3/ h, in flue gas, lead content reaches as high as 5000mg/m
3.
Flue gas lead fume is the fine particle thing produced in improving of lead process, and particle diameter is within the scope of 0.03 ~ 10 μm, and the distribution of its number concentration is in Unimodal Distribution, and mainly concentrate on 0.03 ~ 0.4 μm of particle size interval, peak value is between 0.2 ~ 0.3 μm.
Lead fume enters wet method capture system, the droplet sprayed at first paragraph multi-stage spray-demister and low pressure atomization nozzle contacts, after in droplet, activating agent contacts with tiny lead dust, improve lead dust hydrophobicity, accelerate lead dust to soak, impel it to be caught by drop and reunite and form large droplet settling to slurry pool, part droplet is rebuffed along sidewall landing at the place of turning back; Another part enters next stage, continues to be caught by next stage spraying.So repeated multiple times, most lead dust is caught by droplet.Flue gas, after multi-stage spray, arrives demist level, sloughs the droplet of the overwhelming majority, enter second segment multi-stage spray-demister in demist level.
After droplet catches fine particulates, serum recycle uses, and lead dust can enrichment in slurries, and the droplet of ejection can contain a large amount of fine particulates, due to first paragraph demister limited efficacy, carry fine particulates secretly from the droplet of first paragraph discharge and capturing efficiency can be caused lower.Therefore, caught the droplet of first paragraph escape by second segment multi-stage spray-demister, catch lead dust residual in flue gas further simultaneously.Second segment spraying-demister system spray absorber room is divided into three grades, and second segment arranges two-stage.
The lead dust part that first paragraph catches falls into slurry pool with droplet under spray absorber room baffle plate and the effect of demist level, in order to the particle be captured is discharged system in time, ensure that the droplet of ejection is to the capturing ability of particle, in slurries, add flocculant makes fine particle composition granule accelerate formation bulky grain sedimentation of reuniting, be enriched in bottom slurry pool, and realize Separation of Solid and Liquid by the slag remover be arranged on bottom slurry pool, lead skim sends into molten lead boiler recycling, crosses cleaner liquid and returns first paragraph spraying-demister system.
Flue gas is after first paragraph spraying-demist, and the concentration flowing through the flue gas lead dust of second segment is lower, and the lead dust concentration therefore in the second slurry pool is also significantly less than lead dust concentration in first paragraph slurry pool, has higher stage capturing efficiency.
After system and device of the present invention, neat stress concentration of emission is about 3mg/m
3, lower than national lead fume 8mg/m
3discharge standard, capturing efficiency reaches more than 99.99%.
The present embodiment nozzle adopts atomizer, and mist droplet particle size 50-500 μm, in Unimodal Distribution, peak value is at 200 μm.Spray velocity is 30-35m/s.Be added with activating agent and flocculant that concentration is 0.02%-0.5% in loop slurry respectively, activating agent is mainly used in the hydrophobicity improving lead dust surface, accelerates lead dust moistened surface; In slurries, flocculant is mainly used in accelerating the sedimentation of lead dust cluster of grains coalescence.
In the present embodiment, activating agent is the still emulsifying agent of German FT625, also can adopt stearic acid, NP-6, c-200, c-201, can choose one kind, also can adopt multiple with the mixture of arbitrary proportion; Flocculant is polymer alumina, also can adopt polyacrylamide, aluminum sulfate, iron chloride, can choose one kind, also can adopt multiple with the mixture of arbitrary proportion.
Demister adopts channel-type demister, for removing droplet entrained in flue gas.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand, the present invention is not restricted to the described embodiments, what describe in above-described embodiment and description just illustrates principle of the present invention, and without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications.Application claims protection domain is defined by appending claims, description and equivalent thereof.
Claims (10)
1. a fine particulates wet method capture system, it is characterized in that: the multi-stage spray-demister comprising at least two sections of series connection, first paragraph spraying-demister is for catching the fine particulates in flue gas, and back segment spraying-demister is for catching fine particulates residual in the absorbing liquid droplet and flue gas of escaping after leading portion demister; Every section of multi-stage spray-demister comprises pollutant in spray absorber room, demister, slurry pool and slurries and deviates from device, described spray absorber indoor are provided with sprayer unit, demister is arranged on the afterbody of spray absorber room, slurry pool is arranged on the bottom of spray absorber room, connects pollutant in slurries and deviate from device bottom slurry pool; First paragraph multi-stage spray-demister offers smoke inlet, and final stage multi-stage spray-demister offers exhanst gas outlet.
2. fine particulates wet method capture system as claimed in claim 1, it is characterized in that: the spray absorber room of described first paragraph multi-stage spray-demister is divided at least two-stage by baffle plate, and the wherein side of baffle plate is provided with opening, adjacent baffle plate is crisscross arranged.
3. fine particulates wet method capture system as claimed in claim 2, is characterized in that: be provided with sprayer unit in every one-level of described spray absorber room.
4. the fine particulates wet method capture system as described in claim 1 or 3, is characterized in that: described sprayer unit is be arranged on the nozzle on side, spray absorber room and/or top wall.
5. fine particulates wet method capture system as claimed in claim 1, it is characterized in that: when the fine particulates caught is solid particle, in described slurries, pollutant deviates from one or several combinations that device is settling tank, clarifier, hydrocyclone, filter.
6. fine particulates wet method capture system as claimed in claim 1, is characterized in that: when the fine particulates caught is drop, and in described slurries, pollutant deviates from one or several combinations that device is stripping and air lift, extraction, crystallization treatment device.
7. a fine particulates wet method catch process, it is characterized in that: first paragraph multi-stage spray-demister is got liquid and realized atomization by sprayer unit in the first slurry pool, for catching fine particulates, droplet falls into the first slurry pool again after demister demist, thus forms circulation; Second segment multi-stage spray-demister is got liquid and is realized atomization by sprayer unit in the second slurry pool, and for the purification containing dirty droplet and residual particles pollutant in flue gas, droplet falls into slurry pool again after demister demist, thus forms circulation; By that analogy.
8. fine particulates wet method catch process as claimed in claim 9, it is characterized in that: the second multi-stage spray-demister also can not be equipped with slurry pool, fresh water (FW) or recirculated water or other slurries are extracted by pump, atomization is realized by sprayer unit, for gas cleaning, droplet collects after demist, directly discharges second segment multi-stage spray-demister, flow to the first slurry pool or discharges whole system.
9. fine particulates wet method catch process as claimed in claim 9, it is characterized in that: when the liquid or solid particle caught is hydrophobicity, be added with activating agent in the slurries of described multi-stage spray-demister ejection, this activating agent is that wettable particle improves the hydrophilic medicament of particle.
10. fine particulates wet method catch process as claimed in claim 7, is characterized in that: the second slurry pool is lower than the concentration of fine particle and derivative thereof in the first slurry pool, more clean clean; The moisturizing of fine particulates wet method capture system is from the second slurry pool moisturizing, and the second slurry pool gives the first slurry pool moisturizing again by overflow or other modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019687.8A CN104645751A (en) | 2015-01-14 | 2015-01-14 | Fine particulate wet capture system and technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510019687.8A CN104645751A (en) | 2015-01-14 | 2015-01-14 | Fine particulate wet capture system and technology thereof |
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|---|---|
| CN104645751A true CN104645751A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510019687.8A Pending CN104645751A (en) | 2015-01-14 | 2015-01-14 | Fine particulate wet capture system and technology thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561710A (en) * | 2016-02-24 | 2016-05-11 | 徐景刚 | Efficient electronic-injecting haze-removing dust remover |
| CN106693511A (en) * | 2016-12-27 | 2017-05-24 | 奕工晨（天津）节能环保科技发展有限公司 | Power plant flue gas treatment device |
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|---|---|---|---|---|
| KR20010078909A (en) * | 2001-05-16 | 2001-08-22 | 류성춘 | Magnetic field soot purification water spray communication |
| CN202336272U (en) * | 2011-10-24 | 2012-07-18 | 江苏三环实业股份有限公司 | Lead fume chemical purification tower |
| CN203458930U (en) * | 2013-08-06 | 2014-03-05 | 浙江海亮能源管理有限公司 | Multistage spraying processing device for exhaust gas of printing and dyeing setting machine |
| CN204411978U (en) * | 2015-01-14 | 2015-06-24 | 江苏揽山环境科技有限公司 | A kind of fine particulates wet method capture system |
-
2015
- 2015-01-14 CN CN201510019687.8A patent/CN104645751A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010078909A (en) * | 2001-05-16 | 2001-08-22 | 류성춘 | Magnetic field soot purification water spray communication |
| CN202336272U (en) * | 2011-10-24 | 2012-07-18 | 江苏三环实业股份有限公司 | Lead fume chemical purification tower |
| CN203458930U (en) * | 2013-08-06 | 2014-03-05 | 浙江海亮能源管理有限公司 | Multistage spraying processing device for exhaust gas of printing and dyeing setting machine |
| CN204411978U (en) * | 2015-01-14 | 2015-06-24 | 江苏揽山环境科技有限公司 | A kind of fine particulates wet method capture system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561710A (en) * | 2016-02-24 | 2016-05-11 | 徐景刚 | Efficient electronic-injecting haze-removing dust remover |
| CN106693511A (en) * | 2016-12-27 | 2017-05-24 | 奕工晨（天津）节能环保科技发展有限公司 | Power plant flue gas treatment device |
| CN106693511B (en) * | 2016-12-27 | 2022-06-14 | 天津鹰麟管材设备有限公司 | Flue gas treatment device for power plant |
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Application publication date: 20150527 |