CN106422615A - Electrostatic fabric filter for removing multiple pollutants in combined manner - Google Patents
Electrostatic fabric filter for removing multiple pollutants in combined manner Download PDFInfo
- Publication number
- CN106422615A CN106422615A CN201610623596.XA CN201610623596A CN106422615A CN 106422615 A CN106422615 A CN 106422615A CN 201610623596 A CN201610623596 A CN 201610623596A CN 106422615 A CN106422615 A CN 106422615A
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- electric
- dust collector
- bag
- storage tank
- gas
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- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 32
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 13
- 239000004744 fabric Substances 0.000 title abstract description 10
- 239000000428 dust Substances 0.000 claims abstract description 68
- 238000003860 storage Methods 0.000 claims abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003546 flue gas Substances 0.000 claims abstract description 35
- 238000010521 absorption reaction Methods 0.000 claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims abstract description 18
- 239000008187 granular material Substances 0.000 claims description 41
- 238000007599 discharging Methods 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 238000001914 filtration Methods 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 14
- 238000001179 sorption measurement Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 239000012159 carrier gas Substances 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000013459 approach Methods 0.000 claims description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 229940072033 potash Drugs 0.000 claims description 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 3
- 235000015320 potassium carbonate Nutrition 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 16
- 239000003245 coal Substances 0.000 abstract description 13
- 229910052753 mercury Inorganic materials 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000003795 desorption Methods 0.000 abstract 2
- 239000011817 metal compound particle Substances 0.000 abstract 2
- 238000005507 spraying Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 239000005864 Sulphur Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 235000012459 muffins Nutrition 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 208000001647 Renal Insufficiency Diseases 0.000 description 1
- 208000018569 Respiratory Tract disease Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 201000006370 kidney failure Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an electrostatic fabric filter for removing multiple pollutants in a combined manner. The electrostatic fabric filter comprises a particle spraying device, wherein the particle spraying device comprises a first storage tank, a second storage tank and a gas source; the outlet of the gas source is communicated with a spray pipe through a main pipeline, and the discharge outlet of the first storage tank and the discharge outlet of the second storage tank are connected with the main pipeline. The electrostatic fabric filter has the advantages that alkaline metal compound particles mutually attract physical absorption particles to allow activated carbon particles contain a certain amount of alkaline components, part of low-efficiency physical absorption is converted into efficient and stable chemical absorption, and SO3 desorption efficiency is further increased; meanwhile, the activated carbon particles and alkaline metal compound particles can absorb mercury and fine dust PM2.5 in flue gas, and the desorption efficiency of the mercury and fine dust PM2.5 is increased; the electrostatic fabric filter is low in operation cost, ultralow in emission, capable of synergically desorbing mercury and SO3 in the flue gas, and applicable to both common coal types and high-ash-content and high-sulfur-content coal types.
Description
Technical field
The present invention relates to dedusting technology field, more particularly to a kind of electric-bag complex dust collector of multi-pollutant joint removing.
Background technology
With the work such as developing rapidly for modern industry, especially coal-burning power plant, metallurgy, mine, cement and chemical industry, casting
The development of industry, causes the severe contamination of China's air, therefore also constrains China's expanding economy.Wherein, coal-burning power plant makes
The environmental pollution for becoming becomes one of matter of utmost importance that is urgently to be resolved hurrily now and controlling.
The pollutant discharged by coal-burning power plant mainly have flue dust, SOX、NOX, mercury and mercuric compounds etc..Wherein SO3Presence
Can cause the burn into flue gas opacity of power station equipment increase, the formation of acid rain the problems such as.Can more lead after being discharged in air
Cause respiratory tract disease.And hydrargyrum is bigger as a kind of harm of toxic heavy metal, renal failure, infringement nervous system after poisoning, can be caused
Etc. serious consequence.The pollution problem that although SO3 is caused with hydrargyrum gradually starts to be subject to people's attention, but country's pin at present
Less to the emission-reduction technology of SO3 in coal-burning power plant and hydrargyrum.
Although electric-bag complex dust collector is widely used to the discharge of Industrial cleaning facility flue gas, the electric bag of prior art
There is certain defect in complex dust collector.Such as, due to containing Bag filter link in its dedusting method, in dust removal process,
Dust can be gathered in muffin of the filter bag outer surface formation with large specific surface area, and muffin can be inhaled to multiple pollutant
Attached, to SO3Also there is higher capture rate.Especially, the sulphur content content in sulphur coal is higher, SO in the flue gas for generating that burns3Concentration is relatively
Height, as muffin is to SO3Act on certain removing, it will cause SO3In filter bag surface enrichment, so as to cause the corruption of filter bag
Erosion, the life-span declines.This causes sulphur coal be applied to electric-bag complex dust collector with sack cleaner.
Often strengthen the adsorption to hydrargyrum using activated carbon in electric-bag complex dust collector in prior art, although be also bound to
To SO3Act on removing.But activated carbon is for SO3Adsorption be weaker physical absorption, activated carbon is injected into and removes
After in dirt device, not long with the incorporation time of flue gas, only physical absorption differs surely makes SO3Concentration of emission be reduced to relatively low water
Flat.Meanwhile, the penetrating of activated carbon, can more cause SO3It is enriched with filter bag, so as to reduce life-span of the filter bag.
Also, the absorbability of activated carbon itself is certain, and SO3With hydrargyrum, equally all there is stronger adsorbed energy
Power, can produce absorption competition phenomenon.For high-sulfur coal, the SO in flue gas3Content is higher, is more prone to be tightly held by activated carbon,
Prior art electric-bag complex dust collector is made during demercuration, it is necessary to spray into more activated carbons to ensure demercuration efficiency, this is big
The cost of demercuration is improve greatly.
Therefore, need badly and design is optimized to electric-bag complex dust collector, so as to improve electric-bag complex dust collector to hydrargyrum, SO3
Deng the efficiency of dust collection of variety classes pollutant, reduce industrial cost, to meet the requirement of modern industry economical and energy saving environmental protection.
Content of the invention
The present invention provides a kind of electric-bag complex dust collector of multi-pollutant joint removing, including gas approach, dust settling pocket area,
Also include particle spray unit, the particle spray unit is included with lower component：
First storage tank, for storing physical absorption granule；
Second storage tank, for storing alkaline metal cpds granule；
Jet pipe, offers multiple nozzles along its length, and the jet pipe is arranged at the gas approach and dedusting filter
Between bag area；
Source of the gas, for providing delivery of carrier gas；The outlet of the source of the gas connects the jet pipe, first storage by main line
The discharging opening of tank, the discharging opening of second storage tank are all connected with the main line；
In the presence of carrier gas, the physical absorption granule of the main line and the alkaline metal cpds are fallen into
The mixture of grain is transported to the jet pipe, is sprayed by the nozzle.
Electric-bag complex dust collector in the present invention is provided with particle spray unit, when actual dedusting works, the granule spray
Activated carbon granule and metal alkaline compound are delivered to jet pipe by the way of air conveying by injection device source of the gas, by the spray of jet pipe
Hybrid particles are sprayed into mouth the front in dust settling pocket area, and delivery of carrier gas can use normal temperature compressed air, the temperature of gas from
Spray site is outwards gradually increased, until equal with flue-gas temperature.The process of physical absorption is considered as the process for liquefying, part area
The reduction of domain temperature, can improve SO in region3Degree of Liquefaction, that is, improve SO3Adsorbed efficiency.
Alkaline metal cpds granule can be adsorbed with activated carbon granule mutually so that also have certain content in activated carbon granule
Alkalinous metal composition, so as to physical absorption poorly efficient for part is converted into efficient, stable chemisorbed, further increase
Removing SO3Efficiency.At the same time, these activated carbon granules also have the hydrargyrum in absorption flue gas with alkaline metal cpds granule
Element and the ability of fine solid particle PM2.5, also improve the removal efficiency to both pollutant.
Subsequently, absorbent particles (activated carbon granule and alkaline metal cpds granule) can be blocked in outside cloth bag, outside
Face forms one layer of new dust layer, the new absorbent particles for adding due to not charged, can with script cloth bag outside due to dust
Fluffy dust layer that is charged and being formed interacts, and formation is finer and close, and hole is less, specific surface area bigger, absorbability
Higher new dust layer, becomes last layer of Adsorption of Mercury, SO3, PM2.5, " filter membrane " of the multi-pollutant such as dust, so as to again
Degree improves the efficiency for removing above multiple pollutant.
Due to being evenly distributed with alkaline components in dust layer, these alkaline components by with adsorbed SO3Reacted, raw
Become neutral slaine.These slaines will not cause corrosion to filter bag, can extend life-span of the filter bag with effective protection filter bag.
The cleaning cycle in electric-bag complex dust collector bag area is longer, and the time that these activated carbons have abundance with alkali metal rests on
The outer surface of filter bag, can reach very high utilization rate.
The technique can make electric-bag complex dust collector be applied to high sulphur content coal.Due to the SO that the burning of high sulphur content coal is produced3
Measure larger, SO3Concentration in flue gas is higher, it is easier to is trapped by filter bag and dust layer, causes SO3It is enriched with filter bag, causes
Filter bag corrodes.And the technique can be by the SO being enriched with outside filter bag3Neutralization, effective protection filter bag, make electric-bag complex dust collector applicable
In high sulphur content coal.
Technique removing SO3During, as efficient, stable chemisorbed accounts for leading, this makes most of SO3By alkali
Property composition is adsorbed, and can be prevented effectively from SO3Absorption competition is produced with hydrargyrum, the utilization rate of activated carbon is improved, multiple so as to improve electric bag
The efficiency of cleaner unit demercuration is closed, reduces operating cost.
Optionally, the alkaline metal cpds for storing in second storage tank are magnesium oxide, calcium oxide, magnesium hydroxide, hydrogen
One of calcium oxide, soda and potash or the mixture of a few persons.
Optionally, the physical absorption granule is activated carbon granule.
Optionally, the source of the gas includes blower fan, and the air inlet of the blower fan is connected with outside gas at normal temperature, and its air outlet is even
Lead to the discharging opening of first storage tank and the discharging opening of second storage tank.
Optionally, first flow valve is additionally provided between the discharging opening of first storage tank and the main line, described
One flow valve is used for controlling the flow of discharging opening physical absorption granule, so that the straying quatity of physical absorption granule meets dirt in flue gas
The 0.8-0.95 of the removal efficiency of dye thing.
Optionally, second flow valve is additionally provided between the discharging opening of second storage tank and the main line, described
Two flow valves be used for control discharging opening alkaline metal cpds flow so that the straying quatity of the alkaline metal cpds with
SO in flue gas3Content mol ratio be equal to or more than 1.
Optionally, the quantity of the jet pipe is at least one, and each jet pipe is set up in parallel to form adsorption zone, the absorption
The vertical flow of flue gas direction of area's plane, the injection direction of the nozzle is along flow of flue gas direction, and each jet pipe connects the master
Pipeline.
Optionally, the prime electric field region, the transition region, the lower section in the dust settling pocket area are provided with ash bucket.
Description of the drawings
Fig. 1 is the electric-bag complex dust collector structural representation of multi-pollutant joint removing in specific embodiment.
In Fig. 1：
Blower fan 1, the first storage tank 2, the second storage tank 3, main line 4, import loudspeaker 5, prime electric field region 6, ash bucket 7, middle mistake
Cross area 8, dedusting filtering bag area 9, filter bag 10, air-purifying chamber 11, outlet 12, positive plate 13, housing 14.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to Figure of description and specifically real
The present invention is described in further detail to apply mode.
Please show referring to the electric-bag complex dust collector structure that Fig. 1, Fig. 1 are multi-pollutant joint removing in present embodiment in the lump
It is intended to.
In the present invention, the electric-bag complex dust collector of multi-pollutant joint removing includes prime electric field region 6, dedusting filtering bag area 9,
Prime electric field region 6 is provided with positive plate 13, negative electrode (not shown), and negative electrode is used for carrying out the granule in flue gas charged, sun
Pole plate 13 is primarily served the purpose of and forms electric field with negative electrode, and acts the effect of gathering dust.
After dedusting filtering bag area 9 is located at prime electric field region 6, it is provided with by necessarily regularly arranged filter bag 10.Generally dedusting
Intermediate transition zone 8 is additionally provided between filter bag area 9 and prime electric field region 6, is provided with import loudspeaker 5, cigarette before prime electric field region 6
Gas is entered from import loudspeaker 5 inside the housing 14 of electric-bag complex dust collector, successively through prime electric field region 6, intermediate transition zone 8, is removed
Dirt filter bag area 9 flow to the exhanst gas outlet 12 of electric-bag complex dust collector, enters exterior line through exhanst gas outlet 12.Certainly, generally remove
9 top of dirt filter bag area is additionally provided with air-purifying chamber 11, and the flue gas in dedusting filtering bag area is again by exhanst gas outlet 12 after the purification of air-purifying chamber 11
Flow out.
Wherein dedusting filtering bag area 9 can be primary dust removing bag, it is also possible to arrange multistage dust settling pocket.
Electric-bag complex dust collector provided by the present invention is further provided with particle spray unit, the particle spray unit
Specifically include the first storage tank 2, the second storage tank 3, jet pipe, source of the gas.
Wherein the first storage tank 2 is used for storing physical absorption granule, herein so that physical absorption granule is as activated carbon granule as an example
Technical scheme is introduced, the second storage tank 3 is used for alkaline metal cpds granule to be stored, and jet pipe offers multiple sprays along its length
Mouth；Source of the gas is used for providing delivery of carrier gas, and the outlet of source of the gas connects jet pipe, the discharging opening and second of the first storage tank 2 by main line 4
Discharging opening connection main line 4, the i.e. discharging opening of the first storage tank 2 of storage tank 3, the discharging opening of the second storage tank 3 pass through first respectively
Road, the second branch road connection main line 4.Specifically, the discharging opening of the first storage tank 2, the second storage tank 3 discharging opening can also further
First flow valve, second flow valve are set, and first flow valve, second flow valve are respectively used to control the first storage tank 2, the second storage tank
3 grain flux.
In particle spray unit provided in this article, the first storage tank 2, the second storage tank 3, source of the gas can may be contained within electric bag again
The outside of shell of dust remover 14 is closed, only jet pipe is placed in the inside of electric-bag complex dust collector housing 14.Specifically, jet pipe can be placed in
After prime electric field region 6, before dedusting filtering bag area 9, i.e., jet pipe is preferentially positioned over intermediate transition zone 8.
When flue gas enters the electric-bag complex dust collector, prime electric field region 6, jet pipe area, dedusting filtering bag area 9 is sequentially passed through
Filtration, purification is acted on, and concrete flow of flue gas direction is refer in Fig. 1 shown in arrow.
Electric-bag complex dust collector in the present invention is provided with particle spray unit, when actual dedusting works, the granule spray
Activated carbon granule and metal alkaline compound are delivered to jet pipe by the way of air conveying by injection device source of the gas, by the spray of jet pipe
Before hybrid particles are sprayed into dedusting filtering bag area by mouth, delivery of carrier gas can use normal temperature compressed air, the temperature of gas from
Spray site is outwards gradually increased, until equal with flue-gas temperature.The process of physical absorption is considered as the process for liquefying, part area
The reduction of domain temperature, can improve SO in region3Degree of Liquefaction, that is, improve SO3Adsorbed efficiency.
Alkaline metal cpds granule can be adsorbed with activated carbon granule mutually so that also have certain content in activated carbon granule
Alkalinous metal composition, so as to physical absorption poorly efficient for part is converted into efficient, stable chemisorbed, further increase
Removing SO3Efficiency.At the same time, these activated carbon granules also have the hydrargyrum in absorption flue gas with alkaline metal cpds granule
Element and the ability of fine solid particle PM2.5, also improve the removal efficiency to both pollutant.
Subsequently, absorbent particles (activated carbon granule and alkaline metal cpds granule) can be blocked in outside cloth bag, outside
Face forms one layer of new dust layer, the new absorbent particles for adding due to not charged, can with script cloth bag outside due to dust
Fluffy dust layer that is charged and being formed interacts, and formation is finer and close, and hole is less, specific surface area bigger, absorbability
Higher new dust layer, becomes last layer of Adsorption of Mercury, SO3, PM2.5, " filter membrane " of the multi-pollutant such as dust, so as to again
Degree improves the efficiency for removing above multiple pollutant.
Due to being evenly distributed with alkaline components in dust layer, these alkaline components by with adsorbed SO3Reacted, raw
Become neutral slaine.These slaines will not cause corrosion to filter bag, can extend life-span of the filter bag with effective protection filter bag.
To sum up, the electric-bag complex dust collector operating cost is low, discharge ultralow, energy cooperation-removal mercury in flue gas and SO3, no
But it is applied to common coal, while being applicable to high ash, the electrostatic fabric filter of high sulphur content coal.
The cleaning cycle in electric-bag complex dust collector bag area is longer, and the time that these activated carbons have abundance with alkali metal rests on
The outer surface of filter bag, can reach very high utilization rate.
Electric-bag complex dust collector is applied to high sulphur content coal.Due to the SO that the burning of high sulphur content coal is produced3Measure larger, SO3?
Concentration in flue gas is higher, it is easier to is trapped by filter bag and dust layer, causes SO3It is enriched with filter bag, causes filter bag to corrode.And
The technique can be by the SO being enriched with outside filter bag3Neutralization, effective protection filter bag, make electric-bag complex dust collector be applicable to high sulphur content coal
Kind.
Technique removing SO3During, as efficient, stable chemisorbed accounts for leading, this makes most of SO3By alkali
Property composition is adsorbed, and can be prevented effectively from SO3Absorption competition is produced with hydrargyrum, the utilization rate of activated carbon is improved, multiple so as to improve electric bag
The efficiency of cleaner unit demercuration is closed, reduces operating cost.
SO it should be noted that at high operating temperatures, in flue gas3With gaseous state SO3Form exist, and work as temperature and be less than
After 200 DEG C, most SO3Will be with H2SO4In the form of, H2SO4According to the difference of temperature, it is divided into gaseous state H2SO4And liquid
H2SO4, in the application motion, by SO3With H2SO4It is referred to as SO3.
According to existing adsorption theory, the structure of adsorption molecule is more complicated, and boiling point is higher, and adsorbed ability is got over
By force.H2SO4Boiling point be 338 DEG C, the boiling point of hydrargyrum is that 356.7 DEG C, two kinds of boiling point substances are higher, belong to and are easier to adsorbed thing
Matter.
It should be noted that the species of physical absorption granule can be selected according to actual smoke condition, it is not limited to live
Property charcoal, need to only meet demercuration, except SO3Deng adsorption effect during pollutant and the economic feasibility of practical implementation.
The alkaline metal cpds for storing in second storage tank 3 are magnesium oxide, calcium oxide, magnesium hydroxide, calcium hydroxide, soda
With one of potash or the mixture of a few persons.Certainly, it is also not limited to listed above several herein.
Source of the gas in the various embodiments described above can include blower fan 1, and the air inlet of blower fan 1 is connected with outside gas at normal temperature, its
The air outlet connection discharging opening of the first storage tank 2 and the discharging opening of the second storage tank 3.I.e. blower fan 1 provides carrier gas transportation power, the structure
More convenient.
Installation site herein in connection with blower fan 1, the first storage tank 2, the second storage tank 3 is not specifically limited, as long as can realize
The above-mentioned technique effect of this paper.
First flow valve is provided between the discharging opening of the first storage tank 2 mentioned above and main line 4, and first flow valve is used for
The flow of control discharging opening physical absorption granule, first flow valve can be with hand-operated valve, or electrically-controlled valve, preferably electrically-controlled valve,
Electrically-controlled valve is advantageously implemented automatically controlling for system.Being required according to flue gas pollutant abjection, the aperture of first-class valve is set to control
System flows into the amount of the physical absorption granule in main line 4, such as in a kind of specific embodiment, control from the first storage tank 2
The aperture of first flow valve is so that the straying quatity of physical absorption granule meets the 0.8-0.95 of the removal efficiency of pollutant in flue gas.
SO in flue gas3Absorption mainly consider alkaline metal cpds injection amount.Second flow valve is used for controlling discharging opening
Alkaline metal cpds flow so that the straying quatity of the alkaline metal cpds and SO in flue gas3Content mol ratio
Equal to or more than 1.
That is, the ratio of physical absorption granule and alkaline metal cpds can be according to noxious substance in actual flue gas
Content and remove require set.
In a preferred embodiment, the quantity of jet pipe is at least one, and each jet pipe is set up in parallel to form adsorption zone,
The vertical flow of flue gas direction of adsorption zone plane, the injection direction of nozzle is along flow of flue gas direction, and each jet pipe connects main line 4.Should
Set-up mode is tried one's best and reduces the windage of flue gas transmit process, and demercuration, removal SO3Effect ratio with harmful substances such as PM2.5
Preferably.
In the respective embodiments described above, former electric field regions of electric-bag complex dust collector, transition region, the lower section in dedusting filtering bag area 9
Ash bucket 7 can be provided with, be deposited on electrode, jet pipe, the dust on filter bag and can fall into inside ash bucket 7, ash bucket 7 has and unloads
Grey mouth, removes from cinder-discharging port to the outside of electric-bag complex dust collector.
In addition, filter bag can be vertically arranged in dedusting filtering bag area 9, Open Side Down, it is easy to the cleaning of filter bag surface dirt.
The electric-bag complex dust collector for combining removing to multi-pollutant provided by the present invention above is described in detail.This
Specific example in text only for the present invention is set forth, and the explanation of above specific embodiment is only intended to help and understands this
The method and its core concept of invention.It should be pointed out that for those skilled in the art, without departing from this
On the premise of bright feature, some improvements and modifications can also be made, these improvements and modifications should also be considered as the protection of the present invention
Scope.
Claims (9)
1. the electric-bag complex dust collector that a kind of multi-pollutant joint is removed, including gas approach, dedusting filtering bag area (9), its feature
It is, also includes particle spray unit, the particle spray unit is included with lower component：
First storage tank (2), for storing physical absorption granule；
Second storage tank (3), for storing alkaline metal cpds granule；
Jet pipe, offers multiple nozzles along its length, and the jet pipe is arranged at the gas approach and the dedusting filtering bag area
(9) between；
Source of the gas, for providing delivery of carrier gas；The outlet of the source of the gas connects the jet pipe, first storage by main line (4)
The discharging opening of tank (2), the discharging opening of second storage tank (3) are all connected with the main line (4)；
In the presence of carrier gas, the physical absorption granule of the main line (4) and the alkaline metal cpds are fallen into
The mixture of grain is transported to the jet pipe, is sprayed by the nozzle.
2. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 1 is removed, it is characterised in that second storage
In tank (3), the alkaline metal cpds of storage are in magnesium oxide, calcium oxide, magnesium hydroxide, calcium hydroxide, soda and potash
Person or the mixture of a few persons.
3. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 1 is removed, it is characterised in that the physics is inhaled
Attached granule is activated carbon granule.
4. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 1 is removed, it is characterised in that the source of the gas bag
Blower fan (1) is included, the air inlet of blower fan (1) is connected with outside gas at normal temperature, its air outlet connects the first storage tank (2)
Discharging opening and the discharging opening of second storage tank (3).
5. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 1 is removed, it is characterised in that first storage
First flow valve is additionally provided between the discharging opening of tank (2) and the main line (4), and the first flow valve is used for controlling discharging
The flow of mouth physical absorption granule, so that the straying quatity of physical absorption granule meets the 0.8- of the removal efficiency of pollutant in flue gas
0.95.
6. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 1 is removed, it is characterised in that second storage
Second flow valve is additionally provided between the discharging opening of tank (3) and the main line (4), and the second flow valve is used for controlling discharging
The flow of the alkaline metal cpds of mouth, so that the straying quatity of the alkaline metal cpds and SO in flue gas3Content mole
Than being equal to or more than 1.
7. the electric-bag complex dust collector that the multi-pollutant joint as described in any one of claim 1 to 6 is removed, it is characterised in that
The quantity of the jet pipe is at least one, and each jet pipe is set up in parallel to form adsorption zone, the vertical flue gas of the adsorption zone plane
Flow direction, the injection direction of the nozzle is along flow of flue gas direction, and each jet pipe connects main line (4).
8. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 1 is removed, it is characterised in that many pollutions
Internet of Things closes the electric-bag complex dust collector that the electric-bag complex dust collector of removing combines removing for multi-pollutant, including prime electric field region
(6), described prime electric field region (6) be additionally provided with transition region (8) between dedusting filtering bag area (9), the granule injection dress
The jet pipe that puts is arranged at the transition region (8).
9. the electric-bag complex dust collector that multi-pollutant joint as claimed in claim 8 is removed, it is characterised in that the prime electricity
Place (6), the transition region (8), the lower section in the dedusting filtering bag area (9) are provided with ash bucket (7).
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| CN201610623596.XA CN106422615A (en) | 2016-08-02 | 2016-08-02 | Electrostatic fabric filter for removing multiple pollutants in combined manner |
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Family
ID=58184807
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