CN203916387U - A kind of flue gas device for deep cleaning - Google Patents
A kind of flue gas device for deep cleaning Download PDFInfo
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- CN203916387U CN203916387U CN201420207588.3U CN201420207588U CN203916387U CN 203916387 U CN203916387 U CN 203916387U CN 201420207588 U CN201420207588 U CN 201420207588U CN 203916387 U CN203916387 U CN 203916387U
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- flue gas
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- positive plate
- esp
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- 239000003546 flue gas Substances 0.000 title claims abstract description 108
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000004140 cleaning Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 230000003009 desulfurizing Effects 0.000 claims abstract description 31
- 239000000779 smoke Substances 0.000 claims abstract description 26
- 239000011148 porous material Substances 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims description 30
- 238000009826 distribution Methods 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 8
- 210000003660 Reticulum Anatomy 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 241001646071 Prioneris Species 0.000 claims description 4
- 229920004933 Terylene® Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000000875 corresponding Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 11
- 239000003344 environmental pollutant Substances 0.000 abstract description 9
- 231100000719 pollutant Toxicity 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- 239000010419 fine particle Substances 0.000 description 11
- 239000002253 acid Substances 0.000 description 9
- 238000006477 desulfuration reaction Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 230000005684 electric field Effects 0.000 description 6
- 239000003595 mist Substances 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 5
- 239000000443 aerosol Substances 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003500 flue dust Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000003750 conditioning Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 210000000481 Breast Anatomy 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N Calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- 241001365789 Oenanthe crocata Species 0.000 description 1
- 229910001245 Sb alloy Inorganic materials 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Abstract
The utility model relates to a kind of flue gas device for deep cleaning, belongs to flue gas pollutant purification technology field.A kind of flue gas device for deep cleaning of the utility model, comprises the heat exchanger (1), water smoke humidifying device (2), electric cleaner (4), desulfurizing tower (6), electric demister (9), Wet type electric dust-removing device (11), exhaust pass (15), the chimney (16) that are connected successively by pipeline; Described electric cleaner (4) is provided with high-frequency and high-voltage power supply (5); Described electric demister (9) is arranged on the top of desulfurizing tower (6); In described Wet type electric dust-removing device (11), be provided with the wet-esp positive plate (14) and the wet-esp cathode line (13) that are connected with high-frequency and high-voltage power supply (5); Described wet-esp positive plate (14) top is provided with the water distributor (20) of band water distributing pore (19).Adopt in the flue gas after device processes of the present utility model particle concentration lower than 5mg/m
3, PM2.5 is lower than 15ug/Nm
3, Hg is lower than 1ug/Nm
3, SO
3lower than 6ug/Nm
3.The utility model is applicable to large-scale industrialization application.
Description
Technical field:
The utility model relates to a kind of flue gas device for deep cleaning, belongs to flue gas pollutant purification technology field.
Technical background:
The haze weather that China day by day increases various places brings immeasurable impact to people's life health, and PM2.5 has caused social extensive concern thus.The main source that PM2.5 produces is the residue discharging through burning in the processes such as daily generating, industrial production, motor vehicle exhaust emission.Present stage, the electric energy of China 90% comes from thermal power generation, and thermal power generation and industrial production a large amount of coal that need to burn, the flue gas pollutant that coal-burning power plant and Industrial Boiler produce has become the main source of atmosphere pollution.
Along with people (comprise PM2.5 dust, SO to firepower coal-burning power plant and Industrial Boiler fine particle
3acid mist and aerosol etc.), the pay attention to day by day of the compound flue gas pollutant emission such as heavy metal Hg, VOC, the improvement of these combined pollutants also becomes the focus of international community's extensive concern, and developed country has carried out strict restriction to the discharge of PM2.5 fine particle mercury.In China, " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) specifies the dust emission limit value 30mg/m3 of coal-burning power plant, and 20mg/m3 is down in restriction for key area coal-burning power plant dust emission.
Existing flue gas pollutant cleaning equipment is mainly conventional electric cleaner and wet desulphurization device.Conventional electric cleaner is mainly used in removing the dust in flue gas.But, there is the low and reentrainment of dust problem of efficiency of dust collection in the electric cleaner of existing routine, its reason may be to enter the flue-gas temperature too high (being generally 150 DEG C of left and right) in electric cleaner, and the ratio too high in resistance of dust does not reach the perfect condition of electric precipitation work; The defect of the too high and existing electric cleaner self of flue-gas temperature causes it to be difficult to dust emission to be down to 20mg/m
3.Wet desulphurization device is mainly used in removing the sulfide in flue gas, and wet desulphurization device also has by self spraying the function of removing particle concurrently.But existing wet desulphurization device cannot solve the problem that fine particle pollutes, there is the problem such as gypsum rain, blue smoke in flue gas after desulfurizing tower, meanwhile, in the waste gas of discharging through desulfurizing tower exhaust outlet, also has a large amount of fine particle PM2.5, SO
3acid mist and aerosol.
Except said apparatus, there is researcher to study desulfurizing tower and wet-esp combination technique as patent 201110375475.5 patent 201110375902.X etc., in the gas that these devices are discharged, particle concentration can reach 20mg/m
3below.But these devices are difficult to accomplish particle concentration in discharged gas is controlled to 5mg/m
3below.
Utility model content
The weak point existing for existing flue gas pollutant cleaning equipment, the utility model provides a kind of flue gas device for deep cleaning and application; Effectively solve existing smoke purifying equipment to PM2.5 dust, SO
3the problem that the pollutant such as acid mist and aerosol cannot the degree of depth be removed.
A kind of flue gas device for deep cleaning of the utility model, comprises the heat exchanger (1), water smoke humidifying device (2), electric cleaner (4), desulfurizing tower (6), electric demister (9), Wet type electric dust-removing device (11), exhaust pass (15), the chimney (16) that are connected successively by pipeline; Described electric cleaner (4) is provided with high-frequency and high-voltage power supply (5); In described Wet type electric dust-removing device (11), be provided with the wet-esp positive plate (14) and the wet-esp cathode line (13) that are connected with high-frequency and high-voltage power supply (5); Described wet-esp positive plate (14) top is provided with the water distributor (20) of band water distributing pore (19); The outlet flue (28) of electric demister (9) enters mouth (29) higher than Wet type electric dust-removing device (11), and the outlet flue (28) of electric demister (9) is connected by flue with the mouth (29) that enters of Wet type electric dust-removing device (11).
A kind of flue gas device for deep cleaning of the utility model is provided with air-introduced machine between electric cleaner (4) and desulfurizing tower (6).
A kind of flue gas device for deep cleaning of the utility model, described heat exchanger (1) is selected from the one in plate-fin heat exchanger, tubular heat exchanger, plate wing tubulation composite heat exchanger.
A kind of flue gas device for deep cleaning of the utility model, described water smoke humidifying device (2) is provided with nozzle, and described nozzle is adjustable with respect to the angle of smoke dust duct direction, and described nozzle is micro-atomizing spray nozzle.
A kind of flue gas device for deep cleaning of the utility model, desulfurizing tower is established spray equipment in (6), when equipment work, sprays lime stone slurry the sour gas such as sulfur dioxide are absorbed by spray equipment, purify part dust simultaneously, and produce a large amount of calcium plaster drop and water smoke.
A kind of flue gas device for deep cleaning of the utility model, electric demister (9) enters vertical being connected of outlet flue (26) of mouth (27) and desulfurizing tower by electric demist.
A kind of flue gas device for deep cleaning of the utility model, is provided with electric demist positive plate (7) and electric demist cathode line (8) in described electric demister (9).
A kind of flue gas device for deep cleaning of the utility model, the equal vertical distribution of described electric demist cathode line (8) and electric demist positive plate (7) electric demister enter mouth (27) directly over.
A kind of flue gas device for deep cleaning of the utility model, in described electric demister (9), face mutually and electric demist positive plate (7) that plate face is relative between be provided with the electric demist cathode line (8) of radical >=1.In actual application, according to the amount of required smoke treatment in the unit interval, determine the quantity used of demist positive plate (7) and electric demist cathode line (8).Electricity demist cathode line (8), to the distance between adjacent electric demist positive plate (7), need to be adjusted according to practical operation.
A kind of flue gas device for deep cleaning of the utility model, in electric demister (9), electric demist positive plate (7) is arranged by honeycomb type or rectangular build.Face mutually and electric demist positive plate (7) that plate face is relative between distance need to adjust according to practical operation.
A kind of flue gas device for deep cleaning of the utility model, the line style of described electric demist cathode line (8) is selected from the one in barb type, needle-penetrating, sawtooth pattern.
A kind of flue gas device for deep cleaning of the utility model, the top of electric demister (9) is also provided with electricity except fog spray head (10), in the time of electric demister (9) smoke treatment, close electricity except fog spray head (10), after flue gas is disposed, opens shower nozzle electric demist positive plate (7), electric demist cathode line (8) are cleaned.
A kind of flue gas device for deep cleaning of the utility model, the outlet flue (28) of electric demister enters mouth (29) higher than Wet type electric dust-removing device, and the outlet flue (28) of electric demister is connected by bend pipe with the mouth (29) that enters of Wet type electric dust-removing device.
A kind of flue gas device for deep cleaning of the utility model, the equal vertical distribution of described wet-esp positive plate (14) and wet-esp cathode line (13) Wet type electric dust-removing device enter mouth (27) under.
A kind of flue gas device for deep cleaning of the utility model, in described Wet type electric dust-removing device (11), face mutually and wet-esp positive plate (14) that plate face is relative between be provided with the wet-esp cathode line (13) of radical >=1.In actual application, according to the amount of required smoke treatment in the unit interval, determine the quantity used of wet-esp positive plate (14) and wet-esp cathode line (13).Wet-esp cathode line (13), to the distance between adjacent wet-esp positive plate (14), need to be adjusted according to practical operation.
A kind of flue gas device for deep cleaning of the utility model, in Wet type electric dust-removing device (11), wet-esp positive plate (14) is arranged by honeycomb type or rectangular build.Face mutually and wet-esp positive plate (14) that plate face is relative between distance need to adjust according to practical operation.
A kind of flue gas device for deep cleaning of the utility model, the line style of wet-esp cathode line (13) is selected from the one in barb type, needle-penetrating, sawtooth pattern.
A kind of flue gas device for deep cleaning of the utility model, described wet-esp positive plate (14) top is provided with water distribution framework (18), water distribution framework is provided with water distributor (20), wet-esp positive plate (14) is fixed on water distributor (20) by being connected and fixed device (30), by the water distributing pore on water distributor (19), wet-esp positive plate (14) is carried out to water distribution, under the Action of Gravity Field of the water that water distributing pore (19) flows out by water and diffusion at the upper moisture film that forms of wet-esp positive plate (14).Water distributing pore (19) is 3-10cm to the distance of corresponding wet-esp positive plate (14); When Wet type electric dust-removing device (11) work, the streamflow in the upper per area per time of wet-esp positive plate (14) is 0.5-2m
3/ h.
A kind of flue gas device for deep cleaning of the utility model, the top of Wet type electric dust-removing device (11) is also provided with wet-esp shower nozzle (12), in the time of Wet type electric dust-removing device (11) smoke treatment, close wet-esp shower nozzle (12), after flue gas is disposed, close high-frequency and high-voltage power supply (5), open wet-esp shower nozzle (12) wet-esp positive plate (14), wet-esp cathode line (13) are cleaned.
A kind of flue gas device for deep cleaning of the utility model, the material of described electric demist positive plate (7) is selected from the one in stainless steel, Q235, SPCC, conductive terylene, conduction polypropylene fibre, conduction polytetrafluoroethylene (PTFE).
A kind of flue gas device for deep cleaning of the utility model, wet-esp positive plate (14) and the material of fixture (30) be all selected from the one in conductive terylene, conduction polypropylene fibre, conduction polytetrafluoroethylene (PTFE).By braiding, wet-esp positive plate (14) and fixture (30) are woven into an entirety, when use, fixture (30) is inserted in or is glued on the water distributor (20) with water distributing pore (19); Due to the water penetration of material used, make the water that water distributing pore (19) flows out above form moisture film by Action of Gravity Field and diffusion at wet-esp positive plate (14).
A kind of flue gas device for deep cleaning of the utility model, electric demist cathode line (8) is stainless steel or Pb-Sb alloy material with the material of wet-esp cathode line (13).
The application of a kind of flue gas device for deep cleaning of the utility model, sends into ash-laden gas after lowering the temperature in heat exchanger (1) and sends in water smoke humidifying device (2) and carry out humidification through gas approach (3); After humidification, send in the electric cleaner (4) with high-frequency and high-voltage power supply (5) and carry out electric precipitation, obtain smoke content≤20mg/m
3flue gas; By smoke content≤20mg/m
3flue gas send into and after desulfurization, send into demist in electric demister (9) in desulfurizing tower (6), flue gas after demist is admitted in Wet type electric dust-removing device (11) and processes, after finishing dealing with, through exhaust pass (15), chimney (16) discharge.
The application of a kind of flue gas device for deep cleaning of the utility model, described ash-laden gas is after denitration, dust concentration is more than or equal to 5g/Nm
3ash-laden gas.
The application of a kind of flue gas device for deep cleaning of the utility model, after heat exchanger (1) is processed, obtains temperature and is the ash-laden gas of 90-100 DEG C.
The application of a kind of flue gas device for deep cleaning of the utility model, after water smoke humidifying device (2) is processed, obtaining humidity is that 55%-75%, temperature are the humidification ash-laden gas of 85-95 DEG C.
The application of a kind of flue gas device for deep cleaning of the utility model, water smoke humidifying device (2) adopts hydraulic pressure micro-atomizing spray nozzle, makes water fogging to after below 20um, sprays into temperature and is in the ash-laden gas of 90-100 DEG C, obtains humidification ash-laden gas.
The application of a kind of flue gas device for deep cleaning of the utility model, when electric precipitation, the operating frequency range of high-frequency and high-voltage power supply used (5) is that 2000-4000Hz, operating voltage range are 7200-8000V.Electric dust collector makes dust granules in flue gas efficient charged and remove under the effect of high frequency electric source.
The application of a kind of flue gas device for deep cleaning of the utility model, when desulfurization, sprays lime stone slurry by spray equipment the sour gas such as sulfur dioxide is absorbed, and purifies part dust simultaneously, and produces a large amount of calcium plaster drop and water smoke; Obtain the flue dust after desulfurization.
The application of a kind of flue gas device for deep cleaning of the utility model, flue dust after desulfurization is through desulfurizing tower outlet flue, enter vertically upward in electric demister (9), under saturation vapour, remove fine particle by electric field action, drop in follow-up flue gas is greatly reduced, a large amount of fine particles, SO
3acid mist is purified; This has just been avoided the appearance of gypsum rain phenomenon.
The application of a kind of flue gas device for deep cleaning of the utility model, when flue gas after demist is admitted to and processes in Wet type electric dust-removing device (11), toward the upper water distribution of wet-esp positive plate (14), make the upper moisture film that forms of wet-esp positive plate (14) by water distributing pore (19); Water distribution had both ensured the humidity of flue gas, can take away in time again the fine particle, acid aerosol, the drop that are adsorbed on wet-esp positive plate (14), thereby greatly improve removal efficiency.
The application of a kind of flue gas device for deep cleaning of the utility model, when Wet type electric dust-removing device (11) work, the streamflow in the upper per area per time of wet-esp positive plate (14) is 0.5-2m
3/ h.
The application of a kind of flue gas device for deep cleaning of the utility model, in this device flue gas after treatment, dust concentration is lower than 5mg/m
3, PM2.5 is lower than 15ug/Nm
3, Hg is lower than 1ug/Nm
3, SO
3lower than 6ug/Nm
3.
The application of a kind of flue gas device for deep cleaning of the utility model, after flue gas is disposed, powered-down, opens wet-esp shower nozzle (12) wet-esp positive plate (14), wet-esp cathode line (13) is carried out to degree of depth cleaning.
The application of a kind of flue gas device for deep cleaning of the utility model, after flue gas is disposed, close high-frequency and high-voltage power supply (5), open the electric fog spray head (10) that removes electric demist positive plate (7), electric demist cathode line (8) are carried out to degree of depth cleaning.
Principle and advantage
1. by reducing the synergy of flue-gas temperature and spray humidification, dust specific resistance is reduced, electric precipitation flue-gas temperature is reduced to below flue gas acid dew point, make particle dust coacervating large particle dust, the heat energy being reclaimed by heat exchanger can be directly used in heating steamer device simultaneously, and this just improves the heat-economy of unit;
2. in electric cleaner, adopt high-frequency and high-voltage power supply, can provide higher corona voltage electric current with respect to common constant-current supply, improve the charged ability of dust, greatly improve efficiency of dust collection, compared with conventional electric cleaner scheme, can reduce by 1-2 electric field, save equipment investment cost; Adopt high voltage source to make dust granules move, be adsorbed onto on positive plate toward positive plate under electric field action, by dropping on ash bucket in rapping active set, make the concentration of particle in electric cleaner outlet flue place flue gas lower than 20mg/m
3; After electric cleaner is processed, the bulky grain in flue gas is removed greatly, and this has just reduced the running resistance of air-introduced machine, thereby reaches energy-conservation object;
3. by the electric demister above desulfurizing tower, solve the problem of gypsum raindrop; The spraying layer of desulfurizing tower can catch part dust by the effect of drop water smoke, be arranged on the electric demister of desulfurizing tower top, under saturation vapour, by electric field action, realize in removing fine particle and gypsum raindrop and also reduced dust-laden drop, fine particle, the SO in flue gas
3the content of acid mist;
4. at Wet type electric dust-removing device, water distributing pore is set,, makes to form moisture film on wet-esp positive plate toward water distribution on wet-esp positive plate by water distributing pore; Water distribution had both ensured the humidity of flue gas, can take away in time again the fine particle, acid aerosol, the drop that are adsorbed on wet-esp positive plate, thereby greatly improve removal efficiency; Realize superfine particulate matter is effectively trapped, make the concentration of particle in emptying flue dust lower than 5mg/m
3, PM2.5 is lower than 15ug/Nm
3.Because flue gas has obtained the purification of the degree of depth, so greatly reduce the extent of corrosion of flue gas to chimney.
In a word, the utility model passes through heat exchanger (1), water smoke humidifying device (2), electric cleaner (4), desulfurizing tower (6), electric demister (9), the inventive combination of Wet type electric dust-removing device (11), by the improvement to Wet type electric dust-removing device (11) and the use of high-frequency and high-voltage power supply, by Optimization Technology layout, realize flue gas conditioning, the demist of desulfurization electricity, the techniques such as wet-esp are carried out integrated application, pass through flue gas conditioning, the demist of desulfurization electricity, the synergy of wet-esp realizes fine particle minimum discharge, realize real near-zero release.
Brief description of the drawings
Accompanying drawing 1 is the utility model device therefor and annexation figure;
Accompanying drawing 2 is in accompanying drawing 1, the top view of A-A face;
Accompanying drawing 3 is in accompanying drawing 2, the cutaway view of B-B face;
In Fig. 1, 1 is heat exchanger, 2 is water smoke humidifying device, 3 is gas approach, 4 is electric cleaner, 5 is high-frequency and high-voltage power supply, 6 is desulfurizing tower, 7 is the positive plate of electric demister, 8 is the cathode line of electric demister, 9 is electric demister, 10 is the spray equipment of electric demister, 11 is Wet type electric dust-removing device, 12 is the spray equipment of Wet type electric dust-removing device, 13 is the cathode line of Wet type electric dust-removing device, 14 is the positive plate of Wet type electric dust-removing device, 15 is exhaust pass, 16 is chimney, 17 is ash bucket, 18 is water distribution framework, 21 enter mouth for heat exchanger, 22 is heat exchanger outlet flue, 23 enter mouth for electric cleaner, 24 is electric cleaner outlet flue, 25 enter mouth for desulfurizing tower, 26 is desulfurizing tower outlet flue, 27 enter mouth for electric demister, 28 is electric demister outlet flue, 29 enter mouth for Wet type electric dust-removing device.
In Fig. 2,13 is Wet type electric dust-removing device, and cathode line, 18 is water distribution framework.
In Fig. 3,18 is that the positive plate, 19 that water distribution framework, 14 is Wet type electric dust-removing device is that water distributing pore, 20 is water distributor, and 30 for being connected and fixed device.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the utility model is further illustrated;
In the present embodiment
Flue gas is the flue gas that 300MW heat power station produces, and the temperature of flue gas after denitration is that the concentration of particle in the flue gas after 145 DEG C, denitration is 45g/Nm
3; In the present embodiment, in the unit interval, the flue gas treating capacity of equipment is 1550000Nm
3/ h, flow velocity when flue gas enters heat exchanger (1) is 15m/s; Heat exchanger used (1) is H type fin tubing heat exchanger;
Electricity demist positive plate (7) is arranged by honeycomb type or rectangular build, and electric demist cathode line (8) is prickle wire, and its material is stainless steel, the rigid material that electric demist positive plate adopts stainless steel to make; The positive plate (14) of wet electrical dust precipitator is arranged by honeycomb type or rectangular build, the cathode line (13) of wet electrical dust precipitator is prickle wire, its material is stainless steel, the flexible material that the positive plate (14) of wet electrical dust precipitator adopts polypropylene fibre to make; Being connected and fixed device (30) adopts polypropylene fibre to make, by braiding, wet-esp positive plate (14) and fixture (30) are woven into an entirety, when use, fixture (30) is inserted in or is glued on the water distributor (20) with water distributing pore (19); Due to the water penetration of material used, make under Action of Gravity Field by water of water that water distributing pore (19) flows out and diffusion at the upper moisture film that forms of wet-esp positive plate (14);
As shown in Figure 1, heat exchanger (1) is arranged on the gas approach of electric cleaner (4) (3), between heat exchanger (1) and electric cleaner (4), water smoke humidifying device (2) is installed, purifying by denitration, the flue gas of discharging from boiler first reduces flue-gas temperature through over-heat-exchanger, spray into flue gas through the drop of atomization through the nozzle of water smoke humidifying device again, water smoke amount of humidification is 5m
3/ h, make it fully to contact with flue gas: on the one hand, flue gas is carried out to decreasing temperature and increasing humidity, wherein, controlled humidity is between 55%-75%, and flue-gas temperature, between 85-95 DEG C, grows up the dust granules reunion in flue gas, greatly improve dust granules charging performance, created the environment of more applicable electrostatic precipitation simultaneously;
Flue gas enters electric cleaner (4) afterwards, adopts the mode of two Room four electric fields, and positive plate is than dust-collecting area 110m
2/ m
3/ s,, power by high frequency electric source (5), the operating frequency range of high-frequency and high-voltage power supply: 2000-4000Hz, operating voltage range: 7200-8000V is effectively purified the dust in flue gas, with respect to conventional electric precipitation, and more energy-conservation and high-effective dust-removing; Flue gas, after electric cleaner (4) is processed, makes the concentration of particle in deduster outlet flue place flue gas lower than 20mg/m
3;
Flue gas after electric precipitation enters spray desulfurizing tower (6) and carries out desulfurization, and in desulfurizing tower, flue gas flow rate is 3m/s, and calcium sulfur ratio is 1.03, flue gas after desulfurization is by entering in electric demister (9) with the mouth (27) that enters along the vertical electric demister being connected in desulfurizing tower gas outlet (26), by the effect of electric field between the positive plate (9) of electric demister and the cathode line (8) of electric demister, most of sulphur gypsum drop and acid mist are removed, flue gas after electricity demist enters in Wet type electric dust-removing device (11) and processes through the outlet flue (28) of electric demister, when Wet type electric dust-removing device (11) work, streamflow in the upper per area per time of wet-esp positive plate (14) is 1m
3/ h, after finishing dealing with, enters in air through exhaust pass (15), chimney (16), and in the flue gas of chimney breast, particle concentration is lower than 5mg/m
3, PM2.5 is lower than 15ug/Nm
3, Hg is lower than 1ug/Nm
3, SO
3lower than 6ug/Nm
3.
Claims (10)
1. a flue gas device for deep cleaning, is characterized in that: comprise the heat exchanger (1), water smoke humidifying device (2), electric cleaner (4), desulfurizing tower (6), electric demister (9), Wet type electric dust-removing device (11), exhaust pass (15), the chimney (16) that are connected successively by pipeline; Described electric cleaner (4) is provided with high-frequency and high-voltage power supply (5); In described Wet type electric dust-removing device (11), be provided with the wet-esp positive plate (14) and the wet-esp cathode line (13) that are connected with high-frequency and high-voltage power supply (5); Described wet-esp positive plate (14) top is provided with the water distributor (20) of band water distributing pore (19); The outlet flue (28) of electric demister (9) enters mouth (29) higher than Wet type electric dust-removing device (11), and the outlet flue (28) of electric demister (9) is connected by flue with the mouth (29) that enters of Wet type electric dust-removing device (11).
2. a kind of flue gas device for deep cleaning according to claim 1, is characterized in that: described heat exchanger (1) is selected from the one in plate-fin heat exchanger, tubular heat exchanger, plate wing tubulation composite heat exchanger.
3. a kind of flue gas device for deep cleaning according to claim 1, is characterized in that: described water smoke humidifying device (2) is provided with nozzle, and described nozzle is adjustable with respect to the angle of smoke dust duct direction, described nozzle is micro-atomizing spray nozzle.
4. a kind of flue gas device for deep cleaning according to claim 1, is characterized in that: in described electric demister (9), be provided with electric demist positive plate (7) and electric demist cathode line (8); Described electric demist cathode line (8) and electric demist positive plate (7) all vertical distribution electric demister enter mouth (27) directly over.
5. a kind of flue gas device for deep cleaning according to claim 4, is characterized in that: in electric demister (9), electric demist positive plate (7) is arranged by honeycomb type or rectangular build; The line style of described electric demist cathode line (8) is selected from the one in barb type, needle-penetrating, sawtooth pattern.
6. a kind of flue gas device for deep cleaning according to claim 1, is characterized in that: described electric demister (9) is vertically mounted on the top of desulfurizing tower (6).
7. a kind of flue gas device for deep cleaning according to claim 6, is characterized in that: wet-esp positive plate (14) and wet-esp cathode line (13) all vertical distribution Wet type electric dust-removing device enter mouth (27) under.
8. a kind of flue gas device for deep cleaning according to claim 7, is characterized in that: in Wet type electric dust-removing device (11), wet-esp positive plate (14) is arranged by honeycomb type or rectangular build; The line style of wet-esp cathode line (13) is selected from the one in barb type, needle-penetrating, sawtooth pattern.
9. a kind of flue gas device for deep cleaning according to claim 1, it is characterized in that: described wet-esp positive plate (14) top is provided with water distribution framework (18), water distribution framework is provided with water distributor (20), and wet-esp positive plate (14) is fixed on water distributor (20) by being connected and fixed device (30); By the water distributing pore on water distributor (19), wet-esp positive plate (14) is carried out to water distribution, make the upper moisture film that forms of wet-esp positive plate (14); Water distributing pore (19) is 3-10cm to the vertical range of corresponding wet-esp positive plate (14).
10. a kind of flue gas device for deep cleaning according to claim 1, is characterized in that: wet-esp positive plate (14) and the material of fixture (30) be all selected from the one in conductive terylene, conduction polypropylene fibre, conduction polytetrafluoroethylene (PTFE).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933820A (en) * | 2014-04-25 | 2014-07-23 | 凯天环保科技股份有限公司 | Fuel gas deep-purification device and application thereof |
| CN104492244A (en) * | 2014-12-17 | 2015-04-08 | 国网上海市电力公司 | Waste-gas treating equipment |
| CN104791820A (en) * | 2015-04-28 | 2015-07-22 | 浙江大学 | Coal-fired flue gas pollutant ultralow emission system with rotary type GGH |
| CN105757700A (en) * | 2016-03-10 | 2016-07-13 | 程洪亮 | Flue environment-friendly processing tower |
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2014
- 2014-04-25 CN CN201420207588.3U patent/CN203916387U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933820A (en) * | 2014-04-25 | 2014-07-23 | 凯天环保科技股份有限公司 | Fuel gas deep-purification device and application thereof |
| CN103933820B (en) * | 2014-04-25 | 2015-10-28 | 凯天环保科技股份有限公司 | A kind of flue gas device for deep cleaning and application |
| CN104492244A (en) * | 2014-12-17 | 2015-04-08 | 国网上海市电力公司 | Waste-gas treating equipment |
| CN104791820A (en) * | 2015-04-28 | 2015-07-22 | 浙江大学 | Coal-fired flue gas pollutant ultralow emission system with rotary type GGH |
| CN105757700A (en) * | 2016-03-10 | 2016-07-13 | 程洪亮 | Flue environment-friendly processing tower |
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