CN102327719A - System and method for treating exhaust gas generated during varnish baking by using water for industrial cycle - Google Patents
System and method for treating exhaust gas generated during varnish baking by using water for industrial cycle Download PDFInfo
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- CN102327719A CN102327719A CN201110207583A CN201110207583A CN102327719A CN 102327719 A CN102327719 A CN 102327719A CN 201110207583 A CN201110207583 A CN 201110207583A CN 201110207583 A CN201110207583 A CN 201110207583A CN 102327719 A CN102327719 A CN 102327719A
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Abstract
The invention discloses a system and a method for treating exhaust gas generated during varnish baking by using water for industrial cycle. The system for treating the exhaust gas comprises a treating column, a spraying pipeline, a plasma device and a high attitude discharge air channel, wherein the treating column comprises a demisting layer, and an activated carbon adsorption layer. By adopting the technical scheme, the system for treating the exhaust gas generated during varnish baking washes exhaust gas circularly first to remove a large part of varnish particles and soluble organic solvent from the exhaust gas, secondary adsorption treatment is performed by using the activated carbon layer, and then the plasma treatment device treats the exhaust gas again to further remove the particles and organic matter from the exhaust gas, and the treatment efficiency is high. The water for industrial cycle is used, and exhaust gas is not needed to be preheated, so that energy sources are saved. The system has the advantages that: equipment is easy to install and can be flexibly controlled, and the system has long service life and occupies small floor space.
Description
Technical field
The present invention relates to the industrial waste gas field of waste water treatment, especially relate to a kind of exhaust treatment system and method for utilizing industrial circulate water to carry out.
Background technology
Baking vanish is used owing to its many excellent specific property that have as the process of surface treatment of materials such as a kind of metal more and more widely.Combined padding and drying system is used for spraying and toasting, and the baking vanish technological process is accomplished in combined padding and drying system.When spraying paint, deliver to the roof by blower fan behind the extraneous air process primary filter net filtration, purify the back through top screen pack secondary filter again and get in the room.Air adopts high-fall formula in the room, flows downward with the speed of 0.2-0.3m/s, the coating cloud particulate after spraying paint can not be stopped in air, and directly be discharged from outside the room through the bottom air outlet.Cyclic transformation so constantly makes when spraying paint that air cleanliness reaches more than 98% in the room, and the air of sending into has certain pressure, can around car, form a constant air-flow removing excessive paint, thereby guarantees the quality of spraying paint to greatest extent.
During baking vanish, air door is transferred to the baking vanish position, hot air circulation, temperature is elevated to predetermined baking temperature rapidly in the barn.After blower fan carries out prefiltration with fresh air outside; With the air chamber of delivering to the combined padding and drying system top after the heat converter generation heat exchange; Pass through filtration, purification for the second time again, hot blast is through the interior ringing of air door, except that the inspiration small amount of fresh air; Overwhelming majority hot-air is continued to add heat utilization again, makes the interior temperature of combined padding and drying system progressively raise.When temperature reached the temperature of setting, burner stopped automatically; When temperature drops to when temperature is set, blower fan and burner are opened again automatically, make that temperature keeps constant relatively in the combined padding and drying system.When the baking vanish time reached the time of setting, combined padding and drying system shut down automatically at last, and baking vanish finishes.
In this technical process, can produce a large amount of baking vanish waste gas; Contain paint vehicle particulate and other some chemical solvent gases in the waste gas; If directly be discharged in the air and can cause severe contamination, the solid particle in the effective processing of the needs one cover baking vanish waste gas and the treatment system of organic solvent.For example; On November 17th, 2010, disclosed CN201632175U Chinese patent specification just disclosed a kind of like this exhaust gas processing device; This device comprises numerical value vent gas treatment pipeline that is positioned at the tail gas air inlet and the tank that connects with said vent gas treatment pipeline couplet, and said vent gas treatment pipeline comprises along the tail gas circulating direction successively: water back, ultra violet lamp district and condensation chamber, and condensation chamber has the numerical value through hole; Its outer wall is connected with inlet pipeline; Inwall is provided with a plurality of mouth sprays, and in order to the tail gas that circulates in the vertical through hole is sprayed, the spray water recycles through water pump.Also be provided with filter below the condensation chamber.This exhaust gas processing device floor space is bigger, and power consumption is high owing to having preheating and ultra violet lamp link, in view of the characteristic of heterogeneity in the tail gas, depends washing alone can not it fully be handled in addition, still can pollute.
Other technologies at present commonly used have " medicine wash+spray+adsorb " technology, active carbon absorption technology etc., and the former needs a large amount of recirculated waters, and the outer draining of generation need carry out sewage disposal, and while exhaust-gas treatment particularly treatment of organic matters of organic is not efficient especially; Active carbon absorption technology need carry out preparatory dust removal process, needs active carbon equipment many, and integral device operating cost is high simultaneously, and adsorption efficiency is not high.
Summary of the invention
The purpose of this invention is to provide a kind of baking vanish exhaust treatment system that waste gas is effectively handled, floor space is little and energy-conservation that utilizes industrial circulate water that the baking vanish process is produced.
Technical scheme of the present invention is: a kind of baking vanish exhaust treatment system that utilizes industrial circulate water to carry out, comprise treating column, spray piping, plasma device and high altitude discharge air channel, and wherein treating column comprises demist layer, activated carbon adsorption layer.
Wherein spray piping is cemented in the treating column lateral wall and stretches into body of the tower inside, and the plasma device arrival end links to each other with the treating column top through the air channel, and the port of export links to each other with the high altitude discharge air channel.
Wherein the treating column bottom is provided with tank, and the sidewall bottom is provided with air inlet and discharge outlet, and the dome shape top is provided with activated carbon adsorption layer and Air-regulating valves, is provided with a plurality of demist layers in the treating column, and nethermost shower below is provided with graticule mesh in the body of the tower.The sidewall of treating column and dome shape top are provided with a plurality of inspection sockets.The tank top is provided with water pipe.
Spray piping stretches into the inner end of body of the tower, has a plurality of mouth sprays; The other end of spray piping links to each other through the tank of high pressure pipe pump with the treating column bottom outside the treating column body of the tower.
The inlet of said plasma device links to each other with the Air-regulating valves at treating column top through the air channel, and its outlet is connected to the inlet in high altitude discharge air channel through air-introduced machine.Air-introduced machine disposes the high voltage startup cabinet, and is furnished with earthing or grounding means.The top in high altitude discharge air channel is provided with lightning rod.
Utilize the method for the baking vanish exhaust-gas treatment that the above system carries out, its treatment step is:
(1) water pipe through the treating column bottom adds industrial circulate water in the treating column tank, and a certain amount of medicament of dissolving is opened high pressure pipe pump the solution in the tank is sent in the shower in the water, again by the spray of the spray apertures on the shower down;
(2) baking vanish waste gas gets into the treating column from the air inlet of treating column, and moving upward obtains the cleaning of spray solution, and particulate in the waste gas and solubilized composition get in the solution, get into tank again through graticule mesh;
(3) produce aqueous vapor in the process that solution is sprayed, remove through multilayer demist layer;
(4) residual gas after the spray washing rises to the treating column top, through the adsorption treatment of carrying out of activated carbon adsorption layer;
(5) gas of handling through activated carbon adsorption layer gets into plasma device through Air-regulating valves and air channel, carries out purified treatment once more, and the little of gas after the processing is sent in the high altitude discharge air channel through air-introduced machine, enters atmosphere again.
Above-mentioned industrial circulate water can refer to running water or other industrial wastewater treatment system reuse recirculated water.The industrial wastewater that is produced like the pickling pre-treatment production line in the bicycle manufacturing enterprise; Through the sewage disposal system advanced treating just can be used as in this exhaust treatment system recirculated water in addition circulated sprinkling use; The waste water of native system generation simultaneously can directly enter the pretreated sewage disposal system of pickling and handle, thereby reduces the consumption of fresh tap water.
Advantage and good effect that the present invention has are: owing to adopt technique scheme; This baking vanish exhaust treatment system is earlier to the waste gas washing that circulates; Remove wherein most of paint vehicle particulate and solubility organic solvent, handle through the active carbon layer second adsorption again, handle again through plasma treatment appts more at last; Further remove wherein particulate and organic matter, the treatment effeciency height is effective.Because what use is industrial circulate water, and does not need waste gas is carried out preheating, has saved the energy.This system also have equipment install simple, Equipment Control flexibly, long service life, advantage that floor space is little.
Description of drawings
Below in conjunction with accompanying drawing, the present invention is further specified.
Fig. 1 is the structural representation of this baking vanish exhaust treatment system.
Among the figure:
1, processing 2, Air-regulating valves 3, demist layer 4, activated carbon adsorption layer
5, inspection socket 6, graticule mesh 7, air inlet 8, discharge outlet
9, spray piping 10, water pipe 11, tank 12, high pressure pipe pump
13, air channel 14, plasma device 15, air-introduced machine 16, high altitude discharge air channel
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done and to further describe.
A kind of baking vanish exhaust treatment system that utilizes industrial circulate water to carry out of the present invention comprises treating column 1, spray piping 9, plasma device 14 and high altitude discharge air channel 16, and wherein treating column comprises demist layer 3, activated carbon adsorption layer 4.
Wherein spray piping 9 is cemented in treating column 1 lateral wall and stretches into body of the tower inside, and plasma device 14 arrival ends link to each other with treating column 1 top through air channel 13, and the port of export links to each other with high altitude discharge air channel 16.
Wherein treating column 1 bottom is provided with tank 11, and the sidewall bottom is provided with air inlet 7 and discharge outlet 8, and the dome shape top is provided with activated carbon adsorption layer 4 and Air-regulating valves 2, is provided with a plurality of demist layers 3 in the treating column 1, and nethermost shower below is provided with graticule mesh 6 in the body of the tower.The sidewall of treating column and dome shape top are provided with a plurality of inspection sockets 5.Tank 11 tops are provided with water pipe 10.
Spray piping 9 stretches into the inner end of body of the tower, has a plurality of mouth sprays; The other end of spray piping 9 links to each other with the tank 11 of treating column 1 bottom through high pressure pipe pump 12 outside treating column 1 body of the tower.
The inlet of said plasma device 14 links to each other with the Air-regulating valves 2 at treating column 1 top through air channel 13, and its outlet is connected to the inlet in high altitude discharge air channel 16 through air-introduced machine 15.Air-introduced machine 15 disposes the high voltage startup cabinet, and is furnished with earthing or grounding means.The top in high altitude discharge air channel 16 is provided with lightning rod.
Utilize the method for the baking vanish exhaust-gas treatment that the above system carries out, its treatment step is:
(1) water pipe 10 through the treating column bottom adds industrial circulate water in the tank 11 of treating column 1; A certain amount of medicament of dissolving in the water; Open high pressure pipe pump 12 solution in the tank 11 is sent in the spray piping 9, down by the spray of the spray apertures on the spray piping 9;
(2) baking vanish waste gas gets into the treating column 1 from the air inlet 7 of treating column 1, and moving upward obtains the cleaning of spray solution, and particulate in the waste gas and solubilized composition get in the solution, get into tank 11 again through graticule mesh 6;
(3) produce aqueous vapor in the process that solution is sprayed, remove through multilayer demist layer 3;
(4) residual gas after the spray washing rises to treating column 1 top, through the adsorption treatment of carrying out of activated carbon adsorption layer 4;
(5) gas of handling through activated carbon adsorption layer 4 gets into plasma device 14 through Air-regulating valves 2 and air channel 13, carries out purified treatment once more, and the little of gas after the processing is sent in the high altitude discharge air channel 16 through air-introduced machine 15, enters atmosphere again.
Above-mentioned industrial circulate water can refer to running water or other industrial wastewater treatment system reuse recirculated water.The industrial wastewater that is produced like the pickling pre-treatment production line in the bicycle manufacturing enterprise; Through the sewage disposal system advanced treating just can be used as in this exhaust treatment system recirculated water in addition circulated sprinkling use; The waste water of native system generation simultaneously can directly enter the pretreated sewage disposal system of pickling and handle, thereby reduces the consumption of fresh tap water.
Pass through treating column water pipe 10 adds capacity in tank 11 water during said system work, a certain amount of medicament of dissolving is opened high pressure pipe pump 12 solution in the tank 11 is sent in the shower 9 in the water, again by the spray of the spray apertures on the shower 9 down.Baking vanish waste gas gets into the treating column 1 from air inlet 7, and moving upward obtains the cleaning of spray solution, and particulate in the waste gas and solubilized composition get in the solution, get into tank 11 again through graticule mesh 6, so move in circles.Easily in the inner aqueous vapor that produces of treating column, cascade ring in the demist layer 3 or Pall ring can be removed aqueous vapor and make it liquefy, have guaranteed the effect of spray in the process that solution is sprayed.Residual gas after the spray washing rises to treating column 1 top, carries out adsorption treatment through activated carbon adsorption layer 4; Residual gas gets into plasma devices 14 through Air-regulating valves 2 and air channel 13 afterwards, carries out purified treatment once more by wherein plasma.Afterwards, last remaining little of gas is sent in the high altitude discharge air channel 16 through air-introduced machine 15, enters atmosphere again.For the Corrosion Protection that increases whole system, increase its service life, treating column 1 is selected carbon steel material for use, its surface brush twice lacquer.Galvanized iron material, inside lining anti-corrosive are adopted in air channel 13.Air-introduced machine 15 is through preservative treatment, and its impeller adopts explosion-proof processing, and air-introduced machine 15 also disposes high voltage startup cabinet and earthing or grounding means.For guaranteeing safety, the top in high altitude discharge air channel 16 also is provided with lightning rod.
Implementation result:
1. Bicycle Plant's baking vanish production line discharging waste gas situation
Particle in the waste gas: 50mg/m
3
Exhaust gas concentration: about 50ppm
EGT: spraying coating line normal temperature, drying line t:80 ℃
2. waste gas tolerance
According to the data that enterprise provides, every production line air quantity Q=49000m
3/ h, (7*7000m
3/ h), design total blast volume Q=245000m
3/ h.
3. design discharge index
Carry out " discharge standard of air pollutants " (GB16297-1996) middle secondary discharge standard.
Discharge index is following:
Particle :≤18mg/m
3, 0.51kg/h (dyestuff dirt) 15m discharging
Toluene :≤4.5mg/m
3
Xylenes :≤9.5mg/m
3
4. implementation result
| Litter | Discharge standard | Handle the back monitoring |
| Particle 50mg/m in the waste gas 3 | Particle :<=18mg/m 3 | Particle :<=14mg/m 3 |
| Toluene :<=4.5mg/m 3 | Toluene :<=2mg/m 3 | |
| Xylenes :<=9.5mg/m 3 | Xylenes :<=6mg/m 3 |
Through the monitoring contrast, can find out that the toxic emission of baking vanish production line reaches and be superior to the secondary discharge standard of " discharge standard of air pollutants " through implementing this exhaust treatment system.
Claims (8)
1. baking vanish exhaust treatment system that utilizes industrial circulate water to carry out, it is characterized in that: comprise treating column, spray piping, plasma device and high altitude discharge air channel, wherein treating column comprises demist layer, activated carbon adsorption layer.
2. according to the said treatment system of claim 1, it is characterized in that: spray piping is cemented in the treating column lateral wall and stretches into body of the tower inside, and the plasma device arrival end links to each other with the treating column top through the air channel, and the port of export links to each other with the high altitude discharge air channel.
3. according to the said treatment system of claim 1; It is characterized in that said treating column; The bottom is provided with tank, and the sidewall bottom is provided with air inlet and discharge outlet, and the dome shape top is provided with activated carbon adsorption layer and Air-regulating valves; Be provided with a plurality of demist layers in the treating column, nethermost shower below is provided with graticule mesh in the body of the tower.
4. according to the said treating column of claim 3, it is characterized in that sidewall and dome shape top are provided with a plurality of inspection sockets, the tank top of bottom is provided with water pipe.
5. according to the said treatment system of claim 2, it is characterized in that said spray piping stretches into the inner end of body of the tower, has a plurality of mouth sprays; The other end of spray piping links to each other through the tank of high pressure pipe pump with the treating column bottom outside the treating column body of the tower.
6. according to the said treatment system of claim 2; The inlet that it is characterized in that said plasma device links to each other with the Air-regulating valves at treating column top through the air channel; It exports the inlet that is connected to the high altitude discharge air channel through air-introduced machine, and wherein air-introduced machine disposes the high voltage startup cabinet, and is furnished with earthing or grounding means; The top in high altitude discharge air channel is provided with lightning rod.
7. according to each said system of claim 1-6, utilize the method for the baking vanish exhaust-gas treatment that this system carries out, its treatment step is:
(1) water pipe through the treating column bottom adds industrial circulate water in the treating column tank, and a certain amount of medicament of dissolving is opened high pressure pipe pump the solution in the tank is sent in the shower in the water, again by the spray of the spray apertures on the shower down;
(2) baking vanish waste gas gets into the treating column from the air inlet of treating column, and moving upward obtains the cleaning of spray solution, and particulate in the waste gas and solubilized composition get in the solution, get into tank again through graticule mesh;
(3) produce aqueous vapor in the process that solution is sprayed, remove through multilayer demist layer;
(4) residual gas after the spray washing rises to the treating column top, through the adsorption treatment of carrying out of activated carbon adsorption layer;
(5) gas of handling through activated carbon adsorption layer gets into plasma device through Air-regulating valves and air channel, carries out purified treatment once more, and the little of gas after the processing is sent in the high altitude discharge air channel through air-introduced machine, enters atmosphere again.
8. processing method according to claim 7, wherein said industrial circulate water can refer to running water or other industrial wastewater treatment system reuse recirculated water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110207583A CN102327719A (en) | 2011-07-23 | 2011-07-23 | System and method for treating exhaust gas generated during varnish baking by using water for industrial cycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110207583A CN102327719A (en) | 2011-07-23 | 2011-07-23 | System and method for treating exhaust gas generated during varnish baking by using water for industrial cycle |
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|---|---|
| CN102327719A true CN102327719A (en) | 2012-01-25 |
Family
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|---|---|---|---|
| CN201110207583A Pending CN102327719A (en) | 2011-07-23 | 2011-07-23 | System and method for treating exhaust gas generated during varnish baking by using water for industrial cycle |
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| CN102921278B (en) * | 2012-10-24 | 2015-04-29 | 环境保护部华南环境科学研究所 | Method for collaboratively controlling multi-pollutants produced from waste incineration smokes |
| CN103263817A (en) * | 2013-06-03 | 2013-08-28 | 胡乃正 | Gas purification device |
| CN105797512A (en) * | 2014-12-29 | 2016-07-27 | 廊坊华日家具股份有限公司 | Device for dust disposal |
| CN105056721A (en) * | 2015-07-24 | 2015-11-18 | 安徽红太阳新材料有限公司 | Novel waste rubber desulphurization waste gas three-stage energy-saving green treatment process method |
| CN105749714A (en) * | 2016-04-19 | 2016-07-13 | 中国石油化工股份有限公司 | Method and equipment for treating volatile organic compounds by coupling of adsorption and low-temperature plasmas |
| CN106621728A (en) * | 2016-11-21 | 2017-05-10 | 国佳环境科技湖北连锁有限公司 | Surface spray-coating waste gas treatment device and treatment method |
| CN108145083A (en) * | 2017-12-19 | 2018-06-12 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of dewaxing furnace wax cigarette abatement equipment |
| CN112387053A (en) * | 2020-11-27 | 2021-02-23 | 天津绿之本生物科技有限公司 | Spraying dust removal tower capable of efficiently removing dust |
| CN112387053B (en) * | 2020-11-27 | 2024-01-02 | 天津绿之本生物科技有限公司 | Spray dedusting tower capable of efficiently dedusting |
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Application publication date: 20120125 |