CN104083988A - VOCs (volatile organic compounds) waste gas treatment method - Google Patents

VOCs (volatile organic compounds) waste gas treatment method Download PDF

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Publication number
CN104083988A
CN104083988A CN201410311818.5A CN201410311818A CN104083988A CN 104083988 A CN104083988 A CN 104083988A CN 201410311818 A CN201410311818 A CN 201410311818A CN 104083988 A CN104083988 A CN 104083988A
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vocs
waste gas
treatment
organic matter
exhaust gas
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CN201410311818.5A
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Chinese (zh)
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CN104083988B (en
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蔡祥雨
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蔡祥雨
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/002Separation 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 condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/04Separation 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 stationary adsorbents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/32Separation 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 electrical effects other than those provided for in group B01D61/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/44Organic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84Biological processes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention relates to a VOCs (volatile organic compounds) waste gas treatment method. The treatment method comprises the following steps: a step of treating organic matters: carrying out organic matter treatment on waste gas generated by a VOCs waste gas source, wherein the treatment for the organic matters is to remove VOCs in the waste gas by adopting one or a combined method of an absorption recycling method, an adsorption recycling method, a condensation recycling method, a burning method, a catalytic burning method, a plasma method and a biological method; a step of recycling the tail gas: returning the waste gas after the organic matter treatment to the VOCs waste gas source. By adopting the VOCs waste gas treatment method, zero emission of VOCs waste gas is realized, the technical difficulty in realizing zero emission of VOCs waste gas, which needs to be solved but still can not be solved by environment protection equipment manufacturing enterprises for years, can be solved, and the environmental pollution caused by the emission of the VOCs waste gas can be thoroughly eliminated; the entire treatment process is simple and easy to operate, the treatment efficiency is high, few equipment is needed, the energy consumption of equipment is small, the requirement of modern enterprises on energy conservation, emission reduction and production effectiveness improvement can be well satisfied, and great significance on saving the energy and reducing the cost can be achieved.

Description

A kind of VOCs waste gas processing method
Technical field
The present invention relates to environment protection treating technical field, is a kind of VOCs waste gas processing method specifically.
Background technology
As everyone knows, PM2.5 (fine particle), haze weather are day by day serious on the people's life and healthy impact, and VOCs (VOC) is one of main composition factor making PM2.5 concentration abnormality, the total release of current industrial VOCs has reached the level of more than 2,000 ten thousand tons/year.In various occasions with an organic solvent, as spray paint, the processing place such as printing, metal degreasing and degreasing, adhesive, pharmacy, plastics, rubber, oil, VOC (being called for short VOCs) is all at contaminated air.People by various removal volatile solvents (as condensation method, absorption method, absorption process, combustion method, bioanalysis, membrane separation process, plasma method, photocatalytic oxidation) pollution control technology on, although treatment system and method are constantly updated, clearance or the rate of recovery improve constantly (method having is up to more than 98%), but always there is the discharge of remaining VOCs, be more can not qualified discharge, the dirty gas disposal method having even also can produce secondary pollution.Along with the further increasing of government to air contaminant treatment supervision, the discharge standard of various places, every profession and trade further improves, and makes the processing limit of existing treatment system and method be difficult to adapt to the discharge standard requirement improving constantly.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, technical problem to be solved by this invention is to provide a kind of VOCs waste gas processing method of the VOCs of realization zero waste gas emission.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A VOCs waste gas processing method, comprising:
Organic matter treatment step: the waste gas that VOCs exhaust gas source is produced carries out organic matter processing, described organic matter is treated to and adopts one or more the combined method absorbing in absorption method, absorption absorption method, condensation absorption method, burning method, catalytic burning method, plasma method and bioanalysis to remove the VOCs in waste gas;
Tail gas recycle step: the waste gas after organic matter is processed returns to VOCs exhaust gas source.
Beneficial effect of the present invention is:
Realized the zero-emission of VOCs waste gas, overcome that equipment manufacture of environmental protection enterprise wants to solve for many years and the technical barrier of unsolved VOCs zero waste gas emission has thoroughly been eliminated the exhaust emission of VOCs waste gas to environment; Whole processing procedure is simple to operation, treatment effeciency is high, equipment needed thereby is few, and equipment energy consumption is low, has well met the requirement of modern enterprise to energy-saving and emission-reduction, raising productivity effect, reduces cost be significant to economizing on resources.
Accompanying drawing explanation
Figure 1 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 1.
Figure 2 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 2.
Figure 3 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 4.
Figure 4 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 5.
Figure 5 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 6.
Figure 6 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 7.
Figure 7 shows that the structure flow chart of the VOCs exhaust treatment system of the embodiment of the present invention 8.
Label declaration:
1-coating cloud treating apparatus; 2-organic matter treating apparatus; 3-blower fan; 4-tail gas recycle pipeline; 5-VOCs exhaust gas source; 6-waste residue gathering-device; 7-organic solvent collecting device; 8-air compensating device; 9-air quality adjusting device; 10-the second blower fan; 11-filter; 12-cooling device.
The specific embodiment
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
The design of most critical of the present invention is: by the waste gas that VOCs exhaust gas source is produced, through organic matter, process, remove or reclaim VOCs most in VOCs waste gas, then tail gas after significantly reducing the processing of VOCs content (is compared with the waste gas that VOCs exhaust gas source produces, VOCs content contained in this tail gas can be ignored, this tail gas can be considered fresh air) return to VOCs exhaust gas source and replace the high-concentration waste gas in exhaust gas source, high-concentration waste gas after replacement is proceeded to remove VOCs and is processed, its exhaust gas concentration that keeps exhaust gas source region is not further raise, make VOCs waste gas no longer to extraneous environmental emission, thereby realize the zero-emission of VOCs waste gas, the pollution that thoroughly after Processing for removing, still the discharge of the VOCs waste gas of residual minim brings environment, whole processing procedure is simple to operation, treatment effeciency is high, equipment needed thereby is few, equipment energy consumption is low, well met modern enterprise to energy-saving and emission-reduction, improve the requirement of productivity effect, to economizing on resources, reducing cost is significant.
Embodiment 1
Please refer to shown in Fig. 1, the VOCs exhaust treatment system of the present embodiment 1, comprise organic matter treating apparatus 2, blower fan 3 and tail gas recycle pipeline 4 for removing VOCs, the combination of wherein one or more devices that described organic matter treating apparatus 2 adopts for existing absorption absorption method, absorption absorption method, condensation absorption method, burning method, catalytic burning method, plasma method or bioanalysis.
Described organic matter treating apparatus 2 is connected successively with tail gas recycle pipeline 4, the outlet side of the inlet end of described organic matter treating apparatus 2 and tail gas recycle pipeline 4 is connected with VOCs exhaust gas source 5 respectively, described VOCs exhaust gas source 5, organic matter treating apparatus 2 and tail gas recycle pipeline 4 form a closed loop (scheme for exhaust gas circulation system), and described blower fan 3 is arranged on described closed loop.
Described VOCs exhaust gas source 5, can be equipment or the place that produces arbitrarily VOCs waste gas, such as the equipment such as between paint spray booth, drying room, canning cart, cloth coating, artificial leather coating, adhesive article gluing, coating, print, reel off raw silk from cocoons, the places such as workshop at the device fabrication line such as calendering and place thereof.That is to say that VOCs exhaust treatment system provided by the present invention and processing method can be applied to equipment or the place of any generation VOCs waste gas.In processing procedure, the waste gas that VOCs exhaust gas source 5 produces circulates in closed loop, and reduce, is discharged in external environment.VOCs exhaust gas source 5 is interior can also arrange pollutant pre-corrosion device, if particle expansion chamber, outlet port filter, water screen apparatus, water shower device etc. are for removing the facility of exhaust emission, and the be more convenient for facility of subsequent treatment of the adjusting waste gas such as cooling device, heater.
Described blower fan 3 can arrange one or more, and the position of setting is so long as on closed loop.
Shown in Fig. 1, the VOCs waste gas processing method of the present embodiment 1 is as follows:
1, the waste gas that VOCs exhaust gas source 5 is produced is introduced in organic matter treating apparatus 2 by blower fan 3, absorption through organic matter treating apparatus 2, the methods such as absorption or burning (comprise absorption absorption method, absorption absorption method, condensation absorption method, burning method, catalytic burning method, plasma method and bioanalysis) process after, a large amount of VOCs contained in waste gas are removed, by the organic solvent absorbing or suction type is collected, can reclaim and subsequent treatment by organic solvent collecting device 7, described organic solvent collecting device 7 can be separated from solvent groove or solvent tank, also solvent equipment for purifying,
2, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source produces, VOCs content contained in this tail gas can be ignored, can be considered fresh air, under the effect of blower fan 3, return to VOCs exhaust gas source 5 and circulate and replace out the high concentration VOCS waste gas in exhaust gas source.
From foregoing description, beneficial effect of the present invention is: realized the zero-emission of VOCs waste gas, solved existing waste gas pollution control and treatment technology and be difficult to reach the discharge standard requirement improving constantly, thoroughly eliminated the exhaust emission of VOCs waste gas to environment; Whole processing procedure is simple to operation, treatment effeciency is high, equipment needed thereby is few, and equipment energy consumption is low, has well met the requirement of modern enterprise to energy-saving and emission-reduction, raising productivity effect, reduces cost be significant to economizing on resources.
Further, according to each position requirement to air-inlet conditions such as wind speed, wind directions in VOCs exhaust gas source 5, such as requiring the air inlet of distribution plenum, paint spray booth can not affect jet velocity and the jet direction of spray gun, in order to avoid affect the even of lacquered surface film thickness, the present embodiment 1 also can be provided with air-distribution device on the outlet side of tail gas recycle pipeline 4, the object of described air-distribution device, while being to make tail gas access VOCs exhaust gas source 5, by air-distribution device, distribute wind speed and the airflow direction of each position, meet the requirement of each position to air-inlet condition and waste gas replacement in VOCs exhaust gas source 5.
Further, because gas exists certain negative pressuren zone or zone of positive pressure in whole exhaust treatment system, for changing, the gas volume that the conditions such as pressure, temperature are caused compensates, the present embodiment 1 is also provided with air compensating device 8 between the outlet side of organic matter treating apparatus 2 and VOCs exhaust gas source 5, described air compensating device 8 by passing into or discharge a certain amount of air in closed loop, with alleviate or eliminate in whole exhaust treatment system, exist because negative pressure or malleation cause the problem of changes in air volume, assurance system is stably operation normally.
Further, because different production technologies or production equipment are to the quality requirement of air different (such as paint spray booth and drying room have certain requirement to the temperature and humidity of air), the processing method of organic matter treating apparatus is different (such as processing method is for absorbing, absorption or burn) and the boiling point of organic solvent not equal, in order to obtain better exhaust-gas treatment effect, improve the operation stability and the requirement that meets various processes or production equipment of whole system, the present invention has also done further improvement to VOCs exhaust treatment system and processing method, below on the basis of embodiment 1, continuing to enumerate embodiment is described as follows:
Embodiment 2
When organic matter treating apparatus 2 is for including the absorbing recovery device of adsorption tanks, when method for treating organic material is absorption VOCs:
Please refer to shown in Fig. 2, on the basis of embodiment 1, the VOCs exhaust treatment system of the present embodiment 2, also comprises adsorption system, desorption system, condenser system and the piece-rate system of adsorbing absorption method, and the adsorption tanks of the second blower fan 10 dehumidify, cooling system.
Described the second blower fan 10 is connected with the adsorption tanks of organic matter treating apparatus 2, offers cooling and dehumidifying passage on adsorption tanks, and one end of described cooling and dehumidifying passage is connected with the second blower fan 10, and the other end of described cooling and dehumidifying passage is connected with the external world.
Shown in Fig. 2, the VOCs waste gas processing method of the present embodiment 2 is as follows:
1, waste gas VOCs exhaust gas source 5 being produced is introduced in organic matter treating apparatus 2 by blower fan 3, after the adsorption treatment of organic matter treating apparatus 2, VOCs contained in waste gas is removed in a large number, the organic solvent of collecting by suction type can reclaim by organic solvent collecting device 7, and described organic solvent collecting device 7 can be separated from solvent groove, solvent tank or solvent purifying device;
In organic matter processing procedure, because the temperature of adsorption tanks after desorption completes is higher, and there is water vapour, when if temperature and humidity causes adverse effect to production equipment (VOCs exhaust gas source 5), need to carry out cooling and dehumidifying by 10 pairs of adsorption tanks of the second blower fan, gas after cooling and dehumidifying, directly discharged in the air, is not back in VOCs exhaust gas source 5.
2, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source 5 produces, VOCs content contained in this tail gas can be ignored, can be considered fresh air, under the effect of blower fan 3, return to VOCs exhaust gas source 5 and replace the high-concentration waste gas in exhaust gas source, the outer row of high-concentration waste gas after replacement goes VOCs to process, and its exhaust gas concentration that keeps exhaust gas source region is not further raise.
Embodiment 3
When organic matter treating apparatus 2 is for absorbing or burn the organic matter treating apparatus 2 of VOCs, when method for treating organic material is absorption or burning VOCs:
Can adopt VOCs exhaust treatment system as shown in Figure 1, processing method can be with reference to described in embodiment 1.
This embodiment 3 is with the difference of embodiment 2, does not comprise the second blower fan 10.
Embodiment 4
When the quality of 5 pairs of air of VOCs exhaust gas source has specific (special) requirements or organic matter treating apparatus 2 air quality out can not adapt to 5 pairs of api requests of exhaust gas source:
Please refer to shown in Fig. 3, on the basis of embodiment 1, the VOCs exhaust treatment system of the present embodiment 4, also comprises air quality adjusting device 9.
Described air quality adjusting device 9 is arranged between the outlet side of organic matter treating apparatus 2 and the inlet end of VOCs exhaust gas source 5, described air quality adjusting device 9 can be selected according to the specific requirement of 5 pairs of air qualities of VOCs exhaust gas source, such as the temperature and humidity of 5 pairs of air of VOCs exhaust gas source has requirement, air quality adjusting device 9 can comprise air temperature modification unit and/or air humidity regulon, through the adjusting of air quality adjusting device 9, the gas that makes to enter VOCs exhaust gas source 5 meets the quality requirement of 5 pairs of air of VOCs exhaust gas source.
Shown in Fig. 3, the VOCs waste gas processing method of the present embodiment 4 is as follows:
1, waste gas VOCs exhaust gas source 5 being produced is introduced in organic matter treating apparatus 2 by blower fan 3, after the absorption and sorption or burning disposal of organic matter treating apparatus 2, a large amount of VOCs contained in waste gas are removed, by the organic solvent absorbing or suction type is collected, can reclaim by organic solvent collecting device 7, described organic solvent collecting device 7 can be separated from solvent groove, solvent tank or solvent equipment for purifying;
2, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source 5 produces, VOCs content contained in this tail gas can be ignored, can be considered fresh air, after the adjusting of air quality adjusting device 9, under the effect of blower fan 3, return to VOCs exhaust gas source 5 and reuse.
Embodiment 5
While containing coating cloud, dust, mist of oil or aerosol in the waste gas that VOCs exhaust gas source 5 produces, while being paint spray booth such as VOCs exhaust gas source 5:
Please refer to shown in Fig. 4, on the basis of embodiment 1, the VOCs exhaust treatment system of the present embodiment 5, also comprises coating cloud treating apparatus 1, and described coating cloud treating apparatus 1 is arranged between the outlet side of described VOCs exhaust gas source 5 and the inlet end of organic matter treating apparatus 2.
Please refer to shown in Fig. 4, the VOCs waste gas processing method of the present embodiment 5 is as follows:
1, waste gas VOCs exhaust gas source 5 being produced introduces by blower fan 3 Transformatin that carries out coating cloud, dust, mist of oil, aerosol in coating cloud treating apparatus 1, and the waste residue obtaining after processing can reclaim by waste residue gathering-device 6;
2, the waste gas after processing enters in organic matter treating apparatus 2 under the effect of blower fan 3, after the absorption and sorption or burning disposal of organic matter treating apparatus 2, VOCs contained in waste gas is removed in a large number, by the organic solvent absorbing or suction type is collected, can reclaim by organic solvent collecting device 7, described organic solvent collecting device 7 can be separated from solvent groove, solvent tank or solvent equipment for purifying;
3, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source produces, VOCs content contained in this tail gas can be ignored, can be considered fresh air, under the effect of blower fan 3, return to VOCs exhaust gas source 5 and replace the high-concentration waste gas in exhaust gas source, the outer row of high-concentration waste gas after replacement goes VOCs to process, and its exhaust gas concentration that keeps exhaust gas source region is not further raise.
Described coating cloud treating apparatus 1 can arrange separately, also may be incorporated in organic matter treating apparatus 2, as long as allow waste gas first process through organic matter after the processing of coating cloud, dust, mist of oil or aerosol again.
Embodiment 6
The EGT producing when VOCs exhaust gas source 5 is higher, while being drying room, baking oven as VOCs exhaust gas source 5:
Please refer to shown in Fig. 5, on the basis of embodiment 1, the VOCs exhaust treatment system of the present embodiment 6, also comprises filter 11 and cooling device 12, and described filter 11 and cooling device 12 are arranged between the outlet side of described VOCs exhaust gas source 5 and the inlet end of organic matter treating apparatus 2.
Shown in Fig. 5, the VOCs waste gas processing method of the present embodiment 6 is as follows:
1, waste gas VOCs exhaust gas source 5 being produced is introduced in filter 11 and is filtered by blower fan 3, then enters cooling device 12 and carries out cooling (for low temperature waste gas, needn't pass through this road refrigerating work procedure);
2, through cooled waste gas, by blower fan 3, introduce in organic matter treating apparatus 2 again, after the absorption or absorption of organic matter treating apparatus 2, VOCs contained in waste gas is removed in a large number, by the organic solvent absorbing or suction type is collected, can reclaim by organic solvent collecting device 7, described organic solvent collecting device 7 can be separated from solvent groove, solvent tank or solvent equipment for purifying;
3, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source produces, VOCs content contained in this tail gas can be ignored, and can be considered fresh air, returns to VOCs exhaust gas source 5 and reuse under the effect of blower fan 3.
Above-described embodiment 2 or 3 and embodiment 4~6 can be combined, to adapt to the VOCs exhaust-gas treatment under different situations.Such as working as organic matter treating apparatus 2, be adsorption tanks, and when the quality of 5 pairs of air of VOCs exhaust gas source has specific (special) requirements, described VOCs exhaust treatment system is on the basis of embodiment 1, comprise the second blower fan 10 and air quality adjusting device 9, described VOCs waste gas processing method comprises the cooling and dehumidifying step of adsorption tanks and air quality regulating step simultaneously simultaneously.In order to be illustrated more clearly in this combined situation, below for embodiment 7 and embodiment 8, be elaborated again, other more combined situation can be with reference in like manner.
Embodiment 7
When organic matter treating apparatus 2 is for including the absorbing recovery device of adsorption tanks, and the quality of 5 pairs of air of VOCs exhaust gas source is while having specific (special) requirements:
Please refer to shown in Fig. 6, on the basis of embodiment 1, the VOCs exhaust treatment system of the present embodiment 7, also comprises the second blower fan 10 and air quality adjusting device 9.
Described the second blower fan 10 is connected with the adsorption tanks of organic matter treating apparatus 2, offers cooling and dehumidifying passage on adsorption tanks, and one end of described cooling and dehumidifying passage is connected with the second blower fan 10, and the other end of described cooling and dehumidifying passage is connected with the external world.
Described air quality adjusting device 9 is arranged between the outlet side and VOCs exhaust gas source 5 of organic matter treating apparatus 2, described air quality adjusting device 9 can be selected according to the specific requirement of 5 pairs of air qualities of VOCs exhaust gas source, such as the temperature and humidity of 5 pairs of air of VOCs exhaust gas source has requirement, air quality adjusting device 9 can comprise air temperature modification unit and/or air humidity regulon, through the adjusting of air quality adjusting device 9, the gas that makes to enter VOCs exhaust gas source 5 meets the quality requirement of 5 pairs of air of VOCs exhaust gas source.
Shown in Fig. 6, the VOCs waste gas processing method of the present embodiment 7 is as follows:
1, waste gas VOCs exhaust gas source 5 being produced is introduced in organic matter treating apparatus 2 by blower fan 3, after the adsorption treatment of organic matter treating apparatus 2, a large amount of VOCs contained in waste gas are removed, the organic solvent of collecting by suction type can reclaim by organic solvent collecting device 7, and described organic solvent collecting device 7 can be separated from solvent groove, solvent tank or solvent equipment for purifying;
In organic matter processing procedure, because adsorption tanks temperature in tank after desorption completes is higher, need cooling in time, and have water vapour, water vapour enters VOCs exhaust gas source 5 will affect its working environment, and it is unfavorable to cause, therefore need in the cooling and dehumidifying passage of adsorption tanks, pass into fresh air by the second blower fan 10, adsorption tanks are carried out cooling and take away the water vapour in adsorption tanks, and the gas after cooling and dehumidifying, directly discharged in the air, is not back in VOCs exhaust gas source 5.
2, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source 5 produces, VOCs content contained in this tail gas can be ignored, can be considered fresh air, after the adjusting of air quality adjusting device 9, under the effect of blower fan 3, return to VOCs exhaust gas source 5 and reuse.
Embodiment 8
In the waste gas that VOCs exhaust gas source 5 produces, contain coating cloud, organic matter treating apparatus 2 is for including the absorbing recovery device of adsorption tanks, and the quality of 5 pairs of air of VOCs exhaust gas source is while having specific (special) requirements:
Please refer to shown in Fig. 7, on the basis of embodiment 1, the VOCs exhaust treatment system of the present embodiment 5, also comprises coating cloud treating apparatus 1, the second blower fan 10 and air quality adjusting device 9.
Described coating cloud treating apparatus 1 is arranged between the outlet side of described VOCs exhaust gas source 5 and the inlet end of organic matter treating apparatus 2.
Described the second blower fan 10 is connected with the adsorption tanks of organic matter treating apparatus 2, offers cooling and dehumidifying passage on adsorption tanks, and one end of described cooling and dehumidifying passage is connected with the second blower fan 10, and the other end of described cooling and dehumidifying passage is connected with the external world.
Described air quality adjusting device 9 is arranged between the outlet side and VOCs exhaust gas source 5 of organic matter treating apparatus 2, described air quality adjusting device 9 can be selected according to the specific requirement of 5 pairs of air qualities of VOCs exhaust gas source, such as the temperature and humidity of 5 pairs of air of VOCs exhaust gas source has requirement, air quality adjusting device 9 can comprise air temperature modification unit and/or air humidity regulon, through the adjusting of air quality adjusting device 9, the gas that makes to enter VOCs exhaust gas source 5 meets the quality requirement of 5 pairs of air of VOCs exhaust gas source.
Shown in Fig. 7, the VOCs waste gas processing method of the present embodiment 8 is as follows:
1, waste gas VOCs exhaust gas source 5 being produced is introduced in coating cloud treating apparatus 1 and is carried out coating cloud processing by blower fan 3, and the waste residue that coating cloud obtains after processing can reclaim by waste residue gathering-device 6;
2, the waste gas after coating cloud processing enters in organic matter treating apparatus 2 under the effect of blower fan 3, after the adsorption treatment of organic matter treating apparatus 2, a large amount of VOCs contained in waste gas are removed, the organic solvent of collecting by suction type can reclaim by organic solvent collecting device 7, and described organic solvent collecting device 7 can be separated from solvent groove, solvent tank or solvent equipment for purifying;
In organic matter processing procedure, because adsorption tanks temperature in tank after desorption completes is higher, need cooling in time, and have water vapour, water vapour enters VOCs exhaust gas source 5 will affect its working environment, and it is unfavorable to cause, therefore need in the cooling and dehumidifying passage of adsorption tanks, pass into fresh air by the second blower fan 10, adsorption tanks are carried out cooling and take away the water vapour in adsorption tanks, and the gas after cooling and dehumidifying, directly discharged in the air, is not back in VOCs exhaust gas source 5.
3, the tail gas after organic matter is processed only contains micro-VOCs, compare with the waste gas that VOCs exhaust gas source produces, VOCs content contained in this tail gas can be ignored, can be considered fresh air, after the adjusting of air quality adjusting device 9, under the effect of blower fan 3, return to VOCs exhaust gas source 5 and reuse.
In sum, VOCs exhaust treatment system provided by the invention and processing method, not only realized the zero-emission of VOCs waste gas, thoroughly eliminated the exhaust emission of VOCs waste gas to environment, meet the requirement of modern enterprise to energy-saving and emission-reduction, raising productivity effect, and applicable to the VOCs exhaust-gas treatment under different situations, can obtain better exhaust-gas treatment effect, the operation stability and the job requirement that meets different VOCs exhaust gas source that improve whole system, possess market application foreground widely.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (10)

1. a VOCs waste gas processing method, is characterized in that, comprising:
Organic matter treatment step: the waste gas that VOCs exhaust gas source is produced carries out organic matter processing, described organic matter is treated to and adopts one or more the combined method absorbing in absorption method, absorption absorption method, condensation absorption method, burning method, catalytic burning method, plasma method and bioanalysis to remove the VOCs in waste gas;
Tail gas recycle step: the waste gas after organic matter is processed returns to VOCs exhaust gas source.
2. VOCs waste gas processing method according to claim 1, is characterized in that: in described tail gas recycle step, the waste gas after organic matter is processed returns to VOCs exhaust gas source after air-distribution device distributes each position wind speed and airflow direction.
3. VOCs waste gas processing method according to claim 1, it is characterized in that: between described organic matter treatment step and tail gas recycle step, also comprise compensated with air step, described compensated with air step for to pass into or a certain amount of air of pass-out in scheme for exhaust gas circulation system.
4. VOCs waste gas processing method according to claim 1, it is characterized in that: between described organic matter treatment step and tail gas recycle step, also comprise air quality regulating step, described air quality regulating step is for to regulate the temperature of gas and/or humidity.
5. VOCs waste gas processing method according to claim 1, is characterized in that: described organic matter treatment step carries out in adsorption tanks, in processing procedure by passing into air with cooling adsorption tanks in adsorption tanks and getting rid of the water vapour in adsorption tanks.
6. VOCs waste gas processing method according to claim 1, it is characterized in that: before described organic matter treatment step, also comprise coating cloud treatment step, described coating cloud treatment step is for carrying out the waste gas of VOCs exhaust gas source generation the Transformatin of coating cloud, dust, mist of oil or aerosol.
7. VOCs waste gas processing method according to claim 6, is characterized in that: the waste residue obtaining in described coating cloud treatment step reclaims or delivers to treating stations and processes.
8. VOCs waste gas processing method according to claim 1, is characterized in that: before described organic matter treatment step, also comprise filtration step, described filtration step is for carrying out filtration treatment by the waste gas of VOCs exhaust gas source generation.
9. VOCs waste gas processing method according to claim 1, is characterized in that: before described organic matter treatment step, also comprise cooling step, described cooling step is for to carry out cooling to waste gas.
10. VOCs waste gas processing method according to claim 1, is characterized in that: the organic solvent obtaining in described organic matter treatment step recycles.
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