CN110917842A - Multiple-effect-in-one organic waste gas purification method and system - Google Patents

Multiple-effect-in-one organic waste gas purification method and system Download PDF

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Publication number
CN110917842A
CN110917842A CN201911081117.6A CN201911081117A CN110917842A CN 110917842 A CN110917842 A CN 110917842A CN 201911081117 A CN201911081117 A CN 201911081117A CN 110917842 A CN110917842 A CN 110917842A
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waste gas
reactor
stage
air
organic waste
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CN201911081117.6A
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林桂添
盛晟
陈奋飞
郦建锋
田哲毅
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PowerChina Huadong Engineering Corp Ltd
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PowerChina Huadong Engineering Corp Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84—Biological processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/104—Ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/95—Specific microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4591—Construction elements containing cleaning material, e.g. catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract

The invention provides a new multiple-effect-in-one organic waste gas purification method and system, which sequentially comprise three treatment stages; in the first stage, an ultraviolet lamp is adopted to decompose the waste gas under the catalytic action of a photocatalyst in combination with the action of ozone; in the second stage, the components in the waste gas are decomposed in humid air by adopting nanospheres processed by mineral materials; in the third stage, the waste gas is treated by biological trickling filtration; and the first stage is carried out in a separate reactor independently of the second and third stages. Through the combination of three processes, the organic gas waste gas generated in the printing and dyeing and paint spraying industries reaches the emission standard of gas pollutants after being treated. The invention can avoid operation risk, greatly reduce operation cost, can be efficiently applied to the treatment of organic gas generated in the printing and dyeing and painting industries, has good treatment effect on waste gas in the printing and dyeing and painting industries, and particularly has obvious purification effect on triphen waste gas which is difficult to treat and heavily polluted in the conventional organic waste gas.

Description

Multiple-effect-in-one organic waste gas purification method and system
Technical Field
The invention relates to an organic waste gas purification method and system in the technical field of industrial waste gas treatment, in particular to treatment of organic gas generated in printing and dyeing and painting industries.
Background
The organic gas generated in the printing and dyeing and painting industries mainly comprises benzene, toluene and xylene (triphenyl), and in addition, formaldehyde, sulfide, butanone, nitrogen oxides and the like, and oily substances and micro particles contained in the waste gas have stable properties, are mostly insoluble in water, float in the air for a long time and seriously pollute the atmospheric environment; how to effectively control and treat the volatile organic compounds is an urgent problem to be solved in the current printing and dyeing places.
At present, the method of activated carbon adsorption and catalytic combustion regeneration is adopted for the organic waste gas produced in the industry, two adsorbers are generally required to be alternately switched to operate, the process is complex, and the investment and the operating cost are high. The catalytic combustion regeneration adopts noble metals (platinum and rhodium) as catalysts, the combustion temperature is above 250 ℃, so the regeneration heating is required to be above 300 ℃, the ignition point of the activated carbon is 600 ℃, and heat is released when the activated carbon is adsorbed, so the adsorption and the regeneration have ignition risks.
Disclosure of Invention
In order to overcome the defects of the prior art, the first object of the present invention is to provide a new method for purifying organic waste gas, which integrates multiple functions into one, can achieve better waste gas purification effect, reduce the operation and investment cost of waste gas treatment, better complete the decomposition of organic waste gas, and avoid the risk of combustion in the desorption process of activated carbon. The technical scheme adopted by the invention is as follows:
a multiple-effect integrated organic waste gas purification method is characterized in that the method sequentially comprises three treatment stages; in the first stage, an ultraviolet lamp is adopted to decompose the waste gas under the catalytic action of a photocatalyst in combination with the action of ozone; in the second stage, the components in the waste gas are decomposed in humid air by adopting nanospheres processed by mineral materials; in the third stage, the waste gas is treated by biological trickling filtration; and the first stage is carried out in a separate reactor independently of the second and third stages. Through the combination of three processes, the organic gas waste gas generated in the printing and dyeing and paint spraying industries reaches the emission standard of gas pollutants after being treated.
Furthermore, the second stage and the third stage are carried out in the same reactor, the treatment device of the second stage is arranged at the front part of the reactor, the treatment device of the third stage is arranged at the rear part of the reactor, gas is introduced from the lower part of the reactor, and the treated gas is discharged from the upper part of the reactor, so that the equipment can be simplified, the cost and the energy consumption can be reduced, and meanwhile, the treatment effects of the second stage and the third stage can be improved.
Another object of the present invention is to provide a multiple-effect organic waste gas purification system, which can apply the above method, and at the same time, has simple equipment, reduces cost and energy consumption, and can improve treatment effect. The technical scheme adopted by the invention is as follows:
a multiple-effect-in-one organic waste gas purification system is characterized by comprising a first reactor and a second reactor, wherein a connecting pipeline and a fan are arranged between the first reactor and the second reactor; an ozone and ultraviolet photocatalyst air treatment device is arranged in the first reactor; the front part of the second reactor is provided with a nanosphere air purification device, the nanosphere air purification device is provided with a spraying device, the rear part of the second reactor is provided with a biological trickling filter device, the biological trickling filter device is used for feeding air from the lower part, and the treated air is discharged from the upper part.
Further, the nanosphere air purification device comprises a device box body, an air inlet is formed in the top of the box body, and an outlet in the lower portion of the box body is directly communicated with a space of the second reactor in the lower portion of the biological trickling filter device.
Furthermore, a plurality of photocatalyst filter screens are arranged on a path through which air passes in the first reactor, and a common ultraviolet lamp and an ozone ultraviolet lamp are arranged.
Furthermore, in the biological trickling filter device, a biological filler is arranged at the lower part of the biological trickling filter device, and a nutrient solution spraying device is arranged at the upper part of the biological trickling filter device.
Further, the biological filler adopts bark.
For the photocatalyst filter screen, active carbon fiber is used as a carrier to manufacture a frame filter screen, nano titanium dioxide is attached to the frame filter screen to serve as a catalyst and serve as an adsorption filter material of organic waste gas, oxygen in the air generates electron-hole pairs under the irradiation of ultraviolet rays by the titanium dioxide, so that atomic oxygen is generated, the atomic oxygen is combined with oxygen and water in the air to generate ozone and hydroxyl anions, the ozone and the hydroxyl anions have strong oxidizability, and the adsorption and decomposition of organic gas can be completed to generate carbon dioxide and water.
The nanospheres are prepared by mixing and roasting natural electrode materials (mainly tourmaline) and various functional additive materials of precious metals such as Au, Ag and the like after nano-scale processing, and are nano air purification materials (NAP for short) with the diameter of less than 10 nanometers, for example, the diameter is only 3 mm. The natural electric field characteristic of the material can utilize the temperature and pressure change to oxidize and decompose water to automatically release hydroxyl anions, and the hydroxyl anions have strong oxidation potential (2.04V) and can efficiently and quickly oxidize and decompose organic matters, thereby achieving the purpose of purifying organic waste gas. This nanosphere is tiled on the basket, makes waste gas transversely overflow and passes through to fully make the contact of nanosphere and waste gas, make the purification reaction more abundant.
The biological trickling filter device is internally provided with an inert filler (bark is adopted in the invention) with a certain height, a layer of biological membrane grows on the surface of the inert filler, and circulating trickling filter liquid is sprayed from the top of the tower to provide necessary humidity and nutrient substances such as nitrogen, phosphorus, trace elements and the like for the growth of microorganisms in the biological membrane. The polluted gas enters the packed bed from the bottom of the tower (opposite to the liquid phase flow direction), in the process of passing through the packed bed, the organic pollutants enter the biological membrane through mass transfer action of various ways and are degraded by obligate degradation bacteria in the biological membrane, the final products are CO2 and H2O, and the purified waste gas is discharged from the system.
The invention provides a waste gas treatment system which is convenient to operate and super-convenient to operate, solves the technical problem of adsorption-desorption of the existing activated carbon, avoids operation risks, greatly reduces operation cost, can be efficiently applied to treatment of organic gas generated in the printing and dyeing and paint spraying industries, has good treatment effect on waste gas in the printing and dyeing and paint spraying industries, and particularly has obvious purification effect on triphen waste gas which is difficult to treat and heavily polluted in the existing conventional organic waste gas.
Drawings
FIG. 1 is a schematic of the present invention.
Detailed Description
Reference is made to the accompanying drawings. The organic waste gas purification system provided by the invention comprises an ozone and ultraviolet photocatalyst reaction stage, a nanosphere air purification stage and a biological trickling filtration stage, and is completed by two box body devices. The system is used for treating waste gas 20000m in paint spraying industry3For example, the waste gas is mainly from a large amount of paint mist generated in an automatic spraying line and a paint spraying process, mainly contains a large amount of waste gases such as benzene, dimethylbenzene, styrene, sulfide, butanone and the like, and is a waste gas with serious pollution. In fig. 1, ozone + ultraviolet photocatalyst reactor 2 is connected with front end inlet duct through flange 1, is provided with 2 lacquer fog filter screens 3 at the inlet end, detaches most lacquer fog in the waste gas, avoids lacquer fog to let in follow-up reaction unit, causes the filter screen to block up or makes ultraviolet lamp luminance reduce. The paint mist filter screen needs to be replaced regularly according to the paint mist concentration in the waste gas. The waste gas passes through 16 photocatalyst filter screens 6 after a large amount of paint mist is removed by the paint mist filter screen, 3 ozone-producing ultraviolet lamps 5 and 32 common ultraviolet lamps 4 are arranged in an interlayer of the photocatalyst filter screens, and most organic pollutants in the waste gas are reacted into CO2 and H2 under the action of ozone and ultraviolet rays under the photocatalytic reaction2O, and the like. After the waste gas is purified by an ozone and ultraviolet photocatalyst reactorLet in second reactor front end under centrifugal draught fan 7 effect, spray + nanosphere air purification device 8 at the front end of reactor, nanosphere air purification device includes the device box, and the top of box sets up the air inlet and links to each other with the outlet duct of centrifugal draught fan 7, and centrifugal draught fan 7 introduces nanosphere air purification device with the gas after photocatalyst catalytic purification, and gas produces partial soluble gas (CO) through with overflowing gaseous horizontal arrangement's 2 nanosphere purifying material 9 abundant contacts and react the back (CO)2、NO2) And the spray nozzle 11 of the box body above the box body generates mist gas to CO2、NO2After the gas is dissolved and absorbed, the incompletely purified waste gas is directly introduced into the space of the second reactor at the lower part of the biological trickling filter device from the lower part outlet. The back part of the second reactor is provided with a biological trickling filter device 12, 3 layers of barks 13 are arranged in the device to be used as biological filler, air is directly fed from the lower part of the back part of the second reactor, the air is contacted with the barks in a mode of feeding in and discharging out from the lower part, nutrient solution arranged on the upper part sprays the barks to supplement nutrients required by microorganisms to the barks, biomembranes are hung on the barks, and waste gas introduced into the barks is deeply treated to reach the emission standard after the waste gas is treated, and finally the waste gas is discharged through a high-altitude discharge pipe 14.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.

Claims (7)

1. A multiple-effect integrated organic waste gas purification method is characterized in that the method sequentially comprises three treatment stages; in the first stage, an ultraviolet lamp is adopted to decompose the waste gas under the catalytic action of a photocatalyst in combination with the action of ozone; in the second stage, the components in the waste gas are decomposed in humid air by adopting nanospheres processed by mineral materials; in the third stage, the waste gas is treated by biological trickling filtration; and the first stage is carried out in a separate reactor independently of the second and third stages.
2. The method of claim 1, wherein the second and third stages are performed in the same reactor, the second stage treatment device is disposed at the front part of the reactor, the third stage treatment device is disposed at the rear part of the reactor, and the third stage gas is introduced from the lower part and the treated gas is discharged from the upper part.
3. A multiple-effect-in-one organic waste gas purification system is characterized by comprising a first reactor and a second reactor, wherein a connecting pipeline and a fan are arranged between the first reactor and the second reactor; an ozone and ultraviolet photocatalyst air treatment device is arranged in the first reactor; the front part of the second reactor is provided with a nanosphere air purification device, the nanosphere air purification device is provided with a spraying device, the rear part of the second reactor is provided with a biological trickling filter device, the biological trickling filter device is used for feeding air from the lower part, and the treated air is discharged from the upper part.
4. The all-in-one organic waste gas purification system as claimed in claim 3, wherein the nanosphere air purification device comprises a device box body, an air inlet is arranged at the top of the box body, and an outlet at the lower part of the box body directly leads into a space of the second reactor at the lower part of the biological trickling filter device.
5. The all-in-one organic waste gas purification system as claimed in claim 3, wherein the first reactor is provided with a plurality of photocatalyst screens in the path through which air passes, and is provided with a common ultraviolet lamp and an ozone ultraviolet lamp.
6. The all-in-one organic waste gas purification system as claimed in claim 3, wherein the bio-trickling filter is provided with a bio-filler at a lower part thereof and a nutrient solution spraying device at an upper part thereof.
7. The all-in-one organic waste gas purifying system as claimed in claim 7, wherein the bio-seasoning is bark.
CN201911081117.6A 2019-11-07 2019-11-07 Multiple-effect-in-one organic waste gas purification method and system Pending CN110917842A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111889291A (en) * 2020-07-29 2020-11-06 中国一冶集团有限公司 Paint room with paint spraying waste gas treatment system
CN113230795A (en) * 2021-04-16 2021-08-10 中铁第一勘察设计院集团有限公司 Comprehensive treatment method for dust, water mist and paint mist in locomotive maintenance operation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104984638A (en) * 2014-12-15 2015-10-21 厦门市宇洲环保科技有限公司 Multiple effect integrated waste gas purification system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104984638A (en) * 2014-12-15 2015-10-21 厦门市宇洲环保科技有限公司 Multiple effect integrated waste gas purification system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111889291A (en) * 2020-07-29 2020-11-06 中国一冶集团有限公司 Paint room with paint spraying waste gas treatment system
CN113230795A (en) * 2021-04-16 2021-08-10 中铁第一勘察设计院集团有限公司 Comprehensive treatment method for dust, water mist and paint mist in locomotive maintenance operation

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