CN106039993A - Method for purifying benzene-containing waste gas through synergy of TiO2 ferrite dielectric barrier discharging and spraying - Google Patents
Method for purifying benzene-containing waste gas through synergy of TiO2 ferrite dielectric barrier discharging and spraying Download PDFInfo
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- CN106039993A CN106039993A CN201610545001.3A CN201610545001A CN106039993A CN 106039993 A CN106039993 A CN 106039993A CN 201610545001 A CN201610545001 A CN 201610545001A CN 106039993 A CN106039993 A CN 106039993A
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- photocatalyst
- tio
- ferrite
- waste gas
- temperature plasma
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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
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a method for purifying benzene-containing waste gas through synergy of TiO2 ferrite dielectric barrier discharging and spraying, relates to the technical field of environmental protection, and relates to a volatile organic compound (VOCs) treating method. The preparation method comprises the steps that a TiO2 ferrite photocatalyst with the particle diameter of 1-3 mm is prepared, and then added into water to prepare photocatalyst absorbing liquid with the mass concentration of 10-15%; the photocatalyst absorbing liquid is added into a line-barrel low-temperature plasma reactor, the photocatalyst absorbing liquid is sprayed on the top of the low-temperature plasma reactor through a slurry circulating pump, and catalytic absorption treatment of benzene-containing organic waste gas is completed in the line-barrel low-temperature plasma reactor. The problems that emission cannot reach standards and energy consumption is high after a low-temperature plasma technology is adopted for treatment of organic waste gas containing benzene, methylbenzene, xylene and the like are solved.
Description
Technical field
The present invention relates to environmental technology field, relate to volatile organic matter (VOCs) administering method.
Background technology
In volatile organic waste gas, the process containing benzene (benzene,toluene,xylene) waste gas is the difficult point processed in organic exhaust gas,
There are the technology such as absorption method, Production by Catalytic Combustion Process, low temperature plasma method at present.
Lower temperature plasma technology is compared with general volatile organic waste gas administering method, and handling process is short, technique stream
Journey is simple, start-stop is convenient, applied widely, and the removal to low concentration gas has unique effect.There is some superiority.In recent years
Coming, lower temperature plasma technology is used widely.Researcher devises a series of plasma reactor, from structure of reactor
On can be divided into that line is board-like, spool formula, point be to board-like, filling bed type and combined type etc.；One-part form can be divided into from structure anti-
Answer device and two section reactor.The application of one-part form reactor contributes to the combination of high energy active particle and catalyst, but due to
Active particle, in the generation of the phenomenon such as the uncertainty of quantitative aspect and particle surface secondary discharge, causes low temperature plasma
There are some interference in the research with catalyst coupled modes, there is uncertainty.Two section reactor be catalyst area with
Plasma area has certain distance, makes more short-life ion cannot arrive catalysis region, it is impossible to play collaborative
Effect.
But lower temperature plasma technology is relatively low to the volatile organic waste gas treatment effeciency containing benzene, and capacity usage ratio is low, energy
Consumption height, target product selectivity is low, can produce multiple intermediate product, produces secondary pollution.
To this end, for the problem existed containing benzene VOCs treatment containing benzene,toluene,xylene etc., need to improve low temperature etc.
The discharge mode of gas ions and utilization collaborative with other technologies, improve the treatment effect containing benzene organic exhaust gas.
Summary of the invention
The present invention provides TiO2Ferrite dielectric barrier discharge works in coordination with the method for spray cleaning waste gas containing benzene, and the present invention solves
For containing benzene,toluene,xylene etc. containing in benzene VOCs treatment, use lower temperature plasma technology to process heel row unconventional and unrestrained not
To standard, the problems such as power consumption is high.
For solving the problems referred to above, the present invention adopts the following technical scheme that TiO2The collaborative spray of ferrite dielectric barrier discharge
The method purifying waste gas containing benzene, is first to prepare the TiO that particle diameter is 1～3mm2Ferrite photocatalyst, then by TiO2Ferrum oxygen
Body photocatalyst is added to the water and is made into the photocatalyst absorbing liquid that mass concentration is 10～15%, and the 3rd by photocatalyst absorbing liquid
Add in line-cylinder reaction of low temperature plasma device, and make photocatalyst absorbing liquid from low temperature plasma by slurry circulating pump
Reactor head sprays, and completes the organic exhaust gas containing benzene and complete catalytic absorption process in online-cylinder reaction of low temperature plasma device.
Further, the TiO of the present invention2Ferrite dielectric barrier discharge works in coordination with the method for spray cleaning waste gas containing benzene, also
Have a characteristic that containing benzene organic exhaust gas online-cylinder reaction of low temperature plasma device in complete the technique bar that catalytic absorption processes
Part is: plasma potential is 30～65kV, and electric current is 0.4～0.9A, photocatalyst absorbing liquid flow with containing benzene organic exhaust gas
The ratio of flow is 10:1～15:1 L/m3, containing benzene organic exhaust gas online-cylinder reaction of low temperature plasma device in the time of staying be
5-10s。
Further, the TiO of the present invention2Ferrite dielectric barrier discharge works in coordination with the method for spray cleaning waste gas containing benzene, also
Have a characteristic that the TiO of 1～3mm2The preparation of ferrite photocatalyst is: use electrophoretic deposition or sol-gel process load
Mass fraction is the TiO of 50～70%2On the ferroferric oxide powder of 0～2mm, then dry screening and obtain the TiO of 1～3mm2
Ferrite photocatalyst.
Being fixed on by catalyst at present in the middle of region of discharge and constitute filled type medium discharge mode, this mode exists and is easily generated
Spark discharge, under peak voltage, reactor is easily generated spark discharge, destroys being normally carried out of electric discharge, and purification efficiency is low, also
Dangerous property.And when packing material thickness is more than during for 3mm, when electric field intensity is 4KV/cm, owing to puncturing and spark
Produce, the problem such as the most completely of the decomposition containing benzene organic exhaust gas is proposed the present invention.
The application present invention processes waste gas containing benzene, and waste gas containing benzene meets discharge standard, and simple to operate, substantially increases energy
Amount utilization rate, reduces energy consumption 10-20%.
Accompanying drawing explanation
Fig. 1 is the structural representation of device therefor of the present invention line-cylinder reaction of low temperature plasma device.
Symbol description in figure: containing benzene organic exhaust gas entrance 1, reaction of low temperature plasma device 2, electrode (positive pole) 3, power supply 4,
Aluminum net (negative pole) 5, circuit arrangement 6, earth lead 7, slurry circulating pump 8, absorbing liquid effusion meter 9, pipeline 10, shower nozzle 11, valve 12,
13 are exported, absorbing liquid circulatory pool 14 containing benzene organic exhaust gas.
Detailed description of the invention
Below in conjunction with Fig. 1 and by optimal embodiment, the present invention is described in detail.
Embodiment 1
Process certain Furniture Factory lacquer spraying waste gas 10000m3/ h, benzene concentration 6mg/m3, toluene 7 mg/m3, dimethylbenzene 3 mg/m3, enter
TiO2Ferrite dielectric barrier discharge is worked in coordination with in spray cleaning plasma reactor, and voltage is 55kV, and electric current is 0.7A, 2mm's
TiO2Ferrite photocatalyst mass concentration is 10%, and photocatalyst absorbing liquid flow with the ratio containing benzene organic exhaust gas flow is
13:1 L/m3, containing benzene organic exhaust gas online-cylinder reaction of low temperature plasma device in the time of staying be 10s, benzene clearance after process
Being 97.5%, toluene removal rate is 98%, and dimethylbenzene clearance is 96.5%
Embodiment 2
Process certain 4S shop motor vehicle repair spraying waste gas 5000m3/ h, benzene concentration 10mg/m3, toluene 5 mg/m3, dimethylbenzene 5.4 mg/
m3, enter TiO2Ferrite dielectric barrier discharge is worked in coordination with in spray cleaning plasma reactor, and voltage is 45kV, and electric current is 0.5A,
The TiO of 2mm2Ferrite photocatalyst mass concentration is 15%, photocatalyst absorbing liquid flow and the ratio containing benzene organic exhaust gas flow
Value is 12:1 L/m3, containing benzene organic exhaust gas online-cylinder reaction of low temperature plasma device in the time of staying be 7s, after process, benzene goes
Except rate is 92.5%, toluene removal rate is 93%, and dimethylbenzene clearance is 92.5%
Last it is noted that obvious, above-described embodiment is only for clearly demonstrating example of the present invention, and the most right
The restriction of embodiment.For those of ordinary skill in the field, can also be made it on the basis of the above description
The change of its multi-form or variation.Here without also cannot all of embodiment be given exhaustive.And thus amplified out
Obvious change or variation still in protection scope of the present invention among.
Claims (3)
1.TiO2Ferrite dielectric barrier discharge works in coordination with the method for spray cleaning waste gas containing benzene, it is characterised in that first prepare
Particle diameter 1～3mm TiO2Ferrite photocatalyst, then by TiO2Ferrite photocatalyst is added to the water and is made into mass concentration
Being the photocatalyst absorbing liquid of 10～15%, photocatalyst absorbing liquid is added in line-cylinder reaction of low temperature plasma device by the 3rd,
And by slurry circulating pump make photocatalyst absorbing liquid from reaction of low temperature plasma device top spray, online-cylinder low temperature etc. from
Daughter reactor completes the organic exhaust gas containing benzene and completes catalytic absorption process.
2. TiO as claimed in claim 12Ferrite dielectric barrier discharge works in coordination with the method for spray cleaning waste gas containing benzene, and its feature exists
In, containing benzene organic exhaust gas online-cylinder reaction of low temperature plasma device in complete the process conditions that catalytic absorption processes and be: plasma
Bulk voltage is 30～65kV, and electric current is 0.4～0.9A, and photocatalyst absorbing liquid flow with the ratio containing benzene organic exhaust gas flow is
10:1～15:1 L/m3, containing benzene organic exhaust gas online-cylinder reaction of low temperature plasma device in the time of staying be 5-10s.
3. TiO as claimed in claim 1 or 22Ferrite dielectric barrier discharge works in coordination with the method for spray cleaning waste gas containing benzene, and it is special
Levy and be, the TiO of 1～3mm2The preparation of ferrite photocatalyst is: use electrophoretic deposition or sol-gel process load quality to divide
Number is the TiO of 50～70%2On the ferroferric oxide powder of 0～2mm, then dry screening and obtain the TiO of 1～3mm2Ferrite
Photocatalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610545001.3A CN106039993A (en) | 2016-07-13 | 2016-07-13 | Method for purifying benzene-containing waste gas through synergy of TiO2 ferrite dielectric barrier discharging and spraying |
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| CN201610545001.3A CN106039993A (en) | 2016-07-13 | 2016-07-13 | Method for purifying benzene-containing waste gas through synergy of TiO2 ferrite dielectric barrier discharging and spraying |
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| CN106039993A true CN106039993A (en) | 2016-10-26 |
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| CN201610545001.3A Pending CN106039993A (en) | 2016-07-13 | 2016-07-13 | Method for purifying benzene-containing waste gas through synergy of TiO2 ferrite dielectric barrier discharging and spraying |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110314496A (en) * | 2019-08-06 | 2019-10-11 | 中国化学工业桂林工程有限公司 | A kind of absorbing liquid for rubber internal mixing exhaust-gas treatment, preparation method and the usage |
| CN113680184A (en) * | 2021-09-22 | 2021-11-23 | 华北电力大学（保定） | Low-carbon emission type VOCs purification device and method based on low-temperature plasma technology |
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| KR101044810B1 (en) * | 2011-01-10 | 2011-06-27 | 다림건설(주) | Volatile organic compounds treatment apparatus and odor treatment apparatus using the same |
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2016
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| US8105546B2 (en) * | 2005-05-14 | 2012-01-31 | Air Phaser Environmental Ltd. | Apparatus and method for destroying volatile organic compounds and/or halogenic volatile organic compounds that may be odorous and/or organic particulate contaminants in commercial and industrial air and/or gas emissions |
| CN101590282A (en) * | 2008-05-29 | 2009-12-02 | 北京道顺国际技术开发有限责任公司 | The plasma of horizontal runner spray cleaning and photocatalytic air-purification equipment |
| KR101044810B1 (en) * | 2011-01-10 | 2011-06-27 | 다림건설(주) | Volatile organic compounds treatment apparatus and odor treatment apparatus using the same |
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| 喻黎明等: "低温合成TiO2/Fe3O4磁载光催化剂的光催化性能研究", 《北京化工大学学报(自然科学版)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110314496A (en) * | 2019-08-06 | 2019-10-11 | 中国化学工业桂林工程有限公司 | A kind of absorbing liquid for rubber internal mixing exhaust-gas treatment, preparation method and the usage |
| CN110314496B (en) * | 2019-08-06 | 2022-01-25 | 中国化学工业桂林工程有限公司 | Absorption liquid for rubber banburying waste gas treatment, preparation method and application thereof |
| CN113680184A (en) * | 2021-09-22 | 2021-11-23 | 华北电力大学（保定） | Low-carbon emission type VOCs purification device and method based on low-temperature plasma technology |
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Application publication date: 20161026 |