CN207324469U - A kind of compartment low-temperature plasma generator - Google Patents
A kind of compartment low-temperature plasma generator Download PDFInfo
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- CN207324469U CN207324469U CN201721001057.9U CN201721001057U CN207324469U CN 207324469 U CN207324469 U CN 207324469U CN 201721001057 U CN201721001057 U CN 201721001057U CN 207324469 U CN207324469 U CN 207324469U
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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
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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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- 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
- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
It the utility model is related to a kind of compartment low-temperature plasma generator, including low-temperature plasma electrical source, discharge of plasma in low temperature unit and reaction of low temperature plasma device, two of which or more than two discharge of plasma in low temperature unit intercalation reaction devices, interval is laid in the medium flow direction, and medium is 0.1s 50s by the time of the non-discharge area between being spaced the discharge cell laid.The utility model reduces the compound probability of active particle in low-temperature plasma generator, improves the efficiency of the pollutant in active particle degrading waste water and exhaust gas, reduce the generation probability of secondary pollution by discharging waste water and exhaust gas interval.
Description
Technical field
A kind of low-temperature plasma generator for waste water and exhaust-gas treatment is the utility model is related to, specifically, is related to
A kind of compartment low-temperature plasma generator.
Background technology
Volatile organic matter (VOCs) is the important sources of atmosphere pollution.A large amount of VOCs are discharged into air, with NOx, SOx,
O3Deng the physical-chemical reaction that complexity occurs, cause the generation of haze, seriously endangered to human body health care belt.At present, VOCs is normal
The active carbon adsorption of processing method, absorption process, heat-accumulation combustion method, Production by Catalytic Combustion Process, catalytic oxidation, bioanalysis and the light of rule
Catalysis method etc., but many unfavorable factors such as generally existing purification is not thorough, operating cost height.And using plasma technology point
It is a kind of new method for purifying waste gases to solve all kinds of gaseous pollutant molecules, which has the dirt for opening and stopping, handling
Contaminate the advantages that thing scope is wide, anti-concentration and flowed fluctuation ability are strong, purification efficiency is high.
In order to be directed to low-temperature plasma in exhaust-gas treatment using these toxic and harmful gas of Low Temperature Plasma Treating, people
The mechanism of action of body and the method for generation low temperature plasma have carried out substantial amounts of basic research.Energy in low temperature plasma
Transmit substantially：Electronics obtains energy from electric field, and energy is converted into the interior energy and kinetic energy of molecule by colliding, obtains energy
Molecule be excited, at the same time, moieties are ionized, these particles activated mutually collide so as to cause it is a series of multiple
Miscellaneous physical-chemical reaction.Because a large amount of active particles for being rich in plasma for example ion, electronics, excitation state atom and molecule
And free radical etc., so as to provide condition by chemical reaction handling VOCs and odorant for plasma technique.But right
During VOCs and odorant are degraded, when active particle is not often reacted with VOCs and odorant by
The new active particle of newly generated high energy electron excitation is compound, so that the utilization rate of active particle is not high.
In addition O can be produced when the discharge medium of low temperature plasma is air or oxygen3, and the service life of ozone is than other
Active particle will be grown, if be not fully utilized, have part O3Molecule by newly generated active particle it is compound fall, do not only result in
The utilization rate of active particle is not high, and can generate secondary pollution, such as nitrogen oxides.
Therefore the compound probability of active particle in low-temperature plasma generator is reduced, also means that and improves active grain
The efficiency of son degraded VOCs and odorant, reduce secondary pollution generation probability.
Although in view of the above-mentioned problems, patent CN204429064U, CN204380489U, CN201830541U,
CN103418217B, CN204485611U, CN203002160U are referred to plural serial stage electric discharge, but the technical side of these patents
Case is to simply increase the sum of series total power input of plasma generator, is inputted with the utility model in equal-wattage
On the premise of interval lay plasma generator, effectively reduce the compound probability of active component, improve the place to waste water or exhaust gas
Reason effect has essential difference in mechanism and effect；In addition the time of every grade of electric discharge is longer in these patents, seeks to by prolonging
Long discharge time improves treatment effect, has the essence different from the discharge time shortened in this patent per level-one.
Utility model content
The utility model reduces active particle in low-temperature plasma generator by discharging waste water and exhaust gas interval
Compound probability, improve the efficiency of pollutant in active particle degrading waste water and exhaust gas, reduce the generation of secondary pollution
Probability.
The utility model provides a kind of compartment low-temperature plasma generator, including low-temperature plasma electrical source, low temperature etc.
Plasma discharge unit and reaction of low temperature plasma device, two of which or more than two discharge of plasma in low temperature units are inserted
Enter reaction of low temperature plasma device, interval is laid in the medium flow direction, by reaction of low temperature plasma device at intervals of electric discharge
Region and non-discharge area.
Preferably, the time that medium passes through non-discharge area is 0.1s-50s.
Preferably, the spacing distance that the discharge of plasma in low temperature unit is laid in the medium flow direction being capable of basis
Need to be adjusted.
Preferably, the low-temperature plasma electrical source is any one in high voltage power supply, DC power supply, the pulse power,
And the output power of power supply can be adjusted as needed.
Preferably, the electric discharge pattern of the discharge of plasma in low temperature unit be corona discharge, it is single dielectric barrier discharge, double
Any one in dielectric barrier discharge, glow discharge, radio frequency discharge.
Preferably, the low-temperature plasma generator is any one in grid type, spool formula or printed line formula.
Preferably, the low-temperature plasma generator region of discharge or non-discharge area filling catalytic ozonation agent,
Ozone-decomposing agent and activated carbon etc..
The beneficial effects of the utility model：
The utility model arranges multigroup discharge cell along on waste water and exhaust gas flow direction, by waste water or exhaust gas
Every electric discharge, the compound probability of active particle in low-temperature plasma generator can be reduced, improves active particle to pollutant
Degradation efficiency.
Below by the change to organic exhaust gas total hydrocarbon degradation effect, it is compound that analysis suppresses low temperature plasma active component
Effect：
(1) multigroup discharge cell is arranged along on waste water and exhaust gas flow direction, can effectively strengthen the disturbance of air-flow,
Promote the mixing of medium, so as to increase collision and the reaction probabilities of living radical and contaminant molecule, improve living radical
Utilization ratio.The as shown by data of lab scale, pilot scale and industrial experiment, opens single discharge cell, and disposes one behind not
The discharge cell of unlatching, by two-stage type dielectric barrier discharge equipment compared with not disposing discharge cell thereafter, organic exhaust gas
The degradation efficiency of total hydrocarbon improves 3%；
(2) energy injection of the generation of living radical dependent on discharge process, general feelings during dielectric barrier discharge
Under condition, with the rise of Implantation Energy, the yield of living radical rises therewith, but increase is gradually slack-off, and single electric discharge
There are the upper limit for the Implantation Energy of unit and the generation density of living radical.Therefore, under certain power consumption, using multigroup electric discharge
Unit, reasonably distributes energy injection, has important influence for the yield of living radical.Lab scale and pilot experiment research
Show, using single discharge cell, and a discharge cell do not opened is set behind, by putting for two-stage type dielectric impedance
Electric equipment is compared with only setting single discharge cell, the former total hydrocarbon degradation efficiency is apparently higher than the latter；
(3) experiment shows that, using two discharge cells, each discharge cell power is 180W, organic exhaust gas and low temperature
Plasma generator time of contact is respectively 0.1S, and the spacing of two low-temperature plasma generators is increased to 1.0m by 0.3m,
Total hydrocarbon degradation efficiency is 81%.In the case where total power consumption is certain, compared to single discharge cell, and increases electric discharge spacing, open
The total hydrocarbon degradation efficiency for opening two groups of discharge cells improves 19%.The reason is that O and O that discharge process produces3Isoreactivity free radical
Density is higher and lasts a long time (＞ 1s), through first discharge cell generation and flowing to up to second electric discharge with gas
It is difficult to completely consume during unit, still has substantial amounts of O and O on second discharge cell periphery3Isoreactivity free radical, their presence
It can suppress second discharge cell O and O3Generation, therefore, when two discharge cells arrangement is nearer, caused total O and O3
The sum of produced when amount is individually arranged less than two discharge cells, the adjustable design of spacing is used in the utility model, is effectively kept away
Exempt from this problem.
Brief description of the drawings
Fig. 1 is the schematic diagram of compartment low-temperature plasma generator described in the utility model.
Label declaration：
1- reaction of low temperature plasma devices；2- low-temperature plasma generators；3- low-temperature plasma electrical sources；
4- terminal boxes；5- forms；6- sewage draining exits；7- blow valve ports.
Embodiment
Embodiment 1
The setup parameter of compartment low-temperature plasma generator is as follows：By 2 single dielectric impedances, spool formula low-temperature plasmas
Body generator is spaced laying in the medium flow direction, total power input 360W, and the speed of media flow is 0.05m/s, medium
It is 0.9s with each plasma generator time of contact, medium is 0.1s in the residence time of non-discharge area.
The organic volatile exhaust gas that certain sewage from oil refinery processing unit produces is taken to be tested, before experiment, benzene contains in exhaust gas
Measure as 80mg/Nm3, after degrading by above-mentioned compartment low-temperature plasma generator, the content of benzene is 24mg/Nm3, benzene removal
Rate is up to 70%.
Comparative example 1
The setup parameter of General low temperature plasma generator is as follows：By 1 single dielectric impedance, spool formula low temperature plasma
Generator is continuously laid in the medium flow direction, total power input 360W, and the speed of media flow is 0.05m/s, medium with
Plasma generator time of contact is 1.8s, and medium is 0.1s in the non-discharge area residence time.
Organic exhaust gas same as Example 1 is taken to be tested, the removal rate of benzene is 49%.
Embodiment 2
The setup parameter of compartment low-temperature plasma generator is as follows：By 2 bi-medium to block, grid type low-temperature plasma
Body generator is spaced laying, total power input 360W in the medium flow direction, and medium is contacted with each plasma generator
Time is 0.1s, and medium is 50s in the non-discharge area residence time.
The organic exhaust gas Volatile Gas that certain sewage from oil refinery processing unit produces is taken to be tested, before experiment, total hydrocarbon in exhaust gas
Content is 760mg/Nm3, after degrading by above-mentioned compartment low-temperature plasma generator, total hydrocarbon content 152mg/Nm3, always
Hydrocarbon removal rate is up to 89%.
Comparative example 2
The setup parameter of General low temperature plasma generator is as follows：By 1 bi-medium to block, grating type low temperature plasma
Generator outer electrode is continuously laid in the medium flow direction, total power input 360W, and the speed of media flow is 0.1m/s,
Medium and plasma generator time of contact are 0.2s, and medium is 50s in the non-discharge area residence time.
Organic exhaust gas same as Example 2 is taken to be tested, total hydrocarbon removal rate is 67%.
Embodiment 3
The setup parameter of compartment low-temperature plasma generator is as follows：By 3 corona discharge arrays, spool formula low temperature etc. from
Daughter generator interval is laid, total power input 360W, and medium and each plasma generator time of contact are 0.1s, medium
It is 30s in the non-discharge area residence time.
The organic volatile gas exhaust gas that certain sewage from oil refinery processing unit produces is taken to be tested, before experiment, mercaptan in exhaust gas,
The odour concentration content of the foul gas such as thioether is 10000, after degrading by above-mentioned compartment low-temperature plasma generator, is disliked
The odour concentration content of odour is 1000, and removal rate is up to 90%.
Comparative example 3
The setup parameter of General low temperature plasma generator is as follows：By 1 corona discharge array lines cartridge type low-temperature plasma
Body generator outer electrode is laid in the medium flow direction, and total power input 360W, medium is contacted with plasma generator
Time is 0.3s, and medium is 30s in the non-discharge area residence time.
Organic exhaust gas same as Example 3 is taken to be tested, the odour concentration removal rate of the foul gas such as mercaptan, thioether
For 56%.
Embodiment 4
The setup parameter of compartment low-temperature plasma generator is as follows：By 4 corona discharge arrays, spool formula low temperature etc. from
Daughter generator is spaced laying, pulse power total power input 360W in the medium flow direction, and the speed of media flow is
0.1m/s, medium and each plasma generator time of contact are 5s, and medium is 25s in the non-discharge area residence time.
The water outlet of certain sewage from oil refinery processing unit is taken to be tested, before experiment, the content of COD is 90mg/L in waste water,
After degrading by above-mentioned compartment low-temperature plasma generator, the content of COD is 49.5mg/L, and removal rate is up to 55%.
Comparative example 4
The setup parameter of General low temperature plasma generator is as follows：By 1 corona discharge array, spool formula low-temperature plasma
Body generator is laid in the medium flow direction, total power input 360W, and the speed of media flow is 0.1m/s, medium with it is each
Plasma generator time of contact is 20s, is 25s in the non-discharge area residence time.
Waste water same as Example 4 is taken to be tested, COD removal rates are 40%.
Embodiment 5
The setup parameter of compartment low-temperature plasma generator is as follows：By 5 glow discharge low-temp plasma generators
Interval is laid in the medium flow direction, total power input 360W, and the speed of media flow be 10m/s, medium with it is each etc. from
Daughter generator time of contact is 0.01s, and medium is 5s in the non-discharge area residence time.
The organic volatile gas that certain sewage from oil refinery processing unit produces is taken to be tested, before experiment, the content of benzene in exhaust gas
For 120mg/Nm3, after degrading by above-mentioned compartment low-temperature plasma generator, the content of benzene is 80mg/Nm3, benzene removal rate
Up to 33%.
Comparative example 5
The setup parameter of General low temperature plasma generator is as follows：1 glow discharge low-temp plasma generator is existed
Media flow is continuously laid on direction, total power input 360W, and the speed of media flow is 10m/s, and medium is sent out with plasma
Raw device time of contact is 0.05s, and medium is 5s in the non-discharge area residence time.
Organic volatile gas same as Example 5 is taken to be tested, benzene removal rate is 21%.
Embodiment 6
The setup parameter of compartment low-temperature plasma generator is as follows：2 dielectric barrier discharge low-temperature plasmas are sent out
Raw device is spaced 0.6m layings in the medium flow direction, total power input 360W, and the speed of media flow be 1m/s, medium with often
A plasma generator time of contact is 0.05s, and medium is 0.6s in the non-discharge area residence time.
The organic volatile gas that certain sewage from oil refinery processing unit produces is taken to be tested, before experiment, the content of benzene in exhaust gas
For 120mg/Nm3, after degrading by above-mentioned compartment low-temperature plasma generator, the content of benzene is 74mg/Nm3, benzene removal rate
Up to 38%.
Comparative example 6
The setup parameter of compartment low-temperature plasma generator is as follows：2 dielectric barrier discharge low-temperature plasmas are sent out
Raw device is spaced 0.3m layings in the medium flow direction, total power input 360W, and the speed of media flow be 1m/s, medium with often
A plasma generator time of contact is 0.05s, and medium is 0.3s in the non-discharge area residence time.
Organic volatile gas same as Example 6 is taken to be tested, benzene removal rate is 35%.
Embodiment 7
The setup parameter of compartment low-temperature plasma generator is as follows：2 dielectric barrier discharge low-temperature plasmas are sent out
Raw device is spaced 0.6m layings in the medium flow direction, and the ozone of 5cm thickness is filled between two low-temperature plasma generators
Oxidant layer is decomposed, total power input 360W, the speed of media flow is 1m/s, medium and each plasma generator time of contact
For 0.05s, medium is 2s in the non-discharge area residence time.
The organic volatile gas that certain sewage from oil refinery processing unit produces is taken to be tested, before experiment, the content of benzene in exhaust gas
For 120mg/Nm3, after degrading by above-mentioned compartment low-temperature plasma generator, the content of benzene is 46mg/Nm3, benzene removal rate
Up to 61%.
Comparative example 7
The setup parameter of compartment low-temperature plasma generator is as follows：2 dielectric barrier discharge low-temperature plasmas are sent out
Raw device is spaced 0.6m layings in the medium flow direction, total power input 360W, and the speed of media flow be 1m/s, medium with often
A plasma generator time of contact is 0.05s, and medium is 2s in the non-discharge area residence time.
Organic volatile gas same as Example 7 is taken to be tested, benzene removal rate is 38%.
The utility model is by putting waste water and exhaust gas interval it can be seen from above-described embodiment 1-6 and comparative example 1-6
Electricity, reduces the compound probability of active particle in low-temperature plasma generator, hence it is evident that improve active particle degrading waste water and
The efficiency of pollutant in exhaust gas.
From embodiment 7 and comparative example 7 as can be seen that filling ozone decomposed oxidant layer in compartment low-temperature plasma generator,
The compound probability of active particle in low-temperature plasma generator can further be reduced, hence it is evident that improve active particle degrading waste water and
The efficiency of pollutant in exhaust gas.
Claims (7)
1. a kind of compartment low-temperature plasma generator, including low-temperature plasma electrical source, discharge of plasma in low temperature unit and
Reaction of low temperature plasma device, it is characterised in that two or more discharge of plasma in low temperature unit insertion low temperature etc.
Plasma reactor, in the medium flow direction interval lay, by reaction of low temperature plasma device at intervals of region of discharge and non-
Region of discharge.
2. a kind of compartment low-temperature plasma generator according to claim 1, it is characterised in that medium passes through absence of discharge
The time in region is 0.1s-50s.
3. a kind of compartment low-temperature plasma generator according to claim 1, it is characterised in that low temperature plasma is put
The spacing distance that electric unit is laid in the medium flow direction can be adjusted as needed.
A kind of 4. compartment low-temperature plasma generator according to claim 1, it is characterised in that low temperature plasma electricity
Source is any one in high voltage power supply, DC power supply, the pulse power, and the output power of power supply can be adjusted as needed
Section.
5. a kind of compartment low-temperature plasma generator according to claim 1, it is characterised in that low temperature plasma is put
The discharge type of electric unit is in corona discharge, single dielectric barrier discharge, double-dielectric barrier discharge, glow discharge, radio frequency discharge
Any one.
6. a kind of compartment low-temperature plasma generator according to claim 1, it is characterised in that low temperature plasma is sent out
Raw device is any one in grid type, spool formula or printed line formula.
7. a kind of compartment low-temperature plasma generator according to claim 1, it is characterised in that in the region of discharge
And non-discharge area can fill catalytic ozonation agent, ozone-decomposing agent or activated carbon.
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| CN108325360A (en) * | 2017-06-02 | 2018-07-27 | 中国石油化工股份有限公司 | A kind of compartment low-temperature plasma generator |
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| CN111185049B (en) * | 2018-11-14 | 2022-07-08 | 中国石油化工股份有限公司 | Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net |
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| US20090324443A1 (en) * | 2006-02-17 | 2009-12-31 | John Christopher Whitehead | Gas treatment |
| CN105066271A (en) * | 2015-08-12 | 2015-11-18 | 无锡伦宝环保科技有限公司 | Multi-ion-field indoor air purifier |
| CN105833677A (en) * | 2016-04-19 | 2016-08-10 | 中国石油化工股份有限公司 | Method and equipment for treating volatile organic compounds by low-temperature plasma coupling adsorption |
| CN207324469U (en) * | 2017-06-02 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of compartment low-temperature plasma generator |
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| CN108325360A (en) * | 2017-06-02 | 2018-07-27 | 中国石油化工股份有限公司 | A kind of compartment low-temperature plasma generator |
| CN108325360B (en) * | 2017-06-02 | 2024-03-01 | 中国石油化工股份有限公司 | Interval type low-temperature plasma generator |
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