CN208177209U - A kind of organic waste gas treatment device - Google Patents
A kind of organic waste gas treatment device Download PDFInfo
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- CN208177209U CN208177209U CN201820349480.6U CN201820349480U CN208177209U CN 208177209 U CN208177209 U CN 208177209U CN 201820349480 U CN201820349480 U CN 201820349480U CN 208177209 U CN208177209 U CN 208177209U
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Abstract
This application provides a kind of organic waste gas treatment devices, the processing unit includes air-water mixer, air-water separator that is on the downside of the air-water mixer and being connected with the air-water mixer, the air-water mixer is provided with an exhaust gas entrance, at least one exhaust gas plasma processor is provided on the upside of the air-water mixer, the exhaust gas plasma processor includes first pipe, second pipe in first pipe, the high-field electrode being affixed on first pipe outer wall, formed between the first pipe and second pipe for exhaust gas to it is lower and on the region of discharge that passes through, the upper end of the first pipe of the plasma processor is connected to an induced duct, an air-introduced machine is additionally provided on the induced duct, one is additionally provided on the induced duct for removing in induced duct Moisture and the photocatalysis demisting reflux unit of residual ozone, VOCs, NOx etc. in gas.
Description
Technical field
This application involves a kind of organic waste gas treatment devices.
Background technique
With the rapid development of Chinese national economy, especially chemical industry and manufacturing development, volatile organic
The industrial emission source and discharge amount for closing object VOCs are continuously increased.On surface, spraying process can often generate the exhaust gas containing organic solvent,
Such as dimethylbenzene, toluene, ethyl acetate, butanone；It can also be discharged largely not in the processes such as organic chemicals synthesis and petroleum refining
Same foul waste gas, wherein the often VOCs containing low boiling point, high volatile, not only toxic but also inflammable and explosive.VOCs is not only to people
Body is irritating, toxic action, some or mutagen and carcinogenic substance.Meanwhile alkene and certain aromatic hydrocarbon chemical combination in VOCs
Object once enters environment, and exposure in the sun, can also react to form the photochemical fog of Los Angeles type with nitrogen oxides
Or industrial photochemical smoke, secondary pollution is caused, haze is formed.Therefore, it is controlled after dedusting, desulphurization and denitration and automobile pollution
After reason, the environmental pollution of VOCs exhaust gas has become current Air Pollution Control field urgent problem to be solved.It is badly in need of exploitation one
Kind efficiently, it cleans, have a wide range of application, the industrial waste gas purifying technology that operating cost is cheap and device.
Plasma technique is applied to the improvement of VOCs exhaust gas, because its process does not need addition any chemical reagents, processing
Process is simple and effect is good, cost is relatively low etc. that technical advantages, the focus for having become VOCs waste gas pollution control and treatment in recent years are ground for integrated operation
Study carefully direction and the relevant technologies achievement has been successfully applied in the practical improvement of VOCs exhaust gas.Independent plasma is developed
The direct processing technique of VOCs exhaust gas；After plasma-catalytic oxidation technology, including catalyst merging region of discharge or merging region of discharge
The concerted catalysis oxidation technology at end；In addition, there are also the combination techniques of plasma technique and other waste gas pollution control and treatment technologies.Due to etc.
The generation process of gas ions is to utilize to apply high voltage between electrode pair to the gas discharge filled therebetween and it is made to ionize, hit
The gas " plasma-based " that gas blanket forms electroneutral caused by stable discharging process is worn, it is such as each including a large amount of active species
Kind free radical, high energy electron etc..Therefore, using atmospherical discharges plasma technique can realize in air-flow VOCs it is direct efficiently
Oxidation, purification.Exactly because but also igniting, occurring in this way, existing during handling VOCs exhaust gas using plasma technique
Fire or the security risk of explosion.Therefore, it is low to be only suitable for processing inlet gas concentration for the plasma treatment technique of existing literature report
In 1000mg/m3VOCs exhaust gas；There is also plasma treatment procedures can generate by-product simultaneously, such as ozone, NOX, nitrate
Class or organic intermediate products, such as tar remain in tail gas, form new secondary pollution；Or generate nitrate, secondary have
Machine object etc. adsorbs or is deposited on catalyst surface by catalyst, leads to the inactivation of catalyst, plasma body cooperative is caused to be catalyzed
The decline and its maintenance of oxidation effectiveness, the increase of operating cost.Therefore, these problems become limitation plasma technique again and exist
Apply technical problem urgently to be resolved in VOCs exhaust-gas treatment field.
For break through plasma treatment technique be applicable in organic exhaust gas concentration it is low and generation by-product cause secondary pollution etc.
Application technology bottleneck；Meanwhile during generating plasma using dielectric barrier discharge, when electric discharge block media
Outer layer metal material is as high-voltage discharging electrode, when electrode applies high voltage, the edge (such as metal foil) of this layer of electrode or
All (such as stainless (steel) wire) can generate electric spark, and the air near animating electrode, equally can generate a large amount of plasma (such as
Ozone) it is emitted in the air of operating environment, the pollution to operating space air is caused, the health of related personnel is influenced；If
Plasma emission-control equipment is mounted on comparatively open space, the atmospherical discharges of high-field electrode, generation electric spark
Equally also great security risk can be brought to the production of enterprise.This becomes what plasma waste gas treatment process needed to solve again
Another question.In addition, the emission source of each enterprise VOCs often exist it is multiple or even tens and big in production process
It in most cases and does not work at the same time, discharges VOCs exhaust gas.It therefore, is the energy consumption in saving waste gas treatment process, reduction operation
Processing cost, and guarantee that normal production needs, in gas sampling, treatment process, this is again to the process system of exhaust-gas treatment
Design propose a new demand.
Utility model content
The application technical problems to be solved are to provide a kind of efficient, cleaning, and it is wide, comprehensive to be applicable in organic exhaust gas concentration range
Operating cost is lower, moisture film/quartz ampoule double-dielectric barrier discharge plasma of process safety, modular operation, flexible operation
The organic waste gas treatment device of cooperative photocatalysis technical treatment.
In order to solve the above-mentioned technical problem, this application provides a kind of organic waste gas treatment device, the processing units
Air-water that is including air-water mixer, on the downside of the air-water mixer and being connected with the air-water mixer
Separator, the air-water mixer are provided with an exhaust gas entrance, are provided at least one on the upside of the air-water mixer
A exhaust gas plasma processor, the exhaust gas plasma processor include first pipe, in first pipe
Two pipelines, the high-field electrode being affixed on first pipe outer wall, the lower end of the first pipe and the air-water mixer phase
Connection, the lower end of the second pipe are connected with the air-water separator, the upper end setting of the second pipe
There is a water distributor, the water distributor is used to make the water distribution in the second pipe to second pipe outer wall, in the second pipe
The outer wall in road forms the water film to flow downward, is formed between the first pipe and second pipe and is led to for exhaust gas to lower and upper
The region of discharge crossed, the processing unit further include a sealer, and the exhaust gas plasma processor is sealed in described
Sealer in, the sealer is connected with the air-water mixer, the plasma processor first pipe
The upper end in road is connected to an induced duct, and an air-introduced machine is additionally provided on the induced duct, is also set up on the induced duct
There is one to be used to remove in induced duct moisture and the photocatalysis demisting reflux unit of residual ozone, VOCs, NOx etc. in gas, it is described
Photocatalysis demisting reflux unit the air-water separator is connected to by a reflux line.In a kind of preferred embodiment
In, the first pipe and second pipe coaxial arrangement, the induced duct is corrosion-resistant, nonconducting organic materials such as PP
It is process.
Preferably, the photocatalysis demisting reflux unit includes cabinet, is set to the intracorporal catalytic unit of the case and more
A ultraviolet lamp, the catalytic unit include that glass fibre and modification is arranged in multiple axial directions along the cabinet at certain intervals
In light-sensitive catalyst and transition-metal catalyst on the fiberglass surfacing, multiple ultraviolet lamps are along the glass fibre
Axis is arranged at certain intervals.
Preferably, it is connected between the sealer and the air-water mixer by an ozone induced duct, it is described
Ozone induced duct on to be provided with one smelly in the air-water mixer for the gas in the sealer to be delivered to
Oxygen air-introduced machine is additionally provided with a blow vent being connected with external environment on the sealer, is arranged at the blow vent
There is a VOCs filter.
Preferably, the lower end of the second pipe of the exhaust gas plasma processor passes through an aqueduct and gas-
Separator is connected, and one is additionally provided on the aqueduct for conveying the liquid in the air-water separator
Water pump in the second pipe.
Preferably, the first pipe is made of quartz or ceramic material, and the second pipe is conductive corrosion-resistant
Material is made, and such as stainless steel material, the second pipe is grounding electrode, and the high-field electrode is to be tightly attached to described the
Stainless (steel) wire on one pipeline outer wall.
Preferably, the exhaust gas plasma processor further includes a medium-frequency high-voltage power supply, the high-field electrode with
The high-field electrode of the medium-frequency high-voltage power supply connects, the earthing pole phase of the second pipe and the medium-frequency high-voltage power supply
It connects.
Preferably, the processing unit further includes the liquid level sensor being mounted in air-water separator, is mounted on exhaust gas
The gas monitoring sensors of plasma processor air outlet, the automatic benefit for supplementing water into the air-water separator
Hydrophone.
The exhaust gas purifying method of organic waste gas treatment device described herein, comprising the following steps:
(1) water in air-water separator is delivered in second pipe using water pump first, into the water flow of second pipe
It flow to baffling in water distributor from the bottom up and forms water film vertically downward along the outer wall of second pipe, the water film is in weight
Power effect is lower to pass through the air-water mixer, and falls in the air-water separator；
(2) high voltage power supply is opened, forms high voltage discharge field between first pipe and second pipe, to by region of discharge
Water film electrion；
(3) it then is then turned on air-introduced machine, exhaust gas is made to enter the air-water mixer from exhaust gas entrance, mixed in air-water
In device, VOCs exhaust gas with electric discharge after deionized water mix, pre-oxidize after be fully absorbed, absorb VOCs aqueous solution dependence weigh
Power gravity flow, which enters, carries out gas water separation in air-water separator, the off-gas flows risen after water absorbs enter exhaust gas plasma
The region of discharge of processor carries out plasma oxidation processing, while being handled at the interface of discharging water by further absorption；
(4) ultraviolet lamp in photocatalysis demisting reflux unit is opened, it further will be in tail gas under ultraviolet catalytic oxidation
Secondary pollution oxidation, droplet intercept and abjection, and the de- fog of the cleaning of generation, which flows back into air-water mixer, to be recycled；
(5) ozone air-introduced machine is opened, the exhaust gas generated in sealer is delivered to the air-water by ozone induced duct
In mixer.
Preferably, gas water volume ratio is 2~500 in the air-water mixer.
A kind of organic waste gas treatment device described herein, including one or more exhaust gas plasma processors,
In air-water mixer, VOCs exhaust gas with electric discharge after deionized water mix, pre-oxidize after be fully absorbed, to reduce in gas phase
The concentration of VOCs avoids the risk for causing fire, explosion because of gas phase VOCs concentration height in discharge process.Treated, and air-flow passes through again
The demisting reflux unit in the installation of exhaust gas plasma processor upper end is crossed by droplet interception, abjection, generation contains plasma
It flows back into air-water mixer and is recycled after the de- fog and second pipe outer layer moisture film cocurrent of body processing secondary pollution.
Thereby realize the ozone not being fully utilized for making full use of bi-medium to block electrion to generate, hydrogen peroxide and other two
Safe and efficient processing of the secondary activated product (such as nitrogen oxides) to high concentration VOCs exhaust gas, has expanded previous plasma skill
Permission inlet gas concentration when art safe handling exhaust gas, while it is smelly to can effectively solve the problem that the direct treatment process of plasma is formed again
Secondary environmental pollution problem caused by oxygen, nitrogen oxides and organic by-products are discharged.In addition, present treatment device sealer will be high
It presses electric electrode discharge area and environment to separate, prevent electrion from causing accident and recycles high-field electrode electric discharge to generate ozone etc. living
Property species.Droplet after the photocatalysis demisting reflux unit of the application is used to handle in off-gas flows intercepts, deviates from；Benefit simultaneously
Photoactivation technology is to the remaining ozone not being fully utilized, peroxide in moisture film/quartz ampoule bi-medium to block electrion tail gas
Change hydrogen and other secondary activated products (such as nitrogen oxides) further utilize and deep oxidation removal；The de- fog reflux generated
It is recycled into air-water mixer.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of organic waste gas treatment device described herein；
Fig. 2 is the sectional view in the direction A-A of Fig. 1,
Wherein: 11, air-introduced machine；12, induced duct；2, air-water mixer；21, exhaust gas entrance；3, air-water separator；31,
Water pump；4, exhaust gas plasma processor；41, high-field electrode；42, first pipe；43, second pipe (grounding electrode)；44, in
Frequency high voltage power supply；7, water distributor；6, photocatalysis demisting reflux unit；61, reflux line；9, blind controller system；8, water film；
5, sealer；51, VOCs filter；52, ozone air-introduced machine；53, ozone induced duct.
Specific embodiment
The application is described further in the following with reference to the drawings and specific embodiments, so that those skilled in the art can be with
It more fully understands the application and can be practiced, but illustrated embodiment is not as the restriction to the application.
As shown, the processing unit includes air-water mixing this application provides a kind of organic waste gas treatment device
Device 2, positioned at 2 downside of the air-water mixer and the air-water separator 3 that is connected with the air-water mixer 2, institute
The air-water mixer 2 stated is provided with an exhaust gas entrance 21, and the upside of the air-water mixer 2 is provided at least one exhaust gas
Plasma processor 4, the exhaust gas plasma processor 4 include first pipe 42, the in first pipe 42
Two pipelines 43, the high-field electrode 41 being affixed on 42 outer wall of first pipe, the lower end of the first pipe 42 and the air-water
Mixer 2 is connected, and the lower end of the second pipe 43 is connected with the air-water separator 3, the second pipe
43 upper end is provided with a water distributor 7, and the water distributor 7 is used to make the water distribution in the second pipe 43 to second
43 outer wall of pipeline forms the water film 8 to flow downward, the first pipe 42 and second pipe in the outer wall of second pipe 43
Formed between 43 for exhaust gas to it is lower and on the region of discharge that passes through, the processing unit further includes a sealer 5, the exhaust gas
Plasma processor 4 is sealed in the sealer 5, and the sealer 5 is connected with the air-water mixer 2
Logical, the upper end of the first pipe 42 of the plasma processor is connected to an induced duct 12, on the induced duct 12
It is additionally provided with an air-introduced machine 11, one is additionally provided on the induced duct 12 for removing in induced duct 12 in gas moisture and residual
The photocatalysis demisting reflux unit 6 of after-odour oxygen, VOCs, NOx etc., the photocatalysis demisting reflux unit 6 pass through a return pipe
Road 61 is connected to the air-water separator 3.In a preferred embodiment, the first pipe 42 and second pipe
43 coaxial arrangements, the induced duct 12 are that PP etc. is corrosion-resistant, and nonconducting organic material is process.
The photocatalysis demisting reflux unit 6 includes cabinet, is set to the intracorporal catalytic unit of the case and multiple ultraviolet
Lamp, the catalytic unit include that glass fibre and modification is arranged in the glass in multiple axial directions along the cabinet at certain intervals
Light-sensitive catalyst and transition-metal catalyst on glass fiber surface, multiple ultraviolet lamps along the glass fibre axis with
Certain interval setting.
The lower end of the second pipe 43 of the exhaust gas plasma processor 4 passes through an aqueduct and air-water point
It is connected from device 3, one is additionally provided on the aqueduct for the liquid in the air-water separator 3 to be delivered to
Water pump 31 in the second pipe 43.The first pipe 42 is made of quartz or ceramic material, second pipe
Road 43 is made of conductive corrosion-resistant material, and such as stainless steel material, the second pipe 43 is grounding electrode, the high-voltage electricity
Pole 41 is the stainless (steel) wire being tightly attached on 42 outer wall of first pipe.The exhaust gas plasma processor 4 further includes
One medium-frequency high-voltage power supply 44, the high-field electrode 41 connects with the high-field electrode 41 of the medium-frequency high-voltage power supply 44, described
Second pipe 43 connect with the earthing pole of the medium-frequency high-voltage power supply 44.The processing unit further includes being mounted on gas-
Liquid level sensor in separator 3, is used for the gas monitoring sensors for being mounted on 4 air outlet of exhaust gas plasma processor
The automatic water replenishing device of water is supplemented into the air-water separator 3.
The photocatalysis demisting reflux unit 6 is glass fibre photocatalysis-demisting and return channel, for giving up after handling
Droplet in gas air-flow intercepts, deviates from；Simultaneously using photocatalysis technology to moisture film/quartz ampoule bi-medium to block electrion tail gas
In the remaining ozone not being fully utilized, hydrogen peroxide and other secondary activated products (such as nitrogen oxides) further utilize and
Deep oxidation removal；The de- fog generated, which flows back into air-water mixer 2, to be recycled.Photocatalysis demisting reflux unit 6 be by
The seal case of certain size, ultraviolet lamp group and glass fibre photocatalysis-demister composition.Photocatalysis demisting reflux unit 6 is
It is formed with a thickness of 5mm and size with the matched glass fibre disc of cabinet by one group, the glass fibre in the disc is through TiO2
Catalyst and transition metal copper are modified；A certain number of ultraviolet lamp groups are installed on the axis of glass fibre disc, are constituted
Ultraviolet reinforcing reaction zone.
It is connected between the sealer 5 and the air-water mixer 2 by an ozone induced duct 53, it is described
One is provided on ozone induced duct 53 for the gas in the sealer 5 to be delivered in the air-water mixer 2
Ozone air-introduced machine 52.Specifically, 4 external application PP plate of plasma processor process a region of discharge sealer 5, be responsible for will etc. from
The high voltage discharge field of daughter processor 4 and the partition of external environment；Sealer 5 is by seal case, VOCs filter 51 and ozone
Air-introduced machine 52 and ozone induced duct 53.A certain amount of active carbon profile (can regularly replace) of filling, is used in VOCs filter 51
The VOCs in the surrounding air in sealer 5 is absorbed into, the VOCs for assembling high concentration inside sealer 5 is avoided, causes useless
The explosion of Flash Gas Compression Skid System.Ozone air-introduced machine 52 is responsible for the ozone etc. for generating 41 discharge process of seal case internal cause high-field electrode
It is sent in the main pipe of exhaust gas, exhaust gas is pre-oxidized；According to design requirement, the outlet wind pressure of ozone air-introduced machine 52 is higher than dry
Manage-style pressure, and it is equipped with check-valves, prevent main pipe VOCs exhaust gas recirculation from entering the high voltage discharge field of plasma processor 4.
The working principle of organic waste gas treatment device in one embodiment of the application is: existing according to the emission source of VOCs exhaust gas
Shape and the maximum value for discharging exhaust gas total amount select a set of and matched explosion-proof air-introduced machine 11 of maximum quantity of wind and induced duct 12 to constitute
Gas sampling and transportation system, and using the real-time air quantity of frequency converter adjusting air-introduced machine 11, related VOCs emission source is generated
In gas sampling, the air-water mixer 2 being transported in emission-control equipment；According to the practical collection air quantity of VOCs exhaust gas, open
A certain number of plasma processors 4, and according to certain gas water than by the VOCs in exhaust gas be substantially dissolved in electric discharge after
In deionized water；Then the aqueous solution for absorbing VOCs enters progress gas water separation in air-water separator 3 by flow by gravity.
Aqueous solution water pump 31 in air-water separator 3 squeeze into dielectric barrier discharge plasma processor 4 have turned on it is stainless
In the grounding electrode of steel pipe.The plasma processor 4 is made of the dielectric barrier discharge pipe of multiple same sizes, each electric discharge
Guan Jun uses 60 mesh stainless (steel) wires to be fitted tightly over the outer tube layer as high-field electrode using quartz ampoule as electrion block media
41.And enter stainless steel tube grounding electrode water flow flow to from the bottom up its top installation water distributor 7 in baffling along the electrode
Outer wall form water film 8 vertically downward, enter the height of working electrode in plasma processor 4 in opposite directions with the air-flow of rising
Region of discharge is pressed to carry out plasma oxidation processing.Tail gas after corona treatment is using in 4 rear end of plasma processor
The photocatalysis demisting reflux unit 6 of installation further blocks secondary pollution oxidation, droplet in tail gas under ultraviolet catalytic oxidation
It cuts and deviates from；The de- fog of the cleaning of generation, which flows back into air-water mixer 2, to be recycled.Meanwhile in quartz ampoule high-field electrode 41
External application PP plate makees 41 region of discharge sealer 5 of a high-field electrode and separates region of discharge and external environment.And drawn using an ozone
Blower 52 by region of discharge sealer 5 because working voltage electrode 41 electric discharge generate ozone isoreactivity species be introduced into air inlet main pipe
In, the VOCs in exhaust gas is pre-oxidized.Thus constitute moisture film/quartz ampoule double-dielectric barrier discharge plasma body cooperative
The purifying technology and apparatus of photocatalysis technology processing organic exhaust gas.It realizes and is situated between using photocatalysis technology is double to moisture film/quartz ampoule
Matter stops the remaining ozone not being fully utilized, hydrogen peroxide and other secondary activated product (such as nitrogen oxygen in electrion tail gas
Compound etc.) further utilization and deep oxidation removal, and improve the safe and efficient processing to high concentration VOCs exhaust gas.It should
Technological system has not only expanded permission inlet gas concentration when previous plasma technique safe handling exhaust gas, also thoroughly solves simultaneously
Secondary environmental pollution caused by ozone, nitrogen oxides and the organic by-products that the direct treatment process of plasma is formed are discharged is asked
It inscribes and further improves the purification efficiency to exhaust gas VOCs.
The structure of organic waste gas treatment device in one embodiment of the application and its specific operating process and major technique
Parameter is as follows:
According to the maximum emission flow of VOCs exhaust gas, select 1 matching air quantity, wind pressure explosion-proof air-introduced machine 11 and use corrosion resistant
The induced duct 12 that the PP or PVC material of erosion are process constitutes the collection, conveying and exhaust system of exhaust gas to be processed；Use frequency converter
Adjust the real-time air quantity of air-introduced machine 11；And connected with flange and the relevant device of exhaust-gas treatment, processing tail gas and blowdown stack sealing
It connects.
Meet certain gas-water ratio demand using the processing of the materials such as corrosion-resistant, nonconducting PP or PVC is a set of and be able to satisfy peace
Put the air-water mixer 2 of the size of fulgurite design quantity needs.The air inlet of wherein each discharge tube is controlled with flowmeter
Amount is identical air inflow.The work of air-water mixer 2 is deionized water with water, for VOCs exhaust gas to exist during discharge
Sufficiently pre-oxidized in air-water mixer 2 with mass transfer, fully absorb VOCs component in exhaust gas, to reduce the dense of VOCs in gas phase
Degree avoids the risk for causing fire, explosion because of gas phase VOCs concentration height in discharge process；And electric discharge is promoted to generate plasma pair
The deep oxidation and degradation process of organic matter in liquid phase.
It is needed according to design head, the lower section of air-water mixer 2 is one and seals the big with appropriate volume of installation with it
Small air-water separator 3.The electric discharge aqueous solution that exhaust gas VOCs is fully absorbed in air-water mixer 2 can be swimmingly by gravity
From flowing into air-water separator 3, then from the top of air-water mixer 2, outlet is directly entered phase to the exhaust gas after discharging water absorbs
In the plasma oxidation processor answered.Air-water separator 3 is connected equipped with bottom valve and with 1 water circulating pump 31.According to total gas
Amount and gas water ratio are the technical controlling requirement of 2~500 ranges, and the flow of water pump 31 should meet needs.
A set of quartz ampoule dielectric barrier discharge plasma processor 4 is installed in the upper vertical of air-water mixer 2.Deng
Gas ions processor 4 is made of multiple quartz ampoules, fits closely 60 mesh stainless (steel) wires as high pressure in the outer wall of each quartz ampoule
Electrode 41；Each high-field electrode 41 connects with the high-field electrode 41 of the medium-frequency high-voltage power supply 44 of certain power.Along each
A stainless steel tube is installed in the quartz ampoule axle center of plasma processor 4, each stainless steel tube with the earthing pole of high voltage power supply
Connect, the grounding electrode as plasma processor 4.Each stainless steel tube grounding electrode in plasma processor 4
Upper end install a water distributor 7；The lower end pipeline of each stainless steel tube grounding electrode and the recirculated water of air-water separator 3
Pump 31 is connected.It, can under the control of flowmeter after the aqueous solution unlatching water pump 31 for absorbing exhaust gas in air-water separator 3
In the stainless steel tube grounding electrode for squeezing into each work in plasma processor 4 of equal flows, water flow flow to it from the bottom up
Baffling forms vertically dirty moisture film along the outer wall of the electrode in top water distributor 7, with from air-water divide in mixer mean allocation into
The region of discharge that the off-gas flows risen after discharging water absorbs entered enter each work quartz ampoule in opposite directions carries out plasma oxygen
Change processing.Automatic water replenishing device and VOCs sensor and blind controller system 9.This is by liquid level sensor, air flow sensor, VOCs
Monitor the instruction control system composition relevant to solenoid valve of sensor.Liquid level sensor is mounted in air-water separator 3, is used
It is issued in moisturizing and the instruction for stopping moisturizing；Air flow sensor is for the monitoring of air quantity and the instruction of decision discharge tube working quantity
Publication；In air outlet installation VOCs, ozone and the monitoring nitrogen oxide sensor of exhaust gas plasma processor 4, real-time monitoring
Discharge the concentration of index of correlation in gas.According to the concentration of the VOCs of real-time monitoring, ozone and nitrogen oxides, optimize discharge voltage and
Gas water ratio, so that VOCs exhaust gas qualified discharge, and the discharge of electrion by-product is reduced to greatest extent.
Before exhaust-gas treatment, according to the total charge flow rate of exhaust gas, determine the quantity of operating discharge processing pipe, and correlation is set
Parameter controls the air inlet of each work quartz ampoule, inflow is consistent.Water pump 31 is opened in advance to corresponding flow, makes gas water
Than in 2-500 range；It opens high voltage power supply and adjusts the work that its discharge voltage is capable of stable discharging to plasma processor 4
Under voltage, water absorption system stable operation 5min is allowed first；It is then turned on ozone air-introduced machine 52 and photocatalysis demisting reflux unit 6
In ultraviolet lamp；Finally it is then turned on VOCs exhaust gas air-introduced machine 11.This just constitutes the double medium resistances of moisture film/quartz ampoule of complete set
Keep off the advanced purification technology and device of discharge plasma cooperative photocatalysis processing organic exhaust gas.
According to Drainage feature (such as pollutant kind, emission source intensity of exhaust emissions source height and factory VOCs exhaust gas
Deng) and its prescribed requirement reach the limit value in " discharge standard of air pollutants " (GB16297), with VOCs monitor sense
Device is real time control command, and the technical parameter of exhaust treatment system is arranged, and is in whole system and is fully automated state of a control.
Exhaust treatment system and apolegamy relevant device can be designed than range according to the gas water of optimization, is passed through according to the actual needs of user
Moisture film/quartz ampoule double-dielectric barrier discharge plasma body cooperative photocatalysis organic exhaust gas device for deep cleaning after parameter optimization is
The processing requirement of different types of industrial organic exhaust gas can be met.
Comparative example: it when anhydrous no ultraviolet lamp, directly discharges and the clean-up effect of containing xylene emission is analyzed.
To the industrial waste gas containing dimethylbenzene, seminar has carried out discharge treatment and effect using the technology and its small testing device
Test experiments, small testing device are made of three quartz discharge tubes, and the maximum processing capability for designing exhaust gas is 0.003m3/min.It is real
It tests result and participates in the following table 1.In anhydrous absorption and in the case where without uv light irradiation, which, which can stablize, is put
The supply voltage of electricity work uses the plasma processor 4 to inlet gas concentration for 400mg/m between 40-60V3Diformazan
Benzene exhaust air carries out discharge treatment, and the concentration of gas outlet dimethylbenzene is below discharge standard.But the total volatile organism of gas outlet
The concentration of TVOC significantly rises after voltage is more than 50V, has been more than permitting for TVOC in the electric discharge operating voltage range of 50V-60V
Perhaps discharge standard；The ozone and nitrogen oxides of higher concentration are monitored in gas outlet simultaneously.
When 1 anhydrous no ultraviolet lamp of table, directly discharge to the clean-up effect of containing xylene emission
Embodiment 1: the clean-up effect of containing xylene emission is analyzed in anhydrous absorption directly electric discharge cooperative with ultraviolet radiation catalysis.
To the industrial waste gas containing dimethylbenzene, seminar has carried out electric discharge cooperative with ultraviolet radiation using the technology and its small testing device
Catalytic treatment and measure of merit are tested, and small testing device is made of three quartz discharge tubes, and the maximum processing capability for designing exhaust gas is
0.003m3/min.The plasma processor 4 is capable of the supply voltage of stable discharging work between 40-60V.In anhydrous suction
It receives, but in the case where the ultraviolet lamp group irradiation in unlatching glass fibre photocatalysis-demisting and return channel, it, will under operating voltage
Discharge plasma processing is combined with ultraviolet catalytic oxidation, and collaboration is 400mg/m to inlet gas concentration3Xylene waste gas into
Row processing, experimental result participate in the following table 2.As can be seen from the table, when there is ultraviolet catalytic, gas outlet dimethylbenzene it is dense
Degree further decreases, and under the operating voltage of stable discharging, can make the exit concentration of dimethylbenzene lower than relevant emission standards；Together
When gas outlet the concentration of total volatile organism TVOC also further obtain oxidative degradation under corresponding operating voltage.In purple
The rising that plasma discharge voltage is more than TVOC concentration in tail gas after 50V is effectively inhibited under outer photocatalysis, only most
TVOC is more than discharge standard when high operating discharge voltage 60V；The concentration of the ozone and nitrogen oxides that are monitored in tail gas simultaneously
It is further reduced, especially ozone concentration reduces more obvious；The concentration of nitrogen oxides is relatively high.
The anhydrous absorption of table 2 directly clean-up effect of the electric discharge cooperative photocatalysis to containing xylene emission
Embodiment 2: the clean-up effect of containing xylene emission is analyzed in moisture film-quartz tube discharge cooperative with ultraviolet radiation catalysis.
Using the technology and its small testing device in the case where controlling gas-water ratio, cooperateed with by moisture film-quartz tube discharge purple
Outer photocatalysis has carried out processing to the dimethylbenzene industrial waste gas containing high concentration and measure of merit is tested.When experiment, by high voltage power supply
Operating voltage control in 50V, and open ultraviolet light；The control of dimethylbenzene inlet gas concentration is 1000mg/m3.Under experimental result is participated in
Table 3.In the range that gas-water ratio is 2-500, cooperateed with ultraviolet catalytic to high concentration two using moisture film-high-voltage discharge plasma
Toluene waste gas is handled, and after processor purifies, the concentration of gas outlet dimethylbenzene and TVOC are below discharge standard；Exist simultaneously
The ozone and nitrous oxides concentration that gas outlet monitors are below 1ppm.
(operation 6h's is averaged clean-up effect of the quartz tube discharge cooperative with ultraviolet radiation catalysis to containing xylene emission 3 moisture film of table-
Monitor concentration)
Embodiment 3: long-term clean-up effect point of the moisture film-quartz tube discharge cooperative with ultraviolet radiation catalysis to containing xylene emission
Analysis.
Using the technology and its small testing device in the case where controlling gas-water ratio to the dimethylbenzene industrial waste gas containing high concentration
It has carried out the catalytic treatment of electric discharge cooperative with ultraviolet radiation and measure of merit is tested.When experiment, the operating voltage control of high voltage power supply exists
50V, the control of dimethylbenzene inlet gas concentration are 1000mg/m3.Experiment discovery, under gas-water ratio appropriate, 6 days long-plays should
Technological system is more satisfactory to the treatment effect of exhaust gas, stable.It finds simultaneously, the organic matter in water does not occur accumulation phenomenon
(dimethylbenzene and total organic carbon TOC concentration are very low in water)；Nitrate and nitrite do not occur accumulation phenomenon (nitre in water in water
Hydrochlorate concentration is increased with the raising of air inlet xylene concentration, but is kept within 50mg/L；Nitrite occasionally has detection, dense
It spends lower).
Experimental result participates in the following table 4.In the range that gas-water ratio is 4-500, cooperateed with using moisture film-high-voltage discharge plasma
Ultraviolet catalytic processing technique carries out 6 days discharge treatment to high concentration xylene waste gas, after processor purification, outlet
The concentration of dimethylbenzene and total volatile organism TVOC are substantially less than the concentration of dimethylbenzene in mouth tail gas；It is detected in gas outlet
The concentration of ozone and nitrogen oxides is below 1ppm.Meanwhile dimethylbenzene and total organic carbon TOC concentration are below 10mg/L in water；
Nitrate and nitrite in water do not occur accumulation phenomenon, and nitrate is fluctuated in 20-40mg/L range, and nitrite occasionally has inspection
Out.
(operation 6d's is averaged clean-up effect of the quartz tube discharge cooperative with ultraviolet radiation catalysis to containing xylene emission 4 moisture film of table-
Monitor concentration)
Embodiment 4: the purification of chemical industry synthesis workshop exhaust gas containing phenol is imitated in moisture film-quartz tube discharge cooperative with ultraviolet radiation catalysis
Fruit analysis.
Seminar has carried out processing test to chemical industry synthesis workshop exhaust gas containing phenol using the technology and its small testing device, real
It tests result and participates in the following table 5.As can be seen from the table, during experiment in off-gas flows phenol content about in 1000mg/m3Left and right,
Gas-water ratio is controlled in 2-500 range, and the phenol and TVOC concentration in design treatment limit of power in system discharge outlet tail gas are equal
It can satisfy the requirement limit value of discharge standard.Above-mentioned experimental result illustrates that the technology gives up to phenol containing higher concentration well
Gas similarly has fine clean-up effect.
Clean-up effect (air-flow temperature of 5. moisture film of the table-quartz tube discharge cooperative with ultraviolet radiation catalysis to the exhaust gas containing phenol
Degree is 45 DEG C)
Embodiment described above is only the preferred embodiment lifted to absolutely prove the application, the protection model of the application
It encloses without being limited thereto.Those skilled in the art made equivalent substitute or transformation on the basis of the application, in the application
Protection scope within.The protection scope of the application is subject to claims.
Claims (7)
1. a kind of organic waste gas treatment device, which is characterized in that
The processing unit include air-water mixer, on the downside of the air-water mixer and with the air-water
The air-water separator that mixer is connected, the air-water mixer are provided with an exhaust gas entrance, the air-water mixer
Upside be provided at least one exhaust gas plasma processor,
The exhaust gas plasma processor includes first pipe, the second pipe in first pipe, is affixed on the first pipe
High-field electrode on pipeline outer wall, the lower end of the first pipe are connected with the air-water mixer, second pipe
The lower end in road is connected with the air-water separator, and the upper end of the second pipe is provided with a water distributor, described
Water distributor is used to make the water distribution in the second pipe to second pipe outer wall, is formed in the outer wall of second pipe to dirty
Dynamic water film, formed between the first pipe and second pipe for exhaust gas to it is lower and on the region of discharge that passes through,
The processing unit further includes a sealer, and the exhaust gas plasma processor is sealed in the sealer
Interior, the sealer is connected with the air-water mixer,
The upper end of the first pipe of the plasma processor is connected to an induced duct, also sets up on the induced duct
There is an air-introduced machine, one is additionally provided on the induced duct and is flowed back for removing the photocatalysis demisting of moisture in gas in induced duct
Device, the photocatalysis demisting reflux unit are connected to the air-water separator by a reflux line.
2. a kind of organic waste gas treatment device as described in claim 1, which is characterized in that the photocatalysis demisting, which flows back, to be filled
It sets including cabinet, be set to the intracorporal catalytic unit of the case and multiple ultraviolet lamps, the catalytic unit includes multiple along described
The axial direction of cabinet be arranged at certain intervals glass fibre and modification on the fiberglass surfacing light-sensitive catalyst and transition
Metallic catalyst, multiple ultraviolet lamps are arranged at certain intervals along the axis of the glass fibre.
3. a kind of organic waste gas treatment device as described in claim 1, which is characterized in that the sealer and described
It is connected between air-water mixer by an ozone induced duct, one is provided on the ozone induced duct for will be described
Gas in sealer is delivered to the ozone air-introduced machine in the air-water mixer, is additionally provided with one on the sealer
The blow vent being connected with external environment is provided with a VOCs filter at the blow vent.
4. a kind of organic waste gas treatment device as described in claim 1, which is characterized in that the exhaust gas corona treatment
The lower end of the second pipe of device is connected by an aqueduct with air-water separator, is also set up on the aqueduct
There is a water pump for being delivered to the liquid in the air-water separator in the second pipe.
5. a kind of organic waste gas treatment device as described in claim 1, which is characterized in that the first pipe be quartz or
Ceramic material is made, and the second pipe is made of conductive corrosion-resistant material, and the second pipe is grounding electrode, described
High-field electrode be the stainless (steel) wire being tightly attached on the first pipe outer wall.
6. a kind of organic waste gas treatment device as claimed in claim 5, which is characterized in that the exhaust gas corona treatment
Device further includes a medium-frequency high-voltage power supply, and the high-field electrode connects with the high-field electrode of the medium-frequency high-voltage power supply, described
Second pipe connect with the earthing pole of the medium-frequency high-voltage power supply.
7. a kind of organic waste gas treatment device as described in claim 1, which is characterized in that the processing unit further includes peace
Liquid level sensor in air-water separator, the gas monitoring sensors for being mounted on exhaust gas plasma processor air outlet,
For supplementing the automatic water replenishing device of water into the air-water separator.
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| CN108187464A (en) * | 2018-03-14 | 2018-06-22 | 苏州大学 | A kind of organic waste gas treatment device and exhaust gas purifying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108187464A (en) * | 2018-03-14 | 2018-06-22 | 苏州大学 | A kind of organic waste gas treatment device and exhaust gas purifying method |
| CN108187464B (en) * | 2018-03-14 | 2023-10-27 | 苏州大学 | Organic waste gas treatment device and waste gas purification method |
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