CN105457487A - Modularized photocatalytic device for organic waste gas treatment and method - Google Patents
Modularized photocatalytic device for organic waste gas treatment and method Download PDFInfo
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- CN105457487A CN105457487A CN201510924375.1A CN201510924375A CN105457487A CN 105457487 A CN105457487 A CN 105457487A CN 201510924375 A CN201510924375 A CN 201510924375A CN 105457487 A CN105457487 A CN 105457487A
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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
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/14—Packed scrubbers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
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Abstract
The invention discloses a modularized photocatalytic device for organic waste gas treatment and a method. The device comprises a shell, one end of the shell is provided with a gas inlet connected with a gas inlet pipe, the other end of the shell is provided with a gas outlet connected with an exhaust pipe, and the exhaust pipe is connected with a draught fan module; the interior of the shell is sequentially divided into a pretreatment section, a main reaction section and an aftertreatment section in the direction from the gas inlet to the gas outlet, and the interior of the pretreatment section and the interior of the aftertreatment section are each provided with a spraying module; photocatalytic modules and ultraviolet lamp modules are alternately arranged in the main reaction section in the direction from the pretreatment section to the aftertreatment section. According to the treatment device and technology, the photocatalytic treatment efficiency is improved through water spraying pretreatment, the water spraying aftertreatment efficiency is improved through photocatalytic treatment, the waste gas matter can be further removed by adopting water spraying in the aftertreatment workshop section, and all the sections cooperatively act to improve the organic waste gas purifying effect.
Description
Technical field
The present invention relates to a kind of organic waste gas treatment device and method, be specifically related to a kind of modular optical catalytic unit for VOCs treatment and method.
Background technology
Atmosphere pollution is one of the most outstanding at present environmental problem of China, and industrial organic exhaust gas is the important sources of atmosphere pollution, is detrimental to health.In recent years, along with the development of society, material progress and growth in the living standard, the enhancing of environmental protection consciousness, the environmental pollution that the discharge of industrial organic exhaust gas causes and the focus that governments at all levels and the common people pay close attention to more and more is become to the serious harm of health.
In recent years, photocatalysis technology is more and more noticeable in the development of industrial organic exhaust gas process field.Such as, publication number is that the Chinese invention patent application document of CN104971619A discloses a kind of combination type photocatalysis organic waste-gas purification machine, belong to air cleaning facility technical field, comprise front-end pipelines successively and be connected shell, front end Rose Box, the integrated purifying body by multiple purifying box connection in series-parallel, rear end Rose Box, rear end pipeline linking shell; Be provided with filter in the Rose Box of front end, be provided with activated carbon filter layer in the Rose Box of rear end, purifying box is also equipped with electric box; Purifying box is cube structure, comprises many seamed edges, is positioned on described each seamed edge and is provided with active connector, be fixedly connected with between each purifying box by active connector; Be positioned on seamed edge and be also provided with elastic sealed body.
But photocatalysis apparatus common at present still has many weak points, limit the application of this technology.The major defect of photocatalysis apparatus common at present has: adopt photocatalysis treatment separately, lacks pretreatment and post processing means; Device is not quick detachable, and assembly is difficult to change.
Such as, Authorization Notice No. is that the Chinese utility model patent of CN204522751U discloses a kind of organic exhaust gas photocatalysis treatment device, comprise shell, the upper end of shell is gas outlet, lower end is air inlet, many quartz burners and polylith photocatalyst plate are vertically installed in shell, described quartz burner and the spaced arrangement of photocatalyst plate, the lower end of quartz burner and photocatalyst plate is arranged on bracing frame, many water pipes are distributed with above quartz burner and photocatalyst plate, described water pipe is provided with shower nozzle, described shower nozzle is hydroblasting photocatalyst plate down, described air inlet bridge piece, discharge outlet is had bottom bend pipe.
Authorization Notice No. is that the Chinese utility model patent of CN204522749U discloses a kind of photochemical catalytic oxidation organic waste gas treatment device, comprise shell, the two ends air inlet of shell and gas outlet, multiple quartz burner and photocatalyst plate is had in shell, photocatalyst plate one end is fixing on a mounting board, the photocatalyst plate other end is openend, and photocatalyst plate has multiple passage; Installing plate has venthole, has water distributing plate between the openend of air inlet and photocatalyst plate, water distributing plate is hollow structure, hollow space is communicated with water inlet, water distributing plate has multiple through hole, water distributing plate is also distributed with multiple fountain head, fountain head is communicated with the hollow structure of water distributing plate; Outer casing bottom also has delivery port.
Above-mentioned two kinds of devices all exist and adopt separately photocatalysis treatment, lack that pretreatment and post processing means and device are not quick detachable, assembly is difficult to technical problems such as changing.
Summary of the invention
The invention provides a kind of modular optical catalytic unit for VOCs treatment and method, treatment effect is good, and assembly is easily changed, and system architecture is reasonable.
For a modular optical catalytic unit for VOCs treatment, comprise housing, one end of described housing is with connecting the air inlet of air inlet pipe, the other end with the gas outlet connecting blast pipe, described blast pipe connecting fan module; In described housing by air inlet to direction, gas outlet be divided into successively pretreatment section, main reaction section with post processing section, in described pretreatment section and post processing section, spray module is all set; Photocatalysis module and ultraviolet lamp module is arranged alternately by pretreatment section to post processing section direction in described main reaction section.
The catalyst of existing photocatalysis apparatus is coated on device inwall, and catalytic reaction concentrates on wall, and the waste gas that device central authorities pass through cannot fully contact catalyst be surperficial.Compared to traditional photocatalysis apparatus, present invention employs the mode that uviol lamp and photocatalysis assembly are installed separately, wherein catalyst module not limit by apparatus structure, the variety carrier such as honeycomb aluminum plate, nickel foam filter screen can be selected, the whole cross section of cladding system, makes the contact of waste gas and catalyst surface more abundant.
In addition, the present invention creatively by Water spray module integration auto levelizer, for pretreatment and post processing.Compared to filtration pretreatment, Water spray can not only remove particle, can also remove water miscible organic matter, improve waste gas humidity simultaneously, is conducive to subsequent optical catalytic treatment.
Preferably, described photocatalysis module and ultraviolet lamp module are all installed in described main reaction section with drawer type.Main paragraph adopts photocatalysis module and the ultraviolet lamp module cross arrangement of drawer type, and assembly is dismantled, it is very easy to change, on the one hand all kinds of organic exhaust gas of adjustable module adaptive, is conducive to operation maintenance on the other hand.
As preferably, described photocatalysis module comprises:
The the first drawer type carrier be slidably matched with described main reaction intersegmental part;
Be placed in the honeycomb aluminum plate carrier on described first drawer type carrier, this honeycomb aluminum plate carrier surface loaded optic catalyst.
Catalyst module can select honeycomb aluminum plate to be carrier loaded nano-TiO
2catalyst, also can select according to treatment effect the other materials such as nickel foam as carrier, select other catalyst type according to the kind of organic exhaust gas.
Catalyst module is fixed on and can on the drawer module of unidirectional pull-out, such as, welding manner can be adopted to fix.
As preferably, described spray module comprises:
Be arranged at some shower nozzles at described pretreatment section top;
Be arranged at the filler below described shower nozzle;
Be arranged at filler side and the mesh mist eliminator of close main processing section.
Further preferably, described shower nozzle is set to three, and the spray angles of each shower nozzle is 120 degree, and single shower nozzle spray flux is about 1.5m
3/ h; Filler is φ 47 plastic flower ring filler.
The outer water pump of shower nozzle, further preferably, for preventing organic exhaust gas from corroding, select FRP material vertical water pump, pump motor selects fire-proof motor; Mesh mist eliminator preferably adopts the demist of drawer type stainless steel cloth block, controls waste gas humidity.
Arranging in pretreatment section and in post processing section is identical.
As preferably, described ultraviolet lamp module comprises:
The the second drawer type carrier be slidably matched with described main reaction intersegmental part;
Be installed on the some uviol lamps on described second drawer type carrier.
Further preferably, uviol lamp fluorescent tube installation direction is parallel with gas flow.
Still more preferably, for guaranteeing lighting effect, facilitate rectifier to install, the spacing between adjacent uviol lamp is 150mm ~ 200mm simultaneously.
As preferably, described blower fan module comprises:
Blower fan, the air inlet of this blower fan is connected with aiutage, gas outlet is connected with aiutage;
Exhaust thief hatch, is arranged on described aiutage;
Fan platform, is located at below described blower fan for supporting described blower fan.
The present invention also provides a kind of and utilizes described modular optical catalytic unit to carry out the method for VOCs treatment, comprises the steps:
(1) organic exhaust gas is introduced in modular optical catalytic unit, first in pretreatment section, carries out spray pretreatment;
(2) enter in main reaction section, successively through multistage ultraviolet catalytic process through spraying pretreated waste gas;
(3) waste gas after ultraviolet catalytic process enters in post processing section and carries out spray post processing;
(4) Purge gas after spraying post processing is discharged by blast pipe.
Preferably, described organic exhaust gas flow-control is at 800 ~ 1200m
3/ h, in organic exhaust gas, organic contamination substrate concentration is 80 ~ 120mg/m
3, the spray flux in pretreatment section and post processing section is 4 ~ 5m
3/ h.
Further preferably, described organic exhaust gas controls at 1000m at exhaust gas flow
3/ h, in organic exhaust gas, organic pollution is preferably toluene, and toluene concentration is 100mg/m
3, the spray flux in pretreatment section and post processing section is 4.5m
3/ h.
The catalyst that treating apparatus of the present invention and technique can select load different according to the kind of organic exhaust gas, with conventional nano-TiO
2catalyst is main.Carrier material can be selected, based on honeycomb aluminum plate and nickel foam filter screen according to the air quantity of organic exhaust gas and catalyst type.
Water spray pre-treatment improves photocatalysis treatment efficiency, and photocatalysis treatment improves the efficiency of Water spray post processing, and treatment and finishing section adopts Water spray can remove such material further, and each stage acting in conjunction, provides the clean-up effect of organic exhaust gas.Compared with prior art, the good effect of modular optical catalytic unit of the present invention is as follows:
(1) light-catalysed main paragraph adopts photocatalysis module and the ultraviolet lamp module cross arrangement of drawer type, and assembly is dismantled, it is very easy to change, on the one hand all kinds of organic exhaust gas of adjustable module adaptive, is conducive to operation maintenance on the other hand.Due to industrial organic exhaust gas complicated component, different pollutant physicochemical property differs greatly, its decompose required for energy and the time also have very big-difference.Therefore, in photocatalysis technology application, different catalyst be adopted, uviol lamp specification deals with different emission source from form.In existing technology application, usually only design a kind of structure and tackle all kinds of emission source, usually occur the situation that treatment effeciency is low.After the present invention adopts modularized design, catalyst, the specification of uviol lamp and combining form can be adjusted at any time, according to exhaust-gas treatment effect, obtain the design being applicable to all kinds of emission source.The uviol lamp assembly of photocatalysis apparatus is easy loss component, and in photocatalysis apparatus use procedure, it is the key factor that treatment effeciency declines that uviol lamp damages.All kinds of product can be produced in the day-to-day operation of VOCs treatment equipment, stick to the surface of apparatus assembly, need periodic cleaning.The present invention adopts modularized design, and uviol lamp and each assembly easy to clean and replacing, operation maintenance is easy.
(2) adopt Water spray module as pre-treatment and aftertreatment technology, promote treatment effeciency.Large quantity research shows, the increase of humidity can improve the degradation efficiency of organic matter in photocatalysis system, and its principle is that the hydroxyl radical free radical (OH) that hydrone photodissociation produces has strong oxidizing property, is the key factor in photocatalysis system.The present invention adopts Water spray module as pre-treating technology, can remove the water-soluble substances in waste gas on the one hand, suitably can increase the humidity of waste gas on the other hand, improves photocatalysis efficiency.After light-catalyzed reaction occurs, partial organic substances permineralization is water and carbon dioxide, but still has large amount of organic cannot permineralization, is only be decomposed into small-molecule substance, needs to process further.Part small organic molecule is better water-soluble, and the present invention adopts Water spray module at treatment and finishing section, can remove such material further.
(2) Blower Housing and impeller are FRP material, and antiseptic property is good, are applicable to most of organic exhaust gas and Acid-base Gas process.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention front views.
Fig. 2 is that the present invention sprays module front view.
Fig. 3 is photocatalysis module front view of the present invention.
Fig. 4 is ultraviolet lamp module front view of the present invention.
Fig. 5 is blower fan module front view of the present invention.
Shown in figure, Reference numeral is as follows:
1-air inlet pipe 2-air inlet thief hatch 3-housing
4-sprays module 5-photocatalysis module 6-ultraviolet lamp module
7-blast pipe 8-blower fan module 9-support
41-shower nozzle 42-filler 43-mesh mist eliminator
44-water pump 51-honeycomb aluminum plate carrier 52-first pulley slide bar
53-first drawer type carrier 61-uviol lamp 62-ballast
63-second pulley slide bar 64-second drawer type carrier 81-aiutage
82-is vented thief hatch 83-blower fan 84-fan platform.
Detailed description of the invention
As shown in Figure 1, be the front view of apparatus of the present invention structural representation, the reactor comprising support 9 and be arranged on support 9, support 9 adopts flange beam stand.
Reactor comprises housing 3, and housing 3 level is rack-mount, and one end of housing 3 is with air inlet, air inlet connects air inlet pipe 1, and air inlet pipe 1 is provided with into thief hatch 2, and the other end of housing 3 is with gas outlet, gas outlet connects blast pipe 7, blast pipe 7 connecting fan module 8.
Pretreatment section, main reaction section and post processing section is divided into successively from air inlet to direction, gas outlet in housing 3, in pretreatment section and post processing section, spray module 4 is all installed, arrange photocatalysis module 5 and ultraviolet lamp module 6 along gas flow interval in main reaction section, photocatalysis module and ultraviolet lamp module all adopt drawer type to be installed in main reaction section.
As shown in Figure 2, spray module comprises the structural representation front view of spray module 4: the some shower nozzles 41 being arranged at pretreatment section top; Be arranged at the filler 42 below shower nozzle; Be arranged at filler side and the mesh mist eliminator 43 of close main processing section; Shower nozzle is connected with water pump 44 by pipeline.
In present embodiment, shower nozzle is set to three, and the spray angles of each shower nozzle is 120 degree, and single shower nozzle spray flux is about 1.5m
3/ h; Filler is φ 47 plastic flower ring filler, and FRP material vertical water pump selected by water pump, and pump motor selects fire-proof motor; Mesh mist eliminator preferably adopts the demist of drawer type stainless steel cloth block, controls waste gas humidity.Arranging in pretreatment section and in post processing section is identical.
The front view of photocatalysis module as shown in Figure 3, comprising: the first drawer type carrier 53, the first drawer type carrier 53 be slidably matched with main reaction intersegmental part is connected by the first pulley slide bar 52 with main reaction intersegmental part; Be placed in the honeycomb aluminum plate carrier 52 on the first drawer type carrier 53, this honeycomb aluminum plate carrier surface loaded optic catalyst.
In present embodiment, catalyst module take honeycomb aluminum plate as carrier, loaded with nano TiO
2catalyst, being welded on can on the drawer module of unidirectional pull-out.
The front view of ultraviolet lamp module as shown in Figure 4, comprising: the second drawer type carrier 64, the second drawer type carrier 64 be slidably matched with main reaction intersegmental part is connected by the second pulley slide bar 63 with main reaction intersegmental part; Be installed on the some uviol lamps 61 on the second drawer type carrier 64, each uviol lamp configuration ballast 62, all uviol lamp fluorescent tube installation directions are consistent with gas flow, namely the length direction of fluorescent tube extends along air-flow, for guaranteeing lighting effect, facilitate rectifier to install, the spacing between adjacent uviol lamp is advisable with 150mm ~ 200mm simultaneously.
The structural representation front view of blower fan module 8 as shown in Figure 5, comprising: fan platform 84; Be placed in the blower fan 83 on fan platform, the air inlet of this blower fan is connected with aiutage 7, gas outlet is connected with aiutage 81; Aiutage 81 is arranged exhaust thief hatch 82,
Embodiment
Simulation typical industry toxic emission situation, preparation main polluted factors is the waste gas of toluene, and control exhaust gas flow is 1000m
3/ h, toluene concentration is 100mg/m
3left and right.As set up photocatalysis apparatus shown in the drawings, device has 3 ultraviolet lamp modules, and each module is equipped with 5 uviol lamps; Uviol lamp is U-shaped lamp, length 810mm, power 150w, wavelength peak 254nm.2 photocatalysis modules, form photocatalysis main paragraph with ultraviolet lamp module.Install Water spray module respectively before and after photocatalysis main paragraph, each module top is equipped with 3 shower nozzles, and spray flow is 4.5m
3/ h.End is blower fan module, and fan delivery is 1000m
3/ h, maximum wind pressure is 1500Pa, is equipped with frequency converter regulating flow quantity.
During plant running, first open blower fan, detect fan delivery, regulate fan operation frequency simultaneously, fan delivery is adjusted to 1000m
3/ h.Open water pump and uviol lamp, run after 3 minutes, pass into the toluene waste gas of simulation.After stable, sample at the thief hatch of device leading portion and the thief hatch of aiutage simultaneously, adopt charcoal absorption pipe continuous sampling 15min.Detect the toluene concentration in sample, method is charcoal absorption carbon disulfide desorption-gas chromatography.
Testing result shows, and the photocatalysis apparatus in this embodiment has good treatment effect to toluene waste gas, and treatment effeciency reaches about 75% ~ 80%, and treatment effect is stablized.
Above-described embodiment is the good embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. for a modular optical catalytic unit for VOCs treatment, comprise housing, one end of described housing is with connecting the air inlet of air inlet pipe, the other end with the gas outlet connecting blast pipe, described blast pipe connecting fan module; It is characterized in that, in described housing by air inlet to direction, gas outlet be divided into successively pretreatment section, main reaction section with post processing section, in described pretreatment section and post processing section, spray module is all set; Photocatalysis module and ultraviolet lamp module is arranged alternately by pretreatment section to post processing section direction in described main reaction section.
2. according to claim 1 for the modular optical catalytic unit of VOCs treatment, it is characterized in that, described photocatalysis module and ultraviolet lamp module are all installed in described main reaction section with drawer type.
3. according to claim 1 for the modular optical catalytic unit of VOCs treatment, it is characterized in that, described spray module comprises:
Be arranged at some shower nozzles at described pretreatment section top;
Be arranged at the filler below described shower nozzle;
Be arranged at filler side and the mesh mist eliminator of close main processing section.
4. according to claim 1 for the modular optical catalytic unit of VOCs treatment, it is characterized in that, described photocatalysis module comprises:
The the first drawer type carrier be slidably matched with described main reaction intersegmental part;
Be placed in the honeycomb aluminum plate carrier on described first drawer type carrier, this honeycomb aluminum plate carrier surface loaded optic catalyst.
5., according to claim 1 for the modular optical catalytic unit of VOCs treatment, it is characterized in that, described ultraviolet lamp module comprises:
The the second drawer type carrier be slidably matched with described main reaction intersegmental part;
Be installed on the some uviol lamps on described second drawer type carrier.
6., according to claim 5 for the modular optical catalytic unit of VOCs treatment, it is characterized in that, uviol lamp fluorescent tube installation direction is parallel with gas flow.
7. according to claim 6 for the modular optical catalytic unit of VOCs treatment, it is characterized in that, the spacing between adjacent uviol lamp is 150mm ~ 200mm.
8. utilize modular optical catalytic unit described in the arbitrary claim of claim 1 ~ 7 to carry out a method for VOCs treatment, it is characterized in that, comprise the steps:
(1) organic exhaust gas is introduced in modular optical catalytic unit, first in pretreatment section, carries out spray pretreatment;
(2) enter in main reaction section, successively through multistage ultraviolet catalytic process through spraying pretreated waste gas;
(3) waste gas after ultraviolet catalytic process enters in post processing section and carries out spray post processing;
(4) Purge gas after spraying post processing is discharged by blast pipe.
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| CN201510924375.1A CN105457487A (en) | 2015-12-13 | 2015-12-13 | Modularized photocatalytic device for organic waste gas treatment and method |
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|---|---|---|---|
| CN201510924375.1A CN105457487A (en) | 2015-12-13 | 2015-12-13 | Modularized photocatalytic device for organic waste gas treatment and method |
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Cited By (10)
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| CN106492572A (en) * | 2016-11-07 | 2017-03-15 | 无锡艾科瑞思产品设计与研究有限公司 | A kind of board-washing machine that waste gas can be purified |
| CN106492594A (en) * | 2017-01-05 | 2017-03-15 | 中山市恒雅环保工程有限公司 | A kind of VOCs exhaust treatment systems and its processing method |
| CN106669414A (en) * | 2017-01-05 | 2017-05-17 | 上海玖富环保科技有限公司 | Waste gas treatment equipment |
| CN106731809A (en) * | 2017-01-05 | 2017-05-31 | 上海玖富环保科技有限公司 | A kind of photooxidation catalytic waste gas processing equipment |
| CN108176222A (en) * | 2017-12-29 | 2018-06-19 | 安徽蓝清源环境科技有限公司 | A kind of safe and intelligent exhaust treatment system |
| CN108543417A (en) * | 2018-03-12 | 2018-09-18 | 陕西师范大学 | A kind of photocatalysis apparatus easy to use |
| CN108686501A (en) * | 2018-07-20 | 2018-10-23 | 苏州方舟环保科技有限公司 | The emission-control equipment of experiments supporting room |
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| CN109351179A (en) * | 2018-11-23 | 2019-02-19 | 苏州市科林除尘设备有限公司 | A kind of device for catalytic treatment for solvent recovery exhaust gas |
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| CN109107383A (en) * | 2018-09-30 | 2019-01-01 | 广东兴科环保科技有限公司 | Mimicry formula cleaning equipment for waste organic gas and its purification method |
| CN109351179A (en) * | 2018-11-23 | 2019-02-19 | 苏州市科林除尘设备有限公司 | A kind of device for catalytic treatment for solvent recovery exhaust gas |
| CN109731471A (en) * | 2019-03-07 | 2019-05-10 | 华蓝达废气治理湖北有限公司 | A kind of exhaust gas photocatalysis treatment equipment |
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Application publication date: 20160406 |