CN109351138A - A kind of VOCs waste gas from incinerator processing method and processing device - Google Patents
A kind of VOCs waste gas from incinerator processing method and processing device Download PDFInfo
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- CN109351138A CN109351138A CN201811292986.9A CN201811292986A CN109351138A CN 109351138 A CN109351138 A CN 109351138A CN 201811292986 A CN201811292986 A CN 201811292986A CN 109351138 A CN109351138 A CN 109351138A
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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
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/323—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
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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
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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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
- B01D53/75—Multi-step processes
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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
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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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
- 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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Abstract
The invention belongs to technical field of waste gas treatment, disclose a kind of VOCs waste gas from incinerator processing method, and VOCs waste gas from incinerator successively passes through aeration tower, low-temperature plasma device and adsorbent equipment processing, can effectively remove industrial VOCs waste gas from incinerator, reach discharge standard.The process flow of VOCs waste gas from incinerator is short and simple, and low energy consumption, can effectively remove VOCs industrial waste gas, avoid causing secondary pollution to environment.The invention also discloses a kind of devices for carrying out the processing of VOCs waste gas from incinerator, including gas washing module, reaction module and adsorption module；The gas washing module includes aeration tower and the lye storage device set on the bottom of the aeration tower, and the reaction module includes low-temperature plasma device, and the adsorption module includes adsorbent equipment and exhaust air-introduced machine.
Description
Technical field
The invention belongs to technical field of waste gas treatment, and in particular to a kind of VOCs waste gas from incinerator processing method and processing device.
Background technique
Volatile organic matter (VOCs, volatile organic compounds), refers to that saturated vapor pressure is big under room temperature
In 260 DEG C of organic compounds below, or at 20 °C, vapour pressure is more than or equal to 10Pa to boiling point under 70Pa, normal pressure
With corresponding volatile whole organic compounds.The formation of VOCs is various, predominantly industrial organic exhaust gas, for example,
The tail gas given off when running car, family's coatings, pharmaceutical industry, plating, plywood making, wastewater treatment and heavy metal smelting
Refining pollution etc. can also discharge VOCs exhaust gas, seriously polluted air.
Existing VOCs waste gas processing method specifically includes that active carbon adsorption, absorption process, combustion method and biofiltration
Method, in numerous VOCs waste gas processing methods, combustion method be in engineering compared with frequently with more effective technology, however VOCs
Exhaust gas still can generate some pernicious gases, such as nitrogen oxides after burning.If direct emission can cause secondary pollution to environment,
Therefore the tail gas of VOCs burned waste gas is further processed.
In recent years, non-thermal plasma trap is increasingly being applied to exhaust-gas treatment field, and catharsis mechanism includes
Two aspects: first is that moment high energy caused by high-frequency discharge opens some nocuousness enough during generating plasma
Chemical bond in gas molecule is allowed to be decomposed into simple substance atom or harmless molecule；Second is that including a large amount of high energy in plasma
Electronics, negative ions, excited state particle and the free radical with strong oxidizing property, these active particles and part pernicious gas molecule
Collision combines, and under electric field action, pernicious gas molecule is made to be in excitation state when the energy that pernicious gas molecule obtains is greater than it
When the combination energy of molecular bond energy, the chemical bond rupture of pernicious gas molecule directly resolves into simple substance atom or by single atom structure
At innocuous gas molecule.
But it when using only Low Temperature Plasma Treating VOCs burned waste gas tail gas, can't remove effectively
Harmful substance in VOCs burned waste gas tail gas.
Summary of the invention
The present invention provides a kind of VOCs waste gas from incinerator processing method, and VOCs waste gas from incinerator successively passes through aeration tower, low temperature etc.
Ion unit and adsorbent equipment processing, can effectively remove industrial VOCs waste gas from incinerator, reach discharge standard.
The present invention also provides a kind of devices of VOCs waste gas from incinerator processing method.
The present invention is to solve a kind of technical solution that its technical problem provides to be:
A kind of VOCs waste gas from incinerator processing method, comprising the following steps:
S1, VOCs waste gas from incinerator enter aeration tower after collecting, and the absorbing liquid through spraying in aeration tower removes in exhaust gas
Sour gas；
S2, VOCs waste gas from incinerator from aeration tower outlet enter low-temperature plasma device, VOCs waste gas from incinerator and low temperature etc. from
Active particle in sub-device occurs chemical reaction and removes pernicious gas molecule；Active particle includes high energy electron, excitation state grain
Son, ozone and OH, HO2, O free radical；
S3, VOCs waste gas from incinerator enter adsorbent equipment through blower from the outlet of low-temperature plasma device and remove organic exhaust gas；
S4, VOCs waste gas from incinerator enter tapping equipment discharge from the outlet of adsorbent equipment.
A kind of device for realizing above-mentioned VOCs waste gas from incinerator processing method, including gas washing module, reaction module and absorption
Module；The gas washing module includes aeration tower and the lye storage device set on the bottom of the aeration tower, the reaction module
Including low-temperature plasma device, the adsorption module includes adsorbent equipment and exhaust air-introduced machine.
As an improvement of the above technical solution, the aeration tower is packed tower, is provided with two-stage spraying layer, every grade of spraying layer
It include spray head, packing layer and water distributor.
As a further improvement of the above technical scheme, the filler in described filler layer is polyhedron empty ball, Pall ring, drawing
At least one of western ring.
As a further improvement of the above technical scheme, the absorbing liquid of the spray head spray is sodium hydroxide solution.
As an improvement of the above technical solution, the low-temperature plasma device includes shell and the line in the shell
Cartridge type plasma processing apparatus；The barrel of the spool formula plasma processing apparatus is grounded, and the discharge electrode of axle center setting is external etc.
Ion high voltage power supply.
As an improvement of the above technical solution, the inorganic salts being precipitated in the lye storage device are through solid-liquid separating equipment point
From transporting, solution enters the aeration tower circulated sprinkling and absorbs exhaust gas.
As an improvement of the above technical solution, the bottom of the aeration tower is equipped with pH monitoring device and liquid-adding device, institute
Absorbing liquid can be automatically replenished to the aeration tower by stating liquid-adding device.
As an improvement of the above technical solution, further include for convey collect after VOCs waste gas from incinerator air inlet, institute
Air inlet is stated equipped with air pressure monitoring device, the variable-frequency motor linkage of the air pressure monitoring device and the exhaust air-introduced machine.
As an improvement of the above technical solution, the adsorbent equipment includes that granular activated carbon adsorption box and activated carbon fibre are inhaled
Attached case, exhaust gas, which is first passed through the granular activated carbon adsorption box and is passed through the carbon fiber adsorption and catalytic combustion case again, to be adsorbed.
The method have the benefit that: VOCs waste gas from incinerator can remove most of sour gas after aeration tower is handled
Body；It is chemically reacted with the active particle in low-temperature plasma device, pernicious gas is converted to innocuous substance；Finally pass through
Organic exhaust gas can be removed after adsorbent equipment absorption, is reached after discharge standard through chimney high altitude discharge.The processing of VOCs waste gas from incinerator
Process is short and simple, and low energy consumption, can effectively remove VOCs industrial waste gas, avoid causing secondary pollution to environment.
Detailed description of the invention
For the clearer technical solution illustrated in the embodiment of the present invention, will make below to required in embodiment description
Attached drawing briefly describes.
Fig. 1 is the process flow chart of the embodiment of the present invention.
Specific embodiment
Carried out with reference to embodiments with technical effect of the attached drawing to design of the invention, specific structure and generation it is clear,
It is fully described by, to fully understand the purpose of the present invention, scheme and effect.It should be noted that in the absence of conflict originally
The feature in embodiment and embodiment in application can be combined with each other.Furthermore the upper and lower, left and right etc. used in the present invention
It describes in only opposite figure for each component part mutual alignment relation of the present invention.
Fig. 1 shows a kind of device of VOCs waste gas from incinerator processing, including gas washing module, reaction module and adsorption module,
Gas washing module includes aeration tower 2 and the lye storage device set on the bottom of aeration tower 2；Reaction module includes low-temperature plasma dress
Set 3；Adsorption module includes adsorbent equipment and exhaust air-introduced machine 5.
It further include air inlet 1, blower 4, variable-frequency motor 6 and chimney 7.It is connected between each device by exhaust piping 8, air inlet
Mouth 1 is connected with aeration tower 2 by air inlet pipe, and air inlet pipe stretches to the center of 2 bottom of aeration tower, and Open Side Down for air inlet pipe；
The air pressure monitoring device 9 of monitoring gas flow is additionally provided on air inlet.
VOCs waste gas from incinerator enters the bottom of aeration tower after collecting by air inlet, and aeration tower is packed tower, is provided with
Two-stage spraying layer, spraying layer include spray head, packing layer and water distributor；Exhaust gas rises from the bottom of aeration tower through two-stage spraying layer
The processing of absorbing liquid can remove most of sour gas and a small amount of organic exhaust gas.
Absorbing liquid can be sodium hydroxide solution, potassium hydroxide solution or sodium carbonate liquor, and the aeration tower of the present embodiment is adopted
It is the sodium hydroxide solution of high concentration.
The bottom of aeration tower is additionally provided with the alkali storage device of storage sodium hydroxide solution, and NaOH solution circulating pump 10 deposits lye
Sodium hydroxide solution in storage device is delivered to spray head；Absorbing liquid generates inorganic salts after absorbing exhaust gas, inorganic in absorbing liquid
Salt accumulation is precipitated to after being saturated, and may separate out inorganic salts after the separation of solid-liquid separating equipment 11, inorganic salts are transported through conveying device 12
From remaining solution flows into lye storage device and enters aeration tower circulated sprinkling absorption exhaust gas.The bottom of aeration tower is equipped with pH
Monitoring device 13, after the lye in aeration tower constantly absorbs exhaust gas, pH drops to setting value, and the liquid-adding device 14 of aeration tower can be to
The lye storage device of aeration tower is automatically replenished the sodium hydroxide solution of high concentration.
The filler that packing layer is filled can be polyhedron empty ball, Pall ring, Raschig ring；Filler in the present embodiment uses
Be polyhedron empty ball made of polypropylene material, there is big light-weight, heat-resisting, corrosion-resistant and porosity, pressure drop and mass transfer
The features such as unit high temperature is low, spotting out is high, vapour-liquid contact is abundant, mass-transfer efficiency is high.
VOCs waste gas from incinerator is exported from aeration tower and is passed through in low-temperature plasma device through exhaust piping, low-temperature plasma device
The form of middle reactor can be board-like to board-like or line for pipeline, needle plate type nozzle, low-temperature plasma in the present embodiment
Device includes shell and the spool formula plasma processing apparatus in shell, and the barrel of spool formula plasma processing apparatus connects
Ground, the external plasma high voltage power supply of discharge electrode of axle center setting.
The purification mechanism of low-temperature plasma processing technique is broadly divided into two aspects: first is that in the process for generating plasma
In, moment high energy caused by high-frequency discharge opens the chemical bond of some pernicious gas intramoleculars enough, is allowed to be decomposed into simple substance
Atom or harmless molecule；Second is that including a large amount of active particles in plasma, such as high energy electron, negative ions, excited state particle
With the free radical with strong oxidizing property, these active particles and part pernicious gas molecular collision are combined, and under electric field action, are made
Pernicious gas molecule is in excitation state.It is harmful when the energy that pernicious gas molecule obtains is greater than the combination energy of its molecular bond energy
The chemical bond rupture of gas molecule directly resolves into simple substance atom or obtains innocuous gas molecule by single atomic building.It is low simultaneously
A large amount of OH, HO2, O isoreactivity free radicals and the extremely strong ozone of oxidisability that warm plasma apparatus generates, with pernicious gas
Molecule (such as ethyl acetate, butyl acetate, benzene,toluene,xylene, formaldehyde) chemically reacts, and ultimately generates harmless products
(such as carbon dioxide and water).
The following are several examples of gas molecule oxygenolysis in VOCs exhaust gas:
H2S+·OH→HS+H2O
RCH2CH3+·OH→RCOCH3+H2O
NH3+O2、O2-、O2+→NOx+H2O
VOCs+·OH→CO2+H2O+SO2
Therefore, entire treatment mechanism are as follows:
VOCs+O2、O2-、O2+→SO3+CO2+H2O
H2S+O2、O2-、O2+→SO3+H2O
VOCs waste gas from incinerator, which enters adsorbent equipment through blower from the outlet of low-temperature plasma device, can remove remaining exhaust gas.
Adsorbent equipment is two-stage activated carbon adsorption case, including granular activated carbon adsorption box 15 and carbon fiber adsorption and catalytic combustion case 16.Particle is living
Property charcoal adsorption box filling active carbon particle, the long activated carbon fibre in carbon fiber adsorption and catalytic combustion case day, active carbon particle price ratio
It is relatively inexpensive, but effect is slightly worse, and activated carbon fibre price is relatively high, but adsorption effect is preferable.Therefore exhaust gas is first passed through particle
Activated carbon adsorption case is passed through carbon fiber adsorption and catalytic combustion case again.
Active carbon for adsorbing VOCs organic exhaust gas has the advantage that
A. large specific surface area, effective adsorbance are high.Since the surface area of the xs active carbon of same weight is coaly activated carbon
Nearly ten times of particle, so the weight for the xs active carbon for needing to fill is very small, however adsorption efficiency is but very high, according to locating
The organic gas content of exhaust gas and the difference of other physical characteristics are managed, adsorption efficiency is between 85% to 98%, multi-stage absorption work
Skill can achieve 99.99%, the significantly larger than highest adsorption rate 88% of active carbon particle absorption method, and volume and gross weight
Amount also all very little.
B. Xi Fu ﹑ desorption stroke is short, and speed is fast.Desorption, regeneration energy consumption are low.Xs active carbon is to organic gas adsorbance than general
Several times greater to tens times of logical granular active carbon (GAC), also has good adsorption capacity to inorganic gas, and be able to maintain higher
Adsorption/desorption speed and longer service life.It such as being heated 10-30 minutes, can be desorbed completely with vapor, heat resistance is good,
1000 DEG C of high temperature resistant or more in inert gas, ignition point is up to 450 DEG C or more in air.
C. shape is variable, easy to use.There is column, spheric granules, replacement is convenient, and any harm will not be caused to human body.
D. the special-purpose activated charcoal with property can be produced as needed；Intensity is good, not will cause secondary pollution.
It is carried out finally, VOCs waste gas from incinerator is sent into chimney through exhaust air-introduced machine after adsorbent equipment absorption reaches discharge standard
Qualified discharge is additionally provided with blast cap 16 at the top of chimney.
The variable-frequency motor of air pressure monitoring device and exhaust air-introduced machine carries out linkage, and air pressure is low, indicates that tail gas amount is few, variable-frequency electric
The corresponding frequency reducing of machine reduces power consumption；Air pressure is high, indicates that tail gas amount is more, and the corresponding raising frequency of variable-frequency motor promotes processing capacity.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by described claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (10)
1. a kind of VOCs waste gas from incinerator processing method, which comprises the following steps:
S1, VOCs waste gas from incinerator enter aeration tower after collecting, and the absorbing liquid through spraying in aeration tower removes the acidity in exhaust gas
Gas；
S2, VOCs waste gas from incinerator enter low-temperature plasma device from aeration tower outlet, and VOCs waste gas from incinerator and low-temperature plasma fill
Active particle in setting occurs chemical reaction and removes pernicious gas molecule；Active particle includes high energy electron, excited state particle, smelly
Oxygen and OH, HO2, O free radical；
S3, VOCs waste gas from incinerator enter adsorbent equipment through blower from the outlet of low-temperature plasma device and remove organic exhaust gas；
S4, VOCs waste gas from incinerator enter tapping equipment discharge from the outlet of adsorbent equipment.
2. a kind of device for realizing VOCs waste gas from incinerator processing method described in claim 1, which is characterized in that including gas washing mould
Block, reaction module and adsorption module；The gas washing module includes that aeration tower and the lye set on the bottom of the aeration tower store
Device, the reaction module include low-temperature plasma device, and the adsorption module includes adsorbent equipment and exhaust air-introduced machine.
3. the apparatus of claim 2, which is characterized in that the aeration tower is packed tower, is provided with two-stage spraying layer,
Every grade of spraying layer includes spray head, packing layer and water distributor.
4. device according to claim 3, which is characterized in that the filler in described filler layer is polyhedron empty ball, Bauer
At least one of ring, Raschig ring.
5. device according to claim 3, which is characterized in that the absorbing liquid of the spray head spray is that sodium hydroxide is molten
Liquid.
6. the apparatus of claim 2, which is characterized in that the low-temperature plasma device includes shell and is set to described
Spool formula plasma processing apparatus in shell；The barrel of the spool formula plasma processing apparatus is grounded, and axle center setting is put
The external plasma high voltage power supply of electrode.
7. the apparatus of claim 2, which is characterized in that the inorganic salts being precipitated in the lye storage device are through solid-liquid
Separation equipment separation transports, and solution enters the aeration tower circulated sprinkling and absorbs exhaust gas.
8. the apparatus of claim 2, which is characterized in that the bottom of the aeration tower is equipped with pH monitoring device and adds
Liquid device, the liquid-adding device can be automatically replenished absorbing liquid to the aeration tower.
9. the apparatus of claim 2, which is characterized in that further include for conveying the VOCs waste gas from incinerator after collecting
Air inlet, the air inlet are equipped with air pressure monitoring device, the variable-frequency motor of the air pressure monitoring device and the exhaust air-introduced machine
Linkage.
10. the apparatus of claim 2, which is characterized in that the adsorbent equipment include granular activated carbon adsorption box and
Carbon fiber adsorption and catalytic combustion case, exhaust gas are first passed through the granular activated carbon adsorption box and are passed through the carbon fiber adsorption and catalytic combustion case progress again
Absorption.
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| CN201811292986.9A CN109351138A (en) | 2018-11-01 | 2018-11-01 | A kind of VOCs waste gas from incinerator processing method and processing device |
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| CN201811292986.9A CN109351138A (en) | 2018-11-01 | 2018-11-01 | A kind of VOCs waste gas from incinerator processing method and processing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121594A (en) * | 2020-09-28 | 2020-12-25 | 山东彬伟装饰材料有限公司 | VOCS's device is handled through two-stage active carbon case |
| CN113181746A (en) * | 2021-06-03 | 2021-07-30 | 中蓝环境科技有限公司 | Air odor treatment method |
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| CN102553409A (en) * | 2012-03-06 | 2012-07-11 | 山东派力迪环保工程有限公司 | Device for treating organic smelly waste gas by utilizing coupled dielectric barrier discharge plasma |
| CN203853005U (en) * | 2013-12-03 | 2014-10-01 | 河北银发华鼎环保科技有限公司 | VOCs (Volatile Organic Compounds) waste gas purification device |
| CN105983291A (en) * | 2016-06-14 | 2016-10-05 | 江苏赛欧环保设备有限公司 | Waste gas treatment system of chemical sewage station |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553409A (en) * | 2012-03-06 | 2012-07-11 | 山东派力迪环保工程有限公司 | Device for treating organic smelly waste gas by utilizing coupled dielectric barrier discharge plasma |
| CN203853005U (en) * | 2013-12-03 | 2014-10-01 | 河北银发华鼎环保科技有限公司 | VOCs (Volatile Organic Compounds) waste gas purification device |
| CN105983291A (en) * | 2016-06-14 | 2016-10-05 | 江苏赛欧环保设备有限公司 | Waste gas treatment system of chemical sewage station |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121594A (en) * | 2020-09-28 | 2020-12-25 | 山东彬伟装饰材料有限公司 | VOCS's device is handled through two-stage active carbon case |
| CN113181746A (en) * | 2021-06-03 | 2021-07-30 | 中蓝环境科技有限公司 | Air odor treatment method |
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Application publication date: 20190219 |