CN108889066A - A kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution - Google Patents

A kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution Download PDF

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Publication number
CN108889066A
CN108889066A CN201811119168.9A CN201811119168A CN108889066A CN 108889066 A CN108889066 A CN 108889066A CN 201811119168 A CN201811119168 A CN 201811119168A CN 108889066 A CN108889066 A CN 108889066A
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convex rod
magnetic solution
concave convex
field magnetic
concave
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张�诚
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
    • 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
    • B01D53/04—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 with stationary adsorbents
    • 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
    • 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
    • B01D2253/106—Silica or silicates
    • B01D2253/11—Clays
    • 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
    • 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
    • B01D2259/814—Magnetic fields

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The present invention discloses a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution, the blower including processor and inside processing；The processor one side is equipped with air outlet and at least one side is equipped with air intake surface, and the air intake surface is equipped with concave convex rod molecular sieve, modified activated carbon and superparamagnetic field magnetic solution plate from outside to inside；The concave convex rod molecular sieve is equipped with three-decker, successively includes front layer fine-structure mesh, middle layer honeycomb circulation layer and rear layer fine-structure mesh, is filled with concave-convex rod particle in the honeycomb circulation layer, and have front layer fine-structure mesh and rear layer fine-structure mesh package.Exhaust processor of the invention combines the filtering of the magnetic solution of the adsorption filtration of concave convex rod adsorption plate and the adsorption plate of modified activated carbon and superparamagnetic field magnetic solution plate, waste gas purification rate is higher, concave convex rod molecular sieve is using concave convex rod as adsorbent and red pyroxene as characterization agent, it can make the hydrophobically modified technology of concave convex rod molecular sieve more easily and effect is more preferable, its selective adsorption capacity to organic compound can be improved.

Description

A kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution
Technical field
It is especially a kind of to have using concave convex rod absorption and superparamagnetic field magnetic solution the present invention relates to waste gas purification technical field Machine exhaust processor.
Background technique
Existing VOCs treatment technology：
1. liquid absorption technology：The principle of this Treatment process is by two kinds of shapes of Physical Absorption method and chemical absorption method Formula realizes merging for harmful components and the absorbent in organic exhaust gas, reprocesses waste water, realizes purification treatment purpose.Purifying rate< 30%, and have very secondary pollution again.
2. adsorption technology：Organic exhaust gas is adsorbed using adsorbent, suitable for handling a small amount of organic exhaust gas of low concentration.Purification Efficiency it is lower (<45%), regeneration desorption is more difficult (inflammable), needs to constantly change (3-5 days/time), maintenance cost is higher, can inhale " spectrum " of attached organic exhaust gas is narrow, generates solid waste.Such as：Various active carbons etc..
3. heat damage technology：Also referred to as combustion method is divided into direct combustion method and catalytic oxidation combustion method.The former directly fires Burning method is directly to burn the organic matter in organic exhaust gas, most under the elevated temperature vessel by temperature between 650 DEG C~850 DEG C The innocuous substance for generating other nonstaining properties of carbon dioxide, water etc. afterwards can if the content of flammable organic exhaust gas is lower To guarantee incendivity temperature and oxygen content size in combustion process burning in the present incinerator of exhaust gas；
Production by Catalytic Combustion Process, it is under the effect of the catalyst, to accelerate organic chemical reactions speed, its improvement is very It is good, it is currently your gold using most wide catalyst in the lower catalysis burning of temperature substantially between 90%~99% Belong to and base metal two types.
3.1 flame combustion methods:Organic exhaust gas is sufficiently mixed with fuel gas at high temperature, realizes completely burned.Suitable for place The imflammable gas of high concentration, small tolerance is managed, purification efficiency is high, and organic exhaust gas is decomposed by exhaustive oxidation, disadvantage：Equipment is perishable Erosion, processing cost is high, easily formation secondary pollution；
3.2 Production by Catalytic Combustion Process:Under the effect of the catalyst, make the hydrocarbon in organic exhaust gas in the lower item of temperature Rapid oxidation Cheng Shui and carbon dioxide, achieve the purpose that improvement under part.Disadvantage：Catalyst is easily poisoned, input cost and maintenance at This height；
4. high energy ultraviolet photodissociation technology is to generate the light quantity of different-energy by the ultraviolet light excitation light source of specific wavelength Son；Litter is verified the strong absorption of the light quantum, largely take can make under the bombardment of light quantum exhaust gas substance molecular dissociation and Excitation；Oxygen and moisture and additional ozone in air can produce a large amount of nascent state under (decomposition) effect of the light quantum Hydrogen, activity (free) oxygen and hydroxyl oxygen isoreactivity group；Because the taken positron-electron imbalance of free oxygen is so need to be with oxygen molecule knot It closes, and then generates ozone, the organic matter after ozone decomposes ultraviolet beam irradiation has extremely strong oxidation；Portion Substance can also be reacted with active group, and final Degradation and Transformation is the innocuous substances such as low molecular compound CO2 and H2O.
5. bioanalysis：Using microorganism life process the gaseous pollutant decomposition and inversion in exhaust gas at less or even without Evil substance.There are various microorganisms in nature, nearly all inorganic and organic pollutant can be converted.Biology Processing does not need regeneration and other high-level processes, compared with other methods of purification, have equipment is simple, low energy consumption, safety can The advantages that leaning on, be without secondary pollution, but polluter cannot be recycled.
6. lower temperature plasma technology：It is generated during dielectric barrier discharge, inside plasma living rich in high chemistry The particle of property, such as electronics, ion, free radical and excited state molecule.Polluter in exhaust gas and these with higher-energy Active group react, be eventually converted into the substances such as CO2 and H2O, thus achieve the purpose that purify exhaust gas.The scope of application Extensively, purification efficiency is high, is particularly suitable for the reluctant multi-component stink gas of other methods, such as chemical industry, medicine industry.Electricity Sub- energy is high, almost can be with all foul gas molecular actions；Operating cost is low；Reaction is fast, and equipment starting stops very Rapidly, with with opening.Disadvantage：One-time investment is compared with high, security risk is big.
7. photochemical catalytic oxidation introduction:Photooxidation catalytic treatment technology is to be urged using extraordinary ultra-violet bands (C-band) in special type Under the action of changing oxidant, by emission molecule is broken and a kind of further redox specially treated mode.Emission molecule is first It is crushed organic molecule by special wave band high energy ultraviolet light wave, interrupts its strand；Meanwhile by decompose air in oxygen and Water obtains high-concentrated ozone, and ozone further absorbs energy, forms the higher free hydroxyl of oxidation susceptibility, oxidation gaseous effluent molecule. A variety of composite inert catalyst are configured according to different exhaust gas constituents simultaneously, greatly improve the speed and efficiency of exhaust-gas treatment, from And achieve the purpose that exhaust gas is carried out to purify
8. ultraviolet light exhaust-gas treatment:Firstly, product irradiates foul gas using special high energy high ozone ultraviolet beam, Cracked gas such as ammonia, trimethylamine, hydrogen sulfide, first sulphur, methyl mercaptan, methyl sulfide, methyl disulfide, carbon disulfide and carbon disulfide benzene second Alkene, hydrogen sulfide, hydrogen sulfide, benzene, toluene, dimethylbenzene molecular chain structure make organic or inorganic high-molecular compound strand, high energy Ultraviolet light irradiation, is degraded into low molecular weight compound such as CO2, H2O.It is decomposed using high energy high ozone ultraviolet light ultraviolet beam empty Oxygen molecule in gas generates free oxygen, i.e., the imbalance and oxygen of the active oxygen and negative electron that are carried by the free oxygen that negative electrical charge carries Molecule needs to combine, and then generates ozone.UV+O2 → O-+O* (active oxygen) O+O2 → O3 (ozone), it is known that ozone has strong The smell of strong oxidation operation, gas and other penetrating odors is immediately affected by removal.Using high energy UV in molecular link It is middle that gas bacterium sterilizes, it destroys bacterial nucleic acid (DNA), then by ozone oxidation, complete deodorization simultaneously kills bacterium.
It is high-efficient, in addition to foul smell：Volatile organic compounds (VOC), inorganic, hydrogen sulfide, ammonia, mercaptan etc. can be effectively removed Major pollutants, and various smells, odor removal efficient 99% are much higher than the national emission standard for odor pollutants promulgated in 1993 (GB14554-93).Without adding any material：Exhaust pipe appropriate and exhaust power need to be only set, and the smell of gas is by setting It is standby to carry out deodorization decomposing, purifying, chemical reaction is participated in without adding any substance.Adapt to high concentration, atm number, different effluviums Body deodorization scavenging material can daily 24 continuous throughout the twenty-four hour24, stable and reliable operation.But fatal disadvantage is that treating capacity is small, needs Constant temperature, the amount of exhaust gas input and concentration want constant, automatic inactivation, maintenance cost height easily occur.
And in the discharge of existing China's organic exhaust gas, a large amount of other pollutions are mixed, such as：Dirt, paint drop, water, biology Exhaust gas etc., in preceding pretreatment, the technology of the exhaust-gas treatment of the prior art has：Liquid absorption technology, heat damage technology, physics mistake Filter technology, electrostatic precipitator technology etc., wherein physical filtering technology and electrostatic precipitator technology are the mainstream skill of existing exhaust-gas treatment Art.
But the granular size of the physical filtering technical filter of the prior art also stop be desirably also in PM2.5 rank, it is right In PM2.5 particle below, especially partial size in 100nm nonpolar little particulate below, still " helpless ".And in order to Reach good filter effect, need that multistage filtering is arranged, leads to physical filtering apparatus structure complexity, the installation fiber crops of the prior art It is tired；And service life is shorter, and maintenance cost is higher, needs to re-replace.
And electrostatic precipitator technology can not also handle PM2.5 particle below, especially partial size in 100nm nonpolarity below Little particulate needs to access the high-pressure electrostatic of up to upper kilovolt, power consumption is excessive, Er Qiehui to reach good filter effect High-pressure electrostatic is generated, the life security of people is jeopardized.
It is below quickly to smash pm2.5 using high-intensitive superparamagnetic field for superparamagnetic field nano magnetic solution technology, this technology The particle of various exhaust gas allows the partial size of its particle in 100nm hereinafter, when particle is below nanoscale, particle peripheral electron, no It is circular motion but forms spasmodic motion (movement of on-circular formula), generates superparamagnetism, under the action of externally-applied magnetic field, institute Some particles close Key by the change that set magnetic field line of force direction strikes off small molecule, are oxidized to C0 after " magnetic solution "2、H20、02、N2Etc. inorganic Small molecule can thoroughly handle part PM2.5 particle, PM1.0 particle and partial size in 100nm nonpolar little particulate below.
Summary of the invention
In order to overcome the disadvantages mentioned above of the prior art, higher, power consumption that the object of the present invention is to provide a kind of waste gas purification rates Amount is less, the higher VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution of security performance.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution, wherein：Including processor and set Blower inside processing；The processor one side is equipped with air outlet and at least one side is equipped with air intake surface, the air inlet Face is equipped with concave convex rod molecular sieve, modified activated carbon and superparamagnetic field magnetic solution plate from outside to inside；
The concave convex rod molecular sieve is equipped with three-decker, successively includes front layer fine-structure mesh, the double honeycomb circulation layers in middle layer and rear layer Fine-structure mesh, the interstitial spaces between the double honeycombs circulation layers are 4mm-6mm, and the thickness 10mm to 2mm of each honeycomb circulation layer is described It is filled with concave-convex rod particle filled with concave-convex rod particle or in which one layer in double layer cell circulation layer, another layer is filled with modification Activated carbon and adsorbent, and wrapped up by front layer fine-structure mesh and rear layer fine-structure mesh；
The superparamagnetic field magnetic solution plate, which is connected by outer framework with magnetic solution Intranet, to be formed, and is coated with nanometer on the net in the magnetic solution Grade metal coating.
As a further improvement of the present invention：The superparamagnetic field magnetic solution plate is connected with electrostatic generator, the electrostatic hair Raw device includes at least one：With 18kV-25kV electrostatic pressure output strong electrostatic generator or have 12V-36V electrostatic Press the weak electrostatic generator of output.
As a further improvement of the present invention：The magnetic solution Intranet is more made of tweezer, copper alloy or basalt materials Hole reticular structure or the foaming irregular empty pocket structure of sample.
As a further improvement of the present invention：The nano metal coating is by nanosized copper particle or nanometer-level silver particle It sprays.
As a further improvement of the present invention：The nano metal coating with a thickness of 2-10 μm, the nanoparticle or The granularity of nano silver particles is 2-4nm size.
Compared with prior art, the beneficial effects of the invention are as follows：
Exhaust processor of the invention filters the magnetic solution of the adsorption filtration of concave convex rod adsorption plate and superparamagnetic field magnetic solution plate It combines, waste gas purification rate is higher, and waste gas purification rate is up to 99.99% or more.
Concave convex rod molecular sieve is used as characterization agent as adsorbent and red pyroxene using concave convex rod, on the one hand can make concave convex rod The hydrophobically modified technology of molecular sieve is easier and effect is more preferable, its selective adsorption capacity to organic compound can be improved； On the other hand, relative to concave convex rod, the price of red pyroxene is cheaper, can save cost of material.
Processor of the invention uses superparamagnetic field magnetic solution technology, mainly for PM2.5 particle below, especially partial size Pm2.5 various exhaust gas below are quickly smashed using high-intensitive superparamagnetic field in 100nm nonpolar little particulate below Particle allows the partial size of its particle in 100nm hereinafter, when particle is below nanoscale, and the chemical combination for cracking organic molecule is built, and generates C02、H20、02、N2Equal inorganic molecules；Substantially it is analogous to composition of air.
Processor of the invention uses superparamagnetic field magnetic solution technology, relative to existing physical filtering technology, without in short-term Between replace, maintenance cost is lower, and theoretically service life can reach 20 years or more.In addition to this, the also simple, installation with structure Convenient advantage is suitble to large-scale promotion to use.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of air intake surface.
Fig. 3 is the structural schematic diagram of concave convex rod molecular sieve.
Specific embodiment
Now in conjunction with Detailed description of the invention, the present invention is further described with embodiment：
With reference to Fig. 1-3, a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution, including processor 1 and set on processing inside blower；1 one side of processor is equipped with air outlet 11 and at least one side is equipped with air intake surface 2, The air intake surface is equipped with concave convex rod molecular sieve 21, modified activated carbon 22 and superparamagnetic field magnetic solution plate 23 from outside to inside；
The concave convex rod molecular sieve is equipped with three-decker, successively includes front layer fine-structure mesh 211, middle layer honeycomb circulation 212 and of layer Layer fine-structure mesh 213 afterwards is filled with concave-convex rod particle in honeycomb circulation layer, and is wrapped up by front layer fine-structure mesh and rear layer fine-structure mesh；
The concave convex rod molecule particles be by the way that natural concave convex rod is crushed, be mixed with beating in blender with pure water and Centrifuge separation carries out decontamination, and homogenate, is added red pyroxene and graphene is characterized, and is ground using formula nanometer water grinder is stood False reunion is formed at powder at 40-80nm nanometer particle, then with high-temperature spray crushed machine, 3X2X2mm is made in dual-purpose pelletizer Particle.The specific surface area of the concave convex rod molecule particles reaches 2000-3000m2/g。
The superparamagnetic field magnetic solution plate is connected with magnetic solution Intranet by the outer framework to insulate and is formed, and is sprayed on the net in the magnetic solution There is nano level metal coating.
The superparamagnetic field magnetic solution plate is connected with electrostatic generator, and the electrostatic generator includes at least one：Band The strong electrostatic generator for thering is 18kV-25kV electrostatic pressure to export or the weak electrostatic generator with the output of 12V-36V electrostatic pressure.
The magnetic solution Intranet is the porous network structure made of the alloys such as tweezer, copper, silver or basalt materials.
The nano metal coating is sprayed by nanosized copper particle or nanometer-level silver particle.
The nano metal coating with a thickness of 2-10 μm, the sizes of the nanoparticle or nano silver particles is 2-4nm.
The preparation method of the superparamagnetic field magnetic solution plate：(1) 20-22nm scale is produced by means of nano silver stamped method Nano silver lattice；(2) graphene of partial size 2nm copper magnetic powder and 1nm is poured into nano silver lattice using fluid jet, obtains nanometer Copper compound material；(3) Nanometer Copper compound material is sprayed on to the surface of magnetic solution Intranet, obtains the magnetic solution for being coated with nanometer copper coating Intranet；(4) the magnetic solution Intranet for being coated with nanometer copper coating is mounted in outer framework to get superparamagnetic field magnetic solution plate.
The principle of the present invention：Under the driving of blower, exhaust gas enters inside processor from air intake surface, successively passes through concave convex rod Molecular sieve adsorption filtration,：Nanoscale concave convex rod molecular sieve is such as most absolutely for obstructing, adsorbing the biggish particle of its in air PM10 and part PM2.5 particle make it handle load and reduce, be more advantageous to part mainly for the protection of superparamagnetic field magnetic solution plate PM2.5 particle and PM1.0 particle (especially partial size is in 100nm nonpolar little particulate below) are thoroughly handled.
The magnetic solution of superparamagnetic field magnetic solution plate filters：The electrostatic electricity of 18kV-25kV or 12V-36V is provided by electrostatic generator Pressure, nanosized copper particle coating generate superparamagnetic field after accessing electrostatic, using high-intensitive superparamagnetic field, quickly smash pm2.5 The particle of various exhaust gas below allows the partial size of its particle, hereinafter, when particle is below nanoscale, to crack organic in 100nm The chemical combination of molecule is built, and C0 is generated2、H20、02、N2Equal inorganic molecules.
Organic exhaust gas is after the magnetic solution of the absorption of concave convex rod molecular sieve and modified activated carbon and superparamagnetic field, by air draft Mouth discharge, while superparamagnetic field cracks the chemical bond for the various types organic exhaust gas that active carbon and concave convex rod adsorb, cracking has The chemical combination of machine molecule is built, and the inorganic molecules such as C02, H20,02, N2, hydrogen are generated；Substantially it is analogous to composition of air, is discharged, no Generate secondary pollution.
In conclusion after those skilled in the art read file of the present invention, according to the technique and scheme of the present invention with Technical concept is not necessarily to creative mental labour and makes other various corresponding conversion schemes, belongs to the model that the present invention is protected It encloses.

Claims (5)

1. a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution, it is characterised in that：Including processor And the blower inside processing；The processor one side is equipped with air outlet and at least one side is equipped with air intake surface, described Air intake surface is equipped with concave convex rod molecular sieve, modified activated carbon and superparamagnetic field magnetic solution plate from outside to inside；
The concave convex rod molecular sieve is equipped with three-decker, successively includes front layer fine-structure mesh, the double honeycombs circulation layers in middle layer and rear layer fine-structure mesh, Interstitial spaces between double honeycomb circulation layers are 4mm-6mm, the thickness 10mm to 2mm of each honeycomb circulation layer, the bilayer It is filled with concave-convex rod particle filled with concave-convex rod particle or in which one layer in honeycomb circulation layer, another layer is filled with modified activity Carbon and adsorbent, and wrapped up by front layer fine-structure mesh and rear layer fine-structure mesh；
The superparamagnetic field magnetic solution plate, which is connected by outer framework with magnetic solution Intranet, to be formed, and is coated with nanometer grade gold on the net in the magnetic solution Belong to coating.
2. a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution according to claim 1, It is characterized in that：The superparamagnetic field magnetic solution plate is connected with electrostatic generator, and the electrostatic generator includes at least one：Band Strong electrostatic generator, the weak electrostatic generator with the output of 12V-36V electrostatic pressure for thering is 18kV-25kV electrostatic pressure to export.
3. a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution according to claim 1, It is characterized in that：The magnetic solution Intranet is the porous network structure made of peptide alloy or basalt materials.
4. a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution stated according to claim 1, special Sign is：The nano metal coating is sprayed by nanosized copper particle or nanometer-level silver particle.
5. a kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution according to claim 4, feature It is：The nano metal coating with a thickness of 1-10 μm, the sizes of the nanoparticle or nano silver particles is 2-4nm.
CN201811119168.9A 2018-09-25 2018-09-25 A kind of VOCs treatment device using concave convex rod absorption and superparamagnetic field magnetic solution Pending CN108889066A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112275039A (en) * 2020-10-16 2021-01-29 安徽职业技术学院 Purifying filter element and purifier comprising same
CN114225627A (en) * 2021-12-08 2022-03-25 上海绿强新材料有限公司 Combined molecular sieve adsorbent for concentrating and purifying VOCs (volatile organic compounds), method and device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112275039A (en) * 2020-10-16 2021-01-29 安徽职业技术学院 Purifying filter element and purifier comprising same
CN114225627A (en) * 2021-12-08 2022-03-25 上海绿强新材料有限公司 Combined molecular sieve adsorbent for concentrating and purifying VOCs (volatile organic compounds), method and device

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