CN113351015A - Volatile organic compound purification device and purification method - Google Patents

Volatile organic compound purification device and purification method Download PDF

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Publication number
CN113351015A
CN113351015A CN202110647394.XA CN202110647394A CN113351015A CN 113351015 A CN113351015 A CN 113351015A CN 202110647394 A CN202110647394 A CN 202110647394A CN 113351015 A CN113351015 A CN 113351015A
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tower
volatile organic
spray
phase oxidation
liquid
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张云鹏
张欢欢
杨海健
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Henan Bolian Huilv Technology Group Co ltd
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Henan Bolian Huilv Technology Group Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • 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
    • B01D47/06—Spray cleaning
    • 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
    • B01D53/007—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 irradiation
    • 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
    • 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
    • B01D53/14—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 absorption
    • B01D53/1487—Removing organic compounds
    • 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
    • B01D53/14—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 absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • 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
    • B01D53/14—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 absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B01D53/185—Liquid distributors
    • 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
    • B01D53/78—Liquid phase processes with gas-liquid contact
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • 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
    • B01D2253/104—Alumina
    • 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
    • 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
    • B01D2253/108—Zeolites
    • 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
    • B01D2253/20—Organic adsorbents
    • B01D2253/202—Polymeric adsorbents
    • 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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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2255/20715—Zirconium
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20792—Zinc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2255/00—Catalysts
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    • B01D2255/209—Other metals
    • B01D2255/2094—Tin
    • 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
    • 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
    • B01D2259/804—UV light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a volatile organic compound purification device and a volatile organic compound purification method, wherein the volatile organic compound purification device comprises a spray chamber, an absorption tower, a liquid-phase oxidation tower and a centrifugal fan, wherein the spray chamber is connected to the absorption tower, the absorption tower is connected to the centrifugal fan, and the centrifugal fan is connected to the liquid-phase oxidation tower; removing floating dust and particulate matters from the waste gas containing the volatile organic compounds by a spray chamber; waste gas from an outlet of the spray chamber enters from the bottom of the absorption tower, and passes through filler gaps of the first filler layer and the second filler layer in sequence to flow upwards in a countercurrent mode, and spray absorption liquid descends from the spray tower along the filler surfaces of the first filler layer and the second filler layer to absorb volatile organic compounds attached to the filler surfaces; the waste gas enters a liquid phase oxidation tower, and volatile organic compounds are adsorbed by the filled dispersed phase active particles and then are discharged from an outlet of the liquid phase oxidation tower; in general, the equipment provided by the invention is reliable in operation, and volatile organic compounds in waste gas can be effectively removed by adopting multi-stage purification combining a spray chamber, an absorption tower and a liquid phase oxidation tower.

Description

Volatile organic compound purification device and purification method
Technical Field
The invention belongs to the technical field of air pollution treatment, and particularly relates to a volatile organic compound purification device and a volatile organic compound purification method.
Background
Volatile Organic Compounds (VOCs) are important precursors of regional atmospheric composite pollution in China at present, and are subjected to photochemical reaction with nitrogen oxides, sulfur oxides and the like under the illumination condition to generate ozone, secondary Organic aerosol, acidic substances and the like; in addition, VOCs in the air can directly enter human bodies through respiratory tracts and skins, and harm the health of human bodies. VOCs have wide sources, and main pollution sources comprise industrial sources, road moving sources and living sources. The industrial source mainly comprises the production industries of VOCs-containing raw materials such as petroleum refining, petrochemical industry, coal processing and conversion and the like, the storage, transportation and sale processes of oils (fuel oil, solvent and the like), the production industries of coating, printing ink, adhesive, pesticide and the like which take VOCs as raw materials, and the use processes of VOCs-containing products such as coating, printing, bonding, demolding, industrial cleaning and the like; the road moving source mainly comprises motor vehicle tail gas emission; the living sources comprise architectural decoration, catering oil smoke and the like. In recent years, researches show that the industrial coating, kitchen oil smoke and the like are widely distributed, and the contribution to environmental pollution is not negligible.
For VOCs control, the method mainly comprises front-end improvement, process control and tail-end treatment. The tail end treatment means that the last control is carried out at the tail gas end in the process, the method is also the key point for controlling VOCs at present, and the VOCs can be recycled or destroyed by adopting different VOCs control technologies, so that the VOCs are discharged after reaching the standard. At present, the main VOCs tail end treatment technologies comprise an absorption method, an oxidation method, an adsorption method, a biological method, a plasma method and the like, wherein the combustion oxidation method and the adsorption method are two most widely applied waste gas treatment technologies. Currently, major problems in the remediation of VOCs include: the technical system and the solution are incomplete, the standard system is incomplete, the basic theory research is not deep, the technical cost performance is not high, the effective operation of equipment and facilities is not sufficient, and the like.
Disclosure of Invention
In view of the problems in the background art, an object of the present invention is to provide a volatile organic compound purification apparatus and a purification method, which can efficiently remove volatile organic compounds in exhaust gas and have a very high use value.
The purpose of the invention is realized as follows: a volatile organic compound purification device comprises a spray chamber, an absorption tower, a liquid phase oxidation tower and a centrifugal fan, wherein an outlet of the spray chamber is connected to an inlet of the absorption tower through a pipeline, an outlet of the absorption tower is connected to an inlet of the centrifugal fan through a pipeline, and an outlet of the centrifugal fan is connected to an inlet of the liquid phase oxidation tower through a pipeline;
a spray pipe is arranged in the spray chamber and connected to a water pump, the water pump is arranged at the bottom of a spray water tank, and the spray water tank is arranged outside the spray chamber;
the bottom of the absorption tower is provided with a spray liquid storage tank, the top of the absorption tower is provided with a demister, a first packing layer and a second packing layer are arranged between the spray liquid storage tank at the bottom and the demister inside of the absorption tower, liquid distributors are respectively arranged above the first packing layer and the second packing layer, a circulating water pump is arranged outside the absorption tower, spray heads are arranged above the liquid distributors, the spray heads are connected to the circulating water pump through spray pipes, water inlets of the circulating water pump are connected to the spray liquid storage tank, and flowmeters are installed on the spray pipes;
active particles are filled in the liquid phase oxidation tower, and an ultraviolet lamp is installed in the liquid phase oxidation tower.
The filler layer is composed of active carbon, mesoporous materials, hydrophobic silica gel and macroporous adsorption resin.
More than 95% of the active particles screened in the liquid phase oxidation tower have the particle size within the range of 0.3 mm-2 mm.
The active particles are composed of a carrier material and a catalyst, wherein the carrier material comprises active carbon, alumina, rare earth, zeolite, active carbon, silica gel and diatomite, and the catalyst comprises titanium dioxide, zinc oxide, tin oxide, zirconium dioxide and cadmium sulfide.
The light source power of the ultraviolet lamp is 0-10000W and can be continuously adjusted.
A purification method of a volatile organic compound purification device comprises the following steps:
firstly, removing floating dust and particulate matters from waste gas containing volatile organic compounds through a spray chamber;
secondly, the waste gas discharged from the outlet of the spray chamber enters from the bottom of the absorption tower and passes through the filler gaps of the first filler layer and the second filler layer in sequence to flow upwards in a countercurrent manner; meanwhile, spraying absorption liquid is pumped out from the spraying liquid storage tank by a circulating water pump, enters the tower from the upper part of the spraying tower through a distributor, descends along the surfaces of the fillers of the first filler layer and the second filler layer, and absorbs volatile organic compounds attached to the surfaces of the fillers;
and thirdly, the waste gas enters a liquid phase oxidation tower, volatile organic compounds are adsorbed by dispersed phase active particles filled in the liquid phase oxidation tower and are oxidized into CO2 and H2O by active oxidation substances in the active particles, and then the waste gas is discharged from an outlet of the liquid phase oxidation tower.
The absolute pressure of the gas in the absorption tower is set to be 50-200 kPa.
The flow of the spraying absorption liquid is 0-1000 m3And h, setting the reaction time of the volatile organic compound-containing waste gas entering the absorption tower and the spraying absorption liquid to be 10-30 min.
The flow of the waste gas containing volatile organic compounds entering the liquid phase oxidation tower is 0-40L/min; the waste gas containing volatile organic compounds entering the liquid phase oxidation tower is extracted by a centrifugal fan, and the air volume of the fan is set to be 0-2000 m3/h。
OH, which is generated by adding an oxidizing agent to water.
The invention has the following beneficial effects: firstly, two packing layers of a first packing layer and a second packing layer are arranged in the absorption tower, VOCs waste gas enters from the bottom of the absorption tower, spray liquid enters from the upper part of the absorption tower through the first packing layer and the second packing layer in the absorption tower through a liquid distributor and descends along the surface of the packing, the VOCs waste gas passes through the bottom of the absorption tower and flows upwards in the upstream direction through gaps between the first packing layer and the second packing layer, and the VOCs waste gas is efficiently absorbed by the adsorbent of the packing on the surface of the packing layer. Meanwhile, the two packing layers of the first packing layer and the second packing layer are arranged, so that the adsorption efficiency can be improved.
Secondly, the invention also provides a liquid phase oxidation tower, active particles are filled in the liquid phase oxidation tower, VOCs waste gas after being sprayed and absorbed by the absorption tower enters the liquid phase oxidation tower, VOCs are firstly transferred to a gas-liquid interface and a liquid phase from a gas phase and are further oxidized by active free radicals of the active particles, and the gas after being absorbed and dissolved returns to the liquid phase main body to be desorbed, so that regeneration and cyclic reciprocation are obtained, and finally, the gas-liquid mass transfer effect is enhanced. The VOCs treatment efficiency is mainly controlled by gas-liquid mass transfer, free radical oxidation efficiency and the like. The transmission mechanism is that the dispersed phase active particles with stronger adsorption can enter the mass transfer film layer from the liquid phase. OH is taken as a main active oxidizing substance and has strong oxidizing property, and the OH and organic substances generate chain reaction to oxidize VOCs into CO2And H2And O, finally, reaching the standard through a pipeline and discharging into the atmosphere. The active oxidizing substance in the liquid phase advanced oxidation tower solution, OH, is generated by adding an oxidizing agent to water.
Thirdly, the ultraviolet lamp is arranged in the liquid phase oxidation tower, and ultraviolet rays emitted by the ultraviolet lamp perform photolysis on VOCs waste gas and are finally discharged into the atmosphere through a pipeline after reaching the standard.
And fourthly, the VOCs waste gas passes through a spray chamber in the first step, passes through an absorption tower in the second step and passes through a liquid phase oxidation tower in the third step, and the VOCs in the waste gas are removed through the three steps of high-efficiency purification treatment, and the waste gas can be discharged into the atmosphere after reaching the standard.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the internal structure of the shower chamber.
Fig. 3 is a schematic perspective view of an absorption column.
FIG. 4 is a schematic sectional view of an absorption column.
FIG. 5 is a schematic sectional view of a liquid phase oxidation tower.
In the figure: 1. the device comprises a spray chamber 2, an absorption tower 3, a liquid phase oxidation tower 4, a centrifugal fan 5, a pipeline 6, a spray pipe 7, a water pump 8, a spray water tank 9, a spray liquid storage tank 10, a demister 11, a first packing layer 12, a second packing layer 13, a liquid distributor 14, a circulating water pump 15, a spray head 16, a spray pipeline 17, a flow meter 18, active particles 19 and an ultraviolet lamp.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1-5, a volatile organic compound purification apparatus and purification method includes a spray chamber 1, an absorption tower 2, a liquid phase oxidation tower 3, and a centrifugal fan 4, wherein an outlet of the spray chamber 1 is connected to an inlet of the absorption tower 2 through a pipeline 5, an outlet of the absorption tower 2 is connected to an inlet of the centrifugal fan 4 through a pipeline 5, and an outlet of the centrifugal fan 4 is connected to an inlet of the liquid phase oxidation tower 3 through a pipeline 5;
a spray pipe 6 is arranged in the spray chamber 1, the spray pipe 6 is connected with a water pump 7, the water pump 7 is arranged at the bottom of a spray water tank 8, and the spray water tank 8 is arranged outside the spray chamber 1;
a spray liquid storage tank 9 is arranged at the bottom of the absorption tower 2, a demister 10 is arranged at the top of the absorption tower 2, a first packing layer 11 and a second packing layer 12 are arranged between the spray liquid storage tank 9 at the bottom and the demister 10 inside the absorption tower 2, liquid distributors 13 are respectively arranged above the first packing layer 11 and the second packing layer 12, a circulating water pump 14 is arranged outside the absorption tower 2, spray heads 15 are arranged above the liquid distributors 13, the spray heads 15 are connected to a circulating water pump 14 through a spray pipeline 16, a water inlet of the circulating water pump 14 is connected to the spray liquid storage tank 9, and a flowmeter 17 is arranged on the spray pipeline 16;
active particles 18 are filled in the liquid phase oxidation tower 3, and an ultraviolet lamp 19 is installed in the liquid phase oxidation tower 18.
The first filler layer 11 and the second filler layer 12 are composed of activated carbon, mesoporous materials, hydrophobic silica gel and macroporous adsorption resin.
More than 95% of the active particles screened in the liquid-phase oxidation tower 3 have the particle size within the range of 0.3 mm-2 mm.
The active particles 18 are composed of a carrier material and a catalyst, wherein the carrier material comprises active carbon, aluminum oxide, rare earth, zeolite, active carbon, silica gel and diatomite, and the catalyst comprises titanium dioxide, zinc oxide, tin oxide, zirconium dioxide and cadmium sulfide.
The light source power of the ultraviolet lamp 19 is continuously adjustable within 0-10000W.
A purification method of a volatile organic compound purification device comprises the following steps:
firstly, removing floating dust and particulate matters from waste gas containing volatile organic compounds through a spray chamber;
secondly, the waste gas discharged from the outlet of the spray chamber enters from the bottom of the absorption tower and passes through the filler gaps of the first filler layer and the second filler layer in sequence to flow upwards in a countercurrent manner; meanwhile, spraying absorption liquid is pumped out from the spraying liquid storage tank by a circulating water pump, enters the tower from the upper part of the spraying tower through a distributor, descends along the surfaces of the fillers of the first filler layer and the second filler layer, and absorbs volatile organic compounds attached to the surfaces of the fillers;
and thirdly, the waste gas enters a liquid phase oxidation tower, volatile organic compounds are adsorbed by dispersed phase active particles filled in the liquid phase oxidation tower and are oxidized into CO2 and H2O by active oxidation substances in the active particles, and then the waste gas is discharged from an outlet of the liquid phase oxidation tower.
The absolute pressure of the gas in the absorption column was set to 100 kPa.
The flow rate of the spraying absorption liquid is 500 m3And h, setting the reaction time of the waste gas containing the volatile organic compounds and the spraying absorption liquid entering the absorption tower to be 20 min.
The flow of the waste gas containing volatile organic compounds entering the liquid phase oxidation tower is 20L/min; the waste gas containing volatile organic compounds entering the liquid phase oxidation tower is extracted by a centrifugal fan, and the air volume of the fan is set to be 1000 m3/h。
OH, which is generated by adding an oxidizing agent to water.
When the invention is used: the utility model provides a purifier of volatile organic compounds, includes spray room, absorption tower, liquid phase oxidation tower, centrifugal fan, and the export of spray room passes through pipe connection in the import of absorption tower, and the export of absorption tower passes through pipe connection in centrifugal fan's import, and centrifugal fan's export passes through pipe connection in the import of liquid phase oxidation tower. Firstly, waste gas containing volatile organic compounds passes through a spray chamber to remove floating dust and particulate matters. Secondly, the waste gas discharged from the outlet of the spray chamber enters from the bottom of the absorption tower and passes through the filler gaps of the first filler layer and the second filler layer in sequence to flow upwards in a countercurrent manner; meanwhile, spraying absorption liquid is pumped out from the spraying liquid storage tank by a circulating water pump, enters the tower from the upper part of the spraying tower through a distributor, descends along the surfaces of the fillers of the first filler layer and the second filler layer, and absorbs volatile organic compounds attached to the surfaces of the fillers; the surface of the packing layer is efficiently absorbed by the packed adsorbent, and then the VOCs waste gas is discharged from an outlet of the absorption tower after being demisted by the demister. Thirdly, absorbing VOCs waste gas discharged from an outlet of the absorption tower into the liquid-phase oxidation tower by using a centrifugal fan, enabling the waste gas to enter the liquid-phase oxidation tower, and enabling volatile organic matters to be absorbed by dispersed-phase active particles filled in the liquid-phase oxidation tower and to be oxidized into CO2 and H2O by using active oxidizing substances in the active particles; meanwhile, VOCs waste gas is subjected to photolysis by combining ultraviolet rays emitted by an ultraviolet lamp, and finally discharged to the atmosphere after reaching the standard through a pipeline.
In general, the equipment provided by the invention is reliable in operation, and volatile organic compounds in waste gas can be effectively removed by adopting multi-stage purification combining a spray chamber, an absorption tower and a liquid phase oxidation tower.

Claims (10)

1. The utility model provides a volatile organic compounds purifier, includes spray room, absorption tower, liquid phase oxidation tower, centrifugal fan, the export of spray room passes through the import of pipe connection in the absorption tower, the export of absorption tower passes through the import of pipe connection in centrifugal fan, centrifugal fan's export passes through the import of pipe connection in liquid phase oxidation tower, its characterized in that:
a spray pipe is arranged in the spray chamber and connected to a water pump, the water pump is arranged at the bottom of a spray water tank, and the spray water tank is arranged outside the spray chamber;
the bottom of the absorption tower is provided with a spray liquid storage tank, the top of the absorption tower is provided with a demister, a first packing layer and a second packing layer are arranged between the spray liquid storage tank at the bottom and the demister inside of the absorption tower, liquid distributors are respectively arranged above the first packing layer and the second packing layer, a circulating water pump is arranged outside the absorption tower, spray heads are arranged above the liquid distributors, the spray heads are connected to the circulating water pump through spray pipes, water inlets of the circulating water pump are connected to the spray liquid storage tank, and flowmeters are installed on the spray pipes;
active particles are filled in the liquid phase oxidation tower, and an ultraviolet lamp is installed in the liquid phase oxidation tower.
2. The apparatus of claim 1, wherein: the first packing layer and the second packing layer are composed of active carbon, mesoporous materials, hydrophobic silica gel and macroporous adsorption resin.
3. The apparatus of claim 1, wherein: more than 95% of the active particles screened in the liquid phase oxidation tower have the particle size within the range of 0.3 mm-2 mm.
4. The apparatus of claim 1, wherein: the active particles are composed of a carrier material and a catalyst, wherein the carrier material comprises active carbon, alumina, rare earth, zeolite, active carbon, silica gel and diatomite, and the catalyst comprises titanium dioxide, zinc oxide, tin oxide, zirconium dioxide and cadmium sulfide.
5. The apparatus of claim 1, wherein: the light source power of the ultraviolet lamp is 0-10000W and can be continuously adjusted.
6. A purification method of the volatile organic compound purification apparatus according to claim 1, characterized by comprising the steps of:
firstly, removing floating dust and particulate matters from waste gas containing volatile organic compounds through a spray chamber;
secondly, the waste gas discharged from the outlet of the spray chamber enters from the bottom of the absorption tower and passes through the filler gaps of the first filler layer and the second filler layer in sequence to flow upwards in a countercurrent manner; meanwhile, spraying absorption liquid is pumped out from the spraying liquid storage tank by a circulating water pump, enters the tower from the upper part of the spraying tower through a distributor, descends along the surfaces of the fillers of the first filler layer and the second filler layer, and absorbs volatile organic compounds attached to the surfaces of the fillers;
and thirdly, the waste gas enters a liquid phase oxidation tower, volatile organic compounds are adsorbed by dispersed phase active particles filled in the liquid phase oxidation tower and are oxidized into CO2 and H2O by active oxidation substances in the active particles, and then the waste gas is discharged from an outlet of the liquid phase oxidation tower.
7. The purification method of a volatile organic compound purification apparatus according to claim 6, wherein: the absolute pressure of the gas in the absorption tower is set to be 50-200 kPa.
8. The purification method of a volatile organic compound purification apparatus according to claim 6, wherein: the flow of the spraying absorption liquid is 0-1000 m3And h, setting the reaction time of the volatile organic compound-containing waste gas entering the absorption tower and the spraying absorption liquid to be 10-30 min.
9. The purification method according to claim 6, wherein: the flow of the waste gas containing volatile organic compounds entering the liquid phase oxidation tower is 0-40L/min; the waste gas containing volatile organic compounds entering the liquid phase oxidation tower is extracted by a centrifugal fan, and the air volume of the fan is set to be 0-2000 m3/h。
10. The purification method according to claim 6, wherein: OH, which is generated by adding an oxidizing agent to water.
CN202110647394.XA 2021-06-10 2021-06-10 Volatile organic compound purification device and purification method Withdrawn CN113351015A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114452916A (en) * 2022-01-13 2022-05-10 宁夏天霖新材料科技有限公司 Preparation equipment and method of monochloroethylene carbonate
CN114558438A (en) * 2022-03-24 2022-05-31 重庆众源盛特环保设备制造有限公司 Active dynamic membrane VOCs waste gas treatment system and process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114452916A (en) * 2022-01-13 2022-05-10 宁夏天霖新材料科技有限公司 Preparation equipment and method of monochloroethylene carbonate
CN114558438A (en) * 2022-03-24 2022-05-31 重庆众源盛特环保设备制造有限公司 Active dynamic membrane VOCs waste gas treatment system and process
CN114558438B (en) * 2022-03-24 2024-01-26 重庆众源盛特环保设备制造有限公司 System and process for treating VOCs waste gas by using active dynamic membrane

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