CN111659221A - Industrial VOCs waste gas treatment equipment and method - Google Patents
Industrial VOCs waste gas treatment equipment and method Download PDFInfo
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- CN111659221A CN111659221A CN202010553286.1A CN202010553286A CN111659221A CN 111659221 A CN111659221 A CN 111659221A CN 202010553286 A CN202010553286 A CN 202010553286A CN 111659221 A CN111659221 A CN 111659221A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 19
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 182
- 238000004140 cleaning Methods 0.000 claims description 63
- 238000010612 desalination reaction Methods 0.000 claims description 37
- 238000011033 desalting Methods 0.000 claims description 25
- 238000007254 oxidation reaction Methods 0.000 claims description 23
- 230000003647 oxidation Effects 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 19
- 150000002500 ions Chemical class 0.000 claims description 18
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- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
- B01D51/10—Conditioning the gas to be cleaned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
-
- 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
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- 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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Toxicology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides industrial VOCs waste gas treatment equipment and method, relates to the technical field of waste gas treatment, and solves the technical problem that the existing VOCs waste gas treatment equipment in the prior art is lack of ozone treatment. The device comprises a pretreatment device, a VOCs treatment device and an ozone treatment device, wherein the pretreatment device, the VOCs treatment device and the ozone treatment device are connected through a pipeline, a driving device is arranged on the pipeline, and VOCs waste gas in a production workshop can sequentially pass through the pretreatment device, the VOCs treatment device and the ozone treatment device under the driving of the driving device; the ozone treatment device comprises a far infrared heating bin, and the far infrared heating bin can treat ozone generated by the VOCs treatment device in a far infrared heating mode. The invention is used for preventing a large amount of ozone generated during the treatment of industrial VOCs waste gas from being discharged to the atmosphere.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to equipment and a method for treating industrial VOCs waste gas.
Background
Volatile Organic Compounds (VOCs) are commonly used, most VOCs have uncomfortable special odor and have toxic, irritant, teratogenic and carcinogenic effects, and particularly benzene, toluene, formaldehyde and the like cause great harm to human health.
The applicant has found that the prior art has at least the following technical problems:
a large amount of ozone is generated in the industrial VOCs waste gas treatment process, and the ozone is usually directly discharged at present and is not treated; the invention improves the treatment process of industrial VOCs waste gas, and converts ozone into available pollution-free oxygen, so that the industrial VOCs waste gas is better treated.
Disclosure of Invention
The invention aims to provide industrial VOCs waste gas treatment equipment and a method, which solve the technical problem that the existing VOCs waste gas treatment equipment in the prior art is lack of ozone treatment. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides industrial VOCs waste gas treatment equipment which comprises a pretreatment device, a VOCs treatment device and an ozone treatment device, wherein the pretreatment device, the VOCs treatment device and the ozone treatment device are connected through a pipeline, a driving device is arranged on the pipeline, and VOCs waste gas in a production workshop can sequentially pass through the pretreatment device, the VOCs treatment device and the ozone treatment device under the driving of the driving device; ozone treatment device includes the far infrared storehouse of heating, the far infrared storehouse of heating can be through the mode processing process of far infrared ozone that VOCs processing apparatus produced.
Furthermore, the industrial VOCs waste gas treatment equipment further comprises a third-stage gas desalting device and a secondary air cleaning tower, wherein the third-stage gas desalting device and the secondary air cleaning tower are sequentially arranged on the pipeline from front to back, and the third-stage gas desalting device and the secondary air cleaning tower are arranged between the VOCs treatment device and the ozone treatment device; the three-stage gas desalting device is used for introducing external air to reduce the concentration of waste gas in the three-stage gas desalting device, and the secondary air cleaning tower is used for cooling and filtering waste gas particles and water-soluble substances in gas.
Further, the ozone treatment device also comprises a gas preheating device, the gas preheating device is arranged on the pipeline, and gas can flow to the far infrared warming bin after being subjected to preheating treatment by the gas preheating device.
Further, the heat of the preheating gas in the gas preheating device is the waste heat of an air compressor or the waste heat of a boiler.
Further, the temperature range of the gas preheated by the gas preheating device is 70-100 ℃.
Further, the VOCs treatment device comprises an electrostatic adsorption filter, a photocatalytic oxidation box and an ion filter box; the electrostatic adsorption filter, the photocatalytic oxidation box and the ion filter box are sequentially connected in front and back through the pipeline; the photocatalytic oxidation box realizes the purification of waste gas by utilizing ultraviolet decomposition and ozone oxidation methods;
the pretreatment device comprises a primary gas desalting device, a primary air cleaning tower and a secondary gas desalting device, the primary air cleaning tower and the secondary gas desalting device are sequentially connected from front to back through the pipeline, and airflow discharged by the secondary gas desalting device can flow to the VOCs treatment device; the primary air desalination device and the secondary air desalination device are used for introducing external air to reduce the concentration of internal waste gas, and the primary air cleaning tower is used for cooling and filtering waste gas particles and water-soluble substances in the gas.
Further, the industrial VOCs waste gas treatment equipment also comprises a three-stage air cleaning tower, wherein gas discharged by the ozone treatment device is discharged out of the industrial VOCs waste gas treatment equipment after passing through the three-stage air cleaning tower, and the three-stage air cleaning tower is used for cooling and filtering waste gas particles and water-soluble substances in the gas;
the pipeline is provided with a one-way valve, and the one-way valve is close to the waste gas inlet of the pipeline;
the pipeline is also provided with a fireproof explosion-proof device which is arranged between the primary gas desalting device of the pretreatment device and the primary air cleaning tower.
Further, industry VOCs exhaust-gas treatment equipment still includes controller and sensor, the sensor with the controller is connected, the sensor is a plurality of, the sensor sets up respectively corresponding position is in order to be used for detecting on the pipeline the exhaust concentration condition of corresponding position department.
The method for treating the industrial VOCs waste gas by using the industrial VOCs waste gas treatment equipment is characterized by comprising the following steps of introducing the waste gas treated by the VOCs treatment device into the far infrared heating bin, and treating ozone generated by the VOCs treatment device in a far infrared heating mode to convert the ozone into oxygen.
Further, before the waste gas generated by the VOCs treatment device passes through the far infrared heating bin, the waste gas is treated by a gas desalting device, an air cleaning tower and a gas preheating device in sequence; the gas desalting device is used for introducing external air to reduce the concentration of internal waste gas; the air cleaning tower is used for cooling and filtering waste gas particles and water-soluble substances in the gas; the gas preheating device is used for preheating gas flowing through.
The industrial VOCs waste gas treatment equipment provided by the invention comprises a far infrared heating bin, wherein the far infrared heating bin can treat ozone generated by a VOCs treatment device in a far infrared heating mode, and convert the ozone into oxygen, so that the ozone cannot be directly discharged into the air, and the technical problem that the existing VOCs waste gas treatment equipment in the prior art is lack of treatment on the generated ozone is solved, open flames are not generated by far infrared heating, the heating speed is high, and the permeability and the radiation power are strong.
The preferred technical scheme of the invention can at least produce the following technical effects:
before gas after will filtering lets in far infrared heating storehouse, adopts tertiary gas desalination device to reduce the gaseous concentration of polluting VOCs, adopts secondary air cleaning tower to wash filtered gas, adopts gaseous preheating device to preheat gas for reduce far infrared heating power, and the heat that is used for the preheating gas among the gaseous preheating device comes as air compressor machine waste heat or boiler waste heat, improves waste heat utilization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an industrial VOCs waste gas treatment apparatus according to an embodiment of the present invention.
In the figure 100-production shop; 200-a one-way valve; 300-a gas desalination plant; 310-primary gas desalination plant; 311-primary gas mixture; 312-primary clean filtered gas; 320-a secondary gas desalination plant; 221-secondary gas mixture; 322-secondary clean filtered gas; 330-three-stage gas desalting device; 331-tertiary gas mixture; 332-three-stage clean filtered gas; 400-fire and explosion protection; 500-a fan; 600-an air cleaning tower; 610-a primary air wash column; 611-primary washing column; 612-primary gear pump; 613-primary filter press; 620-secondary air wash column; 621-a secondary wash column; 622 — secondary gear pump; 623-a secondary filter press; 630-three-stage air cleaning tower; 631-a tertiary wash column; 632-three stage gear pump; 633-three-stage filter press; 700-VOCs treatment device; 710-electrostatic adsorption filter; 720-photocatalytic oxidation box; 730-an ion filtration tank; 800-an ozone treatment device; 810-gas preheating device; 811-gas preheating cabinet; 812-a heat exchanger; 820-far infrared heating chamber; 900-sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the present invention provides an industrial VOCs waste gas treatment apparatus, comprising a pretreatment device, a VOCs treatment device 700, and an ozone treatment device 800, wherein the pretreatment device, the VOCs treatment device 700, and the ozone treatment device 800 are connected by a pipeline, the pipeline is provided with a driving device, and the VOCs waste gas in the production workshop 100 (the production workshop 100 may be a workshop with VOCs gas pollution in the production process of petrochemical industry, printing, artificial leather, electronic components, baking varnish, medicine, etc.) can sequentially pass through the pretreatment device, the VOCs treatment device 700, and the ozone treatment device 800; ozone treatment device 800 includes a far infrared heating chamber 820, and far infrared heating chamber 820 can handle the ozone that is produced through VOCs processing apparatus 700 through the mode of far infrared heating. The far infrared warming bin 820 can filter gas to generate a large amount of ozone, so that the ozone cannot be directly discharged into the air; the gas entering the far infrared heating bin 820 is heated to 300 ℃ by using far infrared rays for heating, and because of the instability of ozone, the ozone is converted into oxygen at the temperature of about 280-300 ℃, so that a large amount of ozone is prevented from being directly discharged into the atmosphere. The far infrared ray is adopted for removing the ozone, and the advantages are as follows: the far infrared ray heating does not generate open fire, has high heating speed and stronger penetrability and radiation power.
In addition, as can be seen from fig. 1, a sensor 900 is arranged at the gas outlet of the far infrared warming bin 820, and the sensor 900 may include a VOCs sensor, an oxygen sensor and an ozone sensor, and transmits the detected signal to the PLC controller.
As an optional implementation manner of the embodiment of the present invention, the industrial VOCs waste gas treatment apparatus further includes a third-stage gas desalination device 330 and a secondary air cleaning tower 620, the third-stage gas desalination device 330 and the secondary air cleaning tower 620 are sequentially disposed on the pipeline in front and behind, and the third-stage gas desalination device 330 and the secondary air cleaning tower 620 are disposed between the VOCs treatment device 700 and the ozone treatment device 800; the tertiary gas desalination device 330 is used to introduce external air to reduce the concentration of exhaust gas in the tertiary gas desalination device 330, and the secondary air cleaning tower 620 is used to cool and filter exhaust gas particles and water-soluble substances in the gas. The three-stage gas desalting device 330 is used for mixing some external fresh air, reducing the concentration of polluted VOCs gas, reducing the gas temperature and improving the safety; secondary air cleaning tower 620 washs and filters the gas that produces after VOCs processing apparatus 700 handles, will produce a large amount of ozone, a small amount of oxygen, water smoke and trace VOCs etc. after VOCs processing apparatus 700 handles, and secondary air cleaning tower 620 cools off the gas after filtering, and the high temperature electric arc gas protection that produces to ion filtration reduces smoke and dust in the gas, carries out dehydration to gas.
The air cleaning tower 600 (the primary air cleaning tower 610, the secondary air cleaning tower 620 and the tertiary air cleaning tower 630 are all the air cleaning tower 600) is a centrifugal air cleaning tower, and the cleaning tower is used for removing particulate matters and part of soluble components (such as dust, noise, desulfurization and denitration and formaldehyde) in VOCs waste gas by spraying VOCs gas containing heavy metal substances through high-pressure water (a spray head generates spiral water mist), so that the subsequent treatment efficiency is improved. The cleaning tower uses centrifugal aerial fog dehydration technique, and when the injector head jetted the gaseous in-process of VOCs, can contain a large amount of moisture in the gas, used pneumatic turbine to drive the centrifugal wheel dehydration, with the gaseous dehydration of VOCs handle, the air after the dehydration flows into subordinate's processing behind aqueous vapor separation layer secondary dehydration handle. After the centrifugal air cleaning tower is cleaned, the sediment is pumped to a filter press through a gear pump in a water tank at the lower end of the cleaning tower, the sediment is compressed and filtered into bricks by the filter press, and redundant water is reused for recycling of the cleaning tower.
The gas desalination device 300 (the primary gas desalination device 310, the secondary gas desalination device 320 and the tertiary gas desalination device 330 are all gas desalination devices 300) consists of two parts, namely gas mixture and a clean filter; the gas mixer is a gas device used for mixing VOCs gas and external fresh air, is matched with the VOCs sensor for use, can control the gas mixing proportion, mixes more fresh air when detecting that the concentration of VOCs is high, mixes fresh air when detecting that the concentration of VOCs is low, and controls the PLC controller to complete the control; the cleaning filter is used for filtering air and then providing the filtered air to the gas mixer, so that dust, impurities and the like in the air are reduced from directly entering the mixer, and the pipe is prevented from being plugged.
As shown in fig. 1, a sensor 900 is disposed at the gas outlet of the three-stage gas desalination device 330, the sensor 900 is a VOCs sensor, and the sensor 900 is used in cooperation with the three-stage gas mixture 331 of the three-stage gas desalination device 330. A sensor 900 is arranged at the gas outlet of the secondary air cleaning tower 620, and the sensor 900 is a VOCs sensor and is used for transmitting VOCs gas online detection data to the PLC in real time.
As an optional implementation manner of the embodiment of the invention, the ozone treatment device 800 further comprises a gas preheating device 810, the gas preheating device 810 is arranged on the pipeline, and the gas is preheated by the gas preheating device 810 and can flow to the far infrared warming bin 820 for reducing the far infrared warming power. The gas preheating device 810 comprises a gas preheating box 811 and a heat exchanger 812, gas filtered by the secondary air cleaning tower 620 is converted into ozone and trace VOCs gas, the gas preheating box 811 preheats the gas, and the energy consumption of the rear end when the far infrared heating bin 820 is used for treating the ozone is reduced; the heat generated by the equipment such as the air compressor and the boiler of the enterprise is transferred to the gas preheating tank 811 by using the heat exchanger 812. The temperature range to which the gas preheating device 810 preheats the gas is 70-100 ℃, and the temperature range to which the gas preheating device 810 preheats the gas may be 80-90 ℃. In addition, referring to fig. 1, the exhaust port of the gas preheating device 810 is provided with a sensor 900, which is a VOCs sensor, for transmitting the online detection data of VOCs gas to the PLC controller in real time.
As the inventionExample alternative embodiments, VOCs treatment apparatus 700 includes an electrostatic adsorption filter 710, a photocatalytic oxidation tank 720, and an ion filtration tank 730; the electrostatic adsorption filter 710, the photocatalytic oxidation box 720 and the ion filter box 730 are sequentially connected in front and back through pipelines; the photocatalytic oxidation chamber 720 achieves purification of exhaust gas by using ultraviolet ray decomposition and ozone oxidation. For the electrostatic adsorption filter 710, the electrostatic adsorption system ionizes gas molecules in the air by using a high-voltage direct-current electric field to generate a large amount of electrons and ions, dust-containing gas is electrically separated when passing through a high-voltage electrostatic field, and dust particles and negative ions are combined to be charged negatively and then adsorbed by a metal plate charged positively when passing through a dust removal net, so that the effect of gas filtration is achieved. For the photocatalytic oxidation box 720, the photocatalytic oxidation box 720 can efficiently remove volatile organic compounds, inorganic compounds, hydrogen sulfide, ammonia gas, thiols and other main pollutants by using ultraviolet decomposition and ozone oxidation methods, and meanwhile, the high-efficiency ultraviolet rays can crack the bacterial components in the malodorous gas, destroy the bacterial nucleic acid, and generate low-molecular compounds such as CO through ozone oxidation2、H2O, etc. to achieve the gas filtering effect. For the ion filter box 730, particles rich in extremely high chemical activity, such as electrons, ions, free radicals, excited molecules and the like, are generated in the plasma, and pollutants in the exhaust gas react with the active groups with higher energy and are finally converted into CO2And H2O and the like, thereby achieving the purpose of purifying the waste gas.
In addition, the gas outlet of the electrostatic adsorption filter 710 is provided with a sensor 900, the sensor is a VOCs sensor, VOCs gas online detection data is transmitted to the PLC in real time, the PLC controls the power of the electrostatic adsorption filter 710, when the concentration of the detected VOCs gas is high, the power of the electrostatic adsorption filter 710 is improved, and when the concentration of the VOCs gas is low, the power of the electrostatic adsorption filter 710 is reduced. Photocatalytic oxidation case 720's exhaust port department is provided with sensor 900, and this sensor is the VOCs sensor, with the gaseous on-line measuring data of VOCs real-time transport for the PLC controller, PLC controller control photocatalytic oxidation case 720's power, when detecting VOCs gas concentration height, improve photocatalytic oxidation case 720's power, when VOCs gas concentration is low, reduce photocatalytic oxidation case 720's power. Ion rose box 730's exhaust port department is provided with sensor 900, and this sensor is the VOCs sensor, gives the PLC controller with the gaseous on-line measuring data of VOCs in real time, and the power of PLC controller control ion rose box 730 when detecting VOCs gas concentration height, improves ion rose box 730's power, when VOCs gas concentration is low, reduces ion rose box 730's power.
The pretreatment device comprises a primary gas desalination device 310, a primary air cleaning tower 610 and a secondary gas desalination device 320, wherein the primary gas desalination device 310, the primary air cleaning tower 610 and the secondary gas desalination device 320 are sequentially connected in front and back through pipelines, and airflow discharged by the secondary gas desalination device 320 can flow to the VOCs treatment device 700; the primary air-desalination unit 310 and the secondary air-desalination unit 320 are used to introduce external air to reduce the concentration of internal exhaust gas, and the primary air-cleaning tower 610 is used to cool and filter exhaust gas particles and water-soluble substances in the gas. The primary gas desalination device 310 and the secondary gas desalination device 320 are used for mixing the filtered fresh air with the waste gas in the fresh air, so that the concentration of the polluted VOCs gas is reduced, the gas temperature is reduced, and the safety is improved. The primary air cleaning tower 610 is used to remove particulate matter and partially soluble components (such as dust, noise, desulfurization and denitration, formaldehyde) from the VOCs waste gas, thereby improving the subsequent treatment efficiency.
As an optional implementation manner of the embodiment of the present invention, the industrial VOCs waste gas treatment equipment further includes a three-stage air cleaning tower 630, the gas discharged from the ozone treatment device 800 passes through the three-stage air cleaning tower 630 and then is discharged out of the industrial VOCs waste gas treatment equipment, and the three-stage air cleaning tower 630 is used for cooling and filtering waste gas particles and water-soluble substances in the gas; the far infrared heating bin 820 discharges gas at 280-300 ℃ and then flows to the three-stage air cleaning tower 630, at the moment, the gas comprises a large amount of oxygen, a small amount of ozone and a small amount of VOCs, the high-temperature gas is cooled to 40 ℃ by the three-stage air cleaning tower 630, condensed water generated in the cooling process is collected and reused in the three-stage air cleaning tower 630, water consumption is reduced, and the gas is discharged to the atmosphere after being dehydrated. Referring to fig. 1, a fan 500 is arranged at an exhaust port of the tertiary air cleaning tower 630, a sensor 900 is arranged behind the fan 500, the sensor 900 includes a VOCs sensor, an oxygen sensor and an ozone sensor, and the sensor 900 transmits gas online detection data to the PLC controller in real time.
The pipeline is provided with a one-way valve 200, the one-way valve 200 is close to the waste gas inlet of the pipeline, and the one-way valve 200 is a one-way gas check valve and prevents reverse flow in the gas treatment process flow. The pipeline is also provided with a fire and explosion protection device 400, the fire and explosion protection device 400 is arranged between the primary gas desalination device 310 and the primary air cleaning tower 610 of the pretreatment device, and a fan 500 is arranged behind the fire and explosion protection device 400, see fig. 1.
A method for treating industrial VOCs waste gas by using industrial VOCs waste gas treatment equipment comprises the following steps of introducing the waste gas treated by a VOCs treatment device 700 into a far infrared heating bin 820, and treating ozone generated by the VOCs treatment device 700 in a far infrared heating mode to convert the ozone into oxygen. The far infrared ray heating does not generate open fire, has high heating speed and stronger penetrability and radiation power. The ozone removing process specifically comprises the following steps: before the waste gas generated by the VOCs treatment device 700 (the waste gas generated by passing through the electrostatic adsorption filter 710, the photocatalytic oxidation box 720 and the ion filter box 730 in sequence) passes through the far infrared heating bin 820, the waste gas is treated by adopting the gas desalination device 300, the air cleaning tower 600 and the gas preheating device 810 in sequence; the gas desalination device 300 is used for introducing external air to reduce the concentration of internal waste gas; the air cleaning tower 600 is used for cooling and filtering exhaust gas particles and water-soluble substances in the gas; the gas preheating device 810 is used for preheating the gas flowing through and reducing the far infrared heating power.
VOCs waste gas in the production workshop 100 is driven by the fan 500 to sequentially pass through the primary gas desalting device 310, the primary air cleaning tower 610, the secondary gas desalting device 320, the electrostatic adsorption filter 710, the photocatalytic oxidation box 720, the ion filter box 730, the tertiary gas desalting device 330, the secondary air cleaning tower 620, the gas preheating device 810, the far infrared heating bin 820 and the tertiary air cleaning tower 630 and then is discharged out of the industrial VOCs waste gas treatment equipment.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An industrial VOCs waste gas treatment device is characterized by comprising a pretreatment device, a VOCs treatment device (700) and an ozone treatment device (800), wherein,
the pretreatment device, the VOCs treatment device (700) and the ozone treatment device (800) are connected through a pipeline, a driving device is arranged on the pipeline, and VOCs waste gas in the production workshop (100) can sequentially pass through the pretreatment device, the VOCs treatment device (700) and the ozone treatment device (800) under the driving of the driving device;
ozone treatment device (800) includes far infrared storehouse (820) of heating, far infrared storehouse (820) of heating can handle through the mode of far infrared heating the ozone that VOCs processing apparatus (700) produced.
2. The industrial VOCs waste gas treatment plant of claim 1, further comprising a tertiary gas desalination device (330) and a secondary air scrubber (620), wherein the tertiary gas desalination device (330) and the secondary air scrubber (620) are sequentially disposed on the pipeline in a front-to-back order, and wherein the tertiary gas desalination device (330) and the secondary air scrubber (620) are disposed between the VOCs treatment device (700) and the ozone treatment device (800); the three-stage gas desalting device (330) is used for introducing external air to reduce the concentration of waste gas in the three-stage gas desalting device (330), and the secondary air cleaning tower (620) is used for cooling and filtering waste gas particles and water-soluble substances in the gas.
3. The industrial VOCs waste gas treatment apparatus as claimed in claim 1 or 2, wherein the ozone treatment device (800) further comprises a gas preheating device (810), the gas preheating device (810) is disposed on the pipeline, and the gas is preheated by the gas preheating device (810) and flows to the far infrared warming bin (820).
4. The industrial VOCs waste gas treatment plant of claim 3, wherein the heat used to preheat the gas in the gas preheating device (810) is air compressor waste heat or boiler waste heat.
5. The industrial VOCs waste gas treatment plant of claim 3, wherein the gas preheating means (810) preheats the gas to a temperature in the range of 70 ℃ to 100 ℃.
6. The industrial VOCs waste gas treatment plant of claim 1, wherein the VOCs treatment device (700) comprises an electrostatic adsorption filter (710), a photocatalytic oxidation tank (720), and an ion filtration tank (730); the electrostatic adsorption filter (710), the photocatalytic oxidation box (720) and the ion filter box (730) are sequentially connected in front and back through the pipeline; the photocatalytic oxidation box (720) purifies waste gas by utilizing ultraviolet decomposition and ozone oxidation methods;
the pretreatment device comprises a primary gas desalting device (310), a primary air cleaning tower (610) and a secondary gas desalting device (320), the primary gas desalting device (310), the primary air cleaning tower (610) and the secondary gas desalting device (320) are sequentially connected in series from front to back through the pipeline, and air flow discharged by the secondary gas desalting device (320) can flow to the VOCs treatment device (700); the primary gas desalination device (310) and the secondary gas desalination device (320) are used for introducing external air to reduce the concentration of internal waste gas, and the primary air cleaning tower (610) is used for cooling and filtering waste gas particles and water-soluble substances in the gas.
7. The waste gas treatment equipment for industrial VOCs according to claim 1, further comprising a three-stage air cleaning tower (630), wherein the gas discharged from the ozone treatment device (800) passes through the three-stage air cleaning tower (630) and then is discharged out of the waste gas treatment equipment for industrial VOCs, and the three-stage air cleaning tower (630) is used for cooling and filtering waste gas particles and water-soluble substances in the gas;
the pipeline is provided with a one-way valve (200), and the one-way valve (200) is close to an exhaust gas inlet of the pipeline;
the pipeline is further provided with a fire and explosion protection device (400), and the fire and explosion protection device (400) is arranged between the primary gas desalting device (310) of the pretreatment device and the primary air cleaning tower (610).
8. The apparatus for treating waste gases containing industrial VOCs as claimed in claim 1, further comprising a controller and a plurality of sensors (900), wherein said plurality of sensors (900) are connected to said controller, and said plurality of sensors (900) are respectively disposed at corresponding positions on said pipeline for detecting the concentration of waste gases at corresponding positions on said pipeline.
9. A method for treating waste gases containing industrial VOCs by using the waste gas treatment equipment for industrial VOCs according to any one of claims 1 to 8, comprising the steps of,
and introducing the waste gas treated by the VOCs treatment device (700) into the far infrared heating bin (820), and treating the ozone generated by the VOCs treatment device (700) in a far infrared heating mode to convert the ozone into oxygen.
10. The industrial VOCs waste gas treatment equipment of claim 9, wherein before passing the waste gas generated by the VOCs treatment device (700) through the far infrared warming bin (820), the waste gas is treated by a gas desalination device (300), an air cleaning tower (600) and a gas preheating device (810) in sequence;
the gas desalination device (300) is used for introducing external air to reduce the concentration of internal waste gas;
the air cleaning tower (600) is used for cooling and filtering the waste gas particles and water-soluble substances in the gas;
the gas preheating device (810) is used for preheating gas flowing through.
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