CN114811780B - Low-temperature plasma synergistic heat recovery organic waste gas purification system and method - Google Patents
Low-temperature plasma synergistic heat recovery organic waste gas purification system and method Download PDFInfo
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/003—Ventilation in combination with air cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
- F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
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- 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
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- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
- Treating Waste Gases (AREA)
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Abstract
The invention discloses a low-temperature plasma synergistic heat recovery organic waste gas purification system and a method, wherein the system comprises at least one low-temperature plasma heat recoverer, a filter, a humidifier, a catalyst, an absorber and a water bath absorption bed; at least one group of first electrodes and second electrodes are arranged in the low-temperature plasma heat recoverer; the first electrode and the second electrode are applied with high voltage; fresh air flows from the fresh air inlet of the purifying box to the fresh air outlet of the purifying box under the action of external force, and exhaust air flows from the exhaust inlet of the purifying box to the exhaust outlet of the purifying box. The invention provides a system and a method for realizing efficient purification by multiple synergies of low-temperature plasma and solution absorption, catalysis and adsorption, and simultaneously, the energy of organic waste gas exhaust can be efficiently recovered, the indoor load is reduced, the maintenance is convenient, the operation cost is low, and the economy is high.
Description
Technical Field
The invention belongs to the field of organic waste gas treatment and purification, and in particular relates to a low-temperature plasma synergistic heat recovery organic waste gas purification system and method.
Background
Volatile and semi-volatile organic compounds such as VOCs and SVOCs are widely available, a large amount of volatile and semi-volatile organic compounds such as VOCs and SVOCs are generated in the processes of coal chemical industry, petrochemical industry, fuel paint manufacturing, solvent manufacturing and use, electronic semiconductor manufacturing and the like, and most of volatile and semi-volatile organic compounds such as VOCs and SVOCs have uncomfortable special odor and have toxicity, irritation, teratogenicity and cancerogenicity, and particularly benzene, toluene, formaldehyde and the like can cause great harm to human health. In addition, volatile and semi-volatile organic compounds such as VOCs and SVOCs participate in the formation of ozone and secondary aerosols in the atmospheric environment, which have important effects on regional atmospheric ozone pollution and PM2.5 pollution, and are also important precursors leading to urban haze and photochemical smog. Volatile and semi-volatile organic compounds such as VOCs and SVOCs become one of important pollution sources for environmental destruction and human health, and an economic, safe and reliable effective purification solution thereof is a focus of attention.
Common treatment methods for the emission of pollutants such as VOCs, SVOCs and the like mainly include a solvent absorption method, an adsorption method, a heat treatment method, a biological treatment method and the like. The solvent absorption method has high selectivity to organic components, is easy to cause secondary pollution, the adsorption method has complex flow, high operation cost and secondary pollution risk, the heat treatment method has high energy consumption, other pollutants are easy to generate by combustion, and the biological treatment method has long treatment time and poor effect of removing complex waste gas. The methods generally have the problems of large investment, complex treatment process, high operation cost, poor treatment effect and the like. Therefore, the development of the air purifier with the characteristics of simple structure, reliable operation, high purification efficiency, energy conservation, environmental protection, economy, practicability and the like is an important technical approach for improving the green and environmental protection production in the industries of electronics, semiconductors and the like. The low-temperature plasma is considered as a fourth state except solid, gas and liquid, generates plasma under the action of a strong electric field, contains a large amount of active ingredients such as high-energy charged particles and active particles, generates heat radiation and emits ultraviolet rays, can effectively destroy harmful gases, microorganisms and the like, and can realize harmless treatments such as degradation and transfer of pollutants by chemical reaction of the high-energy electrons and the active substances with waste gas molecules.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a low-temperature plasma synergistic heat recovery organic waste gas purification system and a low-temperature plasma synergistic heat recovery organic waste gas purification method which are suitable for the fields of organic waste gas treatment and purification, so that the system and the method not only can safely, reliably, economically and environmentally-friendly purify harmful gas in the process of treating the emission of the harmful gas, but also can efficiently recover the emission energy of the waste gas. Compared with the traditional harmful gas purifying mode, the system has the advantages of simple structure, good purifying performance, high-efficiency recovery of waste gas and exhaust energy, economy and practicability.
The technical scheme of the invention is as follows:
a low-temperature plasma cooperated heat recovery organic waste gas purification system is characterized in that: comprises at least one low-temperature plasma heat recoverer, a filter, a humidifier, a catalyst, an absorber and a water bath absorption bed; at least one group of first electrodes and second electrodes are arranged in the low-temperature plasma heat recoverer; the first electrode and the second electrode are applied with high voltage; fresh air flows from the fresh air inlet of the purifying box to the fresh air outlet of the purifying box under the action of external force, and exhaust air flows from the exhaust inlet of the purifying box to the exhaust outlet of the purifying box.
The low-temperature plasma synergistic heat recovery organic waste gas purification system is characterized in that: the device comprises a box body, a purifying box exhaust inlet, an exhaust filter, a fresh air fine filter, a fresh air primary filter, a purifying box fresh air inlet, a purifying box fresh air outlet, a fresh air fan, a humidifier, a low-temperature plasma heat recoverer, a water bath absorption bed, an absorber, a catalyst, an exhaust fan, a purifying box exhaust outlet, a water pump, a first valve, a second valve, a third valve, a pipeline, a liquid distributor, a cable and a high-voltage power supply; the fresh air inlet of the purifying box, the fresh air primary filter, the fresh air fine filter, the low-temperature plasma heat recoverer, the catalyst, the humidifier, the fresh air fan and the fresh air outlet of the purifying box form a fresh air purifying channel; the purifying box exhaust inlet, the exhaust filter, the low-temperature plasma heat recoverer, the water bath absorption bed, the absorber, the catalyst, the exhaust fan and the purifying box exhaust outlet form an exhaust purifying channel; the humidifier, the water bath absorption bed, the water pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the liquid distributor form a fresh air humidifying and organic waste gas water bath absorption coupling loop through pipelines. The low-temperature plasma heat recoverer consists of a shell, a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet, a low-temperature plasma heat recoverer fresh air outlet, an insulation module, a first electrode, a second electrode, a pin rib, a cable and a high-voltage power supply; the first electrodes and the second electrodes are connected through the insulation module to form a gradually-shrinking and gradually-expanding gas channel, and a plurality of groups of first electrodes and the second electrodes are connected through the insulation module to form a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet and a low-temperature plasma heat recoverer fresh air outlet; the first electrode is connected with one end of the high-voltage power supply through a cable, and the second electrode is connected with the other end of the high-voltage power supply through a cable; the first electrode and the second electrode are provided with needle ribs; the first electrode, the second electrode and the shell are arranged in an insulating way; the high-voltage power supply, the first electrode and the second electrode are connected through cables to form a high-voltage discharge loop; the shell, the first electrode and the second electrode form a fresh air channel which is communicated with a fresh air inlet of the low-temperature plasma heat recoverer and a fresh air outlet of the low-temperature plasma heat recoverer through an insulation module, and an exhaust air channel which is communicated with an exhaust inlet of the low-temperature plasma heat recoverer and an exhaust outlet of the low-temperature plasma heat recoverer.
In the above technical solution, the low temperature plasma heat recoverer may be a low temperature plasma sensible heat recoverer or a low temperature plasma total heat recoverer; the first electrode and the second electrode of the low-temperature plasma sensible heat recoverer can be of a linear type, a fold line type or a wavy type, and one or more of linear type, fold line type, curve type or a gradually-shrinking and gradually-expanding gas channel can be formed between the first electrode and the second electrode; the structure of the first electrode composite membrane and the second electrode composite membrane of the low-temperature plasma total heat recoverer can be one or more of a linear type, a fold line type and a wave type, and one or more of a linear type, a fold line type, a curve type or a gradually-shrinking and gradually-expanding type gas channel can be formed between the first electrode composite membrane and the second electrode composite membrane; the first electrode and the second electrode of the low-temperature plasma total heat recoverer can be unevenly distributed, can be evenly distributed, and can be arranged in parallel, or can be one or more of snakelike arrangement or net arrangement. The first electrode composite membrane of the low-temperature plasma total heat recoverer is formed by compounding a first electrode and a base membrane or adding one or more of a catalyst and an adsorbent, and the second electrode composite membrane of the low-temperature plasma total heat recoverer is formed by compounding a second electrode and a base membrane or adding one or more of a catalyst and an adsorbent.
Preferably, the material of the first electrode and the second electrode can be one, several or other high-conductivity materials selected from stainless steel, carbon steel, copper, aluminum, tungsten or titanium alloy; the material of the base film is fiber type and macromolecule moisture permeability material; the insulating module is one or more of rubber, plastic, ceramic, glass, mica, asbestos and insulating fibers. The catalyst and absorber material is one or more of noble metal, rare metal, metal oxide, active carbon fiber, diatomite, mesoporous silica, metal organic framework and molecular sieve or composite catalytic adsorption material.
In the above technical scheme, the high-voltage power supply may be one of a high-voltage pulse power supply, a high-voltage direct-current power supply and a high-voltage alternating-current power supply. The low-temperature plasma total heat recovery membrane and the purifier thereof can be used singly or in series or in parallel; the low-temperature plasma synergistic heat recovery organic waste gas purification system can be used singly or in series or in parallel.
The low temperature plasma cooperated heat recovery organic waste gas purifying system is based on the principle that a first electrode and a second electrode of a low temperature plasma heat recoverer form a low temperature plasma field in a gas channel under the action of high voltage; the outdoor fresh air enters a fresh air inlet of a purifying box under the action of a fresh air fan, is filtered by a fresh air primary filter and a fresh air fine filter, then enters a fresh air inlet of a low-temperature plasma heat recoverer, purifies harmful components of the fresh air under the action of a low-temperature plasma field, recovers exhaust energy, enters a catalyst from a fresh air outlet of the low-temperature plasma heat recoverer, further purifies residual harmful components and ozone generated in a low-temperature plasma decomposition process, and is sent into a room from a fresh air outlet of the purifying box after humidity adjustment of a humidifier; the organic waste gas enters an exhaust inlet of the purifying box under the action of an exhaust fan, enters an exhaust inlet of the low-temperature plasma heat recoverer after particulate impurities are removed through an exhaust filter, is rapidly decomposed and releases energy under the action of a low-temperature plasma field, enters a water bath absorption bed through an exhaust outlet of the low-temperature plasma heat recoverer to further absorb residual organic waste gas, enters an absorber to carry out precise absorption treatment, and then enters a catalyst to further purify ozone generated in the low-temperature plasma decomposition process to form harmless gas, and is discharged from the exhaust outlet of the purifying box.
The invention provides an operation method of a low-temperature plasma synergistic heat recovery organic waste gas purification system, which is characterized by comprising the following three operation modes:
1) Fresh air humidifying mode: closing the second valve and the fifth valve, opening the first valve, the third valve and the fourth valve, enabling the water pump, the liquid distributor and the humidifier to form a humidifying loop through pipelines and the valves, enabling water to enter the liquid distributor through the pipelines and the first valve under the action of the water pump to be uniformly sprayed on the humidifier, humidifying the passing fresh air, and discharging redundant water through the third valve and the fourth valve.
2) Organic waste gas water bath absorption mode: closing the first valve, the third valve and the fourth valve, opening the second valve and the fifth valve to enable the water pump, the liquid distributor and the water bath absorption bed to form a water bath absorption loop through the pipeline and the valves, enabling water to enter the liquid distributor through the pipeline, the second valve and the fifth valve under the action of the water pump to be uniformly sprayed on the water bath absorption bed, and discharging the residual organic waste gas through the pipeline after absorbing the residual organic waste gas.
3) Organic waste gas water bath absorption+fresh air humidification mode: closing the second valve and the fourth valve, opening the first valve, the third valve and the fifth valve, enabling the water pump, the liquid distributor, the humidifier and the water bath absorption bed to form a humidifying and water bath absorption loop through the pipeline and the valves, enabling water to enter the liquid distributor through the pipeline and the first valve under the action of the water pump to be uniformly sprayed on the humidifier, enabling fresh air passing through humidification to enter the liquid distributor through the pipeline, the third valve and the fifth valve to be uniformly sprayed on the water bath absorption bed, and enabling residual organic waste gas to be discharged through the pipeline after being absorbed.
The invention has the advantages of simple and compact structure, small volume and occupied area, low-temperature plasma and solution absorption, catalysis and adsorption multiple synergies to realize efficient purification, and can efficiently recover the sensible heat and latent heat energy of exhaust air, reduce the indoor cold and heat loads, and has the advantages of small investment, simple and convenient operation, quick start, convenient maintenance, low operation cost and high economy.
Drawings
Fig. 1 is a schematic diagram of the principle and structure of an embodiment of a low-temperature plasma synergistic heat recovery organic waste gas purification system and method provided by the invention.
Fig. 2 is a schematic diagram of the principle and structure of an embodiment of a low-temperature plasma sensible heat recoverer of the low-temperature plasma synergistic heat recovery organic waste gas purification system and method provided by the invention.
Fig. 3 is a schematic diagram of the principle and structure of an embodiment of a low-temperature plasma total heat recoverer of the low-temperature plasma cooperative heat recovery organic waste gas purification system and method provided by the invention.
In the figure: 1, a box body; 2-an exhaust inlet of the purifying box; 3-an exhaust filter; 4, a fresh air fine filter; 5-a fresh air primary filter; 6, a fresh air inlet of the purifying box; 7, a fresh air outlet of the purifying box; 8-a fresh air fan; 9, a humidifier; 10-a low temperature plasma heat recoverer; 11-a water bath absorption bed; 12-an adsorber; 13-a catalyst; 14-an exhaust fan; 15-an exhaust outlet of the purifying box; 16-a water pump; 17-a first valve; 18-a second valve; 19-a third valve; 20-a pipeline; 21-a spray head; 22-cable; 23-high voltage power supply; 24-a shell; 25-an exhaust inlet of the heat recoverer; 26-an exhaust outlet of the heat recoverer; 27-a fresh air inlet of the heat recoverer; 28-a fresh air outlet of the heat recoverer; 29-an insulation module; 30—a first electrode; 31-a second electrode; 32-pin rib; 33-a base film; 34—a first electrode composite film; 35-a second electrode composite film; 36-fourth valve; 37-fifth valve.
Detailed Description
The invention is further described with reference to the drawings and detailed description which follow:
FIG. 1 is a schematic diagram of the principle and structure of a low temperature plasma synergistic heat recovery organic waste gas purification system and method, comprising at least one low temperature plasma heat recovery device, filter, humidifier, catalyst, adsorber, water bath absorption bed; at least one group of first electrodes and second electrodes are arranged in the low-temperature plasma heat recoverer; the first electrode and the second electrode are applied with high voltage; fresh air flows from the fresh air inlet of the purifying box to the fresh air outlet of the purifying box under the action of external force, and exhaust air flows from the exhaust inlet of the purifying box to the exhaust outlet of the purifying box.
The low-temperature plasma synergistic heat recovery organic waste gas purification system is characterized in that: the device comprises a box body, a purifying box exhaust inlet, an exhaust filter, a fresh air fine filter, a fresh air primary filter, a purifying box fresh air inlet, a purifying box fresh air outlet, a fresh air fan, a humidifier, a low-temperature plasma heat recoverer, a water bath absorption bed, an absorber, a catalyst, an exhaust fan, a purifying box exhaust outlet, a water pump, a first valve, a second valve, a third valve, a pipeline, a liquid distributor, a cable and a high-voltage power supply; the fresh air inlet of the purifying box, the fresh air primary filter, the fresh air fine filter, the low-temperature plasma heat recoverer, the catalyst, the humidifier, the fresh air fan and the fresh air outlet of the purifying box form a fresh air purifying channel; the purifying box exhaust inlet, the exhaust filter, the low-temperature plasma heat recoverer, the water bath absorption bed, the absorber, the catalyst, the exhaust fan and the purifying box exhaust outlet form an exhaust purifying channel; the humidifier, the water bath absorption bed, the water pump, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the liquid distributor form a fresh air humidifying and organic waste gas water bath absorption coupling loop through pipelines. The low-temperature plasma heat recoverer consists of a shell, a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet, a low-temperature plasma heat recoverer fresh air outlet, an insulation module, a first electrode, a second electrode, a pin rib, a cable and a high-voltage power supply; the first electrodes and the second electrodes are connected through the insulation module to form a gradually-shrinking and gradually-expanding gas channel, and a plurality of groups of first electrodes and the second electrodes are connected through the insulation module to form a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet and a low-temperature plasma heat recoverer fresh air outlet; the first electrode is connected with one end of the high-voltage power supply through a cable, and the second electrode is connected with the other end of the high-voltage power supply through a cable; the first electrode and the second electrode are provided with needle ribs; the first electrode, the second electrode and the shell are arranged in an insulating way; the high-voltage power supply, the first electrode and the second electrode are connected through cables to form a high-voltage discharge loop; the shell, the first electrode and the second electrode form a fresh air channel which is communicated with a fresh air inlet of the low-temperature plasma heat recoverer and a fresh air outlet of the low-temperature plasma heat recoverer through an insulation module, and an exhaust air channel which is communicated with an exhaust inlet of the low-temperature plasma heat recoverer and an exhaust outlet of the low-temperature plasma heat recoverer.
The low-temperature plasma heat recoverer can be a low-temperature plasma sensible heat recoverer or a low-temperature plasma total heat recoverer; the first electrode and the second electrode of the low-temperature plasma sensible heat recoverer can be of a linear type, a fold line type or a wavy type, and one or more of linear type, fold line type, curve type or a gradually-shrinking and gradually-expanding gas channel can be formed between the first electrode and the second electrode; the structure of the first electrode composite membrane and the second electrode composite membrane of the low-temperature plasma total heat recoverer can be one or more of a linear type, a fold line type and a wave type, and one or more of a linear type, a fold line type, a curve type or a gradually-shrinking and gradually-expanding type gas channel can be formed between the first electrode composite membrane and the second electrode composite membrane; the first electrode and the second electrode of the low-temperature plasma total heat recoverer can be unevenly distributed, can be evenly distributed, and can be arranged in parallel, or can be one or more of snakelike arrangement or net arrangement. The first electrode composite membrane of the low-temperature plasma total heat recoverer is formed by compounding a first electrode and a base membrane or adding one or more of a catalyst and an adsorbent, and the second electrode composite membrane of the low-temperature plasma total heat recoverer is formed by compounding a second electrode and a base membrane or adding one or more of a catalyst and an adsorbent.
The material of the first electrode and the second electrode can be one, several or other high-conductivity materials selected from stainless steel, carbon steel, copper, aluminum, tungsten or titanium alloy; the material of the base film is fiber type and macromolecule moisture permeability material; the insulating module is one or more of rubber, plastic, ceramic, glass, mica, asbestos and insulating fibers. The catalyst and absorber material is one or more of noble metal, rare metal, metal oxide, active carbon fiber, diatomite, mesoporous silica, metal organic framework and molecular sieve or composite catalytic adsorption material.
The high-voltage power supply can be one of a high-voltage pulse power supply, a high-voltage direct-current power supply and a high-voltage alternating-current power supply. The low-temperature plasma total heat recovery membrane and the purifier thereof can be used singly or in series or in parallel; the low-temperature plasma synergistic heat recovery organic waste gas purification system can be used singly or in series or in parallel.
The low temperature plasma cooperated heat recovery organic waste gas purifying system is based on the principle that a first electrode and a second electrode of a low temperature plasma heat recoverer form a low temperature plasma field in a gas channel under the action of high voltage; the outdoor fresh air enters a fresh air inlet of a purifying box under the action of a fresh air fan, is filtered by a fresh air primary filter and a fresh air fine filter, then enters a fresh air inlet of a low-temperature plasma heat recoverer, purifies harmful components of the fresh air under the action of a low-temperature plasma field, recovers exhaust energy, enters a catalyst from a fresh air outlet of the low-temperature plasma heat recoverer, further purifies residual harmful components and ozone generated in a low-temperature plasma decomposition process, and is sent into a room from a fresh air outlet of the purifying box after humidity adjustment of a humidifier; the organic waste gas enters an exhaust inlet of the purifying box under the action of an exhaust fan, enters an exhaust inlet of the low-temperature plasma heat recoverer after particulate impurities are removed through an exhaust filter, is rapidly decomposed and releases energy under the action of a low-temperature plasma field, enters a water bath absorption bed through an exhaust outlet of the low-temperature plasma heat recoverer to further absorb residual organic waste gas, enters an absorber to carry out precise absorption treatment, and then enters a catalyst to further purify ozone generated in the low-temperature plasma decomposition process to form harmless gas, and is discharged from the exhaust outlet of the purifying box.
The invention provides an operation method of a low-temperature plasma synergistic heat recovery organic waste gas purification system, which is characterized by comprising the following three operation modes:
1) Fresh air humidifying mode: closing the second valve and the fifth valve, opening the first valve, the third valve and the fourth valve, enabling the water pump, the liquid distributor and the humidifier to form a humidifying loop through pipelines and the valves, enabling water to enter the liquid distributor through the pipelines and the first valve under the action of the water pump to be uniformly sprayed on the humidifier, humidifying the passing fresh air, and discharging redundant water through the third valve and the fourth valve.
2) Organic waste gas water bath absorption mode: closing the first valve, the third valve and the fourth valve, opening the second valve and the fifth valve to enable the water pump, the liquid distributor and the water bath absorption bed to form a water bath absorption loop through the pipeline and the valves, enabling water to enter the liquid distributor through the pipeline, the second valve and the fifth valve under the action of the water pump to be uniformly sprayed on the water bath absorption bed, and discharging the residual organic waste gas through the pipeline after absorbing the residual organic waste gas.
3) Organic waste gas water bath absorption+fresh air humidification mode: closing the second valve and the fourth valve, opening the first valve, the third valve and the fifth valve, enabling the water pump, the liquid distributor, the humidifier and the water bath absorption bed to form a humidifying and water bath absorption loop through the pipeline and the valves, enabling water to enter the liquid distributor through the pipeline and the first valve under the action of the water pump to be uniformly sprayed on the humidifier, enabling fresh air passing through humidification to enter the liquid distributor through the pipeline, the third valve and the fifth valve to be uniformly sprayed on the water bath absorption bed, and enabling residual organic waste gas to be discharged through the pipeline after being absorbed.
FIG. 2 is a schematic diagram of the principle and structure of an embodiment of a low-temperature plasma sensible heat recoverer of a low-temperature plasma collaborative heat recovery organic waste gas purification system and method provided by the invention, which comprises a shell, a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet, a low-temperature plasma heat recoverer fresh air outlet, an insulation module, a first electrode, a second electrode, a pin rib, a cable and a high-voltage power supply; the first electrodes and the second electrodes are connected through the insulation module to form a gradually-shrinking and gradually-expanding gas channel, and a plurality of groups of first electrodes and the second electrodes are connected through the insulation module to form a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet and a low-temperature plasma heat recoverer fresh air outlet; the first electrode is connected with one end of the high-voltage power supply through a cable, and the second electrode is connected with the other end of the high-voltage power supply through a cable; the first electrode and the second electrode are provided with needle ribs; the first electrode, the second electrode and the shell are arranged in an insulating way; the high-voltage power supply, the first electrode and the second electrode are connected through cables to form a high-voltage discharge loop; the shell, the first electrode and the second electrode form a fresh air channel which is communicated with a fresh air inlet of the low-temperature plasma heat recoverer and a fresh air outlet of the low-temperature plasma heat recoverer through an insulation module, and an exhaust air channel which is communicated with an exhaust inlet of the low-temperature plasma heat recoverer and an exhaust outlet of the low-temperature plasma heat recoverer.
The structures of the first electrode and the second electrode can be one or more of linear type, fold line type and wave type, and one or more of linear type, fold line type, curve type or gradually-enlarged gas channels can be formed between the first electrode plate and the second electrode plate; the material of the first electrode, the second electrode and the needle rib can be one, several or high-conductivity materials of stainless steel, carbon steel, copper, aluminum, tungsten or titanium alloy; the insulating module is one or more of rubber, plastic, ceramic, glass, mica, asbestos and insulating fibers; the high-voltage power supply can be one of a high-voltage pulse power supply, a high-voltage direct-current power supply and a high-voltage alternating-current power supply; the low-temperature plasma heat recoverer can be used alone, or can be used in series or in parallel.
The low-temperature plasma heat recoverer comprises a first electrode and a second electrode which form a low-temperature plasma field in a gas channel under the action of high voltage, an organic waste gas exhaust enters the gas channel from an exhaust inlet of the low-temperature plasma heat recoverer, accelerating and increasing gas flow disturbance in the convergent-divergent channel, rapidly decomposing under the high-voltage plasma discharge action of the first electrode, the second electrode and the needle ribs, converting the gas into harmless gas, and discharging the harmless gas from an exhaust outlet of the low-temperature plasma heat recoverer; the outdoor fresh air enters the air channel from the fresh air inlet of the low-temperature plasma heat recoverer, the harmful components of the fresh air are purified in the low-temperature plasma channel formed by the first electrode, the second electrode and the needle ribs, and the fresh air is sent into the room through the fresh air outlet of the low-temperature plasma heat recoverer; simultaneously, when fresh air and organic waste gas exhaust flow in the gas channel, the energy of the organic waste gas exhaust can be recovered through the heat transmission effect of the first electrode, the second electrode and the needle ribs.
FIG. 3 is a schematic diagram of the principle and structure of an embodiment of a low-temperature plasma total heat recoverer of a low-temperature plasma synergistic heat recovery organic waste gas purification system and method provided by the invention, which comprises a high-voltage power supply, a cable, a base film, a first electrode, a second electrode, a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet, a low-temperature plasma heat recoverer fresh air outlet, a shell, an insulation module, a first electrode composite film and a second electrode composite film; the first electrode composite film is formed by compounding a base film and a first electrode, and the second electrode composite film is formed by compounding a base film and a second electrode; the first electrode composite membrane and the second electrode composite membrane are connected through an insulation module to form a gas fluid channel, and a plurality of groups of first electrode composite membranes and second electrode composite membranes are connected through the insulation module to form a low-temperature plasma heat recoverer exhaust inlet, a low-temperature plasma heat recoverer exhaust outlet, a low-temperature plasma heat recoverer fresh air inlet and a low-temperature plasma heat recoverer fresh air outlet; the first electrode and the second electrode are unevenly distributed, and the line distance between the exhaust inlet of the low-temperature plasma heat recoverer and the exhaust outlet electrode line of the low-temperature plasma heat recoverer is sequentially increased; the first electrode is connected with one end of the high-voltage power supply through a cable, and the second electrode is connected with the other end of the high-voltage power supply through a cable; the first electrode composite film, the second electrode composite film and the shell are arranged in an insulating way; the high-voltage power supply, the first electrode and the second electrode are connected through cables to form a high-voltage discharge loop; the shell, the first electrode composite membrane and the second electrode composite membrane form a fresh air channel communicated with a fresh air inlet of the low-temperature plasma heat recoverer and a fresh air outlet of the low-temperature plasma heat recoverer through an insulation module, and an exhaust air channel communicated with an exhaust inlet of the low-temperature plasma heat recoverer and an exhaust outlet of the low-temperature plasma heat recoverer.
The structures of the first electrode composite membrane and the second electrode composite membrane can be one or more of linear type, fold line type and wave type, and one or more of linear type, fold line type, curve type or gradually-shrinking and gradually-expanding type gas channels can be formed between the first electrode composite membrane and the second electrode composite membrane; the first electrode composite film is formed by compounding a first electrode and a base film or adding one or more of a catalyst and an adsorbent, and the second electrode composite film is formed by compounding a second electrode and a base film or adding one or more of a catalyst and an adsorbent. The first electrodes and the second electrodes can be unevenly distributed, can be evenly distributed, and can be arranged in parallel, or can be one or more of snakelike arrangement or net arrangement.
The material of the first electrode and the second electrode can be one, several or other high-conductivity materials selected from stainless steel, carbon steel, copper, aluminum, tungsten or titanium alloy; the material of the base film is fiber type and macromolecule moisture permeability material; the insulating module is one or more of rubber, plastic, ceramic, glass, mica, asbestos and insulating fibers.
The high-voltage power supply can be one of a high-voltage pulse power supply, a high-voltage direct-current power supply and a high-voltage alternating-current power supply. The low-temperature plasma heat recoverer can be used singly or in series or in parallel.
The low-temperature plasma total heat recoverer comprises a first electrode, a second electrode, a first electrode and a second electrode, wherein the first electrode and the second electrode form a low-temperature plasma field in a gas channel under the action of high voltage; the outdoor fresh air enters the gas channel from the fresh air inlet of the low-temperature plasma heat recoverer, harmful components of the fresh air are purified in the low-temperature plasma channel formed by the first electrode and the second electrode, and the fresh air is sent into the room through the fresh air outlet of the low-temperature plasma heat recoverer; meanwhile, when the fresh air and the organic waste gas flow in the gas channel, the sensible heat and the latent heat energy of the organic waste gas can be recovered through the heat transmission function of the first electrode composite membrane and the second electrode composite membrane.
Claims (8)
1. A low-temperature plasma cooperated heat recovery organic waste gas purification system is characterized in that: comprises at least one low-temperature plasma heat recoverer (10), an exhaust filter (3), a fresh air fine filter (4), a fresh air primary filter (5), a humidifier (9), a catalyst (13), an absorber (12) and a water bath absorption bed (11); at least one group of first electrodes and second electrodes are arranged in the low-temperature plasma heat recoverer (10); the first electrode and the second electrode are applied with high voltage;
the low-temperature plasma heat recoverer (10), the exhaust filter (3), the fresh air fine filter (4), the fresh air primary filter (5), the humidifier (9), the catalyst (13), the absorber (12) and the water bath absorption bed (11) are all arranged in the box body (1); the purifying box exhaust inlet (2) is arranged at the side part of the box body (1);
the purifying box fresh air inlet (6), the fresh air primary filter (5), the fresh air fine filter (4), the low-temperature plasma heat recoverer (10), the catalyst (13), the humidifier (9), the fresh air fan (8) and the purifying box fresh air outlet (7) are sequentially arranged in the box body to form a fresh air purifying channel;
the purifying box exhaust inlet (2), the exhaust filter (3), the low-temperature plasma heat recoverer (10), the water bath absorption bed (11), the absorber (12), the catalyst (13), the exhaust fan (14) and the purifying box exhaust outlet (15) are sequentially arranged in the box body to form an exhaust purifying channel;
the humidifier (9), the water bath absorption bed (11), the water pump (16), the first valve (17), the second valve (18), the third valve (19), the fourth valve (36), the fifth valve (37) and the liquid distributor (21) are connected through a pipeline (20) to form a fresh air humidification and organic waste gas water bath absorption coupling loop;
the low-temperature plasma heat recoverer (10) consists of a shell (24), a low-temperature plasma heat recoverer exhaust inlet (25), a low-temperature plasma heat recoverer exhaust outlet (26), a low-temperature plasma heat recoverer fresh air inlet (27), a low-temperature plasma heat recoverer fresh air outlet (28), an insulation module (29), a first electrode (30), a second electrode (31), a pin rib (32), a cable (22) and a high-voltage power supply (23); the first electrodes (30) and the second electrodes (31) are connected through an insulation module (29) to form a tapered and gradually-expanded gas channel, and a plurality of groups of first electrodes (30) and the second electrodes (31) are connected through the insulation module (29) to form a low-temperature plasma heat recoverer exhaust inlet (25), a low-temperature plasma heat recoverer exhaust outlet (26), a low-temperature plasma heat recoverer fresh air inlet (27) and a low-temperature plasma heat recoverer fresh air outlet (28); the first electrode (30) is connected with one end of the high-voltage power supply (23) through a cable (22), and the second electrode (31) is connected with the other end of the high-voltage power supply (23) through the cable (22); the first electrode (30) and the second electrode (31) are provided with needle ribs (32); the first electrode (30), the second electrode (31) and the shell (24) are arranged in an insulating way; the high-voltage power supply (23), the first electrode (30) and the second electrode (31) are connected through a cable (22) to form a high-voltage discharge loop; the shell (24), the first electrode (30) and the second electrode (31) form a fresh air channel communicated with a fresh air inlet (27) of the low-temperature plasma heat recoverer, a fresh air outlet (28) of the low-temperature plasma heat recoverer and an exhaust air channel communicated with an exhaust inlet (25) of the low-temperature plasma heat recoverer and an exhaust outlet (26) of the low-temperature plasma heat recoverer through an insulation module (29).
2. The low temperature plasma collaborative heat recovery organic exhaust gas purification system according to claim 1, wherein: the low-temperature plasma heat recoverer (10) is a low-temperature plasma sensible heat recoverer or a low-temperature plasma total heat recoverer; the first electrode and the second electrode of the low-temperature plasma sensible heat recoverer have the structure of one or more of a linear type, a folded line type and a wavy type, and one or more of a linear type, a folded line type, a curved line type or a gradually-shrinking and gradually-expanding gas channel is formed between the first electrode and the second electrode; the structure of the first electrode composite membrane and the second electrode composite membrane of the low-temperature plasma total heat recoverer is one or more of a linear type, a folded line type and a wavy type, and one or more of a linear type, a folded line type, a curved line type or a gradually-expanding gas channel is formed between the first electrode composite membrane and the second electrode composite membrane; the first electrode and the second electrode of the low-temperature plasma total heat recoverer are unevenly distributed or evenly distributed, or are arranged in parallel, or are arranged in a serpentine or net shape, or are arranged in one or more of the same; the first electrode composite membrane of the low-temperature plasma total heat recoverer is formed by compounding a first electrode and a base membrane or adding one or more of a catalyst and an adsorbent, and the second electrode composite membrane of the low-temperature plasma total heat recoverer is formed by compounding a second electrode and a base membrane or adding one or more of a catalyst and an adsorbent.
3. The low temperature plasma collaborative heat recovery organic exhaust gas purification system according to claim 2, wherein: the material of the first electrode and the second electrode is one or more of stainless steel, carbon steel, copper, aluminum, tungsten or titanium alloy; the material of the base film is fiber or polymer moisture permeability material; the insulating module is one or more of rubber, plastic, ceramic, glass, mica, asbestos and insulating fibers.
4. The low temperature plasma collaborative heat recovery organic exhaust gas purification system according to claim 1, wherein: the catalyst and adsorber material is one or more of noble metal, rare metal, metal oxide, active carbon fiber, diatomite, mesoporous silica, metal organic framework and molecular sieve.
5. The low temperature plasma collaborative heat recovery organic exhaust gas purification system according to claim 1, wherein: the high-voltage power supply is one of a high-voltage pulse power supply, a high-voltage direct-current power supply or a high-voltage alternating-current power supply.
6. The low temperature plasma collaborative heat recovery organic exhaust gas purification system according to claim 2, wherein: the low-temperature plasma total heat recovery film is singly used, and is used in series or in parallel; the low-temperature plasma synergistic heat recovery organic waste gas purification system is singly used, and is used in series or in parallel.
7. The low temperature plasma collaborative heat recovery organic exhaust gas purification system according to claim 1, wherein: the principle is that a first electrode and a second electrode of a low-temperature plasma heat recoverer form a low-temperature plasma field in a gas channel under the action of high-voltage; the outdoor fresh air enters a fresh air inlet of a purifying box under the action of a fresh air fan, is filtered by a fresh air primary filter and a fresh air fine filter, then enters a fresh air inlet of a low-temperature plasma heat recoverer, purifies harmful components of the fresh air under the action of a low-temperature plasma field, recovers exhaust energy, enters a catalyst from a fresh air outlet of the low-temperature plasma heat recoverer, further purifies residual harmful components and ozone generated in a low-temperature plasma decomposition process, and is sent into a room from a fresh air outlet of the purifying box after humidity adjustment of a humidifier; the organic waste gas enters an exhaust inlet of the purifying box under the action of an exhaust fan, enters an exhaust inlet of the low-temperature plasma heat recoverer after particulate impurities are removed through an exhaust filter, is rapidly decomposed and releases energy under the action of a low-temperature plasma field, enters a water bath absorption bed through an exhaust outlet of the low-temperature plasma heat recoverer to further absorb residual organic waste gas, enters an absorber to carry out precise absorption treatment, and then enters a catalyst to further purify ozone generated in the low-temperature plasma decomposition process to form harmless gas, and is discharged from the exhaust outlet of the purifying box.
8. A method of operating a low temperature plasma-assisted heat recovery organic waste gas purification system employing the method of claim 1, comprising the following three modes of operation:
1) Fresh air humidifying mode: closing a second valve (18) and a fifth valve (37), opening a first valve (17), a third valve (19) and a fourth valve (36), enabling a water pump (16), a liquid distributor (21) and a humidifier (9) to form a humidifying loop through a pipeline (20) and the valves, enabling water to enter the liquid distributor (21) to be uniformly sprayed on the humidifier (9) under the action of the water pump (16) through the pipeline (20) and the first valve (17), humidifying fresh air passing through, and discharging redundant water through the third valve (19) and the fourth valve (36);
2) Organic waste gas water bath absorption mode: closing the first valve (17), the third valve (19) and the fourth valve (36), opening the second valve (18) and the fifth valve (37) to enable the water pump (16), the liquid distributor (21) and the water bath absorption bed (11) to form a water bath absorption loop through the pipeline (20) and the valves, enabling water to enter the liquid distributor (21) under the action of the water pump (16) to be evenly sprayed on the water bath absorption bed (11) through the pipeline (20), the second valve (18) and the fifth valve (37), and discharging residual organic waste gas through the pipeline (20) after absorbing the residual organic waste gas;
3) Organic waste gas water bath absorption and fresh air humidification modes: closing the second valve (18) and the fourth valve (36), opening the first valve (17), the third valve (19) and the fifth valve (37), enabling the water pump (16), the liquid distributor (21), the humidifier (9) and the water bath absorption bed (11) to form a humidifying and water bath absorption loop through the pipeline (20) and the valves, enabling water to enter the liquid distributor (21) to be uniformly sprayed on the humidifier (9) through the pipeline (20) and the first valve (17) under the action of the water pump (16), enabling fresh air passing through humidification to enter the liquid distributor (21) to be uniformly sprayed on the water bath absorption bed (11) through the pipeline (20), and enabling residual organic waste gas to be discharged through the pipeline (20).
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