CN115253673B - Malodorous gas treatment system - Google Patents
Malodorous gas treatment system Download PDFInfo
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- CN115253673B CN115253673B CN202211023653.2A CN202211023653A CN115253673B CN 115253673 B CN115253673 B CN 115253673B CN 202211023653 A CN202211023653 A CN 202211023653A CN 115253673 B CN115253673 B CN 115253673B
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- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 3
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- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The application discloses a malodorous gas treatment system, which comprises a gas-liquid reaction tower and an ozone advanced treatment device; the gas-liquid reaction tower comprises a reaction tower body, wherein a liquid accumulation cavity and an aerator for aerating external waste gas into liquid in the liquid accumulation cavity are arranged at the bottom of the reaction tower body; the upper part of the aerator is sequentially provided with a gas-liquid mixing device for emulsifying waste gas overflowed due to the fact that liquid in the liquid accumulation cavity reaches a saturated dissolution absorption state, a spraying device for spraying the waste gas, a foam removal decomposition device for removing foam in the waste gas and decomposing ozone, and a negative pressure fan for discharging the waste gas out of the reaction tower body; according to the technical scheme, the treatment efficiency and the treatment effect of the malodorous gas are improved, and the treatment cost is reduced.
Description
Technical Field
The application relates to the technical field of waste gas treatment, in particular to a malodorous gas treatment system.
Background
Industry the petroleum industry is a relatively malodorous and polluting industry that is of great concern worldwide. The malodorous components generated in oil refining are mainly substances such as hydrogen sulfide, methyl mercaptan, ethanethiol, dimethyl sulfide, ethanesulfide, carbon disulfide, dimethyl disulfide, ammonia, methylamine, dimethylamine, trimethylamine, benzene, toluene, xylene, styrene, phenol, cresol, total sulfur, total hydrocarbons, C1-C8 hydrocarbons and the like, and the malodorous pollutants are classified into sulfides, hydrocarbons, ammonia, organic amines and the like.
Malodorous gas in daily life of residents mainly comes from garbage leachate, which is secondary pollutants generated by extraction, hydrolysis and fermentation due to leaching and scouring of rainwater and soaking of surface water and underground water in the stacking and disposal processes of garbage, mainly comes from water contained in the garbage, water generated by biochemical reaction of the garbage and the like, and comprises leachate of comprehensive garbage treatment plants, kitchen garbage treatment plants, household garbage treatment plants and garbage landfill sites. The garbage leachate generates high-concentration malodorous gas in the treatment process, and the main components of the garbage leachate are ammonia and hydrogen sulfide, and organic matters such as mercaptan, thioether, ethanol, volatile organic acid, alkane, esters and the like generated in the treatment process of the leachate.
The malodorous gas has a plurality of pollution components, thus not only having serious influence on the ecological environment, but also having great harm to the health of human bodies, and causing serious injury to the eyesight and smell of people. Some have great potential threat to human hair, skin and endocrine systems, and even may cause toxic death accidents. The development process of the malodorous gas treatment process comprises the steps of an initial water washing method, an active carbon adsorption method, a biological deodorization method, a plant liquid deodorization method, a high-energy ion deodorization method and other treatment processes which are commonly adopted at present.
The traditional malodorous gas treatment process such as a biological filter method has the defects of large occupied area, sensitivity to environmental climate change, poor impact load resistance, complex operation and the like; the plant liquid deodorization method has the defects of higher operation cost, larger influence by climatic factors and the like; the high-energy ion deodorization method has high operation and maintenance cost and safety risk
Disclosure of Invention
The utility model provides a malodorous gas treatment system promotes malodorous gas's treatment effeciency and treatment effect, reduces processing cost.
The embodiment of the application provides a malodorous gas treatment system, which comprises a gas-liquid reaction tower and an ozone advanced treatment device;
the gas-liquid reaction tower comprises a reaction tower body, wherein a liquid accumulation cavity and an aerator for aerating external waste gas into liquid in the liquid accumulation cavity are arranged at the bottom of the reaction tower body; the upper part of the aerator is sequentially provided with a gas-liquid mixing device for emulsifying waste gas overflowed due to the fact that liquid in the liquid accumulation cavity reaches a saturated dissolution absorption state, a spraying device for spraying the waste gas, a defoaming decomposition device for removing foam in the waste gas and decomposing ozone, and a negative pressure fan for discharging the waste gas out of the reaction tower body;
the ozone advanced treatment device comprises an ozone catalytic oxidation tower, an ozone catalyst filling layer for catalyzing ozone is arranged in the ozone catalytic oxidation tower, and a liquid recovery cavity is arranged at the bottom of the ozone catalyst filling layer; the ozone catalyst filling layer is connected with a liquid outlet of the effusion cavity through a liquid recovery pipeline; an ejector for adding ozone into the pipeline is arranged on the liquid recovery pipeline;
the liquid outlet of the liquid recovery cavity is connected with a liquid circulation pipeline, the exhaust port of the ozone catalytic oxidation tower is connected with a gas circulation pipeline, and an emulsifying layer communicated with the liquid circulation pipeline and the gas circulation pipeline is arranged between the spraying device and the gas-liquid mixing device; the liquid circulation pipeline is provided with a micro-bubble generator for generating bubbles of liquid in the liquid circulation pipeline.
In some embodiments, the aerator is configured as a cyclone aerator, the cyclone aerator comprises a cyclone air duct for conveying the waste gas, and a plurality of cyclone aeration heads for aerating the waste gas into the liquid in the effusion cavity are arranged on the cyclone air duct.
In some embodiments, the gas-liquid mixing device comprises a plurality of cyclone tubes arranged in parallel, and spiral flow channels for the exhaust gas to flow through are arranged inside the cyclone tubes.
In some embodiments, the spraying device comprises a spraying pipe communicated with external spraying liquid, a plurality of spraying heads for spraying the spraying liquid are arranged on the spraying pipe, and the spraying liquid is hydrogen peroxide.
In some embodiments, the defoaming decomposition device comprises a folded plate defoaming layer for defoaming and a catalytic decomposition layer for catalytic decomposition of ozone.
In some embodiments, a plurality of foam removing folded plates arranged in parallel are installed in the foam removing layer of the folded plate, gaps between two adjacent foam removing folded plates form a flow passage for the waste gas to flow through, and the flow passage is in a curved arrangement.
In some embodiments, the catalytic decomposition layer is filled with a plurality of silk screens, and the silk screens are arranged into a silk screen structure made of manganese oxide materials.
In some embodiments, a lifting pump for conveying the liquid and a filter for filtering the liquid are sequentially installed between the liquid outlet of the liquid accumulation cavity and the ejector.
In some embodiments, the filter is arranged as two filters connected in parallel, the two filters are one by one, and a differential pressure transmitter is installed on the connecting pipeline of the two filters.
In some embodiments, a flowmeter and a pressure sensor are sequentially arranged at the air inlet of the aerator; a liquid switch valve is arranged at the liquid outlet of the liquid accumulation cavity; a liquid level control valve is arranged at the liquid outlet of the liquid recovery cavity, and a liquid level meter connected with the liquid level control valve is arranged at the top of the ozone catalytic oxidation tower; the exhaust port of the ozone catalytic oxidation tower is provided with a pressure gauge and a gas switch valve.
Compared with the prior art, the beneficial effects of this application are:
1. overcomes the defects of the traditional ozone oxidation technology, and provides an integrated system with high contact probability of ozone and waste gas, high ozone utilization rate and good pollutant removal effect;
2. ozone and waste gas absorption liquid are combined to generate micro-bubble forms through an ozone catalytic oxidation tower, so that the ozone oxidation effect is enhanced, the ozone consumption is reduced, the residence time is shortened, and the problems of low treatment efficiency, high cost and the like of the traditional waste gas treatment process are solved;
3. the liquid can be recycled, so that the liquid is distributed more uniformly on the surface of the catalyst, resources are saved, when the waste gas absorption liquid flows from the ozone catalyst filling layer to the liquid recovery cavity at the bottom of the ozone catalytic oxidation tower, the waste gas absorption liquid is conveyed to the emulsifying layer of the reaction tower body through the liquid circulation pipeline, the waste gas treatment quality is improved, and the problem of resource waste in the traditional waste gas treatment process is solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from the structures shown in these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a gas-liquid reaction tower structure according to the present application;
FIG. 2 is a schematic diagram of the overall structure of the malodorous gas treatment system of the present application;
FIG. 3 is a schematic view of the structure of the aerator of the present application;
FIG. 4 is a top view of the structure of the gas-liquid mixing device of the present application;
FIG. 5 is a top view of a swirl tube structure of the present application;
the realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The malodorous gas treatment system provided by the embodiment is characterized by comprising a gas-liquid reaction tower and an ozone advanced treatment device, referring to fig. 1 and 2;
the gas-liquid reaction tower comprises a reaction tower body 1, wherein a liquid accumulation cavity 2 and an aerator 3 for aerating external waste gas into liquid in the liquid accumulation cavity 2 are arranged at the bottom of the reaction tower body 1; a gas-liquid mixing device 4 for carrying out emulsification treatment on waste gas overflowed due to the fact that liquid in the effusion cavity 2 reaches a saturated dissolution absorption state, a spraying device 5 for spraying the waste gas, a foam removal decomposition device 6 for removing foam in the waste gas and decomposing ozone, and a negative pressure fan 7 for discharging the waste gas out of the reaction tower body 1 are sequentially arranged above the aerator 3;
the ozone advanced treatment device comprises an ozone catalytic oxidation tower 8, an ozone catalyst filling layer 81 for catalyzing ozone is arranged in the ozone catalytic oxidation tower 8, and a liquid recovery cavity 82 is arranged at the bottom of the ozone catalyst filling layer 81; the ozone catalyst filling layer 81 is connected with a liquid outlet of the effusion cavity 2 through a liquid recovery pipeline 11; the liquid recovery pipeline 11 is provided with an ejector 12 for adding ozone into the pipeline;
the liquid outlet of the liquid recovery cavity 82 is connected with a liquid circulation pipeline 13, the exhaust port of the ozone catalytic oxidation tower 8 is connected with a gas circulation pipeline 14, and an emulsifying layer 9 communicated with the liquid circulation pipeline 13 and the gas circulation pipeline 14 is arranged between the spraying device 5 and the gas-liquid mixing device 4; the liquid circulation pipe 13 is provided with a microbubble generator 15 for generating bubbles in the liquid therein.
In this embodiment, the gas-liquid reaction tower is used for converting the gas phase into the liquid phase through the aeration mode, and delivering the liquid phase into the ozone advanced treatment device for further advanced treatment, and the ozone advanced treatment device delivers the liquid phase waste gas back to the gas-liquid reaction tower for further treatment through the liquid circulation pipeline 13 after advanced treatment, and then the waste gas reaches the standard and is discharged. Thereby realizing the circulation treatment of the waste gas and improving the treatment effect.
The ejector 12 in this embodiment can fully mix ozone with the exhaust gas converted into the liquid phase, and then enter the ozone catalyst filling layer 81, and under the catalytic action of the ozone catalyst, ozone is rapidly decomposed and generates hydroxyl radicals with stronger oxidability, so that the ozone oxidation capability and reaction rate are improved. The treated waste gas absorption liquid is subjected to micro-bubble generator 15 to form micro-bubble liquid phase for dissolving ozone, the micro-bubble liquid phase is conveyed into the emulsion layer 9 of the reaction tower body 1 for secondary treatment, and the ozone tail gas is also conveyed into the emulsion layer 9 of the reaction tower body 1 for further absorption treatment through a gas circulation pipeline 14.
Further, a lift pump 16 for delivering the liquid and a filter 17 for filtering the liquid are sequentially installed between the liquid outlet of the liquid accumulation cavity 2 and the ejector 12. The lift pump 16 may power the transport of the exhaust gas converted into the liquid phase, and the filter 17 may filter out impurities therein.
Specifically, the filters 17 are two filters connected in parallel, and a differential pressure transmitter 18 is installed on the connection line of the two filters 17. After the two filters 17 are connected in parallel, the two filters are one by one, so that resources are saved, and when one filter 17 is damaged, the other filter can be started for use, thereby avoiding the shutdown of the whole system and affecting the efficiency.
The air inlet of the aerator 3 is provided with a flowmeter 19 and a pressure sensor 110 in sequence; a liquid switch valve 111 is arranged at the liquid outlet of the liquid accumulation cavity 2; a liquid level control valve 112 is arranged at the liquid outlet of the liquid recovery cavity 82, and a liquid level meter 113 connected with the liquid level control valve 112 is arranged at the top of the ozone catalytic oxidation tower 8; the exhaust port of the ozone catalytic oxidation tower 8 is provided with a pressure gauge 114 and a gas switch valve 115.
The integrated system overcomes the defects of the traditional ozone oxidation technology, and has the advantages of high contact probability of ozone and malodorous gas, high ozone utilization rate and good pollutant removal effect; the cyclone aerator is utilized to fully dissolve malodorous gas in the liquid in the effusion cavity, the malodorous gas is converted from gas phase to liquid phase, and the malodorous gas is conveyed to the gas-liquid reaction tower for multistage treatment and then discharged after advanced oxidation treatment by the ozone catalytic oxidation tower.
Ozone and waste gas absorption liquid are combined to generate micro-bubble forms through an ozone catalytic oxidation tower, so that the ozone oxidation effect is enhanced, the ozone consumption is reduced, the residence time is shortened, and the problems of low treatment efficiency, high cost and the like of the traditional waste gas treatment process are solved;
the liquid can be recycled, so that the liquid is distributed more uniformly on the surface of the catalyst, resources are saved, when the waste gas absorption liquid flows from the ozone catalyst filling layer to the liquid recovery cavity at the bottom of the ozone catalytic oxidation tower, the waste gas absorption liquid is conveyed to the emulsifying layer of the reaction tower body through the liquid circulation pipeline, the waste gas treatment quality is improved, and the problem that the traditional waste gas treatment process wastes resources is solved;
compared with the traditional microorganism decomposition method or activated carbon adsorption method treatment device, the treatment efficiency of the malodorous gas is about 65-75%, the treatment efficiency of the malodorous gas after-treatment combined with a plurality of technologies such as malodorous gas form conversion can be improved to more than 95%, and the treatment efficiency of the malodorous gas is greatly improved;
further, this embodiment has improved the structure of current gas-liquid reaction tower that is used for malodorous gas to handle, in reaction tower body 1, carries out the quaternary processing to malodorous gas, has promoted treatment effeciency and treatment effect greatly, and has reduced treatment cost, specifically:
firstly, the external waste gas is exposed into the liquid of the effusion chamber 2 through the aerator 3, so that the liquid of the exposed waste gas is conveyed into the external ozone catalytic oxidation tower 8, and is oxidized by ozone, so that ozone water dissolved with ozone and a part of undissolved ozone gas are formed, and the waste gas is treated for the first time;
then, ozone water and ozone gas enter the emulsion layer 9 in the reaction tower body 1 together, and in the aeration process of the bottom of the reaction tower body 1, waste gas which is not exposed in the liquid accumulation cavity 2 continuously rises into the gas-liquid mixing device 4, so that the rising waste gas and the ozone water falling in the emulsion layer 9 fully contact and carry out emulsion reaction in the gas-liquid mixing device 4, so that emulsion is formed, and flows into the liquid accumulation cavity 2 again under the action of gravity, and is discharged into an external ozone catalytic oxidizer for cyclic oxidation treatment, wherein the waste gas is treated for the second time;
the exhaust gas discharged from the gas-liquid mixing device 4 rises again to pass through the spraying device 5, and the spraying device 5 is connected with external spraying liquid, in this embodiment, the spraying liquid is set as an oxidizing agent, so that the exhaust gas can be oxidized again, and the exhaust gas is treated for the third time; it should be noted that, the second treatment is a circulation treatment mode, after the first and second oxidation treatments, the toxic and harmful substances of the exhaust gas are basically oxidized, so the spraying device 5 in this embodiment can be used as a standby device, when the body quantity of the waste gas exposed at the bottom is too large, the first and second oxidation treatments are not thorough, at this time, the spraying device 5 can be started to spray and oxidize the exhaust gas, thereby ensuring more thorough treatment, achieving the purpose of saving energy and avoiding waste of resources, and the third treatment of the exhaust gas is performed here;
the waste gas after the tertiary oxidation treatment continues to rise to the defoaming decomposition device 6, firstly, foam and impurities in the waste gas are removed by the folded plate defoaming layer 61, and after the foam and impurities are removed, only nontoxic and harmless gas and a part of ozone basically remain in the waste gas, at the moment, the ozone can be further decomposed when passing through the catalytic decomposition layer 62, so that the waste gas is ensured to be nontoxic and harmless gas, and finally, the waste gas is discharged from the negative pressure fan 7, and the waste gas is treated for the fourth time.
In conclusion, toxic and harmful substances in the waste gas can be thoroughly removed through four treatments on the waste gas, so that the waste gas reaches the emission standard, and the waste gas treatment device has the advantages of simple structural design, high waste gas treatment efficiency and effect, low cost and contribution to popularization.
Further, in this embodiment, the liquid in the effusion cell 2 is water.
Further, referring to fig. 3, the aerator 3 is configured as a cyclone aerator, the cyclone aerator includes a cyclone air duct 31 for conveying waste gas, and a plurality of cyclone aeration heads 32 for aerating the waste gas into the liquid in the effusion cavity 2 are installed on the cyclone air duct 31, so as to improve the aeration effect.
Further, referring to fig. 4 and 5, the gas-liquid mixing device 4 includes a plurality of cyclone tubes 41 arranged in parallel, and spiral flow channels for the exhaust gas to flow through are provided inside the cyclone tubes 41. When the waste gas passes through the gas-liquid mixing device 4, as the flow channel of the waste gas is a spiral flow channel, the flowing time and the flowing path of the waste gas can be increased, so that the waste gas can be fully contacted and fused with the liquid falling above to form emulsion, and the emulsion is more thorough.
Further, a guiding column 42 is coaxially disposed inside the cyclone tube 41, a plurality of cyclone blades 43 are sequentially mounted on the guiding column 42 along the length direction thereof, a spiral flow channel through which the waste gas flows is formed between a plurality of the cyclone blades 43, and the waste gas can spiral rise along the guiding of the cyclone blades 43 after entering the cyclone tube 41, thereby fully contacting with the liquid.
Further, the spraying device 5 comprises a spraying pipe communicated with external spraying liquid, a plurality of spraying heads used for spraying the spraying liquid are arranged on the spraying pipe, the spraying liquid is set to be hydrogen peroxide, and the hydrogen peroxide is selected to perform effective oxidation treatment on the waste gas, so that the waste gas is thoroughly treated.
Further, the defoaming decomposition apparatus 6 includes a folded plate defoaming layer 61 for defoaming and a catalytic decomposition layer 62 for catalytic decomposition of ozone.
Further, a plurality of foam removing flaps arranged in parallel are installed in the foam removing layer 61 of the folded plate, gaps between two adjacent foam removing flaps form a flow passage for the waste gas to flow through, and the flow passage is arranged in a curved shape. In this embodiment, through the clearance between the defoaming folded plate that a plurality of flat type were arranged, constitute the runner of waste gas, and the runner is curved design, can promote the dwell time at folded plate defoaming layer 61 of waste gas, can also promote the area of contact of waste gas and defoaming folded plate to improve the removal effect of foam.
Further, the catalytic decomposition layer 62 is filled with a plurality of wires, and the wires are made of manganese oxide. In this embodiment, the screen structure firstly can filter waste gas, secondly, because the waste gas contains ozone, set up the screen structure as the manganese oxide material, can carry out oxidative decomposition to the ozone in the waste gas to promote the treatment effect of waste gas, make the exhaust waste gas nontoxic harmless.
Further, a gas equalizing layer 10 for uniformly raising the waste gas is further provided between the aerator 3 and the gas-liquid mixing device 4, and since a certain force is generated in the process of aerating the waste gas by the aerator 3, the raising of the waste gas can be buffered by adding a gas equalizing layer 10 between the aerator 3 and the gas-liquid mixing device 4, so that the waste gas uniformly and stably enters the gas-liquid mixing device 4 to be fully contacted and mixed with the liquid falling above.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (9)
1. The malodorous gas treatment system is characterized by comprising a gas-liquid reaction tower and an ozone advanced treatment device;
the gas-liquid reaction tower comprises a reaction tower body, wherein a liquid accumulation cavity and an aerator for aerating external waste gas into liquid in the liquid accumulation cavity are arranged at the bottom of the reaction tower body; the upper part of the aerator is sequentially provided with a gas-liquid mixing device for emulsifying waste gas overflowed due to the fact that liquid in the liquid accumulation cavity reaches a saturated dissolution absorption state, a spraying device for spraying the waste gas, a foam removal decomposition device for removing foam in the waste gas and decomposing ozone, and a negative pressure fan for discharging the waste gas out of the reaction tower body;
the ozone advanced treatment device comprises an ozone catalytic oxidation tower, an ozone catalyst filling layer for catalyzing ozone is arranged in the ozone catalytic oxidation tower, and a liquid recovery cavity is arranged at the bottom of the ozone catalyst filling layer; the ozone catalyst filling layer is connected with a liquid outlet of the effusion cavity through a liquid recovery pipeline; an ejector for adding ozone into the pipeline is arranged on the liquid recovery pipeline;
the liquid outlet of the liquid recovery cavity is connected with a liquid circulation pipeline, the exhaust port of the ozone catalytic oxidation tower is connected with a gas circulation pipeline, and an emulsifying layer communicated with the liquid circulation pipeline and the gas circulation pipeline is arranged between the spraying device and the gas-liquid mixing device; the liquid circulation pipeline is provided with a micro-bubble generator for generating bubbles of liquid in the liquid circulation pipeline;
the aerator is arranged as a rotational flow type aerator, the rotational flow type aerator comprises a rotational flow air guide pipe used for conveying waste gas, and a plurality of rotational flow aeration heads used for aerating the waste gas into liquid in the effusion cavity are arranged on the rotational flow air guide pipe.
2. The malodorous gas treatment system according to claim 1, wherein the gas-liquid mixing device comprises a plurality of swirl tubes arranged in parallel, and spiral flow channels for the exhaust gas to flow through are arranged inside the swirl tubes.
3. The malodorous gas treatment system according to claim 1, wherein the spraying device comprises a spraying pipe communicated with external spraying liquid, a plurality of spraying heads for spraying the spraying liquid are installed on the spraying pipe, and the spraying liquid is hydrogen peroxide.
4. The malodorous gas treatment system according to claim 1, wherein the defoaming decomposition device comprises a folded plate defoaming layer for defoaming, and a catalytic decomposition layer for catalytic decomposition of ozone.
5. The malodorous gas treatment system according to claim 4, wherein a plurality of defoaming flaps arranged in parallel are installed in the defoaming layer of the flaps, the gap between two adjacent defoaming flaps forms a flow passage for the waste gas to flow through, and the flow passage is arranged in a curved shape.
6. The malodorous gas treatment system according to claim 4, wherein the catalytic decomposition layer is filled with a plurality of screens, and the screens are arranged in a screen structure made of manganese oxide material.
7. The malodorous gas treatment system according to claim 1, wherein a lift pump for transporting the liquid and a filter for filtering the liquid are sequentially installed between the liquid outlet of the liquid accumulation chamber and the ejector.
8. The malodorous gas treatment system according to claim 7, wherein the filter is provided as two filters connected in parallel, the two filters are provided one by one, and a differential pressure transmitter is installed on the connection line of the two filters.
9. The malodorous gas treatment system according to claim 1, wherein the air inlet of the aerator is provided with a flow meter and a pressure sensor in sequence; a liquid switch valve is arranged at the liquid outlet of the liquid accumulation cavity; a liquid level control valve is arranged at the liquid outlet of the liquid recovery cavity, and a liquid level meter connected with the liquid level control valve is arranged at the top of the ozone catalytic oxidation tower; the exhaust port of the ozone catalytic oxidation tower is provided with a pressure gauge and a gas switch valve.
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