CN207628198U - Organic waste gas treatment device - Google Patents

Abstract

The utility model provides an organic waste gas treatment device, which includes a reaction chamber, the two ends of the reaction chamber along the left and right directions are respectively provided with an air inlet and an exhaust port, and the reaction chamber is exhausted along the air inlet. The direction of the mouth separates three reaction sections, which are connected in sequence, the photooxidation section, the ozone catalytic oxidation section and the biological trickling filtration section. The organic waste gas treatment device adopts the coupling method of photooxidation and biodegradation to treat organic waste gas, which improves the efficiency of organic waste gas treatment and realizes advanced treatment, avoiding the low mineralization degree of organic pollutants that occurs when VOCs organic waste gas is treated by a single technology. The problem of some toxic organic small molecule intermediates has the characteristics of being suitable for most industrial VOCs organic waste gas treatment, which is conducive to solving the current urgent air pollution problem in our country.

Description

Organic waste gas treatment device

technical field

The utility model relates to the technical field of air pollution control. Specifically, the utility model relates to a waste gas treatment device, in particular to an organic waste gas treatment device for treating VOCs.

Background technique

At present, regional air pollution problems characterized by fine particulate matter (PM2.5) occur frequently in my country. Studies have shown that volatile organic compounds (Volatile Organic Compounds, VOCs) in organic waste gas are an important leading factor for the formation of PM2.5. Promoting the treatment of organic waste gas, especially VOCs, is very conducive to solving the current urgent air pollution problem in my country.

The types of VOCs include alkanes, alkenes, benzene series, halogenated hydrocarbons, aldehydes, ketones, alkyd esters, organic amines, organic sulfur, etc. VOCs have the largest emission and have caused serious pollution to the environment. At present, industrial VOCs waste gas treatment technologies are still dominated by traditional single technologies such as adsorption, absorption, catalytic combustion, or biological methods. The disadvantages are magnified, and it is difficult to achieve satisfactory results technically and economically. For example, the adsorption method needs to frequently replace or regenerate the adsorbent, and the adsorbate is often difficult to recover or has no recovery value, and the operation and maintenance costs are high; the absorption method mostly uses water, acid-base or non-polar mineral oil as the absorption solution, and the equipment is easy to corrode , the absorption of waste liquid needs to be regenerated or treated, otherwise there will be problems such as secondary pollution, the process is complicated and the cost is high; catalytic combustion technology often uses noble metals as catalysts, but the catalysts are easy to deactivate, and additional The heat is used to maintain the combustion of the system; the biological method is inefficient when dealing with VOCs waste gas with high concentration or containing alkanes and halogenated hydrocarbons, which are poorly water-soluble, have certain biological toxicity, and are difficult to biodegrade.

In recent years, emerging advanced oxidation technologies such as Fenton oxidation, photooxidation, and plasma have begun to enter the field of VOCs waste gas treatment. Among them, the photocatalytic oxidation technology is a photooxidation technology that can generate hydroxyl radicals (OH·), superoxygen (O ₂ ^- ·) and other molecules with strong oxidation activity under the conditions of ultraviolet rays and catalysts in lower energy bands. It has the characteristics of mild reaction and rapid oxidation of pollutants. However, the photocatalyst is easily deactivated, and the photolysis efficiency decreases after the UV lamp is fouled. Under the action of a strong oxidizing system, the macromolecular VOCs are easily broken or ring-opened to form aldehydes, ketones, acids or esters with low mineralization. , some toxic small molecule intermediates, and ozone (O ₃ ) by-products in the tail gas after treatment with specific wavelengths of ultraviolet light. These problems restrict the application and promotion of photocatalytic oxidation technology in the field of VOCs treatment.

Practice has proved that a single VOCs waste gas treatment technology can no longer meet the increasingly stringent emission standards. The organic coupling of a single technology has developed a new type of combined VOCs treatment technology that is cost-effective and widely applicable, which has great application prospects.

Utility model content

The purpose of this utility model is to provide an organic waste gas treatment device with a simple structure, which integrates photo-oxidation and biodegradation treatment methods, first oxidizes and then degrades, thereby improving the treatment efficiency and purification rate of organic waste gas and meeting the emission standards.

In order to achieve the above object, the utility model provides the following technical solutions:

An organic waste gas treatment device, comprising a reaction chamber, the two ends of the reaction chamber along the left and right directions are respectively provided with an air inlet and an exhaust port, and the inside of the reaction chamber is separated along the direction from the air inlet to the exhaust port. The photooxidation section, the ozone catalytic oxidation section and the biological trickling filtration section are connected in sequence to three reaction sections. Wherein, the photo-oxidation section is used to form a (UV)/O ₃ /OH·photo-oxidation system in it, so as to have a fast chain reaction with organic waste gas; the ozone catalytic oxidation section is used to generate Under the action of _O3 , the organic waste gas treated in the photooxidation section is catalytically oxidized; the biological trickling filter section is used to degrade the organic waste gas treated in the ozone catalytic oxidation section, and the degraded gas is discharged through the exhaust port.

Preferably, a partition is provided between two adjacent reaction sections, the front and rear sides of the partition are connected to the inner wall of the cavity, and only one side of the partition of the adjacent reaction section is connected to the cavity alternately.

Preferably, the photooxidation section is provided with an ultraviolet lamp assembly for providing ultraviolet rays, and the ultraviolet lamp assembly includes a lamp tube bracket fixed on the top of the photooxidation section, an ultraviolet lamp installed on the lamp tube bracket, and Glass sleeve around lamp perimeter.

Further, the photooxidation section is also provided with a spray mechanism, and the spray liquid of the spray mechanism flows through the ultraviolet lamp to react with oxygen in the air under the action of the ultraviolet lamp to form (UV)/ O ₃ /OH·photooxidation system; at the same time, the spray mechanism can also wash away the scale on the ultraviolet lamp to ensure the light transmittance of the ultraviolet lamp.

Preferably, the spray mechanism includes a spray pipe, an atomizing nozzle installed on the spray pipe and used to atomize the spray liquid, a humidity sensor used to detect the humidity in the photooxidation section, and an electrical connection with the humidity sensor. A humidity controller connected to control the opening or closing of the atomizing nozzle according to the detection result of the humidity sensor.

Preferably, the ozone catalytic oxidation section includes a catalytic packing support frame arranged in the lower area and used to support the catalytic packing and a catalytic oxidation area arranged above the packing support frame and filled with catalytic packing, and the catalytic packing is loaded with useful Catalysts for the oxidation of ozone.

Preferably, the bio-trickling filter section includes a water distribution area, a biodegradation area, and an air outlet area arranged from bottom to top, the water distribution area is provided with a biological filler support frame for supporting biological fillers, and the degradation area The heap is filled with biological fillers, the gas outlet area is provided with a nutrient solution spraying mechanism for spraying nutrient solution to the biodegradation area, and the exhaust port is opened at the top of the gas outlet area.

Further, the left and right ends of the reaction chamber are respectively provided with drain ports at the bottom, and the liquid drain ports are provided with a liquid seal section for preventing gas from escaping.

Further, the top of the reaction chamber is provided with an inspection entrance corresponding to each of the three reaction sections, so as to facilitate repair and maintenance by staff.

Compared with the prior art, the solution of the utility model has the following advantages:

1. The organic waste gas treatment device of the present utility model organically combines the components of a single treatment method, organically couples photooxidation treatment and biological treatment, can improve the treatment efficiency of organic waste gas and improve the degree of purification, and avoids single-technology treatment of VOCs The organic pollutants that appear in the organic waste gas have a low degree of mineralization, and some toxic organic small molecule intermediates are produced. It has the characteristics of being suitable for most industrial VOCs organic waste gas treatment, which is conducive to solving the current urgent air pollution problem in my country.

Specifically, by setting up a photo-oxidation section, a (UV)/O ₃ /OH·photo-oxidation system is formed, and a rapid chain reaction occurs with organic waste gas; an ozone catalytic oxidation section is set up, and the ozone in the photo-oxidation section is used for catalytic oxidation with organic waste gas reaction, and deozone treatment; finally, the organic waste gas pretreated by the photooxidation section and the ozone catalytic oxidation section is degraded by the biological trickling filtration method, and finally turned into microbial cytoplasm and simple inorganic substances to achieve a higher purification effect. And eliminate the secondary pollution of ozone as much as possible.

2. In the organic waste gas treatment device of the present utility model, by setting a spray mechanism in the photooxidation section, the air humidity in the reaction section can be controlled to ensure the normal formation of (UV)/O ₃ /OH·photooxidation system and improve The ability of photooxidation to remove organic pollutants is improved, and there is no problem of photocatalyst deactivation; it can also wash away the fouling attached to the ultraviolet lamp components, delaying the problem of the reduction of photolysis efficiency after the fouling of the ultraviolet lamp.

3. Ozone catalytic oxidation is used as the intermediate process of VOCs treatment, which not only makes full use of the by-product ozone produced by photo-oxidation technology (λ=185nm) to strengthen the oxidation of VOCs, but also solves the problem of ozone inactivation of microorganisms and environmental pollution caused by escape. It also provides oxygenation conditions for subsequent biological advanced treatment and reduces the treatment load of some VOCs, which has become an important basic condition for the organic coupling of photooxidation and biological treatment technology.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

The above-mentioned and/or additional aspects and advantages of the utility model will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the perspective view of the organic waste gas treatment device of the present utility model;

Fig. 2 is an exploded view of the organic waste gas treatment device shown in Fig. 1 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be construed as limiting the present invention.

Referring to Fig. 1 and Fig. 2, the utility model relates to an organic waste gas treatment device 100, which uses photo-oxidation coupling biological method to treat organic waste gas, so as to improve the treatment efficiency and purification degree of organic waste gas.

Preferably, the organic waste gas treatment device 100 includes three reaction sections: a photooxidation section 13 , an ozone catalytic oxidation section 14 and a biotrickling filtration section 15 . Among them, the photooxidation section 13 is used to form (UV)/O ₃ /OH·photooxidation system therein, and undergoes a fast chain reaction with organic waste gas; the ozone catalytic oxidation section 14 is used for the ozone generated in the photooxidation section 13 Under the action of _O3 , the organic waste gas treated by the photooxidation section 13 is catalytically oxidized; the biological trickling filter section 15 is used to degrade the organic waste gas treated by the ozone catalytic oxidation section 14, and the degraded gas is exhausted Port 12 is discharged.

The organic waste gas treatment device 100 includes a reaction chamber 1 and a partition 16 disposed in the reaction chamber 1 . The reaction chamber 1 is provided with an air inlet 11 and an air outlet 12 at its left and right ends respectively. The partition 16 separates the reaction chamber 1 into a photooxidation section 13 , an ozone catalytic oxidation section 14 , and a biotrickling filter section 15 which are sequentially connected along the left and right directions. The air inlet 11 is arranged at the bottom of the photooxidation section 13, and is used to feed the organic waste gas to be treated into the reaction chamber 1; the exhaust outlet 12 is arranged at the top of the biological trickling filter section 15 , for discharging the gas treated by the organic waste gas treatment device 100 .

Preferably, the partition 16 is provided with two, which are arranged between two adjacent reaction sections, preferably, the partition 16 has a ventilation gap between the adjacent two reaction sections, and the two The ventilation gaps are distributed vertically and staggered, that is, the left and right sides of the two partitions 16 are connected to the reaction chamber 1 , and only one side of the upper and lower sides is connected to the reaction chamber 1 . Wherein, the bottom edge of the dividing plate 16 between the photooxidation section 13 and the ozone catalytic oxidation section 14 is connected with the reaction chamber 1, and the upper edge of the dividing plate 16 between the ozone catalytic oxidation section 14 and the biological trickling filtration section 15 is connected with the reaction chamber. Body 1 is connected to form three relatively airtight reaction sections. The term “relatively airtight” here means that the gas can and can only flow to the next reaction section from the ventilation gap defined by the partition 16, so as to ensure the treatment efficiency and treatment effect of the organic waste gas in each reaction section.

When the organic waste gas treatment device 100 of the present utility model works, the organic waste gas enters the photooxidation section 13 from the air inlet 11, and enters the ozone catalytic oxidation section 14 through the partition plate 16 between the photooxidation section 13 and the ozone catalytic oxidation section 14, Then it enters the biotrickling filter section 15 through the partition plate 16 between the ozone catalytic oxidation section 14 and the biotrickling filter section 15 , and finally discharges from the exhaust port 12 at the top of the biotrickling filter section 15 .

Preferably, the photo-oxidation section 13 is composed of an air intake area 130 located in the lower area and a photo-oxidation area 131 located above the air intake area 130 . The bottom end of the inlet area 130 communicates with the inlet 11, and the VOCs waste gas to be treated enters the reactor through the inlet 11. The photooxidation area 131 is provided with an ultraviolet lamp assembly 132 for providing ultraviolet rays.

The ultraviolet lamp assembly 132 includes a lamp tube bracket 1321 fixed on the top of the photooxidation zone 131, a plurality of ultraviolet lamps 1320 mounted on the lamp tube bracket 1321 in an array, and a glass sleeve set on the periphery of each ultraviolet lamp 1320 Tube.

In the photooxidation zone 131 of the photooxidation section 13, there are multiple groups evenly arranged in an array, such as six groups of ultraviolet lamps 1320, specifically, two groups of ultraviolet lamps 1320 are arranged at a distance of 25 mm in a single layer, and three layers of ultraviolet lamps are arranged at a layer distance of 500 mm. 1320. The ultraviolet lamp 1320 can emit a characteristic spectrum with a wavelength of 185nm. The length of a single ultraviolet lamp 1320 is 436mm, the tube diameter is 15mm, the power is 23W, and the ultraviolet intensity at 1m is 65μW·cm ^-2 .

At a wavelength of 185nm, oxygen and water vapor in the air can be continuously excited to generate ozone (O ₃ ) and hydroxyl radicals (OH·) under the irradiation of ultraviolet rays, and then form a fast chain reaction with most VOCs exhaust gases , Ultraviolet (UV)/O ₃ /OH·photooxidation system for non-selective oxidation and photolysis of harmful substances. Among them, the generation mechanism of ozone (O ₃ ) and hydroxyl radical (OH·) is as follows:

Preferably, the glass sleeve is a quartz glass sleeve 1322 for protecting the lamp tube of the ultraviolet lamp 1320 , specifically, the ultraviolet lamp 1320 is integrally housed in the quartz glass sleeve 1322 . The ultraviolet transmittance of the quartz glass sleeve 1322 is greater than or equal to 90%, so that the ultraviolet light emitted by the ultraviolet lamp 1320 can pass through the tube wall of the quartz glass sleeve 1322 and fill the photooxidation area 131 when it is powered on.

It should be understood that the ultraviolet lamp assembly 132 also has an electronic ballast corresponding to each ultraviolet lamp tube, which has the function of stabilizing the operating current of the ultraviolet lamp 1320 . In other embodiments, the number of the ultraviolet lamps 1320 and their fixed positions in the photo-oxidation area 131 can be set according to actual needs.

Since there are still particles in the organic waste gas, they are easy to adhere to the quartz glass sleeve 1322 to reduce the transmittance of ultraviolet rays. In order to delay the problem of the reduction of photolysis efficiency after the fouling of the ultraviolet lamp, preferably, the photooxidation section 13 is also provided with a spray mechanism, and the spray liquid of the spray mechanism flows through the quartz glass on the periphery of the ultraviolet lamp 1320 Casing 1322. The spray liquid of the spraying mechanism flows through the quartz glass casing 1322 of the ultraviolet lamp 1320, on the one hand, it can wash away the fouling on the outside of the quartz glass casing 1322, and on the other hand, the air in the photooxidation zone 131 can be increased by spraying. Humidity, so as to ensure that there is enough water vapor in the photo-oxidation zone 131 to form a (UV)/O ₃ /OH·photo-oxidation system.

Preferably, the upper limit of humidity in the photo-oxidation zone 131 is 80-85%, and the lower limit of humidity is 60-65%. Preferably, the spray mechanism includes a spray pipe 1331, an atomizing nozzle 1330 installed on the spray pipe 1331 and used to atomize the spray liquid, and a humidity sensor (not shown) for detecting the humidity in the photooxidation section 13. label), and a humidity controller 1332 that is electrically connected to the humidity sensor to control the opening or closing of the atomizing nozzle according to the detection result of the humidity sensor. When the humidity in the photooxidation zone 131 is lower than the lower limit, the atomizing nozzle 1330 starts spraying and humidifying; when the humidity in the photooxidizing zone 131 reaches the upper limit, the atomizing nozzle 1330 stops spraying and humidifying. When spraying, part of the spray liquid will fall back to the inlet area 130 under the action of gravity, and be discharged from the reaction chamber 1 through the liquid outlet 19 at the bottom end of the inlet area 130 . In order to prevent waste gas from escaping from the liquid discharge port 19, the liquid discharge port 19 is provided with a liquid seal section.

During operation, the VOCs exhaust gas entering the reaction chamber 1 first realizes uniform gas distribution in the inlet area 130 of the photooxidation section 13, and then enters the photooxidation section 131 upwards to be photolyzed and converted into aldehydes and ketones by chain breaking or ring opening , acid or ester and other small molecular organic substances, or directly mineralized into CO ₂ , H ₂ O and other inorganic substances, the gas after photolysis treatment passes through the photooxidation section 13 and flows to the ozone catalytic oxidation section 14, and the gas phase adheres to The particles or aerosol impurities on the quartz glass sleeve 1322 will be washed and transferred to the gas inlet area 130 by the spray liquid.

The ozone catalytic oxidation section 14 is provided with a catalytic packing support frame 1401 and a catalytic oxidation area 141 . The packing support frame is located in the lower area 140 of the ozone catalytic oxidation section 14 and has the function of supporting and supporting the catalytic packing 1411 . The catalytic oxidation zone 141 is located in the central area of the ozone catalytic oxidation section 14 , and the catalytic oxidation zone 141 is filled with catalytic packing 1411 , and the catalytic packing 1411 is stacked on the catalytic packing support frame 1401 .

Because the gas flowing from the photooxidation section 13 to the ozone catalytic oxidation section 14 contains a certain concentration of ozone (O ₃ ), and ozone (O ₃ ) has a high oxidation potential, it is easy to diffuse through the microbial cell membrane, and can pass through the oxidizing microorganism Cellular organic matter or damage to the organic chain structure leading to cell death. In order to ensure that the subsequent biological energy can stably degrade the VOCs waste gas and avoid secondary pollution caused by the escape of ozone into the environment, it is necessary to deozone (O ₃ ) the gas before the biotrickling filter section 15. At the same time of deozonation, it is also considered to use the oxidizing property of ozone (O ₃ ) to further reduce the content of VOCs pollutants, and reduce part of the VOCs removal load for the biological trickling filter section 15.

Preferably, the catalytic packing 1411 of the catalytic oxidation zone 141 is one or more granular packings with a porous structure among activated carbon, zeolite and polyurethane foam, and the particle diameter is 5-20 mm. A catalyst for catalytic oxidation of ozone (O ₃ ) is loaded on the catalytic filler, and the catalyst is a metal oxide catalyst containing manganese (Mn), nickel (Ni), cobalt (Co) or iron (Fe).

Specifically, the partial reaction mechanism of catalytic oxidation of ozone (O ₃ ) to oxygen and generation of hydroxyl radicals (OH·) is as follows:

Me-OH ^- +O ₃ →Me-HO ₂ -+O ₂ (1);

Me-HO ₂ ^- +O ₃ →Me-O ₂ -+HO ₃ ⁰ (2);

HO ₃ ⁰ →OH·+O ₂ (3).

During operation, the VOCs gas containing ozone (O ₃ ) passes through the catalytic oxidation zone of the ozone catalytic oxidation section 14 from top to bottom, and while the ozone (O ₃ ) strengthens the oxidation of VOCs pollutants, it also interacts with the catalytic oxidation zone in the catalytic oxidation zone. The gas-solid phase catalytic reaction occurs on the filler, and finally ozone (O ₃ ) is catalytically decomposed into oxygen, and undergoes a coordination complex reaction with the catalyst to generate a certain amount of hydroxyl radicals (OH·), forming hydroxyl radicals (OH·) /O ₃ oxidizes VOCs pollutant system. Through the above reaction process, the gas from which ozone has been removed and supplemented with a certain concentration of oxygen flows to the biotrickling filter section 15 . Preferably, the ozone catalytic oxidation section 14 has an efficiency of removing ozone (O ₃ ) greater than or equal to 95%.

The bio-trickling filter section 15 is composed of a water distribution area 150 , a biodegradation area 151 and an air outlet area 152 from bottom to top. The water distribution area 150 is provided with a biological filler support frame 1501, and the biological filler support frame 1501 has the function of supporting and supporting the filler. The biodegradation area 151 is filled with biological fillers 1511, which are piled on the biological filler support frame 1501. The surface and micropores of the biological fillers 1511 grow with bacteria or filaments that have biological activity for degrading VOCs and are aerobic. Microorganisms dominated by fungi. The top end of the gas outlet area 152 communicates with the exhaust port 12 .

An atomizing nozzle 1520 is also provided in the gas outlet area 152, and the atomizing nozzle 1520 is installed on a spraying pipe 1521. The spraying pipe in the gas outlet area 152 and the atomizing nozzle together form a nutrient solution spraying mechanism. The atomizing nozzle 1520 regularly sprays the nutrient solution to the biodegradation zone 151 in an intermittent spraying manner. Part of the nutrient solution will fall back to the water distribution area 150 under the action of gravity, and the bottom end of the water distribution area 150 is provided with a liquid outlet 19 through which the nutrient solution can be discharged from the reaction chamber 1 .

In this embodiment, in order to promote the shedding and renewal of the aging biofilm in the biotrickling filter section 15 , a trace amount of ozone (O ₃ ) is allowed to enter the biotrickling filter section 15 .

During operation, after being pretreated by the photooxidation section 13 and the ozone catalytic oxidation section 14, the gas that does not contain ozone or a small amount of ozone but contains small molecule VOCs pollutants that have not been completely mineralized first passes through the water distribution area 150 of the biological trickling filter section 15. Evenly distribute gas in the gas phase, and then rise to the biodegradation zone 151. After the pre-oxidation treatment, the water solubility and biodegradability of the small molecule VOCs pollutants in the gas phase are improved, so the VOCs pollutants can be more quickly destroyed. The microorganisms inhabiting the biodegradation zone 151 are captured and utilized, and then degraded into microbial cytoplasm and simple inorganic substances, such as hydrocarbons and aldehydes are degraded into CO ₂ , H ₂ O, sulfur in organic sulfur The nitrogen element in the organic amines is converted into stable nitrate or nitrogen in the environment, and the finally purified gas is discharged from the exhaust port 12, and the biological metabolites and aging biofilms are removed The nutrient solution is flushed and transferred to the water distribution area 150, and discharged through the liquid outlet 19 of the reaction section. Preferably, the liquid discharge port 19 is provided with a liquid seal section to prevent VOCs exhaust gas from escaping in a short flow.

Preferably, the biological filler 1511 in the biodegradation zone 151 is one or more granular fillers with a porous structure among bamboo charcoal, ceramsite and coke, and the particle size is 10-30 mm.

Preferably, the nutrient solution contains N, P, Fe, and Mg elements, which are used to regulate the pH value and humidity in the biodegradation zone 151 and provide enhanced nutrient elements for microorganisms.

Preferably, in order to facilitate the repair and maintenance of the processing device 100 , the reaction chamber 1 is provided with at least one inspection entrance 18 at the top of each reaction section, for operators to enter the reaction chamber through the inspection entrance for operation.

In a specific application, the treatment device 100 is used to treat xylene organic waste gas that is common in industrial sources. The inlet concentration range of xylene organic waste gas in the application site is 1000-3000 mg/m ³ , which is a high-concentration VOCs waste gas. The processing air volume of the reaction chamber 1 is 100m ³ /h, and the reactor is a cuboid chamber structure with a total size of 930×400×2000mm (length×width×height, the same below), including the reaction chamber 1 and the air inlet 11 , Photooxidation section 13, ozone catalytic oxidation section 14, biological trickling filter section 15, exhaust port 12 and liquid discharge port 19. Among them, the size of the photooxidation section 13 is 80×400×2000 mm, the size of the ozone catalytic oxidation section 14 is 150×400×2000 mm, and the size of the biological trickling filter section 15 is 700×400×2000 mm. The total designed empty tower residence time is 20.1s, of which the photooxidation section 13 is 1.7s, the ozone catalytic oxidation section 14 is 3.2s, and the biological trickling filter section 15 is 15.1s.

In the photooxidation zone 131 of the photooxidation section 13, six groups of ultraviolet lamps 1320 are uniformly arranged in an array, specifically, groups of ultraviolet lamps 1320 are arranged in a single layer with a spacing of 25mm, and three layers of ultraviolet lamps 1320 are arranged with a spacing of 500mm. The ultraviolet lamp 1320 is provided with a quartz glass casing 1322 which has the function of protecting the lamp tube, and the ultraviolet lamp 1320 is entirely set in the quartz glass casing 1322 . The ultraviolet lamp 1320 can emit a characteristic spectrum with a wavelength of 185nm. The length of a single ultraviolet lamp 1320 is 436mm, the tube diameter is 15mm, the power is 23W, and the ultraviolet intensity at 1m is 65μW·cm ^-2 .

In the ozone catalytic oxidation section 14 , the effective height of the catalytic oxidation zone 141 is 1.5 m, and the catalytic oxidation zone is filled with catalytic fillers 1411 . The catalytic filler is an activated carbon granular filler with a particle diameter of 10 mm; the catalytic filler is loaded with a metal oxide catalyst containing MnO ₂ .

In the bio-trickling filter section 15 , the biodegradation zone 151 has an effective height of 1.5 m, and the biodegradation zone is filled with biological fillers 1511 . The biological filler is composed of bamboo charcoal and ceramsite layered at a volume ratio of 2:1, and its particle size is 20mm-30mm; the surface of the biological filler and the growth in the micropores have biological activity for degrading VOCs and are aerobic. bacteria-dominated microorganisms. The air outlet area of the biological trickling filter section 15 is provided with a spray pipe, and a plurality of atomizing nozzles 1520 are provided on the spray pipe 1521 . The atomizing nozzle regularly sprays the nutrient solution to the biodegradation area in an intermittent spraying manner, preferably, the flow rate of the nutrient solution is designed according to the liquid-gas ratio of 1.5-3, and sprays 1-3 to the biodegradation area per hour within 24h. 1.5min intermittent spray mode operation. The nutrient solution contains ammonium chloride (NH ₄ Cl), potassium dihydrogen phosphate (KH ₂ PO ₄ ), ferrous oxide (FeO), and magnesium oxide (MgO) components. Part of the nutrient solution will fall back to the water distribution area under the action of gravity, and then be discharged from the reaction chamber 1 through the liquid discharge port 19 .

The foregoing is only a partial implementation of the utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the utility model. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (9)

1. An organic waste gas treatment device is characterized by comprising a reaction cavity, wherein an air inlet and an air outlet are respectively formed in two ends of the reaction cavity along the left and right directions, and three reaction sections, namely a photo-oxidation section, an ozone catalytic oxidation section and a bio-trickling filter section, which are sequentially communicated are separated from the reaction cavity along the direction from the air inlet to the air outlet; wherein,

the photo-oxidation section is used for forming UV/O therein₃a/OH photo-oxidation system to perform a rapid chain reaction with organic waste gas; the ozone catalytic oxidation section is used for carrying out light irradiation under the action of O3 generated by the photooxidation sectionCarrying out catalytic oxidation treatment on the organic waste gas treated by the oxidation section to remove ozone;

the biological trickling filter section is used for degrading the organic waste gas treated by the ozone catalytic oxidation section and discharging the degraded gas through an exhaust port;

the photooxidation section is provided with an ultraviolet lamp assembly used for providing ultraviolet rays, and the ultraviolet lamp assembly comprises a lamp tube support fixed at the top of the photooxidation section, an ultraviolet lamp arranged on the lamp tube support and a glass sleeve sleeved on the periphery of the ultraviolet lamp.

2. The organic waste gas treatment device according to claim 1, wherein a partition plate is arranged between two adjacent reaction sections, the front and rear sides of the partition plate are connected with the inner wall of the cavity, and only the upper side and the lower side of the partition plate of the adjacent reaction section are connected with the cavity in a staggered manner.

3. The organic waste gas treatment device according to claim 1, wherein the photo-oxidation section is further provided with a spraying mechanism, and a spraying liquid of the spraying mechanism flows through the ultraviolet lamp.

4. The organic waste gas treatment device according to claim 3, wherein the spraying mechanism comprises a spraying pipe, an atomizing nozzle installed on the spraying pipe and used for atomizing the spraying liquid, a humidity sensor used for detecting the humidity in the light oxidation section, and a humidity controller electrically connected with the humidity sensor and used for controlling the atomizing nozzle to be opened or closed according to the detection result of the humidity sensor.

5. The organic waste gas treatment device of claim 1, wherein the ozone catalytic oxidation section comprises a catalytic filler support frame arranged in the lower region and used for supporting the catalytic filler, and a catalytic oxidation zone arranged above the filler support frame and filled with the catalytic filler.

6. The organic exhaust gas treatment device according to claim 5, wherein a catalyst for catalytically oxidizing ozone is supported on the catalytic filler.

7. The organic waste gas treatment device according to claim 1, wherein the bio-trickling filter section comprises a water distribution area, a biodegradation area and an air outlet area which are arranged from bottom to top, the water distribution area is provided with a biological filler support frame for supporting biological fillers, the degradation area is filled with the biological fillers in a stacking manner, the air outlet area is provided with a nutrient solution spraying mechanism for spraying nutrient solution to the biodegradation area, and the top end of the air outlet area is provided with the air outlet.

8. The organic waste gas treatment device according to claim 1, wherein the reaction chamber has a liquid outlet at the bottom of the reaction chamber, and the liquid outlet has a liquid seal section for preventing gas from escaping.

9. The organic waste gas treatment device of claim 1, wherein the top of the reaction cavity is provided with a maintenance inlet corresponding to each of the three reaction sections.