Ozone and ultraviolet photocatalytic oxidation VOCs treatment equipment

Abstract

The invention relates to the technical field of VOCs waste gas purification, in particular to ozone and ultraviolet photocatalytic oxidation VOCs treatment equipment which comprises a gas collection device, a primary treatment device and a secondary treatment device. The secondary treatment device comprises an ozone generator, a gas mixing chamber and a catalysis chamber; a plurality of layers of catalytic plates which are arranged in the horizontal direction are arranged in the catalytic chamber, and ultraviolet lamp tubes and catalyst beds are arranged on the catalytic plates at intervals; and the ultraviolet lamp tubes or the catalyst beds of the two adjacent layers of catalytic plates are arranged in a crossed manner. The catalyst chamber has the beneficial effects that the catalyst chamber is composed of a plurality of groups of convex-plate-shaped catalyst plates, airflow is baffled in the catalyst chamber, sufficient contact between reactants and a catalyst is ensured, and meanwhile, airflow disturbance reduces local concentration and over-high temperature. The ultraviolet light tubes are arranged in each layer and keep a reasonable distance from the catalyst, so that the illumination area is increased, the problem of light attenuation when the bed layer is relatively thick is avoided, and meanwhile, later maintenance is also facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of VOCs waste gas purification, and in particular to ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment. Background Art

[0002] Volatile Organic Compounds (VOCs) are volatile organic compounds, including hydrocarbons, ketones, etc., which are widely present in paints and solvents. They can irritate the respiratory tract, and long-term exposure may cause headaches, dizziness, and increase the risk of asthma and certain cancers.

[0003] Mobile operations within the factory, such as industrial painting, welding operations, breathing valve emissions from oil storage tanks, and even emergency treatment of assembly line leaks, cannot be equipped with special treatment equipment due to the particularity of their locations and operating methods. The VOCs generated by workers during operation will be directly breathed into the human body, causing health hazards. Because local exhaust gas cannot be properly treated, it will eventually form unorganized emissions, which will accumulate in the limited space of the factory, eventually causing secondary damage to the human body, or even cumulative damage. The current treatment technology for unorganized exhaust gas emissions from non-fixed points mainly uses natural wind to dilute the concentration, and workers wear masks to deal with it. Therefore, it is urgent to develop an integrated mobile small-scale VOCs treatment equipment to treat unorganized exhaust gas emissions from non-fixed points.

[0004] The treatment technology for VOCs has been developed and mature, mainly including adsorption, catalysis, biological methods, etc. The catalytic method can be divided into photocatalysis, electrocatalysis, thermal catalysis, etc. according to the different media. In view of the current mobile small-scale treatment equipment, the present invention selects ozone oxidation coupled with ultraviolet photocatalysis technology to avoid the heat treatment generated by electrocatalysis and thermal catalysis, thereby reducing energy consumption costs. In addition, ozone is a strong oxidant. When combined with ultraviolet photocatalysis, it can not only improve the oxidation efficiency, but also more effectively mineralize difficult-to-degrade VOCs. At the same time, it has good adaptability and broad spectrum to a variety of organic pollutants.

[0005] For example, in patent application CN218636948U "A Mobile Exhaust Gas Treatment Equipment", solid particles are only pre-treated by setting a filter screen in the collection hood, which is not applicable to certain operating scenarios with large amounts of dust. Therefore, in order to address this problem, not only a filter screen is set in the gas collection hood, but also a dust removal filter cartridge is set in the primary treatment device. The hydrophobic polytetrafluoroethylene (PTFE) film filter material is used, which can not only filter solid particles, but also perform preliminary dehumidification, effectively preventing solid particles and moisture from affecting the catalyst treatment effect of the subsequent secondary treatment device.

[0006] For example, patent application CN114904386A "Organic waste gas treatment device and method of use thereof" buries the ultraviolet lamp tube deep in activated carbon, which easily leads to light energy attenuation, heat accumulation, and increases the difficulty of replacement. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device, which allows VOCs-containing gas to fully contact with a catalyst, maintains a reasonable distance between the ultraviolet light tube and the catalyst, and is also convenient for later maintenance.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: to provide an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device, comprising a shell and a gas collecting device, a primary treatment device and a secondary treatment device arranged in the shell according to the flow direction of the VOCs-containing gas: the gas collecting device is used to collect the VOCs-containing gas; the primary treatment device is used to remove dust from the VOCs-containing gas; The secondary treatment device comprises an ozone generator, a gas mixing chamber and a catalyst chamber; the VOCs-containing gas after dust removal by the primary treatment device flows into the gas mixing chamber through a one-way exhaust gas pipe, and the ozone generator is connected to the gas mixing chamber through an ozone one-way delivery pipe; the gas outlet of the gas mixing chamber is connected to the catalyst chamber; the catalyst chamber is provided with a plurality of catalytic plates arranged horizontally, and ultraviolet lamps and catalyst beds are arranged at intervals on the catalytic plates; the ultraviolet lamps or catalyst beds of two adjacent layers of catalytic plates are arranged crosswise; the lower end of the catalyst chamber is connected to the exhaust pipe.

[0009] The beneficial effects of the present invention are as follows: the catalyst chamber of the present invention is composed of multiple groups of convex plate-shaped catalyst plates, and the airflow is deflected in the catalyst chamber to ensure that the reactants are fully in contact with the catalyst, while the airflow disturbance reduces the occurrence of local concentration and excessive temperature. Each layer is equipped with an ultraviolet light tube, and a reasonable distance is maintained from the catalyst, which not only increases the illumination area and avoids the problem of light attenuation when the bed is thick, but also facilitates later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device according to a specific embodiment of the present invention; Figure 2 It is a schematic structural diagram of a porous cyclone fan of an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device according to a specific embodiment of the present invention; Figure 3 It is a schematic structural diagram of a catalytic plate of an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device according to a specific embodiment of the present invention; Description of labels: 1. Gas collecting device; 11. Gas collecting hood; 12. Primary filter screen; 13. Handle; 14. Universal bamboo tube; 15. Gas collecting hood support frame; 2. primary treatment device; 21. porous swirl fan; 211. circular porous plate; 212. blade; 22. Dust filter cartridge; 23. Pulse solenoid valve; 24. Venturi nozzle; 25. Conical ash hopper; 3. Secondary treatment device; 31. Ozone generator; 32. Gas mixing chamber; 33. Catalytic chamber; 34. Catalytic plate; 341. Ultraviolet lamp; 342. Catalyst bed. DETAILED DESCRIPTION

[0011] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0012] The present invention provides an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device, comprising a shell and a gas collecting device, a primary treatment device and a secondary treatment device arranged in the shell according to the flow direction of the VOCs-containing gas: the gas collecting device is used to collect the VOCs-containing gas; the primary treatment device is used to remove dust from the VOCs-containing gas; The secondary treatment device comprises an ozone generator, a gas mixing chamber and a catalyst chamber; the VOCs-containing gas after dust removal by the primary treatment device flows into the gas mixing chamber through a one-way exhaust gas pipe, and the ozone generator is connected to the gas mixing chamber through an ozone one-way delivery pipe; the gas outlet of the gas mixing chamber is connected to the catalyst chamber; the catalyst chamber is provided with a plurality of catalytic plates arranged horizontally, and ultraviolet lamps and catalyst beds are arranged at intervals on the catalytic plates; the ultraviolet lamps or catalyst beds of two adjacent layers of catalytic plates are arranged crosswise; the lower end of the catalyst chamber is connected to the exhaust pipe.

[0013] As can be seen from the above description, the beneficial effects of the present invention are: the catalyst chamber of the present invention is composed of multiple groups of convex plate-shaped catalyst plates, and the airflow is deflected in the catalyst chamber to ensure that the reactants are fully in contact with the catalyst, while the airflow disturbance reduces the occurrence of local concentration and excessive temperature. Each layer is equipped with an ultraviolet light tube, and a reasonable distance is maintained from the catalyst, which not only increases the illumination area and avoids the problem of light attenuation when the bed is thick, but also facilitates later maintenance.

[0014] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, the primary treatment device includes a primary treatment chamber and a porous cyclone fan arranged in the primary treatment chamber, a dust removal filter cartridge and a conical ash hopper arranged below the dust removal filter cartridge; The porous swirl fan is arranged on the air inlet of the primary processing chamber; the porous swirl fan comprises a circular porous plate and blades rotatably connected to the circular porous plate through bearings.

[0015] As can be seen from the above description, the porous swirl fan can reduce the impact of the center flow velocity on the center of the swirl plate. The outer blades rotate freely under the action of fluid power to disperse the airflow. Compared with the traditional porous plate, the porous swirl fan greatly reduces the fan energy loss caused by the airflow impacting the porous plate, and promotes the rotation and mixing of the airflow. In addition, a power recovery device is designed to recover the kinetic energy generated by the automatic rotation under the action of wind and convert it into electrical energy.

[0016] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, the opening rate of the circular porous plate is 30%-35%, and the circular porous plate is provided with a small hole with a diameter of 1 mm in the center and a medium hole with a diameter of 2 mm on the periphery.

[0017] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, the dust removal filter cartridge is vertically arranged, and the number of the dust removal filter cartridges arranged is 4.

[0018] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, the filter material of the dust removal filter cartridge adopts a PTFE coating with a microporous structure, and the pore size is 0.1-0.5 microns.

[0019] From the above description, we can know that PTFE has the advantages of high temperature resistance, corrosion resistance, good air permeability, etc. The hydrophobicity and oleophobicity of the material also make it difficult for dust to adhere to the surface of the filter membrane when the coated filter cartridge handles wet dust or oily dust, making it easy to clean. Solid particles are deposited on the surface of the filter material under the action of Brownian diffusion and microporous filtration, and the treated gas passes through the filter material into the clean air chamber in the center of the filter cartridge. The airflow direction is upward, and then enters the secondary treatment device.

[0020] Furthermore, in the above-mentioned ozone and ultraviolet photocatalytic oxidation VOCs treatment equipment, the catalytic chamber includes a first catalytic plate and a second catalytic plate from top to bottom; the first catalytic plate has a catalyst bed in the middle and ultraviolet lamps on both sides; the second catalytic plate has an ultraviolet lamp in the middle and catalyst beds on both sides.

[0021] From the above description, it can be seen that the three-stage cross-distribution of the catalytic plate is conducive to the internal deflection of the airflow, ensuring sufficient contact between the reactants and the catalyst, and avoiding the occurrence of excessive local concentration and temperature.

[0022] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, the catalytic plate is slidably connected to the side wall of the catalytic chamber through a linear slide rail.

[0023] From the above description, it can be seen that the catalyst plate and the slot of the catalyst chamber form a front-to-back push-pull connection relationship, which is convenient for later catalyst replacement, ultraviolet lamp maintenance, etc.

[0024] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, a fan is provided on the exhaust pipe.

[0025] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, a VOCs detection sensor is provided on the exhaust pipe.

[0026] From the above description, it can be seen that the VOCs detection sensor is used to alarm when the outlet exhaust gas reaches 90% of the standard threshold set by the system.

[0027] Furthermore, in the above-mentioned ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, universal wheels are provided at the bottom of the shell.

[0028] As can be seen from the above description, universal wheels are provided at the bottom of the shell to facilitate the movement of the integrated ozone and ultraviolet photocatalytic oxidation VOCs treatment equipment of the present application.

[0029] Embodiment 1 Please refer to Figure 1 , Figure 2 and Figure 3 , an ozone and ultraviolet light photocatalytic oxidation VOCs treatment device, comprising a shell and a gas collecting device 1, a primary treatment device 2 and a secondary treatment device 3 arranged in the shell according to the flow direction of the VOCs-containing gas: the gas collecting device 1 is used to collect the VOCs-containing gas; The primary treatment device 2 is used to remove dust from VOCs-containing gases; the primary treatment device 2 includes a primary treatment chamber and a porous cyclone fan 21, a dust filter cartridge 22, and a conical ash hopper 25 arranged below the dust filter cartridge 22; the porous cyclone fan 21 is arranged on the air inlet of the primary treatment chamber; the porous cyclone fan includes a circular porous plate 211 and blades 212 rotatably connected to the circular porous plate 211 through bearings. The opening rate of the circular porous plate 211 is 30%-35%, and the circular porous plate 211 is provided with a small hole with a diameter of 1mm in the center and a medium hole with a diameter of 2mm on the periphery. The dust filter cartridge 22 is arranged vertically, and the number of the dust filter cartridges 22 is 4. The filter material of the dust filter cartridge 22 adopts a PTFE coating with a microporous structure, and the pore size is 0.1-0.5 microns.

[0030] The secondary treatment device 3 includes an ozone generator 31, a gas mixing chamber 32 and a catalyst chamber 33; the VOCs-containing gas after dust removal from the primary treatment device 2 flows into the gas mixing chamber 32 through the exhaust gas one-way pipe, and the ozone generator 31 is connected to the gas mixing chamber 32 through the ozone one-way delivery pipe; the gas outlet of the gas mixing chamber 32 is connected to the catalyst chamber 33; The catalyst chamber 33 is provided with multiple layers of catalyst plates 34 arranged in a horizontal direction, and the catalyst plates 34 are provided with ultraviolet lamps 341 and catalyst beds 342 at intervals; the ultraviolet lamps 341 or catalyst beds 342 of two adjacent layers of catalyst plates 34 are arranged crosswise; the catalyst chamber 33 includes a first catalyst plate 34 and a second catalyst plate 34 from top to bottom; the first catalyst plate 34 has a catalyst bed 342 in the middle and ultraviolet lamps 341 on both sides; the second catalyst plate 34 has an ultraviolet lamp 341 in the middle and catalyst beds 342 on both sides. The catalyst plates 34 are slidably connected to the side walls of the catalyst chamber 33 through linear slide rails.

[0031] The lower end of the catalytic chamber 33 is connected to an exhaust pipe. A fan is provided on the exhaust pipe.

[0032] Specific: 1. Gas collecting device 1 The gas collecting device 1 is mainly composed of a gas collecting hood 11, a gas collecting pipeline, and a gas collecting hood support frame 15, and is used for exhaust gas collection and primary filtration.

[0033] The gas hood is made of stainless steel and is designed in a horseshoe shape. The edge of the hood is extended by 4-6cm to reduce the inhalation of invalid airflow. The opening angle is 110°-120°. The connection between the gas hood and the fixed end is cast in a rounded chamfered form to reduce the resistance of the edges to the airflow. At the same time, the connection is provided with a primary filter grid 12 to prevent large materials from being sucked into the purification system. The fixed end of the gas hood is designed with a handle 13 to facilitate the operator to move according to the working conditions. The fixed end of the gas hood is connected to the gas collection pipe in a threaded manner, and sealant is used to prevent gas leakage. The threaded connection method is convenient for replacing different types of gas collection hoods according to the working conditions. The gas collection pipe adopts a support-free universal bamboo tube 14, which is made of polyoxymethylene resin (POM) and has an inner diameter of 200mm. The exhaust wind speed is adjusted by an automatic control system, and there are 1234 wind speed gears. The larger the number, the greater the wind speed.

[0034] The specific use method is to use the handle 13 to move the gas collection hood, aim at the pollution center, and make the air suction direction consistent with the pollution airflow direction as much as possible to make full use of the initial kinetic energy of the pollution airflow. The exhaust gas is collected by the gas collection system and enters the primary treatment device 2. When the equipment is moved or idle, the gas collection hood can be placed on the support frame on the top of the box body to facilitate movement and save space.

[0035] (2) Primary treatment device 2 The primary treatment device 2 is mainly composed of a porous cyclone fan 21, a dust removal filter cartridge 22, a pulse solenoid valve 23 and a conical ash hopper 25. The waste gas is pre-treated to mainly remove solid particles and moisture in the gas to protect the operation of subsequent treatment units. Or as a separate dust removal device, the power supply of the ultraviolet lamp 341 in the ozone generating chamber and the catalyst chamber 33 is turned off through the intelligent control system, and the catalyst chamber 33 is used only as a gas delivery channel. In addition, the removed solid particles are collected and temporarily stored in the conical ash hopper 25 under the filter cartridge, which is convenient for the centralized and unified recycling and treatment of hazardous waste.

[0036] The gas enters the primary treatment device 2 in the form of side air intake. In order to avoid the wear of the filter material and uneven airflow distribution caused by excessive airflow at the center of the inlet, which in turn leads to a decrease in dust removal efficiency, a porous swirl fan 21 is set at the entrance of the primary treatment device 2. The porous swirl fan 21 is composed of a central circular porous plate 211 and an annular blade 212 connected in a bearing manner. The circular porous plate 211 is made of stainless steel with an opening rate of 30%-35%. A 1mm small hole is arranged in the center and a 2mm medium hole is arranged on the periphery to reduce the impact of the central flow velocity on the center of the swirl plate. The peripheral blades 212 rotate freely under the action of fluid power to disperse the airflow. Compared with the traditional porous plate, the porous swirl fan 21 greatly reduces the fan energy loss caused by the airflow impacting the porous plate, and promotes the rotation and mixing of the airflow. In addition, a power recovery device is designed to recover the kinetic energy generated by the automatic rotation under the action of wind and convert it into electrical energy.

[0037] Under the action of the porous cyclone fan 21, the exhaust gas is evenly distributed. Under the action of the dust removal filter cartridge 22 blocking, the solid particles adhere to the outer wall of the filter cartridge. The filter material is coated with a microporous PTFE membrane with a pore size of 0.1-0.5 microns. PTFE has the advantages of high temperature resistance, corrosion resistance, and good air permeability. The hydrophobicity and oleophobicity of the material also make it difficult for the coated filter cartridge to adhere to the surface of the filter membrane when dealing with wet dust or oily dust, which is convenient for cleaning. Solid particles are deposited on the surface of the filter material under the action of Brownian diffusion, microporous screening, etc., and the treated gas passes through the filter material into the clean air chamber in the center of the filter cartridge. The airflow direction is upward, and then enters the secondary treatment device 3. Four dust removal filter cartridges 22 are provided in the primary treatment device 2. The filter cartridges are vertically evenly distributed in the primary treatment chamber, and the filter cartridge outlet is fixed to the top partition with a rotating lock. The dust removal efficiency of the primary treatment device 2 can reach 99%, and the dehumidification efficiency is 97%. The VOCs detection sensor is arranged at the air inlet of the primary treatment device 2.

[0038] As time goes by, the dust on the filter bag becomes thicker and the resistance increases. At this time, the pulse controller sends a signal to control the venturi nozzle 24 to spray high-pressure air source through the pulse solenoid valve 23, causing the filter cartridge to expand rapidly and cause impact vibration, shaking the solid particles adsorbed on the surface of the filter material into the conical ash hopper 25 below. The conical ash hopper 25 uses gravity inertia to accumulate dust at the bottom, and then collects the dust in the bag through the ash discharge valve. Compared with the traditional dust collection drawer in small mobile processing equipment, the conical ash hopper 25 avoids secondary dust pollution during the collection process and can be directly bagged.

[0039] (3) Secondary treatment device 3 (ozone photocatalysis) The secondary treatment device 3 is mainly composed of an ozone generator 31, an ultraviolet lamp 341, and a catalyst. After primary treatment and purification, the exhaust gas enters the ultraviolet catalytic chamber 33 with ozone, and VOCs are degraded under the catalytic oxidation of O3 / UV and the catalyst. The catalyst catalytically treats single-component or multi-component VOCs. The catalyst can be a transition metal catalyst. The catalyst carrier can be activated carbon, alumina, molecular sieve, titanium dioxide, carbon fiber, ceramic, etc.

[0040] Ozone is generated by an ozone generating chamber, which is located above the primary treatment device 2. A fresh air inlet with a diameter of 15 cm is provided on the upper wall. The inlet is equipped with a baffle assembly for adjusting the air outlet and an air filter located at the rear side thereof. The ozone generator 31 adopts thyristor inverter technology, and generates ozone by a steep electric field discharge. The discharge chamber is composed of a dehydroxylated quartz structure tubular generator.

[0041] The ozone one-way delivery pipe and the exhaust gas one-way pipe are connected to the gas mixer above the catalyst chamber 33. The exhaust gas and ozone are mixed and enter the catalyst chamber 33, where they undergo catalytic oxidation with the catalyst in the bed layer, and VOCs are degraded into non-toxic gases. The catalyst chamber 33 is provided with a multi-layer three-stage ultraviolet lamp tube 341 and a catalyst combination plate frame. The plate frame uses the slot guide rails on the left and right sides of the catalyst chamber 33 to form a front-to-back push-pull relationship with the wall surface, which is convenient for later catalyst replacement and lamp maintenance.

[0042] A baffle is provided above the ultraviolet lamp, and the exhaust gas can only enter the next layer through the catalyst bed. The three-stage catalyst of each layer is cross-arranged with the ultraviolet lamp arrangement area. For example, the first layer has a catalyst bed 342 in the middle and ultraviolet lamp tubes 341 on both sides, and the arrangement of the next bed layer is a central ultraviolet lamp tube 341 and catalyst beds on both sides. The three-stage cross-distribution is conducive to the internal deflection of the airflow, ensuring that the reactants are in full contact with the catalyst and avoiding the occurrence of local concentrations and excessive temperatures. Ultraviolet light tubes are provided in each layer and are kept at a reasonable distance from the catalyst, which not only increases the illumination area and avoids the problem of light attenuation when the bed is thicker, but also facilitates later maintenance. Finally, after the exhaust gas is catalytically degraded by O3 / UV, it is discharged outward under the action of the fan gravity of the exhaust pipe. The VOCs detection sensor is arranged at the exhaust port of the catalyst chamber 33.

[0043] (4) Exhaust emission system After the treated exhaust gas meets the emission standards, it is safely discharged into the atmosphere through the exhaust port to avoid secondary pollution of the exhaust gas.

[0044] (5) Control system It includes sensors, instruments, automatic control systems, and PLC touch screens, which are used to monitor and control the operating status of the equipment and the exhaust gas treatment effect in real time. The control unit is fixed on the treatment box door of the upper right mixing cylinder. The control system uses sensors set in each module to monitor exhaust gas concentration, intake volume, adsorption, catalytic temperature, pressure and other parameters in real time online, and displays the values ​​on the display screen. When the outlet exhaust gas reaches 90% of the standard threshold set by the system, an alarm prompts.

[0045] (6) Box structure: The box is made of cold-rolled steel plate. The bottom of the box is equipped with universal casters, which can be moved freely. The equipment can be fixed by locking the front wheels. The box door is set in the front, and each reaction chamber is designed as a module with a left-opening box door. Sound insulation cotton is arranged inside the box to reduce noise.

[0046] In summary, the ozone and ultraviolet photocatalytic oxidation VOCs treatment equipment of the present invention enters the subsequent process through the gas collection hood and the universal bamboo tube under the action of the fan gravity; the air inlet of the primary treatment device is provided with a porous cyclone gas distribution plate, and the system is also provided with a filter cartridge to perform primary dust removal and dehumidification on the exhaust gas, and then collect the solid waste through a conical ash hopper; the secondary treatment device is a catalyst chamber composed of multiple groups of three-stage ultraviolet lamps and a catalyst bed combined plate frame. Ozone is generated by the ozone generation chamber, and enters the catalyst chamber after being mixed with the exhaust gas treated by the primary treatment device in the mixer. The exhaust gas is discharged after ozone + ultraviolet photocatalytic oxidation; the monitoring and control system is mainly for concentration monitoring and power adjustment of some processors, such as using sensors to monitor the inlet and outlet VOCs concentration, and also by controlling the fan speed, ozone generator and ultraviolet lamp power to adjust the gear of the relevant units. The use of dust removal, dehumidification and ozone photocatalysis system can not only be used for dust removal and material collection, but also directly degrade VOCs, meet emission standards, and avoid secondary pollution. In addition, its mobile design allows the equipment to be quickly deployed near the pollution source to achieve on-site treatment and reduce the spread of pollutants.

[0047] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment, characterized in that: It comprises a shell and a gas collecting device, a primary treatment device and a secondary treatment device arranged in the shell according to the flow direction of the VOCs-containing gas: the gas collecting device is used to collect the VOCs-containing gas; the primary treatment device is used to remove dust from the VOCs-containing gas; The secondary treatment device comprises an ozone generator, a gas mixing chamber and a catalyst chamber; the VOCs-containing gas after dust removal by the primary treatment device flows into the gas mixing chamber through a one-way exhaust gas pipe, and the ozone generator is connected to the gas mixing chamber through an ozone one-way delivery pipe; the gas outlet of the gas mixing chamber is connected to the catalyst chamber; the catalyst chamber is provided with a plurality of catalytic plates arranged horizontally, and ultraviolet lamps and catalyst beds are arranged at intervals on the catalytic plates; the ultraviolet lamps or catalyst beds of two adjacent layers of catalytic plates are arranged crosswise; the lower end of the catalyst chamber is connected to the exhaust pipe.

2. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: The primary treatment device comprises a primary treatment chamber, a porous cyclone fan arranged in the primary treatment chamber, a dust removal filter cartridge, and a conical ash hopper arranged below the dust removal filter cartridge; The porous swirl fan is arranged on the air inlet of the primary processing chamber; the porous swirl fan comprises a circular porous plate and blades rotatably connected to the circular porous plate through bearings.

3. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 2 is characterized in that: The circular porous plate has an opening rate of 30%-35%, and a small hole with a diameter of 1 mm is arranged in the center of the circular porous plate, and a medium hole with a diameter of 2 mm is arranged on the periphery.

4. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 2 is characterized in that: The dust removal filter cartridges are arranged vertically, and the number of the dust removal filter cartridges arranged is 4.

5. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 2 is characterized in that: The filter material of the dust removal filter cartridge adopts a PTFE film with a microporous structure, and the pore size is 0.1-0.5 microns.

6. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 2 is characterized in that: The catalyst chamber includes a first catalyst plate and a second catalyst plate from top to bottom in sequence; The first catalytic plate has a catalyst bed in the middle and ultraviolet lamps on both sides; the second catalytic plate has an ultraviolet lamp in the middle and catalyst beds on both sides.

7. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 2 is characterized in that: The catalytic plate is slidably connected to the side wall of the catalytic chamber through a linear slide rail.

8. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: The exhaust pipe is provided with a fan.

9. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 1, characterized in that: The exhaust pipe is provided with a VOCs detection sensor.

10. The ozone and ultraviolet light photocatalytic oxidation VOCs treatment equipment according to claim 1, characterized in that: The bottom of the shell is provided with universal wheels.

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