Purification device and method for normal-temperature catalytic oxidation of VOCs

Abstract

The invention relates to the technical field of waste gas purification, and provides a purification device and method for normal-temperature catalytic oxidation of VOCs (volatile organic compounds), the purification device comprises a device bottom plate and a second mounting frame, a protective side plate is welded and fixed on the device bottom plate, a fixed top plate is welded and fixed on the protective side plate, and a pretreatment assembly is mounted on the fixed top plate; an air guide pipe is fixedly welded to the fixed top plate, a flow dividing frame is fixedly welded to the bottom of the air guide pipe, flow dividing holes are formed in the bottom of the flow dividing frame in a penetrating mode, and an alternate catalysis assembly is installed on the protective side plate and comprises a first supporting plate and a second supporting plate; the first supporting plate and the second supporting plate are both welded and fixed to the protective side plate, and a protective frame is welded and fixed to the bottom end face of the second supporting plate. By means of the technical scheme, the problem that in the prior art, a purification device for catalytic oxidation of VOCs cannot conveniently and efficiently replace a catalyst used for a long time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification. Specifically, it relates to a purification device and method for catalytic oxidation of VOCs at normal temperature. Background Art

[0002] VOCs waste gas is waste gas containing volatile organic compounds, which is another important pollutant after SO2 and NOx, bringing a heavy burden to the environment and life. In China, VOCs have the characteristics of large emissions and complex sources. Industries such as painting, printing, and chemical industry have successively issued VOCs emission standards to reduce VOCs emissions. In order to purify VOCs, a catalytic oxidation device is generally used, that is, catalytic oxidation technology is used to remove VOCs, and VOCs are oxidized into harmless water and carbon dioxide under the action of a catalyst.

[0003] During the catalytic oxidation process, the active components of the catalyst may gradually decrease in content due to long-term contact with VOCs gas and reaction products, resulting in volatilization, dissolution, or being carried away by the gas flow, etc., which reduces the activity of the catalyst. In the actual working process of the existing catalytic oxidation VOCs purification device, when replacing the catalyst, it is necessary to stop the machine for a long time to complete the disassembly and replacement filling of the catalyst, with poor practicability and unable to replace the catalyst after long-term use conveniently and efficiently, thus reducing the working efficiency; and in the actual working process of the existing catalytic oxidation VOCs purification device, it is unable to perform self-cleaning pretreatment on VOCs waste gas, resulting in a large load on the subsequent catalytic oxidation of VOCs waste gas, thereby affecting the purification efficiency and purification effect of VOCs waste gas. Therefore, a purification device and method for catalytic oxidation of VOCs at normal temperature are needed to meet the needs of users. Summary of the Invention

[0004] The present invention provides a purification device and method for catalytic oxidation of VOCs at normal temperature, which solves the problems that the existing catalytic oxidation VOCs purification device cannot replace the catalyst after long-term use conveniently and efficiently, and cannot perform self-cleaning pretreatment on VOCs waste gas.

[0005] The technical solution of the present invention is as follows:

[0006] A purification device for catalytic oxidation of VOCs at normal temperature, comprising a device bottom plate and a second installation frame. A protective side plate is welded and fixed on the device bottom plate, and a fixed top plate is welded and fixed on the protective side plate. A pretreatment component is installed on the fixed top plate, and a guide air pipe is welded and fixed on the fixed top plate. A flow splitting frame is welded and fixed at the bottom of the guide air pipe, and flow splitting holes are penetrated and opened at the bottom of the flow splitting frame. An alternating catalytic component is installed on the protective side plate. The alternating catalytic component includes a first support plate and a second support plate, both of which are welded and fixed on the protective side plate. A protective frame is welded and fixed on the bottom end surface of the second support plate, and a first servo motor is welded and fixed on the bottom end surface of the protective frame. A turntable is welded and fixed on the output shaft of the first servo motor, and a limiting plate and a guide rod are welded and fixed on the turntable. A guide shaft is rotatably connected to the second support plate, and a guide plate and a center plate are welded and fixed on the guide shaft. A guide groove is opened on the guide plate, and a ventilation cylinder is welded and fixed on the center plate.

[0007] As a preferred solution of the present invention, wherein: the pretreatment component includes a first installation frame, the first installation frame is welded and fixed on the top end surface of the fixed top plate, a first fixed pipe is fixedly connected to the top of the first installation frame, a second fixed pipe is connected to the top of the first fixed pipe, an air pump is flange-connected to the second fixed pipe, a guide fan blade is rotatably connected by a bearing in the first fixed pipe, a driven shaft is welded and fixed on the guide fan blade, a rubber rod is fixedly connected to the bottom end of the driven shaft, the driven shaft is fixed in the middle of the rubber rod, and the length of the rubber rod is greater than the length of the first installation frame.

[0008] As a preferred solution of the present invention, wherein: a first through groove is penetrated and opened on the first installation frame, a filter screen plate, a moisture removal mesh plate and a metal mesh plate are slidably connected in a limited manner in the first through groove, a collection groove is opened on the filter screen plate, a connecting plate is welded and fixed on the first installation frame, a first spring is welded and fixed on the connecting plate, a clamping rod is welded and fixed on the first spring, and an ultraviolet lamp tube is installed in the first installation frame.

[0009] As a preferred solution of the present invention, wherein: the filter screen plate, the moisture removal mesh plate and the metal mesh plate are symmetrically distributed on both sides inside the first installation frame, connecting plates are fixedly connected to the filter screen plate, the moisture removal mesh plate and the metal mesh plate, clamping grooves are penetrated and opened on the connecting plates, the top end surface of the filter screen plate is attached to the bottom end surface of the rubber rod, and a photocatalyst is uniformly coated on the metal mesh plate.

[0010] As a preferred solution of the present invention, wherein: the flow splitting holes are distributed at equal angles at the bottom of the flow splitting frame, there are two ventilation cylinders, the two ventilation cylinders are symmetrically distributed on both sides of the center plate, there are four guide grooves, the four guide grooves are distributed at equal angles on the guide plate, and the side end surface of the guide plate is arc-shaped.

[0011] As a preferred embodiment of the present invention, the following is provided: a limiting groove is formed in the ventilation cylinder, a limiting block is connected in the limiting groove in a limiting and sliding manner, a placement wire frame is welded and fixed on the limiting block, the limiting grooves are symmetrically distributed on both sides of the ventilation cylinder, the limiting grooves correspond to the limiting blocks one by one, and a transition metal catalyst is uniformly filled in the placement wire frame.

[0012] As a preferred embodiment of the present invention, the following is provided: a base is welded and fixed at the central part of the bottom of the placement wire frame, a push plate is welded and fixed at the bottom end of the base, a second spring is welded and fixed in the push plate, a top rod is welded and fixed on the second spring, the top rod is slidably connected in the push plate, a fixed rod is welded and fixed in the ventilation cylinder, a third spring is welded and fixed on the bottom end surface of the push plate, a through hole is formed through the second support plate, the second springs are symmetrically distributed on both sides inside the push plate, the second springs correspond to the top rod and the fixed rod one by one, a sliding rod is connected in the fixed rod in a limiting and sliding manner, the cross section of the end of the top rod is in a right trapezoid shape, the top of the fixed rod is in an inclined shape, and the cross section of the top of the sliding rod is in an isosceles triangle shape.

[0013] As a preferred embodiment of the present invention, the following is provided: a second through groove is formed through the second installation frame, an activated carbon mesh plate is connected in the second through groove in a limiting and sliding manner, a magnetic cover plate is fixedly connected to the activated carbon mesh plate, the activated carbon mesh plates are symmetrically distributed on both sides inside the second installation frame, the activated carbon mesh plates correspond to the magnetic cover plates one by one, a heat insulation box is welded and fixed at the bottom end of the second installation frame, and a collection box is welded and fixed at the bottom end of the heat insulation box.

[0014] As a preferred embodiment of the present invention, the following is provided: a second servo motor is welded and fixed on the bottom end surface of the collection box, a drive shaft is connected to the output end of the second servo motor, a sealing plate is welded and fixed on the drive shaft, the sealing plate is rotatably connected to the heat insulation box through a sealing bearing, a heat conduction pipe is welded and fixed on the sealing plate, the sealing plates are symmetrically distributed on the upper and lower sides of the heat insulation box, and the heat conduction pipes are distributed at equal angles on the sealing plate.

[0015] A purification method for catalytic oxidation of VOCs at normal temperature includes the following steps:

[0016] S1: Connect the pretreatment component to the exhaust pipe of the industrial equipment, and perform pretreatment such as filtering, dehumidifying, and photocatalytic decomposition on the high-temperature VOCs exhaust gas;

[0017] S2: After the VOCs exhaust gas is pretreated, it passes through the transition metal catalyst in the alternating catalytic component, and under the action of the catalyst, the high-temperature VOCs exhaust gas is oxidized and decomposed into carbon dioxide and water at normal temperature;

[0018] S3: secondary adsorption purification through activated carbon mesh plate to further remove possible by-products;

[0019] S4: High-temperature VOCs waste gas heats the water in the insulation box through the heat pipe. The heated water can be transported to the heat exchange equipment for heat energy recovery and utilization. The purified gas can be discharged stably through the exhaust pipe.

[0020] The working principle and beneficial effects of the present invention are:

[0021] 1. The present invention is provided with a pretreatment component, which can filter and dehumidify VOCs waste gas through the filter plate and the dehumidification mesh plate, remove particulate matter, dust, etc. in the waste gas, prevent catalyst clogging, and reduce the humidity of the waste gas to avoid the catalyst from being deactivated by moisture; at the same time, the photocatalyst coated on the metal mesh plate can decompose part of VOCs in cooperation with the ultraviolet lamp, reduce the load of subsequent catalytic oxidation, reduce the energy consumption of catalytic oxidation, and improve the effect and efficiency of purification treatment; and in the process of waste gas transportation, the guide fan blade and the driven shaft can drive the rubber rod to rotate automatically, and then the dust and impurities filtered by the filter plate can be moved to the collection tank for automatic collection, so as to avoid clogging of the filter plate during long-term operation and affect the filtering effect, and through the cooperation of the clamping rod and the clamping slot, the disassembly, assembly and replacement of the filter plate, the dehumidification mesh plate and the metal mesh plate can be completed conveniently and efficiently, so as to ensure the convenience of subsequent cleaning and replacement work and avoid affecting the purification efficiency of VOCs waste gas.

[0022] 2. The present invention is provided with an alternating catalytic assembly. Under the continuous rotation of the guide rod, the guide plate and the guide groove can drive the ventilators on both sides of the center plate to switch positions automatically and stably, so that the catalyst can be replaced efficiently, which makes up for the defect that the existing catalytic oxidation VOCs purification device needs to be shut down for a long time to complete the replacement and filling of the catalyst. The staff has enough time to disassemble and install the replaced placement frame, so as to evenly replace and fill the catalyst in the placement frame; and by utilizing the cooperation between the top rod, the fixed rod and the sliding rod, the staff only needs to press repeatedly to realize the engagement, installation and disassembly of the placement frame, which further improves the convenience and efficiency of the catalyst replacement work, and effectively improves the working efficiency of the purification device.

[0023] 3. The present invention is provided with a diversion frame and diversion holes. With the cooperation of the diversion frame and the diversion holes, the exhaust gas can be automatically and evenly diverted, thereby ensuring that the VOCs in the exhaust gas can evenly contact the catalyst placed in various places inside the mesh frame, thereby improving the efficiency and effect of the catalytic oxidation work.

[0024] 4. The present invention is provided with an activated carbon mesh plate, which can perform secondary adsorption and purification on the exhaust gas of catalytic oxidation, further removing possible by-products, and the activated carbon mesh plate can be conveniently replaced through a magnetic cover plate.

[0025] 5. The present invention is provided with a heat insulation box and a collection box. The second servo motor can drive each heat conduction pipe on the sealing plate to rotate stably through a drive shaft, thereby being able to uniformly heat the water in the heat insulation box. And under the heat exchange principle, the water vapor generated by the catalytic oxidation of high-temperature exhaust gas can form condensed water and be automatically collected in the collection box; and the heated water can be transported to a heat exchange device for heat energy recovery and utilization to improve energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the connection structure of the device bottom plate and the protective side plate of the present invention;

[0029] Figure 3 is a schematic diagram of the connection structure of the first mounting frame and the ultraviolet lamp tube of the present invention;

[0030] Figure 4 is a schematic diagram of the connection structure of the driven shaft and the rubber rod of the present invention;

[0031] Figure 5 is a schematic diagram of the connection structure of the first support plate and the ventilation tube of the present invention;

[0032] Figure 6 is the present invention Figure 5 magnified schematic diagram of part A;

[0033] Figure 7 is the present invention Figure 5 magnified schematic diagram of part B;

[0034] Figure 8 is a schematic diagram of the connection structure of the guide shaft and the guide plate of the present invention;

[0035] Figure 9 is a schematic diagram of the connection structure of the activated carbon mesh plate and the magnetic cover plate of the present invention;

[0036] Figure 10 is a schematic diagram of the connection structure of the sealing plate and the heat conduction pipe of the present invention;

[0037] Figure 11 is a schematic diagram of the connection structure of the heat insulation box and the collection box of the present invention;

[0038] Figure 12 It is a schematic diagram of the connection structure between the assembly groove and the rubber plate of the present invention;

[0039] Figure 13 It is a schematic diagram of the connection structure between the first fixed pipe and the diversion fan blade of the present invention.

[0040] In the figure: 1. Device bottom plate; 2. Protective side plate; 3. Fixed top plate; 4. Pretreatment component; 401. First installation frame; 402. First fixed pipe; 403. Second fixed pipe; 404. Air pump; 405. First through groove; 406. Filter screen plate; 407. Dehumidification net plate; 408. Metal net plate; 409. Collection tank; 410. Connection plate; 411. Card slot; 412. Connection plate; 413. First spring; 414. Card rod; 415. Ultraviolet lamp tube; 416. Diversion fan blade; 417. Driven shaft; 418. Rubber rod; 5. Air duct; 6. Shunt frame; 7. Shunt hole; 8. Alternating catalytic component; 801. First support plate; 802. Second support plate; 803. Protective frame; 804. First servo motor; 805. Turntable; 806. Limit plate; 807. Guide rod; 808. Guide shaft; 809. Guide plate; 810. Guide groove; 811. Center plate; 812. Ventilation cylinder; 813. Limit groove; 814. Limit block; 815. Placing net frame; 816. Grabbing rod; 817. Base; 818. Push plate; 819. Second spring; 820. Thrust rod; 821. Fixed rod; 822. Slide rod; 823. Third spring; 824. Through hole; 825. Assembly groove; 826. Rubber plate; 9. Second installation frame; 10. Second through groove; 11. Activated carbon net plate; 12. Magnetic cover plate; 13. Heat insulation box; 14. Collection box; 15. Second servo motor; 16. Drive shaft; 17. Sealing plate; 18. Heat conduction pipe; 19. Water inlet pipe; 20. Drain pipe; 21. Exhaust pipe; 22. Feeding pipe. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0042] Embodiment 1

[0043] As Figures 1 to 13As shown in the figure, this embodiment proposes a purification device for catalytic oxidation of VOCs at normal temperature, which includes a device bottom plate 1 and a second installation frame 9. A protective side plate 2 is welded and fixed on the device bottom plate 1, a fixed top plate 3 is welded and fixed on the protective side plate 2, a pretreatment component 4 is installed on the fixed top plate 3, a gas guide pipe 5 is welded and fixed on the fixed top plate 3, a flow splitting frame 6 is welded and fixed at the bottom of the gas guide pipe 5, a flow splitting hole 7 is formed through the bottom of the flow splitting frame 6, and an alternating catalytic component 8 is installed on the protective side plate 2. The alternating catalytic component 8 includes a first support plate 801 and a second support plate 802. Both the first support plate 801 and the second support plate 802 are welded and fixed on the protective side plate 2. A protective frame 803 is welded and fixed on the bottom end surface of the second support plate 802, a first servo motor 804 is welded and fixed on the bottom end surface of the protective frame 803, a turntable 805 is welded and fixed on the output shaft of the first servo motor 804, a limiting plate 806 and a guide rod 807 are welded and fixed on the turntable 805, a guide shaft 808 is rotatably connected to the second support plate 802, a guide plate 809 and a central plate 811 are welded and fixed on the guide shaft 808, a guide groove 810 is formed in the guide plate 809, and a ventilation cylinder 812 is welded and fixed on the central plate 811. Through the pretreatment component 4, the VOCs waste gas can be filtered and dehumidified, and at the same time, part of the VOCs can be decomposed, reducing the load of subsequent catalytic oxidation, lowering the energy consumption of catalytic oxidation, and improving the effect and efficiency of purification treatment. And combined with the alternating catalytic component 8, the catalyst can be efficiently replaced, making up for the defect that the existing purification device for catalytic oxidation of VOCs needs to be shut down for a long time to complete the replacement and filling of the catalyst, and effectively improving the working efficiency of the purification device.

[0044] Embodiment 2

[0045] As Figures 1 to 13 shown, based on the same concept as the above Embodiment 1, this embodiment also proposes a purification device for catalytic oxidation of VOCs at normal temperature.

[0046] In this embodiment, the pretreatment component 4 includes a first mounting frame 401, the first mounting frame 401 is welded and fixed on the top surface of the fixed top plate 3, a first fixed pipe 402 is fixedly connected to the top of the first mounting frame 401, a second fixed pipe 403 is connected to the top of the first fixed pipe 402, an air pump 404 is flange-connected to the second fixed pipe 403, a guide fan blade 416 is rotationally connected to the first fixed pipe 402 through a bearing, a driven shaft 417 is welded and fixed on the guide fan blade 416, a rubber rod 418 is fixedly connected to the bottom end of the driven shaft 417, the driven shaft 417 is fixed in the middle of the rubber rod 418, the length of the rubber rod 418 is greater than the length of the first mounting frame 401, a first through groove 405 is formed through the first mounting frame 401, a filter screen plate 406, a dehumidification screen plate 407 and a metal screen plate 408 are connected in a limited sliding manner in the first through groove 405, a collection groove 409 is formed in the filter screen plate 406, a connecting plate 412 is welded and fixed on the first mounting frame 401, a first spring 413 is welded and fixed on the connecting plate 412, a clamping rod 414 is welded and fixed on the first spring 413, the clamping rod 414 is connected in a sliding manner through the connecting plate 412, an ultraviolet lamp tube 415 is installed in the first mounting frame 401. During the process of waste gas transportation, the guide fan blade 416 and the driven shaft 417 can drive the rubber rod 418 to rotate automatically, so as to be able to dial the dust and impurities filtered by the filter screen plate 406 into the collection groove 409 for automatic collection, avoiding the blockage of the filter screen plate 406 during long-term operation and affecting the filtering effect.

[0047] In this embodiment, the filter screen plate 406, the dehumidification screen plate 407 and the metal screen plate 408 are symmetrically distributed on both sides inside the first mounting frame 401, the filter screen plates 406, the dehumidification screen plates 407 and the metal screen plates 408 on both sides are mutually attached, connecting plates 410 are fixedly connected to the filter screen plate 406, the dehumidification screen plate 407 and the metal screen plate 408, clamping grooves 411 are formed through the connecting plates 410, the clamping rod 414 is clamped and connected in the clamping grooves 411, the top surface of the filter screen plate 406 is attached to the bottom end surface of the rubber rod 418, the connecting plates 410, the filter screen plate 406, the dehumidification screen plate 407 and the metal screen plate 408 have the same thickness, and a photocatalyst is uniformly coated on the metal screen plate 408. Through the cooperation of the clamping rod 414 and the clamping grooves 411, the disassembly and replacement of the filter screen plate 406, the dehumidification screen plate 407 and the metal screen plate 408 can be completed conveniently and efficiently, ensuring the convenience of its subsequent cleaning and replacement work and avoiding affecting the purification efficiency of VOCs waste gas.

[0048] In this embodiment, the bottom end surface of the flow dividing frame 6 is flush with the bottom end surface of the first support plate 801. The flow dividing holes 7 are evenly distributed at the bottom of the flow dividing frame 6. There are two ventilation cylinders 812, and the two ventilation cylinders 812 are symmetrically distributed on both sides of the central plate 811. The guiding shaft 808 is fixed at the central part of the central plate 811. The ventilation cylinders 812 are in mutual contact with the first support plate 801 and the second support plate 802. There are four guiding grooves 810, and the four guiding grooves 810 are evenly distributed on the guiding plate 809. The side end surface of the guiding plate 809 is arc-shaped, and the side end surface of the guiding plate 809 is in contact with the limiting plate 806. Under the continuous rotation of the guiding rod 807, through the guiding plate 809 and the guiding grooves 810, the ventilation cylinders 812 on both sides of the central plate 811 can be driven to perform automatic and stable position switching, and thus the catalyst can be replaced efficiently, making up for the defect that the existing purification device for catalytic oxidation of VOCs needs to be shut down for a long time to complete the replacement and filling of the catalyst.

[0049] In this embodiment, a limiting groove 813 is formed in the ventilation cylinder 812. A limiting block 814 is connected in a limiting and sliding manner in the limiting groove 813. A placing mesh frame 815 is welded and fixed on the limiting block 814. The placing mesh frame 815 is in contact with the inner wall of the ventilation cylinder 812. The limiting grooves 813 are symmetrically distributed on both sides of the ventilation cylinder 812, and the limiting grooves 813 correspond to the limiting blocks 814 one by one. The placing mesh frame 815 is evenly filled with a transition metal catalyst. A grasping rod 816 is welded and fixed at the central part inside the placing mesh frame 815. The length of the grasping rod 816 is greater than the depth of the placing mesh frame 815. A base 817 is welded and fixed at the central part of the bottom of the placing mesh frame 815. A push plate 818 is welded and fixed at the bottom end of the base 817. A second spring 819 is welded and fixed inside the push plate 818. A top rod 820 is welded and fixed on the second spring 819. The top rod 820 is slidably connected inside the push plate 818. A fixing rod 821 is welded and fixed inside the ventilation cylinder 812. A third spring 823 is welded and fixed on the bottom end surface of the push plate 818. A through hole 824 is formed through the second support plate 802. An assembly groove 825 is formed through the second support plate 802. A rubber plate 826 is fixedly connected inside the assembly groove 825. The second springs 819 are symmetrically distributed on both sides inside the push plate 818, and the second springs 819 correspond to the top rod 820 and the fixing rod 821 one by one. A sliding rod 822 is connected in a limiting and sliding manner on the fixing rod 821. The end cross section of the top rod 820 is in the shape of a right trapezoid, the top of the fixing rod 821 is inclined, and the top cross section of the sliding rod 822 is in the shape of an isosceles triangle. By using the cooperation among the top rod 820, the fixing rod 821 and the sliding rod 822, the staff only needs to repeatedly press to realize the clamping installation and disassembly of the placing mesh frame 815, further improving the convenience and efficiency of the catalyst replacement work and effectively improving the working efficiency of the purification device.

[0050] In this embodiment, a second through groove 10 is formed through the second mounting frame 9. An activated carbon mesh plate 11 is connected in the second through groove 10 in a limited sliding manner. A magnetic cover plate 12 is fixedly connected to the activated carbon mesh plate 11. The activated carbon mesh plates 11 are symmetrically distributed on both sides inside the second mounting frame 9. The activated carbon mesh plates 11 and the magnetic cover plates 12 are in one-to-one correspondence. The magnetic cover plates 12 are magnetically adsorbed and connected to the second mounting frame 9. The bottom end of the second mounting frame 9 is welded and fixed with a heat insulation box 13. The bottom end of the heat insulation box 13 is welded and fixed with a collection box 14. The activated carbon mesh plate 11 can perform secondary adsorption and purification on the exhaust gas of catalytic oxidation to further remove possible by-products. Moreover, the activated carbon mesh plate 11 can be conveniently replaced through the magnetic cover plate 12.

[0051] In this embodiment, a second servo motor 15 is welded and fixed to the bottom end surface of the collection box 14. The output end of the second servo motor 15 is connected with a drive shaft 16. A sealing plate 17 is welded and fixed to the drive shaft 16. The sealing plate 17 is rotationally connected to the heat insulation box 13 through a sealing bearing. A heat conduction pipe 18 is welded and fixed to the sealing plate 17. The sealing plates 17 are symmetrically distributed on the upper and lower sides of the heat insulation box 13. The heat conduction pipes 18 are equally angularly distributed on the sealing plate 17. A water inlet pipe 19 and a drain pipe 20 are connected to the heat insulation box 13. An exhaust pipe 21 and a blanking pipe 22 are connected to the collection box 14. Solenoid valves are installed on the water inlet pipe 19, the drain pipe 20, the exhaust pipe 21 and the blanking pipe 22. The second servo motor 15 can drive each heat conduction pipe 18 on the sealing plate 17 to rotate stably through the drive shaft 16, so as to uniformly heat the water in the heat insulation box 13. Moreover, under the heat exchange principle, the water vapor generated by the catalytic oxidation of the high-temperature exhaust gas can form condensed water and be transported to the collection box 14 for automatic collection; and the heated water can be transported to a heat exchange device for heat energy recovery and utilization to improve the energy utilization rate.

[0052] It should be noted that the present invention is a purification device and method for catalytic oxidation of VOCs at normal temperature. First, the second fixed pipe 403 can be connected to the exhaust pipe of an industrial device. Under the driving action of an air pump 404, the high-temperature exhaust gas generated by the industrial device can be transported to the first mounting frame 401 through the second fixed pipe 403 and the first fixed pipe 402. At this time, the VOCs exhaust gas can be filtered and dehumidified through a filter mesh plate 406 and a dehumidification mesh plate 407. At the same time, part of the VOCs can be decomposed by the photocatalyst coated on the metal mesh plate 408 in cooperation with an ultraviolet lamp tube 415, reducing the subsequent catalytic oxidation load and the energy consumption of catalytic oxidation. Moreover, during the exhaust gas transportation process, the air flow can drive the guide fan blades 416 to rotate automatically, and then drive the rubber rod 418 to rotate automatically through a driven shaft 417, so as to dial the dust and impurities filtered by the filter mesh plate 406 into the collection groove 409 for automatic collection;

[0053] After the device has been working for a long time, simply pull the clamping rod 414 upward so that it moves out of the clamping slot 411 on the connecting plate 410. At this time, just pull the connecting plate 410 outward to facilitate the disassembly of the filter screen plate 406, the dehumidification screen plate 407, and the metal screen plate 408. Subsequently, the new filter screen plate 406, dehumidification screen plate 407, and metal screen plate 408 can be inserted into the first installation frame 401 through the first through groove 405 to complete the installation. At this time, under the elastic action of the first spring 413, the clamping rod 414 can be driven to automatically engage into the clamping slots 411 on each connecting plate 410, completing the clamping installation of the filter screen plate 406, dehumidification screen plate 407, and metal screen plate 408, ensuring the convenience of its cleaning or replacement work;

[0054] After the high-temperature VOCs waste gas is pretreated by the first installation frame 401, it can be transported to the shunt frame 6 through the air duct 5 and automatically and evenly shunted through each shunt hole 7. At this time, the VOCs in the waste gas can be evenly contacted with the transition metal catalysts placed everywhere inside the placement mesh frame 815. Under the action of the transition metal catalyst, the high-temperature VOCs waste gas is oxidized and decomposed into carbon dioxide and water under normal temperature conditions. At this time, the water exists in the form of water vapor. Subsequently, the carbon dioxide and water vapor pass through the activated carbon mesh plate 11 in the second installation frame 9. Under the action of the activated carbon mesh plate 11, the catalytically oxidized waste gas can be secondarily adsorbed and purified to further remove possible by-products, and the activated carbon mesh plate 11 can be conveniently and stably disassembled, installed, and replaced through the magnetic cover plate 12;

[0055] Subsequently, the purified waste gas can enter from the top of each heat conduction pipe 18 and be discharged from the bottom of each heat conduction pipe 18. The discharged waste gas is discharged through the exhaust pipe 21 on the collection box 14. And during the discharge process of the waste gas, the second servo motor 15 can drive each heat conduction pipe 18 on the sealing plate 17 to rotate stably through the drive shaft 16. At this time, the high-temperature waste gas flowing in the heat conduction pipe 18 can evenly heat the water in the heat insulation box 13. And under the heat exchange principle, the water vapor generated by the catalytic oxidation of the high-temperature waste gas can form condensed water and be transported to the collection box 14 for automatic collection, and can be transported to the recycling place through the discharge pipe 22; Moreover, the heated water can be transported to the heat exchange equipment through the drain pipe 20 for heat energy recycling to improve the energy utilization rate, and new purified water can be transported through the water inlet pipe 19 for subsequent heat exchange work;

[0056] After the device has been working for a period of time, the staff can drive the first servo motor 804 on the protective frame 803. At this time, the first servo motor 804 can drive the limit plate 806 and the guide rod 807 on the turntable 805 to rotate stably. Under the movement of the guide rod 807, it can be inserted into the guide groove 810 on the guide plate 809 and the guide plate 809 can be turned to rotate. After the guide plate 809 rotates 90°, the guide rod 807 can move out of the guide groove 810 on the guide plate 809, and then With the continued movement of the guide rod 807, it can be inserted into the next guide groove 810 and continue to turn the guide plate 809 to rotate. This reciprocating process can drive the guide plate 809 to automatically and stably rotate intermittently, and each time it rotates 90°. When the guide plate 809 rotates out of the guide groove 810, the limit plate 806 rotates to fit the guide plate 809 and limits the guide plate 809 to ensure the stability of the guide plate 809 when it stops rotating, avoid its deviation, and ensure the stability of its intermittent rotation work.

[0057] By utilizing the two intermittent rotations of the guide plate 809, the central plate 811 on the guide shaft 808 can drive the ventilators 812 on both sides to automatically and efficiently switch positions. At this time, the catalyst that has been working for a long time is moved to the side, and the new catalyst is moved to the bottom of the diversion frame 6 to work, which makes up for the defect that the existing catalytic oxidation VOCs purification device needs to be shut down for a long time before the replacement and filling of the catalyst can be completed. The staff has enough time to replace and fill the alternate catalyst; at this time, the staff only needs to use the grab bar 8 16 presses down the placement screen frame 815, and the placement screen frame 815 drives the push plate 818 to move downward synchronously through the base 817, and can squeeze the third spring 823. At this time, under the blocking effect of the slide bar 822, the push rod 820 can be pushed to move inside the push plate 818 until the push plate 818 drives the push rod 820 to move downward to the bottom of the slide bar 822. At this time, the push rod 820 can automatically move outward and reset through the second spring 819. Subsequently, under the elastic effect of the third spring 823, the placement screen frame can be driven by the base 817 and the push plate 818. 815 moves upward, and at the same time, the sliding rod 822 can be pushed upward synchronously by the top rod 820 until the sliding rod 822 moves to the top of the fixed rod 821. At this time, under the blocking effect of the top of the fixed rod 821, the bottom inclined surface of the sliding rod 822 can also push the top rod 820 to move inside the push plate 818 until the push plate 818 drives the top rod 820 to move upward to the top of the fixed rod 821. At this time, the blocking of the fixed rod 821 is lost, and the disassembly of the placement frame 815 can be completed conveniently, and then the rubber plate 826 can be pushed away, and the placement The placement screen frame 815 is pulled upward and disengaged from the assembly slot 825 to complete the disassembly, and then the staff can replace and fill the catalyst in the placement screen frame 815. After replacement and filling, similarly, the placement screen frame 815 only needs to be placed in place and pressed downward so that the top rod 820 is engaged between the fixed rod 821 and the sliding rod 822, that is, the initial position. Under the blocking effect of the fixed rod 821, the placement screen frame 815 can be easily installed, ensuring the subsequent alternating replacement of the catalyst and the stability and convenience of the catalytic oxidation work.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A purification device for catalytic oxidation of VOCs at room temperature, characterized in that: The invention comprises a device bottom plate (1) and a second installation frame (9), wherein a protective side plate (2) is welded and fixed to the device bottom plate (1), a fixed top plate (3) is welded and fixed to the protective side plate (2), a pretreatment component (4) is installed on the fixed top plate (3), an air guide pipe (5) is welded and fixed to the fixed top plate (3), a flow diversion frame (6) is welded and fixed to the bottom of the air guide pipe (5), a flow diversion hole (7) is opened through the bottom of the flow diversion frame (6), an alternating catalytic component (8) is installed on the protective side plate (2), and the alternating catalytic component (8) comprises a first support plate (801) and a second support plate (802), wherein the first support plate (801) and the second support plate (802) are both welded and fixed to the protective side plate. On the plate (2), a protective frame (803) is welded and fixed on the bottom end surface of the second supporting plate (802), a first servo motor (804) is welded and fixed on the bottom end surface of the protective frame (803), a turntable (805) is welded and fixed on the output shaft of the first servo motor (804), a limit plate (806) and a guide rod (807) are welded and fixed on the turntable (805), a guide shaft (808) is rotatably connected to the second supporting plate (802), a guide plate (809) and a center plate (811) are welded and fixed on the guide shaft (808), a guide groove (810) is provided on the guide plate (809), and a ventilator (812) is welded and fixed on the center plate (811).

2. A room temperature catalytic oxidation VOCs purification device according to claim 1, characterized in that: The pretreatment component (4) comprises a first installation frame (401), the first installation frame (401) is welded and fixed on the top surface of the fixed top plate (3), the top of the first installation frame (401) is fixedly connected to a first fixed pipe (402), the top of the first fixed pipe (402) is connected to a second fixed pipe (403), the second fixed pipe (403) is flange-connected to an air pump (404), the first fixed pipe (402) is rotatably connected to a guide blade (416) via an inner bearing, the guide blade (416) is welded and fixed to a driven shaft (417), the bottom end of the driven shaft (417) is fixedly connected to a rubber rod (418), the driven shaft (417) is fixed to the middle part of the rubber rod (418), and the length of the rubber rod (418) is greater than the length of the first installation frame (401).

3. A room temperature catalytic oxidation VOCs purification device according to claim 2, characterized in that: The first installation frame (401) is provided with a first through slot (405), a filter plate (406), a moisture removal screen plate (407) and a metal screen plate (408) are slidably connected in the first through slot (405), a collecting slot (409) is provided on the filter plate (406), a connecting plate (412) is welded and fixed on the first installation frame (401), a first spring (413) is welded and fixed on the connecting plate (412), a clamping rod (414) is welded and fixed on the first spring (413), and an ultraviolet lamp tube (415) is installed in the first installation frame (401).

4. A room temperature catalytic oxidation VOCs purification device according to claim 3, characterized in that: The filter plate (406), dehumidification mesh plate (407) and metal mesh plate (408) are symmetrically distributed on both sides of the first installation frame (401); the filter plate (406), dehumidification mesh plate (407) and metal mesh plate (408) are fixedly connected with a connecting plate (410); a slot (411) is provided through the connecting plate (410); the top end surface of the filter plate (406) is in contact with the bottom end surface of the rubber rod (418); and the metal mesh plate (408) is evenly coated with a photocatalyst.

5. The device for purifying VOCs by catalytic oxidation at room temperature according to claim 1, characterized in that: The diversion holes (7) are distributed at equal angles on the bottom of the diversion frame (6); two ventilation tubes (812) are provided, and the two ventilation tubes (812) are symmetrically distributed on both sides of the center plate (811); four guide grooves (810) are provided, and the four guide grooves (810) are distributed at equal angles on the guide plate (809); and the side end surface of the guide plate (809) is in an arc shape.

6. A room temperature catalytic oxidation VOCs purification device according to claim 5, characterized in that: A limiting groove (813) is provided in the ventilation duct (812), and a limiting block (814) is slidingly connected in the limiting groove (813), and a placement net frame (815) is welded and fixed on the limiting block (814). The limiting grooves (813) are symmetrically distributed on both sides of the ventilation duct (812), and the limiting grooves (813) correspond to the limiting blocks (814) one by one. The placement net frame (815) is evenly filled with a transition metal catalyst.

7. A room temperature catalytic oxidation VOCs purification device according to claim 6, characterized in that: A base (817) is welded and fixed to the center of the bottom of the placement net frame (815), a push plate (818) is welded and fixed to the bottom end of the base (817), a second spring (819) is welded and fixed inside the push plate (818), a push rod (820) is welded and fixed on the second spring (819), and the push rod (820) is slidably connected inside the push plate (818), a fixing rod (821) is welded and fixed inside the ventilation tube (812), and a third spring (821) is welded and fixed on the bottom end surface of the push plate (818). 23), a through hole (824) is formed on the second support plate (802), the second springs (819) are symmetrically distributed on both sides of the push plate (818), the second springs (819) correspond to the top rod (820) and the fixed rod (821) one by one, respectively, the fixed rod (821) is slidably connected to the upper limit position with a slide rod (822), the end cross section of the top rod (820) is a right-angled trapezoid, the top of the fixed rod (821) is inclined, and the top cross section of the slide rod (822) is an isosceles triangle.

8. The device for purifying VOCs by catalytic oxidation at room temperature according to claim 1, characterized in that: The second installation frame (9) is provided with a second through slot (10), an activated carbon mesh plate (11) is slidably connected in a limited position in the second through slot (10), a magnetic cover plate (12) is fixedly connected to the activated carbon mesh plate (11), the activated carbon mesh plates (11) are symmetrically distributed on both sides of the second installation frame (9), the activated carbon mesh plates (11) correspond one to one with the magnetic cover plates (12), a heat-insulating box (13) is welded and fixed to the bottom end of the second installation frame (9), and a collecting box (14) is welded and fixed to the bottom end of the heat-insulating box (13).

9. A room temperature catalytic oxidation VOCs purification device according to claim 8, characterized in that: A second servo motor (15) is welded and fixed on the bottom end surface of the collection box (14); the output end of the second servo motor (15) is connected to a driving shaft (16); a sealing plate (17) is welded and fixed on the driving shaft (16); the sealing plate (17) is rotatably connected to the temperature isolation box (13) via a sealing bearing; a heat conducting pipe (18) is welded and fixed on the sealing plate (17); the sealing plates (17) are symmetrically distributed on the upper and lower sides of the temperature isolation box (13); and the heat conducting pipes (18) are distributed on the sealing plate (17) at equal angles.

10. A method for purifying VOCs by catalytic oxidation at room temperature, using the device for purifying VOCs by catalytic oxidation at room temperature as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: by connecting the pretreatment component (4) to the exhaust pipe of the industrial equipment, and pre-treating the high-temperature VOCs exhaust gas by filtering, dehumidifying and photocatalytically decomposing the exhaust gas; S2: After the VOCs waste gas is pre-treated, it passes through the transition metal catalyst in the alternating catalytic component (8). Under the action of the catalyst, the high-temperature VOCs waste gas is oxidized and decomposed into carbon dioxide and water at room temperature; S3: Perform secondary adsorption purification through an activated carbon mesh plate (11) to further remove possible by-products; S4: The high-temperature VOCs waste gas heats the water in the temperature-isolating box (13) through the heat-conducting pipe (18), and the heated water can be transported to the heat exchange equipment for heat energy recovery and utilization, and the purified gas can be stably discharged through the exhaust pipe (21).

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