Waste gas purification device for powder coating production

Abstract

Belonging to the technical field of waste gas purification, the invention relates to a waste gas purification device for powder coating production, the waste gas purification device for powder coating production comprises a dust removal tank, a gas inlet pipe, a purification tank, an exhaust pipe and a purification box, and also comprises: a filtering mechanism; a cleaning mechanism; a recoil mechanism; a catalytic mechanism; and a disinfection mechanism. Through cooperative use of the cleaning mechanism and the backflushing mechanism, in the revolution process of the filter cartridge, the filter cartridge can rotate in the revolution process through the arrangement of the cleaning mechanism, so that a backflushing ring and a cleaning ring move up and down in a reciprocating manner along the inner surface and the outer surface of the filter cartridge; according to the device, particles attached to the outer surface of the filter cartridge are removed in an all-around manner, and a cleaning ring is arranged in a matched manner, so that firmer particles attached to the outer surface of the filter cartridge can be removed, and the cleanliness of the filter cartridge is ensured, so that the waste gas filtering efficiency of the filter cartridge is improved, and the situation that the circulation efficiency of waste gas is reduced due to blockage of the filter cartridge is avoided; and the service life of the filter cartridge is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas purification, and particularly relates to a waste gas purification device for powder coating production. Background Art

[0002] Waste gas is generated during the production process of powder coatings. The components of the waste gas mainly include: particulate matter: plastic powder particles (such as polyethylene, polypropylene, etc.), with a particle size usually of 10 - 50 μm, accounting for 70% - 80% of the total waste gas volume; VOCs: non-methane total hydrocarbons, benzene series, esters, etc., accounting for 20% - 30%; other pollutants: a small amount of CO or polycyclic aromatic hydrocarbons may be generated during high-temperature curing. When purifying the waste gas, the following methods are usually adopted: dust collector combined with filter screen filtration, activated carbon adsorption, catalytic combustion, low-temperature plasma, photo-oxygen catalysis (UV photolysis), etc.

[0003] Currently, when purifying the waste gas generated during the production process of powder coatings, it is first necessary to filter the particulate matter in the waste gas. When using a dust removal filter element to filter the particulate matter, the particulate matter will adhere to the outer surface of the filter element, resulting in a reduction in the waste gas purification efficiency. It is necessary to stop the machine regularly for cleaning, increasing the burden and affecting the waste gas purification efficiency. Moreover, the long-term adhesion of particulate matter will shorten the service life of the filter element, resulting in an increase in the cost of waste gas purification. Based on this, a waste gas purification device for powder coating production is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a reasonably designed waste gas purification device for powder coating production in order to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A waste gas purification device for powder coating production, including a dust removal tank, an intake pipe, a purification tank, an exhaust pipe, and a purification box, further including:

[0007] A filtering mechanism fixedly connected inside the dust removal tank, the filtering mechanism including a filter cartridge and a filter screen;

[0008] A cleaning mechanism installed on the outer surface of the filter cartridge, the cleaning mechanism including a cleaning ring that fits on the outer surface of the filter cartridge and moves up and down along the outer surface of the filter cartridge;

[0009] A backwashing mechanism installed on the inner surface of the filter cartridge, the backwashing mechanism including a backwashing ring that fits on the inner surface of the filter cartridge and moves up and down along the inner surface of the filter cartridge. The backwashing ring moves up and down synchronously and at the same speed as the cleaning ring, and air blowing holes are provided on the outer surface of the backwashing ring;

[0010] A catalytic mechanism fixedly connected to the filtering mechanism through a transmission component and installed inside the purification tank;

[0011] The disinfection mechanism fixedly connected to the inner surface of the purification tank.

[0012] As a further optimized solution of the present invention, the filtering mechanism further includes a fixing frame fixedly connected to the inner surface of the dust removal tank. A motor is installed in the middle of the top of the fixing frame. The output end of the motor is fixedly connected to a rotating shaft. The inner surface of the dust removal tank is rotatably connected to a rotating plate. The rotating plate is fixedly connected to the outer surface of the rotating shaft. The filter screen is fixedly connected to the outer surface of the rotating shaft and is rotatably connected to the inner surface of the dust removal tank.

[0013] As a further optimized solution of the present invention, the filter cartridge is rotatably connected to the bottom of the rotating plate. A through hole communicating with the inside of the filter cartridge is opened on the rotating plate, and a connecting frame is fixedly connected in the through hole.

[0014] As a further optimized solution of the present invention, the cleaning mechanism further includes a toothed ring fixedly connected to the inner surface of the dust removal tank. A gear is fixedly connected to the bottom of the filter cartridge, and the gear meshes with the toothed ring. A first reciprocating lead screw is fixedly connected through the middle of the gear. A lifting plate is threadedly connected to the outer surface of the first reciprocating lead screw. A connecting rod is fixedly connected to the top of the lifting plate. A lifting ring is fixedly connected to the top of the connecting rod. The cleaning ring is fixedly connected to the inner surface of the lifting ring. A limiting rod is slidably connected through the lifting plate, and the limiting rod is fixedly connected to the top of the filter screen.

[0015] As a further optimized solution of the present invention, the two ends of the first reciprocating lead screw are respectively rotatably connected to the connecting frame and the filter screen, and the first reciprocating lead screw penetrates through the backwashing ring and is threadedly connected to the backwashing ring.

[0016] As a further optimized solution of the present invention, the backwashing mechanism further includes an air pump fixedly communicated with the purification box. The exhaust end of the air pump is fixedly communicated with an injection pipe, and the injection pipe penetrates through the dust removal tank and is fixedly connected to the dust removal tank. The exhaust end of the injection pipe is fixedly communicated with an air chamber, and the air chamber is fixedly connected to the bottom of the fixing frame. The bottom of the air chamber is hermetically rotatably connected to a rotating ring. The bottom of the rotating ring is fixedly communicated with a telescopic pipe, and the telescopic pipe is fixedly communicated with the backwashing ring.

[0017] As a further optimized solution of the present invention, the disinfection mechanism includes two fixing rings fixedly connected to the inner surface of the purification tank. Ultraviolet lamps are installed on the adjacent sides of the two fixing rings, and a refraction ring is fixedly connected to the adjacent sides of the two fixing rings.

[0018] As a further optimized solution of the present invention, the catalytic mechanism includes two mounting frames fixedly connected inside the purification tank. A rotating rod is rotatably connected between the two mounting frames. A limiting groove is formed through the side wall of the rotating rod. A lifting frame is slidably connected inside the limiting groove. A catalytic net is fixedly connected to the outer surface of the lifting frame. The outer surface of the catalytic net is attached to the refraction ring. A second reciprocating lead screw is fixedly connected to the top of the mounting frame located below. The top of the second reciprocating lead screw is rotatably connected to the inner top of the rotating rod. The second reciprocating lead screw penetrates through the lifting frame and is threadedly connected to the lifting frame.

[0019] As a further optimized solution of the present invention, the transmission component includes a first synchronous pulley fixedly connected to the bottom of the rotating shaft. A second synchronous pulley is fixedly connected to the outer surface of the rotating rod. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt. A cleaning belt is inserted into the top of the synchronous belt. The synchronous belt and the cleaning belt both penetrate through the dust removal tank and the purification tank and are hermetically slidably connected to the dust removal tank and the purification tank. The top of the cleaning belt is attached to the bottom of the filter screen.

[0020] As a further optimized solution of the present invention, the dust removal tank is fixedly communicated with the air inlet pipe. A dust discharge pipe is fixedly connected to the bottom of the dust removal tank. The dust removal tank is fixedly communicated with the purification tank through a connecting pipe. A drain pipe is fixedly connected to the bottom of the purification tank. An exhaust pipe is fixedly connected to the side wall of the purification tank. The end of the exhaust pipe is fixedly communicated with the purification box. An activated carbon plate is inserted into the purification box.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. By the combined use of the cleaning mechanism and the backwashing mechanism in the present invention, during the revolution of the filter cartridge, the cleaning mechanism will cause the filter cartridge to rotate during revolution, so that the backwashing ring and the cleaning ring reciprocate up and down along the inner and outer surfaces of the filter cartridge, removing the particulate matter attached to the outer surface of the filter cartridge in all directions. And with the setting of the cleaning ring, it can remove the relatively firmly attached particulate matter on the outer surface of the filter cartridge, ensuring the cleanliness of the filter cartridge, thereby improving the filtering efficiency of the filter cartridge for waste gas, avoiding the blockage of the filter cartridge from affecting the reduction of the waste gas circulation efficiency, and prolonging the service life of the filter cartridge.

[0023] 2. Through the setting of the cleaning belt in the present invention, while the cleaning belt provides the function of power transmission in cooperation with the synchronous belt, it can clean the bottom of the rotating filter screen in all directions, avoiding the blockage of the filter holes of the filter screen and affecting the filtering and purification efficiency of the waste gas, thereby improving the filtering and purification efficiency of the waste gas.

[0024] 3. By providing a wavy refraction ring, the present invention can prevent the waste gas from directly contacting the ultraviolet lamp, protecting the ultraviolet lamp. At the same time, it can refract the ultraviolet rays emitted by the ultraviolet lamp, enabling the ultraviolet rays to irradiate the waste gas not only horizontally but also obliquely, and then irradiating all parts of the purification tank 5, thereby expanding the decomposition quality and efficiency of the waste gas.

[0025] 4. Through the provision of a catalytic mechanism, the catalytic net can reciprocate up and down while rotating, achieving the purpose of changing the position of the catalytic net, prolonging the contact time between the catalyst and the waste gas, and thus improving the purification efficiency of the waste gas, making the purified waste gas discharged into the external environment cleaner. At the same time, the catalytic net can scrape the water vapor adhering to the vertical part of the inner surface of the refraction ring, enabling the water vapor to gather more quickly, preventing the water vapor from corroding the refraction ring after absorbing the waste gas and staying for a long time, and also preventing the long-term adhesion of the water vapor from reducing the purification efficiency of the ultraviolet rays on the waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall front three-dimensional structure schematic diagram of the present invention;

[0027] Figure 2 is the overall back three-dimensional structure schematic diagram of the present invention;

[0028] Figure 3 is the front-middle part sectional structure schematic diagram of the present invention;

[0029] Figure 4 is the Figure 3 enlarged structure schematic diagram at position A in the present invention;

[0030] Figure 5 is the Figure 3 enlarged structure schematic diagram at position B in the present invention;

[0031] Figure 6 is the Figure 3 enlarged structure schematic diagram at position C in the present invention;

[0032] Figure 7 is the top-sectional structure schematic diagram of the present invention;

[0033] Figure 8 is the Figure 7 enlarged structure schematic diagram at position D in the present invention;

[0034] Figure 9 is the side-sectional structure schematic diagram of the present invention;

[0035] Figure 10 is the Figure 9 enlarged structure schematic diagram at position E in the present invention;

[0036] Figure 11 is a three-dimensional perspective upward view of the internal structure of the present invention;

[0037] Figure 12 is a three-dimensional perspective front view of the internal structure of the present invention;

[0038] Figure 13 is a three-dimensional perspective partial sectional view of the recoil mechanism and cleaning mechanism of the present invention.

[0039] In the figure: 1, dust removal tank; 2, intake pipe; 3, ash discharge pipe; 4, connecting pipe; 5, purification tank; 6, drain pipe; 7, exhaust pipe; 8, purification box; 9, activated carbon plate; 10, filtering mechanism; 1001, fixing frame; 1002, motor; 1003, rotating shaft; 1004, rotating plate; 1005, through hole; 1006, connecting frame; 1007, filter cartridge; 1008, filter screen; 11, cleaning mechanism; 1101, gear ring; 1102, gear; 1103, first reciprocating lead screw; 1104, lifting plate; 1105, limiting rod; 1106, connecting rod; 1107, lifting ring; 1108, cleaning ring; 12, recoil mechanism; 1201, recoil ring; 1202, air blowing hole; 1203, telescopic pipe; 1204, rotating ring; 1205, air chamber; 1206, air injection pipe; 1207, air pump; 13, transmission component; 1301, first synchronous pulley; 1302, synchronous belt; 1303, cleaning belt; 1304, second synchronous pulley; 14, disinfection mechanism; 1401, fixing ring; 1402, ultraviolet lamp; 1403, refraction ring; 15, catalytic mechanism; 1501, mounting frame; 1502, rotating rod; 1503, second reciprocating lead screw; 1504, limiting groove; 1505, lifting frame; 1506, catalytic net. Detailed implementation manners

[0040] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following detailed implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0041] Embodiment: As Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 9 , Figure 11 and Figure 12As shown in the figure, an exhaust gas purification device for powder coating production includes a dust removal tank 1, an intake pipe 2, a purification tank 5, an exhaust pipe 7, and a purification box 8. The dust removal tank 1 is fixedly connected to the intake pipe 2. A dust discharge pipe 3 is fixedly connected to the bottom of the dust removal tank 1, and a valve is installed in the dust discharge pipe 3. The valve can be opened when dust discharge is required. The dust removal tank 1 is fixedly connected to the purification tank 5 through a connecting pipe 4. A drain pipe 6 is fixedly connected to the bottom of the purification tank 5, and a valve is installed in the drain pipe 6. The valve can be opened when drainage is required. The side wall of the purification tank 5 is fixedly connected to the exhaust pipe 7, and the end of the exhaust pipe 7 is fixedly connected to the purification box 8. An activated carbon plate 9 is inserted into the purification box 8.

[0042] During use, cooled exhaust gas is injected into the dust removal tank 1 through the intake pipe 2. The dust removal tank 1 filters the particulate matter in the exhaust gas. The filtered exhaust gas enters the purification tank 5 through the connecting pipe 4. The purification tank 5 performs ultraviolet catalytic purification on the exhaust gas. The purified gas enters the purification box 8 through the exhaust pipe 7. The activated carbon plate 9 in the purification box 8 performs final disinfection and purification. The disinfected and purified gas will be discharged to the outside, thus completing the purification of the exhaust gas.

[0043] As Figure 3 、 Figure 4 、 Figure 7 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown in the figure, the exhaust gas purification device further includes a filtering mechanism 10 fixedly connected inside the dust removal tank 1. The filtering mechanism 10 includes a rotating plate 1004 rotatably connected inside the dust removal tank 1. A filter cylinder 1007 is rotatably connected to the bottom of the rotating plate 1004. A through hole 1005 communicating with the inside of the filter cylinder 1007 is formed in the rotating plate 1004. A connecting frame 1006 is fixedly connected inside the through hole 1005. A filter screen 1008 is rotatably connected inside the dust removal tank 1. The filtering mechanism 10 further includes a fixing frame 1001 fixedly connected to the inner surface of the dust removal tank 1. A motor 1002 is installed in the middle of the top of the fixing frame 1001. The output end of the motor 1002 is fixedly connected to a rotating shaft 1003. The rotating plate 1004 is fixedly connected to the outer surface of the rotating shaft 1003. The filter screen 1008 is fixedly connected to the outer surface of the rotating shaft 1003.

[0044] During use, the motor 1002 is started to make the rotating shaft 1003 rotate, driving the rotating plate 1004 and the filter screen 1008 to rotate. The rotation of the rotating plate 1004 will drive the filter cylinder 1007 to revolve. The exhaust gas entering the dust removal tank 1 first filters the particulate matter with a larger diameter through the filter screen 1008. The exhaust gas filtered by the filter screen 1008 will be filtered by the filter cylinder 1007 for the particulate matter with a smaller diameter in the exhaust gas. After the particulate matter in the exhaust gas is filtered, it will automatically settle downward under the action of gravity, and the filtered exhaust gas will enter the purification tank 5 through the connecting pipe 4.

[0045] As Figure 3 , Figure 5 , Figure 7 , Figure 11 and Figure 12 shown, the exhaust gas purification device further includes: a disinfection mechanism 14 fixedly connected to the inner surface of the purification tank 5, a catalytic mechanism 15 is installed in the disinfection mechanism 14, the disinfection mechanism 14 includes two fixing rings 1401 fixedly connected to the inner surface of the purification tank 5, an ultraviolet lamp 1402 is installed on the adjacent sides of the two fixing rings 1401, a refraction ring 1403 is fixedly connected to the adjacent sides of the two fixing rings 1401. As Figure 5 shown, the refraction ring 1403 is arranged in a wavy shape, and the refraction ring 1403 is made of a transparent material (and this transparent material does not affect the intensity of ultraviolet rays, such as high-purity quartz glass).

[0046] When the exhaust gas enters the dust removal tank 1 through the intake pipe 2, the ultraviolet lamp 1402 is started, and the exhaust gas entering the purification tank 5 will be decomposed by the ultraviolet rays emitted by the ultraviolet lamp 1402 in cooperation with the catalytic mechanism 15. During this process, the wavy refraction ring 1403 will refract the ultraviolet rays emitted by the ultraviolet lamp 1402, so that the ultraviolet rays can not only irradiate the exhaust gas horizontally but also obliquely, and then the ultraviolet rays are directed to all parts of the purification tank 5, which not only improves the disinfection efficiency of microorganisms in the exhaust gas but also helps to improve the decomposition efficiency generated in cooperation with the catalytic mechanism 15.

[0047] As Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 10 , Figure 11 and Figure 12As shown in the figure, the waste gas purification device further includes a catalytic mechanism 15 fixedly connected to the filtering mechanism 10 through a transmission assembly 13 and installed in the purification tank 5. The catalytic mechanism 15 includes two mounting brackets 1501 fixedly connected in the purification tank 5. A rotating rod 1502 is rotatably connected between the two mounting brackets 1501. A limiting groove 1504 is formed through the side wall of the rotating rod 1502. A lifting frame 1505 is slidably connected in the limiting groove 1504. A catalytic mesh 1506 is fixedly connected to the outer surface of the lifting frame 1505. The catalytic mesh 1506 is arranged in a honeycomb structure, and the honeycomb structure is filled with a catalyst (the catalyst can be nano-TiO2, noble metal catalyst, and non-noble metal catalyst). The catalyst decomposes the organic matter in the waste gas into water and carbon dioxide in cooperation with the ultraviolet rays emitted by the ultraviolet lamp 1402, which is UV photocatalytic purification (the principle of UV photocatalytic purification is mainly composed of the combination of photolysis and photocatalytic oxidation technologies: photolysis technology uses specific wavelength ultraviolet light to crack waste gas molecules, break the molecular chain, and at the same time photolyze water and oxygen in the air to generate hydroxyl radicals, ozone and other advanced oxidants to oxidize and remove VOCs; photocatalytic oxidation technology adds nano-scale active materials in the equipment, and under the action of ultraviolet light, it produces a more intense catalytic degradation function). Although the honeycomb structure of the catalytic mesh 1506 is filled with a catalyst, it does not affect the passage of waste gas. The outer surface of the catalytic mesh 1506 is attached to the straight edge part of the refraction ring 1403. The top of the lower mounting bracket 1501 is fixedly connected with a second reciprocating lead screw 1503. The top of the second reciprocating lead screw 1503 is rotatably connected to the inner top of the rotating rod 1502. The second reciprocating lead screw 1503 passes through the lifting frame 1505 and is threadedly connected to the lifting frame 1505. The transmission assembly 13 includes a first synchronous pulley 1301 fixedly connected to the bottom of the rotating shaft 1003. A second synchronous pulley 1304 is fixedly connected to the outer surface of the rotating rod 1502. The first synchronous pulley 1301 and the second synchronous pulley 1304 are connected by a synchronous belt 1302. A cleaning belt 1303 is inserted into the top of the synchronous belt 1302. Both the synchronous belt 1302 and the cleaning belt 1303 pass through the dust removal tank 1 and the purification tank 5 and are hermetically slidably connected to the dust removal tank 1 and the purification tank 5. The top of the cleaning belt 1303 is attached to the bottom of the filter screen 1008.

[0048] During use, the rotation of the rotating shaft 1003 will drive the rotation of the first synchronous pulley 1301, and then drive the rotation of the second synchronous pulley 1304 through the synchronous belt 1302, thereby causing the rotating rod 1502 to rotate. And when the first synchronous pulley 1301 rotates to drive the synchronous belt 1302 to work, since the cleaning belt 1303 is inserted into the top of the synchronous belt 1302 and the filter screen 1008 is in a rotating state, the cleaning belt 1303 can clean the bottom of the filter screen 1008, avoiding the blockage of the filter holes of the filter screen 1008 and affecting the filtration and purification efficiency of the waste gas, thereby improving the purification and filtration efficiency of the waste gas. The rotation of the rotating rod 1502 will drive the catalytic net 1506 to rotate through the limiting groove 1504 and the lifting frame 1505. When the catalytic net 1506 rotates, the catalyst in the catalytic net 1506 will be in full contact with the filtered waste gas, improving the purification and decomposition efficiency of the ultraviolet lamp 1402 and the catalyst on the waste gas. And during this process, due to the rotation of the rotating rod 1502 and the second reciprocating lead screw 1503 being fixedly connected to the mounting frame 1501, the lifting frame 1505 will rotate along the outer surface of the second reciprocating lead screw 1503. At this time, since the second reciprocating lead screw 1503 and the lifting frame 1505 are threadedly connected, the lifting frame 1505 will reciprocate up and down along the inner surface of the limiting groove 1504 and the outer surface of the second reciprocating lead screw 1503, thereby changing the position of the catalytic net 1506, being able to extend the contact time between the catalyst and the waste gas, and thus improving the purification efficiency of the waste gas, making the purified waste gas discharged into the external environment cleaner.

[0049] As Figure 4 , Figure 7 , Figure 9 , Figure 11 , Figure 12 and Figure 13 shown, the waste gas purification device further includes: a cleaning mechanism 11 installed on the outer surface of the filter cartridge 1007. The cleaning mechanism 11 includes a cleaning ring 1108 that fits on the outer surface of the filter cartridge 1007 and moves up and down along the outer surface of the filter cartridge 1007. The cleaning mechanism 11 further includes a gear ring 1101 fixedly connected to the inner surface of the dust removal tank 1. The bottom of the filter cartridge 1007 is fixedly connected with a gear 1102, and the gear 1102 meshes with the gear ring 1101. The middle of the gear 1102 is fixedly connected through with a first reciprocating lead screw 1103. The two ends of the first reciprocating lead screw 1103 are respectively rotationally connected to the connecting frame 1006 and the filter screen 1008. A lifting plate 1104 is threadedly connected to the outer surface of the first reciprocating lead screw 1103. The top of the lifting plate 1104 is fixedly connected with a connecting rod 1106. The top of the connecting rod 1106 is fixedly connected with a lifting ring 1107. The cleaning ring 1108 is fixedly connected to the inner surface of the lifting ring 1107. A limiting rod 1105 is slidably connected through the lifting plate 1104, and the limiting rod 1105 is fixedly connected to the top of the filter screen 1008.

[0050] During use, due to the revolution of the filter cartridge 1007 and the setting of the gear ring 1101, the gear 1102 will revolve with the revolution of the filter cartridge 1007. And during the revolution, the gear 1102 will rotate under the action of the gear ring 1101, thereby driving the filter cartridge 1007 to rotate during its revolution. During this process, since the gear 1102 rotates during its revolution, it will drive the first reciprocating lead screw 1103 to rotate during its revolution. At this time, the lifting plate 1104 will move up and down along the outer surface of the first reciprocating lead screw 1103 under the action of the limit rod 1105. And the up and down movement of the lifting plate 1104 will drive the lifting ring 1107 to move up and down through the connecting rod 1106, so that the cleaning ring 1108 moves up and down along the outer surface of the filter cartridge 1007. And during this process, the filter cartridge 1007 is rotating, so that the cleaning ring 1108 can clean the outer surface of the filter cartridge 1007 in all directions, removing the particulate matter attached to the outer surface of the filter cartridge 1007, avoiding the blockage of the filter cartridge 1007 from affecting the filtration efficiency of the waste gas, and at the same time reducing the probability of the filter cartridge 1007 being corroded and prolonging the service life of the filter cartridge 1007.

[0051] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 、 Figure 9 、 Figure 11 、 Figure 12 and Figure 13 As shown in

[0052] During use, the air pump 1207 is started to cause the air pump 1207 to extract the purified gas in the purification tank 8 and inject the gas into the air chamber 1205 through the injection pipe 1206. The gas entering the air chamber 1205 will be injected into the backflush ring 1201 through the telescopic pipe 1203 and then blown out through the air holes 1202. During this process, due to the rotation of the first reciprocating lead screw 1103, the backflush ring 1201 will reciprocate up and down along the inner surface of the filter cartridge 1007 under the limiting action of the telescopic pipe 1203. And during this process, the filter cartridge 1007 is in a rotating state, and the backflush ring 1201 is arranged opposite to the cleaning ring 1108. Therefore, the gas blown out by the air holes 1202 can act on various parts of the filter cartridge 1007 to remove the particulate matter attached to the outer surface of the filter cartridge 1007. And with the arrangement of the cleaning ring 1108, the particulate matter more firmly attached to the outer surface of the filter cartridge 1007 can be removed, ensuring the cleanliness of the filter cartridge 1007, thereby improving the filtering efficiency of the filter cartridge 1007 for waste gas, avoiding the decrease in the flow efficiency of waste gas caused by the blockage of the filter cartridge 1007, extending the service life of the filter cartridge 1007, and this operation can clean the filter cartridge 1007 without stopping the machine, reducing the burden on personnel, and thus improving the purification efficiency of waste gas.

[0053] The specific working principle of the present invention is as follows:

[0054] During use, the motor 1002, the ultraviolet lamp 1402, and the air pump 1207 are started, and then the cooled waste gas is injected into the dust removal tank 1 through the inlet pipe 2. The dust removal tank 1 filters the particulate matter in the waste gas. The waste gas entering the dust removal tank 1 first filters the particulate matter with a larger diameter through the filter screen 1008. The waste gas filtered by the filter screen 1008 will be filtered by the filter cartridge 1007 for the particulate matter with a smaller diameter in the waste gas. After the particulate matter in the waste gas is filtered, during this process, the operation of the motor 1002 causes the rotating shaft 1003 to rotate and drives the rotating plate 1004 and the filter screen 1008 to rotate. The rotation of the rotating plate 1004 will drive the filter cartridge 1007 to revolve, stirring the waste gas, so that the particulate matter in the waste gas can be partially separated under the action of the centrifugal force generated by the rotation of the filter cartridge 1007 and the filter screen 1008, thus facilitating better filtering of the waste gas;

[0055] Meanwhile, due to the revolution of the filter cartridge 1007 and the setting of the gear ring 1101, the gear 1102 will revolve with the revolution of the filter cartridge 1007. And during the revolution, the gear 1102 will rotate under the action of the gear ring 1101, thereby driving the filter cartridge 1007 to rotate during its revolution. During this process, since the gear 1102 rotates during its revolution, it will drive the first reciprocating lead screw 1103 to rotate during its revolution. At this time, the lifting plate 1104 will move up and down along the outer surface of the first reciprocating lead screw 1103 under the action of the limiting rod 1105. The up and down movement of the lifting plate 1104 will drive the lifting ring 1107 to move up and down through the connecting rod 1106, causing the cleaning ring 1108 to move up and down along the outer surface of the filter cartridge 1007. And during this process, the filter cartridge 1007 is rotating, so that the cleaning ring 1108 can clean the outer surface of the filter cartridge 1007 in all directions. And during this process, the air pump 1207 extracts the purified gas in the purification tank 8 and injects the gas into the air chamber 1205 through the injection pipe 1206. The gas entering the air chamber 1205 will be injected into the backflush ring 1201 through the telescopic pipe 1203 and then blown out through the air holes 1202. During this process, due to the rotation of the first reciprocating lead screw 1103, the backflush ring 1201 will reciprocate up and down along the inner surface of the filter cartridge 1007 under the limiting action of the telescopic pipe 1203. And during this process, the filter cartridge 1007 is in a rotating state, and the backflush ring 1201 is arranged opposite to the cleaning ring 1108. Therefore, the gas blown out from the air holes 1202 can act on various parts of the filter cartridge 1007 to remove the particulate matter attached to the outer surface of the filter cartridge 1007. And in cooperation with the setting of the cleaning ring 1108, it can remove the relatively firmly attached particulate matter on the outer surface of the filter cartridge 1007, ensuring the cleanliness of the filter cartridge 1007, thereby improving the filtering efficiency of the filter cartridge 1007 for waste gas, avoiding the blockage of the filter cartridge 1007 from affecting the decline of the waste gas circulation efficiency, prolonging the service life of the filter cartridge 1007. And this operation can clean the filter cartridge 1007 without stopping the machine, reducing the burden on personnel, thereby improving the purification efficiency of waste gas, while reducing the probability of the filter cartridge 1007 being corroded and prolonging the service life of the filter cartridge 1007;

[0056] The filtered exhaust gas enters the purification tank 5 through the connecting pipe 4. The purification tank 5 conducts ultraviolet catalytic purification on the exhaust gas. The ultraviolet rays emitted by the ultraviolet lamp 1402 are decomposed in cooperation with the catalyst. During this process, the wavy refraction ring 1403 will refract the ultraviolet rays emitted by the ultraviolet lamp 1402, so that the ultraviolet rays can irradiate the exhaust gas not only horizontally but also obliquely, and then the ultraviolet rays irradiate all parts of the purification tank 5, so as to fully cooperate with the catalyst, which not only improves the disinfection efficiency of microorganisms in the exhaust gas but also improves the decomposition efficiency of VOCs. The exhaust gas will be decomposed into carbon dioxide and water. The generated water will drip downward and fall on the bottom of the purification tank 5 and the drain pipe 6. During this process, the rotation of the rotating shaft 1003 will drive the first synchronous pulley 1301 to rotate, and then drive the second synchronous pulley 1304 to rotate through the synchronous belt 1302, so as to make the rotating rod 1502 rotate. And when the first synchronous pulley 1301 rotates to drive the synchronous belt 1302 to work, since the cleaning belt 1303 is inserted into the top of the synchronous belt 1302 and the filter screen 1008 is in a rotating state, the cleaning belt 1303 can clean the bottom of the filter screen 1008 to prevent the filter holes of the filter screen 1008 from being blocked, affecting the filtering and purification efficiency of the exhaust gas, thus improving the purification and filtering efficiency of the exhaust gas. The rotation of the rotating rod 1502 will drive the catalytic mesh 1506 to rotate through the limiting groove 1504 and the lifting frame 1505. When the catalytic mesh 1506 rotates, the catalyst in the catalytic mesh 1506 will be in full contact with the filtered exhaust gas, improving the purification and decomposition efficiency of the ultraviolet lamp 1402 and the catalyst on the exhaust gas. And during this process, due to the rotation of the rotating rod 1502 and the second reciprocating lead screw 1503 is fixedly connected to the mounting frame 1501, the lifting frame 1505 will rotate along the outer surface of the second reciprocating lead screw 1503. At this time, since the second reciprocating lead screw 1503 is threadedly connected to the lifting frame 1505, the lifting frame 1505 will reciprocate up and down along the inner surface of the limiting groove 1504 and the outer surface of the second reciprocating lead screw 1503, thus changing the position of the catalytic mesh 1506, which can extend the contact time between the catalyst and the exhaust gas, thereby improving the purification efficiency of the exhaust gas, making the purified exhaust gas discharged into the external environment cleaner. And due to the up and down movement of the catalytic mesh 1506, the catalytic mesh 1506 can scrape the water vapor adhering to the vertical part of the inner surface of the refraction ring 1403, so that the water vapor can gather faster, preventing the water vapor from absorbing the exhaust gas and staying for a long time to corrode the refraction ring 1403, and at the same time preventing the long-term adhesion of the water vapor from reducing the purification efficiency of the ultraviolet rays on the exhaust gas;

[0057] The purified gas enters the purification box 8 through the exhaust pipe 7. The activated carbon plate 9 in the purification box 8 conducts the final disinfection and purification. The disinfected and purified gas will be discharged to the outside, and the purification of the exhaust gas is completed.

[0058] It should be noted that during the process of purifying the waste gas, the valves in the ash discharge pipe 3 and the drain pipe 6 are regularly opened to collect and treat the particulate matter generated by filtering the waste gas in the dust removal tank 1, and to collect and treat the water generated by catalytic decomposition of the waste gas in the purification tank 5. After the treatment is completed, the valves can be closed.

[0059] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An exhaust gas purification device for powder coating production, comprising a dust removal tank (1), an intake pipe (2), a purification tank (5), an exhaust pipe (7) and a purification box (8), characterized in that, Further comprising: A filtering mechanism (10) fixedly connected inside the dust removal tank (1), the filtering mechanism (10) comprising a filter cartridge (1007) and a filter screen (1008); A cleaning mechanism (11) installed on the outer surface of the filter cartridge (1007), the cleaning mechanism (11) comprising a cleaning ring (1108) that fits against the outer surface of the filter cartridge (1007) and moves up and down along the outer surface of the filter cartridge (1007); A backwashing mechanism (12) installed on the inner surface of the filter cartridge (1007), the backwashing mechanism (12) comprising a backwashing ring (1201) that fits against the inner surface of the filter cartridge (1007) and moves up and down along the inner surface of the filter cartridge (1007), the backwashing ring (1201) moving up and down synchronously and at the same speed as the cleaning ring (1108), and air blowing holes (1202) being formed on the outer surface of the backwashing ring (1201); A catalytic mechanism (15) fixedly connected to the filtering mechanism (10) through a transmission assembly (13) and installed inside the purification tank (5); A disinfection mechanism (14) fixedly connected to the inner surface of the purification tank (5).

2. The waste gas purification device for powder coating production according to claim 1, characterized in that: The filtering mechanism (10) further comprises a fixing frame (1001) fixedly connected to the inner surface of the dust removal tank (1), a motor (1002) being installed in the middle of the top of the fixing frame (1001), a rotating shaft (1003) being fixedly connected to the output end of the motor (1002), a rotating plate (1004) being rotatably connected to the inner surface of the dust removal tank (1), the rotating plate (1004) being fixedly connected to the outer surface of the rotating shaft (1003), the filter screen (1008) being fixedly connected to the outer surface of the rotating shaft (1003) and being rotatably connected to the inner surface of the dust removal tank (1).

3. An exhaust gas purification device for powder coating production according to claim 1, characterized in that: The filter cartridge (1007) is rotatably connected to the bottom of the rotating plate (1004), through holes (1005) communicating with the inside of the filter cartridge (1007) being formed on the rotating plate (1004), and a connecting frame (1006) being fixedly connected inside the through holes (1005).

4. An exhaust gas purification device for powder coating production according to claim 3, characterized in that: The cleaning mechanism (11) further comprises a gear ring (1101) fixedly connected to the inner surface of the dust removal tank (1), a gear (1102) being fixedly connected to the bottom of the filter cartridge (1007), the gear (1102) meshing with the gear ring (1101), a first reciprocating lead screw (1103) being fixedly connected through the middle of the gear (1102), a lifting plate (1104) being threadedly connected to the outer surface of the first reciprocating lead screw (1103), a connecting rod (1106) being fixedly connected to the top of the lifting plate (1104), a lifting ring (1107) being fixedly connected to the top of the connecting rod (1106), the cleaning ring (1108) being fixedly connected to the inner surface of the lifting ring (1107), and a limiting rod (1105) being slidably connected through the lifting plate (1104), the limiting rod (1105) being fixedly connected to the top of the filter screen (1008).

5. An exhaust gas purification device for powder coating production according to claim 4, characterized in that: Both ends of the first reciprocating lead screw (1103) are rotatably connected to the connecting frame (1006) and the filter screen (1008) respectively. The first reciprocating lead screw (1103) passes through the backwashing ring (1201) and is threadedly connected to the backwashing ring (1201).

6. The waste gas purification device for powder coating production according to claim 2, characterized in that: The backwashing mechanism (12) further includes an air pump (1207) fixedly communicated with the purification tank (8). The exhaust end of the air pump (1207) is fixedly communicated with an air injection pipe (1206). The air injection pipe (1206) passes through the dust removal tank (1) and is fixedly connected to the dust removal tank (1). The exhaust end of the air injection pipe (1206) is fixedly communicated with an air chamber (1205). The air chamber (1205) is fixedly connected to the bottom of the fixing frame (1001). The bottom of the air chamber (1205) is hermetically and rotatably connected with a rotating ring (1204). The bottom of the rotating ring (1204) is fixedly communicated with a telescopic pipe (1203). The telescopic pipe (1203) is fixedly communicated with the backwashing ring (1201).

7. An exhaust gas purification device for powder coating production according to claim 2, characterized in that: The disinfection mechanism (14) includes two fixing rings (1401) fixedly connected to the inner surface of the purification tank (5). Ultraviolet lamps (1402) are installed on the adjacent sides of the two fixing rings (1401). A refraction ring (1403) is fixedly connected to the adjacent sides of the two fixing rings (1401).

8. An exhaust gas purification device for powder coating production according to claim 7, characterized in that: The catalytic mechanism (15) includes two mounting frames (1501) fixedly connected inside the purification tank (5). A rotating rod (1502) is rotatably connected between the two mounting frames (1501). A limiting groove (1504) is formed through the side wall of the rotating rod (1502). A lifting frame (1505) is slidably connected in the limiting groove (1504). A catalytic net (1506) is fixedly connected to the outer surface of the lifting frame (1505). The outer surface of the catalytic net (1506) is attached to the refraction ring (1403). A second reciprocating lead screw (1503) is fixedly connected to the top of the lower mounting frame (1501). The top of the second reciprocating lead screw (1503) is rotatably connected to the inner top of the rotating rod (1502). The second reciprocating lead screw (1503) passes through the lifting frame (1505) and is threadedly connected to the lifting frame (1505).

9. An exhaust gas purification device for powder coating production according to claim 8, characterized in that: The transmission assembly (13) includes a first synchronous pulley (1301) fixedly connected to the bottom of the rotating shaft (1003). A second synchronous pulley (1304) is fixedly connected to the outer surface of the rotating rod (1502). The first synchronous pulley (1301) and the second synchronous pulley (1304) are connected by a synchronous belt (1302). A cleaning belt (1303) is inserted into the top of the synchronous belt (1302). The synchronous belt (1302) and the cleaning belt (1303) both pass through the dust removal tank (1) and the purification tank (5) and are hermetically and slidably connected to the dust removal tank (1) and the purification tank (5). The top of the cleaning belt (1303) is attached to the bottom of the filter screen (1008).

10. The waste gas purification device for powder coating production according to claim 1, characterized in that: The dust removal tank (1) is fixedly communicated with the air inlet pipe (2). The bottom of the dust removal tank (1) is fixedly communicated with a dust discharging pipe (3). The dust removal tank (1) is fixedly communicated with a purification tank (5) through a connecting pipe (4). The bottom of the purification tank (5) is fixedly communicated with a drain pipe (6). The side wall of the purification tank (5) is fixedly communicated with an exhaust pipe (7). The end of the exhaust pipe (7) is fixedly communicated with a purification box (8). An activated carbon plate (9) is inserted into the purification box (8).

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