Waste gas purification and recovery device of coating machine

Abstract

The utility model discloses a coating machine waste gas purification and recovery device which comprises an operation table, a liquid storage box fixedly installed on the lower surface of the operation table, a liquid inlet pipe installed at one end of the liquid storage box in a communicated mode, a ball valve installed at the other end of the liquid inlet pipe in a communicated mode, a U-shaped frame fixedly installed on the upper surface of the middle section of the operation table, and a rolling mechanism rotatably installed in the U-shaped frame. The lower half portion of the rolling mechanism is located in the liquid storage box, the upper half portion of the rolling mechanism is sleeved with the filtering and recycling mechanism, and the filtering and recycling mechanism is fixedly installed between the two sets of U-shaped frames. By means of the design of the filtering and recycling mechanism, heat contained in gas can be guided back together, the requirement for external energy can be reduced, the energy utilization efficiency of the whole system can be improved by reheating coating through recycled heat energy, and therefore the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a waste gas purification and recovery device for a coating machine. Background Technology

[0002] Coating machines are mainly used for surface coating processes of films, paper, etc. This machine coats a roll of substrate with a layer of adhesive, paint or ink with specific functions, and then dries and rewinds it. It adopts a special multi-functional coating head, which can realize various forms of surface coating. The unwinding and rewinding of the coating machine are equipped with a full-speed automatic film splicing mechanism and PLC program tension closed-loop automatic control.

[0003] For example, patent CN215233036U discloses a waste gas treatment device for a coating machine, relating to the field of waste gas treatment technology. It includes a body, a water tank, a treatment chamber, an exhaust fan, and a treatment mechanism. The water tank is fixedly installed on the top of the body, and the treatment chamber is fixedly installed inside the body. The exhaust fan is fixedly installed on the inner wall of the treatment chamber. Waste gas is introduced into the device through an inlet pipe. The water tank then performs dust suppression on the introduced waste gas. Heating elements heat and evaporate the dust-suppressed wastewater. The exhaust fan then conducts the evaporated waste gas through an inlet pipe to the treatment mechanism for purification and filtration. The waste gas undergoes multi-layer purification and filtration through layers of filter elements. The treated waste gas is then treated with ozone by an ozone generator and discharged through an exhaust pipe, effectively improving the waste gas treatment effect and enhancing the device's practicality.

[0004] However, the exhaust gas treatment device of the aforementioned coating machine cannot return the heat after treating the exhaust gas to recover and utilize the heat energy in the exhaust gas, thus wasting the usable heat energy in the exhaust gas. Since the heat energy cannot be recovered, the device needs to consume additional energy to heat the adhesive, coating or ink, which will increase the operating cost. Utility Model Content

[0005] The purpose of this invention is to provide a coating machine exhaust gas purification and recovery device to solve the problem mentioned in the background art that the heat energy in the exhaust gas cannot be recovered and utilized after treatment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A coating machine exhaust gas purification and recovery device includes: an operating table, a liquid storage box fixedly installed on the lower surface of the operating table, an inlet pipe connected to one end of the liquid storage box, a ball valve connected to the other end of the inlet pipe, a U-shaped frame fixedly installed on the upper surface of the middle section of the operating table, a roller pressing mechanism rotatably installed inside the U-shaped frame, the lower half of the roller pressing mechanism being located inside the liquid storage box, and the upper half of the roller pressing mechanism being fitted inside a filter recovery mechanism, the filter recovery mechanism being fixedly installed between two sets of U-shaped frames.

[0008] Preferably, the rolling mechanism includes a first coating roller, which is rotatably mounted in the lower half of the U-shaped frame and rotates within the liquid storage box. A geared motor is fixedly mounted at one end of the U-shaped frame, and the output shaft of the geared motor is fixedly connected to the first coating roller.

[0009] Preferably, guide blocks are slidably installed in both sets of the U-shaped frames, and a second coating roller is rotatably installed between the two sets of guide blocks, with the second coating roller being flush with the first coating roller.

[0010] Preferably, a threaded post is rotatably mounted on the upper surface of the guide block, and the upper half of the threaded post extends through the top of the U-shaped frame, so that the threaded post drives the guide block to move up and down by means of thread transmission within the U-shaped frame.

[0011] Preferably, the filtration and recovery mechanism includes a sleeve, which is fixedly installed between two sets of U-shaped frames and fitted onto the outer surface of the second coating roller.

[0012] Preferably, the feed inlets on both sides of the sleeve are provided with curtains, which can reduce the emission of exhaust gas.

[0013] Preferably, a fan is fixedly installed on the upper surface of the sleeve, and an air intake port of the fan is connected to an air intake pipe. One end of the air intake pipe is connected to an expansion nozzle, which is installed on the upper surface of the sleeve so that it can draw in the thermal decomposition reaction waste gas generated by the first coating roller and the second coating roller housed inside during heating.

[0014] Preferably, the exhaust port of the fan is connected to an exhaust pipe, which is connected to one side of the sleeve.

[0015] Preferably, both sides of the intake pipe are fixedly installed with convex rings, and an exhaust gas filter element can be filled between the two sets of convex rings in the intake pipe.

[0016] Preferably, the upper half of the exhaust pipe is rotatably fitted with a closing cover, which can be flipped to seal the intake pipe and fasten the exhaust filter element inside.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Through the design of the U-shaped frame, liquid storage box, filtration and recovery mechanism, and roller pressing mechanism, during use, the paint is poured into the liquid storage box from the inlet pipe, allowing the paint in the storage box to come into contact with the outer surface of the roller pressing mechanism. Then, the worker can slide the material to be coated into the filtration and recovery mechanism and push it between the roller pressing mechanism. As the roller pressing mechanism rolls the material, the paint in the storage box is applied to the surface of the board. During the coating process, due to high temperature, pressure, and incomplete combustion, some components in the paint may undergo thermal decomposition reactions. These reactions produce some harmful gases, such as... Carbon monoxide, sulfur dioxide, and other pollutants are captured and filtered by a filtration and recovery system. The filtered exhaust gas is then returned to the filtration and recovery system, and the heat contained in the gas is also recovered. By capturing and filtering harmful gases (such as carbon monoxide and sulfur dioxide) generated during the coating process, the amount of harmful substances emitted into the environment can be significantly reduced, thus mitigating the impact on air quality. Furthermore, the recovery and utilization of the heat contained in the gas reduces the demand for external energy. Reheating the coating with the recovered heat can improve the energy efficiency of the entire system, thereby reducing production costs.

[0019] 2. Through the design of the geared motor, the first coating roller and the second coating roller, when coating the board, the material to be coated can be slid into the filter and recovery mechanism and pushed between the first coating roller and the second coating roller. As the first coating roller is driven to rotate by the geared motor, the material can be bitten into the first coating roller and the second coating roller and rolled. During the rotation of the first coating roller, the paint in the liquid storage box will be coated on the surface of the board, thus realizing the coating of the liquid storage box on the surface of the board.

[0020] When coating thicker or thinner sheets, the guide block can be pushed and pulled by rotating the threaded column within the U-shaped frame to drive the second coating roller to rise and fall between the U-shaped frames. This allows the distance between the second coating roller and the first coating roller to be freely adjusted according to the thickness of the sheet.

[0021] 3. Through the design of the sleeve, fan, suction pipe, exhaust gas filter, expansion nozzle, and exhaust pipe, during the coating process, due to factors such as high temperature, pressure, and incomplete combustion, some components in the coating may undergo thermal decomposition reactions. These reactions produce some harmful gases, such as carbon monoxide and sulfur dioxide. These gases are drawn into the expansion nozzle of the fan. During the process of drawing in exhaust gas, the exhaust gas passes through the exhaust gas filter in the suction pipe, which filters the intake exhaust gas. The filtered exhaust gas is then discharged back into the sleeve through the exhaust pipe of the fan. The heat contained in the gas is also returned, thereby improving the energy utilization efficiency of the system, reducing energy consumption, and saving operating costs.

[0022] When replacing the exhaust gas filter after long-term use, the filter can be removed from between the convex rings of the intake pipe by unfolding the closed cover, and the new filter can be reinstalled. Then the closed cover can be closed again and tightened with bolts. The unfolding of the closed cover makes it easy to replace the exhaust gas filter, making maintenance work simpler and faster. Workers do not need to disassemble complex parts and can quickly complete the replacement of the exhaust gas filter, reducing downtime and improving work efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the coating machine exhaust gas purification and recovery device of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the U-shaped frame of this utility model;

[0025] Figure 3 This is a schematic diagram of the roller pressing mechanism of this utility model;

[0026] Figure 4 This is a schematic diagram of the filtration and recovery mechanism of this utility model.

[0027] In the diagram: 1. Operating table; 101. U-shaped frame; 102. Liquid inlet pipe; 103. Liquid storage box; 2. Filtration and recovery mechanism; 201. Sleeve; 202. Partition curtain; 203. Fan; 204. Suction pipe; 205. Convex ring; 206. Closing cover; 207. Exhaust gas filter element; 208. Expansion nozzle; 209. Exhaust pipe; 3. Roller pressing mechanism; 301. Gear motor; 302. First coating roller; 303. Guide block; 304. Second coating roller; 305. Threaded column. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-4 This embodiment provides the following technical solution:

[0030] like Figures 1-2 As shown, a coating machine exhaust gas purification and recovery device includes: an operating table 1, a liquid storage box 103 fixedly installed on the lower surface of the operating table 1, an inlet pipe 102 connected to one end of the liquid storage box 103, a ball valve connected to the other end of the inlet pipe 102, a U-shaped frame 101 fixedly installed on the upper surface of the middle section of the operating table 1, a roller pressing mechanism 3 rotatably installed inside the U-shaped frame 101, the lower half of the roller pressing mechanism 3 is located inside the liquid storage box 103, and the upper half of the roller pressing mechanism 3 is fitted inside a filter recovery mechanism 2, which is fixedly installed between two sets of U-shaped frames 101.

[0031] Through the design of the U-shaped frame 101, the liquid storage box 103, the filter recovery mechanism 2, and the roller pressing mechanism 3, during use, the paint can be poured into the liquid storage box 103 from the inlet pipe 102, allowing the paint in the liquid storage box 103 to come into contact with the outer surface of the roller pressing mechanism 3. Then, the operator can slide the material to be coated into the filter recovery mechanism 2 and push it between the roller pressing mechanism 3. As the roller pressing mechanism 3 rolls the material, the paint in the liquid storage box 103 is coated onto the surface of the board. During the coating process, due to factors such as high temperature, pressure, and incomplete combustion, some components in the paint may undergo thermal decomposition reactions. These reactions will produce... Harmful gases such as carbon monoxide and sulfur dioxide are generated during the coating process. These gases are then enclosed and filtered by the filtration and recovery unit 2. The filtered exhaust gas is then discharged back into the filtration and recovery unit 2, and the heat contained in the gas is also returned. By capturing and filtering harmful gases such as carbon monoxide and sulfur dioxide generated during the coating process, the amount of harmful substances emitted into the environment can be significantly reduced, thus reducing the impact on air quality. Furthermore, the heat contained in the gas can be recovered and utilized, reducing the demand for external energy. Reheating the coating with the recovered heat can improve the energy efficiency of the entire system, thereby reducing production costs.

[0032] like Figure 3As shown, the roller pressing mechanism 3 includes a first coating roller 302, which is rotatably installed in the lower half of the U-shaped frame 101. The first coating roller 302 rotates in the liquid storage box 103. A reduction motor 301 is fixedly installed at one end of the U-shaped frame 101, and the output shaft of the reduction motor 301 is fixedly connected to the first coating roller 302.

[0033] Guide blocks 303 are slidably installed inside both sets of U-shaped frames 101, and a second coating roller 304 is rotatably installed between the two sets of guide blocks 303. The second coating roller 304 is flush with the first coating roller 302.

[0034] A threaded post 305 is rotatably mounted on the upper surface of the guide block 303. The upper half of the threaded post 305 extends through the top of the U-shaped frame 101, so that the threaded post 305 drives the guide block 303 to move up and down by means of the threaded transmission within the U-shaped frame 101.

[0035] Through the design of the geared motor 301, the first coating roller 302 and the second coating roller 304, when coating the board, the material to be coated can be slid into the filter and recovery mechanism 2 and pushed between the first coating roller 302 and the second coating roller 304. As the first coating roller 302 is driven to rotate by the geared motor 301, the material can be bitten into the first coating roller 302 and the second coating roller 304 and rolled. During the rotation of the first coating roller 302, the paint in the liquid storage box 103 will be coated on the surface of the board, thus realizing the coating of the liquid storage box 103 on the surface of the board.

[0036] If coating is required on thicker or thinner plates, the guide block 303 can be pushed and pulled by rotating the threaded column 305 through the threaded transmission in the U-shaped frame 101, thereby driving the second coating roller 304 to rise and fall between the U-shaped frame 101. This allows the distance between the second coating roller 304 and the first coating roller 302 to be freely adjusted according to the thickness of the plate.

[0037] like Figure 4 As shown, the filter recovery mechanism 2 includes a sleeve 201, which is fixedly installed between two sets of U-shaped frames 101 and fitted onto the outer surface of the second coating roller 304.

[0038] The feed inlets on both sides of the sleeve 201 are equipped with curtains 202, which can reduce the emission of exhaust gas.

[0039] A fan 203 is fixedly installed on the upper surface of the sleeve 201. The air intake of the fan 203 is connected to an air intake pipe 204. One end of the air intake pipe 204 is connected to an expansion nozzle 208. The expansion nozzle 208 is connected to the upper surface of the sleeve 201 so that it can draw in the thermal decomposition reaction waste gas generated by the first coating roller 302 and the second coating roller 304, which are enclosed inside, during heating.

[0040] The exhaust port of the fan 203 is connected to an exhaust pipe 209, which is connected to one side of the sleeve 201.

[0041] Both sides of the intake pipe 204 are fixedly installed with protruding rings 205, and the exhaust gas filter element 207 can be filled between the two sets of protruding rings 205 inside the intake pipe 204.

[0042] The upper part of the exhaust pipe 209 is rotatably fitted with a closing cover 206, which can be flipped to seal the intake pipe 204 and fasten the exhaust filter element 207 inside.

[0043] Through the design of sleeve 201, fan 203, suction pipe 204, exhaust gas filter element 207, expansion nozzle 208 and exhaust pipe 209, during the coating process, due to factors such as high temperature, pressure and incomplete combustion, some components in the coating may undergo thermal decomposition reactions. These reactions produce some harmful gases, such as carbon monoxide and sulfur dioxide. These gases are drawn in by the expansion nozzle 208 of fan 203. During the process of drawing in exhaust gas, the exhaust gas passes through the exhaust gas filter element 207 in suction pipe 204, which filters the drawn-in exhaust gas. The filtered exhaust gas is then discharged back into sleeve 201 through exhaust pipe 209 of fan 203. The heat contained in the gas is also returned, thereby improving the energy utilization efficiency of the system, reducing energy consumption, and saving operating costs.

[0044] When replacing the exhaust gas filter element 207 after long-term use, it can be removed from between the convex rings 205 of the intake pipe 204 by unfolding the closing cover 206 and a new exhaust gas filter element 207 can be reinstalled. Then the closing cover 206 can be closed again and tightened with bolts. The opening and closing cover 206 facilitates the replacement of the exhaust gas filter element 207, making maintenance work simpler and faster. Workers do not need to disassemble complex parts and can quickly complete the replacement of the exhaust gas filter element 207, reducing downtime and improving work efficiency.

[0045] Based on the above technical solution, the working steps of this solution are summarized as follows: In use, the coating material can be poured from the inlet pipe 102 into the storage box 103, allowing the coating material in the storage box 103 to come into contact with the surface of the first coating roller 302. Then, the operator can slide the material to be coated into the sleeve 201 and push it between the first coating roller 302 and the second coating roller 304. As the first coating roller 302 rotates driven by the reduction motor 301, it bites the material between the first coating roller 302 and the second coating roller 304 for rolling. During the rotation of the first coating roller 302, the coating material in the storage box 103 is applied to the surface of the board, thus completing the coating process of the storage box 103. The coating is applied to the surface of the board. During the coating process, due to factors such as high temperature, pressure and incomplete combustion, some components in the coating may undergo thermal decomposition reactions. These reactions produce some harmful gases, such as carbon monoxide and sulfur dioxide. These gases are drawn into the expansion nozzle 208 of the fan 203. During the process of drawing in the exhaust gas, the exhaust gas passes through the exhaust gas filter element 207 in the intake pipe 204, which filters the intake exhaust gas. The filtered exhaust gas is then discharged back into the sleeve 201 through the exhaust pipe 209 of the fan 203. The heat contained in the gas is also returned and can be reused to heat the coating.

[0046] In summary: By also guiding the heat contained in the gas back, and capturing and filtering harmful gases such as carbon monoxide and sulfur dioxide generated during the coating process, the emission of harmful substances into the environment can be significantly reduced, thus reducing the impact on air quality. Furthermore, the recovery and utilization of the heat contained in the gas can reduce the demand for external energy. Using the recovered heat energy to reheat the coating can improve the energy efficiency of the entire system, thereby reducing production costs.

[0047] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for purifying and recovering exhaust gas from a coating machine, characterized in that, include: An operating table (1) is provided with a liquid storage box (103) fixedly installed on its lower surface. One end of the liquid storage box (103) is connected to an inlet pipe (102), and the other end of the inlet pipe (102) is connected to a ball valve. A U-shaped frame (101) is fixedly installed on the upper surface of the middle section of the operating table (1). A roller pressing mechanism (3) is rotatably installed inside the U-shaped frame (101). The lower half of the roller pressing mechanism (3) is located inside the liquid storage box (103), and the upper half of the roller pressing mechanism (3) is fitted inside a filter recovery mechanism (2). The filter recovery mechanism (2) is fixedly installed between two sets of U-shaped frames (101).

2. The coating machine exhaust gas purification and recovery device according to claim 1, characterized in that: The roller pressing mechanism (3) includes a first coating roller (302), which is rotatably installed in the lower half of the U-shaped frame (101). The first coating roller (302) rotates in the liquid storage box (103). A reduction motor (301) is fixedly installed at one end of the U-shaped frame (101), and the output shaft of the reduction motor (301) is fixedly connected to the first coating roller (302).

3. The coating machine exhaust gas purification and recovery device according to claim 2, characterized in that: Guide blocks (303) are slidably installed in both sets of the U-shaped frame (101), and a second coating roller (304) is rotatably installed between the two sets of guide blocks (303). The second coating roller (304) is flush with the first coating roller (302).

4. The coating machine exhaust gas purification and recovery device according to claim 3, characterized in that: A threaded column (305) is rotatably mounted on the upper surface of the guide block (303). The upper half of the threaded column (305) extends through the top of the U-shaped frame (101) via a threaded transmission. This allows the threaded column (305) to drive the guide block (303) to move up and down by means of threaded transmission within the U-shaped frame (101).

5. The coating machine exhaust gas purification and recovery device according to claim 4, characterized in that: The filtration and recycling mechanism (2) includes a sleeve (201), which is fixedly installed between two sets of U-shaped frames (101) and fitted onto the outer surface of the second coating roller (304).

6. The coating machine exhaust gas purification and recovery device according to claim 5, characterized in that: The feed inlets on both sides of the sleeve (201) are equipped with curtains (202), which can reduce the emission of exhaust gas.

7. The coating machine exhaust gas purification and recovery device according to claim 6, characterized in that: A fan (203) is fixedly installed on the upper surface of the sleeve (201). The air inlet of the fan (203) is connected to an air suction pipe (204). One end of the air suction pipe (204) is connected to an expansion nozzle (208). The expansion nozzle (208) is connected to the upper surface of the sleeve (201) so that it can suck in the thermal decomposition reaction waste gas generated by the first coating roller (302) and the second coating roller (304) inside the sleeve when heated.

8. The coating machine exhaust gas purification and recovery device according to claim 7, characterized in that: The exhaust port of the fan (203) is connected to an exhaust pipe (209), which is connected to one side of the sleeve (201).

9. The coating machine exhaust gas purification and recovery device according to claim 8, characterized in that: Both sides of the air intake pipe (204) are fixedly installed with protruding rings (205), and an exhaust gas filter element (207) can be filled between the two sets of protruding rings (205) in the air intake pipe (204).

10. The coating machine exhaust gas purification and recovery device according to claim 9, characterized in that: The upper half of the exhaust pipe (209) is rotatably fitted with a closing cover (206), which can be flipped to seal the intake pipe (204) and fasten the exhaust filter (207) inside.

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