Circulating purification device for tail gas of graphitization furnace

Abstract

The utility model relates to the technical field of tail gas purification, and discloses a graphitization furnace tail gas circulation purification device which comprises a purification tank and a circulation water tank, the other end of a water inlet pipe and the other end of a water outlet pipe are communicated into the circulation water tank through a water pump, and an annular water guide pipe is fixedly installed at the bottom end of the water inlet pipe. A plurality of spray heads are arranged at the bottom of the annular water guide pipe in an array mode, an embedding groove is formed in the middle of the purification tank, a filter screen is installed in the embedding groove, a convenient disassembly and assembly assembly is arranged at the position, located at the embedding groove, of the outer side of the purification tank, and a movable drainage assembly is arranged at the top, located in the purification tank, of the drainage pipe. The movable pipe moves upwards through the buoyancy of the floating block, so that the leaking hole is always located at the highest position of the liquid level, then only the water on the uppermost layer is recycled, the particulate matter precipitates downwards at the bottom, and the water on the uppermost layer basically does not contain the particulate matter; therefore, blockage of the nozzle due to particles contained in the recycled water can be avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas purification, and specifically relates to a graphite furnace tail gas circulation purification device. Background Technique

[0002] A graphite furnace is a device used for high-temperature treatment of carbon materials such as sintering and graphitization, purification of graphite powder, and other materials that can be graphitized in a carbon environment. It is mainly used for high-temperature treatment such as sintering and graphitization of carbon materials, graphitization of PI films, and graphitization of heat-conducting materials. However, a large amount of tail gas is generated during its use, and directly discharging the tail gas into the atmosphere will cause environmental pollution. Therefore, the tail gas needs to be purified to meet the standards before being discharged.

[0003] For example, the graphite furnace purification device for realizing tail gas circulation filtration disclosed in the Chinese patent with the publication number CN218740985U includes a purification box body, a spray head, a filter screen, and an activated carbon purification net. An air inlet pipe is installed at the left end of the purification box body, and an exhaust pipe is installed at the right end of the purification box body. The spray heads are arranged at equal intervals inside the purification box body, and the spray heads are connected to an external water source through a pipe and a pump body. The filter screen is attached to the lower side of the connecting plate, and the activated carbon purification net is arranged inside the exhaust pipe. This graphite furnace purification device for realizing tail gas circulation filtration can remove particulate solids in the tail gas. Combined with the setting of the activated carbon purification net, the tail gas is purified, so as to achieve a better treatment effect on the tail gas. And through the setting of the filter screen, it is convenient to filter and recycle the water after spraying. At the same time, combined with the setting of the limiting mechanism, the activated carbon purification net can be very conveniently disassembled, cleaned, and replaced.

[0004] During the implementation of this application, the inventor found that there are at least the following problems in this technology: Although the tail gas can be purified through the above technical solution, it is inevitable that the water after spraying will be mixed with particulate matter. At this time, recycling the water mixed with particulate matter will cause blockage of the spray heads. In the long run, it will affect the purification effect of the waste gas. Therefore, further improvement can be made. Content of the Utility Model

[0005] To solve the above-mentioned problems, the present utility model provides the following technical solutions: A tail gas circulation purification device for a graphitization furnace, comprising a purification tank and a circulation water tank. Legs are fixedly installed on the outer side of the bottom of the purification tank. One side of the top of the purification tank is communicated with an intake pipe, and the other side of the purification tank opposite to the intake pipe is communicated with an exhaust pipe. An activated carbon filter screen is installed inside the end of the exhaust pipe, and the exhaust pipe is higher than the intake pipe. A water inlet pipe is fixedly communicated with the center of the top of the purification tank, and a drain pipe is fixedly communicated with the center of the bottom of the purification tank. The other ends of the water inlet pipe and the drain pipe are respectively communicated into the circulation water tank through a water pump. An annular water guide pipe is fixedly installed at the bottom end of the water inlet pipe inside the purification tank. A plurality of nozzles are arranged in an array at the bottom of the annular water guide pipe. An embedding groove is formed in the middle of the purification tank, and a filter screen is installed inside the purification tank through the embedding groove. Water is introduced from the circulation water tank into the annular water guide pipe through the water inlet pipe and then sprayed downward through the nozzles, thereby spraying the tail gas discharged into the purification tank, and further removing the particulate matter contained in the tail gas. Then, the tail gas is purified by the activated carbon filter screen in the exhaust pipe and then can be discharged outwards; A convenient disassembly and assembly component is arranged on the outer side of the purification tank at the embedding groove, and a movable drainage component is arranged at the top of the drain pipe inside the purification tank.

[0006] As an optimization, the convenient disassembly and assembly component includes a support fixedly installed on the outer side of the purification tank and at the end of the embedding groove. An arc plate is rotatably connected inside the support. An embedded plate is fixedly installed on the inner arc side of the arc plate. Sealing gaskets are arranged on both the upper and lower sides of the embedded plate. A pull plate is fixedly installed on the outer side of the end of the arc plate away from the support.

[0007] As an optimization, the cross-section of the arc plate is in a "concave" shape. The arc plate is tightly embedded in the embedding groove through the sealing gasket, and the filter screen is embedded in the groove of the arc plate. The nozzles are further positioned through the groove in the arc plate to improve the stability of its installation. Then, the sealing gasket is in close contact with the inner wall of the embedding groove to improve the sealing performance.

[0008] As an optimization, the pull plate is in a bent shape, and the included angle at the bent part is an obtuse angle. By pulling the pull plate to rotate along the support, it is convenient to move the arc plate out of the embedding groove, thereby facilitating the replacement, installation, disassembly and cleaning of the filter screen.

[0009] As an optimization, the movable drainage component includes a movable pipe inserted into the top of the drain pipe. A floating block is fixedly installed at the top end of the movable pipe. Leakage holes are arranged in an array on the outer side of the top of the movable pipe. A fine filter screen is arranged on the inner wall of the movable pipe at the leakage holes. Due to the buoyancy of the floating block, the leakage holes are always located near the water surface. The fine filter screen further filters the particles contained in the water, thereby trying to ensure that there are no particles in the recycled water.

[0010] As an optimization, a limit strip is symmetrically fixedly installed on the outer side of the movable pipe, and two limit grooves are opened on the inner wall of the drainage pipe corresponding to the limit strips on both sides, and the limit strip is slidably inserted in the limit groove. When the limit strip slides in the limit groove, it will limit the movable pipe, so that the movable pipe can slide vertically up and down.

[0011] As an optimization, an installation groove is opened at the inner wall of the purification tank corresponding to the embedding groove, and clamps are fixedly installed at the two ends of the installation groove on the inner wall of the purification tank, and the clamps on each side are symmetrically arranged up and down, and the opposite sides of the upper and lower clamps are chamfered inwardly, so that the filter net can be installed conveniently through the chamfered inclined surface between the clamps on both sides, and then the filter net is inserted into the clamp by the outer side of the filter net to further install and position it.

[0012] The beneficial effects of the utility model are:

[0013] 1. When installing the filter screen of the graphitization furnace exhaust gas circulation purification device, you only need to push the arc plate in the direction to rotate and embed it into the groove. At this time, the groove in the arc plate will be buckled on the outside of the nozzle to position it, and then the sealing gasket will be in close contact with the inner wall of the groove to improve the sealing performance. By pulling the pull plate outward, the arc plate can be driven to open and expose the groove. At this time, the filter screen can be conveniently taken out for replacement or cleaning.

[0014] 2. The graphitization furnace tail gas circulation purification device can move the movable tube upward through the buoyancy of the floating block itself, so that the leakage hole is always located at the highest point of the liquid surface, and only the top layer of water will be recycled, while the particles will settle down to the bottom, and the top layer of water will basically not contain particles, thereby minimizing the blockage of the nozzle due to particles in the recycled water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the purification tank of the utility model;

[0017] Figure 3 This is a schematic diagram of the disassembly and installation of the filter screen of the utility model;

[0018] Figure 4 This is a schematic diagram of the convenient disassembly and assembly structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the movable drainage structure of the utility model.

[0020] In the figure: 1, purification tank; 2, support leg; 3, intake pipe; 4, exhaust pipe; 5, water inlet pipe; 6, drain pipe; 7, annular water guide pipe; 8, nozzle; 9, filter screen; 10, convenient disassembly and assembly component; 11, support; 12, arc plate; 13, embedded plate; 14, gasket; 15, pull plate; 16, movable pipe; 17, floating block; 18, leakage hole; 19, fine filter screen; 20, limit strip; 21, limit groove; 22, installation groove; 23, clamping plate. Detailed implementation manner

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in 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 creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1-2 , a tail gas circulation purification device for a graphitization furnace, including a purification tank 1 and a circulation water tank. Support legs 2 are fixedly installed on the outer side of the bottom of the purification tank 1. One side of the top of the purification tank 1 is communicated with an intake pipe 3. The other side of the purification tank 1 opposite to the intake pipe 3 is communicated with an exhaust pipe 4. An activated carbon filter screen is installed inside the end of the exhaust pipe 4, and the exhaust pipe 4 is higher than the intake pipe 3. The center of the top of the purification tank 1 is fixedly communicated with a water inlet pipe 5. The center of the bottom of the purification tank 1 is fixedly communicated with a drain pipe 6. The other ends of the water inlet pipe 5 and the drain pipe 6 are respectively communicated into the circulation water tank through a water pump. An annular water guide pipe 7 is fixedly installed at the bottom end of the water inlet pipe 5 inside the purification tank 1. A plurality of nozzles 8 are arranged in an array at the bottom of the annular water guide pipe 7. An embedding groove is opened in the middle of the purification tank 1. A filter screen 9 is installed inside the purification tank 1 through the embedding groove. Water is introduced from the circulation water tank through the water inlet pipe 5 into the annular water guide pipe 7 and then sprayed downward through the nozzles 8, so as to spray the tail gas discharged into the purification tank 1, thereby removing the particulate matter contained in the tail gas. Then, the tail gas is purified by the activated carbon filter screen in the exhaust pipe 4 and then can be discharged outward; A convenient disassembly and assembly component 10 is arranged on the outer side of the purification tank 1 at the embedding groove, and a movable drainage component is arranged at the top of the drain pipe 6 inside the purification tank 1;

[0023] Please refer to Figure 1-2 , installation grooves 22 are opened on the inner wall of the purification tank 1 corresponding to the embedding groove. Clamping plates 23 are fixedly installed at both ends of the installation grooves 22 on the inner wall of the purification tank 1, and the clamping plates 23 on each side are symmetrically arranged up and down. The inner sides of the upper and lower clamping plates 23 are chamfered inward. The chamfered slope between the two clamping plates 23 on both sides facilitates the installation of the filter screen 9, and then the filter screen 9 is further installed and positioned by being clamped into the clamping plates 23.

[0024] Please refer to Figure 3-4 , the convenient disassembly and assembly component 10 includes a support 11 fixedly installed outside the purification tank 1 and at the end of the slot. A curved plate 12 is rotatably connected inside the support 11. The cross-section of the curved plate 12 is in the shape of a "concave". An embedded plate 13 is fixedly installed on the inner arc side of the curved plate 12. Sealing gaskets 14 are provided on both the upper and lower sides of the embedded plate 13. The curved plate 12 is tightly fitted in the slot through the sealing gaskets 14, and the filter screen 9 is embedded in the groove of the curved plate 12. The nozzle 8 is further positioned through the groove in the curved plate 12 to improve the stability of its installation. Then, by the sealing gaskets 14 in close contact with the inner wall of the slot, the sealing performance is improved;

[0025] Please refer to Figure 3-4 , a pull plate 15 is fixedly installed on the outer side of the end of the curved plate 12 away from the support 11. The pull plate 15 is bent, and the included angle at its bent part is an obtuse angle. By pulling the pull plate 15 to rotate along the support 11, it is convenient to remove the curved plate 12 from the slot, so as to facilitate the replacement installation and disassembly and cleaning of the filter screen 9;

[0026] Please refer to Figure 5 , the movable drainage component includes a movable pipe 16 inserted into the top of the drain pipe 6. A floating block 17 is fixedly installed at the top end of the movable pipe 16. Leak holes 18 are arrayed on the outer side of the top of the movable pipe 16. A fine filter screen 19 is provided on the inner wall of the movable pipe 16 at the position of the leak holes 18. Due to the buoyancy of the floating block 17, the leak holes 18 will always be located near the water surface. Then, the fine filter screen 19 further filters the particles contained in the water, so as to try to ensure that there are no particles in the recycled water;

[0027] Please refer to Figure 5 , limiting strips 20 are symmetrically and fixedly installed on the outer side of the movable pipe 16. Two limiting grooves 21 are provided on the inner wall of the drain pipe 6 corresponding to the two limiting strips 20, and the limiting strips 20 are slidably inserted into the limiting grooves 21. By the limiting strips 20 sliding in the limiting grooves 21, a limiting effect is exerted on the movable pipe 16, enabling the movable pipe 16 to slide vertically up and down.

[0028] During use, first, water is introduced from the circulation water tank into the annular water guide pipe 7 through the water inlet pipe 5, and then it will be sprayed downward through the nozzle 8. At this time, tail gas is discharged into the purification tank 1 through the air inlet pipe 3, so the tail gas will be sprayed, and then the particulate matter contained in the tail gas will be removed and fall downward. The tail gas after removing the particulate matter will rise and pass through the exhaust pipe 4, and then the activated carbon filter screen in the exhaust pipe 4 will purify the tail gas, and then it can be discharged outwards;

[0029] The water sprayed downwards will mix with the particles and fall onto the filter 9, where the particles are filtered and the filtered water will fall to the bottom. When the filter 9 needs to be cleaned or replaced after long-term use, the pull plate 15 needs to be pulled outwards to drive the arc plate 12 to rotate along the support 11, so that the embedded groove is opened and the filter 9 can be pulled outwards, so that the filter 9 can be taken out for replacement or cleaning.

[0030] When recycling the circulating water, since the particles will settle at the bottom, the water in the upper layer will basically not contain any particles. The buoyancy of the floating block 17 itself will cause the movable tube 16 to move upward, and the leakage hole 18 will always be located at the highest point of the liquid surface. Therefore, only the water in the upper layer will be recycled, thereby minimizing the blockage of the nozzle 8 due to particles.

[0031] To sum up, when installing the filter 9, the graphitization furnace exhaust gas circulation purification device only needs to push the arc plate 12 in the direction to rotate and embed it into the groove. At this time, the groove in the arc plate 12 will be buckled on the outside of the nozzle 8 to position it, and then the sealing gasket 14 will be in close contact with the inner wall of the groove to improve the sealing performance. By pulling the pull plate 15 outward, the arc plate 12 can be driven to open and expose the groove. At this time, the filter 9 can be conveniently taken out for replacement or cleaning.

[0032] The movable tube 16 will move upward through the buoyancy of the float 17 itself, so that the leakage hole 18 will always be located at the highest point of the liquid surface, and only the top layer of water will be recycled, and the particles will settle down to the bottom, and the top layer of water will basically not contain particles, thereby minimizing the blockage of the nozzle 8 due to particles in the recycled water.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The standard parts used in the utility model can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0035] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A tail gas circulation purification device for a graphitization furnace, comprising a purification tank (1), characterized in that: A tail gas circulation purification device for a graphitization furnace, comprising a purification tank (1) and a circulating water tank. Legs (2) are fixedly installed on the outer side of the bottom of the purification tank (1). An air inlet pipe (3) is communicated with one side of the top of the purification tank (1). An exhaust pipe (4) is communicated with the other side of the purification tank (1) opposite to the air inlet pipe (3). An activated carbon filter screen is installed inside the end of the exhaust pipe (4), and the exhaust pipe (4) is higher than the air inlet pipe (3). A water inlet pipe (5) is fixedly communicated with the center of the top of the purification tank (1). A drain pipe (6) is fixedly communicated with the center of the bottom of the purification tank (1), and the other ends of the water inlet pipe (5) and the drain pipe (6) are respectively communicated into the circulating water tank through a water pump. An annular water guide pipe (7) is fixedly installed at the bottom end of the water inlet pipe (5) inside the purification tank (1). A plurality of spray heads (8) are arranged in an array at the bottom of the annular water guide pipe (7). An embedding groove is formed in the middle of the purification tank (1). A filter screen (9) is installed inside the purification tank (1) through the embedding groove. A convenient disassembly and assembly component (10) is arranged outside the purification tank (1) at the embedding groove. An active drainage component is arranged at the top of the drain pipe (6) inside the purification tank (1).

2. The graphite furnace tail gas circulation purification device according to claim 1, characterized in that: The convenient disassembly and assembly component (10) includes a support (11) fixedly installed outside the purification tank (1) and at the end of the embedding groove. An arc plate (12) is rotatably connected inside the support (11). An inner embedding plate (13) is fixedly installed on the inner arc side of the arc plate (12). Sealing gaskets (14) are arranged on both the upper and lower sides of the inner embedding plate (13). A pull plate (15) is fixedly installed on the outer side of the end of the arc plate (12) away from the support (11).

3. The graphitization furnace tail gas circulation purification device according to claim 2, characterized in that: The cross-section of the arc plate (12) is in a "concave" shape. The arc plate (12) is tightly embedded in the embedding groove through the sealing gasket (14), and the filter screen (9) is embedded in the groove of the arc plate (12).

4. The graphitization furnace tail gas circulation purification device according to claim 2, characterized in that: The pull plate (15) is in a bent shape, and the included angle at the bent part is an obtuse angle.

5. The graphitization furnace tail gas circulation purification device according to claim 1, characterized in that: The active drainage component includes a movable pipe (16) inserted into the top of the drain pipe (6). A floating block (17) is fixedly installed at the top end of the movable pipe (16). A plurality of leakage holes (18) are arranged in an array on the outer side of the top of the movable pipe (16). A fine filter screen (19) is arranged on the inner wall of the movable pipe (16) at the leakage holes (18).

6. The graphitization furnace tail gas circulation purification device according to claim 5, characterized in that: Limiting strips (20) are symmetrically and fixedly installed on the outer side of the movable pipe (16). Two limiting grooves (21) are formed in the inner wall of the drain pipe (6) corresponding to the two limiting strips (20), and the limiting strips (20) are slidably inserted into the limiting grooves (21).

7. The graphitization furnace tail gas circulation purification device according to any one of claims 1-6, characterized in that: Installation grooves (22) are formed in the inner wall of the purification tank (1) corresponding to the embedding grooves. Clamping plates (23) are fixedly installed at the two ends of the installation grooves (22) on the inner wall of the purification tank (1), and the clamping plates (23) on each side are symmetrically arranged up and down. The inner sides of the upper and lower clamping plates (23) are chamfered inward.

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