Casting kiln flue gas treatment device and flue gas treatment method

Abstract

The invention belongs to the related technical field of flue gas treatment, and particularly discloses a casting kiln flue gas treatment device which comprises a bottom table, a mounting frame is arranged on the upper end face of the bottom table, a flue gas treatment tank is arranged in the mounting frame, and a gas inlet pipe is arranged at the position, close to the lower portion, of the outer portion of the flue gas treatment tank. The gas inlet pipe is in a circular ring shape, the interior of the gas inlet pipe communicates with the flue gas treatment tank through multiple sets of circulation openings, a suction recycling mechanism is arranged on one side of the interior of the flue gas treatment tank, fixing frames are arranged in the flue gas treatment tank in the circumferential direction at equal intervals, and hammering assemblies are arranged on the inner sides of the fixing frames; according to the flue gas treatment device, when flue gas is treated, dust can be subjected to impurity removal and guided to the outside, and then the flue gas is guided to waste heat recovery equipment for secondary utilization through a suction recovery mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field related to fume treatment, and specifically discloses a fume treatment device and a fume treatment method for a casting kiln. Background Art

[0002] Casting kiln is a thermal equipment used for metal melting, heat preservation, heating and other processes in the casting process. Casting kiln mainly heats metal by burning fuel or using electricity to generate high temperature; Common fuels include coal, oil, natural gas, etc. The high temperature generated by combustion is transferred to the metal material through conduction, radiation and convection in the furnace, causing its temperature to gradually increase. For electrically heated casting furnaces, such as resistance furnaces and induction furnaces, electrical energy is converted into heat energy that directly acts on the metal to achieve efficient heating.

[0003] Since the kiln generates a lot of flue gas with high temperature during use, the existing device contains a lot of impurities in the flue gas when recycling it. After a period of continuous use, a lot of impurities will be attached to the surface of the flue gas pipe and the subsequent flue gas waste heat device, which is not conducive to the use of the equipment. Therefore, we need to make improvements. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the background technology, and a fume treatment device for a casting kiln is proposed, comprising a base, a mounting frame is arranged on the upper surface of the base, a fume treatment tank is arranged inside the mounting frame, an air intake pipe is arranged outside the fume treatment tank and near the lower position, the air intake pipe is annular and is connected with the fume treatment tank through multiple groups of flow ports opened inside, a suction recovery mechanism is arranged on one side of the inside of the fume treatment tank, a fixing frame is arranged at equal distances along the circumferential direction inside the fume treatment tank, a hammer assembly is arranged inside the fixing frame, a circular frame is slidably installed on the outer side of multiple groups of the fixing frames, and a blocking member is arranged inside the circular frame; A pulling mechanism is arranged above the interior of the flue gas treatment tank, and the pulling mechanism is connected to the blocking member, and can prompt the impurities blocked by the lower end surface of the blocking member to fall.

[0005] Preferably, the suction recovery mechanism includes an induced air fan, a closed platform is set up on one side of the inside of the flue gas treatment tank, the suction end of the induced air fan is connected to a recovery pipe, and the end of the recovery pipe away from the induced air fan passes through the closed platform and extends to the inside of the flue gas treatment tank.

[0006] Preferably, the hammer assembly includes rotating rods rotatably mounted on the upper and lower ends of the fixed frame respectively, and striking hammers are mounted on the outside of the two rotating rods. A clamping sleeve is arranged on the outside of the striking hammers, and the outside of the fixed frame and the side close to the striking hammer are connected to the clamping sleeve through an elastic rod.

[0007] Preferably, the blocking member comprises an elastic filter membrane installed inside a circular frame, and suspension rods are centrally symmetrically arranged on the upper edge of the circular frame, and two of the suspension rods are connected to the pulling mechanism.

[0008] Preferably, the pulling mechanism includes branch ropes respectively installed on the outside of the suspension rod, the two branch ropes overlap at one end close to each other and are connected to a pulling rope at the end, a pulling mechanism is provided at the upper end of the pulling rope, a frame rod is fixedly mounted on the upper part of the flue gas treatment tank, a cylinder is fixedly inserted in the middle of the frame rod, a plurality of balls are installed on the inner wall of the cylinder, one end of the pulling rope passes through the interior of the cylinder and rolls and fits with the inner wall of the plurality of balls.

[0009] Preferably, the pulling mechanism includes fixed blocks respectively fixedly mounted on the inner walls on both sides of the flue gas treatment tank, guide rollers are respectively arranged between the two groups of the fixed blocks, the guide rollers are arranged in an obliquely symmetrical manner, and pulleys are rotatably installed in the middle of the outer sides of the guide rollers, one end of the pull rope passes through between the two groups of pulleys and the end portion extends to the outside of the flue gas treatment tank, a sliding tube is arranged inside the flue gas treatment tank and outside the pull rope, a resistance plate is slidably installed inside the sliding tube, the pull rope is inserted into the resistance plate and a sliding rod is mounted on the end portion, a bracket is slidably installed on the inner side of the sliding rod, a cylinder is arranged on the inner wall of the bracket, and the telescopic end of the cylinder is fixedly connected to the sliding rod.

[0010] Preferably, a dust accumulation mechanism is provided at the lower inner side of the flue gas treatment tank, the dust accumulation mechanism includes a slide cylinder arranged at equal distances along the circumferential direction at the bottom of the flue gas treatment tank, a guide rod is slidably installed on the upper inner part of the slide cylinder, a spring is mounted on the outer side of the guide rod, the upper end of the guide rod is connected to the ash hopper, a bottom rod is provided on the lower end surface of the elastic filter membrane and near the middle, a clamping cylinder is fixedly provided at the lower end of the bottom rod, a mounting rod is fixedly provided at the lower end of the clamping cylinder, a touch ring is fixedly provided at the bottom of the mounting rod, the touch ring is movably abutted against the inner wall of the ash hopper, a discharge pipe is installed at the lower inner part of the ash hopper, a buffer cylinder is installed on the outside of one end of the discharge pipe and near the ash hopper, and the ash hopper and the buffer cylinder are slidably matched.

[0011] A method for treating fume from a foundry kiln is provided, which uses the above-mentioned fume treatment device for a foundry kiln and includes the following construction methods: S1. Connect the kiln flue gas pipe to the air inlet pipe. The flue gas enters the flue gas treatment tank and flows upward. The flue gas is filtered by the elastic filter membrane to block the impurities inside. S2, the induced air fan is connected through the recovery pipe to suck the filtered flue gas, and then the exhaust end of the induced air fan is connected to the waste heat recovery equipment to utilize the waste heat in the flue gas; S3. In order to ensure the effect of flue gas treatment, the elastic filter membrane needs to be cleaned regularly. To ensure the cleaning effect of the elastic filter membrane, the cylinder drives the slide bar to move to one end, so that the slide bar drives the contact plate and the pull rope to pull up the suspension rod at the upper end of the round frame, so that the round frame moves upward, so that the elastic filter membrane can contact the hammer at the upper end of the fixed frame, thereby vibrating the elastic filter membrane, and then the pull rope is retracted to allow the elastic filter membrane to contact the hammer at the lower end of the fixed frame, and so on, so that the impurities blocked by the lower end surface of the elastic filter membrane can be shaken off; S4. Then the impurities fall into the ash hopper and are discharged to the outside of the flue gas treatment tank through the impurity discharge pipe. Under the contact between the bottom rod and the mounting rod, the touch ring can be in active contact with the inner wall of the ash hopper during the up and down movement of the round frame. Under the elastic setting of the spring, all the impurities can be discharged.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The elastic filter membrane can be used in conjunction with the percussion hammers at the upper and lower ends of the fixed frame. When pulled by the pull rope, the round frame will drive the elastic filter membrane to move up and down, thereby contacting the percussion hammer at the corresponding position. The percussion hammer and the elastic filter membrane will collide with the elastic filter membrane, so that the impurities blocked by the lower end surface of the elastic filter membrane can be shaken off into the ash hopper, and then the ash hopper discharges the impurities to the outside through the impurity discharge pipe.

[0013] 2. As the round frame moves up and down, the bottom rod, the cartridge and the mounting rod will drive the lower end collision ring to intermittently contact the inner wall of the ash hopper. As a result, the ash hopper will shake the impurities attached to the inner wall of the ash hopper under the contact of the spring, and then discharge all the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall connection structure of the present invention from another angle; Figure 3 This is a schematic diagram of the air intake pipe structure of the present invention; Figure 4 It is a schematic diagram of the connection structure between the circular frame and the elastic filter membrane of the present invention; Figure 5 for Figure 4 Another perspective structural diagram of; Figure 6 This is a schematic diagram of the feed hopper connection structure of the present invention; Figure 7 It is a schematic diagram of the connection structure between the fixing block and the bracket of the present invention.

[0015] In the figure: 1. base; 2. mounting frame; 3. air inlet pipe; 4. flue gas treatment tank; 5. bracket; 6. slide bar; 7. closing table; 8. exhaust fan; 9. recovery pipe; 10. ash hopper; 11. slide cylinder; 12. round frame; 13. rack rod; 14. pull rope; 15. fixed block; 16. guide roller; 17. flow port; 18. cylinder; 19. suspension rod; 20. fixed frame; 21. rotating rod; 22. bottom rod; 23. branch rope; 24. ferrule; 25. knock hammer; 26. ball; 27. elastic filter membrane; 28. cartridge; 29. ​​mounting rod; 30. touch ring; 31. spring; 32. exhaust pipe; 33. buffer cylinder; 34. pulley; 35. stop plate; 36. cylinder; 37. slide pipe. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] like Figure 1-Figure 7 A fume treatment device for a casting kiln shown in the figure comprises a base 1, a mounting frame 2 is arranged on the upper end surface of the base 1, a fume treatment tank 4 is arranged inside the mounting frame 2, an air inlet pipe 3 is arranged outside the fume treatment tank 4 and near the lower position, the air inlet pipe 3 is annular and is connected to the fume treatment tank 4 through multiple groups of flow ports 17 opened inside, a suction recovery mechanism is arranged on one side inside the fume treatment tank 4, a fixing frame 20 is arranged at equal distances inside the fume treatment tank 4 along the circumferential direction, a hammer assembly is arranged inside the fixing frame 20, a circular frame 12 is slidably installed on the outer sides of multiple groups of fixing frames 20, and a blocking member is arranged inside the circular frame 12; A pulling mechanism is arranged on the upper part of the interior of the flue gas treatment tank 4, and the pulling mechanism is connected to the blocking member, which can promote the impurities blocked by the lower end surface of the blocking member to fall.

[0019] The suction and recovery mechanism includes an induced air fan 8. A closed platform 7 is installed on one side of the interior of the flue gas treatment tank 4. A recovery pipe 9 is installed at the suction end of the induced air fan 8. The end of the recovery pipe 9 away from the induced air fan 8 passes through the closed platform 7 and extends to the interior of the flue gas treatment tank 4. The induced air fan 8 is connected to the interior of the flue gas treatment tank 4 through the recovery pipe 9, so that the exhausted flue gas can be drained. The closed platform 7 improves the sealing of the connection between the recovery pipe 9 and the flue gas treatment tank 4.

[0020] The hammer assembly includes rotating rods 21 rotatably installed at the upper and lower ends of the fixed frame 20 respectively, and striking hammers 25 are installed on the outside of the two rotating rods 21. A clamping sleeve 24 is arranged on the outside of the striking hammer 25, and the outside of the fixed frame 20 and the side close to the striking hammer 25 are connected to the clamping sleeve 24 through an elastic rod. The elastic rod is supported on one side of the clamping sleeve 24. When the blocking member conflicts with the striking hammer 25, the elastic rod can ensure that the striking hammer 25 is more flexible when in contact, and can cooperate to involve the striking hammer 25, so that the striking hammer 25 continues to shake.

[0021] The blocking member includes an elastic filter membrane 27 installed inside the circular frame 12. The upper edge of the circular frame 12 is provided with a suspension rod 19 in a centrally symmetrical manner. The two suspension rods 19 are connected to the pulling mechanism. The pulling mechanism includes branch ropes 23 respectively installed on the outside of the suspension rods 19. The branch ropes 23 are two groups of ropes connected to the respective suspension rods 19. The ends of the two branch ropes 23 that are close to each other overlap above and are connected to the pull rope 14 at the ends. The upper end of the pull rope 14 is provided with a pulling mechanism. When pulled down, the pull rope 14 can pull the suspension rod 19 at the lower end, thereby driving the round frame 12 and the elastic filter membrane 27 to move up and down. A rack 13 is fixedly mounted on the upper part of the flue gas treatment tank 4. A cylinder 18 is fixedly inserted in the middle of the rack 13. A plurality of balls 26 are installed on the inner wall of the cylinder 18. One end of the pull rope 14 passes through the inside of the cylinder 18 and rolls with the inner wall of the plurality of balls 26. The plurality of balls 26 are arranged inside the cylinder 18 to cooperate with the pull rope 14 to slide inside. The elastic filter membrane 27 is a nylon filter membrane, and a filter membrane made of a similarly tough material can also be used.

[0022] The pulling mechanism includes fixed blocks 15 respectively fixedly mounted on the inner walls of both sides of the flue gas treatment tank 4, guide rollers 16 are respectively arranged between the two sets of fixed blocks 15, the guide rollers 16 are arranged obliquely symmetrically, and pulleys 34 are rotatably installed in the middle of the outer sides of the guide rollers 16. Under the sliding engagement of the guide rollers 16 and the pulleys 34, the pull rope 14 passes through the inside of the two sets of pulleys 34 close to each other, one end of the pull rope 14 passes between the two sets of pulleys 34 and the end extends to the outside of the flue gas treatment tank 4, and the inside of the flue gas treatment tank 4 and the pull rope 14 is located A slide tube 37 is arranged on the outside of the slide tube 37, and a disc 35 is slidably installed inside the slide tube 37. Under the clamping of the disc 35, the pull rope 14 can be stretched in the original position when being pulled by the slide rod 6, and the direction and trajectory of the pulling force are positioned, thereby making the pull rope 14 pull the suspension rod 19 more smoothly. The pull rope 14 is inserted into the disc 35 and the end thereof is covered with the slide rod 6. A bracket 5 is slidably installed inside the slide rod 6. A cylinder 36 is arranged on the inner wall of the bracket 5, and the telescopic end of the cylinder 36 is fixedly connected to the slide rod 6.

[0023] A dust accumulation mechanism is arranged at the lower inner side of the flue gas treatment tank 4, and the dust accumulation mechanism includes a slide cylinder 11 arranged at an equal distance at the bottom of the flue gas treatment tank 4 along the circumferential direction, a guide rod is slidably installed on the upper inner part of the slide cylinder 11, and a spring 31 is sleeved on the outer side of the guide rod, and the upper end of the guide rod is connected with an ash hopper 10. Under the connection between the slide cylinder 11 and the spring 31, the ash hopper 10 can vibrate by itself after being touched, and a bottom rod 22 is arranged on the lower end surface of the elastic filter membrane 27 and near the middle, and a cartridge 28 is fixedly arranged at the lower end of the bottom rod 22, and a mounting rod 29 is fixedly arranged at the lower end of the cartridge 28, and a touch ring 30 is fixedly arranged at the bottom of the mounting rod 29, and the touch ring 30 is movably abutted against the inner wall of the ash hopper 10, and the bottom rod 22 and the cartridge 2 When the circular frame 12 and the elastic filter membrane 27 are pressed down by the mounting rod 8 and the mounting rod 29, the touch ring 30 will be prompted to contact the inner wall of the ash hopper 10, thereby vibrating the impurities on the inner wall that are not easy to fall off, and in this way, all the impurities are discharged. A discharge pipe 32 is installed at the lower part of the ash hopper 10, and a buffer cylinder 33 is installed outside one end of the discharge pipe 32 and close to the ash hopper 10. The ash hopper 10 and the buffer cylinder 33 are slidably matched, and the buffer cylinder 33 can cooperate with the ash hopper 10 to slide downward, so that impurities can fall off, and then as the ash hopper 10 returns to its initial position under the elastic force, the impurities on the outside of the buffer cylinder 33 are pushed upward, and finally all are guided into the discharge pipe 32.

[0024] A method for treating fume from a foundry kiln is provided, which uses the above-mentioned fume treatment device for a foundry kiln and includes the following construction methods: S1. Connect the kiln flue gas pipeline to the air inlet pipe 3, and the flue gas enters the flue gas treatment tank 4 and flows upward. The flue gas is filtered by the elastic filter membrane 27 to block the impurities inside; S2, the induced air fan 8 is connected through the recovery pipe 9 to suck the filtered flue gas, and then the exhaust end of the induced air fan 8 is connected to the waste heat recovery equipment to utilize the waste heat in the flue gas; S3. In order to ensure the effect of flue gas treatment, the elastic filter membrane 27 needs to be cleaned regularly. To ensure the cleaning effect of the elastic filter membrane 27, the cylinder 36 drives the slide bar 6 to move to one end, so that the slide bar 6 drives the contact plate 35 and the pull rope 14 to pull up the suspension rod 19 at the upper end of the round frame 12, so that the round frame 12 moves upward, so that the elastic filter membrane 27 can contact the knocking hammer 25 at the upper end of the fixing frame 20, thereby vibrating the elastic filter membrane 27, and then the pull rope 14 is retracted to make the elastic filter membrane 27 contact the knocking hammer 25 at the lower end of the fixing frame 20, and so on and so forth, so that the impurities blocked by the lower end surface of the elastic filter membrane 27 can be shaken off; S4. Then the impurities fall into the ash hopper 10 and are discharged to the outside of the flue gas treatment tank 4 through the impurity discharge pipe 32. Under the contact between the bottom rod 22 and the mounting rod 29, the touch ring 30 can be in active contact with the inner wall of the ash hopper 10 during the up and down movement of the round frame 12. Under the elastic setting of the spring 31, all the impurities can be discharged.

[0025] Working principle: When in use, the kiln flue gas duct is connected to the air inlet pipe 3, and the flue gas enters the interior of the flue gas treatment tank 4 and flows upward with the suction of the exhaust fan 8. The flue gas is blocked by the elastic filter membrane 27, and the impurities in the flue gas can be processed. Then the processed flue gas is discharged through the recovery pipe 9, and the discharge end of the exhaust fan 8 is connected to the waste heat equipment to recover the waste heat. The impurities in the flue gas are blocked by the elastic filter membrane 27 and attached to the lower end surface of the elastic filter membrane 27. After the flue gas is discharged, the cylinder 36 can drive the slide bar 6 to move to the end away from the flue gas treatment tank 4, so that the slide bar 6 drives the stop plate 35 and the pull rope 14 to pull up the suspension rod 19 at the upper end of the round frame 12, so that the round frame 12 moves upward, so that the elastic filter membrane 27 can contact the striking hammer at the upper end of the fixed frame 20. 25 contacts, thereby vibrating the elastic filter membrane 27, and then the pull rope 14 is retracted to make the elastic filter membrane 27 hit against the knocking hammer 25 at the lower end of the fixing frame 20, and this is repeated repeatedly, so that the impurities blocked by the lower end surface of the elastic filter membrane 27 can be shaken off, and the impurities fall on the inner wall of the ash hopper 10 with the vibration, and the ash hopper 10 is guided to the inside of the impurity discharge pipe 32 through its own external structure, and then discharged through the impurity discharge pipe 32, and when the elastic filter membrane 27 moves downward, the bottom rod 22 and the mounting rod 29 can make the touch ring 30 contact with the ash hopper 10 when the round frame 12 moves downward, thereby the ash hopper 10 can slide on the outside of the buffer cylinder 33 under the elastic pressure of the spring 31 and the guide rod, so that the ash adhering to the inner wall of the ash hopper 10 can be completely discharged.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A fume treatment device for a casting kiln, comprising a base (1), characterized in that: The upper end surface of the base (1) is provided with a mounting frame (2), a flue gas treatment tank (4) is provided inside the mounting frame (2), an air intake pipe (3) is provided outside and near the bottom of the flue gas treatment tank (4), the air intake pipe (3) is annular and is connected to the flue gas treatment tank (4) through a plurality of flow openings (17) provided inside, a suction recovery mechanism is provided on one side inside the flue gas treatment tank (4), a fixing frame (20) is provided inside the flue gas treatment tank (4) at equal distances along the circumferential direction, a hammer assembly is provided inside the fixing frame (20), a circular frame (12) is slidably installed on the outside of a plurality of groups of the fixing frames (20), a blocking member is provided inside the circular frame (12); A pulling mechanism is arranged on the upper part of the interior of the flue gas treatment tank (4), and the pulling mechanism is connected to the blocking member, and can prompt the impurities blocked by the lower end surface of the blocking member to fall.

2. A fume treatment device for a casting kiln according to claim 1, characterized in that: The suction recovery mechanism comprises an induced air fan (8), a closed platform (7) is arranged on one side inside the flue gas treatment tank (4), a recovery pipe (9) is installed in communication with the suction end of the induced air fan (8), and an end of the recovery pipe (9) away from the induced air fan (8) passes through the closed platform (7) and extends to the inside of the flue gas treatment tank (4).

3. The fume treatment device for a casting kiln according to claim 2, characterized in that: The hammer assembly comprises rotating rods (21) rotatably mounted at the upper and lower ends of the interior of the fixing frame (20), respectively; a striking hammer (25) is mounted on the outside of the two rotating rods (21); a clamping sleeve (24) is arranged on the outside of the striking hammer (25); and a side of the fixing frame (20) close to the striking hammer (25) is connected to the clamping sleeve (24) via an elastic rod.

4. The fume treatment device for a casting kiln according to claim 3, characterized in that: The blocking member comprises an elastic filter membrane (27) installed inside a circular frame (12), and suspension rods (19) are centrally symmetrically arranged on the upper edge of the circular frame (12), and two of the suspension rods (19) are connected to a pulling mechanism.

5. The fume treatment device for a casting kiln according to claim 4, characterized in that: The pulling mechanism comprises branch ropes (23) respectively mounted on the outside of the suspension rod (19), the ends of the two branch ropes (23) being close to each other overlapped at the top and the ends being connected to a pulling rope (14), the upper end of the pulling rope (14) being provided with a pulling mechanism, a frame rod (13) being fixedly mounted on the top of the inside of the flue gas treatment tank (4), a cylinder (18) being fixedly inserted in the middle of the frame rod (13), a plurality of balls (26) being mounted on the inner wall of the cylinder (18), one end of the pulling rope (14) passing through the inside of the cylinder (18) and rollingly fitting with the inner wall of the plurality of balls (26).

6. The fume treatment device for a casting kiln according to claim 5, characterized in that: The pulling mechanism comprises fixed blocks (15) respectively fixedly mounted on the inner walls of both sides of the flue gas treatment tank (4), guide rollers (16) are respectively arranged between the two groups of the fixed blocks (15), the guide rollers (16) are arranged in an oblique symmetrical manner, and pulleys (34) are rotatably mounted in the middle of the outer sides of the guide rollers (16), one end of the pull rope (14) passes through between the two groups of pulleys (34) and the end portion extends to the outer side of the flue gas treatment tank (4), a sliding tube (37) is arranged inside the flue gas treatment tank (4) and outside the pull rope (14), a resistance plate (35) is slidably mounted inside the sliding tube (37), the pull rope (14) is inserted into the resistance plate (35) and the end portion is sleeved with a sliding rod (6), a bracket (5) is slidably mounted inside the sliding rod (6), a cylinder (36) is arranged on the inner wall of the bracket (5), and the telescopic end of the cylinder (36) is fixedly connected to the sliding rod (6).

7. A fume treatment device for a casting kiln according to claim 6, characterized in that: A dust accumulation mechanism is arranged at the lower inner side of the flue gas treatment tank (4), and the dust accumulation mechanism comprises a slide cylinder (11) arranged at equal distances along the circumferential direction at the bottom of the flue gas treatment tank (4), a guide rod is slidably mounted on the upper inner side of the slide cylinder (11), a spring (31) is sleeved on the outer side of the guide rod, the upper end of the guide rod is connected to the dust accumulation hopper (10), a bottom rod (22) is arranged at the lower end surface of the elastic filter membrane (27) and near the middle, and a cartridge (20) is fixedly arranged at the lower end of the bottom rod (22). 8), a mounting rod (29) is fixedly provided at the lower end of the cartridge (28), a touch ring (30) is fixedly provided at the bottom of the mounting rod (29), the touch ring (30) is movably abutted against the inner wall of the ash hopper (10), a debris discharge pipe (32) is installed in communication with the lower part of the ash hopper (10), a buffer cylinder (33) is installed outside one end of the debris discharge pipe (32) and near the ash hopper (10), and the ash hopper (10) and the buffer cylinder (33) are slidably matched.

8. A method for treating fume from a foundry kiln, using the fume treatment device for a foundry kiln according to claim 7, comprising the following construction method: S1. Connect the kiln flue gas pipeline to the air inlet pipe (3), and the flue gas enters the flue gas treatment tank (4) and flows upward. The flue gas is filtered by the elastic filter membrane (27) to block the impurities inside. S2, the induced air fan (8) is connected to the recovery pipe (9) to suck the filtered flue gas, and then the exhaust end of the induced air fan (8) is connected to the waste heat recovery equipment to utilize the waste heat in the flue gas; S3. In order to ensure the effect of flue gas treatment, it is necessary to regularly remove impurities from the elastic filter membrane (27). To ensure the effect of removing impurities from the elastic filter membrane (27), the cylinder (36) drives the slide bar (6) to move toward one end, so that the slide bar (6) drives the contact plate (35) and the pull rope (14) to pull up the suspension rod (19) at the upper end of the circular frame (12), so that the circular frame (12) moves upward, so that the elastic filter membrane (27) can contact the knocking hammer (25) at the upper end of the fixed frame (20), thereby vibrating the elastic filter membrane (27), and then the pull rope (14) is retracted to allow the elastic filter membrane (27) to contact the knocking hammer (25) at the lower end of the fixed frame (20), and so on, so that the impurities blocked by the lower end surface of the elastic filter membrane (27) can be shaken off; S4. The impurities then fall into the ash hopper (10) and are discharged to the outside of the flue gas treatment tank (4) through the impurity discharge pipe (32). Under the contact between the bottom rod (22) and the mounting rod (29), the touch ring (30) can be moved up and down in the process of the circular frame (12) to come into active contact with the inner wall of the ash hopper (10). Under the elastic setting of the spring (31), all the impurities can be discharged.

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