Tail gas purification device

Abstract

The utility model discloses a tail gas purification device and aims to solve the problems that in the prior art, the surface of a filter screen is stained with a large amount of dust to cause blockage of the filter screen, so that the tail gas purification treatment progress is reduced, the waste gas filtering effect is greatly reduced, and the blockage of the filter screen needs to be stopped for cleaning; the continuous purification of the waste gas is influenced. The tail gas purification device comprises a waste gas incinerator, a draught fan is installed on the outer surface of the waste gas incinerator, an exhaust pipe and an exhaust pipe are installed at the two ends of the draught fan, the exhaust pipe communicates with the waste gas incinerator, a heat exchange pipe is installed at the right end of the waste gas incinerator in a penetrating mode, and a water tank is arranged outside the waste gas incinerator and communicates with the heat exchange pipe. By means of the design, automatic cleaning without shutdown is achieved, continuous purification of waste gas is guaranteed, the filter screen is prevented from being blocked, and the treatment progress and the filtering effect of tail gas purification are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of tail gas treatment, and particularly relates to a tail gas purification device. Background Art

[0002] When treating the waste gas and tail gas after garbage incineration, due to certain impurities in the waste gas and tail gas, after a period of time, a large amount of dust will adhere to the surface of the filter screen in the tail gas purification device, which will cause impurities to remain on the filter screen. If the impurities on the filter screen are not processed in time, the filter screen will be blocked, thereby reducing the treatment progress of tail gas purification, greatly reducing the waste gas filtration effect, and the filter screen blockage requires shutdown for cleaning, affecting the continuous purification of waste gas. Therefore, a new type of tail gas purification device is designed to change the above technical defects. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a tail gas purification device, which aims to solve the technical problems that a large amount of dust will adhere to the surface of the filter screen in the prior art, causing the filter screen to be blocked, thereby reducing the treatment progress of tail gas purification, greatly reducing the waste gas filtration effect, and the filter screen blockage requires shutdown for cleaning, affecting the continuous purification of waste gas.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the utility model provides such a tail gas purification device, which includes a waste gas incinerator. A blower is installed on the outer surface of the waste gas incinerator, and an air suction pipe and an exhaust pipe are installed at both ends of the blower. The exhaust pipe is communicated with the waste gas incinerator. A heat exchange pipe is installed through the right end of the waste gas incinerator. A water tank is arranged outside the waste gas incinerator, and the heat exchange pipe is communicated with the water tank. A spiral spray pipe is installed through the top of the water tank, and a water delivery pipe is arranged inside the spiral spray pipe. Spray heads are installed through the outer surface of the water delivery pipe. A water pump is installed on the outer surface of the water tank. A drain pipe is installed through the outer surface of the water tank, and both ends of the drain pipe are fixedly connected to the bottom end of the water delivery pipe and the output end of the water pump respectively. The input end of the water pump is fixedly connected with a water inlet pipe, and the bottom end of the water inlet pipe is communicated with the water tank. An inclined filter plate is installed inside the water tank. A heat exchange shell is fixedly connected to the outer surface of the heat exchange pipe, and a water inlet flange and a drain flange are installed through the outer surface of the heat exchange shell.

[0007] When using the tail gas purification device of this technical solution, the exhaust pipe is connected to the tail gas discharge port, and then a fan is used to extract the waste gas and discharge it into the waste gas incinerator through the exhaust pipe to burn the combustible tail gas for treatment. After combustion, the tail gas enters the inside of the water tank through the heat exchange pipe. The water source is introduced into the heat exchange shell through the water inlet flange and flows out from the drain flange. When the water source flows through the heat exchange shell, it exchanges heat with the high-temperature tail gas in the heat exchange pipe to realize the recovery of the tail gas heat. After combustion, the tail gas enters the water tank and rotates and flows out in the spiral spray pipe. The water pump is powered on and starts to extract the purified liquid in the water tank through the water inlet pipe, enters the water delivery pipe through the drain pipe, and sprays out from the spray head. The spray head sprays the purified liquid to spray and purify the tail gas. By extending the travel of the tail gas with the spiral spray pipe and cooperating with the spray head and the water delivery pipe, the spray purification effect is ensured. The sprayed water falls from the spiral spray pipe onto the inclined filter plate, filters and falls to the bottom of the water tank, and then is extracted by the water pump, realizing the recycling of the purified liquid, improving the utilization rate of the purified liquid, avoiding the frequent replacement of the purified liquid, and effectively realizing the continuous purification of the tail gas. Through the setting of the inclined filter plate, the impurities falling on the inclined filter plate automatically move towards the lower end of the inclined filter plate under the flow of the purified liquid, preventing the inclined filter plate from being blocked.

[0008] Preferably, a water dropping tray is installed inside the water tank. Through the setting of the water dropping tray, the purified liquid is concentrated and falls to the upper end of the inclined filter plate, so that the impurities in the purified liquid can flow better towards the lower end under the action of the inclination of the inclined filter plate.

[0009] Furthermore, a maintenance door is installed through the outer surface of the water tank, and the material of the maintenance door is tempered glass. Through the setting of the tempered glass maintenance door, it is convenient to observe the amount of impurities on the inclined filter plate in the water tank, and opening the glass maintenance door can clean the impurities on the inclined filter plate.

[0010] Further, a delivery pipe is installed at one end of the suction pipe away from the fan, and a filter box is installed through the middle of the delivery pipe. A sliding table is arranged inside the filter box, and two installation grooves are formed on the outer surface of the sliding table. A filter screen is arranged inside the installation groove, a limiting groove is formed on the inner wall of the installation groove, and a positioning strip is rotatably installed inside the limiting groove. A threaded hole is formed inside the sliding table, a lead screw is installed through the outer surface of the filter box, a stepper motor is fixedly connected to the outer surface of the filter box, and the output end of the stepper motor is fixedly connected to the lead screw. A sealing door is installed through the outer surface of the filter box. An air pump is arranged below the delivery pipe, a double-headed pipe is installed at the output end of the air pump, and the top end of the double-headed pipe is installed through the filter box. A dust discharge pipe is installed through the outer surface of the sealing door, and a dust bag is installed at the bottom end of the dust discharge pipe. Through the arrangement of the sliding table and the filter screen, during use, the stepper motor is periodically started to drive the lead screw to rotate in the threaded hole to drive the sliding table to move inside the filter box. When the sliding table moves, the delivery pipe communicates with one of the installation grooves, and the tail gas is filtered by the filter screen. The other installation groove and the filter screen filled with impurities inside it are separated from the delivery pipe. The air pump is powered on and started to blow air reversely to the filter screen separated from the delivery pipe through the double-headed pipe. The impurities in the filter screen are blown into the dust bag through the dust discharge pipe for collection, realizing automatic cleaning without shutting down the machine, ensuring the continuous purification of waste gas, preventing the filter screen from being blocked by dust, and ensuring the treatment progress and filtering effect of tail gas purification.

[0011] (3) Beneficial effects

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The utility model connects the air extraction pipe with the tail gas discharge port, and then uses a blower to extract the waste gas and discharge it into the waste gas incinerator through the exhaust pipe to burn the combustible tail gas for treatment. After combustion, the tail gas enters the interior of the water tank through the heat exchange pipe. The water source is introduced into the heat exchange shell through the water inlet flange and flows out from the drain flange. When the water source flows in the heat exchange shell, it exchanges heat with the high-temperature tail gas in the heat exchange pipe, realizing the recovery of the heat of the tail gas. After combustion, the tail gas enters the water tank and rotates and flows out in the spiral spray pipe. The water pump is powered on and starts to extract the purified liquid in the water tank through the water inlet pipe, enters the water delivery pipe through the drain pipe, and sprays out from the spray head. The purified liquid sprayed out by the spray head sprays and purifies the tail gas. By extending the travel of the tail gas through the spiral spray pipe and cooperating with the spray head and the water delivery pipe, the spray purification effect is ensured. The spray water falls from the spiral spray pipe onto the inclined filter plate, filters and falls to the bottom of the water tank, and then is extracted by the water pump, realizing the recycling of the purified liquid, improving the utilization rate of the purified liquid, avoiding the frequent replacement of the purified liquid, and effectively realizing the continuous purification of the tail gas. Through the setting of the inclined filter plate, the impurities falling into the inclined filter plate automatically move towards the lower end of the inclined filter plate under the flow of the purified liquid, preventing the inclined filter plate from being blocked. The stepping motor is started regularly to drive the screw rod to rotate in the screw hole, driving the sliding table to move in the filter box. When the sliding table moves, the delivery pipe is communicated with one of the installation grooves to filter the tail gas through the filter screen, and the other installation groove and the filter screen filled with impurities inside are separated from the delivery pipe. The air pump is powered on and starts to blow air reversely into the filter screen separated from the delivery pipe through the double-headed pipe. The impurities in the filter screen are blown by the wind and enter the ash bag through the ash discharge pipe for collection, realizing automatic cleaning without stopping the machine, ensuring the continuous purification of the waste gas, preventing the filter screen from being blocked, and ensuring the treatment progress and filtration effect of the tail gas purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of the tail gas purification device of the utility model;

[0015] Figure 2 is a side view structural schematic diagram of the filter box of the tail gas purification device of the utility model;

[0016] Figure 3 is an internal structural schematic diagram of the filter box of the tail gas purification device of the utility model;

[0017] Figure 4 is a sectional structural schematic diagram of the spiral spray pipe and the water tank of the tail gas purification device of the utility model;

[0018] Figure 5 is a three-dimensional structural schematic diagram of the spray head and the water delivery pipe of the tail gas purification device of the utility model;

[0019] Figure 6 is a three-dimensional structural schematic diagram of the sliding table of the tail gas purification device of the utility model;

[0020] Figure 7 is a three-dimensional structural schematic diagram of the water tank of the tail gas purification device of the utility model.

[0021] The reference numerals in the drawings are: 1, waste gas incinerator; 2, drain flange; 3, heat exchange shell; 4, water inlet flange; 5, spiral spray pipe; 6, water tank; 7, drain pipe; 8, water pump; 9, water inlet pipe; 10, heat exchange pipe; 11, air pump; 12, double-headed pipe; 13, ash bag; 14, filter box; 15, delivery pipe; 16, stepper motor; 17, ash discharge pipe; 18, air extraction pipe; 19, fan; 20, exhaust pipe; 21, sealing door; 22, lead screw; 23, threaded hole; 24, positioning strip; 25, limit groove; 26, installation groove; 27, sliding table; 28, filter screen; 29, spray head; 30, water delivery pipe; 31, inspection door; 32, water falling tray; 33, inclined filter plate. Specific Embodiment

[0022] This specific embodiment is a tail gas purification device, and its structural schematic diagram is as Figures 1-7 shown. The tail gas purification device includes a waste gas incinerator 1. A fan 19 is installed on the outer surface of the waste gas incinerator 1, and an air extraction pipe 18 and an exhaust pipe 20 are installed at both ends of the fan 19. The exhaust pipe 20 is communicated with the waste gas incinerator 1. A heat exchange pipe 10 is installed through the right end of the waste gas incinerator 1. A water tank 6 is arranged outside the waste gas incinerator 1, and the heat exchange pipe 10 is communicated with the water tank 6. A spiral spray pipe 5 is installed through the top end of the water tank 6, and a water delivery pipe 30 is arranged inside the spiral spray pipe 5. Spray heads 29 are installed through the outer surface of the water delivery pipe 30. A water pump 8 is installed on the outer surface of the water tank 6. A drain pipe 7 is installed through the outer surface of the water tank 6, and both ends of the drain pipe 7 are fixedly connected to the bottom end of the water delivery pipe 30 and the output end of the water pump 8 respectively. The input end of the water pump 8 is fixedly connected to a water inlet pipe 9, and the bottom end of the water inlet pipe 9 is communicated with the water tank 6. An inclined filter plate 33 is installed inside the water tank 6. A heat exchange shell 3 is fixedly connected to the outer surface of the heat exchange pipe 10. A water inlet flange 4 and a drain flange 2 are installed through the outer surface of the heat exchange shell 3.

[0023] Among them, a water falling tray 32 is installed inside the water tank 6. Through the arrangement of the water falling tray 32, the purified liquid is concentrated and falls to the high end of the inclined filter plate 33, so that the impurities in the purified liquid can flow better to the low end under the action of the inclination of the inclined filter plate 33. An inspection door 31 is installed through the outer surface of the water tank 6, and the material of the inspection door 31 is tempered glass. Through the arrangement of the tempered glass inspection door 31, it is convenient to observe the amount of impurities on the inclined filter plate 33 in the water tank 6, and the impurities on the inclined filter plate 33 can be cleaned by opening the glass inspection door 31.

[0024] In addition, a delivery pipe 15 is installed at one end of the air extraction pipe 18 away from the blower 19, and a filter box 14 is installed through the middle of the delivery pipe 15. A sliding table 27 is arranged inside the filter box 14, and two mounting grooves 26 are formed on the outer surface of the sliding table 27. A filter screen 28 is arranged inside the mounting groove 26. A limiting groove 25 is formed on the inner wall of the mounting groove 26, and a positioning strip 24 is rotatably installed inside the limiting groove 25. A threaded hole 23 is formed inside the sliding table 27. A lead screw 22 is installed through the outer surface of the filter box 14. A stepping motor 16 is fixedly connected to the outer surface of the filter box 14, and the output end of the stepping motor 16 is fixedly connected to the lead screw 22. A sealing door 21 is installed through the outer surface of the filter box 14. An air pump 11 is arranged below the delivery pipe 15. The output end of the air pump 11 is installed with a double-headed pipe 12, and the top end of the double-headed pipe 12 is installed through the filter box 14. A dust discharge pipe 17 is installed through the outer surface of the sealing door 21, and an ash bag 13 is installed at the bottom end of the dust discharge pipe 17. Through the arrangement of the sliding table 27 and the filter screen 28, during use, the stepping motor 16 is periodically started to drive the lead screw 22 to rotate in the threaded hole 23 to drive the sliding table 27 to move inside the filter box 14. When the sliding table 27 moves, the delivery pipe 15 is communicated with one of the mounting grooves 26 to filter the tail gas through the filter screen 28, and the other mounting groove 26 and the filter screen 28 filled with impurities inside are separated from the delivery pipe 15. The air pump 11 is powered on and started to blow air reversely to the filter screen 28 separated from the delivery pipe 15 through the double-headed pipe 12. The impurities in the filter screen 28 are blown by the wind and enter the ash bag 13 through the dust discharge pipe 17 for collection, realizing automatic cleaning without shutting down, ensuring the continuous purification of waste gas, preventing the filter screen 28 from being blocked by dust, and ensuring the treatment progress and filtering effect of tail gas purification.

[0025] Working principle: When using the tail gas purification device of this technical solution, connect the suction pipe 18 to the tail gas discharge port, and then use the fan 19 to extract the waste gas and discharge it into the waste gas incinerator 1 through the exhaust pipe 20 to burn the combustible tail gas for treatment. After combustion, the tail gas enters the interior of the water tank 6 through the heat exchange pipe 10. The water source is introduced into the heat exchange shell 3 through the inlet flange 4 and flows out from the drain flange 2. When the water source flows in the heat exchange shell 3, it exchanges heat with the high-temperature tail gas in the heat exchange pipe 10 to realize the recovery of the tail gas heat. After combustion, the tail gas enters the water tank 6 and rotates and flows out in the spiral spray pipe 5. The water pump 8 is powered on and starts to extract the purified liquid in the water tank 6 through the water inlet pipe 9, enters the water delivery pipe 30 through the drain pipe 7, and sprays out from the spray head 29. The spray head 29 sprays the purified liquid to spray and purify the tail gas. By extending the travel of the tail gas with the spiral spray pipe 5 and cooperating with the spray head 29 and the water delivery pipe 30, the spray purification effect is ensured. The sprayed water falls from the spiral spray pipe 5 onto the inclined filter plate 33, filters and falls to the bottom of the water tank 6, and then is extracted by the water pump 8, realizing the recycling of the purified liquid, improving the utilization rate of the purified liquid, avoiding the frequent replacement of the purified liquid, and effectively realizing the continuous purification of the tail gas. Through the setting of the inclined filter plate 33, the impurities falling into the inclined filter plate 33 automatically move towards the lower end of the inclined filter plate 33 under the flow of the purified liquid, preventing the inclined filter plate 33 from being blocked. The stepping motor 16 is started regularly to drive the lead screw 22 to rotate in the threaded hole 23, driving the sliding table 27 to move in the filter box 14. When the sliding table 27 moves, the delivery pipe 15 communicates with one of the mounting grooves 26, and the tail gas is filtered through the filter screen 28. The other mounting groove 26 and the filter screen 28 filled with impurities inside are separated from the delivery pipe 15. The air pump 11 is powered on and starts to blow air in the reverse direction to the filter screen 28 separated from the delivery pipe 15 through the double-headed pipe 12. The impurities in the filter screen 28 are blown by the wind and enter the ash bag 13 through the ash discharge pipe 17 for collection, realizing automatic cleaning without stopping the machine, ensuring the continuous purification of the waste gas, preventing the filter screen 28 from being blocked, and ensuring the treatment progress and filtering effect of the tail gas purification.

[0026] All technical features in this embodiment can be freely combined according to actual needs.

[0027] The above embodiment is a preferred implementation scheme of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of this technical solution is within the protection scope of the present utility model.

Claims

1. An exhaust gas purification device, the exhaust gas purification device comprising an exhaust gas incinerator (1), characterized in that: A blower (19) is installed on the outer surface of the waste gas incinerator (1), and suction pipes (18) and exhaust pipes (20) are installed at both ends of the blower (19). The exhaust pipe (20) is communicated with the waste gas incinerator (1). A heat exchange pipe (10) is installed through the right end of the waste gas incinerator (1). A water tank (6) is arranged outside the waste gas incinerator (1), and the heat exchange pipe (10) is communicated with the water tank (6). A spiral spray pipe (5) is installed through the top end of the water tank (6), and a water delivery pipe (30) is arranged inside the spiral spray pipe (5). Spray heads (29) are installed through the outer surface of the water delivery pipe (30). A water pump (8) is installed on the outer surface of the water tank (6). A drain pipe (7) is installed through the outer surface of the water tank (6), and both ends of the drain pipe (7) are fixedly connected to the bottom end of the water delivery pipe (30) and the output end of the water pump (8) respectively. The input end of the water pump (8) is fixedly connected to a water inlet pipe (9), and the bottom end of the water inlet pipe (9) is communicated with the water tank (6). An inclined filter plate (33) is installed inside the water tank (6).

2. The tail gas purification device according to claim 1, wherein: A water receiving tray (32) is installed inside the water tank (6).

3. The exhaust gas purification device according to claim 2, characterized in that: An inspection door (31) is installed through the outer surface of the water tank (6), and the inspection door (31) is made of toughened glass.

4. An exhaust gas purification device according to claim 3, characterized in that: A heat exchange shell (3) is fixedly connected to the outer surface of the heat exchange pipe (10). A water inlet flange (4) and a drain flange (2) are installed through the outer surface of the heat exchange shell (3).

5. An exhaust gas purification device according to claim 4, characterized in that: One end of the suction pipe (18) away from the blower (19) is installed with a delivery pipe (15). A filter box (14) is installed through the middle of the delivery pipe (15). A sliding table (27) is arranged inside the filter box (14). Two installation slots (26) are arranged on the outer surface of the sliding table (27), and filter meshes (28) are arranged inside the installation slots (26). Limiting slots (25) are arranged on the inner wall of the installation slots (26), and positioning bars (24) are rotatably installed inside the limiting slots (25). A threaded hole (23) is arranged inside the sliding table (27). A lead screw (22) is installed through the outer surface of the filter box (14). A stepping motor (16) is fixedly connected to the outer surface of the filter box (14), and the output end of the stepping motor (16) is fixedly connected to the lead screw (22). A sealing door (21) is installed through the outer surface of the filter box (14).

6. An exhaust gas purification device according to claim 5, characterized in that: A gas pump (11) is arranged below the delivery pipe (15). The output end of the gas pump (11) is installed with a double-headed pipe (12), and the top end of the double-headed pipe (12) is installed through the filter box (14). An ash discharge pipe (17) is installed through the outer surface of the sealing door (21), and an ash bag (13) is installed at the bottom end of the ash discharge pipe (17).

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