Chlor-alkali processing coke oven flue gas filtering device

Abstract

The utility model discloses a flue gas filtering device for a chlor-alkali processing coke oven. The flue gas filtering device comprises a filtering assembly and a cleaning assembly, wherein the filtering assembly comprises a filtering box, an air inlet pipe and a dust removal bag; an air inlet pipe is arranged in the middle of the top of the filter box; the dust removal bag is arranged in the middle of the top in the filter box; the cleaning assembly comprises a water tank, a spraying pipe I and a liquid outlet pipe I; the water tank is arranged at the bottom of the filter tank; the first spraying pipe is arranged on the inner wall of the top end of the filtering box, and a first liquid inlet pipe is arranged on one side of the first spraying pipe; the first liquid outlet pipe is arranged in the middle of the bottom of the filter box, and an electromagnetic valve is arranged in the first liquid outlet pipe; according to the waste heat recovery device, before flue gas enters the waste heat recovery device, the filter assembly is arranged to filter harmful substances and dust in flue waste gas, the waste heat recovery device is protected against erosion, the recovery effect of the waste heat recovery device is improved, in addition, the cleaning assembly is arranged to be matched with the filter assembly, the interior of the filter box is convenient to clean, and the waste heat recovery effect is improved. The subsequent filtering effect of the filtering box is improved.

Description

Technical Field

[0001] This utility model relates to the field of chlor-alkali processing technology, specifically to a chlor-alkali processing coke oven flue gas filtration device. Background Technology

[0002] During the chlor-alkali processing, a certain amount of coke oven flue gas is generated. Coke oven flue gas refers to the gaseous substances that pollute the environment when fossil fuels such as coal are burned. It is usually discharged through flues or chimneys. Coke oven flue gas mainly includes nitrogen, carbon dioxide, oxygen, water vapor, and sulfides. When dealing with high-temperature coke oven flue gas, waste heat recovery devices are needed to recover and utilize it, which can greatly reduce energy waste.

[0003] Existing technologies have conducted some research on waste heat recovery devices. See patent document CN200510031618.5, which discloses a flue waste heat recovery device, including a flue shell, a water inlet pipe, a water distributor, a water tank, a heat exchanger, and a central cylinder. The water inlet pipe is connected to the water distributor, which is installed at the upper end of the flue. The central cylinder is located in the middle of the flue. A spiral flue plate is installed inside the flue shell, winding around the central cylinder. Numerous small through holes are formed on the spiral flue plate. Due to the spiral flue plate, the flue gas moves upward in a spiral shape. Cooling water flows out through the small through holes, and water droplets quickly move along the direction of the resultant force generated by gravity and the upward spiraling flue gas, mixing with and being heated by the upward-moving flue gas. The water then flows out through the small through holes of the next stage flue plate and is heated again by the flue gas.

[0004] Therefore, it can be seen that during the entire top-to-bottom movement process, the water droplets have a large contact area with the flue gas and travel a long distance, thus extending the heat exchange time between the water droplets and the flue gas and improving the heat exchange efficiency. However, the flue gas contains a large amount of harmful substances and dust. If it is directly recovered without filtering and adsorption, the harmful substances and dust will adhere to the waste heat recovery device, thereby affecting the recovery effect of the waste heat recovery device. Utility Model Content

[0005] To address the technical problem in the background art that flue gas contains a large amount of harmful substances and dust, and if the flue gas is directly recycled without filtration and adsorption, the harmful substances and dust will adhere to the waste heat recovery device, thus affecting the recovery effect of the waste heat recovery device, this utility model provides a dry powder filtration device for chemical enterprises.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A chlor-alkali processing coke oven flue gas filtration device includes a filtration assembly and a cleaning assembly. The filtration assembly includes a filter box, an inlet pipe, and a dust collection bag. The inlet pipe is located at the center of the top of the filter box. The dust collection bag is located at the center of the top of the filter box. The cleaning assembly includes a water tank, a spray pipe, and a liquid outlet pipe. The water tank is located at the bottom of the filter box. The spray pipe is located on the inner wall of the top of the filter box, and a liquid inlet pipe is located on one side of the spray pipe. The liquid outlet pipe is located at the center of the bottom of the filter box, and a solenoid valve is installed inside the liquid outlet pipe. After the flue gas enters the filter box, the dust and impurities in the flue gas are filtered by the dust collection bag. When the operation stops, the dust collection bag can be removed and replaced. Then, cleaning fluid is sprayed to clean the inside of the filter box, and a cleaning brush continuously cleans the bottom of the filter box, facilitating cleaning and improving the subsequent filtration effect.

[0008] Preferably, the chlor-alkali processing coke oven flue gas filtration device further includes a beating component, which includes a rotating shaft and beating plates; the rotating shaft is located in the filter box on one side of the dust collection bag; the beating plates are located on the rotating shaft, and brushes are evenly provided on the other side of the beating plates; and sliding grooves are provided on both sides of the filter box at the bottom of the beating plates; the effect of filtering dust and impurities is improved by beating the dust collection bag.

[0009] Preferably, activated carbon is slidably connected between the troughs; the activated carbon adsorbs the exhaust gas after dust removal, which can prevent excessive dust and impurities from adhering to the hot air pipe and affecting the performance of the hot air pipe. When the work is stopped, the activated carbon can be removed and replaced.

[0010] Preferably, a spray box is provided on the ground on one side of the water tank, and a filter cotton is provided near the top of the spray box. A second spray pipe is provided in the spray box at the bottom of the filter cotton, and a second liquid inlet pipe is provided on one side of the second spray pipe. After the filtered flue gas is used, it enters the spray box, so that the formaldehyde solution is sprayed downward to contact and react with the hydrogen sulfide in the exhaust gas. This can remove the hydrogen sulfide in the exhaust gas, reduce the pollution of the environment by hydrogen sulfide after the exhaust gas is discharged, and improve the purification effect.

[0011] Preferably, the bottom of the filter box near the spray box is provided with a hot air pipe, and the hot air pipe is provided with a valve. The other end of the hot air pipe is wrapped around the outside of the water tank and extends into the spray box below the filter cotton. When the valve is opened, the hot air pipe can heat the water in the water tank and the hot air can be recovered and reused, reducing the waste of resources.

[0012] Preferably, a cleaning brush is provided at the bottom of the filter box, and the bristles at the bottom of the cleaning brush are in contact with the bottom of the filter box; a telescopic rod is provided on the back of the filter box at the middle position corresponding to the cleaning brush, and the output end of the telescopic rod passes through the filter box and is connected to the cleaning brush, so that the telescopic rod drives the cleaning brush to move back and forth for cleaning.

[0013] Preferably, a motor is provided on one side of the filter box at the position corresponding to the rotating shaft, and the output end of the motor passes through the filter box and is connected to the rotating shaft.

[0014] Preferably, an air outlet pipe is provided at the top of one side of the spray box, and a liquid outlet pipe is provided at the bottom of the side of the spray box away from the liquid inlet pipe.

[0015] Preferably, the filter box is provided with a support frame at the bottom, and the filter box is connected to the top of the water tank through the support frame, and a sealing door is hinged to the front of the filter box.

[0016] Preferably, the water tank has an inlet pipe on one side of the top and an outlet pipe in the middle of the bottom, and support legs on all four sides of the bottom.

[0017] In the above technical solution, the present invention has the following beneficial effects:

[0018] 1. This utility model relates to a chlor-alkali processing coke oven flue gas filtration device. Flue gas is introduced into a filter box through an inlet pipe. Dust and impurities in the flue gas are then filtered through a dust collection bag inside the filter box. After operation, the dust collection bag can be removed and replaced. Cleaning fluid is then introduced through an inlet pipe into a spray pipe to spray and clean the inside of the filter box. Before the flue gas enters the waste heat recovery device, a filter assembly is installed to filter harmful substances and dust in the flue gas, protecting the waste heat recovery device from corrosion and improving its recovery efficiency. Furthermore, the cleaning assembly works in conjunction with the filter assembly to facilitate cleaning of the inside of the filter box, improving the subsequent filtration effect.

[0019] 2. The chlor-alkali processing coke oven flue gas filtration device of this utility model features a tapping component. The rotating shaft drives tapping discs to tap the dust collection bag, causing dust to fall off and improving the filtration efficiency. Preferably, the filter box at the bottom of the tapping disc has sliding grooves on both sides, with activated carbon connected within these grooves. The activated carbon adsorbs the dust-collected exhaust gas, preventing excessive dust and impurities from adhering to the hot gas pipe and affecting its performance. When operation stops, the activated carbon can be removed and replaced to further improve subsequent filtration.

[0020] 3. The chlor-alkali processing coke oven flue gas filtration device of this utility model is equipped with a telescopic rod and a cleaning brush. The telescopic rod drives the cleaning brush to move back and forth to clean the bottom of the filter box, which facilitates the cleaning of the filter box and thus improves the cleaning efficiency of the filter box. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the main sectional view of the filter box of this utility model;

[0023] Figure 3 This is a schematic diagram of the main sectional view of the spray box of this utility model;

[0024] Figure 4 This is a top sectional view of the filter box and beater plate of this utility model.

[0025] Figure 5 This is a top sectional view of the filter box and telescopic rod of this utility model;

[0026] In the diagram: 1. Water tank; 2. Filter box; 3. Motor; 4. Air inlet pipe; 5. Liquid outlet pipe 1; 6. Support frame; 7. Spray box; 8. Hot air pipe; 9. Air valve; 10. Slide chute; 11. Solenoid valve; 12. Dust bag; 13. Spray pipe 1; 14. Activated carbon; 15. Cleaning brush; 16. Liquid inlet pipe 1; 17. Spray pipe 2; 18. Filter cotton; 19. Liquid inlet pipe 2; 20. Beating plate; 21. Rotating shaft; 22. Telescopic rod; 23. Liquid outlet pipe 2. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0028] Please see Figure 1-5This utility model provides an embodiment of a chlor-alkali processing coke oven flue gas filtration device, comprising a filtration assembly, a cleaning assembly, and a beating assembly. The filtration assembly includes a filter box 2 and a dust collection bag 12; the cleaning assembly includes a water tank 1, a spray pipe 13, and a liquid outlet pipe 5; the beating assembly includes a rotating shaft 21 and beating plates 20. A water inlet pipe is provided on one side of the top of the water tank 1, and a water outlet pipe is provided in the middle of the bottom of the water tank 1. Support legs are provided around the bottom of the water tank 1. A filter box 2 is provided on one side of the top of the water tank 1. A support frame 6 is provided at the bottom of the filter box 2, and the filter box 2 is connected to the top of the water tank 1 via the support frame 6. A sealing door is hinged to the front of the filter box 2, and an air inlet pipe 4 is provided in the middle of the top of the filter box 2. A dust collection bag 12 is installed in the middle of the top of the filter box 2 via fixing bolts. A rotating shaft 21 is provided inside the filter box 2 on one side of the dust collection bag 12, and elastic beating plates are evenly distributed on the rotating shaft 21. The filter box 20 has a brush evenly distributed on the other side. Slide grooves 10 are provided on both sides of the filter box 2 at the bottom of the filter box 2, and activated carbon 14 is slidably connected within the slide grooves 10. A spray pipe 13 is provided on the inner wall at the top of the filter box 2, and an inlet pipe 16 is provided on one side of the spray pipe 13. A cleaning brush 15 is provided at the bottom of the filter box 2, and the brush at the bottom of the cleaning brush 15 is in contact with the bottom of the filter box 2. An outlet pipe 5 is provided in the middle of the bottom of the filter box 2, and a solenoid valve 11 is provided inside the outlet pipe 5. The back of the filter box 2 corresponds to the cleaning brush 15. A telescopic rod 22 is located in the middle of the filter box 2, and the output end of the telescopic rod 22 passes through the filter box 2 and is connected to the cleaning brush 15. A motor 3 is located on one side of the filter box 2 corresponding to the position of the rotating shaft 21, and the output end of the motor 3 passes through the filter box 2 and is connected to the rotating shaft 21, so that the flue gas enters the filter box 2 through the air inlet pipe 4. The air valve 9 in the hot air pipe 8 is opened, so that the dust and impurities in the flue gas are filtered through the dust collection bag 12. During filtration, the motor 3 can be started to drive the beating plate 20 on the rotating shaft 21 to rotate and beat the dust collection bag 12, which can improve its filtration effect. Then the exhaust gas after dust removal passes through the active air inlet pipe 12. Activated carbon 14 is used for adsorption filtration to facilitate the filtration of flue gas and prevent excessive dust and impurities from affecting the performance of the hot gas pipe 8. When the work is stopped, the sealed door can be opened to remove and replace the dust bag 12 and activated carbon 14. Then the sealed door is closed to allow the cleaning liquid to enter the spray pipe 13 through the inlet pipe 16 to clean the inside of the filter box 2. At the same time, the telescopic rod 22 can be activated to drive the cleaning brush 15 to move and clean the bottom of the filter box 2. Then the solenoid valve 11 can be opened to discharge the wastewater through the outlet pipe 5, which facilitates the cleaning of the filter box 2 and makes the subsequent filtration effect better.

[0029] A spray box 7 is installed on the ground on one side of the water tank 1. A filter cotton 18 is installed near the top of the spray box 7. A spray pipe 2 17 is installed at the bottom of the spray box 7. A liquid inlet pipe 2 19 is installed on one side of the spray pipe 2 17. An exhaust pipe is installed at the top of one side of the spray box 7. An exhaust pipe 23 is installed at the bottom of the side of the spray box 7 away from the liquid inlet pipe 2 19. The filtered waste gas enters the spray box 7. Formaldehyde solution can then be sent into the spray pipe 2 17 through the liquid inlet pipe 2 19. The spray pipe 2 17 sprays liquid to contact and react with hydrogen sulfide in the waste gas. The waste liquid is then discharged into the treatment tank through the exhaust pipe 2 23. The reacted gas is filtered again through the filter cotton 18 and then discharged through the exhaust pipe. This can reduce the pollution of hydrogen sulfide to the environment and improve the purification effect.

[0030] A hot air pipe 8 is provided at the bottom of the filter box 2 near the spray box 7, and a valve 9 is provided inside the hot air pipe 8. The other end of the hot air pipe 8 is wrapped around the outside of the water tank 1 and extends into the spray box 7 below the filter cotton 18. When the valve 9 is opened, the filtered waste gas can be introduced into the spray box 7 through the hot air pipe 8. The hot air pipe 8 can be wrapped around the water tank 1 to heat the water in the water tank 1. It can be recycled and reused, reducing the waste of resources.

[0031] In this embodiment, flue gas is introduced into the filter box 2 through the air inlet pipe 4. The air valve 9 in the hot air pipe 8 can be opened, allowing dust and impurities in the flue gas to be filtered through the dust collection bag 12. During filtration, the motor 3 can be started to drive the beater 20 on the rotating shaft 21 to rotate and beat the dust collection bag 12, which can improve the filtration effect. Then, the dust-removed exhaust gas is filtered by activated carbon 14, which facilitates the filtration of flue gas and prevents excessive dust and impurities from affecting the performance of the hot air pipe 8. After the flue gas is filtered, it can be introduced into the spray box 7 through the hot air pipe 8. The hot air pipe 8 can be wrapped around the water tank 1 to heat the water in the water tank 1, which can be recycled and reduced resource waste. Then, it enters the spray box 7, where formaldehyde solution can be sent into the spray box through the liquid inlet pipe 19. Inside pipe 2 17, liquid can be sprayed from spray pipe 2 17 to contact and react with hydrogen sulfide in the exhaust gas. Then, the waste liquid is discharged into the treatment tank through outlet pipe 2 23. The reacted gas is filtered again through filter cotton 18 and discharged through the exhaust pipe, which can reduce the pollution of hydrogen sulfide to the environment and improve the purification effect. When the work is stopped, the sealing door can be opened to remove and replace the dust bag 12 and activated carbon 14. Then, the sealing door is closed, and the cleaning liquid enters the spray pipe 13 through inlet pipe 16 to clean the filter box 2. At the same time, the telescopic rod 22 can be activated to drive the cleaning brush 15 to move and clean the bottom of the filter box 2. Then, the solenoid valve 11 can be opened to discharge the sewage through outlet pipe 5, which facilitates the cleaning of the filter box 2 and makes the subsequent filtration effect better.

[0032] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filtration device for coke oven flue gas in chlor-alkali processing, characterized in that: Includes a filter assembly and a cleaning assembly; among which, The filtration assembly includes a filter box (2) and a dust bag (12); An air inlet pipe (4) is provided at the middle position of the top of the filter box (2); the dust removal bag (12) is located at the middle position of the top inside the filter box (2); The cleaning assembly includes a water tank (1), a spray pipe (13), and a liquid outlet pipe (5); The water tank (1) is located at the bottom of the filter box (2); the spray pipe (13) is located on the inner wall of the top of the filter box (2), and the spray pipe (13) has an inlet pipe (16) on one side; the outlet pipe (5) is located in the middle of the bottom of the filter box (2), and the outlet pipe (5) has a solenoid valve (11).

2. The chlor-alkali processing coke oven flue gas filtration device according to claim 1, characterized in that: The chlor-alkali processing coke oven flue gas filtration device also includes a beating component, which includes a rotating shaft (21) and beating plates (20); The rotating shaft (21) is located inside the filter box (2) on one side of the dust collection bag (12); The beating plate (20) is mounted on the rotating shaft (21), and brushes are evenly provided on the other side of the beating plate (20). Sliding grooves (10) are provided on both sides of the filter box (2) at the bottom of the beating plate (20).

3. The chlor-alkali processing coke oven flue gas filtration device according to claim 2, characterized in that: Activated carbon (14) is slidably connected between the grooves (10).

4. The chlor-alkali processing coke oven flue gas filtration device according to claim 1, characterized in that: A spray box (7) is provided on the ground on one side of the water tank (1), and a filter cotton (18) is provided near the top of the spray box (7). A second spray pipe (17) is provided in the spray box (7) at the bottom of the filter cotton (18), and a second liquid inlet pipe (19) is provided on one side of the second spray pipe (17).

5. The chlor-alkali processing coke oven flue gas filtration device according to claim 4, characterized in that: The filter box (2) has a hot air pipe (8) at the bottom end near the spray box (7), and the hot air pipe (8) has a gas valve (9) inside. The other end of the hot air pipe (8) is wrapped around the outside of the water tank (1) and extends into the spray box (7) below the filter cotton (18).

6. The chlor-alkali processing coke oven flue gas filtration device according to claim 1, characterized in that: The bottom of the filter box (2) is provided with a cleaning brush (15), and the brush at the bottom of the cleaning brush (15) is in contact with the bottom of the filter box (2). The filter box (2) has a telescopic rod (22) on the back corresponding to the middle position of the cleaning brush (15), and the output end of the telescopic rod (22) passes through the filter box (2) and is connected to the cleaning brush (15).

7. The chlor-alkali processing coke oven flue gas filtration device according to claim 2, characterized in that: A motor (3) is provided on one side of the filter box (2) at the position corresponding to the rotating shaft (21), and the output end of the motor (3) passes through the filter box (2) and is connected to the rotating shaft (21).

8. The chlor-alkali processing coke oven flue gas filtration device according to claim 4, characterized in that: The top of one side of the spray box (7) is provided with an air outlet pipe, and the bottom of the spray box (7) away from the liquid inlet pipe (19) is provided with a liquid outlet pipe (23).

9. The chlor-alkali processing coke oven flue gas filtration device according to claim 1, characterized in that: The filter box (2) is provided with a support frame (6) at the bottom, and the filter box (2) is connected to the top of the water tank (1) through the support frame (6), and the filter box (2) is hinged with a sealing door on the front.

10. The chlor-alkali processing coke oven flue gas filtration device according to claim 1, characterized in that: The water tank (1) has an inlet pipe on one side of the top and an outlet pipe in the middle of the bottom. The water tank (1) also has support legs on all four sides of the bottom.

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