Flue gas treatment device for heating furnace

Abstract

The utility model relates to the field of heating furnace flue gas treatment devices, and discloses a heating furnace flue gas treatment device which comprises a filter tower, a mechanical cleaning mechanism and a cleaning solution spraying mechanism, a plurality of filter plates are sequentially arranged in the filter tower from top to bottom, and the mechanical cleaning mechanism is arranged in the filter tower and used for cleaning the filter plates; the cleaning solution spraying mechanism comprises a spraying unit and an automatic cleaning solution preparation unit, the spraying unit is used for spraying a cleaning solution prepared by the automatic cleaning solution preparation unit to the plurality of filter plates, and the spraying unit and the mechanical cleaning mechanism can work synchronously; according to the scheme, the automatic cleaning liquid preparation unit and the spraying unit are additionally arranged, cleaning liquid is prepared through the automatic cleaning liquid preparation unit, then the prepared cleaning liquid is sprayed to the filter plate through the spraying unit, and then the filter plate sprayed with the cleaning liquid is cleaned through the mechanical cleaning mechanism; the cleaning liquid can well remove some grease type particles with high adhesion on the filter plate, and the cleaning effect can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of a fume treatment device for a heating furnace, and more specifically, to a fume treatment device for a heating furnace. Background Art

[0002] During oilfield operations, in order to supply production heat, crude oil heating furnaces are usually set up in oilfield centralized processing stations, transfer stations, joint stations and other stations. Crude oil heating furnaces mostly use crude oil as fuel. The heat energy generated during the combustion process is taken away to supply various productions, and the smoke generated during the combustion process is discharged into the atmosphere through the chimney installed above the crude oil heating furnace. Therefore, a purification device is required to purify the discharged flue gas.

[0003] The utility model patent with the authorization announcement number CN220736880U discloses a flue gas dust removal device for a heating furnace, which relates to the technical field of heating furnace equipment, including a processing box, a support leg is arranged on the processing box, an air inlet pipe and an exhaust pipe are arranged on the side wall of the processing box, a spray plate and a circulation pump are also arranged on the processing box, a collecting bucket is arranged at the bottom of the processing box, and the collecting bucket is connected to the discharge plate through a reflux pipe and a circulation pump. A filter grid plate, a slide rail, a threaded rod and a cleaning plate are also arranged at the bottom of the processing box, and the cleaning plate is in contact with the filter grid plate. Under the action of the spray plate, the utility model can perform dust reduction work on the dust in the flue gas, and when used with the filter grid plate, the collection bucket and the circulation pump, the device can recycle the filtered water, thereby reducing the waste of resources. Under the action of the cleaning plate, the impurities attached to the filter grid plate are cleaned, and the use efficiency of the cleaning plate is ensured.

[0004] In the above scheme, the filter screen partition is cleaned only by the cleaning plate, but the flue gas usually contains some grease-like particles with strong adhesion, and the cleaning plate cannot clean these particles with strong adhesion, so the cleaning effect is poor. Utility Model Content

[0005] The utility model aims to overcome the defects of the above-mentioned prior art and provide a heating furnace flue gas treatment device for solving the technical problem that the flue gas usually contains some grease-like particles with strong adhesion, and the cleaning plate cannot clean these particles with strong adhesion, resulting in poor cleaning effect.

[0006] The technical solution adopted by the utility model is a flue gas treatment device for a heating furnace, comprising a filter tower, a mechanical cleaning mechanism and a cleaning liquid spraying mechanism; a plurality of filter plates are arranged in sequence from top to bottom in the filter tower, and the mechanical cleaning mechanism is arranged in the filter tower for cleaning the plurality of filter plates; the cleaning liquid spraying mechanism comprises a spraying unit and an automatic cleaning liquid preparation unit, and the spraying unit is used to spray the cleaning liquid prepared by the automatic cleaning liquid preparation unit onto the plurality of filter plates respectively, and the spraying unit and the mechanical cleaning mechanism can work synchronously.

[0007] This solution adds an automatic cleaning liquid preparation unit and a spray unit. The cleaning liquid is first prepared by the automatic cleaning liquid preparation unit, and then the prepared cleaning liquid is sprayed onto the filter plate by the spray unit. The filter plate sprayed with the cleaning liquid is then cleaned by a mechanical cleaning mechanism. The cleaning liquid can effectively remove some grease-like particles with strong adhesion on the filter plate, which can effectively improve the cleaning effect.

[0008] Furthermore, the automatic cleaning liquid preparation unit includes a mixing tank, a cleaning agent metering component and a water metering component, and the cleaning agent and water are added to the mixing tank through the cleaning agent metering component and the water metering component to form a cleaning liquid. The cleaning liquid is formed by mixing water and cleaning agent, and then the cleaning liquid is sprayed onto the filter plate through the spray unit, and then cleaned by the mechanical cleaning mechanism.

[0009] Furthermore, the detergent metering component includes a liquid level sensor 1, a storage tank, a feeding pipe, a flow meter and a solenoid valve 2. The storage tank is arranged above the mixing tank and connected to the mixing tank through a feeding pipe. The flow meter and the solenoid valve 2 are arranged on the feeding pipe. The liquid level sensor 1 is arranged at the bottom of the mixing tank. The solenoid valve 2 is opened according to the signal of the liquid level sensor 1, and the solenoid valve 2 is closed according to the signal of the flow meter. The storage tank is used to store detergent. Water is first added to the mixing tank. When the liquid level sensor 1 located at the bottom of the mixing tank detects the liquid level, the solenoid valve 2 is controlled to open according to its detection signal. The detergent inside the storage tank flows into the mixing tank along the feeding pipe. At the same time, the flow meter measures the detergent entering the mixing tank. When the flow reaches a certain amount, the solenoid valve 2 is controlled to close according to the metering signal of the flow meter to block the feeding pipe. In this way, automatic quantitative addition of detergent is realized without manual operation. The degree of automation is high and it is more convenient to use.

[0010] Furthermore, the water metering component includes a liquid level sensor 2, a water tank, a water pump 1, a water adding pipe and a solenoid valve 1. The water inlet end of the water pump 1 is connected to the water tank, and the water outlet end of the water pump 1 is connected to the mixing tank through a water adding pipe. The water adding pipe is provided with a solenoid valve 1. The liquid level sensor 2 is provided at the top of the mixing tank, and the solenoid valve 1 is closed according to the signal of the liquid level sensor 2. When the cleaning liquid needs to be prepared, the solenoid valve 1 is opened manually, and the water pump 1 inputs the water in the water tank into the mixing tank through the water adding pipe and the solenoid valve 1. When the liquid level of the added water reaches the liquid level sensor 2, the solenoid valve 1 is controlled to close automatically according to its signal. In this way, a certain amount of water can be added to the mixing tank, thereby achieving a ratio with the cleaning agent. This method realizes automatic water addition, has a high degree of automation, and is more convenient to operate.

[0011] Furthermore, a cleaning assembly is provided on the top of the filter tower, and the cleaning assembly includes a branch water pipe, a spray pipe and two atomizing nozzles. The spray pipe is provided on the inner top of the filter tower, and a plurality of two atomizing nozzles are provided on the spray pipe. The spray pipe is connected to the water supply pipe through a branch water pipe. The water pump draws water from the water tank, and delivers it into the spray pipe through the water supply pipe and the branch water pipe, and then sprays it out from the two atomizing nozzles to clean the filter plate below, so as to clean the cleaning liquid on the filter plate, so as to perform subsequent smoke filtration.

[0012] Furthermore, the spray unit includes a liquid outlet branch pipe, a liquid outlet main pipe, a water pump 2 and an atomizing nozzle 1. One end of the liquid outlet main pipe is connected to the bottom of the mixing tank. The water pump 2 is arranged on the liquid outlet main pipe. The other end of the liquid outlet main pipe branches out a plurality of liquid outlet branches. The liquid outlet branches extend into the interior of the filter tower and correspond to the filter plates one by one. The liquid outlet branches are arranged above the corresponding filter plates. The liquid outlet branches are provided with a plurality of atomizing nozzles 1 facing the filter plates. The water pump 2 provides power to spray the prepared detergent in the mixing tank onto the plurality of filter plates inside the filter tower through the liquid outlet main pipe and the liquid outlet branch pipes, so that sufficient spraying is formed and the spraying coverage is more comprehensive.

[0013] Furthermore, it also includes a water circulation mechanism, which includes a storage seat, a connecting pipe, an oil-water separator, a return pipe and a water pump 3. The bottom of the filter tower is provided with a storage seat, the storage seat is connected to the inlet of the oil-water separator through a connecting pipe, the outlet of the oil-water separator is connected to the water tank through a return pipe, and a water pump 3 is provided on the return pipe. The storage seat collects the water washed in the filter tower, and after collection, it is introduced into the oil-water separator through a connecting pipe for separation. After separation, the sewage is discharged from the sewage port on the oil-water separator, and the water without oil pollution flows into the water tank through the return pipe for reuse.

[0014] Furthermore, a guide plate is arranged in the storage seat, and the inclined surface of the guide plate faces the connecting pipe. The guide plate mainly guides the water at the bottom of the filter tower to the connecting pipe to prevent the water from settling in the storage seat.

[0015] Furthermore, the mechanical cleaning mechanism includes a motor, a connecting shaft and a fixed plate. The fixed plates are provided on both side end surfaces of each filter plate. The fixed plates are provided with bristles that contact the filter plates. The connecting shaft is rotatably provided in the filter tower. The connecting shaft passes through the fixed plate and the filter plate. The connecting shaft is fixedly connected to the fixed plate. The motor is provided at the top of the filter tower to drive the connecting shaft to rotate. The motor drives the connecting shaft to rotate, and the connecting shaft drives the fixed plate to rotate, so that the bristles on the fixed plate scrub the filter plates to achieve a better cleaning effect.

[0016] Furthermore, it also includes a smoke inlet pipe and a smoke outlet pipe, wherein the smoke inlet pipe is connected to the bottom of the filter tower, and the position of the smoke inlet pipe is lower than the position of the lowest filter plate, and the smoke outlet pipe is connected to the top of the filter tower, and the position of the smoke outlet pipe is higher than the position of the highest filter plate. The smoke inlet pipe is used to feed smoke into the filter tower, and the smoke outlet pipe is used to output the smoke filtered in the filter tower.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: this scheme newly adds an automatic cleaning liquid preparation unit and a spray unit, firstly, the cleaning liquid is prepared by the automatic cleaning liquid preparation unit, then the prepared cleaning liquid is sprayed onto the filter plate by the spray unit, and then the filter plate sprayed with the cleaning liquid is cleaned by a mechanical cleaning mechanism, and the cleaning liquid can effectively remove some grease-like particles with strong adhesion on the filter plate, and can effectively improve the cleaning effect; the automatic cleaning liquid preparation unit, the spray unit and the cleaning component are used to realize automatic preparation, spraying and flushing of the cleaning liquid, with a high degree of automation and a better user experience, and the water circulation mechanism is used to realize water recycling, which is more environmentally friendly, can effectively save water resources and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is the front view of the utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the detergent metering component of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the guide plate of the utility model.

[0022] Figure 5 It is a schematic diagram of the internal structure of the filter tower of the utility model.

[0023] In the figure: 1, filter tower, 2, mechanical cleaning mechanism, 3, cleaning liquid spraying mechanism, 4, spraying unit, 5, cleaning liquid automatic preparation unit, 6, mixing tank, 7, detergent metering component, 8, water metering component, 9, liquid level sensor 1, 10, storage tank, 11, feeding pipe, 12, flow meter, 13, solenoid valve 2, 14, smoke inlet pipe, 15, smoke outlet pipe, 16, liquid level sensor 2, 17, water tank, 18, water pump 1, 19, adding Water pipe, 20, solenoid valve one, 21, liquid outlet branch pipe, 22, liquid outlet main pipe, 23, water pump two, 24, atomizing nozzle one, 25, branch water pipe, 26, spray pipe, 27, atomizing nozzle two, 28, motor, 29, connecting shaft, 30, fixing plate, 31, water circulation mechanism, 32, storage seat, 33, connecting pipe, 34, oil-water separator, 35, return pipe, 36, water pump three, 37, guide plate, 38, cleaning component, 39, filter plate. DETAILED DESCRIPTION

[0024] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] like Figure 1 As shown, the present scheme discloses a flue gas treatment device for a heating furnace, comprising a filter tower 1, a mechanical cleaning mechanism 2 and a cleaning liquid spraying mechanism 3; a plurality of filter plates 39 are arranged in sequence from top to bottom in the filter tower 1, and the mechanical cleaning mechanism 2 is arranged in the filter tower 1 for cleaning the plurality of filter plates 39; the cleaning liquid spraying mechanism 3 comprises a spraying unit 4 and an automatic cleaning liquid preparation unit 5, and the spraying unit 4 is used for spraying the cleaning liquid prepared by the automatic cleaning liquid preparation unit 5 onto the plurality of filter plates 39 respectively, and the spraying unit 4 and the mechanical cleaning mechanism 2 can work synchronously.

[0026] It also includes a smoke inlet pipe 14 and a smoke outlet pipe 15. The smoke inlet pipe 14 is connected to the bottom of the filter tower 1, and the position of the smoke inlet pipe 14 is lower than the position of the lowest filter plate 39. The smoke outlet pipe 15 is connected to the top of the filter tower 1, and the position of the smoke outlet pipe 15 is higher than the position of the highest filter plate 39. The smoke inlet pipe 14 is used to feed smoke into the filter tower 1, and the smoke outlet pipe 15 is used to output the smoke filtered in the filter tower 1.

[0027] The automatic cleaning liquid preparation unit 5 includes a mixing tank 6, a cleaning agent metering component 7 and a water metering component 8. The cleaning agent and water are added to the mixing tank 6 through the cleaning agent metering component 7 and the water metering component 8 to form a cleaning liquid. The cleaning liquid is formed by mixing water and the cleaning agent. The cleaning liquid is then sprayed onto the filter plate 39 through the spray unit 4, and then cleaned by the mechanical cleaning mechanism 2.

[0028] like Figure 3 As shown, the detergent metering component 7 includes a liquid level sensor 9, a storage tank 10, a feeding pipe 11, a flow meter 12 and a solenoid valve 13. The storage tank 10 is arranged above the mixing tank 6 and is connected to the mixing tank 6 through the feeding pipe 11. The flow meter 12 and the solenoid valve 13 are arranged on the feeding pipe 11; the liquid level sensor 9 is arranged at the bottom of the mixing tank 6, the solenoid valve 13 is opened according to the signal of the liquid level sensor 9, and the solenoid valve 13 is closed according to the signal of the flow meter 12. The storage tank 10 is used to store detergent. Water is first added to the mixing tank 6. When the liquid level sensor 9 located at the bottom of the mixing tank 6 detects the liquid level, the solenoid valve 13 is controlled to open, and the detergent inside the storage tank 10 flows into the mixing tank 6 along the feeding pipe 11. At the same time, the flow meter 12 measures the detergent entering the mixing tank 6. When a certain amount of detergent flows down, the solenoid valve 13 is controlled to be closed according to the metering signal of the flow meter 12, so as to block the feeding pipe 11. In this way, automatic quantitative addition of detergent is realized without manual operation, with a high degree of automation and more convenient to use.

[0029] like Figure 2 and 3 As shown, the water metering component 8 includes a liquid level sensor 16, a water tank 17, a water pump 18, a water pipe 19 and a solenoid valve 20. The water inlet end of the water pump 18 is connected to the water tank 17, and the water outlet end of the water pump 18 is connected to the mixing tank 6 through the water pipe 19. The solenoid valve 20 is arranged on the water pipe 19. The liquid level sensor 16 is arranged at the top of the mixing tank 6, and the solenoid valve 20 is closed according to the signal of the liquid level sensor 16. When it is necessary to prepare the cleaning liquid, the solenoid valve 20 is manually opened, and the water pump 18 inputs the water in the water tank 17 into the mixing tank 6 through the water pipe 19 and the solenoid valve 20. When the liquid level of the added water reaches the liquid level sensor 16, the solenoid valve 20 is automatically closed according to the signal of the liquid level sensor 16. In this way, a certain amount of water can be added to the mixing tank 6, so as to achieve the ratio with the cleaning agent. This method realizes automatic water addition, has a high degree of automation, and is more convenient to operate.

[0030] like Figure 2 and 5 As shown, a cleaning assembly 38 is arranged on the top of the filter tower 1, and the cleaning assembly 38 includes a branch water pipe 25, a spray pipe 26 and a second atomizing nozzle 27. The spray pipe 26 is arranged on the inner top of the filter tower 1, and a plurality of second atomizing nozzles 27 are arranged on the spray pipe 26. The spray pipe 26 is connected to the water supply pipe 19 through the branch water pipe 25. The water pump 18 draws water from the water tank 17, and delivers it into the spray pipe 26 through the water supply pipe 19 and the branch water pipe 25, and then sprays it out from the second atomizing nozzle 27 to clean the filter plate 39 below, so as to clean the cleaning liquid on the filter plate 39, so as to perform subsequent smoke filtration.

[0031] The spray unit 4 includes a liquid outlet branch pipe 21, a liquid outlet main pipe 22, a water pump 23 and an atomizing nozzle 1 24. One end of the liquid outlet main pipe 22 is connected to the bottom of the mixing tank 6. The water pump 23 is arranged on the liquid outlet main pipe 22. The other end of the liquid outlet main pipe 22 branches out a plurality of liquid outlet branches 21. The liquid outlet branches 21 extend into the interior of the filter tower 1 and correspond to the filter plates 39 one by one. The liquid outlet branches 21 are arranged above the corresponding filter plates 39. The liquid outlet branches 21 are provided with a plurality of atomizing nozzles 1 24 facing the filter plates 39. The water pump 23 provides power to spray the prepared detergent in the mixing tank 6 onto the plurality of filter plates 39 inside the filter tower 1 through the liquid outlet main pipe 22 and the liquid outlet branch pipe 21, so that sufficient spraying is formed and the spraying coverage is more comprehensive.

[0032] like Figure 2 As shown, it also includes a water circulation mechanism 31, which includes a storage seat 32, a connecting pipe 33, an oil-water separator 34, a return pipe 35 and a water pump 36. A storage seat 32 is provided at the bottom of the filter tower 1. The storage seat 32 is connected to the inlet of the oil-water separator 34 through the connecting pipe 33, and the outlet of the oil-water separator 34 is connected to the water tank 17 through the return pipe 35. A water pump 36 is provided on the return pipe 35. The oil-water separator 34 is provided with a sewage outlet for discharging the upper layer of oil and dirt inside the oil-water separator 34. The storage seat 32 collects the cleaned water in the filter tower 1, and after collection, it is introduced into the oil-water separator 34 through the connecting pipe 33 for separation. After separation, the sewage is discharged from the sewage outlet on the oil-water separator 34, and the water without oil dirt flows into the water tank 17 through the return pipe 35 for reuse. Figure 4 As shown, a guide plate 37 is provided in the storage seat 32, and the inclined surface of the guide plate 37 faces the connecting pipe 33. The guide plate 37 mainly guides the water at the bottom of the filter tower 1 to the connecting pipe 33 to prevent the water from settling in the storage seat 32.

[0033] like Figure 5 As shown, the mechanical cleaning mechanism 2 includes a motor 28, a connecting shaft 29 and a fixed plate 30. The fixed plates 30 are arranged on both side end surfaces of each filter plate 39. The fixed plates 30 are provided with bristles that contact the filter plates 39. The connecting shaft 29 is rotatably arranged in the filter tower 1. The connecting shaft 29 passes through the fixed plate 30 and the filter plate 39. The connecting shaft 29 is fixedly connected to the fixed plate 30. The motor 28 is arranged at the top of the filter tower 1 to drive the connecting shaft 29 to rotate. The motor 28 drives the connecting shaft 29 to rotate, and the connecting shaft 29 drives the fixed plate 30 to rotate, so that the bristles on the fixed plate 30 scrub the filter plate 39 to achieve a better cleaning effect. The distance from the liquid outlet branch 21 to the filter plate 39 is greater than the distance from the fixed plate 30 to the filter plate 39. During operation, the liquid outlet branch 21 will not interfere with the fixed plate 30, and it is also more convenient to spread the cleaning liquid evenly on the filter plate 39.

[0034] Here’s how it works:

[0035] First, the smoke is processed and sent to the inside of the filter tower 1 through the smoke inlet pipe 14 . The smoke moves upward and is filtered by the filter plate 39 , and then discharged through the smoke outlet pipe 15 .

[0036] During filtration, water pump 18 draws clean water from the water storage tank 17 through the water supply pipe 19. The clean water enters the spray pipe 26 through the water supply pipe 19 and the branch water pipe 25, and is sprayed out through the atomizing nozzle 27 to settle the smoke and dust inside the filter tower 1 and rinse the filter plate 39.

[0037] When it is necessary to prepare cleaning liquid, the solenoid valve 20 is manually controlled to open, and a part of the clean water in the water tank 17 drawn by the water pump 18 enters the mixing tank 6 through the water filling pipe 19. After the liquid level sensor 9 located at the bottom of the mixing tank 6 senses the liquid level, it controls the solenoid valve 13 located at the top to open according to its liquid level signal, and the cleaning agent in the upper storage tank 10 flows through the flow meter 12 and then flows into the mixing tank 6. The flow meter 12 measures the cleaning agent flowing downstream, and after reaching a certain amount, the solenoid valve 13 is automatically closed according to its metering signal; and the water filling pipe 19 continuously injects clean water into the mixing tank 6, and the clean water and the cleaning agent are mixed to form a cleaning liquid. When the mixed liquid level reaches the upper liquid level sensor 16, the solenoid valve 20 is controlled to close according to its signal to complete the preparation of the cleaning liquid.

[0038] During cleaning, the water pump 18 can be turned off to stop the cleaning assembly 38, and the water pump 23 on one side can be operated to spray the cleaning liquid in the mixing tank 6 through the liquid outlet main pipe 22 and the liquid outlet branch pipe 21 to each filter plate 39 through the atomizing nozzle 1 24. Then the motor 28 is controlled to work, and the motor drives the lower connecting shaft 29 to rotate, so that the connecting shaft 29 drives the fixed plate 30 to rotate, and the fixed plate 30 brushes the oil on the surface of the filter plate 39 with the bristles. After the bristles are cleaned for a certain period of time, the water pump 18 is controlled to be turned on again to make the cleaning assembly 38 work, and the atomizing nozzle 2 27 continuously sprays clean water to rinse the filter plate 39, the fixed plate 30 and the bristles. After rinsing, the smoke is sent into the smoke pipe 14 for re-filtration.

[0039] The sewage after flushing and cleaning will be collected inside the storage seat 32 and enter the oil-water separator 34 through the connecting pipe 33. After separation, the oil and clean water will be stratified, and then the oil will be discharged through the sewage outlet. The water pump 36 below will work to extract the stratified water through the connecting pipe 33 and send it to the water storage tank 17 for sedimentation and storage for reuse.

[0040] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A heating furnace flue gas treatment device, characterized in that: It comprises a filtering tower (1), a mechanical cleaning mechanism (2) and a cleaning liquid spraying mechanism (3); A plurality of filter plates (39) are arranged in sequence from top to bottom in the filter tower (1); the mechanical cleaning mechanism (2) is arranged in the filter tower (1) and is used to clean the plurality of filter plates (39); the cleaning liquid spraying mechanism (3) comprises a spraying unit (4) and an automatic cleaning liquid preparation unit (5); the spraying unit (4) is used to spray the cleaning liquid prepared by the automatic cleaning liquid preparation unit (5) onto the plurality of filter plates (39); the spraying unit (4) and the mechanical cleaning mechanism (2) can work synchronously.

2. A heating furnace flue gas treatment device according to claim 1, characterized in that: The automatic cleaning liquid preparation unit (5) comprises a mixing tank (6), a cleaning agent metering component (7) and a water metering component (8), and cleaning agent and water are added to the mixing tank (6) through the cleaning agent metering component (7) and the water metering component (8) respectively to form a cleaning liquid.

3. A heating furnace flue gas treatment device according to claim 2, characterized in that: The detergent metering component (7) comprises a liquid level sensor (9), a storage tank (10), a feeding pipe (11), a flow meter (12) and a second solenoid valve (13); the storage tank (10) is arranged above the mixing tank (6) and connected to the mixing tank (6) via the feeding pipe (11); the flow meter (12) and the second solenoid valve (13) are arranged on the feeding pipe (11); the liquid level sensor (9) is arranged at the bottom of the mixing tank (6); the second solenoid valve (13) is opened according to a signal from the liquid level sensor (9); and the second solenoid valve (13) is closed according to a signal from the flow meter (12).

4. A heating furnace flue gas treatment device according to claim 2, characterized in that: The water metering component (8) comprises a second liquid level sensor (16), a water tank (17), a first water pump (18), a water adding pipe (19) and a first solenoid valve (20); the water inlet end of the first water pump (18) is connected to the water tank (17), the water outlet end of the first water pump (18) is connected to the mixing tank (6) through the water adding pipe (19), and the first solenoid valve (20) is arranged on the water adding pipe (19); the second liquid level sensor (16) is arranged at the top of the mixing tank (6), and the first solenoid valve (20) is closed according to the signal of the second liquid level sensor (16).

5. A heating furnace flue gas treatment device according to claim 4, characterized in that: A cleaning assembly (38) is arranged at the top of the filtering tower (1), and the cleaning assembly (38) comprises a branch water pipe (25), a spray pipe (26) and two atomizing nozzles (27). The spray pipe (26) is arranged at the inner top of the filtering tower (1), and a plurality of two atomizing nozzles (27) are arranged on the spray pipe (26). The spray pipe (26) is connected to a water supply pipe (19) via a branch water pipe (25).

6. A heating furnace flue gas treatment device according to claim 2, characterized in that: The spray unit (4) comprises a liquid outlet branch pipe (21), a liquid outlet main pipe (22), a second water pump (23) and an atomizing nozzle (24); one end of the liquid outlet main pipe (22) is connected to the bottom of the mixing tank (6); the second water pump (23) is arranged on the liquid outlet main pipe (22); the other end of the liquid outlet main pipe (22) branches into a plurality of liquid outlet branch pipes (21); the liquid outlet branch pipes (21) extend into the interior of the filter tower (1) and correspond one to one with the filter plates (39); the liquid outlet branch pipes (21) are arranged above the corresponding filter plates (39); and the liquid outlet branch pipes (21) are provided with a plurality of atomizing nozzles (24) facing the filter plates (39).

7. A heating furnace flue gas treatment device according to claim 2, characterized in that: The filter tower (1) further comprises a water circulation mechanism (31), the water circulation mechanism (31) comprising a storage seat (32), a connecting pipe (33), an oil-water separator (34), a return pipe (35) and a water pump (36). The bottom of the filter tower (1) is provided with a storage seat (32), the storage seat (32) is connected to the inlet of the oil-water separator (34) through the connecting pipe (33), the outlet of the oil-water separator (34) is connected to the water tank (17) through the return pipe (35), and the return pipe (35) is provided with a water pump (36).

8. A heating furnace flue gas treatment device according to claim 7, characterized in that: A guide plate (37) is arranged inside the storage seat (32), and the inclined surface of the guide plate (37) faces the connecting pipe (33).

9. The heating furnace flue gas treatment device according to claim 1, characterized in that: The mechanical cleaning mechanism (2) comprises a motor (28), a connecting shaft (29) and a fixed plate (30). The fixed plates (30) are arranged on both side end surfaces of each filter plate (39). The fixed plates (30) are provided with bristles that are in contact with the filter plates (39). The connecting shaft (29) is rotatably arranged in the filter tower (1). The connecting shaft (29) passes through the fixed plate (30) and the filter plate (39). The connecting shaft (29) is fixedly connected to the fixed plate (30). The motor (28) is arranged at the top of the filter tower (1) and is used to drive the connecting shaft (29) to rotate.

10. A heating furnace flue gas treatment device according to any one of claims 1 to 9, characterized in that: It also comprises a smoke inlet pipe (14) and a smoke outlet pipe (15), wherein the smoke inlet pipe (14) is connected to the bottom of the filter tower (1), and the position of the smoke inlet pipe (14) is lower than the position of the lowest filter plate (39), and the smoke outlet pipe (15) is connected to the top of the filter tower (1), and the position of the smoke outlet pipe (15) is higher than the position of the highest filter plate (39).

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