Dust filtering device for waste gas treatment of thermal power generation

Abstract

The application relates to the technical field of filtering devices, and discloses a dust filtering device for waste gas treatment of thermal power generation, which comprises a base, a support arranged at the top of the base, a dust removal mechanism arranged at the top of the support, a wind pipe fixedly communicated with the top of the dust removal mechanism, a dust collecting bin fixedly connected to the bottom of the dust removal mechanism, a liquid spraying device fixedly arranged at the top of the base, an agitating mechanism arranged in the liquid spraying device, a dirty material box communicated with the front face of the liquid spraying device, an exhaust pipe fixedly communicated with the top of the dirty material box, and a tank body, an air inlet, a material guide plate, an impeller, a scraper, an activated carbon filter plate and an air outlet pipe arranged in the dust removal mechanism, wherein the material guide plate is fixedly connected to the inner wall of the tank body. The application can effectively prevent excessive smoke dust particles from being accumulated to block the activated carbon filter plate, affect the air outlet amount, reduce the treatment efficiency, prolong the service life of the activated carbon filter plate, reduce the replacement frequency and reduce the maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of filtration device technology, specifically a dust filtration device for treating exhaust gas from thermal power plants. Background Technology

[0002] Dust filtration devices for exhaust gas treatment in thermal power plants are multi-stage pollution control systems, mainly used to remove various pollutants generated during combustion to meet environmental emission standards. Exhaust gas from combustion is one of the main sources of air pollution, and the pollutants emitted pose a serious threat to the environment, climate, and human health. It also leads to reduced visibility (smog) and affects traffic and ecosystems.

[0003] Patent CN216703821U discloses a dust filtration device for treating exhaust gas from thermal power plants. The device includes a tank and a fixed box. A filter plate is fixedly connected to the upper end of the front of the tank's inner cavity. An exhaust gas pipe is fixedly connected to the middle of the bottom of the tank's inner cavity. A fixing ring is fitted onto the upper end of the outer surface of the exhaust gas pipe. A second connecting rod is fixedly connected to the upper surface of the fixing ring. A fixing block is fixedly connected to the top of the second connecting rod. A motor box is fixedly connected to the middle of the upper surface of the fixing block. A first servo motor is fixedly connected to the middle of the top of the motor box's inner cavity. The output end of the first servo motor passes through the middle of the upper surface of the motor box and is fixedly connected to a screw. This invention incorporates a cleaning brush, a filter plate, a second servo motor, and a first servo motor, achieving a good filtration effect and solving the problem of poor filtration efficiency in existing dust filtration devices for treating exhaust gas from thermal power plants, which prevents the removal of dust and affects environmental safety.

[0004] However, the above-mentioned devices are difficult to clean the dust particles on the filter plates. Excessive accumulation of dust particles will clog the activated carbon filter plates, affecting the gas output, reducing the treatment efficiency, and increasing the maintenance cost of the device. Therefore, a dust filtration device for treating exhaust gas from thermal power plants is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dust filtration device for treating exhaust gas from thermal power plants, addressing the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a dust filtration device for treating exhaust gas from thermal power plants, comprising a base, a support frame on the top of the base, a dust removal mechanism on the top of the support frame, an air duct fixedly connected to the top of the dust removal mechanism, a dust collection bin fixedly connected to the bottom of the dust removal mechanism, a liquid spraying device fixedly installed on the top of the base, an agitation mechanism inside the liquid spraying device, a sludge bin connected to the front of the liquid spraying device, and an exhaust pipe fixedly connected to the top of the sludge bin. The dust removal mechanism includes: a tank, an air inlet, a guide plate, an impeller, a scraper, and an activated carbon filter. The system comprises a guide plate and an exhaust pipe. The guide plate is fixedly connected to the inner wall of the tank, the exhaust pipe is fixedly connected to the top of the tank, the air inlet is fixedly connected to the circumferential surface of the tank, the activated carbon filter plate is fixedly connected to the inner wall of the exhaust pipe, the impeller is rotatably connected to the circumferential surface of the exhaust pipe, and the scraper is fixedly connected to the circumferential surface of the impeller. The scraper contacts the bottom surface of the activated carbon filter plate, and the impeller is located inside the tank. This system effectively prevents excessive accumulation of dust particles that clog the activated carbon filter plate, affecting the air output and reducing processing efficiency. It also effectively extends the service life of the activated carbon filter plate, reduces the replacement frequency, and lowers maintenance costs.

[0007] Preferably, the spraying device includes: a chamber, a fixing frame, a motor, a liquid outlet pipe, and a liquid storage pipe. The chamber is fixedly connected to the top of the base, the fixing frame is fixedly connected to the back of the chamber, the motor is fixedly connected to the top of the fixing frame, the liquid outlet pipe is fixedly connected to the top of the chamber, and the liquid storage pipe is rotatably connected to the inner wall of the chamber. The spraying device also includes: a reciprocating screw, a sliding ring, a mounting frame, a sliding column, and a limiting rod. The reciprocating screw is fixedly connected to the output end of the motor, the sliding ring is movably connected to the circumferential surface of the reciprocating screw, the mounting frame is fixedly connected to the circumferential surface of the sliding ring, the sliding column is fixedly connected to the surface of the mounting frame, and the limiting rod is fixedly connected to the circumferential surface of the sliding ring. The sliding column contacts a groove on the surface of the liquid storage pipe, and the limiting rod is slidably connected to the inside of a groove on the inner wall of the chamber. The liquid storage pipe has a liquid outlet at its bottom, and the liquid outlet pipe is located at the top opening of the liquid storage pipe, enabling the liquid storage pipe to rotate left and right so that the agent is evenly sprayed, thereby expanding the spraying range of the agent and enhancing its purification effect.

[0008] Preferably, the agitation mechanism includes: a fixed groove, a gear, a rack, a rotating shaft, and a stirring plate. The fixed groove is fixedly connected to the inner wall of the chamber, the rack is fixedly connected to the inner wall of the fixed groove, the gear is fixedly connected to the circumferential surface of the rotating shaft, and the stirring plate is fixedly connected to the circumferential surface of the rotating shaft. The agitation mechanism also includes: a connecting plate, a stop block, and a pusher plate. The connecting plate is fixedly connected to the circumferential surface of the sliding ring, the pusher plate is hinged to the bottom of the connecting plate, the stop block is fixedly connected to the back of the connecting plate, the gear meshes with the rack, the rotating shaft is rotatably connected to the circumferential surface of the sliding ring, and the front of the stop block contacts the back of the pusher plate. This agitates the internal exhaust gas and reagents, allowing them to fully contact and improve the fusion effect, thereby enhancing the purification effect and avoiding reagent waste, thus reducing treatment costs. The pusher plate can also push the sediment into the sludge tank for collection, facilitating subsequent treatment and preventing sediment accumulation that would reduce tank space and decrease treatment efficiency.

[0009] The present invention, by adopting the above technical solution, can bring the following beneficial effects:

[0010] 1. This dust filtration device for treating exhaust gas from thermal power plants effectively prevents excessive accumulation of dust particles from clogging the activated carbon filter plate and affecting the output of gas, thus reducing treatment efficiency. It also effectively extends the service life of the activated carbon filter plate, reduces the replacement frequency, and lowers maintenance costs.

[0011] 2. This dust filtration device for treating exhaust gas from thermal power plants, through the cooperation of the following components—liquid spraying device, chamber, fixed frame, motor, liquid outlet pipe, liquid storage pipe, reciprocating screw, sliding ring, mounting frame, sliding column, and limit rod—enables the left and right rotation of the liquid storage pipe to evenly spray the agent, thereby expanding the spraying range of the liquid and enhancing its purification effect.

[0012] 3. This dust filtration device for treating exhaust gas from thermal power plants utilizes the interaction of connecting plates, baffles, fixed grooves, gears, racks, rotating shafts, stirring plates, and pusher plates to rotate the stirring plate, agitating the internal exhaust gas and reagents. This ensures thorough contact between the exhaust gas and reagents, enhancing the fusion effect and improving the purification efficiency. It also avoids reagent waste, thereby reducing treatment costs. The pusher plate can push sediment into the sludge bin for collection, facilitating subsequent treatment and preventing sediment accumulation that would reduce tank space and decrease treatment efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is a cross-sectional view of the dust collector structure of the present invention;

[0015] Figure 3This is an enlarged view of the impeller structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the liquid spraying device of the present invention;

[0017] Figure 5 This is a cross-sectional view of the spraying device of the present invention;

[0018] Figure 6 This is a schematic diagram of the reciprocating lead screw structure of the present invention;

[0019] Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A in the middle;

[0020] Figure 8 This is a schematic diagram of the liquid storage tube structure of the present invention.

[0021] In the diagram: 1. Base; 2. Support; 3. Dust removal mechanism; 301. Tank; 302. Air inlet; 303. Guide plate; 304. Impeller; 305. Scraper; 306. Activated carbon filter plate; 307. Air outlet pipe; 4. Air duct; 5. Dust collection bin; 6. Liquid spraying device; 601. Bin body; 602. Fixing frame; 603. Motor; 604. Liquid outlet pipe; 605. Liquid storage pipe; 606. Reciprocating screw; 607. Sliding ring; 608. Mounting frame; 609. Sliding column; 610. Limiting rod; 7. Agitating mechanism; 701. Connecting plate; 702. Stop block; 703. Fixing groove; 704. Gear; 705. Rack; 706. Rotating shaft; 707. Stirring plate; 708. Pushing plate; 8. Waste bin; 9. Exhaust pipe. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-8One embodiment of the present invention is: a dust filtration device for treating exhaust gas from thermal power plants, comprising a base 1, a support 2 on the top of the base 1, a dust removal mechanism 3 on the top of the support 2, a duct 4 fixedly connected to the top of the dust removal mechanism 3, a dust collection bin 5 fixedly connected to the bottom of the dust removal mechanism 3, a liquid spraying device 6 fixedly installed on the top of the base 1, an agitation mechanism 7 inside the liquid spraying device 6, a sludge bin 8 connected to the front of the liquid spraying device 6, and an exhaust pipe 9 fixedly connected to the top of the sludge bin 8. The dust removal mechanism 3 includes: a tank 301, an air inlet 302, a guide plate 303, an impeller 304, a scraper 305, an activated carbon filter plate 306, and an exhaust pipe 307. The guide plate 303 is fixedly installed on the top of the base 1. An air outlet 307 is fixedly connected to the top of the tank 301, an air inlet 302 is fixedly connected to the circumferential surface of the tank 301, an activated carbon filter plate 306 is fixedly connected to the inner wall of the air outlet 307, an impeller 304 is rotatably connected to the circumferential surface of the air outlet 307, and a scraper 305 is fixedly connected to the circumferential surface of the impeller 304. The scraper 305 contacts the bottom surface of the activated carbon filter plate 306. The impeller 304 is located inside the tank 301, which can effectively prevent excessive accumulation of smoke and dust particles from clogging the activated carbon filter plate 306 and affecting the air output, thus reducing the treatment efficiency. It also effectively extends the service life of the activated carbon filter plate 306, reduces the replacement frequency, and lowers maintenance costs.

[0024] Working principle: During operation, the exhaust gas first enters the dust removal mechanism 3 tangentially through the inlet 302. Constrained by the structure of the tank 301, it forms a strong rotating airflow. Dust particles in the exhaust gas are thrown against the cylinder wall by centrifugal force, separating from the gas. After impacting the guide plate 303 on the tank 301, the particles lose kinetic energy and slide down the inner wall under gravity to the dust collection bin 5 at the bottom of the cone. The downward-rotating exhaust gas reaches the bottom of the cone in the tank 301 and, due to pressure changes, transforms into an internal vortex, rotating upwards along the axis and passing through the top outlet pipe 30. After secondary filtration, the activated carbon filter plate 306 inside the filter plate 7 discharges the filtered air. At the same time, the rotating airflow blows the impeller 304 to rotate. The rotation of the impeller 304 drives the scraper 305 to rotate. The rotation of the scraper 305 scrapes off the dust particles accumulated on the surface of the activated carbon filter plate 306, keeping the surface of the activated carbon filter plate 306 clean. This effectively prevents excessive accumulation of dust particles from clogging the activated carbon filter plate 306, affecting the air output and reducing the treatment efficiency. It also effectively extends the service life of the activated carbon filter plate 306, reduces the replacement frequency, and lowers maintenance costs.

[0025] Please see Figures 1-8Based on the above embodiments, in another embodiment of the present invention, the spraying device 6 includes: a chamber 601, a fixing frame 602, a motor 603, a liquid outlet pipe 604, and a liquid storage pipe 605. The chamber 601 is fixedly connected to the top of the base 1, the fixing frame 602 is fixedly connected to the back of the chamber 601, the motor 603 is fixedly connected to the top of the fixing frame 602, the liquid outlet pipe 604 is fixedly connected to the top of the chamber 601, and the liquid storage pipe 605 is rotatably connected to the inner wall of the chamber 601. The spraying device 6 also includes: a reciprocating screw 606, a sliding ring 607, a mounting frame 608, a sliding column 609, and a limiting rod 610. The reciprocating screw 606 is fixedly connected to the base 1. At the output end of motor 603, sliding ring 607 is movably connected to the circumferential surface of reciprocating screw 606, mounting bracket 608 is fixedly connected to the circumferential surface of sliding ring 607, sliding column 609 is fixedly connected to the surface of mounting bracket 608, and limiting rod 610 is fixedly connected to the circumferential surface of sliding ring 607. Sliding column 609 contacts the groove on the surface of liquid storage tube 605, and limiting rod 610 is slidably connected to the inner wall groove of chamber 601. Liquid storage tube 605 has an outlet at the bottom, and outlet tube 604 is located at the top opening of liquid storage tube 605. This allows the liquid storage tube 605 to rotate left and right, so that the agent is evenly sprinkled, thereby expanding the spray range of the agent and enhancing its purification effect.

[0026] The agitation mechanism 7 includes: a fixed groove 703, a gear 704, a rack 705, a rotating shaft 706, and a stirring plate 707. The fixed groove 703 is fixedly connected to the inner wall of the silo 601, the rack 705 is fixedly connected to the inner wall of the fixed groove 703, the gear 704 is fixedly connected to the circumferential surface of the rotating shaft 706, and the stirring plate 707 is fixedly connected to the circumferential surface of the rotating shaft 706. The agitation mechanism 7 also includes: a connecting plate 701, a stop block 702, and a pusher plate 708. The connecting plate 701 is fixedly connected to the circumferential surface of the sliding ring 607, and the pusher plate 708 is hinged to the bottom of the connecting plate 701. The baffle 702 is fixedly connected to the back of the connecting plate 701. The gear 704 meshes with the rack 705. The rotating shaft 706 is rotatably connected to the circumferential surface of the sliding ring 607. The front of the baffle 702 contacts the back of the pusher plate 708, stirring the internal exhaust gas and the agent, so that the exhaust gas and the agent can fully contact and improve the fusion effect, thereby improving the purification effect and avoiding the waste of the agent and reducing the treatment cost. The pusher plate 708 can also push the sediment into the sludge tank 8 for collection, which is convenient for subsequent treatment and prevents the sediment from accumulating and reducing the space of the tank 301, thus reducing the treatment efficiency.

[0027] Working Principle: After initial removal of particulate matter, the exhaust gas is discharged into the spraying device 6 through duct 4. At this time, the agent flowing from the outlet pipe 604, which is changed according to the type of harmful substances in the exhaust gas, flows into the storage pipe 605 and flows into the chamber 601 through the bottom opening of the storage pipe 605. Simultaneously, the motor 603 starts, driving the reciprocating screw 606 to rotate. The rotation of the reciprocating screw 606 drives the sliding ring 607 to rotate. Due to the constraint of the limiting rod 610, the sliding ring 607 can only move back and forth on the reciprocating screw 606. The movement of the sliding ring 607 drives the mounting bracket 608 to move, which in turn drives the sliding column 609 to move. The sliding column 609 slides in the groove of the storage pipe 605, pushing the storage pipe 605 to rotate left and right along the shape of the groove. The left and right rotation of the storage pipe 605 ensures that the agent is evenly sprayed, thereby expanding the spray range and enhancing its purification effect.

[0028] The reciprocating movement of the sliding ring 607 also drives the rotating shaft 706 to move. The movement of the rotating shaft 706 drives the gear 704 to move. Since the gear 704 meshes with the rack 705, the movement of the gear 704 causes it to rotate. The rotation of the gear 704 drives the rotating shaft 706 to rotate, which in turn drives the stirring plate 707 to rotate. As the rotating shaft 706 moves, the stirring plate 707 also rotates, stirring the exhaust gas and the reagent inside, allowing the exhaust gas and the reagent to fully contact and improve the fusion effect, thereby improving the purification effect and avoiding waste of reagent, thus reducing the treatment cost. In addition, the stirring plate 707 is made of corrosion-resistant and wear-resistant materials, ensuring its stability and durability during long-term operation. During the reaction, the precipitate produced accumulates at the bottom of the tank 601. Simultaneously, the sliding ring 607 moves, causing the connecting plate 701 to move. The movement of the connecting plate 701 causes the pusher plate 708, which is hinged to it, to move. Due to the resistance of the precipitate, the pusher plate 708 will rotate in the opposite direction, but it is blocked by the stop block 702 and cannot rotate. The precipitate is pushed into the sludge bin 8 for collection, which facilitates subsequent treatment and prevents the accumulation of precipitate from reducing the space in the tank 301 and lowering the processing efficiency. During the round trip, without the obstruction of the stop block 702, the pusher plate 708 is affected by the resistance and rotates upward without contacting the tank 301, preventing the precipitate from being pushed into the air duct 4 and causing pipe blockage, thus reducing maintenance costs.

[0029] This invention provides a dust filtration device for treating exhaust gas from thermal power plants. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A dust filtration device for treating exhaust gas from thermal power plants, comprising a base (1), characterized in that: The base (1) is provided with a support (2) on top, the support (2) is provided with a dust removal mechanism (3) on top, the dust removal mechanism (3) is fixedly connected to a duct (4) on top, the dust removal mechanism (3) is fixedly connected to a dust collection bin (5) at the bottom, the base (1) is fixedly provided with a liquid spraying device (6), the liquid spraying device (6) is provided with a stirring mechanism (7) inside, the liquid spraying device (6) is connected to a sludge bin (8) on the front, the sludge bin (8) is fixedly connected to an exhaust pipe (9) on top, and the dust removal mechanism (3) includes: a tank (301) and an air inlet (302). The components include a guide plate (303), an impeller (304), a scraper (305), an activated carbon filter plate (306), and an exhaust pipe (307). The guide plate (303) is fixedly connected to the inner wall of the tank (301), the exhaust pipe (307) is fixedly connected to the top of the tank (301), the air inlet (302) is fixedly connected to the circumferential surface of the tank (301), the activated carbon filter plate (306) is fixedly connected to the inner wall of the exhaust pipe (307), the impeller (304) is rotatably connected to the circumferential surface of the exhaust pipe (307), and the scraper (305) is fixedly connected to the circumferential surface of the impeller (304). The liquid spraying device (6) includes: a chamber (601), a fixing frame (602), a motor (603), a liquid outlet pipe (604), and a liquid storage pipe (605). The chamber (601) is fixedly connected to the top of the base (1), the fixing frame (602) is fixedly connected to the back of the chamber (601), the motor (603) is fixedly connected to the top of the fixing frame (602), the liquid outlet pipe (604) is fixedly connected to the top of the chamber (601), and the liquid storage pipe (605) is rotatably connected to the inner wall of the chamber (601). The stirring mechanism (7) includes: a fixed groove (703), a gear (704), a rack (705), a rotating shaft (706), and a stirring plate (707). The fixed groove (703) is fixedly connected to the inner wall of the chamber (601), the rack (705) is fixedly connected to the inner wall of the fixed groove (703), the gear (704) is fixedly connected to the circumferential surface of the rotating shaft (706), and the stirring plate (707) is fixedly connected to the circumferential surface of the rotating shaft (706). The stirring mechanism (7) further includes: a connecting plate (701), a stop block (702), and a pusher plate (708). The connecting plate (701) is fixedly connected to the circumferential surface of the sliding ring (607), the pusher plate (708) is hinged to the bottom of the connecting plate (701), and the stop block (702) is fixedly connected to the back of the connecting plate (701).

2. The dust filtration device for treating exhaust gas from thermal power plants according to claim 1, characterized in that: The scraper (305) is in contact with the bottom surface of the activated carbon filter plate (306), and the impeller (304) is located inside the tank (301).

3. A dust filtration device for treating exhaust gas from thermal power plants according to claim 2, characterized in that: The spraying device (6) further includes: a reciprocating screw (606), a sliding ring (607), a mounting bracket (608), a sliding column (609), and a limiting rod (610). The reciprocating screw (606) is fixedly connected to the output end of the motor (603). The sliding ring (607) is movably connected to the circumferential surface of the reciprocating screw (606). The mounting bracket (608) is fixedly connected to the circumferential surface of the sliding ring (607). The sliding column (609) is fixedly connected to the surface of the mounting bracket (608). The limiting rod (610) is fixedly connected to the circumferential surface of the sliding ring (607).

4. A dust filtration device for treating exhaust gas from thermal power plants according to claim 3, characterized in that: The sliding column (609) contacts the groove on the surface of the liquid storage tube (605), the limiting rod (610) is slidably connected to the inner wall groove of the compartment (601), the liquid storage tube (605) has an outlet at the bottom, and the outlet tube (604) is located at the top opening of the liquid storage tube (605).

5. A dust filtration device for treating exhaust gas from thermal power plants according to claim 4, characterized in that: The gear (704) meshes with the rack (705), the rotating shaft (706) is rotatably connected to the circumferential surface of the sliding ring (607), and the front of the stop block (702) contacts the back of the pusher plate (708).

Images