Novel dust filtering device suitable for operation of thermal power plant

Abstract

The utility model provides a novel dust filtering device suitable for operation of a thermal power plant, which relates to the technical field of industrial dust filtering, and comprises a cyclone dust collector and a dust collecting box, the side surface of the cyclone dust collector is provided with a grading filtering mechanism, and the grading filtering mechanism comprises a circular cylinder shell; the right side face of the cylindrical shell is fixedly communicated with an inverted-cone-shaped shell, the right side face of the inverted-cone-shaped shell is communicated with an exhaust port of the cyclone dust collector through a connecting flange, two semicircular filter screen supports are clamped in the cylindrical shell, and the side faces, close to each other, of the two filter screen supports make contact with each other. And three semicircular clamping grooves are formed in the inner wall of each filter screen bracket. The novel dust filtering device suitable for operation of the thermal power plant has the effects of being convenient to disassemble, wash and maintain, prolonging the service life of equipment, enhancing the stability of the equipment, being capable of stably operating in the working environment of the thermal power plant for a long time, ensuring that emission reaches the standard, reducing environmental pollution and improving the overall treatment efficiency of the system.

Description

Technical Field

[0001] This utility model relates to a novel dust filtration device, specifically a novel dust filtration device suitable for operation in thermal power plants, belonging to the field of industrial dust filtration technology. Background Technology

[0002] Thermal power plants generate large amounts of dust-laden exhaust gas during the combustion of fuels such as coal, oil, and natural gas. Existing dust control devices mostly employ traditional technologies such as bag filters, electrostatic precipitators, or cyclone dust collectors. These devices suffer from a series of problems when faced with high-concentration, multi-particle-size, and multi-component dust, including low filtration efficiency, frequent clogging, difficult maintenance, and emissions that fail to meet standards. Especially in scenarios with high dust concentrations and diverse dust particle sizes, traditional equipment struggles to ensure sufficient dust capture, often resulting in dust leakage, environmental pollution, and harm to human health. Therefore, there is an urgent need for a dust filtration device with a reasonable structure, high filtration efficiency, convenient maintenance, and strong adaptability, capable of effectively addressing the challenges of high-concentration, multi-particle-size dust environments in thermal power plants and ensuring that emissions meet national environmental protection standards.

[0003] Chinese Patent Publication CN219559087U discloses a dust filtration device, including a filter box. The filter box has a connecting plate inside, and a circular filter screen is fixedly connected to the outside of the connecting plate. A fixing rod is fixedly connected to the inner wall of the filter box. A connecting shaft is rotatably connected to one side of the fixing rod. A cleaning rod is fixedly connected to one end of the connecting shaft. A brush is provided on one side of the cleaning rod. A through groove is opened inside the filter box and on one side of the connecting plate. A baffle is slidably connected inside the through groove. A collection box is slidably connected to the outside of the filter box and below the through groove.

[0004] The aforementioned patented technology cannot effectively filter particles of different diameters and is only suitable for filtering dust in normal environments. Furthermore, the circular filter screen cannot be quickly disassembled and maintained, resulting in low maintenance efficiency, which in turn affects the filtration efficiency. In contrast, the operating environment of thermal power plants is often characterized by high concentrations of dust with high dispersion, leading to poor filtration, environmental pollution, and serious impact on workers' health.

[0005] Therefore, a new type of dust filtration device suitable for operation in thermal power plants is proposed here. Utility Model Content

[0006] This invention proposes a novel dust filtration device suitable for operation in thermal power plants. It addresses the problems in existing technologies where, in complex dust environments with high concentrations and high dust dispersion, the device cannot effectively filter particles of different diameters, resulting in poor filtration performance. Furthermore, the circular filter screen cannot be quickly disassembled and maintained, leading to low maintenance efficiency, which in turn affects filtration efficiency, causes environmental pollution, and seriously impacts the health of workers.

[0007] This utility model is achieved through the following technical solution: a novel dust filtration device suitable for operation in thermal power plants, comprising a cyclone dust collector and a dust collection box, wherein a graded filtration mechanism is provided on the side of the cyclone dust collector;

[0008] The graded filtration mechanism includes a cylindrical outer shell. An inverted conical outer shell is fixedly connected to the right side of the cylindrical outer shell. The right side of the inverted conical outer shell is connected to the exhaust port of the cyclone dust collector via a connecting flange. Two semi-circular filter screen supports are snapped into the inside of the cylindrical outer shell. The two filter screen supports are in contact with each other on their adjacent sides. Each filter screen support has three semi-circular slots on its inner wall. A first filter screen, a second filter screen, and a third filter screen are respectively provided between the two filter screen supports. The first filter screen is located on the right side of the second filter screen, and the third filter screen is located on the left side of the second filter screen.

[0009] The outer surface of the graded filtration mechanism is provided with a guide slide assembly, which includes a U-shaped slide. The inner wall of the U-shaped slide is fixedly connected to the outer surface of the cylindrical shell. Each filter screen bracket has two sliders that are adapted to the U-shaped slide fixedly connected to its outer surface. Each slider is slidably connected inside the U-shaped slide, and each slider is engaged with the others by pins.

[0010] The graded filtration mechanism is internally equipped with a dust removal component, which includes a dust collection box. The outer surface of the dust collection box is fixedly connected to the inner wall of the U-shaped slide. An air pump is located above the dust collection box, and the output end of the air pump is connected to the upper surface of the dust collection box. A high-temperature resistant corrugated pipe is connected to the right side of the dust collection box. The end of the high-temperature resistant corrugated pipe away from the dust collection box passes through the cylindrical outer shell and is fixedly connected to the axis of the first filter screen, the axis of the second filter screen, and the axis of the third filter screen. A first air collecting ring and a second air collecting ring are fixedly connected to the outer surface of the high-temperature resistant corrugated pipe. The first air collecting ring is located between the first filter screen and the second filter screen, and the second air collecting ring is located between the second filter screen and the third filter screen. Eight first suction nozzles arranged in a ring shape are fixedly connected to the outer surface of the first air collecting ring, and eight second suction nozzles arranged in a ring shape are fixedly connected to the outer surface of the second air collecting ring.

[0011] A stable support component is provided below the guide slide assembly. The stable support component includes a support column. The bottom surface of the U-shaped slide is fixedly connected to the upper surface of the support column. A support pad is fixedly connected to the bottom surface of the support column. Several screw holes are opened inside the support pad.

[0012] A booster assembly is provided on the left side of the graded filtration mechanism. The booster assembly includes a volute exhaust pipe. The bottom surface of the volute exhaust pipe is fixedly connected to the left side of the cylindrical shell through a connecting flange. A high-temperature resistant motor is fixedly connected to the upper surface of the volute exhaust pipe. The output end of the high-temperature resistant motor passes through the volute exhaust pipe and is fixedly connected to a guide vane. A motor fixing block is fixedly connected to the outer surface of the high-temperature resistant motor. The bottom surface of the motor fixing block is fixedly connected to the upper surface of the volute exhaust pipe.

[0013] An arc-shaped sealing plate is fixedly connected to the right side of one of the filter screen brackets. The arc-shaped sealing plate is adapted to the opening of the cylindrical outer shell, and a handle is fixedly connected to the outer surface of the arc-shaped sealing plate.

[0014] This utility model provides a novel dust filtration device suitable for operation in thermal power plants, which has the following beneficial effects:

[0015] This novel dust filtration device, suitable for operation in thermal power plants, uses a cyclone dust collector for coarse dust treatment. Centrifugal force separates large dust particles, which tend to agglomerate as dust concentration increases. Large particles, carrying smaller particles, are captured as they move towards the collector wall. The pre-treated airflow enters the grading filtration mechanism from the cyclone dust collector's exhaust port, passing sequentially through the first, second, and third filter screens. This achieves precise grading and filtration of dust particles of different diameters, significantly improving filtration efficiency in complex dust environments. Simultaneously, the U-shaped slide rail in the guide assembly, in conjunction with the slider, allows for quick removal of the filter screen support via a handle, facilitating cleaning or replacement. Then, the air pump in the dust removal assembly creates negative pressure, directing air through the circumferentially distributed first and second suction nozzles to the corresponding filters. Dust is adsorbed on the screen and sequentially drawn into the dust collection box through the second and first air collecting rings and the high-temperature corrugated pipe. This automatically cleans the dust accumulated on the filter screen surface, preventing clogging and maintaining long-term stable filtration performance. The support columns and support pads of the stable support components form a stable support structure. After being fixed with screws, the vibration during operation can be reduced, enhancing overall stability. Finally, the high-temperature motor of the booster component drives the guide vanes to rotate, creating negative pressure in the volute exhaust stack, accelerating the discharge of filtered clean gas. This facilitates disassembly and cleaning maintenance, extends the service life of the equipment, enhances equipment stability, and has wide adaptability. It can operate stably for a long time in the complex working environment of thermal power plants, ensuring that emissions meet standards, reducing environmental pollution, and improving the overall treatment efficiency of the system. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the support column and support pad structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the cyclone dust collector and dust collection box structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the U-shaped slide of this utility model;

[0019] Figure 4 This is a schematic diagram of the filter screen support and slider structure of this utility model;

[0020] Figure 5 This is a cross-sectional view of the filter support structure of this utility model;

[0021] Figure 6 This is a cross-sectional view of the spiral-shaped exhaust pipe of this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Cyclone dust collector;

[0024] 2. Dust collection box;

[0025] 3. Staged filtration mechanism; 301. Circular cylindrical outer shell; 302. Inverted conical outer shell; 303. Filter screen support; 304. Slot; 305. First filter screen; 306. Second filter screen; 307. Third filter screen;

[0026] 4. Guide slide assembly; 401. U-shaped slide rail; 402. Slider; 403. Pin;

[0027] 5. Dust removal assembly; 501. Dust collection box; 502. Air pump; 503. High-temperature resistant corrugated pipe; 504. First air collection ring; 505. Second air collection ring; 506. First suction nozzle; 507. Second suction nozzle;

[0028] 6. Stable support components; 601. Support column; 602. Support pad; 603. Screw holes;

[0029] 7. Booster assembly; 701. Spiral exhaust stack; 702. High-temperature resistant motor; 703. Guide vane; 704. Motor mounting block;

[0030] 8. Arc-shaped sealing sheet; 9. Handle. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0032] Please see Figures 1-6This utility model provides a novel dust filtration device suitable for operation in thermal power plants, including a cyclone dust collector 1 and a dust collection box 2. A graded filtration mechanism 3 is provided on the side of the cyclone dust collector 1.

[0033] The graded filtration mechanism 3 includes a cylindrical outer shell 301. An inverted conical outer shell 302 is fixedly connected to the right side of the cylindrical outer shell 301. The right side of the inverted conical outer shell 302 is connected to the exhaust port of the cyclone dust collector 1 via a connecting flange. Two semi-circular filter screen supports 303 are snapped into the interior of the cylindrical outer shell 301. The sides of the two filter screen supports 303 that are close to each other are in contact. Each filter screen support 303 has three semi-circular slots 304 on its inner wall. A first filter screen 305, a second filter screen 306, and a third filter screen 306 are respectively provided between the two filter screen supports 303. The first filter screen 305, the second filter screen 306, and the third filter screen 307 are all snapped into the slot 304. The first filter screen 305 is located on the right side of the second filter screen 306, and the third filter screen 307 is located on the left side of the second filter screen 306. An arc-shaped sealing plate 8 is fixedly connected to the right side of one of the filter screen brackets 303. The arc-shaped sealing plate 8 is adapted to the opening of the cylindrical shell 301. A handle 9 is fixedly connected to the outer surface of the arc-shaped sealing plate 8. The tight fit between the arc-shaped sealing plate 8 and the cylindrical shell 301 ensures the overall sealing performance of the cylindrical shell 301.

[0034] Please refer to this carefully. Figure 3 and Figure 4 The outer surface of the graded filtration mechanism 3 is provided with a guide slide assembly 4, which includes a U-shaped slide 401. The inner wall of the U-shaped slide 401 is fixedly connected to the outer surface of the cylindrical shell 301. Each filter screen bracket 303 has two sliders 402 that are adapted to the U-shaped slide 401 fixedly connected to its outer surface. Each slider 402 is slidably connected inside the U-shaped slide 401. Each slider 402 is engaged with the others by a pin 403. When it is necessary to clean or replace the filter screen, the pin 403 is pulled out, and the filter screen bracket 303 is pulled out of the cylindrical shell 301 along the U-shaped slide 401 by the handle 9. After the old filter screen is removed and a new filter screen is replaced, the pin 403 is pushed back in and fixed, which facilitates the cleaning or replacement of the filter screen and improves work efficiency.

[0035] Please refer to this carefully. Figure 3 and Figure 5The graded filtration mechanism 3 has a dust removal component 5 inside, which includes a dust collection box 501. The outer surface of the dust collection box 501 is fixedly connected to the inner wall of the U-shaped slide 401. An air pump 502 is located above the dust collection box 501, and the output end of the air pump 502 is connected to the upper surface of the dust collection box 501. A high-temperature resistant corrugated pipe 503 is connected to the right side of the dust collection box 501. The end of the high-temperature resistant corrugated pipe 503 away from the dust collection box 501 passes through the cylindrical outer shell 301 and is fixedly connected to the axis of the first filter screen 305, the axis of the second filter screen 306, and the axis of the third filter screen 307. The outer surface of the high-temperature resistant corrugated pipe 503 is fixedly connected to a first air collecting ring 504 and a second air collecting ring 505. The first air collecting ring 504 is located between the first filter screen 305 and the second filter screen 306. Located between the second filter screen 306 and the third filter screen 307, the outer surface of the first air collecting ring 504 is fixedly connected to eight first suction nozzles 506 arranged in a ring shape, and the outer surface of the second air collecting ring 505 is fixedly connected to eight second suction nozzles 507 arranged in a ring shape. The air pump 502 in the dust cleaning assembly 5 creates a negative pressure, and the dust is adsorbed onto the corresponding filter screens through the circumferentially distributed first suction nozzles 506 and second suction nozzles 507. The dust is sucked into the dust collection box 501 through the second air collecting ring 505, the first air collecting ring 504 and the high-temperature resistant corrugated pipe 503 in sequence. The dust collection box 501 is equipped with a filter plate, which can effectively isolate the dust from being discharged from the air pump 502. At this time, the dust is isolated inside the dust collection box 501. The back of the dust collection box 501 is designed with an opening, which can facilitate the regular cleaning of the dust inside the dust collection box 501.

[0036] Please refer to this carefully. Figure 1 Below the guide slide assembly 4, a stable support assembly 6 is provided. The stable support assembly 6 includes a support column 601. The bottom surface of the U-shaped slide 401 is fixedly connected to the upper surface of the support column 601. A support pad 602 is fixedly connected to the bottom surface of the support column 601. Several screw holes 603 are opened inside the support pad 602. After the stable support assembly 6 is fixed to the ground by screws passing through the screw holes 603, the vibration of the device during operation can be reduced and the overall stability can be enhanced.

[0037] Please refer to this carefully. Figure 6A booster assembly 7 is provided on the left side of the graded filtration mechanism 3. The booster assembly 7 includes a volute exhaust pipe 701. The bottom surface of the volute exhaust pipe 701 is fixedly connected to the left side of the cylindrical outer shell 301 through a connecting flange. A high-temperature resistant motor 702 is fixedly connected to the upper surface of the volute exhaust pipe 701. The output end of the high-temperature resistant motor 702 passes through the volute exhaust pipe 701 and is fixedly connected to a guide vane 703. A motor fixing block 704 is fixedly connected to the outer surface of the high-temperature resistant motor 702. The bottom surface of the motor fixing block 704 is fixedly connected to the upper surface of the volute exhaust pipe 701. The high-temperature resistant motor 702 in the booster assembly 7 drives the guide vane 703 to rotate, forming a negative pressure inside the volute exhaust pipe 701, which accelerates the discharge of the filtered clean gas and can effectively improve working efficiency.

[0038] When this utility model is in use: for the initial treatment of dust, the dust-laden exhaust gas from the thermal power plant first enters the cyclone dust collector 1. Under the action of high-speed rotating airflow, large dust particles are thrown towards the wall of the collector due to centrifugal force and fall into the dust collection box 2 along the wall. The airflow after initial purification carries smaller dust particles from the exhaust port of the cyclone dust collector 1 into the graded filtration mechanism 3 located on the side.

[0039] Staged filtration: The airflow after preliminary treatment enters the cylindrical outer shell 301. First, it passes through the first-stage filter screen 305 to filter larger dust particles, then through the second-stage filter screen 306 to filter medium particles, and finally through the third-stage filter screen 307 to filter fine particles, achieving three-stage precise filtration. The purified gas enters the booster component 7 to the left.

[0040] Dust removal operation: When the filtration resistance increases, the air pump 502 of the dust removal component 5 is activated. The air pump 502 creates negative pressure, which adsorbs dust onto the corresponding filter screen through the circumferentially distributed first suction nozzle 506 and second suction nozzle 507. The dust is then sucked into the dust collection box 501 through the second air collecting ring 505, the first air collecting ring 504 and the high-temperature resistant corrugated pipe 503 in sequence. This can automatically clean the dust accumulated on the filter screen surface, prevent filter screen blockage, maintain long-term stable filtration performance, and remove dust accumulation on the filter screen.

[0041] Maintenance and Replacement: When the filter screen needs to be cleaned or replaced, pull out the pin 403, and pull the filter screen bracket 303 along the U-shaped slide 401 to slide out of the cylindrical outer shell 301. After removing the old filter screen and replacing it with a new one, push the pin 403 back in and fix it.

[0042] Finally, the gas, after being purified by tiered filtration, is rapidly discharged through the volute exhaust stack 701 under the thrust generated by the high-temperature resistant motor 702 driving the guide vane 703 to rotate, completing the entire dust filtration process. This facilitates disassembly, cleaning, and maintenance, extends the service life of the equipment, enhances its stability, and has wide adaptability. It can operate stably for a long time in the complex working environment of thermal power plants, ensuring that emissions meet standards, reducing environmental pollution, and improving the overall processing efficiency of the system.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel dust filtration device suitable for operation in thermal power plants, comprising a cyclone dust collector (1) and a dust collection box (2), characterized in that: The cyclone dust collector (1) is provided with a graded filtration mechanism (3) on its side. The graded filtration mechanism (3) includes a cylindrical outer shell (301). An inverted conical outer shell (302) is fixedly connected to the right side of the cylindrical outer shell (301). The right side of the inverted conical outer shell (302) is connected to the exhaust port of the cyclone dust collector (1) via a connecting flange. Two semi-circular filter screen supports (303) are snapped into the interior of the cylindrical outer shell (301). The two filter screen supports (303) have their sides in contact with each other. The inner wall of each filter screen support (303) is open. The system has three semi-circular slots (304). A first filter (305), a second filter (306), and a third filter (307) are respectively provided between the two filter supports (303). The first filter (305), the second filter (306), and the third filter (307) are all snapped into the slots (304). The first filter (305) is located on the right side of the second filter (306), and the third filter (307) is located on the left side of the second filter (306). The outer surface of the graded filtration mechanism (3) is provided with a guide slide assembly (4), the interior of the graded filtration mechanism (3) is provided with a dust removal assembly (5), the lower part of the guide slide assembly (4) is provided with a stable support assembly (6), and the left side of the graded filtration mechanism (3) is provided with a booster assembly (7).

2. The novel dust filtration device suitable for operation in thermal power plants according to claim 1, characterized in that: The guide slide assembly (4) includes a U-shaped slide (401). The inner wall of the U-shaped slide (401) is fixedly connected to the outer surface of the cylindrical shell (301). Each filter screen bracket (303) has two sliders (402) that are adapted to the U-shaped slide (401) fixedly connected to its outer surface. Each slider (402) is slidably connected inside the U-shaped slide (401). Each slider (402) is snapped together by a pin (403).

3. A novel dust filtration device suitable for operation in thermal power plants according to claim 2, characterized in that: The dust removal assembly (5) includes a dust collection box (501), the outer surface of which is fixedly connected to the inner wall of a U-shaped slide (401). An air pump (502) is provided above the dust collection box (501), and the output end of the air pump (502) is connected to the upper surface of the dust collection box (501). A high-temperature resistant corrugated pipe (503) is connected to the right side of the dust collection box (501). The end of the high-temperature resistant corrugated pipe (503) away from the dust collection box (501) passes through the cylindrical outer shell (301) and is connected to the axis of the first filter screen (305), the axis of the second filter screen (306), and the axis of the third filter screen (307). 7) is fixedly connected at the axis. The outer surface of the high-temperature corrugated pipe (503) is fixedly connected to the first gas collecting ring (504) and the second gas collecting ring (505). The first gas collecting ring (504) is located between the first filter screen (305) and the second filter screen (306). The second gas collecting ring (505) is located between the second filter screen (306) and the third filter screen (307). The outer surface of the first gas collecting ring (504) is fixedly connected to eight first suction nozzles (506) arranged in a ring shape. The outer surface of the second gas collecting ring (505) is fixedly connected to eight second suction nozzles (507) arranged in a ring shape.

4. A novel dust filtration device suitable for operation in thermal power plants according to claim 2, characterized in that: The stable support component (6) includes a support column (601), the bottom surface of the U-shaped slide (401) is fixedly connected to the upper surface of the support column (601), and a support pad (602) is fixedly connected to the bottom surface of the support column (601). The support pad (602) has several screw holes (603) inside.

5. A novel dust filtration device suitable for operation in thermal power plants according to claim 1, characterized in that: The booster assembly (7) includes a volute exhaust pipe (701). The bottom surface of the volute exhaust pipe (701) is fixedly connected to the left side of the cylindrical shell (301) via a connecting flange. A high-temperature resistant motor (702) is fixedly connected to the upper surface of the volute exhaust pipe (701). The output end of the high-temperature resistant motor (702) passes through the volute exhaust pipe (701) and is fixedly connected to a guide vane (703). A motor fixing block (704) is fixedly connected to the outer surface of the high-temperature resistant motor (702). The bottom surface of the motor fixing block (704) is fixedly connected to the upper surface of the volute exhaust pipe (701).

6. A novel dust filtration device suitable for operation in thermal power plants according to claim 1, characterized in that: An arc-shaped sealing plate (8) is fixedly connected to the right side of one of the filter screen supports (303). The arc-shaped sealing plate (8) is adapted to the opening of the cylindrical shell (301). A handle (9) is fixedly connected to the outer surface of the arc-shaped sealing plate (8).

Images