Self-cleaning type efficient dust removal system

Abstract

The invention provides a self-cleaning type efficient dust removal system, which belongs to the technical field of filtering dust removal and comprises a filter body, a dust removal separator and a negative pressure drainage element. A filter element is longitudinally arranged in an inner cavity of the filter body, a dust removal channel is formed between the inner side wall of the filter body and the peripheral wall of the filter element, a purified gas discharge pipe is arranged at the top of the filter body, a dusty gas inlet pipe is arranged at the top of the filter body, and a dusty gas exhaust pipe is arranged at the bottom of the filter body; a separator air inlet is formed in the upper part of the side wall of the dust removal separator, a separator discharge outlet is formed in the bottom of the dust removal separator, and a dust remover air return opening is formed in the top of the dust removal separator; a main air inlet pipe is arranged at one end of the negative pressure drainage element, and a dusty gas return pipe is arranged at the bottom of the negative pressure drainage element. The pulse blowback frequency can be greatly reduced, meanwhile, the operation load of the filter element can be reduced, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtration and dust removal, and more specifically, relates to a self-cleaning high-efficiency dust removal system. Background Art

[0002] In industries such as petroleum catalytic cracking, coal chemical industry, biomass gasification, waste incineration and pyrolysis, and metallurgy, high-temperature dusty gases are often generated. In order to meet the requirements of different process procedures and environmental protection emission standards, it is necessary to purify these high-temperature dusty gases. High-temperature gas purification technology refers to the separation of solid particulate matter in the gas under conditions where the temperature is above 260°C, as well as the removal of components such as sulfur dioxide (SO2), nitrogen oxides, trace alkali metals, and trace heavy metals contained in the high-temperature gas.

[0003] The core of a high-temperature filter is a rigid filter element such as a sintered metal filter element and a ceramic filter element prepared from porous metal materials and porous ceramic materials. The sintered metal filter element has advantages such as good mechanical strength, toughness, and mechanical processing performance; the sintered ceramic filter element has advantages such as high temperature resistance, corrosion resistance, and a small coefficient of thermal expansion. At the same time, both have good resistance characteristics, filtration accuracy, and filtration efficiency, so they are widely used in the field of high-temperature gas purification. After the high-temperature dusty gas enters the filter, the solid particulate matter in the dusty gas is deposited on the outer surface of the filter element due to inertial collision, direct interception, and Brownian diffusion. As the filtration process progresses, the dust layer on the outer surface of the filter element gradually thickens, resulting in a continuous increase in the pressure drop of the filter and an increase in the operating resistance of the device. When the pressure drop of the filter increases to a certain range or the filter operates for a certain period of time, it is necessary to use the pulse backwashing method to achieve the cyclic regeneration of the filter element. During pulse backwashing, the high-speed backwashing gas enters from the open end of the filter element and gradually converts its velocity energy head into pressure energy head during the axial flow along the filter element, and radially flows out through the porous channels of the filter element. The transient energy is used to overcome the adhesion force between the dust layer and the outer surface of the filter element, thereby peeling off and removing the dust layer, causing the pressure drop of the filter element to drop suddenly and basically return to the state at the initial filtration.

[0004] Currently, the method of using the pulse backwashing method to achieve the cyclic regeneration of the filter element performance has problems such as the need for high-pressure gas for pulse backwashing, resulting in high energy consumption, and frequent pulse backwashing will reduce the service life of the filter element. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-cleaning high-efficiency dust removal system, which greatly reduces the frequency of pulse backwashing, and at the same time can reduce the operating load of the filter element and extend its service life.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide a self-cleaning high-efficiency dust removal system, including: Filter body, a filter element is longitudinally arranged in the inner cavity of the filter body, a filter chamber is formed inside the filter element, a dust removal channel is formed between the inner side wall of the filter body and the outer peripheral wall of the filter element, a purified gas discharge pipe is arranged at the top of the filter body, the purified gas discharge pipe communicates with the filter chamber, a dust-containing gas inlet pipe is arranged at the top of the filter body, the dust-containing gas inlet pipe communicates with the upper end of the dust removal channel, a dust-containing gas discharge pipe is arranged at the bottom of the filter body, and the dust-containing gas discharge pipe communicates with the lower end of the dust removal channel; Dust separator, a separator air inlet is arranged at the upper part of the side wall of the dust separator, the separator air inlet communicates with the dust-containing gas discharge pipe, a separator discharge port is arranged at the bottom of the dust separator, and a dust remover return air port is arranged at the top of the dust separator; Negative pressure drainage element, a main air inlet pipe is arranged at one end of the negative pressure drainage element, the dust-containing gas inlet pipe is connected to the end of the negative pressure drainage element far from the main air inlet pipe, a dust-containing gas return pipe is arranged at the bottom of the negative pressure drainage element, and the lower end of the dust-containing gas return pipe communicates with the dust remover return air port.

[0007] In a possible implementation manner, the filter body is an outer cylinder arranged longitudinally, the filter element is an inner filter cylinder arranged longitudinally, the upper end of the inner filter cylinder has an opening, the lower end of the inner filter cylinder is closed, the inner filter cylinder is coaxially arranged in the inner cavity of the outer cylinder, and the opening at the upper end of the inner filter cylinder is hermetically connected to the top of the inner cavity of the outer cylinder.

[0008] In a possible implementation manner, a buffer chamber is provided between the lower end of the inner filter cylinder and the bottom of the inner cavity of the outer cylinder, and the buffer chamber communicates with the dust removal channel and the dust-containing gas discharge pipe respectively.

[0009] In a possible implementation manner, the filter element is a porous filter element made of ceramic material.

[0010] In a possible implementation manner, the width of the dust removal channel is not less than 40 mm.

[0011] In a possible implementation manner, the dust separator is a cyclone separator.

[0012] In a possible implementation manner, the cyclone separator includes a cylindrical barrel and a conical barrel, the cylindrical barrel is coaxially connected to the upper end of the conical barrel, the separator air inlet is tangentially connected to the upper part of the side wall of the cylindrical barrel, the dust remover return air port is axially connected to the top of the cylindrical barrel, the inner diameter of the conical barrel decreases from top to bottom, and the separator discharge port is located at the bottom of the conical barrel.

[0013] In a possible implementation, the negative pressure drainage element is an ejector, and the main air inlet pipe and the dust-containing gas inlet pipe are coaxially connected to the left and right ends of the ejector respectively.

[0014] The beneficial effects of a self-cleaning and highly efficient dust removal system provided by the present invention are as follows: Compared with the prior art, the dust-containing gas enters from the main air inlet pipe of the negative pressure drainage element. Under the action of the negative pressure drainage element, the dust-containing gas is transported to the dust-containing gas inlet pipe and then enters the dust removal channel of the filter body. The dust-containing gas flows in the dust removal channel, and part of the dust will settle due to gravity and other effects during this process, while the gas continues to flow downward to form a shear air flow acting on the dust layer on the outer peripheral wall of the filter element, and finally is discharged from the dust-containing gas exhaust pipe of the filter body. The dust-containing gas discharged from the dust-containing gas exhaust pipe enters through the separator air inlet at the upper part of the side wall of the dust removal separator. In the dust removal separator, dust and other impurities are further separated, and the heavier impurities are discharged from the separator discharge port at the bottom, while the gas that has been preliminarily purified is discharged from the dust collector return air port at the top. The gas discharged from the dust collector return air port enters the negative pressure drainage element again through the dust-containing gas return pipe, and then enters the dust removal channel of the filter body through the dust-containing gas inlet pipe for cyclic treatment. When the dust-containing gas flows in the dust removal channel, a shear air flow is formed from top to bottom. This shear air flow acts on the dust layer on the outer peripheral wall of the filter element, reduces the thickness growth rate thereof, and reduces the deposition of fine particles. Using the self-cleaning and highly efficient dust removal system provided by the present invention, the frequency of pulse back blowing is greatly reduced, and at the same time, the operating load of the filter element can be reduced, and its service life can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic structural diagram of a self-cleaning and highly efficient dust removal system provided by the present invention; Figure 2 is a schematic structural diagram of the filter body and the filter element provided by the embodiment of the present invention; Figure 3 is Figure 2 a partial enlarged view at M in

[0017] In the figure: 1. Outer cylinder; 2. Inner filter cartridge; 3. End cover; 4. Dust removal channel; 5. Purified gas discharge pipe; 6. Dust-containing gas inlet pipe; 7. Dust-containing gas exhaust pipe; 8. Cyclone separator; 9. Separator air inlet; 10. Separator discharge port; 11. Dust collector return air port; 12. Ejector; 13. Main inlet pipe; 14. Dust-containing gas return pipe; 16. Conical guide sleeve; 17. Guide pipe; 18. Elastic connecting sleeve; 19. Annular groove; 20. Connecting nest. Detailed implementation manners

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are all used to distinguish different objects and are not used to describe a specific order.

[0020] Unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "vertical", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0021] Please refer to Figure 1, a self-cleaning and highly efficient dust removal system provided by the present invention will be described hereinafter. A self-cleaning and highly efficient dust removal system includes a filter body, a dust removal separator, and a negative pressure drainage element. A filtering element is longitudinally arranged in the inner cavity of the filter body, and a filtering chamber is formed inside the filtering element. A dust removal channel 4 is formed between the inner side wall of the filter body and the outer peripheral wall of the filtering element. A purified gas discharge pipe 5 is arranged at the top of the filter body, and the purified gas discharge pipe 5 communicates with the filtering chamber. A dust-containing gas inlet pipe 6 is arranged at the top of the filter body, and the dust-containing gas inlet pipe 6 communicates with the upper end of the dust removal channel 4. A dust-containing gas discharge pipe 7 is arranged at the bottom of the filter body, and the dust-containing gas discharge pipe 7 communicates with the lower end of the dust removal channel 4; An air inlet 9 of the separator is arranged at the upper part of the side wall of the dust removal separator, and the air inlet 9 of the separator communicates with the dust-containing gas discharge pipe 7. A discharge port 10 of the separator is arranged at the bottom of the dust removal separator, and an air return port 11 of the dust collector is arranged at the top of the dust removal separator; One end of the negative pressure drainage element is provided with a main air inlet pipe 13, the dust-containing gas inlet pipe 6 is connected to the end of the negative pressure drainage element far away from the main air inlet pipe 13, a dust-containing gas return pipe 14 is arranged at the bottom of the negative pressure drainage element, and the lower end of the dust-containing gas return pipe 14 communicates with the air return port 11 of the dust collector.

[0022] For the self-cleaning and highly efficient dust removal system provided by the present invention, compared with the prior art, the dust-containing gas enters from the main air inlet pipe 13 of the negative pressure drainage element. Under the action of the negative pressure drainage element, the dust-containing gas is transported to the dust-containing gas inlet pipe 6, and then enters the dust removal channel 4 of the filter body. The dust-containing gas flows in the dust removal channel 4, and part of the dust will settle due to gravity and other effects during this process, while the gas continues to flow downward to form a shear air flow acting on the dust layer on the outer peripheral wall of the filtering element, and finally discharges from the dust-containing gas discharge pipe 7 out of the filter body. The dust-containing gas discharged from the dust-containing gas discharge pipe 7 enters through the air inlet 9 of the separator at the upper part of the side wall of the dust removal separator. In the dust removal separator, dust and other impurities are further separated, and the heavier impurities are discharged from the discharge port 10 at the bottom, while the preliminarily purified gas is discharged from the air return port 11 at the top. The gas discharged from the air return port 11 of the dust collector enters the negative pressure drainage element again through the dust-containing gas return pipe 14, and then enters the dust removal channel 4 of the filter body through the dust-containing gas inlet pipe 6 for cyclic treatment. When the dust-containing gas flows in the dust removal channel 4, a shear air flow from top to bottom is formed, and this shear air flow acts on the dust layer on the outer peripheral wall of the filtering element, reducing the thickness growth rate and reducing the deposition of fine particles. Using the self-cleaning and highly efficient dust removal system provided by the present invention, the frequency of pulse back blowing is greatly reduced, and at the same time, the operating load of the filtering element can be reduced, and its service life is extended.

[0023] Please refer to Figure 1, the filter body is an outer cylinder 1 arranged longitudinally, the filter element is an inner filter cylinder 2 arranged longitudinally. The upper end of the inner filter cylinder 2 has an opening, and the lower end of the inner filter cylinder 2 is closed. The inner filter cylinder 2 is coaxially arranged in the inner cavity of the outer cylinder 1, and the opening at the upper end of the inner filter cylinder 2 is hermetically connected to the top of the inner cavity of the outer cylinder 1. The filter adopts a longitudinal coaxial nested structure, and the outer cylinder 1 and the inner filter cylinder 2 form a double-cylinder filtration system. The upper opening of the inner filter cylinder 2 is hermetically connected to the top of the outer cylinder 1, and the lower end is closed, forming a one-way filtration path from the outside to the inside. The fluid enters from the bottom or side of the outer cylinder 1, penetrates through the 360° annular filtration surface on the outer wall of the inner cylinder into the inner cavity, and the impurities are intercepted in the annular area between the outer cylinder and the inner cylinder. This design significantly improves the filtration efficiency and dirt-holding capacity by increasing the filtration area and optimizing the flow channel. In terms of material selection, the outer cylinder 1 can be made of 304 / 316L stainless steel, carbon steel (with an anti-corrosion coating), or engineering plastics, and the inner filter cylinder 2 is configured with a sintered metal mesh, a polymer filter element, or a ceramic filter element according to the working conditions.

[0024] In addition, there is a buffer chamber between the lower end of the inner filter cylinder 2 and the bottom of the inner cavity of the outer cylinder 1. The buffer chamber is respectively connected to the dust removal channel 4 and the dust-containing gas exhaust pipe 7. A buffer chamber is arranged between the lower end of the inner filter cylinder 2 and the bottom of the outer cylinder 1. This chamber forms a gravity settling area by the sudden drop in air flow velocity, so that the dust particles intercepted by the inner cylinder fall off the filter material surface under the action of inertia, and the fine particles are discharged through the dust-containing gas exhaust pipe 7. This design not only reduces the filter element load but also avoids secondary pollution.

[0025] Preferably, the inner diameter of the buffer chamber decreases from top to bottom. When the dust particles just enter the buffer chamber, the air flow velocity will suddenly drop due to the sudden increase in the cross-section. As the dust-containing gas flows towards the dust-containing gas exhaust pipe 7, the air flow velocity will gradually increase, and then quickly pass through the dust-containing gas exhaust pipe 7, reducing the situation of dust and dust particles staying in the buffer chamber and the dust-containing gas exhaust pipe 7.

[0026] Specifically, the filter element is a porous filter element made of ceramic material. This filtration system uses a high-strength silicon carbide or cordierite ceramic filter element as the core filter element, with its three-dimensional connected pore structure (pore diameter 1 - 5μm) having the characteristics of high temperature resistance (≤800°C), corrosion resistance, and high specific surface area. A double-cone section buffer chamber is innovatively arranged between the inner filter cylinder 2 and the bottom of the outer cylinder 1. The upper cone section contracts at a 45° angle (inner diameter decreasing ratio 1:0.7) to achieve the conversion of air flow kinetic energy, and the lower cone section further decelerates to 1 - 3m / s through a 30° angle, cooperating with the bottom annular flow guide groove to form a graded deceleration area. After the dust-containing gas is initially filtered by the ceramic filter element, the coarse particles (>10μm) fall off the filter material surface under the action of inertia and slide along the cone wall to be discharged through the dust removal channel 4; the fine particles (<10μm) are discharged through the tangential exhaust pipe, avoiding secondary pollution.

[0027] Preferably, the filter element adopts a gradient pore buffer structure. Through a three - layer pore buffer layer formed by sintering integrally, with a porosity of 45% in the outer layer → 35% in the middle layer → 25% in the inner layer, the dust stripping efficiency is increased to 99.2%, and the reverse blowing energy consumption is reduced by 40%.

[0028] Please refer to Figure 2 and Figure 3 , in the dust removal channel 4, a plurality of conical guide sleeves 16 are arranged from top to bottom. The outer diameter of the conical guide sleeve 16 decreases from top to bottom. The upper end of the conical guide sleeve 16 is circumferentially connected to the inner wall of the outer cylinder 1. The lower end of the conical guide sleeve 16 is connected with a guide pipe 17, and the guide pipe 17 extends downward, and its extension length is greater than the length of the conical guide sleeve 16. The inner wall of the conical guide sleeve 16 forms an angle of 30° - 45° with the axis of the inner filter cylinder 2. When the dust - containing gas enters the dust removal channel 4 from the dust - containing gas inlet pipe 6, the airflow passing through the conical guide sleeve 16 is in an inclined direction, which will impact the outer peripheral wall of the inner filter cylinder 2. After the impact, the dust - containing gas will flow downward through the guiding gap between the guide pipe 17 and the inner filter cylinder 2, forming the above - mentioned shear airflow.

[0029] The top of the inner filter cylinder 2 is heat - melted and connected with an elastic connecting sleeve 18. The top of the outer cylinder 1 is thread - connected with an end cap 3, and the upper end of the elastic connecting sleeve 18 is hermetically connected to the lower end face of the end cap 3. When the airflow impacts the inner filter cylinder 2, due to the existence of the elastic connecting sleeve 18, the inner filter cylinder 2 can vibrate. In addition, an annular groove 19 is arranged in the middle of the outer wall of the elastic connecting sleeve 18. The existence of this annular groove 19 can make the inner filter cylinder 2 vibrate more easily, and can cooperate with the shear airflow to more thoroughly remove the dust layer on the outer surface of the inner filter cylinder 2. Preferably, the distance between adjacent two conical guide sleeves 16 decreases from top to bottom. The dust - containing gas passing through the dust removal channel 4 will continuously impact the outer peripheral wall of the inner filter cylinder 2, and the impact frequency will gradually increase, thus forming a faster - frequency vibration of the inner filter cylinder 2, improving the effect of removing the dust layer on the outer surface of the inner filter cylinder 2.

[0030] Preferably, a connecting nest 20 is arranged at the top end of the inner filter cylinder 2, and the connecting nest 20 is installed inside the elastic connecting sleeve 18, which can increase the sealing performance and connection strength between the inner filter cylinder 2 and the elastic connecting sleeve 18.

[0031] Specifically, the width of the dust removal channel 4 is not less than 40 mm. This width setting is to ensure that dust can be effectively cleaned and guided. The width of 40 mm also takes into account the possible dust accumulation situation, avoiding dust blockage of the channel due to too narrow a channel, which affects the normal operation of the dust removal system. At the same time, a width of not less than 40 mm also helps to improve the dust removal efficiency, enabling air to flow more smoothly from top to bottom in the dust removal channel 4, forming an airflow that drives the dust to move to the designated collection area.

[0032] Specifically, the dust removal separator is a cyclone separator 8. The cyclone separator 8 includes a cylindrical barrel and a conical barrel. The cylindrical barrel is coaxially connected to the upper end of the conical barrel. The separator air inlet 9 is tangentially connected to the upper part of the side wall of the cylindrical barrel. The dust remover return air port 11 is axially connected to the top of the cylindrical barrel. The inner diameter of the conical barrel decreases from top to bottom. The separator discharge port 10 is located at the bottom of the conical barrel. The working principle of the cyclone separator 8 is based on the action of centrifugal force. When the dust-containing gas tangentially enters the cylindrical barrel from the air inlet, the gas forms a high-speed rotating airflow in the barrel. Due to the influence of centrifugal force, the dust particles are thrown towards the barrel wall and slide down along the barrel wall. The cylindrical barrel provides a relatively stable initial rotating space, enabling the airflow to smoothly form a rotating state. The decreasing inner diameter of the conical barrel can further enhance the effect of centrifugal force, allowing the dust particles to gather at the bottom more efficiently.

[0033] Preferably, spiral guide vanes are installed on the inner wall of the cylindrical barrel, which can guide the airflow to rotate more regularly, reduce the turbulence phenomenon of the airflow, and thus make the dust particles easier to be separated.

[0034] The negative pressure drainage element is an ejector 12. The main air inlet pipe 13 and the dust-containing gas inlet pipe 6 are respectively coaxially connected to the left and right ends of the ejector 12. An airflow channel structure is provided inside the ejector 12 to ensure that the gas entering from the main air inlet pipe 13 can generate a high-speed airflow, thereby forming a negative pressure at one end of the dust-containing gas inlet pipe 6. This negative pressure effect can effectively suck the dust-containing gas into the inside of the ejector 12. A dust collection container is connected below the ejector 12. When the dust-containing gas is sucked into the ejector 12, under the guidance of the airflow inside it, the dust particles are separated from the gas due to the action of centrifugal force and other forces, and the dust falls downward into the dust collection container, while the relatively clean gas is discharged from the other side of the ejector 12. Moreover, in order to improve the drainage efficiency of the ejector 12, a gas flow regulating valve is also provided at the inlet of the main air inlet pipe 13, which can adjust the main gas flow entering the ejector 12 according to the actual drainage requirements, so as to achieve the best negative pressure drainage effect.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-cleaning high-efficiency dust removal system, characterized in that: include: A filter body, wherein a filter element is longitudinally arranged in the inner cavity of the filter body, a filter chamber is formed inside the filter element, a dust removal channel (4) is formed between the inner side wall of the filter body and the outer peripheral wall of the filter element, a purified gas discharge pipe (5) is arranged at the top of the filter body, the purified gas discharge pipe (5) is connected to the filter chamber, a dust-containing gas inlet pipe (6) is arranged at the top of the filter body, the dust-containing gas inlet pipe (6) is connected to the upper end of the dust removal channel (4), and a dust-containing gas exhaust pipe (7) is arranged at the bottom of the filter body, the dust-containing gas exhaust pipe (7) is connected to the lower end of the dust removal channel (4); A dust separator, wherein an air inlet (9) is provided on the upper part of the side wall of the dust separator, the air inlet (9) of the dust separator is connected to the dust-containing gas exhaust pipe (7), a separator discharge port (10) is provided at the bottom of the dust separator, and a dust return port (11) is provided at the top of the dust separator; A negative pressure drainage element, wherein a main air inlet pipe (13) is arranged at one end of the negative pressure drainage element, the dust-containing gas air inlet pipe (6) is connected to an end of the negative pressure drainage element away from the main air inlet pipe (13), a dust-containing gas return pipe (14) is arranged at the bottom of the negative pressure drainage element, and the lower end of the dust-containing gas return pipe (14) is connected to the dust collector return port (11).

2. A self-cleaning high-efficiency dust removal system as claimed in claim 1, characterized in that: The filter body is a longitudinally arranged outer cylinder (1), and the filter element is a longitudinally arranged inner filter cartridge (2). The upper end of the inner filter cartridge (2) is provided with an opening, and the lower end of the inner filter cartridge (2) is closed. The inner filter cartridge (2) is coaxially arranged in the inner cavity of the outer cylinder (1), and the opening at the upper end of the inner filter cartridge (2) is sealed and connected to the top of the inner cavity of the outer cylinder (1).

3. A self-cleaning high-efficiency dust removal system as claimed in claim 2, characterized in that: A buffer chamber is provided between the lower end of the inner filter cylinder (2) and the bottom of the inner cavity of the outer cylinder (1), and the buffer chamber is respectively connected to the dust removal channel (4) and the dust-containing gas exhaust pipe (7).

4. A self-cleaning high-efficiency dust removal system as claimed in claim 1, characterized in that: The filter element is a porous filter element made of ceramic material.

5. A self-cleaning high-efficiency dust removal system as claimed in claim 1, characterized in that: The width of the dust removal channel (4) is not less than 40 mm.

6. A self-cleaning high-efficiency dust removal system as claimed in claim 1, characterized in that: The dust removal separator is a cyclone separator (8).

7. A self-cleaning high-efficiency dust removal system as claimed in claim 6, characterized in that: The cyclone separator (8) comprises a cylindrical body and a conical body, the cylindrical body is coaxially connected to the upper end of the conical body, the separator air inlet (9) is tangentially connected to the upper part of the side wall of the cylindrical body, the dust collector return air port (11) is axially connected to the top of the cylindrical body, the inner diameter of the conical body decreases from top to bottom, and the separator discharge port (10) is located at the bottom of the conical body.

8. A self-cleaning high-efficiency dust removal system as claimed in claim 1, characterized in that: The negative pressure drainage element is an ejector (12), and the main air intake pipe (13) and the dust-containing gas intake pipe (6) are coaxially connected to the left and right ends of the ejector (12), respectively.

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