Machine-mounted integrated efficient dust remover of coal mining machine and filtering method thereof

Abstract

The invention belongs to the field of coal mine dust removal, and relates to a coal mining machine onboard integrated efficient dust remover and a filtering method thereof, an air inlet, a nozzle, a multi-stage filter screen, a corrugated plate demister, a centrifugal fan and other components are integrated to form an efficient dust removal system. During operation, dust-containing air enters through the air inlet, water mist is sprayed out of the nozzles to preliminarily wet dust, and then the dust with different particle sizes is effectively captured through multi-stage filtration of the coarse-efficiency filter screen, the medium-efficiency filter screen and the high-efficiency filter screen. And then the air is dehydrated by a demister, and clean air is discharged by a centrifugal fan. The equipment is provided with a dust cleaning brush and a differential pressure sensor, the filter screen can be automatically cleaned, and the filtering effect is guaranteed. The system has the advantages of efficient dust fall, water saving, environmental protection, intelligent monitoring, compact structure and convenient maintenance, can obviously reduce the dust concentration of the working face, improves the working environment, ensures the health of miners, and is a preferable scheme for dust control of the fully mechanized coal mining working face.

Description

Technical Field

[0001] The invention belongs to the field of coal mine dust removal and relates to an integrated high-efficiency dust collector on a coal mining machine and a filtering method thereof. Background Art

[0002] In the field of coal mining, dust pollution in the fully mechanized mining face, the core area of ​​coal production, has always been a key factor restricting coal mine production safety and occupational health protection. With the continuous advancement of coal mining technology and the increasing mining intensity, the amount of dust generated by the drum shearing machine, the main equipment in the fully mechanized mining face, during the coal cutting operation has also increased dramatically, posing a serious threat to the health and work safety of miners.

[0003] 1. Current status of dust pollution in fully mechanized mining working surfaces

[0004] Dust pollution in fully mechanized mining faces primarily originates from shearer drum cutting, hydraulic support column lowering and shifting, and coal transshipment. Shearer drum cutting is the primary source of dust generation. During the cutting process, the coal is crushed by the high-speed rotation of the drum, releasing a large amount of dust into the air, forming a highly concentrated dust cloud. This dust contains not only harmful coal and rock dust but also a large amount of fine respirable dust, with a particle size of less than 7.1 microns, which can penetrate deep into the lungs. Long-term inhalation can lead to serious occupational diseases such as pneumoconiosis.

[0005] 2. Limitations of Traditional Dust Removal Methods

[0006] To address dust pollution issues in fully mechanized coal mining faces, traditional coal mines primarily use external spray dust suppression technology. This technology uses nozzles positioned around the shearer drum to capture and settle airborne dust using high-pressure water mist. However, with increasingly complex coal mining conditions and increasing dust generation, the limitations of traditional external spray dust suppression technology are becoming increasingly apparent:

[0007] Limited dust reduction efficiency: External spray dust reduction relies primarily on the direct impact and wetting of dust particles by water mist, making it ineffective for capturing fine respirable dust. In high-speed airflow and complex operating environments, water mist struggles to fully cover the dust-generating area, allowing some dust to escape into the air, causing secondary pollution.

[0008] Serious water waste: External spray dust suppression consumes a large amount of water. Due to the limited coverage of the spray, some of the water mist fails to effectively act on the dust, resulting in a serious waste of water resources. This problem is particularly prominent in arid and water-scarce areas.

[0009] Impact on visibility and operational safety: The generation of large amounts of water mist can reduce visibility at the working surface, affecting miners' vision and judgment, and increasing operational risks. Especially under high-speed coal mining machines and complex geological conditions, water mist can cause safety accidents such as slips and collisions.

[0010] High equipment maintenance costs: The nozzles in the external spray system are prone to clogging and require regular cleaning and maintenance. Nozzle clogging is particularly serious in the harsh operating environment of coal mines, resulting in increased equipment downtime and increased maintenance costs.

[0011] 3. R&D requirements for integrated high-efficiency dust collectors on coal mining machines

[0012] Given the limitations of traditional external spray dust suppression technology, the development of an efficient, water-saving, and intelligent integrated high-efficiency dust collector for coal mining machines has become an urgent need for coal mine safety production and occupational health protection. This dust collector should have the following characteristics:

[0013] High-efficiency dust suppression capability: It can significantly reduce the dust concentration in the working surface air, especially the capture effect of fine respirable dust should reach the industry-leading level.

[0014] Water-saving and environmental protection: precise spraying and high-efficiency filtration technology are used to reduce water waste and realize the recycling of water resources.

[0015] Ensure sight and work safety: The dust collector design should avoid interfering with the miners' sight and ensure work safety.

[0016] Intelligent maintenance: It has automatic monitoring, automatic alarm and automatic maintenance functions to reduce equipment maintenance costs and workload.

[0017] 4. Research Background of Filtration Methods

[0018] The selection and optimization of filtration methods are crucial in the development of integrated, high-efficiency dust collectors for coal mining machines. Traditional filtration methods often rely on a single filter layer or a simple combination of filter layers, which cannot meet the requirements for efficient dust removal. Therefore, developing a multi-stage, highly efficient dust removal method became a key step in the development process. This method should be able to effectively capture and separate dust particles of varying particle sizes, ensuring that the overall performance of the dust collector meets design requirements.

[0019] In summary, the development of an integrated, high-efficiency dust collector and its filtration method for coal mining machines is essential for safe production and occupational health in coal mines. By integrating advanced dust removal technology and filtration methods, this dust collector is expected to significantly reduce dust pollution levels in fully mechanized mining faces, creating a safer and healthier working environment for miners. Summary of the Invention

[0020] In view of this, the object of the present invention is to provide an integrated high-efficiency dust collector onboard a coal mining machine and a filtering method thereof to solve the above-mentioned problems.

[0021] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated high-efficiency dust collector mounted on a coal mining machine, comprising an air intake section, a front spray section, a filtering section and a dehydration section connected in sequence, with an overall L-shaped structure, and the air inlet and the air outlet are arranged vertically, wherein: the air intake section is fixed to the rocker arm or the side of the fuselage of the coal mining machine, the air inlet faces the drum coal cutting area, and the rear end is connected to the front end of the front spray section; 3-5 groups of fan-shaped nozzles are arranged in the front spray section, which are staggered on both sides of the air flow channel at an inclination angle of 15°-45°, and the nozzles are connected to the coal mining machine pump station through a high-pressure pipeline; the filtering section contains at least three layers of stainless steel filter screens, which are 20-mesh coarse-effect screens, 80-mesh medium-effect screens and 120-mesh high-efficiency screens in order of air flow direction, with a spacing of 50-80mm between each layer, and can be detachably installed through a snap-on frame; the dehydration section adopts a corrugated plate demister with a corrugated plate spacing of 8-12mm, which is connected to the outlet of the filtering section by a flange; a power component is also provided at the end of the dehydration section.

[0022] Optional, the power component is an explosion-proof centrifugal fan, installed at the rear end of the dehydration section, driven by a variable frequency motor, and capable of handling air volume ≥180m 3 / min, and the matching explosion-proof electric control box is integrated into the electric control system of the coal mining machine.

[0023] Optionally, the filter section includes a rotatable cleaning brush, which is driven by a micro motor with a rotation speed of 10-15 r / min and a contact pressure between the bristles and the filter surface of 0.3-0.5 N / cm 2 The cleaning cycle can be set to 30-60 minutes / time.

[0024] Optionally, the front spray section is a cylindrical cavity, which is equipped with three groups of annularly distributed nozzle brackets, among which the upper nozzle group is tilted downward by 15°±2°; the middle nozzle group sprays horizontally; the lower nozzle group is tilted upward by 30°±2°; and the distance between two adjacent groups of nozzles is 80-120mm.

[0025] Optionally, the surface of the corrugated plate demister in the dehydration section is coated with a hydrophobic nano coating with a contact angle greater than 150°, and a water collecting tank is provided at the bottom, and the drain outlet of the water collecting tank is connected to the outside through a solenoid valve for drainage.

[0026] Optionally, the centrifugal fan impeller of the power component adopts forward-inclined aluminum alloy blades, the number of blades is 12-18, the impeller diameter is 380-420mm, the matching motor power is 7.5-11kW, and the speed is adjustable at 1450-2900r / min.

[0027] Optionally, a guide plate is provided between the filtration section and the dehydration section. The guide plate is a curved stainless steel plate with a bending radius of 200-300 mm and a guide angle of 15°-25°.

[0028] A filtering method for a coal mining machine-mounted integrated high-efficiency dust collector, using the above-mentioned coal mining machine-mounted integrated high-efficiency dust collector, includes the following steps:

[0029] S1, dust-laden air is sucked in through the L-shaped air inlet section at a flow rate of 2.5-3.5 m / s;

[0030] S2, the front spray section sprays water mist with a particle size of 50-100μm at a pressure of 0.8-1.2MPa, increasing the moisture content of the dust to 15%-20%;

[0031] S3, wet dust passes through the 20-mesh coarse-effect net to intercept particles > 500μm, the 80-mesh medium-effect net to capture particles 100-500μm, and the 120-mesh high-efficiency net to filter respirable dust < 100μm;

[0032] S4, the corrugated plate demister in the dehydration section removes airborne water droplets to reduce the exhaust water content to less than 5%;

[0033] S5, the dust-laden air is finally discharged through the air outlet.

[0034] Optionally, the power component monitors the filter pressure difference in real time through a pressure difference sensor. When the pressure difference is greater than 800Pa, an audible and visual alarm is triggered and a backwash program is started.

[0035] Optionally, the backwash procedure includes: closing the air inlet valve, starting the pulse solenoid valve to reversely spray compressed air at a pressure of 0.5-0.8 MPa, lasting 2-3 seconds per time, with an interval of 5-8 seconds, and circulating 3-5 times.

[0036] The beneficial effects of the present invention are:

[0037] 1) Significantly improve dust reduction efficiency: The coal mining machine's onboard integrated high-efficiency dust collector preliminarily moistens the dust through the front spray section, and combines multiple layers of stainless steel filter screens (coarse-effect screen, medium-effect screen, high-efficiency screen) for multi-stage filtration, which can significantly improve the dust capture efficiency, especially the capture effect of fine respirable dust, effectively reducing the dust concentration in the working face air.

[0038] 2) Water conservation and environmental protection: This dust collector utilizes precision spray technology, eliminating the water waste associated with traditional external spray dust suppression methods. Furthermore, the dehydration section effectively removes airborne water droplets, reducing exhaust water content and enabling water recycling, thus meeting environmental requirements.

[0039] 3) Ensuring line of sight and safety: The dust collector has an overall L-shaped structure, with the inlet and outlet arranged vertically. This effectively avoids the interference of water mist with the miners' line of sight, ensuring visibility during operation and thus improving operational safety.

[0040] 4) Intelligent maintenance reduces labor costs: The dust collector has a built-in rotatable dust cleaning brush and a differential pressure sensor, which can monitor the differential pressure of the filter screen in real time and automatically trigger the backwashing program. This reduces the frequency and workload of manual filter screen cleaning, reducing equipment maintenance costs.

[0041] 5) Improve filtration effect and equipment life: The design of multiple layers of filter screens and the detachable installation method facilitate regular replacement and cleaning of the filter screens, maintaining filtration efficiency and extending the service life of the dust collector.

[0042] 6) Enhance power performance and stability: The power components use explosion-proof centrifugal fans driven by variable frequency motors, which provide large and stable air handling capacity, ensuring efficient operation of the dust collector under different working conditions. Meanwhile, the centrifugal fan impeller uses forward-inclined aluminum alloy blades, improving the efficiency and stability of the fan.

[0043] 7) Optimize airflow distribution and dehydration effect: The design of the guide vane optimizes the airflow distribution in the dust collector, improving filtration efficiency. The surface of the dehydration section corrugated plate mist eliminator is coated with a hydrophobic nano coating, enhancing the mist removal effect and reducing the moisture content of the exhaust air, further improving air quality.

[0044] 8) Improve the comfort of the working environment: By effectively reducing the dust concentration in the working area, this dust collector significantly improves the working environment, reduces the risk of occupational diseases caused by inhaling dust, and improves the comfort and health of the miners.

[0045] 9) Strong adaptability, easy to install and integrate: The dust collector has a compact overall structure and strong adaptability, making it easy to install on the rocker arm or side of the coal mining machine and integrate with the electrical control system of the coal mining machine, achieving intelligent control and management.

[0046] 10) Promote coal mine safety production and sustainable development: The application of this dust collector helps coal mining enterprises achieve safety production goals, reduce accidents and occupational disease risks caused by dust pollution, and meet the requirements of the state for coal mine environmental protection and occupational health, promoting the sustainable development of coal mines.

[0047] Other advantages, objects, and features of the present application will be apparent to those skilled in the art in view of the following description, and will be taught in the practice of the present application. The objects and other advantages of the present application can be realized and attained by the embodiments particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0049] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0050] Figure 2 This is a detailed view of the corrugated plate demister of the present invention.

[0051] Reference numerals: air inlet 1, nozzle 2, filter 3, corrugated plate demister 4, centrifugal fan 5, air outlet 6, drain outlet 7, water collecting trough 8, guide plate 9, cleaning brush 10. DETAILED DESCRIPTION

[0052] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0053] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0054] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0055] See also Figures 1 and 2The invention relates to an integrated high-efficiency dust collector mounted on a coal mining machine and its filtering method, comprising an air inlet 1, a nozzle 2, a filter 3, a corrugated plate demister 4, a centrifugal fan 5, an air outlet 6, a drain 7, a water collection trough 8, a guide plate 9, and a dust cleaning brush 10, which are connected in sequence. The specific structure and working principle are as follows:

[0056] Air inlet 1: Located at the front end of the dust collector, it is used to draw in dust-laden air. Air inlet 1 is designed in a bell-shaped design to increase the amount of air intake.

[0057] Nozzle 2: Located behind the air inlet 1, it uses high-pressure water mist to initially moisten the inhaled dust-laden air, making it easier for dust particles to be captured by the subsequent filter 3. Nozzle 2 adopts an adjustable angle design to meet the spray requirements under different working conditions.

[0058] Filter 3: Consisting of three layers, namely, a coarse-effect filter, a medium-effect filter, and a high-efficiency filter, it sequentially filters the moistened, dust-laden air through multiple stages. Filter 3 is removable for easy regular replacement and cleaning.

[0059] Corrugated plate demister 4: Located behind filter 3, it removes airborne water droplets and reduces the moisture content of the exhaust gas. The surface of the corrugated plate demister 4 is coated with a hydrophobic nano-coating to enhance the demisting effect.

[0060] Centrifugal fan 5: Provides power for the dust collector and discharges the filtered clean air through the air outlet 6. Centrifugal fan 5 is driven by a variable frequency motor and can process large and stable air volume.

[0061] Air outlet 6: It is located at the rear end of the dust collector and is used to discharge the filtered clean air.

[0062] Drain 7 and sump 8: Drain 7 is located at the bottom of the dust collector and is used to discharge wastewater generated during the filtration process. Sump 8 collects the wastewater and discharges it from the dust collector through drain 7.

[0063] Guide plate 9: It is arranged inside the dust collector to guide the airflow to pass through the filter 3 evenly to improve the filtering efficiency.

[0064] Cleaning brush 10: Located in front of the filter 3, it rotates to clean dust adhering to the surface of the filter 3 to maintain the filtration effect. The cleaning brush 10 is driven by a motor and can be activated periodically or automatically based on the pressure difference sensor signal.

[0065] In the present invention, the cleaning brush is installed on the side wall of the filter box through the bearing seat, and the contact pressure between the brush bristles and the filter screen is 0.3-0.5N / cm 2 The micro motor drives the cleaning brush through a synchronous belt at a speed of 10-15r / min. The limit switch controls the cleaning stroke, and the brush stroke covers 95% of the effective area of ​​the filter.

[0066] Example 1

[0067] Scenario description: In a fully mechanized coal mining face at a coal mine, shearers generate large amounts of dust during coal cutting operations, severely impacting the working environment and miners' health. To improve the working environment, a decision was made to install an integrated, high-efficiency dust collector on the shearers.

[0068] Implementation steps:

[0069] Installation preparation: Check whether all parts of the dust collector are intact and prepare installation tools and materials.

[0070] Determine the installation position: According to the structure of the coal mining machine, determine the installation position of the dust collector to be on the side of the coal mining machine rocker arm, and ensure that the air inlet 1 faces the direction of the coal mining machine drum.

[0071] Installation and fixation: Use bolts to fix the dust collector to the rocker arm of the coal mining machine to ensure a firm installation.

[0072] Connecting pipelines: connect the air inlet 1 of the dust collector to the dust collecting hood around the shearer drum, connect the air outlet 6 to the exhaust pipeline, and connect the drain outlet 7 to the wastewater collection system.

[0073] Commissioning: Start the coal mining machine and the dust collector at the same time, adjust the nozzle 2 angle and spray pressure, and observe the dust removal effect. According to the pressure difference sensor signal, start the dust cleaning brush 10 regularly to clean the filter 3.

[0074] Implementation Results: After installing the dust collector, dust concentration in the working face air has been significantly reduced, significantly improving the mining environment. The dust collector operates stably and is easy to maintain, earning praise from miners.

[0075] Example 2

[0076] Scenario Description: At another fully mechanized coal mining face, due to complex geological conditions, the shearer's cutting of coal produces a high proportion of fine respirable dust, making traditional dust removal methods difficult to effectively control. To address this issue, the company decided to use an integrated, high-efficiency dust collector mounted on the shearer.

[0077] Implementation steps:

[0078] Customized design: The dust collector is customized according to the actual geological conditions and dust characteristics of the coal mine, and the filtration accuracy and number of high-efficiency nets are increased.

[0079] Installation and commissioning: Install and commission according to the installation steps of Example 1, paying special attention to adjusting the angle and spray pressure of the nozzle 2 to meet the requirements of capturing fine dust.

[0080] Intelligent monitoring: A differential pressure sensor and dust concentration monitor are installed to monitor the dust collector's operating status and filtration effect in real time. The intelligent control system enables automatic start and stop of the dust collector and automatic cleaning of the dust brush 10.

[0081] Effect evaluation: Regularly test the dust concentration in the working face air to evaluate the dust collector's treatment effect. Based on the evaluation results, make necessary adjustments and optimizations to the dust collector.

[0082] Implementation Results: After implementing the custom-designed dust collector, the concentration of fine respirable dust in the work surface air was significantly reduced, achieving the desired control effect. The application of the intelligent monitoring system improved the dust collector's operating efficiency and stability, while reducing maintenance costs.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. The shearer-mounted integrated high-efficiency dust collector is characterized by: It includes an air inlet section, a front spray section, a filtering section and a dehydration section which are connected in sequence. The overall structure is L-shaped, and the air inlet and the air outlet are arranged vertically, wherein: the air inlet section is fixed to the coal mining machine rocker arm or the side of the fuselage, the air inlet faces the drum coal cutting area, and the rear end is connected to the front end of the front spray section; 3-5 groups of fan-shaped nozzles are arranged in the front spray section, which are staggered on both sides of the air flow channel at an inclination angle of 15°-45°, and the nozzles are connected to the coal mining machine pump station through a high-pressure pipeline; the filtering section contains at least three layers of stainless steel filter screens, which are 20-mesh coarse-effect screens, 80-mesh medium-effect screens and 120-mesh high-efficiency screens in order of air flow direction, with a spacing of 50-80mm between each layer, and can be detachably installed through a snap-on frame; the dehydration section adopts a corrugated plate demister with a corrugated plate spacing of 8-12mm, which is connected to the outlet of the filtering section through a flange; a power component is also provided at the end of the dehydration section.

2. The coal mining machine-mounted integrated high-efficiency dust collector according to claim 1 is characterized in that: The power component is an explosion-proof centrifugal fan, which is installed at the rear end of the dehydration section and driven by a variable frequency motor. The air volume is ≥180m 3 / min, and the matching explosion-proof electric control box is integrated into the electric control system of the coal mining machine.

3. The coal mining machine-mounted integrated high-efficiency dust collector according to claim 1 is characterized in that: The filter section includes a rotatable cleaning brush, which is driven by a micro motor with a rotation speed of 10-15 r / min and a contact pressure of 0.3-0.5 N / cm between the bristles and the filter surface. 2 The cleaning cycle can be set to 30-60 minutes / time.

4. The coal mining machine-mounted integrated high-efficiency dust collector according to claim 1 is characterized in that: The front spray section is a cylindrical cavity with three groups of annularly distributed nozzle brackets. The upper nozzle group is tilted downward by 15°±2°; the middle nozzle group sprays horizontally; and the lower nozzle group is tilted upward by 30°±2°. The distance between two adjacent groups of nozzles is 80-120mm.

5. The coal mining machine-mounted integrated high-efficiency dust collector according to claim 1 is characterized in that: The surface of the corrugated plate demister in the dehydration section is coated with a hydrophobic nano coating with a contact angle greater than 150°. A water collecting tank is provided at the bottom, and the drain outlet of the water collecting tank is connected to the outside through a solenoid valve for drainage.

6. The coal mining machine-mounted integrated high-efficiency dust collector according to claim 1 is characterized in that: The centrifugal fan impeller of the power component adopts forward-inclined aluminum alloy blades, the number of blades is 12-18, the impeller diameter is 380-420mm, the matching motor power is 7.5-11kW, and the speed is adjustable at 1450-2900r / min.

7. The coal mining machine-mounted integrated high-efficiency dust collector according to claim 1 is characterized in that: A guide plate is provided between the filtering section and the dehydration section. The guide plate is an arc-shaped stainless steel plate with a bending radius of 200-300 mm and a guide angle of 15°-25°.

8. A filtering method for a coal mining machine-mounted integrated high-efficiency dust collector, using the coal mining machine-mounted integrated high-efficiency dust collector according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, dust-laden air is sucked in through the L-shaped air inlet section at a flow rate of 2.5-3.5m / s; S2, the front spray section sprays water mist with a particle size of 50-100μm at a pressure of 0.8-1.2MPa, increasing the moisture content of the dust to 15%-20%; S3, wet dust passes through the 20-mesh coarse-effect net to intercept particles > 500μm, the 80-mesh medium-effect net to capture particles 100-500μm, and the 120-mesh high-efficiency net to filter respirable dust < 100μm; S4, the corrugated plate demister in the dehydration section removes airborne water droplets to reduce the exhaust water content to less than 5%; S5, the dust-laden air is finally discharged through the air outlet.

9. The filtering method of the coal mining machine-mounted integrated high-efficiency dust collector according to claim 8, characterized in that: The power component monitors the filter pressure difference in real time through the pressure difference sensor. When the pressure difference is greater than 800Pa, an audible and visual alarm is triggered and the backwash program is started.

10. The filtering method of the coal mining machine-mounted integrated high-efficiency dust collector according to claim 9, characterized in that: The backwashing procedure includes: closing the air inlet valve, starting the pulse solenoid valve to reversely spray compressed air at a pressure of 0.5-0.8 MPa, lasting 2-3 seconds per time, with an interval of 5-8 seconds, and circulating 3-5 times.

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