Anti-blocking cleaning device for vacuum dust removal pipe end and dust removal system

Abstract

The application discloses a blocking prevention cleaning device for a vacuum dust removal pipe end, which is applied to the dust suction port pipe inlet end of a vacuum dust removal system and comprises a pneumatic butterfly valve, a silencer and a filter.

Description

Technical Field

[0001] This application relates to the field of industrial dust treatment technology, and in particular to an anti-clogging cleaning device and dust removal system for the ends of vacuum dust collector tubes. Background Technology

[0002] Vacuum dust removal systems are widely used as key, efficient, and environmentally friendly equipment in modern chemical, building materials, metallurgical, and food processing industries. These systems generate negative pressure in a closed pipe network using power sources such as fans, drawing loose materials like dust, particles, or debris from the work site to equipment such as cyclone separators and bag filters for centralized processing. This achieves purification of the working environment or targeted material transport.

[0003] However, based on on-site factory experience, such systems commonly face the following technical challenges during long-term operation: clogging at the pipe inlet, i.e., the dust suction port. Due to the moisture and viscosity of the material, electrostatic adsorption, irregular particle shape, or excessive instantaneous suction volume, the material easily adheres, accumulates, and even forms bridging at the pipe inlet, ultimately leading to complete pipe blockage. Pipe blockage not only reduces the system's suction efficiency and affects production continuity but may also damage the pipe due to excessive local negative pressure.

[0004] To address this issue, existing technologies mainly employ the following methods, but all have significant drawbacks:

[0005] The existing manual shutdown cleaning method requires shutting down the entire vacuum dust removal system when a blockage is discovered. Operators then open the pre-designated inspection port and manually unclog the system using tools such as sticks and high-pressure air guns. This method severely impacts production efficiency and causes unnecessary downtime. Secondly, it is labor-intensive, and dust inevitably escapes again during the cleaning process, polluting the environment and seriously endangering the health of operators. Furthermore, relying on manual inspections results in slow response times and preventative maintenance.

[0006] Secondly, some systems install vibratory motors on the outside of pipe sections prone to blockage. The principle is to use high-frequency vibration to loosen and remove materials adhering to the pipe wall. However, for materials with high moisture content or strong viscosity, simple mechanical vibration is not effective in clearing blockages; at the same time, prolonged strong vibration can easily cause fatigue damage to pipe welds, flange connections, etc., reducing the structural reliability and service life of the pipeline network, and the vibratory motor itself also generates considerable operating noise.

[0007] Therefore, how to develop an efficient and reliable online automated unblocking system to solve the problem of pipe end blockage in vacuum dust removal systems is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0008] This application provides an anti-clogging cleaning device for the end of a vacuum dust removal pipe and a vacuum dust removal system equipped with the anti-clogging cleaning device for the end of a vacuum dust removal pipe, thereby achieving efficient and reliable online automated unclogging to solve the problem of pipe end blockage in vacuum dust removal systems, which is a technical problem that urgently needs to be solved in this field.

[0009] To achieve the above objectives, this application proposes an anti-clogging cleaning device for the end of a vacuum dust removal pipe, applied to the inlet end of the suction pipe of a vacuum dust removal system, comprising:

[0010] A pneumatic butterfly valve, wherein the air inlet of the pneumatic butterfly valve is adapted to be connected to a high-pressure air source, and is used to instantaneously open or close the air circuit according to a control signal;

[0011] A silencer, wherein the air inlet of the silencer is airtightly connected to the air outlet of the pneumatic butterfly valve; and

[0012] The filter has a base end that is airtightly connected to the outlet end of the silencer. The filter has multiple air jet holes for spraying gas outwards. The filter is adapted to be positioned in the inlet area of ​​the dust suction pipe during operation.

[0013] Preferably, the pneumatic butterfly valve is an electromagnetic pneumatic valve, and the pneumatic butterfly valve is equipped with an electromagnetic actuator that receives electrical signals to control the valve's operation.

[0014] Preferably, the main body of the filter is a cage-like or cylindrical structure with a closed front end, and the multiple air jet holes are densely and evenly distributed on the side wall of the filter.

[0015] Preferably, the plurality of jet holes are arranged in a spiral or annular array on the sidewall of the cage-like or cylindrical structure to form a three-dimensional airflow with a rotational component during jetting.

[0016] Preferably, the muffler is an impedance composite muffler.

[0017] A dust removal system for an anti-clogging cleaning device at the end of a vacuum dust collector tube includes:

[0018] A power source for generating negative pressure in a pipe network; a gas-solid separation and collection device; and a pipe network connecting the power source, the gas-solid separation and collection device, and at least one dust suction port;

[0019] The vacuum dust removal system further includes an anti-blocking cleaning device for the vacuum dust removal pipe end as described in any one of claims 1 to 5, which is disposed at the inlet end of the at least one dust suction port pipe.

[0020] Preferably, the vacuum dust removal system further includes a central control unit, the signal output terminal of which is electrically connected to the pneumatic butterfly valve in the anti-blocking cleaning device for the vacuum dust removal pipe end, for sending control signals to drive it to open or close.

[0021] Preferably, the central control unit has a built-in time control module, which is used to automatically send an opening command to the pneumatic butterfly valve according to a preset time period to perform preventive cleaning.

[0022] Preferably, the vacuum dust removal system is equipped with a differential pressure sensor near the inlet end of the dust suction pipe, and the differential pressure sensor is connected to the signal input terminal of the central control unit; the central control unit is configured to automatically send an opening command to the pneumatic butterfly valve to perform responsive unblocking when the pressure value fed back by the differential pressure sensor exceeds a preset blockage threshold.

[0023] Preferably, the gas-solid separation and collection device is a multi-stage dust removal unit, which includes a primary cyclone dust collector and a secondary bag or flat bag dust collector connected in series with it.

[0024] This technical solution utilizes the instantaneous opening of a pneumatic butterfly valve to create a highly concentrated high-pressure gas pulse. Its impact force far exceeds that of mechanical vibration or continuous airflow, instantly stripping and pulverizing sticky and hardened blockages, resulting in excellent unblocking performance. It can be integrated into PLC and other control systems to achieve timed automatic cleaning or intelligently identify and automatically remove blockages based on pressure differentials, realizing true online, unmanned operation and ensuring continuous production. The device consists of mature pneumatic components and a simple mechanical structure, with no moving friction parts, resulting in a low failure rate, easy maintenance, and no mechanical fatigue damage to the main pipeline, ensuring a long service life. Online unblocking avoids downtime for manual operation, eliminating secondary dust emissions and the risk of personnel contact. Simultaneously, the silencer effectively controls operating noise, meeting the environmental protection requirements of modern industry. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0026] Figure 1 This is a schematic front view of the anti-clogging cleaning device and dust removal system for the end of a vacuum dust removal tube according to an embodiment of this application.

[0027] Figure 2This is a three-dimensional structural diagram of the anti-clogging cleaning device and dust removal system for the end of a vacuum dust removal tube according to an embodiment of this application.

[0028] Figure 3 This is an enlarged structural diagram of embodiment A of this application;

[0029] Figure 4 This is an enlarged structural diagram of embodiment B of this application;

[0030] Figure 5 This is a cross-sectional schematic diagram of an anti-clogging cleaning device for the end of a vacuum dust removal tube according to an embodiment of this application;

[0031] Figure 6 This is an enlarged structural diagram of embodiment C of this application. Detailed Implementation

[0032] 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 scope of protection of this application.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0035] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0036] See Figure 1-6As shown, this application proposes an anti-clogging cleaning device for the end of a vacuum dust removal pipe, applied to the inlet end of the suction pipe of a vacuum dust removal system, comprising:

[0037] Pneumatic butterfly valve 1, the air inlet of pneumatic butterfly valve 1 is suitable for connection to a high-pressure air source, and is used to open or close the air circuit instantaneously according to the control signal;

[0038] Silencer 2, the air inlet end of silencer 2 is airtightly connected to the air outlet end of pneumatic butterfly valve 1; and

[0039] The filter 3 has a base end that is airtightly connected to the outlet end of the silencer 2. The filter 3 has multiple air jet holes for spraying gas outward. The filter 3 is suitable for positioning in the inlet area of ​​the dust suction pipe during operation.

[0040] Specifically, during normal vacuum cleaning, the anti-clogging cleaning device at the end of the vacuum dust removal pipe is in a silent standby state. Pneumatic butterfly valve 1 is in the closed position, cutting off the connection between the external high-pressure gas source and the device. The airflow carrying material in the vacuum pipe flows past the outside of filter 3. When cleaning conditions are met, for example, a command is issued by the control system, and an electrical signal is sent to pneumatic butterfly valve 1. Upon receiving the signal, pneumatic butterfly valve 1 opens completely within milliseconds. This opening action releases a highly concentrated high-pressure gas pulse. The high-energy gas pulse then enters the silencer 2, which is airtightly connected to it. The intense sound energy generated during gas release is significantly reduced and absorbed, allowing the overall forward kinetic energy to be maintained. The noise-reduced airflow pulse finally enters the internal cavity of filter 3. Due to the closed front end of the ejector, the airflow outlet path is multiple jet holes opened on the side wall. The high-pressure gas is forced out of the jet holes at high speed, and its pressure energy is converted into the kinetic energy of multiple high-speed jets. The jets combine to form a three-dimensional reverse shock wave that flows in the opposite direction to the normal suction airflow and covers the entire inner wall of the pipe. This powerful and thorough blasting blows away any material adhering to or accumulated on the outer wall of filter 3 and the inner wall of the pipe inlet. After the pulse ends, the pneumatic butterfly valve 1 immediately closes. At this point, the reverse impact disappears, the entire system returns to vacuum suction, and the blown-off material is successfully sucked up.

[0041] The above technical solution essentially achieves the following technical effects:

[0042] The pneumatic butterfly valve 1 and filter 3 work synergistically. The former ensures the instantaneous and concentrated release of energy, forming a gas pulse with extremely high peak power; the latter converts this energy into a comprehensive, multi-point high-speed jet. Therefore, this solution can generate an impact force far exceeding that of traditional continuous airflow or mechanical vibration, effectively handling various stubborn blockages such as viscous and hardened blockages, with a thorough unblocking effect.

[0043] The silencer 2 effectively solves the problem of excessive noise generated by pulse jet while retaining the core impact force. Furthermore, the device has a simple and robust structure. Its cleaning method is non-contact, causing no mechanical wear on the pipeline. Therefore, this solution has high operational reliability and a low failure rate.

[0044] Preferably, the pneumatic butterfly valve 1 is an electromagnetic pneumatic valve, and the pneumatic butterfly valve 1 is equipped with an electromagnetic actuator that receives electrical signals to control the valve's movement. Specifically, the use of an electromagnetic pneumatic valve enables the entire cleaning device to be precisely controlled by an automated and intelligent system. This ensures that the intensity and duration of the cleaning pulses reach the optimal design values, laying the foundation for subsequent timed cleaning and response; thereby improving the automation level and operational reliability of the device.

[0045] Preferably, the main body of the filter 3 is a cage-like or cylindrical structure with a closed front end, and multiple jet holes are densely and evenly distributed on the sidewalls of the filter 3. Specifically, the design of the filter 3 as a cage-like or cylindrical structure with a closed front end blocks the path of airflow directly injected along the axial direction of the pipe. At the same time, by opening the jet holes only on the sidewalls, all high-pressure gas must be ejected radially, that is, perpendicular to the centerline of the pipe. The dense and uniform distribution ensures that the intensity and density of the ejected airflow are consistent throughout the entire 360° circumference.

[0046] Understandably, the above-mentioned structural design ensures that the generated backflush shock wave can act evenly and without dead angles on the entire inner wall cross-section of the pipe, thereby avoiding the defect of traditional one-way nozzles that can only clean local areas. It achieves full coverage cleaning of the material attached to the pipe wall, improves the thoroughness of a single cleaning, and ensures the unblocking effect.

[0047] Preferably, multiple jet orifices are arranged in a spiral or annular array on the sidewalls of the cage-like or cylindrical structure to form a three-dimensional airflow with a rotational component during injection. Specifically, the spiral or annular array design ensures that the high-speed jet ejected from each micro-orifice is no longer a simple radial straight line, but has a preset tangential velocity component. This means that when all the jets converge, they naturally form a high-speed rotating, forward-propelling three-dimensional impact flow.

[0048] By applying the structure described in this embodiment, the cleaning force is upgraded from a single impact force to a composite force combining impact force and rotational shear force. As a result, the rotational shear force can produce a powerful peeling effect on materials that are sticky and firmly attached. Therefore, the ability to remove stubborn blockages is greatly improved compared to the efficiency of a single radial impact.

[0049] Preferably, the silencer 2 is an impedance composite silencer 2. In this embodiment, the impedance composite silencer 2 has a wide noise spectrum generated by the high-energy gas pulse. This design can effectively suppress the full-spectrum noise generated by the pulse jet, so that the instantaneous noise during device operation can be controlled within the range allowed by industrial safety standards. This not only improves the working environment and meets occupational health requirements, but also makes this device widely applicable in various industrial scenarios, thus improving its practicality.

[0050] This embodiment also discloses a dust removal system for an anti-clogging cleaning device for the end of a vacuum dust removal tube, including:

[0051] Power source 4 for generating negative pressure in pipe network 5; gas-solid separation and collection device 6; and pipe network 5 connecting power source 4, gas-solid separation and collection device 6 and at least one dust suction port;

[0052] The vacuum dust removal system also includes an anti-clogging cleaning device for the end of the vacuum dust removal pipe as described in any one of claims 1 to 5, which is disposed at the inlet end of at least one dust suction port pipe.

[0053] Specifically, the above implementation involves the following steps: First, the power source 4 is typically a high-power centrifugal fan or Roots blower, which continuously operates to ensure a stable negative pressure environment within the entire pipeline network 5. Driven by this negative pressure, the suction ports located at one or more work points generate strong suction, drawing dust-laden air or loose materials from the outside into the pipeline network 5. The sucked-in materials and airflow travel along the path of the pipeline network 5, first passing through the pre-filter 8 installed along the main pipeline. The main function of the pre-filter 8 is to perform preliminary gas-solid separation, using inertia or centrifugal force to pre-separate and collect larger, denser dust particles or materials in the airflow. This pre-treatment reduces the dust load on the subsequent main dust collection unit, thereby protecting the filter media of the main dust collection unit from the erosion of large or abrasive particles, extending its service life, and improving the overall system's filtration efficiency and stability.

[0054] After initial purification by the pre-filter 8, the airflow carrying remaining fine dust is further conveyed to the gas-solid separation and collection device 6, which serves as the main dust removal unit. Solid particles are separated from the airflow and collected under the action of centrifugal force and the filter media. The purified clean air then continues to flow to the power source 4 and is eventually discharged from the system, forming a continuous vacuum dust removal and material conveying process.

[0055] It should be noted that the pre-filter 8 is a movable, barrel-type interception device, mainly composed of the following parts: a dust bin, the main body of the device, used to collect and contain the separated dust and particulate matter; a lid, located on top of the dust bin, with an air inlet and outlet for connecting the hose; a filter screen, installed inside the bin, which is the core component for achieving gas-solid separation; three latches to tightly lock the lid and dust bin together, ensuring a tight seal; rubber strips installed at the junction of the lid and the bin body, providing a seal and preventing air leakage; and three casters installed at the bottom of the dust bin, allowing the entire device to be easily moved. During operation, the airflow containing dust and debris is drawn into the dust bin through the air inlet hose. Because the internal space of the dust bin is much larger than the diameter of the hose, the airflow velocity decreases rapidly. As the airflow slows down, heavier and larger particles lose kinetic energy and settle from the airflow due to inertia, falling directly to the bottom of the dust bin. The airflow carrying the remaining fine dust continues upward, passing through an internal filter before reaching the outlet. The filter traps the fine dust, preventing it from passing through. The relatively clean air, after two stages of purification, is finally discharged from the outlet and flows to the downstream vacuum power source or main dust collection system.

[0056] When the system is performing normal vacuum cleaning, the anti-clogging cleaning device at the end of the vacuum dust removal pipe is in a silent standby state. Pneumatic butterfly valve 1 is in the closed position, cutting off the passage between the external high-pressure gas source and the device. The airflow in the vacuum pipe carries material through the outside of filter 3. When cleaning conditions are met, for example, a command is issued by the control system, and an electrical signal is sent to pneumatic butterfly valve 1. Upon receiving the signal, pneumatic butterfly valve 1 opens completely within milliseconds. This opening action releases a highly concentrated high-pressure gas pulse. The high-energy gas pulse then enters the silencer 2, which is airtightly connected to it. At this time, the intense sound energy generated during gas release is significantly reduced and absorbed, allowing the overall forward impact kinetic energy to be basically maintained. The noise-reduced airflow pulse finally enters the internal cavity of filter 3. Because the front end of the ejector is closed, the airflow outlet path is multiple jet holes opened on the side wall. The high-pressure gas is forced out of the jet holes at high speed, and its pressure energy is converted into the kinetic energy of multiple high-speed jets. The jets combine to form a three-dimensional reverse shock wave that flows in the opposite direction to the normal suction airflow and covers the entire inner wall of the pipe. This powerful and thorough blasting blows away any material adhering to or accumulated on the outer wall of filter 3 and the inner wall of the pipe inlet. After the pulse ends, the pneumatic butterfly valve 1 immediately closes. At this point, the reverse impact disappears, the entire system returns to vacuum suction, and the blown-off material is successfully sucked up.

[0057] By seamlessly integrating a highly efficient cleaning device into the vacuum dust removal system, production continuity is maximized, avoiding downtime losses caused by blockages. Since pipe blockage is a gradual process, the effective flow area of ​​the pipe decreases before it becomes completely blocked, leading to a decline in system efficiency. This solution's online cleaning capability ensures that the pipe inlet remains unobstructed at all times.

[0058] Preferably, the vacuum dust removal system further includes a central control unit 7. The signal output terminal of the central control unit 7 is electrically connected to the pneumatic butterfly valve in the anti-clogging cleaning device for the vacuum dust removal pipe end, and is used to send control signals to drive it to open or close. It can be understood that the above configuration achieves a high degree of automation and intelligence in the entire cleaning function. It eliminates the reliance on manual intervention and ensures the precise performance of the cleaning actions.

[0059] Preferably, the central control unit 7 has a built-in time control module. This module automatically sends an opening command to the pneumatic butterfly valve 1 according to a preset time cycle to perform preventative cleaning. In one embodiment, for operating conditions with strong clogging patterns, for example, if it is known that a certain material tends to adhere to the blockage after 30 minutes of continuous conveying, an automatic cleaning cycle of less than 30 minutes can be set. This allows for cleaning before the blockage material accumulates or is easily removed, thereby maximizing production continuity.

[0060] Preferably, the vacuum dust removal system has a differential pressure sensor installed near the inlet of the suction pipe, and the differential pressure sensor is connected to the signal input terminal of the central control unit 7. The central control unit 7 is configured to automatically send an opening command to the pneumatic butterfly valve 1 when the pressure value fed back by the differential pressure sensor exceeds a preset blockage threshold, so as to perform responsive unblocking. Specifically, configuring a differential pressure sensor ensures that the system only starts cleaning when needed, avoiding unnecessary compressed air consumption and achieving energy saving.

[0061] Preferably, the gas-solid separation and collection device 6 is a multi-stage dust removal unit, which includes a primary cyclone dust collector 61 and a secondary bag or flat bag dust collector 62 connected in series with it. Specifically, the combined structure of the primary cyclone dust collector 61 and the secondary bag or flat bag dust collector 62 connected in series with it enables gradient separation of dust. More specifically, the primary cyclone dust collector 61 uses centrifugal force to separate most of the large and heavy dust particles. The secondary bag dust collector 62 can capture micron- and submicron-sized fine dust that the primary cyclone dust collector 61 cannot handle. The combined series design achieves comprehensive dust removal efficiency and a longer system maintenance cycle. Because the primary cyclone dust collector 61 reduces the dust load entering the secondary bag or flat bag dust collector 62, it extends the service life of the filter bags in the secondary bag or flat bag dust collector 62, reducing the frequency of dust cleaning and replacement costs.

[0062] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. An anti-clogging cleaning device for the end of a vacuum dust removal pipe, applied to the inlet end of the suction pipe of a vacuum dust removal system, characterized in that, include: A pneumatic butterfly valve, wherein the air inlet of the pneumatic butterfly valve is adapted to be connected to a high-pressure air source, and is used to instantaneously open or close the air circuit according to a control signal; A silencer, wherein the air inlet of the silencer is airtightly connected to the air outlet of the pneumatic butterfly valve; as well as The filter has a base end that is airtightly connected to the outlet end of the silencer. The filter has multiple air jet holes for spraying gas outwards. The filter is adapted to be positioned in the inlet area of ​​the dust suction pipe during operation.

2. The anti-clogging cleaning device for the end of a vacuum dust removal tube according to claim 1, characterized in that, The pneumatic butterfly valve is an electromagnetic pneumatic valve, and the pneumatic butterfly valve is equipped with an electromagnetic actuator that receives electrical signals to control the valve's operation.

3. The anti-clogging cleaning device for the end of a vacuum dust removal tube according to claim 1, characterized in that, The main body of the filter is a cage-like or cylindrical structure with a closed front end, and the multiple air jet holes are densely and evenly distributed on the side wall of the filter.

4. The anti-clogging cleaning device for the end of a vacuum dust removal tube according to claim 3, characterized in that, The plurality of jet holes are arranged in a spiral or annular array on the sidewall of the cage-like or cylindrical structure to form a three-dimensional airflow with a rotational component during jetting.

5. The anti-clogging cleaning device for the end of a vacuum dust removal tube according to claim 1, characterized in that, The silencer is an impedance composite silencer.

6. A dust removal system for an anti-clogging cleaning device at the end of a vacuum dust removal pipe, characterized in that, include: A power source used to generate negative pressure in the pipeline network; At least one pre-filter is installed along the pipeline network; Gas-solid separation and collection device; And a network of pipes connecting the power source, the gas-solid separation and collection device and at least one dust suction port; The vacuum dust removal system further includes an anti-blocking cleaning device for the vacuum dust removal pipe end as described in any one of claims 1 to 5, which is disposed at the inlet end of the at least one dust suction port pipe.

7. The dust removal system according to claim 6, characterized in that, The vacuum dust removal system also includes a central control unit. The signal output terminal of the central control unit is electrically connected to the pneumatic butterfly valve in the anti-blocking cleaning device for the vacuum dust removal pipe end, and is used to send control signals to drive it to open or close.

8. The dust removal system according to claim 7, characterized in that, The central control unit has a built-in time control module, which is used to automatically send an opening command to the pneumatic butterfly valve according to a preset time period to perform preventive cleaning.

9. The dust removal system according to claim 7, characterized in that, The vacuum dust removal system is equipped with a differential pressure sensor near the inlet end of the suction pipe. The differential pressure sensor is connected to the signal input terminal of the central control unit. The central control unit is configured to automatically send an opening command to the pneumatic butterfly valve to perform responsive unblocking when the pressure value fed back by the differential pressure sensor exceeds a preset blockage threshold.

10. The dust removal system according to claim 6, characterized in that, The gas-solid separation and collection device is a multi-stage dust removal unit, which includes a primary cyclone dust collector and a secondary bag or flat bag dust collector connected in series with it.

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