Coal dust reduction system

Abstract

This invention discloses a coal conveying dust suppression system, belonging to the field of dust collector technology. The invention includes a bag filter and an air inlet located on one side of the lower part of the bag filter. An air outlet is connected to the upper part of the other side of the bag filter. Several sets of filter bags are arranged on the upper inner side of the bag filter, and a support frame is installed inside the filter bags. This invention allows the filter bags to be vibrated and impacted, causing dust adhering to the lower section to fall, thus achieving automatic dust removal from the lower section of the filter bags. This helps ensure the long-term ventilation effect of the filter bags. Simultaneously, only a small amount of gas needs to be injected into the pushing mechanism, and the pushing mechanism's impact dust removal is achieved by relying on the air guiding mechanism's response to the airflow pressure. During long-term dust suppression operation, this reduces the energy consumption of the jet cleaning mechanism and the jet cleaning frequency, achieving energy savings while maintaining dust suppression effectiveness.

Description

Technical Field

[0001] This invention belongs to the field of dust collector technology, specifically relating to a coal conveying dust reduction system. Background Technology

[0002] In coal conveying dust suppression systems, baghouse dust collectors are mainly used to collect and suppress coal dust during coal conveying. These baghouse dust collectors are environmental protection equipment used to control dust pollution in coal conveying systems. They are widely used in industries such as thermal power plants, coal mines, and steel. They can be used to control dust at key dust-generating nodes such as coal conveyor belt transfer points, crushing and screening sections, and vibrating screens, effectively reducing fugitive dust emissions and improving the working environment and air quality.

[0003] The existing coal conveying dust suppression systems use baghouse dust collectors, which rely on compressed air from the air tank to be injected into the filter bags to collect and remove dust. The bottom section of the filter bag is where dust-laden gas first comes into contact with and accumulates. If the jet cleaning is started directly, the jet frequency will increase over long-term operation, thus increasing the energy consumption required for jet cleaning. If jet cleaning is only started when the filter bag reaches the limit of overall air resistance, a large amount of dust will adhere to the lower section of the filter bag, affecting the air permeability of the filter bag and thus the efficiency of dust suppression. At the same time, when filtering moist and sticky coal dust, the sticky dust easily adheres to the surface of the filter bag and is difficult to clean with jet cleaning.

[0004] Therefore, we proposed a coal conveying dust suppression system to address the aforementioned problems. Summary of the Invention

[0005] In view of the problems in existing technology, where dust-laden gas first accumulates at the bottom of the filter bag, and directly starting the jet cleaning to remove dust will increase the jet frequency and energy consumption of the jet cleaning under long-term operation, and if the entire dust is accumulated before jet cleaning, it will affect the ventilation effect of the filter bag and the efficiency of dust removal. The purpose of this invention is to provide a coal conveying dust removal system.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows: a coal conveying dust suppression system, including a bag filter and an air inlet located on one side below the bag filter, an air outlet connected to the upper side of the other side of the bag filter, several sets of filter bags arranged on the upper inner side of the bag filter, and a support frame installed inside the filter bags, an isolation top plate installed on the top of the support frame, a jet cleaning mechanism installed on one side above the bag filter, and a dust discharge port located in the lower middle part of the bag filter;

[0007] The support frame has air guiding mechanisms installed on both sides of the lower interior, and a pushing mechanism is installed at the bottom of the air guiding mechanism. The support frame has scraping mechanisms on both the front and rear sides, and the scraping mechanisms are connected to the blowing mechanism. Several sets of scraping mechanisms are arranged from top to bottom around the support frame.

[0008] Furthermore, the spraying mechanism includes a jet pipe mounted on a support frame, with several sets of flow pipes connected to the lower center of the jet pipe, an air distribution ring connected to the outer side of the middle of the flow pipe, and a jet head installed on the outside of the air distribution ring, with the jet head arranged in a ring around the air distribution ring.

[0009] Furthermore, the air guiding mechanism includes an air pipe fixed on a support frame, a variable diameter ring fixed in the middle of the inner side of the air pipe, a fixed end fixed at the top of the air pipe, and a movable plate slidably installed in the middle of the inner side of the fixed end, with the outer wall of the movable plate slapping against the inner wall of the fixed end.

[0010] Furthermore, springs are fixedly connected to both sides of the bottom of the movable plate, and the bottom end of springs is fixedly connected to the inner wall of the fixed end. An air outlet is provided in the middle of the outer surface of the fixed end, and the air outlet is arranged in a ring around the fixed end. A connecting rod is fixedly connected to the lower middle of the movable plate, and a contact seat is installed on the top of the fixed end.

[0011] Furthermore, the pushing mechanism includes an air cylinder fixed on a support frame. An air vent is provided on one of the upper sides of the air cylinder, and a sealing plug is elastically installed in the upper center of the air vent. The sealing plug is elastically connected to the air cylinder by a spring. The upper side of the sealing plug is rotatably mounted on one end of a linkage rod, and the other end of the linkage rod is rotatably connected to a connecting rod.

[0012] Furthermore, an air intake pipe is connected to the upper side of one side of the air cylinder, and an air intake valve is installed at the top of the air intake pipe. The air intake pipe and the air intake valve are connected to the air jet pipe. A sliding rod is slidably installed in the middle of the inner side of the air cylinder, and a movable plate is fixed to one end of the sliding rod. The outer surface of the movable plate is in contact with the inner surface of the air cylinder. A spring is fixedly installed on one side of the movable plate, and the other side of the spring is fixedly connected to the inner wall of the air cylinder. A push plate is fixed to the other end of the sliding rod.

[0013] Furthermore, the second movable plate includes a slot formed on the inner surface of the first air cylinder, and the outer surface of the slot is provided with a rounded chamfer. A locking head is provided on the upper part of the inside of the slot.

[0014] Furthermore, a second spring is fixed to the upper end of the locking head, and a mounting groove is provided on the outside of the second spring. The upper end of the second spring is fixedly connected to the top of the mounting groove, and the locking head is elastically connected to the mounting groove through the second spring.

[0015] Furthermore, the scraping mechanism includes an air cylinder two fixed on a support frame, and an air inlet pipe two is connected to the upper side of the air cylinder two. The air cylinder two is connected to a flow pipe via the air inlet pipe two. A movable block is slidably installed inside the upper part of the air cylinder two, and the outer surface of the movable block is in contact with the inner surface of the air cylinder two. A spring four is fixedly installed below the movable block.

[0016] Furthermore, a sliding ring is slidably provided on the outer surface of the second air cylinder, a scraper is provided on the outer side of the sliding ring, and the scraper is in contact with the outer surface of the filter bag. A metal ring is provided inside the scraper, and a pressure relief valve is installed on the upper rear side of the second air cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The filter bag of this invention can cause dust adhering to the lower section to fall under the action of impact and vibration, thereby achieving the effect of automatic dust removal in the lower section of the filter bag. This helps to ensure the long-term ventilation effect of the filter bag as a whole. At the same time, only a small amount of gas needs to be filled into the pushing mechanism, and then the response of the air guiding mechanism to the airflow pressure can realize the pushing mechanism to impact and remove dust. In long-term dust removal work, it helps to reduce the consumption of air jet energy of the jet cleaning mechanism and reduce the jet cleaning frequency of the jet cleaning mechanism. While ensuring the dust removal effect, it also achieves energy saving effect.

[0019] 2. In this invention, the elastic structure will only rebound and impact the dust after the air pressure inside the pushing mechanism is discharged. This allows both high-density and low-density dust to be effectively impacted and disposed of during filtration, ensuring the dust reduction effect and preventing low-density dust from slowly adhering to the surface of the filter bag, causing the elastic structure to slowly release and resulting in impact failure.

[0020] 3. This invention can scrape and clean the filter bag, thereby cooperating with the blowing mechanism and the impact dust removal mechanism to further improve the dust removal effect on the outer surface of the filter bag. It also helps to further reduce the blowing frequency of the blowing mechanism and reduce the energy consumption of the blowing mechanism alone. When filtering wet and sticky coal dust, it helps to scrape the sticky dust off the filter bag, avoiding the problem that it is difficult to effectively remove dust using the blowing and pushing mechanisms when the coal dust is wet and sticky. This invention can improve the dust removal effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the bag filter of the present invention;

[0022] Figure 2 This is a cross-sectional three-dimensional structural diagram of the bag filter of the present invention;

[0023] Figure 3 This is a cross-sectional three-dimensional structural diagram of the filter bag and support frame of the present invention;

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the filter bag separation;

[0025] Figure 5 For the present invention Figure 4 Enlarged 3D structural diagram of the lower middle region;

[0026] Figure 6 For the present invention Figure 4 Enlarged 3D structural diagram of the upper middle region;

[0027] Figure 7 This is a cross-sectional three-dimensional structural diagram of the vent pipe of the present invention;

[0028] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0029] Figure 9 For the present invention Figure 7 Enlarged structural diagram at point B;

[0030] Figure 10 For the present invention Figure 7 Enlarged structural diagram at point C;

[0031] Figure 11 This is a two-section view of the internal three-dimensional structure of the air cylinder of the present invention;

[0032] Figure 12 This is a schematic diagram of the three-dimensional structure of the metal ring separation of the present invention;

[0033] Figure 13 For the present invention Figure 11 Enlarged structural diagram at point D.

[0034] In the diagram: 1. Baghouse dust collector; 2. Air inlet; 3. Air outlet; 4. Filter bag; 5. Support frame; 6. Isolation top plate; 7. Pulse cleaning mechanism; 71. Air jet pipe; 72. Flow pipe; 73. Air distribution ring; 74. Air jet head; 8. Air guiding mechanism; 81. Ventilation pipe; 82. Variable diameter ring; 83. Fixed end; 84. Movable plate one; 85. Spring one; 86. Air outlet; 87. Connecting rod; 88. Contact seat; 9. Pushing mechanism; 91. Air cylinder one; 92. Vent; 93. Sealing... 94. Plug; 95. Linkage rod; 96. Air duct one; 97. Sliding rod; 98. Movable plate two; 99. Mounting slot; 90. Spring two; 91. Engaging head; 92. Slot; 93. Spring three; 94. Push plate; 95. Air duct valve; 10. Scraper mechanism; 106. Air cylinder two; 107. Air duct two; 108. Movable block; 109. Spring four; 100. Sliding ring; 101. Scraper; 102. Metal ring; 103. Pressure relief valve; 20. Dust outlet. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments.

[0036] To address the issue of dust-laden gas accumulating at the bottom of the filter bag, directly initiating jet cleaning would increase the jet frequency and energy consumption over long-term operation. Furthermore, performing overall dust accumulation before jet cleaning would negatively impact the airflow of filter bag 4 and reduce dust collection efficiency. Figure 1 - Figure 9 As shown:

[0037] The coal conveying dust suppression system includes a bag filter 1 and an air inlet 2 located on one side below the bag filter 1. The input end of the air inlet 2 is connected to the exhaust equipment of the coal conveying site, which can introduce dust-laden gas into the bag filter 1 for treatment. An air outlet 3 is connected to the upper side of the other side of the bag filter 1. An exhaust pump is installed at the output end of the air outlet 3, which can lead the gas treated by dust suppression in the bag filter 1 outward. Several sets of filter bags 4 are arranged on the upper inner side of the bag filter 1. After the dust-laden gas is introduced into the bag filter 1, the dust is adsorbed on the filter bags 4. The gas passes through the filter bags 4 and enters the upper housing of the bag filter 1, and is discharged from the air outlet 3. The filter bags 4 are equipped with a support frame 5. The support frame 5 is a cylindrical grid structure, which can support the filter bags 4 wrapped on the outside, prevent the filter bags 4 from collapsing or deforming under the impact of airflow, and ensure the stability of the filtration area.

[0038] An isolation top plate 6 is installed on the top of the support frame 5. The isolation top plate 6 is used to fix the support frame 5 and the filter bags 4 inside the bag dust collector 1. The isolation top plate 6 can also block the gas, so that the gas can only pass through the filter bags 4 and then flow into the upper box of the bag dust collector 1, and finally be discharged from the outlet 3. A jet blowing mechanism 7 is installed on the upper side of the bag dust collector 1. The output end of the jet blowing mechanism 7 is set at the top opening of multiple sets of filter bags 4. The jet blowing mechanism 7 is equipped with an air tank and an electromagnetic pulse valve, and is controlled by a controller. The controller can control and trigger the electromagnetic pulse valve, so that the compressed air in the air tank is injected into the filter bags 4, causing the filter bags 4 to be blown and expanded, allowing the dust to fall into the ash hopper at the bottom of the bag dust collector 1 and then be discharged from the machine. A dust discharge port 20 is set in the lower middle part of the bag dust collector 1, and the dust will eventually be discharged from the dust discharge port 20.

[0039] Air guiding mechanisms 8 are installed on both sides of the lower interior of the support frame 5, and a pushing mechanism 9 is installed at the bottom of the air guiding mechanism 8. When dust-laden gas is introduced into the bag filter 1, after the gas passes through the filter bag 4, it is guided by the exhaust of the air pump at the outlet 3. The filtered gas will flow upward from the inside of the filter bag 4. Due to the air pump at the outlet 3, the filtered gas will have an upward flow velocity. When the filter bag 4 is filtering in its normal state, the gas with a certain flow velocity will pass through the air guiding mechanism 8. The air guiding mechanism 8 has a narrowing structure inside, which can accelerate the gas flow. The gas accelerates through the inside of the air guiding mechanism 8. At this time, the accelerated airflow will generate a thrust on the top of the inner side of the air guiding mechanism 8. The top of the air guiding mechanism 8 is linked with the exhaust part of the pushing mechanism 9. When the filter bag 4 is filtering in its normal state, the top of the inner side of the air guiding mechanism 8 is in an upward pushing state when the gas accelerates through the inside of the air guiding mechanism 8. At this time, under the action of the linkage structure, the exhaust part of the pushing mechanism 9 is in a closed state.

[0040] The pushing mechanism 9 is connected to the air pipe of the blowing mechanism 7 via a solenoid valve. Under the control of the controller, the solenoid valve can divert a portion of the gas in the air pipe of the blowing mechanism 7 to the pushing mechanism 9, allowing the pushing mechanism 9 to be inflated, thus preparing for subsequent dust removal. The air guiding mechanism 8 and the pushing mechanism 9 are located inside the lower part of the filter bag 4. Since the bottom part of the filter bag 4 comes into contact with the dust-laden gas first, after a period of filtration, the lower part of the filter bag 4 will have more dust attached than the upper part, which will cause the ventilation effect of the lower part of the filter bag 4 to deteriorate. The filter bag 4 may not have reached the limit range of the overall ventilation resistance. If the blowing mechanism 7 is started directly to blow dust at this time, the blowing frequency of the blowing mechanism 7 will increase under long-term operation, thus increasing the energy consumption of the blowing mechanism 7. If the blowing mechanism 7 is started to blow dust after the filter bag 4 reaches the limit range of the overall ventilation resistance, more dust will be attached to the lower part of the filter bag 4 in advance, which will affect the ventilation effect of the filter bag 4 and thus affect the dust removal efficiency.

[0041] When the dust content of the introduced gas is high, causing dust to accumulate prematurely in the lower section of filter bag 4, the airflow velocity inside the filter bag 4 decreases as dust rapidly accumulates. This weakens the airflow through the air guiding mechanism 8, reducing the thrust at the top of the inner side of the mechanism. This reduced thrust causes the linkage between the air guiding mechanism 8 and the pushing mechanism 9 to move downwards, eventually opening the exhaust port of the pushing mechanism 9. This releases the air from the inflated mechanism 9. After the release, the gas pressure in the pushing mechanism 9 disappears, and due to the elastic structure within the pushing mechanism 9, the top plate on the outer side of the mechanism 9 springs forward. The forward-moving top plate impacts the filter bag 4, causing dust adhering to the lower section of the filter bag 4 to fall due to the impact and vibration. This achieves automatic dust removal in the lower section of the filter bag 4, thus ensuring the long-term ventilation effect of the filter bag 4. At the same time, only a small amount of gas needs to be injected into the pushing mechanism 9, and the pushing mechanism 9 can achieve the effect of pushing and impacting the dust to fall by relying on the air guide mechanism 8's response to the airflow pressure. During long-term dust suppression, this helps reduce the energy consumption of the jet blowing mechanism 7 and the jet blowing frequency of the jet blowing mechanism 7, achieving energy saving while ensuring the dust suppression effect.

[0042] The elastic structure of the pushing mechanism 9 is equipped with a locking and release mechanism. After the pushing mechanism 9 is inflated, the inflation pressure will push the elastic structure of the pushing mechanism 9 to move, causing the locking mechanism of the pushing mechanism 9 to engage. At this time, the exhaust pressure of the pushing mechanism 9 is slightly greater than the inflation pressure, and the locking force of the locking mechanism is less than the rebound pull of the elastic structure acting alone. When there is still air pressure in the pushing mechanism 9, the locking mechanism will be in the locked state under the action of air pressure. When the air guiding mechanism 8 is linked with the pushing mechanism 9 to exhaust air, after the air pressure in the pushing mechanism 9 is exhausted, the locking mechanism will be pulled apart by the rebound pull of the elastic structure, causing... The top plate of the pushing mechanism 9 moves forward rapidly under the action of the rebound force, thereby achieving the effect of rapid impact and vibration of the filter bag 4 to remove dust. This allows the locking mechanism to achieve rapid impact and dust removal, preventing low-density dust from slowly adhering to the surface of the filter bag 4 and causing the airflow inside the filter bag 4 to gradually weaken. Ultimately, this causes the pushing mechanism 9 to slowly exhaust air, resulting in the slow release of the elastic structure and the problem of impact failure. Only after the air pressure inside the pushing mechanism 9 is discharged will the elastic structure rebound and impact and remove dust. This ensures that both high-density and low-density dust can be effectively impacted and removed during filtration, guaranteeing the dust reduction effect.

[0043] Scraping mechanisms 10 are provided on both the front and rear sides of the support frame 5, and the scraping mechanisms 10 are connected to the blowing mechanism 7. Several sets of scraping mechanisms 10 are arranged from top to bottom on the support frame 5. When the blowing mechanism 7 blows dust into the filter bag 4, some gas will be diverted into the scraping mechanism 10. As the scraping mechanism 10 is continuously filled with air, the elastic mechanism inside the scraping mechanism 10 will be compressed and moved under the action of air pressure. The elastic mechanism inside the scraping mechanism 10 is magnetically connected to the scraping structure on the outer surface of the filter bag 4. When the elastic mechanism is moved by air pressure, under the action of magnetic adsorption force, the elastic mechanism will synchronously drive the scraping structure on the outer surface of the filter bag 4 to move. At the same time, when the scraping mechanism 10 is filled with a certain amount of air, the controller will control the electromagnetic vent valve above the scraping mechanism 10 to open, so that the internal pressure of the scraping mechanism 10 is released. Under the action of the elastic force of the elastic mechanism, the scraping structure on the outer surface of the filter bag 4 will move in the opposite direction.

[0044] By utilizing the air inflation and deflation of the scraping mechanism 10, the scraping structure reciprocates on the outer surface of the filter bag 4, enabling the scraping and dust removal of the filter bag 4. This, combined with the blowing of the jet cleaning mechanism 7 and the impact dust removal of the pushing mechanism 9, further improves the dust removal effect on the outer surface of the filter bag 4. It also helps to further reduce the blowing frequency of the jet cleaning mechanism 7, reducing the energy consumption of the jet cleaning mechanism 7 when used alone. Furthermore, the scraping mechanism 10 achieves the scraping effect on the outer surface of the filter bag 4. When filtering moist and sticky coal dust, it helps to scrape the sticky dust off the filter bag 4, avoiding the problem that it is difficult to effectively remove dust when the coal dust is moist and sticky using the jet cleaning mechanism 7 and the pushing mechanism 9. This helps to improve the dust removal effect. At the same time, the scraping structure on the outer surface of the filter bag 4 can also play a role in binding and securing the filter bag 4, preventing the filter bag 4 from deforming and affecting the dust removal effect of the jet cleaning mechanism 7 and the pushing mechanism 9.

[0045] The jet cleaning mechanism 7 includes a jet pipe 71 mounted on a support frame 5. The jet pipe 71 is connected to an external air tank and an electromagnetic pulse valve. Several sets of flow pipes 72 are connected to the lower middle part of the jet pipe 71. Each filter bag 4 is provided with a flow pipe 72 inside. Using the flow pipes 72, the gas jetted by the jet pipe 71 can be introduced into the filter bag 4, thereby performing jet cleaning and dust removal treatment on the filter bag 4. An air distribution ring 73 is connected to the outer side of the middle part of the flow pipe 72. A jet head 74 is installed on the outside of the air distribution ring 73. The jet head 74 is arranged in a ring around the air distribution ring 73. Several sets of air distribution rings are arranged from top to bottom around the flow pipes 72. The pulse gas in the jet pipe 71 can finally be jetted from the jet head 74 onto the inner surface of the filter bag 4, realizing multi-point jet distribution from inside the filter bag 4, making the jetting effect more uniform, and requiring less air volume compared to direct top jetting.

[0046] The air guiding mechanism 8 includes an air pipe 81 fixed on the support frame 5. The lower air inlet of the air pipe 81 has a variable diameter structure from top to bottom, so that the airflow will be accelerated when it enters the air pipe 81. A variable diameter ring 82 is fixed in the middle of the inner side of the air pipe 81. The variable diameter ring 82 makes the air pipe 81 form a constricted throat. When the airflow passes through the middle throat of the variable diameter ring 82, the cross-sectional area becomes smaller and the flow velocity increases, thereby accelerating the airflow again, so that the airflow has enough pressure to push the subsequent top plate to move upward. A fixed end 83 is fixed at the top of the air pipe 81, and a movable plate 84 is slidably installed in the middle of the inner side of the fixed end 83. The outer wall of the movable plate 84 is in contact with the inner wall of the fixed end 83. When the filtered gas flows upward from the inside of the filter bag 4, some of the airflow will flow into the air pipe 81. When the airflow flows upward through the air pipe 81 and the variable diameter ring 82, it will push the movable plate 84 upward under the action of air pressure.

[0047] Springs 85 are fixedly connected to both sides of the bottom of the movable plate 84, and the bottom end of the springs 85 is fixedly connected to the inner wall of the fixed end 83. When the movable plate 84 is pushed upward by air pressure, the springs 85 will be stretched. An air outlet 86 is opened in the middle of the outer surface of the fixed end 83, and the air outlet 86 is arranged in a ring around the fixed end 83. After the airflow flows through the vent pipe 81 and pushes the movable plate 84, it will finally be discharged outward from the air outlet 86. A connecting rod 87 is fixedly connected to the lower middle of the movable plate 84. The connecting rod 87 is linked with the pushing mechanism 9. When the filter bag 4 is filtering in the normal state, when the gas accelerates through the inside of the vent pipe 81, the movable plate 84 and the connecting rod 87 are in an upward state. At this time, under the action of the connecting rod 87, the exhaust part of the pushing mechanism 9 is closed. At the same time, when dust accumulates on the outside of the filter bag 4... When dust accumulates, the airflow eventually decreases, causing the movable plate 84 and connecting rod 87 to move downwards under the pull of the spring 85. At this time, the downward-moving connecting rod 87 will eventually open the exhaust port of the pushing mechanism 9. By taking advantage of the reduced airflow when the filter bag 4 is blocked, the pushing mechanism 9 can then perform subsequent impact dust removal. A contact seat 88 is installed on the top of the fixed end 83. The contact seat 88 is the contact switch of the external alarm of the device. When the airflow in the filter bag 4 exceeds the normal range and the flow rate continues to increase, the filter bag 4 may have a hole. At this time, the abnormal increase in airflow will drive the movable plate 84 to continue to move upwards, causing the movable plate 84 to contact and squeeze the contact seat 88. Under the control of the controller, the external alarm of the device will sound an alarm, thereby alerting the staff to the abnormality so that the staff can carry out maintenance or shutdown.

[0048] The pushing mechanism 9 includes an air cylinder 91 fixed on the support frame 5. An air vent 92 is provided on one of the upper sides of the air cylinder 91, and a sealing plug 93 is elastically installed in the upper center of the air vent 92. The sealing plug 93 is elastically connected to the air cylinder 91 by a spring. The exhaust pressure of the sealing plug 93 is slightly greater than the internal gas pressure of the air cylinder 91 after inflation. When the sealing plug 93 moves upward, it can open the air cylinder 91, allowing the gas inside the air cylinder 91 to be discharged. The upper side of the sealing plug 93 is rotatably mounted on one end of a linkage rod 94. The other end of 94 is rotatably connected to the connecting rod 87. The linkage rod 94 can be supported and rotated by the rotating seat fixed on the air cylinder 91. The rotating seat is close to the sealing plug 93, so that the linkage rod 94 forms a lever structure between the connecting rod 87 and the sealing plug 93. When dust accumulates and blocks the outside of the filter bag 4, the airflow will eventually decrease. When the connecting rod 87 moves down, the linkage rod 94 can amplify the force, so that the sealing plug 93 will be pulled up by the amplified force and open, thereby allowing the gas in the air cylinder 91 to be discharged.

[0049] An air intake pipe 95 is connected to the upper side of one side of the air cylinder 91, and an air intake valve 910 is installed at the top of the air intake pipe 95. The air intake pipe 95 and the air intake valve 910 are connected to the jet pipe 71. The air intake valve 910 is a solenoid valve and is controlled by a controller. It can open to draw some gas from the jet pipe 71 and fill the air cylinder 91 through the air intake pipe 95. A sliding rod 96 is slidably installed in the middle of the inner side of the air cylinder 91, and a movable plate 97 is fixed to one end of the sliding rod 96. The outer surface of the movable plate 97 is in contact with the inner surface of the air cylinder 91. One side of the movable plate 97... A spring 3 98 is fixedly installed, and the other side of the spring 3 98 is fixedly connected to the inner wall of the air cylinder 1 91. The other end of the sliding rod 96 is fixed with a push plate 99, which is an arc-shaped plate. The sliding part of the sliding rod 96 and the air cylinder 1 91 are sealed. When the air inlet pipe 1 95 fills part of the gas from the jet pipe 71 into the air cylinder 1 91, the filling air pressure will eventually push the movable plate 2 97 and the sliding rod 96 to move, so that the movable plate 2 97 drives the spring 3 98 to extend. At this time, the push plate 99, which is attached to the inner surface of the filter bag 4, will also be moved by the sliding rod 96, so that the push plate 99 moves away from the filter bag 4.

[0050] When the dust content of the gas introduced into the bag filter 1 is high, causing a significant amount of dust to adhere to the lower section of the filter bag 4 prematurely, the airflow velocity inside the lower part of the filter bag 4 will continuously decrease as the dust accumulates rapidly. At this time, the airflow passing through the vent pipe 81 will also decrease, eventually causing the movable plate 84 and the connecting rod 87 to move downwards. The connecting rod 87 and the linkage rotating rod 94 will eventually open the vent 92 to release the gas, causing the gas pressure in the air cylinder 91 to disappear after the gas is released. Under the rebound force of the spring 98, the movable plate 97 and the sliding rod 96 will move back, causing the push plate 99 to bounce forward. The forward-bouncing push plate 99 will then impact the filter bag 4, causing the dust adhering to the lower section of the filter bag 4 to fall off under the impact and vibration of the push plate 99. This achieves automatic dust removal in the lower section of the filter bag 4, thus helping to ensure the long-term ventilation effect of the filter bag 4.

[0051] Simultaneously, only a small amount of gas needs to be injected into the air cylinder 91. Then, relying on the response of the air guiding mechanism 8 to the pressure of the flowing air, the pushing plate 99 can be used to push and impact the dust to fall. After the airflow is cleared on the surface of the filter bag 4, the airflow velocity is restored. Finally, the movable plate 84 and the connecting rod 87 move upward again, causing the vent 92 to close again. The air cylinder 91 can be re-inflated for another impact dust falling process. In long-term dust suppression work, this helps to reduce the energy consumption of directly using the jet blowing mechanism 7 to blow dust and reduce the jet blowing frequency of the jet blowing mechanism 7. At the same time, the pushing and impacting action of the pushing plate 99 is achieved by relying on a portion of the gas diverted in the jet blowing mechanism 7, avoiding the trouble and high cost of setting up a separate power equipment. While ensuring the dust suppression effect, it also achieves energy saving.

[0052] To address the issue of varying dust densities in the treated dust-laden gas, which negatively impacts the dust suppression effect of impact vibration, such as... Figure 7 - Figure 10 As shown:

[0053] The movable plate 2 97 includes a slot 974 formed on the inner surface of the air cylinder 1 91, and the outer surface of the slot 974 is provided with a rounded chamfer. A locking head 973 is provided on the upper part of the slot 974. When the air cylinder 1 91 is inflated, causing the movable plate 2 97 to be pushed and moved by air pressure, the movable plate 2 97 will use the locking head 973 to lock with the slot 974, so that the movable plate 2 97 has the ability to lock and restrict movement after it moves.

[0054] A second spring 972 is fixed to the upper end of the locking head 973, and a mounting groove 971 is provided on the outside of the second spring 972. The upper end of the second spring 972 is fixedly connected to the top of the mounting groove 971. The locking head 973 is elastically connected to the mounting groove 971 through the second spring 972. The locking force between the second movable plate 97 and the first air cylinder 91, utilizing the locking head 973 and the locking groove 974, is less than the rebound force of the third spring 98 acting alone. When there is still air pressure in the first air cylinder 91, the pressure will cause the second movable plate 97 and the first air cylinder 91 to be in a locked state. When the air vent 92 releases air, after the air pressure in the first air cylinder 91 is released and disappears, the locking head 973 will... Pulled apart by the rebound force of spring 3 98, the movable plate 2 97 and the front push plate 99 move forward rapidly under the action of the rebound force, thereby achieving the effect of quickly impacting and vibrating the filter bag 4 to achieve dust removal. This prevents low-density dust from slowly adhering to the surface of the filter bag 4, causing the airflow inside the filter bag 4 to gradually weaken. Eventually, the vent 92 slowly opens to release air, causing spring 3 98 to slowly release and causing the push plate 99 to fail to impact. This ensures that the push plate 99 will only rebound and impact to remove dust after the air pressure in the air cylinder 1 91 is discharged. This allows the device to effectively impact and remove dust when filtering both high-density and low-density dust, ensuring the dust reduction effect.

[0055] To address the problem of sticky dust adhering to the surface of filter bags and being difficult to clean by air jet cleaning when filtering moist and somewhat sticky coal dust, such as... Figure 1 - Figure 6 as well as Figures 11-13 As shown:

[0056] The scraping mechanism 10 includes an air cylinder 101 fixed on the support frame 5, and an air inlet pipe 102 is connected to the upper side of the air cylinder 101. The air cylinder 101 is connected to the flow pipe 72 via the air inlet pipe 102. A one-way air inlet valve is provided between the air cylinder 101 and the air inlet pipe 102. When the flow pipe 72 performs periodic air jet dust suppression, some gas will be injected into the air cylinder 101 via the air inlet pipe 102. A movable block 103 is slidably installed on the upper part of the interior of the air cylinder 101, and the outer surface of the movable block 103 is in contact with the inner surface of the air cylinder 101. A spring 104 is fixedly installed below the movable block 103. The movable block 103 is a strong magnetic block. When the air cylinder 101 is filled with air, the air pressure will cause the movable block 103 to move downward to compress the spring 104.

[0057] A sliding ring 105 is slidably disposed on the outer surface of the air cylinder 101. The sliding ring 105 is a strong magnetic block, and the magnetism of the sliding ring 105 is different from that of the movable block 103, so that the sliding ring 105 and the movable block 103 have an adsorption effect. Therefore, when the movable block 103 is subjected to air pressure and moves downward, it can synchronously drive the sliding ring 105 to move. A scraper 106 is disposed on the outer side of the sliding ring 105, and the scraper 106 is in contact with the outer surface of the filter bag 4. A metal ring 107 is disposed inside the scraper 106. The metal ring 107 is attracted by the strong magnetic block sliding ring 105, so that... The scraper 106 is attached to the outer surface of the filter bag 4 and can move together with the sliding ring 105. The scraper 106 is made of soft rubber, which can prevent damage to the filter bag 4 when moving. A pressure relief valve 108 is installed on the upper rear side of the air cylinder 101. After the air cylinder 101 is inflated, for example, after being inflated twice, the controller controls the pressure relief valve 108 to open, so that the air cylinder 101 is released. After the air is released, the pressure in the air cylinder 101 gradually disappears. Using the rebound force of the spring 104, the movable block 103, the sliding ring 105 and the scraper 106 can move in the opposite direction.

[0058] By utilizing the inflation and deflation of the air cylinder 101, the scraper 106 reciprocates on the outer surface of the filter bag 4, enabling the scraping and dust removal of the filter bag 4. This, combined with the blowing of the jet cleaning mechanism 7 and the impact dust removal by the push plate 99, further improves the dust removal effect on the outer surface of the filter bag 4. It also helps to further reduce the blowing frequency of the jet cleaning mechanism 7 and reduce the energy consumption of the jet cleaning mechanism 7 when used alone. Furthermore, the scraping mechanism 10 achieves the scraping effect on the outer surface of the filter bag 4. When filtering moist and sticky coal dust, it helps to scrape the sticky dust off the filter bag 4, avoiding the problem that it is difficult to effectively remove dust when the coal dust is moist and sticky using the jet cleaning mechanism 7 and the push mechanism 9. This helps to improve the dust removal effect. At the same time, the scraper 106 on the outer surface of the filter bag 4 can play a role in binding and securing the filter bag 4, preventing the filter bag 4 from deforming and affecting the dust removal effect of the jet cleaning mechanism 7 and the push mechanism 9.

[0059] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0060] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal conveying dust suppression system, comprising a bag filter and an air inlet located on one side below the bag filter, wherein an air outlet is connected to the upper part of the other side of the bag filter, characterized in that: The bag filter is provided with several sets of filter bags on the upper inner side, and a support frame is installed inside the filter bags. An isolation top plate is installed on the top of the support frame. A jet cleaning mechanism is installed on the upper side of the bag filter, and a dust discharge port is provided in the lower middle part of the bag filter. The support frame has air guiding mechanisms installed on both sides of the lower interior, and a pushing mechanism installed at the bottom of the air guiding mechanism. The support frame has scraping mechanisms on both the front and rear sides, and the scraping mechanisms are connected to the blowing mechanism. Several sets of scraping mechanisms are arranged from top to bottom around the support frame. The jetting mechanism includes a jet pipe mounted on a support frame; The air guiding mechanism includes an air pipe fixed on a support frame, a variable diameter ring fixed in the middle of the inner side of the air pipe, a fixed end fixed at the top of the air pipe, and a movable plate 1 slidably installed in the middle of the inner side of the fixed end, with the outer wall of the movable plate 1 fitting against the inner wall of the fixed end. Spring 1 is fixedly connected to both sides of the bottom of the movable plate 1, and the bottom end of spring 1 is fixedly connected to the inner wall of the fixed end. An air outlet is opened in the middle of the outer surface of the fixed end, and the air outlet is arranged in a ring around the fixed end. A connecting rod is fixedly connected to the lower middle of the movable plate 1, and a contact seat is installed on the top of the fixed end. The pushing mechanism includes an air cylinder fixed on a support frame. An air vent is provided on one of the upper sides of the air cylinder, and a sealing plug is elastically installed in the upper center of the air vent. The sealing plug is elastically connected to the air cylinder by a spring. The upper side of the sealing plug is rotatably mounted on one end of a linkage rod, and the other end of the linkage rod is rotatably connected to a connecting rod. An air intake pipe is connected to one side of the air cylinder, and an air intake valve is installed at the top of the air intake pipe. The air intake pipe and the air intake valve are connected to the air jet pipe. A sliding rod is slidably installed in the middle of the inner side of the air cylinder, and a movable plate is fixed to one end of the sliding rod. The outer surface of the movable plate is in contact with the inner surface of the air cylinder. A spring is fixedly installed on one side of the movable plate, and the other side of the spring is fixedly connected to the inner wall of the air cylinder. A push plate is fixed to the other end of the sliding rod.

2. The coal conveying dust suppression system according to claim 1, characterized in that, The lower middle part of the jet pipe is connected to several sets of flow pipes, and the outer side of the middle part of the flow pipe is connected to an air distribution ring. A jet head is installed on the outside of the air distribution ring, and the jet head is arranged in a ring around the air distribution ring.

3. The coal conveying dust suppression system according to claim 1, characterized in that, The second movable plate includes a slot formed on the inner surface of the first air cylinder, and the outer surface of the slot is provided with a rounded chamfer. A locking head is provided on the upper part of the inside of the slot.

4. The coal conveying dust suppression system according to claim 3, characterized in that, The upper end of the locking head is fixed with a second spring, and the outside of the second spring is provided with a mounting groove. The upper end of the second spring is fixedly connected to the top of the mounting groove, and the locking head is elastically connected to the mounting groove through the second spring.

5. The coal conveying dust suppression system according to claim 2, characterized in that, The scraping mechanism includes an air cylinder two fixed on a support frame, and an air inlet pipe two connected to the upper side of the air cylinder two. The air cylinder two is connected to a flow pipe via the air inlet pipe two. A movable block is slidably installed inside the upper part of the air cylinder two, and the outer surface of the movable block is in contact with the inner surface of the air cylinder two. A spring four is fixedly installed below the movable block.

6. The coal conveying dust suppression system according to claim 5, characterized in that, A sliding ring is slidably provided on the outer surface of the second air cylinder, and a scraper is provided on the outer side of the sliding ring, and the scraper is in contact with the outer surface of the filter bag. A metal ring is provided inside the scraper, and a pressure relief valve is installed on the upper rear side of the second air cylinder.

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