Dust removal system and dust removal method for diversified composite regeneration all-in-one machine

Abstract

The dust removal system comprises a dust removal box, a dust collection box and a connecting box, the dust collection box is fixedly installed on the lower surface of the dust removal box, the dust removal box communicates with the dust collection box, the connecting box is fixedly installed on the upper surface of the dust removal box, an air inlet is formed in the side wall of the dust removal box, and an air outlet is formed in the side wall of the connecting box; the dust removal box is internally and fixedly provided with a pattern plate, the outer side of the cage framework is sleeved with a filter bag, the upper surface of an inner cavity of the dust removal box and the upper surface of the pattern plate are each provided with a buffer assembly, and the connecting box is provided with a reverse blowing assembly. The two ends of the filter bag can elastically displace in the axial direction during pulse dust removal, harmful impact kinetic energy is converted into heat energy to be dissipated through the corrugated pipe damping structure and the adjusting piece, the stress concentration phenomenon of the end of the filter bag is effectively eliminated, and early damage of the filter bag caused by mechanical fatigue is avoided.

Description

Technical Field

[0001] This invention belongs to the field of dust removal technology, and specifically provides a dust removal system and method for a diversified composite regeneration integrated machine. Background Technology

[0002] In the field of road construction and maintenance, asphalt pavement recycling technology has been widely used due to its environmental and economic advantages. The core equipment of this technology is a multi-functional composite recycling machine. During the production of asphalt mixtures, the old materials need to be heated, dried, and mixed. During this process, the old asphalt, fine aggregates, and moisture adhering to the surface of the recycled materials evaporate due to heat, generating a large amount of high-temperature, high-humidity, and somewhat sticky smoke and exhaust gas.

[0003] Currently, pulse-jet baghouse dust collectors are commonly used in the industry to purify this type of flue gas. However, traditional pulse-jet dust collectors have some drawbacks under these specific operating conditions. First, the strong pulse airflow causes the filter bag to expand instantaneously, resulting in a high concentration of stress at the fixed point at the top of the filter bag. This can easily lead to fatigue of the seams or damage to the filter bag material, significantly shortening the filter bag's service life. Second, the impact force of the pulse cleaning is attenuated as it is transmitted from the bag opening to the bottom, often resulting in incomplete cleaning of the lower half of the filter bag. After long-term operation, dust caking occurs, leading to persistently high system resistance. Furthermore, cleaning control strategies often rely on fixed time intervals or single differential pressure signals, which cannot accurately match dynamic operating conditions such as recycled material feeding and temperature changes, easily causing energy waste or insufficient cleaning. Therefore, diversified integrated composite recycling dust collection systems and methods are needed. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a dust removal system and method for a diversified composite regeneration integrated machine.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a dust removal system for a diversified composite regeneration integrated machine, comprising a dust removal box, a dust collection box, and a connecting box. The dust collection box is fixedly installed on the lower surface of the dust removal box and is connected to the dust collection box. The connecting box is fixedly installed on the upper surface of the dust removal box. An air inlet is provided on the side wall of the dust removal box, and an air outlet is provided on the side wall of the connecting box. A tube sheet is fixedly installed inside the dust removal box, and cages are uniformly fixedly installed between the upper surface of the inner cavity of the dust removal box and the tube sheet. Filter bags are sleeved on the outer side of the cages. Buffer components are assembled on both the upper surface of the inner cavity of the dust removal box and the upper surface of the tube sheet, and both ends of the filter bags are fixedly installed on the buffer components. A back-blowing component is assembled on the connecting box, and the output end of the back-blowing component matches the filter bag.

[0006] Furthermore, partitions are uniformly fixedly installed on the upper surface of the tube sheet, and multiple partitions divide the dust collection box into multiple dust collection zones, with the cages and filter bags evenly distributed within the dust collection zones.

[0007] Furthermore, the backflushing assembly includes a bracket, which is fixedly installed on the rear wall of the dust collector box. An air collection tank is provided on the upper surface of the bracket. Vertical pipes are uniformly fixedly installed on the upper side of the outer wall of the air collection tank. An air supply pipe is fixedly installed at the upper end of the vertical pipe, and a pulse valve is assembled between the vertical pipe and the air supply pipe. The air supply pipe is located inside the connecting box. A blowpipe is uniformly fixedly installed on the lower side of the outer wall of the air supply pipe. A blowpipe head is fixedly installed at the end of the blowpipe. An air outlet component penetrating the connecting box and the dust collector box shell is fixedly installed on the lower surface of the inner cavity of the connecting box. The air vents of the air outlet component correspond to the blowpipe head and the filter bag, respectively.

[0008] Furthermore, it also includes a gas processing assembly, which includes an air compressor and a gas transmission pipeline. The inlet end of the gas collection tank is equipped with a copper ball valve, and the air compressor is connected to the copper ball valve through the gas transmission pipeline. The gas transmission pipeline is sequentially equipped with a gas storage tank, a pressure reducing valve, and an air filter.

[0009] Furthermore, the buffer components at both ends of the filter bag are symmetrically arranged. The upper buffer component includes a fixed flange and a bellows damping structure. The fixed flange is fixedly installed on the upper surface of the inner cavity of the dust collector. An upper flange is fixedly installed on the lower surface of the fixed flange. A return spring is fixedly installed on the lower surface of the upper flange. A lower flange is fixedly installed at the lower end of the return spring. A filter bag flange is fixedly installed on the lower surface of the lower flange, and the end of the filter bag is fixedly installed on the filter bag flange. The upper flange, lower flange, and filter bag flange are all sleeved on the outside of the cage.

[0010] Furthermore, the bellows damping structure includes an inner bellows and an outer bellows, which are fixedly installed between the upper flange and the lower flange, with the outer bellows sleeved outside the inner bellows. The crests of the outer bellows correspond to the troughs of the inner bellows. The upper flange, the fixed flange, the dust collector housing, and the connecting housing are provided with communicating through holes, and adjusting components are installed in the through holes. The through hole of the upper buffer assembly communicates with the connecting housing.

[0011] Furthermore, airbags are uniformly fixedly installed on the lower surface of the flower plate, and the through holes of the buffer assembly on the lower side are connected to the airbags.

[0012] Furthermore, the adjusting component includes a cylindrical tube with threads on its outer surface and screwed into a through hole. A limit ring is fixedly installed on the inner wall of the cylindrical tube, and elastic metal sheets are uniformly fixedly installed on the inner wall of the cylindrical tube. Both the upper and lower ends of the elastic metal sheets are bent outwards. Multiple elastic metal sheets are spliced ​​together to form a tube with both the upper and lower ends being trumpet-shaped, and the diameter of the lower end of the tube is smaller than the inner diameter of the cylindrical tube.

[0013] The dust removal method for the multi-functional composite regeneration integrated machine, employing the aforementioned dust removal system, specifically includes the following steps: a. Dust removal stage: Dust-laden flue gas enters from the inlet of the dust collector and is filtered through the outer wall of the filter bag. The dust is trapped on the outer surface of the filter bag, and the purified gas enters the inside of the filter bag, flows upward through the connecting box, and is finally discharged from the outlet. b. Dust removal trigger judgment stage: Real-time monitoring of the pressure difference in the dust collector box. When the pressure difference rises to the preset value and continues for a certain period of time, it indicates that too much dust has accumulated on the surface of the filter bag and the system resistance has increased. The dust removal program is automatically triggered. At the same time, the cumulative running time and upstream production conditions are combined to make a comprehensive judgment and trigger the dust removal program. c. Dust removal area isolation and dust removal preparation stage: After the dust removal program is started, the dust removal area that needs to be cleaned is first determined. The corresponding inlet and outlet valves of the dust removal area are closed through the control system to put it in an "offline" state and isolate it from the main airflow. d. Pulse jet cleaning and buffer cleaning stage: The pulse valves in this dust removal zone open and close repeatedly according to the set program. When the pulse valves open, compressed air is injected vertically downwards into the filter bag from the air collection tank through the air supply pipe, the jet pipe and the jet head. The high-pressure airflow causes the air pressure inside the filter bag to rise sharply, and the filter bag expands and vibrates violently from the bag mouth to the bottom, shaking off the accumulated dust. At the same time, the axial tension generated by the expansion of the filter bag pulls the filter bag flanges on the upper and lower sides to move towards each other, lengthening the return spring and the bellows damping structure. Under the action of the regulating component, the external gas slowly flows into the bellows damping structure, generating a huge damping force, effectively absorbing the impact kinetic energy and protecting the filter bag ends from stress damage. When the pulse valve is closed, the reset spring, under the action of elastic force, drives the filter bag and the bellows damping structure to reset. The gas inside the bellows damping structure is quickly discharged under the action of the regulating element, thus completing the reset. The pulse valve repeatedly opens and closes, repeating the above process to cause the dust adhering to the surface of the filter bag to fall off; e. Dust settling stage: After the pulse jet cleaning ends, the dust removal area remains offline for 10-30 seconds to allow the shaken dust to settle fully into the dust collection box under gravity. f. Cyclic operation and dust collection and emission stage: Open the valve of the dust removal zone to put it back into dust removal work. The system repeats steps c, d, and e in sequence for the next dust removal zone until all filter bags are cleaned. Periodically or according to the level gauge signal, open the ash discharge valve at the bottom of the dust collection box to discharge the collected dust.

[0014] The beneficial effects of using this invention are: This invention features symmetrical buffer components at both ends of the filter bag. When the intense impact of pulse cleaning occurs, the two ends of the filter bag can undergo elastic displacement along the axial direction. Through the corrugated damping structure and adjusting components, the harmful impact kinetic energy is converted into heat energy and dissipated, effectively eliminating stress concentration at the ends of the filter bag and preventing premature damage caused by mechanical fatigue. This extends the service life of the filter bag under harsh working conditions and significantly reduces equipment downtime and filter bag replacement maintenance costs.

[0015] This invention employs a compartmentalized isolation design, allowing dust removal to be carried out offline in an independent dust removal area, avoiding the problem of secondary dust adsorption during dust removal. At the same time, the pulse-jet system and the buffer mechanism work together to enable the filter bags to expand and vibrate more fully and evenly, ensuring continuous and efficient dust removal performance.

[0016] The dust removal triggering mode of this invention adopts a comprehensive judgment strategy based on differential pressure, cumulative running time, and interlocking of upstream production conditions. The system can sense changes in production load, automatically delay the dust removal cycle during low-load periods, and force thorough dust removal before the end of production. This effectively avoids malfunctions and energy waste caused by instantaneous parameter fluctuations or changes in operating conditions, ensuring that the dust removal action always occurs at the most necessary moment. This not only ensures that the system resistance is within the optimal range but also saves compressed air consumption, achieving the dual goals of energy saving, consumption reduction, and stable operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall dust removal system of the present invention.

[0018] Figure 2 This is a front view of the dust removal system of the present invention.

[0019] Figure 3 This is a top view of the dust collection box of the present invention.

[0020] Figure 4 This is a left view of the dust removal system of the present invention.

[0021] Figure 5 This is a three-dimensional schematic diagram of the backflush assembly of the present invention.

[0022] Figure 6 This is a schematic diagram of the gas processing assembly of the present invention.

[0023] Figure 7 For the present invention Figure 4 A magnified view of part a in the middle.

[0024] Figure 8 This is a three-dimensional partial sectional view of the adjusting component of the present invention.

[0025] Figure 9 This is a schematic diagram of the blower head according to Embodiment 3 of the present invention.

[0026] The attached reference numerals include: 1. Dust collector box; 11. Air inlet; 12. Partition; 2. Dust collection box; 3. Connecting box; 31. Air outlet; 4. Cage; 5. Filter bag; 6. Backflush assembly; 61. Support; 62. Air collection tank; 63. Pulse valve; 64. Air supply pipe; 65. Blowpipe; 66. Blowhead; 661. Connecting pipe; 662. Second blowhead; 67. Copper ball valve; 7. Buffer assembly; 71. Fixed flange; 72. Upper flange; 73. Return spring; 74. Lower flange; 75. Filter bag flange; 76. Inner bellows; 77. Outer bellows; 78. Adjusting component; 781. Cylindrical cylinder; 782. Limiting ring; 783. Elastic metal sheet; 79. Airbag; 8. Air outlet; 9. Gas treatment assembly; 91. Air compressor; 92. Air storage tank; 93. Pressure reducing valve; 94. Air filter. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] Reference Figures 1 to 9 The dust removal system for the multi-functional composite regeneration integrated machine includes a dust collection box 1, a dust collection box 2, and a connecting box 3. The dust collection box 2 is fixedly installed on the lower surface of the dust collection box 1, and the dust collection box 1 and the dust collection box 2 are connected. The connecting box 3 is fixedly installed on the upper surface of the dust collection box 1. The side wall of the dust collection box 1 is provided with an air inlet 11, and the side wall of the connecting box 3 is provided with an air outlet 31. A tube sheet is fixedly installed inside the dust collection box 1, and cages 4 are evenly fixedly installed between the upper surface of the inner cavity of the dust collection box 1 and the tube sheet. Filter bags 5 are sleeved on the outside of the cages 4. Buffer components 7 are installed on both the upper surface of the inner cavity of the dust collection box 1 and the upper surface of the tube sheet, and both ends of the filter bags 5 are fixedly installed on the buffer components 7. A back-blowing component 6 is installed on the connecting box 3, and the output end of the back-blowing component 6 is matched with the filter bags 5.

[0030] Dust collection box 1, dust collection box 2 and connecting box 3 are connected by bolts, with a high-temperature resistant graphite sealing gasket sandwiched in the middle to ensure overall airtightness. The air inlet 11 is connected to the dust-laden flue gas duct, and the air outlet 31 is connected to the flue gas duct of the subsequent purification equipment through a cloth belt.

[0031] Dust-laden flue gas enters the dust collection box 1 through the air inlet 11, passes through the filter bag 5 for filtration, and then flows upward into the connecting box 3, and finally exits from the air outlet 31. During back-blowing cleaning, the back-blowing component 6 sprays pulse airflow into the filter bag 5, and the attached dust is shaken off into the dust collection box 2. The dust can be discharged by periodically opening the valve at the bottom of the dust collection box 2.

[0032] Backflushing cleaning mainly relies on the rapid expansion and vibration of the filter bag 5. Therefore, buffer components 7 are set at both ends of the filter bag 5 to buffer and protect the connection, avoid damage, and significantly improve the service life of the filter bag.

[0033] The surface of the ceiling is perforated, allowing dust to pass through and fall into the dust collection box 2.

[0034] Specifically, such as Figure 3 As shown, partitions 12 are evenly fixedly installed on the upper surface of the tube sheet. Multiple partitions 12 divide the dust collection box 1 into multiple dust collection zones. The cages 4 and filter bags 5 are evenly distributed in the dust collection zones.

[0035] The compartmentalized design of this dust removal zone not only facilitates uniform airflow distribution, but its core function is to enable offline dust removal. When a dust removal zone needs to be backflushed for cleaning, its inlet and outlet valves can be closed individually (not shown in the figure, which is a conventional design) to isolate it from the system. This effectively prevents the dust raised during cleaning from being re-adsorbed by the adjacent working filter bag 5, thereby greatly improving the cleaning efficiency and allowing online equipment maintenance without affecting the operation of the whole machine.

[0036] Specifically, such as Figure 4 and Figure 5 As shown, the back-flushing assembly 6 includes a bracket 61, which is fixedly installed on the rear wall of the dust collector 1. An air collection tank 62 is provided on the upper surface of the bracket 61. Vertical pipes are uniformly fixedly installed on the upper side of the outer wall of the air collection tank 62. An air supply pipe 64 is fixedly installed at the upper end of the vertical pipe. A pulse valve 63 is assembled between the vertical pipe and the air supply pipe 64. The air supply pipe 64 is located in the connecting box 3. A blowpipe 65 is uniformly fixedly installed on the lower side of the outer wall of the air supply pipe 64. A blowpipe head 66 is fixedly installed at the end of the blowpipe 65. An air outlet 8 is fixedly installed on the lower surface of the inner cavity of the connecting box 3, penetrating the connecting box 3 and the dust collector 1 shell. The air outlet 8 has vents that correspond to the blowpipe head 66 and the filter bag 5, respectively.

[0037] The flow of gas from the gas collection tank 62 to the gas delivery pipe 64 is controlled by the pulse valve 63. During backflushing, the pulse valve 63 is opened according to the set program to perform jetting. Compressed gas passes through each pulse valve 63 in sequence in a very short time and enters the filter bag 5 through the jet nozzle 66 on the jet pipe 65. This causes the air pressure inside the filter bag 5 to increase rapidly and instantaneously, forming an air wave. This causes the filter bag 5 to expand rapidly and vibrate from the bag opening to the bottom, removing the dust accumulated on the outer surface of the filter bag 5.

[0038] There is a gap between the blow nozzle 66 and the vent hole of the air outlet, allowing the filtered gas to flow into the connecting box 3.

[0039] Specifically, such as Figure 6 As shown, it also includes a gas processing component 9, which includes an air compressor 91 and a gas transmission pipeline. The air inlet end of the gas collection tank 62 is equipped with a copper ball valve 67, and the air compressor 91 is connected to the copper ball valve 67 through the gas transmission pipeline. The gas transmission pipeline is sequentially equipped with an air storage tank 92, a pressure reducing valve 93, and an air filter 94.

[0040] A clean, dry, and stable air source is key to effective pulse cleaning without damaging the filter bags. The air filter 94 prevents oil from contaminating the filter bags and reducing dust removal efficiency. The pressure reducing valve 93 ensures that the pulse pressure is within the optimal range, avoiding excessive pressure that could impact the filter bags or insufficient pressure that would hinder cleaning.

[0041] Specifically, such as Figure 7 As shown, the buffer components 7 at both ends of the filter bag 5 are symmetrically arranged. The upper buffer component 7 includes a fixed flange 71 and a bellows damping structure. The fixed flange 71 is fixedly installed on the upper surface of the inner cavity of the dust collector 1. An upper flange 72 is fixedly installed on the lower surface of the fixed flange 71. A return spring 73 is fixedly installed on the lower surface of the upper flange 72. A lower flange 74 is fixedly installed at the lower end of the return spring 73. A filter bag flange 75 is fixedly installed on the lower surface of the lower flange 74. The end of the filter bag 5 is fixedly installed on the filter bag flange 75. The upper flange 72, the lower flange 74 and the filter bag flange 75 are all sleeved on the outside of the cage 4.

[0042] During backflushing, the filter bag 5 expands, generating a huge axial force. Return springs 73 and bellows damping structures are installed at both ends of the filter bag 5, allowing the ends to be movably installed. When the filter bag 5 expands, its ends move inwards, achieving a buffering effect, reducing the force on the ends of the filter bag 5, and preventing damage due to excessive force. Simultaneously, during periods when backflushing stops, the elastic force of the return springs 73 will reset the filter bag 5, allowing it to continue effectively performing filtration during dust removal.

[0043] Specifically, such as Figure 7 As shown, the bellows damping structure includes an inner bellows 76 and an outer bellows 77. The inner bellows 76 and the outer bellows 77 are fixedly installed between the upper flange 72 and the lower flange 74, and the outer bellows 77 is sleeved on the outside of the inner bellows 76. The crest of the outer bellows 77 corresponds to the trough of the inner bellows 76. The upper flange 72, the fixed flange 71, the dust collector 1 housing and the connecting box 3 housing are provided with through holes, and the through holes are equipped with adjusting parts 78. The through hole of the upper buffer assembly 7 is connected to the connecting box 3. Airbags 79 are uniformly fixedly installed on the lower surface of the tube sheet, and the through hole of the lower buffer assembly 7 is connected to the airbags 79.

[0044] The corrugated pipe damping structure is designed so that both ends of the filter bag 5 are connected to the fixed flange 71 through corrugated pipes, which can effectively ensure the sealing performance. At the same time, the corrugated pipe can expand and contract, providing a buffer force during backflushing.

[0045] When the bellows damping structure buffers, external air enters between the two bellows through the through hole. The upper buffer component 7 uses the air in the connecting box 3, and the lower buffer component 7 uses the air in the airbag 79 to avoid contact with dust-laden flue gas. At the same time, the gas flow is achieved through the through hole with a smaller diameter, which further plays a damping role and can convert part of the pressure on the end of the filter bag 5 into heat energy, thereby protecting the end of the filter bag 5.

[0046] The design of the crest and trough positions of the inner corrugated pipe 76 and the outer corrugated pipe 77 can increase the space between them, increase the amount of gas that needs to flow in or out through the through holes to move the end of the filter bag 5, and enhance the damping effect.

[0047] Specifically, such as Figure 8 As shown, the adjusting component 78 includes a cylindrical tube 781. The outer surface of the cylindrical tube 781 is threaded and screwed into the through hole. A limit ring 782 is fixedly installed on the inner wall of the cylindrical tube 781. Elastic metal sheets 783 are uniformly fixedly installed on the inner wall of the cylindrical tube 781. Both the upper and lower ends of the elastic metal sheets 783 are bent outward. Multiple elastic metal sheets 783 are spliced ​​together to form a tube with both the upper and lower ends being trumpet-shaped. The diameter of the lower end of the tube is smaller than the inner diameter of the cylindrical tube 781.

[0048] The large opening of the trumpet-shaped tube structure faces the corrugated damping structure, while the small opening is away from the corrugated damping structure. Therefore, when the filter bag 5 expands, the end moves towards the middle, the corrugated tube elongates, and external gas flows in through the small opening. Under the action of airflow, the elastic metal sheets 783 tend to converge and mutually restrict each other, narrowing the channel and slowing the gas flow rate. This results in a large overall damping force and efficient energy consumption, allowing the corrugated damping structure to continuously provide damping effect after the filter bag 5 has initially expanded, thus providing better buffer protection for the movement and end of the filter bag 5. During the intermittent pulse gas flow, the return spring 73 pulls the end of the filter bag 5 to reset, and at the same time, the bellows damping structure resets to discharge the internal gas. At this time, the elastic metal sheets 783 are no longer constrained and can bend along their shape, making the channel wider, the gas flow rate faster, and the reset resistance smaller, so that the reset work can be completed quickly and smoothly, allowing the filter bag 5 to reset rapidly and prepare for the next pulse air wave.

[0049] Example 2

[0050] The dust removal method for the multi-functional composite regeneration integrated machine, employing the dust removal system for the multi-functional composite regeneration integrated machine as shown in Example 1, specifically includes the following steps: a. Dust removal stage: Dust-laden flue gas enters from the inlet 11 of the dust removal box 1, is filtered through the outer wall of the filter bag 5, and the dust is trapped on the outer surface of the filter bag 5. The purified gas enters the interior of the filter bag 5, flows upward through the connecting box 3, and is finally discharged from the outlet 31. During this stage, each dust removal zone operates continuously.

[0051] b. Dust removal trigger judgment stage: Real-time monitoring of the pressure difference in the dust collector 1. When the pressure difference rises to the preset value and continues for a certain period of time, it indicates that too much dust has accumulated on the surface of the filter bag 5, the system resistance has increased, and the dust removal program is automatically triggered. At the same time, combined with the cumulative running time and upstream production conditions, a comprehensive judgment is made and the dust removal program is triggered.

[0052] For the dust removal triggering stage, there are three core judgment conditions: dust collector differential pressure, cumulative operating time, and upstream production condition interlocking. Among them, the dust collector differential pressure condition is the priority triggering condition, while the cumulative operating time and upstream production condition interlocking are supplementary dust removal conditions. For the differential pressure conditions of the dust collector, pressure measuring devices are installed at the air inlet 11 and the air outlet 31, respectively, or pressure measuring devices are installed at the outlet and outside of the filter bag 5. The differential pressure data reflects the amount of dust adhering to the filter bag 5. An upper limit value for the cleaning differential pressure is set. When the system differential pressure reaches or exceeds this upper limit value, it indicates that the filter bag resistance has significantly affected the normal operation of the system, and the cleaning procedure needs to be started. At the same time, in order to avoid false triggering caused by instantaneous fluctuations in differential pressure, the system can be set to require the differential pressure to continuously exceed the upper limit value for 5-10 seconds before confirming the triggering of cleaning, which increases the stability of the judgment.

[0053] For the cumulative running time condition, the continuous running time of the dust removal system since the last dust cleaning cycle is recorded, and a maximum allowable running time is set. Even if the differential pressure has not reached the upper limit, the system will automatically start the dust cleaning program if the running time has expired. This condition serves as an important backup for differential pressure judgment and is mainly used to deal with the following situations: 1. Changes in dust characteristics: When dealing with dust with extremely fine particle size or low viscosity, the differential pressure increases slowly, but the dust may have penetrated deep into the filter bag, requiring regular cleaning to prevent caking; 2. Sensor failure: When the differential pressure sensor fails, the time condition can ensure that the system will not run indefinitely and cause filter bag blockage.

[0054] For upstream production operation interlock conditions, interlock signals with upstream production equipment are introduced to monitor their operation / standby status or feed rate signals. The main optimization logic is as follows: 1. Low load delay: When the upstream equipment is in a low load or standby state and the dust concentration in the flue gas is low, the system can automatically and appropriately increase the upper limit of the differential pressure or extend the maximum running time, reducing unnecessary dust cleaning times, saving compressed air energy consumption, and reducing wear on filter bag 5; 2. Forced dust cleaning before the end of production: When the upstream equipment is about to stop, regardless of whether the current differential pressure or running time has reached the threshold, the system automatically performs a complete dust cleaning cycle to ensure that filter bag 5 remains clean during the shutdown period, preventing dust in the humid flue gas from caking on the filter bag and creating good conditions for the next start-up.

[0055] c. Dust removal area isolation and cleaning preparation stage: After the cleaning program is started, the dust removal area that needs to be cleaned is first determined. The corresponding inlet and outlet valves of the dust removal area are closed through the control system to put it in an "offline" state and isolate it from the main airflow. This can prevent the dust shaken off during the cleaning process from being re-adsorbed by adjacent filter bags.

[0056] d. Pulse jet cleaning and buffer cleaning stage: The pulse valve 63 in this dust removal zone opens and closes repeatedly according to the set program. When the pulse valve 63 is open, compressed air is injected vertically downward into the filter bag 5 through the air outlet 8 after passing through the air supply pipe 64, the jet pipe 65 and the jet head 66 from the air collection tank 62. The high-pressure airflow causes the air pressure inside the filter bag 5 to rise sharply. The filter bag 5 expands violently from the bag mouth to the bottom and vibrates violently, shaking off the accumulated dust. At the same time, the axial tension generated by the expansion of the filter bag 5 pulls the filter bag flanges 75 on the upper and lower sides to move towards each other, lengthening the return spring 73 and the bellows damping structure. Under the action of the adjusting component 78, the external gas slowly flows into the bellows damping structure, generating a huge damping force, effectively absorbing the impact kinetic energy and protecting the end of the filter bag 5 from stress damage. When the pulse valve 63 is closed, the reset spring 73 drives the filter bag 5 and the bellows damping structure to reset under the action of the elastic force. The gas inside the bellows damping structure is quickly discharged under the action of the regulating element 78, thus completing the reset. The pulse valve 63 repeatedly opens and closes, repeating the above process to cause the dust adhering to the surface of the filter bag 5 to fall off.

[0057] e. Dust settling stage: After the pulse jet cleaning ends, the dust removal area remains offline for 10-30 seconds, allowing the shaken dust to settle fully into the dust collection box 2 under gravity.

[0058] f. Cyclic operation and dust collection and emission stage: Open the valve of the dust removal area to put it back into dust removal work. The system repeats steps c, d, and e in sequence for the next dust removal area until all filter bags 5 are cleaned. Periodically or according to the level gauge signal, open the ash discharge valve at the bottom of the dust collection box 2 to discharge the collected dust.

[0059] The level gauge is installed inside the dust collection box 2.

[0060] Example 3

[0061] The difference from Example 1 is that: A connecting pipe 661 is provided at the lower end of the blow pipe 65 and the blow head 66, and a second blow head 662 is provided at the lower end of the connecting pipe 661. The second blow head 662 is located on the lower side inside the cage 4.

[0062] In Example 1, the pulsed gas enters from the top of the filter bag 5, which has a better impact expansion effect on the upper side of the filter bag 5, but a weaker impact cleaning effect on the lower side of the filter bag 5. Therefore, a second jet nozzle 662 is designed, and a control valve needs to be installed in both the jet nozzle 66 and the second jet nozzle 662.

[0063] During the backflushing operation, the blow nozzle 66 and the second blow nozzle 662 alternately spray air, with the main impact force acting on the upper and lower halves of the filter bag 5 respectively. This can significantly improve the uniformity of the dust removal force distribution along the length of the filter bag, ensuring that the entire length of the filter bag can be effectively cleaned. It is especially suitable for ultra-long filter bags or for handling dust that is prone to caking, thereby further improving the overall dust removal efficiency.

[0064] The above content is only a preferred embodiment of the present invention. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of the present invention. As long as these changes do not depart from the concept of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A dust removal system for a diversified composite regenerative all-in-one machine, characterized in that: Including dust removal box (1), dust collection box (2) and connecting box (3), the dust collection box (2) is fixedly installed on the lower surface of dust removal box (1), and the dust removal box (1) is communicated with the dust collection box (2), the connecting box (3) is fixedly installed on the upper surface of dust removal box (1), the sidewall of dust removal box (1) is provided with air inlet (11), the sidewall of connecting box (3) is provided with air outlet (31), the inside of dust removal box (1) is fixedly installed with flower board, and the upper surface of the inner cavity of dust removal box (1) and the flower board are uniformly fixedly installed with cage bone (4), the outer side of cage bone (4) is sleeved with filter bag (5), the upper surface of the inner cavity of dust removal box (1) and the upper surface of flower board are equipped with buffer assembly (7), and the both ends of filter bag (5) are fixedly installed on buffer assembly (7), the connecting box (3) is equipped with back flushing assembly (6), and the output end of back flushing assembly (6) is matched with filter bag (5).

2. The dust removal system for the diversified composite regenerative all-in-one machine according to claim 1, characterized in that: The upper surface of the flower board is uniformly fixedly installed with the baffle (12), and a plurality of baffle (12) divides the dust removal box (1) into a plurality of dust removal zones, and the cage bone (4) and filter bag (5) are uniformly distributed in the dust removal zone.

3. The dust removal system for the diversified composite regenerative all-in-one machine according to claim 1, characterized in that: The back flushing assembly (6) includes a bracket (61), the bracket (61) is fixedly installed on the back wall of the dust removal box (1), the upper surface of the bracket (61) is provided with a gas collecting tank (62), the outer wall of the gas collecting tank (62) is uniformly fixedly installed with a vertical pipe, the upper end of the vertical pipe is fixedly installed with a gas supply pipe (64), and the vertical pipe and the gas supply pipe (64) are assembled with a pulse valve (63), the gas supply pipe (64) is arranged in the connecting box (3), the outer wall of the gas supply pipe (64) is uniformly fixedly installed with a blowing pipe (65), the end of the blowing pipe (65) is fixedly installed with a blowing head (66), the lower surface of the inner cavity of the connecting box (3) is fixedly installed with an air outlet (8) penetrating through the connecting box (3) and the shell of the dust removal box (1), and the air holes of the air outlet (8) correspond to the blowing head (66) and the filter bag (5) respectively.

4. The dust removal system for the multi-functional composite regenerative all-in-one machine according to claim 3, characterized in that: It also includes a gas treatment assembly (9), the gas treatment assembly (9) includes an air compressor (91) and a gas pipeline, the gas inlet end of the gas collecting tank (62) is assembled with a copper ball valve (67), and the air compressor (91) is connected with the copper ball valve (67) through the gas pipeline, and the gas pipeline is sequentially assembled with a gas storage tank (92), a pressure reducing valve (93) and an air filter (94).

5. The dust removal system for the diversified composite regenerative all-in-one machine according to claim 1, characterized in that: The buffer assembly (7) at both ends of the filter bag (5) is symmetrically arranged, and the upper buffer assembly (7) comprises a fixed flange (71) and a bellows damping structure. The fixed flange (71) is fixedly installed on the upper surface of the inner cavity of the dust removal box (1). The lower surface of the fixed flange (71) is fixedly installed with an upper flange (72). The lower surface of the upper flange (72) is fixedly installed with a return spring (73). The lower end of the return spring (73) is fixedly installed with a lower flange (74). The lower surface of the lower flange (74) is fixedly installed with a filter bag flange (75). The end of the filter bag (5) is fixedly installed on the filter bag flange (75). The upper flange (72), the lower flange (74) and the filter bag flange (75) are all sleeved outside the cage bone (4).

6. The dust removal system for the diversified composite regenerative all-in-one machine according to claim 5, characterized in that: The bellows damping structure comprises an inner bellows (76) and an outer bellows (77). The inner bellows (76) and the outer bellows (77) are fixedly installed between the upper flange (72) and the lower flange (74). The outer bellows (77) is sleeved outside the inner bellows (76). The wave crest of the outer bellows (77) corresponds to the wave trough position of the inner bellows (76). The upper flange (72), the fixed flange (71), the dust removal box (1) shell and the connecting box (3) shell are provided with through holes in communication. The through holes are fitted with adjusting pieces (78). The through hole of the upper buffer assembly (7) is in communication with the connecting box (3).

7. The dust removal system for the multi-functional composite regenerative all-in-one machine according to claim 6, characterized in that: The lower surface of the flower plate is uniformly fixedly installed with air bags (79). The through hole of the lower buffer assembly (7) is in communication with the air bags (79).

8. The dust removal system for the diversified composite regenerative all-in-one machine according to claim 6, characterized in that: The adjusting piece (78) comprises a cylindrical barrel (781). The outer surface of the cylindrical barrel (781) is provided with threads. The cylindrical barrel (781) is screwed into the through hole. The inner wall of the cylindrical barrel (781) is fixedly installed with a limiting ring (782). The inner wall of the cylindrical barrel (781) is uniformly fixedly installed with elastic metal sheets (783). The upper and lower ends of the elastic metal sheets (783) are outwardly bent. A plurality of elastic metal sheets (783) are combined to form a pipe body with horn shapes at the upper and lower ends. The diameter of the lower end of the pipe body is smaller than the inner diameter of the cylindrical barrel (781).

9. A dust removal method for a multi-functional composite regenerating all-in-one machine, which adopts the dust removal system for a multi-functional composite regenerating all-in-one machine according to any one of claims 1 to 8, and specifically comprises the following steps: a. Dust removal stage: dust-containing flue gas enters from the gas inlet (11) of the dust removal box (1), is filtered through the outer wall of the filter bag (5), dust is intercepted on the outer surface of the filter bag (5), and the purified gas enters the inside of the filter bag (5), flows upward through the connecting box (3), and is finally discharged from the gas outlet (31); b. Ash cleaning trigger judgment stage: the pressure difference in the dust removal box (1) is monitored in real time. When the pressure difference rises to a preset value and lasts for a certain time, it indicates that the dust on the outer surface of the filter bag (5) is too much, the system resistance increases, and the ash cleaning program is automatically triggered. At the same time, combined with the cumulative running time and the upstream production working condition interlocking, the ash cleaning program is comprehensively judged and triggered. c. Dusting area isolation and dust cleaning preparation stage: after the dust cleaning program is started, the dusting area to be cleaned is first determined, and the inlet and outlet valves corresponding to the dusting area are closed by the control system to make it "offline" and isolated from the main airflow; d. Pulse injection and buffer dust cleaning stage: the pulse valve (63) of the dusting area is repeatedly opened according to the set program. When the pulse valve (63) is opened, compressed air flows from the gas collection tank (62) through the air supply pipe (64), the injection pipe (65) and the injection head (66), and then vertically downward into the inside of the filter bag (5) through the air outlet (8). The high-pressure airflow causes the air pressure inside the filter bag (5) to rise sharply, and the filter bag (5) produces violent expansion and impact vibration from the bag opening to the bottom, which shakes off the accumulated dust. At the same time, the axial tension generated by the expansion of the filter bag (5) pulls the filter bag flanges (75) on the upper and lower sides to move towards each other, lengthening the reset spring (73) and the corrugated pipe damping structure. The external gas slowly flows into the corrugated pipe damping structure under the action of the adjusting piece (78), generating a large damping force that effectively absorbs the impact kinetic energy and protects the end of the filter bag (5) from stress damage. When the pulse valve (63) is closed, the reset spring (73) drives the filter bag (5) and the corrugated pipe damping structure to reset under the action of the spring force. The gas inside the corrugated pipe damping structure is quickly discharged under the action of the adjusting piece (78), completing the reset. The pulse valve (63) is repeatedly opened and closed, and the above process is repeated to make the dust on the surface of the filter bag (5) fall off. e. Dust settling stage: after the pulse injection is completed, the dusting area remains offline for 10-30 seconds to allow the shaken dust to fully settle under the action of gravity into the dust collection tank (2); f. Cycle operation and dust collection discharge stage: open the valve of the dusting area to put it back into the dust removal work. The system repeats steps c, d and e in sequence for the next dusting area until all filter bags (5) are cleaned. Periodically or according to the signal of the material level meter, open the dust unloading valve at the bottom of the dust collection tank (2) to discharge the collected dust.

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