A dynamic back-flushing bag filter dust collector based on dust sensing

Abstract

This invention relates to the field of baghouse dust collector technology, and more particularly to a dynamic back-flushing baghouse dust collector based on dust sensing. It includes a dust collection box containing filter bags. Two clean air chambers for discharging the collected gas are fixedly connected to the dust collection box. A partition is fixedly connected inside the dust collection box, dividing the filter bags into two groups to separate the interior of the dust collection box into two dust collection spaces, which are connected at their lower sides. Two dust hoppers are fixedly connected to the dust collection box, and inlet pipes are fixedly connected to the dust hoppers. Each inlet pipe connects to a separate dust-laden space requiring dust removal. A sealing plate is rotatably connected to the dust collection box to seal the corresponding dust collection space for easy cleaning and maintenance. This equipment uses a dust concentration sensor to detect the dust concentration in real time. The DCS system dynamically adjusts the blowing parameters based on the detection data, improving the cleaning effect on the filter bag surface, avoiding over-blowing, and reducing unnecessary energy consumption.

Description

Technical Field

[0001] This invention relates to the field of bag filter dust collection equipment technology, and in particular to a dynamic backflushing bag filter dust collection equipment based on dust sensing. Background Technology

[0002] Baghouse dust collectors are a common type of dust removal equipment in industry. They can not only separate solids contained in gas through filter bags, but also clean the filter bags by pulse backflushing through blowpipes.

[0003] Among them, the offline pulse bag dust collector, by setting up multiple independent dust collection chambers and cooperating with independently controllable valves, achieves chamber-by-chamber offline operation during dust removal, while the remaining chambers remain online, thus ensuring the continuity of overall dust removal to a certain extent.

[0004] However, offline pulse jet baghouse dust collectors rely on the main airflow duct to distribute dust-laden airflow to each independent dust collection chamber. When the main airflow duct malfunctions or needs maintenance, the entire dust collection system must be shut down. After shutdown, not only can all connected dust-laden spaces no longer be cleaned, but in some high-risk, high-requirement working environments, such as the operation of blast furnaces and converters in the steel and metallurgical industry, and the handling of toxic and harmful dust in chemical production, the shutdown of the dust collection system will result in a large amount of dust-laden waste gas being directly emitted without treatment. This will not only cause environmental pollution, but the dust accumulation caused by the shutdown of the dust collection system may also lead to equipment blockage, or even safety accidents such as fires or explosions. Therefore, it is necessary to provide a more reliable baghouse dust collector while ensuring offline cleaning function and continuous dust collection, thereby enhancing the stability and safety of the equipment. Summary of the Invention

[0005] To overcome the shortcomings of existing offline pulse bag dust collectors, where the entire dust collection system needs to be shut down when the main pipeline fails, resulting in the inability to continue dust collection in all connected dust-laden spaces and the potential for untreated exhaust gas to be directly discharged and cause safety accidents in high-risk, high-requirement working environments, this invention provides a dynamic back-flushing bag dust collector based on dust sensing. This device uses a partition to divide the dust collection box into two interconnected dust collection spaces, each corresponding to a specific dust-laden space requiring dust collection. This avoids the drawbacks of relying on the main pipeline for unified distribution of dust-laden airflow. Furthermore, when one dust collection space requires cleaning or maintenance, the corresponding sealing plate can be closed while the other dust collection space continues to operate, preserving the offline cleaning function and ensuring continuous dust collection operation.

[0006] The technical solution of this invention is: a dynamic back-flushing bag filter dust collector based on dust sensing, comprising a dust collection box, filter bags installed inside the dust collection box, two clean air boxes for discharging the dust-collected gas fixedly connected to the dust collection box, a partition fixedly connected inside the dust collection box, the filter bags inside the dust collection box being divided into two groups by the partition to divide the interior of the dust collection box into two dust collection spaces, and the two dust collection spaces being connected at their lower sides, two ash hoppers fixedly connected to the dust collection box, and air inlet pipes fixedly connected to the ash hoppers, each air inlet pipe being individually connected to a dust-containing space that needs to be dusted, a sealing plate rotatably connected to the dust collection box, the sealing plate being used to seal the corresponding dust collection space for easy cleaning and maintenance, and a dynamic back-flushing mechanism installed on the dust collection box, the dynamic back-flushing mechanism being able to control the pressure and flow rate of the jet according to the dust concentration in the dust collection space.

[0007] Furthermore, the dynamic backflushing mechanism includes an air tank, which is fixedly installed on the clean air box. An electric valve is fixedly installed at the air outlet of the air tank. The air outlet of the electric valve is connected to a main air pipe. Multiple pulse valves are fixedly connected to the main air pipe. A jetting pipeline for cleaning the filter bags is installed on the pulse valve. Multiple nozzles are fixedly connected to the jetting pipeline. An air outlet pipe is connected to the clean air box. A dust concentration sensor is fixedly installed on the partition. The dust concentration sensor is used to detect the dust concentration in the dust removal space so as to adjust the opening of the electric valve according to the detection data.

[0008] Furthermore, it also includes a locking mechanism for controlling the rotation of the sealing plate. The locking mechanism includes a drive shaft rotatably connected inside the dust collector. A main gear is fixedly connected to the drive shaft. A secondary gear that meshes with the main gear is rotatably connected to the rotating shaft of the sealing plate. A torsion spring connects the secondary gear and the sealing plate. A positioning groove is provided on the sealing plate. A positioning frame is slidably connected inside the dust collector. A positioning rod that meshes with the positioning groove to limit the rotation of the sealing plate is fixedly connected to the positioning frame. A No. 1 spring is sleeved on the guide rod of the positioning frame. A cam is rotatably connected to the drive shaft. The cam is used to drive the positioning rod out of the positioning groove through a squeezing action.

[0009] Furthermore, it also includes a shielding mechanism to prevent blockage of the spray pipe. The shielding mechanism includes a dust shield frame, which is fixedly connected inside the clean air box. A dust shield plate is rotatably connected to the dust shield frame. The dust shield plate is used to shield the air outlet of the nozzle in the spray pipe. A triggering rod is slidably connected to the partition plate through a dust shielding guide rod. A slide rail is opened on the triggering rod. A sliding rod is fixedly connected to the rotating shaft end of the dust shield plate, and the sliding rod is slidably set in the slide rail. During the rotation of the sealing plate, it can push the triggering rod to move, so as to drive the dust shield plate to rotate through the triggering rod. A No. 3 spring is sleeved on the dust shielding guide rod to push the triggering rod to reset.

[0010] Furthermore, it also includes a cleaning mechanism for removing adhesive dust. The cleaning mechanism includes a dust removal guide rod, which is fixed inside the dust collector. A scraper is slidably connected to the dust removal guide rod. The scraper is equipped with multiple circular scrapers, which are fitted onto the surface of the filter bag. A second spring is fitted on the dust removal guide rod to push the scraper back to its original position. A winding wheel is fixed to the drive shaft, and a pull rope is connected between the winding wheel and the scraper.

[0011] Furthermore, it also includes a self-cleaning structure to prevent the cleaned dust from being re-adsorbed. The self-cleaning mechanism includes a cleaning frame, which is fixed to the dust collection box. An air extraction pipe is slidably connected to the cleaning frame via a slide block. The air extraction pipe is connected to an external vacuuming device. A cleaning cylinder is fixedly connected to the air extraction pipe. The cleaning cylinder is located inside the dust collection box and has a through hole for vacuuming.

[0012] Furthermore, the self-cleaning mechanism also includes a sealing frame, which is slidably connected to the cleaning cylinder. The sealing frame is used to seal the suction hole on the cleaning cylinder to prevent clogging. A No. 4 spring is sleeved on the guide rod of the sealing frame. An unlocking block is fixed to the sealing frame, and an unlocking rod is fixed to the sealing plate. The unlocking rod is used to squeeze the unlocking block to drive the sealing frame to release the seal on the cleaning cylinder.

[0013] Furthermore, it also includes a reciprocating mechanism for expanding the cleaning range of the cleaning cylinder. The reciprocating mechanism includes a turntable, which is rotatably connected to the dust collection box. A lever is fixedly connected to the eccentric position of the turntable, and a swing arm is fixedly connected to the exhaust pipe. The lever is slidably connected to a groove on the swing arm, so that when the turntable rotates, it can drive the slide to move back and forth through the lever and the swing arm.

[0014] Furthermore, it also includes a dual-drive mechanism for driving the turntable and the drive shaft to rotate. The dual-drive mechanism includes an electric motor, which is fixed to the dust collector. A main pulley is fixed to the output shaft of the electric motor. The main pulley is fixed to the turntable. An auxiliary pulley is fixed to the drive shaft. A drive belt is wound around both the main pulley and the auxiliary pulley.

[0015] Furthermore, it also includes a telescopic plate to prevent dust from entering the dust collection box through the cleaning frame; the telescopic plate is slidably connected to the cleaning frame.

[0016] The beneficial effects are: 1. This equipment uses a dust concentration sensor to detect the dust concentration in real time. The DCS system dynamically adjusts the blowing parameters based on the detection data to improve the dust cleaning effect on the filter bag surface. This can avoid excessive blowing, reduce mechanical wear of the filter bag, and reduce unnecessary energy consumption.

[0017] 2. This equipment uses a partition to divide the interior of the dust collection box into two interconnected dust collection spaces. Each dust collection space corresponds to a dust-laden space that needs to be cleaned. This avoids the defects that exist when relying on the main pipeline to uniformly distribute the dust-laden airflow. Moreover, the connection between the two dust collection spaces can be controlled by a sealing plate. When one dust collection space needs cleaning or maintenance, the sealing plate corresponding to that dust collection space can be closed, while the other dust collection space can continue to operate. This retains the offline cleaning function of the offline pulse dust collector, ensuring the continuous operation of the entire system and avoiding the impact on normal production in the corresponding dust-laden space due to the shutdown of a single dust collection space.

[0018] 3. This equipment connects the auxiliary gear and the sealing plate together via a torsion spring. When the drive shaft rotates, it first drives the sealing plate to rotate to a horizontal position through the meshing of the main gear and the auxiliary gear to seal the dust removal space. It can also continue to rotate to drive the scraper downward through the take-up reel and the pull rope. The scraper scrapes off the dust adhering to the surface of the filter bag, thereby thinning the adhering dust to facilitate cleaning by jet cleaning. This significantly improves the cleaning effect of the filter bag and is especially suitable for handling highly sticky and difficult-to-remove dust.

[0019] 4. The dust baffle in this equipment can automatically cover the nozzle tip when dust removal is not required, effectively preventing impurities in the dust-laden gas from entering the spray pipe, reducing the risk of nozzle clogging, and ensuring the long-term effective use of the nozzle.

[0020] 5. This equipment, by installing an exhaust pipe and a cleaning cylinder inside the dust collection box, can promptly discharge the cleaned dust, preventing the dust from being re-adsorbed onto the filter bag surface and causing secondary pollution. Furthermore, the pressing action of the unlocking block and the depressurization rod can control the movement of the sealing frame, thereby controlling the opening and closing of the dust suction holes on the cleaning cylinder and preventing the cleaning cylinder from being clogged by dust when not in use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the internal structure of the dust collector box of the present invention.

[0023] Figure 3 This is a schematic diagram showing the positional relationship of the sealing plates in this invention.

[0024] Figure 4 This is a schematic diagram showing the positional relationship of the scraper in this invention.

[0025] Figure 5 This is a schematic diagram of the sealing plate structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the positional relationship of the positioning frame in this invention.

[0027] Figure 7 This is a schematic diagram of the trigger linkage structure of the present invention.

[0028] Figure 8 This is a schematic diagram of the dust baffle structure of the present invention.

[0029] Figure 9 This is a schematic diagram showing the positional relationship of the sealing frame according to the present invention.

[0030] Figure 10 This is a schematic diagram of the cleaning cylinder structure of the present invention.

[0031] Figure 11 This is a schematic diagram of the sealing frame structure of the present invention.

[0032] Figure 12 This is a schematic diagram showing the positional relationship of the lever in this invention.

[0033] In the attached diagram, the following are the reference numerals: 10-Dust collector, 11-Filter bag, 12-Clean air box, 13-Air manifold, 14-Electric valve, 15-Main air pipe, 16-Pulse valve, 17-Outlet pipe, 18-Dust concentration sensor, 20-Dust hopper, 21-Inlet pipe, 22-Baffle plate, 23-Sealing plate, 30-Drive shaft, 31-Main gear, 32-Secondary gear, 33-Torsion spring, 34-Positioning groove, 35-Positioning frame, 36-Spring No. 1, 37-Suppressor plate, 38-Cam, 39-Positioning rod, 40-Dust removal guide rod, 41-Scraper, 4 2-Spring No. 2, 43-Roller, 44-Pull Rope, 50-Dustproof Frame, 51-Dustproof Plate, 52-Dustproof Guide Rod, 53-Spring No. 3, 54-Actuating Linkage Rod, 55-Slide Track, 56-Slide Rod, 60-Cleaning Frame, 61-Slide Seat, 62-Cleaning Cylinder, 63-Sealing Frame, 64-Spring No. 4, 65-Unlocking Block, 66-Unlocking Rod, 67-Telescopic Plate, 70-Turntable, 71-Lever, 72-Swing Rod, 73-Exhaust Pipe, 80-Motor, 81-Main Pulley, 82-Secondary Pulley, 83-Transmission Belt. Detailed Implementation

[0034] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0035] Example 1: A dynamic back-flushing bag filter dust collector based on dust sensing, such as... Figures 1-3As shown, the system includes a dust collector 10, filter bags 11, a clean air chamber 12, a dust hopper 20, an air inlet pipe 21, a partition plate 22, a sealing plate 23, and a dynamic back-blowing mechanism. The top wall of the dust collector 10 has multiple through holes arranged in an array to communicate with the outside. Each through hole contains a fixed filter bag 11. The installation method of the filter bags 11 can refer to existing pulse dust collectors. Two independent clean air chambers 12 are symmetrically fixed to the top of the dust collector 10. The clean air chambers 12 have openings for the exhaust of the airflow after dust removal. The clean air outlet has two sets of filter bags 11 on the dust collector 10, which are arranged below two clean air chambers 12. A partition 22 is fixedly connected to the inner top wall of the dust collector 10, and the front and rear ends of the partition 22 are fixedly connected to the front and rear side walls of the dust collector 10. The partition 22 is located on the axis of symmetry of the two sets of filter bags 11. The partition 22 is used to symmetrically divide the interior of the dust collector 10 into two dust collection spaces. Two ash hoppers 20 are symmetrically fixed to the bottom of the dust collector 10. Each ash hopper 20 is located at... Below a dust removal space, each ash hopper 20 is connected to an air inlet pipe 21. Each air inlet pipe 21 is individually connected to a dust-laden space that needs dust removal. There is a gap between the partition plate 22 and the ash hopper 20 below, so that when dust removal work in a certain dust removal space is stopped, the dust-laden gas input from the air inlet pipe 21 below that dust removal space can enter another normally operating dust removal space. There are two sealing plates 23 symmetrically rotated inside the dust removal box 10. The gap between the sealing plate 23 and the dust removal box 10 is sealed with a sealing material in the prior art. The sealing plate 23 is used to seal the corresponding dust removal space to prevent dust from continuing to enter the dust removal space that has stopped working when dust removal work is stopped, and to prevent the dust in the dust removal space that has stopped working from being carried by the airflow to another normally operating dust removal space. A dynamic back-blowing mechanism is installed on the dust removal box 10. The dynamic back-blowing mechanism can control the pressure and flow rate of the blowing according to the dust concentration in the dust removal space.

[0036] like Figures 1-3As shown, the dynamic backflushing mechanism includes an air tank 13, an electric valve 14, a main air pipe 15, a pulse valve 16, an outlet pipe 17, and a dust concentration sensor 18. An air tank 13 is fixedly mounted on the clean air box 12 via a bracket. The air tank 13 is a storage tank used to store compressed gas in existing pulse bag dust collectors. An electric valve 14 is fixedly mounted on the outlet end of each air tank 13. The electric valve 14 is an electric ball valve, and the outlet end of the electric ball valve is connected to the main air pipe 15. Eight valves are equidistantly connected to the main air pipe 15. Each pulse valve 16 has an outlet end that is fixedly connected to a blowpipe for cleaning filter bags 11. The blowpipe extends into the corresponding clean air chamber 12. Multiple nozzles are fixedly connected at equal intervals along the blowpipe, each nozzle corresponding to one filter bag 11. Two clean air chambers 12 are fixedly connected to an outlet pipe 17. The clean air outlet of the clean air chamber 12 is connected to the interior of the outlet pipe 17. During the production of this equipment, valves need to be installed on the clean air chamber 12 or the outlet pipe 17 to control the connection between the clean air chamber 12 and the outlet pipe 17. Figure 2 It can be seen that two dust concentration sensors 18 are symmetrically fixed to the lower side of the left and right side walls of the partition 22. The dust concentration sensors 18 are used to detect the dust concentration in the dust removal space on the same side. The pulse valve 16, the dust concentration sensor 18 and the electric ball valve are controlled by the DCS system. The pulse valve 16, the dust concentration sensor 18 and the electric ball valve are connected to the DCS system through signal lines.

[0037] When using this equipment, connect the external fan to the outlet pipe 17 to provide negative pressure inside the dust collection box 10. Then, connect the dust-laden space requiring dust removal to the inlet pipe 21 through a pipe, with each inlet pipe 21 corresponding to a separate dust-laden space. The dust-laden gas is then transported into the dust collection box 10 through the inlet pipe 21. Under negative pressure, the dust-laden gas passes through the filter bag 11 and enters the clean air box 12, before being discharged through the outlet pipe 17. When cleaning, maintaining, or replacing the filter bag 11 in one of the dust collection spaces is required, first block the connection between the inlet pipe 21 and the clean air box 12 using the valve installed on the clean air box 12. The connection of 2 is established, and then the corresponding sealing plate 23 below the dust removal space is controlled to rotate to a horizontal state, preventing dust-laden gas from entering the dust removal space during cleaning, maintenance, or replacement. This avoids interference from dust-laden gas with cleaning, maintenance, or replacement work, and also prevents airflow fluctuations during cleaning from interfering with the normal operation of the other dust removal space. Meanwhile, dust-laden gas entering through the inlet pipe 21 below the dust removal space will enter the other dust removal space under negative pressure. At this time, the dust-laden gas in both inlet pipes 21 will undergo dust removal treatment in the other normally operating dust removal space, thus continuously cleaning both... Dust-laden gas in each dust-laden space is treated to prevent environmental pollution or disruption to normal production processes caused by downtime. The sealing plate 23 is opened only after cleaning, maintenance, or replacement is completed. A dust concentration sensor 18 detects the dust concentration in the corresponding dust-laden space and transmits the detected signal to the DCS system. The DCS system calculates the appropriate valve opening based on control logic and sends a control signal to the electric actuator of the electric ball valve, which then drives the valve. As the dust concentration increases, the electric ball valve opens wider to increase the pressure and flow rate of compressed air to meet the dust removal requirements. When the dust concentration decreases, the electric ball valve opens narrower to reduce the blowing pressure and flow rate. After the electric ball valve is adjusted, the DCS system controls the pulse valve 16 to open for blowing, thus achieving precise adjustment of the blowing pressure and flow rate. After the pulse valve 16 is opened, high-pressure gas blows onto the filter bag 11 through the blowing pipeline. The blowing direction of the high-pressure gas is opposite to the flow direction of the dust-laden gas during dust removal, so as to blow the dust particles on the filter bag 11 toward the sealing plate 23.

[0038] Example 2: Based on Example 1, such as Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, it also includes a locking mechanism for controlling the rotation of the sealing plate 23. The locking mechanism is installed inside the dust collector 10 and includes a drive shaft 30, a main gear 31, a secondary gear 32, a torsion spring 33, a positioning frame 35, a first spring 36, a stop plate 37, a cam 38, and a positioning rod 39. Two drive shafts 30 are symmetrically rotatably connected inside the dust collector 10, and the drive shafts 30 are arranged parallel to each other above the sealing plate 23 on the same side. Figure 5 It can be seen that a main gear 31 is fixedly connected to the drive shaft 30, and a secondary gear 32 that meshes with the main gear 31 is rotatably connected to the rotating shaft of the sealing plate 23. Both the main gear 31 and the secondary gear 32 are gears with missing teeth. A torsion spring 33 is sleeved on the rotating shaft of the sealing plate 23. One end of the torsion spring 33 is fixedly connected to the rotating shaft of the sealing plate 23, and the other end of the torsion spring 33 is fixedly connected to the secondary gear 32. A positioning groove 34 is opened at the end of the sealing plate 23 near the side wall of the dust collector 10. Two positioning frames 35 are symmetrically slidably connected inside the dust collector 10. The positioning frames 35 are located near the sealing plate 20. Three positioning rods 39 are fixedly connected at equal intervals on one side of the 3. When the sealing plate 23 rotates to a horizontal state, the positioning rods 39 will be inserted into the positioning groove 34 to restrict the rotation of the sealing plate 23. A first spring 36 is sleeved on the guide rod of the positioning frame 35. The first spring 36 is used to push the positioning frame 35 to move towards the sealing plate 23. A stop plate 37 is fixedly connected to the positioning frame 35. The upper end of the stop plate 37 is an inclined surface. A cam 38 is rotatably connected to the transmission shaft 30 through a one-way bearing. The cam 38 is used to push the stop plate 37 to drive the positioning rods 39 out of the positioning groove 34.

[0039] Taking the left sealing plate 23 as an example, when the sealing plate 23 needs to rotate to a horizontal position, the drive shaft 30 on the left side drives the main gear 31 to rotate clockwise. The main gear 31 will mesh with the secondary gear 32 and drive the sealing plate 23 to rotate counterclockwise through the torsion spring 33. During the rotation of the sealing plate 23, the positioning rod 39 will first push the positioning frame 35 away, and the first spring 36 will be compressed. When the sealing plate 23 rotates to a horizontal position, the first spring 36 pushes the positioning frame 35 closer to the sealing plate 23, so that the positioning rod 39 is inserted into the positioning groove 34, thereby making the sealing plate 23 rotate counterclockwise. 3. Keep the dust removal space closed and avoid prolonged stress on the teeth of the main gear 31 and the secondary gear 32, which would reduce their service life. The cam 38 is mounted on the drive shaft 30 via a one-way bearing. When the drive shaft 30 on the left rotates clockwise, it will not apply force to the cam 38. However, when the drive shaft 30 rotates counterclockwise, it will drive the cam 38 to rotate synchronously. The cam 38 will press against the abutment plate 37 and drive the positioning frame 35 to move away from the sealing plate 23 through the abutment plate 37, so that the positioning rod 39 can be moved out of the positioning groove 34, thereby allowing the sealing plate 23 to rotate clockwise and reset.

[0040] like Figure 4 , Figure 7 and Figure 8As shown, it also includes a shielding mechanism to prevent blockage of the jet pipe. The shielding mechanism is located on both sides of the partition 22. The shielding mechanism includes a dust baffle 50, a dust baffle plate 51, a dust baffle guide rod 52, a No. 3 spring 53, a triggering rod 54, and a sliding rod 56. Each clean air box 12 is fixedly connected to a dust baffle 50. The dust baffle 50 has multiple through holes arranged in an array. Each through hole is rotatably connected to a dust baffle plate 51. The dust baffle plate 51 is used to shield the air outlet of the nozzle in the jet pipe. The dust baffle plate 51 in the same column corresponds to the jet pipe on a pulse valve 16. Each clean air box 12 has a total of eight columns of dust baffle plates 51, and the dust baffle plates 51 in the same column are fixedly connected to the same... On a rotating shaft, dust baffles 51 in the same column can rotate synchronously. Two sets of dust baffle guide rods 52 are symmetrically slidably connected to the partition 22. Each set of dust baffle guide rods 52 has eight rods. A triggering rod 54 is slidably connected to the same set of dust baffle guide rods 52. The two triggering rods 54 are symmetrical about the partition 22. Eight I-shaped slide rails 55 are equidistantly spaced horizontally on the upper side of the triggering rods 54. Slide rods 56 are fixed to the ends of the rotating shafts of the dust baffles 51 in the same column, and the slide rods 56 are located in an eccentric position. Each slide rod 56 is slidably disposed within a slide rail 55, so that when the triggering rods 54 rise and fall, they can drive the dust baffles 51 to rotate via the slide rods 56. Figure 7 It can be seen that the lower end of the triggering rod 54 is symmetrically provided with two downward extending long rods. When the sealing plate 23 rotates to a horizontal state to close the corresponding dust removal space, the sealing plate 23 will push the triggering rod 54 upward through the long rods. The dust blocking guide rod 52 is fitted with a No. 3 spring 53 for pushing the triggering rod 54 downward to reset.

[0041] When the sealing plate 23 rotates to a horizontal position, it pushes the trigger rod 54 on the same side to move upward. The upward movement of the trigger rod 54 causes the dust baffle 51 to rotate downward and open via the slide rod 56. The third spring 53 is compressed, thereby opening the through hole on the dust baffle frame 50, so that the nozzle in the spray pipe can spray high-pressure gas downward. When the sealing plate 23 returns to its original position, the third spring 53 pushes the trigger rod 54 to return to its original position. The downward movement of the trigger rod 54 causes the dust baffle 51 to rotate to a horizontal position via the slide rod 56. The horizontal dust baffle 51 will be in close contact with the air outlet of the nozzle, effectively preventing dust, oil and other impurities from entering the nozzle and reducing the risk of nozzle clogging.

[0042] like Figure 2 and Figure 3As shown, it also includes a cleaning mechanism for cleaning adhesive dust. The cleaning mechanism is connected to the drive shaft 30. The cleaning mechanism includes a scraper 41, a dust removal guide rod 40, a second spring 42, a winding wheel 43, and a pull rope 44. Two sets of dust removal guide rods 40 are symmetrically fixed inside the dust collector 10. Each set of dust removal guide rods 40 consists of two rods, and each set of dust removal guide rods 40 is located in a dust removal space. The scraper 41 is slidably connected to the same set of dust removal guide rods 40. Multiple circular scrapers are equidistantly arranged on the scraper 41. Each circular scraper corresponds to a filter bag 11, and the circular scraper is sleeved on the surface of the filter bag 11. A second spring 42 is sleeved on the dust removal guide rod 40 to push the scraper 41 to return to its original position. A winding wheel 43 is fixed to the drive shaft 30. One end of the pull rope 44 is fixed to the winding wheel 43, and the other end of the pull rope 44 is fixed to the scraper 41.

[0043] In some special working conditions, dust particles with strong adhesion are generated. For example, in the iron and steel smelting industry, in the purification of blast furnace gas and dust removal of converter flue gas, the dust has the characteristics of high temperature, high humidity and high viscosity, which easily forms an adhesion layer on the surface of filter bag 11. It is difficult to remove the adhesion layer by pulse jet cleaning alone. Therefore, it is necessary to first scrape off the adhesion layer to make it thinner, and then clean off the remaining adhesion layer by pulse jet cleaning. Taking the left drive shaft 30 as an example, when the left drive shaft 30 rotates clockwise, it will drive the winding wheel 43 to rotate synchronously. The winding wheel 43 will pull the rope 4 through the winding wheel 4 4. Moving scraper 41 downwards compresses spring 42, bringing scraper 41 into contact with the surface of filter bag 11. This scrapes away the adhesive layer on the filter bag 11, causing the dust particles to fall downwards. The blowing process begins again when scraper 41 reaches the underside of filter bag 11. When the left drive shaft 30 rotates counterclockwise, spring 42 gradually pushes scraper 41 upwards to reset. Since the sealing plate 23 can rotate to a horizontal position under the action of main gear 31 and auxiliary gear 32 after one clockwise rotation of the left drive shaft 30, but the drive shaft 30 needs to rotate clockwise multiple times to achieve this, the cleaning process is more efficient. The scraper 41 continues to move downwards. To prevent the equipment from jamming, the shafts of the auxiliary gear 32 and the sealing plate 23 are connected by a torsion spring 33. When the sealing plate 23 rotates to a horizontal position and the drive shaft 30 continues to rotate clockwise, the main gear 31 will drive the auxiliary gear 32 to continue rotating counterclockwise by a certain angle. However, since the sealing plate 23 cannot continue to rotate counterclockwise, the torsion spring 33 will be charged. When the main gear 31 and the auxiliary gear 32 disengage, the torsion spring 33 will drive the auxiliary gear 32 to rotate clockwise to reset. Similarly, the drive shaft 30 needs to rotate counterclockwise several times before scraping... Only when the sealing plate 23 is pushed by the second spring 42 can the plate 41 be fully reset upwards. When the sealing plate 23 is reset by rotating clockwise and the transmission shaft 30 continues to rotate counterclockwise, the main gear 31 will drive the auxiliary gear 32 to continue to rotate clockwise by a certain angle. However, since the sealing plate 23 cannot continue to rotate clockwise, the torsion spring 33 will be charged. When the main gear 31 and the auxiliary gear 32 disengage, the torsion spring 33 will drive the auxiliary gear 32 to rotate counterclockwise to reset, so that the main gear 31 can engage with the auxiliary gear 32 when the transmission shaft 30 rotates clockwise again, so as to drive the sealing plate 23 to rotate to a horizontal state again.

[0044] Example 3: Based on Example 2, such as Figure 1 , Figure 9 and Figure 10As shown, it also includes a self-cleaning structure to prevent the cleaned dust from being re-adsorbed. The self-cleaning mechanism is installed on the dust collection box 10. The self-cleaning mechanism includes a cleaning frame 60, a slide 61, a cleaning cylinder 62, and an exhaust pipe 73. Two cleaning frames 60 are symmetrically fixed to the side wall of the dust collection box 10. Each cleaning frame 60 corresponds to a dust collection space. The slide 61 is slidably connected to the cleaning frame 60 in the horizontal direction. The exhaust pipe 73 is fixed to the slide 61 and is connected to the external vacuuming equipment. The cleaning cylinder 62 is fixedly connected to the exhaust pipe 73. The cleaning cylinder 62 is a hollow shell structure and has 16 through holes symmetrically opened on the cleaning cylinder 62 for vacuuming.

[0045] like Figure 9 and Figure 10 As shown, the self-cleaning mechanism also includes a sealing frame 63, a No. 4 spring 64, an unlocking block 65, and an unlocking rod 66. The sealing frame 63 is slidably connected to the cleaning cylinder 62 along its length. The sealing frame 63 is used to seal the dust suction hole on the cleaning cylinder 62 to prevent clogging. A No. 4 spring 64 is sleeved on the guide rod of the sealing frame 63. Eight unlocking blocks 65 are fixedly connected at equal intervals at the lower end of the sealing frame 63. Eight unlocking rods 66 are fixedly connected at equal intervals on the sealing plate 23. The unlocking rods 66 are used to squeeze the unlocking blocks 65 to drive the sealing frame 63 to release the seal on the cleaning cylinder 62.

[0046] The dust particles on the surface of filter bag 11 are generally low in density, so they are adsorbed onto the surface of filter bag 11 by the airflow. In order to prevent the dust that has been cleaned off from being re-adsorbed into the dust removal space after the sealing plate 23 is opened, the dust that has been cleaned off needs to be cleaned. When the sealing plate 23 rotates to the horizontal position, the unlocking rod 66 will squeeze the unlocking block 65, so that the sealing frame 63 slides to open the dust suction hole on the cleaning cylinder 62. The fourth spring 64 will be compressed, connecting the air suction pipe 73 to the external dust collection equipment in advance. After the sealing plate 23 rotates to the horizontal position, the external dust collection equipment will be started, thereby expelling the dust particles that have been cleaned off and the dust particles scraped off by the scraper 41. When the sealing plate 23 is reset, the unlocking rod 66 will disengage from the unlocking block 65, and the fourth spring 64 will push the sealing frame 63 to reset. The reset sealing frame 63 will seal the dust suction hole on the cleaning cylinder 62 to prevent dust from entering the cleaning cylinder 62 and causing blockage.

[0047] Example 4: Based on Example 3, such as Figure 1 , Figure 9 and Figure 12As shown, it also includes a reciprocating mechanism for expanding the cleaning range of the cleaning cylinder 62. The reciprocating mechanism is connected to the exhaust pipe 73. The reciprocating mechanism includes a turntable 70, a lever 71, and a swing arm 72. Two sets of turntables 70 are symmetrically rotatably connected to the outer wall of the dust collection box 10. Each set of turntables 70 corresponds to a dust collection space. There are two turntables 70 in each set, and one of the turntables 70 is rotatably connected to the outer wall of the dust collection box 10. The lever 71 is fixedly connected to the eccentric position of the two turntables 70. The swing arm 72 is fixedly connected to the exhaust pipe 73. A straight groove is opened on the swing arm 72. The lever 71 is slidably connected in the straight groove on the swing arm 72.

[0048] like Figure 1 and Figure 12 As shown, it also includes a dual-drive mechanism for driving the turntable 70 and the drive shaft 30 to rotate. The dual-drive mechanism includes a motor 80, a main pulley 81, an auxiliary pulley 82 and a drive belt 83. Two motors 80 are symmetrically fixed to the outside of the dust collector 10 by a bracket. The output shaft of each motor 80 is fixed to a main pulley 81. The main pulley 81 is fixed to a turntable 70 away from the dust collector 10. One end of the drive shaft 30 extends out of the side wall of the dust collector 10, and the auxiliary pulley 82 is fixed to the same end of the drive shaft 30. The drive belt 83 is wound on the main pulley 81 and the auxiliary pulley 82 on the same side.

[0049] like Figure 1 As shown, it also includes a telescopic plate 67. The telescopic plate 67 is slidably connected to the cleaning frame 60. One end of the telescopic plate 67 is fixedly connected to the slide seat 61, and the other end of the telescopic plate 67 is fixedly connected to the frame of the cleaning frame 60. The telescopic plate 67 is a slidable and telescopic sealed structure.

[0050] When the motor 80 rotates, it drives the turntable 70 to rotate. When the turntable 70 rotates, it drives the slide 61 to move back and forth through the lever 71, the swing arm 72 and the air extraction pipe 73, thereby driving the cleaning cylinder 62 to move back and forth to expand the dust collection area and improve the self-cleaning effect. The telescopic plate 67 can freely extend and retract with the movement of the slide 61 to prevent external air from directly entering the dust collection box 10 through the cleaning frame 60. When the motor 80 rotates, it also drives the transmission shaft 30 through the main pulley 81, the auxiliary pulley 82 and the transmission belt 83 to drive the sealing plate 23 to rotate to a horizontal state and drive the scraper 41 to move downward.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dynamic back-flushing bag filter dust collector based on dust sensing, comprising a dust collection box (10) and filter bags (11) installed inside the dust collection box (10), characterized in that: Two clean air boxes (12) for exhausting the gas after dust removal are fixedly connected to the dust collector (10). A partition (22) is fixedly connected inside the dust collector (10). The filter bags (11) inside the dust collector (10) are divided into two groups by the partition (22) to divide the interior of the dust collector (10) into two dust removal spaces. The two dust removal spaces are connected at the bottom. Two ash hoppers (20) are fixedly connected to the dust collector (10). An air inlet pipe (21) is fixedly connected to the ash hopper (20). Each air inlet pipe (21) is connected to a dust-containing space that needs to be removed. A sealing plate (23) is rotatably connected to the dust collector (10). The sealing plate (23) is used to seal the corresponding dust removal space for cleaning and maintenance. A dynamic back-blowing mechanism is installed on the dust collector (10). The dynamic back-blowing mechanism can control the pressure and flow rate of the spray according to the dust concentration in the dust removal space. The dynamic backflushing mechanism includes an air tank (13), which is fixedly installed on the clean air box (12). An electric valve (14) is fixedly installed at the air outlet of the air tank (13). The air outlet of the electric valve (14) is connected to the main air pipe (15). Multiple pulse valves (16) are fixedly connected to the main air pipe (15). A jetting pipeline for cleaning the filter bag (11) is installed on the pulse valve (16). Multiple nozzles are fixedly connected to the jetting pipeline. An air outlet pipe (17) is connected to the clean air box (12). A dust concentration sensor (18) is fixedly connected to the partition (22). The dust concentration sensor (18) is used to detect the dust concentration in the dust removal space so as to adjust the opening of the electric valve (14) according to the detection data.

2. The dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 1, characterized in that: It also includes a locking mechanism for controlling the rotation of the sealing plate (23). The locking mechanism includes a drive shaft (30), which is rotatably connected inside the dust collector (10). A main gear (31) is fixedly connected to the drive shaft (30). A secondary gear (32) that cooperates with the main gear (31) is rotatably connected to the shaft of the sealing plate (23). A torsion spring (33) is connected between the secondary gear (32) and the sealing plate (23). A positioning groove (34) is provided on the sealing plate (23). A positioning frame (35) is slidably connected inside the dust collector (10). A positioning rod (39) that cooperates with the positioning groove (34) to limit the rotation of the sealing plate (23) is fixedly connected to the positioning frame (35). A first spring (36) is sleeved on the guide rod of the positioning frame (35). A cam (38) is rotatably connected to the drive shaft (30). The cam (38) is used to drive the positioning rod (39) out of the positioning groove (34) by squeezing.

3. The dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 1, characterized in that: It also includes a shielding mechanism to prevent blockage of the spray pipe. The shielding mechanism includes a dust shield (50), which is fixedly connected to the clean air box (12). A dust shield (51) is rotatably connected to the dust shield (50). The dust shield (51) is used to shield the air outlet of the nozzle in the spray pipe. A triggering rod (54) is slidably connected to the partition (22) through a dust shielding guide rod (52). A slide rail (55) is provided on the triggering rod (54). A slide rod (56) is fixedly connected to the end of the rotating shaft of the dust shield (51), and the slide rod (56) is slidably set in the slide rail (55). During the rotation of the sealing plate (23), it can push the triggering rod (54) to move so as to drive the dust shield (51) to rotate through the triggering rod (54). A No. 3 spring (53) is sleeved on the dust shielding guide rod (52) for pushing the triggering rod (54) to reset.

4. The dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 2, characterized in that: It also includes a cleaning mechanism for cleaning adhesive dust. The cleaning mechanism includes a dust removal guide rod (40), which is fixed inside the dust collector (10). A scraper (41) is slidably connected to the dust removal guide rod (40). The scraper (41) is provided with multiple circular scrapers, which are sleeved on the surface of the filter bag (11). A second spring (42) for pushing the scraper (41) to reset is sleeved on the dust removal guide rod (40). A winding wheel (43) is fixed to the drive shaft (30), and a pull rope (44) is connected between the winding wheel (43) and the scraper (41).

5. A dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 2, characterized in that: It also includes a self-cleaning structure to prevent the cleaned dust from being re-adsorbed. The self-cleaning mechanism includes a cleaning frame (60), which is fixed to the dust collection box (10). A suction pipe (73) is slidably connected to the cleaning frame (60) via a slide (61). The suction pipe (73) is connected to an external dust collection device. A cleaning cylinder (62) is fixedly connected to the suction pipe (73). The cleaning cylinder (62) is located inside the dust collection box (10). A through hole for dust collection is opened on the cleaning cylinder (62).

6. The dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 5, characterized in that: The self-cleaning mechanism also includes a sealing frame (63), which is slidably connected to the cleaning cylinder (62). The sealing frame (63) is used to seal the dust suction hole on the cleaning cylinder (62) to prevent blockage. A No. 4 spring (64) is sleeved on the guide rod of the sealing frame (63). An unlocking block (65) is fixedly connected to the sealing frame (63), and an unlocking rod (66) is fixedly connected to the sealing plate (23). The unlocking rod (66) is used to squeeze the unlocking block (65) to drive the sealing frame (63) to release the seal on the cleaning cylinder (62).

7. The dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 5, characterized in that: It also includes a reciprocating mechanism for expanding the cleaning range of the cleaning cylinder (62). The reciprocating mechanism includes a turntable (70), which is rotatably connected to the dust collection box (10). A lever (71) is fixedly connected to the eccentric position of the turntable (70), and a swing arm (72) is fixedly connected to the exhaust pipe (73). The lever (71) is slidably connected to the groove on the swing arm (72), so that when the turntable (70) rotates, it can drive the slide block (61) to reciprocate through the lever (71) and the swing arm (72).

8. The dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 7, characterized in that: It also includes a dual-drive mechanism for driving the turntable (70) and the drive shaft (30) to rotate. The dual-drive mechanism includes an electric motor (80), which is fixed to the dust collector (10). A main pulley (81) is fixed to the output shaft of the electric motor (80). The main pulley (81) is fixed to the turntable (70). A secondary pulley (82) is fixed to the drive shaft (30). A drive belt (83) is wound on both the main pulley (81) and the secondary pulley (82).

9. A dynamic back-flushing bag filter dust collector based on dust sensing as described in claim 7, characterized in that: It also includes a telescopic plate (67) for preventing dust from entering the dust collection box (10) through the cleaning frame (60), the telescopic plate (67) being slidably connected to the cleaning frame (60).

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