Dynamic back-flushing cloth bag dust removal equipment based on dust induction

Abstract

The invention relates to the technical field of cloth bag dust removal equipment, in particular to dynamic back-flushing cloth bag dust removal equipment based on dust induction, which comprises a dust removal box, filter bags mounted in the dust removal box, two gas purification boxes fixedly connected to the dust removal box and used for discharging dust-removed gas, a partition plate fixedly connected to the interior of the dust removal box, and the filter bags in the dust removal box are divided into two groups by the partition plate. The dust removal box is internally divided into two dust removal spaces, the lower sides of the two dust removal spaces are communicated, two dust hoppers are fixedly connected to the dust removal box, air inlet pipes are fixedly connected to the dust hoppers in a communicating mode, each air inlet pipe is independently communicated with a dust-containing space needing dust removal, and the dust removal box is rotationally connected with a sealing plate; and the sealing plates are used for sealing the corresponding dust removal spaces so as to facilitate dust removal and maintenance. According to the equipment, the dust concentration is detected in real time through the dust concentration sensor, and the DCS system dynamically adjusts blowing parameters according to detection data, so that the cleaning effect of dust on the surface of the filter bag is improved, excessive blowing can be avoided, and unnecessary energy consumption can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bag dust removal equipment, and particularly to a dynamic back-blow bag dust removal equipment based on dust induction. Background Art

[0002] A bag filter is a common dust removal equipment in industry. It can not only separate the solid substances contained in the gas through the bag, but also clean the bag by pulse back-blowing through a blowpipe.

[0003] Among them, the off-line pulse bag filter sets up multiple independent dust removal chambers and is equipped with independently controllable valves to achieve off-line operation of each chamber one by one during dust cleaning, and the remaining chambers maintain online operation, ensuring the continuity of overall dust removal to a certain extent.

[0004] However, for the off-line pulse bag filter, the main air flow pipe is relied on to uniformly distribute the dust-containing air flow to each independent dust removal chamber. When the main air flow pipe fails or needs to be overhauled, the entire dust removal system needs to be shut down. After shutdown, not only can't all the connected dust-containing spaces continue to remove dust, but also in some high-risk and high-requirement working environments, such as during the operation of equipment like blast furnaces and converters in the iron and steel metallurgy industry, and in the working conditions of treating toxic and harmful dust in chemical production, the shutdown of the dust removal system will cause a large amount of dust-containing waste gas to be directly discharged without treatment, which will not only cause environmental pollution, but also the dust accumulation caused by the shutdown of the dust removal system may lead to equipment blockage, and even cause safety accidents such as fires or explosions. Therefore, on the basis of ensuring the off-line dust cleaning function and the continuity of dust removal, it is necessary to provide a more reliable bag dust removal equipment to enhance the stability and safety of the equipment. Summary of the Invention

[0005] In order to overcome the disadvantages that when the main pipeline of the off-line pulse bag filter in the prior art fails, the entire dust removal system needs to be shut down, not only can't continue to remove dust from all the connected dust-containing spaces, but also in some high-risk and high-requirement working environments, it may cause the dust-containing waste gas to be directly discharged without treatment and lead to safety accidents, the present invention provides a dynamic back-blow bag dust removal equipment based on dust induction. The inner part of the dust removal box is divided into two dust removal spaces with connected lower sides by a partition board. Each dust removal space corresponds to a dust-containing space that needs to be dusted separately, avoiding the defects existing when relying on the main pipeline to uniformly distribute the dust-containing air flow. Moreover, when one of the dust removal spaces needs to be dust-cleaned or maintained, the sealing plate corresponding to this dust removal space can be closed, and the other dust removal space can still continue to operate, retaining the off-line dust cleaning function and ensuring continuous dust removal operation.

[0006] The technical solution of the present invention is: a dynamic reverse blowing bag dust removal device based on dust induction, which includes a dust removal box. Filter bags are installed in the dust removal box. Two clean gas boxes for discharging the dust-removed gas are fixedly connected to the dust removal box. A partition is fixedly connected in the dust removal box. The filter bags in the dust removal box are divided into two groups by the partition, so as to divide the interior of the dust removal box into two dust removal spaces, and the lower sides of the two dust removal spaces are connected. Two ash hoppers are fixedly connected to the dust removal box. An air inlet pipe is connected to the ash hopper in a communicating manner. Each air inlet pipe is separately connected to a dust-containing space that needs to be dust-removed. The dust removal box is rotatably connected with a sealing plate, and the sealing plate is used to close the corresponding dust removal space for easy ash cleaning and maintenance. A dynamic reverse blowing mechanism is installed on the dust removal box, and the dynamic reverse blowing mechanism can control the spraying pressure and flow rate according to the dust concentration in the dust removal space.

[0007] Further, the dynamic reverse blowing mechanism includes an air bag, the air bag is fixedly installed on the clean gas box, an electric valve is fixedly installed at the air outlet end of the air bag, the air outlet end of the electric valve is connected to a main air pipe in a communicating manner, a plurality of pulse valves are fixedly connected to the main air pipe, a spraying pipeline for cleaning the filter bag is installed on the pulse valve, and a plurality of spray heads are fixedly connected to the spraying pipeline. An air outlet pipe is connected to the clean gas box in a communicating manner. A dust concentration sensor is fixedly connected to the partition, and the dust concentration sensor is used to detect the dust concentration in the dust removal space, so as to adjust the opening degree of the electric valve according to the detection data.

[0008] Further, it also includes a locking mechanism for controlling the rotation of the sealing plate. The locking mechanism includes a transmission shaft, the transmission shaft is rotatably connected in the dust removal box, a main gear is fixedly connected to the transmission shaft, a sub-gear that cooperates with the main gear is rotatably connected to the rotating shaft of the sealing plate, and a torsion spring is connected between the sub-gear and the sealing plate. A positioning groove is opened on the sealing plate, a positioning frame is slidably connected in the dust removal box, a positioning rod that cooperates with the positioning groove to limit the rotation of the sealing plate is fixedly connected to the positioning frame, a first spring is sleeved on the guide rod of the positioning frame, and a cam is rotatably connected to the transmission shaft. The cam is used to drive the positioning rod to move out of the positioning groove through extrusion.

[0009] Further, it also includes a shielding mechanism for preventing the spraying pipeline from being blocked. The shielding mechanism includes a dust shielding frame, the dust shielding frame is fixedly connected in the clean gas box, a dust shielding plate is rotatably connected to the dust shielding frame, and the dust shielding plate is used to shield the air outlet end of the spray head in the spraying pipeline. A touch link rod is slidably connected to the partition through a dust shielding guide rod. A sliding groove is opened on the touch link rod. A sliding rod is fixedly connected to the end of the rotating shaft of the dust shielding plate, and the sliding rod is slidably arranged in the sliding groove. During the rotation of the sealing plate, the touch link rod can be pushed to move, so as to drive the dust shielding plate to rotate through the touch link rod. A third spring for pushing the touch link rod to reset is sleeved on the dust shielding guide rod.

[0010] Further, it further includes a cleaning mechanism for cleaning adherent dust. The cleaning mechanism includes a dust cleaning guide rod fixedly connected inside the dust removal box. A scraper is slidably connected to the dust cleaning guide rod. A plurality of circular scrapers are provided on the scraper, and the circular scrapers are sleeved on the surface of the filter bag. A second spring for pushing the scraper to reset is sleeved on the dust cleaning guide rod. A wire winding wheel is fixedly connected to the transmission shaft, and a pulling rope is connected between the wire winding wheel and the scraper.

[0011] Further, it further includes a self-cleaning structure for preventing the cleaned dust from being re-adsorbed. The self-cleaning mechanism includes a cleaning frame fixedly connected to the dust removal box. An air extraction pipe is slidably connected to the cleaning frame through a sliding seat. The air extraction pipe is communicated with an external dust suction device. A cleaning cylinder is communicatively and fixedly connected to the air extraction pipe. The cleaning cylinder is located inside the dust removal box, and through holes for dust suction are opened on the cleaning cylinder.

[0012] Further, the self-cleaning mechanism further includes a blocking frame slidably connected to the cleaning cylinder. The blocking frame is used to block the dust suction through holes on the cleaning cylinder to prevent blockage. A fourth spring is sleeved on the guide rod of the blocking frame. An unlocking block is fixedly connected to the blocking frame, and an unlocking rod is fixedly connected to the sealing plate. The unlocking rod is used to squeeze the unlocking block to drive the blocking frame to cancel the blockage of the cleaning cylinder.

[0013] Further, it further includes a reciprocating mechanism for expanding the cleaning range of the cleaning cylinder. The reciprocating mechanism includes a turntable rotatably connected to the dust removal box. A dial rod is fixedly connected to an eccentric position of the turntable. A swing rod is fixedly connected to the air extraction pipe. The dial rod is slidably connected in a chute on the swing rod, so that when the turntable rotates, the sliding seat can be driven to reciprocate through the dial rod and the swing rod.

[0014] Further, it further includes a dual-drive mechanism for driving the turntable and the transmission shaft to rotate. The dual-drive mechanism includes a motor fixedly connected to the dust removal box. Main belt pulleys are fixedly connected to the output shafts of the motor. The main belt pulley is fixedly connected to the turntable. A secondary belt pulley is fixedly connected to the transmission shaft. A transmission belt is wound around the main belt pulley and the secondary belt pulley together.

[0015] Further, it further includes a telescopic plate for preventing dust from entering the dust removal box through the cleaning frame. The telescopic plate is slidably connected to the cleaning frame.

[0016] The beneficial effects are as follows: 1. This device real-time detects the dust concentration through a dust concentration sensor, and the DCS system dynamically adjusts the spraying parameters according to the detected data, improving the cleaning effect of the dust on the surface of the filter bag. It can not only avoid excessive spraying, reduce the mechanical wear of the filter bag, but also reduce unnecessary energy consumption;

[0017] 2. This device uses a partition to divide the interior of the dust removal box into two dust removal spaces that communicate with each other at the lower side. Each dust removal space corresponds to a dust-containing space that needs dust removal separately, avoiding the defects existing when relying on the main pipeline to uniformly distribute the dust-containing air flow. Moreover, the connection state of the two dust removal spaces can be controlled through a sealing plate. When one of the dust removal spaces needs to be cleaned or maintained, the sealing plate corresponding to this dust removal space can be closed, and the other dust removal space can still continue to operate, retaining the off-line cleaning function of the off-line pulse dust removal device, ensuring the continuous operation of the entire system, and avoiding affecting the normal production in the corresponding dust-containing space due to the shutdown of a single dust removal space;

[0018] 3. In this device, the auxiliary gear and the sealing plate are connected together by a torsion spring, so that when the transmission shaft rotates, it can first drive the sealing plate to rotate to a horizontal state to close the dust removal space through the meshing of the main gear and the auxiliary gear, and can continue to rotate to drive the scraper to move downward through the wire take-up wheel and the pull rope, and scrape the dust adhered to the surface of the filter bag through the scraper, so as to make the adhered dust thinner for easy blowing and cleaning, significantly improving the cleaning effect of the filter bag, and being particularly suitable for treating dust with high viscosity and difficult to remove;

[0019] 4. The dust baffle in this device can automatically cover the end of the nozzle when dust cleaning is not required, effectively preventing impurities in the dust-containing gas from entering the blowing pipeline, reducing the risk of nozzle blockage, and ensuring the long-term effective use of the nozzle;

[0020] 5. By arranging an air extraction pipe and a cleaning cylinder in the dust removal box, this device can timely discharge the cleaned dust, avoiding secondary pollution caused by the dust being re-adsorbed onto the surface of the filter bag, and using the extrusion cooperation of the unlocking block and the decompression rod to control the movement of the plugging frame, so as to control the opening and closing of the dust suction through holes on the cleaning cylinder by the plugging frame, preventing the cleaning cylinder from being blocked by dust when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0023] Figure 3 It is a schematic diagram of the positional relationship of the sealing plate of the present invention.

[0024] Figure 4 It is a schematic diagram of the positional relationship of the scraper of the present invention.

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

[0026] Figure 6 It is a schematic diagram of the positional relationship of the positioning frame of the present invention.

[0027] Figure 7 Schematic diagram of the touch link structure of the present invention.

[0028] Figure 8 Schematic diagram of the dust shield structure of the present invention.

[0029] Figure 9 Schematic diagram of the positional relationship of the plugging frame of the present invention.

[0030] Figure 10 Schematic diagram of the cleaning cylinder structure of the present invention.

[0031] Figure 11 Schematic diagram of the plugging frame structure of the present invention.

[0032] Figure 12 Schematic diagram of the positional relationship of the lever of the present invention.

[0033] In the reference numerals: 10 - dust removal box, 11 - filter bag, 12 - clean air box, 13 - air bag, 14 - electric valve, 15 - main air pipe, 16 - pulse valve, 17 - air outlet pipe, 18 - dust concentration sensor, 20 - ash hopper, 21 - air inlet pipe, 22 - partition board, 23 - sealing plate, 30 - transmission shaft, 31 - main gear, 32 - sub - gear, 33 - torsion spring, 34 - positioning groove, 35 - positioning frame, 36 - first spring, 37 - abutting plate, 38 - cam, 39 - positioning rod, 40 - dust cleaning guide rod, 41 - scraper, 42 - second spring, 43 - wire winding wheel, 44 - pull rope, 50 - dust shield frame, 51 - dust shield, 52 - dust shield guide rod, 53 - third spring, 54 - touch link, 55 - slideway, 56 - slide bar, 60 - cleaning frame, 61 - slide seat, 62 - cleaning cylinder, 63 - plugging frame, 64 - fourth spring, 65 - unlocking block, 66 - unlocking rod, 67 - telescopic plate, 70 - turntable, 71 - lever, 72 - swing rod, 73 - suction pipe, 80 - motor, 81 - main pulley, 82 - sub - pulley, 83 - transmission belt. Detailed implementation manners

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

[0035] Embodiment 1: A dynamic back - blowing bag - type dust removal device based on dust induction, as Figures 1 - 3As shown in the figure, it includes a dust removal box 10, filter bags 11, a clean gas box 12, ash hoppers 20, an intake pipe 21, a partition plate 22, a sealing plate 23 and a dynamic backwashing mechanism. A plurality of through holes communicating with the outside are arranged in an array on the top wall of the dust removal box 10, and a filter bag 11 is fixedly installed in each through hole. The installation method of the filter bag 11 can refer to the pulse dust removal equipment in the prior art. Two independent clean gas boxes 12 are symmetrically fixedly connected to the top of the dust removal box 10. A clean gas outlet for the discharged air after dust removal is provided on the clean gas box 12. The filter bags 11 on the dust removal box 10 are divided into two groups, and the two groups of filter bags 11 are correspondingly arranged below the two clean gas boxes 12. A partition plate 22 is fixedly connected to the inner top wall of the dust removal box 10, and the front and rear ends of the partition plate 22 are fixedly connected to the front and rear side walls of the dust removal box 10. The partition plate 22 is located on the axis of symmetry of the two groups of filter bags 11. The partition plate 22 is used to symmetrically divide the inside of the dust removal box 10 into two dust removal spaces. Two ash hoppers 20 are symmetrically fixedly connected to the bottom of the dust removal box 10. Each ash hopper 20 is located below one dust removal space. An intake pipe 21 is fixedly connected to each ash hopper 20 in a communicating manner. Each intake pipe 21 is independently connected to a dust-containing space that needs to be dust-removed. There is a gap between the partition plate 22 and the ash hopper 20 below, so that when the dust removal work in a certain dust removal space stops, the dust-containing gas input by the intake pipe 21 below this dust removal space can enter another normally operating dust removal space. Two sealing plates 23 are rotatably connected symmetrically on the left and right in 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 close the corresponding dust removal space, to prevent dust from continuing to enter the dust removal space that has stopped dust removal work when the dust removal work in a certain dust removal space stops, and to prevent the dust in the dust removal space that has stopped dust removal work from being carried by the air flow into another normally operating dust removal space. A dynamic backwashing mechanism is installed on the dust removal box 10. The dynamic backwashing mechanism can control the spraying pressure and flow rate according to the dust concentration in the dust removal space.

[0036] As Figures 1 - 3As shown, the dynamic backflush mechanism includes an air bag 13, an electric valve 14, a main air pipe 15, a pulse valve 16, an air outlet pipe 17, and a dust concentration sensor 18. The air bag 13 is fixedly installed on the clean air box 12 through brackets. The air bag 13 is an air storage tank for storing compressed gas in a pulse bag dust collector in the prior art. The air outlet ends of the air bag 13 are fixedly installed with electric valves 14. The electric valves 14 are electric ball valves. The air outlet ends of the electric ball valves are connected and fixed to the main air pipe 15 in a communicating manner. Eight pulse valves 16 are connected and fixed to the main air pipe 15 at equal intervals. The air outlet ends of the pulse valves 16 are connected and fixed to the blowing pipelines for cleaning the filter bags 11. The blowing pipelines extend into the corresponding clean air boxes 12. A plurality of nozzles are connected and fixed to the blowing pipelines at equal intervals. Each nozzle corresponds to a filter bag 11. The air outlet pipes 17 are fixedly installed on the two clean air boxes 12. The clean air outlet of the clean air box 12 is internally connected to the air outlet pipe 17. When manufacturing this equipment, a valve needs to be installed on the clean air box 12 or the air outlet pipe 17. The valve is used to control the connection between the clean air box 12 and the air outlet pipe 17. From Figure 2 it can be seen that two dust concentration sensors 18 are symmetrically fixedly installed on the lower sides of the left and right side walls of the partition plate 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 device, connect an external fan to the air outlet pipe 17 to provide negative pressure inside the dust removal box 10. Then connect the dusty space that needs dust removal to the air inlet pipe 21 through a pipeline, and each air inlet pipe 21 corresponds to a separate dusty space. Then transport the dusty gas through the air inlet pipe 21 into the dust removal box 10. The dusty gas will pass through the filter bag 11 under the action of negative pressure and enter the clean air box 12, and then be discharged through the air outlet pipe 17. When it is necessary to clean, maintain or replace the filter bag 11 in one of the dust removal spaces, first block the connection between the air inlet pipe 21 and the clean air box 12 through the valve installed on the clean air box 12, and then control the corresponding sealing plate 23 below the dust removal space to rotate to a horizontal state, so that the dusty gas can no longer enter the dust removal space during the cleaning, maintenance or replacement process. This can not only prevent the dusty gas from interfering with the cleaning, maintenance or replacement work, but also prevent the air flow fluctuation during cleaning from interfering with the normal operation of another dust removal space. And the dusty gas entering the air inlet pipe 21 below this dust removal space will enter another dust removal space under the action of negative pressure. At this time, the dusty gases in both air inlet pipes 21 will be dust-removed in another normally operating dust removal space, so as to continuously dust-remove the dusty gases in the two dusty spaces, and avoid the situation that the dusty gas in the corresponding dusty space cannot be continuously cleaned due to shutdown, resulting in environmental pollution or affecting the normal production process. After the cleaning, maintenance or replacement is completed, then control the sealing plate 23 to rotate and open. The dust concentration sensor 18 is used to detect the dust concentration in the corresponding dust removal space. The dust concentration sensor 18 will transmit the detected dust concentration signal to the DCS system. The DCS system calculates the appropriate valve opening according to the control logic. After the DCS system calculates, it will send a control signal to the electric actuator of the electric ball valve. The electric actuator drives the valve body to rotate. When the dust concentration increases, the valve opening of the electric ball valve increases to increase the pressure and flow rate of the compressed air to meet the cleaning requirements. When the dust concentration decreases, the valve opening of the electric ball valve decreases to reduce the spraying pressure and flow rate. After controlling the adjustment of the electric ball valve, the DCS system then controls the pulse valve 16 to open for spraying operation to achieve precise adjustment of the spraying pressure and flow rate. After the pulse valve 16 is opened, the high-pressure gas sprays the filter bag 11 through the spraying pipeline. The spraying direction of the high-pressure gas is opposite to the flowing direction of the dusty gas during dust removal, so as to blow the dust particles on the filter bag 11 towards the direction of the sealing plate 23.

[0038] Embodiment 2: On the basis of Embodiment 1, as Figure 1 , Figure 4 , Figure 5 and Figure 6As shown in the figure, it further includes a locking mechanism for controlling the rotation of the sealing plate 23. The locking mechanism is installed in the dust removal box 10 and includes a transmission shaft 30, a main gear 31, a sub-gear 32, a torsion spring 33, a positioning frame 35, a first spring 36, a pressing plate 37, a cam 38 and a positioning rod 39. Two transmission shafts 30 are symmetrically and rotatably connected in the dust removal box 10, and the transmission shafts 30 are arranged in parallel above the sealing plate 23 on the same side. It can be seen from the following that a main gear 31 is fixedly connected to the transmission shaft 30, and a sub-gear 32 that cooperates with the main gear 31 is rotatably connected to the rotating shaft of the sealing plate 23. Both the main gear 31 and the sub-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 sub-gear 32. A positioning groove 34 is opened at one end of the sealing plate 23 close to the side wall of the dust removal box 10. Two positioning frames 35 are symmetrically and slidably connected in the dust removal box 10. Three positioning rods 39 are fixedly connected at equal intervals on the side of the positioning frame 35 close to the sealing plate 23. When the sealing plate 23 rotates to the horizontal state, the positioning rod 39 will be inserted into the positioning groove 34 to limit the rotation of the sealing plate 23. A first spring 36 is sleeved on the guide rod of the positioning frame 35, and the first spring 36 is used to push the positioning frame 35 towards the sealing plate 23. A pressing plate 37 is fixedly connected to the positioning frame 35, and the upper end of the pressing plate 37 is an inclined surface. A cam 38 is rotatably connected to the transmission shaft 30 through a one-way bearing, and the cam 38 is used to push the pressing plate 37 to drive the positioning rod 39 out of the positioning groove 34. Figure 5 Taking the left sealing plate 23 as an example, when it is necessary to rotate the sealing plate 23 to the horizontal state, control the left transmission shaft 30 to drive the main gear 31 to rotate clockwise. The main gear 31 will engage with the sub-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 squeeze the positioning frame 35 in the away direction, and the first spring 36 will be compressed. When the sealing plate 23 rotates to the horizontal state, the first spring 36 pushes the positioning frame 35 close to the sealing plate 23, so that the positioning rod 39 is inserted into the positioning groove 34, thereby keeping the sealing plate 23 closed to the dust removal space and preventing the teeth of the main gear 31 and the sub-gear 32 from being stressed for a long time, which may reduce the service life. The cam 38 is installed on the transmission shaft 30 through a one-way bearing. When the left transmission shaft 30 rotates clockwise, no force will be applied to the cam 38. When the transmission shaft 30 rotates counterclockwise, it will drive the cam 38 to rotate synchronously. The cam 38 will squeeze the pressing plate 37 and drive the positioning frame 35 to move away from the sealing plate 23 through the pressing plate 37, so that the positioning rod 39 is removed from the positioning groove 34, thereby enabling the sealing plate 23 to rotate clockwise to reset.

[0039] Taking the left sealing plate 23 as an example, when it is necessary to rotate the sealing plate 23 to the horizontal state, control the left transmission shaft 30 to drive the main gear 31 to rotate clockwise. The main gear 31 will engage with the sub-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 squeeze the positioning frame 35 in the away direction, and the first spring 36 will be compressed. When the sealing plate 23 rotates to the horizontal state, the first spring 36 pushes the positioning frame 35 close to the sealing plate 23, so that the positioning rod 39 is inserted into the positioning groove 34, thereby keeping the sealing plate 23 closed to the dust removal space and preventing the teeth of the main gear 31 and the sub-gear 32 from being stressed for a long time, which may reduce the service life. The cam 38 is installed on the transmission shaft 30 through a one-way bearing. When the left transmission shaft 30 rotates clockwise, no force will be applied to the cam 38. When the transmission shaft 30 rotates counterclockwise, it will drive the cam 38 to rotate synchronously. The cam 38 will squeeze the pressing plate 37 and drive the positioning frame 35 to move away from the sealing plate 23 through the pressing plate 37, so that the positioning rod 39 is removed from the positioning groove 34, thereby enabling the sealing plate 23 to rotate clockwise to reset.

[0040] As Figure 4 、 Figure 7 and Figure 8As shown in the figure, it further includes a shielding mechanism for preventing blockage of the blowing pipeline. The shielding mechanism is located on both sides of the partition plate 22. The shielding mechanism includes a dust blocking frame 50, a dust blocking plate 51, a dust blocking guide rod 52, a third spring 53, a touch link rod 54 and a sliding rod 56. A dust blocking frame 50 is fixedly connected inside each clean air box 12. A plurality of through holes are arranged in an array on the dust blocking frame 50. A dust blocking plate 51 is rotatably connected in each through hole. The dust blocking plate 51 is used to shield the air outlet end of the nozzle in the blowing pipeline. The dust blocking plates 51 in the same vertical column correspond to the blowing pipelines on one pulse valve 16. There are a total of eight vertical columns of dust blocking plates 51 in each clean air box 12, and the dust blocking plates 51 in the same vertical column are fixedly connected to the same rotating shaft, so that the dust blocking plates 51 in the same vertical column can rotate synchronously. Two groups of dust blocking guide rods 52 are symmetrically and slidably connected to the partition plate 22. Each group of dust blocking guide rods 52 has eight. A touch link rod 54 is slidably connected to the same group of dust blocking guide rods 52. The two touch link rods 54 are symmetric about the partition plate 22. Eight horizontal and equidistant sliding grooves 55 are arranged on the upper side of the touch link rod 54 in a linear shape. The end of the rotating shaft of the dust blocking plates 51 in the same vertical column is fixedly connected with a sliding rod 56, and the sliding rod 56 is located at an eccentric position. Each sliding rod 56 is slidably arranged in a sliding groove 55, so that when the touch link rod 54 moves up and down, it can drive the dust blocking plate 51 to rotate through the sliding rod 56. From Figure 7 It can be seen that two downwardly extending long rods are symmetrically arranged at the lower end of the touch link rod 54. When the sealing plate 23 rotates to the horizontal state to close the corresponding dust removal space, the sealing plate 23 will push the touch link rod 54 to move upward through the long rods. A third spring 53 for pushing the touch link rod 54 to reset downward is sleeved on the dust blocking guide rod 52.

[0041] During the process of the sealing plate 23 rotating to the horizontal state, it will push the touch link rod 54 on the same side to move upward. When the touch link rod 54 moves upward, it will drive the dust blocking plate 51 to rotate downward and open through the sliding rod 56. The third spring 53 will be compressed, so as to open the through holes on the dust blocking frame 50, so that the nozzles in the blowing pipeline can blow high-pressure gas downward; when the sealing plate 23 resets, the third spring 53 will push the touch link rod 54 to reset downward. When the touch link rod 54 moves downward, it will drive the dust blocking plate 51 to rotate to the horizontal state through the sliding rod 56. The horizontal dust blocking plate 51 will be in contact with the air outlet end of the nozzle, effectively preventing impurities such as dust and oil from entering the inside of the nozzle and reducing the risk of nozzle blockage.

[0042] As Figure 2 and Figure 3As shown in the figure, it further includes a cleaning mechanism for cleaning adhesive dust. The cleaning mechanism is connected to the transmission shaft 30. The cleaning mechanism includes a scraper 41, a dust cleaning guide rod 40, a second spring 42, a wire winding wheel 43 and a pulling rope 44. Two groups of dust cleaning guide rods 40 are symmetrically fixed in the dust removal box 10. Each group of dust cleaning guide rods 40 consists of two rods, and each group of dust cleaning guide rods 40 is located in a dust removal space. A scraper 41 is slidably connected to the same group of dust cleaning guide rods 40. A plurality of 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 for pushing the scraper 41 to reset upward is sleeved on the dust cleaning guide rod 40. A wire winding wheel 43 is fixed on the transmission shaft 30. One end of a pulling rope 44 is fixed on the wire winding wheel 43, and the other end of the pulling rope 44 is fixed to the scraper 41.

[0043] In some special working conditions, dust particles with strong adhesion will be generated. For example, in the steel smelting industry, in the working conditions of blast furnace gas purification and converter flue gas dust removal, the dust has the characteristics of high temperature, high humidity and high viscosity, and it is easy to form an adhesion layer on the surface of the filter bag 11. It is difficult to clean the adhesion layer only by pulse blowing. Therefore, it is necessary to first thin the adhesion layer by scraping, and then clean the remaining adhesion layer by blowing; taking the left transmission shaft 30 as an example, when the left transmission shaft 30 rotates clockwise, it will drive the winding wheel 43 to rotate synchronously, and the winding wheel 43 will reel the wire rope 41 through the winding rope 41. 4 makes the scraper 41 move downward, the second spring 42 will be compressed, the scraper 41 contacts the surface of the filter bag 11, so that the adhesion layer on the surface of the filter bag 11 is scraped off by the scraper 41, and the scraped dust particles will fall down. When the scraper 41 moves to the lower side of the filter bag 11, the spraying will start again; when the left transmission shaft 30 rotates counterclockwise, the second spring 42 will gradually push the scraper 41 to reset upward; because when the left transmission shaft 30 rotates clockwise for one circle, the sealing plate 23 can be rotated to a horizontal state under the action of the main gear 31 and the sub-gear 32, but the transmission shaft 30 needs to rotate clockwise for several circles to The scraper 41 is driven to move downward continuously. Therefore, in order to prevent the equipment from getting stuck, it is necessary to connect the secondary gear 32 and the rotating shaft of the sealing plate 23 through a torsion spring 33. When the sealing plate 23 rotates to a horizontal state and the transmission shaft 30 continues to rotate clockwise, the main gear 31 will drive the secondary gear 32 to continue to rotate 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 secondary gear 32 are disengaged, the torsion spring 33 will drive the secondary gear 32 to rotate clockwise and reset. Similarly, the transmission shaft 30 needs to rotate counterclockwise for several cycles before the scraper 32 is moved back to the original position. The plate 41 can be completely reset upward under the push of the second spring 42. When the sealing plate 23 rotates clockwise to reset and the transmission shaft 30 continues to rotate counterclockwise, the main gear 31 will drive the sub-gear 32 to continue to rotate clockwise to 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 sub-gear 32 are disengaged, the torsion spring 33 will drive the sub-gear 32 to rotate counterclockwise to reset, so that the main gear 31 can engage with the sub-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] Embodiment 3: Based on embodiment 2, Figure 1 , Figure 9 and Figure 10As shown, it further includes a self-cleaning structure for preventing the dust cleaned down from being re-adsorbed. The self-cleaning mechanism is installed on the dust removal box 10. The self-cleaning mechanism includes a cleaning frame 60, a sliding seat 61, a cleaning cylinder 62 and an exhaust pipe 73. Two cleaning frames 60 are symmetrically fixedly connected to the side wall of the dust removal box 10. Each cleaning frame 60 corresponds to a dust removal space. A sliding seat 61 is slidably connected to the cleaning frame 60 in the horizontal direction. An exhaust pipe 73 is fixedly connected to the sliding seat 61. The exhaust pipe 73 is communicated with an external dust suction device. A cleaning cylinder 62 is fixedly connected to the exhaust pipe 73 in a communicating manner. The cleaning cylinder 62 is a hollow shell structure, and 16 through holes for dust suction are symmetrically arranged on the cleaning cylinder 62.

[0045] As Figure 9 and Figure 10 As shown, the self-cleaning mechanism further includes a blocking frame 63, a fourth spring 64, an unlocking block 65 and an unlocking rod 66. A blocking frame 63 is slidably connected to the cleaning cylinder 62 along the length direction. The blocking frame 63 is used to block the dust suction through holes on the cleaning cylinder 62 to prevent blockage. A fourth spring 64 is sleeved on the guide rod of the blocking frame 63. Eight unlocking blocks 65 are fixedly connected to the lower end of the blocking frame 63 at equal intervals. Eight unlocking rods 66 are fixedly connected to the sealing plate 23 at equal intervals. The unlocking rods 66 are used to squeeze the unlocking blocks 65 to drive the blocking frame 63 to cancel the blockage of the cleaning cylinder 62.

[0046] The dust particles on the surface of the filter bag 11 generally have a relatively small density, so they will be adsorbed on the surface of the filter bag 11 under the drive of the air flow. In order to prevent the dust cleaned down from being re-adsorbed into the dust removal space after the sealing plate 23 is opened, it is necessary to clean the dust cleaned down; during the process of the sealing plate 23 rotating to the horizontal state, the unlocking rod 66 will squeeze the unlocking block 65, causing the blocking frame 63 to slide to open the dust suction through holes on the cleaning cylinder 62, and the fourth spring 64 will be compressed, connecting the exhaust pipe 73 with the external dust suction device in advance. After the sealing plate 23 rotates to the horizontal state, start the external dust suction device, so as to discharge the dust particles cleaned down and the dust particles scraped off by the scraper 41; when the sealing plate 23 resets, the unlocking rod 66 is separated from the unlocking block 65, and the fourth spring 64 will push the blocking frame 63 to reset. The reset blocking frame 63 will block the through holes for dust suction on the cleaning cylinder 62 to prevent dust from entering the cleaning cylinder 62 and causing blockage.

[0047] Embodiment 4: On the basis of Embodiment 3, as Figure 1 、 Figure 9 and Figure 12As shown in the figure, it further includes a reciprocating mechanism for expanding the cleaning range of the cleaning cylinder 62. The reciprocating mechanism is connected to the air extraction pipe 73. The reciprocating mechanism includes a turntable 70, a lever 71 and a swing rod 72. Two groups of turntables 70 are symmetrically and rotatably connected to the outer wall of the dust removal box 10. Each group of turntables 70 corresponds to a dust removal space. Each group of turntables 70 has two, and one of the turntables 70 is rotatably connected to the outer wall of the dust removal box 10. The eccentric positions of the two turntables 70 are fixedly connected with a lever 71. A swing rod 72 is fixedly connected to the air extraction pipe 73. A linear chute is formed on the swing rod 72, and the lever 71 is slidably connected to the linear chute on the swing rod 72.

[0048] As Figure 1 and Figure 12 shown in the figure, it further includes a dual-drive mechanism for driving the rotation of the turntable 70 and the transmission shaft 30. The dual-drive mechanism includes a motor 80, a main pulley 81, a secondary pulley 82 and a transmission belt 83. Two motors 80 are symmetrically and fixedly connected to the outside of the dust removal box 10 through brackets. Main pulleys 81 are fixedly connected to the output shafts of the motors 80. The main pulley 81 is fixedly connected to one of the turntables 70 away from the dust removal box 10. One end of the transmission shaft 30 passes through the side wall of the dust removal box 10, and a secondary pulley 82 is fixedly connected to this end of the transmission shaft 30. The main pulley 81 and the secondary pulley 82 on the same side are jointly wound with a transmission belt 83.

[0049] As Figure 1 shown in the figure, it further 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 sliding 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 sealing structure.

[0050] When the motor 80 rotates, it will drive the turntable 70 to rotate. When the turntable 70 rotates, it will drive the sliding seat 61 to reciprocate through the lever 71, the swing rod 72 and the air extraction pipe 73, so as to drive the cleaning cylinder 62 to reciprocate to expand the dust suction area and improve the self-cleaning effect. The telescopic plate 67 can freely expand and contract with the movement of the sliding seat 61 to prevent external gas from directly entering the dust removal box 10 through the cleaning frame 60; when the motor 80 rotates, it will also drive the transmission shaft 30 through the main pulley 81, the secondary pulley 82 and the transmission belt 83, so as to drive the sealing plate 23 to rotate to the horizontal state and drive the scraper 41 to move downward.

[0051] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A dynamic back-blowing bag dust removal device based on dust induction, comprising a dust removal box (10), a filter bag (11) installed in the dust removal box (10), characterized in that: The dust collecting box (10) is fixedly connected with two clean air boxes (12) for discharging the gas after dust removal. A partition (22) is fixedly connected inside the dust collecting box (10). The filter bags (11) in the dust collecting box (10) are divided into two groups by the partition (22) so as to divide the inside of the dust collecting box (10) into two dust collecting spaces, and the lower sides of the two dust collecting spaces are connected. The dust collecting box (10) is fixedly connected with two ash hoppers (20). The ash hoppers (20) are connectedly fixed with air inlet pipes (21). Each air inlet pipe (21) is separately connected to a dust-containing space that needs to be dust removed. The dust collecting box (10) is rotatably connected with a sealing plate (23). The sealing plate (23) is used to seal the corresponding dust collecting space for easy cleaning and maintenance. The dust collecting box (10) is installed with a dynamic backflush mechanism. The dynamic backflush mechanism can control the pressure and flow of the spray according to the dust concentration in the dust collecting space.

2. The dynamic back-blowing bag dust removal equipment based on dust induction according to claim 1 is characterized in that: The dynamic back-blowing mechanism comprises an air bag (13), the air bag (13) is fixedly mounted on the clean air box (12), an electric valve (14) is fixedly mounted on the air outlet end of the air bag (13), the air outlet end of the electric valve (14) is connected and fixedly connected to a main air pipe (15), a plurality of pulse valves (16) are fixedly connected to the main air pipe (15), a spray pipeline for cleaning the filter bag (11) is mounted on the pulse valve (16), a plurality of nozzles are fixedly connected to the spray pipeline, an air outlet pipe (17) is connected and fixedly connected to the clean air box (12), a dust concentration sensor (18) is fixedly connected to the partition (22), and 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.

3. The dynamic back-blowing bag dust removal equipment based on dust induction according to claim 1 is characterized in that: The invention also comprises a locking mechanism for controlling the rotation of the sealing plate (23), the locking mechanism comprising a transmission shaft (30), the transmission shaft (30) being rotatably connected in the dust removal box (10), a main gear (31) being fixedly connected to the transmission shaft (30), a sub-gear (32) cooperating with the main gear (31) being rotatably connected to the rotating shaft of the sealing plate (23), a torsion spring (33) being connected between the sub-gear (32) and the sealing plate (23), a positioning groove (34) being provided on the sealing plate (23), a positioning frame (35) being slidably connected in the dust removal box (10), a positioning rod (39) being fixedly connected to the positioning frame (35) cooperating with the positioning groove (34) to limit the rotation of the sealing plate (23), a No. 1 spring (36) being sleeved on the guide rod of the positioning frame (35), a cam (38) being rotatably connected to the transmission shaft (30), the cam (38) being used for driving the positioning rod (39) to move out of the positioning groove (34) by extrusion.

4. The dynamic back-blowing bag dust removal equipment based on dust induction as claimed in claim 2 is characterized by: The utility model also comprises a shielding mechanism for preventing the spraying pipeline from being blocked, the shielding mechanism comprising a dust shielding frame (50), the dust shielding frame (50) being fixedly connected in the clean air box (12), a dust shielding plate (51) being rotatably connected to the dust shielding frame (50), the dust shielding plate (51) being used for shielding the air outlet end of the spray head in the spraying pipeline, a triggering link (54) being slidably connected to the partition plate (22) through a dust shielding guide rod (52), a slideway (55) being provided on the triggering link rod (54), a sliding rod (56) being fixedly connected to the end of the rotating shaft of the dust shielding plate (51), and the sliding rod (56) being slidably arranged in the slideway (55), the sealing plate (23) being able to push the triggering link rod (54) to move during the rotation process, so as to drive the dust shielding plate (51) to rotate through the triggering link rod (54), and a No. 3 spring (53) being sleeved on the dust shielding guide rod (52) for pushing the triggering link rod (54) to reset.

5. The dynamic back-blowing bag dust removal equipment based on dust induction as claimed in claim 3 is characterized by: The invention also comprises a cleaning mechanism for cleaning adhesive dust, the cleaning mechanism comprising a cleaning guide rod (40), the cleaning guide rod (40) being fixedly connected in the dust removal box (10), a scraper (41) being slidably connected to the cleaning guide rod (40), a plurality of circular scrapers being arranged on the scraper (41), and the circular scraper sleeves being arranged on the surface of the filter bag (11), a second spring (42) being sleeved on the cleaning guide rod (40) for pushing the scraper (41) to reset, a winding wheel (43) being fixedly connected to the transmission shaft (30), and a pull rope (44) being connected between the winding wheel (43) and the scraper (41).

6. The dynamic back-blowing bag dust removal equipment based on dust induction as claimed in claim 3 is characterized by: The invention also comprises a self-cleaning structure for preventing the cleaned dust from being re-adsorbed, wherein the self-cleaning mechanism comprises a cleaning frame (60), the cleaning frame (60) is fixedly connected to the dust removal box (10), an exhaust pipe (73) is slidably connected to the cleaning frame (60) via a sliding seat (61), the exhaust pipe (73) is connected to an external dust collection device, a cleaning cylinder (62) is fixedly connected to the exhaust pipe (73), the cleaning cylinder (62) is located in the dust removal box (10), and a through hole for dust collection is provided on the cleaning cylinder (62).

7. The dynamic back-blowing bag dust removal equipment based on dust induction according to claim 6 is characterized in that: The self-cleaning mechanism also includes a blocking frame (63), the blocking frame (63) is slidably connected to the cleaning cylinder (62), the blocking frame (63) is used to block the dust suction through hole on the cleaning cylinder (62) to prevent clogging, a No. 4 spring (64) is sleeved on the guide rod of the blocking frame (63), an unlocking block (65) is fixedly connected to the blocking frame (63), and an unlocking rod (66) is fixedly connected to the sealing plate (23), and the unlocking rod (66) is used to squeeze the unlocking block (65) to drive the blocking frame (63) to cancel the blocking of the cleaning cylinder (62).

8. The dynamic back-blowing bag dust removal equipment based on dust induction according to claim 6, characterized in that: The utility model also comprises a reciprocating mechanism for expanding the cleaning range of the cleaning cylinder (62), the reciprocating mechanism comprising a rotating disk (70), the rotating disk (70) being rotatably connected to the dust removal box (10), a lever (71) being fixedly connected to an eccentric position of the rotating disk (70), a swing rod (72) being fixedly connected to an exhaust pipe (73), the lever (71) being slidably connected to a slide groove on the swing rod (72), so that when the rotating disk (70) rotates, the sliding seat (61) can be driven to reciprocate through the lever (71) and the swing rod (72).

9. The dynamic back-blowing bag dust removal equipment based on dust induction according to claim 8, characterized in that: The invention also comprises a dual-drive mechanism for driving the rotating disk (70) and the transmission shaft (30) to rotate, wherein the dual-drive mechanism comprises a motor (80), the motor (80) is fixedly connected to the dust removal box (10), a main belt pulley (81) is fixedly connected to the output shaft of the motor (80), the main belt pulley (81) is fixedly connected to the rotating disk (70), a secondary belt pulley (82) is fixedly connected to the transmission shaft (30), and a transmission belt (83) is wound around the main belt pulley (81) and the secondary belt pulley (82).

10. The dynamic back-blowing bag dust removal equipment based on dust induction according to claim 8, characterized in that: It also includes a telescopic plate (67) for preventing dust from entering the dust removal box (10) through the cleaning frame (60); the telescopic plate (67) is slidably connected to the cleaning frame (60).

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