Coal-fired power generation dust removal device

Abstract

The utility model relates to a coal-fired power generation dust removal device belongs to dust removal device technical field, in order to solve the pulse instant injection pressure makes filter bag rapid expansion, high -frequency vibration, can lead to fiber fatigue fracture, and lead to bag mouth and bag cage junction fracture, simultaneously long filter bag pulse, bag bottom energy attenuation, the effect of middle and lower part ash removal will be poor problem, the dust remover is connected with the air inlet pipe on one side, the inside fixed mounting of dust remover has a plurality of dust removal bag, the dust removal bag of the utility model can resist the stress of the outward expansion of the dust removal bag when subjected to the outward expansion force of the back flush by the tension of the sliding rod, thereby being favorable for reducing the problem that the fiber fatigue fracture is caused by the back flush expansion of the dust removal bag, simultaneously, after the dust removal bag is pulled in tightly, the possibility that the dust removal bag and the support bag cage junction fracture can also be reduced, thereby improving the stability of the dust removal bag during use, guaranteeing the service life of the dust removal bag.

Description

Technical Field

[0001] This invention relates to the field of dust removal equipment technology, specifically a dust removal device for coal-fired power generation. Background Technology

[0002] Dust removal devices for coal-fired power plants are high-efficiency dust removal equipment used for flue gas purification in coal-fired power plants. They intercept dust particles in the flue gas through a filter layer made of high-temperature resistant fiber material. The particles are trapped on the surface of the filter bag, and the purified gas is discharged. It is a commonly used dust removal method in coal-fired power generation.

[0003] In current coal-fired power plant baghouse dust collectors, the instantaneous jet pressure of the pulse valve during pulse backflushing dust suppression causes the bag to expand rapidly and vibrate at high frequency. Over time, this can easily lead to fiber fatigue and breakage in the bag. At the same time, the rapid expansion of the bag can cause stress concentration at the connection between the bag and the cage, which may result in breakage at the connection. In addition, the pulse cleaning of long filter bags in coal-fired power plants suffers from energy attenuation at the bottom of the bag, weak cleaning in the middle and lower parts, and dust accumulation, which leads to a deterioration in the effectiveness of pulse cleaning.

[0004] To address the above problems, a dust removal device for coal-fired power generation is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a dust removal device for coal-fired power generation. By using this device, the problems mentioned above can be solved, such as the rapid expansion and high-frequency vibration of the filter bag caused by the instantaneous pulse jet pressure leading to fiber fatigue and breakage, as well as the breakage at the connection between the bag opening and the bag cage. Additionally, during long filter bag pulses, the energy at the bottom of the bag decreases and the cleaning effect in the middle and lower parts deteriorates.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dust removal device for coal-fired power generation, comprising a dust collector and an air inlet pipe connected to one side of the dust collector, wherein a plurality of dust collection bags are fixedly installed inside the dust collector, and a supporting bag cage is fixed inside the dust collection bag and the supporting bag cage is fixed inside the dust collector, wherein a dust discharge pipe is connected to the bottom of the dust collector and an exhaust pipe is connected to the upper side of the dust collector. The dust collector is internally connected to several backflush pipes, each including an air jet ring disposed on the top of several dust bags. An inflation mechanism is fixed to the inner center of each set of dust bags, and a diversion pipe is connected above each inflation mechanism. One side of the diversion pipe is connected to an air supply pipe, and a solenoid valve is installed in the middle of the air supply pipe. A fixing mechanism is annularly arranged around the inflation mechanism, and several sets of fixing mechanisms are fixed above and below the inner surface of the dust bags. Several air outlets are annularly opened on the bottom outer surface of the inflation mechanism, and a gas collection hood is fixedly fitted onto the lower part of the inflation mechanism. The inflation mechanism is connected to the gas collection hood through the air outlets, and an internal flushing mechanism is annularly connected to the outer surface of the gas collection hood.

[0007] Furthermore, the inflation mechanism includes a venting chamber connected to the diversion pipe, and a variable diameter ring is fixed inside the venting chamber, wherein the inner diameter of the variable diameter ring is smaller than the inner diameter of the venting chamber.

[0008] Furthermore, a piston seat is slidably installed inside the variable diameter ring, and support springs are fixed on both sides of the piston seat. The piston seat is elastically connected to the variable diameter ring through the support springs.

[0009] Furthermore, a plurality of rotating tie rods are rotatably mounted on the upper surface of the piston seat, and a sliding rod is rotatably mounted on one side of the top of each set of rotating tie rods, and the sliding rod and the variable diameter ring are slidably sealed together.

[0010] Furthermore, the fixing mechanism includes a fixing seat fixed to the inner surface of the dust collector bag, and a connecting spring is fixed inside the upper part of the fixing seat.

[0011] Furthermore, a sliding block is fixed to the bottom of the connecting spring, and the sliding block is elastically connected to the fixed seat through the connecting spring. A limit post is fixed to the bottom of the sliding block, and the sliding block is slidably connected to the fixed seat through the limit post.

[0012] Furthermore, multiple sets of protrusions are fixed on the upper interior of the sliding block, and a pressing block is fixed on the upper end of one end of the sliding rod.

[0013] Furthermore, the internal flushing mechanism includes a vent seat fixedly connected to the outer surface of the gas collection hood, and a rotating seat is fixed to the outside of the vent seat. A rotating head is rotatably installed on one side of the inside of the rotating seat. A limiting block one is fixed to the upper inside of the rotating seat, and a limiting block two is attached to one side of the limiting block one. The limiting block two is fixed to the rotating head.

[0014] Furthermore, a venting rod is fixedly connected to the middle of the front end of the rotating head, and a connecting pipe is fixed to one side of the inside of the rotating head, with one end of the connecting pipe fixed inside the venting seat.

[0015] Furthermore, the front end of the ventilation rod is connected to a jet pipe, and the jet pipe is an arc-shaped pipe. A jet head is arranged in a ring on one side of the surface of the jet pipe, and an inclined guide plate is fixedly installed above the ventilation rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the dust collector bag of the present invention is subjected to the outward expansion force of the backflow, the tensioning of the sliding rod can counteract the outward expansion force of the dust collector bag, thereby helping to reduce the problem of fiber fatigue breakage caused by the backflow expansion of the dust collector bag. At the same time, after the dust collector bag is tightened inward, it can also reduce the possibility of breakage at the connection between the dust collector bag and the support cage, thereby improving the stability of the dust collector bag during use and ensuring the service life of the dust collector bag.

[0017] 2. When the dust bag of the present invention is pulled inward, it will produce a vibration effect on the dust bag, which will help to shake off the dust filtered on the surface of the dust bag, thereby reducing the accumulation of dust on the dust bag, improving the dust reduction effect, and improving the use effect of the dust removal device.

[0018] 3. Before backflushing, the present invention can pre-blow the middle and lower filter sections of the dust collector bag from the inside out, thereby reducing the dust that is most likely to accumulate in the middle and lower sections of the dust collector bag. This avoids the problems of energy attenuation at the bottom of the bag, weak cleaning of the middle and lower parts, and easy accumulation of dust when the dust collector bag pulse cleaning is longer. At the same time, the jet ring will have a swinging effect, which helps to increase the blowing area and improve the dust reduction effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the dust collector of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the dust collector bag of the present invention; Figure 4 This is a schematic diagram of the internal three-dimensional structure of the dust collector bag of the present invention; Figure 5 This is a partial cross-sectional perspective view of the three-dimensional structure of the dust collector bag of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 8 For the present invention Figure 5 Enlarged structural diagram at point C.

[0020] In the diagram: 1. Dust collector; 2. Inlet pipe; 3. Dust bag; 4. Support cage; 5. Backflush pipe; 51. Air jet ring; 6. Diverter pipe; 7. Inflation mechanism; 71. Ventilation chamber; 72. Variable diameter ring; 73. Piston seat; 74. Support spring; 75. Rotating rod; 76. Sliding rod; 8. Fixing mechanism; 81. Fixing seat; 82. Connecting spring; 83. Sliding block; 84. Protrusion; 85. Limiting post; 86. Extrusion block; 9. Internal flushing mechanism; 91. Ventilation seat; 92. Rotating seat; 93. Rotating head; 94. Limiting block one; 95. Limiting block two; 96. Ventilation rod; 97. Connecting pipe; 98. Air jet pipe; 99. Air jet head; 910. Inclined guide plate; 10. Air collection hood; 20. Air outlet; 30. Solenoid valve; 40. Air supply pipe; 50. Exhaust pipe; 60. Dust discharge pipe. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To address the technical challenges of rapid expansion and high-frequency vibration of filter bags caused by pulsed instantaneous blowing pressure, which can lead to fiber fatigue and breakage, as well as breakage at the connection between the bag opening and the cage, such as... Figure 1 - Figure 6 As shown, the following preferred technical solutions are provided: A dust removal device for coal-fired power generation includes a dust collector 1 and an inlet pipe 2 connected to one side of the dust collector 1. The inlet pipe 2 allows the exhaust gas generated by the coal-fired power generation to be introduced into the dust collector 1. Several dust collection bags 3 are fixedly installed inside the dust collector 1. The dust collector 1 is a bag filter commonly used in existing industrial applications. The exhaust gas introduced from the inlet pipe 2 is filtered by the dust collection bags 3, which can separate the dust particles in the exhaust gas. A support bag cage 4 is fixed inside the dust collection bag 3 and is fixed inside the dust collector 1, so that the support bag cage 4 can support and shape the dust collection bag 3 to maintain the normal dust removal effect of the dust collection bag 3. The bottom of the dust collector 1 is connected to a dust discharge pipe 60, and the top side of the dust collector 1 is connected to an exhaust pipe 50. The exhaust gas treated by the dust collection bags 3 will be discharged from the exhaust pipe 50 for further treatment of the exhaust gas. At the same time, the dust particles filtered from the dust collection bags 3 will be discharged from the dust collector 1 through the dust discharge pipe 60.

[0023] The dust collector 1 has several backflush pipes 5 connected inside. The backflush pipes 5 are pulse structures commonly used in existing bag dust collectors. The backflush pipes 5 are connected to existing external pulse air supply equipment. The backflush pipes 5 include air jet rings 51 respectively set on the top of several dust bags 3. The backflush pipes 5 use the air jet rings 51 to push the pulse backflush airflow into the dust bags 3, thereby achieving backflush dust removal of the dust bags 3 and allowing the dust filtered on the outer surface of the dust bags 3 to fall.

[0024] Each set of dust collection bags 3 has an inflation mechanism 7 fixed in the middle of its inner side, and each set of inflation mechanisms 7 is connected to a diversion pipe 6 above it. One side of the diversion pipe 6 is connected to an air supply pipe 40, and a solenoid valve 30 is installed in the middle of the air supply pipe 40. The diversion pipe 6 supplies air to the outside of the device, and the air supply pipe 40 is a pipeline that diverts the exhaust gas after it has undergone final treatment and is connected to the existing high-pressure exhaust equipment. This allows the treated clean airflow to be reused and refilled into the inflation mechanism 7 by opening the solenoid valve 30, thereby realizing energy utilization and reducing the consumption problem of setting up a separate external air supply equipment.

[0025] The outer ring of the inflation mechanism 7 is provided with a fixing mechanism 8, and the fixing mechanism 8 is fixed with several sets of fixtures on the inner surface of the dust collection bag 3. When the backflushing pipe 5 uses the jet ring 51 to backflush the dust collection bag 3, the instantaneous jet pressure of the pulse valve will cause the dust collection bag 3 to expand rapidly and vibrate at high frequency. After a long period of time, the fibers of the dust collection bag 3 are prone to fatigue breakage. At the same time, the rapid expansion of the dust collection bag 3 will cause stress concentration at the connection between the bag and the supporting cage 4, which may cause the connection to break. This will not only significantly shorten the service life of the dust collection bag 3 and increase the downtime replacement and maintenance cost of the dust collection bag 3, but also cause the direct leakage and escape of flue gas and dust, reducing the overall dust collection efficiency.

[0026] Before the backflush pipe 5 uses the jet ring 51 for backflush, the external airflow is first injected into the inflation mechanism 7 through the diversion pipe 6. At this time, the inflation mechanism 7 is continuously inflated. Under the action of air pressure, it will exert a tightening effect on the fixing mechanism 8 towards the center of the dust collector bag 3, so that the dust collector bag 3 can have an inward tightening effect. During backflush, the inflation mechanism 7 continuously exerts a tightening effect on the fixing mechanism 8 and the dust collector bag 3. When the dust collector bag 3 is subjected to the outward expansion force of backflush, the tightening of the dust collector bag 3 by the inflation mechanism 7 and the fixing mechanism 8 can resist the outward expansion force of the dust collector bag 3, thereby helping to reduce the problem of fiber fatigue breakage caused by the backflush expansion of the dust collector bag 3. At the same time, after tightening the dust collector bag 3, it can also reduce the possibility of breakage at the connection between the dust collector bag 3 and the support cage 4.

[0027] The bottom outer surface of the inflation mechanism 7 is provided with several air outlets 20 in a ring shape. A gas collection hood 10 is fixedly fitted onto the lower part of the inflation mechanism 7, and the inflation mechanism 7 is connected to the gas collection hood 10 through the air outlets 20. The gas injected into the inflation mechanism 7 eventually enters the gas collection hood 10 through the air outlets 20. An internal flushing mechanism 9 is connected to the outer ring of the gas collection hood 10. Several sets of internal flushing mechanisms 9 are arranged above and below the gas collection hood 10, so that the airflow entering the gas collection hood 10 will eventually be ejected from the internal flushing mechanism 9. The internal flushing mechanism 9 is located in the lower middle section inside the dust collector bag 3, thus utilizing the internal flushing mechanism... The airflow ejected from structure 9 can pre-blow the middle and lower filter sections of dust bag 3 from the inside out before backflushing, thereby reducing the dust that is most likely to accumulate in the middle and lower sections of dust bag 3. This avoids the problems of energy attenuation at the bottom of the bag, weak cleaning in the middle and lower parts, and easy dust accumulation during long pulse cleaning of dust bag 3, thus improving the effect of subsequent pulse cleaning and ensuring the overall dust removal effect of the device. At the same time, the air filling mechanism 7, fixing mechanism 8 and internal flushing mechanism 9 set in dust bag 3 occupy limited space and have negligible impact on the airflow after dust removal in dust bag 3.

[0028] like Figure 5 and Figure 6As shown, the inflation mechanism 7 includes an air chamber 71 connected to the diversion pipe 6. External air supply from the diversion pipe 6 continuously fills the air chamber 71 from above. A variable diameter ring 72 is fixed inside the air chamber 71, and the inner diameter of the variable diameter ring 72 is smaller than the inner diameter of the air chamber 71. The transition from the air chamber 71 to the variable diameter ring 72 is an arc-shaped gradual change, which results in a pressurization effect when the airflow in the air chamber 71 passes through the variable diameter ring 72, thereby improving the subsequent thrust.

[0029] A piston seat 73 is slidably installed inside the variable diameter ring 72, and support springs 74 are fixed on both sides of the piston seat 73. The piston seat 73 is elastically connected to the variable diameter ring 72 through the support springs 74. When the external airflow continuously fills the ventilation chamber 71, as the air pressure increases, the air pressure will eventually push the piston seat 73 down along the inner diameter of the variable diameter ring 72, causing the piston seat 73 to stretch the support springs 74, thereby opening the bottom of the variable diameter ring 72, so that the airflow can continue to flow downward through the variable diameter ring 72.

[0030] Several rotating pull rods 75 are rotatably mounted on the upper surface of the piston seat 73, and a sliding rod 76 is rotatably mounted on one side of the top of each set of rotating pull rods 75. The sliding rod 76 is slidably sealed with the variable diameter ring 72, so that no gas leakage occurs when the sliding rod 76 slides on the variable diameter ring 72. When the air pressure pushes the piston seat 73 down along the inner diameter of the variable diameter ring 72, the piston seat 73 will use the rotating pull rods 75 to pull the sliding rod 76 inward into the variable diameter ring 72. The end of the sliding rod 76 away from the rotating pull rod 75 is connected to the fixing mechanism 8, so that when the sliding rod 76 moves, it can fix the fixed mechanism 8. The mechanism 8 and the dust bag 3 have an inward tightening effect. During backflush, the ventilation chamber 71 is continuously filled with air, which causes the sliding rod 76 to continuously tighten the fixing mechanism 8 and the dust bag 3. When the dust bag 3 is subjected to the outward expansion force of backflush, the tightening of the sliding rod 76 can resist the outward expansion force of the dust bag 3, thereby helping to reduce the problem of fiber fatigue breakage caused by backflush expansion of the dust bag 3. At the same time, after the dust bag 3 is tightened inward, it can also reduce the possibility of breakage at the connection between the dust bag 3 and the support cage 4, thereby improving the stability of the dust bag 3 during use and ensuring the service life of the dust bag 3.

[0031] To address the technical problem of reduced dust suppression efficiency caused by direct pulse backflushing due to excessive dust accumulation on the outer surface of filter bags, such as... Figure 4 - Figure 7 As shown, the following preferred technical solutions are provided: like Figure 7As shown, the fixing mechanism 8 includes a fixing seat 81 fixed to the inner surface of the dust bag 3. A connecting spring 82 is fixed to the upper part of the interior of the fixing seat 81. A sliding block 83 is fixed to the bottom of the connecting spring 82. The sliding block 83 is elastically connected to the fixing seat 81 through the connecting spring 82. A limiting post 85 is fixed to the bottom of the sliding block 83. The sliding block 83 is slidably connected to the fixing seat 81 through the limiting post 85. The sliding block 83 can slide up and down in the fixing seat 81 by means of the limiting post 85. At the same time, when the connecting spring 82 is compressed to the maximum extent, the limiting post 85 never disengages from the fixing seat 81, thereby preventing the sliding block 83 from falling out of the fixing seat 81.

[0032] Multiple sets of protrusions 84 are fixed inside the upper part of the sliding block 83. The protrusions 84 have an arc-shaped bottom surface. A pressing block 86 is fixed above one end of the sliding rod 76. The sliding rod 76 can slide within the sliding block 83 by means of the pressing block 86 and will not slip out of the sliding block 83. According to the above, when the sliding rod 76 is driven to move, it will drive the pressing block 86 to slide to the right within the sliding block 83. At this time, the pressing block 86 will continuously pass the protrusions 84. Since the vertical position of the sliding rod 76 cannot be changed, the pressing of the pressing block 86 on the protrusions 84 will cause the sliding block 83 to move upward and compress the connecting spring 82. When the pressing block 86 moves to the rightmost end inside the sliding block 83, it will cause the sliding block 83 to vibrate the fixed seat 81 and the dust bag 3. Thus, when the sliding rod 76 moves, it will produce a vibration effect on the dust bag 3, which will help to vibrate and dislodge the dust filtered on the surface of the dust bag 3, thereby reducing the accumulation of dust on the dust bag 3, improving the dust reduction effect, and improving the use effect of the dust removal device.

[0033] At the same time, after the piston seat 73 moves down to its maximum distance, it pulls the sliding rod 76 to the rightmost end inside the sliding block 83. Then, it continues to pull the sliding block 83 and the fixed seat 81, so that the fixed seat 81 can pull the dust bag 3 slightly inward. This allows the sliding rod 76 to complete the tightening effect on the dust bag 3 mentioned above. Meanwhile, the rebound force of the support spring 74 can satisfy the movement and reset of the piston seat 73 and the sliding rod 76, so that the sliding rod 76 can perform the next vibration and tightening operation.

[0034] To address the technical issues of energy attenuation at the bottom of the filter bag and decreased cleaning efficiency in the middle and lower parts during long filter bag pulse cycles, such as... Figure 4 - Figure 8 As shown, the following preferred technical solutions are provided: like Figure 5As shown, the internal flushing mechanism 9 includes a vent seat 91 fixedly connected to the outer surface of the air collection hood 10, and a rotating seat 92 fixed to the outside of the vent seat 91. A rotating head 93 is rotatably mounted on one side of the inside of the rotating seat 92. A limiting block 94 is fixed to the upper inside of the rotating seat 92, and a limiting block 95 is attached to one side of the limiting block 94. The limiting block 95 is fixed to the rotating head 93. The limiting block 95 and the limiting block 94 can restrict the rotation position of the rotating head 93, so that the rotating head 93 can only rotate counterclockwise within the rotating seat 92 using the limiting block 95. At the same time, in the normal non-rotating state, the limiting block 94 blocks and restricts the limiting block 95, so that the rotating head 93 and its front end remain in a horizontal state.

[0035] A ventilation rod 96 is fixedly connected to the middle of the front end of the rotating head 93, and a connecting pipe 97 is fixed to one side of the inside of the rotating head 93. One end of the connecting pipe 97 is fixed inside the ventilation seat 91, and the middle part of the connecting pipe 97 is a flexible and retractable hose, so that the connecting pipe 97 can deform and stretch normally when the rotating head 93 rotates inside the rotating seat 92.

[0036] The front end of the venting rod 96 is connected to a jet pipe 98, which is an arc-shaped pipe. A jet head 99 is arranged in a ring on one side of the surface of the jet pipe 98. An inclined guide plate 910 is fixedly installed above the venting rod 96. The venting seat 91 is connected to the jet pipe 98 via a connecting pipe 97 and the venting rod 96, so that the airflow that finally fills the air collection hood 10 can be ejected from the jet head 99. Multiple sets of venting seats 91 and inclined guide plates 910 are arranged in a ring from top to bottom around the air collection hood 10, and the jet... The pipe 98 and the jet nozzle 99 are located in the lower middle section inside the dust collector bag 3. The airflow ejected from the jet nozzle 99 can pre-blow the filter position in the lower middle section of the dust collector bag 3 from the inside out before backflushing. This reduces the dust that is most likely to accumulate in the lower middle section of the dust collector bag 3, and avoids the problems of energy attenuation at the bottom of the bag, weak cleaning in the lower middle section, and easy dust accumulation during long pulse cleaning of the dust collector bag 3. This helps to improve the effect of subsequent pulse cleaning and ensure the dust removal effect of the overall device.

[0037] Simultaneously, when the jet nozzle 99 sprays air vertically onto the inner surface of the dust bag 3, the reaction force of the airflow and the upward lift of the filtered airflow inside the dust bag 3 work together on the inclined guide plate 910, causing the inclined guide plate 910 to be pushed upward. This results in a counter-clockwise upward rotation of the jet pipe 98, the ventilation rod 96, and the rotating head 93. As the jet nozzle 99 rotates, when the inclined guide plate 910 approaches verticality, the reaction force of the airflow and the lift of the filtered airflow on the inclined guide plate 910 decrease, causing the jet nozzle 99 to rotate back down. To a certain extent, it will be subjected to upward rotation again, which will cause the jet pipe 98 to swing, thereby increasing the dust blowing area and improving the dust reduction effect. By inflating the inflation mechanism 7, the linkage effect of tension protection, vibration dust falling and swinging dust blowing at specific internal positions can be achieved, which can improve the effect and service life of the dust removal device. At the same time, the inflation of the inflation mechanism 7 to achieve the effects of tension protection, vibration dust falling and swinging dust blowing at specific internal positions is carried out before the backflow, thereby achieving the tensioning operation in advance and avoiding the influence of the backflow airflow.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for coal-fired power generation, comprising a dust collector (1) and an air inlet pipe (2) connected to one side of the dust collector (1), wherein a plurality of dust collection bags (3) are fixedly installed inside the dust collector (1), characterized in that: The dust collector (3) has a support bag cage (4) fixed inside, and the support bag cage (4) is fixed inside the dust collector (1). The bottom of the dust collector (1) is connected to a dust discharge pipe (60), and the top side of the dust collector (1) is connected to an exhaust pipe (50). The dust collector (1) is internally connected to several backflush pipes (5). Each backflush pipe (5) includes an air jet ring (51) respectively disposed on the top of several dust collection bags (3). An air inflation mechanism (7) is fixed in the middle of the inner side of each set of dust collection bags (3), and a diversion pipe (6) is connected above each set of air inflation mechanisms (7). One side of the diversion pipe (6) is connected to an air supply pipe (40), and a solenoid valve (30) is installed in the middle of the air supply pipe (40). The air inflation mechanism... (7) has a fixing mechanism (8) on its outer ring, and the fixing mechanism (8) has several sets of fixings on the inner surface of the dust bag (3). The bottom outer surface of the inflation mechanism (7) has several air outlets (20) on its ring, and the lower part of the inflation mechanism (7) is fixedly fitted with an air collection hood (10). The inflation mechanism (7) is connected to the air collection hood (10) through the air outlets (20). The outer ring of the air collection hood (10) is connected to an internal inflation mechanism (9). The inflation mechanism (7) includes a venting chamber (71) connected to the diversion pipe (6). A variable diameter ring (72) is fixed inside the venting chamber (71), and the inner diameter of the variable diameter ring (72) is smaller than the inner diameter of the venting chamber (71). A piston seat (73) is slidably installed inside the variable diameter ring (72), and support springs (74) are fixed on both sides of the piston seat (73). The piston seat (73) is elastically connected to the variable diameter ring (72) through the support springs (74). The piston seat (73) has several rotating pull rods (75) rotatably mounted on its upper surface, and each set of rotating pull rods (75) has a sliding rod (76) rotatably mounted on one side of its top. The sliding rod (76) and the variable diameter ring (72) are slidably sealed together. The fixing mechanism (8) includes a fixing seat (81) fixed on the inner surface of the dust bag (3), and a connecting spring (82) is fixed on the upper inside of the fixing seat (81). The bottom of the connecting spring (82) is fixed with a sliding block (83), and the sliding block (83) is elastically connected to the fixed seat (81) through the connecting spring (82). The bottom of the sliding block (83) is fixed with a limit post (85), and the sliding block (83) is slidably connected to the fixed seat (81) through the limit post (85). Multiple sets of protrusions (84) are fixed on the upper part of the sliding block (83), and a pressing block (86) is fixed on the upper part of one end of the sliding rod (76).

2. The dust removal device for coal-fired power generation according to claim 1, characterized in that: The internal flushing mechanism (9) includes a vent seat (91) fixedly connected to the outer surface of the air collection hood (10), and a rotating seat (92) is fixed to the outside of the vent seat (91). A rotating head (93) is rotatably installed on one side of the inside of the rotating seat (92). A limiting block one (94) is fixed on the upper inside of the rotating seat (92), and a limiting block two (95) is attached to one side of the limiting block one (94). The limiting block two (95) is fixed on the rotating head (93).

3. The dust removal device for coal-fired power generation according to claim 2, characterized in that: The front end of the rotating head (93) is fixedly connected to a ventilation rod (96), and a connecting pipe (97) is fixed on one side of the inside of the rotating head (93), and one end of the connecting pipe (97) is fixed inside the ventilation seat (91).

4. The dust removal device for coal-fired power generation according to claim 3, characterized in that: The front end of the ventilation rod (96) is connected to a jet pipe (98), and the jet pipe (98) is an arc-shaped pipe. A jet head (99) is arranged in a ring on one side of the surface of the jet pipe (98). An inclined guide plate (910) is fixedly arranged above the ventilation rod (96).

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