Negative pressure bag-type dust collector and method for simultaneous desulfurization and denitrification of industrial silicon flue gas

Abstract

The application discloses a negative pressure bag-type dust collector and a method thereof for synchronous desulfurization and denitrification of industrial silicon flue gas, and belongs to the technical field of bag-type dust collectors. The dust collector shell is symmetrically provided with a lower air inlet and an upper air outlet on two sides, and is provided with an ash discharge pipe at the bottom end. The dust collector shell is supported by a support, and is internally provided with a dust removal assembly, a negative pressure assembly and a desulfurization and denitrification assembly. The negative pressure bag-type dust collector and the method thereof for synchronous desulfurization and denitrification of industrial silicon flue gas are characterized in that the forward rotation of the fan shaft can realize the extraction of the gas in the dust collector shell and the discharge of the gas from the upper air outlet, which is beneficial to the rising of the flue gas, and the rising of the vibration component can be separated from the contact with the hanger. The reverse rotation of the fan shaft can make the vibration component contact with the hanger, so as to shake off the dust on the filter bag. When the filter bag is shaken, the rising of the shaken dust can be inhibited, and the two functions can be mutually matched and assisted.

Description

Technical Field

[0001] This invention relates to the field of baghouse dust collector technology, and in particular to a negative pressure baghouse dust collector and method for simultaneous desulfurization and denitrification of industrial silicon flue gas. Background Technology

[0002] Regarding baghouse dust collectors for flue gas desulfurization and denitrification, Chinese Patent Publication (Announcement) No. CN217549293U discloses a semi-dry baghouse dust collector for flue gas desulfurization and denitrification, including a baghouse dust collector body and a filter bag frame. The filter bag frame is installed inside the baghouse dust collector body, and a dust gas inlet and a dust gas outlet are opened on the outer surface of the baghouse dust collector body. A dust discharge device is installed at the lower end of the baghouse dust collector body. A filter screen is connected inside the dust gas inlet, and a control shaft runs through the inside of the filter screen. A sleeve is sleeved on the outer surface of the control shaft, and a baffle is connected to the outer surface of the sleeve.

[0003] Although the aforementioned patent can solve the problems of baghouse dust collectors used in semi-dry flue gas desulfurization and denitrification, such as the inconvenience of adjusting the dust gas flow rate at the dust gas inlet, which makes it impossible to ensure the stable operation of desulfurization and denitrification, and the dust gas inlet being easily blocked by impurities, thus affecting the efficiency of desulfurization and denitrification, and the inconvenience of quickly collecting the discharged ash after desulfurization and denitrification, and the discharge ash being prone to flying, thus causing environmental pollution, the following technical defects still exist.

[0004] The rotary control shaft only changes the flow rate of dust gas at the dust inlet, without providing equipment for accelerating the rise through negative pressure or removing dust from the filter bags. In addition, the existing equipment only adds a fan and pulse-type dust shaking, but the two devices are not linked and have independent structures, making them unable to be used together. Summary of the Invention

[0005] The purpose of this invention is to provide a negative pressure bag filter and method for simultaneous desulfurization and denitrification of industrial silicon flue gas, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure bag filter for simultaneous desulfurization and denitrification of industrial silicon flue gas, comprising a lower air inlet and an upper exhaust outlet respectively arranged on both sides of the dust collector shell, an ash discharge pipe arranged at the bottom of the dust collector shell, the dust collector shell being supported by a bracket, and a dust collection component, a negative pressure component and a desulfurization and denitrification component arranged inside the dust collector shell, the negative pressure component being located above the dust collection component and connected to the upper exhaust outlet, and the desulfurization and denitrification component being located below the dust collection component.

[0007] Furthermore, the dust removal assembly includes a suspension component and a filter bag component. The suspension component is mounted on the dust collector housing and is connected to the filter bag component.

[0008] Furthermore, the suspension components include a hanger, a suspension frame, crossbars, and longitudinal bars. One end of the hanger is fixed to the top wall of the dust collector housing with bolts, and the other end of the hanger is connected to the suspension frame. Several crossbars and longitudinal bars are vertically and alternately fixed to the suspension frame.

[0009] The filter bag assembly includes a limiting ring, a top plate, warp reinforcing ribs, a bottom ring, and a filter bag. Several warp reinforcing ribs are arranged in a ring to form an outer frame, and their two ends are connected to the top plate and the bottom ring, respectively. The limiting ring is fixed to the inside of the outer frame, and the top plate is fixed to the connection points of the connecting rods with the horizontal and vertical rods.

[0010] The filter bag has an opening for the bottom ring to be inserted and fitted onto the outer frame, and the side circumference of the top plate is fixed to the filter bag.

[0011] Furthermore, the filter bag has an open structure at both ends, and the pore size of the filter bag does not exceed 1mm.

[0012] Furthermore, the negative pressure assembly includes a negative pressure fan, a fan shaft, an exhaust pipe, a support frame, and a servo motor. The support frame is located inside the dust collector housing on the side of the upper exhaust port. The servo motor is mounted on the support frame. The shaft of the servo motor is connected to one end of the fan shaft, and the other end of the fan shaft extends to the exhaust pipe embedded in the upper exhaust port.

[0013] A negative pressure fan is installed on the fan shaft, and the negative pressure fan is located above the suspension component. The transmission component connected to the negative pressure fan drives the vibration component to move up and down. When the vibration component descends, it contacts the hanger to shake off the dust on the filter bag. When the vibration component rises, it disengages from the hanger.

[0014] Furthermore, the transmission components include a bevel gear set, a limiting bracket, a transmission screw, a support sleeve, a limiting slider, and a limiting head. The limiting bracket is fixed to the inner wall of the dust collector housing via a support rod. The bearing inside the limiting bracket is penetrated by the smooth part at the top of the transmission screw. One end of the transmission screw meshes with the fan shaft via the bevel gear set. The threaded part in the middle of the transmission screw meshes with the support sleeve, and the transmission screw passes through the support sleeve and is fixed to the limiting head.

[0015] The support sleeve has a strip groove on its side that is engaged by a limiting slider. The limiting slider is fixed to the inner wall of the dust collector housing. The forward or reverse rotation of the fan shaft drives the support sleeve to rise or fall.

[0016] Furthermore, the vibration component includes a vibration motor, a motor platform, and a rotating flexible rod. The motor platform is fixed to the side wall of the support sleeve, and the vibration motor is bolted to the motor platform. The shaft of the vibration motor is connected to the rotating flexible rod.

[0017] Furthermore, a support ring is provided below the transmission screw, and a spring is fixed on the support ring. The spring is sleeved on the transmission screw. As the support sleeve descends, the support sleeve disengages from the threaded part of the transmission screw, and the smooth part below the transmission screw slides into the support sleeve, while the spring abuts against the circumferential surface of the bottom of the support sleeve.

[0018] Furthermore, the desulfurization and denitrification assembly includes a filter frame, a support cover, and a catalyst. One end of the filter frame is inserted into the lower air inlet, and the other end of the filter frame extends into the dust collector housing. The support cover covers the outside of the filter frame, and the catalyst is located inside the support cover.

[0019] Another technology proposed in this invention includes a method for implementing a negative pressure bag filter dust collector for simultaneous desulfurization and denitrification of industrial silicon flue gas, comprising the following steps:

[0020] S1: When the servo motor drives the fan shaft to rotate forward, the negative pressure fan and the transmission screw rotate forward synchronously. When the fan shaft rotates forward, the airflow generated by the fan shaft is directed toward the exhaust pipe, which causes a negative pressure to be generated inside the dust collector housing. This is used to extract the flue gas in the lower air inlet. After being catalyzed by the catalyst, the flue gas rises through the support cover.

[0021] S2: After rising, the part containing dust is absorbed by the filter bag, and the purified gas is discharged from the top exhaust port.

[0022] S3: When the drive screw rotates forward, the support sleeve rises along the limit slider. The support sleeve moves upward from the threaded part of the drive screw to the smooth part above. The rotation direction of the drive screw is the same as the thread direction of the support sleeve. The thread of the drive screw provides support to the support sleeve and does not affect the rotation of the drive screw. When the vibrating part rises, it disengages from the hanger, and the filter bag does not shake.

[0023] S4: When the fan shaft is in reverse, the airflow generated by the fan shaft rotation is directed towards the ash discharge pipe;

[0024] S5: When the drive screw reverses, the support sleeve descends along the limit slider. The rotation direction of the drive screw is opposite to the thread direction of the support sleeve. The drive screw is under gravity, and the support sleeve engages with the thread of the drive screw. The support sleeve continues to move downwards until the threaded part of the drive screw moves to the smooth part below. The support sleeve descends and contacts and compresses the spring until the threads of the support sleeve and the drive screw disengage and the rotation direction is the same as the thread direction of the support sleeve. The vibrating component descends, the rotating soft rod rotates and contacts the hanger, the filter bag shakes, and the dust falls into the ash discharge pipe. In conjunction with the negative pressure fan, the dust rises.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The negative pressure bag filter and its method for simultaneous desulfurization and denitrification of industrial silicon flue gas proposed in this invention utilizes the forward rotation of the fan shaft to draw gas from the dust collector casing and discharge it through the upper exhaust port, which facilitates the upward movement of the flue gas. The rising of the vibrating components disengages from the hanger. Conversely, the reverse rotation of the fan shaft causes the vibrating components to descend and contact the hanger, shaking off dust from the filter bags. This change in airflow facilitates the upward movement of the flue gas, accelerating filtration, while simultaneously suppressing the upward movement of shaken dust during filter bag vibration. These two functions work together and complement each other. Attached Figure Description

[0027] Figure 1 This is an overall structural diagram of the present invention;

[0028] Figure 2 This is an internal sectional view of the present invention;

[0029] Figure 3 This is a structural diagram of the dust removal component and negative pressure component of the present invention;

[0030] Figure 4 This is a structural diagram of the filter bag component of the present invention;

[0031] Figure 5 This is an upward view of the vibration component of the present invention;

[0032] Figure 6 This is a structural diagram of the desulfurization and denitrification component of the present invention.

[0033] In the diagram: 1. Dust collector casing; 11. Lower air inlet; 12. Upper exhaust outlet; 13. Ash discharge pipe; 14. Support frame; 2. Dust collection assembly; 21. Suspension components; 211. Hanger; 212. Suspension frame; 213. Horizontal bar; 214. Vertical bar; 22. Filter bag assembly; 221. Limiting ring; 222. Top plate; 223. Warp reinforcing rib; 224. Bottom ring; 225. Filter bag; 3. Negative pressure assembly; 31. Negative pressure fan; 32. 33. Fan shaft; 34. Exhaust pipe; 35. Support frame; 46. Servo motor; 57. Desulfurization and denitrification components; 48. Filter frame; 49. Support cover; 40. Catalyst; 50. Transmission components; 51. Bevel gear set; 52. Limiting bracket; 53. Transmission screw; 54. Support ring; 55. Support sleeve; 56. Limiting slider; 67. Limiting head; 68. Vibration components; 69. Vibration motor; 60. Motor platform; 61. Rotating flexible rod. Detailed Implementation

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] To solve the problems in the prior art that when using a rotating control shaft, only the dust gas flow rate at the dust gas inlet is adjusted, and there is no equipment that provides how to accelerate the upward movement through negative pressure and how to dust the filter bag. At the same time, the existing equipment only adds a fan and a pulse method for shaking off dust, and the two pieces of equipment are not联动处理 (should be "interlocked"), the equipment structures are independent and cannot be used in cooperation with each other, the following technical solutions are given. Please refer to Figure 1-6 ;

[0036] A negative pressure bag filter for simultaneous desulfurization and denitrification of industrial silicon flue gas includes a dust collector housing 1. On both sides symmetrically, there are a lower air inlet 11 and an upper exhaust outlet 12 respectively. A dust discharge pipe 13 is provided at the bottom end of the dust collector housing 1. The dust collector housing 1 is supported by a bracket 14. Inside the dust collector housing 1, there are a dust removal component 2, a negative pressure component 3, and a desulfurization and denitrification component 4. The negative pressure component 3 is located above the dust removal component 2 and is connected to the upper exhaust outlet 12. The desulfurization and denitrification component 4 is located below the dust removal component 2.

[0037] The dust removal component 2 includes a suspension component 21 and a filter bag component 22. The suspension component 21 is provided on the dust collector housing 1, and the suspension component 21 is connected to the filter bag component 22.

[0038] Specifically, the desulfurization and denitrification component 4 first treats the industrial silicon flue gas, performs desulfurization and denitrification on the flue gas. The treated flue gas continues to rise and is driven by the negative pressure component 3 to rise. The rising flue gas passes through the dust removal component 2 for dust removal, and then the purified gas is discharged. After the flue gas treatment is completed, when it is necessary to clean the dust removal component 2, the negative pressure component 3 reverses to drive the air flow to descend, and controls the dust removal component 2 to shake, and shakes off the dust.

[0039] The suspension component 21 includes a hanger 211, a suspension frame 212, a cross bar 213, and a longitudinal bar 214. One end of the hanger 211 is fixed to the top wall of the dust collector housing 1 by bolts. The other end of the hanger 211 is connected to the suspension frame 212. A plurality of cross bars 213 and longitudinal bars 214 are vertically and alternately fixed on the suspension frame 212;

[0040] The filter bag component 22 includes a limiting ring 221, a top plate 222, warp reinforcing ribs 223, a bottom ring 224, and a filter bag 225. Several warp reinforcing ribs 223 are arranged in a ring to form an outer frame, and their two ends are connected to the top plate 222 and the bottom ring 224 respectively. The limiting ring 221 is fixed to the inner side of the outer frame. The top plate 222 is fixed to the connection point of the cross bar 213 and the longitudinal bar 214 through the connecting rod.

[0041] The opening of the filter bag 225 allows the bottom ring 224 to be inserted and fitted onto the outer frame, while the side circumference of the top plate 222 is fixed to the filter bag 225.

[0042] The filter bag 225 has an open structure at both ends, and the pore size of the filter bag 225 does not exceed 1mm.

[0043] Specifically, the filter bag 225 has openings at both ends, which makes it easy to fit one end of the filter bag 225 onto the outer frame of the warp reinforcing rib 223. The top of the filter bag 225 is fixed and sealed by the top plate 222, and the bottom opening facilitates the intake of flue gas. The incoming flue gas passes through the pores of the filter bag 225 to achieve the purpose of filtration.

[0044] The negative pressure assembly 3 includes a negative pressure fan 31, a fan shaft 32, an exhaust pipe 33, a support frame 34, and a servo motor 35. The support frame 34 is located inside the dust collector housing 1 on one side of the upper exhaust port 12. The servo motor 35 is located on the support frame 34. The shaft of the servo motor 35 is connected to one end of the fan shaft 32, and the other end of the fan shaft 32 extends to the exhaust pipe 33 embedded in the upper exhaust port 12.

[0045] A negative pressure fan 31 is installed on the fan shaft 32. The negative pressure fan 31 is located above the suspension component 21. The transmission component 5 connected to the negative pressure fan 31 drives the vibration component 6 to move up and down. When the vibration component 6 descends, it contacts the hanger 211 to shake off the dust on the filter bag 225. When the vibration component 6 rises, it disengages from the hanger 211.

[0046] The transmission component 5 includes a bevel gear set 51, a limiting bracket 52, a transmission screw 53, a support sleeve 54, a limiting slider 55, and a limiting head 56. The limiting bracket 52 is fixed to the inner wall of the dust collector housing 1 by a bracket rod. The bearing inside the limiting bracket 52 is penetrated by the smooth part at the top of the transmission screw 53. One end of the transmission screw 53 meshes with the fan shaft 32 through the bevel gear set 51. The threaded part in the middle of the transmission screw 53 meshes with the support sleeve 54, and the transmission screw 53 passes through the support sleeve 54 and is fixed to the limiting head 56.

[0047] The strip groove on the side of the support sleeve 54 is engaged by the limiting slider 55, which is fixed to the inner wall of the dust collector housing 1. The forward or reverse rotation of the fan shaft 32 drives the support sleeve 54 to rise or fall.

[0048] The vibration component 6 includes a vibration motor 61, a motor platform 62, and a rotating flexible rod 63. The motor platform 62 is fixed on the side wall of the support sleeve 54. The vibration motor 61 is bolted to the motor platform 62, and the shaft of the vibration motor 61 is connected to the rotating flexible rod 63.

[0049] A support ring 531 is provided below the transmission screw 53. A spring is fixed on the support ring 531 and is sleeved on the transmission screw 53. As the support sleeve 54 descends, the support sleeve 54 disengages from the threaded part of the transmission screw 53, and the smooth part below the transmission screw 53 slides into the support sleeve 54, while the spring abuts against the circumferential surface of the bottom of the support sleeve 54.

[0050] The desulfurization and denitrification assembly 4 includes a filter frame 41, a support cover 42, and a catalyst 43. One end of the filter frame 41 is inserted into the lower air inlet 11, and the other end of the filter frame 41 extends into the dust collector housing 1. The support cover 42 covers the outside of the filter frame 41, and the catalyst 43 is located inside the support cover 42.

[0051] Specifically, by rotating the fan shaft 32 forward or backward, the gas inside the dust collector housing 1 is drawn out and discharged from the upper exhaust port 12, which facilitates the rise of flue gas or suppresses the rise of shaken dust and accelerates its descent to discharge dust from the ash discharge pipe 13. Furthermore, by rotating the fan shaft 32 forward or backward, the vibrating component 6 is driven to move up and down. When the vibrating component 6 descends, it contacts the hanger 211 to shake off the dust on the filter bag 225. When the vibrating component 6 rises, it disengages from the hanger 211, achieving mutual linkage between the two. By changing the airflow, it can facilitate the rise of flue gas to accelerate filtration, and it can also suppress the rise of shaken dust when shaking the filter bag 225. The two functions not only cooperate with each other, but also assist each other.

[0052] The method for implementing a negative pressure bag filter dust collector for simultaneous desulfurization and denitrification of industrial silicon flue gas includes the following steps:

[0053] Step 1: Servo motor 35 drives fan shaft 32 to rotate forward, then negative pressure fan 31 and transmission screw 53 rotate forward synchronously. When fan shaft 32 rotates forward, the airflow generated by the rotation of fan shaft 32 is directed toward exhaust pipe 33, which causes negative pressure to be generated inside dust collector housing 1, which is used to draw the flue gas in the lower air inlet 11. After being catalyzed by catalyst 43, the flue gas rises through support cover 42.

[0054] Step 2: After rising, the part containing dust is absorbed by the filter bag 225, and the purified gas is discharged from the upper exhaust port 12.

[0055] Step 3: When the transmission screw 53 rotates forward, the support sleeve 54 rises along the limit slider 55. The support sleeve 54 moves upward from the threaded part of the transmission screw 53 to the smooth part above. The rotation direction of the transmission screw 53 is the same as the thread direction of the support sleeve 54. The thread of the transmission screw 53 provides support for the support sleeve 54 and does not affect the rotation of the transmission screw 53. When the vibrating component 6 rises, it disengages from the hanger 211, and the filter bag 225 does not shake.

[0056] Step 4: When the fan shaft 32 is in reverse, the airflow generated by the rotation of the fan shaft 32 is directed towards the ash discharge pipe 13;

[0057] Step 5: When the transmission screw 53 reverses, the support sleeve 54 descends along the limit slider 55. The rotation direction of the transmission screw 53 is opposite to the thread direction of the support sleeve 54. The transmission screw 53 is subjected to gravity, and the support sleeve 54 engages with the thread of the transmission screw 53. The support sleeve 54 continues to move downwards until the threaded part of the transmission screw 53 moves to the smooth part below. The support sleeve 54 descends and contacts and compresses the spring until the threads of the support sleeve 54 and the transmission screw 53 disengage and the rotation direction is the same as the thread direction of the support sleeve 54. The vibrating component 6 descends, the rotating soft rod 63 rotates and contacts the hanger 211, the filter bag 225 shakes, and the dust falls to the dust discharge pipe 13. In conjunction with the negative pressure fan 31, the dust rises.

[0058] In summary, the negative pressure bag filter dust collector for simultaneous desulfurization and denitrification of industrial silicon flue gas of the present invention first treats the industrial silicon flue gas with the desulfurization and denitrification component 4, and the treated flue gas continues to rise under the drive of the negative pressure component 3. The rising flue gas passes through the dust removal component 2 for dust removal, thereby discharging the purified gas. After the flue gas treatment is completed, when it is necessary to clean the dust removal component 2, the negative pressure component 3 reverses to drive the airflow downward and controls the dust removal component 2 to shake off the dust.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A negative pressure bag filter for simultaneous desulfurization and denitrification of industrial silicon flue gas, characterized in that, The dust collector housing (1) has a lower air inlet (11) and an upper exhaust outlet (12) symmetrically arranged on both sides. A dust discharge pipe (13) is provided at the bottom of the dust collector housing (1). The dust collector housing (1) is supported by a bracket (14). The dust collector housing (1) is equipped with a dust collection component (2), a negative pressure component (3), and a desulfurization and denitrification component (4). The negative pressure component (3) is located above the dust collection component (2) and is connected to the upper exhaust outlet (12). The desulfurization and denitrification component (4) is located below the dust collection component (2). The dust collection component (2) includes a suspension component (21) and a filter bag component (22). The suspension component (21) is set on the dust collector housing (1) and is connected to the filter bag component (22). The suspension component (21) includes a hanger (211), a suspension frame (212), and a crossbar (213). The frame consists of a frame and a vertical rod (214). One end of the hanger (211) is fixed to the top wall of the dust collector housing (1) by bolts, and the other end of the hanger (211) is connected to the suspension frame (212). Several horizontal rods (213) and vertical rods (214) are vertically and alternately fixed to the suspension frame (212). The filter bag component (22) includes a limiting ring (221), a top plate (222), warp reinforcing ribs (223), a bottom ring (224), and a filter bag (225). Several warp reinforcing ribs (223) are arranged in a ring to form an outer frame, and their two ends are connected to the top plate (222) and the bottom ring (224) respectively. The limiting ring (221) is fixed to the inner side of the outer frame. The top plate (222) is fixed to the connection point of the horizontal rods (213) and vertical rods (214) through a connecting rod. The opening of the filter bag (225) allows the bottom ring (224) to be inserted. And fitted onto the outer frame, the side circumference of the top plate (222) is fixed to the filter bag (225), the filter bag (225) has a structure with open ends, and the pore size of the filter bag (225) does not exceed 1mm. The negative pressure assembly (3) includes a negative pressure fan (31), a fan shaft (32), an exhaust pipe (33), a support frame (34) and a servo motor (35). The support frame (34) is set inside the dust collector housing (1) on the side of the upper exhaust port (12). The servo motor (35) is set on the support frame (34). The shaft of the servo motor (35) is connected to one end of the fan shaft (32), and the other end of the fan shaft (32) extends to the upper exhaust port. The exhaust pipe (33) inside the mouth (12) is provided with a negative pressure fan (31) on the fan shaft (32). The negative pressure fan (31) is located above the suspension component (21). The transmission component (5) connected to the negative pressure fan (31) drives the vibration component (6) to move up and down. When the vibration component (6) descends, it contacts the hanger (211) to shake off the dust on the filter bag (225). When the vibration component (6) rises, it disengages from the hanger (211). The transmission component (5) includes a bevel gear set (51), a limiting bracket (52), a transmission screw (53), a support sleeve (54), a limiting slider (55), and a limiting head (56).The limiting bracket (52) is fixed to the inner wall of the dust collector housing (1) via a support rod. The bearing inside the limiting bracket (52) is penetrated by the smooth part at the top of the transmission screw (53). One end of the transmission screw (53) meshes with the fan shaft (32) via a bevel gear set (51). The threaded part in the middle of the transmission screw (53) meshes with the support sleeve (54), and the transmission screw (53) passes through the support sleeve (54) and is fixed to the limiting head (56). The strip groove on the side of the support sleeve (54) is engaged by the limiting slider (55), which is fixed to the inner wall of the dust collector housing (1). The forward or reverse rotation of the fan shaft (32) drives the support sleeve (54) to rise or fall.

2. The negative pressure bag filter for simultaneous desulfurization and denitrification of industrial silicon flue gas as described in claim 1, characterized in that, The vibration component (6) includes a vibration motor (61), a motor platform (62), and a rotating flexible rod (63). The motor platform (62) is fixed on the side wall of the support sleeve (54). The vibration motor (61) is installed on the motor platform (62) by bolts. The shaft of the vibration motor (61) is connected to the rotating flexible rod (63).

3. The negative pressure bag filter for simultaneous desulfurization and denitrification of industrial silicon flue gas as described in claim 2, characterized in that, A support ring (531) is provided below the transmission screw (53). A spring is fixed on the support ring (531). The spring is sleeved on the transmission screw (53). When the support sleeve (54) descends, the support sleeve (54) disengages from the threaded part of the transmission screw (53), and the smooth part below the transmission screw (53) slides into the support sleeve (54). The spring abuts against the circumferential surface of the bottom of the support sleeve (54).

4. The negative pressure bag filter for simultaneous desulfurization and denitrification of industrial silicon flue gas as described in claim 3, characterized in that, The desulfurization and denitrification assembly (4) includes a filter frame (41), a support cover (42) and a catalyst (43). One end of the filter frame (41) is inserted into the lower air inlet (11), and the other end of the filter frame (41) extends into the dust collector housing (1). The support cover (42) covers the outside of the filter frame (41), and the catalyst (43) is located inside the support cover (42).

5. The method for implementing the negative pressure bag filter dust collector for simultaneous desulfurization and denitrification of industrial silicon flue gas as described in claim 4, characterized in that, Includes the following steps: S1: When the servo motor (35) drives the fan shaft (32) to rotate in the forward direction, the negative pressure fan (31) and the transmission screw (53) rotate in the forward direction synchronously. When the fan shaft (32) rotates in the forward direction, the airflow generated by the rotation of the fan shaft (32) is directed toward the exhaust pipe (33), which causes a negative pressure to be generated inside the dust collector housing (1), which is used to extract the flue gas in the lower air inlet (11). After being catalyzed by the catalyst (43), the flue gas rises through the support cover (42). S2: After rising, the part containing dust is absorbed by the filter bag (225), and the purified gas is discharged from the upper exhaust port (12); S3: When the drive screw (53) rotates forward, the support sleeve (54) rises along the limit slider (55). The support sleeve (54) moves upward from the threaded part of the drive screw (53) to the smooth part above. The rotation direction of the drive screw (53) is the same as the thread direction of the support sleeve (54). The thread of the drive screw (53) provides support for the support sleeve (54) and does not affect the rotation of the drive screw (53). When the vibrating component (6) rises, it disengages from the hanger (211), and the filter bag (225) does not shake. S4: When the fan shaft (32) is in reverse, the airflow generated by the rotation of the fan shaft (32) is directed toward the ash discharge pipe (13). S5: When the drive screw (53) reverses, the support sleeve (54) descends along the limit slider (55). The rotation direction of the drive screw (53) is opposite to the thread direction of the support sleeve (54). The drive screw (53) is subjected to gravity. The support sleeve (54) engages with the thread of the drive screw (53). The support sleeve (54) continues to move downward. The threaded part of the drive screw (53) moves to the smooth part below. The support sleeve (54) descends to contact and compress the spring until the threads of the support sleeve (54) and the drive screw (53) disengage and the rotation direction is the same as the thread direction of the support sleeve (54). The vibration component (6) descends, the rotating soft rod (63) rotates and contacts the hanger (211). The filter bag (225) shakes, shaking the dust off to the ash discharge pipe 13, and cooperates with the negative pressure fan (31) to suppress the dust from rising.

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