Cloth bag dust removal module, flake caustic soda crushing treatment production line and dust removal method

Abstract

This invention discloses a bag filter dust collection module, a caustic soda flake crushing and processing production line, and a dust removal method, relating to the field of caustic soda flake dust removal technology. The bag filter dust collection module includes a housing, within which are a first cavity and a second cavity; a first cylinder is housed within the first cavity, and a vent hole is provided on the side wall of the first cylinder for connecting to the first cavity; a second cylinder is housed within the second cavity; a bag filter element is connected to the outer wall of the second cylinder; a dust removal ring and a tension spring are fitted around the outer periphery of the bag filter element, with the top end of the tension spring connected to the bag filter element and the bottom end connected to the dust removal ring. The bag filter dust collection module can filter air-powder mixtures, achieving the collection of caustic soda powder particles, thereby reducing pollution in the processing workshop and the outside air. The bag filter element alternately accelerates and decelerates, thereby driving the dust removal ring to reciprocate along the axial direction of the bag filter element to brush off the caustic soda powder particles adhering to the surface of the bag filter element. This invention avoids the use of high-pressure airflow, thus avoiding the risk of the bag filter element bursting and improving its service life.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology for caustic soda flakes, specifically to a bag filter dust collection module, a caustic soda flake crushing and processing production line, and a dust removal method. Background Technology

[0002] The extraction of rare earth chlorides from monazite requires a large amount of alkaline solvent for the chemical reaction. There are two methods for adding the alkaline solvent: one is to add it directly to the reaction vessel, and the other is to add caustic soda flakes and stir. The alkaline solution has a high water content, resulting in a large weight, which is inconvenient for both storage and transportation. Caustic soda flakes, on the other hand, can be obtained by crushing caustic soda plates before use, and these plates offer better storage and transportation performance.

[0003] Dust pollution is generated when caustic soda is crushed. At the same time, dust pollution is also generated when caustic soda flakes are transported on conveyor belts (for example, when dumping between different conveyor belts). Furthermore, dust pollution that escapes outside the processing workshop will cause air pollution.

[0004] Baghouse dust collectors, also known as bag filters, are commonly used dust removal equipment. The filter bags in a baghouse dust collector are made of woven filter cloth or non-woven felt, capable of filtering solid particles from air-powder mixtures. After prolonged use, baghouse dust collectors may experience bag clogging. Traditionally, high-pressure airflow is used for backwashing to clean the solid particles adhering to the bags, but this method often results in the bags bursting or tearing. Summary of the Invention

[0005] In order to overcome the problem that "backwashing cleaning has the risk of rupturing the filter bag" in the above-mentioned background technology, the present invention provides a bag filter dust removal module, a caustic soda crushing and processing production line and a dust removal method.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] A baghouse dust collector module includes a housing, within which a first cavity and a second cavity located below the first cavity are provided. The sidewall of the housing is provided with an inlet pipe, a dust outlet pipe, and an outlet pipe. The inlet pipe communicates with the lower outer edge of the second cavity, the dust outlet pipe communicates with the bottom end of the second cavity, and the outlet pipe communicates with the first cavity. A partition is provided at the junction of the first and second cavities. A first cylindrical body is provided within the first cavity, and the sidewall of the first cylindrical body has a vent hole for communicating with the first cavity. A second cylindrical body is provided within the second cavity and is connected to and communicates with the first cylindrical body. A filter bag is connected to the outer wall of the second cylinder; a dust removal ring and a tension spring are fitted around the outer periphery of the filter bag, with the top end of the tension spring connected to the filter bag and the bottom end connected to the dust removal ring; the first cylinder, the second cylinder, and the filter bag can rotate synchronously; the second cylinder can rotate at an accelerated speed, causing the dust removal ring to slide from the middle of the filter bag to the bottom end under the action of centrifugal force; the second cylinder can rotate at a decelerated speed, causing the dust removal ring to slide from the bottom end of the filter bag to the middle under the tension of the tension spring; the side wall of the second cylinder is provided with a vent hole for communicating with the inner cavity of the filter bag.

[0008] As a further optimization of the present invention, the dust removal ring includes a ring body and bristles; the bristles are arranged radially along the filter bag element; one end of the bristles is fixedly connected to the inner wall of the ring body, and the other end is pressed against the outer surface of the filter bag element; a vertically arranged wind-facing plate is provided at the top or bottom of the outer surface of the ring body; when the rotation speed or rotation direction of the second cylinder changes, the wind-facing plate swings due to the change in wind resistance, thereby driving the bristles to swing.

[0009] As a further optimization of the present invention, the bag filter element includes a top cylinder, support columns, a stop seat, and a bag tube; the top cylinder is fixedly connected to the second cylinder; a plurality of support columns are arranged in a regular polygonal array between the top cylinder and the stop seat; the top and bottom ends of the support columns are fixedly connected to the top cylinder and the stop seat, respectively; the bag tube covers the outer periphery of the support columns, and the top and bottom ends of the bag tube are fixedly connected to the top cylinder and the stop seat, respectively.

[0010] As a further optimization of the present invention, both the first cylinder and the second cylinder are arranged vertically; a first motor is installed at the top plate of the shell, and the top of the first cylinder is coaxially arranged and fixedly connected to the first output shaft of the first motor.

[0011] As a further optimization of the present invention, the bottom end of the dust removal pipe is connected to and communicates with a storage tank, and the bottom end of the storage tank is connected to and communicates with a discharge pipe; a third valve body is provided in the middle of the dust removal pipe, and a fourth valve body is provided at the end of the discharge pipe; a vibration motor is installed at the bottom end of the outer wall of the shell.

[0012] As a further optimization of the present invention, a first mounting hole is provided at the center of the partition plate, a first bearing is installed at the bottom end of the outer side wall of the first cylinder, and the first bearing is installed in the first mounting hole; a concave hole is provided on the bottom surface of the top plate, a second bearing is installed at the top end of the outer side wall of the first cylinder, and the second bearing is installed in the concave hole.

[0013] As a further optimization of the present invention, the air intake pipe is located below the bag filter element.

[0014] As a further optimization of the present invention, the stop seat is cylindrical; the end face diameter of the stop seat is larger than the maximum inner diameter of the ring body.

[0015] The caustic soda flakes crushing and processing production line includes a bag filter dust collection module, a crusher, a conveyor belt, and a dust-proof chamber. Both the crusher and the conveyor belt are located within the dust-proof chamber. A hopper is inserted into the floor of the dust-proof chamber, with its top located below one end of the conveyor belt and its bottom connected to a reaction tank. The roof of the dust-proof chamber is equipped with a cover plate for feeding caustic soda flakes into the crusher. An air pump is installed on the outer wall of the dust-proof chamber, with its inlet connected to the inner cavity of the dust-proof chamber via an exhaust pipe, and its exhaust port connected to the inlet pipe.

[0016] The dust removal method for the caustic soda flake crushing production line includes methods for extracting caustic soda particles and methods for recovering caustic soda particles.

[0017] The extraction method includes the following steps: A1. Start the air pump, then open the cover plate to allow outside air to flow into the dust-proof chamber through the cover plate; during the process, the air pump can extract the air-powder mixture in the dust-proof chamber and press it into the bag filter module; the alkaline powder particles in the air-powder mixture are blocked by the bag filter element and fall to the bottom of the first cavity, and the gas in the air-powder mixture passes through the bag filter element and is discharged through the air outlet pipe; A2. Turn off the air pump and the cover plate.

[0018] The recycling method includes the following steps: S1, turning off the air pump; then turning on the third valve and the vibration motor, allowing the alkaline powder particles accumulated at the bottom of the first cavity to slide into the storage tank; S2, turning off the third valve; S3, rotating the second cylinder and the bag filter element, causing the dust removal ring to move and brush off the alkaline powder particles adhering to the surface of the bag filter element; S4, stopping the rotation of the second cylinder and the bag filter element; S5, turning on the third valve, allowing the alkaline powder particles to slide into the storage tank; S6, turning off the third valve and the vibration motor.

[0019] Step S3 further includes the following steps: S31, the first motor drives the second cylinder to rotate at an accelerated speed, causing the dust removal ring to slide from the middle to the bottom of the filter bag under the action of centrifugal force; S32, the first motor drives the second cylinder to rotate at a decelerated speed, causing the dust removal ring to slide from the bottom to the middle of the filter bag under the action of the tension spring; S33, repeating steps S31 to S32 several times, causing the dust removal ring to move back and forth along the axial direction of the filter bag.

[0020] In summary, the present invention has at least one of the following advantages:

[0021] (1) The bag filter module can filter the air-powder mixture and collect the alkaline powder particles, thereby reducing the pollution of the processing workshop and the outside air; it uses a dust removal ring with bristles to clean the alkaline powder particles adhering to the bag filter element, avoiding the use of high-pressure airflow, thus avoiding the risk of the bag filter element bursting, and reducing the number of times the bag filter element expands and bends, thereby improving its service life.

[0022] (2) The first cylinder, the second cylinder and the filter bag can accelerate rotation, so that the dust removal ring slides from the middle of the filter bag to the bottom under the action of centrifugal force; the first cylinder, the second cylinder and the filter bag can decelerate rotation, so that the dust removal ring slides from the bottom of the filter bag to the middle under the action of tension spring; the first cylinder, the second cylinder and the filter bag perform alternating acceleration and deceleration movements, thereby driving the dust removal ring to move back and forth along the axial direction of the filter bag, thereby increasing the cleaning range of the filter bag and enhancing the cleaning effect.

[0023] (3) A wind-facing plate is provided on the outer surface of the ring. When the rotation speed or rotation direction of the second cylinder changes, the wind-facing plate swings due to the change in wind resistance, which in turn drives the brush bristles to swing, thereby improving the cleaning effect on the bag filter element.

[0024] (4) The bag filter element is tilted. The air inlet pipe is located below the bag filter element, so the overall flow direction of the air-powder mixture in the second chamber is from bottom to top. Therefore, more alkaline powder particles and dust particles adhere to the lower part of the bag filter element rather than the upper part. Compared with the technical solution using a compression spring, the present invention uses a tension spring to drive the dust removal ring to move. The range of motion of the dust removal ring is more located in the lower part of the bag filter element, where the density of alkaline powder particles is relatively large. In addition, the cleaning blind zone generated by the tension spring under the compression limit state is located at the top of the bag filter element where the density of alkaline powder particles is smaller. Therefore, the present invention further improves the cleaning effect.

[0025] (5) During the process of the gas-powder mixture flowing into the second cavity through the air inlet pipe, the first motor can drive the first cylinder, the second cylinder and the filter bag to rotate slowly. Then the filter bags located below will pass through the inner port of the air inlet pipe in sequence. The alkaline powder particles will be evenly adhered to the filter bags located below, rather than being mainly concentrated on a certain filter bag, thereby improving the uniformity of the distribution of alkaline powder particles and avoiding the problem of difficult cleaning caused by excessive alkaline powder particles adhering to a single filter bag.

[0026] (6) The crusher and conveyor belt are both located in the dust-proof room. During operation, the air pump is started first and then the cover is opened. The opening will generate an inward airflow instead of an outward diffuse airflow, which can effectively reduce the problem of alkali powder particles overflowing, thereby ensuring the health and safety of personnel who put alkali board into the room, and can also effectively reduce dust pollution in the processing workshop.

[0027] (7) During operation, first place the alkali powder particles in the storage tank, then close the third valve body and then rotate the filter bag. This can avoid the problem of the airflow generated by the rotation of the filter bag blowing away the alkali powder particles that have already been deposited, thus facilitating the recovery of alkali powder particles. Attached Figure Description

[0028] The present application will be further explained below with reference to the accompanying drawings:

[0029] Figure 1 This is a front view of the overall structure of the present invention.

[0030] Figure 2 This is a front view of the vertical section showing the positions and structures of the first cylinder, the second cylinder, the bag filter element, and the dust removal ring.

[0031] Figure 3 This is a front view of the vertical section of the bag filter element structure.

[0032] Figure 4 This is a schematic diagram showing the position of the dust collector ring under tension.

[0033] Figure 5 This is a front view diagram of the vertical section of the dust removal ring structure;

[0034] Figure 6 This is a structural schematic diagram of the cross-section of the bag filter element and the dust collector ring.

[0035] Figure 7 This is a front view diagram of the installation position and structural section of the first cylinder.

[0036] Figure 8 A schematic diagram of the connection structure between the bag cylinder and the mounting fins;

[0037] Figure 9 This is a schematic diagram of the connection structure between the tension spring and the mounting fins;

[0038] Figure 10 This is a schematic diagram of the connection structure between the bag tube and the stop seat;

[0039] Figure 11 This is a schematic diagram of the connection structure between the tension spring and the ring body;

[0040] Figure 12 This is a schematic diagram of the connection structure between the tension spring and the tensioning protrusion;

[0041] Figure 13 This is a front view of the elevation section of the storage tank's location and structure.

[0042] Figure 14 This diagram shows the installation locations of the crusher, conveyor belt, dust chamber, and bag filter module.

[0043] Explanation of reference numerals in the attached figures:

[0044] In the picture,

[0045] 1. Shell; 11. First cavity; 12. Second cavity; 13. Partition; 14. Air inlet pipe; 15. Dust outlet pipe; 151. Storage tank; 152. Third valve body; 153. Discharge pipe; 154. Fourth valve body; 16. Air outlet pipe; 17. Top plate; 18. First motor; 181. First output shaft; 182. Third bearing;

[0046] 2. First cylinder; 21. Vent hole; 22. First bearing; 23. Second bearing;

[0047] 3. Second cylinder; 31. Vent hole; 32. First fin; 33.

[0048] 4. Bag filter element; 41. Top cylinder; 411. Mounting fins; 412. Reinforcing ring; 413. First mounting ring; 42. Support column; 43. Stop seat; 431. Second mounting ring; 44. Bag cylinder;

[0049] 5. Dust removal ring; 51. Ring body; 511. Third mounting ring; 52. Brush bristles; 53. Windshield; 531. Wind resistance;

[0050] 6. Tension spring; 61. Pull-in protrusion; 62. First rectangular slot; 63. Second rectangular slot;

[0051] 7. Crusher;

[0052] 8. Conveyor belt; 81. Hopper; 82. Reaction tank;

[0053] 9. Dust-free chamber; 91. Cover plate; 92. Air pump; 93. Support frame. Detailed Implementation

[0054] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows:

[0055] Reference Figures 1-2 This embodiment provides a bag filter module, including a housing 1. The housing 1 contains a first cavity 11 and a second cavity 12 located below the first cavity 11. The first cavity 11 is cylindrical; the second cavity 12 has a cylindrical upper part and an inverted conical lower part. The side wall of the housing 1 is provided with an inlet pipe 14, a dust outlet pipe 15, and an outlet pipe 16 (for example, sealed and fixed by welding or by bolts and sealing rings). A first valve body is installed in the middle of the inlet pipe 14, and a second valve body is installed in the middle of the outlet pipe 16. When dust filtration is required, the first and second valve bodies are opened to maintain a pressure balance inside and outside the housing 1; when dust filtration is not required, the first and second valve bodies are closed to prevent moisture from entering the housing 1, thereby avoiding the problem of alkali powder particles accumulating and caking on the inner wall of the housing 1, thus facilitating the subsequent collection of alkali powder particles.

[0056] Reference Figure 1 and Figure 2 The dust outlet pipe 15 is connected to the bottom tip of the second cavity 12, and the air outlet pipe 16 is connected to the first cavity 11; thus, the alkaline powder particles that settle are gathered at the bottom of the second cavity 12 and flow into the dust outlet pipe 15 to be discharged from the second cavity 12.

[0057] Reference Figure 1 and Figure 2 A partition 13 is provided at the junction of the first cavity 11 and the second cavity 12; the partition 13 is used to separate the first cavity 11 and the second cavity 12 so that the two form independent spaces.

[0058] Reference Figure 1 , Figure 2 , Figure 3 and Figure 7The first cavity 11 contains a first cylindrical body 2, and the side wall of the first cylindrical body 2 has vent holes 21 for connecting to the first cavity 11. Several vent holes 21 are arranged in a circular array along the cylindrical circumference of the first cylindrical body 2. The second cavity 12 contains a second cylindrical body 3 connected to and communicating with the first cylindrical body 2 (the bottom end of the first cylindrical body 2 is open, and the top end of the second cylindrical body 3 is open, thus achieving communication between the inner cavities of the first cylindrical body 2 and the second cylindrical body 3). The side wall of the second cylindrical body 3 has vent holes 31 for connecting to the inner cavity of the bag filter element 4. The gas in the gas-powder mixture flows sequentially through the inlet pipe 14, the second cavity 12, the bag filter element 4, the vent holes 31, the inner cavity of the second cylindrical body 3, the inner cavity of the first cylindrical body 2, the vent holes 21, the first cavity 11, and the outlet pipe 16, achieving discharge.

[0059] Reference Figure 2 and Figure 3 A bag filter element 4 is connected to the outer wall of the second cylinder 3. The end of the bag filter element 4 away from the second cylinder 3 is inclined downward with respect to the horizontal plane (the inclination angle is 30 degrees to 60 degrees). Several bag filter elements 4 are arranged in a circumferential array along the cylindrical surface of the second cylinder 3, thereby increasing the filtration efficiency.

[0060] Reference Figure 2 and Figure 3 The bag filter element 4 is fitted with a dust removal ring 5 and a tension spring 6 around its outer periphery. The top end of the tension spring 6 is connected to the bag filter element 4, and the bottom end is connected to the dust removal ring 5. Under the combined action of centrifugal force and the elastic force of the tension spring 6, the dust removal ring 5 can slide back and forth along the axis of the bag filter element 4, thereby brushing off (small volume) alkaline powder particles and dust particles (see reference) adhering to the outer surface of the bag filter element 4. Figure 14 Dust particles will be mixed in with the air flowing in through cover plate 91.

[0061] Reference Figures 2-4 The first cylinder 2, the second cylinder 3, and the filter bag 4 can rotate synchronously (centered on the axis of the first cylinder 2). The first cylinder 2, the second cylinder 3, and the filter bag 4 can accelerate their rotation, causing the dust removal ring 5 to slide from the middle to the bottom of the filter bag 4 under the action of centrifugal force (at this time, the centrifugal force is greater than the tension of the tension spring 6; the specific rotational speed is related to the mass of the dust removal ring 5 and can be obtained through a limited number of experiments). The first cylinder 2, the second cylinder 3, and the filter bag 4 can also decelerate their rotation, causing the dust removal ring 5 to slide from the bottom to the middle of the filter bag 4 under the action of the tension spring 6 (at this time, the centrifugal force is less than the tension of the tension spring 6; the specific rotational speed is related to the mass of the dust removal ring 5 and can be obtained through a limited number of experiments). The first cylinder 2, the second cylinder 3, and the filter bag 4 alternately accelerate and decelerate, thereby driving the dust removal ring 5 to reciprocate along the axial direction of the filter bag 4 to remove alkaline powder particles and dust particles adhering to the surface of the filter bag 4.

[0062] Reference Figures 5-6The dust removal ring 5 includes a ring body 51 and bristles 52; the bristles 52 are arranged radially along the filter bag element 4; one end of the bristles 52 is fixedly connected to the inner wall of the ring body 51 (e.g., by heat fusion connection), and the other end is pressed against the outer surface of the filter bag element 4. The bristles 52 provide support between the filter bag element 4 and the ring body 51; the ends of the bristles 52 can brush off alkaline powder particles and dust particles adhering to the surface of the filter bag element 4.

[0063] Reference Figure 4 , Figure 5 and Figure 6 The outer surface of the ring 51 has a vertically arranged wind-facing plate 53 at its top or bottom (e.g., fixed by an integral connection or by bolts). When the rotation speed or direction of the second cylinder 3 changes, it can drive the wind-facing plate 53 and the brush bristles 52 to swing, thereby improving the cleaning effect on the bag filter element 4. The wind-facing plate 53 is arranged along the axial direction of the ring 51. The wind-facing plate 53 has a straight plate structure and has two wind-facing surfaces, left and right. The bag filter element 4 rotates around the axis of the first cylinder 2 / the axis of the second cylinder 3, synchronously driving the dust removal ring 5 to rotate around the axis of the first cylinder 2 / the axis of the second cylinder 3. During this process, the wind-facing plate 53 tilts due to the wind resistance 531 generated by the rotation (the wind resistance 531 is generated by the relative movement of the wind-facing plate 53 and the air inside the housing 1), thereby driving the ring body 51 (centered on the axis of the bag filter element 4) to rotate. When the rotation speed of the bag filter element 4 (and the dust removal ring 5) changes (e.g., accelerates or decelerates) or rotates... When the direction changes (for example, from clockwise rotation to counterclockwise rotation, or from counterclockwise rotation to clockwise rotation), the magnitude or direction of the wind resistance 531 changes, which enables the wind vane 53 to swing, thereby driving the ring 51 and the brush bristles 52 to swing (i.e., to reciprocate around the axis of the bag filter element 4; the range / angle of rotation depends on the size of the gap between the ring 51 and the bag filter element 4); during the swinging process, the brush bristles 52 can enhance the cleaning effect on the bag filter element 4 (the bag cylinder 44 in it), that is, enhance the dust removal effect.

[0064] Reference Figure 4 , Figure 5 and Figure 6 When the wind vane 53 rotates, it causes the lower end of the tension spring 6 to twist. Since the tension spring 6 has a tendency to reset, it can apply torque to the wind vane 53, making the wind vane 53 tend to stay in the middle of the ring body 51. When the wind resistance 531 decreases, the tension spring 6 can drive the wind vane 53 to rotate towards the middle position of the ring body 51.

[0065] Reference Figure 3 , Figure 4 and Figure 6The bag filter element 4 includes a top cylinder 41, support columns 42, stop seats 43, and a bag tube 44; the top cylinder 41 is fixed and sealed to the second cylinder 3 (e.g., by bolts and sealing rings or by welding); the inner cavity of the top cylinder 41 communicates with the vent hole 31; the support columns 42 are arranged in a regular polygonal array between the top cylinder 41 and the stop seats 43, with the top and bottom ends of the support columns 42 fixedly connected to the top cylinder 41 and the stop seats 43 respectively (e.g., by bolts); the bag tube 44 covers the outer periphery of the support columns 42, the bag tube 44 is pressed against the support columns 42, and the top and bottom ends of the bag tube 44 are fixedly connected to the top cylinder 41 and the stop seats 43 respectively (e.g., by clamping). When the gas-powder mixture flows through the bag filter cylinder 44, the gas can pass through the bag filter cylinder 44, while the alkaline powder particles and dust particles are blocked by the bag filter cylinder 44; and some alkaline powder particles and dust particles adhere to the outer surface of the bag filter cylinder 44; the bristles 52 are used to brush off the alkaline powder particles and dust particles on the outer surface of the bag filter cylinder 44. The gas in the gas-powder mixture enters the inner cavity of the bag filter element 4 through the gap between adjacent support columns 42.

[0066] Reference Figure 6 When the outer surface of the ring 51 is provided with a wind-facing plate 53, the number of support columns 42 is 3 or 4. The support columns 42 are arranged in an array of equilateral triangles or squares. At the same time, the ring 51 is in the shape of a regular triangular or square cylinder and is adapted to the arrangement of the support columns 42 to avoid the ring 51 and the wind-facing plate 53 from rotating excessively and getting stuck, that is, to avoid the problem that the tension spring 6 cannot drive the dust removal ring 6 to rotate and reset.

[0067] Reference Figure 4 A reinforcing ring 412 is fitted onto the top of the top cylinder 41. The inner wall of the reinforcing ring 412 is fixedly connected to the outer wall of the top cylinder 41 (e.g., through an integral fixed connection or through welding). The end face of the reinforcing ring 412 is fixedly connected to the outer wall of the second cylinder 3 (e.g., through welding or through bolts). The reinforcing ring 412 is used to increase the structural strength between the top cylinder 41 and the second cylinder 3, and to prevent the top cylinder 41 from separating from the second cylinder 3 during the rotation of the bag filter element 4.

[0068] Reference Figure 2 and Figure 7 Both the first cylinder 2 and the second cylinder 3 are vertically arranged and coaxially arranged to improve rotational stability. The top of the outer wall of the second cylinder 3 is provided with a first fin 32 (for example, through an integral sealing connection); the first fin 32 is attached to the outer edge of the bottom surface of the first cylinder 2, and the first fin 32 is sealed and fixedly connected to the bottom surface of the first cylinder 2 (for example, through bolts and sealing rings or through welding).

[0069] Reference Figure 2 and Figure 7 The housing 1 has a top plate 17 at its top, which is sealed and fixedly connected to the side plate of the housing 1 (e.g., by bolts and sealing rings or by welding). A first motor 18 is installed at the top plate 17 of the housing 1, and the first motor 18 is vertically arranged. The housing of the first motor 18 is fixedly connected to the top plate 17 by bolts. The top of the first cylinder 2 is coaxially arranged and fixedly connected to the first output shaft 181 of the first motor 18 (e.g., by bolts). The first output shaft 181 of the first motor 18 can rotate, thereby driving the first cylinder 2 to rotate, which in turn drives the second cylinder 3 and the bag filter element 4 to rotate.

[0070] Reference Figure 2 and Figure 7 A first mounting hole is provided at the center of the partition plate 13, and a first bearing 22 is installed at the bottom of the outer side wall of the first cylinder 2. The first bearing 22 is installed in the first mounting hole. The inner ring and outer ring of the first bearing 22 are connected by ball bearings. The inner ring of the first bearing 22 is sealed and fixedly connected to the first cylinder 2 by bolts and a sealing ring. The outer ring of the first bearing 22 is sealed and fixedly connected to the partition plate 13 by bolts and a sealing ring.

[0071] Reference Figure 2 and Figure 7 A recessed hole is provided at the center of the bottom surface of the top plate 17. A second bearing 23 is installed at the top of the outer side wall of the first cylinder 2, and the second bearing 23 is installed in the recessed hole. The inner ring and outer ring of the second bearing 23 are connected by ball bearings. The inner ring of the second bearing 23 is sealed and fixedly connected to the first cylinder 2 by bolts and a sealing ring. The outer ring of the second bearing 23 is sealed and fixedly connected to the top plate 17 by bolts and a sealing ring.

[0072] Reference Figure 2 and Figure 7 A second mounting hole is provided at the center of the top plate 17. A third bearing 182 is sleeved on the outer wall of the first output shaft 181 and installed in the second mounting hole. The inner and outer rings of the third bearing 182 are connected by ball bearings. The inner ring of the third bearing 182 is sealed and fixedly connected to the first output shaft 181 by bolts and a sealing ring. The outer ring of the third bearing 182 is sealed and fixedly connected to the top plate 17 by bolts and a sealing ring.

[0073] Reference Figure 4 , Figure 8 and Figure 9A mounting fin 411 is fixedly provided at the bottom of the outer side wall of the top cylinder 41 (e.g., by an integral fixed connection). A first mounting ring 413 is provided at the end face of the mounting fin 411 near the support column 42. The mounting fin 411 and the first mounting ring 413 are fixedly connected by bolts. The mounting fin 411 and the first mounting ring 413 clamp and fix the upper end of the bag cylinder 44 from both sides (the bolts are inserted into the bag cylinder 44). The mounting fin 411 and the first mounting ring 413 clamp and fix the upper end ring of the tension spring 6 from both sides.

[0074] Reference Figure 4 and Figure 10 A second mounting ring 431 is provided at the end face of the stop seat 43 near the support column 42. The stop seat 43 and the second mounting ring 431 are fixedly connected by bolts. The stop seat 43 and the second mounting ring 431 clamp and fix the bottom end of the bag tube 44 from both sides (the bolt is inserted into the bag tube 44).

[0075] Reference Figure 4 and Figure 11 A third mounting ring 511 is provided on the end face of the ring body 51 near the top cylinder 41. The third mounting ring 511 is fixedly connected to the ring body 51 by bolts. The ring body 51 and the third mounting ring 511 clamp and fix the bottom ring of the tension spring 6 from both sides.

[0076] Reference Figure 9 and Figure 11 The end face of the mounting fin 411 and the end face of the first mounting ring 413 are respectively provided with annular grooves that can be adapted to the upper ring of the tension spring 6; the end face of the ring 51 and the end face of the third mounting ring 511 are respectively provided with annular grooves that can be adapted to the lower ring of the tension spring 6.

[0077] Reference Figure 9 , Figure 11 and Figure 12 The tension spring 6 has a pull-in protrusion 61 fixedly installed at both ends (e.g., by welding). The pull-in protrusion 61 has a cuboid structure. A first rectangular groove 62 is provided between the mounting fin 411 and the first mounting ring 413. The upper pull-in protrusion 61 is adapted to be engaged in the first rectangular groove 62, thereby preventing the upper end of the tension spring 6 from coming out of the space between the mounting fin 411 and the first mounting ring 413. A second rectangular groove 63 is provided between the ring body 51 and the third mounting ring 511. The lower pull-in protrusion 61 is adapted to be engaged in the second rectangular groove 63, thereby preventing the lower end of the tension spring 6 from coming out of the space between the ring body 51 and the third mounting ring 511.

[0078] Reference Figure 13The bottom end of the dust removal pipe 15 is connected to and communicates with a storage tank 151 (e.g., through a sealed connection achieved by welding), and the bottom end of the storage tank 151 is connected to and communicates with a discharge pipe 153 (e.g., through a sealed connection achieved by welding). A third valve body 152 is provided in the middle of the dust removal pipe, and a fourth valve body 154 is provided at the end of the discharge pipe 153; a vibration motor is installed at the bottom end of the outer wall of the housing 1. The housing of the vibration motor is fixedly connected to the outer wall of the housing 1 by bolts. The vibration motor can drive the bottom end of the housing 1 to vibrate, thereby allowing the alkaline powder particles and dust particles accumulated on the conical surface at the bottom of the second cavity 12 to enter the storage tank 151 through the dust removal pipe 15 and the third valve body 152. When the user opens the fourth valve body 154 and starts the vibration motor, the mixture of alkaline powder particles and dust particles in the storage tank 151 can flow out.

[0079] The bag filter module also includes a first electrical cabinet; the first motor 18 and the vibration motor are respectively connected to the electrical cabinet via wires and signal lines; the first electrical cabinet is connected to the external power supply and the external computer via wires and signal lines, and the computer controls the start-stop and other working states of the first motor 18 and the vibration motor in this invention through the first electrical cabinet.

[0080] Reference Figure 1 and Figure 2 The air inlet pipe 14 is connected to the lower outer edge of the second cavity 12. The air inlet pipe 14 is located below the bag filter element 4. Large-volume alkaline powder particles flowing in through the air inlet pipe 14 can directly settle at the bottom of the second cavity 12 instead of moving upward and contacting the bag filter element 4 (so only small-volume alkaline powder particles need to be filtered out by the bag filter element 4), thereby improving the service life of the bag filter element 4 and reducing the maintenance frequency.

[0081] Reference Figure 2 and Figure 3 The stop seat 43 is cylindrical. Since the end face diameter of the stop seat 43 is larger than the maximum inner diameter of the ring 51, the stop seat 43 can stop the ring 51, preventing it from detaching from the bag filter element 4 due to excessive rotation speed of the second cylinder 3. A rubber ring is fixedly installed on the upper end face of the stop seat 43 (e.g., by bolts). When the end face of the ring 51 impacts the upper end face of the stop seat 43, the rubber ring acts as a buffer, reducing impact damage and noise.

[0082] Reference Figure 2 and Figure 3Since the air inlet pipe 14 is located below the bag filter element 4, the overall flow direction of the air-powder mixture in the second cavity 12 is from bottom to top. Therefore, more alkaline powder particles and dust particles adhere to the lower and middle parts of the bag filter element 4 rather than the upper part. Thus, compared to the solution of installing a compression spring between the dust removal ring 5 and the stop seat 43, the tension spring 6 used in this invention can be adapted to clean the lower and middle parts of the bag filter element 4 (in the compression spring solution, the dust removal ring 5 moves back and forth and brushes more in the upper and middle parts of the bag filter element 4, while the alkaline powder / dust particles...). The lower part of the bag filter element 4, which has the highest density, cannot be cleaned frequently; and both the compression spring and the tension spring 6 will have a certain amount of space when they reach their compression limit, and cleaning cannot be performed within this range, which is the cleaning blind zone; while the cleaning blind zone in the compression spring scheme is located at the bottom of the bag filter element 4 where the density of alkaline powder particles / dust particles is the highest, the cleaning blind zone in this invention is located at the top of the bag filter element 4 where the density of alkaline powder particles / dust particles is the lowest. Therefore, this invention has a better cleaning effect.

[0083] The first cylinder 2, the second cylinder 3, the top cylinder 41, the support column 42, the stop seat 43, the tension spring 6, and the ring 51 are all made of stainless steel.

[0084] The first bearing 22, the second bearing 23, and the third bearing 182 are all dustproof bearings, thus preventing them from seizing.

[0085] The bag filter module has a simple structure and reliable function. It uses a dust removal ring 5 with bristles 52 to clean the alkaline powder particles adhering to the bag filter element 4. This avoids the use of high-pressure airflow, thus avoiding the risk of the bag filter element 4 bursting. At the same time, it reduces the number of times the bag filter element 4 expands and bends, thereby improving its service life.

[0086] As the gas-powder mixture flows into the second cavity 12 through the air inlet pipe 14, the first motor 18 drives the first cylinder 2, the second cylinder 3, and the bag filter element 4 to rotate slowly (0.5 revolutions / second to 3 revolutions / second). The lower bag filter elements 4 then pass through the inner port of the air inlet pipe 14 in sequence. As a result, the alkaline powder particles will adhere evenly to the lower bag filter elements 4, rather than being concentrated on a single bag filter element 4. This improves the uniformity of the alkaline powder particle distribution and avoids the problem of excessive alkaline powder particles adhering to a single bag filter element 4, making it difficult to clean.

[0087] Reference Figure 14The caustic soda flake crushing production line includes a bag filter module, a crusher 7, a conveyor belt 8, and a dust-proof chamber 9. Both the crusher 7 and the conveyor belt 8 are housed within the dust-proof chamber 9. A hopper 81 is inserted into (and bolted to) the floor of the dust-proof chamber 9, with its top located below one end of the conveyor belt 8 and its bottom connected to a reaction tank 82. The crusher 7 is mounted on a support structure above the end of the conveyor belt 8 furthest from the hopper 81. This support structure is a standard, existing technology in the industry, and its specific structure will not be described in detail.

[0088] Reference Figure 14 The crusher 7 can crush caustic soda flaking plates to obtain caustic soda flakes. When the operator is extracting rare earth chloride from monazite, the caustic soda flakes are put into the reaction tank 82 and stirred to achieve a rapid reaction. There are multiple conveyor belts 8. When different conveyor belts 8 are started, they can transport the caustic soda flakes produced by the crusher 7 to the hoppers 81 at different positions of the reaction tank 82, thereby realizing material distribution.

[0089] Reference Figure 14 The roof of the dust-proof chamber 9 is equipped with a cover plate 91 for adding caustic soda flakes into the crusher 7; the roof of the dust-proof chamber 9 has an opening, and the cover plate 91 is installed in the opening. An air pump 92 is installed on the outer wall of the dust-proof chamber 9. The air inlet of the air pump 92 is connected to the inner cavity of the dust-proof chamber 9 through an extraction pipe, and the exhaust port of the air pump 92 is connected to the inlet pipe 14. The air pump 92 is used to extract the air-powder mixture from the inner cavity of the dust-proof chamber 9 and transport it into the bag filter module. A window that can be opened and closed is provided on the wall of the dust-proof chamber 9 away from the air pump 92. Opening the window allows the user to balance the air pressure inside and outside the dust-proof chamber 9; furthermore, outside air flows in from one end of the air pump 92, increasing the airflow throughout the entire space of the dust-proof chamber 9, allowing as much air-powder mixture as possible to be captured by the air pump 92, thus improving the dust removal effect.

[0090] After a period of operation, a large amount of alkali powder particles will accumulate on the floor of the dust-proof room 9, requiring regular cleaning and recycling by the users.

[0091] Reference Figure 14The cover plate 91 can be opened and closed (one end of the cover plate 91 is hinged to the roof of the dust-proof chamber 9, and the other end is connected to the roof of the dust-proof chamber 9 via a spring buckle); the cover plate 91 is located above the top opening of the crusher 7, and the operator can open the cover plate 91 to put the alkali board into the crusher 7. After the operator closes the cover plate 91, the inner cavity of the dust-proof chamber 9 is separated from the outside, and the dust (alkali powder particles) generated during the crushing process of the crusher 7 and the conveyor belt 8 is confined to the inner cavity of the dust-proof chamber 9 to prevent leakage, thereby reducing environmental pollution. In the traditional technology, when the operator opens the cover plate 91, some dust (alkali powder particles) will flow out through the opening, which will harm the health of the operator who puts the alkali board and cause environmental pollution in the processing workshop; to avoid such problems, the air pump 92 needs to be started before opening the cover plate 91, so that the opening will generate an inward airflow instead of an outward diffuse airflow, which can effectively reduce the problem of dust (alkali powder particles) overflowing.

[0092] A sealing strip is provided between the cover plate 91 and the opening; if the air pump 92 is turned on for a long time, it will cause a large negative pressure in the dust isolation chamber 9, so the cover plate 91 cannot be opened manually. At this time, it is necessary to open the pressure relief valve on the cover plate 91 to increase the air pressure inside the dust isolation chamber 9.

[0093] The caustic soda flakes crushing and processing production line also includes a second electrical cabinet. The crusher 7, conveyor belt 8, and air pump 92 are respectively connected to the electrical cabinet via wires and signal lines. The second electrical cabinet is connected to the external power supply and external computer via wires and signal lines. The computer controls the start-up and shutdown of the crusher 7, conveyor belt 8, and air pump 92 in this invention through the electrical cabinet.

[0094] Reference Figure 14 The dust-free chamber 9, reaction vessel 82, and bag filter module are all supported by a support frame 93 and fixed with bolts. The support frame 93 is standard existing technology in the industry and will not be described in detail. The first electrical cabinet and the second electrical cabinet are respectively fixedly installed on the support frame 93 with bolts.

[0095] The dust removal method for the caustic soda flake crushing production line includes methods for extracting caustic soda particles and methods for recovering caustic soda particles.

[0096] The method for extracting alkali powder particles includes the following steps:

[0097] A1. Start the air pump 92, then open the cover 91 to allow outside air to flow into the dust-proof chamber 9. During this process, the air pump 92 can extract the air-powder mixture from the dust-proof chamber 9 and press it into the bag filter module. The alkaline powder particles in the air-powder mixture are blocked by the bag filter element 4 and fall to the bottom of the first chamber 11. The gas in the air-powder mixture passes through the bag filter element 4 and is discharged through the air outlet pipe 16. During the process, it is necessary to monitor the liquid level in the reaction tank 82 (for example, using an electronic level gauge inserted into the reaction tank 82). When the liquid level in the reaction tank 82 is higher than the warning value, turn off the air pump 92.

[0098] A2. Turn off the air pump 92 and the cover plate 91.

[0099] The method for recovering alkali powder particles includes the following steps:

[0100] S1. Turn off the air pump 92; then turn on the third valve body 152 and the vibration motor to allow the alkaline powder particles accumulated at the bottom of the first chamber 11 to slide into the storage tank 151.

[0101] S2, Close the third valve body 152.

[0102] S3. Start the first motor 18, rotate the second cylinder 3 and the bag filter element 4, so that the dust removal ring 5 moves and brushes off the alkaline powder particles adhering to the surface of the bag filter element 4 (at this time, the third valve body 152 is in the closed state, which can avoid the problem of the airflow generated by the rotation of the bag filter element 4 blowing away the alkaline powder particles that have already been deposited).

[0103] S4. Turn off the first motor 18 to stop rotating the second cylinder 3 and the bag filter element 4.

[0104] S5. Open the third valve body 152, and the alkaline powder particles slide into the storage tank 151.

[0105] S6. Close the third valve body 152 and the vibration motor.

[0106] Step S3 further includes the following steps:

[0107] S31. The first motor 18 drives the second cylinder 3 to rotate faster, so that the dust removal ring 5 slides from the middle of the bag filter element 4 to the bottom under the action of centrifugal force.

[0108] S32. The first motor 18 drives the second cylinder 3 to rotate at a reduced speed, so that the dust removal ring 5 slides from the bottom end of the bag filter element 4 to the middle under the tension of the tension spring 6.

[0109] S33. Repeat steps S31 to S32 several times (usually 5-15 times), and (second cylinder 3) rotates clockwise on the odd-numbered times and counterclockwise on the even-numbered times, so that the dust removal ring 5 moves back and forth along the axial direction of the bag filter element 4 while swinging.

[0110] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0111] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0112] In conclusion, for those skilled in the art, any changes, modifications, substitutions, or variations made to this invention based on the guidance of this invention, without departing from the principles and spirit of this invention, still fall within the protection scope of this invention.

Claims

1. A bag filter module, characterized in that: The device includes a housing (1), which contains a first cavity (11) and a second cavity (12) located below the first cavity (11). The side wall of the housing (1) is provided with an air inlet pipe (14), a dust outlet pipe (15), and an air outlet pipe (16). The air inlet pipe (14) is connected to the lower outer edge of the second cavity (12), the dust outlet pipe (15) is connected to the bottom end of the second cavity (12), and the air outlet pipe (16) is connected to the first cavity (11). A partition (13) is provided at the junction of the first cavity (11) and the second cavity (12); The first cavity (11) is provided with a first cylinder (2), and the side wall of the first cylinder (2) is provided with a vent (21) for communicating with the first cavity (11); the second cavity (12) is provided with a second cylinder (3) connected and communicating with the first cylinder (2); a cloth bag filter (4) is connected to the outer side wall of the second cylinder (3). The outer periphery of the bag filter element (4) is fitted with a dust removal ring (5) and a tension spring (6). The top end of the tension spring (6) is connected to the bag filter element (4), and the bottom end is connected to the dust removal ring (5). The first cylinder (2), the second cylinder (3), and the bag filter element (4) can rotate synchronously; the second cylinder (3) can accelerate its rotation, causing the dust removal ring (5) to slide from the middle of the bag filter element (4) to the bottom under the action of centrifugal force; the second cylinder (3) can decelerate its rotation, causing the dust removal ring (5) to slide from the bottom of the bag filter element (4) to the middle under the action of the tension spring (6); The second cylindrical body (3) has a vent hole (31) on its side wall for connecting the inner cavity of the bag filter element (4).

2. The bag filter module according to claim 1, characterized in that: The dust removal ring (5) includes a ring body (51) and bristles (52); the bristles (52) are arranged radially along the filter bag (4); one end of the bristles (52) is fixedly connected to the inner wall of the ring body (51), and the other end is pressed against the outer surface of the filter bag (4); The outer surface of the ring (51) is provided with a vertically arranged wind-facing plate (53) at the top or bottom; when the rotation speed or rotation direction of the second cylinder (3) changes, the wind-facing plate (53) swings due to the change in wind resistance (531) it bears, so as to drive the bristles (52) to swing.

3. The bag filter module according to claim 2, characterized in that: The filter bag (4) includes a top cylinder (41), a support column (42), a stop seat (43), and a filter bag tube (44); the top cylinder (41) is fixedly connected to the second cylinder (3); the support column (42) is provided in a plurality of regular polygonal arrays between the top cylinder (41) and the stop seat (43); the top and bottom ends of the support column (42) are fixedly connected to the top cylinder (41) and the stop seat (43) respectively; the filter bag tube (44) is covered and disposed on the outer periphery of the support column (42), and the top and bottom ends of the filter bag tube (44) are fixedly connected to the top cylinder (41) and the stop seat (43) respectively.

4. The bag filter module according to claim 3, characterized in that: Both the first cylinder (2) and the second cylinder (3) are vertically arranged; a first motor (18) is installed at the top plate (17) of the shell (1), and the top of the first cylinder (2) is coaxially arranged and fixedly connected with the first output shaft (181) of the first motor (18).

5. The bag filter module according to claim 4, characterized in that: The bottom end of the dust outlet pipe (15) is connected to and communicates with a storage tank (151), and the bottom end of the storage tank (151) is connected to and communicates with a discharge pipe (153); a third valve body (152) is provided in the middle of the dust outlet pipe, and a fourth valve body (154) is provided at the end of the discharge pipe (153); a vibration motor is installed at the bottom of the outer wall of the shell (1).

6. The bag filter module according to claim 5, characterized in that: The partition (13) has a first mounting hole at its center, and a first bearing (22) is installed at the bottom of the outer wall of the first cylinder (2). The first bearing (22) is installed in the first mounting hole. The bottom surface of the top plate (17) has an upper recessed hole, and a second bearing (23) is installed at the top of the outer wall of the first cylinder (2). The second bearing (23) is installed in the upper recessed hole.

7. The bag filter module according to claim 6, characterized in that: The air intake pipe (14) is located below the bag filter element (4).

8. The bag filter module according to claim 7, characterized in that: The stop seat (43) is cylindrical; the end face diameter of the stop seat (43) is larger than the maximum inner diameter of the ring (51).

9. A caustic soda flake crushing and processing production line, characterized in that: The bag filter module according to any one of claims 5-8 further includes a crusher (7), a conveyor belt (8), and a dust-proof chamber (9); the crusher (7) and the conveyor belt (8) are both located in the dust-proof chamber (9); a hopper (81) is inserted into the floor of the dust-proof chamber (9), the top of the hopper (81) is located below one end of the conveyor belt (8), and the bottom end is connected to the reaction tank (82); The roof of the dust-proof chamber (9) is provided with a cover plate (91) for adding caustic soda flakes into the crusher (7). An air pump (92) is provided on the outer wall of the dustproof chamber (9). The air inlet of the air pump (92) is connected to the inner cavity of the dustproof chamber (9) through an air extraction pipe, and the exhaust port of the air pump (92) is connected to the air inlet pipe (14).

10. A dust removal method for a caustic soda flake crushing production line, characterized in that: The method for dust removal in the caustic soda flake crushing production line as described in claim 9 includes a method for extracting caustic soda particles and a method for recovering caustic soda particles. The extraction method includes the following steps. A1. Start the air pump (92) and then open the cover plate (91) to allow outside air to flow into the inner cavity of the dust-proof chamber (9) through the cover plate (91); during the process, the air pump (92) can extract the air-powder mixture in the dust-proof chamber (9) and press it into the bag filter module; the alkaline powder particles in the air-powder mixture are blocked by the bag filter element (4) and fall to the bottom of the first cavity (11), and the gas in the air-powder mixture passes through the bag filter element (4) and is discharged through the air outlet pipe (16); A2. Turn off the air pump (92) and the cover plate (91); The recycling method includes the following steps. S1. Turn off the air pump (92); then turn on the third valve body (152) and the vibration motor to allow the alkaline powder particles accumulated at the bottom of the first cavity (11) to slide into the storage tank (151). S2. Close the third valve body (152); S3. Rotate the second cylinder (3) and the bag filter element (4) to move the dust removal ring (5) and brush off the alkaline powder particles adhering to the surface of the bag filter element (4); S4. Stop rotating the second cylinder (3) and the bag filter element (4); S5. Open the third valve body (152), and the alkaline powder particles slide into the storage tank (151). S6. Close the third valve body (152) and the vibration motor; Step S3 further includes the following steps: S31. The first motor (18) drives the second cylinder (3) to rotate faster, so that the dust removal ring (5) slides from the middle of the bag filter element (4) to the bottom under the action of centrifugal force; S32. The first motor (18) drives the second cylinder (3) to decelerate and rotate, so that the dust removal ring (5) slides from the bottom end of the bag filter element (4) to the middle under the tension of the tension spring (6); S33. Repeat steps S31 to S32 several times to make the dust removal ring (5) move back and forth along the axial direction of the bag filter element (4).

Images