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

Abstract

The invention discloses a cloth bag dust removal module, a caustic soda flake crushing treatment production line and a dust removal method, and relates to the technical field of caustic soda flake dust removal. The cloth bag dust removal module comprises a shell, and a first cavity and a second cavity are formed in the shell; a first cylinder is arranged in the first cavity, and a vent hole used for being communicated with the first cavity is formed in the side wall of the first cylinder; a second barrel is arranged in the second cavity; the outer side wall of the second barrel is connected with a cloth bag filter element; the top end of the tension spring is connected with the cloth bag filter element, and the bottom end of the tension spring is connected with the dust removal ring. And the cloth bag dust removal module can filter a gas-powder mixture to realize collection of alkali powder particles, so that pollution to a processing workshop and external air is reduced. The cloth bag filter element is alternately accelerated and decelerated, so that the dust removal ring is driven to reciprocate along the axial direction of the cloth bag filter element, and alkali powder particles adhered to the surface of the cloth bag filter element are brushed off. Use of high-pressure airflow is avoided, the risk that the cloth bag filter element is burst is avoided, and the service life can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flake alkali dust removal, in particular to a cloth bag dust removal module, a flake alkali crushing treatment production line and a dust removal method. BACKGROUND

[0002] When extracting chlorinated rare earth in monazite, a large amount of alkaline solvent is needed for chemical reaction. There are two ways to put alkaline solvent, one is to directly put alkaline solvent into the reaction tank, and the other is to put flake alkali and stir. Among them, the alkali liquor has a large water content, so its weight is large, whether it is storage or transportation is more inconvenient; flake alkali needs to be crushed when used, and the alkali plate has better storage and transportation performance.

[0003] Dust pollution will be generated when the alkali plate is crushed, at the same time, dust pollution will also be generated when the flake alkali is transported on the conveying belt (for example, dumping between different conveying belts); and dust pollution escaping to outside the processing workshop will cause air pollution.

[0004] The cloth bag dust removal machine, also known as the bag type dust collector, is a commonly used dust removal equipment. The cloth bag in the cloth bag dust removal machine is made of woven filter cloth or non-woven felt, which can filter solid particles in gas-powder mixture. After long-term use of the cloth bag dust removal machine, the problem of cloth bag blockage will occur; in the traditional technology, high-pressure airflow is usually used for backwashing to clean the solid particles adhered on the cloth bag, but such method often causes the cloth bag to be torn or injured. SUMMARY

[0005] In order to overcome the problem of "the cleaning form of backwashing has the risk of tearing the cloth bag" in the above background technology, the present application provides a cloth bag dust removal module, a flake alkali crushing treatment production line and a dust removal method.

[0006] The technical solution adopted by the present application to solve the above technical problems is: The dust removal module comprises a shell, a first cavity and a second cavity arranged below the first cavity are arranged in the shell, a gas inlet pipe, a dust outlet pipe and a gas outlet pipe are arranged on the side wall of the shell, the gas inlet pipe is communicated with the lower edge of the second cavity, the dust outlet pipe is communicated with the bottom end of the second cavity, the gas outlet pipe is communicated with the first cavity, a partition plate is arranged at the joint of the first cavity and the second cavity, a first cylinder is arranged in the first cavity, a ventilation hole for communicating the first cavity is arranged on the side wall of the first cylinder, a second cylinder connected with the first cylinder is arranged in the second cavity, a cloth bag filter element is connected with the outer side wall of the second cylinder, a dust removal ring and a tension spring are arranged on the outer periphery of the cloth bag filter element, the top end of the tension spring is connected with the cloth bag filter element, and the bottom end of the tension spring is connected with the dust removal ring, the first cylinder, the second cylinder and the cloth bag filter element can rotate synchronously, the second cylinder can accelerate rotation, so that the dust removal ring slides from the middle part to the bottom end of the cloth bag filter element under the action of centrifugal force, the second cylinder can decelerate rotation, so that the dust removal ring slides from the bottom end to the middle part of the cloth bag filter element under the action of the tension force of the tension spring, and a gas permeable hole for communicating the inner cavity of the cloth bag filter element is arranged on the side wall of the second cylinder.

[0007] As a further optimization scheme of the application, the dust removal ring comprises a ring body and bristles, the bristles are arranged along the radial direction of the cloth bag filter element, one end of the bristles is fixedly connected with the inner wall of the ring body, and the other end of the bristles is press-bonded with the outer surface of the cloth bag filter element, the top end or the bottom end of the outer surface of the ring body is provided with a vertically arranged windward plate, when the rotation speed of the second cylinder changes or the rotation direction of the second cylinder changes, the windward plate swings due to the change of the wind resistance borne by the windward plate, so as to drive the bristles to swing.

[0008] As a further optimization scheme of the application, the cloth bag filter element comprises a top cylinder, a support column, a stop seat and a cloth bag cylinder, the top cylinder is fixedly connected with the second cylinder, a plurality of support columns are arranged in a regular polygon array between the top cylinder and the stop seat, the top and bottom ends of the support column are fixedly connected with the top cylinder and the stop seat respectively, and the cloth bag cylinder is arranged around the support column, and the top and bottom ends of the cloth bag cylinder are fixedly connected with the top cylinder and the stop seat respectively.

[0009] As a further optimization scheme of the application, the first cylinder and the second cylinder are vertically arranged, a first motor is installed at the top plate of the shell, and the top end of the first cylinder is coaxially arranged and fixedly connected with the first output shaft of the first motor.

[0010] As a further optimization scheme of the present application, the dust outlet 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 arranged in the middle of the dust removal pipe, and a fourth valve body is arranged at the end of the discharge pipe; and a vibration motor is mounted on the bottom end of the outer side wall of the shell.

[0011] As a further optimization scheme of the present application, a first mounting hole is arranged at the center of the partition plate, a first bearing is mounted on the bottom end of the outer side wall of the first cylinder, and the first bearing is mounted in the first mounting hole; and an upper recess is arranged on the bottom surface of the top plate, and a second bearing is mounted on the top end of the outer side wall of the first cylinder, and the second bearing is mounted in the upper recess.

[0012] As a further optimization scheme of the present application, the air inlet pipe is arranged below the cloth bag filter element.

[0013] As a further optimization scheme of the present application, the stop seat is in a cylindrical shape; and the diameter of the end face of the stop seat is greater than the maximum inner diameter of the ring body.

[0014] The flake caustic crushing treatment production line comprises a cloth bag dust removal module, and further comprises a crusher, a conveying belt and a dust isolation chamber; the crusher and the conveying belt are arranged in the dust isolation chamber; a hopper is inserted into the floor of the dust isolation chamber, the top end of the hopper is located below one end of the conveying belt, and the bottom end of the hopper communicates with a reaction tank; a cover plate for feeding flake caustic into the crusher is arranged on the roof of the dust isolation chamber; an air pump is arranged on the outer side wall of the dust isolation chamber, the air inlet of the air pump communicates with the inner cavity of the dust isolation chamber through a suction pipe, and the air outlet of the air pump communicates with the air inlet pipe.

[0015] The dust removal method of the flake caustic crushing treatment production line is a method for removing dust from the flake caustic crushing treatment production line, and comprises a method for extracting alkali powder particles and a method for recycling alkali powder particles.

[0016] The extraction method comprises the following steps: A1, starting the air pump, and then opening the cover plate to allow external air to flow into the inner cavity of the dust isolation chamber; during the process, the air pump can extract the gas-powder mixture in the dust isolation chamber and press it into the cloth bag dust removal module; the alkali powder particles in the gas-powder mixture are blocked by the cloth bag filter element and fall to the bottom of the first cavity, and the gas in the gas-powder mixture passes through the cloth bag filter element and is discharged through the air outlet pipe; A2, closing the air pump and the cover plate.

[0017] The recovery method comprises the following steps: S1, closing the air pump, then opening the third valve body and the vibration motor, so that the alkali powder particles accumulated at the bottom of the first cavity fall into the storage tank; S2, closing the third valve body; S3, rotating the second cylinder body and the cloth bag filter core, so that the dust removal ring moves and brushes off the alkali powder particles adhered to the surface of the cloth bag filter core; S4, stopping rotating the second cylinder body and the cloth bag filter core; S5, opening the third valve body, so that the alkali powder particles fall into the storage tank; S6, closing the third valve body and the vibration motor.

[0018] Step S3 further comprises the following steps: S31, the first motor drives the second cylinder body to accelerate rotation, so that the dust removal ring slides from the middle part of the cloth bag filter core to the bottom end under the action of centrifugal force; S32, the first motor drives the second cylinder body to decelerate rotation, so that the dust removal ring slides from the bottom end of the cloth bag filter core to the middle part under the action of the pulling force of the tension spring; S33, repeating steps S31-S32 several times, so that the dust removal ring reciprocally moves along the axial direction of the cloth bag filter core.

[0019] In summary, the present application has at least one of the following advantages: (1) The cloth bag dust removal module can filter the gas-powder mixture and collect the alkali powder particles, thereby reducing the pollution of the processing workshop and the external air; the dust removal ring containing the bristles is used to brush off the alkali powder particles adhered to the cloth bag filter core, thereby avoiding the use of high-pressure gas flow, the risk of the cloth bag filter core being broken, and the number of times of the cloth bag filter core being expanded and bent, so as to improve the service life.

[0020] (2) The first cylinder body, the second cylinder body and the cloth bag filter core can accelerate rotation, so that the dust removal ring slides from the middle part of the cloth bag filter core to the bottom end under the action of centrifugal force; the first cylinder body, the second cylinder body and the cloth bag filter core can decelerate rotation, so that the dust removal ring slides from the bottom end of the cloth bag filter core to the middle part under the action of the pulling force of the tension spring; the first cylinder body, the second cylinder body and the cloth bag filter core alternately accelerate and decelerate, thereby driving the dust removal ring to reciprocally move along the axial direction of the cloth bag filter core, so as to increase the brushing range of the cloth bag filter core and enhance the cleaning effect.

[0021] (3) The outer surface of the ring body is provided with a windward plate. When the rotation speed of the second cylinder body changes or the rotation direction changes, the windward plate swings due to the change of the wind resistance borne by the windward plate, thereby driving the bristles to swing, so as to improve the brushing effect of the cloth bag filter core.

[0022] (4) The cloth bag filter core is arranged obliquely. The air inlet pipe is located below the cloth bag filter core, so the overall flow direction of the gas-powder mixture in the second cavity is from bottom to top, and therefore more alkali powder particles and dust particles adhere to the lower part of the cloth bag filter core than to the upper part. Compared with the technical solution of using a compression spring, the present application uses a tension spring to drive the dust removal ring to move, so the moving range of the dust removal ring is more in the lower part of the cloth bag filter core, where the density of alkali powder particles is relatively large; and the cleaning blind area generated by the tension spring in the compression limit state is located at the top end of the cloth bag filter core, where the density of alkali powder particles is smaller, so the present application further improves the cleaning effect.

[0023] (5) During the process of flowing of the gas-powder mixture into the second cavity through the air inlet pipe, the first motor can drive the first cylinder, the second cylinder and the cloth bag filter core to rotate slowly, so the several cloth bag filter cores located below pass through the inner port position of the air inlet pipe in turn, and then alkali powder particles are uniformly adhered to the several cloth bag filter cores located below instead of mainly adhering to one cloth bag filter core, so that the uniformity of the distribution of alkali powder particles is improved, and the problem that a single cloth bag filter core adheres too many alkali powder particles and is difficult to clean is avoided.

[0024] (6) The crusher and the conveying belt are both located in the dust isolation chamber. During the operation, the air pump is started first and then the cover plate is opened, so that the opening position generates an inward airflow instead of an outward diffusion airflow, which can effectively reduce the problem of overflow of alkali powder particles, thereby protecting the health and safety of the alkali plate delivery personnel and effectively reducing the dust pollution in the processing workshop.

[0025] (7) During the operation, the alkali powder particles in the deposition state are placed in the storage tank first, and then the third valve body is closed before the cloth bag filter core is rotated, which can avoid the problem that the airflow generated by the rotation of the cloth bag filter core blows away the alkali powder particles that have been deposited, thereby facilitating the recycling of the alkali powder particles. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in conjunction with the drawings: Figure 1 It is a schematic view of the overall structure of the present application in a front view and a cross section; Figure 2 It is a schematic view of the positions and structures of the first cylinder, the second cylinder, the cloth bag filter core and the dust removal ring in a front view and a cross section; Figure 3 It is a schematic view of the structure of the cloth bag filter core in a front view and a cross section; Figure 4 It is a schematic view of the position of the dust removal ring in a tension state; Figure 5 It is a schematic view of the structure of the dust removal ring in a front view and a cross section; Figure 6 It is a schematic view of the structure of the cloth bag filter core and the dust removal ring in a cross section; Figure 7The first cylinder installation position and structure schematic diagram of front view; Figure 8 The cloth bag cylinder and installation fin connection structure schematic diagram; Figure 9 The cloth bag cylinder and installation fin connection structure schematic diagram; Figure 10 The cloth bag cylinder and installation fin connection structure schematic diagram; Figure 11 The cloth bag cylinder and installation fin connection structure schematic diagram; Figure 12 The cloth bag cylinder and installation fin connection structure schematic diagram; Figure 13 The cloth bag cylinder and installation fin connection structure schematic diagram; Figure 14 The cloth bag cylinder and installation fin connection structure schematic diagram;

[0027] Explanation of reference signs: In the drawings, 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; 2, first cylinder; 21, air hole; 22, first bearing; 23, second bearing; 3, second cylinder; 31, air hole; 32, first fin; 33, 4, cloth bag filter element; 41, top cylinder; 411, installation fin; 412, reinforcing ring; 413, first installation ring; 42, support column; 43, stop seat; 431, second installation ring; 44, cloth bag cylinder; 5, dust removal ring; 51, ring body; 511, third installation ring; 52, brush; 53, wind board; 531, wind resistance; 6, tension spring; 61, pull block; 62, first rectangular slot; 63, second rectangular slot; 7, crusher; 8, conveying belt; 81, hopper; 82, reaction tank; 9, dust isolation chamber; 91, cover plate; 92, air pump; 93, support frame. DETAILED DESCRIPTION

[0028] According to the above structure characteristics of the application, the embodiments of the application are further described: Refer to Figures 1-2The embodiment provides a cloth bag dust removal module. The cloth bag dust removal module comprises a shell 1, a first cavity 11 and a second cavity 12 arranged below the first cavity 11 are arranged in the shell 1. The first cavity 11 is in a cylindrical shape; the upper part of the second cavity 12 is in a cylindrical shape and the lower part of the second cavity 12 is in an inverted conical shape. An air inlet pipe 14, a dust outlet pipe 15 and an air outlet pipe 16 are arranged on the side wall of the shell 1 (for example, the air inlet pipe 14, the dust outlet pipe 15 and the air outlet pipe 16 are fixedly and sealingly connected through welding or fixedly and sealingly connected through bolts and sealing rings). A first valve body is arranged in the middle of the air inlet pipe 14, and a second valve body is arranged in the middle of the air outlet pipe 16. When dust removal is needed, the first valve body and the second valve body are opened, so that the air pressure inside and outside the shell 1 is balanced; when dust removal is not needed, the first valve body and the second valve body are closed, water vapor enters the shell 1, and then the problem that alkali powder particles accumulated on the inner wall of the shell 1 are hardened is avoided, so that the alkali powder particles are conveniently collected in the later stage.

[0029] Referring to Figure 1 With Figure 2 , the dust outlet pipe 15 is in communication with the bottom tip position of the second cavity 12, and the air outlet pipe 16 is in communication with the first cavity 11; so that the settled alkali powder particles gather at the bottom of the second cavity 12 and flow into the dust outlet pipe 15 to discharge the second cavity 12.

[0030] Referring to Figure 1 With Figure 2 , a partition plate 13 is arranged at the junction position of the first cavity 11 and the second cavity 12; the partition plate 13 is used for separating the first cavity 11 and the second cavity 12, so that the first cavity 11 and the second cavity 12 form independent spaces.

[0031] Referring to Figure 1 , Figure 2 , Figure 3 With Figure 7 , the first cavity 11 is provided with a first cylinder 2, and the side wall of the first cylinder 2 is provided with a plurality of air holes 21 for communicating with the first cavity 11. The air holes 21 are arranged in an array along the cylindrical surface of the first cylinder 2. The second cavity 12 is provided with a second cylinder 3 connected with the first cylinder 2 and in communication with the first cylinder 2 (the bottom end of the first cylinder 2 is in an open structure, and the top end of the second cylinder 3 is in an open structure, so that the inner cavities of the first cylinder 2 and the second cylinder 3 are in communication). The side wall of the second cylinder 3 is provided with a plurality of air permeable holes 31 for communicating with the inner cavity of a cloth bag filter element 4. The gas in the gas-powder mixture flows through the air inlet pipe 14, the second cavity 12, the cloth bag filter element 4, the air permeable holes 31, the inner cavity of the second cylinder 3, the inner cavity of the first cylinder 2, the air holes 21, the first cavity 11 and the air outlet pipe 16 in sequence, and is discharged.

[0032] Referring to Figure 2 With Figure 3, the second cylinder body 3 outer side wall position is connected with cloth bag filter core 4, cloth bag filter core 4 is away from the end of second cylinder body 3 and is set to the horizontal plane as the reference to the downward inclination (inclination angle is 30 degrees~60 degrees). Cloth bag filter core 4 is provided with several and is set to the circumferential array along the cylindrical surface of second cylinder body 3, to increase the filtering efficiency.

[0033] Referring to Figure 2 With Figure 3 , the outer periphery of cloth bag filter core 4 is provided with dust removal ring 5 and tension spring 6, the top end of tension spring 6 is connected with cloth bag filter core 4, and the bottom end is connected with dust removal ring 5. Dust removal ring 5 can reciprocate along the axis of cloth bag filter core 4 under the combined action of centrifugal force and the elastic force of tension spring 6, so as to brush off the (small volume) alkali powder particles and dust particles adhered to the outer surface of cloth bag filter core 4 (refer to Figure 14 , the air flowing in through the cover plate 91 will mix with dust particles).

[0034] Referring to Figures 2-4 , the first cylinder body 2, the second cylinder body 3 and the cloth bag filter core 4 can rotate synchronously (with the axis of the first cylinder body 2 as the center). The first cylinder body 2, the second cylinder body 3 and the cloth bag filter core 4 can rotate at an accelerated speed, so that the dust removal ring 5 slides from the middle part to the bottom end of the cloth bag filter core 4 under the action of centrifugal force (at this time, the centrifugal force is greater than the tension of the tension spring 6, and the specific speed is related to the mass of the dust removal ring 5, which can be evaluated through a limited number of experiments); the first cylinder body 2, the second cylinder body 3 and the cloth bag filter core 4 can rotate at a decelerated speed, so that the dust removal ring 5 slides from the bottom end to the middle part of the cloth bag filter core 4 under the action of the tension of the tension spring 6 (at this time, the centrifugal force is less than the tension of the tension spring 6, and the specific speed is related to the mass of the dust removal ring 5, which can be evaluated through a limited number of experiments). The first cylinder body 2, the second cylinder body 3 and the cloth bag filter core 4 alternately accelerate and decelerate, so as to drive the dust removal ring 5 to reciprocate along the axial direction of the cloth bag filter core 4, to brush off the alkali powder particles and dust particles adhered to the surface of the cloth bag filter core 4.

[0035] Referring to Figures 5-6 , the dust removal ring 5 includes a ring body 51 and a bristle 52; the bristle 52 is arranged along the radial direction of the cloth bag filter core 4; one end of the bristle 52 is fixedly connected with the inner wall of the ring body 51 (for example, by hot melting connection), and the other end is press-connected with the outer surface of the cloth bag filter core 4. The bristle 52 plays a supporting role between the cloth bag filter core 4 and the ring body 51; the end of the bristle 52 can brush off the alkali powder particles and dust particles adhered to the surface of the cloth bag filter core 4.

[0036] Referring to Figure 4 , Figure 5 With Figure 6, the top end or the bottom end of the outer surface of the ring body 51 is provided with a vertically arranged windward plate 53 (for example, by integral fixed connection or by bolted fixed connection); when the rotation speed of the second cylinder 3 changes or the rotation direction changes, the windward plate 53 and the bristles 52 can be swung, thereby improving the cleaning effect on the cloth bag filter core 4. The windward plate 53 is arranged along the axial direction of the ring body 51. The windward plate 53 is in a straight plate structure, and the windward plate 53 is provided with left and right two windward surfaces. The cloth bag filter core 4 rotates around the first cylinder 2 axis / second cylinder 3 axis, synchronously driving the dust removal ring 5 to rotate around the first cylinder 2 axis / second cylinder 3 axis. In the process, the windward plate 53 is inclined due to the wind resistance 531 (the wind resistance 531 is generated by the relative motion of the windward plate 53 and the air in the shell 1) generated by rotation, thereby driving the ring body 51 (around the cloth bag filter core 4 axis) to rotate; when the rotation speed of the cloth bag filter core 4 (and the dust removal ring 5) changes (for example, acceleration or deceleration) or the rotation direction changes (for example, from clockwise rotation to counterclockwise rotation, or from counterclockwise rotation to clockwise rotation), the size or direction of the wind resistance 531 changes, so that the windward plate 53 can be swung, thereby driving the ring body 51 and the bristles 52 to swing (that is, reciprocating rotation around the cloth bag filter core 4 axis; the rotation range / angle depends on the gap size between the ring body 51 and the cloth bag filter core 4); the bristles 52 can enhance the cleaning effect on the cloth bag filter core 4 (in the cloth bag cylinder 44) during the swinging process, that is, enhance the dust removal effect.

[0037] Referring to Figure 4 , Figure 5 and Figure 6 , when the windward plate 53 rotates, the lower end of the tension spring 6 is twisted, and the tension spring 6 has a restoring tendency, so that the windward plate 53 can be applied with a torque, and the windward plate 53 has a tendency to keep in the middle of the ring body 51; then when the wind resistance 531 decreases, the tension spring 6 can drive the windward plate 53 to rotate to the middle position of the ring body 51.

[0038] Referring to 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.

[0039] 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.

[0040] 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.

[0041] 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).

[0042] ReferenceFigure 2 With Figure 7 The top plate 17 of the shell 1 is sealingly and fixedly connected to the side plate of the shell 1 (for example, sealingly and fixedly connected by bolts and sealing rings or sealingly and fixedly connected by welding). The first motor 18 is installed at the position of the top plate 17 of the shell 1, and the first motor 18 is vertically arranged. The casing of the first motor 18 is fixedly connected to the top plate 17 by bolts. The top end of the first cylinder body 2 is coaxially arranged with and fixedly connected to (for example, fixedly connected by bolts) the first output shaft 181 of the first motor 18. The first output shaft 181 of the first motor 18 can rotate, thereby driving the first cylinder body 2 to rotate, and further driving the second cylinder body 3 and the cloth bag filter element 4 to rotate.

[0043] With reference to Figure 2 With Figure 7 The first mounting hole is arranged at the center position of the partition plate 13. The first bearing 22 is installed at the bottom end of the outer side wall of the first cylinder body 2 and is installed in the first mounting hole. The inner ring and the outer ring of the first bearing 22 are connected by balls. The inner ring of the first bearing 22 is sealingly and fixedly connected to the first cylinder body 2 by bolts and sealing rings. The outer ring of the first bearing 22 is sealingly and fixedly connected to the partition plate 13 by bolts and sealing rings.

[0044] With reference to Figure 2 With Figure 7 The upper recess hole is arranged at the center position of the bottom surface of the top plate 17. The second bearing 23 is installed at the top end of the outer side wall of the first cylinder body 2 and is installed in the upper recess hole. The inner ring and the outer ring of the second bearing 23 are connected by balls. The inner ring of the second bearing 23 is sealingly and fixedly connected to the first cylinder body 2 by bolts and sealing rings. The outer ring of the second bearing 23 is sealingly and fixedly connected to the top plate 17 by bolts and sealing rings.

[0045] With reference to Figure 2 With Figure 7 The second mounting hole is arranged at the center position of the top plate 17. The third bearing 182 is sleeved on the outer side wall of the first output shaft 181 and is installed in the second mounting hole. The inner ring and the outer ring of the third bearing 182 are connected by balls. The inner ring of the third bearing 182 is sealingly and fixedly connected to the first output shaft 181 by bolts and sealing rings. The outer ring of the third bearing 182 is sealingly and fixedly connected to the top plate 17 by bolts and sealing rings.

[0046] With reference to Figure 4 , Figure 8 With Figure 9, the outer side wall of the top cylinder 41 is fixedly provided with a mounting fin 411 (for example, by integral fixed connection), the first mounting ring 413 is arranged at the position of the end face of 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 clampingly fix the upper end of the cloth bag cylinder 44 from both sides (the bolt is inserted into the cloth bag cylinder 44).

[0047] Referring to Figure 4 With Figure 10 , the second mounting ring 431 is arranged at the position of the end face of the support column 42, the stop seat 43 and the second mounting ring 431 are fixedly connected by bolts, and the stop seat 43 and the second mounting ring 431 clampingly fix the bottom end of the cloth bag cylinder 44 from both sides (the bolt is inserted into the cloth bag cylinder 44).

[0048] Referring to Figure 4 With Figure 11 , the third mounting ring 511 is arranged at the position of the end face of the top cylinder 41, and the third mounting ring 511 and the ring body 51 are fixedly connected by bolts. The ring body 51 and the third mounting ring 511 clampingly fix the bottom end of the pull spring 6 from both sides.

[0049] Referring to Figure 9 With 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 clamping grooves capable of adapting to the upper end of the pull spring 6; the end face of the ring body 51 and the end face of the third mounting ring 511 are respectively provided with annular clamping grooves capable of adapting to the bottom end of the pull spring 6.

[0050] Referring to Figure 9 , Figure 11 With Figure 12 , the pull spring 6 is respectively fixedly provided with a pull block 61 (for example, by welding) at both ends, and the pull block 61 is in a cuboid structure. A first rectangular clamping groove 62 is arranged between the mounting fin 411 and the first mounting ring 413, and the pull block 61 located at the upper part is adapted to be clamped in the first rectangular clamping groove 62, so as to avoid the upper end of the pull spring 6 from being pulled out from between the mounting fin 411 and the first mounting ring 413; a second rectangular clamping groove 63 is arranged between the ring body 51 and the third mounting ring 511, and the pull block 61 located at the lower part is adapted to be clamped in the second rectangular clamping groove 63, so as to avoid the lower end of the pull spring 6 from being pulled out from between the ring body 51 and the third mounting ring 511.

[0051] Referring to Figure 13The bottom end of the dust outlet pipe 15 is connected and communicated with a storage tank 151 (for example, the sealing fixed connection is realized by welding), and the bottom end of the storage tank 151 is connected and communicated with a discharge pipe 153 (for example, the sealing fixed connection is realized by welding). The third valve body 152 is arranged in the middle of the dust removal pipe, and the fourth valve body 154 is arranged at the end of the discharge pipe 153; the vibration motor is installed at the bottom end of the outer side wall of the shell 1. The shell of the vibration motor is fixedly connected with the outer side wall of the shell 1 by bolts, and the vibration motor can drive the bottom end of the shell 1 to vibrate, so that the alkali powder particles and dust particles accumulated on the conical surface at the bottom of the second cavity 12 enter the storage tank 151 through the dust outlet pipe 15 and the third valve body 152. The user opens the fourth valve body 154 and starts the vibration motor, so that the mixture of alkali powder particles and dust particles in the storage tank 151 can flow out.

[0052] The cloth bag dust removal module further comprises a first electrical cabinet; the first motor 18 and the vibration motor are respectively connected with the electrical cabinet through wires and signal lines; the first electrical cabinet is connected with an external power supply and an external computer through 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 the application through the first electrical cabinet.

[0053] Referring to Figure 1 With Figure 2 The air inlet pipe 14 is communicated with the lower outer edge position of the second cavity 12, and the air inlet pipe 14 is located below the cloth bag filter core 4, so that the large-volume alkali powder particles flowing into the air inlet pipe 14 can directly settle at the bottom of the second cavity 12, instead of moving upward and contacting the cloth bag filter core 4 (then only small-volume alkali powder particles need to pass through the cloth bag filter core 4 for filtering), thereby prolonging the service life of the cloth bag filter core 4 and reducing the maintenance frequency.

[0054] Referring to Figure 2 With Figure 3 The stop seat 43 is in a cylindrical shape; the end face diameter of the stop seat 43 is greater than the maximum inner diameter of the ring body 51, so that the stop seat 43 can stop the ring body 51, avoiding the problem that the ring body 51 falls off the cloth bag filter core 4 due to too high rotation speed of the second cylinder 3. A rubber ring (for example, fixedly connected by bolts) is fixedly installed on the upper end face of the stop seat 43, and when the end face of the ring body 51 hits the upper end face of the stop seat 43, the rubber ring can play a buffering role, thereby reducing the impact damage and noise.

[0055] Referring to Figure 2 With Figure 3Since the air inlet pipe 14 is located below the cloth bag filter core 4, the overall flow direction of the gas-powder mixture in the second cavity 12 is from bottom to top, so more alkali powder particles and dust particles adhere to the lower part of the cloth bag filter core 4 than to the upper part, and therefore, compared with the scheme of installing a compression spring between the dust removal ring 5 and the stop seat 43, the pull spring 6 adopted by the present application can adapt to the middle and lower part of the cloth bag filter core 4 (in the compression spring scheme, the dust removal ring 5 reciprocates more in the middle and upper part of the cloth bag filter core 4 and is brushed, and the lower part of the cloth bag filter core 4 with the highest density of alkali powder particles / dust particles cannot be cleaned frequently; and no matter the compression spring or the pull spring 6, when reaching the compression limit state, there will be a certain occupancy, and within this range, the cleaning and brushing operation cannot be performed, which is the cleaning and brushing blind area; and in the compression spring scheme, the cleaning and brushing blind area is located at the position with the highest density of alkali powder particles / dust particles at the bottom end of the cloth bag filter core 4, and in the present application, the cleaning and brushing blind area of the pull spring 6 is located at the position with the lowest density of alkali powder particles / dust particles at the top end of the cloth bag filter core 4, so the present application has better cleaning and brushing effect).

[0056] The first cylinder 2, the second cylinder 3, the top cylinder 41, the support column 42, the stop seat 43, the pull spring 6, and the ring body 51 are all made of stainless steel.

[0057] The first bearing 22, the second bearing 23, and the third bearing 182 are all dustproof bearings, so as to avoid jamming.

[0058] The cloth bag dust removal module has simple structure and reliable function, uses the dust removal ring 5 containing the bristles 52 to clean and brush the alkali powder particles adhered to the cloth bag filter core 4, avoids the use of high-pressure airflow, thereby avoiding the risk of the cloth bag filter core 4 being burst, and reducing the number of expansion and bending of the cloth bag filter core 4, so as to improve the service life.

[0059] During the process that the gas-powder mixture flows into the second cavity 12 through the air inlet pipe 14, the first motor 18 can drive the first cylinder 2, the second cylinder 3, and the cloth bag filter core 4 to rotate slowly (the rotation speed is 0.5 revolutions / second-3 revolutions / second), so the several cloth bag filter cores 4 located below pass through the inner port position of the air inlet pipe 14 in turn, and then the alkali powder particles are uniformly adhered to the several cloth bag filter cores 4 located below, rather than mainly concentrated on a single cloth bag filter core 4, so as to improve the uniformity of the distribution of the alkali powder particles and avoid the problem that a single cloth bag filter core 4 adheres too many alkali powder particles and is difficult to clean.

[0060] Reference Figure 14, the sheet alkali crushing treatment production line, including a bag dust removal module, further including a crusher 7, a conveyor belt 8 and a dust isolation chamber 9; the crusher 7 and the conveyor belt 8 are both arranged in the dust isolation chamber 9; a hopper 81 is inserted (and fixedly connected by bolts) in the floor of the dust isolation chamber 9, the top end of the hopper 81 is located below one end of the conveyor belt 8, and the bottom end is in communication with a reaction tank 82. The crusher 7 is erected above the end of the conveyor belt 8 away from the hopper 81 through a support structure, which is a conventional prior art in the industry, and the specific structure will not be described here.

[0061] With reference to Figure 14 , the crusher 7 can crush the alkali plate to obtain sheet alkali; during the extraction of rare earth chlorides in monazite, the user can put the sheet alkali into the reaction tank 82 and stir it to achieve rapid reaction. The conveyor belt 8 is provided with multiple, and when different conveyor belts 8 are started, the sheet alkali produced by the crusher 7 can be conveyed to the hopper 81 at different positions of the reaction tank 82, thereby realizing material distribution.

[0062] With reference to Figure 14 , the roof of the dust isolation chamber 9 is provided with a cover plate 91 for putting sheet alkali into the crusher 7; the roof of the dust isolation chamber 9 is provided with an opening, and the cover plate 91 is installed in the opening. The outer wall of the dust isolation chamber 9 is provided with an air pump 92, the air inlet of the air pump 92 is in communication with the inner cavity of the dust isolation chamber 9 through a suction pipe, and the air outlet of the air pump 92 is in communication with the air inlet pipe 14. The air pump 92 is used to suck the gas-powder mixture in the inner cavity of the dust isolation chamber 9 and convey it into the bag dust removal module. The wall of the dust isolation chamber 9 away from the air pump 92 is provided with an openable window, which can balance the air pressure inside and outside the dust isolation chamber 9; and the outside air flows from one end of the air pump 92, which can increase the air flow of the entire space in the inner cavity of the dust isolation chamber 9, so that as much gas-powder mixture as possible is captured by the air pump 92, improving the dust removal effect.

[0063] After the sheet alkali crushing treatment production line works for a period of time, a large amount of alkali powder particles will accumulate on the floor of the dust isolation chamber 9, and the user needs to clean and recycle it regularly.

[0064] With reference to 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 isolation chamber 9, and the other end is connected to the roof of the dust isolation chamber 9 through a spring pull buckle); the cover plate 91 is located above the opening at the top of the crusher 7, and the user can put the alkali plate into the crusher 7 by opening the cover plate 91. After the user buckles the cover plate 91, the inner cavity of the dust isolation chamber 9 is separated from the outside world, so that the dust (alkali powder particles) generated during the crushing process of the crusher 7 and the conveying process of the conveying belt 8 is limited in the inner cavity of the dust isolation chamber 9 to avoid external leakage, thereby reducing environmental pollution. In the conventional technology, when the user opens the cover plate 91, part of the dust (alkali powder particles) will flow out through the hole, which will harm the health of the workers who put the alkali plate, and will also cause environmental pollution in the processing workshop; in order to avoid such problems, the gas pump 92 needs to be started before the cover plate 91 is opened, and then the opening position will generate an inward flow of air instead of an outward dispersion of air, thereby effectively reducing the problem of dust (alkali powder particles) overflow.

[0065] A sealing strip is provided between the cover plate 91 and the hole; if the gas pump 92 is opened for a long time, a large negative pressure will be generated in the dust isolation chamber 9, so that the cover plate 91 cannot be opened by manpower, at which time the pressure relief valve on the cover plate 91 needs to be opened to increase the air pressure in the inner cavity of the dust isolation chamber 9.

[0066] The flake alkali crushing treatment production line also includes a second electrical cabinet, and the crusher 7, the conveying belt 8, and the gas pump 92 are respectively connected to the electrical cabinet through wires and signal lines; the second electrical cabinet is connected to an external power supply and an external computer through wires and signal lines, and the computer controls the start-stop and other working states of the crusher 7, the conveying belt 8, and the gas pump 92 in the present application through the electrical cabinet.

[0067] Referring to Figure 14 The dust isolation chamber 9, the reaction tank 82, and the bag dust removal module are all supported by a support frame 93 and fixed by bolts. The support frame 93 is a conventional existing technology in the industry, and will not be described in detail. The first electrical cabinet and the second electrical cabinet are respectively fixed and installed on the support frame 93 by bolts.

[0068] The dust removal method of the flake alkali crushing treatment production line, that is, the method for removing dust from the flake alkali crushing treatment production line, includes an alkali powder particle extraction method and an alkali powder particle recovery method.

[0069] The alkali powder particle extraction method includes the following steps: A1, start the air pump 92, and then open the cover plate 91, so that the external air flows into the dust chamber 9 through the cover plate 91; in the process, the air pump 92 can extract the gas-powder mixture in the dust chamber 9 and press it into the cloth bag dust removal module; the alkali powder particles in the gas-powder mixture are blocked by the cloth bag filter core 4 and fall to the bottom of the first cavity 11, and the gas in the gas-powder mixture passes through the cloth bag filter core 4 and is discharged through the air outlet pipe 16. In the process, the liquid level in the reaction tank 82 needs to be observed (for example, using an electronic liquid level meter inserted in the reaction tank 82), and when the liquid level in the reaction tank 82 is higher than the warning value, the air pump 92 is closed.

[0070] A2, close the air pump 92 and the cover plate 91.

[0071] The alkali powder particle recovery method comprises the following steps: S1, close the air pump 92; then open the third valve body 152 and the vibration motor, so that the alkali powder particles accumulated at the bottom of the first cavity 11 fall into the storage tank 151.

[0072] S2, close the third valve body 152.

[0073] S3, start the first motor 18 to rotate the second cylinder 3 and the cloth bag filter core 4, so that the dust removal ring 5 moves and brushes off the alkali powder particles adhering to the surface of the cloth bag filter core 4 (at this time, the third valve body 152 is in the closed state, which can avoid the problem that the air flow generated by the rotation of the cloth bag filter core 4 blows away the alkali powder particles that have been deposited).

[0074] S4, stop the first motor 18 to stop rotating the second cylinder 3 and the cloth bag filter core 4.

[0075] S5, open the third valve body 152, so that the alkali powder particles fall into the storage tank 151.

[0076] S6, close the third valve body 152 and the vibration motor.

[0077] Step S3 further comprises the following steps: S31, the first motor 18 drives the second cylinder 3 to rotate at high speed, so that the dust removal ring 5 slides from the middle part to the bottom end of the cloth bag filter core 4 under the action of centrifugal force.

[0078] S32, the first motor 18 drives the second cylinder 3 to rotate at low speed, so that the dust removal ring 5 slides from the bottom end to the middle part of the cloth bag filter core 4 under the action of the pulling force of the tension spring 6.

[0079] S33, repeat steps S31-S32 several times (usually 5-15 times), and rotate the second cylinder 3 clockwise in odd-numbered times and counterclockwise in even-numbered times, so that the dust removal ring 5 swings while reciprocating along the axial direction of the cloth bag filter core 4.

[0080] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0081] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In summary, for those skilled in the art, according to the guidance of the present application, the changes, modifications, replacements, deformations made to the present application without departing from the principles and spirits of the present application still fall within the protection scope of the present application.

Claims

1. A baghouse module, characterized by: The utility model provides a dust removal device, including shell (1), first cavity (11) and second cavity (12) that are equipped with in shell (1) and set up second cavity (12) below first cavity (11), the side wall of shell (1) is equipped with air inlet pipe (14), dust outlet pipe (15) and air outlet pipe (16), air inlet pipe (14) is communicated with the position of second cavity (12) lower outer edge, dust outlet pipe (15) is communicated with second cavity (12) bottom end, air outlet pipe (16) is communicated with first cavity (11), The junction position of first cavity (11) and second cavity (12) is equipped with baffle (13), First cavity (11) is equipped with first cylinder (2), and the side wall of first cylinder (2) is equipped with ventilation hole (21) for communicating first cavity (11), second cavity (12) is equipped with second cylinder (3) that is connected with first cylinder (2) and communicates, and the outer side wall position of second cylinder (3) is connected with cloth bag filter element (4), Cloth bag filter element (4) is equipped with dust removal ring (5) and tension spring (6) outside the periphery, the top end of tension spring (6) is connected with cloth bag filter element (4), and the bottom end is connected with dust removal ring (5), First cylinder (2), second cylinder (3) and cloth bag filter element (4) can rotate synchronously, second cylinder (3) can accelerate rotation, makes dust removal ring (5) slip from the middle part to the bottom end of cloth bag filter element (4) under the action of centrifugal force, second cylinder (3) can decelerate rotation, makes dust removal ring (5) slip from the bottom end to the middle part of cloth bag filter element (4) under the action of the tension of tension spring (6), The side wall of second cylinder (3) is equipped with air-permeable hole (31) for communicating the inner cavity of cloth bag filter element (4).

2. The baghouse module of claim 1, wherein: Dust removal ring (5) includes ring body (51) and brush (52), the brush (52) is arranged along the radial direction of cloth bag filter element (4), one end of the brush (52) is fixedly connected with the inner wall of the ring body (51), and the other end is press-bonded with the outer surface of cloth bag filter element (4), The top end or bottom end of the outer surface of the ring body (51) is provided with a vertically arranged windward plate (53), when the rotation speed of the second cylinder (3) changes or the rotation direction changes, the windward plate (53) swings due to the change of the wind resistance (531) it bears, to drive the brush (52) to swing.

3. The baghouse module of claim 2, wherein: Cloth bag filter element (4) includes top cylinder (41), support column (42), stop seat (43) and cloth bag cylinder (44), top cylinder (41) is fixedly connected with second cylinder (3), support column (42) is arranged between top cylinder (41) and stop seat (43) and is provided with a plurality of regular polygonal arrays, the top and bottom ends of support column (42) are fixedly connected with top cylinder (41) and stop seat (43) respectively, cloth bag cylinder (44) is arranged on the periphery of support column (42), and the top and bottom ends of cloth bag cylinder (44) are fixedly connected with top cylinder (41) and stop seat (43) respectively.

4. The baghouse module of claim 3, wherein: The first cylinder (2) and the second cylinder (3) are vertically arranged; the top plate (17) of the shell (1) is provided with a first motor (18); the top end of the first cylinder (2) is coaxially arranged with and fixedly connected to a first output shaft (181) of the first motor (18).

5. The baghouse module of claim 4, wherein: The bottom end of the dust removal pipe (15) is connected and communicated with a storage tank (151); the bottom end of the storage tank (151) is connected and communicated with a discharge pipe (153); the middle part of the dust removal pipe is provided with a third valve body (152); the end part of the discharge pipe (153) is provided with a fourth valve body (154); the bottom end of the outer side wall of the shell (1) is provided with a vibration motor.

6. The baghouse module of claim 5, wherein: The center of the partition plate (13) is provided with a first mounting hole; the bottom end of the outer side wall of the first cylinder (2) is provided with a first bearing (22); the first bearing (22) is mounted in the first mounting hole; the bottom surface of the top plate (17) is provided with an upper concave hole; the top end of the outer side wall of the first cylinder (2) is provided with a second bearing (23); the second bearing (23) is mounted in the upper concave hole.

7. The baghouse module of claim 6, wherein: The air inlet pipe (14) is located below the cloth bag filter element (4).

8. The baghouse module of claim 7, wherein: The stop seat (43) is in a cylindrical shape; the diameter of the end face of the stop seat (43) is greater than the maximum inner diameter of the ring body (51).

9. A flake alkali disintegration treatment line, characterized by: The cloth bag dust removal module of any one of claims 5-8 further comprises a crusher (7), a conveying belt (8) and a dust isolation chamber (9); the crusher (7) and the conveying belt (8) are arranged in the dust isolation chamber (9); a hopper (81) is inserted into the floor of the dust isolation chamber (9); the top end of the hopper (81) is located below one end of the conveying belt (8); the bottom end of the hopper (81) is communicated with a reaction tank (82); The roof of the dust isolation chamber (9) is provided with a cover plate (91) for feeding flakes into the crusher (7); The outer side wall of the dust isolation chamber (9) is provided with an air pump (92); the air inlet of the air pump (92) is communicated with the inner cavity of the dust isolation chamber (9) through a suction pipe; the air outlet of the air pump (92) is communicated with the air inlet pipe (14).

10. A method of dedusting a flake caustic break-up treatment line, characterized by: The method for dust removal of the flake crushing processing line of claim 9 comprises a flake powder particle extraction method and a flake powder particle recovery method, The extraction method comprises the following steps, A1, start the air pump (92), then open the cover plate (91), so that the external air flows into the inner cavity of the dust isolation chamber (9) through the cover plate (91); in the process, the air pump (92) can extract the gas-powder mixture in the dust isolation chamber (9) and press it into the cloth bag dust removal module; the flake powder particles in the gas-powder mixture are blocked by the cloth bag filter element (4) and fall to the bottom of the first cavity (11); the gas in the gas-powder mixture passes through the cloth bag filter element (4) and is discharged through the air outlet pipe (16); A2, close the air pump (92) and the cover plate (91); The recovery method comprises the following steps, S1, turn off the air pump (92), then turn on the third valve body (152) and the vibration motor, so that the alkali powder particles accumulated at the bottom of the first cavity (11) fall into the storage tank (151); S2, turn off the third valve body (152); S3, rotate the second cylinder (3) and the cloth bag filter core (4), so that the dust removal ring (5) moves and brushes off the alkali powder particles adhered to the surface of the cloth bag filter core (4); S4, stop rotating the second cylinder (3) and the cloth bag filter core (4); S5, turn on the third valve body (152), so that the alkali powder particles fall into the storage tank (151); S6, turn off the third valve body (152) and the vibration motor; Step S3 further comprises the following steps, S31, the first motor (18) drives the second cylinder (3) to accelerate rotation, so that the dust removal ring (5) slides from the middle part to the bottom end of the cloth bag filter core (4) under the action of centrifugal force; S32, the first motor (18) drives the second cylinder (3) to decelerate rotation, so that the dust removal ring (5) slides from the bottom end to the middle part of the cloth bag filter core (4) under the action of the pulling force of the tension spring (6); S33, repeat steps S31-S32 several times, so that the dust removal ring (5) reciprocates along the axial direction of the cloth bag filter core (4).

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