A dust regeneration device for calcium carbonate production and screening

Abstract

The present invention discloses a dust regeneration device for screening of calcium carbonate production, which relates to the technical field of screening, and includes a vibrating screen body, a screen mesh is fixedly connected to the vibrating screen body, a dust guide cylinder is placed on the vibrating screen body, a circumferentially distributed rectangular hole is opened on the upper part of the dust guide cylinder, a cover cylinder is fixedly connected to the dust guide cylinder, a fixed plate is fixedly connected to the dust guide cylinder, a circumferentially distributed through hole is opened on the fixed plate, and a circumferentially distributed airflow fan is fixedly connected to the fixed plate. When the present invention uses an external vacuum cleaner and an airflow fan to collect dust raised by calcium carbonate, the dust bypasses the inner wall of the dust guide cylinder and the rectangular hole on the upper part of the dust guide cylinder in turn, and then is sucked downward by the airflow fan, so as to avoid the air pipe of the vacuum cleaner directly sucking against the screen mesh, so that the suction force is too large, resulting in the non-floating calcium carbonate powder being sucked away, or to avoid the air pipe of the vacuum cleaner being too far away from the screen mesh, so that the suction force is insufficient, resulting in the inability to effectively capture and remove the dust generated during the screening process.

Description

Technical Field

[0001] The invention relates to the technical field of screening, and in particular to a dust regeneration device for screening in calcium carbonate production. Background Art

[0002] Calcium carbonate production screening is a key step in the production process. The main purpose is to classify the crushed calcium carbonate particles by size to ensure uniform product size and meet the needs of different application fields. In the production and screening of calcium carbonate, dust needs to be collected in time to reduce environmental pollution and occupational health risks, avoid the potential threat of dust explosions, maintain the efficient operation of the production line and the good condition of the equipment, and promote the recycling of resources to ensure product quality and meet the standards and requirements of sustainable production. At the same time, calcium carbonate dust contains valuable raw material components. After collection and proper treatment, these dusts can be put back into the production process, which not only reduces the waste of raw materials, but also reduces production costs.

[0003] When the dust for screening in the production of calcium carbonate is regenerated, it is generally collected directly from above by the dust collection pipe. If the suction force is set too high, in addition to the normal floating dust, it may also absorb those heavier particles that are not originally in a floating state, attached to the surface of the equipment or mixed in the material. This will not only increase the difficulty of subsequent dust treatment and separation, but may also lead to the loss of useful materials and reduce resource utilization. If the suction force is insufficient, the dust generated during the screening process cannot be effectively captured and removed, which will cause dust to accumulate in the environment, which will not only affect the cleanliness of the working environment and increase health and safety risks, but may also affect the normal operation of the equipment, such as clogging the screen and reducing screening efficiency.

[0004] Based on the above situation, the present invention proposes a dust regeneration device for calcium carbonate production and screening. Summary of the invention

[0005] In order to overcome the shortcoming that the dust collection condition cannot be reasonably controlled, the present invention provides a dust regeneration device for calcium carbonate production and screening.

[0006] A dust regeneration device for screening calcium carbonate production comprises a vibrating screen body, the vibrating screen body is fixedly connected with a screen, the vibrating screen body is detachably connected to the dust guide cylinder, the upper part of the dust guide cylinder is provided with circumferentially distributed rectangular holes, the dust guide cylinder is fixedly connected with a cover cylinder, the dust guide cylinder is fixedly connected with a fixing plate, the fixing plate is provided with circumferentially distributed through holes, the fixing plate is fixedly connected with a circumferentially distributed airflow fan, the through holes of the fixing plate and the airflow fan are alternately distributed, the dust guide cylinder is fixedly connected with a collecting box, the lower part of the dust guide cylinder is provided with an arc groove, the arc groove of the dust guide cylinder is lowest on a side close to the collecting box, the collecting box is connected with the dust guide cylinder, the collecting box is rotatably connected with a box door symmetrically distributed along the collecting box, the collecting box is fixedly connected with tension sensors symmetrically distributed along the collecting box, a card plate is fixedly connected between the symmetrically distributed tension sensors, a collecting box is placed on the card plate, the collecting box is provided with a plurality of ventilation holes, and the collecting box is connected with a connecting pipe.

[0007] As a preferred technical solution of the present invention, it also includes an electric push rod symmetrically distributed along the dust guide tube, the electric push rod is fixedly connected to the dust guide tube, the electric push rod is fixedly connected to a connecting rod, an outer sleeve is slidably connected between the symmetrically distributed connecting rods, the dust guide tube is fixedly connected to an inner sleeve, the outer sleeve is slidably connected to the inner sleeve, and a first spring is fixedly connected between the connecting rod and the outer sleeve.

[0008] As a preferred technical solution of the present invention, it also includes a blocking frame, which is annularly slidably connected to the dust guide tube, and the blocking frame is used to block the through hole of the fixed plate. The fixed plate is fixed with circumferentially distributed fixing rods, and the fixing rods move to squeeze the blocking frame to slide annularly.

[0009] As a preferred technical solution of the present invention, the retaining frame is provided with circumferentially distributed guide holes, and the fixing rod is limitedly matched with the guide holes adjacent to the retaining frame.

[0010] As a preferred technical solution of the present invention, it also includes a lower pressure frame, which is slidably connected to the collection box, and is used to press down the card plate. The collection box is fixedly connected with an electromagnet, and the lower pressure frame is fixedly connected with a magnetic block. The magnetic block cooperates with the electromagnet through magnetic force, and a second spring symmetrically distributed along the lower pressure frame is fixedly connected between the lower pressure frame and the collection box.

[0011] As a preferred technical solution of the present invention, when the magnetic block contacts the electromagnet, the magnetic force of the electromagnet is greater than the elastic force of the second spring.

[0012] As a preferred technical solution of the present invention, it also includes an N-type pressing plate fixedly connected to the box door, and the N-type pressing plate is extrusion-matched with the lower pressing frame.

[0013] As a preferred technical solution of the present invention, it also includes a slide, which is slidably connected to the cover tube, the top of the connecting rod is in contact with the slide, the collection box is horizontally slidably connected to a first baffle, and the slide is limitedly matched with the first baffle through an inclined groove.

[0014] As a preferred technical solution of the present invention, it also includes a second baffle, which is slidably connected to the collection box and contacts the inner wall of the collection box.

[0015] As a preferred technical solution of the present invention, it also includes a third spring symmetrically distributed along the second baffle plate, and two ends of the third spring are respectively fixedly connected to the second baffle plate and the collection box.

[0016] The beneficial effect is that when the present invention uses an external vacuum cleaner and an air flow fan to collect dust raised by calcium carbonate, the dust bypasses the inner wall of the dust guide cylinder and the rectangular hole on the upper part of the dust guide cylinder in turn, and is then sucked downward by the air flow fan, thereby preventing the air pipe of the vacuum cleaner from directly sucking against the screen, resulting in excessive suction force, causing non-floating calcium carbonate powder to be sucked away, or preventing the air pipe of the vacuum cleaner from being too far away from the screen, resulting in insufficient suction force, resulting in the inability to effectively capture and remove the dust generated during the screening process.

[0017] When the initial dust amount is the largest, the rectangular hole on the upper part of the dust guide tube is fully opened, which is conducive to the rapid absorption of a large amount of raised dust. As the dust is gradually absorbed into the collection box, the dust overflowing through the rectangular hole on the upper part of the dust guide tube gradually decreases. At this time, the outer sleeve gradually blocks the rectangular hole on the upper part of the dust guide tube, so that the airflow fan mainly concentrates on absorbing the dust in the arc groove of the dust guide tube, avoiding sucking away the non-floating calcium carbonate powder inside the dust guide tube.

[0018] When the amount of dust is large in the early stage, the through holes are opened to a greater extent, increasing the air flow through the airflow fan, thereby more effectively inhaling a large amount of dust particles and avoiding clogging or reduced efficiency of the airflow fan due to excessive dust concentration in a short period of time. In the later period when there is less dust, the through holes are closed to reduce unnecessary air circulation and reduce the operating power of the airflow fan.

[0019] When there is too much floating dust, the collection box cannot be collected all at once. Therefore, when the collection box is full and needs to be cleared midway, the lower pressure frame is maintained in the state of the lower pressure plate, so that the lower pressure frame replaces the collection box lower pressure plate, so that replacing the collection box midway will not affect the early closing control of the rectangular hole of the outer sleeve, and avoid the rectangular hole on the upper part of the dust guide tube returning to the initial fully open state.

[0020] When the collection box is full of dust, the slide is pushed upward by the connecting rod, and the slide drives the first baffle to slide backward through the inclined groove, so that the first baffle automatically closes the collection box to prevent excessive dust from being sucked in and causing dust to overflow outside the collection box.

[0021] By setting the second baffle and the third spring, the collection box is automatically opened when placed in the collection box and automatically closed when taken out, thereby preventing the dust in the collection box from being accidentally scattered when taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the components such as the vibrating screen body, the screen and the dust guide cylinder of the present invention.

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the collection box, tension sensor, and card board of the present invention.

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the outer sleeve, inner sleeve, first spring and other components of the present invention.

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the airflow fan, the baffle frame and the fixing rod and other components of the present invention.

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the electromagnet, the magnetic block, the second spring and other components of the present invention.

[0028] Figure 7 It is a three-dimensional structural schematic diagram of the collecting box, the slide frame and the outer sleeve and other components of the present invention.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the collecting box, the sliding frame and the first baffle of the present invention.

[0030] Fig. 9 It is a three-dimensional structural schematic diagram of the collecting box, the second baffle plate, the third spring and other components of the present invention.

[0031] The names and serial numbers of the parts in the figure are: 1_vibrating screen body, 2_screen, 3_dust guide cylinder, 4_cover cylinder, 5_fixing plate, 6_air flow fan, 7_collection box, 701_box door, 8_tension sensor, 9_card, 10_collection box, 11_connecting pipe, 12_electric push rod, 13_connecting rod, 14_outer sleeve, 15_inner sleeve, 16_first spring, 17_blocking frame, 18_fixing rod, 19_lower pressure frame, 20_electromagnet, 21_magnetic block, 22_second spring, 23_N-type pressure plate, 24_slide, 25_first baffle, 26_second baffle, 27_third spring. DETAILED DESCRIPTION

[0032] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0033] Example 1: A dust regeneration device for calcium carbonate production and screening, such as Figure 1-Figure 3 As shown, it includes a vibrating screen body 1, a screen 2 is fixedly connected to the inner side of the upper part of the vibrating screen body 1, a dust guide cylinder 3 is placed on the upper part of the vibrating screen body 1, and the upper part of the dust guide cylinder 3 is provided with circumferentially distributed rectangular holes, a cover cylinder 4 is fixedly connected to the dust guide cylinder 3, a fixing plate 5 is fixedly connected to the dust guide cylinder 3, the fixing plate 5 is located in the cover cylinder 4, the fixing plate 5 is set in a circular ring shape, the fixing plate 5 is provided with at least three circumferentially distributed through holes, the fixing plate 5 is fixedly connected to at least three circumferentially distributed airflow fans 6, the through holes of the fixing plate 5 and the airflow fans 6 are alternately spaced, and a collecting box 7 is fixedly connected to the front side of the dust guide cylinder 3. An arc groove is provided at the lower part of the dust guide cylinder 3, and the arc groove of the dust guide cylinder 3 is low in the front and high in the back. The collecting box 7 is connected to the dust guide cylinder 3, and the collecting box 7 is rotatably connected to a box door 701 symmetrically distributed along the collecting box 7. Tension sensors 8 symmetrically distributed along the left and right of the collecting box 7 are fixedly connected inside the collecting box 7, and a clamping plate 9 is fixed between the symmetrically distributed tension sensors 8. A collecting box 10 is placed on the clamping plate 9. The collecting box 10 is used to collect raised calcium carbonate dust. The collecting box 10 is provided with a plurality of ventilation holes. The bottom of the collecting box 7 is connected with a connecting pipe 11, which can be connected to an external vacuum cleaner.

[0034] First, the calcium carbonate to be screened and regenerated is poured onto the screen 2 through the top of the cover tube 4, and the vibrating screen body 1 is started to screen the calcium carbonate first. The screened calcium carbonate is then cleaned, purified, and other treatments to make its performance close to or reach the level of new products, thus completing the screening and regeneration operation of the carbonate cover.

[0035] In the above process, the connecting pipe 11 is connected to an external vacuum cleaner, and the airflow fan 6 is started. The calcium carbonate dust is lifted upward along the inner wall of the dust guide cylinder 3. The airflow fan 6 absorbs the floating dust through suction, so that the floating dust overflows through the rectangular holes distributed circumferentially on the upper part of the dust guide cylinder 3, and slides downward along the outer wall of the dust guide cylinder 3 into the arc groove of the dust guide cylinder 3. Since the rear side of the arc groove of the dust guide cylinder 3 is higher than the front side, the dust slides forward along the arc groove of the dust guide cylinder 3 into the collection box 10 in the collection box 7. Under the auxiliary suction of the external vacuum cleaner, the dust is sucked into the collection box 10 more quickly. After the adsorption and collection of the dust is completed, the vibrating screen body 1 is closed and the air filter 1 is opened. The box door 701, pull the collecting box 10 forward along the card plate 9 to take away the collected dust, and then remove the cover tube 4, so that the dust guide tube 3, fixed plate 5, airflow fan 6, collecting box 7, box door 701, tension sensor 8, card plate 9, collecting box 10 and connecting pipe 11 are removed as a whole along with the cover tube 4, and the screen 2 can be cleaned. After the collecting box 10 and the screen 2 are cleaned, put the collecting box 10 back to its original position and cover the cover tube 4, so that the dust guide tube 3, fixed plate 5, airflow fan 6, collecting box 7, box door 701, tension sensor 8, card plate 9, collecting box 10 and connecting pipe 11 are installed on the vibrating screen body 1 as a whole along with the cover tube 4.

[0036] In summary, when the present invention uses an external vacuum cleaner and an airflow fan 6 to collect dust raised by calcium carbonate, the dust bypasses the inner wall of the dust guide tube 3 and the rectangular hole on the upper part of the dust guide tube 3 in turn, and is then sucked downward by the airflow fan 6, thereby preventing the air pipe of the vacuum cleaner from directly sucking against the screen 2, resulting in excessive suction force, causing the non-floating calcium carbonate powder to be sucked away, or preventing the air pipe of the vacuum cleaner from being too far away from the screen 2, resulting in insufficient suction force, resulting in the inability to effectively capture and remove the dust generated during the screening process.

[0037] like Figure 4 As shown, it also includes an electric push rod 12 which is symmetrically distributed along the dust guide cylinder 3. The electric push rod 12 is fixedly connected to the dust guide cylinder 3. A connecting rod 13 is fixedly connected to the end of the electric push rod 12. An outer sleeve 14 is slidably connected between the connecting rods 13 which are symmetrically distributed along the up and down directions. An inner sleeve 15 is fixedly connected to the upper part of the dust guide cylinder 3. The outer sleeves 14 are slidably connected to the inner sleeves 15. A first spring 16 is fixedly connected between the connecting rod 13 and the outer sleeve 14.

[0038] In the above process, before starting the vibrating screen body 1, the outer sleeve 14 blocks the circumferentially distributed rectangular holes on the upper part of the dust guide cylinder 3 to prevent a large amount of powder from overflowing through the rectangular holes on the upper part of the dust guide cylinder 3 during the process of pouring calcium carbonate into the screen 2. When starting the vibrating screen body 1, the electric push rod 12 is started synchronously, and the electric push rod 12 contracts to drive the connecting rod 13 to move downward, thereby driving the outer sleeve 14 to slide downward along the inner sleeve 15, so that the rectangular holes on the upper part of the dust guide cylinder 3 are completely opened.

[0039] As the dust in the collection box 10 gradually increases, the collection box 10 presses down the card plate 9 through the gradually increasing gravity, and the downward pulling force of the card plate 9 on the tension sensor 8 gradually increases. The tension sensor 8 controls the electric push rod 12 to gradually extend upward through the control module, driving the connecting rod 13 to move upward, thereby driving the outer sleeve 14 to slide upward along the inner sleeve 15, so that the rectangular hole on the upper part of the dust guide tube 3 is gradually closed.

[0040] In this way, when the initial dust amount is the largest, the rectangular hole on the upper part of the dust guide cylinder 3 is completely opened, which is conducive to the rapid absorption of a large amount of raised dust. As the dust is gradually absorbed into the collection box 10, the dust overflowing through the rectangular hole on the upper part of the dust guide cylinder 3 gradually decreases. At this time, the outer sleeve 14 gradually blocks the rectangular hole on the upper part of the dust guide cylinder 3, so that the airflow fan 6 mainly concentrates on the dust in the arc groove of the dust guide cylinder 3 to avoid sucking away the non-floating calcium carbonate powder inside the dust guide cylinder 3.

[0041] Embodiment 2: Based on embodiment 1, Figure 2 and Figure 5 As shown, it also includes a baffle 17, which is annularly slidably connected to the dust guide tube 3, and the baffle 17 is used to block the through hole of the fixed plate 5. The outer side of the outer sleeve 14 is fixedly connected with circumferentially distributed fixing rods 18, and the baffle 17 has circumferentially distributed guide holes. The fixing rods 18 are limitedly matched with the guide holes adjacent to the baffle 17. The fixing rods 18 move downward through the guide holes to drive the baffle 17 to slide annularly, so as to open the rectangular hole on the upper part of the dust guide tube 3.

[0042] When the outer sleeve 14 completely blocks the circumferentially distributed rectangular holes on the upper part of the dust guide cylinder 3, the blocking frame 17 also completely blocks the through hole of the fixed plate 5. When the outer sleeve 14 slides downward, the outer sleeve 14 drives the fixed rod 18 to move downward together, and the fixed rod 18 drives the blocking frame 17 to slide in a circle along the fixed plate 5 through the guide hole, so that when the outer sleeve 14 gradually opens the rectangular hole on the upper part of the dust guide cylinder 3, the blocking frame 17 also gradually opens the through hole of the fixed plate 5.

[0043] When the outer sleeve 14 gradually slides upward, the outer sleeve 14 drives the fixing rod 18 to move upward together, and the fixing rod 18 drives the retaining frame 17 to slide in the opposite direction along the fixing plate 5 through the guide hole, so that when the outer sleeve 14 gradually closes the rectangular hole on the upper part of the dust guide cylinder 3, the retaining frame 17 also gradually closes the through hole of the fixing plate 5.

[0044] In this way, when the amount of dust is large in the early stage, the through holes are opened to a greater extent, increasing the air flow through the air flow fan 6, thereby more effectively inhaling a large amount of dust particles, avoiding the air flow fan 6 from being blocked or the efficiency being reduced due to excessive dust concentration in a short period of time. In the later period when there is less dust, the through holes are closed to reduce unnecessary air circulation and reduce the operating power of the air flow fan 6.

[0045] like Figure 6 As shown, it also includes a lower pressure frame 19, which is slidably connected to the collection box 7. The lower pressure frame 19 is used to press down the card plate 9. An electromagnet 20 is fixedly connected to the side of the collection box 7 close to the lower pressure frame 19, and a magnetic block 21 is fixedly connected to the middle of the lower pressure frame 19. When power is turned on, the magnetic block 21 cooperates with the electromagnet 20 through magnetic force. A second spring 22 is fixedly connected between the lower pressure frame 19 and the collection box 7 and is symmetrically distributed along the left and right sides of the lower pressure frame 19. When the magnetic block 21 contacts the electromagnet 20, the magnetic force of the electromagnet 20 is greater than the elastic force of the second spring 22. An N-type pressure plate 23 is fixedly connected to the top of the box door 701, and the N-type pressure plate 23 is squeezed and matched with the lower pressure frame 19.

[0046] When there is too much floating dust, the collection box 10 cannot be collected all at once. Therefore, when the collection box 10 is full, the collection box 10 needs to be replaced midway, and the remaining dust is collected again by the empty collection box 10. If the collection box 10 is directly taken away, the downward pulling force of the tension sensor 8 gradually returns to the initial value, which will cause the electric push rod 12 to shrink to the initial position, so that the rectangular hole on the upper part of the dust guide cylinder 3 returns to the initial fully opened state. To avoid this phenomenon, the specific operation is as follows:

[0047] Initially, the magnetic block 21 is far away from the electromagnet 20, and the magnetic attraction force is smaller than the elastic force of the second spring 22. When the box door 701 is opened, the box door 701 rotates and drives the N-type pressure plate 23 to rotate synchronously. During the rotation, the N-type pressure plate 23 squeezes the lower pressure frame 19 to slide downward until it contacts the card plate 9. The second spring 22 is compressed, and the lower pressure frame 19 drives the magnetic block 21 to move downward until it contacts the electromagnet 20. At this time, the magnetic attraction force is greater than the elastic force of the second spring 22. The electromagnet 20 magnetically attracts the magnetic block 21, so that the lower pressure frame 19 maintains the state of pressing the card plate 9, so that the lower pressure frame 19 replaces the collection box 10 to press the card plate 9, so that replacing the collection box 10 in the middle will not affect the early closing regulation of the rectangular hole by the outer sleeve 14. When the vibrating screen body 1 is closed, the electromagnet 20 is also powered off, and the second spring 22 drives the lower pressure frame 19 to slide upward and reset.

[0048] Embodiment 3: Based on embodiment 2, Figure 7-Figure 8 As shown, it also includes a slide 24, which is slidably connected to the cover tube 4, and the top of the connecting rod 13 contacts the slide 24. The upper part of the collection box 7 is slidably connected to the first baffle 25 along the front-to-back direction. The first baffle 25 is used to cover the collection box 7, and the slide 24 is limitedly matched with the first baffle 25 through an inclined groove.

[0049] When the outer sleeve 14 slides upward to the limit along the inner sleeve 15, the top of the connecting rod 13 contacts the slide 24, and the electric push rod 12 will continue to extend, thereby driving the connecting rod 13 to slide upward relative to the outer sleeve 14, the first spring 16 is compressed, and the connecting rod 13 pushes the slide 24 to slide upward, and the slide 24 drives the first baffle 25 to slide backward through the inclined groove, so that when the collection box 10 is full of dust, the first baffle 25 automatically closes the collection box 7. When it is found that the collection box 7 is closed, the airflow fan 6 is manually closed to prevent excessive dust from being inhaled, causing dust to overflow outside the collection box 7. When the electric push rod 12 contracts and drives the connecting rod 13 to move downward, the first spring 16 gradually resets, and the slide 24 slides downward under the action of gravity, and drives the first baffle 25 to slide forward through the inclined groove, so that the collection box 7 is automatically opened.

[0050] like Fig. 9 As shown, it also includes a second baffle 26, which is slidably connected to the collection box 10, and is used to cover the collection box 10. The second baffle 26 contacts the inner wall of the collection box 7, and a third spring 27 is fixed between the second baffle 26 and the collection box 10 and is symmetrically distributed along the second baffle 26.

[0051] When the collection box 10 is placed into the collection box 7, the second baffle 26 touches the inner wall of the rear side of the collection box 7, causing the second baffle 26 to slide forward and the third spring 27 to be compressed. In this way, the collection box 10 is automatically opened when placed into the collection box 7, and when the collection box 10 is taken out, the second baffle 26 is automatically returned to its original position by the action of the third spring 27, causing the collection box 10 to automatically close when taken out.

[0052] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A dust regeneration device for calcium carbonate production screening, comprising a vibrating screen body (1), wherein the vibrating screen body (1) is fixedly connected with a screen (2), wherein: The vibrating screen body (1) further comprises a dust guide cylinder (3), wherein the dust guide cylinder (3) is detachably connected to the vibrating screen body (1), wherein the upper portion of the dust guide cylinder (3) is provided with circumferentially distributed rectangular holes, wherein the dust guide cylinder (3) is fixedly connected to a cover cylinder (4), wherein the dust guide cylinder (3) is fixedly connected to a fixing plate (5), wherein the fixing plate (5) is provided with circumferentially distributed through holes, wherein the fixing plate (5) is fixedly connected to a circumferentially distributed air flow fan (6), wherein the through holes of the fixing plate (5) and the air flow fan (6) are alternately arranged, wherein the dust guide cylinder (3) is fixedly connected to a collecting box (7), wherein the lower portion of the dust guide cylinder (3) is provided with an arc groove, wherein the arc groove of the dust guide cylinder (3) is the lowest on a side close to the collecting box (7), wherein the collecting box (7) is connected to the dust guide cylinder (3), wherein the collecting box (7) is rotatably connected to a box door (701) symmetrically arranged along the collecting box (7), wherein the collecting box (7) is provided with a plurality of doors (701) symmetrically arranged along the collecting box (7), wherein the collecting box (7) is provided with a plurality of doors (701) symmetrically arranged along the collecting box (7), wherein the plurality of doors (701) are rotatably connected to the collecting box (7), wherein the plurality of doors (701) are symmetrically arranged along ... 7) is fixedly connected with tension sensors (8) symmetrically distributed along the collection box (7), a card plate (9) is fixedly connected between the symmetrically distributed tension sensors (8), a collection box (10) is placed on the card plate (9), the collection box (10) is provided with a plurality of ventilation holes, and the collection box (7) is connected with a connecting pipe (11); it also includes electric push rods (12) symmetrically distributed along the dust guide cylinder (3), the electric push rods (12) are fixedly connected to the dust guide cylinder (3), the electric push rods (12) are fixedly connected to a connecting rod (13), an outer sleeve (14) is slidably connected between the symmetrically distributed connecting rods (13), the dust guide cylinder (3) is fixedly connected to an inner sleeve (15), the outer sleeve (14) is slidably connected to the inner sleeve (15), and a first spring (16) is fixedly connected between the connecting rod (13) and the outer sleeve (14); It also includes a blocking frame (17), the blocking frame (17) being connected to the dust guide cylinder (3) in an annular sliding manner, the blocking frame (17) being used to block the through hole of the fixing plate (5), the outer sleeve (14) being fixedly connected to circumferentially distributed fixing rods (18), the fixing rods (18) moving to squeeze the blocking frame (17) to slide in an annular manner; The retaining frame (17) is provided with guide holes distributed in a circumferential direction, and the fixing rod (18) is limitedly matched with the guide holes adjacent to the retaining frame (17); The invention also comprises a slide (24), the slide (24) being slidably connected to the cover tube (4), the top end of the connecting rod (13) being in contact with the slide (24), the collecting box (7) being horizontally slidably connected to a first baffle (25), and the slide (24) being limitedly matched with the first baffle (25) via an inclined groove.

2. A dust regeneration device for calcium carbonate production and screening as claimed in claim 1, characterized in that: The invention also comprises a lower pressing frame (19), wherein the lower pressing frame (19) is slidably connected to the collecting box (7), and the lower pressing frame (19) is used to press down the clamping plate (9). The collecting box (7) is fixedly connected to an electromagnet (20), and the lower pressing frame (19) is fixedly connected to a magnetic block (21). The magnetic block (21) cooperates with the electromagnet (20) through magnetic force. A second spring (22) symmetrically distributed along the lower pressing frame (19) is fixedly connected between the lower pressing frame (19) and the collecting box (7).

3. A dust regeneration device for calcium carbonate production and screening as claimed in claim 2, characterized in that: When the magnetic block (21) contacts the electromagnet (20), the magnetic force of the electromagnet (20) is greater than the elastic force of the second spring (22).

4. A dust regeneration device for calcium carbonate production and screening as claimed in claim 3, characterized in that: It also includes an N-shaped pressing plate (23) fixedly connected to the box door (701), and the N-shaped pressing plate (23) is pressed and matched with the lower pressing frame (19).

5. A dust regeneration device for calcium carbonate production and screening as claimed in claim 4, characterized in that: It also includes a second baffle (26), the second baffle (26) being slidably connected to the collection box (10), and the second baffle (26) being in contact with the inner wall of the collection box (7).

6. A dust regeneration device for calcium carbonate production and screening as claimed in claim 5, characterized in that: It also includes a third spring (27) symmetrically distributed along the second baffle plate (26), with two ends of the third spring (27) respectively fixed to the second baffle plate (26) and the collection box (10).

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