A dust suppression device for chemical production safety

Abstract

The present invention relates to the technical field of chemical separation equipment, and in particular to a dust suppression device for chemical production safety. The technical problem is that in the process of dust suppression, the cleaning of the filter box of the current dust suppression device is not convenient and fast enough, and the dust suppression is not sufficient, which leads to poor dust suppression effect. A dust suppression device for chemical production safety includes a collection bin, a side cover plate is clamped on the collection bin, a conical cylinder is fixedly connected to the collection bin, and the bottom of the conical cylinder is connected to the top of the collection bin. The driving motor drives the fan blades to rotate so that the dust is sucked into the inner cylinder and the conical cylinder, and the water pump draws water into the circulation pipe and the guide pipe through the spray head to spray the inside of the inner cylinder. The dust absorbs the water mist and increases its weight. The rotating fan blades cannot pull the increased dust, and then the dust falls into the collection bin due to gravity. A small part of the dust that has not absorbed the water mist will continue to move upward and adhere to the surface of the filter box, and then the dust is filtered for the second time, so that the dust reduction effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of chemical separation equipment, and in particular to a dust suppression device for safe production of chemical industry. Background Art

[0002] Dust is easily generated during chemical production, posing certain safety hazards. Dust reduction work is usually required during chemical production. During dust reduction, workers often inhale the dust into a container and then use a spray to reduce the dust. Then, a filter box is used to further filter the air to achieve the purpose of effective dust reduction.

[0003] The current dust reduction device is not convenient for alternately cleaning the filter box during the dust reduction process, which results in the cleaning of the filter box not being convenient and fast enough, resulting in low dust reduction efficiency. In addition, the existing dust reduction device is not convenient for attaching water mist to objects to further absorb dust, which results in insufficient dust reduction, resulting in poor dust reduction effect. Summary of the invention

[0004] In order to overcome the above shortcomings, the present invention provides a dust reduction device for chemical production safety, which can alternately clean the filter box while reducing dust, making dust reduction more convenient and quick, and can attach water mist to objects to further absorb dust, making dust reduction more sufficient, thereby enhancing the dust reduction effect.

[0005] The technical solution is: a dust suppression device for chemical production safety, comprising a collection bin, a discharge port is opened on one side of the collection bin, a side cover is clamped on the discharge port of the collection bin, a conical cylinder is fixedly connected to the collection bin, the bottom of the conical cylinder is communicated with the top of the collection bin, an air inlet is opened on one side of the conical cylinder, an air outlet is opened on the top of the conical cylinder, an inner cylinder is fixedly connected in the conical cylinder, a filter box is fixedly connected to the air outlet of the conical cylinder, two square holes are symmetrically opened on the filter box, a drive motor is fixedly connected to the conical cylinder, a fan blade is rotatably connected to the air outlet of the conical cylinder, the fan blade is located above the filter box, a belt drive assembly is connected between the top of the fan blade and the output shaft of the drive motor, a spray mechanism for spraying air is provided on the conical cylinder, a closing mechanism for alternately blocking the filter box is also provided on the conical cylinder, and a cleaning mechanism for cleaning the filter box is provided on the conical cylinder.

[0006] Furthermore, the spray mechanism includes a circulation pipe, which is fixedly connected to the conical tube, a water pump is fixedly connected to the circulation pipe, guide pipes are fixedly connected to the bottoms of both sides of the circulation pipe, the bottoms of the two guide pipes are respectively connected to the two sides of the inner tube, the two guide pipes are connected to the circulation pipe, the bottoms of the two guide pipes are fixedly connected to spray heads, and the two spray heads are located inside the inner tube.

[0007] The two rotatable plates are connected to the bottom of the filter box, and the two rotatable plates are connected to the bottom of the filter box in a rotatable manner.

[0008] Furthermore, the cleaning mechanism includes an absorption pump, and the two absorption pumps are respectively fixedly connected to the two sides of the top of the conical cylinder, and the two absorption pumps are fixedly connected with connecting pipes, and the bottoms of the two connecting pipes are respectively connected to the two sides of the inner cylinder, and the two sides of the filter box are fixedly connected with extension pipes, and the two extension pipes are respectively connected to the two sides of the filter box, and the two extension pipes pass through the two sides of the air outlet of the conical cylinder respectively, and the ends of the two extension pipes away from each other are fixedly connected with pressure valves.

[0009] The filter screen of claim 1, wherein the filter screen is provided at the bottom of the filter screen and the filter screen is provided with a plurality of filter elements, the filter screen being provided with a plurality of filter elements having a plurality of filter elements and a plurality of filter elements having a plurality of filter elements.

[0010] Furthermore, the bottom of the rotating filter is located below the spray head.

[0011] Furthermore, a guide cone is included, which is fixedly connected to the inner wall of the material collecting bin and is located below the connection between the material collecting bin and the conical cylinder.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The driving motor drives the fan blades to rotate at high speed through the belt transmission assembly so that the inner cylinder and the conical cylinder suck in the external dust, and then the dust enters the inner cylinder through the bottom of the inner cylinder. At the same time, the water pump will pump water into the circulation pipe and the guide pipe and then spray it evenly on the inside of the inner cylinder through the spray head. The sucked dust will absorb the sprayed water mist and increase its weight. The rotating fan blades cannot pull the increased dust, and the dust falls into the aggregate bin due to gravity. A small part of the dust that has not absorbed the water mist will continue to move upward and adhere to the surface of the filter box, thereby performing secondary filtration on the dust, thereby achieving a better dust reduction effect.

[0013] 2. When the filter box needs to be cleaned, the telescopic rod of one of the electric push rods is extended to drive the push frame to squeeze the two rotating disks and the two rotating plates to rotate together. The rotation of the rotating plate will block the square hole of the filter box. While the push frame moves, it will also squeeze the rotating disk to rotate so that the sealing plate contacts the inner wall of the inner cylinder to form an independent space, so that the dust is filtered through the other side of the filter box. Then one of the absorption pumps draws the air between the sealing plate and the inner cylinder through the connecting pipe to form a negative pressure. The pressure valve opens instantly at a certain pressure so that the external air instantly enters the interior of the filter box through the extension pipe due to the pressure difference. Then the inhaled air will be blown from the inside of one side of the filter box to the outside, so that the dust attached to the outside of the filter box is blown off, and the blown dust will enter the absorption pump through the connecting pipe. Then the telescopic rod of the electric push rod is shortened to drive the push frame to reset. The reset of the push frame drives the rotating plate and the sealing plate to reset together through the rotating disk and the rotating disk. Then the staff starts another electric push rod to clean the other side of the filter box. In this way, the filter box can be cleaned alternately while dust reduction is being performed, making the cleaning faster and more convenient, thereby improving the dust reduction efficiency.

[0014] 3. While spraying, the water mist sprayed from the spray head will adhere to the rotating filter screen, and the rotating filter screen with water mist attached will further absorb dust. The rotation and reset of one of the sealing plates will cause the lower pressure ring to reciprocate up and down through the reset spring. The up and down reciprocating movement of the lower pressure ring will drive the guide screw to reciprocate. The reciprocating rotation of the guide screw will cause the rotating filter screen to intermittently rotate in the same direction through the overrunning clutch, thereby causing the support plate and the upper cover plate to intermittently scrape off the dust attached to the rotating filter screen, thereby causing the rotating filter screen to further absorb dust, thereby making the dust reduction more sufficient, thereby enhancing the dust reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0018] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the sealing mechanism of the present invention.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the sealing mechanism and the filter box of the present invention.

[0021] Figure 7 It is a partial three-dimensional structural schematic diagram of the closing mechanism of the present invention.

[0022] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the sealing mechanism, the adsorption mechanism and the connecting pipe of the present invention.

[0023] Fig. 9 It is a schematic diagram of the cross-sectional three-dimensional structure of the connecting tube and the straw of the present invention.

[0024] Fig.10 It is a schematic diagram of the cross-sectional three-dimensional structure of the inner cylinder, the partition frame and the rotating filter screen of the present invention.

[0025] Fig.11 It is a partial three-dimensional structural schematic diagram of the adsorption mechanism of the present invention.

[0026] Fig.12 It is a schematic diagram of a partially disassembled three-dimensional structure of the adsorption mechanism of the present invention.

[0027] Figure numbers: 1. Aggregate bin, 111. Side cover, 2. Conical cylinder, 21. Inner cylinder, 23. Filter box, 3. Driving motor, 4. Fan blades, 5. Belt drive assembly, 61. Circulation pipe, 62. Water pump, 63. Guide pipe, 64. Spray head, 71. Electric push rod, 72. Partition frame, 73. Rotating plate, 74. Sealing plate, 75. Push frame, 76. Rotating disk, 77. Rotating disk, 81. Connecting pipe, 82. Absorption pump, 83. Extension pipe, 84. Pressure valve, 91. Rotating filter, 92. Support plate, 93. Upper cover, 94. Suction pipe, 96. Overrunning clutch, 97. Guide screw, 98. Lower pressure ring, 99. Reset spring, 12. Guide cone. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1: A dust suppression device for chemical production safety, such as Figure 1-Figure 12 As shown, it includes a collection bin 1, a discharge port is opened on one side of the collection bin 1, the discharge port of the collection bin 1 is used to take out the absorbed dust, a side cover plate 111 is clamped on the discharge port of the collection bin 1, a conical cylinder 2 is welded on the collection bin 1, the bottom of the conical cylinder 2 is connected to the top of the collection bin 1, an air inlet is opened on one side of the conical cylinder 2, the air inlet of the conical cylinder 2 is used to inhale air and dust, an air outlet is opened on the top of the conical cylinder 2, an inner cylinder 21 is welded inside the conical cylinder 2, a filter box 23 is connected to the air outlet of the conical cylinder 2 by bolts, and the filter box There are two square holes symmetrically opened on 23, the driving motor 3 is connected to the conical cylinder 2 by bolts, the fan blade 4 is rotatably connected to the air outlet of the conical cylinder 2, the fan blade 4 is located above the filter box 23, the fan blade 4 is used to pump air and dust, and a belt drive assembly 5 is connected between the top of the fan blade 4 and the output shaft of the driving motor 3, the conical cylinder 2 is provided with a spray mechanism for spraying air, the conical cylinder 2 is also provided with a closing mechanism for alternately blocking the filter box 23, and the conical cylinder 2 is provided with a cleaning mechanism for cleaning the filter box 23.

[0030] The spray mechanism includes a circulation pipe 61, which is connected to the conical tube 2 by bolts. A water pump 62 is connected to the circulation pipe 61 by bolts. Guide pipes 63 are welded to the bottoms of both sides of the circulation pipe 61. The bottoms of the two guide pipes 63 are respectively connected to the two sides of the inner tube 21. The two guide pipes 63 are connected to the circulation pipe 61. The bottoms of the two guide pipes 63 are connected to spray heads 64 by bolts. The spray heads 64 are used to spray water evenly. The two spray heads 64 are located inside the inner tube 21.

[0031] The closing mechanism includes an electric push rod 71, and the two electric push rods 71 ​​are respectively connected to the two sides of the air outlet of the conical tube 2 by bolts. The bottom of the filter box 23 is connected to a partition frame 72 by bolts. Two rotating plates 73 are rotatably connected to the two square holes of the filter box 23. The rotating plates 73 are used to block the square holes of the filter box 23. The two rotating plates 73 on the square holes of the same filter box 23 are a group. Sealing plates 74 are rotatably connected to both sides of the partition frame 72. The telescopic rods of the two electric push rods 71 ​​are bolted. A push rack 75 is connected, and the two push racks 75 are symmetrically arranged. The two push racks 75 are both slidably connected to the top of the filter box 23. Two rotating disks 76 are welded on the sides of the two groups of rotating plates 73 that are away from each other. There are four rotating disks 76 in total. The two rotating disks 76 on the two groups of rotating plates 73 are respectively slidably connected to the tops of the two push racks 75. A rotating disk 77 is welded on one side of each sealing plate 74. The two rotating disks 77 are symmetrically arranged. The two rotating disks 77 are respectively slidably connected to the bottoms of the two push racks 75.

[0032] The cleaning mechanism includes an absorption pump 82, and the two absorption pumps 82 are respectively connected to the two sides of the top of the conical cylinder 2 by bolts, and the two absorption pumps 82 are connected with a connecting pipe 81 by bolts. The bottoms of the two connecting pipes 81 are respectively connected to the two sides of the inner cylinder 21, and the connecting pipe 81 is used for exhausting air. The two sides of the filter box 23 are connected with an extension pipe 83 by bolts, and the two extension pipes 83 are respectively connected to the two sides of the filter box 23, and the two extension pipes 83 pass through the two sides of the air outlet of the conical cylinder 2, and the ends of the two extension pipes 83 away from each other are connected with a pressure valve 84 by bolts.

[0033] First, the staff aligns the air inlet of the conical cylinder 2 with the position where dust reduction is required, and connects the water source to the circulation pipe 61. Then the staff starts the drive motor 3 and the water pump 62 at the same time. The rotation of the output shaft of the drive motor 3 will drive the fan blades 4 to rotate at high speed through the belt transmission assembly 5. The rotation of the fan blades 4 will form a negative pressure in the inner cylinder 21 and the conical cylinder 2, so that the conical cylinder 2 will suck the external dust through the air inlet of the conical cylinder 2, and then the dust will enter the inner cylinder 21 through the bottom of the inner cylinder 21. At the same time, the water pump 62 will draw water into the circulation pipe 61, and the drawn water will be pumped into the guide pipe 63 and then evenly sprayed on the inside of the inner cylinder 21 through the spray head 64. The inhaled dust will absorb the sprayed water mist The dust is collected and weighed, and the rotating fan blades 4 cannot pull out the weighted dust, so that the dust falls into the collecting bin 1 due to gravity. A small part of the dust that has not absorbed the water mist will continue to move upward and adhere to the surface of the filter box 23, thereby performing secondary filtration on the dust, thereby making the dust reduction effect better. When the staff needs to clean the filter box 23, the staff starts one of the electric push rods 71, and the telescopic rod of the electric push rod 71 extends to drive the push frame 75 to move. The movement of the push frame 75 will drive two of the rotating disks 76 to rotate through squeezing, and the rotation of the two rotating disks 76 drives the two rotating plates 73 to rotate. The rotation of the two rotating plates 73 will block one of the square holes of the filter box 23, and the push frame 75 will squeeze the rotating disk 7 while moving. The rotation of the sealing plate 74 causes the sealing plate 74 to rotate. The rotation of the sealing plate 74 will contact one side of the inner wall of the inner tube 21 and form an independent space, so that the dust is filtered through the other side of the filter box 23. Then the staff starts one of the absorption pumps 82. The absorption pump 82 will pump the air between the sealing plate 74 and the inner tube 21 through the connecting pipe 81 to form a negative pressure. When the negative pressure reaches a certain pressure, the pressure valve 84 will open instantly, so that the external air will instantly enter the inside of the filter box 23 through the extension pipe 83 due to the pressure difference. Then the inhaled air will be blown from the inside of one side of the filter box 23 to the outside, so that the dust attached to the outside of the filter box 23 is blown off, and the blown off dust will enter the absorption pump 82 through the connecting pipe 81. , then the telescopic rod of the electric push rod 71 is shortened to drive the push frame 75 to reset. The reset of the push frame 75 drives the rotating plate 73 and the sealing plate 74 to reset together through the rotating disk 76 and the rotating disk 77. Then the staff starts another electric push rod 71 to clean the other side of the filter box 23. In this way, the filter box 23 can be cleaned alternately while dust reduction is being carried out, making the cleaning faster and more convenient, thereby improving the dust reduction efficiency. After the dust reduction is completed, the staff turns off the electric push rod 71, the absorption pump 82 and the drive motor 3, and then the staff opens the side cover 111, and cleans the dust collected in the aggregate bin 1 at the same time, and then the staff covers the side cover 111 back on the aggregate bin 1.

[0034] Embodiment 2: Based on embodiment 1, Figure 8-Figure 12As shown, it also includes an adsorption mechanism, which is arranged on the partition frame 72, and is used to adsorb dust after spraying. The adsorption mechanism includes a rotating filter 91, and the rotating filter 91 is rotatably connected to the bottom of the partition frame 72. The outer side of the bottom of the rotating filter 91 contacts the inner wall of the inner cylinder 21, and the rotating filter 91 is used to adsorb dust after contacting the water mist. The bottom of the rotating filter 91 is located below the spray head 64, and a support plate 92 and an upper cover plate 93 are welded to one side of the inner wall of the inner cylinder 21. The support plate 92 and the upper cover plate 93 are both in contact with the rotating filter 91, and the support plate 92 and the upper cover plate 93 are used to scrape off the rotating filter 91 The dust attached to the upper surface, one of the bottom of the connecting pipes 81 is connected with a suction pipe 94 by bolts, the bottom of the suction pipe 94 is connected to one side of the inner cylinder 21, the bottom of the suction pipe 94 is aligned between the support plate 92 and the upper cover plate 93, the suction pipe 94 is used to absorb the scraped dust, the top of the rotating filter 91 is connected with an overrunning clutch 96 by bolts, the outer side of the overrunning clutch 96 is connected with a guide screw 97 by bolts, the guide screw 97 is threadedly connected with a lower pressure ring 98, the lower pressure ring 98 is slidably connected to the partition frame 72, a reset spring 99 is placed between the lower pressure ring 98 and the rotating filter 91, and the reset spring 99 is sleeved on the rotating filter 91.

[0035] The bottom of the rotating filter screen 91 is located below the spray head 64 , and the water mist sprayed by the spray head 64 will adhere to the rotating filter screen 91 .

[0036] During spraying, the water mist sprayed by the spray head 64 will adhere to the rotating filter screen 91, and the rotating filter screen 91 with the water mist will further absorb the dust. When one of the sealing plates 74 rotates, it will squeeze the lower pressure ring 98 to move downward, and the return spring 99 will be compressed. When the lower pressure ring 98 moves downward, it will drive the overrunning clutch 96 and the rotating filter screen 91 to rotate together through the guide screw 97. The support plate 92 and the upper cover plate 93 will scrape the dust attached to the rotating filter screen 91 onto the support plate 92. At the same time, the absorption pump 82 will absorb the dust scraped off the support plate 92 through the connecting pipe 81 and the suction pipe 94. Then the sealing plate 74 is reset and no longer squeezes the lower pressure ring 98. The return spring 99 is reset to drive the lower pressure ring 98 to return to the original position. The reciprocating movement of the lower pressure ring 98 will drive the guide screw 97 to rotate reciprocally. The reciprocating rotation of the guide screw 97 will cause the rotating filter 91 to rotate intermittently in the same direction through the overrunning clutch 96, thereby causing the support plate 92 and the upper cover plate 93 to intermittently scrape off the dust attached to the rotating filter 91, thereby causing the rotating filter 91 to further absorb the dust, thereby making the dust reduction more sufficient, thereby enhancing the dust reduction effect.

[0037] Embodiment 3: Based on embodiment 2, Figure 3 As shown, a guide cone 12 is also included. The guide cone 12 is welded to the inner wall of the material collecting bin 1 . The guide cone 12 is located below the connection between the material collecting bin 1 and the conical cylinder 2 .

[0038] Before the dust falls into the aggregate bin 1, the dust will enter the aggregate bin 1 along the surface of the guide cone 12. Under the action of the guide cone 12, the dust that falls into the aggregate bin 1 is not easy to re-enter the conical tube 2 due to the rotation of the fan blades 4, and it is not easy to affect the dust reduction, thereby making the dust reduction effect better.

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

Claims

1. A dust suppression device for chemical production safety, characterized in that: The invention comprises a material collecting bin (1), wherein a material discharge port is provided on one side of the material collecting bin (1), a side cover plate (111) is clamped on the material discharge port of the material collecting bin (1), a conical cylinder (2) is fixedly connected to the material collecting bin (1), the bottom of the conical cylinder (2) is connected to the top of the material collecting bin (1), an air inlet is provided on one side of the conical cylinder (2), an air outlet is provided on the top of the conical cylinder (2), an inner cylinder (21) is fixedly connected inside the conical cylinder (2), a filter box (23) is fixedly connected to the air outlet of the conical cylinder (2), and two square shaped filter boxes (23) are symmetrically provided on the filter box (23). The conical cylinder (2) is provided with a driving motor (3) fixedly connected to the conical cylinder (2), a fan blade (4) is rotatably connected to the air outlet of the conical cylinder (2), the fan blade (4) is located above the filter box (23), a belt drive assembly (5) is connected between the top of the fan blade (4) and the output shaft of the driving motor (3), a spray mechanism for spraying air is provided on the conical cylinder (2), a closing mechanism for alternately blocking the filter box (23) is provided on the conical cylinder (2), and a cleaning mechanism for cleaning the filter box (23) is provided on the conical cylinder (2); The sealing mechanism comprises an electric push rod (71), wherein the two electric push rods (71) are respectively fixedly connected to both sides of the air outlet of the conical cylinder (2), a partition frame (72) is fixedly connected to the bottom of the filter box (23), two rotating plates (73) are rotatably connected to the two square holes of the filter box (23), and the two rotating plates (73) on the square hole of the same filter box (23) form a group, and sealing plates (74) are rotatably connected to both sides of the partition frame (72), and push frames (75) are fixedly connected to the telescopic rods of the two electric push rods (71), and the two push frames (75) are ) are symmetrically arranged, the two push racks (75) are slidably connected to the top of the filter box (23), two rotating disks (76) are fixedly connected on the sides of the two sets of rotating plates (73) away from each other, and there are four rotating disks (76) in total. The two rotating disks (76) on the two sets of rotating plates (73) are respectively slidably connected to the tops of the two push racks (75), and one side of each sealing plate (74) is fixedly connected to a rotating disk (77), and the two rotating disks (77) are symmetrically arranged, and the two rotating disks (77) are respectively slidably connected to the bottoms of the two push racks (75).

2. A dust suppression device for chemical production safety as claimed in claim 1, characterized in that: The spray mechanism comprises a circulation pipe (61), the circulation pipe (61) being fixedly connected to the conical cylinder (2), the circulation pipe (61) being fixedly connected to a water pump (62), the bottoms of both sides of the circulation pipe (61) being fixedly connected to flow guide pipes (63), the bottoms of the two flow guide pipes (63) being respectively connected to the two sides of the inner cylinder (21), the two flow guide pipes (63) being connected to the circulation pipe (61), the bottoms of the two flow guide pipes (63) being fixedly connected to spray heads (64), and the two spray heads (64) being located inside the inner cylinder (21).

3. A dust suppression device for chemical production safety as claimed in claim 2, characterized in that: The cleaning mechanism comprises an absorption pump (82), the two absorption pumps (82) being fixedly connected to both sides of the top of the conical cylinder (2), the two absorption pumps (82) being fixedly connected to a connecting pipe (81), the bottoms of the two connecting pipes (81) being respectively connected to both sides of the inner cylinder (21), the two sides of the filter box (23) being fixedly connected to an extension pipe (83), the two extension pipes (83) being respectively connected to both sides of the filter box (23), the two extension pipes (83) respectively passing through both sides of the air outlet of the conical cylinder (2), and the ends of the two extension pipes (83) being away from each other being fixedly connected to a pressure valve (84).

4. A dust suppression device for chemical production safety as claimed in claim 3, characterized in that: The invention also comprises an adsorption mechanism, which is arranged on the partition frame (72) and is used to adsorb dust after spraying. The adsorption mechanism comprises a rotating filter screen (91), which is rotatably connected to the bottom of the partition frame (72). The outer side of the bottom of the rotating filter screen (91) contacts the inner wall of the inner cylinder (21). A support plate (92) and an upper cover plate (93) are fixedly connected to one side of the inner wall of the inner cylinder (21). The support plate (92) is located below the upper cover plate (93). The support plate (92) and the upper cover plate (93) are both in contact with the rotating filter screen (91). The bottom of one of the connecting pipes (81) is fixedly connected to the rotating filter screen (91). A suction pipe (94) is connected, the bottom of the suction pipe (94) is communicated with one side of the inner cylinder (21), the bottom of the suction pipe (94) is aligned between the support plate (92) and the upper cover plate (93), the top of the rotating filter screen (91) is fixedly connected with an overrunning clutch (96), the outer side of the overrunning clutch (96) is fixedly connected with a guide screw (97), a lower pressure ring (98) is threadedly connected to the guide screw (97), the lower pressure ring (98) is slidably connected to the partition frame (72), a return spring (99) is placed between the lower pressure ring (98) and the rotating filter screen (91), and the return spring (99) is sleeved on the rotating filter screen (91).

5. A dust suppression device for chemical production safety as claimed in claim 4, characterized in that: The bottom of the rotating filter screen (91) is located below the spray head (64).

6. A dust suppression device for chemical production safety as claimed in claim 4, characterized in that: It also includes a guide cone (12), the guide cone (12) being fixedly connected to the inner wall of the material collection bin (1), the guide cone (12) being located below the connection between the material collection bin (1) and the conical cylinder (2).

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