Screening device for activated carbon and silica gel composite drying agent

Abstract

The utility model relates to the technical field of desiccant production, in particular to a screening device for an activated carbon silica gel composite desiccant, which comprises a box body, a feed port is arranged at the top of the box body, a discharge port is arranged at the bottom of the box body, a first screen drum and a second screen drum are rotatably arranged in the box body, the first screen drum is positioned right above the second screen drum, and the second screen drum is positioned right above the first screen drum. A first opening is formed in the top of the first screen drum, a plurality of first screen holes are formed in the bottom of the first screen drum, a second opening is formed in the top of the second screen drum, a plurality of second screen holes are formed in the bottom of the second screen drum, and the hole diameter of the first screen holes is larger than that of the second screen holes. The drying agent screening device has the effect of conveniently screening drying agent particles with different particle sizes.

Description

Technical Field

[0001] This utility model relates to the field of desiccant production technology, and in particular to a screening device for activated carbon and silica gel composite desiccant. Background Technology

[0002] Activated carbon and silica gel composite desiccant is a substance with the function of absorbing moisture and odor. In the production process of activated carbon and silica gel composite desiccant, modified activated carbon, modified molecular sieve, silica gel and binder are first mixed evenly, and then placed in an oven for drying. After drying, it is crushed and powdered, and then screened according to the specified particle size. After that, it is pressed into tablets by a tablet press, and finally calcined under nitrogen. After cooling, the activated carbon and silica gel composite desiccant is obtained.

[0003] A related technology, Chinese patent CN212856564U, discloses a screening device for desiccant production. The device includes a cylinder with an inlet at the top and an outlet at the bottom. Multiple screening screens are arranged at an angle inside the cylinder, with the mesh size decreasing from top to bottom. All screens are tilted to the same side, and a receiving box is installed at the tilted end of each screen. Desiccant is fed into the cylinder through the inlet, the screening screens classify and screen the desiccant, and the receiving boxes collect the screened desiccant.

[0004] In the process of developing this application, the inventors discovered that the technology has at least the following problems: Since the screening screen is set at an angle, the desiccant will accumulate on the lower side of the screening screen under the influence of gravity, which easily leads to the phenomenon that small-diameter desiccant is blocked by large-diameter desiccant and cannot be screened to the next stage, thus affecting the screening quality of the desiccant. Utility Model Content

[0005] To facilitate the screening of desiccant particles of different sizes, this application provides a screening device for activated carbon and silica gel composite desiccants.

[0006] The screening device for activated carbon and silica gel composite desiccant provided in this application adopts the following technical solution:

[0007] A screening device for activated carbon and silica gel composite desiccant includes a housing with an inlet at the top and an outlet at the bottom. A first sieve cylinder and a second sieve cylinder are rotatably arranged inside the housing, with the first sieve cylinder located directly above the second sieve cylinder. The first sieve cylinder has a first opening at its top and a plurality of first sieve holes at its bottom. The second sieve cylinder has a second opening at its top and a plurality of second sieve holes at its bottom. The diameter of the first sieve holes is larger than the diameter of the second sieve holes.

[0008] By adopting the above technical solution, the material to be screened is fed into the box through the inlet. The material first falls into the first screen cylinder through the first opening. After all the material has fallen into the first screen cylinder, the first screen cylinder is oscillated, causing the material to sway within the first screen cylinder. This reduces the accumulation of material on one side of the first screen cylinder, allowing material with a particle size larger than the first screen aperture to remain in the first screen cylinder, while material with a particle size smaller than the first screen aperture passes through the first screen aperture and falls into the second screen cylinder through the second opening. After the material has been screened through the first screen cylinder, the second screen cylinder is oscillated, causing the material to sway within the second screen cylinder. This reduces the accumulation of material on one side of the second screen cylinder, allowing material with a particle size larger than the second screen aperture to remain in the second screen cylinder, while material with a particle size smaller than the second screen aperture passes through the second screen aperture and falls out of the box through the outlet. After the material has been screened through the second screen cylinder, material with a particle size smaller than the second screen aperture below the outlet is discharged. The material is collected in a multi-stage sieve. After all the material with a particle size smaller than the second sieve aperture has been collected, the second sieve cylinder is flipped so that the material inside the second sieve cylinder falls through the second opening. After the material inside the second sieve cylinder falls out of the discharge port, the material with a particle size between the first and second sieve apertures below the discharge port is collected. After all the material with a particle size between the first and second sieve apertures has been collected, the second sieve cylinder is flipped again, moving the second opening above the second sieve aperture. Then the first sieve cylinder is flipped so that the material with a particle size larger than the first sieve aperture passes through the first opening and falls into the second sieve cylinder through the second opening. After all the material in the first sieve cylinder has entered the second sieve cylinder, the second sieve cylinder is flipped so that the material with a particle size larger than the first sieve aperture passes through the second opening and falls out of the discharge port. This achieves the effect of multi-stage sieving and multi-stage collection of the material. The oscillation of the first and second sieve cylinders reduces the accumulation of material.

[0009] Preferably, a first rotating shaft is provided through the side wall of the box, the first rotating shaft is rotatably connected to the box, one end of the first rotating shaft inside the box is fixedly connected to the end wall of the first screen cylinder, a first gear is fixedly provided at one end of the first rotating shaft on the outer wall of the box, and a first rack is slidably provided on the outer wall of the box, the first gear and the first rack mesh with each other.

[0010] By adopting the above technical solution, the first rack slides and drives the first gear to rotate, the first gear rotates and drives the first shaft to rotate, and the first shaft rotates and drives the first screen cylinder to swing and flip.

[0011] Preferably, a first support is fixedly installed on the outer wall of the housing, a first motor is fixedly installed on the first support, a first screw is fixedly installed on the output shaft of the first motor, the first screw is rotatably connected to the first support, a first guide rod is fixedly installed on the first support, the first guide rod and the first screw are parallel to each other, a first support block is fixedly installed on the first rack, the first guide rod passes through the first support block, and the first screw is threadedly connected to the first support block.

[0012] By adopting the above technical solution, the first motor starts and drives the first screw to rotate, the rotation of the first screw drives the first support block to move along the first guide rod, and the movement of the first support block drives the first rack to slide on the housing.

[0013] Preferably, a second rotating shaft is provided through the side wall of the box, the second rotating shaft is rotatably connected to the box, one end of the second rotating shaft inside the box is fixedly connected to the end wall of the second screen cylinder, a second gear is fixedly provided at one end of the second rotating shaft on the outer wall of the box, and a second rack is slidably provided on the outer wall of the box, the second gear and the second rack mesh with each other.

[0014] By adopting the above technical solution, the second rack slides and drives the second gear to rotate, the second gear rotates and drives the second shaft to rotate, and the second shaft rotates and drives the second screen cylinder to swing and flip.

[0015] Preferably, a second support is fixedly installed on the outer wall of the housing, a second motor is fixedly installed on the second support, a second screw is fixedly installed on the output shaft of the second motor, the second screw is rotatably connected to the second support, a second guide rod is fixedly installed on the second support, the second guide rod is parallel to the second screw, a second support block is fixedly installed on the second rack, the second guide rod passes through the first support block, and the second screw is threadedly connected to the second support block.

[0016] By adopting the above technical solution, the second motor starts and drives the second screw to rotate. The rotation of the second screw drives the second support block to move along the second guide rod. The movement of the second support block drives the second rack to slide on the housing.

[0017] Preferably, a first guide hopper is fixedly installed inside the box, with a first inlet at the top of the first guide hopper, the first inlet being located below the feed inlet, the inner wall of the first inlet being connected to the inner wall of the box, and a first outlet at the bottom of the first guide hopper, the first outlet being located above the first screen cylinder, and the size of the first outlet being smaller than the size of the first opening.

[0018] By adopting the above technical solution, when the material is put into the box through the feed inlet, the material is put into the first screen cylinder through the first guide hopper. Since the first inlet of the first guide hopper is larger than the feed inlet of the box, it is convenient for the material to enter the first guide hopper. Since the first outlet of the first guide hopper is smaller than the first opening of the first screen cylinder, it is convenient for the material to enter the first screen cylinder through the first guide hopper.

[0019] Preferably, a second guide hopper is fixedly installed inside the box, with a second inlet at the top of the second guide hopper, the second inlet being located below the first screen cylinder, the inner wall of the second inlet being connected to the inner wall of the box, and a second outlet at the bottom of the second guide hopper, the second outlet being located above the second screen cylinder, the size of the second outlet being smaller than the size of the second opening.

[0020] By adopting the above technical solution, after the material passes through the first screen hole, the material is fed into the second screen cylinder through the second guide hopper. Since the second inlet of the second guide hopper is larger than the coverage area of ​​the first screen hole, it is convenient for the material to enter the second guide hopper. Since the second outlet of the second guide hopper is smaller than the second opening of the second screen cylinder, it is convenient for the material to enter the second screen cylinder from the second guide hopper.

[0021] Preferably, a number of support legs are fixedly installed at the bottom of the box, and a base is fixedly installed at the bottom of the support legs. A slide rail is fixedly installed on the base, and a slide block is slidably installed on the slide rail. A number of receiving boxes are installed on the slide block, and the receiving boxes are located below the discharge port.

[0022] By adopting the above technical solution, when the material is discharged from the outlet of the box, the material falls into the receiving box, which receives the material. After the receiving box has finished receiving the material, the sliding slide moves the current receiving box away from the bottom of the receiving box and moves another receiving box below the outlet, thus achieving the effect of classifying and collecting desiccants of different particle sizes.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By setting up a box, inlet, outlet, first screen cylinder, second screen cylinder, first opening, first screen hole, second opening and second screen hole, the material can be screened and collected in multiple stages. The material accumulation is reduced by swinging the first screen cylinder and the second screen cylinder.

[0025] 2. By setting a first rotating shaft, a first gear, a first rack, a first support, a first motor, a first screw, a first guide rod, and a first support block, the effect of driving the first screen cylinder to swing and rotate is achieved;

[0026] 3. By setting a second rotating shaft, a second gear, a second rack, a second support, a second motor, a second screw, a second guide rod, and a second support block, the effect of driving the second screen cylinder to swing and flip can be achieved. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a screening device for activated carbon and silica gel composite desiccant in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram illustrating the connection relationship between the first rotating shaft and the first support in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram illustrating the connection relationship between the second rotating shaft and the second support in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Feed inlet; 12. Discharge outlet; 2. First screen cylinder; 21. First opening; 22. First screen hole; 3. Second screen cylinder; 31. Second opening; 32. Second screen hole; 4. Receiving box; 41. Slide seat; 42. Slide rail; 43. Base; 44. Support leg; 5. First rotating shaft; 51. First gear; 52. First rack; 53. First support; 54. First motor; 55. First screw; 56. First guide rod; 57. First support block; 6. Second rotating shaft; 61. Second gear; 62. Second rack; 63. Second support; 64. Second motor; 65. Second screw; 66. Second guide rod; 67. Second support block; 7. First guide hopper; 71. First inlet; 72. First outlet; 8. Second guide hopper; 81. Second inlet; 82. Second outlet. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0032] This application discloses a screening device for activated carbon and silica gel composite desiccant. (Refer to...) Figure 1The system includes a housing 1, with a feed inlet 11 at the top and a discharge outlet 12 at the bottom. Several support legs 44 are mounted at the bottom of the housing 1, and a base 43 is welded to the bottom of each support leg 44. A slide rail 42 is mounted on the base 43, and a sliding seat 41 is slidably mounted on the slide rail 42. Three receiving boxes 4 are placed on the sliding seat 41, all located below the discharge outlet 12. A first screen cylinder 2 and a second screen cylinder 3 are rotatably mounted inside the housing 1, with the first screen cylinder 2 directly above the second screen cylinder 3. The first screen cylinder 2 has a first opening 21 at the top and several first screen holes 22 at the bottom. The second screen cylinder 3 has a second opening 31 at the top and several second screen holes 32 at the bottom. The diameter of the first screen holes 22 is larger than the diameter of the second screen holes 32. Material to be screened is fed into the housing 1 through the feed inlet 11, and the material first falls from the first opening 21 into the first screen cylinder 2. After all the material has fallen into the first screen cylinder 2, the first screen cylinder 2 is oscillated, causing the material to sway within it. This reduces material accumulation on one side of the first screen cylinder 2, allowing material with a diameter larger than the first screen aperture 22 to remain inside the first screen cylinder 2, while material with a diameter smaller than the first screen aperture 22 passes through the first screen aperture 22 and falls into the second screen cylinder 3 through the second opening 31. After the material has been screened by the first screen cylinder 2, the second screen cylinder 3 is oscillated, causing the material to sway within it. This reduces material accumulation on one side of the second screen cylinder 3, allowing material with a diameter larger than the second screen aperture 32 to remain inside the second screen cylinder 3, while material with a diameter smaller than the second screen aperture 32 passes through the second screen aperture 32 and falls out of the box 1 through the discharge port 12. During the screening process in the second screen cylinder 3, material with a diameter smaller than the second screen aperture 32 falls from the discharge port 12 into the first receiving box 4. After all the material with a particle size smaller than the second sieve aperture 32 has been collected, first slide the slide block 41 to move the second receiving box 4 below the discharge port 12, then flip the second sieve cylinder 3 so that the material inside the second sieve cylinder 3 falls through the second opening 31. The second receiving box 4 collects the material with a particle size between the first sieve aperture 22 and the second sieve aperture 32. After all the material with a particle size between the first sieve aperture 22 and the second sieve aperture 32 in the second sieve cylinder 3 has fallen into the second receiving box 4, slide the slide block 41 again and flip the second sieve cylinder 3 to move the last receiving box 4 below the discharge port 12, and move the second opening 31 above the second sieve aperture 32. Then flip the first sieve cylinder 2 so that the material with a particle size larger than the first sieve aperture 22 passes through the first opening 21 and falls into the second sieve cylinder 3 through the second opening 31. After all the material in the first screen cylinder 2 enters the second screen cylinder 3, the second screen cylinder 3 is flipped so that the material with a particle size larger than the aperture of the first screen hole 22 passes through the second opening 31 and falls out of the discharge port 12. The last receiving box 4 collects the material with a particle size larger than the aperture of the first screen hole 22.This achieves the effect of multi-stage screening and collection of materials, and reduces material accumulation by swinging the first screen cylinder 2 and the second screen cylinder 3.

[0033] To drive the first screen cylinder 2 to swing and flip, refer to Figure 1 and Figure 2 A first support 53 is installed on the outer wall of the housing 1, and a first motor 54 is installed on the first support 53. A first screw 55 is installed on the output shaft of the first motor 54, and the first screw 55 is rotatably connected to the first support 53. A first guide rod 56 is installed on the first support 53, and the first guide rod 56 is parallel to the first screw 55. A first support block 57 is connected to both the first guide rod 56 and the first screw 55, and the first guide rod 56 passes through the first support block 57. The first screw 55 is threadedly connected to the first support block 57. A first rotating shaft 5 is installed through the side wall of the housing 1, and the first rotating shaft 5 is rotatably connected to the housing 1. One end of the first rotating shaft 5 is welded to the end wall of the first screen cylinder 2 inside the housing 1, and a first gear 51 is installed on the other end of the first rotating shaft 5 on the outer wall of the housing 1. A first rack 52 is slidably arranged on the outer wall of the housing 1, and the first rack 52 is installed on the first support block 57. The first gear 51 and the first rack 52 mesh with each other. The first motor 54 starts and drives the first screw 55 to rotate. The rotation of the first screw 55 drives the first support block 57 to move along the first guide rod 56. The movement of the first support block 57 drives the first rack 52 to slide on the housing 1. The sliding of the first rack 52 drives the first gear 51 to rotate. The rotation of the first gear 51 drives the first rotating shaft 5 to rotate. The rotation of the first rotating shaft 5 drives the first screen cylinder 2 to swing and flip.

[0034] To drive the second screen cylinder 3 to swing and flip, refer to Figure 1 and Figure 3A second support 63 is installed on the outer wall of the housing 1, and a second motor 64 is installed on the second support 63. A second screw 65 is installed on the output shaft of the second motor 64, and the second screw 65 is rotatably connected to the second support 63. A second guide rod 66 is installed on the second support 63, and the second guide rod 66 is parallel to the second screw 65. A second support block 67 is connected to both the second guide rod 66 and the second screw 65, and the second guide rod 66 passes through the second support block 67. The second screw 65 is threadedly connected to the second support block 67. A second rotating shaft 6 is installed through the side wall of the housing 1, and the second rotating shaft 6 is rotatably connected to the housing 1. One end of the second rotating shaft 6 inside the housing 1 is welded to the end wall of the second screen cylinder 3, and a second gear 61 is installed on the other end of the second rotating shaft 6 on the outer wall of the housing 1. A second rack 62 is slidably arranged on the outer wall of the housing 1, and the second rack 62 is installed on the second support block 67. The second gear 61 and the second rack 62 mesh with each other. The second motor 64 starts and drives the second screw 65 to rotate. The rotation of the second screw 65 drives the second support block 67 to move along the second guide rod 66. The movement of the second support block 67 drives the second rack 62 to slide on the housing 1. The sliding of the second rack 62 drives the second gear 61 to rotate. The rotation of the second gear 61 drives the second rotating shaft 6 to rotate. The rotation of the second rotating shaft 6 drives the second screen cylinder 3 to swing and flip.

[0035] To facilitate material entry into the first screen cylinder 2, refer to... Figure 1 A first guide hopper 7 is installed inside the housing 1. The first guide hopper 7 has a first inlet 71 at its top and a first outlet 72 at its bottom. When material is fed into the housing 1 through the inlet 11, it flows through the first guide hopper 7 into the first screen cylinder 2. The first inlet 71 is located below the inlet 11, and its inner wall is connected to the inner wall of the housing 1. Because the first inlet 71 of the first guide hopper 7 is larger than the inlet 11 of the housing 1, it facilitates the entry of material into the first guide hopper 7. The first outlet 72 is located above the first screen cylinder 2, and its size is smaller than the size of the first opening 21. Because the first outlet 72 of the first guide hopper 7 is smaller than the first opening 21 of the first screen cylinder 2, it facilitates the entry of material from the first guide hopper into the first screen cylinder 2.

[0036] To facilitate material entry into the second screen cylinder 3, refer to... Figure 1A second guide hopper 8 is installed inside the housing 1. The second guide hopper 8 has a second inlet 81 at its top and a second outlet 82 at its bottom. After the material passes through the first screen hole 22, it enters the second screen cylinder 3 through the second guide hopper 8. The second inlet 81 is located below the first screen cylinder 2, and its inner wall is connected to the inner wall of the housing 1. Because the second inlet 81 of the second guide hopper 8 is larger than the coverage area of ​​the first screen hole 22, it facilitates the entry of material into the second guide hopper 8. The second outlet 82 is located above the second screen cylinder 3, and its size is smaller than the size of the second opening 31. Because the second outlet 82 of the second guide hopper 8 is smaller than the second opening 31 of the second screen cylinder 3, it facilitates the entry of material from the second guide hopper into the second screen cylinder 3.

[0037] The implementation principle of the screening device for activated carbon and silica gel composite desiccant in this application embodiment is as follows: The material to be screened is fed into the box 1 through the feed inlet 11. The material first falls into the first screen cylinder 2 through the first opening 21. After all the material has fallen into the first screen cylinder 2, the first screen cylinder 2 is oscillated, thereby causing the material to shake within the first screen cylinder 2. This reduces the accumulation of material on one side of the first screen cylinder 2, allowing material with a particle size larger than the aperture of the first screen hole 22 to remain in the first screen cylinder 2, while material with a particle size smaller than the aperture of the first screen hole 22 passes through the first screen hole 22 and falls into the second screen cylinder 3 through the second opening 31. After the material has been screened through the first screen cylinder 2, the second screen cylinder 3 is oscillated, thereby causing the material to shake within the second screen cylinder 3. This reduces the accumulation of material on one side of the second screen cylinder 3, allowing material with a particle size larger than the aperture of the second screen hole 32 to remain in the second screen cylinder 3, while material with a particle size smaller than the aperture of the second screen hole 32 passes through the second screen hole 32 and falls out of the box 1 through the discharge outlet 12. During the screening process of the material through the second screen cylinder 3, materials with a particle size smaller than the aperture of the second screen 32 fall from the discharge port 12 into the first receiving box 4. After all the materials with a particle size smaller than the aperture of the second screen 32 have been collected, the slide block 41 is slid first to move the second receiving box 4 below the discharge port 12, and then the second screen cylinder 3 is flipped so that the materials in the second screen cylinder 3 fall from the second opening 31. The second receiving box 4 collects materials with a particle size between the aperture of the first screen 22 and the aperture of the second screen 32. After all the materials with a particle size between the aperture of the first screen 22 and the aperture of the second screen 32 in the second screen cylinder 3 have fallen into the second receiving box 4, the slide block 41 is slid again and the second screen cylinder 3 is flipped so that the last receiving box 4 is moved below the discharge port 12 and the second opening 31 is moved above the second screen 32. Then the first screen cylinder 2 is flipped so that materials with a particle size larger than the aperture of the first screen 22 pass through the first opening 21 and fall into the second screen cylinder 3 through the second opening 31. After all the material in the first screen cylinder 2 has entered the second screen cylinder 3, the second screen cylinder 3 is flipped, allowing material with a particle size larger than the aperture of the first screen hole 22 to pass through the second opening 31 and fall out of the discharge port 12. The last receiving box 4 collects the material with a particle size larger than the aperture of the first screen hole 22. This achieves the effect of multi-stage screening and multi-stage collection of materials, and the oscillation of the first screen cylinder 2 and the second screen cylinder 3 reduces the accumulation of materials.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An active carbon silica gel composite desiccant screening device, comprising a box, a feeding port is formed on the top of the box, and a discharging port is formed on the bottom of the box, characterized in that: The first sieve cylinder and the second sieve cylinder are rotatably arranged inside the box. The first sieve cylinder is located directly above the second sieve cylinder. The first sieve cylinder has a first opening at its top and a plurality of first sieve holes at its bottom. The second sieve cylinder has a second opening at its top and a plurality of second sieve holes at its bottom. The diameter of the first sieve holes is larger than the diameter of the second sieve holes.

2. The screening device for activated carbon and silica gel composite desiccant according to claim 1, characterized in that: A first rotating shaft is provided through the side wall of the box, and the first rotating shaft is rotatably connected to the box. One end of the first rotating shaft inside the box is fixedly connected to the end wall of the first screen cylinder. A first gear is fixedly provided at one end of the first rotating shaft on the outer wall of the box. A first rack is slidably provided on the outer wall of the box, and the first gear and the first rack mesh with each other.

3. The screening device for activated carbon silica gel composite desiccant according to claim 2, characterized in that: A first support is fixedly installed on the outer wall of the housing. A first motor is fixedly installed on the first support. A first screw is fixedly installed on the output shaft of the first motor. The first screw is rotatably connected to the first support. A first guide rod is fixedly installed on the first support. The first guide rod and the first screw are parallel to each other. A first support block is fixedly installed on the first rack. The first guide rod passes through the first support block. The first screw is threadedly connected to the first support block.

4. The screening device for activated carbon and silica gel composite desiccant according to claim 1, characterized in that: A second rotating shaft is provided through the side wall of the box, and the second rotating shaft is rotatably connected to the box. One end of the second rotating shaft inside the box is fixedly connected to the end wall of the second screen cylinder. A second gear is fixedly provided at one end of the second rotating shaft on the outer wall of the box. A second rack is slidably provided on the outer wall of the box, and the second gear and the second rack mesh with each other.

5. The screening device for activated carbon silica gel composite desiccant according to claim 4, characterized in that: A second support is fixedly installed on the outer wall of the housing. A second motor is fixedly installed on the second support. A second screw is fixedly installed on the output shaft of the second motor. The second screw is rotatably connected to the second support. A second guide rod is fixedly installed on the second support. The second guide rod and the second screw are parallel to each other. A second support block is fixedly installed on the second rack. The second guide rod passes through the first support block. The second screw is threadedly connected to the second support block.

6. The screening device for activated carbon silica gel composite desiccant according to claim 1, characterized in that: A first guide hopper is fixedly installed inside the box. A first inlet is opened at the top of the first guide hopper. The first inlet is located below the feed port. The inner wall of the first inlet is connected to the inner wall of the box. A first outlet is opened at the bottom of the first guide hopper. The first outlet is located above the first screen cylinder. The size of the first outlet is smaller than the size of the first opening.

7. The screening device for activated carbon silica gel composite desiccant according to claim 1, characterized in that: A second guide hopper is fixedly installed inside the box. A second inlet is opened at the top of the second guide hopper. The second inlet is located below the first screen cylinder. The inner wall of the second inlet is connected to the inner wall of the box. A second outlet is opened at the bottom of the second guide hopper. The second outlet is located above the second screen cylinder. The size of the second outlet is smaller than the size of the second opening.

8. The screening device for activated carbon silica gel composite desiccant according to claim 1, characterized in that: Several support legs are fixedly installed at the bottom of the box body, and a base is fixedly installed at the bottom of the support legs. A slide rail is fixedly installed on the base, and a slide block is slidably installed on the slide rail. Several material receiving boxes are installed on the slide block, and the material receiving boxes are located below the discharge port.

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