Vacuum type disc dryer

Abstract

The utility model relates to a vacuum type disc dryer, which aims to solve the technical problems that redundant gas is directly discharged through a gas outlet at present, and due to the fact that dry material dust is mixed in the discharged gas, the environment is polluted and materials are wasted when the gas is directly discharged, and comprises a collecting mechanism, a discharging mechanism and a discharging mechanism, the collecting mechanism comprises an air outlet pipe communicated to one side of the top of the tank body, the air outlet pipe is communicated with a material removing barrel, a barrel cover is connected to an opening in the top of the material removing barrel through a bolt, the top of the barrel cover is communicated with an air suction pipe, and the other end of the air suction pipe is communicated with a negative pressure pump; a dust collection bag is mounted at one end, away from the air suction pipe, of the cylinder cover; the recycling mechanism comprises a guide pipe communicated with the bottom of the material removing barrel and a feeding hopper communicated with the side, away from the air outlet pipe, of the top of the tank body, and the material dust is prevented from being directly discharged to pollute the environment, and waste caused by discharging of the material dust is avoided.

Description

Technical Field

[0001] This utility model relates to the field of disc dryers, specifically a vacuum disc dryer. Background Technology

[0002] The vacuum disc dryer is a multi-layered, fixed, hollow, heated circular material carrier with rotating rakes, developed through continuous improvement and incorporating a series of advanced technologies based on the intermittent stirring conduction dryer. It is a vertical, continuous drying device primarily utilizing heat conduction. The drying process involves passing a heat carrier through each layer of hollow discs, indirectly heating the wet material placed on the disc surface via heat conduction. Under the scraping action of the rotating rake blades, the moisture in the constantly moving and tumbling material evaporates at the operating temperature. The vapor is discharged with the equipment's exhaust gas, thus continuously obtaining qualified dried products at the bottom of the equipment. In recent years, many countries have widely applied it in the chemical, dye, pesticide, plastics, pharmaceutical, and food industries, continuously improving it through use. Compared with traditional drying equipment, it has advantages such as high thermal efficiency, low energy consumption, uniform drying, good product quality, small footprint, fewer auxiliary equipment, less pollution, continuous production, convenient operation, and wide applicability.

[0003] According to publicly available patent CN214620298U, a vacuum disc dryer is disclosed. The vacuum disc dryer includes a shell; four support columns symmetrically fixedly installed at the bottom of the shell; a balance plate fixedly installed between the four support columns; an air outlet located at the top of the shell; a crushing and feeding mechanism disposed on the shell; and a drying mechanism disposed inside the shell. In implementing this invention, traditional methods directly discharge excess gas through the air outlet. Since the discharged gas contains dried material dust, direct discharge not only pollutes the environment but also wastes materials. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a vacuum disc dryer to solve the technical problem that the current method of directly discharging excess gas through the outlet not only pollutes the environment but also wastes materials because the discharged gas contains dried material dust.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: A vacuum disc dryer is designed, comprising:

[0006] The collection mechanism includes an air outlet pipe connected to one side of the top of the tank, a material removal cylinder connected to the air outlet pipe, a cylinder cover connected to the top opening of the material removal cylinder by bolts, an air suction pipe connected to the top of the cylinder cover, a negative pressure pump connected to the other end of the air suction pipe, and a dust collection bag installed at the end of the cylinder cover away from the air suction pipe.

[0007] The recycling mechanism includes a conduit connected to the bottom of the discharge cylinder and a feed hopper connected to the top of the tank on the side away from the vent pipe. The bottom of the conduit is connected to a conveying pipe, one end of which is connected to the feed hopper. A first drive motor is installed at one end of the conveying pipe. A rotating shaft is rotatably connected to the inner cavity of the conveying pipe. A helical blade is installed on the outer side of the rotating shaft. The drive end of the first drive motor rotates through the conveying pipe and is connected to the rotating shaft through a coupling.

[0008] Preferably, the inner cavity of the tank is provided with a drying mechanism, which includes a drive shaft rotatably connected to the middle of the tank. Multiple large and small drying discs with hollow structures are arranged inside the tank, and these discs are arranged in a staggered pattern. A discharge hole is opened in the middle of each large drying disc. Multiple rake arms are mounted on the outer side of the drive shaft, and rake blades are mounted on each rake arm. The bottom of each rake blade moves against the surface of the large and small drying discs. The rake blades on the large and small drying discs face opposite directions. Inlet and outlet pipes are respectively connected to both ends of each of the large and small drying discs, and both the inlet and outlet pipes penetrate the tank and are located on the outer side of the tank.

[0009] Preferably, the recycling mechanism further includes a second drive motor installed on one side of the top of the cylinder cover. The drive end of the second drive motor rotates through the cylinder cover and is connected to a gear. A bag frame is provided on the inner side of the dust collector bag, and a toothed ring is fitted on the outer side of the dust collector bag. A T-shaped annular groove is opened on the cylinder cover. Two T-shaped sliders are slidably connected in the annular groove. A connecting rod is connected between the two sliders and the toothed ring. The gear meshes with the toothed ring. Brush plates are installed on both sides of the bottom of the toothed ring, and the bristles on the two brush plates are in contact with the dust collector bag.

[0010] Preferably, an annular heating plate is installed at the top of the inner cavity of both the large and small drying trays, and a vacuum is set between the annular heating plate and the large and small drying trays. The inlet pipe and outlet pipe are both connected to the annular heating plate.

[0011] Preferably, multiple connecting shafts are rotatably connected between the two sides of the inner cavity of the annular heating plate, and four baffles are installed on the outer side of each of the multiple connecting shafts.

[0012] Preferably, a discharge pipe is connected to one side of the bottom of the tank, and the discharge pipe is L-shaped.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model combines a negative pressure pump, a suction pipe, a material removal cylinder, a dust collector bag, a first drive motor, an annular groove, a slider, a connecting rod, gears, a gear ring, a conveying pipe, a second drive motor, spiral blades, and a brush plate. When drying materials, the negative pressure pump is started to draw water vapor and dust generated during material drying into the material removal cylinder. The dust collector bag filters the air and material dust, trapping the dust on the outside of the bag. Then, the second motor is started to drive the gears to rotate. Since the slider is connected in the annular groove, it works with the gear ring to drive the brush plate to rotate circumferentially on the outside of the dust collector bag. The brush plate cleans and removes the material dust from the outside of the bag. The cleaned material dust enters the conveying pipe through a conduit. Then, the first drive motor is started to drive the spiral blades to transport the cleaned material dust to the feed hopper, where it is reintroduced into the tank for drying. This not only avoids direct discharge of material dust that could pollute the environment but also prevents waste caused by the discharge of material dust.

[0015] 2. This utility model combines a ring-shaped heating plate, a baffle plate, and a connecting shaft. When the heating medium is input, it is fed into the ring-shaped heating plate. Since a vacuum is set between the ring-shaped heating plate and the large and small drying trays, the heat loss of the heating medium is reduced. As the heating medium flows, it pushes the baffle plate to rotate, which effectively slows down the flow of the heating medium within the ring-shaped heating plate. This allows the heating medium to fully heat the surfaces of the large and small drying trays, further improving the drying effect of the material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure between the material removal cylinder, the conveying pipe, and the feed hopper of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the drive shaft and the large and small drying trays of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the large drying tray of this utility model;

[0020] Figure 5 This is a cross-sectional view of the connection between the large drying tray and the annular heating tray of this utility model;

[0021] Figure 6 This is a schematic diagram of the internal structure of the annular heating plate, connecting shaft, and baffle plate of this utility model.

[0022] Figure 7 This is a front sectional view of the conveying pipe of this utility model;

[0023] Figure 8 This is a schematic diagram of the connection structure between the cylinder cap and the toothed ring of this utility model.

[0024] In the diagram: 1. Tank body; 11. Discharge pipe; 12. Feed hopper; 13. Inlet pipe; 14. Outlet pipe; 15. Drive shaft; 16. Rake arm; 17. Rake blade; 18. Large drying tray; 19. Small drying tray; 110. Discharge hole; 2. Air outlet pipe; 21. Material removal cylinder; 22. Negative pressure pump; 23. Suction pipe; 24. Guide pipe; 25. Cylinder cover; 26. Dust collector bag; 3. Conveying pipe; 31. First drive motor; 32. Spiral blade; 33. Rotating shaft; 4. Second drive motor; 41. Gear; 42. Annular groove; 43. Slider; 44. Connecting rod; 45. Gear ring; 46. Brush plate; 5. Annular heating plate; 51. Connecting shaft; 52. Baffle plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Example 1: A vacuum disc dryer, see [link to example]. Figures 1 to 8 ,include:

[0027] The collection mechanism includes an air outlet pipe 2 connected to one side of the top of the tank 1, a material removal cylinder 21 connected to the air outlet pipe 2, a cylinder cover 25 bolted to the top opening of the material removal cylinder 21, a suction pipe 23 connected to the top of the cylinder cover 25, a negative pressure pump 22 connected to the other end of the suction pipe 23, and a dust collector bag 26 installed at the end of the cylinder cover 25 away from the suction pipe 23; the recycling mechanism includes a conduit 24 connected to the bottom of the material removal cylinder 21 and a feed hopper 12 connected to the top of the tank 1 away from the air outlet pipe 2, a conveying pipe 3 connected to the bottom of the conduit 24, one end of the conveying pipe 3 connected to the feed hopper 12, a first drive motor 31 installed at one end of the conveying pipe 3, and a rotating shaft 33 rotatably connected to the inner cavity of the conveying pipe 3. Spiral blades 32 are installed on the outside of the 3. The drive end of the first drive motor 31 rotates through the conveying pipe 3 and is connected to the rotating shaft 33 through a coupling. The recycling mechanism also includes a second drive motor 4 installed on one side of the top of the cylinder cover 25. The drive end of the second drive motor 4 rotates through the cylinder cover 25 and is connected to a gear 41. A bag frame is provided on the inner side of the dust collector bag 26. A toothed ring 45 is sleeved on the outer side of the dust collector bag 26. A T-shaped annular groove 42 is opened on the cylinder cover 25. Two T-shaped sliders 43 are slidably connected in the annular groove 42. A connecting rod 44 is connected between the two sliders 43 and the toothed ring 45. The gear 41 meshes with the toothed ring 45. Brush plates 46 are installed on both sides of the bottom of the toothed ring 45, and the bristles on the two brush plates 46 are in contact with the dust collector bag 26.

[0028] During operation, when drying materials, the negative pressure pump 22 is started to draw the water vapor and dust generated during the drying process in the tank 1 into the material removal cylinder 21. The air and material dust are filtered through the dust collector bag 26, and the material dust is retained on the outside of the dust collector bag 26. Then, the second motor is started to drive the gear 41 to rotate. Since the slider 43 is rotated and connected in the annular groove 42, it works with the gear ring 45 to drive the brush plate 46 to rotate circumferentially on the outside of the dust collector bag 26. Thus, the brush plate 46 cleans and removes the material dust on the outside of the dust collector bag 26. The cleaned material dust enters the conveying pipe 3 through the conduit 24. Then, the first drive motor 31 is started to drive the spiral blade 32 to rotate and transport the cleaned material dust to the feed hopper 12, and then it is added back into the tank 1 for drying. This not only avoids the direct discharge of material dust and the resulting environmental pollution, but also avoids the waste caused by the discharge of material dust.

[0029] For details, see Figure 3The inner cavity of the tank body 1 is equipped with a drying mechanism, which includes a drive shaft 15 rotatably connected to the middle of the tank body 1. Multiple large drying trays 18 and small drying trays 19 with hollow structures are arranged inside the tank body 1, with the large drying trays 18 and small drying trays 19 arranged alternately. A discharge hole 110 is opened in the middle of each large drying tray 18. Multiple rake arms 16 are mounted on the outer side of the drive shaft 15, and rake blades 17 are mounted on each rake arm 16. The bottom of each rake blade 17 moves against the surface of the large drying trays 18 and small drying trays 19. The rake blades 17 on the large drying trays 18 and small drying trays 19 face opposite directions. Inlet pipes 13 and outlet pipes 14 are respectively connected to both ends of each of the large drying trays 18 and small drying trays 19. Both inlet pipes 13 and outlet pipes 14 penetrate the tank body 1 and are located on the outside of the tank body 1. A discharge pipe 11 is connected to one side of the bottom of the tank body 1. The discharge pipe 11 is L-shaped. The drive shaft 15 is driven by a motor to rotate, which in turn drives the rake blades 17 to rotate on the large drying tray 18 and the small drying tray 19. The rake blades 17 convey and turn the material on the large drying tray 18 and the small drying tray 19 in an Archimedean spiral trajectory. Thus, the material on the large drying tray 18 is conveyed inward by the rake blades 17 and enters the small drying tray 19 below through the feed hole. Then, the rake blades 17 on the small drying tray 19 move the material to the edge and drop it from the outer edge onto the large drying tray 18 below. Thus, the material flows continuously through the entire tank 1. The dried material is then discharged through the discharge pipe 11 for bagging. When conveying the material, heating medium (saturated steam, hot water, heat transfer oil, and high-temperature molten salt) is conveyed into the large drying tray 18 and the small drying tray 19 through the inlet pipe 13 and then discharged from the outlet pipe 14. Thus, the conveyed material is dried through heat conduction.

[0030] It is worth noting that, see Figure 4 and Figure 6An annular heating plate 5 is installed at the top of the inner cavity of both the large drying tray 18 and the small drying tray 19. A vacuum is established between the annular heating plate 5 and the large and small drying trays 18 and 19. The inlet pipe 13 and outlet pipe 14 are both connected to the annular heating plate 5. Multiple connecting shafts 51 are rotatably connected between the two sides of the inner cavity of the annular heating plate 5. Four baffles 52 are installed on the outer sides of each of the multiple connecting shafts 51. When the heating medium is input, it is introduced into the annular heating plate 5. Because a vacuum is established between the annular heating plate 5 and the large and small drying trays 18 and 19, the heat loss of the heating medium from the bottom and outer sides of the large and small drying trays 18 and 19 is reduced, allowing the heating medium to fully heat the surfaces of the large and small drying trays 18 and 19. Furthermore, the flow of the heating medium pushes the baffles 52 to rotate, effectively preventing the flow speed of the heating medium within the annular heating plate 5, thus ensuring that the heating medium fully heats the surfaces of the large and small drying trays 18 and 19, further improving the drying effect of the material.

[0031] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0032] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A vacuum type tray drier characterized by, include: The collection mechanism includes an air outlet pipe (2) connected to one side of the top of the tank (1), a material removal cylinder (21) connected to the air outlet pipe (2), a cylinder cover (25) connected to the top opening of the material removal cylinder (21) by bolts, an air suction pipe (23) connected to the top of the cylinder cover (25), a negative pressure pump (22) connected to the other end of the air suction pipe (23), and a dust collector bag (26) installed at the end of the cylinder cover (25) away from the air suction pipe (23). The recycling mechanism includes a conduit (24) connected to the bottom of the discharge cylinder (21) and a feed hopper (12) connected to the top of the tank (1) away from the vent pipe (2). The bottom of the conduit (24) is connected to a conveying pipe (3). One end of the conveying pipe (3) is connected to the feed hopper (12). A first drive motor (31) is installed at one end of the conveying pipe (3). A rotating shaft (33) is rotatably connected to the inner cavity of the conveying pipe (3). A spiral blade (32) is installed on the outer side of the rotating shaft (33). The drive end of the first drive motor (31) rotates through the conveying pipe (3) and is connected to the rotating shaft (33) through a coupling.

2. A vacuum type tray drier as claimed in claim 1, wherein, The inner cavity of the tank (1) is provided with a drying mechanism, which includes a drive shaft (15) rotatably connected to the middle of the tank (1). The tank (1) contains multiple large drying discs (18) and small drying discs (19) with hollow structures. The large drying discs (18) and small drying discs (19) are arranged alternately. A discharge hole (110) is opened in the middle of each large drying disc (18). Multiple rake arms (16) are mounted on the outer side of the drive shaft (15). Each of the rake arms (16) is equipped with a rake blade (17). The bottom of the rake blade (17) moves against the surface of the large drying tray (18) and the small drying tray (19). The rake blades (17) on the large drying tray (18) and the small drying tray (19) are in opposite directions. Both ends of the multiple large drying trays (18) and the multiple small drying trays (19) are respectively connected to an inlet pipe (13) and an outlet pipe (14). The inlet pipe (13) and the outlet pipe (14) both penetrate the tank body (1) and are located on the outside of the tank body (1).

3. A vacuum type tray drier as claimed in claim 1 wherein, The recycling mechanism also includes a second drive motor (4) installed on one side of the top of the cylinder cover (25). The drive end of the second drive motor (4) rotates through the cylinder cover (25) and is connected to a gear (41). A bag frame is provided on the inner side of the dust collector bag (26). A toothed ring (45) is fitted on the outer side of the dust collector bag (26). A T-shaped annular groove (42) is opened on the cylinder cover (25). Two T-shaped sliders (43) are slidably connected in the annular groove (42). A connecting rod (44) is connected between the two sliders (43) and the toothed ring (45). The gear (41) meshes with the toothed ring (45). Brush plates (46) are installed on both sides of the bottom of the toothed ring (45), and the bristles on the two brush plates (46) are in contact with the dust collector bag (26).

4. A vacuum type tray drier as claimed in claim 2 wherein, The top of the inner cavity of the large drying tray (18) and the small drying tray (19) are both equipped with an annular heating plate (5). The annular heating plate (5) is in a vacuum setting with the large drying tray (18) and the small drying tray (19). The inlet pipe (13) and the outlet pipe (14) are both connected to the annular heating plate (5).

5. A vacuum type tray drier as claimed in claim 4 wherein, Multiple connecting shafts (51) are rotatably connected between the two sides of the inner cavity of the annular heating plate (5), and four baffles (52) are installed on the outer side of each of the multiple connecting shafts (51).

6. A vacuum type tray drier as claimed in claim 1 wherein, The bottom side of the tank (1) is connected to a discharge pipe (11), and the discharge pipe (11) is L-shaped.

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