Bentonite drying equipment

Abstract

The utility model relates to bentonite drying equipment, which is used for solving the technical problem of low drying efficiency in a single natural air drying mode by only increasing the contact area between bentonite and air in actual use of some bentonite drying equipment mentioned in the background technology. Comprising a scattering chamber, the scattering chamber is used for scattering caked bentonite, the lower portion of the scattering chamber is communicated with a belt conveyor, the belt conveyor is used for conveying the bentonite and comprises an annular conveying belt, a heating pipe is installed in the belt conveyor, the heating pipe is close to the two opposite sides of the conveying belt, and the heating pipe is connected with the belt conveyor. A spray head used for blowing out hot air is installed above the conveying belt.

Description

Technical Field

[0001] The utility model relates to the technical field of bentonite drying, in particular to bentonite drying equipment. Background Art

[0002] Bentonite is a non-metallic mineral with montmorillonite as its main mineral component. Since the layered structure formed by the montmorillonite unit cell contains certain cations, such as Cu2+, Mg2+, Na+, K+, etc., and these cations are very unstable in their interaction with the montmorillonite unit cell and are easily exchanged by other cations, it has good ion exchangeability. However, bentonite is easily affected by moisture and agglomerates, so a special drying device is required during the production process.

[0003] Prior art, such as the utility model patent document with authorization announcement number "CN215952105U" and patent name "A bentonite hot air drying device", discloses a drying device, which includes a drying box, an exhaust fan is provided above the drying box, the air inlet end of the exhaust fan is connected to the top of the drying box through a pipeline, a motor is provided at the bottom of the drying box, the shaft end of the motor faces upward and is connected to a connecting shaft, a placement shell is provided inside the top of the drying box, the upper end of the placement shell has no cover and the bottom is a breathable membrane structure, the upper end of the connecting shaft passes through the placement shell and connecting plates are provided on both sides, and a brush is provided under the connecting plate.

[0004] However, in actual use, the above patent puts bentonite into the placement shell through the discharge door, and then drives the connecting plate and the brush to rotate to disperse the bentonite. This method of breaking up the bentonite to accelerate the evaporation of water only increases the contact area between the bentonite and the air. This single natural air drying method has low drying efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a bentonite drying device for solving the technical problem that some bentonite drying devices mentioned in the background technology, when actually used, only increase the contact area between bentonite and air and use a single natural air drying method with low drying efficiency.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A bentonite drying device comprises a dispersing chamber, the dispersing chamber is used to disperse agglomerated bentonite, a belt conveyor is connected below the dispersing chamber, the belt conveyor is used to transport bentonite, the belt conveyor comprises an annular conveyor belt, a heating pipe is installed inside the belt conveyor, the heating pipe is close to two opposite sides of the conveyor belt, and a nozzle for blowing out hot air is installed above the conveyor belt;

[0008] Two squeezing rollers are rotatably connected in the dispersing chamber, a first motor is fixedly connected to the side wall of the dispersing chamber, an output end of the first motor is connected to a first rotating shaft parallel to the length direction of the dispersing chamber, the first rotating shaft is rotatably passed through the side wall of the dispersing chamber, one of the squeezing rollers is fixedly sleeved on the first rotating shaft, a mounting shaft parallel to the first rotating shaft is also rotatably passed through the side wall of the dispersing chamber, another squeezing roller is fixedly sleeved on the mounting shaft, one end of the first rotating shaft and the mounting shaft passing through the dispersing chamber are both fixedly sleeved with gears, and also include an annular rack sleeved on the two gears, and the two gears are meshed with the rack;

[0009] An arc-shaped vibration plate is vertically slidably connected in the dispersing chamber, two mounting blocks are fixedly connected to both sides of the dispersing chamber, vertical slide grooves are opened at both ends of the vibration plate, and the two mounting blocks are arranged in the two slide grooves. A second motor is fixedly connected to the side wall of the dispersing chamber, and a second rotating shaft is connected to the output end of the second motor. A cam is fixedly sleeved on the second rotating shaft, and when the second rotating shaft rotates, the cam intermittently abuts against the side of the vibration plate away from the extrusion roller.

[0010] Working principle:

[0011] When in use, the bentonite is poured into the breaking-up chamber to break up the agglomerated bentonite;

[0012] Then the bentonite that has been broken up is placed on a belt conveyor, which drives the bentonite to move. While the belt conveyor is transporting the bentonite, the heating pipe dries the bentonite on the conveyor belt. At this time, the hot air sprayed from the nozzle dries the bentonite from top to bottom. Finally, the dried bentonite is collected by the staff.

[0013] Beneficial effects:

[0014] By setting up a breaking chamber, the agglomerated bentonite can be broken up, thereby increasing the contact area between the bentonite and the air, accelerating the evaporation rate of the water in the bentonite, and improving the drying efficiency;

[0015] A belt conveyor, a heating pipe and a nozzle are provided. The belt conveyor is used to transport bentonite. While transporting the bentonite, the heating pipe dries the bentonite on the conveyor belt. The nozzle above the conveyor belt further dries the bentonite from top to bottom by ejecting hot air. By double drying the upper and lower surfaces of the bentonite and cooperating with the breaking effect of the breaking chamber, the evaporation rate of water on the surface of the bentonite is further accelerated, and the drying effect is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the central disintegration chamber from above;

[0018] Figure 3 An enlarged assembly diagram of the lower air inlet pipe, heating pipe, circular hole, bearing, rotating cylinder, cavity, air outlet and opening.

[0019] In the above drawings: beating chamber 1, heating cover 2, belt conveyor 3, mounting shaft 4, extrusion roller 5, chute 6, first rotating shaft 7, vibration plate 8, mounting block 9, second rotating shaft 10, cam 11, second motor 12, first motor 13, baffle 14, feed barrel 15, bridging plate 16, discharge port 17, third motor 18, third rotating shaft 19, slide bar 20, hot air box 21, nozzle 22, hot air blower 23, first air pipe 24, conveyor belt 25, lower air inlet pipe 26, heating pipe 27, second air pipe 28, telescopic pipe 29, rack 30, support rod 31, first fixed column 32, support column 33, circular hole 34, bearing 35, rotating barrel 36, gear 37, cavity 38, air outlet 39, opening 40, upper air inlet pipe 41. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Example:

[0022] like Figure 1 As shown, a bentonite drying equipment includes a dispersing chamber 1 and a support column 33. The dispersing chamber 1 is fixedly mounted on the top of the support column 33. The dispersing chamber 1 is used to disperse the agglomerated bentonite. A belt conveyor 3 is connected below the dispersing chamber 1. The belt conveyor 3 is used to transport bentonite. The belt conveyor 3 includes an annular conveyor belt 25. A heating pipe 27 is installed in the belt conveyor 3. The heating pipe 27 is close to the opposite sides of the conveyor belt 25. A nozzle 22 for blowing out hot air is installed above the conveyor belt 25.

[0023] By setting up a breaking-up chamber 1, the agglomerated bentonite can be broken up, thereby increasing the contact area between the bentonite and the air, accelerating the evaporation rate of water in the bentonite, and improving the drying efficiency; by setting up a belt conveyor 3, a heating pipe 27 and a nozzle 22, the belt conveyor 3 is used to transport the bentonite, and while transporting the bentonite, the heating pipe 27 dries the bentonite on the conveyor belt 25; the nozzle 22 above the conveyor belt 25 further dries the bentonite from top to bottom by ejecting hot air, and by the double drying method of the upper and lower surfaces of the bentonite, in combination with the breaking-up effect of the breaking-up chamber 1, the evaporation rate of water on the surface of the bentonite is further accelerated, and the drying effect is further improved.

[0024] like Figure 1and Figure 2 As shown, two squeezing rollers 5 are rotatably connected in the dispersing chamber 1, a first motor 13 is fixedly connected to the side wall of the dispersing chamber 1, an output end of the first motor 13 is connected to a first rotating shaft 7 parallel to the length direction of the dispersing chamber 1, the first rotating shaft 7 rotatably passes through the side wall of the dispersing chamber 1, the other end of the first rotating shaft 7 is rotatably arranged on the inner wall of the dispersing chamber 1, one of the squeezing rollers 5 is fixedly sleeved on the first rotating shaft 7, the side wall of the dispersing chamber 1 is also rotatably penetrated by a mounting shaft 4 parallel to the first rotating shaft 7, the other end of the mounting shaft 4 is rotatably arranged on the inner wall of the dispersing chamber 1, the other squeezing roller 5 is fixedly sleeved on the mounting shaft 4, one end of the first rotating shaft 7 and the mounting shaft 4 passing through the dispersing chamber 1 are both fixedly sleeved with a gear 37, and also include an annular rack 30 sleeved on the two gears 37, the two gears 37 are both meshed with the rack 30. By providing two squeezing rollers 5 , a first motor 13 , a first rotating shaft 7 , a mounting shaft 4 , a gear 37 and a rack 30 , starting the first motor 13 simultaneously drives the two squeezing rollers 5 to rotate, and this method improves the resource utilization rate of the first motor 13 .

[0025] like Figure 1 and Figure 2 As shown, an arc-shaped vibration plate 8 is vertically slidably connected in the dispersing chamber 1, two mounting blocks 9 are fixedly connected on both sides of the dispersing chamber 1, vertical slide grooves 6 are opened at both ends of the vibration plate 8, and the two mounting blocks 9 are arranged in the two slide grooves 6. A second motor 12 is fixedly connected to the side wall of the dispersing chamber 1, and a second rotating shaft 10 is connected to the output end of the second motor 12. The second rotating shaft 10 rotates and passes through the side wall of the dispersing chamber 1. A cam 11 is fixedly sleeved on the second rotating shaft 10 arranged in the dispersing chamber 1. When the second rotating shaft 10 rotates, the cam 11 intermittently abuts against the side of the vibration plate 8 away from the extrusion roller 5.

[0026] By setting the vibration plate 8, two mounting blocks 9, the slide 6, the second motor 12, the second rotating shaft 10 and the cam 11, the second motor 12 is started, and the second motor 12 drives the vibration plate 8 to vibrate vertically, thereby oscillating the bentonite passing between the two squeezing rollers 5, further breaking up the bentonite; and driving the bentonite to flow out of the breaking up chamber 1 along the arc-shaped vibration plate 8, so as to prevent the bentonite from accumulating on the vibration plate 8.

[0027] like Figure 1As shown, a discharge port 17 is opened at the lower part of the dispersing chamber 1 on the side facing the belt conveyor 3, wherein a mounting block 9 is fixed on the inner wall of the discharge port 17, and a slat 16 inclined toward the belt conveyor 3 is fixedly connected to the dispersing chamber 1 below the discharge port 17, and a funnel-shaped feed barrel 15 with a wide top and a narrow bottom is fixedly connected to the discharge port 17, and a baffle 14 is fixedly provided on the dispersing chamber 1, and the other end of the baffle 14 is fixedly connected to the feed barrel 15, and the feed barrel 1 5 is used to circulate the bentonite vibrated from the vibration plate 8, and then guide the bentonite to flow evenly to the strap 16, while the baffle 14 can prevent the vibrated bentonite from scattering. The opening of the feed barrel 15 corresponds to the discharge port 17. The bottom of the feed barrel 15 is provided with an opening toward the strap 16. The strap 16 is located above the conveyor belt 25. The bentonite in the scattering chamber 1 passes through the feed barrel 15 and the strap 16 in turn and then falls onto the belt conveyor 3.

[0028] By providing the discharge port 17, the strap 16 and the feed barrel 15, the bentonite can be more automatically passed through the feed barrel 15 and the strap 16 in sequence and then fall onto the belt conveyor 3, and the bentonite is not easy to accumulate in the breaking chamber 1. Furthermore, the bentonite can flow evenly through the strap 16 to the belt conveyor 3, preventing the bentonite from being unevenly distributed on the belt conveyor 3, causing the bentonite to accumulate, and reducing the contact area between the bentonite and the air.

[0029] like Figure 1 and Figure 3 As shown, a group of first fixed columns 32 are respectively provided on both sides of the belt conveyor 3, and the number of first fixed columns 32 in each group is two. A horizontal upper air inlet pipe 41 and a horizontal lower air inlet pipe 26 are provided between the two first fixed columns 32 in the same group, and the length directions of the upper air inlet pipe 41 and the lower air inlet pipe 26 are the same as the transportation direction of bentonite on the belt conveyor 3. A row of circular holes 34 are opened on the upper air inlet pipe 41 and the lower air inlet pipe 26 along the length direction thereof, and a bearing 35 is fixedly connected in each of the circular holes 34. A bearing 35 is installed between the two upper air inlet pipes 41 and between the two lower air inlet pipes 26. A rotating cylinder 36 is provided which is distributed in the same manner as the circular holes 34, and both ends of each rotating cylinder 36 are respectively fixedly connected to the inner walls of each bearing 35 on both sides, and each heating tube 27 is sleeved on each rotating cylinder 36 in a one-to-one manner, and each rotating cylinder 36 has a side wall with an opening 40, and each heating tube 27 has a cavity 38, and the opening 40 is conductively connected to the cavity 38; it also includes a hot air blower 23, and the output end of the hot air blower 23 is connected to a first air supply pipe 24, and the first air supply pipe 24 is conductively connected to two upper air inlet pipes 41 and a lower air inlet pipe 26 on the same side, and each heating tube 27 has an air outlet hole 39.

[0030] By setting the first fixed column 32, the upper air inlet pipe 41, the lower air inlet pipe 26, the circular hole 34, the bearing 35, the rotating cylinder 36, the opening 40, the cavity 38, the hot air blower 23, the first air supply pipe 24 and the air outlet 39, the hot air blower 23 is started, and the hot air is conducted to the heating pipe 27. After the heating pipe 27 is heated, the heat is transferred to the conveyor belt 25, so as to dry the bentonite placed on the conveyor belt and accelerate the evaporation rate of the water in the bentonite; when the bentonite is placed on the conveyor belt 25 and the conveyor belt 25 contacts the heating pipe 27, the heating pipe 27 can also rotate with the movement of the conveyor belt 25, so as to prevent the outer wall of the heating pipe 27 from being damaged by static friction due to the contact between the conveyor belt 25 and the heating pipe 27.

[0031] like Figure 1 As shown, a support rod 31 is fixedly provided on the beating chamber 1, and a heating hood 2 with an opening facing downward is fixedly provided on the other end of the support rod 31, and the belt conveyor 3 is arranged below the heating hood 2, and a third motor 18 is fixedly connected to the top of the heating hood 2, and the output end of the third motor 18 is connected to a third rotating shaft 19 vertically downward, and the third rotating shaft 19 is rotatably penetrated through one side wall of the heating hood 2, and a sliding rod 20 parallel to the third rotating shaft 19 is also fixed in the other side wall of the heating hood 2, and a hot air box 21 is vertically slidably connected in the heating hood 2, and both ends of the hot air box 21 are sleeved on the third rotating shaft 19 and the sliding rod 20, and the end of the hot air box 21 is threadedly connected to the third rotating shaft 19, the nozzle 22 is conductively connected to the hot air box 21, and the nozzle 22 faces the conveyor belt 25, and the output end of the hot air blower 23 is also conductively connected to a second air supply pipe 28, and the second air supply pipe 28 is conductively connected to the hot air box 21.

[0032] By arranging the support rod 31, the heating cover 2, the third motor 18, the third rotating shaft 19, the sliding rod 20, the hot air box 21 and the second air delivery pipe 28, starting the third motor 18 and the hot air blower 23, and adjusting the vertical position of the hot air box 21, the volume of the hot air can be adjusted. Figure 1 As shown, the second air delivery pipe 28 is divided into two sections, an upper section and an lower section, and a telescopic pipe 29 is connected between the two sections. By setting the telescopic pipe 29, the telescopic pipe 29 cooperates with the hot air box 21 to adjust its vertical position.

[0033] Working principle:

[0034] When in use, the bentonite is poured into the breaking up chamber 1, and then the first motor 13 is started, the output end of the first motor 13 drives the first rotating shaft 7 to rotate, the rotation of the first rotating shaft 7 drives the squeezing roller 5 connected to the first rotating shaft 7 to rotate, the rotation of the first rotating shaft 7 also drives the gear 37 connected to the first rotating shaft 7 to rotate, the rotation of the gear 37 drives the rack 30 to rotate, the rotation of the rack 30 drives another gear 37 to rotate, the rotation of the other gear 37 drives the installation shaft 4 to rotate, the rotation of the installation shaft 4 drives another squeezing roller 5 to rotate, so that the two squeezing rollers 5 rotate at the same time to extrude and break up the agglomerated bentonite;

[0035] Then, the bentonite after the dispersion treatment falls onto the vibration plate 8 through the two squeezing rollers 5. At this time, the second motor 12 is started, and the output end of the second motor 12 drives the second rotating shaft 10 to rotate. The rotation of the second rotating shaft 10 drives the cam 11 to rotate, and the rotation of the cam 11 will intermittently abut against the side of the vibration plate 8 away from the squeezing roller 5. Due to the existence of the two chutes 6, the vibration plate 8 vibrates vertically in the dispersion chamber 1, thereby oscillating the bentonite.

[0036] Under the vibration of the vibration plate 8, the bentonite is vibrated out of the disintegration chamber 1 and enters the feeding tube 15 through the discharge port 17. The bentonite in the feeding tube 15 flows evenly toward the slats 16, and then falls evenly onto the belt conveyor 3 along the inclined slats 16. The belt conveyor 3 drives the bentonite to move.

[0037] At this time, the hot air blower 23 is started, and the hot air outputted from the output end of the hot air blower 23 enters the hot air box 21 through the second air delivery pipe 28, and then is sprayed toward the bentonite on the conveyor belt 25 through the nozzle 22; the third motor 18 is started, and the output end of the third motor 18 drives the third rotating shaft 19 to rotate, and the rotation of the third rotating shaft 19 drives the hot air box 21 to slide vertically on the first rotating shaft 7 and the slide bar 20, and the air volume of the hot air blown toward the conveyor belt 25 is adjusted; the hot air sprayed from the nozzle 22 dries the bentonite from top to bottom;

[0038] At the same time, the hot air output from the output end of the hot air blower 23 also enters the upper air inlet pipe 41 and the lower air inlet pipe 26 through the first air supply pipe 24, and then enters each rotating cylinder 36. The hot air entering the rotating cylinder 36 enters the heating tube 27 through the opening 40, thereby heating the heating tube 27. After the heating tube 27 is heated, the heat is transferred to the conveyor belt 25, thereby drying the bentonite placed on the conveyor belt 25. Finally, the dried bentonite is collected uniformly by the staff, and the entire operation is completed.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A bentonite drying device, characterized in that: The invention comprises a dispersing chamber (1), wherein the dispersing chamber (1) is used to disperse agglomerated bentonite, wherein a belt conveyor (3) is connected below the dispersing chamber (1), wherein the belt conveyor (3) is used to transport bentonite, wherein the belt conveyor (3) comprises an annular conveyor belt (25), wherein a heating pipe (27) is installed inside the belt conveyor (3), wherein the heating pipe (27) is close to two opposite sides of the conveyor belt (25), and a nozzle (22) for blowing out hot air is installed above the conveyor belt; Two squeezing rollers (5) are rotatably connected in the dispersing chamber (1), a first motor (13) is fixedly connected to the side wall of the dispersing chamber (1), an output end of the first motor (13) is connected to a first rotating shaft (7) parallel to the length direction of the dispersing chamber (1), the first rotating shaft (7) is rotatably passed through the side wall of the dispersing chamber (1), one of the squeezing rollers (5) is fixedly sleeved on the first rotating shaft (7), the side wall of the dispersing chamber (1) is also rotatably passed through a mounting shaft (4) parallel to the first rotating shaft (7), the other squeezing roller (5) is fixedly sleeved on the mounting shaft (4), one end of the first rotating shaft (7) and the mounting shaft (4) passing through the dispersing chamber (1) are both fixedly sleeved with a gear (37), and also include an annular rack (30) sleeved on the two gears (37), the two gears (37) are both meshed with the rack (30); An arc-shaped vibration plate (8) is vertically slidably connected in the dispersing chamber (1), two mounting blocks (9) are fixedly connected to both sides of the dispersing chamber (1), vertical slide grooves (6) are opened at both ends of the vibration plate (8), and the two mounting blocks (9) are arranged in the two slide grooves (6). A second motor (12) is fixedly connected to the side wall of the dispersing chamber (1), and a second rotating shaft (10) is connected to the output end of the second motor (12). A cam (11) is fixedly sleeved on the second rotating shaft (10). When the second rotating shaft (10) rotates, the cam (11) intermittently abuts against a side of the vibration plate (8) away from the squeezing roller (5).

2. A bentonite drying device according to claim 1, characterized in that: A discharge port (17) is formed on the lower part of the dispersing chamber (1) on the side facing the belt conveyor (3), wherein a mounting block (9) is fixed on the inner wall of the discharge port (17), and a slat (16) inclined toward the belt conveyor (3) is fixedly connected to the dispersing chamber (1) below the discharge port (17), and a funnel-shaped feed barrel (15) having a wide top and a narrow bottom is fixedly connected to the discharge port (17). The feed barrel (15) is used to circulate the particles from the vibrating The bentonite vibrated out from the moving plate (8) is then guided to flow evenly toward the strap plate (16). The opening of the feed barrel (15) corresponds to the discharge port (17). The bottom of the feed barrel (15) is provided with an opening toward the strap plate (16). The strap plate (16) is located above the conveyor belt (25). The bentonite in the breaking up chamber (1) passes through the feed barrel (15) and the strap plate (16) in sequence and then falls onto the belt conveyor (3).

3. A bentonite drying device according to claim 1, characterized in that: A group of first fixed columns (32) are respectively provided on both sides of the belt conveyor (3), and each group of first fixed columns (32) has two first fixed columns. A horizontal upper air intake pipe (41) and a horizontal lower air intake pipe (26) are provided between the two first fixed columns (32) in the same group, and the length directions of the upper air intake pipe (41) and the lower air intake pipe (26) are the same as the transportation direction of bentonite on the belt conveyor (3). A row of circular holes (34) are provided on the upper air intake pipe (41) and the lower air intake pipe (26) along the length direction thereof, and a bearing (35) is fixedly connected in each of the circular holes (34). A bearing (35) is installed between the two upper air intake pipes (41) and between the two lower air intake pipes (26). (34) uniformly distributed rotating cylinders (36), the two ends of each rotating cylinder (36) are respectively fixed to the inner wall of each bearing (35) on both sides, each heating tube (27) is sleeved on each rotating cylinder (36) in a one-to-one correspondence, each rotating cylinder (36) side wall is provided with an opening (40), each heating tube (27) is provided with a cavity (38), and the opening (40) is conductively connected to the cavity (38); it also includes a hot air blower (23), the output end of the hot air blower (23) is connected to a first air supply pipe (24), the first air supply pipe (24) is conductively connected to two upper air inlet pipes (41) and a lower air inlet pipe (26) on the same side, and each heating tube (27) is provided with an air outlet hole (39).

4. A bentonite drying device according to claim 3, characterized in that: The beating chamber (1) is fixedly provided with a support rod (31), the other end of the support rod (31) is fixedly provided with a heating cover (2) with an opening facing downwards, the belt conveyor (3) is arranged below the heating cover (2), the top of the heating cover (2) is fixedly connected with a third motor (18), the output end of the third motor (18) is connected with a third rotating shaft (19) vertically downwards, the third rotating shaft (19) is rotatably penetrated through one side wall of the heating cover (2), and the other side wall of the heating cover (2) is also fixedly provided with a third rotating shaft (19) parallel to the third rotating shaft (19). The heating cover (2) is vertically slidably connected to a hot air box (21), the two ends of the hot air box (21) are sleeved on the third rotating shaft (19) and the sliding rod (20), the end of the hot air box (21) is threadedly connected to the third rotating shaft (19), the nozzle (22) is conductively connected to the hot air box (21), and the nozzle (22) faces the conveyor belt (25), and the output end of the hot air blower (23) is also conductively connected to a second air supply pipe (28), and the second air supply pipe (28) is conductively connected to the hot air box (21).

5. A bentonite drying device according to claim 4, characterized in that: The second gas delivery pipe (28) is divided into two sections, an upper section and a lower section, and a telescopic pipe (29) is connected between the two sections.

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