Double-drum dryer for preparing modified fly ash soil

Abstract

The utility model aims to provide a double-drum dryer for preparing modified fly ash soil, which comprises an outer wrapping drum, a groove pressing iron sheet, a telescopic shaft, a support table, a water pressing groove, a double-shaft spiral stirrer, a cylindrical steel drum and a hot air pipe, and is characterized in that the outer wrapping drum is mounted on the support table; the left end of the outer wrapping cylinder is sealed through an end wall, and a feeding opening is formed in the end wall. An outlet in the right end of the feeding port is located in the outer wrapping cylinder, and a conveying belt used for conveying materials to the right side is arranged below the right end of the feeding port. A water pressing groove with the left end, the right end and the top face opened is formed in the left end of the inner side of the outer wrapping cylinder, the conveying belt passes through the water pressing groove, and at the moment, the top face of the conveying belt makes contact with the bottom face of the water pressing groove. A water outlet is formed in the position, located below the water pressing groove, of the outer wrapping cylinder. The device overcomes the defects in the prior art, and by arranging the unique scattering device and the water pressing structure, scattering and rapid drying of blocky materials can be effectively achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of drying treatment device for producing modified fly ash soil by mixing wet fertilizer and fly ash, specifically to a double-drum dryer for the preparation of modified fly ash soil. Background Technology

[0002] Soil is an auxiliary component in the production of modified fly ash soil. The drying process can effectively adjust the soil moisture content to optimize subsequent processing. In addition, drying can reduce the weight and volume of the soil, reduce transportation costs, and prevent the soil from becoming moldy or clumping in a humid environment.

[0003] For fly ash, in the process of resource utilization of fly ash in the production of modified fly ash soil, precise control of its moisture content is crucial for improving product quality and ensuring process stability.

[0004] Most dryers on the market currently lack efficient dispersing devices, making it difficult to fully disperse lumpy soil and fly ash. This results in low drying efficiency and a tendency for materials to clump together, failing to meet the demand for rapid drying in actual production. Utility Model Content

[0005] In view of the technical problems existing in the background art, the present invention aims to provide a double-drum dryer for the preparation of modified fly ash soil. By setting a unique dispersing device and water pressure structure, the modified fly ash soil can be pressed, dehydrated and then dispersed to achieve rapid drying of the material, ensure that the material does not clump during the drying process, and improve drying efficiency and drying quality.

[0006] To solve the above problems, the technical solution of this utility model is as follows: A double-cylinder dryer for preparing modified fly ash soil includes an outer cylinder, a pressing iron plate, a telescopic shaft, a support platform, a water pressing trough, a twin-shaft spiral agitator, a cylindrical steel cylinder, and a hot air pipe. The outer cylinder is characterized in that: the outer cylinder is installed on the support platform; the left end of the outer cylinder is sealed by an end wall, and a feeding port is provided on the end wall; the right end outlet of the feeding port is located inside the outer cylinder, and a conveyor belt for transporting materials to the right is provided below it; a water pressing trough with openings at both ends and the top surface is provided on the left side of the inner side of the outer cylinder, and the conveyor belt passes through the water pressing trough, at which point the top surface of the conveyor belt is flush with the bottom surface of the water pressing trough. Contact; the outer casing is located below the pressure tank and has a water outlet. The pressure tank iron sheet is fixed to the telescopic shaft. One end of the telescopic shaft is fixed to the ceiling, and the other end extends into the outer casing and is located above the pressure tank. The dual-shaft spiral mixer and the cylindrical steel cylinder are respectively located inside the outer casing. The material inlet at its left end is connected to the right end of the conveyor belt, and the material outlet at its right end is connected to the inlet of the cylindrical steel cylinder. The outlet at the right end of the cylindrical steel cylinder extends to the outlet at the right end of the outer casing. One end of the hot air pipe extends into the cylindrical steel cylinder from its inlet, and the other end passes through the outer casing and is connected to the hot air source. The connection between the hot air pipe and the cylindrical steel cylinder is provided with a sealing structure.

[0007] One or more fixing straps A are fixedly installed at fixed intervals on the outer wall of the outer casing, and the upper end of the fixing strap A is fixed to the ceiling.

[0008] The bottom plate of the water pressure tank is made of a water-permeable material.

[0009] The cylindrical steel cylinder includes an outer cylindrical steel cylinder, a middle cylindrical steel cylinder, and an inner cylindrical steel cylinder. The outer cylindrical steel cylinder is installed inside the outer casing via a support frame. The middle cylindrical steel cylinder is located inside the outer cylindrical steel cylinder. Corresponding inner ring teeth are provided on the inner sidewall of the middle cylindrical steel cylinder. Corresponding outer ring teeth are provided at both ends of the outer sidewall of the inner cylindrical steel cylinder. A gear roller is provided between the outer and inner ring teeth, meshing with both the outer and inner ring teeth. The rotating shaft at the center of the gear roller is connected to the outer cylindrical steel cylinder via a bracket, allowing the gear roller to rotate based on the rotating shaft. The inner cylindrical steel cylinder... Both ends are sealed by end plates, which have multiple sieve holes. Hot air pipes pass through the end plates and enter the inner cylindrical steel cylinder. The end plate at the left end of the inner cylindrical steel cylinder has an inlet, which is connected to the material outlet of the twin-shaft spiral mixer. The outer cylindrical steel cylinder has a transmission groove, and a motor located inside the outer cylinder is connected to the middle cylindrical steel cylinder via a transmission belt through the transmission groove to drive its rotation. The inner sidewall of the middle cylindrical steel cylinder has a short rake, the end of which is close to the outer sidewall of the inner cylindrical steel cylinder but does not contact it. The inner sidewall of the inner cylindrical steel cylinder has a long rake.

[0010] A fixing patch is provided on the outer side of the rotating shaft at the center of the gear roller.

[0011] The power mechanism is an electric motor, and the transmission mechanism is a belt.

[0012] The dual-shaft spiral mixer includes a shell, stirring shafts, and spiral blades. The upper left side of the shell has a material inlet and a material outlet. The cross-section inside the shell gradually narrows from left to right, forming a funnel-shaped channel. Two sets of stirring shafts are spaced apart and installed in the funnel-shaped channel. One end of each stirring shaft is located directly below the material inlet, and the other end extends to the material outlet. Spiral blades are fixedly wound on each set of stirring shafts.

[0013] The outer cylindrical steel tube is fixedly equipped with one or more fixing straps B at fixed intervals on its outer side wall, and the upper end of the fixing straps B is fixed to the top of the inner side wall of the ceiling outer tube.

[0014] One or more friction strips are spaced apart on the inner wall of the outer cylindrical steel cylinder, and the friction strips are in contact with the outer wall of the middle cylindrical steel cylinder.

[0015] The bottom of the middle cylindrical steel cylinder and the inner cylindrical steel cylinder are respectively provided with discharge ports, and valves are installed at the discharge ports.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model discloses a double-cylinder dryer for preparing modified fly ash soil. It features a telescopic shaft that moves the pressing iron plate downwards to press the material in the water-pressing tank, achieving initial water pressing. A dual-shaft spiral agitator, through the rotation of the agitator shaft and the iron plate fixed to it, thoroughly disperses the material, breaking lumps into smaller particles, thus achieving both dehydration and dispersion functions. The interaction of the middle cylindrical steel cylinder, gear roller, and inner cylindrical steel cylinder further enables continuous tumbling of the material, with long and short rakes continuously dispersing it. Simultaneously, hot air is supplied into the cylinders through hot air pipes, ensuring full contact between the hot air and the material in the inner cylindrical steel cylinder, and further drying by passing the hot air through sieve holes into the material in the middle cylindrical steel cylinder. Small-diameter material particles pass through the sieve holes into the middle cylindrical steel cylinder, while large-diameter particles remain in the inner cylindrical steel cylinder. This invention achieves graded drying of materials with different particle sizes through a double-cylinder structure and sieve design, ensuring the uniformity of drying effect. At the same time, it can realize automated and precise drying, improving drying quality and production efficiency. It effectively solves the problems of low drying efficiency and easy agglomeration of materials in existing dryers, and has high practical value and market promotion prospects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a schematic diagram of the internal structure of the water-pressurizing structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the dispersing device of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the drying device of this utility model.

[0022] The names and numbers of the parts in the diagram are as follows:

[0023] 1 is the feeding port, 2 is the water pressure tank, 3 is the seepage material, 4 is the conveyor belt, 5 is the water outlet, 6 is the twin-shaft spiral mixer, 7 is the support platform, 8 is the fixing belt A, 9 is the pressure groove iron plate, 10 is the telescopic shaft, 11 is the hot air pipe, 12 is the outer cylindrical steel cylinder, 13 is the middle cylindrical steel cylinder, 14 is the inner cylindrical steel cylinder, 15 is the friction strip, 16 is the sieve hole, 17 is the belt, 18 is the gear drum, 19 is the long rake, 20 is the short rake, 21 is the bracket, 22 is the cylindrical steel cylinder, 23 is the end wall, 24 is the outer casing, 25 is the material inlet, 26 is the stirring shaft, 27 is the spiral blade, 28 is the material outlet, 29 is the fixing patch, 30 is the inner ring tooth, 31 is the outer ring tooth, 32 is the end plate, 33 is the transmission groove, 34 is the fixing belt B, 35 is the support frame, and 36 is the shell. Detailed Implementation

[0024] The following description, in conjunction with the accompanying drawings, details the implementation methods and embodiments of this utility model and their working processes.

[0025] Referring to the accompanying drawings, a double-cylinder dryer for preparing modified fly ash soil according to this embodiment includes an outer cylinder 24, a pressure groove iron sheet 9, a telescopic shaft 10, a support platform 7, a water pressure trough 2, a twin-shaft spiral agitator 6, a cylindrical steel cylinder 22, and a hot air pipe 11. The outer cylinder 24 is mounted on the support platform 7; the left end of the outer cylinder 24 is sealed by an end wall 23, and a feeding port 1 is provided on the end wall 23; the right end outlet of the feeding port 1 is located inside the outer cylinder 24, and a conveyor belt 4 for transporting materials to the right is provided below it; a water pressure trough 2 with openings at both ends and the top surface is provided on the left side of the inner side of the outer cylinder 24, and the conveyor belt 4 passes through the water pressure trough 2, at which point the top surface of the conveyor belt 4 contacts the bottom surface of the water pressure trough 2; the outer cylinder 24... The cylinder 24 is located below the water pressure tank 2 and has a water outlet 5. The pressure tank iron plate 9 is fixed to the telescopic shaft 10. One end of the telescopic shaft 10 is fixed to the ceiling, and the other end extends into the outer casing 24 and is located above the water pressure tank 2. The dual-shaft spiral mixer 6 and the cylindrical steel cylinder 22 are respectively located inside the outer casing 24. The material inlet 25 at its left end is connected to the right end of the conveyor belt 4, and the material outlet 28 at its right end is connected to the inlet of the cylindrical steel cylinder 22. The outlet at the right end of the cylindrical steel cylinder 22 extends to the outlet at the right end of the outer casing 24. One end of the hot air pipe 11 extends into the cylindrical steel cylinder 22 from its inlet, and the other end passes through the outer casing 24 and is connected to the hot air source. The connection between the hot air pipe 11 and the cylindrical steel cylinder 22 is provided with a sealing structure.

[0026] One or more fixing straps A8 are fixedly installed at fixed intervals on the outer side wall of the outer casing 24, and the upper end of the fixing straps A8 is fixed to the ceiling.

[0027] The bottom plate of the water pressure tank 2 is made of a water-permeable material 3.

[0028] The cylindrical steel cylinder 22 includes an outer cylindrical steel cylinder 12, a middle cylindrical steel cylinder 13, and an inner cylindrical steel cylinder 14. The outer cylindrical steel cylinder 12 is installed inside the outer casing 24 via a support frame 35. The middle cylindrical steel cylinder 13 is located inside the outer cylindrical steel cylinder 12. The inner sidewall of the middle cylindrical steel cylinder 13 is provided with corresponding inner ring teeth 30. The outer ends of the outer sidewall of the inner cylindrical steel cylinder 14 are respectively provided with outer ring teeth 31 corresponding to the inner ring teeth 30. A gear roller 18 is provided between the outer ring teeth 31 and the inner ring teeth 30, and the gear roller 18 meshes with the outer ring teeth 31 and the inner ring teeth 30 respectively. The rotating shaft at the center of the gear roller 18 is connected to the outer cylindrical steel cylinder 12 via a bracket 21, and the gear roller 18 can rotate based on the rotating shaft. The inner cylindrical steel cylinder 14... Both ends of the steel cylinder 14 are closed by end plates 32. The end plates 32 are provided with multiple sieve holes 16, which, along with the hot air pipe 11, pass through the end plates 32 and enter the inner cylindrical steel cylinder 14. The end plate 32 at the left end of the inner cylindrical steel cylinder 14 is provided with an inlet, which is connected to the material outlet 28 of the twin-shaft spiral stirrer 6. The outer cylindrical steel cylinder 12 is provided with a transmission groove 33. The motor installed in the outer casing 24 is connected to the middle cylindrical steel cylinder 13 via a transmission belt through the transmission groove 33, driving it to rotate. The inner side wall of the middle cylindrical steel cylinder 13 is provided with a short rake 20, the end of which is close to the outer side wall of the inner cylindrical steel cylinder 14 but does not contact the outer side wall. The inner side wall of the inner cylindrical steel cylinder 14 is provided with a long rake 19.

[0029] A fixing patch 29 is provided on the outer side of the rotating shaft at the center of the gear roller 18.

[0030] The power mechanism is an electric motor, and the transmission mechanism is a belt 17.

[0031] The dual-shaft spiral stirrer 6 includes a housing 36, a stirring shaft 26, and spiral blades 27. The housing 36 has a material inlet 25 on the upper left side and a material outlet 28 on the right side. The cross-section of the housing 36 gradually narrows from left to right, forming a funnel-shaped channel. Two sets of stirring shafts 26 are spaced apart and installed in the funnel-shaped channel. One end of the stirring shaft 26 is located directly below the material inlet 25, and the other end extends to the material outlet 28. Spiral blades 27 are fixedly wound on each set of stirring shafts 26.

[0032] The outer cylindrical steel cylinder 12 is fixedly installed with one or more sets of fixing straps B34 at fixed intervals on its outer side wall. The upper end of the fixing straps B34 is fixed to the top of the inner side wall of the ceiling outer casing 24.

[0033] One or more friction strips 15 are spaced apart on the inner wall of the outer cylindrical steel cylinder 12, and the friction strips 15 are in contact with the outer wall of the middle cylindrical steel cylinder 13.

[0034] The bottom of the middle cylindrical steel cylinder 13 and the inner cylindrical steel cylinder 14 are respectively provided with discharge ports, and valves are installed at the discharge ports.

[0035] The working process of this embodiment is as follows:

[0036] Material is fed into the feed inlet 1, falls onto the conveyor belt 4, and is transported to the pressure tank 2. At this time, the control system activates the telescopic shaft 10, which drives the pressure tank iron plate 9 to move downward, pressing the material in the pressure tank 2. The moisture in the material is discharged through the water-permeable material 3 from the outlet 5 at the bottom of the outer casing 24, achieving initial water pressing. The pressed material continues to be transported by the conveyor belt 4 and enters the twin-shaft spiral mixer 6 from the material inlet 25. The mixing shaft 26 of the twin-shaft spiral mixer 6 rotates under the drive of the motor, and the iron plate 27 fixedly wound on the mixing shaft 26 fully disperses the material, breaking the lumpy material into smaller particles. The dispersed material enters the inner cylindrical steel cylinder 14 from the material outlet 28. Then, the electric motor is started, driving the transmission assembly to rotate the middle cylindrical steel cylinder 13 via belt 17. Since the middle cylindrical steel cylinder 13 is in close contact with the gear drum 18, and the middle cylindrical steel cylinder 13 and the inner cylindrical steel cylinder 14 are arranged to rotate in opposite directions, the inner cylindrical steel cylinder 14 rotates in the opposite direction under the action of gear transmission. During the rotation of the two cylinders, the long rakes 19 on the inner wall of the inner cylindrical steel cylinder 14 and the short rakes 20 inside the middle cylindrical steel cylinder 13 continuously agitate and disperse the material. Simultaneously, hot air is supplied into the cylinders through the hot air pipe 11. The hot air makes full contact with the material in the inner cylindrical steel cylinder 14 and can also make full contact with the material in the middle cylindrical steel cylinder 13 through the sieve holes 16, thus drying the material. Small-diameter material particles enter the middle cylindrical steel cylinder 13 through the sieve holes 16, where the short rakes 20 on the inner wall of the middle cylindrical steel cylinder 13 continue to agitate the material, further drying it under the action of hot air. During the drying process, operators can adjust the rotation speed of the middle cylindrical steel cylinder 13 and the inner cylindrical steel cylinder 14, the stirring speed of the twin-shaft spiral agitator 6, and the hot air temperature of the hot air pipe 11 through the control system according to the characteristics of the material and the drying requirements. After the material is dried, the valves at the bottom discharge ports of the middle cylindrical steel cylinder 13 and the inner cylindrical steel cylinder 14 are opened, and the material is discharged from the discharge ports, completing the entire drying process.

Claims

1. A double-cylinder dryer for preparing modified fly ash soil, comprising an outer cylinder (24), a pressing iron plate (9), a telescopic shaft (10), a support platform (7), a water pressing tank (2), a double-shaft spiral agitator (6), a cylindrical steel cylinder (22), and a hot air pipe (11), characterized in that: The outer casing (24) is installed on the support platform (7); the left end of the outer casing (24) is sealed by the end wall (23), and the end wall (23) is provided with a feeding port (1); the right end outlet of the feeding port (1) is located inside the outer casing (24), and a conveyor belt (4) for transporting materials to the right is provided below it; the left end of the inner side of the outer casing (24) is provided with a water pressure trough (2) with openings at both ends and the top surface, and the conveyor belt (4) passes through the water pressure trough (2), at which time the top surface of the conveyor belt (4) contacts the bottom surface of the water pressure trough (2); the outer casing (24) is provided with a water outlet (5) located below the water pressure trough (2), and the pressure trough iron plate (9) is fixed on the telescopic shaft (10), and the telescopic shaft (10) is provided with a water outlet (5) located below the water pressure trough (2). One end of the retractable shaft (10) is fixed to the ceiling, and the other end extends into the outer casing (24) and is located above the pressure tank (2); the dual-shaft spiral mixer (6) and the cylindrical steel cylinder (22) are respectively located in the outer casing (24), the material inlet (25) at its left end is connected to the right end of the conveyor belt (4), and the material outlet (28) at its right end is connected to the inlet of the cylindrical steel cylinder (22); the outlet at the right end of the cylindrical steel cylinder (22) extends to the outlet at the right end of the outer casing (24); one end of the hot air pipe (11) extends into the cylindrical steel cylinder (22) from its inlet, and the other end is connected to the hot air source through the outer casing (24), and a sealing structure is provided at the connection between the hot air pipe (11) and the cylindrical steel cylinder (22).

2. The double-drum dryer for preparing modified fly ash soil according to claim 1, characterized in that: The outer wall of the outer casing (24) is fixedly fitted with one or more sets of fixing straps A (8) at fixed intervals, and the upper end of the fixing straps A (8) is fixed to the ceiling.

3. The double-drum dryer for preparing modified fly ash soil according to claim 1, characterized in that: The bottom plate of the pressure tank (2) is made of a water-permeable material (3).

4. The double-drum dryer for preparing modified fly ash soil according to claim 1, characterized in that: The cylindrical steel cylinder (22) includes an outer cylindrical steel cylinder (12), a middle cylindrical steel cylinder (13), and an inner cylindrical steel cylinder (14). The outer cylindrical steel cylinder (12) is installed inside the outer casing (24) via a support frame (35). The middle cylindrical steel cylinder (13) is provided inside the outer cylindrical steel cylinder (12). The inner sidewall of the middle cylindrical steel cylinder (13) is provided with corresponding inner ring teeth (30). The outer ends of the outer sidewall of the inner cylindrical steel cylinder (14) are respectively provided with outer ring teeth (31) corresponding to the inner ring teeth (30). A gear roller (18) is provided between the outer ring teeth (31) and the inner ring teeth (30). The gear roller (18) meshes with the outer ring teeth (31) and the inner ring teeth (30) respectively. The rotating shaft at the center of the gear roller (18) is connected to the outer cylindrical steel cylinder (12) via a bracket (21). The gear roller (18) can rotate based on the rotating shaft. The inner cylindrical steel cylinder (14) is closed at both ends by end plates (32). The end plates (32) are provided with multiple sieve holes (16), and the hot air pipe (11) passes through the end plates (32) and enters the inner cylindrical steel cylinder (14). The end plate (32) at the left end of the inner cylindrical steel cylinder (14) is provided with an inlet, which is connected to the material outlet (28) of the twin-shaft spiral stirrer (6). The outer cylindrical steel cylinder (12) is provided with a transmission groove (33). The motor installed in the outer casing (24) is connected to the middle cylindrical steel cylinder (13) via a transmission belt through the transmission groove (33) to drive it to rotate. The inner wall of the middle cylindrical steel cylinder (13) is provided with a short rake (20), the end of which is close to the outer wall of the inner cylindrical steel cylinder (14) and does not contact the outer wall; the inner wall of the inner cylindrical steel cylinder (14) is provided with a long rake (19).

5. The double-drum dryer for preparing modified fly ash soil according to claim 4, characterized in that: A fixing patch (29) is provided on the outer side of the rotating shaft at the center of the gear roller (18).

6. The double-drum dryer for preparing modified fly ash soil according to claim 1, characterized in that: The dual-shaft spiral stirrer (6) includes a shell (36), a stirring shaft (26), and spiral blades (27). The upper left side of the shell (36) has a material inlet (25) and a material outlet (28) at the right end. The cross-section inside the shell (36) gradually narrows from left to right, forming a funnel-shaped channel. Two sets of stirring shafts (26) are spaced apart and installed in the funnel-shaped channel. One end of the stirring shaft (26) is located directly below the material inlet (25), and the other end extends to the material outlet (28). Spiral blades (27) are fixedly wound on each set of stirring shafts (26).

7. The double-drum dryer for preparing modified fly ash soil according to claim 4, characterized in that: The outer cylindrical steel tube (12) is fixedly installed with one or more fixing straps B (34) at fixed intervals on the outer side wall. The upper end of the fixing straps B (34) is fixed to the top of the inner side wall of the ceiling outer tube (24).

8. The double-drum dryer for preparing modified fly ash soil according to claim 4, characterized in that: One or more friction strips (15) are spaced apart on the inner wall of the outer cylindrical steel cylinder (12), and the friction strips (15) are in contact with the outer wall of the middle cylindrical steel cylinder (13).

9. The double-drum dryer for preparing modified fly ash soil according to claim 4, characterized in that: The bottom of the middle cylindrical steel cylinder (13) and the inner cylindrical steel cylinder (14) are respectively provided with discharge ports, and valves are installed at the discharge ports.

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