Kitchen waste drying device

Abstract

The application relates to a kitchen waste drying device and relates to the technical field of kitchen waste treatment. The kitchen waste drying device comprises a base, a drying cylinder is fixedly arranged at the top of the base, a rotating shaft is rotatably arranged on the inner wall of the drying cylinder, and a plurality of circumferential conveying assemblies are arranged on the outer wall of the rotating shaft in the axial direction. The circumferential conveying assembly comprises a plurality of storage boxes which are arranged in the circumferential direction of the rotating shaft and are fixedly connected with the rotating shaft. The top of each storage box is provided with an opening and is in frictional contact with the inner wall of the drying cylinder. One of the side walls of each storage box is provided with a material port. An arc-shaped pressing plate is slidably arranged on the inner wall of each storage box. In the process of circular rotation of the storage boxes, when the storage boxes rotate through the lower region of the drying cylinder, the arc-shaped pressing plate is located at the innermost side of the storage box, the internal space of the storage box is increased, and materials are discharged through the material port and then enter. When the storage boxes rotate through other regions of the drying cylinder, the arc-shaped pressing plate slides outward and extrudes the materials in the storage box, and the materials are in contact with the inner wall of the drying cylinder to exchange heat. The application solves the problem of low utilization rate of the heat exchange wall surface of the existing kitchen waste drying equipment.

Description

Technical Field

[0001] This invention relates to the field of food waste treatment technology, specifically a food waste drying device. Background Technology

[0002] Food waste refers to organic waste such as food scraps, waste oil, fruit peels and vegetable leaves, and leftover food generated in daily life, catering services, and food processing. It has a complex composition and is characterized by high water content, rich oil content, and high salt content, making it extremely prone to rapid decomposition and strong odor at room temperature. To achieve harmless treatment, the collected food waste is usually first pre-crushed to uniformly distribute the particle size, and then sent to drying equipment for high-temperature drying to effectively reduce moisture content and volume, facilitating subsequent deep processing according to resource utilization directions (such as anaerobic fermentation to produce biogas, feed conversion, or incineration).

[0003] Existing kitchen waste drying equipment has gradually revealed its shortcomings during use, mainly in the following aspects: Low utilization rate of heat exchange wall surface. Specifically, during the drying process of kitchen waste, steam enters the annular space inside the drum and indirectly heats the material through the inner wall. At the same time, the rotating blades inside the drum continuously stir the material, allowing the kitchen waste to come into contact with the inner wall of the drum for heat exchange to achieve drying. However, since the material filling rate inside the drum is usually only maintained between 25% and 35%, most of the inner wall area cannot come into contact with the kitchen waste. The actual wall surface area participating in heat exchange is limited, resulting in low utilization rate of heat exchange wall surface, which directly affects drying efficiency and heat consumption costs.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a kitchen waste drying device. In the process of drying kitchen waste, the kitchen waste can fully contact the inner wall of the cylinder, the actual wall area participating in heat exchange is effectively increased, the utilization rate of the heat exchange wall surface is significantly improved, and the heat transfer effect per unit time is enhanced. While improving drying efficiency, the heat consumption cost is effectively reduced.

[0006] To address the above problems, the present invention provides the following technical solution: A kitchen waste drying device includes a base, a drying cylinder is fixedly mounted on the top of the base, a rotating shaft is rotatably mounted on the inner wall of the drying cylinder, and a plurality of circumferential conveying components are provided on the outer wall of the rotating shaft along the axial direction. The circumferential conveying assembly includes several storage bins arranged circumferentially along the rotating shaft. The storage bins are fixedly connected to the rotating shaft. The top of each storage bin is open and in frictional contact with the inner wall of the drying cylinder. One side wall of each storage bin has a material inlet. An arc-shaped pressure plate is slidably mounted on the inner wall of the storage bin. During the cyclic rotation of the storage bin, when the storage bin passes through the lower area of ​​the drying cylinder, the arc-shaped pressure plate is located at the innermost side of the storage bin, increasing the internal space of the storage bin. Material is discharged first and then enters through the material inlet. When the storage bin passes through other areas of the drying cylinder, the arc-shaped pressure plate slides outward and squeezes the material in the storage bin, allowing the material to contact the inner wall of the drying cylinder for heat exchange.

[0007] As an optimized solution, the outer wall of the rotating shaft is provided with several spiral scrapers that rub against the inner wall of the drying cylinder. The spiral scrapers and the storage box are arranged alternately along the circumference, and the spiral scrapers are fixedly connected to the rotating shaft by a fixing rod.

[0008] As an optimized solution, a guide rod is provided between the storage box and the rotating shaft. Several sliding rods are fixedly provided on the outer wall of the guide rod. The sliding rods pass through the storage box and are fixedly connected to the arc-shaped pressure plate. The sliding rods are slidably connected to the storage box. Several arc-shaped disks are fixedly provided inside the drying cylinder. Both ends of the arc-shaped disks are provided with guide grooves. Both ends of the guide rod are located in the guide grooves.

[0009] As an optimized solution, the guide groove consists of a compression section and a holding section. The radius of the compression section increases clockwise, while the radius of the holding section remains constant. The arc-shaped disk and the rotating shaft avoid each other, and the arc-shaped disk is fixedly connected to the drying cylinder through a connecting plate.

[0010] As an optimized solution, the storage box is fixedly provided with several fixed cylinders, the sliding rod passes through the fixed cylinders and is slidably connected to them, the outer wall of the sliding rod is fitted with a top plate and a compression spring inside the fixed cylinder, the top plate is fixedly connected to the sliding rod, and the two ends of the compression spring abut against the top plate and the storage box respectively.

[0011] As an optimized solution, the storage box is fixedly connected to the rotating shaft via a connecting rod, and a clearance groove is provided through the connecting rod, with the guide rod located within the clearance groove.

[0012] As an optimized solution, the drying cylinder is provided with an annular air duct, the annular air duct is provided with a baffle, and the outer wall of the drying cylinder is provided with an air inlet pipe and an exhaust pipe on both sides of the baffle, and the air inlet pipe and the exhaust pipe are connected to an external steam supply system.

[0013] As an optimized solution, the lower outer wall of the drying cylinder is provided with a drain valve that communicates with the annular air duct.

[0014] As an optimized solution, the drying cylinder is provided with a feed pipe and a discharge pipe at both ends, and the discharge pipe is provided with a detachable sealing plate.

[0015] As an optimized solution, the base is provided with a drive mechanism at the top, and one end of the rotating shaft extends outside the drying cylinder and is connected to the drive mechanism.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. Steam enters the annular air duct through the inlet pipe and exits through the exhaust pipe, thereby heating the inner wall of the drying drum. The material contacts the lower inner wall of the drying drum for heat exchange. The rotating shaft drives the storage box to rotate cyclically. When the storage box passes through the lower area of ​​the drying drum, the guide rod separates from the arc-shaped plate, and the guide rod is released from its restraint. With the cooperation of the compression spring, the arc-shaped pressure plate is located at the innermost side of the storage box. Therefore, in the initial stage when the storage box enters the lower area of ​​the drying drum, the arc-shaped pressure plate slides to the innermost side, the material in the storage box is depressurized, and under the action of gravity, it falls through the material outlet to the lower part of the drying drum to complete the discharge. The storage box continues to rotate and enters the lower part of the drying drum. The material enters the storage box through the material outlet to complete the feeding. When the storage box passes through other areas of the drying drum... The guide rod first enters the compression section and pushes the arc-shaped pressure plate outward to squeeze the material in the storage box. Then the guide rod enters the holding section, where the arc-shaped pressure plate maintains the final squeezed state on the material. This squeezing not only improves the contact effect between the material and the inner wall of the drying cylinder, but also prevents the material from falling out of the storage box prematurely during downward movement. When the material in the storage box is conveyed circumferentially, it contacts the inner wall of the drying cylinder for heat exchange. In the process of drying kitchen waste, the kitchen waste can fully contact the inner wall of the cylinder, effectively increasing the actual wall area participating in heat exchange and significantly improving the utilization rate of the heat exchange wall, thereby enhancing the heat transfer effect per unit time. While improving drying efficiency, it effectively reduces heat consumption costs. 2. The rotating shaft drives the spiral scraper to rotate. During the drying process, the spiral scraper can not only turn over the material in the drying drum, but also clean the material adhering to the inner wall of the drying drum. During the discharge process, the spiral scraper can push the material to the discharge pipe for discharge. 3. The installed drain valve can quickly drain the condensate generated in the annular air duct. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the drying cylinder of the present invention; Figure 3 This is a schematic diagram of the structure of the storage box of the present invention; Figure 4 This is a schematic diagram showing the arrangement of the storage bin and the spiral scraper of the present invention; Figure 5 This is a schematic diagram of the spiral scraper of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixing cylinder of the present invention; Figure 7 This is a schematic diagram of the guide groove of the present invention; Figure 8 This is a schematic diagram of the annular air duct structure of the present invention.

[0019] In the diagram: 1-Base; 2-Drive mechanism; 3-Drying cylinder; 4-Inlet pipe; 5-Exhaust pipe; 6-Baffle plate; 7-Annular air duct; 8-Feed pipe; 9-Rotating shaft; 10-Circumferential conveying assembly; 11-Drain valve; 12-Sealing plate; 13-Discharge pipe; 14-Material inlet; 15-Connecting rod; 16-Allowing groove; 17-Storage box; 18-Arc-shaped pressure plate; 19-Guide rod; 20-Sliding rod; 21-Top plate; 22-Fixed cylinder; 23-Compression spring; 24-Spiral scraper; 25-Fixed rod; 26-Guide groove; 27-Compression section; 28-Holding section; 29-Arc-shaped disc; 30-Connecting plate. Detailed Implementation

[0020] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0021] like Figures 1 to 8 As shown, a kitchen waste drying device includes a base 1, a drying cylinder 3 fixedly mounted on the top of the base 1, a rotating shaft 9 rotatably mounted on the inner wall of the drying cylinder 3, and a plurality of circumferential conveying components 10 mounted on the outer wall of the rotating shaft 9 along the axial direction. The circumferential conveying assembly 10 includes several storage boxes 17 arranged circumferentially along the rotating shaft 9. The storage boxes 17 are fixedly connected to the rotating shaft 9. The top of the storage box 17 is open and in frictional contact with the inner wall of the drying cylinder 3. One side wall of the storage box 17 is provided with a material inlet 14. An arc-shaped pressure plate 18 is slidably provided on the inner wall of the storage box 17. During the cyclic rotation of the storage box 17, when the storage box 17 passes through the lower area of ​​the drying cylinder 3, the arc-shaped pressure plate 18 is located at the innermost side of the storage box 17, and the internal space of the storage box 17 increases. The material is discharged first and then enters through the material inlet 14. When the storage box 17 passes through other areas of the drying cylinder 3, the arc-shaped pressure plate 18 slides outward and squeezes the material in the storage box 17. The material contacts the inner wall of the drying cylinder 3 for heat exchange.

[0022] The outer wall of the rotating shaft 9 is provided with several spiral scrapers 24 that rub against the inner wall of the drying cylinder 3. The spiral scrapers 24 and the storage box 17 are arranged alternately in the circumferential direction. The spiral scrapers 24 are fixedly connected to the rotating shaft 9 by a fixing rod 25.

[0023] A guide rod 19 is provided between the storage box 17 and the rotating shaft 9. Several sliding rods 20 are fixedly provided on the outer wall of the guide rod 19. The sliding rods 20 pass through the storage box 17 and are fixedly connected to the arc-shaped pressure plate 18. The sliding rods 20 are slidably connected to the storage box 17. Several arc-shaped disks 29 are fixedly provided inside the drying cylinder 3. Both ends of the arc-shaped disks 29 are provided with guide grooves 26. Both ends of the guide rod 19 are located in the guide grooves 26.

[0024] The guide groove 26 consists of a compression section 27 and a holding section 28. The radius of the compression section 27 increases clockwise, while the radius of the holding section 28 remains constant. The arc-shaped disk 29 and the rotating shaft 9 avoid each other. The arc-shaped disk 29 is fixedly connected to the drying cylinder 3 through the connecting plate 30.

[0025] A number of fixed cylinders 22 are fixedly provided on the storage box 17. The sliding rod 20 passes through the fixed cylinder 22 and is slidably connected to it. A top plate 21 and a compression spring 23 are sleeved on the outer wall of the sliding rod 20 inside the fixed cylinder 22. The top plate 21 is fixedly connected to the sliding rod 20. The two ends of the compression spring 23 abut against the top plate 21 and the storage box 17 respectively.

[0026] The storage box 17 is fixedly connected to the rotating shaft 9 via the connecting rod 15. The connecting rod 15 is provided with a relief groove 16, and the guide rod 19 is located in the relief groove 16.

[0027] The drying cylinder 3 is equipped with an annular air duct 7, and a baffle 6 is installed inside the annular air duct 7. The outer wall of the drying cylinder 3 is equipped with an air inlet pipe 4 and an exhaust pipe 5 on both sides of the baffle 6, and the air inlet pipe 4 and the exhaust pipe 5 are connected to the external steam supply system.

[0028] The lower outer wall of the drying cylinder 3 is equipped with a drain valve 11 that is connected to the annular air duct 7.

[0029] The drying cylinder 3 is equipped with a feed pipe 8 and a discharge pipe 13 at both ends, and the discharge pipe 13 is equipped with a detachable sealing plate 12 at the opening.

[0030] The base 1 has a drive mechanism 2 on top, and one end of the rotating shaft 9 extends to the outside of the drying cylinder 3 and is connected to the drive mechanism 2.

[0031] The drive mechanism 2 is a standard feature in this field, and its specific structure and working principle will not be described in detail here.

[0032] The working principle of this device is as follows: Steam enters the annular air duct 7 through the air inlet pipe 4 and is discharged through the exhaust pipe 5, thereby heating the inner wall of the drying cylinder 3. The material contacts the lower inner wall of the drying cylinder 3 for heat exchange. The rotating shaft 9 drives the storage box 17 to rotate cyclically. When the storage box 17 rotates through the lower area of ​​the drying cylinder 3, the guide rod 19 separates from the arc-shaped plate 29, and the guide rod 19 is released from its restraint. With the cooperation of the compression spring 23, the arc-shaped pressure plate 18 is located at the innermost side of the storage box 17. Therefore, in the initial stage when the storage box 17 enters the lower area of ​​the drying cylinder 3, the arc-shaped pressure plate 18 slides to the innermost side, and the material in the storage box 17 is depressurized and falls through the material outlet 14 into the lower part of the drying cylinder 3 under the action of gravity to complete the discharge. The storage box 17 continues to rotate and enters the lower material of the drying cylinder 3. The material enters the storage box 17 through the material outlet 14 to complete the feeding. When the storage box 17 rotates through the lower area of ​​the drying cylinder 3... When drying other areas of the drying cylinder 3, the guide rod 19 first enters the compression section 27 and pushes the arc-shaped pressure plate 18 to slide outward, thereby squeezing the material in the storage box 17. Then the guide rod 19 enters the holding section 28, and the arc-shaped pressure plate 18 maintains the final squeezing state of the material. Through squeezing, not only can the contact effect between the material and the inner wall of the drying cylinder 3 be improved, but the material in the storage box 17 can also be prevented from falling off too early when descending. When the material in the storage box 17 is circumferentially conveyed, it contacts the inner wall of the drying cylinder 3 for heat exchange. In the process of drying kitchen waste, the kitchen waste can fully contact the inner wall of the cylinder, and the actual wall area participating in heat exchange is effectively increased, which significantly improves the utilization rate of the heat exchange wall surface, thereby enhancing the heat transfer effect per unit time. While improving drying efficiency, it effectively reduces heat consumption costs. The rotating shaft 9 drives the spiral scraper 24 to rotate. During the drying process, the spiral scraper 24 can not only turn over the material in the drying cylinder 3, but also clean the material adhering to the inner wall of the drying cylinder 3. During the discharge process, the spiral scraper 24 can push the material to the discharge pipe 13 for discharge. The installed drain valve 11 can quickly drain the condensate generated in the annular duct 7.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A kitchen waste drying device, characterized in that: Includes a base (1), a drying cylinder (3) is fixedly provided on the top of the base (1), a rotating shaft (9) is rotatably provided on the inner wall of the drying cylinder (3), and a number of circumferential conveying components (10) are provided on the outer wall of the rotating shaft (9) along the axial direction. The circumferential conveying assembly (10) includes several storage boxes (17) arranged circumferentially along the rotating shaft (9). The storage boxes (17) are fixedly connected to the rotating shaft (9). The top of the storage box (17) is open and in frictional contact with the inner wall of the drying cylinder (3). One side wall of the storage box (17) is provided with a material inlet (14). An arc-shaped pressure plate (18) is slidably provided on the inner wall of the storage box (17). During the cyclic rotation of the storage box (17), When the storage box (17) passes through the lower area of ​​the drying cylinder (3), the arc-shaped pressure plate (18) is located at the innermost side of the storage box (17), the internal space of the storage box (17) increases, and the material is discharged first and then enters through the material port (14). When the storage box (17) passes through other areas of the drying cylinder (3), the arc-shaped pressure plate (18) slides outward and squeezes the material in the storage box (17), and the material contacts the inner wall of the drying cylinder (3) for heat exchange.

2. The kitchen waste drying device according to claim 1, characterized in that: The outer wall of the rotating shaft (9) is provided with a number of spiral scrapers (24) that rub against the inner wall of the drying cylinder (3). The spiral scrapers (24) and the storage box (17) are arranged alternately in the circumferential direction. The spiral scrapers (24) are fixedly connected to the rotating shaft (9) by a fixing rod (25).

3. The kitchen waste drying device according to claim 1, characterized in that: A guide rod (19) is provided between the storage box (17) and the rotating shaft (9). Several sliding rods (20) are fixedly provided on the outer wall of the guide rod (19). The sliding rods (20) pass through the storage box (17) and are fixedly connected to the arc-shaped pressure plate (18). The sliding rods (20) are slidably connected to the storage box (17). Several arc-shaped disks (29) are fixedly provided inside the drying cylinder (3). Both ends of the arc-shaped disks (29) are provided with guide grooves (26). Both ends of the guide rod (19) are located in the guide grooves (26).

4. The kitchen waste drying device according to claim 3, characterized in that: The guide groove (26) is composed of a compression section (27) and a holding section (28). The radius of the compression section (27) increases in a clockwise direction, while the radius of the holding section (28) remains constant. The arc-shaped disk (29) and the rotating shaft (9) avoid each other. The arc-shaped disk (29) is fixedly connected to the drying cylinder (3) through a connecting plate (30).

5. A kitchen waste drying device according to claim 3, characterized in that: The storage box (17) is fixedly provided with several fixed cylinders (22). The sliding rod (20) passes through the fixed cylinder (22) and is slidably connected to it. The outer wall of the sliding rod (20) is fitted with a top plate (21) and a compression spring (23) inside the fixed cylinder (22). The top plate (21) is fixedly connected to the sliding rod (20). The two ends of the compression spring (23) abut against the top plate (21) and the storage box (17) respectively.

6. A kitchen waste drying device according to claim 3, characterized in that: The storage box (17) is fixedly connected to the rotating shaft (9) via a connecting rod (15). A clearance groove (16) is provided through the connecting rod (15), and the guide rod (19) is located in the clearance groove (16).

7. A kitchen waste drying device according to claim 1, characterized in that: The drying cylinder (3) is provided with an annular air duct (7), and the annular air duct (7) is provided with a partition (6). The outer wall of the drying cylinder (3) is provided with an air inlet pipe (4) and an exhaust pipe (5) on both sides of the partition (6). The air inlet pipe (4) and the exhaust pipe (5) are connected to an external steam supply system.

8. A kitchen waste drying device according to claim 7, characterized in that: The lower outer wall of the drying cylinder (3) is provided with a drain valve (11) that communicates with the annular air duct (7).

9. A kitchen waste drying device according to claim 1, characterized in that: The drying cylinder (3) is provided with a feed pipe (8) and a discharge pipe (13) at both ends, and the discharge pipe (13) is provided with a detachable sealing plate (12) at the opening.

10. A kitchen waste drying device according to claim 1, characterized in that: The base (1) is provided with a drive mechanism (2) at the top, and one end of the rotating shaft (9) extends to the outside of the drying cylinder (3) and is connected to the drive mechanism (2).

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