A rotary sludge high-efficiency drying equipment

Abstract

A rotary sludge high-efficiency drying device belongs to the field of sludge drying technology. The invention includes a base, a support seat fixedly installed on the top of the base, and a drying cylinder rotatably mounted inside the support seat. A sludge crushing mechanism is installed inside the drying cylinder. A drive seat is slidably mounted on the top of the base, and a feed cover is fixedly connected to the top of the drive seat. A discharge port is rotatably connected to the side wall of the drying cylinder, which, after being rotated and unlocked, is used to discharge the dried sludge. A cone-shaped nozzle periodically pierces and retracts from the sludge blocks located at the bottom of the drying cylinder. This piercing breaks the hard outer shell of the sludge, creating pores and cracks inside the sludge. High-temperature hot air can directly penetrate into the interior of the sludge blocks through these pores and cracks, significantly increasing the heat transfer contact area, improving the moisture evaporation rate in the initial drying stage, and shortening the residence time of the sludge in the drying cylinder, thereby improving the overall drying capacity and efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of sludge drying technology, and more particularly to a rotary sludge high-efficiency drying device. Background Technology

[0002] Rotary sludge dryers are devices that utilize thermal energy to dehydrate and dry sludge with high moisture content. Their technical principle primarily involves heat exchange between the heat generated by a heating device and the sludge, causing the moisture in the sludge to evaporate and achieving a predetermined degree of dryness. During the drying process, the heat energy typically comes from hot air or a heat transfer medium provided by fuel combustion, electric heating, or waste heat recovery. To improve drying efficiency, existing rotary dryers usually have lifting plates or stirring devices installed on the inner wall of their rotating drum. The rotation of the drum drives the lifting plates to continuously tumble, lift, and scatter the sludge, thereby increasing the contact area between the sludge and the heat medium and extending the effective drying time.

[0003] Currently, the mainstream technology for sludge drying is to achieve heating and drying by exchanging heat with a heat transfer medium. Based on the contact method between the heat transfer medium and the sludge, it can be divided into three types: direct drying, indirect drying, and hybrid drying. In indirect drying technology, the heat transfer medium, such as heat transfer oil or steam, does not directly contact the sludge. Instead, it flows through the interior of a heat exchanger, such as a guide pipe, hollow disc, or cylindrical jacket, transferring heat through the metal wall to the sludge outside the heat exchanger, thereby promoting the evaporation and discharge of moisture from the sludge.

[0004] When highly viscous sludge enters the rotary drum, its surface moisture evaporates rapidly during the initial heating phase, easily forming a dense, hard, sealed outer shell. This hard shell severely hinders the migration of internal moisture to the surface, making it difficult for heat to transfer to the interior of the sludge mass, resulting in uneven drying. Existing rotary sludge dryers with lifting plates or stirring devices primarily function to turn and spread the sludge on its surface, but they lack effective active breaking capabilities for the hard shell that has already formed. They cannot promptly break down this hard shell structure to expose the internal moist areas, thus reducing the heat exchange efficiency in the initial drying phase, prolonging the sludge's residence time in the drum, and limiting the overall drying capacity and efficiency of the equipment. Summary of the Invention

[0005] The purpose of this invention is to solve the problems raised in the prior art, and to propose a rotary sludge high-efficiency drying device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary sludge high-efficiency drying device, including a machine base, a support seat fixedly installed on the top of the machine base, and a drying cylinder rotatably installed inside the support seat, a sludge crushing mechanism being provided inside the drying cylinder, a drive seat slidably installed on the top of the machine base, and a feed cover fixedly connected to the top of the drive seat, and a discharge port rotatably connected to the side wall of the drying cylinder, which is used to discharge the dried sludge after being rotated and unlocked; The mud crushing mechanism includes a fixed frame fixedly connected to the inner wall of the drying cylinder. A rotating shaft is slidably connected through the inside of the fixed frame, and a disc is rotatably connected to the outer wall of the rotating shaft. A cam is driven by a spiral telescopic assembly on the disc. A slot is opened through the side wall of the cam. A locking block is fixedly connected to the outer wall of the rotating shaft. The outer wall of the locking block is engaged with the inner wall of the slot. Several sliding rods are provided inside the disc. A sliding groove is opened at the end of each sliding rod away from the disc. A cone head is slidably connected to the inner wall of the sliding groove. The slide bar is equipped with a sludge dispersion mechanism for expanding and breaking up sludge blocks inside the block.

[0007] Furthermore, the spiral telescopic assembly includes a toothed block fixedly connected to the outer wall of the rotating shaft. A toothed hole is provided through the side wall of the fixing frame. The inner wall of the toothed hole slides in conjunction with the outer wall of the toothed block. A spiral through groove is provided through the interior of the disc. A pressing block is fixedly connected to one end of the slide rod located inside the disc. A first spring is fixedly connected to the side wall of the pressing block facing the slide rod. The end of the first spring away from the pressing block is fixedly connected to the interior of the disc. A protrusion is fixedly connected to the outer wall of the slide rod. A fixing rod is fixedly connected to the side wall of the disc. A fixing plate is fixedly connected to the end of the fixing rod away from the disc.

[0008] Furthermore, the outer wall of the toothed block is adapted to the inner wall contour of the toothed hole, the side wall of the extrusion block away from the slide bar corresponds to the outer wall of the cam, the outer wall of the protrusion is slidably connected to the inner wall of the spiral groove, the side of the fixed disk away from the fixed rod is fixedly connected to the inner wall of the feed cover, and the side wall of the cam is rotatably connected to the inside of the disc.

[0009] Furthermore, the mud dispersing mechanism includes an inner groove inside the slide rod. A movable disc is slidably connected to the inner wall of the inner groove, and a second spring is fixedly connected to the side wall of the movable disc. A connecting rod is fixedly connected to the side of the movable disc away from the second spring, and a conical block is fixedly connected to the end of the connecting rod away from the movable disc. Two expansion plates are slidably connected through the interior of the slide rod. The two expansion plates are symmetrically arranged with respect to the axis of the slide rod. A third spring for providing radial inward reset force is fixedly connected between the two expansion plates located at their ends inside the slide rod.

[0010] Furthermore, the end of the second spring away from the movable disc is fixedly connected to the inner wall of the inner groove, the end of the conical block away from the connecting rod is fixedly connected to the end of the cone head, and the side wall of the expansion plate slides against the inclined outer wall surface of the conical block.

[0011] Furthermore, when the conical block moves axially along the direction of the chute, the two expansion plates are pushed outward along the radial direction of the slide rod by the inclined outer wall of the conical block, so as to form a radial spreading force inside the sludge block.

[0012] Furthermore, when the end of the cone is squeezed by the inner wall of the drying cylinder, it drives the cone block to move along the groove toward the moving disc, thereby driving the two expansion plates to expand outward.

[0013] Furthermore, a spiral blade is fixedly connected to the inner wall of the machine base, and a lifting plate is fixedly connected to the inner wall of the machine base. The spiral blade and the lifting plate are arranged at intervals along the axial direction of the drying cylinder. A fixed seat is fixedly connected to the top of the machine base, and a geared motor is fixedly installed on the top of the fixed seat. The output end of the geared motor is connected to the end of the drying cylinder to drive the drying cylinder to rotate around its own axis.

[0014] Compared with existing technologies, the above solution has the following advantages: 1. By periodically inserting and withdrawing a cone-shaped tip into the sludge block at the bottom of the drying cylinder, the hard outer shell of the sludge surface is broken, creating pores and cracks inside the sludge. High-temperature hot air can then penetrate directly into the sludge block through these pores and cracks, significantly increasing the heat transfer contact area, improving the moisture evaporation rate in the initial drying stage, and shortening the residence time of the sludge in the drying cylinder. This enhances the overall drying capacity and efficiency of the equipment for sludge.

[0015] 2. The cone tip can penetrate the hard outer shell of the sludge block by rotating and advancing like a drill bit, making the piercing action smoother and more stable. This significantly reduces the reaction force on the cone tip and the first spring. During the withdrawal phase after each piercing, the cone surface of the rotating cone tip generates relative rotational friction with the sludge hole wall, which can effectively peel off the residual sludge adhering to the cone tip surface, playing a passive self-cleaning role and preventing sludge from accumulating layer by layer on the cone tip surface, thus affecting the accuracy of subsequent piercing depths.

[0016] 3. During the movement of the conical block, the inclined outer wall surface exerts a squeezing and pushing force on the side walls of the two expansion plates, causing the inside of the slide rod to expand outward. Thus, the outer wall of the expansion plate applies a radial spreading force to the inside of the sludge block, which can tear and disperse large pieces of sludge along their weak interfaces from the inside, increase the exposed area of ​​the moist area inside the sludge, shorten the time required for the subsequent drying stage, and improve the drying uniformity and consistency of the finished granules. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the drying cylinder proposed in this invention; Figure 2 This is a schematic diagram of the overall structure proposed in this invention; Figure 3 This is a schematic diagram of the structural connection between the fixing frame and the fixing plate proposed in this invention; Figure 4 This is a schematic diagram of the transmission structure of the rotating shaft and slide rod proposed in this invention; Figure 5 This is a schematic diagram of the internal structure of the slide bar proposed in this invention; Figure 6 The present invention proposes Figure 5 Enlarged view of point A.

[0018] The labels in the attached diagram are as follows: 1. Machine base; 2. Support seat; 3. Drying cylinder; 4. Mud crushing mechanism; 5. Mud dispersing mechanism; 6. Spiral blade; 7. Lifting plate; 8. Fixed seat; 9. Gear motor; 10. Drive seat; 11. Feed cover; 12. Discharge port; 401. Fixed frame; 402. Toothed hole; 403. Rotating shaft; 404. Toothed block; 405. Disc; 406. Spiral groove; 407. Slide rod; 408. Extrusion block; 409. First spring; 410. Protrusion; 411. Fixed rod; 412. Fixed disc; 413. Cam; 414. Slot; 415. Slot; 416. Slide groove; 417. Conical head; 501. Inner groove; 502. Movable disc; 503. Second spring; 504. Connecting rod; 505. Conical block; 506. Expansion plate; 507. Third spring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In the description of this invention, it should be understood that the terms "upper," "lower," "top surface," "bottom surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are only used to distinguish an entity or operation from another entity or operation, and do not require or imply any actual relationship, order, or relative importance between these entities or operations.

[0021] Example 1, please refer to Figures 1-5 A rotary sludge high-efficiency drying device includes a base 1, a support seat 2 fixedly installed on the top of the base 1, and a drying cylinder 3 rotatably installed inside the support seat 2. A sludge crushing mechanism 4 is provided inside the drying cylinder 3. Spiral blades 6 and lifting plates 7 are fixedly connected to the inner wall of the base 1. The spiral blades 6 and lifting plates 7 are arranged at intervals along the axial direction of the drying cylinder 3. A fixed seat 8 is fixedly connected to the top of the base 1, and a reduction motor 9 is fixedly installed on the top of the fixed seat 8. The output end of the reduction motor 9 is connected to the end of the drying cylinder 3 to drive the drying cylinder 3 to rotate around its own axis. A drive seat 10 is slidably installed on the top of the base 1, and a feed cover 11 is fixedly connected to the top of the drive seat 10. A discharge port 12 is rotatably connected to the side wall of the drying cylinder 3.

[0022] Specifically, when sludge needs to be dried, the drive unit 10 first drives the feed cover 11 to disengage from the sealed connection with the drying cylinder 3. Then, the sludge is fed into the drying cylinder 3 through the corresponding position between the feed cover 11 and the drying cylinder 3, and accumulates inside the drying cylinder 3 under gravity in the area corresponding to the spiral blades 6. Afterwards, the drive unit 10 drives the feed cover 11 to contact and close the seal with the drying cylinder 3. By tilting the drying cylinder 3, creating a height difference between its two ends, the reduction motor 9 outputs power, and its output shaft drives the drying cylinder... The entire cylinder 3 rotates under the support of the support base 2. As the drying cylinder 3 continues to rotate, the spiral blades 6 push the sludge forward. Then, the sludge will slowly roll from one end of the drying cylinder 3 to the other end. The drying cylinder 3 uses a built-in heating component to allow hot air to exchange heat with the inside of the sludge. After entering the area of ​​the lifting plate 7, the lifting plate 7 continuously lifts, raises and throws the sludge from the bottom. As the sludge is lifted and falls, it will break up to form a material curtain. Then, the sludge material curtain is discharged by opening the discharge port 12 to complete the efficient drying treatment of the sludge.

[0023] Furthermore, the mud crushing mechanism 4 includes a fixed frame 401 fixedly connected to the inner wall of the drying cylinder 3. A rotating shaft 403 is slidably connected through the inside of the fixed frame 401, and a disc 405 is rotatably connected to the outer wall of the rotating shaft 403. The disc 405 is connected to a cam 413 through a spiral telescopic assembly. A slot 414 is provided through the side wall of the cam 413. A locking block 415 is fixedly connected to the outer wall of the rotating shaft 403. The outer wall of the locking block 415 is engaged with the inner wall of the slot 414. Several sliding rods 407 are provided inside the disc 405. A sliding groove 416 is provided at the end of the sliding rods 407 away from the disc 405. A cone head 417 is slidably connected to the inner wall of the sliding groove 416.

[0024] During the drying process, some sludge with a moisture content still in the critical range is very likely to form a dense and hard shell after being heated on the surface. The internal moisture is completely wrapped and difficult to escape, which leads to a decrease in drying quality or the need to extend the drying time. By setting up a sludge crushing mechanism 4, when the reduction motor 9 drives the drying cylinder 3 to rotate around its own axis, the drying cylinder 3 drives the fixed frame 401 fixedly connected to its inner wall to rotate synchronously. Since the rotating shaft 403 is inserted into the fixed frame 401 through the spiral sliding cooperation of the toothed block 404 and the toothed hole 402, and at the same time, the end of the rotating shaft 403 applies the rotational force to the cam 413 through the snap-fit ​​cooperation of the snap-fit ​​block 415 and the snap-fit ​​groove 414.

[0025] Since the disc 405 is fixed to the inner wall of the feed cover 11 via the fixed disc 412 connected by the fixed rod 411, during the rotation of the drying cylinder 3, the cam 413 continuously rotates inside the disc 405. When the outer contour of the cam 413 rotates to a specified angle, it contacts and squeezes the extrusion block 408, then pushes the extrusion block 408 to overcome the elastic force of the first spring 409 and drives the slide rod 407 to extend outward as a whole. After the cam 413 has rotated through the extrusion stroke, the force of the first spring 409 pushes the extrusion block 408 and the slide rod 407 outward. 07 Reset and retract. During this process, the cone 417 located at the end of the slide bar 407 periodically pierces and retracts from the sludge block at the bottom of the drying cylinder 3. By piercing and destroying the hard shell surface of the sludge, pores and cracks are created inside the sludge. Then, high-temperature hot air can directly penetrate into the interior of the sludge block through these pores, effectively increasing the heat transfer contact area, improving the water evaporation rate in the early stage of drying, and shortening the residence time of the sludge in the drying cylinder 3. This enhances the overall drying capacity and efficiency of the equipment for sludge.

[0026] Furthermore, the spiral telescopic assembly includes a toothed block 404 fixedly connected to the outer wall of the rotating shaft 403; a toothed hole 402 is provided through the side wall of the fixing frame 401; the inner wall of the toothed hole 402 slides in conjunction with the outer wall of the toothed block 404; a spiral through groove 406 is provided through the interior of the disc 405; a pressing block 408 is fixedly connected to one end of the slide rod 407 located inside the disc 405; a first spring 409 is fixedly connected to the side wall of the pressing block 408 facing the slide rod 407; and the end of the first spring 409 away from the pressing block 408 is fixedly connected to the interior of the disc 405. The outer wall of the disc 405 is fixedly connected to a protrusion 410, the side wall of the disc 405 is fixedly connected to a fixing rod 411, and the end of the fixing rod 411 away from the disc 405 is fixedly connected to a fixing plate 412. The outer wall of the toothed block 404 is adapted to the inner wall contour of the toothed hole 402. The side wall of the extrusion block 408 away from the slide rod 407 corresponds to the outer wall of the cam 413. The outer wall of the protrusion 410 is slidably connected to the inner wall of the spiral groove 406. The side of the fixing plate 412 away from the fixing rod 411 is fixedly connected to the inner wall of the feed cover 11. The side wall of the cam 413 is rotatably connected to the inside of the disc 405.

[0027] Specifically, during the drying operation, as the slide rod 407 extends outward, due to the helical guiding relationship between the protrusion 410 and the helical groove 406, the slide rod 407 and its end cone 417 rotate simultaneously throughout the entire radial extension and retraction stroke. This allows the cone 417 to penetrate the hard outer shell of the sludge block in a drill-like rotating and advancing manner, dispersing the axial piercing resistance into a progressive cutting force along the helical direction. This significantly reduces the force required for piercing, making the piercing action smoother and more stable. It also significantly reduces the degree of reaction force on the cone 417 and the first spring 409. At the same time, during the withdrawal phase after each piercing, the rotating cone 417 generates relative rotational friction between its conical surface and the sludge hole wall, which effectively peels off the residual sludge adhering to the surface of the cone 417, playing a certain passive self-cleaning role and preventing the sludge from accumulating layer by layer on the surface of the cone 417 and ultimately affecting the piercing depth.

[0028] Example 2, please refer to Figures 1-6 Based on Embodiment 1, in this embodiment, the mud dispersing mechanism 5 includes an inner groove 501 opened inside the slide rod 407. The inner wall of the inner groove 501 is slidably connected to a movable disk 502, and a second spring 503 is fixedly connected to the side wall of the movable disk 502. A connecting rod 504 is fixedly connected to the side of the movable disk 502 away from the second spring 503, and a conical block 505 is fixedly connected to the end of the connecting rod 504 away from the movable disk 502. Two expansion plates 506 are slidably connected through the inside of the slide rod 407. The two expansion plates 506 are symmetrically arranged with respect to the axis of the slide rod 407. A third spring 507 for providing radial inward reset tension is fixedly connected between the two expansion plates 506 located inside the slide rod 407. Furthermore, the end of the second spring 503 away from the movable disc 502 is fixedly connected to the inner wall of the inner groove 501, and the end of the conical block 505 away from the connecting rod 504 is fixedly connected to the end of the cone head 417. The side wall of the expansion plate 506 slides against the inclined outer wall surface of the conical block 505. When the conical block 505 moves axially along the direction of the slide groove 416, the two expansion plates 506 are pushed outward along the radial direction of the slide rod 407 by the inclined outer wall of the conical block 505 to form a radial spreading force inside the sludge block. When the end of the cone head 417 is squeezed by the inner wall of the drying cylinder 3, it drives the conical block 505 to move along the slide groove 416 towards the direction of the movable disc 502, thereby driving the two expansion plates 506 to expand outward.

[0029] Specifically, after the cone 417 extends along with the slide rod 407 and penetrates the sludge block, the conical tip of the cone 417 contacts the inner wall of the drying cylinder 3. The continued movement of the slide rod 407 then causes the cone 417 to press against the inner wall of the drying cylinder 3 and experience a rigid compressive reaction force from the inner wall. Under this compressive reaction force, the cone 417 is forced to retract and slide along the axial direction of the slide groove 416 towards the movable disc 502. The retraction of the cone 417 then directly drives the conical block fixedly connected to its end. 505 moves synchronously along the axial direction. During the movement, the inclined outer wall surface of the conical block 505 generates a squeezing force on the side walls of the two expansion plates 506, causing the two expansion plates 506 to overcome the reset pull provided by the third spring 507. Then, they expand outward along the inside of the slide rod 407, thereby applying a radial spreading force to the inside of the sludge block through the outer wall of the expansion plate 506. This can tear and disperse large pieces of sludge from the inside, increase the exposed area of ​​the moist area inside the sludge, significantly shorten the time required for the drying stage, and improve the drying uniformity and consistency of the finished particles.

[0030] It should be noted that all the devices in this application are common devices on the market, and can be selected according to the needs of specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can easily implement it. It belongs to the prior art and will not be described in detail.

[0031] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A rotary sludge high-efficiency drying device comprising a machine base (1), characterized in that: The top of the machine base (1) is fixedly provided with a supporting seat (2), and a drying cylinder (3) is rotatably arranged in the supporting seat (2); the inside of the drying cylinder (3) is provided with a mud block breaking mechanism (4); the top of the machine base (1) is slidably provided with a driving seat (10), and the top of the driving seat (10) is fixedly connected with a feeding cover (11); the side wall of the drying cylinder (3) is rotatably connected with a discharge port (12) for discharging dried sludge after being unlocked; The mud block breaking mechanism (4) comprises a fixed frame (401) fixedly connected to the inner wall of the drying cylinder (3), a rotating shaft (403) slidably penetrating through the inside of the fixed frame (401), and a disc (405) rotatably connected to the outer wall of the rotating shaft (403); the disc (405) is drivingly connected with a cam (413) through a screw telescopic assembly; the side wall of the cam (413) is provided with a clamping groove (414); the outer wall of the rotating shaft (403) is fixedly connected with a clamping block (415); the outer wall of the clamping block (415) is clamped to the inner wall of the clamping groove (414); the inside of the disc (405) is provided with a plurality of slide rods (407); the ends of the slide rods (407) away from the disc (405) are provided with sliding grooves (416); and the inner wall of the sliding groove (416) is slidably connected with a tapered head (417). The inside of the slide rod (407) is provided with a mud block dispersing mechanism (5) for expanding and breaking the sludge block.

2. The rotary high-efficiency sludge drying device according to claim 1, characterized in that, The screw telescopic assembly comprises a tooth block (404) fixedly connected to the outer wall of the rotating shaft (403); the side wall of the fixed frame (401) is provided with a tooth hole (402); the inner wall of the tooth hole (402) is slidably matched with the outer wall of the tooth block (404); the inside of the disc (405) is provided with a spiral groove (406); one end of the slide rod (407) inside the disc (405) is fixedly connected with a pressing block (408); the side wall of the slide rod (407) towards the pressing block (408) is fixedly connected with a first spring (409); the end of the first spring (409) away from the pressing block (408) is fixedly connected to the inside of the disc (405); the outer wall of the slide rod (407) is fixedly connected with a protruding block (410); the side wall of the disc (405) is fixedly connected with a fixed rod (411); and one end of the fixed rod (411) away from the disc (405) is fixedly connected with a fixed disc (412).

3. A rotary sludge high efficiency drying apparatus according to claim 2, wherein The outer wall of the tooth block (404) is matched with the inner wall of the tooth hole (402); the end of the pressing block (408) away from the side wall of the slide rod (407) is matched with the outer wall of the cam (413); the outer wall of the protruding block (410) is slidably connected to the inner wall of the spiral groove (406); one side of the fixed disc (412) away from the fixed rod (411) is fixedly connected to the inner wall of the feeding cover (11); and the side wall of the cam (413) is rotatably connected to the inside of the disc (405).

4. The rotary high-efficiency sludge drying device according to claim 1, characterized in that, The mud dispersing mechanism (5) includes an inner groove (501) inside the slide rod (407). A movable disc (502) is slidably connected to the inner wall of the inner groove (501), and a second spring (503) is fixedly connected to the side wall of the movable disc (502). A connecting rod (504) is fixedly connected to the side of the movable disc (502) away from the second spring (503), and a conical block (505) is fixedly connected to the end of the connecting rod (504) away from the movable disc (502). Two expansion plates (506) are slidably connected through the interior of the slide rod (407). The two expansion plates (506) are symmetrically arranged with respect to the axis of the slide rod (407). A third spring (507) for providing radial inward reset force is fixedly connected between the two expansion plates (506) located inside the slide rod (407).

5. A rotary sludge high efficiency drying apparatus according to claim 4, wherein The second spring (503) is fixedly connected to the inner wall of the inner groove (501) at one end away from the movable disc (502), and the conical block (505) is fixedly connected to the end of the cone head (417) at one end away from the connecting rod (504). The side wall of the expansion plate (506) is slidably attached to the inclined outer wall surface of the conical block (505).

6. A rotary sludge high efficiency drying apparatus according to claim 4, wherein When the conical block (505) moves axially along the direction of the groove (416), the two expansion plates (506) are pushed outward along the radial direction of the slide rod (407) by the inclined outer wall of the conical block (505) to form a radial spreading force inside the sludge block.

7. A rotary sludge high efficiency drying apparatus according to claim 4, wherein When the end of the cone (417) is squeezed by the inner wall of the drying cylinder (3), it drives the cone block (505) to move along the slide groove (416) towards the moving disk (502), thereby driving the two expansion plates (506) to expand outward.

8. The rotary sludge high-efficiency drying device according to claim 1, characterized in that, The inner wall of the machine base (1) is fixedly connected with a spiral blade (6) and a lifting plate (7). The spiral blade (6) and the lifting plate (7) are arranged at intervals along the axial direction of the drying cylinder (3). The top of the machine base (1) is fixedly connected with a fixed seat (8), and a geared motor (9) is fixedly installed on the top of the fixed seat (8). The output end of the geared motor (9) is connected to the end of the drying cylinder (3) to drive the drying cylinder (3) to rotate around its own axis.

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