Sludge thermal drying mechanism

Abstract

The present application relates to the technical field of sludge drying, in particular to a sludge hot drying mechanism, which comprises a main body, a scraper mechanism is rotatably connected inside the main body, a driving motor is arranged at one end of the main body, a tail pipe is arranged at the other end of the main body, a limiting groove is formed at a position close to the main body inside the tail pipe, the scraper mechanism comprises a rotating rod rotatably installed inside the main body, the rotating rod is slidably connected with a transmission shaft of the driving motor at one end, a connecting port is formed on the circumferential outer surface of the rotating rod, a sliding hole is arranged inside the rotating rod, the connecting port and the sliding hole are in communication, and a sliding rod is slidably connected in the sliding hole. The present application forms a thin layer by using the digging plate to uniformly coat the sludge on the digging surface, significantly increases the contact surface of the sludge and the heat medium, and realizes continuous drying and forward movement of the sludge by combining the continuous rotation of the extension rod and the digging plate with the pushing of the digging plate, so that the digging plate can remove and push the sludge, and the treatment is continuous and efficient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge drying, in particular to a sludge thermal drying mechanism. BACKGROUND

[0002] In the complex and important field of environmental protection, sludge drying is not only a key link to improve the efficiency of subsequent treatment process, but also an indispensable step to achieve sludge reduction, stabilization and even resource utilization. With the acceleration of urbanization and the increase of industrial activities, the amount of sludge has increased dramatically. How to efficiently and economically treat these sludge and reduce its negative impact on the environment has become a global problem that needs to be solved.

[0003] Traditional sludge drying methods, such as natural air drying and hot air blowing, can achieve sludge drying to some extent, but they generally have the disadvantages of high energy consumption, low efficiency, and long cycle. More importantly, these methods often cannot avoid the adhesion of sludge to the inner wall of the equipment during the drying process, which not only increases the difficulty and cost of equipment cleaning, but also may lead to uneven drying effect and affect the final quality of the sludge.

[0004] In order to overcome the limitations of traditional methods, thin-layer drying technology has emerged and developed rapidly. This technology uses a specially designed equipment structure to make the sludge uniformly heated in a very thin layer, greatly improving the heat transfer efficiency and water evaporation rate, thereby significantly shortening the drying time and reducing energy consumption. At the same time, the thin-layer state also helps to reduce the mutual adhesion of sludge and prevent the occurrence of adhesion phenomenon.

[0005] However, although thin-layer drying technology has shown great potential in sludge treatment, existing thin-layer drying equipment still faces many challenges in practical application. First, the complex composition and physical properties of sludge make it prone to form an adhesion layer on the inner wall of the cylinder during the drying process, which not only affects the drying efficiency, but also may cause corrosion and blockage of the equipment. Second, due to the difficulty in controlling the thickness of the sludge layer and the uniformity of heating, existing equipment often fails to achieve ideal drying effect and has the problem of uneven drying. Finally, the complex structure and precise components of the equipment also increase the difficulty and cost of maintenance, and require higher skill level of the operators.

[0006] Therefore, it is particularly important to develop a more efficient, stable, and easy-to-maintain sludge thermal drying mechanism to address the existing problems and challenges of existing thin-layer drying equipment. Through technological innovation and optimization design, the efficiency and quality of sludge drying can be improved, energy consumption and cost can be reduced, and the sustainable development of the sludge treatment industry can be promoted. SUMMARY

[0007] The sludge thermal drying mechanism is used to solve the problem that the sludge is easy to form an adhering layer on the inner wall of the equipment (such as the inner wall of a cylinder) during the drying process, which not only increases the difficulty and cost of equipment cleaning, but also may affect the drying effect and cause the quality of the sludge to decrease.

[0008] To solve the above technical problems, the present application adopts one technical solution: a sludge thermal drying mechanism is provided, which comprises a main body, a scraper mechanism is rotatably connected inside the main body, a driving motor is arranged at one end of the main body, a tail pipe is arranged at the other end of the main body, a limiting groove is formed at a position close to the main body inside the tail pipe, the scraper mechanism comprises a rotating rod rotatably installed inside the main body, one end of the rotating rod is slidably connected with a transmission shaft of the driving motor, a connecting port is formed on the circumferential outer surface of the rotating rod, a sliding hole is arranged inside the rotating rod, the connecting port and the sliding hole are in communication, a sliding rod is slidably connected in the sliding hole, an extrusion groove is formed on the circumferential outer surface of the sliding rod at a position corresponding to the connecting port, a flap is slidably connected inside the connecting port, a sliding block is arranged at the bottom of the flap and clamped in the extrusion groove, a material digging surface is arranged on one side of the flap, a shovel plate is arranged at the top of the flap, and a cutting surface is arranged on one side of the shovel plate.

[0009] The main body is further provided with a sandwich layer in the wall, a heat exchange port is arranged on the outer wall of the main body and is in communication with the sandwich layer, a heat medium is injected to realize heat exchange, a drainage port is arranged at the bottom of the main body and is in communication with the sandwich layer, and condensed liquid inside the sandwich layer is discharged.

[0010] The main body is further provided with a sandwich layer in the wall, a heat exchange port is arranged on the outer wall of the main body and is in communication with the sandwich layer, a heat medium is injected to realize heat exchange, a drainage port is arranged at the bottom of the main body and is in communication with the sandwich layer, and condensed liquid inside the sandwich layer is discharged.

[0011] The main body is further provided with a sandwich layer in the wall, a heat exchange port is arranged on the outer wall of the main body and is in communication with the sandwich layer, a heat medium is injected to realize heat exchange, a drainage port is arranged at the bottom of the main body and is in communication with the sandwich layer, and condensed liquid inside the sandwich layer is discharged.

[0012] The main body is further provided with a sandwich layer in the wall, a heat exchange port is arranged on the outer wall of the main body and is in communication with the sandwich layer, a heat medium is injected to realize heat exchange, a drainage port is arranged at the bottom of the main body and is in communication with the sandwich layer, and condensed liquid inside the sandwich layer is discharged.

[0013] The application is further provided with a limiting ring on the circumferential outer surface of the rotating rod near the tail pipe, a connecting head rotatably connected inside the rotating rod near the tail pipe, a limiting clamping groove on the circumferential outer surface of the rotating rod near the limiting ring, a sealing plate rotatably connected inside the limiting clamping groove, the sealing plate slidingly connected with the inner wall of the main body, a connecting block rotatably connected with the outer wall of the limiting ring, the sealing plate fixedly connected with the connecting block at one end, the end of the sealing plate slidingly connected with the inner wall of the limiting groove, and the connecting block internally provided with an extension rod one, the output end of the extension rod one fixedly connected with the connecting head, and the tail pipe internally provided with an extension rod two, the output end of the extension rod two fixedly connected with the connecting block.

[0014] The application is further provided with a butt joint hole on the end of the rotating rod near the driving motor, the driving motor provided with a transmission shaft, the transmission shaft extended to the inside of the butt joint hole and slidingly connected.

[0015] The application is further provided with,

[0016] The application has the following advantages:

[0017] 1. The digging surface of the turning plate is used to uniformly coat the sludge on the inner wall of the main body to form an extremely thin sludge layer, greatly increasing the contact area of the sludge and the heat medium, improving the heat conduction efficiency and the water evaporation rate, thereby realizing the rapid drying of the sludge, shortening the drying period, and reducing the energy consumption.

[0018] 2. After the turning plate completes one circle of coating, the extension rod one and the extension rod two are cooperated to drive the sliding rod and the rotating rod to move, so that the turning plate and the shovel plate thereon temporarily leave the inner wall of the main body, and then reset and tightly adhere to the inner wall for cleaning. In this process, the cutting surface of the shovel plate effectively removes the sludge adhered to the inner wall, preventing the accumulation and adhesion of the sludge, and maintaining the cleanliness and efficient operation of the equipment.

[0019] 3. Through the continuous rotation of the turning plate and the pushing action of the shovel plate, the continuous drying and forward movement of the sludge in the main body are realized. The shovel plate not only removes the sludge, but also pushes it to the next coating position, providing space for new sludge coating, thereby realizing the continuity and efficiency of sludge treatment. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the purpose, technical scheme and advantages of the application clearer, the application is further described in detail below with specific examples.

[0021] It should be noted that the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art unless otherwise defined. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Figure 1 is a perspective view of a sludge heat-drying mechanism of the present application;

[0023] Figure 2 is an exploded view of a sludge heat-drying mechanism of the present application;

[0024] Figure 3 is a sectional view of a sludge heat-drying mechanism of the present application;

[0025] Figure 4 is an exploded view of a scraper mechanism of a sludge heat-drying mechanism of the present application;

[0026] Figure 5 is a sectional view of a scraper mechanism of a sludge heat-drying mechanism of the present application.

[0027] Marked in the figure:

[0028] 1, main body; 11, interlayer; 111, heat exchange port; 112, drain port;

[0029] 12, scraper mechanism; 121, rotating rod; 1211, butt joint hole; 1212, sliding hole; 1213, connecting port; 1214, limiting clamping groove; 1215, limiting ring; 122, sliding rod; 1221, extrusion groove; 123, turning plate; 1231, material digging surface; 1232, sliding block; 1233, shovel plate; 1234, cutting surface; 124, sealing plate; 125, connecting block; 126, connecting head; 127, telescopic rod one; 128, telescopic rod two;

[0030] 13, tail pipe; 131, limiting groove; 14, feed port; 15, exhaust port; 16, discharge port; 17, support seat; 18, driving motor; 181, transmission shaft. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments and features of the present application can be combined with each other in the case of no conflict; the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left" and "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, can also be integrated; can be mechanical connection, can also be transmission connection; can be direct connection, can also be indirect connection through intermediate medium, or can be internal communication of two elements or interaction relationship between two elements.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 5The utility model provides a sludge hot drying mechanism, including main part 1, the scraper mechanism 12 is rotatably connected in main part 1, one end of main part 1 is provided with drive motor 18, the other end of main part 1 is provided with tail pipe 13, the position of tail pipe 13 inside near main part 1 is opened to limit groove 131, the scraper mechanism 12 includes the rotation installation in the inside of main part 1 and turns the rod 121, and one end of the rod 121 is slidably connected with the transmission shaft 181 of drive motor 18, and the circumferential outer surface of the rod 121 is opened to have the connecting port 1213, and the rod 121 is equipped with slide hole 1212, and the connecting port 1213 is communicated with slide hole 1212, and the slide hole 1212 is slidably connected with the slide bar 122, and the circumferential outer surface of the slide bar 122 is opened to have extrusion groove 1221 in the position corresponding connecting port 1213, and the connecting port 1213 is slidably connected with the flap 123, and the bottom of flap 123 is equipped with sliding block 1232, and sliding block 1232 is clamped in extrusion groove 1221, and one side of flap 123 is equipped with the material digging surface 1231, and the top of flap 123 is equipped with the shovel plate 1233, and one side of shovel plate 1233 is equipped with the cutting surface 1234, and the one end of flap 123 outside connecting port 1213 is kept 5~10mm apart from the inner wall of main part 1 in normal state, and the inclined surface of material digging surface 1231 and the inner wall of main part 1 form groove, for driving wet sludge to be coated on the inner wall of main part 1, and the cutting surface 1234 of shovel plate 1233 keeps infinitely close to the inner wall of main part 1 in normal state, for pushing sludge forward in the cleaning process.

[0034] By adopting the above technical scheme, sludge is input into main part 1 through feed inlet 14, drive motor 18 drives transmission shaft 181 to rotate rod 121, drives slide bar 122 and flap 123 to rotate synchronously. Flap 123 uniformly coats sludge on the inner wall of main part 1 to form a thin layer by means of the inclined surface of material digging surface 1231, realizes indirect heat exchange between sludge and heat medium in interlayer 11 to dry sludge. After completing one coating, feeding is paused. Extension rod one 127 pushes slide bar 122, moves flap 123 up and down through extrusion groove 1221, simultaneously, extension rod two 128 pulls rod 121, drives flap 123 and shovel plate 1233 to move away from the inner wall, cleans and pushes sludge to the next coating area. Then, extension rod one 127 and extension rod two 128 act reversely, reset flap 123, continue feeding and coating process. The process is circularly carried out, realizes segmented thin layer drying treatment, and finally dried sludge is discharged through discharge outlet 16.

[0035] The main body 1 is provided with a sandwich layer 11 in the wall, the outer wall of the main body 1 is provided with a heat exchange port 111 connected with the sandwich layer 11, which is used for injecting heat medium to realize heat exchange, the bottom of the main body 1 is provided with a drainage port 112 connected with the sandwich layer 11, which is used for discharging the condensed liquid in the sandwich layer 11, the top of one end of the main body 1 close to the tail pipe 13 is provided with a feeding port 14, the bottom of the main body 1 close to the driving motor 18 is provided with a discharging port 16, and the top of the main body 1 close to the driving motor 18 is provided with an exhaust port 15 connected with an external fan.

[0036] By adopting the above technical scheme, the exhaust port 15 is used for connecting the external fan, the water vapor evaporated from the sludge is extracted from the main body 1 through the exhaust port 15 by the fan, the main body 1 is provided with a sandwich layer 11 in the wall, the outer wall of the main body 1 is provided with a heat exchange port 111 connected with the sandwich layer 11, heat medium is injected into the sandwich layer 11 through the heat exchange port 111 to realize heat exchange between the wet sludge and the heat medium, and the bottom of the main body 1 is provided with a drainage port 112 connected with the sandwich layer 11 of the main body 1, which is used for discharging the condensed liquid in the sandwich layer 11.

[0037] The circumferential outer surface of one end of the rotating rod 121 close to the tail pipe 13 is provided with a limiting ring 1215, the inside of one end of the rotating rod 121 close to the tail pipe 13 is rotationally connected with a connecting head 126, the circumferential outer surface of the rotating rod 121 close to the limiting ring 1215 is provided with a limiting clamping groove 1214, the inside of the limiting clamping groove 1214 is rotationally connected with a sealing plate 124, the sealing plate 124 is slidingly connected with the inner wall of the main body 1, the outer wall of the limiting ring 1215 is rotationally connected with a connecting block 125, one end of the sealing plate 124 is fixedly connected with the connecting block 125, the end of the sealing plate 124 is slidingly connected with the inner wall of the limiting groove 131, the inside of the connecting block 125 is provided with a telescopic rod one 127, the output end of the telescopic rod one 127 is fixedly connected with the connecting head 126, the inside of the tail pipe 13 is provided with a telescopic rod two 128, the output end of the telescopic rod two 128 is fixedly connected with the connecting block 125, one end of the rotating rod 121 close to the driving motor 18 is provided with a butt joint hole 1211, the output end of the driving motor 18 is provided with a transmission shaft 181, one end of the transmission shaft 181 extends into the butt joint hole 1211 and is slidingly connected.

[0038] By adopting the above technical scheme, the sealing plate 124 is slidingly connected with the inner wall of the main body 1, which is used for preventing the sludge and the internal gas from leaking while supporting the rotating rod 121, the telescopic rod one 127 and the telescopic rod two 128 cooperatively drive the sliding rod 122 and the rotating rod 121, so that the turning plate 123 and the shovel plate 1233 temporarily leave the inner wall and then reset, during which the cutting surface 1234 of the shovel plate 1233 removes the sludge on the inner wall to prevent adhesion, thereby ensuring the continuous and efficient operation of the equipment.

[0039] The application is used, the exhaust port 15 is used for connecting the external fan, the water vapor evaporated from the sludge is extracted from the main body 1 through the exhaust port 15 by the fan, the sandwich layer 11 is arranged in the wall of the main body 1, the heat exchange port 111 is arranged on the outer wall of the main body 1 and is communicated with the sandwich layer 11, the heat medium is injected into the sandwich layer 11 through the heat exchange port 111, the heat exchange between the wet sludge and the heat medium is realized, the drain port 112 is arranged at the bottom of the main body 1 and is communicated with the sandwich layer 11 of the main body 1, and is used for discharging the condensed liquid in the sandwich layer 11.

[0040] The scraper mechanism 12 is rotatably connected in the main body 1, one end of the main body 1 is provided with the driving motor 18, the other end of the main body 1 is provided with the tail pipe 13, the limiting groove 131 is arranged in the tail pipe 13 and is close to the main body 1, the feeding port 14 is arranged on the top of the main body 1 and is close to the tail pipe 13, the discharging port 16 is arranged on the bottom of the main body 1 and is close to the driving motor 18, and the supporting seat 17 is arranged on the bottom of the main body 1.

[0041] The scraper mechanism 12 comprises the rotating rod 121 rotatably arranged in the main body 1, the rotating rod 121 is provided with the butt joint hole 1211 at one end close to the driving motor 18, the driving motor 18 is fixedly connected with the transmission shaft 181 at the output end, the transmission shaft 181 extends into the butt joint hole 1211, the transmission shaft 181 is slidably connected with the inner wall of the butt joint hole 1211, the inner wall of the butt joint hole 1211 is non-circular, the outer wall of the transmission shaft 181 is matched with the inner wall of the butt joint hole 1211, the rotating rod 121 is provided with the sliding hole 1212 in the inside, a plurality of connecting openings 1213 are uniformly arranged on the circumferential outer surface of the rotating rod 121, the connecting openings 1213 are communicated with the sliding hole 1212, the sliding rod 122 is slidably connected in the sliding hole 1212, the extrusion groove 1221 is arranged on the circumferential outer surface of the sliding rod 122 and is corresponding to the position of the connecting opening 1213, the flap 123 is slidably connected in the connecting opening 1213, the sliding block 1232 is arranged on the bottom of the flap 123 and is clamped in the extrusion groove 1221 and is slidably connected with the inner wall of the extrusion groove 1221, the flap 123 is spaced apart from the inner wall of the main body 1 by 5-10mm in the normal state at one end outside the connecting opening 1213, the inclined material digging surface 1231 is arranged on one side of the flap 123 and is close to the inner wall of the main body 1, the shovel plate 1233 is arranged on the top of the flap 123 and is close to one side of the driving motor 18, the cutting surface 1234 is arranged on one side of the shovel plate 1233 and is close to the driving motor 18, and the cutting surface 1234 keeps close to the inner wall of the main body 1 in the normal state.

[0042] The outer circumferential surface of the rotating rod 121 near one end of the tail pipe 13 is provided with a limiting ring 1215, and the inner part of the rotating rod 121 near one end of the tail pipe 13 is rotatably connected with a connecting head 126. The outer circumferential surface of the rotating rod 121 near the position of the limiting ring 1215 is provided with a limiting clamping groove 1214, and the inner part of the limiting clamping groove 1214 is rotatably connected with a sealing plate 124. The sealing plate 124 is slidably connected with the inner wall of the main body 1. The outer wall of the limiting ring 1215 is rotatably connected with a connecting block 125. One end of the sealing plate 124 is fixedly connected with the connecting block 125. The end of the sealing plate 124 is slidably connected with the inner wall of the limiting groove 131. The inner part of the connecting block 125 is provided with an extension rod one 127. The output end of the extension rod one 127 is fixedly connected with the connecting head 126. The inner part of the tail pipe 13 is provided with an extension rod two 128. The output end of the extension rod two 128 is fixedly connected with the connecting block 125.

[0043] In use, the sludge is transported into the main body 1 through the feeding port 14. Then the driving motor 18 drives the rotating rod 121 to rotate through the transmission shaft 181. The rotating of the rotating rod 121 drives the sliding rod 122 and the turning plate 123 to rotate. The rotation of the turning plate 123 drives the wet sludge through the inclined surface of the material digging surface 1231 to be coated on the inner wall of the main body 1. The wet sludge is evenly formed into a thin layer on the inner wall of the main body 1. A groove is formed between the inclined surface of the material digging surface 1231 and the inner wall of the main body 1, so as to drive more wet sludge. In this process, the wet sludge and the heat medium in the clamping layer 11 realize indirect heat exchange, so as to achieve the purpose of drying the wet sludge.

[0044] When the turning plate 123 rotates a circle to coat the wet sludge, the feeding port 14 stops feeding, the telescopic rod one 127 pushes the slide rod 122 through the output end, pushes the slide rod 122 to extrude the sliding block 1232 at the bottom of the turning plate 123, the turning plate 123 is limited by the connecting port 1213 and can only move up and down, and when extruded by the inclined surface of the extrusion groove 1221, the turning plate 123 moves to the inside of the slide rod 122, so that the turning plate 123 and the shovel plate 1233 move away from the inner wall of the main body 1 by a distance, and the telescopic rod two 128 pulls the rotating rod 121 through the connecting block 125 and the sealing plate 124, and pulls the rotating rod 121 to move a distance equal to the total length of the turning plate 123 and the shovel plate 1233, and then the telescopic rod one 127 pulls the slide rod 122, and the inclined surface of the extrusion groove 1221 drives the turning plate 123 and its components to move outward, so that the turning plate 123 returns to the position of the same distance from the inner wall of the main body 1 again, and then the telescopic rod two 128 pushes the rotating rod 121 to move back to the original position through the connecting block 125 and the sealing plate 124. The pushing process can clean the sludge on the inside of the main body 1 through the cutting surface 1234 of the shovel plate 1233, and push the sludge forward to the next turning plate 123 coating process in the process of cleaning the sludge. When the rotating rod 121 returns to the original position, the feeding port 14 continues to feed, and then the turning plate 123 continues to rotate to drive the wet sludge through the digging surface 1231 to coat the sludge on the inner wall of the main body 1. The wet sludge forms a thin layer on the inner wall of the main body 1, and then the previous steps are continued to dry the wet sludge by segmenting the thin layer, and finally the sludge is discharged through the discharge port 16.

[0045] The digging surface 1231 of the turning plate 123 uniformly coats the sludge on the inner wall of the main body 1 to form a thin layer, significantly expands the contact surface of the sludge and the heat medium, improves the heat conduction efficiency and the water evaporation speed, realizes the rapid drying of the sludge, shortens the cycle, and reduces the energy consumption.

[0046] After the turning plate 123 rotates, the telescopic rod one 127 and the telescopic rod two 128 cooperatively drive the slide rod 122 and the rotating rod 121 to make the turning plate 123 and the shovel plate 1233 temporarily away from the inner wall and then reset, and during the period, the cutting surface 1234 of the shovel plate 1233 removes the sludge on the inner wall to prevent adhesion and ensure the continuous and efficient operation of the equipment.

[0047] The turning plate 123 continuously rotates, the shovel plate 1233 pushes the sludge to dry and move forward, and at the same time, space is created for new sludge coating, which ensures the continuous and efficient sludge treatment.

[0048] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A sludge thermal drying mechanism, comprising a main body (1), characterized in that: The main body (1) is rotatably connected to a scraper mechanism (12), a drive motor (18) is provided at one end of the main body (1), and a tail tube (13) is provided at the other end of the main body (1). A limit groove (131) is provided inside the tail tube (13) near the main body (1). The scraper mechanism (12) includes a rotating rod (121) rotatably installed inside the main body (1). One end of the rotating rod (121) is slidably connected to the transmission shaft (181) of the drive motor (18). A connection port (1213) is provided on the outer circumference of the rotating rod (121). A sliding hole (1212) is provided inside the rotating rod (121). The connection port (1213) is connected to the sliding hole (1212). A sliding rod (122) is slidably connected inside the sliding hole (1212). An extrusion groove (1221) is provided on the outer circumference of the sliding rod (122) at the position corresponding to the connection port (1213). A flap (123) is slidably connected inside the connection port (1213). A slider (1232) is provided at the bottom of the flap (123). The slider (1232) is locked in the extrusion groove (1221). A digging surface (1231) is provided on one side of the flap (123). A shovel (1233) is provided at the top of the flap (123). A cutting surface (1234) is provided on one side of the shovel (1233). In this configuration, the flap (123) located outside the connection port (1213) is normally 5-10 mm away from the inner wall of the main body (1). The inclined surface of the excavation surface (1231) forms a groove with the inner wall of the main body (1), which is used to drive the wet sludge to be coated on the inner wall of the main body (1). The cut surface (1234) of the shovel plate (1233) is kept infinitely close to the inner wall of the main body (1) in normal state, which is used to push the sludge forward during the cleaning process. The outer circumference of the rotating rod (121) near the tail pipe (13) is provided with a limiting ring (1215). The inner circumference of the rotating rod (121) near the tail pipe (13) is rotatably connected to a connector (126). The outer circumference of the rotating rod (121) is close to the limiting ring (1215). A limiting slot (1214) is provided at the position, and a sealing plate (124) is rotatably connected inside the limiting slot (1214). The sealing plate (124) is slidably connected to the inner wall of the main body (1). A connecting block (125) is rotatably connected to the outer wall of the limiting ring (1215). One end of the sealing plate (124) is fixedly connected to the connecting block (125). The end of the sealing plate (124) is slidably connected to the inner wall of the limiting groove (131). A telescopic rod one (127) is provided inside the connecting block (125). The output end of the telescopic rod one (127) is fixedly connected to the connector (126). A telescopic rod two (128) is provided inside the tail tube (13). The output end of the telescopic rod two (128) is fixedly connected to the connecting block (125).

2. The sludge thermal drying mechanism according to claim 1, characterized in that: The main body (1) has an inner layer (11) and an outer wall of the main body (1) with a heat exchange port (111) connected to the inner layer (11) for injecting heat medium to achieve heat exchange. The bottom of the main body (1) has a drain port (112) connected to the inner layer (11) for draining the condensate inside the inner layer (11).

3. The sludge thermal drying mechanism according to claim 1, characterized in that: The main body (1) has a feed inlet (14) at the top of one end near the tail pipe (13), a discharge outlet (16) at the bottom of the main body (1) near the drive motor (18), and an exhaust outlet (15) at the top of the main body (1) near the drive motor (18) for connecting to an external fan to extract water vapor from the sludge.

4. The sludge thermal drying mechanism according to claim 1, characterized in that: The rotating rod (121) has a docking hole (1211) at one end near the drive motor (18), and the output end of the drive motor (18) is provided with a transmission shaft (181). One end of the transmission shaft (181) extends into the docking hole (1211) and is slidably connected.

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