A sludge low-temperature drying and medium-temperature carbonization linkage device and method

Abstract

The application discloses a sludge low-temperature drying and medium-temperature carbonization linkage device and method, relates to the technical field of sludge treatment, and is used for solving the problem that sludge granulation needs to be additionally performed, carbonization process cannot be rapidly performed after sludge drying, and the overall efficiency of sludge treatment is reduced; the application sets the drying tank used by the sludge and the rotary kiln on the bed, performs guided replacement by using the heat generated during preheating and temperature rising of the rotary kiln, discharges the high-temperature airflow into the drying tank under the work of the material control box and the heat exchanger, then extrudes and discharges the sludge into the overturning drying cylinder by rotating the fan blades in the material winding cylinder, realizes rapid drying of the sludge, finally adjusts the top material mechanism, drives the overturning drying cylinder to rotate and shake left and right at the same time, and automatically discharges the material to make the formed and dried sludge fall into the drying tank when the holes of the rotary disc outer cover are coincident, so that the sludge enters the rotary kiln along the slag outlet, and the rotary kiln is accompanied by temperature rising and ends, and then performs subsequent sludge carbonization treatment.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a combined device and method for low-temperature drying and medium-temperature carbonization of sludge. Background Technology

[0002] The sludge low-temperature drying equipment mainly utilizes a closed-loop hot air circulation condensation process to dry sludge at low temperatures, effectively improving drying efficiency and reducing energy consumption. At the same time, it adopts heat pump heating technology, heat recovery and utilization technology, and gradient heating and cooling technology to achieve stabilization, harmlessness and volume reduction of sludge.

[0003] Sludge carbonization technology involves heating and pressurizing sludge in carbonization equipment under anaerobic or micro-aerobic conditions to "dry-dry" it, causing the cells in the sludge to break down and release water, while retaining the carbon value of the sludge to the maximum extent. The organic matter in the sludge is stable after carbonization and can be widely used for many purposes such as adsorption and deodorization, sewage filtration, environmentally friendly snow melting agent, fuel, soil improvement and activated carbon.

[0004] Typically, sludge carbonization requires drying treatment in the early stages to control the moisture content of the sludge again. The process produces oil, reaction water (steam condensate), biogas (uncondensed air), and solid carbonaceous materials, which can reduce the volume and utilize the resources of sludge. Then, it is transferred to the sludge carbonization workshop to start pyrolysis, removing the remaining water from the sludge and turning it into carbon particles. Therefore, sludge granulation treatment must be carried out in the early stage of the process to facilitate rapid heating, transfer, and later use of sludge. At the same time, sludge drying and carbonization equipment are mostly carried out in steps, which can easily lead to a decrease in the overall sludge processing rate.

[0005] Therefore, we propose a combined device and method for low-temperature drying and medium-temperature carbonization of sludge. Summary of the Invention

[0006] The purpose of this invention is to provide a sludge low-temperature drying and medium-temperature carbonization linkage device and method to solve the problems mentioned in the background art, which require additional sludge granulation and cannot quickly carry out carbonization after sludge drying, resulting in a reduction in the overall efficiency of sludge treatment.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a sludge low-temperature drying and medium-temperature carbonization linkage device, comprising a bed and a placement frame, wherein the top of the bed is fixed to the placement frame by bolts, a drying tank is fixedly connected to the placement frame by a bracket, a turntable is movably connected to the drying tank, a movable disc is sleeved and fixedly mounted on one side of the turntable through one side of the drying tank, and abutment columns are symmetrically fixed to one side of the turntable by spot welding, and a tilting drying cylinder is slidably connected to the drying tank and located on the abutment columns;

[0008] The bottom of the rotating drying cylinder is provided with a slag outlet. A material control box is connected and fixed on one side of the slag outlet and on the placement frame. A heat exchanger is installed on one side of the material control box. A connecting pipe is connected to the bottom of the material control box. A rotary kiln is movably connected to the top of the bed and on one side of the connecting pipe. A slag discharge box is installed on one side of the bed and is movably connected to one side of the rotary kiln.

[0009] Furthermore, a roll of material is fixedly connected to the placement frame and located on one side of the drying tank. One side of the roll of material passes through the turntable and the rotating drying cylinder and is movably connected to the inner wall of the drying tank. A sludge sleeve is movably fitted on the rotating drying cylinder and located on the outer wall of the roll of material. Holes are evenly opened on the outer wall of the roll of material on the side of the sludge sleeve. A roll of material fan blade is installed inside the roll of material and is connected to the motor output end on the placement frame.

[0010] Furthermore, the turntable side cover abuts against the outer wall of the rotating drying cylinder, the turntable side cover and the holes on the rotating drying cylinder are alternately arranged, and a return spring is sleeved and installed on the opposite side of the turntable and the rotating drying cylinder and on the outer wall of the coil.

[0011] Furthermore, a top-feeding mechanism is installed on the inner wall of the drying tank. The top-feeding mechanism includes an air chamber, a piston disc, and a top column. An air chamber is fixed to one side of the inner wall of the drying tank by bolts. A piston disc is slidably connected in the air chamber. A top column is fixedly connected to one side of the piston disc. One end of the top column passes through one side of the air chamber and extends into the drying tank. A vent pipe is connected to one side of the air chamber.

[0012] Furthermore, the inner wall of the drying tank is rotatably connected to a limiting sleeve plate via a bearing, one end of the top column abuts against one side of the limiting sleeve plate, and one side of the tilting drying cylinder protrudes against the other side of the limiting sleeve plate.

[0013] Furthermore, a sealing body is movably connected inside the material control box. A through groove is provided on the sealing body. One side of the through groove is connected to the slag outlet, and the other side of the through groove is connected to the connecting pipe.

[0014] Furthermore, one side of the heat exchanger is connected to and fixed with an insulation pipe, and the other end of the insulation pipe passes through the drying tank and is connected to the coil drum.

[0015] The combined low-temperature drying and medium-temperature carbonization method for this sludge is as follows:

[0016] The drum preheating and drying process preheats the rotary kiln and simultaneously rotates the sealing body inside the material control box so that the groove of the sealing body faces the connecting pipe and the heat exchanger. The preheating process heats the air inside the rotary kiln, and the hot airflow enters the heat exchanger along the sealing body. The high-temperature gas heats the water inside the heat exchanger, and the vaporized airflow heats the air around the heat exchanger. Then, the air is heated to 80°C and blown into the drying tank along the insulation pipe by a blower.

[0017] High-temperature airflow is discharged into the rotating drying drum through the air holes on the roll drum. Then, the sludge is discharged into the roll drum from the side of the feed pipe. The rotating fan blades continuously push the sludge to move, and finally squeeze it out from the side of the sludge sleeve and fall into the rotating drying drum. At the same time, the rotating movable disc drives the turntable to rotate, so that the entire rotating drying drum drives the strip sludge to rotate and dry.

[0018] High-temperature carbonization of the discharged material is achieved by increasing the pressure inside the air chamber by venting air into the vent pipe. The piston disc pushes the top column to contact the limiting sleeve plate. As the limiting sleeve plate rotates, it changes the rotation trajectory of the tilting drying cylinder, causing the holes on the outer cover of the turntable to overlap with the holes on the tilting drying cylinder. This cuts the strip-shaped sludge and discharges it into the bottom of the drying tank. Finally, it is discharged into the material control box through the slag outlet. The pre-rotated sealing block makes the through groove face the connecting pipe and the drying tank. Then, the sludge enters the rotary kiln through the connecting pipe and undergoes carbonization treatment at 850°C during rotation. The carbonized sludge is finally discharged from the slag discharge box side.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In this invention, the sludge drying tank and rotary kiln are placed on the landing bed. The heat generated during the preheating of the rotary kiln is used for guiding and displacement. Under the operation of the material control box and heat exchanger, the high-temperature airflow is discharged into the drying tank to create a dry environment. Then, the sludge is squeezed into the rotating drying cylinder by the rotation of the fan blades inside the material winding drum. The sludge sleeve limits the shape of the sludge during extrusion, which increases the area of ​​the sludge that is heated and dried. With the rotation of the rotating drying cylinder, the sludge is dried quickly. Finally, the top material mechanism is adjusted to drive the rotating drying cylinder to rotate and sway left and right. When the holes of the outer cover of the turntable overlap, the material is automatically discharged, so that the shaped and dried sludge falls into the drying tank and finally enters the rotary kiln through the slag outlet. With the rotation of the rotary kiln after the heating is completed, the sludge undergoes subsequent carbonization treatment, realizing energy recovery and utilization, while accelerating the entire process of sludge from drying to carbonization and improving the overall sludge treatment efficiency.

[0021] 2. In this invention, the air pressure of the air chamber is controlled by the air pipe, which drives the limit sleeve to rotate while the rotating drying drum rotates to crush the sludge inside the drum, thus avoiding uneven carbonization of the sludge particles that subsequently enter the rotary kiln.

[0022] 3. In this invention, by controlling the rotation of the sealed body inside the material control box, the high-temperature gas is intercepted and accurately transported, avoiding the sludge from being dehydrated too early in the drying tank due to the gradually increasing airflow, which would affect the overall carbonization uniformity of the sludge in the subsequent rotary kiln. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the sludge low-temperature drying and medium-temperature carbonization linkage device of the present invention.

[0024] Figure 2 This is a schematic diagram of the connection structure between the drying tank and the coil of the present invention;

[0025] Figure 3 This is a schematic diagram of the main cross-sectional structure of the drying tank of the present invention;

[0026] Figure 4 This is a schematic diagram of the overall structure of the feeding mechanism of the present invention;

[0027] Figure 5 This is a schematic diagram of the sludge drying end discharge into the connecting pipe structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the rotary kiln preheating airflow entering the heat exchanger according to the present invention.

[0029] In the diagram: 1. Bed placement; 2. Placement rack; 3. Drying tank; 4. Roller drum; 5. Feed pipe; 6. Movable disc; 7. Turntable; 8. Abutment column; 9. Tilting drying drum; 10. Return spring; 11. Sludge sleeve; 12. Top material mechanism; 121. Air chamber; 122. Piston disc; 123. Top column; 124. Vent pipe; 13. Slag outlet; 14. Limiting sleeve; 15. Insulation pipe; 16. Material control box; 17. Sealing body; 18. Through groove; 19. Heat exchanger; 20. Connecting pipe; 21. Rotary kiln; 22. Slag discharge box. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-6 The present invention provides a technical solution:

[0032] Sludge is a solid waste generated during wastewater treatment. It is characterized by high moisture content, high organic matter content, and high nutrient content, causing serious pollution to the environment. Traditional sludge treatment methods mainly include landfilling, incineration, and composting. Before subsequent sludge treatment, the moisture content of the sludge is controlled.

[0033] like Figure 1 and Figure 2As shown, the sludge is pre-treated by centrifugation or filter pressing to dewater it, and then discharged into the drying tank 3 from the feed pipe 5 on the side of the drying tank 3 on the placement rack 2. The sludge moving fan blade is installed in the roll 4 connected to the drying tank 3. The motor drives the fan blade to rotate and move the sludge discharged into the feed pipe 5 into the drying tank 3. At the same time, a movable disc 6 is movably connected to the outside of the drying tank 3, which is also rotated by the motor driving the belt to move.

[0034] like Figure 3 As shown, one side of the entire coil 4 is fixed to the inner wall of the drying tank 3, while the fan blades inside the coil 4 are movably connected. The movable disc 6 is located inside the drying tank 3 and connected to the turntable 7. The abutment column 8, which is symmetrically fixed on the side of the turntable 7, is slidably sleeved with the tilting drying cylinder 9. At the same time, the outer cover of the turntable 7 abuts against the tilting drying cylinder 9. Holes are opened between the two and are alternately arranged, so that the sludge inside the tilting drying cylinder 9 cannot be discharged normally. When the tilting drying cylinder 9 and the outer cover of the turntable 7 are deflected and misaligned, the sludge can be discharged from the tilting drying cylinder 9 through the overlapping holes between the two.

[0035] To accelerate the sludge drying rate and achieve sludge granulation, the contact area between the sludge and the heating components is usually increased. However, this invention uses the rotation of the fan blades to drive the sludge to move and intercepts it during the movement process, causing the sludge to be squeezed and discharged from the side of the sludge sleeve 11. The sludge squeezed into strips is continuously discharged from the winding drum 4 and the side hole of the sludge sleeve 11 and enters the turning drying drum 9.

[0036] Meanwhile, a heat-insulating pipe 15 is connected to the other side of the roll drum 4. The rotary kiln 21 generates heat, and the heated air enters the roll drum 4 through the heat-insulating pipe 15, thus completing the heating of the entire rotating drying drum 9. The drying temperature of the entire sludge in the rotating drying drum 9 is usually controlled at 80°C. At the same time, the motor drives the movable disc 6 to rotate, and the rotating drying drum 9 on the turntable 7 rotates at the same time. The sludge in the rotating drying drum 9 is continuously turned and completes the subsequent drying and dewatering work.

[0037] like Figure 5 As shown, a material control box 16 is connected to the slag outlet 13 at the bottom of the drying tank 3. A sealing body 17 is movably connected inside the material control box 16. The sealing body 17 is a sphere, and there is a "T"-shaped through groove 18 inside the sphere. The rotation of the motor drives the sealing body 17 to rotate, changing the orientation of the through groove 18 of the entire sealing body 17.

[0038] When heat transfer is required, hot air located inside the rotary kiln 21 travels along the connecting pipe 20 to the material control box 16, such as... Figure 6 As shown, at this time, the through groove 18 of the sealing body 17 faces to the right and down, and the high temperature gas is discharged into the heat exchanger 19 through the material control box 16;

[0039] In the heat exchanger 19, water is first heated, and the high-temperature water vapor generated heats the air inside the heat exchanger 19 along the pipeline. Then, the heated air is sent into the turning drying drum 9 along the insulation pipe 15 by the blower to heat and dry the sludge.

[0040] After the sludge drying process is completed, a large amount of dried sludge remains in the tilting drying drum 9, ready to be discharged. The top material mechanism 12 inside the drying tank 3 is then activated. Figure 4 As shown, the main body of the entire top material mechanism 12 is an air chamber 121. A piston disc 122 is slidably connected inside the air chamber 121. A top column 123 is fixedly connected to one side of the piston disc 122, which passes through the air chamber 121 and abuts against the rotating limiting sleeve 14 inside the drying tank 3. At the same time, the protrusion on the side of the flip drying cylinder 9 abuts against the other side of the limiting sleeve 14.

[0041] When the rotating drying cylinder 9 rotates normally, the protrusion on the rotating drying cylinder 9 contacts the vertical limiting sleeve 14 and rotates smoothly. When air enters through the air pipe 124 on the other side of the air chamber 121, it changes the pressure on one side of the entire air chamber 121, pushing the entire piston disc 122 to move and simultaneously pushing the limiting sleeve 14 to rotate clockwise by a certain angle. As the rotating drying cylinder 9 squeezes the single-sided reset spring 10, the material will slide left and right on the coil 4 due to the push of the reset spring 10 during the rotation of the rotating drying cylinder 9.

[0042] As the rotating drying cylinder 9 slides left and right, it overlaps with the holes on the cover of the turntable 7. Strips of dried sludge continuously fall down to the bottom of the drying tank 3 through the holes. At the same time, the left and right movement of the rotating drying cylinder 9 can also break up long strips of sludge, ensuring that the particles between the sludge are uniform. With the left and right movement of the rotating drying cylinder 9, the dried sludge is discharged into the material control box 16 through the slag outlet 13 at the bottom of the drying tank 3. Before the discharge, the motor drives the entire sealing body 17 to rotate in the material control box 16, so that the through groove 18 faces the upper and lower sides. At this time, the sludge falling from the slag outlet 13 will enter the connecting pipe 20 through the through groove 18. The connecting pipe 20 is movably connected to the rotary kiln 21. Then the sludge rolls into the rotary kiln 21 for high-temperature carbonization treatment.

[0043] By setting the sludge drying tank 3 and rotary kiln 21 on the bed 1, the heat generated during the preheating of the rotary kiln 21 is used for guiding and displacement. Under the operation of the material control box 16 and heat exchanger 19, the high-temperature airflow is discharged into the drying tank 3 to create a dry environment. Then, the sludge is squeezed and discharged into the turning drying cylinder 9 by the rotation of the fan blades in the material roll 4. The sludge sleeve 11 limits the shape of the sludge during extrusion, which increases the heat-drying area of ​​the sludge. With the rotation of the turning drying cylinder 9, the sludge is dried quickly.

[0044] Finally, the top material mechanism 12 is adjusted to drive the rotating drying drum 9 to rotate and sway left and right. When the holes on the outer cover of the turntable 7 overlap, the material is automatically discharged, causing the shaped and dried sludge to fall into the drying tank 3. Finally, it enters the rotary kiln 21 through the slag outlet 13. The rotary kiln 21, which is rotating after the heating is completed, performs subsequent sludge carbonization treatment to achieve energy recovery and utilization. At the same time, it accelerates the entire sludge process from drying to carbonization and improves the overall sludge treatment efficiency.

[0045] like Figure 1 As shown, the rotary kiln 21 is located on the bed 1 and connected to the slag discharge box 22. The high temperature generated by the flame gun on the side of the slag discharge box 22 comes into the connecting pipe 20 through the rotary kiln 21. As the rotary kiln 21 rotates, the sludge blocks are continuously heated and dehydrated during the rolling process. The carbonization temperature is controlled at 850℃. Finally, the carbonized sludge is discharged from the side of the slag discharge box 22, completing the combined treatment of sludge drying and carbonization.

[0046] The working process and principle of this invention are as follows:

[0047] The drum preheating and drying process preheats the rotary kiln 21. At the same time, the sealing body 17 inside the material control box 16 is rotated so that the through groove 18 of the sealing body 17 faces the connecting pipe 20 and the heat exchanger 19. The preheating process heats the air inside the rotary kiln 21. The hot air flows into the heat exchanger 19 along the sealing body 17. The high-temperature gas heats the water inside the heat exchanger 19. At the same time, the vaporized air heats the air around the heat exchanger 19. Then the air is heated to 80°C and blown into the drying tank 3 along the insulation pipe 15 by a blower.

[0048] High-temperature airflow is discharged into the rotating drying drum 9 through the air hole on the roll drum 4. Then, the sludge is discharged into the roll drum 4 from the side of the feed pipe 5. The rotating fan blades continuously push the sludge to move, and finally squeeze it out from the side of the sludge sleeve 11 and fall into the rotating drying drum 9. At the same time, the rotating movable disc 6 drives the turntable 7 to rotate, so that the entire rotating drying drum 9 drives the strip sludge to rotate and dry.

[0049] High-temperature carbonization of the discharged material is achieved by increasing the pressure in the air chamber 121 by venting the air into the vent pipe 124. The piston disc 122 pushes the top column 123 to contact the limiting sleeve 14. As the limiting sleeve 14 rotates, it changes the rotation trajectory of the rotating drying cylinder 9, causing the holes on the outer cover of the turntable 7 to overlap with the holes on the rotating drying cylinder 9, thus cutting off the strip-shaped sludge and discharging it into the bottom of the drying tank 3. Finally, it is discharged into the material control box 16 through the slag outlet 13. The pre-rotated sealing block causes the through groove 18 to face the connecting pipe 20 and the drying tank 3. Then, the sludge enters the rotary kiln 21 through the connecting pipe 20 and undergoes carbonization treatment at 850°C during rotation. The carbonized sludge is finally discharged from the side of the slag discharge box 22.

[0050] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A combined low-temperature drying and medium-temperature carbonization device for sludge, comprising a bed (1) and a placement frame (2), wherein the top of the bed (1) is fixed to the placement frame (2) by bolts, characterized in that, A drying tank (3) is fixedly connected to the placement rack (2) by a bracket. A turntable (7) is movably connected to the drying tank (3). A central axis of one side of the turntable (7) passes through one side of the drying tank (3) and a movable disc (6) is sleeved and fixed thereon. Abutment column (8) is symmetrically fixed to one side of the turntable (7) by spot welding. A flip drying cylinder (9) is slidably connected to the drying tank (3) and located on the abutment column (8). The bottom of the rotating drying cylinder (9) is provided with a slag outlet (13). A material control box (16) is connected and fixed on one side of the slag outlet (13) and on the placement frame (2). A heat exchanger (19) is installed on one side of the material control box (16). A connecting pipe (20) is connected to the bottom of the material control box (16). A rotary kiln (21) is movably connected to the top of the bed (1) and on one side of the connecting pipe (20). A slag discharge box (22) is installed on one side of the bed (1), and the slag discharge box (22) is movably connected to one side of the rotary kiln (21). A roll drum (4) is fixedly connected to the placement frame (2) and located on one side of the drying tank (3). One side of the roll drum (4) passes through the turntable (7) and the rotating drying drum (9) and is movably connected to the inner wall of the drying tank (3). A sludge sleeve (11) is movably fitted on the rotating drying drum (9) and located on the outer wall of the roll drum (4). Holes are evenly opened on the outer wall of the roll drum (4) on the side of the sludge sleeve (11). A roll fan blade is installed inside the roll drum (4) and is connected to the motor output end on the placement frame (2). The outer cover of the turntable (7) abuts against the outer wall of the rotating drying cylinder (9). The holes on the outer cover of the turntable (7) and the rotating drying cylinder (9) are alternately arranged. A return spring (10) is sleeved on the opposite side of the turntable (7) and the rotating drying cylinder (9) and located on the outer wall of the coil (4). The drying tank (3) is equipped with a top material mechanism (12) on its inner wall. The top material mechanism (12) includes an air chamber (121), a piston disc (122) and a top column (123). The air chamber (121) is fixed to one side of the inner wall of the drying tank (3) by bolts. The piston disc (122) is slidably connected in the air chamber (121). The top column (123) is fixedly connected to one side of the piston disc (122). One end of the top column (123) passes through one side of the air chamber (121) and extends into the drying tank (3). A vent pipe (124) is connected to one side of the air chamber (121). The inner wall of the drying tank (3) is rotatably connected to the limiting sleeve plate (14) via a bearing. One end of the top column (123) abuts against one side of the limiting sleeve plate (14), and one side of the flip drying cylinder (9) protrudes and abuts against the other side of the limiting sleeve plate (14).

2. The sludge low-temperature drying and medium-temperature carbonization combined device according to claim 1, characterized in that, The material control box (16) is movably connected to a sealing body (17), and a through groove (18) is provided on the sealing body (17). One side of the through groove (18) is connected to the slag outlet (13), and the other side of the through groove (18) is connected to the connecting pipe (20).

3. The sludge low-temperature drying and medium-temperature carbonization combined device according to claim 2, characterized in that, One side of the heat exchanger (19) is connected to a heat-insulating pipe (15), and the other end of the heat-insulating pipe (15) passes through the drying tank (3) and is connected to the coil (4).

4. A sludge low-temperature drying and medium-temperature carbonization combined device according to any one of claims 1-3, characterized in that, The combined low-temperature drying and medium-temperature carbonization method for this sludge is as follows: The rotary kiln (21) is preheated in advance by preheating the drum. At the same time, the sealing body (17) inside the material control box (16) is turned so that the through groove (18) of the sealing body (17) faces the connecting pipe (20) and the heat exchanger (19). The preheating heats the air inside the rotary kiln (21). The hot air flows into the heat exchanger (19) along the sealing body (17). The high temperature gas heats the water inside the heat exchanger (19). At the same time, the vaporized air heats the air around the heat exchanger (19). Then the air is heated to 80°C and blown into the drying tank (3) through the insulation pipe (15) by the blower. High-temperature airflow is discharged into the rotating drying drum (9) through the air hole on the roll drum (4). Then, the sludge is discharged into the roll drum (4) from the side of the feed pipe (5). The rotating fan blades continuously push the sludge to move, and finally squeeze it out from the side of the sludge sleeve (11) and fall into the rotating drying drum (9). At the same time, the rotating movable disc (6) drives the turntable (7) to rotate, so that the entire rotating drying drum (9) drives the strip sludge to rotate and dry. High-temperature carbonization of the discharged material is achieved by increasing the pressure in the air chamber (121) by venting the air into the vent pipe (124). The piston disc (122) pushes the top column (123) to contact the limiting sleeve plate (14). As the limiting sleeve plate (14) rotates, it changes the rotation trajectory of the turning drying cylinder (9), causing the holes on the outer cover of the turntable (7) to overlap with the holes on the turning drying cylinder (9), and cutting off the strip-shaped sludge before discharging it into the bottom of the drying tank (3). Finally, it is discharged into the material control box (16) along the slag outlet (13). The pre-rotated sealing block causes the through groove (18) to face the connecting pipe (20) and the drying tank (3). Then, the sludge enters the rotary kiln (21) along the connecting pipe (20) and is heated to 850°C for carbonization during rotation. The carbonized sludge is finally discharged from the slag discharge box (22).

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