Sludge drying device with high-energy ball milling function

Abstract

The invention belongs to the technical field of sludge drying, and particularly relates to a sludge drying device with a high-energy ball milling function, the sludge drying device comprises a box body and a heating box, two partition plates are arranged in the box body, the two partition plates divide the box body into a drying cavity, a blast cavity and a grinding cavity from top to bottom, the heating box is located on the partition plate located on the upper portion, and the blast cavity is located in the drying cavity. An air outlet is formed in the top of the heating box, two sets of conveying belts which are arranged up and down and opposite in conveying direction are arranged in the drying cavity, each conveying belt is composed of a chain wheel, a chain and a plurality of conveying nets, one end of each conveying net is fixed to the chain, and the other end of each conveying net is a free end. The sludge drying and grinding processes are integrated in the same device, the overall efficiency of sludge resource utilization is effectively improved, in addition, by arranging the cleaning assembly and the forming roller, the possibility of mesh blockage is effectively avoided, and the sludge drying efficiency and the sludge drying uniformity are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge drying, and in particular relates to a sludge drying device with a high-energy ball milling function. Background Art

[0002] Low-temperature sludge drying refers to a technology that achieves reduction and stabilization by reducing the moisture content of sludge under mild conditions of 40-70°C. The low-temperature sludge dryer includes a mesh belt dryer and a heat pump unit. Its core is to use the hot air produced by the heat pump unit to evaporate the water in the sludge. It has the advantages of energy saving, environmental protection, and safety. It is one of the current mainstream technical directions in the sludge drying field.

[0003] Existing patents such as CN119841529B disclose a sludge drying device, including a chassis. The sludge drying device replaces the original double-layer structure of the conveyor belt used to transport sludge with a single-layer conveyor net. There are no obstacles underneath the single-layer conveyor net, and high-temperature dry air can directly reach the single-layer conveyor net without being blocked by obstacles, thereby reducing the resistance of the high-temperature dry air before reaching the sludge position, reducing the energy consumption of the high-temperature dry air, and improving the sludge drying efficiency.

[0004] The existing device also has the following deficiencies:

[0005] 1. Sludge has a certain plasticity before drying. During the use of the above-mentioned sludge drying device, after the sludge falls from the feed port onto the conveyor net, the sludge in contact with the conveyor net enters the mesh under the action of gravity and the impact force when falling. During the sludge drying process, the sludge stuck in the mesh will stick to the mesh. When the sludge moves to the end of the conveyor belt, the sludge stuck in the mesh is difficult to fall off normally, resulting in mesh blockage, which in turn prevents the subsequent hot air from blowing from under the conveyor net to the sludge, affecting the sludge drying efficiency and uniformity.

[0006] 2. The existing sludge drying device forms large blocks or agglomerates after drying, which cannot be directly used for subsequent resource utilization. Additional equipment is required to grind the dried sludge. The overall process of sludge resource utilization is relatively complicated, the efficiency of sludge resource utilization is low, and the equipment cost is high.

[0007] 3. Sludge usually contains some magnetic impurities such as nails and nuts. These impurities have high hardness and are hidden inside the sludge. When the sludge is ball milled, these impurities will damage the ball mill equipment and affect the service life of the equipment. Summary of the Invention

[0008] The purpose of the present invention is to provide a sludge drying device with high-energy ball milling function in order to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned object, the present invention adopts the following technical solution: a sludge drying device with high-energy ball milling function, comprising:

[0010] The box body is provided with two partitions, which divide the box body into a drying chamber, a blast chamber and a grinding chamber from top to bottom;

[0011] A heating box is located on the upper partition, and an air outlet is provided on the top of the heating box;

[0012] The drying chamber is provided with two sets of conveyor belts arranged vertically and in opposite directions. The conveyor belts are composed of sprockets, chains and multiple conveyor nets. One end of the conveyor net is fixed to the chain, and the other end of the conveyor net is a free end. When the conveyor net moves below the conveyor belt, the conveyor net is in a vertical state under the action of gravity.

[0013] The blast chamber is provided with a plurality of blowers, and the air outlets of the plurality of blowers are all connected to the heating box. The airflow generated by the blast chamber is heated by the heating box and then blown toward the drying chamber;

[0014] A ball mill cylinder and a ball mill motor for driving the ball mill cylinder to rotate are arranged in the grinding chamber, and the ball mill motor and the ball mill cylinder are driven by gear reduction.

[0015] Furthermore, a feed port and an exhaust port are provided at the top of the drying chamber. A pair of forming rollers are provided in the feed port. The forming rollers are driven by a forming motor. After the sludge enters the feed port, it is squeezed and formed by the forming rollers and then falls onto the conveyor belt above.

[0016] Furthermore, a first receiving hopper is provided at the conveying end of the upper conveyor belt, and a pair of cutting rollers are provided in the first receiving hopper. The cutting rollers are driven by a cutting motor. The sludge on the upper conveyor belt falls into the first receiving hopper, is cut into strips, and then falls onto the lower conveyor belt.

[0017] Furthermore, a second receiving hopper is provided at the conveying end of the conveyor belt below, and the discharge port of the second receiving hopper is connected to the feed port of the ball mill through a feeding pipe.

[0018] Furthermore, a cleaning assembly for cleaning the conveyor net is provided in the drying chamber, and the cleaning assembly includes a support shaft fixed on the side wall of the box body, and an annular support seat is rotatably engaged on the support shaft, and a plurality of L-shaped plates distributed in an array and arranged obliquely are provided on the outer wall of the annular support seat, and the end of the L-shaped plate away from the annular support seat is comb-shaped.

[0019] Furthermore, the cleaning component also includes an annular groove opened on the annular support seat, and a plurality of wedge-shaped protrusions distributed in an array are provided on the side wall of the annular groove. A plurality of slide grooves are provided inside the support shaft, and a wedge-shaped slider adapted to the wedge-shaped protrusions is slidably fitted in the slide groove. A return spring is provided between the wedge slider and the bottom of the slide groove. When the conveyor net passes through the cleaning component, the comb teeth of the L-shaped plate pass through the mesh to pull the conveyor net, and shake the conveyor net with the cooperation of the wedge-shaped protrusions, the wedge slider and the return spring.

[0020] Furthermore, an impurity removal component is provided on the support shaft, and the impurity removal component includes a support rod fixed on the support shaft, a sleeve is provided on the outside of the support rod, and a plurality of fan-shaped grooves are opened on the outer wall of the sleeve. An electromagnet is embedded in the fan-shaped groove. When the sludge on the conveyor belt below is transported to the bottom of the electromagnet, the electromagnet removes magnetic impurities in the sludge.

[0021] Furthermore, the impurity removal component also includes a plurality of conductive columns fixed to the inner wall of the sleeve, the number and position of the conductive columns correspond one-to-one to the electromagnets, and an annular conductive sheet with which the conductive columns slide is fixed on the support rod, and the annular conductive sheet is provided with a notch. When the conductive column contacts the annular conductive sheet, the corresponding electromagnet is energized and has magnetism, and when the conductive column is in the notch of the annular conductive sheet, the corresponding electromagnet is de-energized.

[0022] Furthermore, a collecting frame is provided on the side wall of the box body, and an inclined material guide plate is provided in the drying chamber. After the electromagnet is powered off, the magnetic impurities adsorbed on it fall onto the material guide plate under the action of gravity and then slide into the collecting frame.

[0023] Compared with the existing technology, the advantages of the present invention are:

[0024] 1. The present invention integrates the sludge drying and grinding processes into the same device, effectively improving the overall efficiency of sludge resource utilization, eliminating the risk of dust pollution during material transfer, and reducing the equipment footprint. In addition, the present invention slices and cuts the sludge before grinding, so that the sludge is in a smaller size when entering the ball mill, which is conducive to improving the grinding efficiency and further improving the overall efficiency of sludge resource utilization.

[0025] 2. The present invention sets a cleaning component and a forming roller. The design of the forming roller makes the sludge structure denser and reduces the fluidity of the sludge, thereby reducing the possibility of the sludge penetrating into the mesh after falling onto the conveyor net. The cleaning component further cleans the conveyor net and removes the sludge penetrating into the mesh, effectively avoiding the possibility of mesh blockage and ensuring the sludge drying efficiency and uniformity of sludge drying.

[0026] 3. The present invention provides an impurity removal component, which can remove magnetic impurities (such as screws, nuts, etc.) in the sludge during the sludge drying process, thereby preventing the magnetic impurities from damaging the ball milling equipment during sludge ball milling and improving the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a sludge drying device with high-energy ball milling function provided by the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of a sludge drying device with high-energy ball milling function provided by the present invention from another angle;

[0029] Figure 3 This is a schematic diagram of the internal structure of a box of a sludge drying device with a high-energy ball milling function provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the overall top view of a sludge drying device with high-energy ball milling function provided by the present invention;

[0031] Figure 5 yes Figure 4 Cross-sectional view in the AA direction;

[0032] Figure 6 This is a schematic diagram of the internal structure of the feed port of a sludge drying device with high-energy ball milling function provided by the invention;

[0033] Figure 7 This is a schematic diagram of the internal structure of the first receiving hopper of a sludge drying device with high-energy ball milling function provided by the invention;

[0034] Figure 8 This is a schematic diagram of the conveying network structure of a sludge drying device with high-energy ball milling function provided by the invention;

[0035] Figure 9 This is a schematic diagram of the support shaft structure of a sludge drying device with high-energy ball milling function provided by the invention;

[0036] Figure 10 This is a schematic diagram of the structure of an annular support seat of a sludge drying device with high-energy ball milling function provided by the invention;

[0037] Figure 11 This is a schematic diagram of the cleaning component structure of a sludge drying device with high-energy ball milling function provided by the invention;

[0038] Figure 12 This is a schematic structural diagram of an impurity removal component of a sludge drying device with a high-energy ball milling function provided by the invention.

[0039] In the figure, 1 box, 11 partition, 12 drying chamber, 13 blast chamber, 14 grinding chamber, 15 heating box, 121 sprocket, 122 chain, 123 transmission network, 131 blower, 141 ball mill, 142 ball mill motor;

[0040] 1200 exhaust port, 1201 feed port, 1202 forming roller, 1203 forming motor, 1204 first receiving hopper, 1205 slitting roller, 1206 slitting motor, 1207 second receiving hopper, 1208 feeding pipe;

[0041] 21 support shaft, 22 annular support seat, 23 L-shaped plate, 24 annular groove, 241 wedge-shaped protrusion, 211 slide groove, 212 wedge-shaped slider, 213 return spring, 25 support rod, 251 sleeve, 253 electromagnet, 254 conductive column, 255 annular conductive sheet, 26 collection frame, 27 material guide plate. DETAILED DESCRIPTION

[0042] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0043] like Figures 1-12 As shown, a sludge drying device with high-energy ball milling function includes a box body 1 and a heating box 15. Two partitions 11 are provided in the box body 1. The partitions 11 are made of heat-insulating material. The two partitions 11 divide the box body 1 into a drying chamber 12, a blast chamber 13, and a grinding chamber 14 from top to bottom. The heating box 15 is located on the partition 11 at the top, and an air outlet is provided on the top of the heating box 15.

[0044] The blast chamber 13 is provided with a plurality of blowers 131, and the air outlets of the plurality of blowers 131 are all connected to the heating box 15. The airflow generated by the blast chamber 13 is heated by the heating box 15 and then blown toward the drying chamber 12.

[0045] A ball mill 141 and a ball mill motor 142 for driving the ball mill 141 are provided in the grinding chamber 14. A plurality of grinding balls are provided in the ball mill 141. A gear reduction transmission is used between the ball mill motor 142 and the ball mill 141. The discharge port of the ball mill 141 extends to the outside of the housing 1. The discharge port of the ball mill 141 is provided with a flange that can be connected to a conveying device to transport the dried and ground sludge to a designated location.

[0046] A feed port 1201 and an exhaust port 1200 are provided at the top of the drying chamber 12. The exhaust port 1200 is provided with a flange for connecting to exhaust gas treatment equipment. A pair of forming rollers 1202 are provided in the feed port 1201. The forming rollers 1202 are a pair of cylindrical rollers with a preset spacing. Specifically, they can be implemented by metal rollers with a chrome-plated surface. The forming rollers 1202 are driven by a forming motor 1203. After the sludge enters the feed port 1201, it is extruded and formed by the forming rollers 1202 and then falls onto the conveyor belt above.

[0047] During operation, after the sludge enters the feed port 1201, it is squeezed by the rotating shaping roller 1202 to form a sheet of uniform thickness. The shaped sludge has a dense structure and a smooth surface, which can reduce the dispersion of the sludge when it contacts the conveyor net 123 and reduce the possibility of unshaped sludge penetrating the mesh. In addition, shaping the sludge by the shaping roller 1202 can avoid local accumulation of sludge and make the sludge drying more uniform. The water vapor generated during the sludge drying process is discharged through the exhaust port 1200.

[0048] The drying chamber 12 is provided with two sets of conveyor belts arranged in an upper and lower direction and conveying in opposite directions. The conveyor belts are composed of sprockets 121, chains 122 and multiple conveyor nets 123. One end of the conveyor net 123 is fixed to the chain 122, and the other end of the conveyor net 123 is a free end. When the conveyor net 123 moves to the bottom of the conveyor belt, the conveyor net 123 is in a vertical state under the action of gravity.

[0049] A first receiving hopper 1204 is provided at the conveying end of the upper conveyor belt, and a pair of slitting rollers 1205 are provided in the first receiving hopper 1204. The slitting rollers refer to cylindrical components with cutting blades, which can be specifically implemented by metal rollers with spiral blades on the surface. The sludge is cut by rotating motion. The sludge on the upper conveyor belt falls into the first receiving hopper 1204 and is cut into strips and then falls onto the lower conveyor belt. In this embodiment, the two groups of conveyor belts are driven by forming rollers 1202 and slitting rollers 1205 respectively. Specifically, the driving shaft of the upper conveyor belt is connected to the forming rollers 1202 by a belt and pulley transmission, and the driving shaft of the lower conveyor belt is connected to the slitting rollers 1205 by a belt and pulley transmission.

[0050] During operation, the initially dried sludge falls from the end of the upper conveyor belt into the first receiving hopper 1204, is cut into strips by the strip-cutting roller 1205, and then falls onto the lower conveyor belt. This process, on the one hand, allows a larger surface area of ​​the sludge to be exposed to the hot air during the secondary drying stage, which is beneficial to improving the drying efficiency. On the other hand, cutting the sludge into smaller strips is more conducive to subsequent grinding. In addition, smaller sludge is lighter in weight and the magnetic impurities in it are easier to expose.

[0051] A second receiving hopper 1207 is provided at the conveying end of the lower conveyor belt, and the discharge port of the second receiving hopper 1207 is connected to the feed port of the ball mill 141 through a feeding pipe 1208;

[0052] During operation, the secondary dried sludge is transported to the end of the conveyor belt by the conveyor belt below, and then falls into the second receiving hopper 1207 under the action of gravity, and is then introduced into the ball mill 141 through the feeding pipe 1208;

[0053] The drying chamber 12 is provided with a cleaning assembly for cleaning the conveyor net 123. The cleaning assembly includes a support shaft 21 fixed to the side wall of the box body 1. The support shaft 21 is rotatably matched with an annular support seat 22. The outer wall of the annular support seat 22 is provided with a plurality of L-shaped plates 23 distributed in an array and arranged obliquely. The end of the L-shaped plate 23 away from the annular support seat 22 is comb-shaped. The cleaning assembly also includes an annular groove 24 opened on the annular support seat 22. The side wall of the annular groove 24 is provided with a plurality of array-distributed L-shaped plates 23. The support shaft 21 has a wedge-shaped protrusion 241, and a plurality of slide grooves 211 are formed inside the slide grooves 211. A wedge-shaped slider 212 adapted to the wedge-shaped protrusion 241 is slidably fitted in the slide grooves 211. A return spring 213 is provided between the wedge slider 212 and the bottom of the slide groove 211. When the conveyor net 123 passes through the cleaning assembly, the comb teeth of the L-shaped plate 23 pass through the mesh and pull the conveyor net 123. The conveyor net 123 is shaken by the cooperation of the wedge-shaped protrusion 241, the wedge slider 212 and the return spring 213.

[0054] During specific operation, although the structure of the undried sludge is relatively compact after being squeezed and formed by the forming roller 1202, it still has a certain fluidity due to its high water content. When the sludge falls onto the conveying net 123, part of the sludge will still be embedded in the mesh due to the impact force when falling. When the conveying net 123 moves to the cleaning component position, the comb teeth of the L-shaped plate 23 pass through the mesh to pull the conveying net 123. The L-shaped plate 23 drives the annular support seat 22 to rotate under the pulling of the conveying net 123. When the wedge-shaped protrusion 241 contacts the wedge-shaped surface of the wedge-shaped slider 212, the rotation of the annular support seat 22 is slowed down by the resistance, thereby pulling the conveying net 123. The net 123 is deformed, squeezing out the sludge in the mesh. When the annular support seat 22 rotates until the wedge-shaped protrusion 241 is separated from the wedge-shaped slider 212, the rotational resistance of the annular support seat 22 is reduced and the rotation speed is increased. In this way, the rotation speed of the annular support seat 22 is sometimes fast and sometimes slow, which has the effect of shaking the conveyor net 123, thereby improving the cleaning effect of the conveyor net 123 until the conveyor net 123 is separated from the L-shaped plate 23. Since the fluidity of the sludge is further reduced after preliminary drying, in this embodiment, only the conveyor net 123 of the upper conveyor belt is cleaned. If the conveyor net 123 of the lower conveyor belt needs to be cleaned, it is only necessary to add a cleaning component below the output end of the lower conveyor belt.

[0055] The support shaft 21 is also provided with an impurity removal component, which includes a support rod 25 fixed on the support shaft 21. A sleeve 251 is provided on the outside of the support rod 25. The sleeve 251 is fixedly connected to the annular support seat 22 by screws. When the annular support seat 22 rotates, the sleeve 251 is driven to rotate synchronously. A plurality of fan-shaped grooves are provided on the outer wall of the sleeve 251. An electromagnet 253 is embedded in the fan-shaped groove. When the sludge on the conveyor belt below is transported to the bottom of the electromagnet 253, the electromagnet 253 removes the magnetic impurities in the sludge. In addition, the impurity removal assembly also includes a plurality of conductive posts 254 fixed to the inner wall of the sleeve 251. The number and position of the conductive posts 254 correspond one-to-one to the electromagnets 253. An annular conductive sheet 255 is fixed on the support rod 25, which is slidably matched with the conductive posts 254. The annular conductive sheet 255 has a gap. When the conductive posts 254 are in contact with the annular conductive sheet 255, the corresponding electromagnet 253 is energized and has magnetism. When the conductive posts 254 are in the gap of the annular conductive sheet 255, the corresponding electromagnet 253 is de-energized.

[0056] During operation, when the small strips of sludge on the conveyor belt below pass through the electromagnet 253, the electromagnet 253 absorbs the exposed magnetic impurities or the sludge containing magnetic impurities, and as the annular support 22 rotates, the sleeve 251 drives the electromagnet 253 to rotate synchronously. When the electromagnet 253 rotates to the right horizontal position, the corresponding conductive column 254 is located in the gap of the annular conductive sheet 255. The electromagnet 253 is powered off and loses its magnetism, and the magnetic impurities or the sludge containing magnetic impurities absorbed thereon fall off under the action of gravity.

[0057] A collecting frame 26 is provided on the side wall of the box body 1, and an inclined guide plate 27 is provided in the drying chamber 12. After the electromagnet 253 is powered off, the magnetic impurities adsorbed on it fall onto the guide plate 27 under the action of gravity and then slide into the collecting frame 26.

[0058] The working principle of the present invention is as follows:

[0059] During operation, the forming motor 1203, the strip cutting motor 1206, the ball mill motor 142 and the blower 131 are turned on to introduce the sludge to be dried into the feed port 1201. After entering the feed port 1201, the sludge is squeezed by the rotating forming roller 1202 to form a sheet with uniform thickness. The sheeted sludge falls onto the conveyor belt above and is then transported to the first receiving hopper 1204. During the transportation on the conveyor belt above, the sludge is initially dried by the hot air blown by the blower 131.

[0060] The preliminarily dried sludge enters the first receiving hopper 1204 and is cut into strips. The strips then fall onto the conveyor belt below. The conveyor belt below transports the strips of sludge to the second receiving hopper 1207. The strips are then guided into the ball mill through the feeding pipe 1208 for grinding. During the sludge transportation on the conveyor belt below, it is further dried by the hot air blown by the blower 131.

[0061] When the conveyor net 123 of the upper conveyor belt rotates to the bottom of the conveyor belt, it is in a vertical state under the action of gravity. When the conveyor net 123 moves to the cleaning component position, the comb teeth of the L-shaped plate 23 pass through the mesh and pull the conveyor net 123. The L-shaped plate 23 drives the annular support seat 22 to rotate under the pull of the conveyor net 123. When the wedge-shaped protrusion 241 contacts the wedge-shaped surface of the wedge-shaped slider 212, the rotation of the annular support seat 22 is slowed down by resistance, thereby pulling the conveyor net 123, causing the conveyor net 123 to deform and squeeze out the sludge in the mesh. When the annular support seat 22 rotates until the wedge-shaped protrusion 241 is separated from the wedge-shaped slider 212, the rotation resistance of the annular support seat 22 is reduced and the rotation speed is increased. In this way, the rotation speed of the annular support seat 22 is fast and slow, which has the effect of shaking the conveyor net 123, thereby improving the cleaning effect of the conveyor net 123;

[0062] When the small strips of sludge on the conveyor belt below pass through the electromagnet 253, the electromagnet 253 absorbs the exposed magnetic impurities or the sludge containing magnetic impurities, and as the annular support seat 22 rotates, the sleeve 251 drives the electromagnet 253 to rotate synchronously. When the electromagnet 253 rotates to the horizontal position on the right, its corresponding conductive column 254 is in the gap of the annular conductive sheet 255, and the electromagnet 253 is powered off and loses its magnetism. The magnetic impurities or sludge containing magnetic impurities adsorbed thereon fall under the action of gravity, and the fallen magnetic impurities or sludge containing magnetic impurities are guided into the collection frame 26 through the guide plate 27.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sludge drying device with high-energy ball milling function, characterized in that: include: A box body (1), wherein two partitions (11) are provided in the box body (1), and the two partitions (11) divide the box body (1) from top to bottom into a drying chamber (12), a blast chamber (13), and a grinding chamber (14); A heating box (15) is located on the partition (11) above, and an air outlet is provided on the top of the heating box (15); The drying chamber (12) is provided with two groups of conveyor belts arranged up and down and conveying in opposite directions. The conveyor belts are composed of a sprocket (121), a chain (122) and a plurality of conveyor nets (123). One end of the conveyor net (123) is fixed to the chain (122), and the other end of the conveyor net (123) is a free end. When the conveyor net (123) moves to the bottom of the conveyor belt, the conveyor net (123) is in a vertical state under the action of gravity. A plurality of blowers (131) are provided in the blast chamber (13), and the air outlets of the plurality of blowers (131) are all connected to the heating box (15). The airflow generated by the blast chamber (13) is heated by the heating box (15) and then blown toward the drying chamber (12); A ball mill cylinder (141) and a ball mill motor (142) for driving the ball mill cylinder (141) to rotate are provided in the grinding chamber (14), and a gear reduction transmission is used between the ball mill motor (142) and the ball mill cylinder (141).

2. The sludge drying device with high-energy ball milling function according to claim 1, characterized in that: A feed port (1201) and an exhaust port (1200) are provided at the top of the drying chamber (12); a pair of forming rollers (1202) are provided in the feed port (1201); the forming rollers (1202) are driven by a forming motor (1203); after the sludge enters the feed port (1201), it is squeezed and formed by the forming rollers (1202) and then falls onto a conveyor belt above.

3. The sludge drying device with high-energy ball milling function according to claim 2, characterized in that: A first receiving hopper (1204) is provided at the conveying end of the upper conveyor belt. A pair of slitting rollers (1205) are provided in the first receiving hopper (1204). The slitting rollers (1205) are driven by a slitting motor (1206). The sludge on the upper conveyor belt falls into the first receiving hopper (1204), is cut into strips, and then falls onto the lower conveyor belt.

4. The sludge drying device with high-energy ball milling function according to claim 2, characterized in that: A second receiving hopper (1207) is provided at the conveying end of the conveyor belt below, and the discharge port of the second receiving hopper (1207) is connected to the feed port of the ball mill (141) through a feeding pipe (1208).

5. The sludge drying device with high-energy ball milling function according to claim 1, characterized in that: A cleaning assembly for cleaning the conveyor net (123) is provided in the drying chamber (12), the cleaning assembly comprising a support shaft (21) fixed to the side wall of the box body (1), an annular support seat (22) rotatably engaged with the support shaft (21), a plurality of L-shaped plates (23) distributed in an array and arranged obliquely are provided on the outer side wall of the annular support seat (22), and one end of the L-shaped plate (23) away from the annular support seat (22) is comb-shaped.

6. The sludge drying device with high-energy ball milling function according to claim 5, characterized in that: The cleaning component also includes an annular groove (24) opened on the annular support seat (22), and a plurality of array-distributed wedge-shaped protrusions (241) are provided on the side wall of the annular groove (24), and a plurality of slide grooves (211) are provided inside the support shaft (21), and a wedge-shaped slider (212) adapted to the wedge-shaped protrusions (241) is slidably fitted in the slide groove (211), and a return spring (213) is provided between the wedge-shaped slider (212) and the bottom of the slide groove (211). When the conveying net (123) passes through the cleaning component, the comb teeth of the L-shaped plate (23) pass through the mesh and pull the conveying net (123), and the conveying net (123) is shaken under the cooperation of the wedge-shaped protrusions (241), the wedge slider (212) and the return spring (213).

7. The sludge drying device with high-energy ball milling function according to claim 5, characterized in that: The support shaft (21) is also provided with an impurity removal assembly, which includes a support rod (25) fixed on the support shaft (21), a sleeve (251) provided on the outside of the support rod (25), a plurality of fan-shaped grooves provided on the outer wall of the sleeve (251), and an electromagnet (253) embedded in the fan-shaped groove. When the sludge on the conveyor belt below is transported to the bottom of the electromagnet (253), the electromagnet (253) removes magnetic impurities in the sludge.

8. The sludge drying device with high-energy ball milling function according to claim 7, characterized in that: The impurity removal assembly further comprises a plurality of conductive posts (254) fixed to the inner wall of the sleeve (251), the number and position of the conductive posts (254) corresponding to the electromagnets (253), an annular conductive sheet (255) slidably fitted with the conductive posts (254) is fixed on the support rod (25), and the annular conductive sheet (255) is provided with a notch. When the conductive posts (254) are in contact with the annular conductive sheet (255), the corresponding electromagnet (253) is energized and has magnetism, and when the conductive posts (254) are in the notch of the annular conductive sheet (255), the corresponding electromagnet (253) is de-energized.

9. The sludge drying device with high-energy ball milling function according to claim 8, characterized in that: A collecting frame (26) is provided on the side wall of the box body (1), and an inclined material guide plate (27) is provided in the drying chamber (12). After the electromagnet (253) is powered off, the magnetic impurities adsorbed on it fall onto the material guide plate (27) under the action of gravity and then slide into the collecting frame (26).

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