A municipal water supply and drainage sludge dehydration treatment device

Abstract

The present invention relates to the technical field of sludge treatment, and specifically to a municipal water supply and drainage sludge dewatering treatment device, comprising a base, a storage tank welded on the outer wall of one end of the base, a bracket welded on the outer wall of the storage tank, a dryer arranged on the outer wall of the end of the base away from the storage tank, and also comprising: a filter press mechanism. In the present invention, the filter press mechanism is arranged so that when working, the electric push rod drives the sleeve to move downward, and the sleeve drives the filter press plate to move downward to filter the sludge. As the filter press plate moves away from the plug, a negative pressure is formed in the sleeve. When the filter press plate is separated from the dredging rod, the water filtered out is drawn into the sleeve. When the filter press plate moves up, the dredging rod intercepts the water in the sleeve. As the water pressure inside the sleeve increases, the water is squeezed into the drain pipe through the one-way water valve and discharged, so as to avoid the situation where the water filtered out is in contact with the sludge for a long time, resulting in the water being reabsorbed.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a municipal water supply and drainage sludge dehydration treatment device. Background Art

[0002] The main purpose of municipal water supply and drainage sludge dewatering treatment is to reduce the sludge volume and moisture content, so as to facilitate transportation, storage and disposal. At present, most of the moisture in the sludge is generally removed by filter press equipment, and then the wet sludge is thoroughly dried by drying equipment to achieve the effect of complete dehydration.

[0003] However, the existing sludge dewatering device cannot discharge water in time during filter pressing, resulting in part of the water being reabsorbed by the sludge, which leads to incomplete dehydration. In addition, the mud cake formed by filter pressing is relatively compact, which is not conducive to drying and easily leads to insufficient heating of the inner layer of sludge, resulting in incomplete dehydration. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a municipal water supply and drainage sludge dewatering treatment device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A municipal water supply and drainage sludge dewatering treatment device comprises a base, a material storage tank is welded on the outer wall of one end of the base, a bracket is welded on the outer wall of the material storage tank, a dryer is arranged on the outer wall of the end of the base away from the material storage tank, and further comprises:

[0007] A filter press mechanism, used for filtering sludge and timely extracting filtered water, the filter press mechanism is arranged on a bracket, the filter press mechanism includes a sleeve, an electric push rod is welded on the outer wall of the bracket, a sleeve is welded on the outer wall of the output end of the electric push rod, a filter press plate is welded on the outer wall of the bottom end of the sleeve, a plug block is welded on the outer wall of the bottom side of the bracket, the sleeve is slidably sleeved on the outer wall of the plug block, a plurality of dredging rods are welded on the outer wall of the plug block, the dredging rods are adapted to the filter holes on the filter press plate, a drain pipe is welded on the bottom outer wall of the filter press plate, the drain pipe passes through the plug block, the bottom end of the drain pipe is connected with the sleeve, and a one-way water valve is provided at the connecting portion between the drain pipe and the sleeve;

[0008] A gathering mechanism is used to gather the sludge together during the filtration, thereby increasing the pressure on the sludge and improving the filtration effect. The gathering mechanism is arranged on the filtration mechanism;

[0009] And a crushing mechanism, which is used for crushing and separating the mud cake formed after filter pressing, wherein the crushing mechanism is arranged on the gathering mechanism.

[0010] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, a conveyor belt is arranged on the base, the conveyor belt is tightly fitted with the outlet at the bottom of the storage tank, a support plate is welded on the bottom inner wall of the base, and the support plate abuts against the inner ring wall of the conveyor belt.

[0011] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, the conveyor belt extends from the bottom of the storage tank to the bottom of the dryer, and a plurality of equidistant and linearly distributed material removal troughs are provided on the outer ring wall of the conveyor belt.

[0012] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, the gathering mechanism includes a floating frame, the floating frame is slidably sleeved on the outer wall of the sleeve, a circular limit frame is welded on the outer wall of the storage tank, a spring 1 is welded between the outer wall of the floating frame and the outer wall of the filter press plate, a pair of symmetrically distributed connecting rods 1 are rotatably inserted on the outer wall of the floating frame, and a circular arc-shaped gathering plate 1 is rotatably inserted on the outer wall of each connecting rod 1 away from the floating frame. A limiting rod is welded on the top outer wall of each gathering plate 1, and each limiting rod is slidably inserted on the outer wall of the gathering plate 1 on the other side, and a pair of circular arc-shaped gathering plates 2 are slidably inserted between the pair of gathering plates 1.

[0013] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, a pair of symmetrically distributed slide grooves are opened on the top outer wall of each of the gathering plates 1, and a sliding column is welded on the top outer wall of each of the gathering plates 2, and the sliding column is slidably inserted in the slide groove.

[0014] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, a pair of gathering plates one and a pair of gathering plates two are both located in the limiting frame, and the pair of gathering plates one and the pair of gathering plates two can be spliced ​​into a circle with the same inner diameter as the limiting frame.

[0015] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, the crushing mechanism includes a magnet, and the bottom of each gathering plate one and each gathering plate two are welded with a barb along the radial direction of the arc contour, and the outer walls of the two barbs located on the gathering plate one are welded with a sliding rod, and the outer wall of each of the sliding rods is slidably sleeved with a magnet, and the two magnets with opposite poles attract each other, and a spring two is bonded between the outer wall of each magnet and the outer wall of the barb.

[0016] In the above-mentioned municipal water supply and drainage sludge dewatering treatment device, a pair of connecting rods 2 are rotatably plugged into the outer wall of each magnet, a net fence is rotatably plugged into the end of each connecting rod 2, and the end of each net fence is rotatably plugged into the bottom inner wall of the gathering plate 1.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the filter press mechanism, when working, the electric push rod drives the casing to move downward, and the casing drives the filter plate to move downward to filter the sludge. As the filter plate moves away from the plug, negative pressure is formed in the casing. When the filter plate is separated from the dredging rod, the water filtered out is drawn into the casing. When the filter plate moves up, the dredging rod intercepts the water in the casing. As the water pressure inside the casing increases, the water is squeezed into the drain pipe through the one-way water valve and discharged, avoiding the situation where the water filtered out is in contact with the sludge for a long time, resulting in the water being reabsorbed;

[0019] 2. Through the gathering mechanism, when working, the sleeve drives the floating frame to move downward, so that the floating frame drives the gathering plates 1 and 2 to move downward. When the gathering plates 1 and 2 are inserted into the material trough, the filter press plate pulls the floating frame relative to the gathering plate 1 through the spring 1 to continue to move downward, so that under the action of the connecting rod 1, the two gathering plates 1 and 2 are close to each other, so that the sludge in the material trough is gathered. When the gathering plates 1 and 2 are in contact with the filter press plate, the filter press plate continues to stretch the spring 1 to achieve the effect of filtering the sludge, so that the filter press plate can contact the sludge earlier, thereby increasing the filtering stroke of the filter press plate, thereby achieving the purpose of improving the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a three-dimensional cross-sectional schematic diagram of the initial state of the sleeve of the present invention.

[0022] Figure 3 It is a three-dimensional schematic diagram of the floating frame of the present invention.

[0023] Figure 4 It is a three-dimensional schematic diagram of the folding plate 1 and the folding plate 2 of the present invention.

[0024] Figure 5 It is a three-dimensional schematic diagram of the crushing mechanism of the present invention.

[0025] Figure 6 It is a three-dimensional cross-sectional schematic diagram of the sleeve of the present invention.

[0026] Figure 7 It is a plan view of the overall structure of the present invention in working state.

[0027] Figure 8 for Figure 7 A magnified view of the structure at A.

[0028] Fig. 9 It is a plan view schematically showing the working status of the folding plate 1 and the folding plate 2 of the present invention.

[0029] In the figure: 1. base; 11. storage tank; 111. bracket; 112. plug; 113. dredging rod; 114. limit frame; 12. dryer; 13. conveyor belt; 131. material trough; 14. support plate; 2. sleeve; 21. electric push rod; 22. filter plate; 23. drain pipe; 231. one-way water valve; 3. floating frame; 31. spring one; 32. connecting rod one; 33. gathering plate one; 331. slide; 332. limit rod; 333. barb; 334. slide rod; 34. gathering plate two; 341. slide column; 4. magnet; 41. spring two; 42. connecting rod two; 43. fence. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] See also Figure 1-Figure 9 The present invention provides a technical solution: a municipal water supply and drainage sludge dewatering treatment device, comprising a base 1, a storage tank 11 is welded on the outer wall of one end of the base 1, a bracket 111 is welded on the outer wall of the storage tank 11, a dryer 12 is arranged on the outer wall of the end of the base 1 away from the storage tank 11, and further comprising:

[0033] The filter press mechanism is used for filtering the sludge and extracting the filtered water in time. The filter press mechanism is arranged on the bracket 111, and the filter press mechanism includes a sleeve 2. An electric push rod 21 is welded on the outer wall of the bracket 111. The sleeve 2 is welded on the outer wall of the output end of the electric push rod 21. A filter press plate 22 is welded on the outer wall of the bottom end of the sleeve 2. A plug block 112 is welded on the outer wall of the bottom side of the bracket 111. The sleeve 2 is slidably sleeved on the outer wall of the plug block 112. A plurality of dredging rods 113 are welded on the outer wall of the plug block 112. The dredging rods 113 are adapted to the filter holes on the filter press plate 22. A drain pipe 23 is welded on the outer wall of the bottom of the filter press plate 22. The drain pipe 23 passes through the plug block 112. The bottom end of the drain pipe 23 is connected to the sleeve 2. A one-way water valve 231 is provided at the connecting portion between the drain pipe 23 and the sleeve 2.

[0034] The gathering mechanism is used to gather the sludge together during the filter pressing, increase the pressure on the sludge, and improve the filter pressing effect. The gathering mechanism is arranged on the filter pressing mechanism;

[0035] And a crushing mechanism, which is used for crushing and separating the mud cake formed after filter pressing, and the crushing mechanism is arranged on the gathering mechanism.

[0036] A conveyor belt 13 is provided on the base 1, and the conveyor belt 13 is tightly fitted with the outlet at the bottom of the storage tank 11. A support plate 14 is welded on the inner wall of the bottom of the base 1, and the support plate 14 abuts against the inner ring wall of the conveyor belt 13. The conveyor belt 13 extends from the bottom of the storage tank 11 to the bottom of the dryer 12. A plurality of equidistant linearly distributed material removal troughs 131 are opened on the outer ring wall of the conveyor belt 13.

[0037] The conveyor belt 13 is driven by an independent power source not shown in the figure. The support plate 14 is provided so that the conveyor belt 13 fits tightly with the outlet of the storage tank 11 and the conveyor belt 13 does not bend or deform when subjected to pressure.

[0038] In the initial state, the electric push rod 21 is in a retracted state, the filter press plate 22 is in contact with the plug block 112 , and the dredging rod 113 is slidably inserted into the filter hole on the filter press plate 22 .

[0039] The above-mentioned filter press mechanism is further explained as follows: when working, the collected sludge is stored in the storage tank 11, and then the conveyor belt 13 is started. Whenever the conveyor belt 13 drives the material trough 131 to pass through the bottom of the storage tank 11, the sludge in the storage tank 11 will fill the material trough 131. When the material trough 131 moves to just below the sleeve 2, the conveyor belt 13 is closed, and the electric push rod 21 is started. The electric push rod 21 drives the sleeve 2 to move downward, first triggering the gathering mechanism to gather the sludge in the material trough 131 together, and then the sleeve 2 continues to drive the filter press plate 22 to move downward to filter the sludge. As the filter press plate 22 moves away from the plug block 112, the space between the filter press plate 22 and the plug block 112 in the sleeve 2 increases, forming a filter press plate 22. Negative pressure is formed. When the electric push rod 21 is extended to the limit position, the filter press plate 22 is separated from the unblocking rod 113, so that the water filtered out is sucked into the casing 2, and then the electric push rod 21 is controlled to contract, so that the filter press plate 22 moves up and is plugged with the unblocking rod 113 again, so that the water is intercepted in the casing 2. At the same time, the unblocking rod 113 can unblock the filter press plate 22 to avoid blockage. As the filter press plate 22 gradually approaches the plug 112, the water pressure inside the casing 2 increases, so that the water is squeezed into the drain pipe 23 through the one-way water valve 231 and discharged, thereby achieving the effect of timely discharging water during filtration and avoiding long-term contact between the filtered water and the sludge, which leads to the reabsorption of water.

[0040] Specifically, the gathering mechanism includes a floating frame 3, the floating frame 3 is slidably sleeved on the outer wall of the sleeve 2, a circular limiting frame 114 is welded on the outer wall of the storage tank 11, a spring 31 is welded between the outer wall of the floating frame 3 and the outer wall of the filter press plate 22, a pair of symmetrically distributed connecting rods 32 are rotatably inserted on the outer wall of the floating frame 3, and an arc-shaped gathering plate 33 is rotatably inserted on the outer wall of each connecting rod 32 away from the floating frame 3, and a limiting rod 332 is welded on the top outer wall of each gathering plate 33, and each limiting rod 332 is slidably inserted into the outer wall of the top outer wall of each gathering plate 33. Connected to the outer wall of the folding plate 1 33 on the other side, a pair of arc-shaped folding plates 2 34 are slidably inserted between the pair of folding plates 1 33, a pair of symmetrically distributed slide grooves 331 are opened on the top outer wall of each folding plate 1 33, and a sliding column 341 is welded on the top outer wall of each folding plate 2 34, and the sliding column 341 is slidably inserted in the slide groove 331, and the pair of folding plates 1 33 and the pair of folding plates 2 34 are both located in the limit frame 114, and the pair of folding plates 1 33 and the pair of folding plates 2 34 can be spliced ​​into a circle with the same inner diameter as the limit frame 114.

[0041] By setting the limiting rod 332, the two folding plates 1 33 are kept in a parallel state without tilting, and the inner diameter of the limiting frame 114 is equal to the inner diameter of the material taking trough 131.

[0042] In the initial state, the filter press plate 22 drives the floating frame 3 to rise, and the spring 1 31 is in a compressed state, so that the floating frame 3 pushes the two folding plates 1 33 away from each other through the connecting rod 1 32. At the same time, under the action of the slide groove 331 and the slide column 341, the two folding plates 2 34 also move away from each other. When the folding plates 1 33 and the folding plates 2 34 are spliced ​​into a circle and are intercepted by the limit frame 114, the floating frame 3 can drive the folding plates 1 33 and the folding plates 2 34 to move up and away from the conveyor belt 13.

[0043] The above-mentioned gathering mechanism is further explained as follows: when working, the sleeve 2 drives the floating frame 3 to move downward, so that the floating frame 3 drives the gathering plate 1 33 and the gathering plate 2 34 to move downward. When the gathering plate 1 33 and the gathering plate 2 34 are inserted into the material trough 131, the filter press plate 22 pulls the floating frame 3 relative to the gathering plate 1 33 through the spring 1 31 to continue to move downward, so that under the action of the connecting rod 1 32, the two gathering plates 1 33 and the gathering plates 2 34 are close to each other, so that the sludge in the material trough 131 is gathered together. When the gathering plate 1 33 and the gathering plate 2 34 are in contact with the filter press plate 22, the filter press plate 22 continues to stretch the spring 1 31 to achieve the effect of filtering the sludge. Since the bottom area of ​​the sludge volume becomes smaller after gathering, according to the volume calculation formula, the sludge gathering height becomes higher, so that the filter press plate 22 can contact the sludge earlier, thereby making the filtration stroke of the filter press plate 22 larger, thereby achieving the purpose of improving the filtration effect.

[0044] Specifically, the crushing mechanism includes a magnet 4, and the bottom of each folding plate 1 33 and each folding plate 2 34 is welded with a hook 333 along the radial direction of the arc contour, and the outer walls of the two hooks 333 located on the folding plate 1 33 are welded with a slide bar 334, and the outer wall of each slide bar 334 is slidably sleeved with a magnet 4, and the two magnets 4 attract each other with opposite poles, and a spring 2 41 is bonded between the outer wall of each magnet 4 and the outer wall of the hook 333, and a pair of connecting rods 2 42 are rotatably inserted on the outer wall of each magnet 4, and the end of each connecting rod 2 42 is rotatably inserted with a net fence 43, and the end of each net fence 43 is rotatably inserted on the bottom inner wall of the folding plate 1 33.

[0045] In the initial state, the two folding plates 1 33 drive the two magnets 4 to move away from each other, so that under the action of the spring 2 41, the magnets 4 drive the net fence 43 to unfold.

[0046] The above crushing mechanism is further described: during the filtration, when the two folding plates 1 33 and the two folding plates 2 34 are close to each other, the two magnets 4 attract each other under the action of magnetic force, so that the two magnets 4 overcome the elastic force of the spring 2 41 and approach each other, and under the action of the connecting rod 2 42, the connecting rod 2 42 pulls the net fence 43. The outer wall of each connecting rod 2 42 is welded with a net fence 43 that flips and unfolds. After the filtration is completed, the two folding plates 1 33 and the two folding plates 2 34 move away from each other, so that the barbs 333 can tear the mud cake formed by compression. At the same time, the two magnets 4 move away from each other, so that the spring 2 41 pushes the magnet 4 to reset, so that the net fence 43 flips and unfolds again. Through the movement of the connecting rod 2 42 and the net fence 43, the mud blocks can be pushed away, and the mud cake can be squeezed into thin strips through the mesh holes on the net fence 43, further improving the mud cake separation effect, increasing the contact area between the sludge and the air, and facilitating subsequent drying.

[0047] The working principle and use process of the present invention are as follows: during operation, the collected sludge is stored in the material storage tank 11, and then the conveyor belt 13 is started. Whenever the conveyor belt 13 drives the material taking trough 131 to pass the bottom of the material storage tank 11, the sludge in the material storage tank 11 will fill the material taking trough 131. When the material taking trough 131 moves to the bottom of the sleeve 2, the conveyor belt 13 is closed and the electric push rod 21 is started. The electric push rod 21 drives the sleeve 2 to move downward, and the sleeve 2 drives the floating frame 3 to move downward, so that the floating frame 3 drives the folding plate 1 33 and the folding plate 2 34 to move downward. When the folding plate 1 33 and the folding plate 2 34 are inserted into the material taking trough 131, under the action of the gathering mechanism, the two folding plates 1 33 and the folding plate 2 34 are close to each other, so that the sludge in the material taking trough 131 is gathered together, thereby increasing the filtration stroke of the filter press plate 22 and achieving the purpose of improving the filtration effect. When the electric push rod 21 is extended to the limit position, the filter press plate 22 is separated from the dredging rod 113, so that the water filtered out is sucked into the sleeve 2, and then the electric push rod 21 is controlled to shrink, so that the filter plate 22 moves up and is plugged into the dredging rod 113 again, so that the water is intercepted in the sleeve 2, and the effect of timely discharge of water during filter pressing is achieved, and the long-term contact between the water filtered out and the sludge is avoided, which leads to the situation that the water is reabsorbed. At the same time, under the action of the crushing mechanism, when the filter pressing is completed, the two folding plates 1 33 and the two folding plates 2 34 move away from each other, so that the barb 333 can tear the mud cake formed by compression. At the same time, the spring 2 41 pushes the magnet 4 to reset, so that the net fence 43 is flipped and unfolded again, and the mud blocks can be pushed away by the movement of the connecting rod 2 42 and the net fence 43, and the mud cake can be squeezed into thin strips through the mesh holes on the net fence 43, further improving the mud cake separation effect, increasing the contact area between the sludge and the air, and facilitating subsequent drying.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A municipal water supply and drainage sludge dewatering treatment device, comprising a base (1), a storage tank (11) is welded to the outer wall of one end of the base (1), a bracket (111) is welded to the outer wall of the storage tank (11), and a dryer (12) is arranged on the outer wall of the end of the base (1) away from the storage tank (11), characterized in that: Also includes: A filter press mechanism is used for filtering sludge and timely extracting filtered water, the filter press mechanism being arranged on a bracket (111), the filter press mechanism comprising a sleeve (2), an electric push rod (21) being welded on the outer wall of the bracket (111), a sleeve (2) being welded on the outer wall of the output end of the electric push rod (21), a filter press plate (22) being welded on the outer wall of the bottom end of the sleeve (2), a plug (112) being welded on the outer wall of the bottom side of the bracket (111), and the sleeve (2) being slidably sleeved. Mounted on the outer wall of the plug block (112), a plurality of dredging rods (113) are welded on the outer wall of the plug block (112), the dredging rods (113) are matched with the filter holes on the filter press plate (22), a drainage pipe (23) is welded on the bottom outer wall of the filter press plate (22), the drainage pipe (23) passes through the plug block (112), the bottom end of the drainage pipe (23) is connected to the sleeve (2), and a one-way water valve (231) is provided at the connection portion between the drainage pipe (23) and the sleeve (2); The gathering mechanism is used to gather the sludge together during filtration, increase the pressure on the sludge, and improve the filtration effect. The gathering mechanism is arranged on the filter press mechanism, and comprises a floating frame (3). The floating frame (3) is slidably sleeved on the outer wall of the sleeve (2). A circular limiting frame (114) is welded on the outer wall of the storage tank (11). A spring (31) is welded between the outer wall of the floating frame (3) and the outer wall of the filter plate (22). A pair of symmetrically distributed connecting rods (32) are rotatably inserted on the outer wall of the floating frame (3). An arc-shaped gathering plate (33) is rotatably inserted on the outer wall of each connecting rod (32) away from the floating frame (3). The outer wall of the top of each gathering plate (33) is provided with a spring (31). A limit rod (332) is welded on each of the limit rods (332), each of which is slidably inserted on the outer wall of the folding plate 1 (33) on the other side, and a pair of arc-shaped folding plates 2 (34) are slidably inserted between the pair of folding plates 1 (33); a pair of symmetrically distributed slide grooves (331) are opened on the top outer wall of each of the folding plates 1 (33), and a slide column (341) is welded on the top outer wall of each of the folding plates 2 (34), and the slide column (341) is slidably inserted in the slide groove (331); the pair of folding plates 1 (33) and the pair of folding plates 2 (34) are both located in the limit frame (114), and the pair of folding plates 1 (33) and the pair of folding plates 2 (34) can be spliced ​​into a circle with the same inner diameter as the limit frame (114); And a crushing mechanism, which is used for crushing and separating the mud cake formed after filter pressing, wherein the crushing mechanism is arranged on the gathering mechanism.

2. A municipal water supply and drainage sludge dewatering treatment device according to claim 1, characterized in that: A conveyor belt (13) is provided on the base (1), and the conveyor belt (13) is tightly fitted with the outlet at the bottom of the storage tank (11). A support plate (14) is welded to the inner wall of the bottom of the base (1), and the support plate (14) abuts against the inner ring wall of the conveyor belt (13).

3. A municipal water supply and drainage sludge dewatering treatment device according to claim 2, characterized in that: The conveyor belt (13) extends from below the material storage tank (11) to below the dryer (12), and a plurality of equidistant and linearly distributed material removal troughs (131) are provided on the outer ring wall of the conveyor belt (13).

4. A municipal water supply and drainage sludge dewatering treatment device according to claim 1, characterized in that: The crushing mechanism comprises a magnet (4), and the bottom of each folding plate 1 (33) and each folding plate 2 (34) is welded with a hook (333) along the radial direction of the arc contour, and the outer walls of the two hooks (333) located on the folding plate 1 (33) are welded with a slide bar (334), and the outer wall of each slide bar (334) is slidably sleeved with a magnet (4), and the two magnets (4) attract each other with opposite poles, and a spring 2 (41) is bonded between the outer wall of each magnet (4) and the outer wall of the hook (333).

5. A municipal water supply and drainage sludge dewatering treatment device according to claim 4, characterized in that: A pair of connecting rods (42) are rotatably plugged on the outer wall of each magnet (4), a net fence (43) is rotatably plugged on the end of each connecting rod (42), and an end of each net fence (43) is rotatably plugged on the bottom inner wall of the folding plate (33).

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