A sludge dewatering apparatus for sewage treatment

Abstract

The application relates to a sludge dewatering device for sewage treatment and relates to the technical field of sludge dewatering devices, which comprises a base, a sludge inlet assembly and a filter pressing assembly; the filter pressing assembly comprises a filter pressing box, a filter plate frame, a driving piece and a drainage piece; the filter pressing box is located on the base and fixedly connected with the base; the filter plate frame is wrapped with a filter screen; the filter screen is fixedly connected with the filter plate frame through screws; the driving piece is used for driving the filter plate frame to slide; the drainage piece is connected with the filter plate frame; the drainage piece is used for draining water removed from sludge out of the filter pressing box; and the sludge inlet assembly is used for conveying sludge into the gap between two adjacent filter plate frames. The application can effectively form sufficient extrusion pressing on sludge, thereby being favorable for guaranteeing good dewatering effect on sludge.

Description

Technical Field

[0001] This application relates to the technical field of sludge dewatering equipment, and in particular to a sludge dewatering equipment for wastewater treatment. Background Technology

[0002] Wastewater treatment processes generate large amounts of sludge, which is bulky and has a high water content. If this sludge is not properly treated, it will have a serious impact on the environment. Therefore, it is essential to reduce, stabilize, and render harmless the sludge. There are many methods for sludge treatment, including sludge thickening, sludge dewatering, sludge digestion, and sludge drying. Sludge dewatering refers to the process of removing water from thickened sludge, thereby reducing its volume and increasing its solids content.

[0003] In related technologies, such as application number 202110387385.1, a sludge dewatering device is disclosed. This device includes a frame, within which are a filter press, a demolding device, a lifting device, a drainage device, and a sludge inlet. An air inlet is mounted on the frame, positioned above the filter press and fixed to its top surface. A demolding device is located below the filter press, and a lifting device is located below the demolding device. A drainage device is located between the filter press and the demolding device. A sludge inlet is located on one side of the lifting device. This dewatering device, through its filter press, reduces the floor space required compared to conventional plate and frame sludge dewatering machines, thus improving land use efficiency.

[0004] Regarding the aforementioned technologies, in actual use, the dewatering equipment merely expands the filter cloth through the air intake device and then squeezes and dewaters the sludge. Because the filter cloth cannot fully compress and filter the sludge, the dewatering effect of the sludge is poor. Summary of the Invention

[0005] In order to achieve sufficient pressing and filtration of sludge, thereby improving the dewatering effect of sludge, this application provides a sludge dewatering device for sewage treatment.

[0006] The sludge dewatering equipment for wastewater treatment provided in this application adopts the following technical solution:

[0007] A sludge dewatering device for wastewater treatment includes a base, a sludge inlet assembly, and a filter press assembly. The filter press assembly is located on the base and includes a filter press box, filter plate frames, a drive component, and a drainage component. The filter press box is located on the base and fixedly connected to it. Multiple filter plate frames are provided, spaced apart along the length of the bottom wall of the filter press box and slidably connected to it. A filter screen is wrapped around each filter plate frame, and the filter screen is fixedly connected to the filter plate frame with screws. The drive component drives the filter plate frames to slide. The drainage component is connected to the filter plate frames and is used to discharge the water from the sludge dewatering process out of the filter press box. The sludge inlet assembly is used to transport the sludge into the gap between two adjacent filter plate frames.

[0008] By adopting the above technical solution, during sludge dewatering, the sludge to be dewatered is conveyed to the gap between two adjacent filter plate frames through the sludge inlet assembly. Then, the drive component moves the filter plate frames closer to each other. During the movement of the filter plate frames, a strong squeezing and pressing effect is achieved on the sludge. The filter screen filters the water pressed out by the sludge, and the resulting wastewater enters the filter plate frames. Then, the wastewater is discharged outside the filter press box for collection through the drainage component. This structure effectively achieves sufficient squeezing and pressing of the sludge, thus ensuring a good dewatering effect.

[0009] Optionally, the filter press box has a sliding groove on its side wall, and a slider is fixedly connected to the side wall of the filter plate frame. The filter plate frame is slidably connected to the sliding groove through the slider. The driving component includes a return spring and a reciprocating electric cylinder. Multiple return springs are provided, and two adjacent filter plate frames are fixedly connected by return springs. The return springs are located in the sliding grooves and tend to increase the distance between two adjacent filter plate frames. The cylinder body of the reciprocating electric cylinder is fixedly connected to the outer wall of the filter press box, and one end of the telescopic rod of the reciprocating electric cylinder extends into the filter press box and is fixedly connected to one of the filter plate frames at the end.

[0010] By adopting the above technical solution, during the pressing and filtration process, a reciprocating electric cylinder drives one of the end filter plate frames to move. Since adjacent filter plate frames are connected by return springs, the reciprocating electric cylinder can simultaneously drive multiple filter plate frames to move closer and squeeze each other, thereby effectively compressing and filtering the sludge. After the pressing and filtration is completed, the reciprocating electric cylinder drives one of the end filter plate frames to reset. Then, the filter plate frames can pull multiple filter plate frames to move synchronously through the return springs, thereby resetting multiple filter plate frames for the next pressing and dewatering.

[0011] Optionally, the filter press assembly further includes a demolding scraper and a demolding electric cylinder. The demolding scraper is located at the bottom of the filter press box and is slidably connected to the filter press box. The telescopic demolding electric cylinder is used to drive the demolding scraper to slide. The bottom wall of the filter press box has a mud discharge hole between two adjacent filter plate frames. The demolding scraper has a discharge hole that corresponds one-to-one with the mud discharge hole. A mud collection trough is provided at the bottom of the demolding scraper.

[0012] By adopting the above technical solution, this equipment achieves automatic demolding of dewatered sludge through the installation of a demolding scraper and a demolding electric cylinder. The design of the sludge discharge hole allows the dewatered sludge to be discharged through it. The sliding connection design of the demolding scraper allows it to slide at the bottom of the filter press box, scraping the dewatered sludge off the filter plate frame. The design of the sludge collection trough collects the scraped sludge. After the sludge is discharged, the demolding electric cylinder drives the demolding scraper to slide, thereby blocking the sludge discharge hole at the bottom of the filter press box. This allows the sludge to be transported to the gap between two adjacent filter plate frames for further filtration. During sludge discharge, the demolding electric cylinder drives the demolding scraper to slide, connecting the discharge hole on the scraper with the sludge discharge hole at the bottom of the filter press box, allowing the sludge to be smoothly discharged and collected in the sludge collection trough.

[0013] Optionally, the filter plate frame is provided with a plurality of mud discharge springs, which are horizontally arranged and located inside the filter screen. The two ends of the mud discharge springs are fixedly connected to the filter screens on both sides, and the free length of the mud discharge springs is equal to the thickness of the filter plate frame. A tension member is provided on the filter plate frame at the end of the mud discharge springs, and the tension member is used to stretch the mud discharge springs.

[0014] By adopting the above technical solution, the horizontal setting of the sludge discharge spring can provide a certain buffering effect when the filter plate frame is squeezed, thereby protecting the filter plate frame from damage. During the filter plate frame reset process, the tensioning component can stretch the sludge discharge spring. As the reciprocating electric cylinder continuously drives the pull rope spring to extend, when the tensioning component separates from the sludge discharge spring, the elastic vibration of the sludge discharge spring can shake off the sludge adhering to the filter screen, thereby achieving a better sludge cleaning effect.

[0015] Optionally, the tensioning member includes a first adsorption magnet and a second adsorption magnet. The first adsorption magnet is fixedly connected to the end of the sludge discharge spring on the left filter plate frame, and the second adsorption magnet is fixedly connected to the end of the sludge discharge spring on the right filter plate frame. The second adsorption magnet and the first adsorption magnet are correspondingly arranged and attract each other. The maximum elastic force of the sludge discharge spring is greater than the attraction force between the first adsorption magnet and the second adsorption magnet.

[0016] By adopting the above technical solution, this equipment achieves the stretching of the mud discharge spring through the addition of a tensioning component. The design of the first and second adsorption magnets makes the tensioning component more stable and reliable when stretching the mud discharge spring. The mutual attraction between the first and second adsorption magnets provides a certain pulling force, thereby stretching the mud discharge spring. The aforementioned tensioning component can achieve automatic adsorption and disconnection, thus realizing the pulling and automatic disconnection of the mud discharge spring. It has the advantages of simple structure, strong practicality, and long service life.

[0017] Optionally, the end of the first adsorption magnet is set to be tapered, and the end of the second adsorption magnet is set to be a tapered groove that matches the end of the first adsorption magnet.

[0018] By adopting the above technical solution and incorporating a conical design, a better connection between the first and second adsorption magnets is achieved. Since there is sludge between the first and second adsorption magnets, the conical groove design allows the conical end of the first adsorption magnet to accurately insert into the conical groove of the second adsorption magnet, preventing the sludge from interfering with the two magnets. Furthermore, the conical groove design increases the contact area between the two magnets, thereby improving their adsorption stability.

[0019] Optionally, the second adsorption magnet has multiple dispersion holes penetrating through the inner wall of the conical groove.

[0020] By adopting the above technical solution, the design of the dispersion hole makes the docking of the first and second adsorption magnets more stable and reliable. When sludge is present in the conical groove during the docking process of the first and second adsorption magnets, the sludge can be discharged through the dispersion hole as the first adsorption magnet is squeezed, thereby avoiding interference from the sludge to the first and second adsorption magnets and further improving the adsorption stability of the first and second adsorption magnets.

[0021] Optionally, the sludge feeding assembly includes a sludge pump and a sludge pipe. The sludge pump is located on the base, the inlet of the sludge pump is fixedly connected to the sludge inlet pipe, the outlet of the sludge pump is fixedly connected to the sludge pipe, and the outlet of the sludge pipe is connected to the filter press box.

[0022] By adopting the above technical solution and setting up a sludge inlet assembly, automatic sludge conveying is achieved. The sludge pump is designed to transport sludge from the sludge inlet pipe to the sludge outlet pipe, and then from the outlet pipe to the filter press. This setup improves the automation level of the dewatering equipment, thereby facilitating continuous sludge dewatering and increasing the efficiency of sludge dewatering.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application uses a driving component to move the filter plate frame towards each other. During the movement of the filter plate frame, it can exert a strong squeezing and pressing force on the sludge. The filter screen filters the water pressed out by the sludge, and the resulting wastewater enters the filter plate frame and is then discharged outside the filter press box for collection through a drainage component. The above structure can effectively squeeze and press the sludge, thereby ensuring a good dewatering effect.

[0025] 2. This application uses a reciprocating electric cylinder to move one filter plate frame at the end. Since adjacent filter plate frames are connected by return springs, the reciprocating electric cylinder can simultaneously drive multiple filter plate frames to move closer and squeeze each other, thereby effectively compressing and filtering the sludge. After the filtration is completed, the reciprocating electric cylinder drives one filter plate frame at the end to reset. Then, the filter plate frame can pull multiple filter plate frames to move synchronously through the return springs, thereby resetting multiple filter plate frames for the next filtration and dewatering.

[0026] 3. This application achieves automatic demolding of dewatered sludge by setting up a demolding scraper and a demolding electric cylinder. During sludge discharge, the demolding electric cylinder drives the demolding scraper to slide, so that the discharge hole on the demolding scraper is connected to the sludge discharge hole at the bottom of the filter press box, thereby allowing the sludge to be discharged smoothly and collected in the sludge collection trough. After the sludge is scraped off, the demolding electric cylinder drives the demolding scraper to slide, thereby blocking the sludge discharge hole at the bottom of the filter press box, so that the sludge to be treated can be transported to the gap between two adjacent filter plate frames for the next step of filtration.

[0027] 4. This application, by setting a mud discharge spring and a tensioning component, when the reciprocating electric cylinder continuously drives the pull rope spring to extend, and when the tensioning component separates from the mud discharge spring, the sludge adhering to the filter screen can be shaken off due to the elastic vibration of the mud discharge spring, thereby achieving a better sludge cleaning effect, thereby reducing the situation of sludge adhering to the filter screen, which is conducive to ensuring that the filter screen maintains a good filtration effect.

[0028] 5. The design of the first and second adsorption magnets in this application makes the tensioning component more stable and reliable when stretching the mud discharge spring. The first and second adsorption magnets attract each other, providing a certain pulling force, thereby stretching the mud discharge spring. The aforementioned tensioning component can achieve automatic adsorption and disconnection, thus realizing the pulling rope and automatic disconnection of the mud discharge spring, and has the advantages of simple structure, strong practicality, and long service life. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0030] Figure 2 This is a longitudinal sectional view of the filter press box according to an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the filter plate frame according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the connection structure between the mud-discharging spring and the tensioning member in an embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Base; 2. Filter press assembly; 21. Filter press box; 211. Support rod; 212. Slide groove; 213. Sludge discharge hole; 22. Filter plate frame; 222. Filter screen; 223. Slider; 224. Telescopic hose; 225. Drain pipe; 226. Sludge discharge spring; 227. First adsorption magnet; 228. Second adsorption magnet; 2281. Conical groove; 2282. Dispersion hole; 23. Driving component; 231. Return spring; 232. Reciprocating electric cylinder; 24. Demolding scraper; 241. Discharge hole; 242. Sludge collection trough; 25. Demolding electric cylinder; 3. Sludge inlet assembly; 31. Sludge pump; 311. Sludge inlet pipe; 32. Sludge pipe. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0035] This application discloses a sludge dewatering device for wastewater treatment. (Refer to...) Figure 1 and Figure 2 A sludge dewatering device for wastewater treatment includes a base 1, a filter press assembly 2, and a sludge inlet assembly 3.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The base 1 is a rectangular plate. The filter press assembly 2 is located on the base 1. The filter press assembly 2 includes a filter press box 21, a filter plate frame 22, a drive component 23, a drainage component, a demolding scraper 24, and a demolding electric cylinder 25. The filter press box 21 is located on the base 1 and is fixedly connected to the base 1 by a support rod 211. The filter plate frame 22 is located inside the filter press box 21. There are multiple filter plate frames 22. The multiple filter plate frames 22 are distributed at intervals along the length of the bottom wall of the filter press box 21. The left and right sides of the filter plate frame 22 form a water inlet channel with sufficient space through crisscrossing connecting rods. The filter plate frame 22 is wrapped with a filter screen 222. The filter screen 222 is made of polyurethane high elastic wear-resistant filter screen 222. The filter screen 222 is fixedly connected to the filter plate frame 22 by screws.

[0037] Reference Figure 2 and Figure 3The filter plate frame 22 located at the right end of the filter press 21 is fixedly connected to the filter press 21. The remaining filter plate frames 22 are fixedly connected to the front and rear side walls respectively by sliders 223. The front and rear side walls inside the filter press 21 are provided with sliding grooves 212. The filter press frame is slidably connected to the sliding grooves 212 through the sliders 223. The sliding connection between the filter plate frame 22 and the filter press 21 is realized by the cooperation of the sliders 223 and the sliding grooves 212.

[0038] Reference Figure 2 and Figure 3 The driving component 23 includes a return spring 231 and a reciprocating electric cylinder 232. Multiple return springs 231 are provided, and adjacent filter plate frames 22 are fixedly connected by the return springs 231. The return springs 231 are located within a slide groove 212. One end of the return spring 231 is fixedly connected to a slider 223 of a filter press frame, and the other end is fixedly connected to a slider 223 of another adjacent filter plate frame 22. The return springs 231 tend to increase the distance between adjacent filter plate frames 22. The cylinder body of the reciprocating electric cylinder 232 is welded to the outer wall of the filter press box 21. One end of the telescopic rod of the reciprocating electric cylinder 232 extends into the filter press box 21 and is fixedly connected to one of the filter plate frames 22 at the end. By driving the filter plate frames 22 to slide through the reciprocating electric cylinder 232, the sludge is squeezed and filtered.

[0039] Reference Figure 2 and Figure 3 The drainage components include a telescopic hose 224 and a drain pipe 225. The bottom of two adjacent filter plate frames 22 are fixedly connected to the telescopic hose 224 for drainage. The bottom of the filter plate frame 22 located at the right end of the filter press box 21 is fixedly connected to the drain pipe 225. One end of the drain pipe 225 extends to the outside of the filter press box 21, thereby discharging the sludge.

[0040] Reference Figure 1 and Figure 2 The demolding scraper 24 is located at the bottom of the filter press 21 and is slidably connected to it. A sludge discharge hole 213 is provided on the bottom wall of the filter press 21 between two adjacent filter plate frames 22. The demolding scraper 24 has discharge holes 241 corresponding to the sludge discharge holes 213. The cylinder body of the demolding electric cylinder 25 is fixedly connected to the side wall of the filter press 21 with screws, and the output shaft of the demolding electric cylinder 25 is fixedly connected to the demolding scraper 24. A sludge collection trough 242 is provided at the bottom of the demolding scraper 24. When discharging sludge, the demolding electric cylinder 25 drives the demolding scraper 24 to slide, so that the discharge hole 241 on the demolding scraper 24 communicates with the sludge discharge hole 213 at the bottom of the filter press 21, thereby smoothly discharging the sludge and collecting it through the sludge collection trough 242. After the sludge is discharged, the demolding electric cylinder 25 drives the demolding scraper 24 to slide, thereby blocking the sludge discharge hole 213 at the bottom of the filter press box 21. This allows the sludge to be treated to be transported to the gap between two adjacent filter plate frames 22 for the next step of filter pressing.

[0041] Reference Figure 2 , Figure 3 and Figure 4 Multiple mud-discharging springs 226 are provided inside the filter plate frame 22. In this embodiment, four mud-discharging springs 226 are provided inside each filter plate frame 22, and the four mud-discharging springs 226 are evenly distributed along the side surface of the filter plate frame 22. The mud-discharging springs 226 are located inside the filter screen 222, and are horizontally arranged. The two ends of the mud-discharging springs 226 along the length direction are fixedly connected to the filter screens 222 on both sides, and the free length of the mud-discharging springs 226 is equal to the thickness of the filter plate frame 22.

[0042] Reference Figure 2 , Figure 3 and Figure 4 A tensioning member is provided on the filter plate frame 22 at the end of the mud discharge spring 226. The tensioning member includes a first adsorption magnet 227 and a second adsorption magnet 228, both of which are horizontally arranged cylindrical magnets. The first adsorption magnet 227 is coaxially and fixedly connected to the end of the mud discharge spring 226 on the left filter plate frame 22, and the second adsorption magnet 228 is coaxially and fixedly connected to the end of the mud discharge spring 226 on the right filter plate frame 22. The first adsorption magnet 227 and the second adsorption magnet 228 are arranged facing each other and attract each other. The maximum elastic force of the mud discharge spring 226 is greater than the attraction between the first adsorption magnet 227 and the second adsorption magnet 228.

[0043] Reference Figure 2 , Figure 3 and Figure 4 The end of the first adsorption magnet 227 furthest from the mud discharge spring 226 is tapered, and the end of the second adsorption magnet 228 furthest from the mud discharge spring 226 is formed by a tapered groove 2281 that matches the end of the first adsorption magnet 227. The end of the first adsorption magnet 227 can be inserted into the tapered groove 2281 of the second adsorption magnet 228. The second adsorption magnet 228 has multiple dispersion holes 2282 penetrating through the inner wall of the tapered groove 2281.

[0044] Reference Figure 1 and Figure 2 The sludge inlet assembly 3 is located on the base 1 and on one side of the filter press box 21. The sludge inlet assembly 3 includes a sludge pump 31 and a sludge pipe 32. The sludge pump 31 is located on the base 1 and is fixedly connected to the base 1 with screws. The inlet of the sludge pump 31 is fixedly connected to the sludge inlet pipe 311 with a flange. The outlet of the sludge pump 31 is fixedly connected to the sludge pipe 32 with a flange. The outlet of the sludge pipe 32 is fixedly connected to the filter press box 21. The outlet of the sludge pipe 32 is connected to the gaps between multiple filter plate frames 22 to facilitate sludge transportation.

[0045] The implementation principle of a sludge dewatering device for sewage treatment according to an embodiment of this application is as follows: When dewatering sludge, the sludge to be dewatered is conveyed to the gap between two adjacent filter plate frames 22 through the sludge feeding assembly 3. Then, a reciprocating electric cylinder 232 drives one of the end filter plate frames 22 to move. Since the adjacent filter plate frames 22 are connected by a return spring 231, the reciprocating electric cylinder 232 can simultaneously drive multiple filter plate frames 22 to move closer to each other and squeeze, thereby forming a strong squeezing and pressing effect on the sludge. The filter screen 222 filters the water pressed out by the sludge. The wastewater produced by filtration enters the filter plate frame 22. The wastewater collected in multiple filter plate frames 22 is collected through the telescopic hose 224 and then discharged and collected through the drain pipe 225.

[0046] After the filter press is completed, the telescopic rod of the reciprocating electric cylinder 232 retracts, causing one of the filter plate frames 22 at the end to reset. Then, the filter plate frame 22 can pull multiple filter plate frames 22 to move synchronously through the reset spring 231, thereby resetting multiple filter plate frames 22. During the reset process of the filter plate frame 22, the first adsorption magnet 227 and the second adsorption magnet 228 attract each other, providing a certain pulling force, which stretches the mud discharge spring 226. As the reciprocating electric cylinder 232 continues to retract, and due to the maximum elastic force of the mud discharge spring 226... The attraction between the first adsorption magnet 227 and the second adsorption magnet 228 is greater than that between the two magnets. Therefore, as the reciprocating electric cylinder 232 continues to contract, the first adsorption magnet 227 and the second adsorption magnet 228 separate. Due to the elastic vibration of the sludge discharge spring 226 after its return, the sludge adhering to the filter screen 222 is shaken off. The demolding electric cylinder 25 drives the demolding scraper 24 to slide, so that the discharge hole 241 on the demolding scraper 24 connects with the sludge discharge hole 213 at the bottom of the filter press box 21, allowing the sludge to be discharged smoothly and collected in the sludge collection trough 242. After the sludge is discharged, the demolding electric cylinder 25 drives the demolding scraper 24 to slide, so that the demolding scraper 24 blocks the sludge discharge hole 213 at the bottom of the filter press box 21, thereby conveying the sludge to be treated to the gap between two adjacent filter plate frames 22 for further filtration.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sludge dewatering device for sewage treatment, characterized in that: The system includes a base (1), a sludge inlet assembly (3), and a filter press assembly (2). The filter press assembly (2) is located on the base (1) and includes a filter press box (21), a filter plate frame (22), a drive component (23), and a drainage component. The filter press box (21) is located on the base (1) and is fixedly connected to the base (1). Multiple filter plate frames (22) are provided, and the multiple filter plate frames (22) are spaced apart along the length of the bottom wall of the filter press box (21) and are located at intervals from the filter press box (21). The bottom wall is slidably connected, and the filter plate frame (22) is wrapped with a filter screen (222). The filter screen (222) and the filter plate frame (22) are fixedly connected by screws. The driving component (23) is used to drive the filter plate frame (22) to slide. The drainage component is connected to the filter plate frame (22). The drainage component is used to discharge the water from the sludge removal box (21) and the sludge inlet assembly (3) is used to transport the sludge to the gap between two adjacent filter plate frames (22). The filter press box (21) has a sliding groove (212) on its side wall. The filter plate frame (22) is fixedly connected to a slider (223) on its side wall. The filter plate frame (22) is slidably connected to the sliding groove (212) through the slider (223). The driving component (23) includes a return spring (231) and a reciprocating electric cylinder (232). There are multiple return springs (231). Two adjacent filter plate frames (22) are fixedly connected through the return springs (231). The return springs (231) are located in the sliding groove (212). The return springs (231) have the tendency to drive the distance between two adjacent filter plate frames (22) to increase. The cylinder body of the reciprocating electric cylinder (232) is fixedly connected to the outer wall of the filter press box (21). One end of the telescopic rod of the reciprocating electric cylinder (232) extends into the filter press box (21) and is fixedly connected to one of the filter plate frames (22) at the end. The filter plate frame (22) is provided with a plurality of mud discharge springs (226). The mud discharge springs (226) are horizontally arranged and located inside the filter screen (222). The two ends of the mud discharge springs (226) are fixedly connected to the filter screens (222) on both sides respectively. The free length of the mud discharge springs (226) is equal to the thickness of the filter plate frame (22). The filter plate frame (22) is provided with a tension member at the end of the mud discharge springs (226). The tension member is used to stretch the mud discharge springs (226). The tensioning member includes a first adsorption magnet (227) and a second adsorption magnet (228). The first adsorption magnet (227) is fixedly connected to the end of the mud discharge spring (226) on the left filter plate frame (22), and the second adsorption magnet (228) is fixedly connected to the end of the mud discharge spring (226) on the right filter plate frame (22). The second adsorption magnet (228) and the first adsorption magnet (227) are correspondingly arranged and attract each other. The maximum elastic force of the mud discharge spring (226) is greater than the attraction force between the first adsorption magnet (227) and the second adsorption magnet (228).

2. The sludge dewatering equipment for sewage treatment according to claim 1, characterized in that: The filter press assembly (2) also includes a demolding scraper (24) and a demolding electric cylinder (25). The demolding scraper (24) is located at the bottom of the filter press box (21) and is slidably connected to the filter press box (21). The demolding electric cylinder (25) is used to drive the demolding scraper (24) to slide. The bottom wall of the filter press box (21) is provided with a mud discharge hole (213) between two adjacent filter plate frames (22). The demolding scraper (24) is provided with a discharge hole (241) corresponding to the mud discharge hole (213). The bottom of the demolding scraper (24) is provided with a mud collection trough (242).

3. The sludge dewatering equipment for sewage treatment according to claim 1, characterized in that: The end of the first adsorption magnet (227) is set to be tapered, and the end of the second adsorption magnet (228) is set to be a tapered groove (2281) that matches the end of the first adsorption magnet (227).

4. A sludge dewatering device for sewage treatment according to claim 3, characterized in that: The second adsorption magnet (228) has multiple dispersion holes (2282) through the inner wall of the conical groove (2281).

5. A sludge dewatering device for sewage treatment according to claim 1, characterized in that: The sludge feeding assembly (3) includes a sludge pump (31) and a sludge pipe (32). The sludge pump (31) is located on the base (1). The inlet of the sludge pump (31) is fixedly connected to the sludge inlet pipe (311). The outlet of the sludge pump (31) is fixedly connected to the sludge pipe (32). The outlet of the sludge pipe (32) is connected to the filter press box (21).

Images