Sludge dewatering device for water plant and treatment process thereof

Abstract

The application belongs to the technical field of sludge treatment, and particularly relates to a sludge dewatering device for water plants and a treatment process thereof, which comprises a support, a feeding mechanism installed on the support, an auxiliary mechanism arranged on the left upper end of the support, a dewatering mechanism arranged on the right upper end of the support, a water collecting tank fixedly connected to the lower end of the support, and a cleaning mechanism arranged above the water collecting tank. The auxiliary mechanism comprises a shell group, which is fixedly connected to the top surface of the support by a support rod. The upper end of the shell group is provided with a stirring part, the lower end of the shell group is provided with a first discharging part, the top surface of the shell group is provided with a second discharging part, and the second discharging part is provided with an adjusting part. The sludge dewatering efficiency and quality are significantly improved by the precise mixing, intelligent dosing and self-cleaning system, and the cost and labor intensity are reduced.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, specifically relating to a sludge dewatering device for water plants and its treatment process. Background Technology

[0002] In the process of urban wastewater treatment, a large amount of sludge with high water content is generated. This sludge usually needs to be dewatered to reduce its water content, thereby reducing transportation costs and facilitating subsequent resource utilization or safe disposal. Currently, common sludge dewatering equipment mainly includes belt filter presses, centrifugal filter presses, plate and frame filter presses, and screw presses.

[0003] However, in actual use, belt filter presses inevitably encounter some problems over time and with continuous operation. One common issue is that, after prolonged use, some impurities gradually accumulate in the filter pores of the conveyor belt (filter cloth). This accumulation leads to a gradual decrease in the permeability of the conveyor belt because the filter pores are clogged, preventing some water in the sludge from passing through and being discharged in time. This significantly reduces the dewatering effect of the belt filter press and affects the efficiency of the entire sludge treatment process.

[0004] In the treatment of highly contaminated sludge, it is usually necessary to add additional disinfectants, such as lime, to ensure thorough mixing with the sludge and effective disinfection. However, currently, in most cases, the application of disinfectants still relies on manual operation. This not only increases the labor intensity of workers but also makes it impossible to accurately control the amount of disinfectant used, resulting in waste. For example, it is impossible to flexibly adjust the amount of disinfectant according to the specific degree of sludge contamination to achieve both economical and efficient disinfection. Summary of the Invention

[0005] The purpose of this invention is to provide a sludge dewatering device and its treatment process for water plants. Through precise mixing, intelligent dosing and a self-cleaning system, it significantly improves the efficiency and quality of sludge dewatering while reducing costs and labor intensity.

[0006] The specific technical solution adopted by this invention is as follows: A sludge dewatering device for a water plant includes a support frame and a material conveying mechanism installed on the support frame; An auxiliary mechanism is located on the upper left side of the support. A dehydration mechanism is located on the upper right side of the support frame; A water collection tank, which is fixedly connected to the lower end of the support, is used to collect the sewage squeezed out of the sludge; A cleaning mechanism, located above the water collection tank, is used to clean the material conveying mechanism; The auxiliary mechanism includes a shell assembly, which is fixedly connected to the top surface of the support by a support rod. A stirring part is installed at the upper end of the shell assembly, a first feeding part is installed at the lower end of the shell assembly, a second feeding part is installed on the top surface of the shell assembly, and an adjustment part is installed on the second feeding part.

[0007] In a preferred embodiment, the material conveying mechanism includes a drive roller and a guide roller, both of which are rotatably connected to a support via bearings. A conveyor belt is fitted onto the drive roller and the guide roller. Support rollers are also rotatably connected to the upper end of the support via bearings in an array. A first gear is fixedly installed at the rear end of each drive roller, and a second gear is fixedly installed at the front end of one of the drive rollers.

[0008] In a preferred embodiment, the shell assembly includes a mixing chamber and a feeding chamber, the mixing chamber being fixedly connected to a support by a support rod, and the feeding chamber being connected to the lower end of the mixing chamber.

[0009] In a preferred embodiment, the stirring unit includes stirring rods, both of which are rotatably connected to the mixing chamber via bearings. The stirring rods are provided with stirring teeth arranged in an array. A motor is fixedly installed on the front side of the mixing chamber, and the output shaft of the motor is fixedly connected to the central shaft of one of the stirring rods. A third gear is fixedly installed at the front end of each of the two stirring rods, and a fourth gear and a fifth gear are respectively installed at the rear end of the two stirring rods.

[0010] In a preferred embodiment, the first feeding part includes a first round rod, which is rotatably connected to the feeding box via bearings. Multiple partitions are connected in a ring on the first round rod, and a sixth gear is fixedly installed at both ends of the first round rod.

[0011] In a preferred embodiment, the second feeding section includes a storage box, which is fixedly connected to the top surface of the mixing box and communicates with the mixing box. The front and rear ends of the storage box are rotatably connected to second round rods via bearings. A feeding roller is fixedly connected between the two second round rods. A seventh gear is fixedly installed at one end of the rear second round rod. The outer surface of the feeding roller has storage grooves distributed in a ring, and the inside of the feeding roller has circular grooves.

[0012] In a preferred embodiment, the adjusting part includes a rotating rod, which is rotatably connected to the inner wall of the feeding roller via a bearing. One end of the rotating rod extends through the second round rod to the outer side of the storage box, and the rotating rod is rotatably connected to the second round rod. Both ends of the rotating rod are fitted with wire blocks, and connecting rods are hinged to the wire blocks in a ring. A push plate is slidably connected inside the storage groove of the feeding roller, and the push plate is hinged to the other end of the connecting rod. A guide rod is fixedly connected to the inner wall of the feeding roller, and a guide block is fixedly connected to the wire block, and the guide block is slidably connected to the guide rod.

[0013] In a preferred embodiment, the dehydration mechanism includes a U-shaped frame fixedly connected to a support. An electric push rod is fixedly installed at the upper end of the U-shaped frame, and a pressure plate is fixedly connected to the lower end of the electric push rod. A slider is fixedly connected to the pressure plate, and a sliding rod is slidably connected to the slider. A sleeve is fixedly connected to the lower end of the sliding rod, and the sleeve is slidably fitted onto the outside of the slider. A compression spring is fitted onto the outer wall of the lower end of the sliding rod.

[0014] In a preferred embodiment, the cleaning mechanism includes fixed bases, two of which are fixedly connected to the top surface of a support frame. Cleaning rollers are rotatably connected to the two fixed bases via bearings. A water storage pipe is fixedly connected to one side of each fixed base via a support rod. Spray nozzles are connected to the water storage pipe in an array. A hollow shell is also fixedly connected to each fixed base via a support rod. The rotating shaft of the cleaning roller extends into the hollow shell and is rotatably connected to the hollow shell via a sealed bearing. A water supply pipe connects the hollow shell and the water storage pipe. A collection box is fixedly connected to the lower end of the water collection tank. A filter screen is fixedly connected to the upper inner wall of the collection box. A water pump is fixedly installed on the bottom surface of the collection box. The pump's suction end is connected to the collection box. The pump's discharge end is connected to a drainage pipe, which is connected to the hollow shell. A water wheel is fixedly installed at the end of the cleaning roller located inside the hollow shell.

[0015] A sludge dewatering process for water treatment plants, applied to the aforementioned sludge dewatering device for water treatment plants, includes the following steps: Step 1: First, put sludge into the mixing box and start the motor forward drive, which will drive the fifth gear to rotate synchronously. The fifth gear will drive the second feeding part to operate, so that lime powder is added into the mixing box at the same time as sludge is put in. The amount of lime powder added can be adjusted according to the degree of pollution of sludge through the adjustment part. Step 2: The motor rotates and drives the mixing unit to stir the added lime powder and sludge, and crushes large pieces of sludge. Step 3: After the sludge feeding is completed, control the motor to reverse and synchronously drive the fourth gear. The fourth gear drives the first feeding part to operate, quantitatively feeding sludge onto the conveying mechanism. When the first feeding part is operating, it will drive the conveying mechanism to transport the sludge. Step 4: When the sludge is conveyed to the bottom of the dewatering mechanism, turn off the motor. At this time, the conveyor belt will no longer transport the sludge, and the dewatering mechanism will press down on the sludge to dewater it. Step 5: When the conveyor belt rotates to the cleaning mechanism, the conveyor belt is cleaned by the cleaning mechanism.

[0016] The technical effects achieved by this invention are as follows: This invention uses a water pump to draw filtered clean water from a collection tank, and then uses a spray nozzle to perform high-pressure rinsing on the conveyor belt. Simultaneously, the water flow drives a water wheel to rotate a cleaning roller, whose bristles penetrate deep into the filter pores to remove impurities. This dual mechanism of "pre-cleaning + rinsing" effectively avoids filter clogging, ensures rapid water penetration during sludge dewatering, and significantly improves the long-term stability and dewatering efficiency of the equipment. This invention achieves precise control through an adjustment unit and a second feeding unit. The adjustment unit employs a screw drive structure, adjusting the distance between the push plates by rotating the lever to dynamically change the capacity of the material storage trough on the conveying roller, thereby adjusting the amount of lime powder added as needed. Simultaneously, the second feeding unit is linked to the mixing unit via gear transmission, ensuring that the lime powder is added synchronously and quantitatively with the sludge mixing, and improving the uniformity of agent dispersion through the crushing and mixing action of the mixing teeth. This not only achieves precise matching of disinfectant dosage (adjusted according to the degree of sludge contamination) but also reduces human error through automated dosing, improving disinfection efficiency and economy. This invention connects the auxiliary mechanism, conveying mechanism, and dewatering mechanism in series through a gear transmission system, forming a highly efficient and coordinated automated process. The forward rotation of the motor drives the mixing section to mix sludge and chemicals, while simultaneously dispensing disinfectant through a gear-driven second feeding section. Reverse rotation drives the first feeding section to dispense a measured amount of material and simultaneously activates the conveying mechanism, achieving uniform sludge transport. The dewatering mechanism uses an electric push rod and slide rail combination to adaptively adjust the pressure of the pressure plate. Combined with a pre-covered casing design, this prevents sludge leakage and improves extrusion stability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the material conveying mechanism of the present invention; Figure 3 This is a top-down view of the entire invention; Figure 4 This is a partial structural schematic diagram of the cleaning mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the hollow shell of the present invention; Figure 6 This is a rear view of the entire invention; Figure 7 This is a schematic diagram of the auxiliary mechanism of the present invention; Figure 8This is a schematic diagram of the internal structure of the shell assembly of the present invention; Figure 9 This is a schematic diagram of the internal structure of the storage box of the present invention; Figure 10 This is a front sectional view of the storage box of the present invention; Figure 11 This is a partial structural schematic diagram of the adjustment part of the present invention; Figure 12 This is a schematic diagram of the dehydration mechanism of the present invention; Figure 13 This is the present invention. Figure 12 An enlarged schematic diagram of part A shown in the image; Figure 14 This is a schematic diagram of the connection between the stirring rod and the gear of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Support frame; 2. Conveying mechanism; 3. Auxiliary mechanism; 4. Dewatering mechanism; 5. Water collection tank; 6. Cleaning mechanism; 21. Drive roller; 22. Guide roller; 23. Conveyor belt; 24. Support roller; 25. First gear; 26. Second gear; 31. Shell assembly; 32. Stirring section; 33. First feeding section; 34. Second feeding section; 35. Adjustment section; 311. Mixing box; 312. Discharge box; 321. Stirring rod; 322. Stirring teeth; 323. Motor; 324. Third gear; 325. Fourth gear; 326. Fifth gear; 331. First round rod; 332. Partition plate; 333. Sixth gear; 341. Storage box; 342. Second round rod; 343. Feeding roller; 344. Seventh gear; 351. Rotating rod; 352. Threaded block; 353. Connecting rod; 354. Push plate; 355. Guide rod; 356. Guide block; 41. U-shaped frame; 42. Electric push rod; 43. Pressure plate; 44. Slider; 45. Slide rod; 46. Housing; 47. Compression spring; 61. Fixture; 62. Cleaning roller; 63. Water storage pipe; 64. Nozzle; 65. Hollow shell; 66. Water supply pipe; 67. Collection box; 68. Water pump; 69. Drainage pipe; 610. Water wheel. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0023] Please see the appendix Figures 1 to 7 As shown, this embodiment provides a sludge dewatering device for a water plant, including a support 1 and a conveying mechanism 2 installed on the support 1; an auxiliary mechanism 3, which is located on the upper left side of the support 1; a dewatering mechanism 4, which is located on the upper right side of the support 1; a water collection tank 5, which is fixedly connected to the lower end of the support 1 and is used to collect the wastewater squeezed out of the sludge; and a cleaning mechanism 6, which is located above the water collection tank 5 and is used to clean the conveying mechanism 2. The auxiliary mechanism 3 includes a shell assembly 31, which is fixedly connected to the top surface of the support 1 by a support rod. A stirring part 32 is installed at the upper end of the shell assembly 31, a first feeding part 33 is installed at the lower end of the shell assembly 31, a second feeding part 34 is installed on the top surface of the shell assembly 31, and an adjustment part 35 is installed on the second feeding part 34.

[0024] Secondly, please refer to again Figure 1 and 2 The material conveying mechanism 2 includes a drive roller 21 and a guide roller 22. Both the drive roller 21 and the guide roller 22 are rotatably connected to the support 1 via bearings. A conveyor belt 23 is fitted onto the drive roller 21 and the guide roller 22. Support rollers 24 are also rotatably connected to the upper end of the support 1 via bearings in an array. A first gear 25 is fixedly installed at the rear end of each drive roller 21, and a second gear 26 is fixedly installed at the front end of one of the drive rollers 21.

[0025] In this embodiment, the conveyor belt 23 is driven by the rotation of the drive roller 21, the guide roller 22 precisely guides the conveyor belt 23, and the support roller 24 provides necessary support to the conveyor belt 23 to prevent it from collapsing. Furthermore, the first gears 25 on the two drive rollers 21 are connected by a toothed belt drive, ensuring that when one drive roller 21 rotates, the other drive roller 21 rotates synchronously.

[0026] It should be noted that the conveyor belt 23 has filter holes, allowing water to pass through.

[0027] Secondly, please refer to Figure 8 The shell assembly 31 includes a mixing box 311 and a feeding box 312. The mixing box 311 is fixedly connected to the support 1 by a support rod, and the feeding box 312 is connected to the lower end of the mixing box 311.

[0028] In this embodiment, the mixing tank 311 is used to mix the reagent with the sludge. The sludge and reagent are fully integrated by stirring to improve the efficiency of sludge dewatering. The discharge tank 312 is designed below the mixing tank 311 to facilitate the smooth discharge of the mixed sludge into the subsequent dewatering treatment stage.

[0029] Secondly, please refer to again Figures 5 to 7 The stirring unit 32 includes stirring rods 321. Both stirring rods 321 are rotatably connected to the mixing box 311 via bearings. Stirring teeth 322 are arranged in an array on the stirring rods 321. A motor 323 is fixedly installed on the front of the mixing box 311, and the output shaft of the motor 323 is fixedly connected to the central shaft of one of the stirring rods 321. A third gear 324 is fixedly installed at the front end of each of the two stirring rods 321, and a fourth gear 325 and a fifth gear 326 are respectively installed at the rear end of the two stirring rods 321. In addition, the stirring teeth 322 on the two stirring rods 321 are evenly spaced and staggered, which can improve the stirring and crushing effect.

[0030] In this embodiment, the sludge to be treated is poured into the mixing tank 311, and the motor 323 is started simultaneously. The motor 323 drives one of the stirring rods 321 to rotate, and the third gear 324 at the front end of the two stirring rods 321 meshes to achieve synchronous relative rotation of the two stirring rods 321. The rotation of the stirring rods 321 drives the stirring teeth 322 to rotate, thus stirring and breaking up the sludge.

[0031] It should be noted that in this design, both the fourth gear 325 and the fifth gear 326 are connected to the stirring rod 321 via a pawl-ratchet mechanism. The function of this pawl-ratchet mechanism is to restrict the fourth gear 325 and the fifth gear 326 to rotate only in one direction. Specifically, when the motor 323 rotates in the forward direction, the stirring section 32 will start, stirring and crushing the input sludge, while simultaneously driving the fifth gear 326 to rotate. Conversely, when the motor 323 rotates in the reverse direction, the stirring section 32 will also stir and crush the sludge, but at this time the fourth gear 325 will rotate with the stirring action. In this way, regardless of whether the motor 323 rotates in the forward or reverse direction, the stirring section 32 can be effectively used to process the sludge, while ensuring the unidirectional rotation of one gear, thus guaranteeing the stability and efficiency of the entire system (see reference). Figure 14 The pawl-ratchet mechanism is common knowledge in the prior art, and those skilled in the art should understand it, so it will not be elaborated further here.

[0032] Please refer to it again. Figure 1 , Figure 6 and Figure 8 The first feeding part 33 includes a first round rod 331, which is rotatably connected to the feeding box 312 via a bearing. Multiple partitions 332 are connected in a ring on the first round rod 331, and a sixth gear 333 is fixedly installed at both ends of the first round rod 331.

[0033] In this embodiment, the fourth gear 325 and the sixth gear 333 are connected by a toothed belt drive. When the fourth gear 325 rotates, it synchronously drives the first round rod 331 to rotate. The rotation of the first round rod 331 drives the partition plate 332 to rotate. After the sludge in the mixing box 311 falls between the two partition plates 332, the sludge can be conveyed between the two partition plates 332 as the first round rod 331 drives the partition plate 332 to rotate. When the partition plate 332 storing the sludge rotates to the opening position of the discharge box 312, the sludge separates from the two partition plates 332 and is discharged through the opening of the discharge box 312, and then falls onto the conveyor belt 23. This method can achieve quantitative feeding, ensure that the sludge is evenly distributed on the conveyor belt 23, avoid sludge accumulation, and facilitate subsequent dewatering treatment.

[0034] Please refer to it again. Figure 6 , Figure 9 and Figure 10The second feeding section 34 includes a storage box 341, which is fixedly connected to the top surface of the mixing box 311 and communicates with the mixing box 311. The front and rear ends of the storage box 341 are rotatably connected to a second round rod 342 through bearings. A feeding roller 343 is fixedly connected between the two second round rods 342. A seventh gear 344 is fixedly installed at one end of the rear second round rod 342. The outer surface of the feeding roller 343 is provided with a storage groove in a ring, and the inside of the feeding roller 343 is provided with a circular groove.

[0035] In this embodiment, the fifth gear 326 and the seventh gear 344 are driven by a toothed belt. When the fifth gear 326 rotates, it synchronously drives the second round rod 342 to rotate, which in turn drives the conveying roller 343 to rotate. First, lime powder is added into the storage box 341, and sludge is added into the mixing box 311 and stirred. As the conveying roller 343 rotates, the lime powder is quantitatively added into the mixing box 311 (the lime powder at the top of the storage box 341 will fall into the storage trough above the conveying roller 343, and when the storage trough rotates to the bottom, the lime powder will fall and be discharged into the mixing box 311). The disinfection effect is achieved by mixing the lime powder and the sludge.

[0036] Please refer to it again. Figures 9 to 11 The adjusting part 35 includes a rotating rod 351, which is rotatably connected to the inner wall of the feeding roller 343 via a bearing. One end of the rotating rod 351 extends through the second round rod 342 to the outside of the storage box 341. The rotating rod 351 is rotatably connected to the second round rod 342. Both ends of the rotating rod 351 are fitted with wire blocks 352. Connecting rods 353 are hinged in a ring on the wire blocks 352. A push plate 354 is slidably connected in the storage trough of the feeding roller 343. The push plate 354 is hinged to the other end of the connecting rod 353. A guide rod 355 is fixedly connected to the inner wall of the feeding roller 343. A guide block 356 is fixedly connected to the wire blocks 352. The guide block 356 is slidably connected to the guide rod 355.

[0037] In this embodiment, the operator can achieve its function by rotating the rotating rod 351. The outer walls at both ends of the rotating rod 351 are provided with threads in opposite directions, and the rotating rod 351 is threadedly connected to the wire block 352. A guide block 356 is fixed on the wire block 352, which is slidably connected to the guide rod 355 to limit the movement direction of the wire block 352. Therefore, when the rotating rod 351 rotates, it can drive the two wire blocks 352 to move closer or further apart. When the rotating rod 351 rotates in the forward direction, the two wire blocks 352 move closer together, and the four push plates 354 move away from each other through the connecting rod 353. After the push plates 354 move away, the storage space on the conveying roller 343 shrinks, causing the conveying roller 343 to convey only a small amount of lime powder per revolution. Conversely, when the rotating rod 351 reverses, the two wire blocks 352 move away from each other, while the four push plates 354 move closer together. This increases the storage space on the conveying roller 343, allowing it to deliver more lime powder per revolution. In this way, the amount of lime powder added can be precisely controlled, adjusting the amount according to the degree of sludge contamination to achieve precise control over the sludge disinfection effect and reduce lime powder waste. Furthermore, within the mixing box 311, the stirring section 32 ensures a more uniform mixture of sludge and lime powder, thereby improving the sludge disinfection effect.

[0038] In addition, the sixth gear 333 on the first round rod 331 is connected to the second gear 26 on the drive roller 21 by a toothed belt drive. When the first round rod 331 rotates, it can synchronously drive the drive roller 21 to rotate, so that the conveying mechanism 2 can operate and convey the sludge.

[0039] Specifically, during the process of adding sludge to the mixing tank 311, the motor 323 is first started to rotate forward, which synchronously drives the fifth gear 326 to rotate, thereby causing the second feeding section 34 to start working. Simultaneously with the sludge addition, lime powder is added to the mixing tank 311 through the second feeding section 34, and the sludge and lime powder are mixed using the stirring section 32. The amount of lime powder added can be precisely adjusted according to the degree of sludge contamination using the adjusting section 35. When the motor 323 reverses direction, it synchronously drives the fourth gear 325, which in turn drives the first feeding section 33 to start operating, realizing the quantitative sludge addition to the conveying mechanism 2. Furthermore, the first feeding section 33 drives the conveying mechanism 2 during operation, thus simultaneously conveying the sludge through the conveying mechanism 2 while it is being added.

[0040] Please refer to it again. Figure 12 and Figure 13The dehydration mechanism 4 includes a U-shaped frame 41, which is fixedly connected to the support 1. An electric push rod 42 is fixedly installed at the upper end of the U-shaped frame 41. A pressure plate 43 is fixedly connected at the lower end of the electric push rod 42. A slider 44 is fixedly connected to the pressure plate 43. A slide rod 45 is slidably connected to the slider 44. A sleeve 46 is fixedly connected to the lower end of the slide rod 45, and the sleeve 46 is slidably sleeved on the outside of the slider 44. A compression spring 47 is sleeved on the outer wall of the lower end of the slide rod 45.

[0041] In this embodiment, when the sludge is conveyed to the area below the dewatering mechanism 4, the motor 323 should be turned off, at which point the conveyor belt will stop conveying the sludge. By controlling the extension of the electric push rod 42, the pressure plate 43 is driven to move downwards, and the descent of the pressure plate 43 causes the casing 46 to move downwards synchronously. Since the casing 46 is positioned lower than the pressure plate 43, it will contact the support 1 and the conveyor belt 23 before it does, thereby covering the sludge to be pressed and preventing it from spreading outwards during the pressing process. Subsequently, as the electric push rod 42 continues to extend, the casing 46 reaches its limit and can no longer move further, while the pressure plate 43 continues to descend, and the slider 44 on it moves downwards along the slide rod 45, compressing the compression spring 47. When the pressure plate 43 reaches the appropriate position, it will apply pressure to the sludge on the conveyor belt 23, thereby squeezing out the water from the sludge. After the pressing is completed, by controlling the retraction of the electric push rod 42, the pressure plate 43 and the casing 46 are reset. Next, the motor 323 is restarted to drive the conveying mechanism 2 to transport and discharge the dewatered sludge backward. At the same time, the first feeding section 33 feeds new sludge to be dewatered onto the conveyor belt 23.

[0042] Please refer to it again. Figures 1 to 5 The cleaning mechanism 6 includes two fixed bases 61, both of which are fixedly connected to the top surface of the bracket 1. Cleaning rollers 62 are rotatably connected to the two fixed bases 61 via bearings. A water storage pipe 63 is fixedly connected to one side of the fixed base 61 via a support rod. Spray nozzles 64 are connected to the water storage pipe 63 in an array. A hollow shell 65 is also fixedly connected to the fixed base 61 via a support rod, and the rotating shaft of the cleaning roller 62 extends into the hollow shell 65 and is rotatably connected to the hollow shell 65 via a sealed bearing. A water supply pipe 66 connects the hollow shell 65 and the water storage pipe 63. A collection box 67 is fixedly connected to the lower end of the water collection tank 5, and a filter screen is fixedly connected to the upper inner wall of the collection box 67. A water pump 68 is fixedly installed on the bottom surface of the collection box 67, and the water pump 68's suction end is connected to the collection box 67. The water pump 68's discharge end is connected to a drain pipe 69, and the drain pipe 69 is connected to the hollow shell 65. A water wheel 610 is fixedly installed on one end of the cleaning roller 62 located inside the hollow shell 65.

[0043] In this embodiment, the wastewater squeezed out of the sludge flows into the collection tank 5 after passing through the conveyor belt 23. After a period of use, the water pump 68 is activated to extract the filtered water from the collection box 67. The water is then discharged into the hollow shell 65 through the drain pipe 69, and from there through the water supply pipe 66 into the storage pipe 63. Finally, the water is sprayed from the nozzle 64 on the storage pipe 63 to rinse the conveyor belt, preventing filter blockage and ensuring that the wastewater squeezed out of the sludge can smoothly pass through the conveyor belt 23. As the water flows through the hollow shell 65, it drives the water wheel 610 to rotate, which in turn drives the cleaning roller 62 to rotate synchronously. During rotation, the bristles of the cleaning roller 62 penetrate deep into the filter holes of the conveyor belt 23 to remove impurities. In this way, the conveyor belt 23 can be pre-cleaned before rinsing, thereby improving the effect of subsequent rinsing and further enhancing cleaning efficiency.

[0044] A sludge dewatering process for water treatment plants, applied to the aforementioned sludge dewatering device for water treatment plants, includes the following steps: Step 1: First, put sludge into the mixing box 311 and start the motor 323 forward drive, which synchronously drives the fifth gear 326 to rotate. The fifth gear 326 drives the second feeding part 34 to operate, so that lime powder is added into the mixing box 311 at the same time as sludge is put in. The amount of lime powder can be adjusted according to the degree of pollution of the sludge through the adjustment part 35. Step 2: The motor 323 rotates, driving the mixing unit 32 to mix the added lime powder and sludge, and crushing large pieces of sludge. Step 3: After the sludge feeding is completed, control motor 323 to reverse and synchronously drive the fourth gear 325. The fourth gear 325 drives the first feeding part 33 to operate, quantitatively feeding sludge onto the conveying mechanism 2. When the first feeding part 33 is operating, it will drive the conveying mechanism 2 to operate and transport the sludge. Step 4: When the sludge is conveyed to the bottom of the dewatering mechanism 4, turn off the motor 323. At this time, the conveyor belt 23 will no longer transport the sludge, and the sludge will be dewatered by pressing down the dewatering mechanism 4. Step 5: When the conveyor belt 23 rotates to the cleaning mechanism 6, the cleaning mechanism 6 cleans the conveyor belt 23.

[0045] The working principle of this invention is as follows: First, sludge and lime powder are thoroughly mixed and crushed in the mixing tank 311 by the stirring unit 32 to improve subsequent dewatering efficiency. The amount of lime powder added is precisely controlled by the regulating unit 35 to optimize the disinfection effect. Next, the mixed sludge is quantitatively fed onto the conveying mechanism 2 through the first feeding unit 33 to ensure uniform distribution. The conveying mechanism 2 uses a drive roller 21, guide roller 22, and support roller 24 in conjunction with the conveyor belt 23 to smoothly transport the sludge to the bottom of the dewatering mechanism 4. The dewatering mechanism 4 applies pressure to the sludge by driving the pressure plate 43 through the electric push rod 42, squeezing out the water and collecting it in the water collection tank 5. Finally, the cleaning mechanism 6 starts the water pump 68 to draw water filtered through the filter screen and washes the conveyor belt 23 through the nozzle 64. At the same time, the rotating cleaning roller 62 removes impurities from the filter holes to ensure unobstructed flow of the conveyor belt 23. The entire process realizes automated treatment of sludge from mixing, dewatering to cleaning, greatly improving the efficiency and quality of sludge treatment in water plants.

[0046] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A sludge dewatering device for water treatment plants, characterized in that: This includes the support frame and the material conveying mechanism mounted on the support frame; The auxiliary mechanism is located on the upper left side of the support frame; The dehydration mechanism is located on the upper right side of the support frame; The water collection tank is fixedly connected to the lower end of the support frame and is used to collect the sewage squeezed out of the sludge. The cleaning mechanism is located above the water collection tank and is used to clean the material conveying mechanism. The auxiliary mechanism includes a shell assembly, which is fixedly connected to the top surface of the support by a support rod. A stirring part is installed at the upper end of the shell assembly, a first feeding part is installed at the lower end of the shell assembly, a second feeding part is installed on the top surface of the shell assembly, and an adjusting part is installed on the second feeding part to adjust the amount of lime powder added. The material conveying mechanism includes a drive roller and a guide roller. Both the drive roller and the guide roller are rotatably connected to the support through bearings. A conveyor belt is fitted on the drive roller and the guide roller. Support rollers are also rotatably connected to the upper end of the support in an array through bearings. A first gear is fixedly installed at the rear end of each drive roller. The first gears on two drive rollers are connected by a toothed belt drive. A second gear is also fixedly installed at the front end of one of the drive rollers. The shell assembly includes a mixing chamber and a feeding chamber. The mixing chamber is fixedly connected to the support by a support rod, and the feeding chamber is connected to the lower end of the mixing chamber. The mixing unit includes two mixing rods, both of which are rotatably connected to the mixing box via bearings. The mixing rods are provided with mixing teeth arranged in an array. A motor is fixedly installed on the front of the mixing box, and the output shaft of the motor is fixedly connected to the central rotating shaft of one of the mixing rods. A third gear is fixedly installed at the front end of each of the two mixing rods. The third gears at the front end of the two mixing rods are meshed to achieve synchronous relative rotation of the two mixing rods. A fourth gear and a fifth gear are respectively installed at the rear end of the two mixing rods. The fourth gear and the fifth gear are connected to the mixing rods via a pawl-ratchet mechanism. When the motor rotates in the forward direction, the mixing unit starts to mix and crush the sludge, and at the same time drives the fifth gear to rotate. When the motor rotates in the reverse direction, the mixing unit will also mix and crush the sludge, but at this time it drives the fourth gear to rotate with the mixing action. The first feeding section includes a first round rod, which is rotatably connected to the feeding box via bearings. Multiple partitions are connected in a ring on the first round rod. A sixth gear is fixedly installed at both ends of the first round rod. A fourth gear is connected to one of the sixth gears via a toothed belt drive. Another sixth gear on the first round rod is connected to a second gear on the drive roller via a toothed belt drive. The second feeding section includes a storage box, which is fixedly connected to the top surface of the mixing box and communicates with the mixing box. Both the front and rear ends of the storage box are rotatably connected to a second round rod through bearings. A feeding roller is fixedly connected between the two second round rods. A seventh gear is fixedly installed at one end of the rear second round rod. The fifth gear and the seventh gear are driven by a toothed belt. The outer surface of the feeding roller is provided with storage grooves distributed in a ring, and the inside of the feeding roller is provided with a circular groove.

2. The sludge dewatering device for water plants according to claim 1, characterized in that: The adjusting part includes a rotating rod, which is rotatably connected to the inner wall of the feeding roller via a bearing. One end of the rotating rod extends through the second round rod to the outside of the storage box. The rotating rod is rotatably connected to the second round rod. Both ends of the rotating rod are fitted with wire blocks. Connecting rods are hinged to the wire blocks in a ring-shaped arrangement. A push plate is slidably connected inside the storage trough of the feeding roller. The push plate is hinged to the other end of the connecting rod. A guide rod is fixedly connected to the inner wall of the feeding roller. A guide block is fixedly connected to the wire block and is slidably connected to the guide rod.

3. The sludge dewatering device for water plants according to claim 1, characterized in that: The dehydration mechanism includes a U-shaped frame, which is fixedly connected to a support. An electric push rod is fixedly installed at the upper end of the U-shaped frame, and a pressure plate is fixedly connected to the lower end of the electric push rod. A slider is fixedly connected to the pressure plate, and a slide rod is slidably connected to the slider. A sleeve is fixedly connected to the lower end of the slide rod, and the sleeve is slidably fitted on the outside of the slider. A compression spring is fitted on the outer wall of the lower end of the slide rod.

4. The sludge dewatering device for water plants according to claim 1, characterized in that: The cleaning mechanism includes two fixed bases, both of which are fixedly connected to the top surface of the support frame. A cleaning roller is rotatably connected to the two fixed bases via bearings. A water storage pipe is fixedly connected to one side of the fixed base via a support rod. Spray nozzles are connected to the water storage pipe in an array. A hollow shell is also fixedly connected to the fixed base via a support rod. The rotating shaft of the cleaning roller extends into the hollow shell and is rotatably connected to the hollow shell via a sealed bearing. A water supply pipe connects the hollow shell and the water storage pipe. A collection box is fixedly connected to the lower end of the water collection tank. A filter screen is fixedly connected to the upper inner wall of the collection box. A water pump is fixedly installed on the bottom surface of the collection box. The pump's suction end is connected to the collection box. The pump's discharge end is connected to a drain pipe, which is connected to the hollow shell. A water wheel is fixedly installed on the end of the cleaning roller located inside the hollow shell.

5. A sludge dewatering process for water treatment plants, characterized in that: A sludge dewatering device for a water treatment plant, as described in any one of claims 1 to 4, comprises the following steps: Step 1: First, put sludge into the mixing box and start the motor to rotate forward, which will drive the fifth gear to rotate synchronously. The fifth gear will drive the second feeding part to operate, so that lime powder is added into the mixing box at the same time as sludge is put in. The amount of lime powder added is adjusted by adjusting the adjusting part according to the degree of sludge pollution. Step 2: The motor rotates to drive the mixing unit to stir the added lime powder and sludge, and crush large pieces of sludge. Step 3: After the sludge feeding is completed, control the motor to reverse and synchronously drive the fourth gear to rotate. The fourth gear drives the first feeding part to operate, quantitatively feeding sludge onto the conveying mechanism. When the first feeding part is operating, it will drive the conveying mechanism to transport the sludge. Step 4: When the sludge is conveyed to the bottom of the dewatering mechanism, turn off the motor. At this time, the conveyor belt will no longer convey the sludge, and the dewatering mechanism will press down on the sludge to dewater it. Step 5: When the conveyor belt rotates to the cleaning mechanism, the conveyor belt is cleaned by the cleaning mechanism.

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