A sludge dewatering device for sewage treatment

Abstract

The utility model belongs to sewage treatment equipment technical field, specifically disclose a sludge dewatering device for sewage treatment, including support board, the upper surface fixed connection of support board has the fixed frame, the bottom surface fixed connection of fixed frame has hydraulic telescopic link and drive motor, the bottom fixed connection of hydraulic telescopic link has the pressure plate, the bottom surface fixed connection of support board has the dewatering jar, the inner wall fixed connection of support board has the first bearing and the second bearing. The utility model discloses through being provided with the gear column rotation of drive motor output end drive second bearing inner ring, utilizes centrifugal force to separate the moisture in sludge to the rotating cylinder outside fast, through setting up the hydraulic telescopic link of fixed frame bottom and stretching down, the pressure plate of bottom end is pushed to the sludge in the rotating cylinder and is exerted stable pressure, is exported to the sludge while cleaning the inner wall of rotating cylinder, reduces the generation of health dead angle, improves work efficiency and device service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage treatment equipment, specifically a sludge dewatering device for sewage treatment. Background Technology

[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or for reuse. Wastewater treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscaping, medical care, and catering, and is increasingly becoming a part of the daily lives of ordinary people.

[0003] The existing utility model with authorization announcement number CN221565994U discloses a sludge dewatering device for sewage treatment, including a dewatering tank and support legs. The support legs are fixedly installed at the front and rear ends of the bottom of the dewatering tank. A dewatering device is provided inside the dewatering tank. The dewatering device includes a cleaning unit, a dewatering unit and a discharge unit. The cleaning unit is located at the upper end of the inside of the dewatering tank.

[0004] The above technical solution involves setting up a cleaning unit. After the sludge is dewatered, the hydraulic cylinder is activated to drive the hydraulic rod to extend and retract, scraping off the sludge adhering to the inner wall of the dewatering tank. This prevents the sludge from clumping on the inner wall of the dewatering tank and affecting the service life of the mixing shell. However, the above technical solution can only scrape and clean the sludge, but cannot quickly dewater it, resulting in a decrease in sludge dewatering efficiency. In addition, the dewatering tank in the above solution is equipped with many agitators, and sludge easily adheres to the agitators, creating cleaning dead spots. If cleaning is not possible for a long time, personnel need to enter the interior for cleaning.

[0005] Therefore, we propose a device that can quickly separate wastewater from sludge and avoid excessive residual sludge adhering to the internal components. Utility Model Content

[0006] To address the above technical problems, this utility model provides a device that can quickly separate sewage from sludge and prevent excessive residual sludge from adhering to the internal components, thus solving the problem that existing sewage treatment devices require manual entry for processing or that sludge easily adheres to the agitator during mechanical cleaning.

[0007] To solve the above technical problems, the technical solution of this utility model is as follows: a sludge dewatering device for sewage treatment, comprising a support plate, a fixed frame fixedly connected to the upper surface of the support plate, a hydraulic telescopic rod and a drive motor fixedly connected to the bottom surface of the fixed frame, a pressure plate fixedly connected to the output end of the hydraulic telescopic rod, a dewatering tank fixedly connected to the inner wall of the middle part of the support plate, a gear column fixedly connected to the output end of the drive motor, a rotating cylinder rotatably connected inside the dewatering tank, a gear ring fixedly connected to the upper end of the rotating cylinder, the gear column meshing with the gear ring for transmission, a discharge port opened at the bottom of the rotating cylinder, a rotary joint fixedly connected to the bottom of the discharge port, a discharge pipe fixedly connected to the other end of the rotary joint, the discharge pipe extending outward through the bottom of the dewatering tank, a drain valve fixedly connected to the bottom end of the dewatering tank, and several identical leakage holes opened on the outer surface of the rotating cylinder.

[0008] Furthermore, four support rods are fixedly connected to the bottom surface of the support plate, and a fixing ring is fixedly connected to the outer surface of the dehydration tank. The fixing ring is fixedly connected to the bottom of the support plate.

[0009] Furthermore, a reinforcing plate is fixedly connected to the output end of the hydraulic telescopic rod, and the bottom surface of the reinforcing plate is fixedly connected to the top surface of the pressure plate. The size of the pressure plate is the same as the inner diameter of the rotating cylinder.

[0010] Furthermore, a second bearing is fixedly connected to the support plate, and a first bearing is fixedly connected to the inner wall of the upper end of the dehydration tank. The inner ring of the first bearing is fixedly connected to the rotating cylinder, and the inner ring of the second bearing is fixedly connected to the other end of the gear column.

[0011] Furthermore, a slide gate valve is fixedly connected to the discharge pipe.

[0012] Furthermore, the diameter of the leakage holes is 0.1-0.5 mm, and they are evenly distributed on the side wall of the rotating cylinder.

[0013] This utility model has the following advantages compared with the prior art:

[0014] 1. This utility model uses a drive motor output to rotate the gear column of the inner ring of the second bearing. The gear column meshes with the gear ring on the rotating cylinder of the inner ring of the first bearing, driving the rotating cylinder to rotate at high speed. Centrifugal force is used to quickly separate the water in the sludge to the outside of the rotating cylinder, and the wastewater is discharged through the drain valve at the bottom of the dewatering tank, thus separating the sludge and water. By setting a hydraulic telescopic rod at the bottom of the fixed frame, the output end of the hydraulic telescopic rod is extended downward, pushing the pressure plate at the bottom end to apply stable pressure to the remaining sludge in the rotating cylinder and continuously scraping the side wall of the rotating cylinder downward to clean the side wall. This can greatly reduce the amount of sludge residue in the device. Finally, manual rinsing with a high-pressure water gun can avoid the formation of sanitary dead corners and avoid personnel entering the inside of the device for cleaning, which greatly improves work efficiency and equipment lifespan.

[0015] 2. This utility model features several identical perforations on the outer surface of a rotating cylinder, with precisely designed apertures. This design allows the separated water to smoothly permeate into the outer dewatering tank while effectively trapping sludge particles. This prevents sludge from being lost with the water during dewatering, ensuring the integrity of the dewatered sludge and facilitating subsequent processing. A drain valve fixedly connected to the bottom of the dewatering tank enables the directional discharge and centralized collection of the separated wastewater, facilitating secondary purification treatment and preventing secondary pollution caused by indiscriminate discharge of wastewater. This design meets the environmental standards for the entire wastewater treatment process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the pressure plate of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the rotating cylinder of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the leakage hole of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the gear column of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the first bearing of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the dehydration tank of this utility model, viewed from below.

[0023] In the diagram: 1. Support plate, 2. Fixing frame, 3. Support rod, 4. Dehydration tank, 5. Fixing ring, 6. Hydraulic telescopic rod, 7. Gear ring, 8. Pressure plate, 9. Reinforcing plate, 10. Discharge port, 11. Rotary joint, 12. Rotating cylinder, 13. Drive motor, 14. Gear column, 15. First bearing, 16. Leakage hole, 17. Second bearing, 18. Slide valve, 19. Drain valve, 20. Discharge pipe. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1 to 7 The sludge dewatering device for sewage treatment shown includes a support plate 1. A fixing frame 2 is fixedly connected to the upper surface of the support plate 1. The fixing frame 2 is fixedly connected to the support plate 1 via four legs. A hydraulic telescopic rod 6 and a drive motor 13 are fixedly connected to the bottom surface of the fixing frame 2. The hydraulic telescopic rod 6 is fixedly connected to the middle of the bottom surface of the support plate 1, and the drive motor 13 is located on one side of the hydraulic telescopic rod 6. A pressure plate 8 is fixedly connected to the output end of the hydraulic telescopic rod 6. In order to squeeze out the remaining sludge and clean the inner wall of the rotating drum 12 to avoid excessive sludge adhesion, a dewatering tank 4 is fixedly connected to the inner wall of the middle part of the support plate 1. The upper outer side of the dewatering tank 4 is fixedly connected to the support plate 1, and the rest is located below the support plate 1. A gear column 14 is fixedly connected to the output end of the drive motor 13. A gear is provided in the middle of the gear column 14. One end of the gear column 14 is fixedly connected to the output end of the drive motor 13, and the other end is fixedly connected to the second bearing 17. In order to squeeze out the sludge by centrifugal force, a pressure plate 8 is fixedly connected to the output end of the drive motor 13. Sludge and water are separated by a rotating cylinder 12 connected to the dewatering tank 4. A gear ring 7 is fixedly connected to the upper end of the rotating cylinder 12. The gear on the gear column 14 meshes with the gear ring 7 for transmission. In order to facilitate the removal of the remaining sludge, a discharge port 10 is provided at the bottom of the rotating cylinder 12. In order to ensure that the rotating cylinder 12 rotates without causing the discharge pipe 20 at the bottom of the discharge port to rotate, a rotary joint 11 is fixedly connected to the bottom of the discharge port 10. The other end of the rotary joint 11 is fixedly connected to the discharge pipe 20. The discharge pipe 20 extends outward through the bottom of the dewatering tank 4. In order to collect the separated water separately, a drain valve 19 is fixedly connected to the bottom side wall of the dewatering tank 4. The water separated by rotation flows out from the rotating cylinder 12 into the space between the rotating cylinder 12 and the dewatering tank 4, and flows out from the drain valve 19. In order to separate water and sludge, several identical leakage holes 16 are provided on the outer surface of the rotating cylinder 12, and the size of the leakage holes 16 can be designed according to the size of the sludge particles to be separated.

[0026] In order to facilitate the collection of separated sewage and sludge, four support rods 3 are fixedly connected to the bottom surface of the support plate 1, and a fixing ring 5 is fixedly connected to the outer surface of the dewatering tank 4. The fixing ring 5 is fixedly connected to the bottom of the support plate 1. The position of the dewatering tank 4 can be fixed by the fixing ring 5 and the fixing rods 18 to prevent it from shaking violently during use.

[0027] To prevent the pressure plate 8 from shifting and colliding with the rotating cylinder 12 when the hydraulic telescopic rod 6 moves downward, a reinforcing plate 9 is fixedly connected to the output end of the hydraulic telescopic rod 6. The bottom surface of the reinforcing plate 9 is fixedly connected to the top surface of the pressure plate 8. The size of the pressure plate 8 is the same as the inner diameter of the rotating cylinder 12. The reinforcing plate 9 can reinforce the hydraulic telescopic rod 6 and the pressure plate 8, enhancing the stability of the device. The hydraulic telescopic rod 6 is configured to apply a pressure of 5-10 MPa to the pressure plate 8, which can squeeze out the remaining sludge and clean the inner wall of the rotating cylinder 12 without damaging the inside of the rotating cylinder 12. Furthermore, the pressure plate 8 will not be squeezed against the bottom wall of the rotating cylinder 12 when the hydraulic telescopic rod 6 is in its longest state.

[0028] In order to reduce the friction generated during the meshing and rotation of the gear ring, a second bearing 17 is fixedly connected to the support plate 1, and a first bearing 15 is fixedly connected to the inner wall of the upper end of the dewatering tank 4. The inner ring of the first bearing 15 is fixedly connected to the rotating cylinder 12, and the inner ring of the second bearing 17 is fixedly connected to the other end of the gear column 14. The drive motor 13 is configured to drive the rotating cylinder 12 to rotate at a speed of 1000-2000 rpm so that the sewage can be completely separated under the action of centrifugal force.

[0029] In order to control the outflow of water after separation, a slide gate valve 18 is fixedly connected to the discharge pipe 20. During the separation stage, the slide gate valve 18 is closed so that all the water in the rotating drum 12 enters the dewatering tank 4 and is discharged. After the water separation is completed, the slide gate valve 18 is opened and the hydraulic telescopic rod 6 is activated to squeeze the remaining sludge out of the discharge pipe 20.

[0030] In order to prevent sludge from flowing away with the water during sewage separation, the orifice 16 is provided with a diameter of 0.1-0.5mm and is evenly distributed on the side wall of the rotating cylinder 12.

[0031] The specific working process of this utility model is as follows:

[0032] In use, first connect the power supply to the drive motor 13. The output end of the drive motor 13 drives the gear column 14, which is fixedly connected to it, to rotate. The lower end of the gear column 14 is fixed to the second bearing 17 on the inner wall of the support plate 1. The second bearing 17 can reduce the frictional resistance when the gear column 14 rotates. Since the outer surface of the gear column 14 meshes with the gear ring 7 on the rotating cylinder 12, the rotation of the gear column 14 will synchronously drive the rotating cylinder 12 to rotate. The inner ring of the rotating cylinder 12 is fixed to the first bearing 15 on the inner wall of the support plate 1. The first bearing 15 ensures that the rotating cylinder 12 is stable and without deviation when rotating at high speed. The rotating drum 12 rotates at high speed, generating centrifugal force. The free water in the sludge is thrown out under centrifugal force and seeps into the dewatering tank 4 through several holes 16 on the outer surface of the rotating drum 12. The drain valve 19 at the bottom of the dewatering tank 4 is opened. The rotating drum 12 continues to rotate, and the separated wastewater is discharged into a preset wastewater collection pipe or secondary treatment equipment. After the wastewater is basically discharged, the drain valve 19 is closed. In actual use, the hole diameter of the holes 16 is precisely designed to allow water to pass through while trapping sludge particles to prevent sludge from being lost with the water.

[0033] After the water has drained, stop the drive motor 13 to bring the rotating drum 12 to a stop. Then, start the oil supply system of the hydraulic telescopic rod 6. The hydraulic telescopic rod 6 extends downward from the bottom of the fixed frame 2. The bottom end of the hydraulic telescopic rod 6 is connected to the pressure plate 8 through the reinforcing plate 9 to prevent the pressure plate 8 from tilting during compression. As the hydraulic telescopic rod 6 extends, the pressure plate 8 slowly extends into the interior of the rotating drum 12. The side wall of the pressure plate 8 can move downward along the inner side wall of the rotating drum 12, cleaning the sludge on the inner wall of the rotating drum 12. When it extends downward to a certain extent, it encounters a large amount of remaining sludge. At this point, the cylinder... A stable pressure is applied to the sludge inside. During this process, the slide valve 18 is opened, and the remaining sludge inside the rotating drum 12 flows out along the discharge pipe 20 under the pressure of the pressure plate 8 through the continuous downward movement of the pressure plate 8. After the sludge flows out, the hydraulic telescopic rod 6 is lifted and the inside of the rotating drum 12 is manually flushed with water for secondary cleaning. This ensures that the inside of the rotating drum 12 is clean and tidy, avoiding the need for personnel to enter the inside to scrape the walls. It also avoids the problem of mud adhering to the agitator and other dead corners due to the use of the agitator, which is difficult to clean and affects the efficiency of subsequent work.

Claims

1. A sludge dewatering device for sewage treatment, comprising a support plate (1), characterized in that: A fixed frame (2) is fixedly connected to the upper surface of the support plate (1). A hydraulic telescopic rod (6) and a drive motor (13) are fixedly connected to the bottom surface of the fixed frame (2). A pressure plate (8) is fixedly connected to the output end of the hydraulic telescopic rod (6). A dehydration tank (4) is fixedly connected to the inner wall of the middle part of the support plate (1). A gear column (14) is fixedly connected to the output end of the drive motor (13). A rotating cylinder (12) is rotatably connected inside the dehydration tank (4). A gear ring is fixedly connected to the upper end of the rotating cylinder (12). 7), the gear column (14) meshes with the gear ring (7) for transmission, the bottom of the rotating cylinder (12) is provided with a discharge port (10), the bottom of the discharge port (10) is fixedly connected with a rotary joint (11), the other end of the rotary joint (11) is fixedly connected with a discharge pipe (20), the discharge pipe (20) extends outward through the bottom of the dehydration tank (4), the bottom end of the dehydration tank (4) is fixedly connected with a drain valve (19), and the outer surface of the rotating cylinder (12) is provided with several identical leakage holes (16).

2. The sludge dewatering device for sewage treatment according to claim 1, characterized in that: Four support rods (3) are fixedly connected to the bottom surface of the support plate (1), and a fixing ring (5) is fixedly connected to the outer surface of the dehydration tank (4). The fixing ring (5) is fixedly connected to the bottom of the support plate (1).

3. The sludge dewatering device for sewage treatment according to claim 1, characterized in that: The output end of the hydraulic telescopic rod (6) is fixedly connected to a reinforcing plate (9), the bottom surface of the reinforcing plate (9) is fixedly connected to the top end of the pressure plate (8), and the size of the pressure plate (8) is the same as the inner diameter of the rotating cylinder (12).

4. The sludge dewatering device for sewage treatment according to claim 1, characterized in that: A second bearing (17) is fixedly connected to the support plate (1), and a first bearing (15) is fixedly connected to the inner wall of the upper end of the dehydration tank (4). The inner ring of the first bearing (15) is fixedly connected to the rotating cylinder (12), and the inner ring of the second bearing (17) is fixedly connected to the other end of the gear column (14).

5. A sludge dewatering device for wastewater treatment according to claim 4, characterized in that: A slide valve (18) is fixedly connected to the discharge pipe (20).

6. A sludge dewatering device for wastewater treatment according to claim 1, characterized in that: The diameter of the leakage hole (16) is 0.1-0.5 mm, and it is evenly distributed on the side wall of the rotating cylinder (12).

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