Sludge dewatering device and method for sludge treatment

Abstract

The present application provides a kind of sludge dewatering device and method for sludge treatment, it is related to sludge dewatering technical field, including processing box, dehydration cylinder, rotating drive component and lifting disc assembly;The present application, by designing the dehydration cylinder of upper hard section, lower flexible section, and setting lifting disc assembly at the top end of dehydration cylinder, rotating drive component is set at the bottom end of dehydration cylinder, it is simple in structure, integrated in processing box can realize to sludge and carry out dewatering treatment, and rely on rotating drive component and drive the rotation of flexible section on the rotating joint and go up, it is a labor-saving structure, can use small power motor to complete the above drive;And dehydration cylinder is used as core component, the flexible section of dehydration cylinder can use porous cloth material, its manufacturing cost is lower, can be replaced after use breakage.

Description

Technical Field

[0001] This invention relates to the field of sludge dewatering technology, specifically to a sludge dewatering device and method for sludge treatment. Background Technology

[0002] Sludge is a solid-liquid mixture with extremely high water content, consisting of an extremely complex heterogeneous body composed of organic fragments, bacterial cells, inorganic particles, colloids, etc. A certain amount of sludge is generated in the wastewater treatment systems of factories and mines. Since the amount of sludge is not large, only a few tons or a dozen tons per month, the cost of investing in large-scale sludge treatment equipment is high. Moreover, the equipment is frequently shut down, resulting in high wear and tear (corrosion of key parts).

[0003] Currently, most sludge treatment equipment designed and developed is used in large-scale sludge treatment processes. Its overall cost and operation and maintenance costs are relatively high, and small and medium-sized enterprises cannot afford the cost of these sludge treatment equipment. Sludge generated from sewage treatment can only be centrally treated by transportation. Sludge with high water content is often accompanied by some foul odors, and it will also cause air pollution along the way during transportation. Therefore, this invention provides a sludge dewatering device and method for sludge treatment to meet market demand. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sludge dewatering device and method for sludge treatment, which solves the problems of high costs associated with the design, development, use, and maintenance of current sludge treatment equipment, as well as high wear and tear costs (corrosion of critical parts).

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sludge dewatering device for sludge treatment, comprising:

[0007] Processing box;

[0008] A dewatering cylinder, comprising a rigid section at the top and a flexible section at the bottom, wherein overflow holes are provided on the sides of the flexible section and / or the rigid section of the dewatering cylinder.

[0009] A rotary drive assembly is installed at the bottom of the processing chamber and is used to rotate the bottom end of the dewatering cylinder.

[0010] A lifting plate assembly is installed on the top of the processing box, and the plate of the lifting plate assembly corresponds to the hard section of the dewatering cylinder.

[0011] Preferably, the dehydration cylinder comprises:

[0012] The upper cylinder is fixedly installed at its top end to the top plate of the processing box, and the top plate of the processing box is provided with a first circular hole corresponding to the top end of the upper cylinder.

[0013] The filter bag has its top end fixedly connected to the bottom of the upper cylinder via a first hoop, and the filter bag is made of porous fabric.

[0014] The lower cylinder is fixedly connected to the bottom end of the filter bag by a second hoop.

[0015] The upper cylinder is a rigid section, while the filter bag is a flexible section.

[0016] Preferably, the upper cylindrical component includes: a cylindrical body, a first flange portion fixedly connected to the top end of the cylindrical body, a plurality of second threaded columns arranged in an annular array fixedly connected to the bottom end of the first flange portion and located on the outside of the cylindrical body, an anti-slip body fixedly connected to the outside of the cylindrical body and near the bottom end, and a plurality of guide ports arranged in an annular array opened on the outside of the anti-slip body;

[0017] The filter bag comprises, from top to bottom, an upper connecting part, a permeable section, and a lower connecting part. Several strip-shaped restrictors arranged in a ring array are fixedly connected to the outer side of the upper connecting part, and the bottom end of the strip-shaped restrictors extends to the outer side of the permeable section.

[0018] Preferably, a second flange is fixedly provided at the bottom end of the lower cylinder, and a guide hole is provided at the end of the second flange;

[0019] The rotation drive assembly includes:

[0020] The rotating body has a second circular hole on the bottom plate of the processing box. The rotating body is rotatably installed inside the second circular hole. The top of the rotating body is fixedly connected to a number of first threaded columns arranged in a ring array. The first threaded columns correspond to the guide holes. A spring is sleeved on the first threaded column and above the second flange. A clamping nut is threadedly connected on the first threaded column and above the spring.

[0021] The second motor has a first gear fixedly connected to its top output end, and a transmission gear ring is fixedly installed on the outer side of the rotating body. The first gear meshes with the transmission gear ring for transmission.

[0022] The housing component is fixedly connected to the bottom plate of the processing box, and the first gear and the transmission gear ring are both located on the inner side of the housing component.

[0023] Preferably, the lifting plate assembly includes:

[0024] The frame is fixedly installed on the top plate of the processing box, and the horizontal part of the frame is located directly above the dewatering cylinder.

[0025] The first motor is fixedly installed on the top of the frame, and a threaded shaft is fixedly installed at the bottom output end of the first motor through a coupling. The bottom end of the threaded shaft extends to the inner side of the flexible section, and a compaction head is fixedly installed at the bottom end of the threaded shaft. Side branches are fixedly provided on the side of the compaction head.

[0026] The disc body is threadedly fitted to the threaded shaft.

[0027] A telescopic component is fixedly connected to the frame, and the bottom end of the telescopic component is fixedly connected to the top end of the plate.

[0028] Preferably, a storage pool is provided at the top of the processing box, and the top port of the dehydration cylinder is connected to the storage pool.

[0029] Another object of the present invention is to provide a sludge dewatering method for sludge treatment, using the above-described sludge dewatering device for sludge treatment, comprising the following steps:

[0030] S1. Keep the top of the dewatering cylinder in the open position, and drive the bottom of the dewatering cylinder to rotate at least 360° through the rotation drive assembly, so that the flexible section forms a rotating joint;

[0031] S2. Sludge is fed into the dewatering cylinder from the top port.

[0032] S3. Start the lifting disc assembly. The lifting disc assembly controls the disc to enter the hard section of the dewatering cylinder and uses the disc to pre-compact the sludge.

[0033] S4. The bottom end of the dewatering cylinder is driven to continue rotating by the rotary drive component, causing the rotating section on the flexible section to move upward. The dewatering cylinder squeezes the sludge, thereby achieving dewatering of the sludge.

[0034] This invention provides a sludge dewatering device and method for sludge treatment. It has the following beneficial effects:

[0035] 1. This invention features a dewatering cylinder with a rigid upper section and a flexible lower section. A lifting plate assembly is installed at the top of the cylinder, and a rotary drive assembly is installed at the bottom. This simple structure, integrated within a processing box, enables sludge dewatering. The rotary drive assembly moves the rotating section on the flexible section upwards, resulting in a labor-saving design that can utilize a low-power motor. Furthermore, the flexible section of the dewatering cylinder, with the dewatering cylinder as the core component, can be made of porous fabric, resulting in low manufacturing costs and easy replacement after damage. Using this sludge dewatering device, sludge dewatering equipment can dewater sludge generated within enterprises, reducing its water content and resulting in a blocky shape, facilitating transportation by flatbed truck.

[0036] 2. This invention, through a specific design of the dewatering cylinder structure, includes a lower cylinder component at the bottom end of the dewatering cylinder, with a second flange fixedly installed at the bottom end of the lower cylinder component. The end of the second flange has a guide hole. The rotation drive assembly drives the lower cylinder component to rotate by a first threaded column. During this process, the bottom end of the dewatering cylinder can move up and down, and springs and clamping nuts are designed to limit the movement. The ability of the bottom end of the dewatering cylinder to move up and down can compensate for the axial shortening during the rotation of the filter bag, ensuring the stability of the dewatering cylinder structure. Attached Figure Description

[0037] Figure 1 This is a first-view perspective perspective view of a sludge dewatering device for sludge treatment proposed in this invention.

[0038] Figure 2 This is a second-view elevation view of a sludge dewatering device for sludge treatment proposed in this invention;

[0039] Figure 3 This is a front view of a sludge dewatering device for sludge treatment proposed in this invention;

[0040] Figure 4 This is a side view of a sludge dewatering device for sludge treatment proposed in this invention;

[0041] Figure 5 This is a top view of a sludge dewatering device for sludge treatment proposed in this invention;

[0042] Figure 6 for Figure 5 Cross-sectional view of section line AA in the middle;

[0043] Figure 7 This is a schematic diagram of the internal structure of a sludge dewatering device for sludge treatment proposed in this invention;

[0044] Figure 8 This is a schematic diagram of the internal structure of a sludge dewatering device for sludge treatment proposed in this invention;

[0045] Figure 9 This is a perspective view of a lifting plate assembly of a sludge dewatering device for sludge treatment proposed in this invention.

[0046] Figure 10 This is a perspective view of a sludge treatment component of a sludge dewatering device for sludge treatment proposed in this invention.

[0047] Figure 11 This is a perspective view of a sludge treatment component of a sludge dewatering device for sludge treatment proposed in this invention.

[0048] Figure 12 This is a three-dimensional schematic diagram of the rotary drive assembly of a sludge dewatering device for sludge treatment proposed in this invention.

[0049] The components include: 1. Outlet box; 1a. Guide inclined frame; 2. Processing box; 3. Storage pool; 3a. L-shaped baffle; 4. Water collection shell; 4a. First water pipe; 5. Sludge conveying assembly; 501. Pump box; 502. Pipe storage rack; 502a. Crossbar; 502b. Base frame; 503. Discharge pipe; 6. Lifting plate assembly; 601. Frame body; 602. First motor; 603. Coupling; 604. Threaded shaft; 605. Plate body; 606. Mixing head; 606a. Side branch; 607. Telescopic component; 7. Rotary drive assembly; 701. Second motor; 702. First gear; 703. Rotating body; 704, transmission gear ring; 705, first threaded post; 706, spring; 707, clamping nut; 8, dewatering cylinder; 801, upper cylinder; 801a, first flange; 801b, second threaded post; 801c, anti-slip body; 801d, guide port; 801e, cylindrical body; 802, filter bag; 802a, upper connecting part; 802b, strip-shaped limiting part; 802c, permeable section; 802d, lower connecting part; 803, lower cylinder; 803a, second flange; 803b, guide hole; 9, water collection tank; 9a, second water pipe; a, rigid section; b, flexible section. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1:

[0052] like Figures 1-12As shown, this embodiment of the invention provides a sludge dewatering device for sludge treatment, comprising: a treatment box 2, a dewatering cylinder 8, a rotary drive assembly 7, and a lifting plate assembly 6. The treatment box 2 is a cubic frame structure, with bearing / support plates at the top and bottom, and protective side plates arranged on the four sides. The dewatering cylinder 8 is disposed inside the treatment box 2, and includes a rigid section a at the top and a flexible section b at the bottom. Overflow holes are provided on the sides of the flexible section b and / or the rigid section a. When the sludge is compressed inside the dewatering cylinder 8, the water in the cylinder is squeezed outwards through the overflow holes, thereby achieving sludge dewatering. The rotary drive assembly 7 is installed at the bottom of the treatment box 2. The bottom end of the dewatering cylinder 8 is used for rotation. When the rotation drive assembly 7 drives the bottom end of the dewatering cylinder 8 to rotate 360°, a rotating joint is formed at the flexible section b of the dewatering cylinder 8. This rotating joint can block the sludge from falling downwards out of the dewatering cylinder 8. The lifting plate assembly 6 is installed on the top of the processing box 2, and the plate 605 of the lifting plate assembly 6 corresponds to the hard section a of the dewatering cylinder 8. The lifting plate assembly 6 drives the plate 605 to move up and down, so that the plate 605 can block the top of the dewatering cylinder 8 or keep the top of the dewatering cylinder 8 in an open state. When sludge is fed in, the top of the dewatering cylinder 8 is opened. After the sludge is injected into the dewatering cylinder 8, the plate 605 blocks the top of the dewatering cylinder 8, and the lifting plate assembly 6 drives the plate 605 to move down, so that the plate 605 of the lifting plate assembly 6 pre-presses the sludge.

[0053] When using this device, first keep the top of the dewatering cylinder 8 in the open position. Drive the bottom of the dewatering cylinder 8 at least 360° using the rotation drive assembly 7, causing the flexible section b to form a rotating joint. Then, sludge is fed into the dewatering cylinder 8 from the top port. The weight of the sludge causes the rotating joint of the flexible section b to move to its lowest position. Once the dewatering cylinder 8 is full of sludge, activate the lifting disc assembly 6. The lifting disc assembly 6 controls the disc 605 to enter the rigid part of the dewatering cylinder 8. In section a, the disc 605 blocks the top port of the dewatering cylinder 8. The disc 605 continues to move downward, pre-compacting the sludge. Finally, the bottom of the dewatering cylinder 8 is driven to continue rotating by the rotary drive assembly 7, causing the rotating joint on the flexible section b to move upward. The dewatering cylinder 8 squeezes the sludge, achieving dewatering. After the sludge dewatering is completed, the rotary drive assembly 7 drives the bottom of the dewatering cylinder 8 to return to its original position, and the sludge falls from the bottom of the dewatering cylinder 8 under its own weight.

[0054] This invention features a dewatering cylinder 8 with a rigid upper section (a) and a flexible lower section (b). A lifting plate assembly is installed at the top of the cylinder 8, and a rotary drive assembly is installed at the bottom. This simple structure, integrated within a processing box, enables sludge dewatering. The rotary drive assembly drives the rotating section on the flexible lower section (b) upwards, resulting in a labor-saving design that can utilize a low-power motor. Furthermore, with the dewatering cylinder 8 as the core component, the flexible section can be made of porous fabric, resulting in low manufacturing costs and easy replacement after damage. Using this sludge dewatering device, sludge dewatering equipment can dewater sludge generated within enterprises. The treated sludge has reduced water content and is now in a blocky form, facilitating transportation by flatbed truck.

[0055] In one embodiment, the dewatering cylinder 8 includes: an upper cylinder 801, a filter bag 802, and a lower cylinder 803. The top end of the upper cylinder 801 is fixedly installed on the top plate of the treatment box 2, and a first circular hole corresponding to the top end of the upper cylinder 801 is provided on the top plate of the treatment box 2. Sludge can be injected into the dewatering cylinder 8 from the top of the treatment box 2 through the first circular hole. The inner wall of the upper cylinder 801 is smooth, and the shape of the disc 605 matches the cross-section of the inner hole of the upper cylinder 801. The disc 605 can seal the upper cylinder 801, and the disc 605 can move down like a piston to squeeze the sludge below the disc 605. The top end of the filter bag 802 is fixedly connected to the bottom of the upper cylinder 801 through a first clamp. The filter bag 802 is made of porous fabric. A multi-layered, high-strength fabric should be selected for the filter bag 802 to prevent damage when squeezing sludge. The top of the lower cylinder 803 is fixedly connected to the bottom of the filter bag 802 via a second clamp. In the above structure, both ends of the filter bag 802 are fixed with clamps, making it very easy to replace. When using the device, replace it with a new filter bag 802. If the device is not in use for an extended period, the filter bag 802 can be disassembled. Due to its simple structure, after disassembling the filter bag 802, the remaining parts can be simply rinsed. In the above description, the upper cylinder 801 is the rigid section a, and the filter bag 802 is the flexible section b.

[0056] In one embodiment, the upper cylindrical member 801 includes: a cylindrical body 801e, a first flange portion 801a fixedly connected to the top end of the cylindrical body 801e, and a plurality of second threaded posts 801b arranged in a ring array fixedly connected to the bottom end of the first flange portion 801a and located outside the cylindrical body 801e. When installing the upper cylindrical member 801, the cylindrical body 801 is installed downward from the top plate of the processing box 2. A large circular hole is provided on the top plate of the processing box 2, and a second threaded post 801b is provided on the outer periphery of the large circular hole. The cylindrical body 801 is inserted into the large round hole corresponding to the threaded post 801b. The second threaded post 801b is inserted into the small round hole, and the upper cylindrical body 801 is fixed by installing a nut on the second threaded post 801b. An anti-slip body 801c is fixedly connected to the outside of the cylindrical body 801e and near the bottom. The anti-slip body 801c, together with the first hoop, can ensure the stable connection of the filter bag 802. Several guide ports 801d distributed in a ring array are opened on the outside of the anti-slip body 801c.

[0057] The filter bag 802 comprises, from top to bottom: an upper connecting part 802a, a permeable section 802c, and a lower connecting part 802d. Several strip-shaped restrictors 802b arranged in a ring array are fixedly connected to the outer side of the upper connecting part 802a. The bottom end of the strip-shaped restrictor 802b extends to the outer side of the permeable section 802c. The strip-shaped restrictor 802b corresponds to the guide port 801d and can restrict the top of the filter bag 802 from rotating relative to the upper cylinder 801. The strip-shaped restrictor 802b is generally made of rubber sheet with steel wire inside, which can deform in the length direction. When the bottom end of the filter bag 802 rotates, the bottom of the strip-shaped restrictor 802b also deforms to a certain extent. In addition, the strip-shaped restrictor 802b avoids a large dead angle area (triangular area) at the connection between the filter bag 802 and the upper cylinder 801.

[0058] In one embodiment, a second flange 803a is fixedly provided at the bottom end of the lower cylinder 803, and a guide hole 803b is provided at the end of the second flange 803a; the rotary drive assembly 7 includes: a rotating body 703, a second motor 701, a first gear 702, a transmission gear ring 704, and a housing.

[0059] A second circular hole is provided on the bottom plate of the processing box 2. The rotating body 703 is rotatably mounted inside the second circular hole. The rotating body 703 can be mounted using bearings. Several first threaded posts 705 arranged in a ring array are fixedly connected to the top of the rotating body 703. The first threaded posts 705 correspond to the guide holes 803b. A spring 706 is sleeved on the first threaded posts 705 and above the second flange 803a. A clamping nut 707 is threadedly connected to the first threaded posts 705 and above the spring 706. The second flange 803a can move up and down relative to the rotating body 703. However, due to the restriction of spring 706 and clamping nut 707, the second flange 803a can only move up and down first. It is used to compensate for the axial shortening during the rotation of the filter bag 802. The top output end of the second motor 701 is fixedly connected to the first gear 702. The outer side of the rotating body 703 is fixedly installed with the transmission gear ring 704. The first gear 702 and the transmission gear ring 704 mesh and drive each other. The housing is fixedly connected to the bottom plate of the treatment box 2. The first gear 702 and the transmission gear ring 704 are both located inside the housing. The housing is used to protect the first gear 702 and the transmission gear ring 704.

[0060] In this scheme, the torque of the second motor 701 drives the rotating body 703 to rotate through the transmission action of the first gear 702 and the transmission gear ring 704 to reduce torque. The rotating body 703 can provide a large rotational force. The rotating body 703 drives the lower cylinder 803 to rotate by the first threaded column 705, that is, drives the bottom of the dewatering cylinder 8 to rotate.

[0061] In one embodiment, the lifting plate assembly 6 includes: a frame 601, a first motor 602, a threaded shaft 604, a plate 605, and a telescopic member 607.

[0062] The frame 601 is fixedly installed on the top plate of the treatment box 2. The frame 601 is L-shaped, and the horizontal part of the frame 601 is located directly above the dewatering cylinder 8. The first motor 602 is fixedly installed on the top of the frame 601, and the bottom output end of the first motor 602 is fixedly installed with a threaded shaft 604 through a coupling 603. The bottom end of the threaded shaft 604 extends to the inner side of the flexible section b, and a compaction head 606 is fixedly installed at the bottom end of the threaded shaft 604. A side branch 606a is fixedly provided on the side of the compaction head 606. When the compaction head 606 rotates, the side branch 606a can push the sludge to rotate. The disc 605 is threadedly engaged with the threaded shaft 604. A telescopic member 607 is fixedly connected to the frame 601, and the bottom end of the telescopic member 607 is fixedly connected to the top end of the disc 605.

[0063] In this scheme, the first motor 602 drives the threaded shaft 604 and the mixing head 606 to rotate, and the telescopic member 607 is used to restrict the rotation of the disc 605. The disc 605 and the threaded shaft 604 are threadedly engaged, that is, when relative rotation occurs between them, the disc 605 can be driven to move up and down.

[0064] In some cases, the dewatered sludge clumps may be tightly stuck to the inside of the flexible section b. When the mixing head 606 rotates, it can break up these clumps of sludge.

[0065] In one embodiment, a storage tank 3 is provided at the top of the processing box 2, and the top port of the dewatering cylinder 8 is connected to the storage tank 3. The user can pump fluid sludge into the storage tank 3. When the disc 605 moves upward and opens the top port of the dewatering cylinder 8, the sludge inside the storage tank 3 can flow into the dewatering cylinder 8.

[0066] In one embodiment, it further includes: a sludge conveying assembly 5, which is fixedly installed on the side of the treatment tank 2, and the outlet end of the sludge conveying assembly 5 is fixedly connected to the storage tank 3. The sludge conveying assembly 5 is used to pump sludge into the storage tank 3.

[0067] In one embodiment, the sludge conveying assembly 5 includes: a pump box 501 and a pipe storage rack 502 fixedly installed on the side of the processing tank 2. The pump box 501 is located above the pipe storage rack 502. A crossbar 502a and a base frame 502b are provided inside the pipe storage rack 502. The outlet end of the pump box 501 is connected to a discharge pipe 503. The top end of the discharge pipe 503 is fixedly connected to the bottom of the storage tank 3. An L-shaped baffle 3a is fixedly installed on the side of the storage tank 3 at a position corresponding to the top end of the discharge pipe 503. The top end of the discharge pipe 503 faces upward. The L-shaped baffle 3a is designed to prevent the sludge from spraying upward during pumping and falling into the storage tank 3. The inlet end of the pump box 501 is connected to a rigid pipe. The rigid pipe is in the form of multiple sections. The pipe storage rack 502 is used to store the rigid pipe. When in use, the user connects a pipe of appropriate length according to actual needs. One end of the pipe is inserted into the sludge. The pump box 501 works to pump the sludge into the storage tank 3.

[0068] In one embodiment, an outlet box 1 is fixedly connected to the bottom of the processing box 2. The outlet box 1 has an opening on one side, and a guide frame 1a is fixedly installed on the inner side of the outlet box 1. The guide frame 1a is an inclined plate structure that guides the dewatered sludge falling from the bottom of the dewatering cylinder 8 out of the outlet box 1.

[0069] The system also includes a water collection shell 4 and a water collection tank 9. The water collection shell 4 is located on one side of the opening of the outlet box 1. The top of the water collection shell 4 is provided with a mesh. The side of the water collection shell 4 is connected to a first water pipe 4a. During the sludge dewatering process, some water will overflow from the bottom of the dewatering cylinder 8. This water is collected by the water collection shell 4. The inside of the treatment box 2 is provided with a ring-shaped water collection tank 9. The side of the water collection tank 9 is connected to a second water pipe 9a. One end of the second water pipe 9a is connected to the first water pipe 4a. During the sludge dewatering process, some water is squeezed out from the side of the dewatering cylinder 8. The water collection tank 9 is used to collect this water.

[0070] Example 2:

[0071] A sludge dewatering method for sludge treatment, using the sludge dewatering device for sludge treatment in Example 1, specifically includes the following steps:

[0072] S1. Keep the top of the dewatering cylinder 8 in the open position, and drive the bottom of the dewatering cylinder 8 to rotate at least 360° by the rotation drive assembly 7, so that the flexible section b forms a rotating joint.

[0073] S2. Sludge is fed into the dewatering cylinder 8 from the top port. At this time, the sludge contains a lot of water.

[0074] S3. Start the lifting plate assembly 6. The lifting plate assembly 6 controls the plate body 605 to enter the hard section a of the dewatering cylinder 8 and uses the plate body 605 to pre-compact the sludge. At this time, the bottom end of the dewatering cylinder 8 is blocked by the rotating joint and the top end of the dewatering cylinder 8 is blocked by the plate body 605.

[0075] S4. The bottom end of the dewatering cylinder 8 is driven to continue rotating by the rotary drive assembly 7, causing the rotating joint on the flexible section b to move upward. The dewatering cylinder 8 squeezes the sludge to achieve dewatering.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A sludge dewatering method for sludge treatment, characterized in that, The dewatering method is performed using a sludge dewatering device for sludge treatment. The sludge dewatering device includes a treatment tank and a dewatering cylinder. The dewatering cylinder includes an upper rigid section and a lower flexible section. A rotary drive assembly is installed at the bottom of the treatment tank and is used to rotate the bottom end of the dewatering cylinder. A lifting plate assembly is installed at the top of the treatment tank, and the plate of the lifting plate assembly corresponds to the rigid section of the dewatering cylinder. The dewatering cylinder includes an upper cylinder, a filter bag, and a lower cylinder. The top end of the upper cylinder is fixedly installed to the top plate of the treatment tank, and a first circular hole corresponding to the top end of the upper cylinder is provided on the top plate of the treatment tank. The top of the bag is fixedly connected to the bottom of the upper cylinder via a first clamp, and the filter bag is made of porous fabric. The top of the lower cylinder is fixedly connected to the bottom of the filter bag via a second clamp. The upper cylinder is a rigid section, and the filter bag is a flexible section. Overflow holes are provided on the sides of both the flexible and rigid sections of the dewatering cylinder. The upper cylinder includes a cylindrical body, with a first flange fixedly connected to the top of the cylindrical body. Several second threaded posts arranged in a ring array are fixedly connected to the bottom of the first flange, located on the outside of the cylindrical body. An anti-slip body is fixedly connected to the outside of the cylindrical body, near the bottom. Several ring arrays are provided on the outside of the anti-slip body. The filter bag comprises, from top to bottom: an upper connecting part, a permeable section, and a lower connecting part. Several ring-shaped restrictive members are fixedly connected to the outer side of the upper connecting part, with the bottom ends of the restrictive members extending to the outer side of the permeable section. These restrictive members correspond to the guiding part and prevent the top of the filter bag from rotating relative to the upper cylinder. The restrictive members are made of rubber sheet with internal steel wires, allowing them to deform along their length. When the bottom of the filter bag rotates, the bottom of the restrictive members also deforms to some extent. These restrictive members prevent large dead zones from forming at the connection between the filter bag and the upper cylinder. The lifting plate assembly includes a frame and a first motor. The frame is fixedly installed on the top plate of the processing box, and the horizontal part of the frame is located directly above the dewatering cylinder. The first motor is fixedly installed on the top of the frame. A threaded shaft is fixedly installed at the bottom output end of the first motor through a coupling. The bottom end of the threaded shaft extends to the inside of the flexible section. A compaction head is fixedly installed at the bottom end of the threaded shaft. Side branches are fixedly provided on the side of the compaction head. The plate body and the threaded shaft are threadedly engaged. A telescopic component is fixedly connected to the frame body. The bottom end of the telescopic component is fixedly connected to the top end of the plate body. When the compaction head rotates, the side branches can push the sludge to rotate and disperse the lumpy sludge. The sludge dewatering method includes the following steps: S1. Keep the top of the dewatering cylinder in the open position, and drive the bottom of the dewatering cylinder to rotate at least 360° through the rotation drive assembly, so that the flexible section forms a rotating joint; S2. Sludge is fed into the dewatering cylinder from the top port. S3. Start the lifting disc assembly. The lifting disc assembly controls the disc to enter the hard section of the dewatering cylinder and uses the disc to pre-compact the sludge. S4. The bottom end of the dewatering cylinder is driven to continue rotating by the rotary drive component, causing the rotating section on the flexible section to move upward. The dewatering cylinder squeezes the sludge, thereby achieving dewatering of the sludge.

2. The sludge dewatering method according to claim 1, characterized in that: A second flange is fixedly provided at the bottom end of the lower cylinder, and a guide hole is provided at the end of the second flange.

3. The sludge dewatering method according to claim 1, characterized in that: The rotary drive assembly includes a rotating body. A second circular hole is provided on the bottom plate of the processing box. The rotating body is rotatably mounted inside the second circular hole. Several first threaded posts arranged in a ring array are fixedly connected to the top of the rotating body. The first threaded posts correspond to the guide holes. A spring is sleeved on the first threaded post and above the second flange. A clamping nut is threadedly connected on the first threaded post and above the spring.

4. The sludge dewatering method according to claim 1, characterized in that: The first gear is fixedly connected to the top output end of the second motor, and a transmission gear ring is fixedly installed on the outer side of the rotating body. The first gear meshes with the transmission gear ring for transmission. The housing is fixedly connected to the bottom plate of the processing box, and the first gear and the transmission gear ring are both located on the inner side of the housing.

5. The sludge dewatering method according to claim 1, characterized in that: The top of the processing tank is equipped with a storage pool, and the top port of the dehydration cylinder is connected to the storage pool.

Images