A sludge dewatering equipment

Abstract

The present invention relates to a sludge dewatering device, comprising a frame; a sludge conveying device mounted on the frame and used to convey sludge to the next execution station; a sludge shaping device mounted on the frame and used to shape the sludge on the sludge conveying device into a set shape; a sludge fixing device, located within the frame and used to receive and fix the sludge conveyed by the sludge conveying device; and a sludge squeezing device mounted on the frame and used to squeeze and dewater the sludge in the sludge fixing device. The present invention not only produces sludge with a low moisture content after dewatering, enabling continuous operation, but also requires minimal equipment investment and low operating costs.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge dewatering in the environmental protection industry, in particular to sludge dewatering equipment. Background Art

[0002] Sludge dewatering equipment is a continuously running sludge treatment equipment, which is mainly divided into plate and frame filter press, belt filter press, centrifugal dewatering machine and screw dewatering machine.

[0003] The plate and frame filter press relies on pressing the plates and frames to filter and squeeze out water. The entire process of pressing and feeding the plates and frames, unloading the frames, and washing the filter cloth is automatically operated. The moisture content of the mud is low, and the moisture content can be below 60%. However, the equipment investment is large, the floor space is large, the supporting equipment is numerous and complex, and it cannot operate continuously. The belt filter press is a comprehensive dehydration machine that uses gravity dehydration and extrusion shear dehydration. It consists of a transmission device, an oil pressure device, a filter cloth tensioning device, a filter cloth offset monitoring and adjustment device, a filter cloth washing device, a high-pressure belt, a filter cloth, and an emergency stop limit switch. Its main feature is a large equipment processing capacity, but during operation, there are disadvantages such as easy clogging of the filter cloth, difficulty in backwashing, high water consumption, and easy deviation of the filter cloth. The mud has a high moisture content, and the moisture content can be about 80%.

[0004] A centrifugal dewatering machine uses centrifugal force generated by high-speed rotation to separate water from solids in sludge. It primarily consists of a drum, a screw conveyor, and a hollow shaft. Its key features include compactness, ease of operation, and minimal environmental pollution. However, these include high investment, energy consumption, noise, and maintenance costs. The resulting sludge has a high moisture content, reaching approximately 80%. The main body of the screw dewatering machine consists of stacked fixed and movable rings, with a spiral shaft running through them, forming a filtration mechanism. Fine movable slits are formed between the fixed and movable rings to filter the filtrate. The inner cavity formed by the spiral shaft and rings is filled with flocculent particles, which are then transported and squeezed toward the end plate during rotation to form a filter cake. The dewatering machine offers low operating speeds, low energy consumption, low noise, low investment, and simplified operation and maintenance. However, these advantages include a relatively low processing capacity and a high sludge moisture content, reaching approximately 80%.

[0005] Therefore, those skilled in the art are committed to developing a sludge dewatering equipment, which not only has a low moisture content of the sludge after dewatering and realizes continuous operation, but also has low equipment investment and low operating cost. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a sludge dewatering device, which not only has low moisture content of the sludge after dewatering and realizes continuous operation, but also has low equipment investment and low operating cost.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: A sludge dewatering device includes a frame;

[0008] A sludge conveying device, which is installed on the frame and is used to convey the sludge to the next execution station;

[0009] a sludge shaping device, the sludge shaping device being arranged on the frame and being used for shaping the sludge on the sludge conveying device into a set shape;

[0010] a sludge fixing device, the sludge fixing device being used to receive and fix the sludge conveyed by the sludge conveying device, the sludge fixing device being located inside the frame;

[0011] A sludge squeezing device is installed on the frame and is used to squeeze and dehydrate the sludge in the sludge fixing device.

[0012] The present invention has the following beneficial effects: sludge is conveyed to the sludge shaping device by the conveying action of the sludge pump. After the sludge is preformed into a predetermined shape by the sludge shaping device, the sludge conveying device conveys the shaped sludge to the sludge fixing device. After the sludge fixing device fixes and seals the sludge, the sludge squeezing device squeezes the sludge to squeeze out water from the sludge. The sludge after squeezing is then conveyed out by the sludge conveying device. This allows for continuous sludge dehydration. After being squeezed by the squeezing device, the water content in the sludge is low, resulting in low equipment investment, small occupied area, and low operating costs.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, the sludge conveying device includes a second roller and a first roller, both ends of the second roller and the first roller are mounted on the frame through bearings and bearing seats, and a lower filter cloth conveyor belt is installed outside the second roller and the first roller;

[0015] A first gear is also installed on the rotating shaft of the second drum, a first power device is installed on the frame, a second gear is installed on the output end of the first power device, the first gear and the second gear are powered by a chain, and the rotation of the first power device drives the sludge on the lower filter cloth conveyor belt to move.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that the first power device drives the first roller and the second roller to rotate, thereby driving the lower filter cloth conveyor belt to move, so that the sludge on the lower filter cloth conveyor belt can be automatically moved to the designated position, which is beneficial to subsequent operations such as dehydration of the sludge. The operation efficiency is high, the equipment structure is simple, and the labor intensity of the operator is low.

[0017] Furthermore, the sludge shaping device includes a support member mounted on the frame, a second power device is mounted on the support member, and a blade is mounted on the output end of the second power device;

[0018] A shaping piece is provided on the periphery of the blade, and the shaping piece is connected to the frame. The rotation of the second power device drives the blade to rotate and cooperates with the shaping piece to flatten the sludge on the sludge conveying device into a set shape.

[0019] The beneficial effect of adopting the above further scheme is that the sludge is pumped into the forming part through the sludge pump, and the rotation of the second power device drives the blade to rotate, flattening the sludge on the lower filter cloth conveyor belt to the same height and forming a set shape, which is convenient for the next process operation, has high work efficiency, and is easy to operate.

[0020] Furthermore, the sludge fixing device includes at least one auxiliary oil cylinder, the output end of the auxiliary oil cylinder is connected to the outer side wall of the fixed outer mold, a fixed upper mold is provided in the inner gap of the fixed outer mold, and a first filter plate is installed at the bottom of the fixed upper mold;

[0021] The auxiliary oil cylinder drives the fixed outer mold to move downward to cover the sludge on the sludge conveying device in the fixed outer mold.

[0022] The beneficial effect of adopting the above-mentioned further scheme is that after the sludge transmission device transports the sludge to the set position, the auxiliary oil cylinder lowers the fixed outer mold to wrap the sludge in the fixed outer mold. The diameter of the fixed outer mold is larger than the diameter of the forming part, so that the fixed outer mold can completely wrap the sludge; after the sludge is wrapped, there will be no leakage from the side when the sludge is squeezed, and the squeezed water is guided to the water tank through the first filter plate and the screen and centrally processed. The operation is simple, fast and efficient, and the efficiency of sludge dewatering is improved.

[0023] Furthermore, the sludge squeezing device includes at least one main oil cylinder installed on the frame, and the main oil cylinder is located directly above the fixed upper mold. The output end of the main oil cylinder moves downward to drive the fixed upper mold to move downward to squeeze the sludge located in the fixed outer mold.

[0024] The beneficial effect of adopting the above-mentioned further scheme is that the fixed upper mold is pushed downward by the main oil cylinder, so that the sludge is squeezed, thereby leaking out excess water. By controlling the hydraulic oil pressure of the main oil cylinder, the extrusion force acting on the sludge can be controlled, thereby controlling the water content in the squeezed sludge.

[0025] Furthermore, the master cylinder and the slave cylinder are both connected to a hydraulic station.

[0026] The beneficial effect of adopting the above further scheme is that both the main cylinder and the auxiliary cylinder are connected to a hydraulic station, which is used to provide power to the main cylinder and the auxiliary cylinder. The centralized control of the hydraulic station facilitates the control of the hydraulic oil inlet pressure, which is beneficial to controlling the extrusion force acting on the sludge.

[0027] Furthermore, a second filter plate is provided on the lower side of the lower filter cloth conveyor belt and directly below the fixed outer mold, and the second filter plate is mounted on the frame.

[0028] The beneficial effect of adopting the above further scheme is that the second filter plate is used to provide a reaction force during the pressure application of the main oil cylinder, preventing the lower filter cloth conveyor belt from being damaged during the downward movement of the main oil cylinder. At the same time, the reaction force provided by the second filter plate makes the sludge squeezed more fully, reducing the water content in the sludge.

[0029] Furthermore, the shaping member is in a circular ring shape, and the side surface of the shaping member is connected to the output end of the pre-compression cylinder. The movement of the pre-compression cylinder drives the shaping member to rotate around the rotation axis.

[0030] The beneficial effect of adopting the above-mentioned further scheme is that the annular shaping piece is conducive to flattening the sludge as a whole to the same height during the rotation of the blade, and presenting a specific shape according to the shaping piece, which is conducive to the next sludge squeezing operation; the pre-compression cylinder is used to rotate the shaping piece's rotating shaft to lift the shaping piece, so as to reduce obstruction when the shaped sludge is transported through the sludge conveying device.

[0031] Furthermore, the side wall of the fixed outer mold is equipped with four evenly arranged auxiliary cylinders, and the frame is equipped with four main cylinders. Distributors are installed on the hydraulic oil inlet pipelines of the auxiliary cylinders and the hydraulic oil inlet pipelines of the main cylinders.

[0032] The beneficial effect of adopting the above-mentioned further scheme is that the four auxiliary cylinders are evenly installed on the outer periphery of the fixed outer mold, so that the lower port of the fixed outer mold is always on the horizontal plane during the rising or falling of the fixed outer mold, which is conducive to wrapping the formed sludge as a whole; multiple main cylinders are used to further increase the pressure acting on the sludge, so that the sludge dehydration is more thorough; the distributor is used to evenly distribute the hydraulic oil to different main cylinders and auxiliary cylinders, so that the extension length of the main cylinder squeezing piston is consistent.

[0033] Furthermore, the first filter plate is provided with a plurality of evenly arranged protrusions.

[0034] The beneficial effect of adopting the above further solution is that channels are formed between the convex parts, which is conducive to guiding the squeezed water along the channels to a designated location for centralized collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of a specific embodiment of the present invention;

[0036] Figure 2 This is a schematic structural diagram of a sludge conveying device, a sludge shaping device, a sludge fixing device, and a sludge squeezing device according to a specific embodiment of the present invention;

[0037] Figure 3This is a schematic diagram of the exploded structure of a fixing device according to a specific embodiment of the present invention;

[0038] Figure 4 This is a structural diagram of the first filter plate in a specific embodiment of the present invention.

[0039] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0040] 100, frame; 200, sludge conveying device; 300, sludge shaping device; 400, sludge fixing device; 500, sludge squeezing device; 600, hydraulic station;

[0041] 201, second roller; 202, bearing; 203, bearing seat; 204, first roller; 205, chain; 206, second gear; 207, first power unit; 208, first gear; 209, lower filter cloth conveyor belt;

[0042] 301, support member; 302, second power device; 303, blade; 304, shaping member;

[0043] 401, auxiliary oil cylinder; 402, fixed outer mold; 403, fixed upper mold; 404, first filter plate; 405, convex part;

[0044] 501, main oil cylinder; second filter plate;

[0045] 601. Distributor. DETAILED DESCRIPTION

[0046] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly defined.

[0049] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, a sludge dewatering equipment is mainly used to dehydrate sludge with a moisture content of 85%-90% to meet the specified requirements. Specifically, it includes a frame 100, which can be welded together using multiple square tubes and mounting steel plates. A sludge conveying device 200 is installed on the frame 100, and the sludge conveying device 200 is used to convey the sludge to the next execution station. In one embodiment, the sludge conveying device 200 includes a second roller 201 and a first roller 204. The second roller 201 and the first roller 204 have the same diameter. The second roller 201 and the first roller 204 are both equipped with a rotating shaft, so that when the rotating shaft rotates, the second roller 201 and the first roller 204 are driven to rotate together. A bearing 202 is installed outside the rotating shaft. Both ends of the second roller 201 and the first roller 204 are installed on the frame 100 through bearings 202 and bearing seats 203. The bearing seats 203 can be fixed bearing seats or vertical bearing seats, which are used to support the second roller 201 and the first roller 204 on the frame 100 and reduce the rotational friction of the second roller 201 and the first roller 204.

[0051] A lower filter cloth conveyor belt 209 is mounted outside the second drum 201 and the first drum 204. In some embodiments, the lower filter cloth conveyor belt 209 has a certain strength for carrying sludge. The lower filter cloth conveyor belt 209 is provided with numerous small holes and channels, which improve water seepage through the lower filter cloth conveyor belt 209. This allows the squeezed water to quickly seep out, improving dehydration efficiency. To further reduce deformation of the lower filter cloth conveyor belt 209 during conveyance, the frame 100 is further provided with multiple support plates, each located below the lower filter cloth conveyor belt 209 to support the lower filter cloth conveyor belt 209. The support plates may be made of nylon to reduce friction and scratches. Compared to conventional belt filter presses, during operation, the lower filter cloth conveyor belt 209 of the present invention operates intermittently and at a gentle speed, preventing the lower filter cloth conveyor belt 209 from deviating or becoming loose.

[0052] A first gear 208 is also mounted on the rotating shaft of the second drum 201. The rotating shaft and first gear 208 are fixedly mounted. A first power unit 207 is mounted on the frame 100. First power unit 207 typically utilizes a low-speed, high-torque motor. A second gear 206 is mounted on the output end of first power unit 207. Power is transmitted between the first and second gears 208 and 206 via a chain 205. The tension of chain 205 can be adjusted by adjusting the position of first power unit 207. The rotation of first power unit 207 drives the second drum 201, thereby moving the sludge on the lower filter cloth conveyor belt 209 toward a desired process location. The rotation timing of first power unit 207 is primarily controlled by a time relay in a controller (not shown).

[0053] See also Figure 1 and Figure 2 The sludge shaping device 300 is mounted on the frame 100 and is used to shape the sludge on the sludge conveying device 200 into a predetermined shape. In this embodiment, the sludge shaping device 300 includes a support member 301 mounted on the frame 100. The support member 301 can be welded to the frame 100 using angle iron. A second power device 302 is mounted on the support member 301. The second power device can be composed of a motor and a reducer. A paddle 303 is mounted on the output end of the second power device 302.

[0054] The second power unit 302 rotates to drive the paddle 303 to rotate, and cooperates with the shaping member 304 to flatten the sludge on the sludge conveying device 200 into a predetermined shape. Specifically, the shaping member 304 is provided on the periphery of the paddle 303 and is connected to the frame 100. The shaping member 304 is mainly used to pre-shape the sludge into a predetermined shape during the rotation and flattening process of the paddle 303. The shape of the sludge is similar to that of the shaping member 304.

[0055] See Figure 1 and Figure 2 , sludge fixing device 400, in one embodiment, the sludge fixing device 400 is used to receive and fix the sludge conveyed by the sludge transmission device 200, and the sludge fixing device 400 is located in the frame 100. When the lower filter cloth conveyor belt 209 in the sludge transmission device 200 conveys the formed sludge to the specified position, the sludge fixing device 400 fixes it and cooperates with the lower filter cloth conveyor belt 209 to form a sealing structure on the bottom and sides, thereby facilitating further processing of the sludge.

[0056] In this embodiment, the sludge holding device 400 includes at least one auxiliary cylinder 401. The output end of the auxiliary cylinder 401 is connected to the outer wall of the fixed outer mold 402. The auxiliary cylinder 401 drives the fixed outer mold 402 downward to enclose the sludge on the sludge transfer device 200 within the fixed outer mold 402. To prevent the fixed outer mold 402 from shaking during its upward and downward movement, a guide device is installed on the outer wall of the fixed outer mold 402, ensuring that the fixed outer mold 402 moves straight up and down.

[0057] The shape of the fixed outer mold 402 is generally similar to that of the shaping piece 304, and the size of the fixed outer mold 402 is slightly larger than that of the shaping piece 304, so that when the fixed outer mold 402 fixes the sludge, the sludge can be completely wrapped in the fixed outer mold 402, which is beneficial to the next water squeezing operation. If the size of the fixed outer mold 402 is the same as or slightly smaller than that of the shaping piece 304, the fixed outer mold 402 cannot completely wrap the formed sludge, and a certain gap will appear between the fixed outer mold 402 and the lower filter cloth conveyor belt 209, resulting in sludge overflowing from the gap during the extrusion process, leakage, spraying, etc., and the sludge cannot be effectively squeezed out.

[0058] See Figure 2 、 Figure 3 and Figure 4 A fixed upper mold 403 is provided in the gap within the fixed outer mold 402. The fixed upper mold 403 is used to evenly distribute the extrusion force of the sludge extrusion device 500, so that the force on the sludge is uniform, which facilitates the extrusion and exudation of moisture in the sludge. A first filter plate 404 is installed at the bottom of the fixed upper mold 403. The fixed upper mold 403 is fixedly connected to the first filter plate 404 by screws. The first filter plate 404 is provided with a plurality of evenly arranged protrusions 405, which are circular or square. The first filter plate 404 can be made of polypropylene. Polypropylene is pressed into a reinforced polypropylene filter plate through advanced manufacturing methods. It has good mechanical properties, stable chemical properties, pressure resistance, heat resistance, corrosion resistance, a smooth surface, good sealing, and is easy to wash.

[0059] Multiple layers of filter cloth can be installed on the first filter plate 404 to improve filtration performance, depending on the actual dehydration conditions. The first filter plate 404 is primarily used to receive the force exerted by the fixed upper mold 403 and transmit it downward. Multiple protrusions 405 are evenly arranged on the first filter plate 404, forming channels between the multiple protrusions 405. This facilitates the flow of water squeezed from the sludge along the channels to a water collection area for centralized collection. To accelerate the flow of squeezed water, a water flow channel can also be provided on the first filter plate 404.

[0060] See Figure 1 、 Figure 2The sludge squeezing device 500 is mounted on the frame 100 and is used to squeeze and dehydrate the sludge in the sludge fixing device 400. In a specific embodiment, the sludge squeezing device 500 includes at least one main oil cylinder 501 mounted on the frame. The main oil cylinder is located directly above the fixed upper mold 403. The output end of the main oil cylinder 501 moves downward, driving the fixed upper mold 403 to move downward to squeeze the sludge in the fixed outer mold 402. The sludge fixed in the fixed outer mold 402 is squeezed to release water from both the upper and lower parts, thereby achieving high dehydration efficiency.

[0061] Example 1

[0062] In the sludge fixing device 400, four evenly arranged auxiliary cylinders 401 are installed on the side wall of the fixed outer mold 402. The four auxiliary cylinders 401 use cylinders of the same type. The use of cylinders of the same type ensures that the lower end of the fixed outer mold 402 is always on the horizontal plane during the rising or falling process of the fixed outer mold 402, thereby facilitating the overall wrapping of the sludge on the lower filter cloth conveyor belt 209.

[0063] Four main oil cylinders 501 are installed on the frame 100. The main oil cylinders 501 also adopt the same type of oil cylinder. The multiple main oil cylinders 501 make the fixed upper mold 403 act with a greater force, thereby making the force for squeezing the sludge greater.

[0064] Both the master cylinder 501 and the slave cylinder 401 are connected to a hydraulic station 600. Distributors 601 are installed on both the slave cylinder 401 and master cylinder 501 hydraulic oil inlet lines. The master cylinder 501 and slave cylinder 401 use separate oil inlet lines. The hydraulic station 600 primarily comprises a hydraulic oil tank, a hydraulic oil pump (mostly an axial piston pump), a power motor, an integrated oil circuit block, a relief valve, and corresponding hydraulic oil lines. During the execution process, the high-pressure hydraulic oil supplied by the hydraulic oil pump enters the first oil circuit after passing through the oil circuit integrated block. The hydraulic oil in the first oil circuit enters different auxiliary oil cylinders 401 after passing through the distributor 601, thereby lifting or lowering the fixed outer mold 402. A first overflow valve is provided in the first oil circuit. The set pressure in the first overflow valve is relatively small to prevent excessive pressure from causing the fixed outer mold 403 to act too strongly on the lower filter cloth conveyor belt 209, causing damage to the lower filter cloth conveyor belt 209 and reducing the service life of the sludge dewatering device.

[0065] The high-pressure hydraulic oil supplied by the hydraulic pump enters the secondary oil circuit after passing through the oil circuit integration block. The hydraulic oil in the second oil circuit then flows through the distributor 601 into the corresponding four main oil cylinders 501, pushing the compression pistons in the main oil cylinders 501 downward to squeeze the sludge. A second relief valve is installed in the second oil circuit, and its opening pressure is set to a higher level. During operation, the hydraulic oil pressure in the main oil cylinders 501 is generally maintained at 18-20 MPa, with a maximum pressure of 23 MPa. During operation, the main oil cylinders 501 typically maintain pressure for at least 10 minutes. The superposition of ultra-high pressure pulses enables faster and more efficient sludge dehydration, reducing the water content in the sludge.

[0066] Example 2

[0067] The fixed outer mold 402 can be made of 304 stainless steel, which not only withstands high operating pressure but also effectively reduces rust on the fixed outer mold 402, extending its service life. The fixed upper mold 403 is positioned within the fixed outer mold 402, and the two are clearance-fitted, allowing the fixed upper mold 403 to slide freely. The fixed upper mold 403 and the fixed outer mold 402 have a clearance fit. To prevent sludge from squeezing out of the narrow gap during extrusion, an O-ring is installed on the outer wall of the fixed outer mold 402 to prevent sludge leakage and improve the seal between the fixed outer mold 402 and the fixed upper mold 403. When the fixed outer mold 402 is lowered to secure the sludge, it stops lowering after reaching the set position. The fixed upper mold 403 moves downward for several seconds after the fixed lower mold 402 stops moving to pre-compress the sludge.

[0068] A second filter plate 502 is installed below the lower filter cloth conveyor belt 209 and directly below the fixed outer mold 402. The second filter plate 502 is mounted on the frame 100. To further enhance filtration, multiple layers of filter cloth can be installed between the second filter plate 502 and the lower filter cloth conveyor belt 209, depending on actual conditions. The second filter plate 502 is equipped with multiple small holes and specially designed drainage grooves, which collect and return the squeezed water to a designated location. A water collection trough can also be installed on the frame 100 near the second filter plate 502 to collect the squeezed water collected by the drainage grooves and discharge it into a collection cabinet. The second filter plate 502 is also used to provide a reaction force during the pressure application of the main oil cylinder 501 to prevent the lower filter cloth conveyor belt 209 from being damaged during the downward movement of the main oil cylinder 501. At the same time, the reaction force provided by the second filter plate 502 makes the sludge more fully squeezed and reduces the water content in the sludge. Experiments have continuously verified that the moisture content of the sludge after dehydration can be stabilized below 60%, which meets the design requirements, and the energy consumption of the equipment is low. The electricity required to dehydrate one ton of sludge with a moisture content of 88% to below 60% is less than ten kilowatts.

[0069] Example 3

[0070] The shaping member 304 is annular and can be made of 304 stainless steel to reduce corrosion. The side of the shaping member 304 is connected to the output end of a preload cylinder 306. The preload cylinder 306 can be a compressed air cylinder or an oil cylinder. In this embodiment, the preload cylinder 306 is an oil cylinder. The movement of the preload cylinder 306 drives the shaping member 304 to rotate about the rotation axis 305. During the specific working process, the rotating shaft 305 is installed on the frame 100, and the rotating shaft 305 is installed opposite to the pre-compression cylinder 306. Under the action of hydraulic oil, the output end of the pre-compression cylinder 306 moves upward, thereby driving the shaping member 304 to rotate around the rotating shaft 305, so that a certain distance appears between the shaping member 306 and the lower filter cloth conveyor belt 209, thereby facilitating the shaping of the sludge to be transported by the sludge transmission device, reducing the obstruction of the shaping member 306 to the formed sludge, so that the formed sludge is transported to the sludge fixing device 300 under the transmission action of the sludge transmission device 200 for the next process operation.

[0071] Example 4

[0072] In this embodiment, the sludge conveying device 200, the sludge shaping device 300, the sludge fixing device 400, the sludge squeezing device 500 and the hydraulic station 600 are all centrally and automatically controlled by a controller to achieve automatic and continuous operation without human monitoring; at the same time, the controller can be directly connected to the central control room to facilitate automatic monitoring and adjustment of the sewage treatment plant, and realize online monitoring and real-time recording; it can also be operated in a diversified manner. The sludge dewatering equipment can be operated by a microcomputer during automatic operation, and parameters can be set and adjusted according to the different characteristics of the sludge. When the filtration effect is not ideal, multi-layer pressing can be adopted to ensure the filtration effect of the sludge.

[0073] The present invention operates as follows: A sludge pump (not shown) pumps sludge into the shaping member 304. During the pumping process, the second power unit 302 rotates the paddles 303, thereby leveling the sludge within the shaping member 304 to a uniform height. The sludge pump stops rotating after a predetermined time. At this time, the preload cylinder 306 moves upward, driving the shaping member 304 to rotate about the rotation axis 305, creating a certain distance between the shaping member 304 and the lower filter cloth conveyor belt 209. Next, the first power unit 207 rotates, driving the second roller 201 to rotate. This rotation of the second roller 201 drives the lower filter cloth conveyor belt 209, which is mounted outside the second roller 201, to move horizontally, thereby moving the sludge on the lower filter cloth conveyor belt 209 to a predetermined position. The rotation timing of the first power unit 207 is controlled by a time relay within the controller (not shown).

[0074] After the sludge reaches the designated position, the output shaft of the auxiliary cylinder 401 moves downward, lowering the fixed outer mold 402 so that its lower end contacts the upper side of the lower filter cloth conveyor belt 209. Then, under the action of hydraulic oil, the main cylinder 501's squeezing piston moves downward, driving the fixed upper mold 403 with it, squeezing the sludge out of the fixed outer mold 402. After ten minutes, the main cylinder 501 retracts, causing the squeezing piston to rise. The main cylinder 501 squeezing piston first rises 2cm and remains there for 5 seconds, primarily to relieve pressure within the sealed chamber. The main cylinder 501 squeezing piston then rises and retracts to its upper limit. Next, the auxiliary cylinder 401 pulls the fixed outer mold 402 upward. Finally, the squeezed sludge is conveyed to the inlet of the shaftless bolt conveyor by the second roller 201, the first power unit 207, and the lower filter cloth conveyor belt 209.

[0075] The present invention has wide practicality and can directly dehydrate sludge with a moisture content of 85%-90% to below 60%. It can operate continuously and automatically, and can be unattended during operation, with a high degree of automation. In addition, the present invention occupies a small area, has few auxiliary equipment, and is easy to maintain.

[0076] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sludge dewatering device, characterized by: including a rack (100); A sludge conveying device (200), the sludge conveying device (200) being mounted on the frame (100) and used for conveying sludge to the next execution station; a sludge shaping device (300), the sludge shaping device (300) being arranged on the frame (100) and being used for shaping the sludge on the sludge transport device (200) into a set shape; a sludge fixing device (400), the sludge fixing device (400) being used to receive and fix the sludge transported by the sludge transport device (200), the sludge fixing device (400) being located within the frame (100); The sludge is transported to the sludge shaping device (300) by the sludge pump. After the sludge is prefabricated into a set shape by the sludge shaping device (300), the sludge transmission device (200) transports the shaped sludge to the sludge fixing device (400). A sludge squeezing device (500), the sludge squeezing device (500) being mounted on the frame (100) and used for squeezing and dehydrating the sludge in the sludge fixing device (400); The sludge shaping device (300) comprises a support member (301) mounted on the frame (100), a second power device (302) being mounted on the support member (301), and a blade (303) being mounted on the output end of the second power device (302); A shaping piece (304) is provided on the outer periphery of the paddle (303), and the shaping piece (304) is connected to the frame (100); the second power device (302) rotates to drive the paddle (303) to rotate and cooperates with the shaping piece (304) to flatten the sludge on the sludge conveying device (200) into a set shape; The sludge transmission device (200) comprises a second roller (201) and a first roller (204); both ends of the second roller (201) and the first roller (204) are mounted on the frame (100) via bearings (202) and bearing seats (203); and a lower filter cloth conveyor belt (209) is mounted outside the second roller (201) and the first roller (204); A first gear (208) is also mounted on the rotating shaft of the second roller (201), a first power device (207) is mounted on the frame (100), a second gear (206) is mounted on the output end of the first power device (207), the first gear (208) and the second gear (206) are powered by a chain (205), and the first power device (207) rotates to move the sludge on the lower filter cloth conveyor belt (209).

2. The sludge dewatering equipment according to claim 1, characterized in that: The sludge fixing device (400) comprises at least one auxiliary oil cylinder (401), the output end of the auxiliary oil cylinder (401) is connected to the outer side wall of the fixed outer mold (402), a fixed upper mold (403) is provided in the inner gap of the fixed outer mold (402), and a first filter plate (404) is installed at the bottom of the fixed upper mold (403); The auxiliary oil cylinder (401) drives the fixed outer mold (402) to move downward to cover the sludge on the sludge transmission device (200) within the fixed outer mold (402).

3. The sludge dewatering equipment according to claim 2, characterized in that: The sludge squeezing device (500) comprises at least one main oil cylinder (501) mounted on the frame (100), the main oil cylinder being located directly above the fixed upper die (403), and the output end of the main oil cylinder (501) moving downward drives the fixed upper die (403) to move downward to squeeze the sludge in the fixed outer die (402).

4. The sludge dewatering equipment according to claim 3, characterized in that: The main oil cylinder (501) and the auxiliary oil cylinder (401) are both connected to a hydraulic station (600).

5. The sludge dewatering equipment according to claim 3, characterized in that: A second filter plate (502) is provided on the lower side of the lower filter cloth conveyor belt (209) and directly below the fixed outer mold (402), and the second filter plate (502) is mounted on the frame (100).

6. The sludge dewatering equipment according to claim 1, characterized in that: The shaping member (304) is annular, and the side surface of the shaping member (304) is connected to the output end of the pre-pressing cylinder (306). The movement of the pre-pressing cylinder (306) drives the shaping member (304) to rotate around the rotation axis (305).

7. The sludge dewatering equipment according to claim 4, characterized in that: The side wall of the fixed outer mold (402) is equipped with four evenly arranged auxiliary oil cylinders (401), and the frame (100) is equipped with four main oil cylinders (501). Distributors (601) are installed on the hydraulic oil inlet pipelines of the auxiliary oil cylinders (401) and the hydraulic oil inlet pipelines of the main oil cylinders (501).

8. The sludge dewatering equipment according to claim 2, characterized in that: The first filter plate (404) is provided with a plurality of evenly arranged protrusions (405).

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