Cylindrical filter assembly and solid-liquid separator and separation method for industrial wastewater treatment

Abstract

The application discloses a cylindrical filtering assembly, a solid-liquid separator for industrial wastewater treatment and a separation method, and belongs to the technical field of solid-liquid separation equipment. The cylindrical filtering assembly comprises a circular filter cartridge, and a feeding pipe is arranged at the top of the circular filter cartridge. The circular filter cartridge comprises an annular pipe, a side filter cartridge, a blocking seat, a blocking plate, an end shell and a fixing rod. The fixing rod is coaxially arranged with the circular filter cartridge and is arranged in the circular filter cartridge. The end shell is fixedly connected with the fixing rod. A pushing block is arranged in the circular filter cartridge. Pushing rods are fixedly arranged at the two sides of the pushing block. Through linkage cooperation of the pushing block and the openable and closable blocking plate, directional pushing and automatic deslagging of solid waste are realized, and the problems of filter hole blockage and easy jamming of the pushing mechanism are relieved. The side filter cartridge is rotationally matched with a ball to clean the filter hole, the filter hole is realized on-line self-cleaning, and the continuous operation cycle is prolonged. The double-side pressure filtering assembly is used for closed extrusion of solid waste, the water content is effectively reduced, and deep dewatering is realized.

Description

Technical Field

[0001] This invention relates to the field of solid-liquid separation equipment technology, and in particular to a cylindrical filter assembly and a solid-liquid separator and separation method for industrial wastewater treatment. Background Technology

[0002] In the field of industrial wastewater treatment, solid-liquid separation is a crucial pretreatment step, aiming to remove suspended solids, recover useful substances, or reduce the load on subsequent biochemical treatments. Traditional solid-liquid separation equipment mostly uses filter screens or filter cloths for interception. However, when treating wastewater containing a large amount of fibrous or sticky solid waste (such as pulp residue in papermaking wastewater and flocculants in dyeing and printing wastewater), filter pores are prone to clogging, leading to a sharp drop in separation efficiency and even requiring equipment shutdown for cleaning, seriously affecting continuous operation.

[0003] To address the clogging problem, various improvements have emerged in existing technologies. For example, solid-liquid separators employing conical filter cartridges with internal helical blades push solid waste towards the narrower end of the cartridge through the rotation of the helical blades, achieving initial dewatering. However, this design has significant shortcomings: when propelling high-viscosity or fibrous solids, the material easily becomes entangled or jammed around the blades, causing a sudden increase in driving torque or even equipment shutdown, severely impacting operational stability and continuity. Furthermore, there are solutions using vibrating screens or scraper filters. However, the former is prone to screen clogging when processing fine fibrous materials, while the latter suffers from rapid wear and high maintenance costs due to the rigid contact between the scraper and the filter screen, and similarly struggles to effectively compress and dewater the separated high-moisture solid waste. Therefore, existing solid-liquid separators generally suffer from poor anti-clogging capabilities and insufficient dewatering of compressible solids when dealing with complex industrial wastewater compositions. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of easy clogging of filter holes, easy jamming of spirals, insufficient dewatering, and scattered processes in the solid-liquid separation of industrial wastewater in the prior art. It proposes a cylindrical filter component and a solid-liquid separator and separation method for industrial wastewater treatment. By using a linear reciprocating pusher block to replace the spiral blades, the fiber entanglement path is eliminated in physical space, solving the jamming problem. Moreover, the pusher is linked to unlocking, gate opening, and slag discharge in an integrated sequence, which automatically completes the slag discharge and synchronously drives filtration, hole cleaning, pusher, and pressure filtration. Combined with the double-sided closed chamber sequential pressure filtration, deep dewatering of solid slag is achieved.

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

[0006] A cylindrical filter assembly includes a circular filter cartridge, the top of which is provided with a feed pipe. The circular filter cartridge includes:

[0007] The annular tube is fixedly connected to the outlet end of the feed tube;

[0008] The side filter cartridges are provided in two sets and are symmetrically rotated on both sides of the annular tube;

[0009] A sealing seat is provided at the opening of each side filter cartridge away from the annular tube, and a sealing plate is movably provided on the side of the sealing seat away from the side filter cartridge;

[0010] The end shell is fixed on the outside of the sealing seat, and the sealing plate moves inside the end shell;

[0011] And a fixing rod, which is coaxially arranged with the circular filter cylinder and placed inside the circular filter cylinder, and the end shell is fixedly connected to the fixing rod;

[0012] The circular filter cylinder is equipped with a pusher block that slides outside the fixed rod. Push rods that move against the sealing plate are fixed on both sides of the pusher block. The movement of the pusher block synchronously triggers the sealing plate to unlock and open, thereby realizing automatic slag discharge.

[0013] Preferably, a first elastic telescopic rod is provided between the sealing plate and the sealing seat, and the fixed end and the moving end of the first elastic telescopic rod are provided with matching limiting holes, and the sealing seat is provided with a plug-in component that matches the limiting holes;

[0014] The plug-in assembly includes a force-bearing block slidably connected to the sealing seat, an elastic element disposed between the force-bearing block and the sealing seat, and a plug-in rod fixedly connected to the force-bearing block via a connecting plate. The plug-in rod is movably inserted into the limiting hole, and a force-bearing inclined surface that cooperates with the pusher block is provided on one side of the force-bearing block.

[0015] Preferably, when the pusher block moves axially along the fixed rod to abut against the force-bearing block, the pusher block acts on the force-bearing inclined surface, driving the force-bearing block to slide in a direction perpendicular to the central axis of the circular filter cartridge, and simultaneously driving the insertion rod to disengage from the limiting hole;

[0016] The pusher block continues to move axially, and the push rod provided on it pushes against the sealing plate, so that a discharge gap is formed between the sealing plate and the sealing seat for solid waste to pass through;

[0017] Solid waste pushed to the sealing seat by the pusher block falls into the end shell through the discharge gap.

[0018] A solid-liquid separator for industrial wastewater treatment includes a cylindrical filter assembly as described above, and a separation shell. A fixing rod is fixed inside the separation shell. The top of the feed pipe passes through the top of the separation shell and extends upward. A discharge pipe is provided at the end of the separation shell away from the feed pipe. A drive assembly for driving a pusher block to reciprocate along the axial direction of the fixing rod is provided inside the separation shell. Water squeezing shells are provided on both sides of the separation shell. A falling channel is provided between the water squeezing shell and the end shell. A filter press assembly for squeezing out liquid from solid waste is provided inside the water squeezing shell. A discharge channel communicating with the outside of the separation shell is connected to the bottom of the water squeezing shell.

[0019] Preferably, the drive assembly includes a rotating rod rotatably disposed within the separation shell, drums disposed at both ends of the rotating rod, traction ropes wound around each drum, and a drive motor fixed to the outside of the separation shell for driving the rotating rod to rotate. The end of the traction rope away from the drum passes through the end shell and the sealing plate and is fixedly connected to the pusher block. The two traction ropes are respectively fixedly connected to both sides of the pusher block.

[0020] Preferably, a protective shell is fixedly provided on the outside of the sealing seat, and a driven gear that is fixedly connected to the end of the side filter cylinder is rotatably connected inside the protective shell. A drive gear that meshes with the driven gear is also rotatably connected inside the protective shell. The drive gear is fixedly connected to the rotating rod, and the side filter cylinder is rotatably connected to the sealing seat.

[0021] Preferably, the inner wall of the separation shell is fixedly provided with a plurality of second elastic telescopic rods, and the end of each second elastic telescopic rod is movably connected with a ball bearing for ejecting waste material from the filter holes in the side filter cylinder wall.

[0022] Preferably, the filter press assembly includes a fixed shell fixed on an annular tube, a bidirectional screw rotatably connected to the fixed shell, two sleeves threadedly connected to the bidirectional screw, a sleeve fixedly connected to each sleeve and sliding outside the bidirectional screw, and a squeeze plate disposed at the end of the sleeve and sliding inside the squeezing shell.

[0023] The bottom of the dewatering shell is configured as a filter plate, and the filter plate is provided with a discharge port for discharging solid waste, which is connected to the discharge channel.

[0024] The fixed housing contains two rotatable synchronous pulleys, a synchronous belt is provided between the two synchronous pulleys, and the two synchronous pulleys are respectively fixedly connected to a bidirectional screw and a rotating rod.

[0025] Preferably, the top of the extrusion plate is fixed with an upper baffle for temporarily blocking the bottom opening of the falling channel, and the sleeve is connected to a lower baffle for temporarily blocking the discharge port via a connecting plate. The lower baffle is configured as a mesh plate, and the bottom of the lower baffle is provided with a guide plate for guiding the liquid.

[0026] When the lower baffle blocks the discharge port, the extrusion plate has not yet moved to the discharge port.

[0027] The present invention also discloses a separation method for a solid-liquid separator for industrial wastewater treatment as described above, comprising the following steps:

[0028] S1: Industrial wastewater is injected from the top of the feed pipe. The wastewater enters the side filter cylinders on both sides through the ring pipe. Solid waste is intercepted, and the filtrate seeps into the separation shell and is finally discharged from the discharge pipe.

[0029] S2: Start the drive motor, and through the meshing of the drive gear and the driven gear, the side filter cartridge rotates slowly, and the elastic ball bearings clean the filter holes of the filter cartridge online.

[0030] S3: The drive motor drives the rotating rod to rotate forward, and the two drums release or rewind the corresponding traction ropes respectively, so that the pusher block moves along the fixed rod axis, and completes the operation of unlocking the sealing plate, opening the discharge gap, and pushing solid waste into the end shell in sequence.

[0031] S4: The rotating rod drives the bidirectional screw to rotate through synchronous transmission. The two sides of the extrusion plates move towards each other. After the water squeezing shell is closed, it applies pressure to the solid waste inside. The squeezed water passes through the lower baffle and enters the separation shell along the guide plate.

[0032] S5: After extrusion is completed, the drive motor reverses, the extrusion plate resets, the lower baffle opens the discharge port, and the blocky solid waste is discharged through the discharge channel;

[0033] S6: When the pusher block moves to the sealing seat on the other side of the circular filter cylinder, the sealing plate that was originally pushed open closes and locks under the action of elasticity, preparing for the next pusher and slag discharge cycle. Repeat steps S1-S5 to achieve continuous solid-liquid separation treatment.

[0034] Compared with the prior art, the present invention provides a cylindrical filter assembly, a solid-liquid separator for industrial wastewater treatment, and a separation method, which have the following advantages:

[0035] 1. This invention achieves the directional pushing of solid waste from the side filter cylinder to the end shell by sliding the pusher block along the axial direction of the fixed rod, in conjunction with the linkage structure of the pusher rod and the sealing plate. The pusher block adopts a linear reciprocating motion, which eliminates the rotational pushing of the traditional spiral blades and avoids the problem of sudden torque increase and machine shutdown caused by high viscosity or fibrous solid waste entanglement or seizing of the blades. At the same time, when the pusher block moves to the sealing seat, the locking of the plug rod to the first elastic telescopic rod is first released by the force block, and then the pusher rod pushes open the sealing plate to form a discharge gap. The whole process is highly automated and reliable, and the slag discharge can be completed without manual intervention, which effectively improves the continuous operation stability of the equipment.

[0036] 2. This invention, through the meshing transmission of the driving gear and the driven gear, enables the side filter cartridge to rotate continuously during the filtration process. Combined with the second elastic telescopic rod fixed to the inner wall of the separation shell and the end ball bearings, online physical unclogging of the filter holes is achieved. When the side filter cartridge rotates and aligns a filter hole with the ball bearing, the ball bearing, under the action of elastic force, extends into the filter hole, pushing out any fibers or sticky waste that may be embedded inside, restoring the permeability of the filter hole. Because the ball bearings are in point contact with the outer wall of the filter cartridge, there is no rigid scraping wear, and each filter hole can be cleaned sequentially as the cartridge rotates. This avoids the gradual clogging caused by long-term load on local filter holes in traditional structures, extending the effective service life of the filter cartridge.

[0037] 3. In this invention, a rotating rod drives a bidirectional screw to rotate via a synchronous wheel and synchronous belt, which in turn drives the extrusion plate to move within the dewatering shell. The upper baffle blocks the falling channel, and the lower baffle blocks the discharge port, forming a closed extrusion chamber within the dewatering shell. The moving extrusion plate applies pressure to the solid waste, fully squeezing out the water contained within the waste. The squeezed-out wastewater flows back into the separation shell through the mesh of the lower baffle and the guide plate. The filter press assembly operates independently of the filtration process, effectively dewatering high-moisture, highly compressible solid waste such as activated sludge and organic residue. After dewatering, the solid can be pressed into blocks with a significantly reduced moisture content, facilitating subsequent transportation, landfilling, or resource utilization.

[0038] 4. This invention simultaneously drives the rotating rod and the bidirectional screw via a drive motor, enabling the three processes of material feeding and slag discharge, filter cylinder rotation and hole cleaning, and extrusion dewatering to be coordinated and linked through the same power source, resulting in efficient transmission and simple control. The continuous rotation of the side filter cylinder allows the filter holes in each section of the circumference to take turns bearing the filtration load, avoiding premature saturation and failure of local filter holes, and effectively extending the duration of the filtration cycle. At the same time, the bidirectional pushing stroke of the material pusher block, combined with the connection design between the falling channel and the extrusion shell, realizes continuous operation of the entire process from filtration, material feeding, slag discharge to extrusion dewatering, improving the solid-liquid separation throughput and dewatering effect per unit time. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the present invention;

[0040] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0041] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0042] Figure 4 for Figure 2 Enlarged structural diagram of section B;

[0043] Figure 5 This is a schematic diagram of the external structure of the circular filter cartridge of the present invention;

[0044] Figure 6 This is a schematic diagram of the separation structure of the circular filter cartridge of the present invention;

[0045] Figure 7 This is a schematic diagram of the meshing structure of the drive gear and the driven gear of the present invention;

[0046] Figure 8 This is a cross-sectional structural diagram of the falling channel of the present invention;

[0047] Figure 9 for Figure 8 Enlarged structural diagram of section C;

[0048] Figure 10 This is a schematic diagram of the structure of the extrusion plate of the present invention when it is not being extruded;

[0049] Figure 11 This is a cross-sectional structural diagram of the fixed shell of the present invention.

[0050] In the diagram: 1. Circular filter cartridge; 101. Annular tube; 102. Side filter cartridge; 103. Sealing seat; 104. Sealing plate; 105. End shell; 2. Feed pipe; 3. Fixing rod; 4. Pushing block; 401. Push rod; 5. First elastic telescopic rod; 501. Limiting hole; 6. Force-bearing block; 601. Elastic element; 602. Insertion rod; 7. Separation shell; 701. Discharge pipe; 8. Dewatering shell; 801. Discharge port; 9. Falling channel ; 10. Discharge channel; 11. Rotating rod; 111. Drum; 112. Traction rope; 113. Drive motor; 12. Protective shell; 121. Driven gear; 122. Drive gear; 13. Fixed shell; 131. Bidirectional screw; 132. Sleeve; 133. Tube; 134. Extrusion plate; 14. Second elastic telescopic rod; 141. Ball bearing; 15. Upper baffle; 16. Lower baffle; 161. Guide plate; 17. Synchronous pulley. Detailed Implementation

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0052] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, this embodiment proposes a cylindrical filter assembly, including a circular filter cylinder 1. The top of the circular filter cylinder 1 is provided with a feed pipe 2 for feeding industrial wastewater to be filtered into the circular filter cylinder 1. The circular filter cylinder 1 includes an annular pipe 101, a side filter cylinder 102, a sealing seat 103, a sealing plate 104, an end shell 105, and a fixing rod 3. The sealing surface of the sealing plate 104 is fitted with a wear-resistant rubber sealing ring and adopts a lip-shaped sealing structure to prevent solid particles from easily entering the sealing surface.

[0054] Specifically, the annular pipe 101 is fixedly connected to the outlet end of the feed pipe 2, used to evenly distribute the wastewater input from the feed pipe 2 to both sides; two sets of side filter cylinders 102 are provided, and the two sets of side filter cylinders 102 are symmetrically rotated on both sides of the annular pipe 101. Filter holes are evenly opened on the cylinder wall of the side filter cylinders 102 for solid-liquid separation of the wastewater; the sealing seat 103 is provided at the opening of the end of each side filter cylinder 102 away from the annular pipe 101, and the side of the sealing seat 103 away from the side filter cylinder 102 is movably provided with... The sealing plate 104 is used to close the port of the sealing seat 103 under normal conditions to prevent solid waste from falling off without being pushed. The end shell 105 is fixed on the outside of the sealing seat 103, and the sealing plate 104 is movably disposed in the end shell 105. The end shell 105 provides space for the movement of the sealing plate 104. The fixing rod 3 is coaxially arranged with the circular filter cylinder 1 and placed inside the circular filter cylinder 1. The end shell 105 is fixedly connected to the fixing rod 3, thereby supporting and fixing the entire circular filter cylinder 1 on the fixing rod 3.

[0055] The circular filter cylinder 1 is provided with a pusher block 4 that slides on the outside of the fixed rod 3. The pusher block 4 can slide back and forth along the axial direction of the fixed rod 3 to push the solid waste intercepted in the side filter cylinders 102 on both sides toward the sealing seat 103. Push rods 401 are fixed on both sides of the pusher block 4. The push rods 401 extend toward the sealing plate 104 and are used to move and abut against the sealing plate 104 when the pusher block 4 moves to the vicinity of the sealing seat 103, thereby pushing the sealing plate 104 to open.

[0056] like Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, a first elastic telescopic rod 5 is further provided between the sealing plate 104 and the sealing seat 103. The fixed end and the moving end of the first elastic telescopic rod 5 are provided with matching limiting holes 501. When the first elastic telescopic rod 5 is in the locked state, its length is fixed, thereby keeping the sealing plate 104 and the sealing seat 103 in close contact. The sealing seat 103 is provided with a plug-in assembly that matches the limiting hole 501.

[0057] Specifically, the plug-in assembly includes a force-bearing block 6 slidably connected to the sealing seat 103, an elastic element 601 disposed between the force-bearing block 6 and the sealing seat 103, and a plug-in rod 602 fixedly connected to the force-bearing block 6 via a connecting plate; the plug-in rod 602 is movably inserted into the limiting hole 501 to limit the extension and retraction of the first elastic telescopic rod 5. One side of the force-bearing block 6 is provided with a force-bearing inclined surface that cooperates with the pusher block 4. When the pusher block 4 moves to the force-bearing block 6, the pusher block 4 abuts against the force-bearing inclined surface. Through the inclined surface cooperation, the axial force of the pusher block 4 is converted into the radial force of the force-bearing block 6, driving the force-bearing block 6 to slide in a direction perpendicular to the central axis of the circular filter cartridge 1.

[0058] like Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, further, when the pusher block 4 moves axially along the fixed rod 3 to abut against the force-bearing block 6, the pusher block 4 acts on the force-bearing inclined surface, driving the force-bearing block 6 to slide in a direction perpendicular to the central axis of the circular filter cylinder 1, and simultaneously driving the insertion rod 602 to disengage from the limiting hole 501, thereby releasing the restriction on the length of the first elastic telescopic rod 5; the pusher block 4 continues to move axially, and the push rod 401 provided on it pushes against the sealing plate 104, causing the sealing plate 104 to... 4 overcomes the elastic force of the first elastic telescopic rod 5 and moves away from the sealing seat 103, forming a discharge gap between them for solid waste to pass through; the solid waste pushed to the sealing seat 103 by the pusher block 4 falls into the end shell 105 through the discharge gap, completing the slag discharge action; when the pusher block 4 is reversed and reset, the sealing plate 104 is reset under the elastic force of the first elastic telescopic rod 5, the force block 6 is reset under the elastic force of the elastic element 601, and the plug rod 602 is re-inserted into the limiting hole 501 to complete the locking;

[0059] The insertion rod 602 restricts the first elastic telescopic rod 5: During the normal filtration stage, wastewater continuously enters the side filter cylinder 102 and undergoes solid-liquid separation. Solid waste gradually accumulates inside the side filter cylinder 102. If the sealing plate 104 is kept closed solely by the elastic force of the first elastic telescopic rod 5, large fluctuations in the liquid pressure inside the side filter cylinder 102 or vibrations generated during equipment operation may overcome the elastic force and push the sealing plate 104 open. The unseparated solid-liquid mixture will leak directly from the sealing seat 103 port, causing filtration failure. Solid waste will fall prematurely into the end shell 105, disrupting the pushing and squeezing process. In the sequential process, wastewater enters the subsequent squeezing stage without being fully filtered, increasing the squeezing burden. After the plug rod 602 is inserted into the limiting hole 501, the length of the first elastic telescopic rod 5 is fixed, and the sealing plate 104 and the sealing seat 103 remain rigidly locked. No matter how the internal pressure changes, the sealing plate 104 will not open on its own, ensuring the sealing reliability of the filtration stage. In the stage where the pusher block 4 moves axially along the fixed rod 3 and has not yet come into contact with the force block 6, most of the liquid in the side filter cylinder 102 area between the pusher block 4 and the sealing plate 104 has passed through the filter hole and completed solid-liquid separation, with only the intercepted solid waste remaining in this area.

[0060] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 8 As shown, as a preferred embodiment, based on the above method, a solid-liquid separator for industrial wastewater treatment is further proposed, including the above-mentioned cylindrical filter assembly and a separation shell 7; a fixing rod 3 is fixed inside the separation shell 7, the top of the feed pipe 2 passes through the top of the separation shell 7 and extends upward, for connecting with an external wastewater supply pipeline; a discharge pipe 701 is provided at the end of the separation shell 7 away from the feed pipe 2, for discharging the separated clear liquid; a drive assembly for driving the pusher block 4 to reciprocate along the axis of the fixing rod 3 is provided inside the separation shell 7, a squeezing shell 8 is provided on both sides of the separation shell 7, a falling channel 9 is provided between the squeezing shell 8 and the end shell 105, and the solid waste discharged from the end shell 105 enters the squeezing shell 8 through the falling channel 9; a filter press assembly for squeezing out the liquid in the solid waste is provided inside the squeezing shell 8, and a discharge channel 10 connected to the outside of the separation shell 7 is connected to the bottom of the squeezing shell 8, for discharging the dehydrated solid waste.

[0061] like Figure 1 , Figure 3 and Figure 5As shown, in a preferred embodiment, based on the above method, the drive assembly further includes a rotating rod 11 rotatably disposed within the separation shell 7, drums 111 disposed at both ends of the rotating rod 11, a traction rope 112 wound and connected to each drum 111, and a drive motor 113 fixed to the outside of the separation shell 7 for driving the rotating rod 11 to rotate; one end of the traction rope 112 away from the drum 111 passes through the end shell 105 and the sealing plate 104 and is fixedly connected to the pusher block 4, and the two traction ropes 112 are respectively fixedly connected to both sides of the pusher block 4; the traction rope 112 is made of wear-resistant and corrosion-resistant material, and a structure for guiding the traction rope 112, such as a fixed pulley, should be provided inside the separation shell 7; the drive motor 113 is equipped with an overload protector, which automatically stops the machine when the torque exceeds the threshold.

[0062] Specifically, when the drive motor 113 drives the rotating rod 11 to rotate in the forward direction, one of the drums 111 winds up the traction rope 112, and the other drum 111 releases the traction rope 112, thereby causing the pusher block 4 to move to one side along the fixed rod 3; when the drive motor 113 rotates in the reverse direction, the previously wound drum 111 releases the traction rope 112, and the previously released drum 111 winds up the traction rope 112, causing the pusher block 4 to move to the other side along the fixed rod 3; through the forward and reverse rotation control of the drive motor 113, the reciprocating motion of the pusher block 4 in the circular filter cylinder 1 is realized.

[0063] like Figure 2 , Figure 5 and Figure 7 As shown, in a preferred embodiment, based on the above method, a protective shell 12 is further provided on the outside of the sealing seat 103. A driven gear 121 that is fixedly connected to the end of the side filter cylinder 102 is rotatably connected inside the protective shell 12. A drive gear 122 that meshes with the driven gear 121 is also rotatably connected inside the protective shell 12. The drive gear 122 is fixedly connected to the rotating rod 11. The side filter cylinder 102 is rotatably connected to the sealing seat 103.

[0064] Specifically, when the rotating rod 11 rotates, the drive gear 122 rotates synchronously with the rotating rod 11, and through meshing with the driven gear 121, drives the side filter cylinder 102 to rotate around its axis. The rotation of the side filter cylinder 102 causes the filter holes on the cylinder wall to face different directions in turn. On the one hand, this allows different positions on the cylinder wall to take turns bearing the filtration load, avoiding premature saturation of local filter holes due to long-term operation; on the other hand, it creates conditions for subsequent hole cleaning.

[0065] like Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, a plurality of second elastic telescopic rods 14 are fixedly provided on the inner wall of the separation shell 7, and the end of each second elastic telescopic rod 14 is movably connected to a ball bearing 141 for ejecting waste material in the filter hole of the side filter cylinder 102.

[0066] Specifically, the second elastic telescopic rod 14 always maintains elastic contact with the outer wall of the side filter cylinder 102. When the side filter cylinder 102 rotates, the ball bearing 141 rolls along the outer wall of the side filter cylinder 102. When the ball bearing 141 moves to a position opposite to the filter hole, under the elastic force of the second elastic telescopic rod 14, the ball bearing 141 extends into the filter hole and pushes out any waste material that may be embedded in the filter hole, thus achieving online self-cleaning of the filter hole. Since the ball bearing 141 is spherical, as the side filter cylinder 102 continues to rotate, the ball bearing 141 can smoothly move out of the filter hole and return to the outer surface of the side filter cylinder 102, making it less likely to get stuck.

[0067] like Figure 2 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, the filter press assembly further includes a fixed shell 13 fixed to the annular tube 101, a bidirectional screw 131 rotatably connected to the fixed shell 13, two sleeves 132 threadedly connected to the bidirectional screw 131, a sleeve 133 fixedly connected to each sleeve 132 and sliding outside the bidirectional screw 131, and a squeeze plate 134 disposed at the end of the sleeve 133 and sliding inside the squeezing shell 8; the bottom of the squeezing shell 8 is configured as a filter plate, and the filter plate is provided with an outlet 801 for discharging solid waste. 1. It is connected to the discharge channel 10; two synchronous pulleys 17 are rotatably connected inside the fixed shell 13, and a synchronous belt is provided between the two synchronous pulleys 17. The two synchronous pulleys 17 are respectively fixedly connected to the bidirectional screw 131 and the rotating rod 11. It should be noted that the sleeve 133 is sleeved on the outside of the screw and slidably connected to the smooth section of the screw, which effectively prevents impurities that may exist in the liquid from entering the thread area and affecting the transmission of the sleeve 132. In high-concentration working conditions, an auxiliary pneumatic pusher can be added to reduce the main drive load. The extrusion plate 134 should be provided with raised texture to strengthen the dewatering channel and prevent mud cake from sticking.

[0068] Specifically, when the rotating rod 11 rotates, it drives the bidirectional screw 131 to rotate synchronously through the transmission of the synchronous pulley 17 and the synchronous belt. Each end of the bidirectional screw 131 is provided with a threaded section that cooperates with the corresponding sleeve 132. The two sleeves 132 are axially displaced under the action of their respective cooperating threaded sections. When the bidirectional screw 131 rotates, the sleeve 132 moves along the screw axis. The sleeve 132 drives the extrusion plate 134 to slide inside the dewatering shell 8 through the sleeve 133, extruding and dewatering the solid waste inside the dewatering shell 8. The extruded wastewater flows out through the filter plate at the bottom of the dewatering shell 8, while the solid waste is intercepted inside the dewatering shell 8.

[0069] like Figure 8 , Figure 9 and Figure 10As shown, in a preferred embodiment, based on the above method, an upper baffle 15 for temporarily blocking the bottom opening of the falling channel 9 is fixed to the top of the extrusion plate 134, and a lower baffle 16 for temporarily blocking the discharge port 801 is connected to the sleeve 132 via a connecting plate. The lower baffle 16 is configured as a mesh plate, and a guide plate 161 for guiding the liquid is provided at the bottom of the lower baffle 16. When the lower baffle 16 blocks the discharge port 801, the extrusion plate 134 has not yet moved to the discharge port 801.

[0070] Specifically, when the sleeve 132 moves the extrusion plate 134 into the squeezing shell 8, the upper baffle 15 first blocks the bottom opening of the falling channel 9 to prevent subsequent solid waste from entering the squeezing shell 8; at the same time, the lower baffle 16 blocks the discharge port 801, making the squeezing shell 8 a closed extrusion chamber; then the extrusion plate 134 continues to move forward, applying extrusion to the solid waste in the closed chamber, and the squeezed wastewater flows back into the separation shell 7 through the mesh of the lower baffle 16 and the guide plate 161; when the extrusion is completed and the drive motor 113 reverses, the sleeve 132 moves the extrusion plate 134 back to its original position, the upper baffle 15 leaves the bottom opening of the falling channel 9, the lower baffle 16 leaves the discharge port 801, and the solid waste that has been squeezed into blocks falls from the discharge port 801 and is discharged outside the separation shell 7 through the discharge channel 10.

[0071] The complete and detailed work process is as follows:

[0072] Filtration Stage: Industrial wastewater enters from the top of inlet pipe 2 and flows downwards to annular pipe 101. Annular pipe 101 is a hollow annular structure, fixedly connected to the outlet end of inlet pipe 2. After entering annular pipe 101, the wastewater is evenly distributed to the side filter cylinders 102 on both sides. The side filter cylinders 102 are cylindrical structures with multiple filter holes evenly distributed on the cylinder wall. After entering the side filter cylinders 102, the wastewater seeps out through the filter holes under the action of gravity. The solid waste is intercepted inside the side filter cylinders 102, and the clear liquid seeps out into the filter. The wastewater is discharged and collected through the discharge pipe 701 at the bottom of the separation shell 7. During this process, the drive motor 113 can drive the rotating rod 11 to rotate at a low speed. The drive gear 122 on the rotating rod 11 meshes with the driven gear 121 in the protective shell 12. The driven gear 121 is fixedly connected to the end of the side filter cylinder 102, thereby driving the side filter cylinder 102 to rotate slowly around its axis. The rotation of the side filter cylinder 102 causes the filter holes of each section of the circumference to face the direction of the wastewater flow in turn, avoiding premature saturation and blockage of local filter holes due to long-term filtration load.

[0073] Filter pore self-cleaning stage: While the side filter cylinder 102 rotates, several second elastic telescopic rods 14 fixed to the inner wall of the separation shell 7 always maintain elastic contact with the outer wall of the side filter cylinder 102; each second elastic telescopic rod 14 has a ball bearing 141 movably connected to its end, and the ball bearing 141 rolls tightly against the outer wall of the side filter cylinder 102 under the action of elastic force; when the side filter cylinder 102 rotates so that a certain filter hole is exactly aligned with the ball bearing 141, the ball bearing 141 extends into the filter hole under the action of elastic force of the second elastic telescopic rod 14, pushing out fibrous or sticky waste that may be embedded in the filter hole, restoring the permeability of the filter hole; as the side filter cylinder 102 continues to rotate, the ball bearing 141 moves out of the filter hole and returns to the outer surface of the side filter cylinder 102, ready to clean the next filter hole; this cycle repeats, realizing online self-cleaning of all filter holes without the need for manual cleaning by stopping the machine;

[0074] Material pushing and slag discharge stage: As the rotating rod 11 rotates, the drums 111 at both ends of the rotating rod 11 rotate accordingly. One drum 111 winds up the traction rope 112, while the other drum 111 releases the traction rope 112. One end of the traction rope 112 passes through the end shell 105 and the sealing plate 104 and is fixedly connected to the pushing block 4. Therefore, under the pull of the wound traction rope 112, the pushing block 4 moves to one side along the axis of the fixed rod 3. During the movement, the pushing block 4 pushes the solid waste intercepted in the side filter cylinder 102 towards the sealing seat 103. As the pusher block 4 moves closer to the sealing seat 103, it first abuts against the inclined surface of the force-bearing block 6. The pusher block 4 continues forward, converting the axial thrust into radial thrust through the inclined surface, forcing the force-bearing block 6 to slide in a direction perpendicular to the central axis of the circular filter cartridge 1. The force-bearing block 6 is fixedly connected to the insertion rod 602 via a connecting plate. Therefore, the sliding of the force-bearing block 6 synchronously drives the insertion rod 602 to disengage from the limiting hole 501, releasing the restriction on the length locking of the first elastic telescopic rod 5. At this time, the first elastic telescopic rod 5 is no longer locked, and the sealing plate... 104 can move relative to the sealing seat 103. The pusher block 4 continues to move axially, and the push rod 401 fixed on it pushes against the sealing plate 104, causing the sealing plate 104 to overcome the elastic force of the first elastic telescopic rod 5 and move away from the sealing seat 103, forming a discharge gap for solid waste to pass through. The solid waste pushed to the sealing seat 103 by the pusher block 4 falls into the end shell 105 through the discharge gap, and then enters the dewatering shell 8 through the falling channel 9 connected to the bottom of the end shell 105, waiting for subsequent dewatering treatment. The pusher block 4 continues to move until it reaches the sealing seat 103. The material reaches the edge of the sealing seat 103 to ensure that all solid waste has been pushed out; then, the drive motor 113 is controlled to rotate in the opposite direction, and the pusher block 4 is pulled back along the fixed rod 3 by the traction rope 112 on the other side; after the pusher block 4 leaves, the sealing plate 104 is reset under the elastic force of the first elastic telescopic rod 5 and re-fits the sealing seat 103; the force block 6 is reset under the elastic force of the elastic element 601, which drives the plug rod 602 to re-insert into the limiting hole 501, completing the locking of the first elastic telescopic rod 5 and restoring the sealing plate 104 to the normally closed state;

[0075] In the extrusion and dewatering stage: while pushing and discharging slag, the rotation of the rotating rod 11 drives the bidirectional screw 131 to rotate synchronously through the synchronous pulley 17 and the synchronous belt; both ends of the bidirectional screw 131 are provided with threaded sections, and two sleeves 132 are threadedly connected to these two threaded sections respectively. When the bidirectional screw 131 rotates, the two sleeves 132 move along the screw axis; the sleeves 132 drive the extrusion plate 134 to slide inside the dewatering shell 8 through the sleeve 133; during the forward movement of the extrusion plate 134, the upper baffle 15 fixed at its top first blocks the falling passage. The bottom opening of channel 9 prevents subsequent solid waste from entering the squeezing shell 8. At the same time, the sleeve 132 blocks the discharge port 801 through the lower baffle 16 connected by the connecting plate, so that the squeezing shell 8 forms a closed squeezing chamber. Then the squeezing plate 134 continues to move forward and applies pressure to the solid waste in the closed chamber. The squeezed wastewater passes through the mesh of the lower baffle 16 and flows back to the interior of the separation shell 7 through the guide plate 161, realizing the recycling and reuse of wastewater. The solid waste is gradually dehydrated under the squeezing action, forming blocky solids with low moisture content.

[0076] Discharge and reset stage: After the extrusion and dewatering are completed, the drive motor 113 is controlled to rotate in the opposite direction, the rotating rod 11 is reversed, the bidirectional screw 131 is reversed accordingly, and the two sleeves 132 move back along the screw axis; the extrusion plate 134 is retracted and reset, the upper baffle 15 leaves the bottom opening of the falling channel 9, allowing the next batch of solid waste to enter the extrusion shell 8; the lower baffle 16 leaves the discharge port 801, and the solid waste that has been extruded into blocks falls from the discharge port 801 under the action of gravity and is discharged from the outside of the separation shell 7 through the discharge channel 10, completing the collection of solid waste; a complete working cycle ends, the equipment motor continues to work, and the next round of filtration, pushing, extrusion and discharge operations are carried out to realize continuous solid-liquid separation treatment.

[0077] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0078] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cylindrical filter assembly, comprising a circular filter cartridge (1), wherein a feed pipe (2) is provided at the top of the circular filter cartridge (1), characterized in that, The circular filter cartridge (1) includes: The annular pipe (101) is fixedly connected to the discharge end of the feed pipe (2); The side filter cartridges (102) are provided in two sets and are symmetrically rotated on both sides of the annular tube (101); A sealing seat (103) is provided at the opening of one end of each side filter cylinder (102) away from the annular pipe (101), and a sealing plate (104) is movably provided on the side of the sealing seat (103) away from the side filter cylinder (102). The end shell (105) is fixed on the outside of the sealing seat (103), and the sealing plate (104) is movable inside the end shell (105); And a fixing rod (3), which is coaxially arranged with the circular filter cylinder (1) and placed inside the circular filter cylinder (1), and the end shell (105) is fixedly connected to the fixing rod (3); The circular filter cylinder (1) is provided with a pusher block (4) that slides outside the fixed rod (3). The two sides of the pusher block (4) are fixed with push rods (401) that move against the sealing plate (104). The movement of the pusher block (4) synchronously triggers the sealing plate (104) to unlock and open, thereby realizing automatic slag discharge.

2. The cylindrical filter assembly according to claim 1, characterized in that, A first elastic telescopic rod (5) is provided between the sealing plate (104) and the sealing seat (103). The fixed end and the moving end of the first elastic telescopic rod (5) are provided with matching limiting holes (501). The sealing seat (103) is provided with a plug-in component that matches the limiting hole (501). The plug-in assembly includes a force-bearing block (6) slidably connected to the sealing seat (103), an elastic element (601) disposed between the force-bearing block (6) and the sealing seat (103), and a plug-in rod (602) fixedly connected to the force-bearing block (6) via a connecting plate. The plug-in rod (602) is movably inserted into the limiting hole (501). One side of the force-bearing block (6) is provided with a force-bearing inclined surface that cooperates with the pusher block (4).

3. A cylindrical filter assembly according to claim 2, characterized in that, When the pusher block (4) moves axially along the fixed rod (3) to abut against the force-bearing block (6), the pusher block (4) acts on the force-bearing inclined surface, driving the force-bearing block (6) to slide in a direction perpendicular to the central axis of the circular filter cylinder (1), and simultaneously driving the plug rod (602) to disengage from the limiting hole (501). The pusher block (4) continues to move along the axial direction, and the push rod (401) provided on it pushes against the sealing plate (104), so that a discharge gap for solid waste to pass through is formed between the sealing plate (104) and the sealing seat (103); Solid waste pushed to the sealing seat (103) by the pusher block (4) falls into the end shell (105) through the discharge gap.

4. A solid-liquid separator for industrial wastewater treatment, comprising the cylindrical filter assembly described in claim 3, characterized in that, It also includes a separation shell (7), the fixing rod (3) is fixed inside the separation shell (7), the top of the feed pipe (2) passes through the top of the separation shell (7) and extends upward, a discharge pipe (701) is provided at one end of the separation shell (7) away from the feed pipe (2), a driving component for driving the pusher block (4) to move back and forth along the axis of the fixing rod (3) is provided inside the separation shell (7), a squeezing shell (8) is provided on both sides of the separation shell (7), a falling channel (9) is provided between the squeezing shell (8) and the end shell (105), a filter press assembly for squeezing out the liquid in the solid waste is provided inside the squeezing shell (8), and a discharge channel (10) connected to the outside of the separation shell (7) is connected to the bottom of the squeezing shell (8).

5. A solid-liquid separator for industrial wastewater treatment according to claim 4, characterized in that, The drive assembly includes a rotating rod (11) rotatably disposed inside the separation shell (7), drums (111) disposed at both ends of the rotating rod (11), traction ropes (112) wound around each drum (111), and a drive motor (113) fixed outside the separation shell (7) for driving the rotating rod (11) to rotate. The end of the traction rope (112) away from the drum (111) passes through the end shell (105) and the sealing plate (104) and is fixedly connected to the pusher block (4). The two traction ropes (112) are fixedly connected to the two sides of the pusher block (4) respectively.

6. A solid-liquid separator for industrial wastewater treatment according to claim 5, characterized in that, A protective shell (12) is fixedly provided on the outside of the sealing seat (103). A driven gear (121) that is fixedly connected to the end of the side filter cylinder (102) is rotatably connected inside the protective shell (12). A drive gear (122) that meshes with the driven gear (121) is also rotatably connected inside the protective shell (12). The drive gear (122) is fixedly connected to the rotating rod (11). The side filter cylinder (102) is rotatably connected to the sealing seat (103).

7. A solid-liquid separator for industrial wastewater treatment according to claim 6, characterized in that, The inner wall of the separation shell (7) is fixed with a number of second elastic telescopic rods (14), and the end of each second elastic telescopic rod (14) is movably connected with a ball (141) for ejecting waste material in the filter hole of the side filter cylinder (102).

8. A solid-liquid separator for industrial wastewater treatment according to claim 7, characterized in that, The filter press assembly includes a fixed shell (13) fixed on an annular tube (101), a bidirectional screw (131) rotatably connected to the fixed shell (13), two sleeves (132) threadedly connected to the bidirectional screw (131), a sleeve (133) fixedly connected to each sleeve (132) and sliding outside the bidirectional screw (131), and a squeeze plate (134) provided at the end of the sleeve (133) and sliding inside the squeezing shell (8). The bottom of the dewatering shell (8) is configured as a filter plate, and the filter plate is provided with a discharge port (801) for discharging solid waste. The discharge port (801) is connected to the discharge channel (10). Two synchronous pulleys (17) are rotatably connected inside the fixed shell (13). A synchronous belt is provided between the two synchronous pulleys (17), and the two synchronous pulleys (17) are fixedly connected to the bidirectional screw (131) and the rotating rod (11) respectively.

9. A solid-liquid separator for industrial wastewater treatment according to claim 8, characterized in that, The top of the extrusion plate (134) is fixed with an upper baffle (15) for temporarily blocking the bottom opening of the falling channel (9), and the sleeve (132) is connected to a lower baffle (16) for temporarily blocking the discharge port (801) via a connecting plate. The lower baffle (16) is set as a mesh plate, and the bottom of the lower baffle (16) is provided with a guide plate (161) for guiding the liquid. When the lower baffle (16) blocks the discharge port (801), the extrusion plate (134) has not yet moved to the discharge port (801).

10. A separation method for a solid-liquid separator used in industrial wastewater treatment according to claim 9, characterized in that, Includes the following steps: S1: Industrial wastewater is injected from the top of the feed pipe (2). The wastewater enters the side filter cylinders (102) on both sides through the ring pipe (101). Solid waste is intercepted, and the filtrate seeps into the separation shell (7) and is finally discharged from the discharge pipe (701). S2: Start the drive motor (113), and through the meshing transmission of the drive gear (122) and the driven gear (121), make the side filter cartridge (102) rotate slowly, and cooperate with the elastically telescopic ball (141) to clean the filter holes of the filter cartridge online; S3: The drive motor (113) drives the rotating rod (11) to rotate forward, and the two drums (111) release or rewind the corresponding traction ropes (112) respectively, so that the pusher block (4) moves along the fixed rod (3) axially, and completes the operation of unlocking the sealing plate (104), opening the discharge gap, and pushing solid waste into the end shell (105) in sequence. S4: The rotating rod (11) drives the bidirectional screw (131) to rotate through synchronous transmission. The two sides of the extrusion plates (134) move towards each other. After the water squeezing shell (8) is closed, it applies pressure to the solid waste inside. The squeezed water passes through the lower baffle (16) and enters the separation shell (7) along the guide plate (161). S5: After extrusion is completed, the drive motor (113) reverses, the extrusion plate (134) resets, the lower baffle (16) opens the discharge port (801), and the blocky solid waste is discharged through the discharge channel (10); S6: When the pusher block (4) moves to the sealing seat (103) on the other side of the circular filter cylinder (1), the sealing plate (104) that was originally pushed open closes and locks under the action of elasticity, preparing for the next pusher slag discharge cycle. Repeat steps S1-S5 to achieve continuous solid-liquid separation treatment.

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