Solid-liquid separation device for chemical sewage treatment

Abstract

The invention relates to the field of solid-liquid separation devices, in particular to a solid-liquid separation device for chemical sewage treatment, which comprises a driving shell, the rear end of the driving shell is fixedly connected with a filtering outer cylinder, the right end of the filtering outer cylinder is fixedly connected with a discharging frame, the top end of the driving shell is fixedly connected with a mixing cylinder, and the front end of the mixing cylinder is in flange connection with a feeding pipe. A stirring motor is fixedly connected to the top end of the mixing barrel, a stirring rod is fixedly connected to the output end of the stirring motor, a feeding auger is fixedly connected to the bottom end of the stirring rod, and a transfer pipe is fixedly connected to the top wall of the driving shell and communicates with the mixing barrel. The multiple groups of fixed rings are fixed on the inner side wall of the filtering outer cylinder through the fixing rods, the filtering area is large, the structure is compact, disassembly and maintenance are convenient, alternate extrusion and release of filter cakes are achieved, the multiple groups of liquid leakage hole groups are formed in the bottom end of the filtering outer cylinder and are arranged between the adjacent fixed rings, and therefore the filtering efficiency is improved. And the filtrate flows out of the filtering chamber nearby and is converged into the liquid bearing frame.

Description

Technical Field

[0001] This invention relates to the field of solid-liquid separation devices, and more specifically to a solid-liquid separation device for chemical wastewater treatment. Background Technology

[0002] Solid-liquid separation is a crucial step in the treatment of chemical wastewater. Existing solid-liquid separation devices mainly include plate and frame filter presses, belt filter presses, and centrifuges. While plate and frame filter presses offer good dewatering results, they operate intermittently, resulting in low efficiency, and the filter cloth cleaning is cumbersome. Belt filter presses can operate continuously, but they are prone to filter belt clogging and sludge leakage when dealing with highly viscous chemical sludge. Centrifuges offer fast processing speeds but consume a lot of energy, are sensitive to fluctuations in feed concentration, and experience severe equipment wear.

[0003] Traditional filtration devices often struggle to balance continuous operation and deep dewatering in the production of highly viscous and compressible sludge commonly found in chemical wastewater. Problems such as easy clogging of the filter screen, poor sludge discharge, and high moisture content in the filter cake are common, affecting subsequent treatment efficiency and disposal costs.

[0004] Therefore, it is necessary to invent a solid-liquid separation device for chemical wastewater treatment to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a solid-liquid separation device for chemical wastewater treatment. By cooperating with the drive shell and filter outer cylinder and other parts, it solves the problems of high viscosity and high compressibility sludge commonly found in chemical wastewater in the prior art. Traditional filtration devices often struggle to balance continuous operation and deep dewatering, and problems such as easy clogging of the filter screen, poor sludge discharge, and high moisture content of the filter cake are common, affecting the efficiency of subsequent treatment and disposal costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a solid-liquid separation device for chemical wastewater treatment, comprising a drive housing, a filter outer cylinder fixedly connected to the rear end of the drive housing, a discharge rack fixedly connected to the right end of the filter outer cylinder, a mixing cylinder fixedly connected to the top end of the drive housing, a feed pipe connected to the front flange of the mixing cylinder, a stirring motor fixedly connected to the top end of the mixing cylinder, a stirring rod fixedly connected to the output end of the stirring motor, a feeding auger fixedly connected to the bottom end of the stirring rod, and a rotating... The transfer pipe is connected to the mixing cylinder. A drive motor is installed on the front side of the drive housing. A transmission pulley is fixedly connected to the output end of the drive motor. A transmission belt is sleeved on the outer wall of the transmission pulley. The end of the transmission belt away from the transmission pulley is wrapped with a drive shaft. A driven pulley is fixedly connected to the front end of the drive shaft. The driven pulley is rotatably connected to the inner wall of the drive housing. The drive housing, the outer filter cylinder, and the discharge rack form a three-section main body. The wastewater is premixed and transported using the mixing cylinder and its internal stirring motor, stirring rod, and feeding auger.

[0007] In a preferred embodiment of the present invention, a protective cover is bolted to the inner wall of the drive housing. The protective cover covers the drive pulley and the drive belt. The end of the drive shaft away from the drive belt is rotatably connected to the inner wall of the filter outer cylinder, and the drive shaft passes through the inner wall of the filter outer cylinder and extends to the front of the discharge rack. By covering the drive pulley and the drive belt with the protective cover, foreign objects are prevented from being caught or accidentally touched by personnel. At the same time, it ensures that the drive shaft passes through and is rotatably connected to the filter outer cylinder and the discharge rack, providing stable rotational support for the subsequent filtration unit.

[0008] In a preferred embodiment of the present invention, the inner wall of the filter outer cylinder is provided with six sets of fixing rods, and both ends of the fixing rods are fixedly connected to the inner wall of the filter outer cylinder. The outer wall of the fixing rods is fixedly connected with several sets of fixed rings. A movable ring is provided between two sets of fixed rings. An elastic spacer sleeve is installed between two sets of fixed rings and is sleeved on the outer wall of the fixing rods. The fixing rods fix the fixed rings inside the filter outer cylinder. The elastic spacer sleeve maintains the precise distance between adjacent fixed rings. A movable movable ring is provided between the fixed rings to provide a basis for subsequent compression filtration.

[0009] As a preferred embodiment of the present invention, a plurality of first cams, second cams and third cams are fixedly connected to the outer side wall of the drive shaft. The total number of first cams, second cams and third cams is the same as that of the moving ring. The first cams, second cams and third cams are distributed sequentially on the surface of the drive shaft in this order, so as to convert the rotational motion of the drive shaft into the axial reciprocating motion of the moving ring. The first cams, second cams and third cams distributed sequentially along the axial direction drive the corresponding moving rings respectively, so as to realize the asynchronous motion of multiple sets of moving rings.

[0010] As a preferred embodiment of the present invention, the centers of the first cam, the second cam, and the third cam do not overlap with the center of the drive shaft. The moving ring has a chamfer on the side close to the first cam, the second cam, and the third cam, and the chamfer of each moving ring is in contact with a corresponding cam. The precise driving and smooth movement of the moving ring is achieved by the eccentric design of the cam, which generates a radial thrust when rotating. At the same time, the chamfer on the inner side of the moving ring forms a smooth contact with the cam profile surface, reducing friction and wear, and ensuring that the reciprocating motion of the moving ring is flexible and reliable.

[0011] As a preferred embodiment of the present invention, a liquid receiving frame is fixedly connected to the bottom end of the outer filter cylinder, and a liquid outlet pipe is fixedly connected to the right end of the liquid receiving frame. The liquid seeping out from the outer filter cylinder is received by the liquid receiving frame and discharged through the liquid outlet pipe, thereby realizing the collection and external transportation of the filtrate.

[0012] As a preferred embodiment of the present invention, the bottom end of the filter outer cylinder is provided with several sets of leakage holes, and the leakage holes are all located between any two sets of fixed rings. The top diameter of the leakage hole group is larger than its bottom diameter. Setting the leakage hole group between the fixed rings allows the filtrate to flow out nearby. At the same time, the upper-large and lower-small conical structure of the leakage hole group is conducive to liquid collection and prevents solid particles from clogging the pores.

[0013] As a preferred embodiment of the present invention, a discharge cone is fixedly connected to the right end of the filter outer cylinder. The discharge cone is located inside the discharge frame. A pressure regulating cylinder is fixedly connected to the top of the discharge frame. The dewatered filter cake is guided to the outlet through the discharge cone. At the same time, the pressure regulating cylinder is used as a power source to drive the subsequent adjustment of the slag discharge resistance.

[0014] In a preferred embodiment of the present invention, a track is fixedly connected inside the discharge rack, and a pressure regulating door is slidably connected inside the track. The output end of the pressure regulating cylinder is fixedly connected to the top of the pressure regulating door. The inner side of the pressure regulating door is in contact with the outer side of the discharge cone outlet. The pressure regulating door is driven to slide along the track by the pressure regulating cylinder, thereby changing the contact pressure between the pressure regulating door and the discharge cone outlet, thus adjusting the ease of filter cake discharge and realizing the control of the extrusion pressure in the filter chamber.

[0015] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. The stirring motor drives the stirring rod to rotate, which in turn drives the feeding auger at the bottom to rotate, achieving thorough mixing and forced conveying of chemical wastewater. At the same time, the transfer pipe connects the mixing cylinder to the drive housing, allowing the pre-treated wastewater to smoothly enter the filtration unit, reducing uneven mixing of chemicals and preventing pipe blockage. By bolting a protective cover to the inner wall of the drive housing and covering the outside of the transmission pulley and transmission belt, physical isolation of the high-speed rotating transmission components is achieved, which has the advantages of preventing foreign objects from being drawn in, protecting the safety of operators, and extending the service life of transmission components. 2. Several sets of fixed rings are fixed to the inner wall of the filter outer cylinder by fixing rods, and movable moving rings are set between adjacent fixed rings. The precise spacing between the fixed rings is maintained by elastic spacers, forming a filter unit with alternating layers of fixed and moving rings. It has a large filtration area, compact structure, and is easy to disassemble and maintain. The phase difference is formed by the sequential distribution of the first cam, the second cam, and the third cam on the surface of the drive shaft, so that the moving rings at different positions produce asynchronous reciprocating motion, which causes the volume of the filter chamber enclosed between adjacent fixed and moving rings to change periodically, realizing the alternating squeezing and release of the filter cake. By opening several sets of leakage holes at the bottom of the filter outer cylinder and setting the leakage holes between adjacent fixed rings, and designing the leakage holes as a conical structure with a top diameter larger than the bottom diameter, the filtrate can flow out of the filter chamber nearby and flow into the liquid receiving rack, and finally be discharged through the liquid outlet pipe, so as to ensure smooth drainage and prevent solid particles from clogging the pores.

[0016] 3. The pressure regulating gate is driven by the pressure regulating cylinder to slide along the track, so that the inner side of the pressure regulating gate is in contact with the outer side of the outlet of the discharge cone. The pressure of the pressure regulating cylinder is adjusted to change the tightness of the pressure regulating gate on the discharge port, thereby realizing precise control of the filter cake discharge resistance. It can adapt to different material characteristics and adjust the filter cake moisture content. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention; Figure 2 This is a schematic diagram of the overall second-view structure of the present invention; Figure 3 This is a schematic diagram of the mixing cylinder structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the drive housing of the present invention; Figure 5This is a schematic diagram of the internal structure of the filter outer cylinder and the discharge rack of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B.

[0019] Explanation of reference numerals in the attached figures: 1. Drive housing; 2. Filter outer cylinder; 3. Discharge rack; 4. Mixing cylinder; 5. Stirring motor; 6. Feed pipe; 7. Stirring rod; 8. Feeding auger; 9. Transfer pipe; 10. Drive motor; 11. Transmission pulley; 12. Driven pulley; 13. Transmission belt; 14. Protective cover; 15. Drive shaft; 16. Moving ring; 17. First cam; 18. Second cam; 19. Third cam; 20. Fixed ring; 21. Leakage hole assembly; 22. Liquid receiving rack; 23. Discharge pipe; 24. Elastic spacer sleeve; 25. Pressure regulating cylinder; 26. Discharge cone; 27. Pressure regulating gate; 28. Track; 29. ​​Fixing rod. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This invention provides, for example Figure 1-7The solid-liquid separation device for chemical wastewater treatment shown includes a drive housing 1. A filter outer cylinder 2 is fixedly connected to the rear end of the drive housing 1, and a discharge rack 3 is fixedly connected to the right end of the filter outer cylinder 2. A mixing cylinder 4 is fixedly connected to the top end of the drive housing 1. A feed pipe 6 is connected to the front flange of the mixing cylinder 4. A stirring motor 5 is fixedly connected to the top end of the mixing cylinder 4. A stirring rod 7 is fixedly connected to the output end of the stirring motor 5. A feeding auger 8 is fixedly connected to the bottom end of the stirring rod 7. A transfer pipe 9 is fixedly connected to the top wall of the drive housing 1 and communicates with the mixing cylinder 4. A drive motor 10 is installed on the front side of the drive housing 1. A transmission pulley 11 is fixedly connected to the output end of the drive motor 10. A transmission belt 13 is sleeved on the outer wall of the transmission pulley 11. A drive shaft 15 is wrapped around the end of the transmission belt 13 away from the transmission pulley 11. A driven pulley 12 is fixedly connected to the front end of the drive shaft 15 and is rotatably connected to the drive shaft 15. The inner wall of the outer casing 1 forms a three-section main body through the drive casing 1, the filter outer cylinder 2, and the discharge rack 3. The mixing cylinder 4 and its internal stirring motor 5, stirring rod 7, and feeding auger 8 are used to premix and transport the sewage. The inner wall of the drive casing 1 is bolted with a protective cover 14, which covers the drive pulley 11 and the drive belt 13. The end of the drive shaft 15 away from the drive belt 13 is rotatably connected to the inner wall of the filter outer cylinder 2, and the drive shaft 15 passes through the inner wall of the filter outer cylinder 2 and extends to the front of the discharge rack 3. The protective cover 14 covers the drive pulley 11 and the drive belt 13 to prevent foreign objects from being caught or personnel from accidentally touching them. At the same time, it ensures that the drive shaft 15 passes through and is rotatably connected to the filter outer cylinder 2 and the discharge rack 3, providing stable rotational support for the subsequent filtration unit. The stirring motor 5 drives the stirring rod 7 to rotate, which drives the feeding auger 8 at the bottom to rotate, realizing the full mixing and forced transport of chemical sewage. Meanwhile, the transfer pipe 9 connects the mixing cylinder 4 to the drive housing 1, allowing the pretreated wastewater to smoothly enter the filtration unit, reducing uneven mixing of chemicals and preventing pipe blockage. By bolting a protective cover 14 to the inner wall of the drive housing 1 and covering the outside of the transmission pulley 11 and the transmission belt 13, physical isolation of the high-speed rotating transmission components is achieved, which has the advantages of preventing foreign objects from being drawn in, protecting the safety of operators, and extending the service life of transmission components.

[0022] like Figure 1-7As shown, the inner wall of the filter outer cylinder 2 is provided with six sets of fixing rods 29, and both ends of the fixing rods 29 are fixedly connected to the inner wall of the filter outer cylinder 2. Several sets of fixed rings 20 are fixedly connected to the outer wall of the fixing rods 29. A moving ring 16 is provided between two sets of fixed rings 20. An elastic spacer sleeve 24 is installed between two sets of fixed rings 20 and is sleeved on the outer wall of the fixing rods 29. The fixing rods 29 fix the fixed rings 20 inside the filter outer cylinder 2. The elastic spacer sleeve 24 maintains the precise distance between adjacent fixed rings 20. The movable moving ring 16 is provided between the fixed rings 20 to provide a basis for subsequent extrusion filtration. Several sets of first cams 17, second cams 18 and third cams 19 are fixedly connected to the outer wall of the drive shaft 15. 17. The total number of the second cam 18 and the third cam 19 is the same as that of the moving ring 16. The first cam 17, the second cam 18, and the third cam 19 are sequentially distributed on the surface of the drive shaft 15, converting the rotational motion of the drive shaft 15 into the axial reciprocating motion of the moving ring 16. Through the first cam 17, the second cam 18, and the third cam 19 sequentially distributed along the axial direction, the corresponding moving rings 16 are driven respectively, realizing the asynchronous motion of multiple sets of moving rings 16. The centers of the first cam 17, the second cam 18, and the third cam 19 do not overlap with the center of the drive shaft 15. The moving ring 16 has a chamfer on the side close to the first cam 17, the second cam 18, and the third cam 19, and the chamfer of each moving ring 16 is in contact with a corresponding cam. The moving ring 16 has precise... Driven and smooth movement, the eccentric design of the cam generates radial thrust during rotation. Simultaneously, the chamfer on the inner side of the moving ring 16 forms a smooth contact with the cam profile surface, reducing friction and wear, ensuring flexible and reliable reciprocating motion of the moving ring 16. A liquid-receiving frame 22 is fixedly connected to the bottom end of the outer filter cylinder 2, and a liquid outlet pipe 23 is fixedly connected to the right end of the liquid-receiving frame 22. The liquid-receiving frame 22 collects the liquid seeping from the outer filter cylinder 2 and discharges it through the liquid outlet pipe 23, achieving the collection and external transport of the filtrate. Several sets of leakage hole groups 21 are opened at the bottom end of the outer filter cylinder 2, and each leakage hole group 21 is located between any two sets of fixed rings 20. The top diameter of each leakage hole group 21 is larger than its bottom diameter. Positioning the leakage hole groups 21 between the fixed rings 20 allows the filtrate to... The liquid flows out from the nearest outlet. The upper-larger, lower-smaller conical structure of the leakage hole group 21 facilitates liquid collection and prevents solid particles from clogging the channels. Several sets of fixed rings 20 are fixed to the inner wall of the filter outer cylinder 2 by fixing rods 29. Movable moving rings 16 are set between adjacent fixed rings 20. An elastic spacer sleeve 24 maintains the precise spacing between the fixed rings 20, forming a filter unit with alternating layers of fixed rings 20 and moving rings 16. This results in a large filtration area, compact structure, and convenient disassembly and maintenance. The phase difference created by the sequential distribution of the first cam 17, second cam 18, and third cam 19 on the surface of the drive shaft 15 causes asynchronous reciprocating motion of the moving rings 16 at different positions, resulting in a periodic change in the volume of the filter chamber enclosed between adjacent fixed rings 20 and moving rings 16.Alternating compression and release of the filter cake are achieved by opening several sets of leakage holes 21 at the bottom of the outer filter cylinder 2 and positioning these holes 21 between adjacent fixed rings 20. The leakage holes 21 are designed as conical structures with a top diameter larger than a bottom diameter. This allows the filtrate to flow out of the filter chamber nearby and collect in the liquid receiving rack 22, finally being discharged through the outlet pipe 23. This ensures smooth drainage and prevents solid particles from clogging the channels.

[0023] like Figure 1-7 As shown, a discharge cone 26 is fixedly connected to the right end of the outer filter cylinder 2. The discharge cone 26 is located inside the discharge rack 3. A pressure regulating cylinder 25 is fixedly connected to the top of the discharge rack 3. The dewatered filter cake is guided to the outlet through the discharge cone 26. At the same time, the pressure regulating cylinder 25 is used as a power source to drive the subsequent adjustment of the slag discharge resistance. A track 28 is fixedly connected inside the discharge rack 3. A pressure regulating gate 27 is slidably connected inside the track 28. The output end of the pressure regulating cylinder 25 is fixedly connected to the top of the pressure regulating gate 27. The inner side of the pressure regulating gate 27 is in contact with the outer side of the outlet of the discharge cone 26. The pressure regulating cylinder 25 drives the pressure regulating gate 27 to slide along the track 28, changing the contact pressure between the pressure regulating gate 27 and the outlet of the discharge cone tube 26, thereby adjusting the ease of filter cake discharge and controlling the extrusion pressure in the filtration chamber. The pressure regulating cylinder 25 drives the pressure regulating gate 27 to slide along the track 28, so that the inner side of the pressure regulating gate 27 is in contact with the outer side of the outlet of the discharge cone tube 26. The pressure regulating cylinder 25 adjusts the pressure of the pressure regulating gate 27 on the discharge port, thereby achieving precise control of the filter cake discharge resistance. This can adapt to different material characteristics and adjust the filter cake moisture content.

[0024] Working principle like Figure 1-7 As shown, chemical wastewater first enters the mixing drum 4 through the feed pipe 6. A stirring motor 5 is installed at the top of the mixing drum 4, which drives the stirring rod 7 to rotate after starting. A feeding auger 8 is fixedly connected to the bottom of the stirring rod 7, and the two rotate synchronously. The stirring rod 7 thoroughly stirs the wastewater entering the mixing drum 4, ensuring that suspended particles in the wastewater are evenly mixed with any added chemicals, promoting the flocculation of small particles and creating conditions for subsequent filtration. Simultaneously, the feeding auger 8 generates a downward pushing force during rotation, continuously pushing the mixed wastewater into the transfer pipe 9, and then conveying it to the drive housing 1 through the transfer pipe 9. The advantage of this structure is that stirring and conveying are driven by the same power source, resulting in a compact structure. Furthermore, the forced conveying action of the feeding auger 8 effectively prevents viscous materials from accumulating and clogging at the inlet, ensuring continuous and stable feeding.

[0025] After the wastewater enters the drive housing 1, it flows towards the filter outer cylinder 2. At this time, the drive motor 10 has started running, and its output pulley 11 drives the driven pulley 12 to rotate through the drive belt 13. The driven pulley 12 is fixedly connected to the front end of the drive shaft 15, thereby transmitting power to the drive shaft 15. The drive shaft 15 runs through the entire filter outer cylinder 2, and its end extends to the front side of the discharge rack 3, and is rotatably supported on the inner wall of the filter outer cylinder 2. The inner wall of the drive housing 1 is also bolted with a protective cover 14, which covers the drive pulley 11 and the drive belt 13, providing safety protection, preventing foreign objects from being drawn in, and preventing personnel from accidentally touching the operating parts.

[0026] The filter outer cylinder 2 has multiple fixed rods 29 inside, with both ends of the fixed rods 29 fixedly connected to the inner sidewall of the filter outer cylinder 2, forming a stable support frame. Several sets of fixed rings 20 are fitted onto the fixed rods 29, and the positions of the fixed rings 20 are relatively fixed. A movable ring 16 is provided between adjacent fixed rings 20, and the movable ring 16 can move freely along the axial direction. To maintain precise consistency in the spacing between adjacent fixed rings 20, an elastic spacer sleeve 24 is also fitted between every two sets of fixed rings 20. This spacer sleeve is also fitted onto the fixed rods 29, serving a positioning and support function. Through the above structure, the fixed rings 20 and movable rings 16 are alternately stacked to form a multi-stage filtration chamber.

[0027] The reciprocating motion of the moving ring 16 is driven by a cam mechanism on the drive shaft 15. Several sets of first cams 17, second cams 18, and third cams 19 are fixedly connected to the outer wall of the drive shaft 15. The total number of these three types of cams is the same as the number of moving rings 16, and they are distributed sequentially on the surface of the drive shaft 15 in the order of first, second, and third. The center of each cam does not overlap with the center of the drive shaft 15, meaning the cams are eccentrically positioned. A chamfer is provided on the side of the moving ring 16 closest to the cam, and the chamfer of each moving ring 16 contacts the corresponding cam profile surface.

[0028] When the drive shaft 15 rotates, due to the eccentric structure of the cam, its profile surface generates radial reciprocating oscillation during rotation, and transmits the thrust to the chamfer of the moving ring 16 through the contact surface. Since the first cam 17, the second cam 18, and the third cam 19 are sequentially distributed in the axial direction and have a phase difference, they drive their respective corresponding moving rings 16 to produce asynchronous axial reciprocating motion. Specifically, at a certain moment, the moving ring 16 corresponding to the first cam 17 is pushed towards the adjacent fixed ring 20, causing the filter chamber volume at that point to shrink; at the same time, the moving ring 16 corresponding to the second cam 18 may be in the return phase, and the chamber volume recovers; while the moving ring 16 corresponding to the third cam 19 is in a transition state. This asynchronous motion forms a peristaltic wave-like motion as a whole, propagating axially from the feed end to the discharge end.

[0029] The reciprocating motion of the moving ring 16 has two key effects. First, as the moving ring 16 approaches the fixed ring 20, the volume of the filter chamber decreases sharply, applying mechanical pressure to the filter cake trapped inside the chamber and squeezing out the capillary water inside the filter cake particles, thus achieving deep dewatering. Second, due to the axial phase difference in the motion of the moving ring 16, this wave-like peristalsis generates a continuous axial thrust on the filter cake, causing the filter cake to gradually move from the feed end to the discharge end.

[0030] The squeezed-out filtrate flows out of the filtration chamber and is discharged through the leakage hole group 21 at the bottom of the outer filter cylinder 2. The leakage hole group 21 is positioned between two adjacent sets of fixed rings 20 to ensure that the filtrate can flow out nearby and avoid accumulation inside the filtration unit. The top diameter of each leakage hole group 21 is larger than the bottom diameter, forming a conical structure that is wider at the top and narrower at the bottom. This design facilitates rapid liquid collection and inflow, while the conical slope prevents solid particles from getting stuck in the channels and causing blockage. All the filtrate flowing out from each leakage hole group 21 is collected in the liquid receiving rack 22 at the bottom of the outer filter cylinder 2, and finally discharged through the liquid outlet pipe 23 to enter the subsequent processing steps.

[0031] As the rotating ring 16 continues to push the filter cake through the peristaltic motion, the dehydrated filter cake gradually moves to the right end of the outer filter cylinder 2 and enters the discharge cone 26. The discharge cone 26 is located inside the discharge rack 3, and a pressure regulating gate 27 is installed at its outlet. The pressure regulating gate 27 is slidably connected to the track 28 inside the discharge rack 3 and can only move up and down. The top of the pressure regulating gate 27 is fixedly connected to the output end of the pressure regulating cylinder 25, which is installed at the top of the discharge rack 3. In the initial state, the inner side of the pressure regulating gate 27 is in contact with the outer side of the outlet of the discharge cone 26, forming a certain sealing pressure on the slag discharge port.

[0032] The function of the pressure regulating gate 27 is to adjust the resistance of the filter cake discharge, thereby controlling the compression intensity within the filtration chamber. When the pressure regulating cylinder 25 drives the pressure regulating gate 27 downward to press it tighter, the opening resistance of the discharge port increases, and the filter cake needs to accumulate greater thrust to push the pressure regulating gate 27 open. This process further compresses and dehydrates the filter cake at the front end of the discharge port, resulting in a lower moisture content in the final discharged filter cake. When the pressure regulating cylinder 25 drives the pressure regulating gate 27 upward to release it, the resistance at the discharge port decreases, the filter cake discharges more smoothly, and the processing capacity increases accordingly. By adjusting the output pressure of the pressure regulating cylinder 25, the final moisture content of the filter cake can be flexibly controlled according to the characteristics of different types of chemical wastewater.

[0033] In summary, the workflow of this invention can be summarized as follows: Wastewater enters the mixing drum 4 through the feed pipe 6, where the stirring rod 7 and the feeding auger 8, driven by the stirring motor 5, complete the mixing and conveying; the drive motor 10 drives the drive shaft 15 to rotate via belt transmission; the eccentric cam on the drive shaft 15 drives the moving ring 16 to generate asynchronous reciprocating motion, causing the volume of the filtration chamber to change periodically, while simultaneously applying extrusion pressure to the filter cake and generating an axial pushing effect; the filtrate flows out from the leakage hole group 21, and is discharged through the liquid receiving rack 22 and the liquid outlet pipe 23; the filter cake is pushed to the discharge cone pipe 26 and discharged outside the machine under the resistance control of the pressure regulating gate 27. Throughout the entire process, the feeding, filtering, extrusion, conveying, and slag discharge stages are carried out continuously, realizing continuous solid-liquid separation and deep dewatering of chemical wastewater.

[0034] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A solid-liquid separation device for chemical wastewater treatment, comprising a drive housing (1), characterized in that: The rear end of the drive housing (1) is fixedly connected to a filter outer cylinder (2), the right end of the filter outer cylinder (2) is fixedly connected to a discharge rack (3), the top end of the drive housing (1) is fixedly connected to a mixing cylinder (4), the front flange of the mixing cylinder (4) is connected to a feed pipe (6), the top end of the mixing cylinder (4) is fixedly connected to a stirring motor (5), the output end of the stirring motor (5) is fixedly connected to a stirring rod (7), the bottom end of the stirring rod (7) is fixedly connected to a feeding auger (8), and the top wall of the drive housing (1) is fixedly connected to a rotating... The transfer tube (9) is connected to the mixing cylinder (4). A drive motor (10) is installed on the front side of the drive housing (1). A transmission pulley (11) is fixedly connected to the output end of the drive motor (10). A transmission belt (13) is sleeved on the outer side wall of the transmission pulley (11). A drive shaft (15) is wrapped around the end of the transmission belt (13) away from the transmission pulley (11). A driven pulley (12) is fixedly connected to the front end of the drive shaft (15). The driven pulley (12) is rotatably connected to the inner side wall of the drive housing (1).

2. The solid-liquid separation device for chemical wastewater treatment according to claim 1, characterized in that: The inner wall of the drive housing (1) is bolted with a protective cover (14), which covers the drive pulley (11) and the drive belt (13). The end of the drive shaft (15) away from the drive belt (13) is rotatably connected to the inner wall of the filter outer cylinder (2), and the drive shaft (15) passes through the inner wall of the filter outer cylinder (2) and extends to the front of the discharge rack (3).

3. The solid-liquid separation device for chemical wastewater treatment according to claim 1, characterized in that: The inner wall of the filter outer cylinder (2) is provided with six sets of fixing rods (29), and both ends of the fixing rods (29) are fixedly connected to the inner wall of the filter outer cylinder (2). The outer wall of the fixing rods (29) is fixedly connected with several sets of fixed rings (20). A moving ring (16) is provided between two sets of fixed rings (20). An elastic spacer sleeve (24) is installed between two sets of fixed rings (20) and the elastic spacer sleeve (24) is sleeved on the outer wall of the fixing rods (29).

4. The solid-liquid separation device for chemical wastewater treatment according to claim 1, characterized in that: Several sets of first cams (17), second cams (18) and third cams (19) are fixedly connected to the outer wall of the drive shaft (15). The total number of first cams (17), second cams (18) and third cams (19) is the same as that of the moving ring (16). The first cams (17), second cams (18) and third cams (19) are distributed sequentially on the surface of the drive shaft (15) in this order.

5. A solid-liquid separation device for chemical wastewater treatment according to claim 4, characterized in that: The center of the first cam (17), the second cam (18) and the third cam (19) do not overlap with the center of the drive shaft (15). The moving ring (16) has a chamfer on the side close to the first cam (17), the second cam (18) and the third cam (19), and the chamfer of each moving ring (16) is in contact with a corresponding cam.

6. A solid-liquid separation device for chemical wastewater treatment according to claim 1, characterized in that: The bottom end of the filter outer cylinder (2) is fixedly connected to a liquid receiving rack (22), and the right end of the liquid receiving rack (22) is fixedly connected to a liquid outlet pipe (23).

7. A solid-liquid separation device for chemical wastewater treatment according to claim 1, characterized in that: The bottom end of the filter outer cylinder (2) is provided with several sets of leakage hole groups (21), and the leakage hole groups (21) are all located between any two sets of fixed rings (20). The top diameter of the leakage hole group (21) is larger than its bottom diameter.

8. A solid-liquid separation device for chemical wastewater treatment according to claim 1, characterized in that: The right end of the filter outer cylinder (2) is fixedly connected to a discharge cone tube (26), which is located inside the discharge frame (3). The top of the discharge frame (3) is fixedly connected to a pressure regulating cylinder (25).

9. A solid-liquid separation device for chemical wastewater treatment according to claim 8, characterized in that: The discharge rack (3) is fixedly connected to a track (28), and a pressure regulating door (27) is slidably connected inside the track (28). The output end of the pressure regulating cylinder (25) is fixedly connected to the top of the pressure regulating door (27), and the inner side of the pressure regulating door (27) is in contact with the outer side of the outlet of the discharge cone (26).

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