A device and method for treating spent caustic

Abstract

This invention relates to the field of waste alkali liquid treatment technology, specifically to a waste alkali liquid treatment device and method, including a waste liquid tank and a baffle plate, the baffle plate being fixedly connected to the inner wall of the waste liquid tank, and also including a separation tank, a pressure plate, a scraper, a rotary drive assembly, a squeezing and draining assembly, and a reciprocating scraping assembly. The separation tank is rotatably installed in the waste liquid tank via the rotary drive assembly. In order to facilitate the extrusion of water contained in suspended solids, this invention achieves uniform distribution of suspended solids by rotating the separation tank at low speed while scraping, followed by a triple separation mode of initial separation through drainage holes, secondary dehydration by centrifugal force, and deep dehydration by pressure plate extrusion, which greatly improves the solid-liquid separation effect. Furthermore, a quantitative scraping design is adopted to avoid the scraper from spinning idly and causing ineffective wear on the equipment. At the same time, the separation and engagement of the toothed ring during the lifting and lowering of the pressure plate achieves precise linkage and disconnection between the rotary drive assembly and the reciprocating scraping assembly, which can prevent the scraper from accidentally scraping out suspended solids during the dehydration stage.

Description

Technical Field

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

[0002] Waste alkaline liquid is a highly alkaline waste liquid generated during industrial production processes such as petrochemicals, papermaking, and printing and dyeing. It is typically characterized by high pH value, high concentration of organic matter, and the presence of sulfides, oils, and salts. Direct discharge will severely disrupt the acid-base balance of water bodies, pollute the environment, and harm organisms. Therefore, it requires specialized treatment to ensure that the water quality meets discharge standards or reuse requirements. The treatment equipment and methods for waste alkaline liquid fall under the category of environmental protection technologies for water pollution prevention and control.

[0003] Flotation is one of the steps in the treatment of waste alkaline solutions. It utilizes microbubbles as a carrier, introducing or generating a large number of microbubbles into the water, causing them to adhere and bind with hydrophobic suspended solids, oil droplets, mineral particles, and other pollutants in the water. This forms an air-flotation complex with a density less than water, which quickly floats to the surface to form scum. The scum is then separated and removed by a scraper. This is a solid-liquid or liquid-liquid separation technology.

[0004] However, most existing waste alkali liquid treatment devices have significant shortcomings: First, they are not convenient for removing water from suspended solids, resulting in excessively high water content in the scraped scum. This necessitates the addition of dewatering equipment, which not only increases equipment investment costs but also prolongs the treatment process and increases operating energy consumption, leading to excessive overall treatment costs. Second, they are not convenient for controlling the scraping rate. When the amount of scum produced is small or intermittent, the scraping device is prone to idling, which wastes electricity, accelerates equipment wear, and shortens the device's service life. At the same time, the scum cannot be effectively separated during idling, which may cause the scum to accumulate and fall back into the waste liquid, affecting the treatment effect. They are also difficult to adapt to the actual working conditions where the suspended solids content in waste alkali liquid fluctuates greatly. Summary of the Invention

[0005] The purpose of this invention is to provide a waste alkali solution treatment device and method, which facilitates the extrusion of water contained in suspended solids to reduce subsequent treatment costs, and controls the flotation rate to improve stability.

[0006] To achieve this objective, the present invention adopts the following technical solution: A waste alkali liquid treatment device is provided, including a waste liquid tank and a baffle plate. The baffle plate is fixedly connected to the inner wall of the waste liquid tank. The device also includes a separation tank, a pressure plate, a scraper, a rotary drive assembly, a squeezing and draining assembly, and a reciprocating scraping assembly. The separation tank is rotatably installed in the waste liquid tank via the rotary drive assembly. The bottom wall of the separation tank has multiple drainage holes. The pressure plate is vertically slidably installed in the waste liquid tank via the squeezing and draining assembly. The scraper is used to push suspended solids into the separation tank. The pressure plate is in contact with the inner wall of the separation tank. The scraper is horizontally slidably installed in the waste liquid tank via the reciprocating scraping assembly. One end of the scraper has an inclined structure, and the other end of the scraper is in contact with the baffle plate. The top of the scraper is higher than the top of the baffle plate.

[0007] Preferably, the rotary drive assembly includes a rotating column, a frame, a base, a motor, and a pair of spur gears. The frame is fixedly connected to the top of the waste liquid tank, the base is fixedly connected to the bottom wall of the waste liquid tank, the bottom of the rotating column is rotatably connected to the base, the top of the rotating column passes through the frame and is rotatably connected to it, the bottom of the motor is fixedly connected to the frame, the output shaft of the motor passes through the frame and is coaxially connected to one of the spur gears, the other spur gear is coaxially connected to the rotating column, the two spur gears mesh with each other, and the rotating column passes through the separation tank and is coaxially connected to it.

[0008] Preferably, the rotating column is a hollow tubular structure, the pressure plate is slidably connected to the outer periphery of the rotating column, the squeezing and draining assembly includes a slider and a hydraulic rod, the protrusions at both ends of the slider pass through the side wall of the rotating column and are fixedly connected to the inner wall of the pressure plate, the hydraulic rod is fixedly connected to the top of the frame, the telescopic end of the hydraulic rod passes through the rotating column and is rotatably connected to the slider, and the side wall of the rotating column is provided with a long groove for the slider to slide.

[0009] Preferably, the squeeze drainage assembly further includes a top plate, a tension spring, a pair of racks, and a transmission gear. The top plate is slidably connected to the outer periphery of the rotating column. Multiple plugs are fixedly connected to the top of the top plate, and the plugs are inserted into the drainage holes. The diameter of the plugs is smaller than the diameter of the drainage holes. The bottom of the top plate is inserted into the base and slidably connected to it. The tension spring is sleeved on the outer periphery of the bottom of the top plate. One end of the tension spring is rotatably connected to the top plate, and the other end of the tension spring is fixedly connected to the base. The inner wall of the top plate passes through a long groove and is fixedly connected to one of the racks. The other rack is fixedly connected to the bottom of the slider. The transmission gear is rotatably connected to the inner wall of the rotating column, and the two racks mesh with the two sides of the transmission gear respectively.

[0010] Preferably, the reciprocating scraper assembly includes a pair of slide rails, a pair of slide blocks, and a guide plate. The bottom of the slide rails is fixedly connected to the waste liquid pool, the bottom of the slide blocks is slidably connected to the slide rails, the two sides of the scraper are fixedly connected to the two slide blocks respectively, and the guide plate is fixedly connected to one of the slide blocks.

[0011] Preferably, the reciprocating scraping assembly further includes a pair of fixed frames, a drive rod, a rotating shaft, and a pair of first pulleys. The fixed frames are fixedly connected to the waste liquid tank. The drive rod is rotatably connected to the top of one of the fixed frames. One end of the drive rod passes through one of the first pulleys and is coaxially connected to it. The rotating shaft is rotatably connected to the top of the other fixed frame. The rotating shaft passes through the other first pulley and is coaxially connected to it. The two first pulleys are driven by a belt. A through guide groove is provided on the top of the guide plate. The other end of the drive rod passes through the guide groove and is slidably connected to it.

[0012] Preferably, the reciprocating scraper assembly further includes a sleeve and a pair of toothed rings. The sleeve is fitted around the outer periphery of the rotating shaft and slidably connected thereto. One toothed ring is coaxially connected to the top of the rotating shaft, and the other toothed ring is coaxially connected to the bottom wall of the sleeve. The teeth on the two toothed rings are arranged opposite each other and interlock.

[0013] Preferably, the reciprocating scraper assembly further includes a support plate, a pair of second pulleys, and a spring. The support plate is slidably connected to the periphery of the rotating column, one end of the support plate is slidably connected to the frame, and the other end of the support plate is rotatably connected to the sleeve. One of the second pulleys is coaxially connected to the rotating column, and the other second pulley is coaxially connected to the sleeve. The second pulleys on the periphery of the rotating column are rotatably connected to the top of the support plate. The two second pulleys are driven by a belt. The spring is sleeved on the periphery of the rotating column, one end of the spring abuts against the top of the pressure plate, and the other end of the spring is fixedly connected to the bottom of the support plate.

[0014] Preferably, it also includes a feeding hopper, one end of which is attached to and fixedly connected to the top of the partition, and the other end of which is attached to and connected to the top of the separation tank. The feeding hopper and the scraper are located at opposite ends of the partition. A water inlet pipe is fixedly connected to the top of one end of the waste liquid tank, and a drain pipe is connected to the bottom of the other end of the waste liquid tank. An aeration pipe is fixedly connected to the bottom of the waste liquid tank.

[0015] This invention also provides a method for treating waste alkali liquid using a waste alkali liquid treatment device, comprising the following steps: Step 1: Injecting waste alkali liquid into a waste liquid tank through an inlet pipe and injecting gas into the waste liquid tank through an aeration pipe, causing impurities in the waste alkali liquid to form suspended solids; Step 2: Using a set rotary drive component, causing the separation tank to rotate one revolution, and simultaneously, through the linkage between the rotary drive component and the reciprocating scraping component, driving the scraper to move horizontally reciprocally once, pushing a fixed amount of suspended solids from the top of the partition into the separation tank and distributing it evenly, with the water in the suspended solids being initially separated through the drain hole; Step 3: Using a set squeeze drainage component... Step 4: The rotary drive component continues to drive the separation tank and the pressure plate to rotate at high speed. Centrifugal force is used to quickly separate impurities and water in the suspended matter. After rotation stops, the water is discharged through the drain hole, achieving secondary separation. Step 5: The squeezing and draining component continues to push the pressure plate down, squeezing out the water in the impurities again through the downward pressure and draining it through the drain pipe, improving the separation effect. At the same time, the top plate is pushed up to insert the plug into the drain hole to prevent impurities from being squeezed out.

[0016] The beneficial effects of this invention are: 1. This invention avoids ineffective wear on the equipment caused by the scraper spinning idly through a quantitative scraping design. At the same time, by utilizing the separation and engagement of the toothed ring during the lifting and lowering of the pressure plate, the rotary drive component and the reciprocating scraping component are precisely linked and disconnected, which can prevent the scraper from malfunctioning and scraping out suspended matter during the dehydration stage and reduce component friction.

[0017] 2. This invention achieves uniform distribution of suspended solids by scraping the material while the separation tank rotates at low speed. The solids are then separated through a triple separation process: initial separation through the drain hole, secondary dehydration by centrifugal force, and deep dehydration by the pressure plate. This significantly improves the solid-liquid separation effect. At the same time, the gap design between the plug and the drain hole prevents impurities from overflowing while ensuring normal water discharge. This effectively avoids impurity blockage and ensures a stable and efficient processing process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 .

[0022] Figure 4 This is a cross-sectional view of the waste liquid tank structure of the present invention.

[0023] Figure 5 This is a structural exploded view of the extrusion and drainage component of the present invention.

[0024] Figure 6 This is a cross-sectional view of the base structure of the present invention.

[0025] Figure 7 This is a cross-sectional view of the separation bucket structure of the present invention.

[0026] Figure 8 This is a cross-sectional view of the rotating column structure of the present invention.

[0027] Figure 9 yes Figure 8 Enlarged view of the structure at point A in the middle.

[0028] Figure 10 This is a structural exploded view of the rotary drive component of the present invention.

[0029] Figure 11 This is a structural breakdown of the reciprocating scraper assembly of the present invention. Figure 1 .

[0030] Figure 12 This is a structural breakdown of the reciprocating scraper assembly of the present invention. Figure 2 .

[0031] Figure 13 yes Figure 2 Enlarged view of the structure at point A in the middle.

[0032] In the picture: 1. Waste liquid tank; 10. Baffle plate; 11. Separation tank; 110. Drain hole; 12. Pressure plate; 13. Scraper; 14. Feed hopper; 15. Water inlet pipe; 16. Drain pipe; 17. Aeration pipe; 2. Rotary drive assembly; 20. Rotating column; 200. Long slot; 21. Frame; 22. Base; 23. Motor; 24. Spur gear; 3. Extrusion drainage assembly; 30. Slider; 31. Hydraulic rod; 32. Top plate; 320. Plug; 33. Tension spring; 34. Rack; 35. Transmission gear; 4. Reciprocating scraper assembly; 40. Slide rail; 400. Slide block; 41. Guide plate; 410. Guide groove; 42. Fixing frame; 43. Drive rod; 44. Rotating shaft; 440. First pulley; 45. Sleeve; 450. Second pulley; 46. Gear ring; 47. Support plate; 48. Spring. Detailed Implementation

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figures 1 to 13 As shown: A waste alkali liquid treatment device and method includes a waste liquid tank 1 and a partition 10. The partition 10 is fixedly connected to the inner wall of the waste liquid tank 1. The device also includes a separation tank 11, a pressure plate 12, a scraper 13, a rotary drive assembly 2, a squeezing and draining assembly 3, and a reciprocating scraping assembly 4. The separation tank 11 is rotatably installed in the waste liquid tank 1 via the rotary drive assembly 2. The bottom wall of the separation tank 11 has multiple drainage holes 110. The pressure plate 12 is vertically slidably installed in the waste liquid tank 1 via the squeezing and draining assembly 3. The scraper 13 is used to push suspended solids into the separation tank 11. The pressure plate 12 is in contact with the inner wall of the separation tank 11. The scraper 13 is horizontally slidably installed in the waste liquid tank 1 via the reciprocating scraping assembly 4. One end of the scraper 13 has an inclined structure, and the other end of the scraper 13 is in contact with the partition 10. The top of the scraper 13 is higher than the top of the partition 10.

[0038] During the flotation treatment of waste alkali solution, the waste alkali solution is injected from one end of the waste liquid tank 1 and aerated. Impurities and air bubbles in the waste alkali solution form suspended matter that floats on the water surface. As the water level gradually rises to the top of the baffle 10, the rotary drive component 2 is activated, driving the separation tank 11 to rotate one revolution. Simultaneously, through the linkage between the rotary drive component 2 and the reciprocating scraper component 4, the scraper 13 is driven to slide back and forth once. When the scraper 13 moves away from the baffle 10, the suspended matter is lifted by the inclined structure at one end of the scraper 13, submerging the scraper 13 before falling back down. When the scraper 13 moves in the opposite direction to reset, since the top of the scraper 13 is higher than the top of the baffle 10, it can push the suspended matter over the baffle 10 and into the separation tank 11. During this process, the scraper 13 pushes a certain amount of suspended matter on the water surface to overflow from the top of the baffle 10 and flow into the rotating separation tank 11, so that the suspended matter is evenly distributed in the separation tank 11. Preliminary separation is achieved through multiple drainage holes 110, and the water carried out by the scraper 13 is quickly discharged. At the same time, quantitative scraping avoids idling and extends the service life of the device.

[0039] Next, the squeezing and draining assembly 3 is activated, pushing the pressure plate 12 down into the separation tank 11. The rotation drive assembly 2 and the reciprocating scraping assembly 4 are simultaneously disconnected. This causes the separation tank 11 to rotate rapidly, performing secondary separation through centrifugal force, quickly separating the water in the suspended solids from the impurities. When the separation tank 11 stops rotating, the water flows out through the drain hole 110. Subsequently, the squeezing and draining assembly 3 pushes the pressure plate 12 down further, using squeezing force to fully expel the water from the impurities for further separation, further improving the separation effect. Simultaneously, the top plate 32 rises, inserting the plug 320 into the drain hole 110 to prevent impurities from being squeezed out of the hole.

[0040] like Figures 5 to 10 As shown: To drive the separation tank 11 to rotate, achieve uniform distribution of suspended solids, and simultaneously dehydrate quickly, the rotary drive assembly 2 includes a rotating column 20, a frame 21, a base 22, a motor 23, and a pair of spur gears 24. The frame 21 is fixedly connected to the top of the waste liquid tank 1, the base 22 is fixedly connected to the bottom wall of the waste liquid tank 1, the bottom of the rotating column 20 is rotatably connected to the base 22, and the top of the rotating column 20 passes through and is rotatably connected to the frame 21. The bottom of the motor 23 is fixedly connected to the frame 21, and the output shaft of the motor 23 passes through the frame 21 and is coaxially connected to one of the spur gears 24. The other spur gear 24 is coaxially connected to the rotating column 20, and the two spur gears 24 mesh with each other. The rotating column 20 passes through and is coaxially connected to the separation tank 11.

[0041] The motor 23 rotates, and its output shaft drives one of the spur gears 24 to rotate. Through the meshing transmission between the two spur gears 24, the rotating column 20 rotates, and the rotating column 20 simultaneously drives the separation barrel 11 to rotate. By adjusting the speed of the motor 23, the rotation speed of the separation barrel 11 can also be controlled. When the scraper 13 scrapes the material, the separation barrel 11 rotates at a low speed to achieve uniform distribution of suspended matter. After scraping is completed, the separation barrel 11 rotates at a high speed for dehydration.

[0042] like Figures 1 to 10 As shown: The rotating column 20 is a hollow tubular structure. The pressure plate 12 is slidably connected to the outer periphery of the rotating column 20. The squeezing and draining assembly 3 includes a slider 30 and a hydraulic rod 31. The protrusions at both ends of the slider 30 pass through the side wall of the rotating column 20 and are fixedly connected to the inner wall of the pressure plate 12. The hydraulic rod 31 is fixedly connected to the top of the frame 21. The telescopic end of the hydraulic rod 31 passes through the rotating column 20 and is rotatably connected to the slider 30. The side wall of the rotating column 20 is provided with a long groove 200 for the slider 30 to slide.

[0043] The squeezing and draining assembly 3 also includes a top plate 32, a tension spring 33, a pair of racks 34, and a transmission gear 35. The top plate 32 is slidably connected to the outer periphery of the rotating column 20. Multiple plugs 320 are fixedly connected to the top of the top plate 32. The plugs 320 are inserted into the drain holes 110 and their diameters are smaller than the diameters of the drain holes 110. The bottom of the top plate 32 is inserted into the base 22 and slidably connected to it. The tension spring 33 is sleeved on the outer periphery of the bottom of the top plate 32. One end of the tension spring 33 is rotatably connected to the top plate 32, and the other end of the tension spring 33 is fixedly connected to the base 22. The inner wall of the top plate 32 passes through the long groove 200 and is fixedly connected to one of the racks 34. The other rack 34 is fixedly connected to the bottom of the slider 30. The transmission gear 35 is rotatably connected to the inner wall of the rotating column 20. The two racks 34 mesh with the two sides of the transmission gear 35 respectively.

[0044] The hydraulic rod 31 is activated, pushing the slider 30 to slide up and down along the long groove 200. This causes the pressure plate 12 to rise and fall along the rotating column 20. When the rotating column 20 rotates, the pressure plate 12 rotates synchronously with the separating barrel 11 through the contact between the long groove 200 and the rotating block, preventing excessive wear. When the pressure plate 12 descends to enter the separating barrel 11 and is located at its top, the rack 34 on the slider 30 contacts the transmission gear 35. At this time, the top plate 32 is located below the separating barrel 11 and separated from the drain hole 110, allowing the water after secondary dehydration to be quickly discharged through the drain hole 110. As the pressure plate 12 continues to descend and squeeze out impurities, the slider 30 and rack 34 descend. Through the meshing of the two racks 34 with the transmission gear 35, the racks 34 on the top plate 32 slide upward. At the same time, the tension spring 33 is stretched, and the top plate 32 moves upward, inserting the plug 320 into the drain hole 110, thereby preventing impurities from being squeezed out of the drain hole 110. Since the diameter of the plug 320 is smaller than the diameter of the drain hole 110, water can be discharged normally and slowly through the gap between them. After squeezing is completed, the pressure plate 12 rises and resets, and the racks 34 on the slider 30 separate from the transmission gear 35. At this time, the top plate 32 falls and resets under the combined action of the thrust of the transmission gear 35 and the rebound force of the tension spring 33. The bottom of the top plate 32 abuts against the bottom wall of the base 22, so that the racks 34 on the top plate 32 always remain meshed with the transmission gear 35.

[0045] like Figures 1 to 13 As shown: The reciprocating scraper assembly 4 includes a pair of slide rails 40, a pair of slide blocks 400, and a guide plate 41. The bottom of the slide rails 40 is fixedly connected to the waste liquid tank 1, the bottom of the slide blocks 400 is slidably connected to the slide rails 40, the two sides of the scraper 13 are fixedly connected to the two slide blocks 400 respectively, and the guide plate 41 is fixedly connected to one of the slide blocks 400.

[0046] The reciprocating scraping assembly 4 also includes a pair of fixed frames 42, a drive rod 43, a rotating shaft 44, and a pair of first pulleys 440. The fixed frames 42 are fixedly connected to the waste liquid tank 1. The drive rod 43 is rotatably connected to the top of one of the fixed frames 42. One end of the drive rod 43 passes through one of the first pulleys 440 and is coaxially connected to it. The rotating shaft 44 is rotatably connected to the top of the other fixed frame 42. The rotating shaft 44 passes through the other first pulley 440 and is coaxially connected to it. The two first pulleys 440 are driven by a belt. The top of the guide plate 41 is provided with a through guide groove 410. The other end of the drive rod 43 passes through the guide groove 410 and is slidably connected to it.

[0047] The reciprocating scraper assembly 4 also includes a sleeve 45 and a pair of toothed rings 46. The sleeve 45 is sleeved around the rotating shaft 44 and slidably connected thereto. One toothed ring 46 is coaxially connected to the top of the rotating shaft 44, and the other toothed ring 46 is coaxially connected to the bottom wall of the sleeve 45. The teeth on the two toothed rings 46 are arranged opposite each other and mesh with each other.

[0048] The reciprocating scraper assembly 4 also includes a support plate 47, a pair of second pulleys 450, and a spring 48. The support plate 47 is slidably connected to the periphery of the rotating column 20. One end of the support plate 47 is slidably connected to the frame 21, and the other end of the support plate 47 is rotatably connected to the sleeve 45. One of the second pulleys 450 is coaxially connected to the rotating column 20, and the other second pulley 450 is coaxially connected to the sleeve 45. The second pulley 450 on the periphery of the rotating column 20 is rotatably connected to the top of the support plate 47. The two second pulleys 450 are driven by a belt. The spring 48 is sleeved on the periphery of the rotating column 20. One end of the spring 48 abuts against the top of the pressure plate 12, and the other end of the spring 48 is fixedly connected to the bottom of the support plate 47.

[0049] When the pressure plate 12 rises, the support plate 47 remains in the same position initially. Then, the pressure plate 12 contacts the spring 48, which provides a damping effect. The support plate 47 rises simultaneously with the pressure plate 12, causing the sleeve 45 to slide upwards along the rotating shaft 44. This allows the toothed ring 46 on the bottom wall of the sleeve 45 to mesh with the toothed ring 46 on the top of the rotating shaft 44, achieving meshing transmission between the two and enabling the rotary drive assembly 2 and the reciprocating scraper assembly 4 to work together. At this time, the rotation of the rotating column 20 drives one of the second pulleys 450 to rotate. Through the belt drive between the two second pulleys 450, the sleeve 45 and the rotating shaft 44 rotate synchronously, driving one of the first pulleys 440 to rotate. Through the belt drive between the two first pulleys 440, the drive rod 43 rotates on the fixed frame 42. When the drive rod 43 rotates one revolution, one end of it slides back and forth once in the guide groove 410. Through the contact between the drive rod 43 and the inner wall of the guide groove 410, the guide plate 41 is pushed to move, thereby driving the guide plate 41 to slide stably horizontally under the support of the guide rail and the slide block 400. And when the separation bucket 11 rotates one revolution, the scraper 13 slides back and forth once.

[0050] As the pressure plate 12 descends, the support plate 47 descends first, causing the two toothed rings 46 to separate from each other, thus disconnecting the linkage between the rotary drive assembly 2 and the reciprocating scraper assembly 4, preventing the scraper 13 from scraping out suspended matter during the dewatering process. Subsequently, the pressure plate 12 continues to descend, the top wall of the sleeve 45 abuts against the rotating shaft 44, and the support plate 47 stops moving.

[0051] like Figure 4 As shown: The present invention also includes a feeding hopper 14, one end of which is attached to and fixedly connected to the top of the partition 10, and the other end of which is attached to and connected to the top of the separation tank 11. The feeding hopper 14 and the scraper 13 are respectively located at both ends of the partition 10. A water inlet pipe 15 is fixedly connected to the top of one end of the waste liquid tank 1, and a drain pipe 16 is connected to the bottom of the other end of the waste liquid tank 1. An aeration pipe 17 is fixedly connected to the bottom of the waste liquid tank 1.

[0052] Waste alkali solution is injected into the waste liquid tank 1 at the end furthest from the separation tank 11 through the inlet pipe 15. Air is then injected into the bottom of the water body through the aeration pipe 17, causing impurities and bubbles in the waste alkali solution to clump together, forming suspended solids that float to the top of the water body. Pushed by the scraper 13, the solids overflow the baffle 10 and are then fed into one side of the separation tank 11 through the discharge hopper 14. As the separation tank 11 rotates and the suspended solids flow, they are evenly distributed within the separation tank 11. Finally, the separated water flows into the bottom of the waste liquid tank 1 and is discharged through the drain pipe 16.

[0053] This embodiment also includes a treatment method for a waste alkali liquid treatment device, comprising the following steps: Step 1: Injecting waste alkali liquid into waste liquid tank 1 through inlet pipe 15, and injecting gas into waste liquid tank 1 through aeration pipe 17, so that impurities in waste alkali liquid form suspended solids; Step 2: Using the set rotary drive component 2, the separation tank 11 rotates one revolution, and at the same time, through the linkage between the rotary drive component 2 and the reciprocating scraping component 4, the scraper 13 moves horizontally reciprocally once, pushing a fixed amount of suspended solids from the top of the partition 10 into the separation tank 11 and distributing it evenly, and the water in the suspended solids is initially separated through the drain hole 110; Step 3: Using the set extrusion drainage component 3, the pressure is pushed... Plate 12 descends into the separation tank 11 to prevent water from splashing out. At the same time, the linkage between the rotary drive assembly 2 and the reciprocating scraper assembly 4 is disengaged to prevent excessive suspended matter from being scraped out. Step 4: The rotary drive assembly 2 continues to drive the separation tank 11 and the pressure plate 12 to rotate at high speed. The centrifugal force causes the impurities and water in the suspended matter to be separated quickly. After the rotation stops, the water is discharged through the drain hole 110, achieving secondary separation. Step 5: The squeezing and draining assembly 3 continues to push the pressure plate 12 down, squeezing out the water in the impurities again through the downward pressure and discharging it through the drain pipe 16 to improve the separation effect. At the same time, it pushes the top plate 32 up to insert the plug 320 into the drain hole 110 to prevent impurities from being squeezed out.

[0054] In this embodiment, a waste alkali liquid treatment device is used by first injecting the waste alkali liquid into the waste liquid tank 1 away from the separation tank 11 through the inlet pipe 15. Then, air is injected into the bottom of the water body through the aeration pipe 17, causing impurities and bubbles in the waste alkali liquid to clump together to form suspended matter that floats to the surface. Once the water level rises to the top of the baffle 10, the rotary drive assembly 2 is activated to drive the separation tank 11 to rotate one revolution. Simultaneously, through its linkage with the reciprocating scraper assembly 4, the scraper 13 slides back and forth once. When the scraper 13 moves away from the baffle 10, the inclined structure lifts the suspended matter. When it reverses and resets, it pushes a fixed amount of suspended matter over the baffle 10 and guides it into the rotating separation tank 11 through the discharge hopper 14, achieving uniform distribution of suspended matter. The drain hole 110 on the separation tank 11 completes the initial separation, quickly draining the water carried out by the scraper 13. At the same time, the fixed-amount scraping avoids the equipment running idle and extends its service life. Subsequently, the squeezing and draining assembly 3 is activated, pushing the pressure plate 12 down into the separation tank 11. Simultaneously, the linkage between the rotary drive assembly 2 and the reciprocating scraping assembly 4 is disconnected, controlling the separation tank 11 to rotate rapidly. Centrifugal force is used to complete secondary dehydration, and the separated water is discharged through the drain hole 110. After the separation tank 11 stops rotating, the pressure plate 12 continues to descend, squeezing out the water from the impurities through pressure. At the same time, the top plate 32 rises, causing the plug 320 to insert into the drain hole 110. A gap is left between the plug 320 and the drain hole 110 to ensure slow water discharge, preventing impurities from being squeezed out and further improving the separation effect.

[0055] The motor 23 drives the rotating column 20 and the separation barrel 11 to rotate through the meshing of two spur gears 24. The speed of the motor 23 can be adjusted so that the separation barrel 11 rotates at a low speed during the scraping stage to ensure uniform distribution of suspended matter, and rotates at a high speed during the dewatering stage to improve dewatering efficiency. The hydraulic rod 31 pushes the slider 30 to slide along the long groove 200, which drives the pressure plate 12 to rise and fall. When the rotating column 20 rotates, the pressure plate 12 rotates synchronously through the contact between the long groove 200 and the rotating block, preventing excessive wear. During the descent of the pressure plate 12, the support plate 47 first descends, allowing the sleeve 45 to separate from the gear ring 46 of the rotating shaft 44 to disconnect the linkage and prevent the scraper 13 from scraping out suspended matter during dewatering. Then, the pressure plate 12 continues to descend, causing the spring 48 to stretch and consume excess stroke. When the pressure plate 12 rises, the spring 48 retracts, causing the gear ring 46 to re-engage and restore the linkage, ensuring that the scraper 13 slides synchronously once for every one rotation of the separation barrel 11. Finally, the separated water flows to the bottom of waste liquid tank 1 and is discharged through drain pipe 16. The entire process achieves efficient and layered separation of impurities and water in the waste alkaline solution, with smooth operation and a high degree of automation. It reduces equipment wear and extends service life through quantitative scraping and linkage control, and improves the separation effect through centrifugation and extrusion for dual dehydration, ensuring a stable and efficient treatment process.

[0056] It should be stated that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to the present invention. However, such variations, as long as they do not depart from the spirit of the present invention, should be within the scope of protection of the present invention. Furthermore, some terminology used in this specification and claims is not limiting, but merely for the purpose of clearly describing the positional relationships and functions of the components.

Claims

1. A waste alkali liquid treatment device, comprising a waste liquid tank (1) and a partition (10), wherein the partition (10) is fixedly connected to the inner wall of the waste liquid tank (1), characterized in that, It also includes a separation tank (11), a pressure plate (12), a scraper (13), a rotary drive assembly (2), a squeezing and draining assembly (3), and a reciprocating scraping assembly (4). The separation tank (11) is rotatably installed on the waste liquid tank (1) via the rotary drive assembly (2). The bottom wall of the separation tank (11) is provided with multiple drainage holes (110). The pressure plate (12) is vertically slidably installed on the waste liquid tank (1) via the squeezing and draining assembly (3). The scraper (13) is used to push suspended solids into the separation tank (11). The pressure plate (12) is attached to the inner wall of the separation tank (11). The scraper (13) is horizontally slidably installed on the waste liquid tank (1) via the reciprocating scraping assembly (4). One end of the scraper (13) is a sloping structure. The other end of the scraper (13) is attached to the partition (10). The top of the scraper (13) is higher than the top of the partition (10).

2. The waste alkali liquid treatment device according to claim 1, characterized in that, The rotary drive assembly (2) includes a rotating column (20), a frame (21), a base (22), a motor (23), and a pair of spur gears (24). The frame (21) is fixedly connected to the top of the waste liquid tank (1), the base (22) is fixedly connected to the bottom wall of the waste liquid tank (1), the bottom of the rotating column (20) is rotatably connected to the base (22), the top of the rotating column (20) passes through the frame (21) and is rotatably connected to it, the bottom of the motor (23) is fixedly connected to the frame (21), the output shaft of the motor (23) passes through the frame (21) and is coaxially connected to one of the spur gears (24), the other spur gear (24) is coaxially connected to the rotating column (20), the two spur gears (24) mesh with each other, and the rotating column (20) passes through the separation tank (11) and is coaxially connected to it.

3. The waste alkali liquid treatment device according to claim 2, characterized in that, The rotating column (20) is a hollow tubular structure. The pressure plate (12) is slidably connected to the outer periphery of the rotating column (20). The squeezing and draining assembly (3) includes a slider (30) and a hydraulic rod (31). The protrusions at both ends of the slider (30) pass through the side wall of the rotating column (20) and are fixedly connected to the inner wall of the pressure plate (12). The hydraulic rod (31) is fixedly connected to the top of the frame (21). The telescopic end of the hydraulic rod (31) passes through the rotating column (20) and is rotatably connected to the slider (30). The side wall of the rotating column (20) is provided with a long groove (200) for the slider (30) to slide.

4. The waste alkali liquid treatment device according to claim 3, characterized in that, The squeeze drainage assembly (3) also includes a top plate (32), a tension spring (33), a pair of racks (34) and a transmission gear (35). The top plate (32) is slidably connected to the periphery of the rotating column (20). A plurality of plugs (320) are fixedly connected to the top of the top plate (32). The plugs (320) are inserted into the drain hole (110). The diameter of the plugs (320) is smaller than the diameter of the drain hole (110). The bottom of the top plate (32) is inserted into the base (22) and slidably connected to it. The tension spring (34) is... 3) The spring (33) is fitted around the bottom of the top plate (32). One end of the spring (33) is rotatably connected to the top plate (32), and the other end of the spring (33) is fixedly connected to the base (22). The inner wall of the top plate (32) passes through the long groove (200) and is fixedly connected to one of the racks (34). The other rack (34) is fixedly connected to the bottom of the slider (30). The transmission gear (35) is rotatably connected to the inner wall of the rotating column (20). The two racks (34) mesh with the two sides of the transmission gear (35) respectively.

5. The waste alkali liquid treatment device according to claim 2, characterized in that, The reciprocating scraper assembly (4) includes a pair of slide rails (40), a pair of slide blocks (400), and a guide plate (41). The bottom of the slide rails (40) is fixedly connected to the waste liquid tank (1), the bottom of the slide blocks (400) is slidably connected to the slide rails (40), the two sides of the scraper (13) are fixedly connected to the two slide blocks (400) respectively, and the guide plate (41) is fixedly connected to one of the slide blocks (400).

6. The waste alkali liquid treatment device according to claim 5, characterized in that, The reciprocating scraping assembly (4) further includes a pair of fixed frames (42), a drive rod (43), a rotating shaft (44), and a pair of first pulleys (440). The fixed frames (42) are fixedly connected to the waste liquid tank (1). The drive rod (43) is rotatably connected to the top of one of the fixed frames (42). One end of the drive rod (43) passes through one of the first pulleys (440) and is coaxially connected to it. The rotating shaft (44) is rotatably connected to the top of the other fixed frame (42). The rotating shaft (44) passes through the other first pulley (440) and is coaxially connected to it. The two first pulleys (440) are driven by a belt. The top of the guide plate (41) is provided with a through guide groove (410). The other end of the drive rod (43) passes through the guide groove (410) and is slidably connected to it.

7. The waste alkali liquid treatment device according to claim 6, characterized in that, The reciprocating scraping assembly (4) further includes a sleeve (45) and a pair of toothed rings (46). The sleeve (45) is sleeved around the shaft (44) and slidably connected thereto. One of the toothed rings (46) is coaxially connected to the top of the shaft (44), and the other toothed ring (46) is coaxially connected to the bottom wall of the sleeve (45). The teeth on the two toothed rings (46) are arranged opposite to each other and interlock.

8. The waste alkali liquid treatment device according to claim 7, characterized in that, The reciprocating scraping assembly (4) also includes a support plate (47), a pair of second pulleys (450) and a spring (48). The support plate (47) is slidably connected to the periphery of the rotating column (20). One end of the support plate (47) is slidably connected to the frame (21), and the other end of the support plate (47) is rotatably connected to the sleeve (45). One of the second pulleys (450) is coaxially connected to the rotating column (20), and the other second pulley (450) is coaxially connected to the sleeve (45). The second pulley (450) on the periphery of the rotating column (20) is rotatably connected to the top of the support plate (47). The two second pulleys (450) are driven by a belt. The spring (48) is sleeved on the periphery of the rotating column (20). One end of the spring (48) abuts against the top of the pressure plate (12), and the other end of the spring (48) is fixedly connected to the bottom of the support plate (47).

9. The waste alkali liquid treatment device according to claim 1, characterized in that, It also includes a feeding hopper (14), one end of which is attached to and fixedly connected to the top of the partition (10), and the other end of which is attached to and connected to the top of the separation tank (11). The feeding hopper (14) and the scraper (13) are located at both ends of the partition (10). A water inlet pipe (15) is fixedly connected to the top of one end of the waste liquid tank (1), and a drain pipe (16) is connected to the bottom of the other end of the waste liquid tank (1). An aeration pipe (17) is fixedly connected to the bottom of the waste liquid tank (1).

10. A method for treating waste alkali solution according to any one of claims 1 to 9, characterized in that, Includes the following steps; Step 1: Inject waste alkali solution into waste liquid tank (1) through water inlet pipe (15), and inject gas into waste liquid tank (1) through aeration pipe (17) to make the impurities in waste alkali solution form suspended matter; Step 2: The set rotary drive component (2) makes the separation bucket (11) rotate one revolution. At the same time, through the linkage between the rotary drive component (2) and the reciprocating scraper component (4), the scraper (13) moves horizontally back and forth once, pushing a fixed amount of suspended matter from the top of the partition (10) into the separation bucket (11) and distributing it evenly. The water in the suspended matter is initially separated through the drain hole (110). Step 3: The pressure plate (12) is pushed down into the separation tank (11) by the set squeezing and draining component (3) to prevent water from splashing out. At the same time, the linkage between the rotary drive component (2) and the reciprocating scraping component (4) is released to prevent excessive suspended matter from being scraped out. Step 4: The rotary drive assembly (2) continues to drive the separation tank (11) and the pressure plate (12) to rotate at high speed. The centrifugal force causes the impurities and water in the suspended matter to be separated quickly. After the rotation stops, the water is discharged through the drain hole (110) to achieve secondary separation. Step 5: The squeezing and draining assembly (3) continues to push the pressure plate (12) down, squeezing out the water in the impurities again through the downward pressure and draining it through the drain pipe (16) to improve the separation effect. At the same time, it pushes the top plate (32) up to insert the plug (320) into the drain hole (110) to prevent the impurities from being squeezed out.

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