Chemical wastewater treatment device and method

Abstract

This invention relates to the field of wastewater treatment and discloses a chemical wastewater treatment device and method. The device includes an aeration tank and a movable shaft. The movable shaft is laterally rotatable inside the aeration tank, and a cleaning column is provided on the inner wall of the bottom of the aeration tank, which is drivenly connected to the movable shaft. A lifting plate is provided on one side of the movable shaft, and multiple connecting pipes are provided at the end of the lifting plate. Each connecting pipe has a buoyancy bladder at its top. A sleeve is provided in the middle of the cleaning column, and the end of the sleeve is drivenly connected to the bottom of the lifting plate. Multiple supports are provided on the outer wall of the sleeve, and a push rod is rotatably provided in the middle of each support. A push plate is rotatably provided at the end of the push rod. This invention uses the lifting plate's raising and lowering motion to drive the push plate to scrape sludge. When wastewater enters, it drives the bottom sludge to be cleaned. When wastewater is injected, the buoyancy bladder causes the lifting plate to move upwards. The lifting plate, through a transmission structure, pushes the sleeve upwards along the cleaning column. The sleeve drives the push rod and push plate to retract, scraping the settled sludge at the bottom of the aeration tank. The bottom sludge is cleaned by utilizing the rising liquid level of the injected wastewater, preventing sludge accumulation from affecting the aeration effect.

Description

Technical Field

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

[0002] Chemical wastewater is wastewater discharged during chemical production processes that contains organic matter, suspended solids, heavy metal ions, and acidic and alkaline substances. It is characterized by its complex composition, high concentration, and poor biodegradability. Direct discharge of chemical wastewater can cause eutrophication of water bodies, soil pollution, and ecological damage; therefore, it must be treated to meet standards before discharge.

[0003] In chemical wastewater treatment processes, aeration is a core component. Aeration introduces air or oxygen into the wastewater, providing dissolved oxygen for aerobic microorganisms to decompose organic matter. Simultaneously, the bubbles generated by aeration stir the wastewater, promoting mixing and contact between sludge and wastewater, thus improving the efficiency of the biochemical reaction. Aeration is typically carried out in aeration tanks or aeration chambers, with continuous aeration after wastewater is introduced, and clear water is discharged after treatment.

[0004] In existing technologies, aeration treatment devices mostly employ independent drive methods to achieve stirring and cleaning functions. Chinese invention patent CN120736705B discloses an aeration tank for wastewater treatment. This device includes a tank body, a drive motor, a rotating tube, aeration heads, and a cleaning and anti-clogging component. The drive motor drives the rotating tube and aeration heads to rotate via bevel gear transmission. A brush roller is installed inside the aeration head to clean the air holes and prevent clogging. This device achieves aeration and air hole cleaning functions through motor drive, and simultaneously incorporates a horizontal reciprocating movement mechanism to expand the aeration range.

[0005] However, in the aforementioned existing technologies, the bottom sludge cleaning process is separated from the sewage injection process. The cleaning action requires a separate start of the drive motor, which increases the energy consumption and control complexity of the equipment. In the early stage of sewage injection, the bottom sludge is not cleaned in time, and the sludge accumulation affects the aeration effect and reduces the organic matter degradation efficiency. Moreover, the cleaning mechanism is completely dependent on the motor drive. When the motor fails, the cleaning function fails, reducing the reliability of the equipment. In addition, the motor and transmission components such as bevel gear occupy the internal space of the tank, reducing the effective treatment volume and increasing the equipment manufacturing cost. After the sludge accumulates at the bottom of the aeration tank, it is necessary to stop the machine for manual cleaning or start an independent sludge removal device, which interrupts the continuity of sewage treatment, prolongs the treatment cycle, and reduces the operating efficiency.

[0006] Therefore, there is a need for a chemical wastewater treatment device that can automatically drive bottom sludge cleaning during wastewater injection, requires no additional power source, and allows sludge cleaning and aeration to be carried out simultaneously, in order to solve the problems of asynchronous sludge cleaning and wastewater treatment, high energy consumption, and complex structure in existing technologies. Summary of the Invention

[0007] The purpose of this invention is to provide a chemical wastewater treatment device and method to solve the above-mentioned problems. By raising and lowering a lifting plate, a push plate is driven to scrape sludge, thereby driving bottom sludge removal when wastewater enters. No additional power source is required. The bottom sludge is cleaned by utilizing the rising liquid level of the injected wastewater. The sludge removal process is carried out simultaneously with wastewater treatment, so that sludge is automatically cleaned when wastewater enters and aeration begins, avoiding sludge accumulation that affects the aeration effect. See the following description for details.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a chemical wastewater treatment device, including an aeration tank and a movable shaft. The movable shaft is laterally rotatable inside the aeration tank, and the bottom inner wall of the aeration tank is provided with a cleaning column that is kinetically connected to the movable shaft. A lifting plate is provided on one side of the movable shaft. Multiple connecting pipes are provided at the end of the lifting plate. A buoyancy bladder is provided at the top of each connecting pipe. A sleeve is provided in the middle of the cleaning column. The end of the sleeve is connected to the bottom of the lifting plate. Multiple supports are provided on the outer wall of the sleeve. A push rod is rotatably provided in the middle of the support. A push plate is rotatably provided at the end of the push rod.

[0009] Preferably, the bottom of the lifting plate is provided with a hinge seat, the middle of the hinge seat is rotatably provided with a transmission rod, one side of the end of the sleeve is provided with a rotating seat, and the middle of the rotating seat is provided with a connecting rod whose end is rotatably connected to the transmission rod.

[0010] Preferably, the cleaning column is a threaded column, and the inner wall of the sleeve is threadedly connected to the cleaning column.

[0011] Preferably, the top of the cleaning column is provided with a limiting plate, and the middle part of the cleaning column is fitted with a compression spring with its two ends respectively abutting against the limiting plate and the top of the sleeve.

[0012] Preferably, the movable shaft is provided with an opening and closing plate on the side away from the lifting plate, and the top of the opening and closing plate is provided with multiple counterweights to balance the weight on both sides of the movable shaft.

[0013] Preferably, the opening and closing plate is rotatably provided with a pull rod at its end, a slide rod is slidably connected to the middle of the pull rod, a sealing plate is fixed at the end of the slide rod, and an air inlet is provided on the side wall of the aeration tank, with the diameter of the sealing plate being larger than the diameter of the air inlet.

[0014] Preferably, the inner wall of the aeration tank is provided with a guide rail at the position corresponding to the air inlet, the sealing plate is slidably connected to the guide rail, and positioning plates are fixed at both the upper and lower ends of the guide rail to limit the movement range of the sealing plate.

[0015] Preferably, the aeration tank has a support frame in the middle, and a rotating column with its top rotatably connected to the aeration tank is rotatably mounted in the middle of the support frame. The rotating column has multiple stirring rods in the middle. A motor is fixed to the top of the aeration tank, and the output shaft of the motor is fixed to the upper end of the rotating column. The top of the aeration tank has a water inlet, and the middle of the support frame has multiple through slots to allow sewage to pass through. The bottom of the side wall of the aeration tank has a drain outlet, the bottom of the aeration tank has multiple support legs, and the top of the aeration tank has a vent pipe to discharge internal gas.

[0016] Preferably, the support frame has multiple positioning holes in the middle that are adapted to the connecting pipe, and the inner wall of the aeration tank is fixed with a positioning frame. The positioning frame corresponds vertically to the positioning holes, and the connecting pipe passes through the positioning frame and is guided by the positioning frame to keep the middle section of the connecting pipe vertical.

[0017] This invention also provides a method for treating chemical wastewater, comprising the following steps: a. Chemical wastewater is injected into the aeration tank through the inlet. As the wastewater level rises, the buoyancy bladder moves the lifting plate and connecting pipe upwards with the rising liquid level. The connecting pipe rises vertically along the positioning frame guide. The lifting plate pushes the sleeve upwards along the cleaning column through the transmission rod and connecting rod. At the same time, the inner wall of the sleeve cooperates with the threaded cleaning column to make the sleeve rise and rotate, which drives the push rod and push plate to retract and scrape the sludge at the bottom of the aeration tank. At the same time, the downward pressure spring is compressed to store force. b. During the upward movement of the lifting plate, the movable shaft rotates around the middle fulcrum, driving the opening and closing plate on the other side of the movable shaft to descend. The opening and closing plate pulls the sealing plate down along the guide rail through the pull rod, so that the sealing plate is separated from the air inlet, the air inlet opens, and the outside air enters the aeration tank for aeration treatment. c. During the aeration process, the motor is started to drive the rotating column and stirring rod to rotate, which stirs the sewage inside the aeration tank. The through groove in the middle of the support frame allows the sewage to flow, and the vent pipe discharges the internal gas. d. After the sewage treatment is completed, the treated sewage is discharged through the drain outlet. The liquid level drops, causing the buoyancy bladder to lose buoyancy. The pressure spring releases its elastic force, pushing the sleeve to move down along the cleaning column and rotate in the opposite direction, driving the push rod and push plate to expand and reset. At the same time, the lifting plate sinks down. e. During the sinking process of the lifting plate, the movable shaft rotates in the opposite direction, causing the opening and closing plate to move upward. The opening and closing plate pushes the sealing plate along the guide rail through the pull rod until the sealing plate closes the air inlet and stops aeration.

[0018] The beneficial effects are as follows: 1. This invention uses the lifting plate to drive the push plate to scrape sludge, thereby driving the bottom sludge removal when sewage enters. When sewage is injected, the buoyancy bladder drives the lifting plate to move upward. The lifting plate pushes the sleeve to rise along the cleaning column through the transmission structure. The sleeve drives the push rod and push plate to retract and scrape the sludge that settles at the bottom of the aeration tank. No additional power source is required. The bottom sludge cleaning is completed by utilizing the rising liquid level of the injected sewage. The sludge removal process is carried out simultaneously with sewage treatment, so that the sludge is automatically cleaned when sewage enters and aeration begins, avoiding sludge accumulation that affects the aeration effect.

[0019] 2. When the lifting plate moves up, the movable shaft drives the opening and closing plate to move down. The opening and closing plate pulls the sealing plate through the pull rod to open the air inlet. The higher the liquid level, the larger the air inlet opens. The aeration volume is adjusted synchronously with the sewage volume. After the sewage treatment is completed, the liquid level drops, the sealing plate closes the air inlet and stops aeration, avoiding idling and wasting energy, and realizing automatic synchronization between aeration start and stop and sewage treatment process.

[0020] 3. The sleeve rotates synchronously as it rises along the threaded cleaning column. The push rod and push plate rotate during the lifting and lowering process. The sludge scraping trajectory of the push plate is spiral, which covers a larger area compared to straight sludge scraping. The sludge at the bottom of the aeration tank is scraped by the spiral, making the cleaning more thorough and less likely to leave dead corners.

[0021] 4. When the sleeve moves upward, the compression spring is compressed and stores energy. When draining, the buoyancy disappears, the compression spring releases its elasticity and pushes the sleeve downward and rotates in the opposite direction. During the process of the push rod and push plate expanding and resetting, the sludge is scraped again. The secondary sludge removal is completed simultaneously during the drainage stage. Sludge removal is achieved in both the upper and lower strokes, thus improving the sludge removal efficiency.

[0022] 5. The counterweight at the top of the opening and closing plate balances the weight on both sides of the movable shaft. When the movable shaft is stationary, it maintains a stable position on both sides. When the liquid level fluctuation is small, the movable shaft will not malfunction. The sealing plate maintains a stable and sealed state, avoiding frequent opening and closing of the air inlet, which would lead to unstable aeration.

[0023] 6. The connecting pipe passes through the positioning frame to maintain vertical lifting and lowering. The buoyancy applied by the buoyancy bag is transmitted to the lifting plate in the vertical direction. The lifting plate is evenly stressed and does not tilt. The movement trajectory of the transmission rod and connecting rod is stable. The lifting and rotating process of the sleeve is smooth. The mud scraping force of the push plate is uniform.

[0024] 7. The sealing plate slides along the guide rail, and the upper and lower positioning plates limit the movement range of the sealing plate. When the sealing plate moves down to the lowest position, the air inlet is fully opened, and when the sealing plate moves up to the highest position, the air inlet is completely closed. The opening and closing positions are precise and controllable, avoiding the sealing plate from shifting and causing the air inlet to not seal properly or not open sufficiently.

[0025] 8. The motor drives the stirring rod to rotate and agitate the sewage. The sewage flows up and down through the support frame channel. External air enters through the air inlet and comes into full contact with the sewage. The synergistic effect of stirring and aeration makes oxygen dissolve more evenly and improves the degradation efficiency of organic matter in chemical wastewater. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the support frame of the present invention; Figure 5 This is a schematic diagram showing the internal structure of the present invention. Figure 6 This is the present invention. Figure 5 A magnified structural diagram at point A; Figure 7 This is a schematic diagram of the internal structure of the present invention from another perspective; Figure 8 This is a structural breakdown diagram of the cleaning column of the present invention; Figure 9 This is a cross-sectional view of the aeration tank of the present invention; Figure 10 This is a cross-sectional view of the internal structure of the aeration tank of the present invention; Figure 11 This is the present invention. Figure 10 A magnified structural diagram at point B; Figure 12 This is a cross-sectional view of the aeration tank from another angle of the present invention.

[0028] The annotations in the attached figures are explained as follows: 1. Aeration tank; 101. Guide rail; 101a. Positioning plate; 102. Positioning frame; 103. Ventilation pipe; 104. Motor; 105. Support leg; 106. Air inlet; 107. Drain outlet; 108. Water inlet; 2. Movable shaft; 201. Opening / closing plate; 202. Lifting plate; 203. Connecting pipe; 204. Buoyancy bag; 205. Counterweight; 206. Tie rod; 20 6a. Slide rod; 207. Sealing plate; 208. Hinge seat; 209. Transmission rod; 3. Support frame; 301. Rotating column; 302. Stirring rod; 303. Positioning hole; 304. Through groove; 4. Cleaning column; 401. Downward pressure spring; 401a. Limiting plate; 402. Rotating seat; 403. Connecting rod; 404. Support; 405. Push rod; 406. Push plate; 407. Sleeve. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] See Figures 1-12 As shown, the present invention provides a chemical wastewater treatment device, including an aeration tank 1 and a movable shaft 2. The movable shaft 2 is rotatably disposed inside the aeration tank 1 and rotates around the center. A cleaning column 4 is provided on the bottom inner wall of the aeration tank 1 and is connected to the movable shaft 2 in a transmission manner. The cleaning column 4 is vertically fixed to the bottom inner wall of the aeration tank 1. A lifting plate 202 is provided on one side of the movable shaft 2. The lifting plate 202 is fixed to one side of the movable shaft 2. When the movable shaft 2 rotates, the lifting plate 202 rotates and rises and falls with the movable shaft 2. Multiple connecting pipes 203 are provided at the end of the lifting plate 202. The connecting pipes 203 are vertically fixed to the end of the lifting plate 202. When the lifting plate 202 moves upward, the connecting pipes 203 move upward with it. Each connecting pipe 203 has a buoyancy bladder 204 at its top. The buoyancy bladder 204 is fixed to the top of the connecting pipe 203. When the sewage level rises, the buoyancy bladder 204 floats upward due to buoyancy. The upward movement of the buoyancy bladder 204 drives the connecting pipe 203 and the lifting plate 202 to move upward. A sleeve 407 is provided in the middle of the cleaning column 4. The sleeve 407 is sleeved on the outer wall of the cleaning column 4. The end of the sleeve 407 The sleeve 407 is connected to the bottom of the lifting plate 202. When the lifting plate 202 moves upward, it pushes the sleeve 407 to move upward along the cleaning column 4. The outer wall of the sleeve 407 is provided with multiple supports 404. The supports 404 are fixed to the outer wall of the sleeve 407. When the sleeve 407 moves, the supports 404 move synchronously with the sleeve 407. A push rod 405 is rotatably provided in the middle of the support 404. One end of the push rod 405 is rotatably connected to the middle of the support 404. The push rod 405 rotates around the support 404. A push plate 406 is rotatably provided at the end of the push rod 405. The push plate 406 is rotatably connected to the end of the push rod 405. When the push rod 405 rotates, it drives the push plate 406 to move. The push plate 406 abuts against the inner wall of the bottom of the aeration tank 1 to scrape off the settled sludge at the bottom of the aeration tank 1.

[0031] In the example of this application, the total buoyancy of the buoyancy bladder 204 is greater than the total weight of the lifting plate 202, the connecting pipe 203 and the transmission mechanism it drives, and the buoyancy margin is 1.2 to 2 times, so as to ensure that the sleeve 407 can be stably driven to move upward along the cleaning column 4 and complete the sludge removal action during the rise of sewage level.

[0032] As an optional implementation, a hinge seat 208 is provided at the bottom of the lifting plate 202. The hinge seat 208 is fixed to the bottom surface of the lifting plate 202. A transmission rod 209 is rotatably provided in the middle of the hinge seat 208. One end of the transmission rod 209 is rotatably connected to the middle of the hinge seat 208 via a rotating shaft. The transmission rod 209 rotates around the hinge seat 208. When the lifting plate 202 moves upward, the transmission rod 209 moves upward synchronously with the lifting plate 202. A rotating seat 402 is provided on one side of the end of the sleeve 407. The rotating seat 402 is fixed to the side wall of the end of the sleeve 407. A connecting rod 403 is rotatably provided in the middle of the rotating seat 402. One end of the connecting rod 403 is rotatably connected to the middle of the rotating seat 402 via a rotating shaft. The connecting rod 403 rotates around the rotating seat 402. The end of the connecting rod 403 is rotatably connected to the transmission rod 209. The end of connecting rod 403 away from rotating seat 402 is rotatably connected to the end of transmission rod 209 away from hinge seat 208 via a rotating shaft. A rotating pair is formed between transmission rod 209 and connecting rod 403. When lifting plate 202 moves upward, transmission rod 209 pushes connecting rod 403, connecting rod 403 rotates around rotating seat 402 and drives sleeve 407 to move. Cleaning column 4 is a threaded column, with threads on its outer wall. The inner wall of sleeve 407 has internal threads that match the threads of cleaning column 4. The inner wall of sleeve 407 is threadedly connected to cleaning column 4. When sleeve 407 moves along cleaning column 4, it rotates along the threaded trajectory. When lifting plate 202 pushes sleeve 407 upward, sleeve 407 rises and rotates along the threads of cleaning column 4. A limiting plate 401a is provided at the top of cleaning column 4 (see details). Figures 3-8 The limiting plate 401a is fixed to the top of the cleaning column 4. The diameter of the limiting plate 401a is larger than the diameter of the cleaning column 4. The limiting plate 401a restricts the upper limit position of the sleeve 407. A downward pressure spring 401 is sleeved in the middle of the cleaning column 4. The downward pressure spring 401 is sleeved on the outer wall of the cleaning column 4. One end of the downward pressure spring 401 abuts against the bottom surface of the limiting plate 401a, and the other end of the downward pressure spring 401 abuts against the top surface of the sleeve 407. When the sleeve 407 moves upward, it compresses the downward pressure spring 401. The downward pressure spring 401 stores force. When the sleeve 407 loses its lifting force, the downward pressure spring 401 releases its elastic force to push the sleeve 407 downward along the cleaning column 4.

[0033] In the example of this application, the sleeve 407 is connected to the cleaning column 4 by a threaded pair. Under the action of axial driving force, the sleeve 407 moves upward along the cleaning column 4 and generates restricted rotation, thereby driving the push plate 406 to form a spiral sludge scraping trajectory. The connecting rod 403 only provides axial driving force.

[0034] A closing plate 201 is provided on the side of the movable shaft 2 away from the lifting plate 202. The closing plate 201 is fixed to the other end of the movable shaft 2. When the movable shaft 2 rotates, the closing plate 201 and the lifting plate 202 move in opposite directions. When the lifting plate 202 moves upward, the closing plate 201 moves downward, and when the lifting plate 202 moves downward, the closing plate 201 moves upward. Multiple counterweights 205 are provided on the top of the closing plate 201. The counterweights 205 are fixed to the top surface of the closing plate 201, increasing the weight on one side of the closing plate 201. The counterweights 205 cause the movable shaft to... 2. The weight is balanced on both sides. A pull rod 206 is rotatably provided at the end of the opening and closing plate 201. One end of the pull rod 206 is rotatably connected to the end of the opening and closing plate 201 through a pivot. The pull rod 206 rotates around the end of the opening and closing plate 201. When the opening and closing plate 201 moves down, the pull rod 206 moves down accordingly. When the opening and closing plate 201 moves up, the pull rod 206 moves up accordingly. A sliding rod 206a is slidably connected in the middle of the pull rod 206. The sliding rod 206a passes through the middle of the pull rod 206 and slides along the length of the pull rod 206. When the pull rod 206 moves, the sliding rod 206a... 206a slides relative to the pull rod 206. A sealing plate 207 is fixed to the end of the slide rod 206a away from the pull rod 206. When the pull rod 206 moves, it drives the sealing plate 207 to move through the slide rod 206a. An air inlet 106 is provided on the side wall of the aeration tank 1. The air inlet 106 penetrates the side wall of the aeration tank 1, and external air enters the interior of the aeration tank 1 through the air inlet 106. The diameter of the sealing plate 207 is larger than the diameter of the air inlet 106. When the sealing plate 207 moves to the position of the air inlet 106... The sealing plate 207 covers the air inlet 106, sealing the air inlet 106. A guide rail 101 is provided on the inner wall of the aeration tank 1 at a position corresponding to the air inlet 106. The guide rail 101 is vertically fixed to the inner wall of the aeration tank 1 and is located to the side of the air inlet 106. The sealing plate 207 is slidably connected to the guide rail 101, and the sealing plate 207 slides vertically along the guide rail 101. The sealing plate 207 maintains a vertical movement trajectory guided by the guide rail 101. Positioning plates 101a are fixed at both the upper and lower ends of the guide rail 101 (see details). Figures 9-11 The positioning plate 101a is fixed to the end of the guide rail 101. The positioning plate 101a restricts the movement range of the sealing plate 207. The sealing plate 207 stops when it moves up to abut against the upper positioning plate 101a, and stops when it moves down to abut against the lower positioning plate 101a. The lifting range and amplitude of the lifting plate 202 and the opening and closing plate 201 are also guided by the guide rail 101 and positioned by the positioning plate 101a. When the lifting plate 202 and the opening and closing plate 201 are not working, the top of the sealing plate 207 abuts against the upper positioning plate 101a, so that the opening and closing plate 201, the lifting plate 202, and the rotating shaft as a whole maintain a stable posture.

[0035] In the example of this application, the edge of the sealing plate 207 is provided with an elastic sealing ring, which forms a sealing fit with the periphery of the air inlet 106 when the sealing plate 207 closes the air inlet 106, so as to improve the air tightness.

[0036] A support frame 3 is provided in the middle of the aeration tank 1. The support frame 3 is fixed to the inner wall of the aeration tank 1 and is horizontally mounted in the middle of the aeration tank 1. A rotating column 301 is rotatably mounted in the middle of the support frame 3. The rotating column 301 is vertically inserted through the middle of the support frame 3 and is rotatably connected to the middle of the support frame 3 through a bearing. The rotating column 301 rotates around its own axis. The top of the rotating column 301 is rotatably connected to the aeration tank 1, and the top of the rotating column 301 is rotatably connected to the top inner wall of the aeration tank 1 through a bearing. The aeration tank 1 is supported by the top of the rotating column 301. Multiple stirring rods 302 are located in the middle of the rotating column 301, spaced circumferentially along the outer wall of the rotating column 301. The stirring rods 302 are fixed to the outer wall of the rotating column 301. When the rotating column 301 rotates, the stirring rods 302 rotate synchronously with the rotating column 301, agitating the wastewater inside the aeration tank 1. A motor 104 is fixed to the top of the aeration tank 1, and its output shaft extends vertically downwards. The output shaft is fixed to the upper end of the rotating column 301. The output shaft of the motor 104 is fixedly connected to the top of the rotating column 301. When the motor 104 starts, the output shaft drives the rotating column 301 to rotate. The top of the aeration tank 1 is provided with an inlet 108, which passes through the top of the aeration tank 1. Wastewater is injected into the interior of the aeration tank 1 through the inlet 108. Multiple through slots 304 are provided in the middle of the support frame 3. The through slots 304 pass through the support frame 3 and are distributed along the support frame 3. Wastewater flows up and down through the through slots 304. When the stirring rod 302 rotates, the wastewater circulates through the channel 304. A drain outlet 107 is provided at the bottom of the side wall of the aeration tank 1, penetrating the bottom of the side wall. The treated wastewater is discharged from the aeration tank 1 through the drain outlet 107. Multiple support legs 105 are provided at the bottom of the aeration tank 1, fixed to the bottom surface of the aeration tank 1. The support legs 105 are distributed circumferentially along the bottom of the aeration tank 1, supporting the aeration tank 1 to maintain vertical stability. A vent pipe 103 is provided at the top of the aeration tank 1 (see details). Figure 12 The vent pipe 103 is opened through the top of the aeration tank 1, and the gas inside the aeration tank 1 is discharged through the vent pipe 103. The support frame 3 has multiple positioning holes 303 in the middle that are adapted to the connecting pipe 203. The positioning holes 303 are opened through the support frame 3, and the positions of the positioning holes 303 and the connecting pipe 203 correspond. The connecting pipe 203 passes through the positioning holes 303, and the positioning holes 303 restrict the lateral displacement of the connecting pipe 203. A positioning frame 102 is fixed to the inner wall of the aeration tank 1 (see details). Figure 12The positioning frame 102 is fixed to the inner wall of the aeration tank 1 and is located below the support frame 3. The positioning frame 102 corresponds vertically to the positioning hole 303. The hole on the positioning frame 102 is coaxially aligned with the positioning hole 303. The connecting pipe 203 passes through the positioning frame 102. The outer wall of the connecting pipe 203 slides in contact with the inner wall of the hole in the positioning frame 102. The connecting pipe 203 is guided by the positioning frame 102 to keep its middle section vertical. When the connecting pipe 203 rises and falls, it slides vertically along the hole in the positioning frame 102. The outer wall of the connecting pipe 203 slides in contact with the inner wall of the hole in the positioning frame 102. The positioning frame 102 restricts the lateral swing of the connecting pipe 203 and keeps the connecting pipe 203 in a vertical rising and falling trajectory. When the connecting pipe 203 is raised or lowered vertically, the buoyancy bladder 204 remains vertically floating or sinking. The buoyancy applied by the buoyancy bladder 204 to the connecting pipe 203 is transmitted vertically. The connecting pipe 203 transmits the buoyancy vertically to the lifting plate 202. The lifting plate 202 is pushed upward by the vertically upward lifting force. The direction of the lifting force is consistent with the direction of movement of the lifting plate 202, so that the lifting plate 202 rises smoothly without significant tilting.

[0037] A method for treating chemical wastewater includes the following steps: a. Chemical wastewater is injected into the aeration tank 1 through the inlet 108. As the wastewater level rises, the buoyancy bladder 204 moves the lifting plate 202 and connecting pipe 203 upwards with the rising liquid level. The connecting pipe 203 rises vertically along the positioning frame 102. The lifting plate 202 pushes the sleeve 407 upwards along the cleaning column 4 through the transmission rod 209 and connecting rod 403. At the same time, the inner wall of the sleeve 407 cooperates with the threaded cleaning column 4 to make the sleeve 407 rise and rotate, which drives the push rod 405 and push plate 406 to retract and scrape the sludge at the bottom of the aeration tank 1. At the same time, the downward pressure spring 401 is compressed to store force. b. During the upward movement of the lifting plate 202, the movable shaft 2 rotates around the middle as the fulcrum, which drives the opening and closing plate 201 on the other side of the movable shaft 2 to descend. The opening and closing plate 201 pulls the sealing plate 207 down along the guide rail 101 through the pull rod 206, so that the sealing plate 207 is separated from the air inlet 106, the air inlet 106 is opened, and the external air enters the aeration tank 1 for aeration treatment. c. During the aeration process, the motor 104 is started to drive the rotating column 301 and the stirring rod 302 to rotate, stirring the sewage inside the aeration tank 1. The through groove 304 in the middle of the support frame 3 allows the sewage to flow, and the vent pipe 103 discharges the internal gas. d. After the sewage treatment is completed, the treated sewage is discharged through the drain outlet 107. The liquid level drops, causing the buoyancy bladder 204 to lose buoyancy. The pressure spring 401 releases its elastic force to push the sleeve 407 to move down along the cleaning column 4 and rotate in the opposite direction, which drives the push rod 405 and the push plate 406 to expand and reset. At the same time, the lifting plate 202 sinks down. e. During the sinking process of the lifting plate 202, the movable shaft 2 rotates in the opposite direction to drive the opening and closing plate 201 to move upward. The opening and closing plate 201 pushes the sealing plate 207 to move upward along the guide rail 101 through the pull rod 206 until the sealing plate 207 closes the air inlet 106 and stops aeration.

[0038] The lifting plate 202 is raised and lowered to drive the push plate 406 to scrape sludge, thus driving the bottom sludge removal when sewage enters. When sewage is injected, the buoyancy bladder 204 drives the lifting plate 202 to move upward. The lifting plate 202 pushes the sleeve 407 to rise along the cleaning column 4 through the transmission structure. The sleeve 407 drives the push rod 405 and the push plate 406 to retract and scrape the sludge settling at the bottom of the aeration tank 1. No additional power source is required. The bottom sludge cleaning is completed by utilizing the rising liquid level of the injected sewage. The sludge removal process is carried out simultaneously with sewage treatment, so that the sludge is automatically cleaned when sewage enters and aeration begins, avoiding sludge accumulation that affects the aeration effect. When the lifting plate 202 moves upward, the movable shaft 2 drives the opening and closing plate 201 to move downward. The opening and closing plate 201 pulls the sealing plate 207 through the pull rod 206 to open the air inlet 106. The higher the liquid level, the larger the air inlet 106 opens. The aeration volume is adjusted synchronously with the sewage volume. After the sewage treatment is completed, the liquid level drops, and the sealing plate 207 closes the air inlet 106 to stop aeration, avoiding idling and wasting energy. This realizes automatic synchronization between the start and stop of aeration and the sewage treatment process. As the sleeve 407 rises along the threaded cleaning column 4, it rotates synchronously. The push rod 405 and push plate 406 rotate during the lifting and lowering process. The sludge scraping trajectory of the push plate 406 is spiral, which covers a larger area than straight sludge scraping. The sludge at the bottom of the aeration tank 1 is scraped by the spiral, making the cleaning more thorough and less likely to leave dead corners. When the sleeve 407 moves upward, it compresses the lower spring 401 to store energy. When draining, the buoyancy disappears, and the lower spring 401 releases its elasticity to push the sleeve 407 downward and rotate in the opposite direction. During the outward expansion and reset process of the push rod 405 and the push plate 406, the sludge is scraped again. The secondary sludge removal is completed simultaneously during the drainage stage. Sludge removal is achieved in both the upper and lower strokes, and the sludge removal efficiency is improved. The top counterweight 205 of the opening and closing plate 201 balances the weight on both sides of the movable shaft 2. When the movable shaft 2 is stationary, it maintains a stable position on both sides. When the liquid level fluctuation is small, the movable shaft 2 will not malfunction. The sealing plate 207 maintains a stable sealing state to avoid frequent opening and closing of the air inlet 106, which would lead to unstable aeration. The connecting pipe 203 passes through the positioning frame 102 to maintain vertical lifting and lowering. The buoyancy applied by the buoyancy bag 204 is transmitted to the lifting plate 202 in the vertical direction. The lifting plate 202 is subjected to uniform force and does not tilt. The movement trajectory of the transmission rod 209 and the connecting rod 403 is stable. The lifting and rotating process of the sleeve 407 is smooth. The scraping force of the push plate 406 is uniform. The sealing plate 207 slides along the guide rail 101. The upper and lower positioning plates 101a limit the range of movement of the sealing plate 207. When the sealing plate 207 moves down to the lowest position, the air inlet 106 is fully opened. When the sealing plate 207 moves up to the highest position, the air inlet 106 is fully closed. The opening and closing positions are precise and controllable, avoiding the sealing plate 207 from shifting and causing the air inlet 106 to be not sealed properly or not opened sufficiently. Motor 104 drives stirring rod 302 to rotate and agitate sewage. Sewage flows up and down through support frame 3 through channel 304. External air enters through air inlet 106 and comes into full contact with sewage. The synergistic effect of stirring and aeration makes oxygen dissolve more evenly and improves the degradation efficiency of organic matter in chemical wastewater.

[0039] This application constructs an adaptive linkage structure system driven by changes in wastewater level, integrating buoyancy drive, bottom sludge removal, and aeration control into a unified design. This allows the sludge removal mechanism to automatically activate and the aeration path to open simultaneously as wastewater enters the aeration tank 1. This fundamentally changes the traditional working mode where sludge removal relies on an independent power source and is separated from the treatment process. Simultaneously, the use of threaded joints enables the axial movement and restricted rotation of the sleeve 407, allowing the pusher plate 406 to form a wider spiral sludge scraping trajectory, effectively eliminating dead zones of bottom sludge accumulation and improving pollutant resuspension efficiency. During the drainage stage, an elastic reset structure enables reverse movement and secondary cleaning, thus allowing sludge removal to occur throughout the entire wastewater treatment process and significantly reducing the need for manual intervention. Furthermore, the liquid level-linked sealing plate structure automatically adjusts the opening and closing of the aeration ports according to the water volume, avoiding ineffective aeration and energy waste. This optimizes energy utilization while ensuring treatment efficiency. Simplified structure reduces the use of motors and complex transmission components, improving system reliability and effective treatment volume. This comprehensively enhances the device's continuous operation stability, energy efficiency, and ease of maintenance.

[0040] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A chemical wastewater treatment device, characterized in that: It includes an aeration tank (1) and a movable shaft (2). The movable shaft (2) is rotatably disposed inside the aeration tank (1), and the bottom inner wall of the aeration tank (1) is provided with a cleaning column (4) that is connected to the movable shaft (2) in a transmission. A lifting plate (202) is provided on one side of the movable shaft (2). Multiple connecting pipes (203) are provided at the end of the lifting plate (202). A buoyancy bladder (204) is provided at the top of each connecting pipe (203). A sleeve (407) is provided in the middle of the cleaning column (4). The end of the sleeve (407) is connected to the bottom of the lifting plate (202) in a transmission connection. Multiple supports (404) are provided on the outer wall of the sleeve (407). A push rod (405) is rotatably provided in the middle of the support (404). A push plate (406) is rotatably provided at the end of the push rod (405).

2. The chemical wastewater treatment device according to claim 1, characterized in that: The bottom of the lifting plate (202) is provided with a hinge seat (208), and a transmission rod (209) is rotatably provided in the middle of the hinge seat (208). A rotating seat (402) is provided on one side of the end of the sleeve (407), and a connecting rod (403) is rotatably connected to the transmission rod (209) at the end of the rotating seat (402).

3. The chemical wastewater treatment device according to claim 2, characterized in that: The cleaning column (4) is a threaded column, and the inner wall of the sleeve (407) is threadedly connected to the cleaning column (4).

4. The chemical wastewater treatment device according to claim 3, characterized in that: The cleaning column (4) is provided with a limiting plate (401a) at the top, and a compression spring (401) is sleeved in the middle of the cleaning column (4) with its two ends abutting against the top of the limiting plate (401a) and the sleeve (407) respectively.

5. The chemical wastewater treatment device according to claim 1, characterized in that: The movable shaft (2) is provided with an opening and closing plate (201) on the side away from the lifting plate (202). The top of the opening and closing plate (201) is provided with multiple counterweights (205). The counterweights (205) are used to balance the gravitational torque generated by the lifting plate (202) and its auxiliary components on the movable shaft (2).

6. The chemical wastewater treatment device according to claim 5, characterized in that: The opening and closing plate (201) is rotatably provided with a pull rod (206) at its end, and a slide rod (206a) is slidably sleeved on the pull rod (206). A sealing plate (207) is fixed at the end of the slide rod (206a). An air inlet (106) is opened on the side wall of the aeration tank (1). The diameter of the sealing plate (207) is larger than the diameter of the air inlet (106).

7. The chemical wastewater treatment device according to claim 6, characterized in that: The inner wall of the aeration tank (1) is provided with a guide rail (101) at the position corresponding to the air inlet (106). The sealing plate (207) is slidably connected to the guide rail (101), and the upper and lower ends of the guide rail (101) are fixed with positioning plates (101a) to limit the movement range of the sealing plate (207).

8. The chemical wastewater treatment device according to claim 1, characterized in that: The aeration tank (1) is provided with a support frame (3) in the middle. The support frame (3) is rotatably provided with a rotating column (301) at the top, which is rotatably connected to the aeration tank (1). The rotating column (301) is provided with multiple stirring rods (302) in the middle. The aeration tank (1) is fixed with a motor (104) at the top. The output shaft of the motor (104) is fixed to the upper end of the rotating column (301). The aeration tank (1) is provided with a water inlet (108) at the top. The support frame (3) is provided with multiple through slots (304) for water to flow through. The aeration tank (1) is provided with a drain outlet (107) at the bottom of the side wall. The aeration tank (1) is provided with multiple support legs (105) at the bottom. The aeration tank (1) is provided with a vent pipe (103) at the top to discharge internal gas.

9. The chemical wastewater treatment device according to claim 8, characterized in that: The support frame (3) has multiple positioning holes (303) in the middle that are adapted to the connecting pipe (203), and the inner wall of the aeration tank (1) is fixed with a positioning frame (102). The positioning frame (102) corresponds vertically to the positioning holes (303). The connecting pipe (203) passes through the positioning frame (102) and is guided by the positioning frame (102) to keep the middle section of the connecting pipe (203) vertical.

10. A method for treating chemical wastewater, characterized in that, The method applied to the chemical wastewater treatment apparatus as described in any one of claims 1-9 includes the following steps: a. Chemical wastewater is injected into the aeration tank (1) through the inlet (108). As the wastewater level rises, the buoyancy bladder (204) moves the lifting plate (202) and connecting pipe (203) upward with the rising liquid level. The connecting pipe (203) rises vertically along the positioning frame (102). The lifting plate (202) pushes the sleeve (407) upward along the cleaning column (4) through the transmission rod (209) and connecting rod (403). At the same time, the inner wall of the sleeve (407) cooperates with the threaded cleaning column (4) to make the sleeve (407) rise and rotate, which drives the push rod (405) and push plate (406) to retract and scrape the sludge at the bottom of the aeration tank (1). At the same time, the compression spring (401) is compressed to store power. b. During the upward movement of the lifting plate (202), the movable shaft (2) rotates around the middle as the fulcrum, causing the opening and closing plate (201) on the other side of the movable shaft (2) to descend. The opening and closing plate (201) pulls the sealing plate (207) down along the guide rail (101) through the pull rod (206), so that the sealing plate (207) is separated from the air inlet (106), the air inlet (106) opens, and the external air enters the aeration tank (1) for aeration treatment. c. During the aeration process, the motor (104) is started to drive the rotating column (301) and the stirring rod (302) to rotate, which stirs the sewage inside the aeration tank (1). The through groove (304) in the middle of the support frame (3) allows the sewage to flow, and the vent pipe (103) discharges the internal gas. d. After the sewage treatment is completed, the treated sewage is discharged through the drain outlet (107). The liquid level drops, causing the buoyancy bag (204) to lose buoyancy. The pressure spring (401) releases its elastic force to push the sleeve (407) to move down along the cleaning column (4) and rotate in the opposite direction, driving the push rod (405) and push plate (406) to expand and reset. At the same time, the lifting plate (202) sinks down. e. During the sinking process of the lifting plate (202), the movable shaft (2) rotates in the opposite direction to drive the opening and closing plate (201) to move upward. The opening and closing plate (201) pushes the sealing plate (207) to move upward along the guide rail (101) through the pull rod (206) until the sealing plate (207) closes the air inlet (106) and stops aeration.

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