Solid-liquid separation device and method based on culture wastewater treatment front end

Abstract

The invention relates to a solid-liquid separation device and method based on an aquaculture wastewater treatment front end, and belongs to the field of sewage treatment. The invention discloses a solid-liquid separation device based on an aquaculture wastewater treatment front end. The solid-liquid separation device comprises a sewage classification pool; the rotary driving assembly is arranged on the sewage classification tank; the number of the sewage separation assemblies is multiple, and the multiple sewage separation assemblies are arranged on the rotary driving assembly and are arranged at intervals in the circumferential direction of the rotary driving assembly; the lifting cover body assembly can be used for opening or closing the mounting opening of one of the plurality of sewage separation assemblies. Flushing liquid is input through the flushing inlet to flush the filtering cavity, flushing waste water is output to the second flow channel through the first flushing outlet, parallel development of cleaning operation and separation operation is achieved, and the overall efficiency of front-end solid-liquid separation is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a solid-liquid separation device and method for the front end of aquaculture wastewater treatment. Background Technology

[0002] Existing solid-liquid separation devices are mostly general-purpose, suitable for municipal sewage and industrial wastewater. There are no solid-liquid separation devices specifically designed for aquaculture wastewater, which is highly viscous, contains many impurities, and is highly abrasive. These devices cannot adapt to the diverse solid waste forms of aquaculture wastewater, which includes coarse particles, fine colloids, and a lot of sticky organic matter.

[0003] Faced with the weak acid corrosion, hard particle abrasion, and sticky substance adhesion of aquaculture wastewater, core components are prone to wear, corrosion, and scaling, making replacement troublesome and requiring a harsh operating environment. Summary of the Invention

[0004] Therefore, it is necessary to provide a solid-liquid separation device and method based on the front end of aquaculture wastewater treatment to address the problem of easy clogging of core components.

[0005] A solid-liquid separation device based on the front end of aquaculture wastewater treatment, comprising: The wastewater grading tank is provided with a positioning and installation area, and the wastewater grading tank is provided with a first flow channel and a second flow channel, which are located outside the installation and dispensing area; A rotary drive assembly is disposed on the wastewater grading tank and located at the positioning installation area; A wastewater separation assembly, wherein there are multiple wastewater separation assemblies, which are disposed on the rotary drive assembly and spaced apart along the circumference of the rotary drive assembly. Each wastewater separation assembly is provided with a filter chamber, and the wastewater separation assembly has an installation opening communicating with the filter chamber, a filtered water outlet, a flushing inlet, and a first flushing outlet. A lifting cover assembly, which is capable of opening or closing the installation opening of one of the plurality of sewage separation components, the lifting cover assembly having a sewage inlet, and the sewage inlet communicating with the filter chamber when the lifting cover assembly closes the installation opening; When the lifting cover assembly closes the installation opening, the sewage separation assembly has at least a first working state and a second working state. When the sewage separation assembly is in the first working state, it can filter the flowing liquid and output it to the first flow channel through the filtered water outlet. When the sewage separation assembly is in the second working state, it can input liquid through the flushing inlet to flush the filter chamber and output it to the second flow channel through the first flushing outlet.

[0006] The solid-liquid separation device disclosed in this application, based on the front end of aquaculture wastewater treatment, adopts a structure in which multiple wastewater separation components are arranged circumferentially along the rotating drive component. Combined with the switching control of the lifting cover component, continuous solid-liquid separation can be achieved, completely solving the efficiency bottleneck caused by the alternating separation and cleaning of the traditional single separation structure.

[0007] When the lifting cover assembly closes the installation opening of one of the wastewater separation components, that component enters its first working state. Aquaculture wastewater enters the filtration chamber through the wastewater inlet of the lifting cover assembly, and after filtration, it is output from the filtered water outlet to the first flow channel of the wastewater grading tank, completing solid-liquid separation. At the same time, other wastewater separation components can simultaneously enter their second working state, and flushing liquid is input through the flushing inlet to flush the filtration chamber. The flushing wastewater is output from the first flushing outlet to the second flow channel, realizing the parallel operation of cleaning and separation operations. This significantly improves the overall efficiency of front-end solid-liquid separation and can adapt to high-load scenarios with large volumes of aquaculture wastewater and high suspended solids content, reducing the treatment pressure on subsequent wastewater treatment processes such as anaerobic and aerobic treatment.

[0008] In addition, the first and second channels of the wastewater classification tank are designed to separate the filtered clean water and the rinsing wastewater, respectively. This avoids the mixing of filtered clean water with sludge-containing rinsing wastewater, ensuring the water quality stability of the separated clean water. At the same time, it facilitates the centralized collection and secondary treatment of rinsing wastewater, reducing resource waste and environmental pollution.

[0009] The upstream of aquaculture wastewater contains a large amount of suspended solids such as livestock and poultry manure and feed residue, which can easily cause blockage of the wastewater separation components. Traditional devices need to be shut down frequently for cleaning, which not only affects the continuity of operation, but also causes component wear due to frequent disassembly and cleaning, increasing maintenance costs.

[0010] This device effectively solves the clogging problem through its alternating separation and flushing operation design: After the sewage separation component completes solid-liquid separation in the first working state, it can switch to the second working state by rotating the drive component. The flushing liquid input from the flushing inlet is used to thoroughly flush the filter chamber, washing away the suspended solids and residues attached to the inner wall of the filter chamber. The residues are then discharged from the first flushing outlet to the second flow channel, realizing online self-cleaning of the sewage separation component without the need for shutdown and disassembly, which greatly reduces the risk of clogging.

[0011] The device operates automatically or semi-automatically through the coordinated control of the rotary drive component and the lifting cover component. Operators do not need complex professional skills; they only need to control the relevant drive components to complete the entire process of solid-liquid separation and online cleaning, which lowers the operating threshold and is suitable for the skill level of front-line operators in farms.

[0012] After being collected in the second channel of the wastewater classification tank, the rinsing wastewater can undergo secondary solid-liquid separation and drying. The separated solid residue can be processed into organic fertilizer, realizing resource recycling and meeting the needs of green and circular development in the aquaculture industry. The filtered clean water is collected in the first channel and can be used for greening irrigation and equipment rinsing in the aquaculture farm, improving water resource utilization, reducing water waste, and realizing the reduction, resource utilization, and harmless treatment of aquaculture wastewater.

[0013] In one embodiment, the wastewater separation assembly includes a filter cylinder, a filter element assembly, a first valve body, a second valve body, and a third valve body. The filter cylinder is mounted on the rotary drive assembly and has a filter chamber. The filter cylinder has an installation opening, a filtered water outlet, a flushing inlet, and a first flushing outlet. The filter element assembly is detachably mounted on the filter cylinder and located within the filter chamber. The filter element assembly has a first spray hole. The wastewater inlet, the filter chamber, and the filtered water outlet are sequentially connected. The flushing inlet is connected to the filter element assembly. The first spray hole, the filter chamber, and the first flushing outlet of the filter element assembly are sequentially connected. The first valve body, the second valve body, and the third valve body are mounted on the filter cylinder and are located at the filtered water outlet, the flushing inlet, and the first flushing outlet, respectively. The end of the second valve body away from the flushing inlet is used to connect to a high-pressure liquid source.

[0014] The integrated structure of the filter cartridge strengthens the foundation for separation and rinsing, and improves operational stability.

[0015] As the core load-bearing component of the wastewater separation assembly, the filter cartridge can be stably installed on the rotary drive assembly; on the other hand, the integrated filter cartridge does not require additional piping or additional installation structures.

[0016] The filter element assembly is detachably installed inside the filter chamber of the filter cartridge, forming a complete filtration channel with the wastewater inlet and the filtered water outlet. This allows for precise interception of aquaculture wastewater entering the filter chamber, effectively filtering out fine suspended solids, feed residues, and other impurities. Compared to a single filtration structure, this significantly improves solid-liquid separation accuracy, ensuring superior wastewater quality after filtration. Furthermore, the detachable structure eliminates the need to disassemble the entire wastewater separation assembly. When the filter element assembly experiences wear or severe clogging, it can be quickly removed, inspected, replaced, or deeply cleaned through the installation opening. This significantly reduces maintenance workload and costs, preventing component failure and decreased separation efficiency due to untimely maintenance, and extending the overall lifespan of the wastewater separation assembly.

[0017] The first nozzle of the filter element assembly allows the rinsing liquid to enter the filter element assembly through the rinsing inlet and then be sprayed out in a jet shape through the first nozzle, which can rinse the surface of the filter element assembly.

[0018] In one embodiment, the filter assembly includes a support base, a first backflow pipe, and a first filter plate. The support base is detachably mounted and has a first flow channel. The flushing inlet communicates with the first flow channel. The first backflow pipe has a plurality of first nozzles and a second flow channel that communicates with the plurality of first nozzles. The plurality of first nozzles communicate with the first flow channel via the second flow channel. The first filter plate is mounted on the support base and is adjacent to the first backflow pipe. The first backflow pipe is used to clean the first filter plate. The first backflow pipe, the first filter plate, and the first flushing outlet are arranged in sequence. The wastewater inlet, the first filter plate, the first backflow pipe, and the filtered water outlet are arranged in sequence.

[0019] The support base combines detachable installation with flow channel support, providing a solid foundation for the filter element assembly and balancing stability with ease of maintenance.

[0020] The support base is detachably mounted on the filter cartridge. On the one hand, it continues the advantage of the overall detachable design of the filter element assembly. Without disassembling the entire wastewater separation assembly, the support base and the first back-spray pipe and the first filter plate connected to it can be quickly removed through the installation opening. This allows for simultaneous inspection, replacement, or deep cleaning of the entire filter element assembly's sub-components, significantly reducing maintenance difficulty and workload, and preventing the failure of the entire filter element assembly due to the failure of a single sub-component. On the other hand, the first flow channel set on the support base is precisely connected to the flushing inlet, while providing a stable mounting carrier and fluid delivery channel for the first back-spray pipe. This ensures the smooth introduction of flushing liquid from the flushing inlet to the first flow channel, providing reliable fluid support for subsequent high-pressure jet cleaning. It also ensures the installation accuracy of the first back-spray pipe and the first filter plate, avoiding problems such as poor filtration and incomplete cleaning caused by installation deviations, thus solidifying the structural foundation for filtration and cleaning of the filter element assembly.

[0021] In one embodiment, the mounting opening and the filtered water outlet are located at both ends of the filter cartridge, and the flushing inlet and the first flushing outlet are located on the side wall of the filter cartridge. The mounting opening and the filtered water outlet are located at opposite ends of the filter cartridge, creating a smooth filtration flow path that balances filtration efficiency and ease of maintenance.

[0022] The installation opening and the filtered water outlet are located at both ends of the filter cartridge, forming an axial flow channel that runs through the entire filter cartridge. This precisely matches the filtration structure of the filter element assembly, perfectly fitting the filtration flow channel design of the sewage inlet, the first filter plate, the first back spray pipe, and the filtered water outlet.

[0023] This two-end layout allows aquaculture wastewater to flow smoothly along the axial direction of the filter cylinder after entering the filtration chamber, without bending or detouring, greatly reducing fluid resistance and preventing wastewater from stagnating and accumulating in the filtration chamber, thus improving solid-liquid separation efficiency. At the same time, the axial flow channel allows the wastewater to fully contact the first filter plate, ensuring more thorough filtration and more comprehensive cleaning, further guaranteeing stable filtered water quality.

[0024] In one embodiment, the support base includes a support ring and a support tube. The filter cylinder is provided with a plurality of support ribs at one end near the filtered water outlet. The plurality of support ribs are spaced apart. The support ring is detachably supported on the plurality of support ribs. The support tube is provided on the support ring. The support tube is provided with the first flow channel. The first backflow pipe and the first filter plate are provided on the support tube.

[0025] The support base is divided into two parts: a support ring and a support tube. The two work together to achieve the integrated functions of installation and fixation, flow channel bearing and component support, making the structural design more targeted.

[0026] Among them, the support pipe, as a core functional component, integrates the first flow channel, which can be precisely connected to the flushing inlet to realize the smooth delivery of flushing fluid from the flushing inlet to the second flow channel of the first backspray pipe. This provides stable fluid support for the high-pressure jet cleaning of the first nozzle, ensuring that the flushing fluid is delivered without stagnation or leakage. On the other hand, the support pipe provides a precise mounting carrier for the first backspray pipe and the first filter plate, ensuring that the two are accurately positioned and reasonably arranged. This ensures the smooth connection between the wastewater inlet of the filter channel, the first filter plate, the first backspray pipe, the filtered water outlet and the flushing channel, avoiding problems such as poor filtration and incomplete cleaning caused by installation deviations.

[0027] The support ring focuses on the overall installation and fixing function of the support base. After being fixedly connected with the support tube, it can stably support the support base and the components it carries in the filter cartridge. The clearly defined design simplifies the processing and manufacturing process of the support base and improves the reliability of each function, thus laying a solid structural foundation for the efficient operation of the filter cartridge.

[0028] In one embodiment, the first backflow nozzle includes a supporting inner ring, a water outlet branch pipe, and a reinforcing ring. The supporting inner ring is disposed on the supporting base, and the water outlet branch pipe is provided with a plurality of first spray holes. The number of water outlet branch pipes is plurality of, and the plurality of water outlet branch pipes are spaced apart on the supporting inner ring. The reinforcing ring is disposed on the plurality of water outlet branch pipes and is located at one end of the water outlet branch pipes away from the supporting inner ring.

[0029] The inner support ring is precisely positioned to solidify the foundation for the first reverse nozzle installation, ensuring unobstructed flow and precise injection. As the core mounting component of the first reverse nozzle, the inner support ring can be stably mounted on the support base.

[0030] Multiple water outlet branches are spaced apart and integrated with the first spray nozzle to achieve cleaning over a wider area, significantly improving cleaning efficiency and effectiveness.

[0031] In one embodiment, the filter cartridge assembly further includes a connecting rod, a second backflow pipe, and a second filter plate. The connecting rod is detachably mounted on the support base and has a third flow channel communicating with the first flow channel. The second backflow pipe is mounted on the connecting rod and has a fourth flow channel. The second backflow pipe has multiple second spray holes. The second filter plate is mounted on the connecting rod and adjacent to the second backflow pipe. The filter cartridge also has a second flushing outlet located between the mounting opening and the second filter plate. The wastewater separation assembly further includes a fourth valve body mounted on the filter cartridge and located at the second flushing outlet. The second flushing outlet can communicate with the second flow channel via the fourth valve body.

[0032] The detachable design of the connecting rod and its adaptation to the flow channel balance structural support and fluid delivery, improving ease of maintenance and flow channel stability. The detachable connecting rod is mounted on the support base, providing a stable mounting surface for the second reverse nozzle and second filter plate, ensuring precise positioning and a reasonable layout. This allows them to work in synergy with the existing first reverse nozzle and first filter plate, further improving the filtration and cleaning structure of the filter element assembly. Furthermore, the third flow channel on the connecting rod precisely connects to the first flow channel on the support base, enabling smooth delivery of the flushing fluid. This provides stable fluid support for the high-pressure jet cleaning of the second reverse nozzle, ensuring that the flushing fluid flows smoothly from the first and third flow channels into the second reverse nozzle without stagnation or leakage, thus guaranteeing stable cleaning pressure.

[0033] In addition, the detachable design eliminates the need to disassemble the entire filter element assembly or support base. When the second filter plate experiences wear, blockage, or other problems, the connecting rod can be quickly disassembled for inspection and replacement, significantly reducing maintenance workload and costs. It also prevents the entire filter element assembly from failing due to component failure, thus extending the overall service life of the filter element assembly.

[0034] In one embodiment, the rotary drive assembly includes a motor mounting bracket, a drive motor, a support chassis, ball bearings, and a rotating top plate. The motor mounting bracket is disposed on the wastewater grading tank and located in the positioning installation area. The drive motor is disposed on the motor mounting bracket. The support chassis is disposed on the mounting bracket. The rotating top plate is drivenly connected to the drive motor and is rotatably disposed on the support chassis. A limiting groove is provided between the rotating top plate and the support chassis. The number of ball bearings is multiple, and the multiple ball bearings are positioned within the limiting groove and supported between the rotating top plate and the support chassis.

[0035] The support chassis provides precise load-bearing support for the rotating top plate, ensuring smooth rotation. Mounted on the motor mounting bracket, the support chassis serves as the supporting carrier for the rotating top plate. Its core function is to provide a stable mounting and support foundation for the rotating top plate and ball bearings, balancing the forces on the entire rotating structure.

[0036] The structural design of the support chassis conforms to the layout of the motor mounting bracket, forming a firm connection with the motor mounting bracket to prevent shaking or displacement during operation, thus ensuring the smooth rotation of the rotating top plate. At the same time, the support chassis and the rotating top plate are correspondingly set, and with the help of limiting grooves and ball bearings, the rotating top plate can be effectively axially limited to prevent vertical displacement or shaking during rotation, ensuring that the rotating top plate always maintains a horizontal rotation state. This, in turn, ensures the stability of the position of the sewage separation component above and avoids problems such as component collisions and wastewater leakage caused by rotational displacement.

[0037] In addition, the supporting chassis can distribute the weight load of the rotating top plate and sewage separation components, avoiding structural deformation and damage caused by localized stress concentration, and extending the overall service life of the components.

[0038] The drive motor is mounted on a motor mounting bracket and directly connected to the rotating top plate. As the power core of the rotary drive assembly, it provides stable and controllable driving force, directly driving the rotating top plate to rotate at a uniform speed, thereby driving the wastewater separation assembly carried above to rotate synchronously, realizing the switching of work positions. In one embodiment, the lifting cover assembly includes a support frame, a lifting motor, a lifting rod, and a cover plate. The support frame is adjacent to the wastewater grading tank. The lifting motor is mounted on the support frame. The lifting rod is mounted on the lifting motor. The cover plate is mounted on the lifting rod. The cover plate has the wastewater inlet. The cover plate can open or close the installation opening of the wastewater separation assembly.

[0039] The support frame is precisely positioned to bear the load, providing a solid foundation for the component's operation and ensuring stable lifting movements. Located adjacent to the wastewater grading tank, the support frame serves as the core mounting component for the lifting cover assembly. It provides a unified and stable installation benchmark for the lifting motor, lifting rod, and cover plate, ensuring accurate positioning and reasonable layout of each sub-component. This prevents lifting movements from shifting or jamming due to installation deviations and ensures the cover plate is precisely aligned with the installation opening of the wastewater separation component.

[0040] In one embodiment, the second flow channel surrounds the positioning mounting area, and the first flow channel surrounds the second flow channel.

[0041] The concentric layout enables precise flow separation, eliminates mixing interference, and ensures stable separated water quality.

[0042] The first flow channel for filtered clean water and the second flow channel for flushing wastewater are arranged concentrically and in layers to form clear liquid flow zones. This structurally eliminates the problem of mixed flow between filtered clean water and flushing wastewater containing sludge, perfectly meeting the core requirements of diversion, collection, and classified treatment.

[0043] In one embodiment, the wastewater separation component is further provided with a sealing groove located at one end of the wastewater separation component facing the cover plate, and also includes a sealing ring disposed on the wastewater separation component and located at the sealing groove. When the lifting cover assembly closes the installation opening, the sealing ring is sandwiched between the wastewater separation component and the cover plate.

[0044] Precise positioning of the sealing groove ensures a solid foundation for the sealing ring installation and guarantees sealing stability. The sealing groove is located at the end of the wastewater separation component facing the cover plate and is specifically designed to accommodate and limit the sealing ring. Structurally, this ensures the sealing ring is precisely positioned and firmly fixed, preventing issues such as misalignment or detachment.

[0045] The dimensions of the sealing groove are precisely matched with the sealing ring, which can provide all-round circumferential and axial restraint for the sealing ring. This prevents the sealing ring from shifting due to vibration, friction or liquid flow impact during the lifting of the cover plate and the rotation of the sewage separation component. It ensures that the sealing ring is always between the contact surfaces of the cover plate and the sewage separation component, providing a foundation for stable sealing.

[0046] In addition, the layout of the sealing groove conforms to the contour of the installation opening, allowing the sealing ring to surround the installation opening and form a full-circumferential sealing structure, avoiding sealing blind spots and further improving sealing reliability.

[0047] The second aspect of this application discloses a solid-liquid separation method based on the front end of aquaculture wastewater treatment, comprising the following steps: S1: Start the rotary drive assembly to rotate one of the multiple sewage separation components to a preset position. After the sewage separation component moves to the preset position, start the lifting cover assembly to seal the installation opening of the sewage separation component that has moved to the preset position. S2: The sewage to be filtered is input into the filter chamber through the sewage inlet of the lifting cover assembly. The filtered sewage is discharged into the first flow channel through the filtered water outlet. The flow rate and water quality of the outlet of the first flow channel are monitored. When the flow rate and water quality of the liquid output from the first flow channel are lower than the set value, the input of sewage to be filtered into the filter chamber is stopped, and the filtered water outlet is closed at the same time. S3: Open the flushing inlet and input high-pressure water into the wastewater separation component through the flushing inlet. The high-pressure water is used for reverse flushing. At the same time, open the first flushing outlet to discharge the wastewater after flushing the wastewater separation component into the second flow channel. After the preset flushing time, close the flushing inlet and the first flushing outlet, and open the filtered water outlet.

[0048] The second aspect of this application provides a solid-liquid separation method based on the front end of aquaculture wastewater treatment. First, the rotary drive component is started to rotate one of the multiple wastewater separation components to a preset filtration position. Then, the installation opening is sealed by the lifting cover component. The core advantage of this step is that it achieves precise coordination of positioning and sealing, providing a reliable prerequisite for subsequent filtration operations.

[0049] The precise drive of the rotary drive component ensures that the wastewater separation component is accurately positioned and precisely aligned with the cover plate of the lifting cover component and the wastewater inlet, avoiding problems such as wastewater leakage and incomplete filtration caused by positioning deviation.

[0050] Wastewater to be filtered is input into the filtration chamber through the wastewater inlet, and the filtered clean water is discharged into the first flow channel through the filtered water outlet. At the same time, the flow rate and water quality at the outlet of the first flow channel are monitored. Whether the standards are met is used as the basis for judging the operation switch. This step realizes the precision and controllability of filtration and separation, and the core beneficial effect is outstanding.

[0051] The precise sewage inlet, combined with the dual filtration of the first and second filter plates in the filtration chamber, can perform graded and refined interception of aquaculture wastewater, effectively removing impurities such as suspended solids, feed residues, and fecal debris from the wastewater. This ensures that the filtered water meets the standards, reducing the load on subsequent deep wastewater treatment and lowering subsequent treatment costs.

[0052] High-pressure water is introduced through the flushing inlet and reverse flushing is achieved through the nozzles of the first and second reverse spray pipes. The flushing wastewater is discharged into the second flow channel through the first flushing outlet. After flushing is completed, the filter water outlet is reset. This step is the core to solve filter blockage and ensure the long-term stable operation of the device. It has the benefits of being both efficient and practical.

[0053] In one embodiment, the following steps are included before step S3: Start the lifting cover assembly to open the installation opening of the sewage separation assembly. Start the rotary drive assembly to rotate the sewage separation assembly that closed the filtered water outlet in step S2 to the position to be cleaned. At the same time, as the rotary drive assembly moves, it rotates another sewage separation assembly to be opposite the lifting cover assembly. Sewage to be filtered is then input into the filter chamber through the sewage inlet for recirculation filtration.

[0054] The lifting cover assembly opens the installation opening, and the rotating drive assembly moves the clogged wastewater separation component to the position to be cleaned. At the same time, another wastewater separation component moves to the corresponding position of the lifting cover assembly and starts filtration, realizing a cyclical operation. This is the key to optimizing the operation process and improving the overall treatment efficiency.

[0055] First, it achieves seamless alternation between filtration and cleaning components, completely solving the problem of the blank period in traditional processes where the device cannot perform filtration when the clogged components are waiting to be flushed. When the wastewater separation component with a clogged filter element closes the filtered water outlet, there is no need to wait for it to finish flushing. The standby wastewater separation component can be quickly connected to the lifting cover component by rotation to start a new round of filtration, ensuring that the input of aquaculture wastewater and solid-liquid separation operations are uninterrupted, greatly improving the overall treatment efficiency and adapting to the high-load wastewater discharge needs of aquaculture farms.

[0056] Secondly, the precise switching of workstations and clear division of labor ensure that clogged wastewater separation components are moved to the cleaning position and can wait in an orderly manner for the backwashing step, avoiding interference with the components that are being filtered. At the same time, the synchronous linkage of the rotating drive components can complete the relocation of clogged components and the placement of backup components in one go. The switching action is precise and efficient, requiring no additional manual intervention, further improving the automation level of the process.

[0057] Secondly, the timely opening of the installation opening provides a convenient prerequisite for subsequent backflushing. After the blocked component is moved to the position to be cleaned, there is no need to adjust the cover plate state. The flushing inlet can be opened directly for high-pressure flushing, reducing process connection steps, shortening flushing preparation time, and avoiding the accumulation of water vapor and solidification of impurities inside the component due to long-term blockage of the cover plate, which facilitates more thorough subsequent flushing.

[0058] Finally, the circulating filtration mode can make full use of the redundancy of multiple wastewater separation components, avoiding the shutdown of the entire device due to the failure or blockage of a single component, thus improving the stability and fault tolerance of the device operation. At the same time, the alternation frequency can be flexibly adjusted according to the wastewater impurity content and treatment volume to adapt to different operating conditions.

[0059] In one embodiment, step S3 is followed by the following step: Monitor the rotation interval of the rotary drive component. If the interval is less than the preset replacement time, replace the filter element of the sewage separation component. Attached Figure Description

[0060] Figure 1 This is a first perspective view of a solid-liquid separation device based on the front end of aquaculture wastewater treatment. Figure 2 This is a second perspective view of a solid-liquid separation device at the front end of aquaculture wastewater treatment; Figure 3 A 3D view of the rotary drive assembly; Figure 4 This is a first exploded view of the rotary drive assembly; Figure 5 This is a second exploded view of the rotary drive assembly; Figure 6 A 3D view of the wastewater separation component; Figure 7 This is the first exploded view of the wastewater separation component; Figure 8 This is the second exploded view of the wastewater separation component; Figure 9 This is a 3D view of the filter element assembly; Figure 10 This is an exploded view of the filter element assembly; Figure 11 A 3D view of the lifting cover assembly; Figure 12 A water quality monitoring system based on a solid-liquid separation method at the front end of aquaculture wastewater treatment; Figure 13 This is a flowchart of a solid-liquid separation method based on the front end of aquaculture wastewater treatment.

[0061] The correspondence between the reference numerals and the component names is as follows: 1 Wastewater grading tank, 101 Positioning installation area, 102 First flow channel, 103 Second flow channel; 2 Rotary drive assembly, 21 Motor mounting bracket, 22 Drive motor, 23 Support chassis, 24 Ball bearings, 25 Rotating top plate; 3 Wastewater separation assembly, 31 Filter cartridge, 32 Filter element assembly, 321 Support base, 3211 Support ring, 3212 Support pipe, 322 First backflow nozzle, 3221 Support inner ring, 3222 Outlet branch pipe, 3223 Reinforcing ring, 323 First filter plate, 324 Connecting rod, 325 Second backflow nozzle, 326 Second filter plate, 33 First valve body, 34 Second valve body, 35 Third valve body, 36 Fourth valve body, 301 Filter chamber, 302 Installation opening, 303 Filter water outlet, 304 Flushing inlet, 305 First flushing outlet, 306 Second flushing outlet, 3201 First spray hole; 4 Lifting cover assembly, 41 Support frame, 42 Lifting motor, 43 Lifting rod, 44 Cover plate, 401 Sewage inlet; 5. Sealing rings. Detailed Implementation

[0062] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0063] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

[0064] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0065] The following describes, with reference to the accompanying drawings, some embodiments of the solid-liquid separation device and method based on the front end of aquaculture wastewater treatment. Example 1

[0066] like Figures 1 to 11 As shown, this embodiment discloses a solid-liquid separation device for the front end of aquaculture wastewater treatment, comprising: Wastewater grading tank 1, wastewater grading tank 1 is provided with a positioning installation area 101, wastewater grading tank 1 is provided with a first flow channel 102 and a second flow channel 103, the first flow channel 102 and the second flow channel 103 are located outside the installation and dispensing area 101. Rotary drive assembly 2 is installed on the sewage grading tank 1 and located at the positioning installation area 101. Wastewater separation component 3, there are multiple wastewater separation components 3, multiple wastewater separation components 3 are arranged on the rotary drive component 2 and are spaced apart along the circumference of the rotary drive component 2. The wastewater separation component 3 is provided with a filter chamber 301, and the wastewater separation component 3 has an installation opening 302 communicating with the filter chamber 301, a filtered water outlet 303, a flushing inlet 304 and a first flushing outlet 305. The lifting cover assembly 4 can open or close the installation opening 302 of one of the multiple sewage separation components 3. The lifting cover assembly 4 has a sewage inlet 401. When the lifting cover assembly 4 closes the installation opening 302, the sewage inlet 401 is connected to the filter chamber 301. When the lifting cover assembly 4 closes the installation opening 302, the sewage separation assembly 3 has at least a first working state and a second working state. When the sewage separation assembly 3 is in the first working state, it can filter the flowing liquid and output it to the first flow channel 102 through the filtered water outlet 303. When the sewage separation assembly 3 is in the second working state, the flushing inlet 304 can input liquid to flush the filter chamber 301 and output it to the second flow channel 103 through the first flushing outlet 305.

[0067] The solid-liquid separation device disclosed in this application, based on the front end of aquaculture wastewater treatment, adopts a structure in which multiple sewage separation components 3 are arranged circumferentially along the rotating drive component 2. Combined with the switching control of the lifting cover component 4, continuous solid-liquid separation can be achieved, which completely solves the efficiency bottleneck caused by the alternating separation and cleaning of the traditional single separation structure.

[0068] When the lifting cover assembly 4 closes the installation opening 302 of one of the sewage separation components 3, the component enters the first working state. The aquaculture wastewater enters the filter chamber 301 through the sewage inlet 401 of the lifting cover assembly 4, and after filtration, it is output to the first flow channel 102 of the sewage classification tank 1 through the filtered water outlet 303, completing the solid-liquid separation. At the same time, the other sewage separation components 3 can be in the second working state simultaneously. The rinsing liquid is input through the rinsing inlet 304 to rinse the filter chamber 301. The rinsing wastewater is output to the second flow channel 103 through the first rinsing outlet 305, realizing the parallel operation of cleaning and separation operations. This greatly improves the overall efficiency of front-end solid-liquid separation and can adapt to high-load scenarios with large discharge volume and high suspended solids content of aquaculture wastewater, reducing the treatment pressure for subsequent wastewater treatment processes such as anaerobic and aerobic treatment.

[0069] Furthermore, the first flow channel 102 and the second flow channel 103 of the wastewater classification tank 1 are respectively designed for the separate discharge of filtered clean water and rinsing wastewater, avoiding the mixing of filtered clean water with sludge-containing rinsing wastewater, ensuring the water quality stability of the separated clean water, and facilitating the centralized collection and secondary treatment of rinsing wastewater, thus reducing resource waste and environmental pollution. Livestock wastewater contains a large amount of suspended solids such as livestock and poultry manure and feed residue, which can easily cause blockage of the wastewater separation component 3. Traditional devices require frequent shutdowns for cleaning, which not only affects the continuity of operation but also causes component wear due to frequent disassembly and cleaning, increasing maintenance costs.

[0070] This device effectively solves the clogging problem through its alternating separation and flushing operation design: After the sewage separation component 3 completes solid-liquid separation in the first working state, it can switch to the second working state by being driven by the rotary drive component 2. The flushing liquid input by the flushing inlet 304 thoroughly flushes the filter chamber 301, washing away the suspended solids and residues attached to the inner wall of the filter chamber 301. The residues are then discharged from the first flushing outlet 305 to the second flow channel 103, realizing online self-cleaning of the sewage separation component 3 without the need for shutdown and disassembly for cleaning, which greatly reduces the risk of clogging.

[0071] The overall operation of the device is achieved through the coordinated control of the rotary drive component 2 and the lifting cover component 4, enabling automated or semi-automated operation. Operators do not need complex professional skills; they only need to control the relevant drive components to complete the entire process of solid-liquid separation, online cleaning, etc., which lowers the operating threshold and is suitable for the skill level of front-line operators in farms.

[0072] After the rinsing wastewater is collected in the second channel 103 of the sewage classification tank 1, it can undergo secondary solid-liquid separation and drying. The separated solid residue can be processed into organic fertilizer, realizing resource recycling and meeting the needs of green and circular development in the aquaculture industry. The filtered clean water is collected in the first channel 102 and can be used for greening irrigation and equipment rinsing in the aquaculture farm, improving water resource utilization, reducing water waste, and realizing the reduction, resource utilization, and harmless treatment of aquaculture wastewater.

[0073] like Figures 6 to 10 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the sewage separation component 3 includes a filter cylinder 31, a filter element assembly 32, a first valve body 33, a second valve body 34, and a third valve body 35. The filter cylinder 31 is mounted on the rotary drive assembly 2 and has a filter chamber 301. The filter cylinder 31 has an installation opening 302, a filtered water outlet 303, a flushing inlet 304, and a first flushing outlet 305. The filter element assembly 32 is detachably mounted on the filter cylinder 31 and located within the filter chamber 301. The filter element assembly 32 has a first spray hole 3201. Water inlet 401, filter chamber 301 and filtered water outlet 303 are connected in sequence. Flushing inlet 304 is connected to filter element assembly 32. The first spray hole 3201, filter chamber 301 and first flushing outlet 305 of filter element assembly 32 are connected in sequence. First valve body 33, second valve body 34 and third valve body 35 are arranged on filter cylinder 31. The first valve body 33, second valve body 34 and third valve body 35 are located at filtered water outlet 303, flushing inlet 304 and first flushing outlet 305 respectively. The end of second valve body 34 away from flushing inlet 304 is used to connect to high pressure liquid source.

[0074] The integrated structure of the filter cartridge 31 strengthens the foundation for separation and rinsing, and improves operational stability.

[0075] As the core supporting component of the sewage separation assembly 3, the filter cartridge 31 can be stably installed on the rotary drive assembly 2; on the other hand, the filter cartridge 31 is integrated and does not require additional piping or additional installation structure.

[0076] The filter element assembly 32 is detachably installed in the filter chamber 301 of the filter cartridge 31, and forms a complete filtration channel with the sewage inlet 401 and the filtered water outlet 303. It can finely intercept the aquaculture wastewater entering the filter chamber 301, effectively filtering out fine suspended solids, feed residues and other impurities in the wastewater. Compared with a single filtration structure, it can significantly improve the solid-liquid separation accuracy and ensure better water quality after filtration. At the same time, the detachable structure does not require disassembling the entire sewage separation assembly 3. When the filter element assembly 32 has problems such as wear or severe blockage, it can be quickly removed, inspected, replaced or deeply cleaned through the installation opening 302. This greatly reduces the workload and cost of operation and maintenance, avoids the risk of component failure and reduced separation efficiency due to the inability to maintain the filter element assembly 32 in a timely manner, and extends the overall service life of the sewage separation assembly 3.

[0077] The first nozzle 3201 of the filter element assembly 32 allows the rinsing liquid to enter the filter element assembly 32 through the rinsing inlet 304 and then spray out in a jet shape through the first nozzle 3201, which can rinse the surface of the filter element assembly 32.

[0078] like Figure 9 and Figure 10 As shown, in addition to the features of the above embodiments, this embodiment further defines: the filter element assembly 32 includes a support base 321, a first backspray pipe 322, and a first filter plate 323. The support base 321 is detachably provided with a first flow channel. The flushing inlet 304 is connected to the first flow channel. The first backspray pipe 322 is provided with a plurality of first spray holes 3201. The first backspray pipe 323 is provided with a second flow channel. The second flow channel is connected to the plurality of first spray holes 3201. The plurality of first spray holes 3201 are connected to the first flow channel through the second flow channel. The first filter plate 323 is provided on the support base 321. The first filter plate 323 is adjacent to the first backspray pipe 322. The first backspray pipe 322 is used to clean the first filter plate 323. The first backspray pipe 322, the first filter plate 323, and the first flushing outlet 305 are arranged accordingly. The sewage inlet 401, the first filter plate 323, the first backspray pipe 322, and the filtered water outlet 303 are arranged accordingly.

[0079] The support base 321 has both detachable installation and flow channel bearing functions, which solidifies the working foundation of the filter element assembly 32 and takes into account both stability and ease of operation and maintenance.

[0080] The support base 321 is detachably mounted on the filter cartridge 31. On the one hand, it continues the overall detachable advantage of the filter element assembly 32. Without disassembling the entire sewage separation assembly 3, the support base 321 and the first backflow nozzle 322 and the first filter plate 323 connected to it can be quickly removed through the installation opening 302. This allows for simultaneous inspection, replacement, or deep cleaning of the entire filter element assembly 32's sub-components, significantly reducing maintenance difficulty and workload, and preventing the failure of the entire filter element assembly 32 due to the failure of a single sub-component. On the other hand, the first flow channel set on the support base 321 is precisely connected to the flushing inlet 304, while providing a stable mounting carrier and fluid delivery channel for the first backflow nozzle 322. This ensures the smooth introduction of flushing liquid from the flushing inlet 304 to the first flow channel, providing reliable fluid support for subsequent high-pressure jet cleaning. It also ensures the installation accuracy of the first backflow nozzle 322 and the first filter plate 323, avoiding problems such as poor filtration and incomplete cleaning caused by installation deviations, thus solidifying the structural foundation for filtration and cleaning of the filter element assembly 32.

[0081] like Figure 7 and Figure 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the installation opening 302 and the filtered water outlet 303 are located at both ends of the filter cylinder 31, and the flushing inlet 304 and the first flushing outlet 305 are located on the side wall of the filter cylinder 31.

[0082] The installation opening 302 and the filtered water outlet 303 are respectively located at both ends of the filter cylinder 31 to form a smooth filtration flow channel, taking into account both filtration efficiency and ease of operation and maintenance.

[0083] The installation opening 302 and the filtered water outlet 303 are located at both ends of the filter cylinder 31, forming an axial flow channel that runs through the entire filter cylinder 31. This precisely matches the filtration structure of the filter element assembly 32, perfectly fitting the filtration flow channel design of the sewage inlet 401, the first filter plate 323, the first back spray pipe 322, and the filtered water outlet 303.

[0084] This two-end layout allows the aquaculture wastewater to flow smoothly along the axial direction of the filter cylinder 31 after entering the filter chamber 301, without bending or detouring, greatly reducing fluid resistance and preventing wastewater from stagnating and accumulating in the filter chamber 301, thus improving solid-liquid separation efficiency. At the same time, the axial flow channel allows the wastewater to fully contact the first filter plate 323, ensuring more thorough filtration and more comprehensive cleaning, further guaranteeing the stability of the filtered water quality.

[0085] like Figure 9 and Figure 10As shown, in addition to the features of the above embodiments, this embodiment further defines: the support base 321 includes a support ring 3211 and a support tube 3212, a plurality of support ribs 311 are provided on one end of the filter cylinder 31 near the filtered water outlet 303, the plurality of support ribs 311 are spaced apart, the support ring 3211 is detachably supported on the plurality of support ribs 311, the support tube 3212 is provided on the support ring 3211, the support tube 3212 is provided with a first flow channel, and the first back spray pipe 322 and the first filter plate 323 are provided on the support tube 3212.

[0086] The support base 321 is divided into two parts: the support ring 3211 and the support tube 3212. The two work together to achieve the integrated functions of installation and fixation, flow channel bearing and component support, and the structural design is more targeted.

[0087] Among them, the support pipe 3212, as a core functional component, integrates the first flow channel, which can be precisely connected to the flushing inlet 304 to realize the smooth delivery of flushing fluid from the flushing inlet 304 to the second flow channel of the first backspray pipe 322. This provides stable fluid support for the high-pressure jet cleaning of the first nozzle 3201 and ensures that the flushing fluid is delivered without stagnation or leakage. On the other hand, the support pipe 3212 provides a precise mounting carrier for the first backspray pipe 322 and the first filter plate 323, which can ensure accurate positioning and reasonable layout of the two. This ensures smooth connection between the wastewater inlet 401, the first filter plate 323, the first backspray pipe 322, the filtered water outlet 303 and the flushing channel, avoiding problems such as poor filtration and incomplete cleaning caused by installation deviation.

[0088] The support ring 3211 focuses on the installation and fixing function of the support base 321. After being fixedly connected with the support tube 3212, it can stably support the support base 321 and the components it carries in the filter cartridge 31. The clearly defined design simplifies the processing and manufacturing process of the support base 321 and improves the reliability of each function, thus laying a solid structural foundation for the efficient operation of the filter element assembly 32.

[0089] like Figure 9 and Figure 10 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the first reverse nozzle 322 includes a supporting inner ring 3221, a water outlet branch pipe 3222, and a reinforcing ring 3223. The supporting inner ring 3221 is disposed on the supporting base 321. The water outlet branch pipe 3222 is provided with a plurality of first nozzle holes 3201. The number of water outlet branch pipes 3222 is plurality of, and the plurality of water outlet branch pipes 3222 are spaced apart on the supporting inner ring 3221. The reinforcing ring 3223 is disposed on the plurality of water outlet branch pipes 3222 and is located at one end of the water outlet branch pipe 3222 away from the supporting inner ring 3221.

[0090] Support the precise positioning of the inner ring 3221, solidify the foundation for the installation of the first reverse nozzle 322, and ensure smooth flow and precise injection.

[0091] The inner support ring 3221 serves as the core mounting and bearing component of the first reverse nozzle 322 and can be stably mounted on the support base 321.

[0092] Multiple water outlet branches 3222 are arranged at intervals and integrated with the first spray hole 3201 to achieve cleaning over a wider area and greatly improve cleaning efficiency and effect.

[0093] like Figure 9 and Figure 10 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the filter element assembly 32 also includes a connecting rod 324, a second backflow pipe 325, and a second filter plate 326. The connecting rod 324 is detachably mounted on the support base 321. The connecting rod 324 is provided with a third flow channel, which communicates with the first flow channel. The second backflow pipe 325 is mounted on the connecting rod 324 and is provided with a fourth flow channel. The second backflow pipe 325 is provided with a plurality of second spray holes 3202. The second filter plate 326 is mounted on the connecting rod 324 and is adjacent to the second backflow pipe 325. The filter cylinder 31 is also provided with a second flushing outlet 306, which is located between the mounting opening 302 and the second filter plate 326. The sewage separation assembly 3 also includes a fourth valve body 36, which is mounted on the filter cylinder 31 and located at the second flushing outlet 306. The second flushing outlet 306 can communicate with the second flow channel 103 through the fourth valve body 36.

[0094] The detachable design of the connecting rod 324, adapted to the flow channel, balances structural support and fluid delivery, improving ease of maintenance and flow channel stability. The connecting rod 324 is detachably mounted on the support base 321. On one hand, it provides a stable mounting platform for the second reverse nozzle 325 and the second filter plate 326, ensuring precise positioning and a reasonable layout. This allows them to work in synergy with the existing first reverse nozzle 323 and first filter plate 323, further improving the filtration and cleaning structure of the filter element assembly 32. On the other hand, the third flow channel on the connecting rod 324 precisely connects to the first flow channel of the support base 321, enabling smooth delivery of the flushing fluid. This provides stable fluid support for the high-pressure jet cleaning of the second reverse nozzle 325, ensuring that the flushing fluid flows smoothly from the first and third flow channels into the second reverse nozzle 325 without stagnation or leakage, thus guaranteeing stable cleaning pressure.

[0095] In addition, the detachable design eliminates the need to disassemble the entire filter element assembly 32 or the support base 321. When the second filter plate 326 experiences wear, blockage, or other problems, the connecting rod 324 can be quickly disassembled for inspection and replacement, significantly reducing maintenance workload and costs. At the same time, it avoids overall failure of the filter element assembly 32 due to component failure, thus extending the overall service life of the filter element assembly 32.

[0096] like Figure 3 , Figure 4 and Figure 5 As shown, in addition to the features of the above embodiments, this embodiment further defines: the rotary drive assembly 2 includes a motor mounting bracket 21, a drive motor 22, a support chassis 23, ball bearings 24, and a rotating top plate 25. The motor mounting bracket 21 is mounted on the sewage grading tank 1 and located at the positioning installation area 101. The drive motor 22 is mounted on the motor mounting bracket 21. The support chassis 23 is mounted on the mounting bracket 21. The rotating top plate 25 is connected to the drive motor 22 and is rotatably mounted on the support chassis 23. A limiting groove 201 is provided between the rotating top plate 25 and the support chassis 23. There are multiple ball bearings 24, which are positioned within the limiting groove 201 and supported between the rotating top plate 25 and the support chassis 23.

[0097] The supporting chassis 23 provides precise load bearing and stable support for the rotating top plate 25, ensuring smooth rotation.

[0098] The support chassis 23 is mounted on the motor mounting bracket 21 and serves as a support carrier for the rotating top plate 25. Its core function is to provide a stable mounting and support foundation for the rotating top plate 25 and the ball bearings 24, and to balance the forces on the entire rotating structure.

[0099] The structural design of the support chassis 23 fits the layout of the motor mounting bracket 21, forming a firm connection with the motor mounting bracket 21 to prevent shaking or displacement during operation, thus ensuring the smooth rotation of the rotating top plate 25. At the same time, the support chassis 23 and the rotating top plate 25 are correspondingly set, and together with the limiting groove 201 and the ball bearing 24, they can effectively limit the axial movement of the rotating top plate 25, preventing vertical displacement or shaking during rotation, ensuring that the rotating top plate 25 always maintains a horizontal rotation state, thereby ensuring the stability of the position of the sewage separation component 3 above, and avoiding problems such as component collision and wastewater leakage caused by rotational displacement.

[0100] In addition, the supporting chassis 23 can distribute the weight load of the rotating top plate 25 and the sewage separation component 3, avoid structural deformation and damage caused by localized stress concentration, and extend the overall service life of the component.

[0101] The drive motor 22 is mounted on the motor mounting bracket 21 and is directly connected to the rotating top plate 25. As the power core of the rotary drive assembly 2, it can provide stable and controllable driving force, directly driving the rotating top plate 25 to rotate at a uniform speed, thereby driving the sewage separation assembly 3 carried above to rotate synchronously, realizing the switching of work positions. like Figure 1 and Figure 11 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the lifting cover assembly 4 includes a support frame 41, a lifting motor 42, a lifting rod 43 and a cover plate 44. The support frame 41 is adjacent to the sewage grading tank 1. The lifting motor 42 is mounted on the support frame 41. The lifting rod 43 is mounted on the lifting motor 42. The cover plate 44 is mounted on the lifting rod 43. The cover plate 44 is provided with a sewage inlet 401. The cover plate 44 can open or close the installation opening 302 of the sewage separation assembly 3.

[0102] The support frame 41 is precisely positioned to support the load, providing a solid foundation for the component's operation and ensuring stable lifting movements. Located adjacent to the wastewater grading tank 1, the support frame 41 serves as the core mounting component for the lifting cover assembly 4. It provides a unified and stable installation reference for the lifting motor 42, lifting rod 43, and cover plate 44, ensuring accurate positioning and reasonable layout of each sub-component. This prevents lifting movements from shifting or jamming due to installation deviations and ensures that the cover plate 44 is precisely aligned with the installation opening 302 of the wastewater separation assembly 3.

[0103] like Figure 1 and Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the second flow channel 103 surrounds the positioning and mounting area 101, and the first flow channel 102 surrounds the second flow channel 103.

[0104] The concentric layout enables precise flow separation, eliminates mixing interference, and ensures stable separated water quality.

[0105] The first flow channel 102, the filtered clean water flow channel, and the second flow channel 103, the flushing wastewater flow channel, are arranged in a concentric, layered manner to form a clear liquid flow partition. This structurally eliminates the problem of mixed flow between filtered clean water and flushing wastewater containing slag, perfectly meeting the core requirements of diversion collection and classified treatment.

[0106] like Figure 7 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the sewage separation component 3 is also provided with a sealing groove, the sealing groove is located at one end of the sewage separation component 3 facing the cover plate 44, and also includes a sealing ring 5, the sealing ring 5 is disposed on the sewage separation component 3 and located at the sealing groove, and when the lifting cover assembly 4 closes the installation opening 302, the sealing ring 5 is sandwiched between the sewage separation component 3 and the cover plate 44.

[0107] The sealing groove is precisely positioned to solidify the foundation for the installation of the sealing ring 5 and ensure sealing stability. The sealing groove is located at the end of the sewage separation component 3 facing the cover plate 44, and is specifically used to accommodate and limit the sealing ring 5. Structurally, it ensures that the sealing ring 5 is installed in a precise and secure position, avoiding problems such as displacement or detachment of the sealing ring 5.

[0108] The dimensions of the sealing groove are precisely matched with the sealing ring 5, which can form a full-range circumferential and axial limit on the sealing ring 5, preventing the sealing ring 5 from being displaced due to vibration, friction or liquid flow impact during the lifting of the cover plate 44 and the rotation of the sewage separation component 3. This ensures that the sealing ring 5 is always between the mating surfaces of the cover plate 44 and the sewage separation component 3, providing a basis for stable sealing.

[0109] In addition, the layout of the sealing groove conforms to the contour of the mounting opening 302, allowing the sealing ring 5 to be set around the mounting opening 302 to form a full circumferential sealing structure, avoiding sealing blind spots and further improving sealing reliability. Example 2

[0110] like Figure 12 and Figure 13 As shown in the figure, this embodiment discloses a solid-liquid separation method based on the front end of aquaculture wastewater treatment, including the following steps: S1: Start the rotary drive assembly 2 to rotate one of the multiple sewage separation assemblies 3 to a preset position. After the sewage separation assembly 3 moves to the preset position, start the lifting cover assembly 4 to seal the installation opening 302 of the sewage separation assembly 3 that has moved to the preset position. S2: Wastewater to be filtered is input into the filter chamber 301 through the wastewater inlet 401 of the lifting cover assembly 4. The filtered wastewater is discharged into the first flow channel 102 through the filtered water outlet 303. The flow rate and water quality of the outlet of the first flow channel 102 are monitored. When the flow rate and water quality of the liquid output from the first flow channel 102 are lower than the set value, the input of wastewater to be filtered into the filter chamber 301 is stopped, and the filtered water outlet 303 is closed at the same time. S3: Open the flushing inlet 304 and input high-pressure water into the sewage separation component 3 through the flushing inlet 304. The high-pressure water is used for reverse flushing. At the same time, open the first flushing outlet 305 to discharge the sewage after flushing the sewage separation component 3 into the second flow channel 103. After the preset flushing time, close the flushing inlet 304 and the first flushing outlet 305, and open the filtered water outlet 303.

[0111] The second aspect of this application provides a method in which, in step S1, the rotary drive assembly 2 is activated to rotate one of the multiple wastewater separation components 3 to a preset filtration position, and then the installation opening 302 is sealed by the lifting cover assembly 4. The core advantage of this step lies in achieving precise coordination between positioning and sealing, providing a reliable prerequisite for subsequent filtration operations. The precise driving of the rotary drive assembly 2 ensures that the wastewater separation component 3 is accurately positioned at the preset location, precisely aligned with the cover plate 44 and wastewater inlet 401 of the lifting cover assembly 4, avoiding problems such as wastewater leakage and incomplete filtration caused by positioning deviations.

[0112] Step S2 involves inputting wastewater to be filtered into the filter chamber 301 through the wastewater inlet 401. The filtered clean water is then discharged into the first flow channel 102 through the filtered water outlet 303. Simultaneously, the flow rate and water quality at the outlet of the first flow channel 102 are monitored, and whether or not the standards are met serves as the basis for switching operations. This step achieves precise and controllable filtration and separation, with significant core benefits. The precise wastewater delivery through the wastewater inlet 401, combined with the dual filtration of the first filter plate 323 and the second filter plate 325 within the filter chamber 301, enables graded and refined interception of aquaculture wastewater. This efficiently removes suspended solids, feed residue, fecal debris, and other impurities from the wastewater, ensuring that the filtered clean water meets standards. This reduces the load on subsequent deep wastewater treatment and lowers subsequent treatment costs.

[0113] Step S3 involves opening the flushing inlet 304 to input high-pressure water, which is then used for reverse flushing through the nozzles of the first reverse spray pipe 323 and the second reverse spray pipe 325. The flushing wastewater is discharged into the second flow channel 103 through the first flushing outlet 305. After flushing is completed, the filter water outlet 303 is reset. This step is the core to solve the filter element blockage and ensure the long-term stable operation of the device. It has both high efficiency and practicality.

[0114] In addition to the features of the above embodiments, this embodiment further specifies that the following steps are included before step S3: Start the lifting cover assembly 4 to open the installation opening 302 of the sewage separation assembly 3, start the rotary drive assembly 2 to rotate the sewage separation assembly 3 that closed the filtered water outlet 303 in step S2 to the position to be cleaned, and at the same time, with the movement of the rotary drive assembly 2, rotate another sewage separation assembly 3 to be opposite to the lifting cover assembly 4, and input the sewage to be filtered into the filter chamber 301 through the sewage inlet 401 for recirculation filtration.

[0115] The lifting cover assembly 4 opens the installation opening 302, and the rotating drive assembly 2 drives the clogged sewage separation assembly 3 in S2 to the position to be cleaned. At the same time, another sewage separation assembly 3 is turned to the corresponding position of the lifting cover assembly 4 and the filter is started, realizing a cycle operation. This is the key to optimizing the operation process and improving the overall treatment efficiency.

[0116] First, it achieves seamless alternation between filtration and cleaning components, completely solving the problem of the blank period in traditional processes where the device cannot perform filtration when the clogged components are waiting to be flushed. When the sewage separation component 3 with clogged filter element in S2 closes the filtered water outlet 303, there is no need to wait for it to finish flushing. The standby sewage separation component 3 can be quickly connected to the lifting cover component 4 by rotation to start a new round of filtration, ensuring that the input of aquaculture wastewater and solid-liquid separation operations are not interrupted, greatly improving the overall treatment efficiency and adapting to the high-load wastewater discharge needs of aquaculture farms.

[0117] Secondly, the precise switching of workstations and clear division of labor ensure that the clogged sewage separation component 3 is moved to the cleaning position and can wait in an orderly manner for the S3 reverse flushing step, avoiding interference with the components that are being filtered. At the same time, the synchronous linkage of the rotation drive component 2 can complete the relocation of the clogged component and the placement of the spare component in one go. The switching action is precise and efficient, requiring no additional manual intervention, further improving the automation level of the process.

[0118] Furthermore, the timely opening of the installation opening 302 provides a convenient prerequisite for subsequent S3 reverse flushing. After the blocked component is moved to the position to be cleaned, there is no need to adjust the cover plate state. The flushing inlet 304 can be opened directly for high-pressure flushing, reducing process connection steps, shortening flushing preparation time, and avoiding the accumulation of water vapor and solidification of impurities inside the component caused by long-term blockage of the cover plate, which facilitates more thorough subsequent flushing.

[0119] Finally, the circulating filtration mode can make full use of the redundancy of multiple wastewater separation components 3, avoid the shutdown of the entire device due to the failure or blockage of a single component, improve the stability and fault tolerance of the device operation, and at the same time, the alternation frequency can be flexibly adjusted according to the wastewater impurity content and treatment volume to adapt to different working conditions.

[0120] In addition to the features of the above embodiments, this embodiment further specifies that: after step S3, the following steps are also included: Monitor the rotation interval of the rotary drive component 2. If the interval is less than the preset replacement time, replace the filter element component 32 of the sewage separation component 3.

[0121] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The above embodiments are merely examples of several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent.

[0123] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these modifications and improvements are all within the scope of protection of this invention.

[0124] Therefore, the scope of protection of this invention patent shall be determined by the appended claims.

Claims

1. A solid-liquid separation device for the front end of aquaculture wastewater treatment, characterized in that, The aforementioned solid-liquid separation device based on the front end of aquaculture wastewater treatment includes: Wastewater grading tank (1), the wastewater grading tank (1) is provided with a positioning installation area (101), the wastewater grading tank (1) is provided with a first flow channel (102) and a second flow channel (103), the first flow channel (102) and the second flow channel (103) are located outside the installation and dispensing area (101); A rotary drive assembly (2) is disposed on the wastewater grading tank (1) and located in the positioning installation area (101); Wastewater separation component (3), the number of the wastewater separation component (3) is multiple, the multiple wastewater separation components (3) are arranged on the rotary drive component (2) and are spaced apart along the circumference of the rotary drive component (2), the wastewater separation component (3) is provided with a filter chamber (301), the wastewater separation component (3) is provided with an installation opening (302) communicating with the filter chamber (301), a filtered water outlet (303), a flushing inlet (304) and a first flushing outlet (305); The lifting cover assembly (4) is capable of opening or closing the installation opening (302) of one of the plurality of sewage separation components (3). The lifting cover assembly (4) is provided with a sewage inlet (401). When the lifting cover assembly (4) closes the installation opening (302), the sewage inlet (401) is connected to the filter chamber (301). When the lifting cover assembly (4) closes the installation opening (302), the sewage separation assembly (3) has at least a first working state and a second working state. When the sewage separation assembly (3) is in the first working state, it can filter the flowing liquid and output it to the first flow channel (102) through the filtered water outlet (303). When the sewage separation assembly (3) is in the second working state, the flushing inlet (304) can input liquid to flush the filter chamber (301) and output it to the second flow channel (103) through the first flushing outlet (305).

2. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 1, characterized in that, The wastewater separation assembly (3) includes a filter cylinder (31), a filter element assembly (32), a first valve body (33), a second valve body (34), and a third valve body (35). The filter cylinder (31) is mounted on the rotary drive assembly (2). The filter cylinder (31) has a filter chamber (301). The filter cylinder (31) has an installation opening (302), a filtered water outlet (303), a flushing inlet (304), and a first flushing outlet (305). The filter element assembly (32) is detachably mounted on the filter cylinder (31) and located inside the filter chamber (301). The filter element assembly (32) has a first spray hole (3201). The wastewater inlet (401) and the filter chamber (301) are also connected. The filter cartridge (31) is connected to the filtered water outlet (303) in sequence, the flushing inlet (304) is connected to the filter element assembly (32), the first spray hole (3201), the filter chamber (301) and the first flushing outlet (305) of the filter element assembly (32) are connected in sequence, the first valve body (33), the second valve body (34) and the third valve body (35) are disposed on the filter cartridge (31), the first valve body (33), the second valve body (34) and the third valve body (35) are respectively located at the filtered water outlet (303), the flushing inlet (304) and the first flushing outlet (305), and the end of the second valve body (34) away from the flushing inlet (304) is used to connect to the high pressure liquid source.

3. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 2, characterized in that, The filter element assembly (32) includes a support base (321), a first backflow pipe (322), and a first filter plate (323). The support base (321) is detachably mounted and has a first flow channel. The flushing inlet (304) communicates with the first flow channel. The first backflow pipe (322) has a plurality of first nozzles (3201). The first backflow pipe (323) has a second flow channel, which communicates with the plurality of first nozzles (3201). The plurality of first nozzles (3201) are filtered through the second flow channel. The flow channel is connected to the first flow channel. The first filter plate (323) is disposed on the support base (321). The first filter plate (323) is adjacent to the first backflow pipe (322). The first backflow pipe (322) is used to clean the first filter plate (323). The first backflow pipe (322), the first filter plate (323), and the first flushing outlet (305) are arranged accordingly. The sewage inlet (401), the first filter plate (323), the first backflow pipe (322), and the filtered water outlet (303) are arranged accordingly.

4. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 3, characterized in that, The installation opening (302) and the filtered water outlet (303) are located at both ends of the filter cylinder (31), and the flushing inlet (304) and the first flushing outlet (305) are located on the side wall of the filter cylinder (31). And / or the support base (321) includes a support ring (3211) and a support tube (3212). The filter cylinder (31) is provided with a plurality of support ribs (311) at one end near the filtered water outlet (303). The plurality of support ribs (311) are spaced apart. The support ring (3211) is detachably supported on the plurality of support ribs (311). The support tube (3212) is provided on the support ring (3211). The support tube (3212) is provided with the first flow passage. The first back spray pipe (322) and the first filter plate (323) are provided on the support tube (3212). And / or the first back jet pipe (322) includes a supporting inner ring (3221), a water outlet branch pipe (3222), and a reinforcing ring (3223). The supporting inner ring (3221) is disposed on the supporting base (321). The water outlet branch pipe (3222) is provided with a plurality of first spray holes (3201). The number of water outlet branch pipes (3222) is multiple. The plurality of water outlet branch pipes (3222) are spaced apart on the supporting inner ring (3221). The reinforcing ring (3223) is disposed on the plurality of water outlet branch pipes (3222) and is located at the end of the water outlet branch pipe (3222) away from the supporting inner ring (3221).

5. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 3, characterized in that, The filter element assembly (32) further includes a connecting rod (324), a second reverse nozzle (325), and a second filter plate (326). The connecting rod (324) is detachably mounted on the support base (321). The connecting rod (324) has a third flow channel, which communicates with the first flow channel. The second reverse nozzle (325) is mounted on the connecting rod (324) and has a fourth flow channel. The second reverse nozzle (325) has multiple second nozzle holes (3202). The second filter plate (326) is provided with... The filter cylinder (31) is placed on the connecting rod (324) and adjacent to the second backflow nozzle (325). The filter cylinder (31) also has a second flushing outlet (306). The second flushing outlet (306) is located between the mounting opening (302) and the second filter plate (326). The sewage separation assembly (3) also includes a fourth valve body (36). The fourth valve body (36) is placed on the filter cylinder (31) and located at the second flushing outlet (306). The second flushing outlet (306) can communicate with the second flow channel (103) through the fourth valve body (36).

6. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 1, characterized in that, The rotary drive assembly (2) includes a motor mounting bracket (21), a drive motor (22), a support chassis (23), ball bearings (24), and a rotating top plate (25). The motor mounting bracket (21) is mounted on the sewage grading tank (1) and located in the positioning installation area (101). The drive motor (22) is mounted on the motor mounting bracket (21). The support chassis (23) is mounted on the mounting bracket (21). The rotating top plate (25) is connected to the drive motor (22) in a transmission manner. The rotating top plate (25) is rotatably mounted on the support chassis (23). A limiting groove (201) is provided between the rotating top plate (25) and the support chassis (23). There are multiple ball bearings (24). The multiple ball bearings (24) are located in the limiting groove (201) and supported between the rotating top plate (25) and the support chassis (23).

7. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 1, characterized in that, The lifting cover assembly (4) includes a support frame (41), a lifting motor (42), a lifting rod (43), and a cover plate (44). The support frame (41) is adjacent to the sewage grading tank (1). The lifting motor (42) is mounted on the support frame (41). The lifting rod (43) is mounted on the lifting motor (42). The cover plate (44) is mounted on the lifting rod (43). The cover plate (44) is provided with the sewage inlet (401). The cover plate (44) can open or close the installation opening (302) of the sewage separation assembly (3).

8. The solid-liquid separation device based on the front end of aquaculture wastewater treatment according to claim 7, characterized in that, The second flow channel (103) surrounds the positioning and mounting area (101), and the first flow channel (102) surrounds the second flow channel (103). And / or the sewage separation component (3) is also provided with a sealing groove, the sealing groove being located at one end of the sewage separation component (3) facing the cover plate (44), and also includes a sealing ring (5), the sealing ring (5) being disposed on the sewage separation component (3) and located at the sealing groove, the sealing ring (5) being sandwiched between the sewage separation component (3) and the cover plate (44) when the lifting cover assembly (4) closes the installation opening (302).

9. A solid-liquid separation method based on the front end of aquaculture wastewater treatment, characterized in that, The solid-liquid separation method based on the front end of aquaculture wastewater treatment is used to control the solid-liquid separation device based on the front end of aquaculture wastewater treatment as described in any one of claims 1 to 8, characterized in that the method includes the following steps: S1: Start the rotary drive assembly (2) to rotate one of the multiple sewage separation assemblies (3) to a preset position. After the sewage separation assembly (3) moves to the preset position, start the lifting cover assembly (4) to seal the installation opening (302) of the sewage separation assembly (3) that has moved to the preset position. S2: The sewage to be filtered is input into the filter chamber (301) through the sewage inlet (401) of the lifting cover assembly (4), and the filtered sewage is discharged into the first flow channel (102) through the filtered water outlet (303). The flow rate and water quality of the outlet of the first flow channel (102) are monitored. When the flow rate and water quality of the liquid output from the first flow channel (102) are lower than the set value, the sewage to be filtered is input into the filter chamber (301) is stopped, and the filtered water outlet (303) is closed at the same time. S3: Open the flushing inlet (304), and input high-pressure water into the sewage separation component (3) through the flushing inlet (304). Perform reverse flushing with high-pressure water, and at the same time open the first flushing outlet (305) to discharge the sewage after flushing the sewage separation component (3) into the second flow channel (103). After the preset flushing time, close the flushing inlet (304) and the first flushing outlet (305), and at the same time open the filtered water outlet (303).

10. The solid-liquid separation method based on the front end of aquaculture wastewater treatment according to claim 9, characterized in that, The following steps are included before step S3: Start the lifting cover assembly (4) to open the installation opening (302) of the sewage separation assembly (3), start the rotary drive assembly (2) to rotate the sewage separation assembly (3) that closed the filter water outlet (303) in step S2 to the position to be cleaned, and at the same time, with the movement of the rotary drive assembly (2), rotate another sewage separation assembly (3) to be opposite to the lifting cover assembly (4), and input the sewage to be filtered into the filter chamber (301) through the sewage inlet (401) for recirculation filtration.

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