An ecological fishery breeding system sewage circulating treatment device

Abstract

The application discloses an ecological fishery breeding system sewage circulating treatment device, and relates to the technical field of sewage treatment.The device comprises a separation tank, a horizontal partition plate is arranged in the separation tank, and the inside of the separation tank is divided into an upper stirring chamber and a lower sedimentation chamber; a stirring mechanism is arranged in the stirring chamber, and the stirring mechanism comprises a vertically arranged stirring shaft and stirring blades arranged on the stirring shaft; the top end of the stirring shaft penetrates through the top of the tank and is connected with a driving mechanism; the bottom end of the stirring shaft penetrates through the horizontal partition plate and is rotationally connected with the horizontal partition plate; a wastewater inlet and a flocculant adding port are arranged on the top of the separation tank and are communicated with the stirring chamber; and the separation tank further comprises a drainage mechanism, which is arranged on the stirring shaft.The ecological fishery breeding system sewage circulating treatment device can promote chemical flocculation through physical stirring, can utilize an independent static space for physical sedimentation, and can automatically connect the two stages through centrifugal force, so that the efficient cooperation of physical and chemical multistage treatment is realized.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater recycling treatment device for an ecological aquaculture system. Background Technology

[0002] In the process of ecological aquaculture, aquaculture wastewater rich in organic matter, suspended solids, and nutrients is generated. Direct discharge of this wastewater will pollute the aquatic environment. To achieve sustainable use of water resources, flocculation sedimentation is often used for treatment. This involves adding flocculants to coagulate fine suspended particles and colloidal substances in the wastewater into larger flocs, which are then separated into solids and liquids by gravity settling, resulting in relatively clear water. This is a core step in an economical and effective physicochemical treatment process in this field.

[0003] Existing technologies, traditional flocculation sedimentation treatment devices and processes have significant limitations. For example, a high-efficiency flocculation sedimentation device for concrete wastewater, as described in application number 202111264557.2, is similar to most devices in that it places mixing and settling in the same chamber. Components such as the stirring shaft and blades can obstruct water flow and interfere with the free settling of flocs during the sedimentation stage, affecting the separation effect. Furthermore, traditional operating sequences and process connections have shortcomings. For instance, adding water before starting mixing can easily lead to uneven mixing of reagents, and transferring the mixed liquid to the sedimentation zone after mixing often requires additional valves or power. The process is not coherent and has a low degree of automation, which restricts treatment efficiency and system stability.

[0004] Therefore, there are still shortcomings and deficiencies in the existing technology. How to provide a wastewater recycling treatment device for an ecological aquaculture system is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater recycling treatment device for an ecological aquaculture system, which solves the technical problems of existing ecological aquaculture wastewater flocculation and sedimentation treatment devices, which suffer from interference in the sedimentation process and low degree of automation due to the overlapping of mixing and sedimentation functions and the reliance on external control for process switching.

[0006] To achieve the above objectives, the present invention provides a wastewater recycling treatment device for an ecological aquaculture system, including a separation tank. The separation tank is provided with a horizontal partition, which divides the interior into an upper stirring chamber and a lower sedimentation chamber. The mixing chamber is equipped with a mixing mechanism, which includes a vertically arranged mixing shaft and mixing blades mounted on it. The top end of the mixing shaft passes through the top of the tank and connects to the drive mechanism, and the bottom end passes through the horizontal partition and is rotatably connected to it. The top of the separator is equipped with a wastewater inlet and a flocculant dosing port that are connected to the mixing chamber; The separator also includes a drainage mechanism, which is mounted on the stirring shaft and is used to close when the stirring shaft rotates and automatically open when the stirring shaft stops, so as to connect the stirring chamber and the sedimentation chamber.

[0007] Preferably, the drive mechanism includes a drive motor, which is connected to the top of the stirring shaft via a belt drive mechanism.

[0008] Preferably, the top end of the stirring shaft is connected to the top plate of the tank via a bearing, and the bottom end of the stirring shaft is connected to the horizontal partition via a bearing.

[0009] Preferably, the drainage mechanism is applied to the upper and lower chambers of the separation tank, which includes a hollow stirring shaft with an axially penetrating inner hole and at least one set of radially penetrating outer grooves on its outer wall. The drainage mechanism also includes an inner tube and a drive unit. The inner tube is slidably inserted into the inner hole of the stirring shaft, and its outer wall is provided with an inner groove group corresponding to the outer groove group. The drive unit is located at the top of the stirring shaft and connected to the inner tube. It is used to drive the inner tube to move axially when the stirring shaft rotates, so that the inner and outer troughs are misaligned to close the drainage channel. When the stirring shaft stops, it drives the inner tube to reset, so that the inner and outer troughs are aligned to open the drainage channel.

[0010] Preferably, the top of the inner tube is fixed with a plug shaft, which extends upwards from the stirring shaft and is connected to the drive unit. The plug shaft and the top of the stirring shaft are connected by a spline to achieve circumferential synchronization and axial sliding.

[0011] Preferably, the drive unit includes a central shaft, a hinge seat, a rotating rod, a gravity ball, a longitudinal sleeve, a connecting rod, a return spring, and an upward lifting rod; The central shaft is fixed coaxially to the top of the stirring shaft, the hinge seat is fixed to the top of the central shaft, the rotating rod is symmetrically hinged to both sides of the hinge seat, and the gravity ball is fixed to the end of the rotating rod; The longitudinal sleeve is slidably fitted onto the central shaft, and the two ends of the connecting rod are respectively hinged to the rotating rod and the longitudinal sleeve. The return spring is fitted onto the central shaft and acts on the longitudinal sleeve. One end of the lifting rod is connected to the longitudinal sleeve, and the other end passes through the relief groove on the stirring shaft wall and is connected to the inner tube.

[0012] Preferably, the portion of the lifting rod that passes through the relief groove slides into the groove wall, and the length of the relief groove is used to limit the axial movement of the inner tube.

[0013] Preferably, both the outer and inner groove groups include multiple annular arrays of through grooves arranged at axial intervals.

[0014] Preferably, a dynamic seal is provided between the outer wall of the inner tube and the inner wall of the stirring shaft.

[0015] A method for treating wastewater from an ecological aquaculture system using a wastewater recycling treatment device includes the following steps: Step 1: Start the drive mechanism to make the stirring shaft rotate at high speed in the stirring chamber. The centrifugal force generated by the rotation of the stirring shaft triggers the drainage mechanism to close, thus isolating the stirring chamber from the sedimentation chamber. Step 2: In the turbulent flow field created by the continuous rotation of the stirring shaft, the wastewater to be treated and the flocculant are simultaneously injected into the stirring chamber to carry out mixing and flocculation reaction; Step 3: After the mixing reaction is complete, stop stirring, the stirring shaft stops rotating, the centrifugal force disappears, and the drainage mechanism automatically opens, connecting the stirring chamber and the sedimentation chamber. Step 4: The wastewater that has been mixed in the mixing chamber flows into the sedimentation chamber under the action of gravity through the drainage mechanism; Step 5: The wastewater is allowed to settle in the sedimentation chamber to achieve solid-liquid separation.

[0016] The present invention has the following advantages: (1) Compared with the above-mentioned background technology, the wastewater recycling treatment device for an ecological aquaculture system provided by the present invention completely separates the stirring and sedimentation processes in space through a horizontal partition, and uses the centrifugal force generated by the rotation of the stirring shaft as a control signal to drive the drainage mechanism. This effectively solves the problem of physical interference of the stirring component with the settling of flocs during the sedimentation stage in traditional devices. When the stirring shaft is working, the drainage mechanism automatically closes under the action of centrifugal force, ensuring that the mixing reaction takes place in an independent stirring chamber; once the stirring stops, the drainage mechanism automatically opens, allowing the mixed liquid to flow into the sedimentation chamber by gravity. This allows the sedimentation process to take place in a completely still environment without any internal obstruction, allowing the flocs to settle freely and fully, thereby improving the efficiency of solid-liquid separation and the clarity and stability of the effluent.

[0017] (2) Compared with the above-mentioned background technology, the wastewater recycling treatment device for an ecological aquaculture system provided by the present invention achieves automation and high efficiency in the treatment process by combining the optimized operation sequence of "first starting the stirring to form a flow field, then adding wastewater and chemicals" with the drainage mechanism. This sequence ensures that the chemicals are fully dispersed and mixed instantly upon entry, avoiding excessively high local concentrations and improving the flocculation effect and chemical utilization rate. The entire "mixing, transferring, and settling" process requires no additional power or manual intervention and can be completed automatically and continuously under the start-stop control of a single drive source (drive motor). This simplifies the operation steps and improves the automation level, operational continuity, and treatment reliability of the entire wastewater treatment system. Attached Figure Description

[0018] 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the invention and the internal structure of the tank. Figure 2 This is a schematic diagram of the drive mechanism structure of the present invention; Figure 3 This is a schematic diagram of the stirring shaft and drive unit structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the stirring shaft of the present invention; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point C; Figure 6 For the present invention Figure 4 A magnified schematic diagram of the structure at point D; Figure 7 For the present invention Figure 2 A magnified schematic diagram of the structure at point A; Figure 8 For the present invention Figure 3 A magnified schematic diagram of the structure at point B; Figure 9 This is a schematic diagram of the drainage channel closure according to the present invention.

[0020] In the diagram: 1. Separation tank; 2. Inlet; 3. Stirring mechanism; 4. Drive mechanism; 5. Baffle; 6. Stirring chamber; 7. Sedimentation chamber; 8. Drainage mechanism; 9. Inner bore; 10. Dynamic seal; 11. Connecting frame; 12. End cap; 13. Return spring; 14. Relief groove; 301. Stirring shaft; 302. Stirring blades; 801. Drive unit; 802. Drainage unit; 8021. Inner pipe; 8022. Drainage tube. Water channel; 8023, insert shaft; 8221, outer groove assembly; 8222, inner groove assembly; 401, mounting bracket; 402, transmission assembly; 403, drive motor; 8011, central shaft; 8012, hinge seat; 8013, longitudinal sliding sleeve; 8014, rotating rod; 8015, connecting rod; 8016, gravity ball; 8017, lifting rod; 1101, disc body; 1102, support rod; 1103, through hole. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] This invention provides a wastewater recycling treatment device for an ecological aquaculture system. It promotes chemical flocculation through physical stirring, then uses an independent static space for physical sedimentation, and automatically connects the two stages through centrifugal force, achieving efficient synergy of multi-stage physical and chemical treatment. It can also solve the problems of existing flocculation and sedimentation treatment devices for ecological aquaculture wastewater, which suffer from interference in the sedimentation process and low degree of automation due to overlapping mixing and sedimentation functional spaces and reliance on external control for process switching.

[0024] Please refer to this as well. Figures 1 to 9 The present invention provides a wastewater recycling treatment device for an ecological aquaculture system, comprising a separation tank 1. For example... Figure 1 As shown, the top outer wall of the separator 1 is equipped with a wastewater inlet 2 and a flocculant dosing port, which are used to introduce the aquaculture wastewater to be treated and the flocculant into the tank, respectively. A stirring mechanism 3 is installed inside the separator 1, driven by a drive mechanism 4 on the top of the tank, enabling rotary stirring. Its basic working process is as follows: First, the stirring mechanism 3 is started, causing the stirring shaft 301 to rotate at high speed. Then, the aquaculture wastewater is injected through the inlet 2, and an appropriate amount of flocculant is added through the dosing port. After the wastewater and flocculant enter the separator 1, the high-speed rotating stirring mechanism 3 disperses and mixes them thoroughly, forming a flocculation reaction. After the stirring process is completed, stirring is stopped, allowing the mixed wastewater to settle in the tank. At this time, the solid pollutants generated by flocculation gradually settle and accumulate at the bottom of the tank, thus completing the physicochemical flocculation and sedimentation treatment of the wastewater.

[0025] In practice, traditional designs typically place the stirring mechanism 3 directly inside the sedimentation zone. After stirring is complete, stirring is stopped, and the mixture is allowed to settle directly within the same chamber. However, this layout has significant shortcomings. The main reason is that the stirring mechanism 3 and its components remain within the sedimentation chamber 7 during the sedimentation stage, which interferes with the settling process of the flocs. Specifically, components such as the stirring shaft 301 and stirring blades 302 obstruct the path of the flocs during settling, easily causing the flocs to adhere to the surface of the components or form eddies around them, thus affecting the free settling of the floc particles. In addition, the stationary stirring components also change the flow pattern within the sedimentation zone, making the local water flow unstable, further interfering with the sedimentation effect, reducing the solid-liquid separation efficiency, and potentially causing the sediment to resuspend, affecting the quality of the effluent.

[0026] To solve the above problems, such as Figure 1 As shown, in this embodiment, a horizontal partition 5 is installed inside the separation tank 1, dividing the tank cavity into two independent chambers. The upper chamber serves as the stirring chamber 6, housing the stirring mechanism 3 specifically for mixing wastewater and flocculant. The lower chamber serves as the sedimentation chamber 7, used for allowing the flocculated mixture to settle and settle. After the stirring process is complete, the uniformly mixed wastewater in the stirring chamber 6 is smoothly discharged into the lower sedimentation chamber 7, thus achieving complete spatial separation of the stirring and sedimentation processes. This design effectively avoids interference from the stirring mechanism 3 during sedimentation, improving sedimentation efficiency and effluent clarity, resulting in a more stable and reliable wastewater flocculation treatment effect.

[0027] like Figures 1-2 As shown, the core components of the stirring mechanism 3 include a stirring shaft 301 and stirring blades 302. The stirring shaft 301, as a key transmission component, vertically penetrates the center of the stirring chamber 6 of the separation tank 1. Its top end is connected to the tank top plate via a bearing structure, allowing for flexible rotation; its bottom end extends downwards, rotatably connecting to the partition 5 separating the stirring chamber 6 and the settling chamber 7 via bearings, thus forming a stable support structure at both ends. Multiple sets of stirring blades 302 are fixedly installed along the axial direction of the stirring shaft 301 at certain intervals, thereby generating sufficient shearing and stirring action on the liquid during rotation. The upper end of the stirring shaft 301 passes through the tank top plate and is connected to the drive motor 403 for transmission. A high-performance rotary seal is installed at the shaft penetration point to ensure dynamic sealing during the stirring process and prevent leakage. Correspondingly, the bottom end of the stirring shaft 301, extending through the partition 5 and down to the lower settling chamber 7, is also equipped with a reliable rotary seal 10, thus ensuring free rotation of the shaft while tightly separating the upper and lower functional chambers.

[0028] In traditional operating procedures, injecting stagnant wastewater first and then starting agitation introduces a series of efficiency and effectiveness problems. Specifically, when flocculant is added to stagnant wastewater, it tends to settle or aggregate near the injection point, forming localized high-concentration areas. After agitation begins, additional energy and time are required to break up these unevenly concentrated clumps, resulting in a significant delay and uneven mixing process. This not only prolongs the time required to reach complete mixing and increases unnecessary energy consumption, but may also lead to a "colloidal protection" phenomenon due to excessively high local flocculant concentrations. In this case, excessive flocculant can actually keep colloidal particles stable, making them difficult to aggregate and settle, resulting in wasted flocculant. Ultimately, this affects the overall sedimentation effect and the stability of the effluent quality.

[0029] To address the aforementioned issues, this embodiment employs a more rational operating sequence: first, the stirring mechanism 3 is activated, and once it reaches the predetermined rotation speed and forms a stable and sufficient turbulent flow field within the stirring chamber 6, wastewater is injected and flocculant is added simultaneously. In this state, the wastewater and flocculant entering the tank are instantly captured and dispersed by the high-speed rotating flow field, rapidly spreading throughout the entire stirring area, thus achieving rapid and uniform mixing from the initial addition. This operation effectively avoids localized accumulation of the flocculant or the occurrence of "colloidal protection," and also prevents undissolved flocculant clumps from directly settling to the bottom, ensuring that each portion of flocculant can fully contact the suspended particles in the wastewater, significantly improving the speed and thoroughness of the flocculation reaction, and contributing to the formation of dense, uniform, and easily settling flocs. Furthermore, this optimized sequence fully utilizes the mixing potential of the existing stirring mechanism 3, eliminating the need for additional dedicated mixing equipment, simplifying the system structure, and reducing construction and operating costs.

[0030] Although this embodiment achieves spatial separation of stirring and sedimentation by setting up baffle 5, effectively avoiding interference from the stirring component to the sedimentation process, there is still room for optimization in terms of the continuity of the process flow. Specifically, after the stirring process is completed, valves need to be opened manually or automatically, and power equipment such as water pumps may be required to transfer the mixed wastewater in the stirring chamber 6 to the sedimentation chamber 7 below. This transfer step increases the number of operational steps, making the treatment process less continuous and convenient, and also affecting the overall automation level and operating efficiency to some extent. Therefore, it is necessary to further simplify and automate this transfer process to achieve a smoother and more efficient connection between stirring and sedimentation.

[0031] To optimize the operation process and improve the system's automation level, this embodiment specifically includes an automatic drainage mechanism 8 based on centrifugal force control. Its core purpose is to enable the mixed wastewater in the mixing chamber 6 to automatically drain into the sedimentation chamber 7 below after the mixing process is completed, without manual intervention. This mechanism utilizes the centrifugal force generated by the high-speed rotation of the mixing shaft 301 as a control signal: when the mixing shaft 301 rotates at high speed, the drainage mechanism 8 remains closed under the action of centrifugal force, thus ensuring that the mixing chamber 6 and the sedimentation chamber 7 are isolated from each other, providing an independent space for the mixing reaction; once the mixing process ends and the mixing shaft 301 stops rotating, the centrifugal force disappears, and the drainage mechanism 8 automatically opens under a preset mechanism. At this time, the mixed wastewater in the mixing chamber 6 can smoothly flow into the sedimentation chamber 7 under gravity. Thus, while maintaining the core advantage of spatial separation between the mixing and sedimentation stages, the problem of mixed wastewater transfer is solved. This not only achieves automatic connection between processes but also eliminates the need for additional power-driven components or on-site operator intervention, further simplifying operation and improving the system's continuous operation efficiency and automation level.

[0032] Specifically, such as Figures 1-5 As shown, the automatic drainage mechanism 8 mainly consists of two parts: a drive unit 801 and a drainage unit 802, whose structure is closely integrated with the stirring shaft 301. Firstly, the stirring shaft 301 in this embodiment is specifically designed as a hollow structure. The inner cavity of this hollow stirring shaft 301 extends downwards along its axial direction, forming a continuous central channel. The main body of the drainage unit 802 is located within this axial inner hole 9, responsible for performing the final opening, closing, and drainage actions. The drive unit 801, as the control core, is located at the top of the stirring shaft 301, adjacent to the drive motor 403. Its working principle is as follows: the drive unit 801 can respond to the rotation state of the stirring shaft 301 and convert the change in physical state (such as centrifugal force) into control commands, which are then transmitted to the drainage unit 802 located inside the shaft core, instructing it to open or close, thereby achieving automatic control over whether the two chambers are connected.

[0033] like Figures 3-6As shown, the drainage unit 802 is mainly composed of core components such as the inner tube 8021, the drainage channel 8022, and the insertion shaft 8023. The inner tube 8021, as a movable component, is slidably inserted into the axial inner hole 9 of the hollow stirring shaft 301. Its outer wall precisely fits the inner wall of the inner hole 9, providing guidance and sealing for axial sliding. The bottom end of the inner tube 8021 is flush with the bottom end of the stirring shaft 301, both extending to the top region of the sedimentation chamber 7. The drainage channel 8022 is the core structure connecting the two chambers, and its location is at the bottom of the stirring chamber 6. Specifically, multiple sets of through grooves are radially formed on the outer wall of the stirring shaft 301 and the wall of the inner tube 8021, together forming the drainage channel 8022. The portion formed on the outer wall of the stirring shaft 301 is called the outer groove group 8221. It consists of multiple through grooves equidistantly arranged in a ring array along the circumference of the stirring shaft 301, and these through grooves radially penetrate the wall of the stirring shaft 301. Correspondingly, the portion formed on the wall of the inner tube 8021 is called the inner groove group 8222. Its structure is the same as that of the outer groove group 8221, consisting of multiple through grooves arranged in a ring array and radially penetrating the wall of the inner tube 8021. The ring array angles of the inner groove group 8222 and the outer groove group 8221 are exactly the same to ensure perfect alignment at specific positions. To increase the drainage area and ensure smooth flow, at least two sets of both the outer groove group 8221 and the inner groove group 8222 are arranged equidistantly along the axial direction of the stirring shaft 301 (or the inner tube 8021). The axial distance between two adjacent sets of slots is configured such that its value is greater than the opening height of a single through slot, thereby ensuring that the inner tube 8021 can achieve complete alignment or complete misalignment of the through slots when moving axially, thus controlling the opening and closing of the channel.

[0034] The opening and closing control of the drainage channel 8022 relies on the precise axial displacement of the inner tube 8021 relative to the stirring shaft 301. Initially or normally, the inner tube 8021 is held in a specific position by elasticity, ensuring that the inner groove group 8222 on the outer wall of the inner tube 8021 is completely aligned and interconnected with the outer groove group 8221 on the outer wall of the stirring shaft 301. At this time, the drainage channel 8022 is open, and the stirring chamber 6 and sedimentation chamber 7 are connected through these aligned grooves, allowing the mixed wastewater to flow. When it is necessary to close the channel and isolate the two chambers, the drive unit 801 controls the inner tube 8021 to slide a preset distance along the axis of the stirring shaft 301. This movement causes the inner groove group 8222 and the outer groove group 8221 to be completely misaligned axially. At this time, as... Figure 9 As shown, the complete and smooth wall of the inner tube 8021 covers and seals the outer groove on the stirring shaft 301, thereby cutting off the flow path and achieving a sealed closure. This setting, which aligns or misaligns the groove group through axial sliding, enables reliable and linear mechanical opening and closing of the drainage channel 8022.

[0035] To ensure the sealing reliability of the drainage channel 8022 in the closed state and prevent sewage leakage from the sliding fit gap between the inner pipe 8021 and the inner hole 9 of the stirring shaft 301, such as Figure 6 As shown, multiple dynamic seals 10 are provided in key areas. These seals (such as O-rings or Glyd rings) are precisely arranged between the outer wall of the inner tube 8021 and the inner hole 9 of the stirring shaft 301, forming multiple reliable sliding sealing pairs.

[0036] In addition, such as Figures 3-5 ,as well as Figure 8 As shown, the top of the inner tube 8021 is a closed end, and a certain axial clearance is maintained between its closed end face and the inner wall of the top end of the inner hole 9 of the stirring shaft 301, providing necessary space for the inner tube 8021 to slide up and down. The insert shaft 8023, as a key connecting and transmission component, is coaxially fixed at the center of the top end of the inner tube 8021. The insert shaft 8023 extends upwards, passes through the opening at the top of the stirring shaft 301, extends above the stirring shaft 301, and connects to the drive unit 801. To ensure complete synchronization between the inner tube 8021 and the stirring shaft 301 in the circumferential (rotational) direction, and to prevent misalignment of the groove assembly or uneven wear of the seals due to relative rotation, the insert shaft 8023 and the top of the stirring shaft 301 are connected by a spline connection. Specifically, the insert shaft 8023 itself is machined as an external spline structure, while a corresponding internal spline keyway is machined in the hole at the top end of the stirring shaft 301 that mates with it. This spline fit rigidly locks the inner tube 8021 and the stirring shaft 301 in the circumferential direction, forcing them to rotate synchronously and avoiding the possibility of relative rotation, while at the same time preserving the independent axial movement freedom required by the inner tube 8021.

[0037] like Figures 1-3 , Figure 5 , Figure 7 as well as Figure 8 As shown, the drive unit 801 is located at the top of the stirring shaft 301 and is connected to the insert shaft 8023. Its core function is to use the centrifugal force generated by the high-speed rotation of the stirring shaft 301 as a power source to automatically control the opening and closing of the drainage channel 8022. Its working principle is as follows: when the stirring shaft 301 drives the drive unit 801 to rotate at high speed, the generated centrifugal force pulls the insert shaft 8023 upward. The upward movement of the insert shaft 8023 causes the inner tube 8021 inside the stirring shaft 301 to move upward synchronously, causing the through groove on the wall of the inner tube 8021 to be axially misaligned with the through groove on the wall of the stirring shaft 301, thereby achieving mechanical closure of the drainage channel 8022. When stirring stops and the centrifugal force disappears, the inner tube 8021 moves downward, causing the inner and outer through grooves to realign, and the drainage channel 8022 reopens.

[0038] like Figures 1-2As shown, the drive mechanism 4 mainly consists of a mounting frame 401 and a transmission assembly 402, providing stable support and power transmission for the entire stirring and drive system. The mounting frame 401 is firmly fixed to the top of the separation tank 1. The top end of the stirring shaft 301 passes through the mounting frame 401 and is rotatably connected to it via bearings, ensuring that the stirring shaft 301 can rotate smoothly even under radial and axial loads. The section of the stirring shaft 301 located above the mounting frame 401 is connected to the output shaft of the drive motor 403 via a belt drive mechanism. The drive motor 403 is typically mounted on the side of the top of the separation tank 1, and through the flexible transmission of the belt, the rotational power of the motor is efficiently and smoothly transmitted to the stirring shaft 301.

[0039] like Figures 1-3 , Figure 5 , Figure 7 as well as Figure 8 As shown, the specific structure of the drive unit 801 includes key components such as a central shaft 8011, a hinge seat 8012, a longitudinal sliding sleeve 8013, a rotating rod 8014, a connecting rod 8015, a gravity ball 8016, and an upward lifting rod 8017. The central shaft 8011 is coaxially fixed to the top end of the stirring shaft 301 through a hollow connecting frame 11, ensuring that the rotation of the stirring shaft 301 can drive the central shaft 8011 to rotate synchronously without lag.

[0040] The connecting frame 11 typically consists of two upper and lower discs 1101 and several circumferentially distributed support rods 1102. A through hole 1103 is located at the center of the lower disc 1101. A limiting cap 12 is provided on the insertion shaft 8023 at the top of the inner tube 8021 inside the stirring shaft 301. The outer diameter of this cap 12 is smaller than the inner diameter of the through hole 1103 in the lower disc 1101 of the connecting frame 11, thus allowing space for the upward movement of the inner tube 8021 and the insertion shaft 8023. The central shaft 8011 is concentrically fixed to the upper disc 1101 of the connecting frame 11. A hinge seat 8012 is fixedly sleeved on the top of the central shaft 8011. Two rotatable rotating rods 8014 are symmetrically hinged to both sides of the hinge seat 8012, and a gravity ball 8016 made of heavy metal is fixed to the end of each rotating rod 8014. A longitudinal sleeve 8013 is slidably fitted onto the outside of the central shaft 8011 and located below the hinge seat 8012. Each rotating rod 8014, near the gravity ball 8016, is also hinged to a connecting rod 8015 via a U-shaped connecting block. The other end of the connecting rod 8015 is hinged to the corresponding part of the longitudinal sleeve 8013, thus converting the oscillation of the rotating rod 8014 into the vertical linear motion of the longitudinal sleeve 8013. A return spring 13 is also fitted onto the outside of the central shaft 8011 between the hinge seat 8012 and the longitudinal sleeve 8013, providing power for the system's reset. The outer wall of the longitudinal sleeve 8013 is fixed to the top of the inner tube 8021 inside the stirring shaft 301 via an upward lifting rod 8017, thus directly transmitting its vertical movement to the inner tube 8021.

[0041] To achieve motion transmission between the longitudinal sleeve 8013 and the inner tube 8021, a long, narrow relief groove 14 extending along the axial direction is symmetrically machined at the top of the stirring shaft 301. This groove communicates with the inner hole 9 of the stirring shaft 301. The top transverse portion of the lifting rod 8017 is fixedly connected to the outer wall of the longitudinal sleeve 8013, while its bottom transverse portion passes downward through the long, narrow relief groove 14 and is finally fixed to the outer wall of the inner tube 8021 located inside the inner hole 9 of the stirring shaft 301. This transforms the longitudinal (up and down) sliding of the longitudinal sleeve 8013 on the central shaft 8011 in the driving unit 801 into the longitudinal movement of the inner tube 8021 in the same direction within the stirring shaft 301. When the stirring shaft 301 rotates at high speed, the gravity ball 8016 swings outward under centrifugal force. Through the linkage mechanism composed of the rotating rod 8014 and the connecting rod 8015, the longitudinal sliding sleeve 8013 is pulled upward against the elastic force of the return spring 13. The upward movement of the longitudinal sliding sleeve 8013, in turn, pulls the inner tube 8021 upward within the stirring shaft 301 via the lifting rod 8017, thus closing the drainage channel 8022. When stirring stops and the centrifugal force decreases, the return spring 13 pushes the longitudinal sliding sleeve 8013 downward, thereby causing the inner tube 8021 to move downward and reset, automatically opening the drainage channel 8022. The entire control process is highly responsive and reliably achieves automatic synchronization between the opening / closing action and the stirring state.

[0042] It should be noted that the maximum upward travel of the inner tube 8021 can be controlled by the length of the elongated relief groove 14. When the stirring shaft 301 rotates at high speed and the drive unit 801 operates, the lifting rod 8017 rises together with the longitudinal sleeve 8013. Once the lateral portion of the lifting rod 8017 moves to contact the inner wall of the top of the relief groove 14, the mechanical limit point is reached. At this time, the inner tube 8021 has been raised to the preset highest position, and the inner through groove on its tube wall is completely misaligned axially with the outer through groove on the wall of the stirring shaft 301. The drainage channel 8022 is reliably sealed, thereby ensuring that the stirring chamber 6 and the sedimentation chamber 7 are completely isolated during the stirring stage.

[0043] In summary, the system achieves a highly automated operating cycle through the aforementioned complete drainage mechanism 8. During wastewater separation treatment, the drive motor 403 is first started. The motor power drives the stirring shaft 301 and its top central shaft 8011 to rotate at high speed via belt transmission. The centrifugal force generated by the rotation acts on the gravity ball 8016, causing it to swing outwards. This swing is converted into an upward pulling force on the longitudinal sleeve 8013 through a linkage mechanism consisting of the rotating rod 8014 and the connecting rod 8015. This pulling force overcomes the elasticity of the return spring 13, pushing the longitudinal sleeve 8013 and its rigidly connected lifting rod 8017 and inner tube 8021 upwards as a whole until the drainage channel 8022 is completely closed. Subsequently, following the optimized sequence of "stirring first, then adding," wastewater is injected into the already turbulent stirring chamber 6, and flocculant is added. The high-speed rotating stirring blades 302 instantly disperse and fully mix the incoming water and the agent. After the stirring process is fully completed, the drive motor 403 is turned off, and the stirring shaft 301 gradually stops rotating. As centrifugal force disappears, the gravity ball 8016 naturally droops and returns to its original position under its own weight. Simultaneously, the compressed return spring 13 releases its stored elasticity, jointly pushing the longitudinal sleeve 8013 downwards. During its downward movement, the inner tube 8021 is mechanically limited by the end cap 12 at the top of the insertion shaft 8023, eventually stopping at a preset position. At this point, the inner tube 8021 is fully aligned with the through groove on the stirring shaft 301, and the drainage channel 8022 opens. The wastewater that has been mixed in the stirring chamber 6 then automatically flows into the sedimentation chamber 7 below through the drainage channel 8022 under gravity, entering the settling stage.

[0044] A method for treating wastewater from an ecological aquaculture system using a wastewater recycling treatment device includes the following steps: Step 1: The operator first starts the drive motor 403 installed on the top of the separation tank 1. The motor drives the stirring shaft 301 to rotate at high speed in the stirring chamber 6 through the belt drive mechanism. When the stirring shaft 301 rotates, the drive unit 801 fixed at its top rotates synchronously. The gravity balls 8016 on both sides of the shaft swing outward under the action of centrifugal force. Through the linkage mechanism composed of the rotating rod 8014 and the connecting rod 8015, the centrifugal force is converted into an upward pulling force, which overcomes the elastic force of the return spring 13 and pulls the longitudinal sleeve 8013 and the lifting rod 8017 fixed thereto to move upward. The lifting rod 8017 then drives the inner tube 8021, which is slidably assembled in the inner hole 9 of the stirring shaft 301, to move upward, so that the inner groove on the wall of the inner tube 8021 is completely misaligned with the outer groove on the wall of the stirring shaft 301 in the axial direction. The smooth wall of the inner tube 8021 blocks the outer groove, thereby reliably closing the drainage channel 8022 at the bottom of the stirring chamber 6, and completely isolating the stirring chamber 6 from the sedimentation chamber 7 below.

[0045] Step Two: After the stirring shaft 301 continues to rotate at high speed and forms a stable and sufficient turbulent field within the stirring chamber 6, the operator simultaneously injects the aquaculture wastewater to be treated and a measured amount of flocculant into the stirring chamber 6 through the wastewater inlet 2 and flocculant dosing port at the top. Upon entering the chamber, the wastewater and flocculant are instantly dispersed and sheared by the high-speed rotating stirring blades 302, and rapidly diffused throughout the entire stirring chamber 6 under turbulent action, achieving rapid and uniform mixing and flocculation reaction from the initial addition.

[0046] Step 3: After the mixing process reaches the predetermined time and the reaction is complete, the operator turns off the drive motor 403. The rotation speed of the stirring shaft 301 and the drive unit 801 gradually decreases until they stop completely. As rotation stops, centrifugal force disappears, and the gravity ball 8016 naturally droops and resets under its own weight. At the same time, the compressed reset spring 13 releases its elasticity, jointly pushing the longitudinal sleeve 8013 downward. The downward movement of the longitudinal sleeve 8013 drives the inner tube 8021 to slide downward along the stirring shaft 301 via the lifting rod 8017 until the insertion shaft 8023 at the top of the inner tube 8021 is limited by the mechanical structure. At this time, the inner through groove on the wall of the inner tube 8021 is completely aligned axially with the outer through groove on the wall of the stirring shaft 301, and the drainage channel 8022 is fully opened.

[0047] Step 4: After the drainage channel 8022 is opened, the mixed wastewater that has completed the flocculation reaction in the mixing chamber 6 will automatically and smoothly flow through the aligned channel group under its own gravity into the sedimentation chamber 7 below, which is completely independent and free from any mixing components.

[0048] Step 5: After the mixed wastewater enters the sedimentation chamber 7, it undergoes a long period of settling in a static environment. The flocs generated by the flocculation reaction slowly sink under gravity, gradually accumulating at the bottom of the sedimentation chamber 7 to form a sludge layer, while the upper liquid gradually turns into clear water, thus efficiently completing solid-liquid separation. The treated supernatant can be drawn out for subsequent reuse or discharge, while the bottom sludge can be periodically discharged, thus completing a full treatment cycle.

[0049] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0050] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A wastewater recycling treatment device for an ecological aquaculture system, comprising a separation tank (1), characterized in that, The separator (1) is provided with a horizontal partition (5) inside, which divides the interior into an upper stirring chamber (6) and a lower sedimentation chamber (7). The stirring chamber (6) is provided with a stirring mechanism (3), which includes a vertically arranged stirring shaft (301) and stirring blades (302) installed thereon. The top end of the stirring shaft (301) passes through the top of the tank and is connected to the driving mechanism (4), and the bottom end passes through the horizontal partition (5) and is rotatably connected thereto. The top of the separation tank (1) is provided with a wastewater inlet (2) and a flocculant dosing port that are connected to the stirring chamber (6); The separation tank (1) also includes a drainage mechanism (8), which is disposed on the stirring shaft (301) and is used to close when the stirring shaft (301) rotates and to automatically open when the stirring shaft (301) stops, so that the stirring chamber (6) is connected to the sedimentation chamber (7).

2. The wastewater recycling treatment device for an ecological aquaculture system according to claim 1, characterized in that, The drive mechanism (4) includes a drive motor (403), which is connected to the top end of the stirring shaft (301) via a belt drive mechanism.

3. The wastewater recycling treatment device for an ecological aquaculture system according to claim 1, characterized in that, The top end of the stirring shaft (301) is connected to the top plate of the tank via a bearing, and the bottom end of the stirring shaft (301) is connected to the horizontal partition (5) via a bearing.

4. The wastewater recycling treatment device for an ecological aquaculture system according to claim 3, characterized in that, The drainage mechanism (8) is applied to the upper and lower chambers of the separation tank (1), which includes a hollow stirring shaft (301), the stirring shaft (301) having an axially penetrating inner hole (9), and its outer wall having at least one set of radially penetrating outer grooves (8221). The drainage mechanism (8) also includes an inner tube (8021) and a drive unit (801). The inner tube (8021) is slidably inserted into the inner hole (9) of the stirring shaft (301), and its outer wall is provided with an inner groove group (8222) corresponding to the outer groove group (8221). The drive unit (801) is located at the top of the stirring shaft (301) and connected to the inner tube (8021). It is used to drive the inner tube (8021) to move axially when the stirring shaft (301) rotates, so that the inner groove group (8222) is misaligned with the outer groove group (8221) to close the drainage channel (8022). When the stirring shaft (301) stops, it drives the inner tube (8021) to reset, so that the inner groove group (8222) is aligned with the outer groove group (8221) to open the drainage channel (8022).

5. The wastewater recycling treatment device for an ecological aquaculture system according to claim 4, characterized in that, The inner tube (8021) has a fixed insert shaft (8023) at the top end. The insert shaft (8023) extends upward from the stirring shaft (301) and is connected to the drive unit (801). The insert shaft (8023) and the top end of the stirring shaft (301) are connected by a spline to achieve circumferential synchronization and axial sliding.

6. The wastewater recycling treatment device for an ecological aquaculture system according to claim 5, characterized in that, The drive unit (801) includes a central shaft (8011), a hinge seat (8012), a rotating rod (8014), a gravity ball (8016), a longitudinal sleeve (8013), a connecting rod (8015), a return spring (13), and an upward lifting rod (8017). The central shaft (8011) is coaxially fixed to the top of the stirring shaft (301), the hinge seat (8012) is fixed to the top of the central shaft (8011), the rotating rod (8014) is symmetrically hinged to both sides of the hinge seat (8012), and the gravity ball (8016) is fixed to the end of the rotating rod (8014). The longitudinal sleeve (8013) is slidably sleeved on the central shaft (8011), and the two ends of the connecting rod (8015) are respectively hinged to the rotating rod (8014) and the longitudinal sleeve (8013). The return spring (13) is sleeved on the central shaft (8011) and acts on the longitudinal sleeve (8013). One end of the lifting rod (8017) is connected to the longitudinal sleeve (8013), and the other end passes through the relief groove (14) on the wall of the stirring shaft (301) and is connected to the inner tube (8021).

7. The wastewater recycling treatment device for an ecological aquaculture system according to claim 6, characterized in that, The portion of the lifting rod (8017) that passes through the relief groove (14) slides in conjunction with the groove wall of the relief groove (14), the length of which is used to limit the axial movement stroke of the inner tube (8021).

8. The wastewater recycling treatment device for an ecological aquaculture system according to claim 4, characterized in that, Both the outer groove group (8221) and the inner groove group (8222) include multiple sets of annular arrays of through grooves arranged at intervals along the axial direction.

9. The wastewater recycling treatment device for an ecological aquaculture system according to claim 4, characterized in that, A dynamic seal (10) is provided between the outer wall of the inner tube (8021) and the inner hole (9) wall of the stirring shaft (301).

10. A treatment method based on the wastewater recycling treatment device for an ecological aquaculture system according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Start the drive mechanism (4) to make the stirring shaft (301) rotate at high speed in the stirring chamber (6). The centrifugal force generated by the rotation of the stirring shaft (301) triggers the drainage mechanism (8) to close, thus isolating the stirring chamber (6) from the sedimentation chamber (7). Step 2: In the turbulent field formed by the continuous rotation of the stirring shaft (301), the wastewater to be treated and the flocculant are simultaneously injected into the stirring chamber (6) to carry out mixing and flocculation reaction; Step 3: After the mixing reaction is completed, stop stirring, the stirring shaft (301) stops rotating, the centrifugal force disappears, and the drainage mechanism (8) automatically opens, so that the stirring chamber (6) and the sedimentation chamber (7) are connected. Step 4: The wastewater that has been mixed in the mixing chamber (6) flows into the sedimentation chamber (7) under the action of gravity through the drainage mechanism (8); Step 5: The wastewater is allowed to settle in the sedimentation chamber (7) to achieve solid-liquid separation.

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