A circulating device based on dialysis-denitrification treatment of ammonia nitrogen wastewater

Abstract

This invention relates to the field of wastewater treatment, specifically to a circulating device for ammonia nitrogen wastewater dialysis-denitrification treatment. The device includes a raw water tank for holding the wastewater, an inlet pipe positioned above the liquid surface when the tank is filled with liquid, and a floating component for floating on the liquid surface. The floating component has an outlet located at the liquid surface, which is connected to the inlet pipe. This invention solves the problem of excessive gas molecules escaping into the air due to the height difference generated when the liquid flows from the top of the raw water tank to the surface, thus ensuring the concentration of ammonium ions in the wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more specifically to a circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment. Background Technology

[0002] With the development of industry and agriculture and the improvement of people's living standards, the discharge of nitrogen-containing wastewater has increased dramatically. Since ammonia nitrogen has important utilization and economic value in agriculture and industry, its recovery from wastewater is crucial.

[0003] Chinese invention patent publication number CN116693106A discloses a wastewater treatment system based on dialysis-denitrification. In this patent, wastewater containing ammonium ions from a raw water tank enters a Daonan dialysis module through a first pipe. Alkali solution from an alkali tank enters the Daonan dialysis module through a second pipe. The Daonan dialysis module is equipped with a cation exchange membrane, with the wastewater and alkali solution located on opposite sides of the membrane. Ammonium ions in the wastewater and driving ions in the alkali solution exchange across the cation exchange membrane under concentration gradient. The ammonium ions react with hydroxide ions in the alkali solution to generate ammonia gas. Then, through a subsequent perdistillation module, the ammonia gas mixes with the acid solution and is converted into ammonium salts for subsequent recycling.

[0004] Combination Figure 1 The diagram shows the existing piping configuration of the raw water tank 1. A water outlet pipe 4 is located at the bottom of the raw water tank 1, and a pump 6 is connected to the water outlet pipe 4. Under the action of the pump 6, waste liquid in the raw water tank 1 can be supplied to the Daonan dialysis unit through the water outlet pipe 4. A first water inlet pipe 2 and a second water inlet pipe 3 are located at the top of the raw water tank 1. Liquid returning from the Daonan dialysis unit 24 flows into the raw water tank 1 through the first water inlet pipe 2. The second water inlet pipe 3 is used for external waste liquid intake. After being filtered for large particulate impurities by the security filter 5, the external waste liquid enters the raw water tank 1 through the second water inlet pipe 3.

[0005] The first inlet pipe 2 is located at the top of the raw water tank 1, which has the following advantages: 1. Liquid enters from the top of the raw water tank 1 without any water pressure resistance, and the liquid easily enters the raw water tank 1 through the first inlet pipe 2. In this way, there is no need to install other pumps on the pipeline along the first inlet pipe 2 to force the liquid into the raw water tank 1. The liquid can flow naturally into the raw water tank 1, saving the installation of pumps and helping to reduce pump costs. 2. The liquid flows from the top of the raw water tank 1 downwards, which prolongs the liquid flow path and is conducive to the mixing of waste liquid. This makes the liquid flowing out of the outlet pipe 4 more uniformly mixed. If the first inlet pipe 2 is located at the bottom of the raw water tank 1, the first inlet pipe 2 is closer to the outlet pipe 4. The liquid flowing out of the first inlet pipe 2 will not be fully mixed before flowing out of the outlet pipe 4, which is not conducive to the full mixing of the liquid in the raw water tank 1.

[0006] However, this also presents the following problems: As the liquid flows downward from the first inlet pipe 2, due to the height difference between the first inlet pipe 2 and the liquid surface, the liquid flows in the air and comes into contact with the air. At the same time, the downward-flowing liquid collides with the liquid surface and splashes into the air. This results in a large area of ​​contact between the liquid and the air, causing aeration. After aeration, the ammonium ions are converted into ammonia molecules. Ammonia molecules are gaseous and can easily escape into the air.

[0007] In addition to gas escape during the downward flow of liquid, ammonia molecules in the wastewater from the raw water tank may also escape. In existing technologies, to ensure a more uniform mixture of the returned liquid and the liquid remaining in the raw water tank, and to achieve a more homogeneous composition of the liquid flowing out of the raw water tank, a stirring device (a stirring motor driving a stirring rod) is usually installed. However, the intense stirring during this process disrupts the calm state of the liquid surface, reducing the resistance to gas exchange in the wastewater. This makes it easier for ammonia molecules generated in the wastewater to escape from the surface into the air. The agitation of the liquid also increases the surface area and frequency of contact between the wastewater and air, accelerating the gas exchange and escape process.

[0008] When ammonia molecules escape into the air, it not only reduces the concentration of ammonium ions in the waste liquid, affecting the recovery efficiency of ammonium, but also has an adverse effect on the surrounding air quality and human health. Summary of the Invention

[0009] The present invention aims to provide a circulating device based on dialysis-denitrification treatment of ammonia nitrogen wastewater, in order to solve the problem of a large number of gas molecules escaping into the air due to the height difference generated when the liquid flows from the top of the raw water tank to the liquid surface.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment, comprising a raw water tank for holding waste liquid, the raw water tank being provided with an inlet pipe, the inlet pipe being located above the liquid surface when the raw water tank is filled with liquid, and also including a floating component for floating on the liquid surface, the floating component being provided with an outlet located at the liquid surface, the outlet being connected to the inlet pipe.

[0011] The principle and advantages of this solution are as follows: The floating component in this application floats on the surface of the raw water tank under the action of buoyancy. Since the outlet and inlet pipe are connected, the liquid flowing into the raw water tank from the inlet pipe flows out from the outlet. Because the outlet is located at the liquid surface, the liquid flows out from the surface, thus eliminating the height difference between the liquid and the liquid surface, reducing liquid flow in the air and reducing aeration. It also avoids liquid splashing caused by the impact between the liquid entering the raw water tank and the liquid surface due to the height difference. The mixing of the liquid entering the raw water tank with the liquid surface is more gradual, reducing the large area of ​​contact between the liquid and air that would cause aeration. This solves the problem of a large amount of gas molecules escaping into the air due to the height difference generated when the liquid flows from the top of the raw water tank to the surface. Through this application, the amount of ammonia molecules escaping into the air is greatly reduced, having a smaller impact on the concentration of ammonium ions in the waste liquid, which is beneficial to ensuring the recovery efficiency of ammonium and has minimal adverse effects on the surrounding air quality and human health.

[0012] In addition, the floating component in this application floats on the liquid surface under the action of buoyancy. No matter how the height of the liquid surface changes, the floating component always floats at the liquid surface, so that the liquid flowing out from the inlet pipe will always flow out from the outlet at the liquid surface. There is never a height difference between the outlet of the floating component and the liquid surface. After the liquid level in the raw water tank changes, the height of the outlet does not need to be manually adjusted. The outlet automatically adjusts its height according to the liquid level, ensuring that the liquid always flows out slowly from the liquid surface.

[0013] In addition, the liquid flowing out from the outlet in this application flows out from the liquid surface, and the liquid pressure it experiences when exiting is small. Therefore, there is no need to install other pumps on the inlet pipe or the pipe connected to the inlet pipe to provide pressure for the liquid to enter the raw water tank. This reduces the use of pumps and lowers equipment costs.

[0014] Preferably, as an improvement, a flexible hose is connected between the floating component and the water inlet pipe, and the water inlet pipe, the flexible hose, and the liquid outlet are connected.

[0015] Thus, a flexible hose connects the floating component and the inlet pipe, allowing liquid from the inlet pipe to enter the floating component through the hose and flow out from the outlet. The hose is flexible enough to automatically bend and adapt to changes in the floating component's height, without restricting these changes.

[0016] Preferably, as an improvement, the water inlet pipe is vertically arranged, and a vertical sliding pipe is connected to the floating component. The sliding pipe and the water inlet pipe are nested together and slide in cooperation. The water inlet pipe, the sliding pipe and the liquid outlet are connected.

[0017] Therefore, by interlocking the sliding tube and the inlet tube, the connection between the inlet tube and the floating component is achieved. Liquid in the inlet tube enters the sliding tube, flows along the sliding tube into the floating component, and then flows out from the outlet. In this application, the sliding tube and the inlet tube slide vertically together. This allows the sliding tube to slide vertically along the inlet tube when the height of the floating component changes, thus adapting to the height changes of the floating component. The connection method between the sliding tube and the inlet tube does not restrict the height changes of the floating component.

[0018] Preferably, as an improvement, the floating component covers the liquid surface.

[0019] Therefore, the floating component covers the liquid surface and hinders the escape of gas in the liquid, reducing the contact between the liquid surface and the air, reducing the volatilization of gas in the liquid, and reducing the upward diffusion and escape of gas molecules in the liquid. This helps to ensure the concentration of ammonium ions in the waste liquid, ensure the recovery efficiency of ammonium, and further reduce the adverse effects on the surrounding air quality and human health.

[0020] Preferably, as an improvement, there are multiple liquid outlets distributed on the floating component, and the floating component is provided with multiple flow channels, which are connected to the liquid outlets and the inlet pipe.

[0021] Therefore, the liquid in the inlet pipe enters multiple flow channels and flows out from multiple outlets. This arrangement, on the one hand, increases the efficiency of liquid flow into the raw water tank compared to using a single outlet; on the other hand, the distributed distribution of multiple outlets disperses the liquid entering the raw water tank, promoting more uniform mixing. Simultaneously, with a fixed total outflow velocity, the increased number of outlets reduces the flow velocity at each individual outlet, thus minimizing the impact on the liquid surface and making the outflow more gentle, which helps reduce gas diffusion and escape.

[0022] Preferably, as an improvement, the floating component has a weight reduction space.

[0023] Therefore, the weight reduction space can reduce the weight of the floating parts, so that the floating parts can float on the liquid surface without much buoyancy, and the floating parts are more likely to float on the liquid surface and will not sink.

[0024] In addition, this application also provides another circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment. This device can automatically stir the liquid according to the change in liquid level, without the need for stirring motor, and at the same time reduce the diffusion and escape of gas molecules in the liquid during the stirring process.

[0025] To achieve the above objectives, the present invention adopts the following technical solution: a circulating device based on dialysis-denitrification treatment of ammonia nitrogen wastewater, comprising a floating component and a raw water tank for holding waste liquid, the inner wall of the raw water tank being circular, the floating component being a floating disk covering the liquid surface; a rotating frame being rotatably connected to the bottom of the raw water tank, and a vertical telescopic stirring rod being connected between the rotating frame and the floating disk; multiple sliders being fixedly connected to the circumferential side of the floating disk, and multiple inclined grooves being provided on the inner side wall of the raw water tank, with the sliders sliding in the grooves.

[0026] The principle and advantages of this solution are as follows: When the liquid surface height changes, the floating disc moves vertically along with the liquid surface. The slider on the floating disc slides in a groove on the inner wall of the raw water tank. Due to the inclined design of the groove, the floating disc rotates as the slider moves within it. This rotation drives the telescopic stirring rod, thus agitating the waste liquid in the raw water tank. This achieves automatic agitation of the waste liquid by the floating disc following the rise and fall of the liquid surface, eliminating the need for a separate stirring motor, reducing energy consumption, and eliminating the need to purchase and install a stirring motor, thereby lowering equipment costs. Simultaneously, the floating disc in this application covers the liquid surface, acting as an isolation barrier between the liquid surface and the air above. During agitation, the floating disc blocks upward-evaporating, diffusing, and escaping gases, preventing gas molecules in the liquid from rising, diffusing, and escaping. This ensures the concentration of ammonium ions in the waste liquid, guarantees ammonium ion recovery efficiency, and reduces the adverse effects of ammonia volatilization and escape on the surrounding environment and human health.

[0027] The telescopic stirring rod in this application can extend and retract vertically, so that when the vertical height of the floating plate changes, the telescopic stirring rod will extend and retract automatically, thereby adapting to the distance between the floating plate and the rotating frame.

[0028] Preferably, as an improvement, the raw water tank is equipped with an inlet pipe. When the raw water tank is filled with liquid, the inlet pipe is located above the liquid surface. The inlet pipe is vertically arranged, and a vertical sliding pipe is connected to the floating component. The sliding pipe and the inlet pipe are nested together and slide in cooperation. The inlet pipe, the sliding pipe and the liquid outlet are connected.

[0029] Therefore, because the sliding tube and the inlet pipe are interlocked, they can rotate relative to each other. When the float rotates, the sliding tube rotates on the inlet pipe, and the inlet pipe does not obstruct the rotation of the float, ensuring that the float can automatically rotate in accordance with changes in the liquid level. Simultaneously, the interlocking of the sliding tube and the inlet pipe allows them to slide vertically relative to each other, and the connection method of the sliding tube and the inlet pipe does not hinder the raising and lowering of the float.

[0030] Preferably, as an improvement, the inner wall of the raw water tank is provided with an annular groove, the rotating frame includes a rotating ring and a supporting ring, a connecting rod is fixedly connected between the rotating ring and the supporting ring, and the bottom of the telescopic stirring rod is fixedly located on the supporting ring.

[0031] Thus, the rotating ring can rotate within the annular groove, and the connecting rod connects the rotating ring and the support ring. The support ring supports and connects the telescopic stirring rod. When the telescopic stirring rod rotates, it drives the support ring to rotate, which in turn drives the rotating ring to rotate within the annular groove via the connecting rod, thereby achieving the rotation of the entire rotating frame.

[0032] Preferably, as an improvement, it also includes a Daonan dialysis unit, a pump, and an intermediate tank. The bottom of the raw water tank is provided with an outlet pipe, which is connected to the intermediate tank. The intermediate tank is connected to the Daonan dialysis unit, and the Daonan dialysis unit is connected to the inlet pipe. The pump is used to pump the liquid in the outlet pipe into the intermediate tank. The pump works intermittently or switches repeatedly between two power levels when it is working.

[0033] In this application, a pump is used to pump liquid out of the raw water tank. The pumped liquid enters an intermediate tank, and then from the intermediate tank into the Daonan dialysis unit. After displacement in the Daonan dialysis unit, the liquid flows back to the raw water tank through the inlet pipe. The intermediate tank in this application serves as a transfer and storage point for the liquid pumped from the raw water tank, allowing it to be temporarily stored until it flows into the Daonan dialysis unit. Because the pump in this application operates intermittently or repeatedly switches between two power levels, the flow rate of the liquid from the raw water tank is not constant, while the inlet speed is constant. This causes the liquid level in the raw water tank to continuously change, thus achieving the change in liquid level in the raw water tank during the Daonan dialysis process and realizing the rise and fall of the floating disc.

[0034] Preferably, as an improvement, the liquid outlet is located at the bottom or side of the floating component. Thus, the liquid outlet can be located at different parts of the floating component. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the original water tank in the existing technology.

[0036] Figure 2 This is a schematic diagram of the improved raw water tank.

[0037] Figure 3 for Figure 2 Bottom sectional view of the floating component.

[0038] Figure 4 for Figure 2 A bottom view of the floating component.

[0039] Figure 5 for Figure 2 Top view of the rotating frame.

[0040] Figure 6 This is a front sectional view of the floating component.

[0041] Figure 7 This is a schematic diagram showing the connection between the intermediate tank and the Daonan dialysis assembly. Detailed Implementation

[0042] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: raw water tank 1, first inlet pipe 2, second inlet pipe 3, outlet pipe 4, security filter 5, pump 6, telescopic stirring rod 7, chute 8, slider 9, outlet 10, flow channel 11, sliding tube 12, inlet chamber 13, inlet pipe 14, floating plate 15, rotating ring 16, support ring 17, connecting rod 18, weight reduction space 19, inlet pipe 21, intermediate tank 22, outlet pipe 23, Daonan dialysis assembly 24, left chamber 25, right chamber 26. Example 1

[0043] The basics are as follows: Figures 2-5 The diagram illustrates a circulating device for ammonia nitrogen wastewater dialysis-denitrification treatment, comprising a raw water tank 1 for holding waste liquid. The raw water tank 1 is equipped with an inlet pipe 14 (in this embodiment, the inlet pipe 14 is connected to two inlet branch pipes (not shown in the diagram). One inlet branch pipe connects to the Daonan dialysis assembly 24, and the other inlet branch pipe connects to a security filter 5. Thus, liquid flowing back from the Daonan dialysis assembly 24 can enter the inlet pipe 14 through one inlet branch pipe, and then into the raw water tank 1. Liquid flowing out of the security filter 5 can enter the inlet pipe 14 through the other inlet branch pipe, and then into the raw water tank 1, replenishing the raw water tank 1). In this embodiment, the outlet end of the inlet pipe 14 is located above the liquid surface. The inner wall of the raw water tank 1 in this embodiment is circular.

[0044] The circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment in this embodiment also includes a floating component for floating on the liquid surface of the raw water tank 1. Specifically, the floating component is disc-shaped, hence it is a floating disc 15. The shape of the floating disc 15 is adapted to the inner wall shape of the raw water tank 1, thus enabling it to cover the liquid surface. In this embodiment, the floating disc 15 floats on the liquid surface under the action of buoyancy. The floating disc 15 is provided with an outlet 10 located at the liquid surface; that is, when the floating disc 15 floats at the liquid surface, the outlet 10 on the floating disc 15 is located at the liquid surface. In this embodiment, it is easy to achieve the outlet 10 being located at the liquid surface: according to Archimedes' principle - buoyancy calculation formula F... 浮 =ρ 液 gv 排 (where ρ液 It is the density of the liquid; V 排 v is the volume of the floating disk 15 submerged in the liquid, and also the volume of liquid displaced by the floating disk 15; g is the acceleration due to gravity. It can be seen that the magnitude of the buoyant force on the floating disk 15 is related to the volume of its submerged portion in the liquid. Since the floating disk 15 is cylindrical, v 排 =S 底 h(where S) 底 (where h is the bottom area of ​​the floating plate 15 and h is the depth at which the floating plate 15 is submerged in the liquid, which is also the position of the liquid surface) It can be seen that the liquid outlet 10 can be set at the corresponding submersion depth of the floating plate 15.

[0045] Combination Figure 2 and Figure 3 As shown, in this embodiment, there are multiple liquid outlets 10, located at the bottom of the floating plate 15. The depth of the multiple liquid outlets 10 in the floating plate 15 is not less than the depth to which the floating plate 15 is submerged in the liquid, thus ensuring that the liquid outlets 10 are located at the liquid surface. The floating plate 15 has multiple transverse flow channels 11 inside, one end of which communicates with the liquid outlet 10. A liquid inlet chamber 13 is located in the middle of the floating plate 15, and the other end of the flow channels 11 communicates with the liquid inlet chamber 13. In this embodiment, the vertical position of the flow channels 11 corresponds to the position where the floating plate 15 is submerged in the liquid.

[0046] In this embodiment, a sliding tube 12 is welded and fixed to the top of the middle part of the floating plate 15. The sliding tube 12 is sleeved on the outside of the water inlet pipe 14, and the sliding tube 12 can slide vertically on the water inlet pipe 14. The bottom of the sliding tube 12 is connected to the liquid inlet chamber 13, thereby connecting the water inlet pipe 14, the sliding tube 12, the flow channel 11, and the liquid outlet 10 in this embodiment. To prevent the sliding tube 12 from sliding downward and detaching from the water inlet pipe 14, a pull rope (not shown in the figure) can be connected to the top of the floating plate 15. The top of the pull rope is tied to the top of the raw water tank 1 or other objects outside the raw water tank 1. In this way, the pulling of the pull rope limits the movement, thereby preventing the top of the sliding tube 12 from sliding down and detaching from the water inlet pipe 14 when it reaches the bottom of the water inlet pipe 14.

[0047] In this way, when the raw water tank 1 is filled with liquid, the floating plate 15 in this embodiment floats on the surface of the liquid in the raw water tank 1 under the action of buoyancy. The liquid in the raw water tank 1 is discharged through the outlet pipe 4. The discharged liquid enters the Daonan dialysis component under the action of the pump. Then the liquid flows out of the Daonan dialysis component and flows back to the raw water tank 1. This process is the prior art and will not be described in detail here. For example, see the Chinese invention patent publication number CN116693106A, which discloses a wastewater treatment system based on dialysis-denitrification.

[0048] Liquid returning from the Daonan dialysis unit flows into the inlet pipe 14 through the inlet branch pipe, then into the sliding pipe 12, and finally into the inlet chamber 13. The liquid flows into different flow channels 11 and slowly flows out from different outlets 10. Since the outlets 10 are located at the liquid surface, the liquid flows out from the liquid surface, so there is no height difference between the liquid and the liquid surface when it flows out, thereby reducing the liquid flow in the air and reducing aeration. It also avoids the liquid entering the raw water tank 1 from colliding with the liquid surface and splashing due to the height difference. The liquid entering the raw water tank 1 mixes more gently with the liquid surface, reducing the large area of ​​contact between the liquid and the air and the aeration. This solves the problem of a large number of gas molecules escaping into the air due to the height difference when the liquid flows from the top of the raw water tank 1 to the liquid surface.

[0049] Furthermore, during the operation of this device, even if the liquid level in the raw water tank 1 changes within the range of the floating plate 15, and the liquid level in the raw water tank 1 is not constant, the floating plate 15 always floats on the liquid surface. If the liquid level rises, the floating plate 15 rises with the liquid level, and the sliding tube 12 slides upward along the inlet pipe 14. If the liquid level falls, the floating plate 15 falls with the liquid level, and the sliding tube 12 slides downward along the inlet pipe 14. This ensures that the liquid flowing out of the inlet pipe 14 always flows out from the outlet 10 at the liquid surface. There is never a height difference between the outlet 10 of the floating plate 15 and the liquid surface. After the liquid level in the raw water tank 1 changes, the position of the outlet 10 does not need to be manually adjusted. This achieves automatic adjustment of the outlet 10 according to the liquid level, ensuring that the liquid always flows out slowly from the liquid surface.

[0050] Furthermore, in this embodiment, the floating disk 15 covers the liquid surface, and the floating disk 15 plays a certain role in blocking the liquid surface and the air above it, which can reduce and hinder the upward volatilization, diffusion and escape of ammonia molecules in the liquid below the floating disk 15 to a certain extent.

[0051] Of course, in other embodiments, the connection between the water inlet pipe 14 and the floating plate 15 can also be made using a flexible hose. That is, the top of the floating plate 15 and the bottom of the water inlet pipe 14 are connected by a flexible hose, so that the water inlet pipe 14, the flexible hose, the flow channel 11, and the liquid outlet 10 are connected. When the height of the floating plate 15 changes, the flexible hose can bend accordingly.

[0052] In addition, combined Figure 6 As shown, in other embodiments, the liquid outlet 10 can also be located on the circumferential side of the floating plate 15, and the distance between the liquid outlet 10 and the bottom surface of the floating plate 15 is the depth to which the floating plate 15 is immersed in the liquid. In this way, the liquid can also flow out horizontally and gently from the liquid outlet 10 on the side of the floating plate 15.

[0053] In addition, in other embodiments, combined with Figure 6 As shown, the floating disk 15 may also be provided with multiple weight-reducing spaces 19. The weight-reducing spaces 19 can be located inside or on the outer side of the floating disk 15. The weight-reducing spaces 19 are, for example, weight-reducing grooves or weight-reducing holes. This can reduce the weight of the floating disk 15, making it easier for the floating disk 15 to float on the liquid surface. In this embodiment, the floating disk 15 can be assembled from multiple components (e.g., connected by bolts), which facilitates manufacturing and reduces the manufacturing difficulty of the floating disk 15. Example 2

[0054] This embodiment, based on Embodiment 1, provides another circulating device for ammonia nitrogen wastewater dialysis-denitrification treatment, including a floating component and a raw water tank 1 for holding the waste liquid. The inner wall of the raw water tank 1 is circular, and the floating component is a floating disk 15 that covers the liquid surface. Multiple inclined grooves 8 are provided on the inner wall of the raw water tank 1. In this embodiment, there are two inclined grooves 8, located on the left and right sides of the inner wall of the raw water tank 1, respectively. The two grooves 8 have the same inclination direction. Figure 2 This is a frontal sectional view of the raw water tank 1, so only a portion of each of the two chutes 8 is visible. Slider 9s are welded to the left and right sides of the floating plate 15, and the slider 9s slide within the chutes 8. In this embodiment, the top of the chutes 8 extends upward to the top of the raw water tank 1, which facilitates the insertion of the slider 9 from the top of the chutes 8 into the chutes 8 when the floating plate 15 is placed into the raw water tank 1.

[0055] The bottom of the raw water tank 1 is rotatably connected to a rotating frame, combined with... Figure 5 As shown, the rotating frame in this embodiment includes a rotating ring 16 and a support ring 17. The support ring 17 is located inside the rotating ring 16, and multiple connecting rods 18 connect the support ring 17 and the rotating ring 16. The inner wall of the raw water tank 1 is provided with an annular groove, and the rotating ring 16 is located in the annular groove and can rotate in the annular groove.

[0056] Combination Figure 2 , Figure 4 and Figure 5 As shown, multiple telescopic stirring rods 7 are connected between the bottom of the floating disc 15 and the support ring 17. Specifically, the telescopic stirring rod 7 is formed by two sleeves nested together. The connection between the telescopic stirring rod 7 and the floating disc 15 can be fixed by snap-fit ​​or screws. The connection between the bottom end of the telescopic stirring rod 7 and the support ring 17 can also be fixed by snap-fit ​​or screws.

[0057] Combination Figure 7As shown, this device also includes a Daonan dialysis module 24, a pump 6, and an intermediate tank 22. An inlet pipe 21 is connected to the left side of the intermediate tank 22, and the inlet pipe 21 is connected to an outlet pipe 4. The pump 6 is located on the inlet pipe 21. The Daonan dialysis module 24 includes a shell and a cation exchange membrane. The cation exchange membrane is fixed inside the shell, connecting the Daonan dialysis module 24 to a left chamber 25 and a right chamber 26. The intermediate tank 22 and the top of the left chamber 25 of the Daonan dialysis module 24 are connected by a pipe. An outlet pipe 23 is located at the bottom of the left chamber 25 of the Daonan dialysis module 24, and the outlet pipe 23 is connected to the inlet pipe 14 (specifically, connected to an inlet branch pipe on the inlet pipe 14). The pump 6 is used to pump the liquid in the raw water tank 1 into the intermediate tank 22 through the outlet pipe 4 and the inlet pipe 21. In this embodiment, pump 6 operates intermittently or repeatedly switches between two power levels. Specifically, when pump 6 operates intermittently, the PLC automatically controls its operation; for example, pump 6 runs for 10 minutes, then stops for 10 minutes, then runs for another 10 minutes, and so on. When pump 6 repeatedly switches between two power levels, the PLC automatically controls the switching between these levels; for example, pump 6 runs at high power for 10 minutes, then switches to low power, then runs at low power for 10 minutes, then switches back to high power for 10 minutes, and so on.

[0058] The effect achieved by switching between two different power levels and by intermittent operation of pump 6 is the same. Therefore, this embodiment uses intermittent operation of pump 6 as an example for explanation: Assuming that the raw water tank 1 contains a certain height of waste liquid, pump 6 is started. Pump 6 pumps the liquid into intermediate tank 22 through outlet pipe 4 and inlet pipe 21. The liquid in intermediate tank 22 enters the left chamber 25 of Daonan dialysis component 24 for displacement reaction. The reacted liquid flows out naturally from outlet pipe 23 of Daonan dialysis component 24 and flows naturally into inlet pipe 14. The liquid flows from inlet pipe 14 into floating plate 15 and flows out from outlet 10 of floating plate 15.

[0059] During this process, the outflow velocity of the liquid from the outlet pipe 4 of the raw water tank 1 is greater than the return velocity of the liquid from the inlet pipe 14. Therefore, the liquid surface height in the raw water tank 1 continuously decreases, and the floating plate 15 moves vertically downwards following the liquid surface. After 10 minutes of operation, the pump 6 stops working, and at this time, no more liquid flows out of the outlet pipe 4. However, a certain amount of liquid remains in the intermediate tank 22 (this portion of liquid can still flow into the Daonan dialysis module 24). The liquid in the intermediate tank 22 continues to flow into the left chamber 25 of the Daonan dialysis module 24 for liquid supply, thus ensuring that the displacement reaction in the Daonan dialysis module 24 does not stop. After the liquid reaction in the Daonan dialysis module 24, it flows out from the outlet pipe 23 of the Daonan dialysis module 24 and returns to the floating plate 15 through the inlet pipe 14. The liquid continues to flow out from the outlet 10. Since the raw water tank 1 only receives liquid and does not receive liquid at this time, the liquid in the raw water tank 1 gradually increases again, and the liquid surface begins to rise, causing the floating plate 15 to move upwards. Ten minutes later, pump 6 restarted. The outflow rate of liquid in raw water tank 1 was greater than the inflow rate of liquid in inlet pipe 14, and the liquid level in raw water tank 1 dropped again. The floating plate 15 followed the drop in liquid level. Thus, this process was repeated continuously.

[0060] In this way, the floating disk 15 moves vertically continuously, and the slider 9 on the floating disk 15 slides repeatedly in the groove 8 on the inner wall of the raw water tank 1. Because the groove 8 is inclined, it guides the slider 9 as it moves, causing the floating disk 15 to rotate. The floating disk 15 drives the telescopic stirring rod 7 to rotate, which in turn drives the rotating frame. The telescopic stirring rod 7 automatically adjusts its length as the floating disk 15 rises and falls. During this rotation, the telescopic stirring rod 7 stirs the waste liquid in the raw water tank 1, achieving automatic stirring and ensuring uniform mixing. This helps to ensure better reaction results in the Daonan dialysis unit 24. Furthermore, this stirring method is gentle and gradual, reducing the evaporation of gases from the liquid.

[0061] Pump 6 uses a method of continuously switching between high and low power to raise and lower the liquid level, similar to the intermittent operation of pump 6, which will not be described in detail here.

[0062] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment, comprising a raw water tank for holding waste liquid, wherein the raw water tank is provided with an inlet pipe, and the inlet pipe is located above the liquid surface when the raw water tank is filled with liquid, characterized in that: It also includes a floating component for floating on the liquid surface, the floating component having a liquid outlet located at the liquid surface, the liquid outlet being connected to a water inlet pipe, and the liquid flowing into the raw water tank from the water inlet pipe flowing out from the liquid outlet; the floating component completely covers the liquid surface; The outlet is located at the bottom of the floating plate, and the depth of the outlet in the floating plate is not less than the depth to which the floating plate is submerged in the liquid; or, the outlet is located on the circumferential side of the floating plate, and the distance between the outlet and the bottom surface of the floating plate is the depth to which the floating plate is submerged in the liquid. It also includes the Daonan dialysis unit, pump and intermediate tank. The bottom of the raw water tank is equipped with an outlet pipe, which is connected to the intermediate tank. The intermediate tank is connected to the Daonan dialysis unit, and the Daonan dialysis unit is connected to the inlet pipe. The pump is used to pump the liquid in the outlet pipe into the intermediate tank. The water inlet pipe is vertically arranged, and a vertical sliding pipe is connected to the floating component. The sliding pipe and the water inlet pipe are nested together and slide in cooperation. The water inlet pipe, the sliding pipe and the liquid outlet are connected. The liquid outlet has multiple outlets distributed on the floating component. The floating component is provided with multiple flow channels, which are connected to the liquid outlets and the water inlet pipe. The shape of the floating plate is adapted to the shape of the inner wall of the original water tank.

2. The circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment according to claim 1, characterized in that: The floating component has a weight reduction space.

3. The circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment according to claim 1, characterized in that: The inner wall of the raw water tank is circular, and the floating component is a floating disc; a rotating frame is rotatably connected to the bottom of the raw water tank, and a vertical telescopic stirring rod is connected between the rotating frame and the floating disc; multiple sliders are fixedly connected to the circumferential side of the floating disc, and multiple inclined grooves are provided on the inner side wall of the raw water tank, with the sliders sliding in the grooves.

4. A circulating device based on ammonia nitrogen wastewater dialysis-denitrification treatment according to claim 3, characterized in that: The inner wall of the raw water tank is provided with an annular groove. The rotating frame includes a rotating ring and a supporting ring. A connecting rod is fixedly connected between the rotating ring and the supporting ring. The bottom of the telescopic stirring rod is fixedly located on the supporting ring.

Images