A treatment device for refractory and high-total-nitrogen wastewater

Abstract

The present application discloses a treatment device for refractory and high-total-nitrogen wastewater, which relates to the technical field of wastewater treatment devices. The device includes a mixing cylinder in which a mixing chamber is formed. A water inlet pipe and a feed pipe are provided at the top of the mixing cylinder, and a discharge pipe is provided at the bottom of the mixing chamber; a push plate is connected to slide up and down in the mixing chamber; a driving member drives the push plate to move up and down; a discharge hole is formed on the bottom chamber wall of the mixing chamber; a water outlet is formed on the circumferential side chamber wall at the top of the mixing chamber, and a filter screen is formed on the mixing cylinder; a water inlet is formed on the circumferential side chamber wall at the top of the mixing chamber, a drain outlet is formed on the circumferential side chamber wall at the bottom of the mixing chamber, and a communication hole is formed on the mixing cylinder; an annular partition; when the annular partition abuts against the top chamber wall of the mixing chamber, the upper through hole is communicated with the water inlet; a connecting component connects the push plate and the annular partition; a water isolation plate for plugging the discharge hole is slidably connected to the mixing cylinder, and a power component is provided on the mixing cylinder. The present application can improve the mixing effect while maintaining the crystallization effect.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment equipment, and in particular to a treatment equipment for difficult-to-degrade, high-total nitrogen wastewater. Background Art

[0002] High total nitrogen wastewater refers to wastewater with a total nitrogen content exceeding a certain standard. It usually comes from the production processes of the chemical, pharmaceutical, food and other industries, and contains a large amount of nitrogen compounds such as ammonia nitrogen and nitrate nitrogen. This kind of wastewater has serious pollution and harm to the ecological environment of the water body, so effective treatment methods must be adopted to reduce its total nitrogen content. In recent years, with the improvement of environmental awareness and technological progress, the treatment technology for high total nitrogen wastewater has received widespread attention and development, and a variety of treatment processes have been applied in actual projects, significantly improving the quality of the water environment.

[0003] At present, chemical precipitation is often used to treat high total nitrogen wastewater, that is, adding magnesium salts and phosphates to the wastewater to form magnesium ammonium phosphate crystals with ammonia nitrogen, thereby achieving the purpose of removing ammonia nitrogen. In addition, in order to reduce costs, there is another method that utilizes the pyrolysis properties of magnesium ammonium phosphate and mixes the pyrolysis products with wastewater to achieve the effect of removing ammonia nitrogen. These two methods are more common in industrial applications, can effectively remove ammonia nitrogen in wastewater, and the generated magnesium ammonium phosphate can also be reused as fertilizer.

[0004] However, the existing chemical precipitation method and thermal decomposition method face a common problem when treating high-total nitrogen wastewater: when magnesium ammonium phosphate is mixed with wastewater, stirring too gently will lead to insufficient mixing of magnesium salt, phosphate and wastewater, affecting the mixing effect; while stirring too vigorously will reduce the crystallization effect of the precipitation zone, thereby affecting the removal effect of ammonia nitrogen. This not only reduces the treatment efficiency, but also increases energy consumption and cost, limiting the promotion and use of these methods in practical applications. Summary of the invention

[0005] In order to improve the mixing effect while maintaining the crystallization effect, the present application provides a treatment device for difficult-to-degrade, high-total nitrogen wastewater.

[0006] The present application provides a treatment device for difficult-to-degrade, high-total nitrogen wastewater, which adopts the following technical solution:

[0007] A treatment device for difficult-to-degrade, high-total nitrogen wastewater, comprising

[0008] A mixing cylinder, wherein a mixing chamber is formed in the mixing cylinder, a water inlet pipe and a feed pipe are arranged at the top of the mixing cylinder, and a discharge pipe is arranged at the bottom of the mixing chamber, wherein the water inlet pipe, the feed pipe and the discharge pipe are respectively connected to the mixing chamber;

[0009] A push plate, which is connected to slide up and down in the mixing chamber;

[0010] A driving member, which is arranged in the mixing cylinder, and the driving member drives the push plate to move up and down;

[0011] An excretion hole communicating with the excretion pipe is formed on the bottom chamber wall of the mixing chamber, and a receiving groove is formed by communicating the peripheral hole walls around the excretion hole;

[0012] A plurality of water outlet holes are formed at intervals along the circumferential direction on the peripheral chamber wall at the top of the mixing chamber. A water delivery hole corresponding to and communicating with each water outlet hole is formed on the peripheral groove wall of the receiving groove far from the excretion hole. A filter net located in the receiving groove and surrounding the excretion hole is formed on the mixing cylinder;

[0013] An inlet hole staggered with the water outlet holes is formed on the peripheral chamber wall at the top of the mixing chamber. A drain hole corresponding to each inlet hole is formed on the peripheral chamber wall at the bottom of the mixing chamber. A communication hole communicating the inlet hole and the drain hole is formed on the mixing cylinder;

[0014] An annular partition plate is arranged to slide up and down in the mixing chamber. The outer peripheral side wall of the annular partition plate is in sliding contact with the peripheral chamber wall of the mixing chamber up and down. The outer peripheral side of the push plate is slidably connected to the inner peripheral side wall of the annular partition plate;

[0015] The annular partition plate is formed with upper through holes corresponding to each inlet hole one by one. When the annular partition plate abuts against the top chamber wall of the mixing chamber, the upper through holes are communicated with the inlet holes;

[0016] A connecting component connects the push plate and the annular partition plate. When the push plate moves downward, the connecting component drives the annular partition plate to move downward until it abuts against the bottom chamber wall of the mixing chamber. Then the connecting component controls the relative sliding of the push plate and the annular partition plate;

[0017] When the push plate moves upward, the connecting component drives the annular partition plate to move upward until it abuts against the top chamber wall of the mixing chamber. Then the connecting component controls the relative sliding of the push plate and the annular partition plate;

[0018] A water blocking plate for blocking the excretion hole is slidably connected to the mixing cylinder, and a power component is arranged on the mixing cylinder;

[0019] When the annular partition plate abuts against the bottom chamber wall of the mixing chamber, the power component controls the water blocking plate to open the excretion hole;

[0020] When the annular partition plate abuts against the top chamber wall of the mixing chamber, the power component controls the water blocking plate to block the excretion hole.

[0021] By adopting the above technical solution, during mixing, the driving member drives the push plate to move downward. At this time, the wastewater below the push plate is squeezed through the overflow holes into the area formed above the push plate and the cavity wall of the mixing chamber, and the squeezed wastewater forms a circulating flow. At the same time, the wastewater below the push plate is discharged through the water outlet, and is relatively evenly mixed with the wastewater forming a circulating flow above the push plate; while the wastewater below the push plate is in a relatively gentle state, which is conducive to the reaction crystallization of the wastewater with the pyrolysis products of magnesium ammonium phosphate, improving the precipitation crystallization speed. And so on, when the driving member drives the push plate to move upward, the wastewater above the push plate flows downward through the overflow holes and is squeezed into the area between the bottom of the push plate and the bottom cavity wall of the mixing chamber, and forms a circulating flow, and the wastewater above the push plate can enter the water inlet, and then be discharged from the water outlet and be relatively evenly mixed with the wastewater forming below the push plate; while the area above the push plate is in a relatively gentle state, which is convenient for the reaction crystallization of the wastewater with the pyrolysis products of magnesium ammonium phosphate, improving the precipitation crystallization speed.

[0022] Optionally, the connection assembly includes a connection bar, a connection spring, connection teeth and sliding teeth;

[0023] A connection groove extending in the vertical direction is formed on the inner peripheral side wall of the annular partition plate. The connection bar is slidably connected to the connection groove. The connection spring is arranged in the connection groove, and the connection spring pushes the connection bar to slide in the direction close to the push plate;

[0024] The connection teeth are arranged on the side of the connection bar facing the push plate. There are multiple connection teeth and they are evenly spaced up and down;

[0025] The sliding teeth are arranged on the outer wall of the push plate and are slidably connected up and down in the connection groove. The sliding teeth are meshed with the connection teeth;

[0026] The end of the annular partition plate abuts against the cavity wall of the mixing chamber, and when the push plate slides up and down, the sliding teeth are slidably connected to the connection teeth.

[0027] By adopting the above technical solution, the connection assembly can effectively control the relative movement between the push plate and the annular partition plate, ensuring that during the up and down sliding process of the push plate, the annular partition plate can follow or slide relatively synchronously. Specifically, the design of the connection bar and the connection spring enables the connection bar to freely slide in the connection groove and always maintain close contact with the push plate, thus ensuring the stable meshing of the connection teeth and the sliding teeth. When the end of the annular partition plate abuts against the cavity wall of the mixing chamber and the push plate moves up and down, the sliding teeth will slide along the connection teeth, thereby realizing the coordinated action of the annular partition plate and the push plate, ensuring that during the operation of the entire device, the actions of each component are coordinated, improving the reliability and stability of the device.

[0028] Optionally, the driving member is a hydraulic cylinder, which is arranged on the outer wall of the top of the mixing cylinder. The piston rod of the hydraulic cylinder is connected to the top of the push plate, and the piston rod of the hydraulic cylinder is slidably connected to the mixing cylinder up and down.

[0029] By adopting the above technical solution, using the hydraulic cylinder as the driving member can achieve precise control of the up and down movement of the push plate, ensuring that the push plate can move up and down smoothly during the mixing process, thereby improving the mixing effect.

[0030] Optionally, water overflow holes extending in the vertical direction are formed on the outer peripheral side wall of the push plate. There are multiple water overflow holes, which are evenly spaced along the circumferential direction.

[0031] By adopting the above technical solution, when the push plate squeezes the wastewater, the wastewater can pass through the water overflow holes, making the wastewater form a circulating flow and improving the mixing effect of the wastewater.

[0032] Optionally, a sliding groove communicating with the receiving groove is formed on the side wall of the mixing cylinder. The mixing cylinder is provided with a water filtering plate, and a plurality of water filtering holes are evenly spaced on the water filtering plate;

[0033] The water filtering plate is slidably connected to the sliding groove. The filter screen is arranged on the top of the water filtering plate. A sealing plate is arranged on the side wall of the water filtering plate. A clamping groove communicating with the sliding groove and adapted to the sealing plate is formed on the side wall of the mixing cylinder;

[0034] When the sealing plate is snapped into the clamping groove, the sealing plate blocks the notch of the sliding groove.

[0035] By adopting the above technical solution, the crystals in the wastewater are collected through the cooperation of the water filtering plate and the filter screen, which is convenient for recycling the crystals in the wastewater.

[0036] Optionally, a locking bar is slidably connected to the outer wall of the mixing cylinder. A locking block is arranged on the side of the sealing plate facing away from the water filtering plate. The locking block is formed with a locking hole for the locking bar to slide through.

[0037] By adopting the above technical solution, the position of the sealing plate can be effectively fixed, reducing the possibility of the sealing plate loosening or falling off due to vibration or other factors during the treatment process, thereby ensuring the stability and reliability of the water filtering plate and improving the operation stability of the entire equipment.

[0038] Optionally, a sealing ring surrounding the notch of the sliding groove is arranged on the wall of the clamping groove. When the sealing plate is snapped into the clamping groove, the sealing ring abuts against the side wall of the sealing plate.

[0039] By adopting the above technical solution, when the sealing plate is snapped into the clamping groove, the sealing ring abuts against the side wall of the sealing plate, effectively reducing the possibility of wastewater leakage.

[0040] Optionally, the power assembly includes a power rope, a power column, and a power spring;

[0041] The power spring is disposed inside the mixing cylinder, and the mixing cylinder pushes the water-blocking plate to block the discharge hole;

[0042] The power column is disposed at the bottom of the annular partition plate. The power column slides up and down inside the mixing cylinder. The power rope slidably penetrates through the mixing cylinder, and two ends of the power rope are respectively connected to the water-blocking plate and the power column;

[0043] When the annular partition plate abuts against the bottom wall of the mixing chamber, the power rope pulls the water-blocking plate to open the discharge hole;

[0044] When the annular partition plate abuts against the top wall of the mixing chamber, the power spring pushes the water-blocking plate to block the discharge hole.

[0045] By adopting the above technical solution, when the annular partition plate abuts against the bottom wall of the mixing chamber, the power rope pulls the water-blocking plate to open the discharge hole, enabling the mixed wastewater to be smoothly discharged; when the annular partition plate abuts against the top wall of the mixing chamber, the power spring pushes the water-blocking plate to block the discharge hole, restricting the wastewater from entering through the water outlet and then discharging into the mixing chamber through the discharge hole.

[0046] In summary, the present application includes at least one of the following beneficial effects:

[0047] 1. During mixing, the mixing chamber is divided into a mixing area and a crystallization area, which can improve the mixing effect while maintaining the crystallization effect;

[0048] 2. When the push plate squeezes the wastewater, the wastewater can pass through the overflow holes, causing the wastewater to form a circulating flow and improving the mixing effect of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a schematic external structure diagram of an embodiment of the present application;

[0050] Figure 2 is a schematic internal cross-sectional diagram of an embodiment of the present application;

[0051] Figure 3 is a schematic internal cross-sectional diagram of the mixing cylinder in an embodiment of the present application;

[0052] Figure 4 is Figure 1 an enlarged schematic view of part A of

[0053] Figure 5 is a schematic diagram of the state when the annular partition plate blocks the drain opening in an embodiment of the present application;

[0054] Figure 6 isFigure 2 Schematic enlarged view of part B

[0055] Reference numerals: 1, mixing cylinder; 11, mixing chamber; 12, water inlet pipe; 13, feed pipe; 14, discharge pipe; 15, discharge hole; 151, receiving groove; 16, water outlet; 161, water delivery hole; 17, water inlet; 18, drain outlet; 181, communication hole; 19, sliding groove; 191, clamping groove; 2, push plate; 21, overflow hole; 3, filter screen; 31, water filtering plate; 311, water filtering hole; 32, sealing plate; 33, locking bar; 34, locking block; 341, locking hole; 35, sealing ring; 4, annular partition; 41, upper through hole; 42, connecting groove; 5, connecting component; 51, connecting bar; 52, connecting spring; 53, connecting tooth; 54, sliding tooth; 6, water separating plate; 7, power component; 71, power rope; 72, power column; 73, power spring; 8, hydraulic cylinder. Detailed implementation manners

[0056] The following further elaborates on this application Figures 1-6 in conjunction with the appended drawings.

[0057] An embodiment of this application discloses a treatment device for refractory and high-total-nitrogen wastewater.

[0058] Refer to Figure 1 and Figure 2 , a treatment device for refractory and high-total-nitrogen wastewater provided by an embodiment of this application includes a mixing cylinder 1, a push plate 2, and a driving member. The mixing cylinder 1 has a cylindrical structure, and a mixing chamber 11 is formed inside the mixing cylinder 1. A water inlet pipe 12 and a feed pipe 13 are fixedly connected to the top of the mixing cylinder 1, and a discharge pipe 14 is fixedly connected to the bottom of the mixing chamber 11. The water inlet pipe 12, the feed pipe 13, and the discharge pipe 14 are respectively communicated with the mixing chamber 11.

[0059] During use, wastewater is introduced into the mixing chamber 11 through the water inlet pipe 12, and then the pyrolysis product of magnesium ammonium phosphate is input into the mixing chamber 11 through the feed pipe 13, so that the pyrolysis product of magnesium ammonium phosphate can be mixed with the wastewater. The material of the mixing cylinder 1 can be selected as stainless steel or carbon steel, which has high corrosion resistance and strength and is suitable for various industrial environments.

[0060] The push plate 2 is slidably connected up and down inside the mixing chamber 11. The push plate 2 is made of aluminum alloy, has a low density and high corrosion resistance, and can be used for a long time in a harsh working environment. The push plate 2 has a circular plate structure, and the outer diameter of the push plate 2 is slightly smaller than the inner diameter of the mixing chamber 11. The surface of the push plate 2 is treated by anodic oxidation, further enhancing its corrosion resistance and wear resistance.

[0061] The driving member is arranged on the mixing cylinder 1, and the driving member drives the push plate 2 to move up and down. The driving member is a hydraulic cylinder 8. In other embodiments, the driving member can also be a cylinder or other forms of power sources. The hydraulic cylinder 8 is fixedly installed on the outer wall of the top of the mixing cylinder 1. The piston rod of the hydraulic cylinder 8 is fixedly connected to the middle position of the top of the push plate 2, and the piston rod of the hydraulic cylinder 8 is slidably connected to the mixing cylinder 1 up and down.

[0062] See Figure 2 With Figure 3 , overflow holes 21 are formed on the outer peripheral side wall of the push plate 2. The overflow holes 21 extend in the vertical direction. There are multiple overflow holes 21 and they are evenly spaced in the circumferential direction. During mixing, the hydraulic cylinder 8 is started to drive the push plate 2 to move downward. At this time, the wastewater below the push plate 2 is squeezed into the area formed above the push plate 2 and the wall of the mixing chamber 11 through the overflow holes 21. When the wastewater passes through the overflow holes 21, the pressure is relatively high, which can accelerate the flow of the wastewater into the area above the push plate 2 and the wall of the mixing chamber 11, improving the mixing degree of the wastewater; and when the wastewater flows upward through the overflow holes 21, the wastewater flows along the circumferential side wall of the mixing chamber 11 until it impacts on the top wall of the mixing chamber 11, and then the water flow flows along the top wall of the mixing chamber 11 towards the middle position; then the water flows that converge and collide at the middle position of the top wall of the mixing chamber 11 flow downward, and when they impact and push the top downward, the water flow impacts on the circumferential side wall of the mixing chamber 11, causing the water flow to form a circulating flow and improving the mixing degree of the water flow. And the wastewater below the push plate 2 is in a relatively gentle state, which is conducive to the reaction crystallization of the wastewater and the pyrolysis products of magnesium ammonium phosphate, improving the precipitation crystallization speed. And so on, when the hydraulic cylinder 8 drives the push plate 2 to move upward, the wastewater above the push plate 2 flows downward through the overflow holes 21 and is squeezed into the area between the bottom of the push plate 2 and the bottom wall of the mixing chamber 11, stirring and mixing the wastewater below the push plate 2 and the pyrolysis products of magnesium ammonium phosphate. And the area above the push plate 2 is in a relatively gentle state, which is convenient for the reaction crystallization of the wastewater and the pyrolysis products of magnesium ammonium phosphate, improving the precipitation crystallization speed.

[0063] A discharge hole 15 is formed on the bottom wall of the mixing chamber 11. The discharge hole 15 extends in the vertical direction and is communicated with the discharge pipe 14. The central axis of the discharge hole 15 coincides with the central axis of the discharge pipe 14, and the diameter of the discharge hole 15 is larger than the diameter of the discharge pipe 14. A receiving groove 151 is formed by communicating the circumferential side walls of the discharge hole 15. The receiving groove 151 extends in the circumferential direction and surrounds the discharge hole 15.

[0064] Outlet holes 16 are formed on the circumferential side wall of the top of the mixing chamber 11. There are multiple outlet holes 16 and they are evenly spaced in the circumferential direction. A water delivery hole 161 is formed on the circumferential side wall of the receiving groove 151 away from the discharge hole 15. The water delivery hole 161 is located directly below the outlet hole 16 and corresponds one by one, and the water delivery hole 161 is communicated with the outlet hole 16.

[0065] The mixing cylinder 1 is provided with a filter screen 3. The filter screen 3 is located in the receiving groove 151 and surrounds the discharge hole 15. A sliding groove 19 is formed on the side wall of the mixing cylinder 1. The sliding groove 19 extends in the horizontal direction and communicates with the receiving groove 151. The mixing cylinder 1 is provided with a water filtering plate 31. The water filtering plate 31 is provided with water filtering holes 311. There are multiple water filtering holes 311 and they are evenly spaced. The water filtering plate 31 is slidably connected in the sliding groove 19. The filter screen 3 is fixedly connected to the top of the water filtering plate 31. The top of the filter screen 3 is in sliding contact with the top wall of the receiving groove 151 and the top wall of the sliding groove 19. During use, by sliding the water filtering plate 31, the filter screen 3 can be driven to slide out of the sliding groove 19.

[0066] See Figure 2 Referring to FIG. 4, one end of the water filtering plate 31 is fixedly connected with a blocking plate 32. A clamping groove 191 is formed on the side wall of the mixing cylinder 1. The clamping groove 191 surrounds the sliding groove 19 and communicates with it. And the clamping groove 191 is adapted to the blocking plate 32. When the water filtering plate 31 is slid into the sliding groove 19 until the blocking plate 32 is clamped into the clamping groove 191, the filter screen 3 moves into the receiving groove 151 and the filter screen 3 surrounds the discharge hole 15.

[0067] A sealing ring 35 is fixedly connected to the wall of the clamping groove 191. The sealing ring 35 surrounds the notch of the sliding groove 19. When the blocking plate 32 is clamped into the clamping groove 191, the sealing ring 35 abuts against the side wall of the blocking plate 32 to realize the seal between the blocking plate 32 and the wall of the clamping groove 191. A locking bar 33 is slidably connected to the outer wall of the mixing cylinder 1. A locking block 34 is fixedly connected to the side of the blocking plate 32 facing away from the water filtering plate 31. The locking block 34 is formed with a locking hole 341. The locking bar 33 slidably passes through the locking hole 341 to fix the blocking plate 32.

[0068] See Figure 2 And Figure 3 When the blocking plate 32 blocks the notch of the sliding groove 19 and the hydraulic cylinder 8 pushes the push plate 2 to move downward, the waste water enters the receiving groove 151 through the discharge hole 15. After being filtered by the filter screen 3, the waste water flows into the area between the top of the push plate 2 and the bottom wall of the mixing chamber 11 through the water delivery hole 161. At this time, the crystals in the waste water are filtered and remain in the area between the water filtering plate 31 and the filter screen 3. When the waste water in the mixing chamber 11 is discharged, the waste water is filtered by the water filtering plate 31 and discharged through the discharge hole 15. At this time, the water filtering plate 31 can be slid out to clean the crystals in the area between the water filtering plate 31 and the filter screen 3.

[0069] See Figure 5, a plurality of water inlets 17 are formed on the peripheral side wall of the top of the mixing chamber 11, and the water inlets 17 are evenly spaced along the circumferential direction, and the water inlets 17 and the water outlets 16 are arranged staggeredly. A drain port 18 is formed on the peripheral side wall of the bottom of the mixing chamber 11, and the drain port 18 corresponds to the water inlet 17 one by one, and the drain port 18 is directly below the water inlet 17. The mixing cylinder 1 is formed with a communication hole 181, and the two side orifices of the communication hole 181 communicate with the water inlet 17 and the drain port 18 respectively.

[0070] See Figure 5 And Figure 6 , the processing device further includes an annular partition 4 and a connecting component 5. The annular partition 4 is slidably connected up and down in the mixing chamber 11. The outer peripheral side wall of the annular partition 4 is in sliding contact with the peripheral side wall of the mixing chamber 11 up and down. The outer peripheral side wall of the push plate 2 is slidably connected to the inner peripheral side wall of the annular partition 4. An upper through hole 41 is formed on the peripheral side wall of the annular partition 4 and near the top position, and the upper through hole 41 corresponds to the water inlet 17 one by one. When the top of the annular partition 4 abuts against the top wall of the mixing chamber 11, the upper through hole 41 and the water inlet 17 are aligned and communicated with each other.

[0071] The connecting component 5 connects the annular partition 4 and the push plate 2. The connecting component 5 includes a connecting strip 51, a connecting spring 52, a connecting tooth 53 and a sliding tooth 54. A connecting groove 42 is formed on the inner peripheral side wall of the annular partition 4. The connecting groove 42 extends in the vertical direction. There are a plurality of connecting grooves 42 and they are evenly spaced along the circumferential direction. The connecting strip 51 slides in the connecting groove 42 along the direction close to or away from the push plate 2, and the peripheral side wall of the connecting strip 51 is in sliding contact with the peripheral side wall of the connecting groove 42. A plurality of connecting springs 52 are evenly spaced and installed in the connecting groove 42. One end of the connecting spring 52 is fixed to the side wall of the connecting strip 51 facing away from the push plate 2, and the other end is fixed to the side wall of the connecting groove 42 away from the groove opening. When the connecting spring 52 elastically releases, it pushes the connecting strip 51 to slide in the direction close to the push plate 2.

[0072] The connecting tooth 53 is fixedly connected to the side of the connecting strip 51 facing the push plate 2. There are a plurality of connecting teeth 53 and they are evenly spaced up and down. The sliding tooth 54 is fixedly connected to the outer wall of the push plate 2. The sliding tooth 54 corresponds to the connecting groove 42 one by one. The sliding tooth 54 slides up and down in the connecting groove 42, and the sliding tooth 54 meshes with the connecting tooth 53. When the push plate 2 moves up and down, the sliding tooth 54 supports the connecting tooth 53 and drives the annular partition 4 to move up and down. When the end of the annular partition 4 abuts against the chamber wall of the mixing chamber 11, the sliding tooth 54 slides on the connecting tooth 53. When the sliding tooth 54 slides to the next adjacent connecting tooth 53, the sliding tooth 54 pushes the connecting strip 51 in the direction away from the push plate 2, and at this time the connecting spring 52 is in a compressed state; when the sliding tooth 54 moves to the next adjacent connecting tooth 53, the connecting spring 52 pushes the connecting strip 51 in the direction of the push plate 2 to keep the sliding tooth 54 and the connecting tooth 53 in a meshing state.

[0073] An installation groove communicating with the discharge hole 15 is formed in the mixing cylinder 1. The mixing cylinder 1 is provided with a water isolation plate 6, and the water isolation plate 6 is slidably connected in the installation groove. The mixing cylinder 1 is provided with a power assembly 7, and the power assembly 7 includes a power rope 71, a power column 72 and a power spring 73. The power spring 73 is installed in the installation groove. One end of the power spring 73 is fixedly connected to the end of the water isolation plate 6, and the other end is fixedly connected to the groove wall on the side of the installation groove away from the discharge hole 15. The power column 72 is fixedly connected to the bottom of the annular partition plate 4, and the power column 72 slides up and down in the mixing cylinder 1. The power rope 71 slidably passes through the mixing cylinder 1. One end of the power rope 71 passes through the power spring 73 and is fixedly connected to the water isolation plate 6, and the other end is fixed to the outer peripheral side of the power column 72. When the annular partition plate 4 slides down to abut against the bottom wall of the mixing chamber 11, the power column 72 pulls the power rope 71. At this time, the power rope 71 drives the water isolation plate 6 to slide into the installation groove, opening the discharge hole 15. When the annular partition plate 4 moves upward, the power rope 71 enters a loose state. At this time, the power spring 73 elastically releases, pushing the water isolation plate 6 to block the discharge hole 15.

[0074] When the push plate 2 moves upward, the push plate 2 drives the annular partition plate 4 to move upward to abut against the top wall of the mixing chamber 11. At this time, the water inlet 17 communicates with the upper through hole 41, and at the same time, the annular partition plate 4 blocks the water outlet 16, and the water isolation plate 6 blocks the discharge hole 15. Then when the push plate 2 continues to move upward, the push plate 2 and the annular partition plate 4 slide relative to each other. The water flow above the push plate 2 enters through the water inlet 17 and then is discharged through the drain port 18. When the push plate 2 moves downward, the push plate 2 drives the annular partition plate 4 to move downward to abut against the bottom wall of the mixing chamber 11. At this time, the annular partition plate 4 blocks the drain port 18, and the water isolation plate 6 opens the discharge hole 15. Then when the push plate 2 continues to move downward, the push plate 2 and the annular partition plate 4 slide relative to each other. The waste water below the push plate 2 can enter the water delivery hole 161 (the water delivery hole 161 is marked in Figure 3 the figure), and then is discharged from the water outlet 16.

[0075] The implementation principle of the treatment equipment for refractory and high-total-nitrogen wastewater in the embodiment of the present application is as follows:

[0076] During mixing, the hydraulic cylinder 8 is activated to drive the push plate 2 to move downward. At this time, the wastewater below the push plate 2 is squeezed through the overflow holes 21 into the area formed above the push plate 2 and the wall of the mixing chamber 11, and a circulating flow of wastewater is formed. At the same time, the wastewater below the push plate 2 is discharged through the water outlet 16 and is relatively evenly mixed with the circulating wastewater above the push plate 2; while the wastewater below the push plate 2 is in a relatively gentle state, which is conducive to the reaction crystallization of the wastewater with the pyrolysis products of magnesium ammonium phosphate, improving the precipitation crystallization speed. And so on, when the hydraulic cylinder 8 drives the push plate 2 to move upward, the wastewater above the push plate 2 flows downward through the overflow holes 21 and is squeezed into the area between the bottom of the push plate 2 and the bottom wall of the mixing chamber 11, and a circulating flow is formed. Moreover, the wastewater above the push plate 2 can enter the water inlet 17, then be discharged from the water outlet 16 and is relatively evenly mixed with the wastewater formed below the push plate 2; while the area above the push plate 2 is in a relatively gentle state, facilitating the reaction crystallization of the wastewater with the pyrolysis products of magnesium ammonium phosphate and improving the precipitation crystallization speed.

[0077] The above are all preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A treatment device for refractory and high-total-nitrogen wastewater, characterized in that: including a mixing cylinder, a mixing cavity is formed inside the mixing cylinder, a water inlet pipe and a feeding pipe are arranged at the top of the mixing cylinder, a discharge pipe is arranged at the bottom of the mixing cavity, and the water inlet pipe, the feeding pipe and the discharge pipe are respectively communicated with the mixing cavity; a push plate, which is slidably connected up and down inside the mixing cavity; a driving member, which is arranged on the mixing cylinder, and the driving member drives the push plate to move up and down; a discharge hole communicated with the discharge pipe is formed on the bottom cavity wall of the mixing cavity, and a receiving groove is formed by communicating the peripheral hole walls of the discharge hole; a plurality of water outlet holes are formed at intervals along the circumferential direction on the peripheral cavity wall at the top of the mixing cavity, a water delivery hole corresponding to and communicated with each water outlet hole is formed on the peripheral groove wall of the receiving groove far away from the discharge hole, and a filter screen located in the receiving groove and surrounding the discharge hole is formed on the mixing cylinder; a water inlet is formed on the peripheral cavity wall at the top of the mixing cavity and is arranged in a staggered manner with the water outlet, a drain outlet corresponding to each water inlet is formed on the peripheral cavity wall at the bottom of the mixing cavity, and a communication hole communicating the water inlet and the drain outlet is formed on the mixing cylinder; an annular partition plate, which is slidably arranged up and down inside the mixing cavity, the outer peripheral side wall of the annular partition plate is in sliding contact with the peripheral cavity wall of the mixing cavity up and down, and the outer peripheral side of the push plate is slidably connected to the inner peripheral side wall of the annular partition plate; the annular partition plate is formed with upper through holes corresponding to each water inlet one by one, and when the annular partition plate abuts against the top cavity wall of the mixing cavity, the upper through holes are communicated with the water inlets; a connecting component, which connects the push plate and the annular partition plate, when the push plate moves downward, the connecting component drives the annular partition plate to move downward until it abuts against the bottom cavity wall of the mixing cavity, and then the connecting component controls the relative sliding of the push plate and the annular partition plate; when the push plate moves upward, the connecting component drives the annular partition plate to move upward until it abuts against the top cavity wall of the mixing cavity, and then the connecting component controls the relative sliding of the push plate and the annular partition plate; a water isolation plate for blocking the discharge hole is slidably connected to the mixing cylinder, and a power component is arranged on the mixing cylinder; when the annular partition plate abuts against the bottom cavity wall of the mixing cavity, the power component controls the water isolation plate to open the discharge hole; when the annular partition plate abuts against the top cavity wall of the mixing cavity, the power component controls the water isolation plate to block the discharge hole.

2. The treatment equipment for refractory and high-total-nitrogen wastewater according to claim 1, characterized in that: The connecting component includes a connecting strip, a connecting spring, connecting teeth and sliding teeth; a connecting groove extending in the vertical direction is formed on the inner peripheral side wall of the annular partition plate, the connecting strip is slidably connected to the connecting groove, the connecting spring is arranged in the connecting groove, and the connecting spring pushes the connecting strip to slide towards the direction close to the push plate; the connecting teeth are arranged on the side of the connecting strip facing the push plate, and there are a plurality of connecting teeth which are evenly spaced up and down; the sliding teeth are arranged on the outer wall of the push plate and are slidably connected up and down in the connecting groove, and the sliding teeth are meshed with the connecting teeth; when the end of the annular partition plate abuts against the cavity wall of the mixing cavity and the push plate slides up and down, the sliding teeth are slidably connected to the connecting teeth.

3. The treatment equipment for refractory and high-total-nitrogen wastewater according to claim 1, wherein: The driving member is a hydraulic cylinder, which is arranged on the outer wall of the top of the mixing cylinder. The piston rod of the hydraulic cylinder is connected to the top of the push plate, and the piston rod of the hydraulic cylinder is connected to the mixing cylinder by sliding up and down.

4. The treatment equipment for refractory and high-total-nitrogen wastewater according to claim 1, characterized in that: The outer peripheral side wall of the push plate is formed with overflow holes extending in the vertical direction, and there are a plurality of overflow holes which are evenly spaced along the circumferential direction.

5. The treatment equipment for refractory and high-total-nitrogen wastewater according to claim 1, wherein: The side wall of the mixing cylinder is formed with a slide groove connected with the containing groove, and the mixing cylinder is provided with a water filter plate, and a plurality of water filter holes are formed on the water filter plate at even intervals; The water filter plate is slidably connected to the chute, the filter screen is arranged on the top of the water filter plate, the side wall of the water filter plate is provided with a blocking plate, and the side wall of the mixing cylinder is formed with a clamping groove which is connected with the chute and adapted to the blocking plate; When the blocking plate is inserted into the clamping groove, the blocking plate blocks the slot opening of the sliding groove.

6. The treatment device for refractory and high-total-nitrogen wastewater according to claim 5, wherein: The outer wall of the mixing cylinder is slidably connected with a locking strip, and the sealing plate is provided with a locking block on the side facing away from the water filter plate, and the locking block is formed with a locking hole for the locking strip to slide through.

7. A treatment device for refractory and high-total-nitrogen wastewater according to claim 5, characterized in that: The wall of the clamping groove is provided with a sealing ring surrounding the slot opening of the slide groove. When the blocking plate is clamped into the clamping groove, the sealing ring abuts against the side wall of the blocking plate.

8. A treatment device for refractory and high-total-nitrogen wastewater according to claim 1, characterized in that: The power assembly includes a power rope, a power column and a power spring; The power spring is arranged in the mixing cylinder, and the mixing cylinder pushes the water blocking plate to block the drain hole; The power column is arranged at the bottom of the annular baffle, the power column slides up and down on the mixing cylinder, the power rope is slidably passed through the mixing cylinder, and the two ends of the power rope are respectively connected to the baffle and the power column; When the annular baffle abuts against the bottom wall of the mixing chamber, the power rope pulls the baffle to open the discharge hole; When the annular partition abuts against the top wall of the mixing chamber, the power spring pushes the water barrier to block the drain hole.

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