Treatment equipment for degradation-resistant and high-total-nitrogen wastewater

Abstract

The invention discloses treatment equipment for degradation-resistant and high-total-nitrogen wastewater, and relates to the technical field of wastewater treatment equipment.The treatment equipment comprises a mixing barrel, a mixing cavity is formed in the mixing barrel, a water inlet pipe and a feeding pipe are arranged at the top of the mixing barrel, and a discharging pipe is arranged at the bottom of the mixing cavity; the push plate is connected into the mixing cavity in an up-down sliding manner; the driving part drives the push plate to move up and down; a drain hole is formed in the bottom cavity wall of the mixing cavity; a water outlet is formed in the peripheral cavity wall of the top of the mixing cavity; a filter screen is formed on the mixing barrel; a water inlet is formed in the peripheral cavity wall of the top of the mixing cavity, a water outlet is formed in the peripheral cavity wall of the bottom of the mixing cavity, and a communicating hole is formed in the mixing cylinder; an annular partition plate; when the annular partition plate abuts against the top cavity wall of the mixing cavity, the upper through hole is communicated with the water inlet; the connecting assembly is connected with the push plate and the annular partition plate; the mixing cylinder is in sliding connection with a water-stop sheet for blocking the drain hole, and the mixing cylinder is provided with a power assembly. The mixing device can maintain the crystallization effect while improving the mixing 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: A treatment device for difficult-to-degrade, high-total nitrogen wastewater, comprising 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; A push plate, slidably connected to the mixing chamber up and down; A driving member, disposed on the mixing cylinder, and driving the push plate to move up and down; A discharge hole connected to the discharge pipe is formed on the bottom wall of the mixing chamber, and a receiving groove is formed on the side wall of the discharge hole; The top peripheral wall of the mixing chamber is formed with a plurality of water outlets at intervals along the circumferential direction, the peripheral wall of the receiving groove away from the discharge hole is formed with water delivery holes corresponding to and connected with the water outlets one by one, and the mixing cylinder is formed with a filter screen located in the receiving groove and surrounding the discharge hole; The top peripheral wall of the mixing chamber is formed with water inlets arranged alternately with the water outlets, the bottom peripheral wall of the mixing chamber is formed with water outlets corresponding one to one with the water inlets, and the mixing cylinder is formed with a connecting hole connecting the water inlets and the water outlets; An annular partition plate is slidably disposed in the mixing chamber, the outer peripheral side wall of the annular partition plate is in upward and downward sliding contact with the peripheral side wall of the mixing chamber, 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 is formed with upper through holes corresponding to the water inlets one by one, and when the annular partition abuts against the top wall of the mixing chamber, the upper through holes are connected to the water inlets; A connecting assembly, connecting the push plate and the annular baffle, when the push plate moves downward, the connecting assembly drives the annular baffle to move downward until it abuts against the bottom wall of the mixing chamber, and then the connecting assembly controls the push plate and the annular baffle to slide relative to each other; When the push plate moves upward, the connecting assembly drives the annular partition plate to move upward until it abuts against the top wall of the mixing chamber, and then the connecting assembly controls the push plate and the annular partition plate to slide relative to each other; The mixing cylinder is slidably connected with a water blocking plate for blocking the drain hole, and the mixing cylinder is provided with a power assembly; When the annular baffle abuts against the bottom wall of the mixing chamber, the power assembly controls the baffle to open the drain hole; When the annular baffle abuts against the top wall of the mixing chamber, the power assembly controls the baffle to open the drain hole.

[0007] By adopting the above technical solution, during mixing, the driving member drives the push plate to move downward, at which time the wastewater below the push plate is squeezed into the area above the push plate and the wall of the mixing chamber through the overflow hole, and squeezed into the wastewater to form a circulation, and at the same time, the wastewater below the push plate is discharged through the outlet, and mixed relatively evenly with the wastewater forming the circulation above the push plate; and the wastewater below the push plate is in a relatively relaxed state, which is conducive to the reaction and crystallization of the wastewater and the pyrolysis products of magnesium ammonium phosphate, and improves the precipitation crystallization rate. By analogy, when the driving member drives the push plate to move upward, the wastewater above the push plate flows downward through the overflow hole and squeezes into the area between the bottom of the push plate and the wall of the bottom of the mixing chamber, and forms a circulation, and the wastewater above the push plate can enter the water inlet, and then be discharged from the outlet and relatively evenly mixed with the wastewater formed below the push plate; and the top of the push plate is in a relatively relaxed state, which is convenient for the wastewater to react and crystallize with the pyrolysis products of magnesium ammonium phosphate, and improves the precipitation crystallization rate.

[0008] Optionally, the connecting assembly includes a connecting strip, a connecting spring, a connecting tooth and a sliding tooth; The inner peripheral side wall of the annular partition is formed with a connecting groove extending in the vertical direction, 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 toward 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 in the connecting groove up and down, and the sliding teeth are meshed with the connecting teeth; The end of the annular partition plate abuts against the wall of the mixing chamber, and when the push plate slides up and down, the sliding teeth are slidably connected to the connecting teeth.

[0009] By adopting the above technical solution, the connection assembly can effectively control the relative movement between the push plate and the annular partition, ensuring that the annular partition can synchronously follow or slide relative to each other during the up and down sliding process of the push plate. Specifically, the design of the connecting strip and the connecting spring enables the connecting strip to slide freely in the connecting groove and always maintain close contact with the push plate, thereby ensuring the stable engagement of the connecting teeth and the sliding teeth. When the end of the annular partition abuts against the wall of the mixing chamber and the push plate moves up and down, the sliding teeth will slide along the connecting teeth, thereby realizing the coordinated action of the annular partition and the push plate, ensuring that the actions of various components of the entire device are coordinated during operation, thereby improving the reliability and stability of the equipment.

[0010] Optionally, the driving member is a hydraulic cylinder, which is arranged on the outer wall of the top of the mixing cylinder, and 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.

[0011] By adopting the above technical solution and using the hydraulic cylinder as a driving member, the up and down movement of the push plate can be accurately controlled to ensure that the push plate can move up and down smoothly during the mixing process, thereby improving the mixing effect.

[0012] Optionally, the outer peripheral side wall of the push plate is formed with overflow holes extending in the vertical direction, and there are multiple overflow holes that are evenly spaced along the circumferential direction.

[0013] By adopting the above technical solution, when the push plate squeezes the wastewater, the wastewater can pass through the overflow hole, so that the wastewater forms a circulation, thereby improving the mixing effect of the wastewater.

[0014] Optionally, a sliding groove connected to the containing groove is formed on the side wall of the mixing cylinder, 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.

[0015] By adopting the above technical solution, the crystals in the wastewater are collected by the cooperation of the water filter plate and the filter net, so that the crystals in the wastewater can be recycled and reused conveniently.

[0016] Optionally, a locking strip is slidably connected to the outer wall of the mixing cylinder, a locking block is provided on the side of the sealing plate facing away from the water filter plate, and the locking block is formed with a locking hole for the locking strip to slide through.

[0017] 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 filter plate and improving the operating stability of the entire equipment.

[0018] Optionally, the wall of the snap-fit ​​groove is provided with a sealing ring surrounding the slot opening of the slide groove, and when the blocking plate is inserted into the snap-fit ​​groove, the sealing ring abuts against the side wall of the blocking plate.

[0019] By adopting the above technical solution, when the sealing plate is inserted into the clamping groove, the sealing ring abuts against the side wall of the sealing plate, thereby effectively reducing the possibility of wastewater leakage.

[0020] Optionally, 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.

[0021] By adopting the above technical solution, when the annular baffle abuts against the bottom wall of the mixing chamber, the power rope pulls the water-blocking plate to open the discharge hole, so that the mixed wastewater can be discharged smoothly; when the annular baffle abuts against the top wall of the mixing chamber, the power spring pushes the water-blocking plate to block the discharge hole, limiting the wastewater from entering from the outlet and then being discharged into the mixing chamber from the discharge hole.

[0022] In summary, the present application includes at least one of the following beneficial effects: 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; 2. When the push plate squeezes the wastewater, the wastewater can pass through the overflow hole, causing the wastewater to form a circulation and improve the mixing effect of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the external structure of an embodiment of the present application; Figure 2 is a schematic diagram of an internal cross-section of an embodiment of the present application; Figure 3 is a schematic diagram of the internal cross section of a mixing cylinder in an embodiment of the present application; Figure 4 yes Figure 1 A magnified schematic diagram of part A; Figure 5 This is a schematic diagram of the state when the annular partition blocks the drain outlet in the embodiment of the present application; Figure 6 yes Figure 2 An enlarged schematic diagram of part B.

[0024] Figure numerals: 1. mixing barrel; 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. discharge outlet; 181. connecting hole; 19. slide groove; 191. snap-in groove; 2. push plate; 21. overflow hole; 3. filter net; 31. water filter plate; 311. water filter hole; 32. sealing plate; 33. locking strip; 34. locking block; 341. locking hole; 35. sealing ring; 4. annular partition; 41. upper through hole; 42. connecting groove; 5. connecting assembly; 51. connecting strip; 52. connecting spring; 53. connecting tooth; 54. sliding tooth; 6. water-blocking plate; 7. power assembly; 71. power rope; 72. power column; 73. power spring; 8. hydraulic cylinder. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-6 This application is described in further detail.

[0026] The embodiment of the present application discloses a treatment device for difficult-to-degrade, high-total nitrogen wastewater.

[0027] See also Figure 1 and Figure 2 The embodiment of the present application provides a treatment device for difficult-to-degrade, high-total nitrogen wastewater, comprising a mixing barrel 1, a push plate 2 and a driving member, wherein the mixing barrel 1 is a cylindrical structure, and a mixing chamber 11 is formed in the mixing barrel 1. A water inlet pipe 12 and a feed pipe 13 are fixedly connected to the top of the mixing barrel 1, and a discharge pipe 14 is fixedly connected to the bottom of the mixing chamber 11, and the water inlet pipe 12, the feed pipe 13 and the discharge pipe 14 are respectively connected to the mixing chamber 11.

[0028] When in 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 introduced 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 barrel 1 can be stainless steel or carbon steel, which has high corrosion resistance and strength and is suitable for various industrial environments.

[0029] The push plate 2 is slidably connected to the mixing chamber 11. The push plate 2 is made of aluminum alloy, has low density and high corrosion resistance, and can be used for a long time in a harsh working environment. The push plate 2 is 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 anodized to further enhance its corrosion resistance and wear resistance.

[0030] The driving member is arranged on the mixing barrel 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 mounted on the top outer wall of the mixing barrel 1, and 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 barrel 1 up and down.

[0031] See also Figure 2 and Figure 3 , the outer peripheral side wall of the push plate 2 is formed with overflow holes 21, which extend in the vertical direction, and there are multiple overflow holes 21 and are evenly spaced along the circumference. During mixing, the hydraulic cylinder 8 is started to drive the push plate 2 to move downward, and at this time, the wastewater below the push plate 2 is squeezed into the area 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 large, which can accelerate the wastewater to flow into the area above the push plate 2 and the wall of the mixing chamber 11, thereby improving the degree of wastewater mixing; and when the wastewater flows upward through the overflow holes 21, the wastewater flows along the side walls of the mixing chamber 11, until it hits the top wall of the mixing chamber 11, and the water flows along the top wall of the mixing chamber 11 to the middle position; then the water flows that merge and collide at the middle position of the top wall of the mixing chamber 11 flow downward, and when it hits the top downward, the water flows impact the side walls of the mixing chamber 11, so that the water flows form a circulation, thereby improving the degree of water mixing. The wastewater below the push plate 2 is in a relatively mild state, which is conducive to the reaction and crystallization of the wastewater and the pyrolysis products of magnesium ammonium phosphate, thereby increasing the precipitation and crystallization speed. By analogy, 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 hole 21 and squeezes 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, while the area above the push plate 2 is in a relatively mild state, which is convenient for the reaction and crystallization of the wastewater and the pyrolysis products of magnesium ammonium phosphate, thereby increasing the precipitation and crystallization speed.

[0032] A drainage hole 15 is formed on the bottom wall of the mixing chamber 11. The drainage hole 15 extends in the vertical direction and is connected to the drainage pipe 14. The central axis of the drainage hole 15 coincides with the central axis of the drainage pipe 14, and the diameter of the drainage hole 15 is larger than the diameter of the drainage pipe 14. A receiving groove 151 is formed on the peripheral wall of the drainage hole 15. The receiving groove 151 extends in the circumferential direction and surrounds the drainage hole 15.

[0033] The top peripheral wall of the mixing chamber 11 is formed with a water outlet 16, and there are multiple water outlets 16 that are evenly spaced along the circumference. The peripheral wall of the receiving groove 151 away from the discharge hole 15 is formed with a water delivery hole 161, which is located directly below the water outlet 16 and corresponds one to one, and the water delivery hole 161 and the water outlet 16 are connected to each other.

[0034] The mixing drum 1 is provided with a filter screen 3, which is located in the receiving groove 151 and is arranged around the discharge hole 15. A chute 19 is formed on the side wall of the mixing drum 1, and the chute 19 extends in the horizontal direction and is connected with the receiving groove 151. The mixing drum 1 is provided with a water filter plate 31, and the water filter plate 31 has a plurality of water filter holes 311, and the water filter holes 311 are evenly spaced. The water filter plate 31 is slidably connected in the chute 19, and the filter screen 3 is fixedly connected to the top of the water filter plate 31, and the top of the filter screen 3 is in sliding contact with the top groove wall of the receiving groove 151 and the top groove wall of the chute 19. When in use, the filter screen 3 can be driven to slide out of the chute 19 by sliding the water filter plate 31.

[0035] See also Figure 2 As shown in FIG4 , one end of the water filter plate 31 is fixedly connected to the plugging plate 32, and a clamping groove 191 is formed on the side wall of the mixing barrel 1. The clamping groove 191 surrounds the chute 19 and is connected, and the clamping groove 191 is adapted to the plugging plate 32. When the water filter plate 31 is slid into the chute 19 until the plugging 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.

[0036] The wall of the clamping groove 191 is fixedly connected with a sealing ring 35, and the sealing ring 35 is arranged around the notch of the slide 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, so as to achieve the seal between the blocking plate 32 and the wall of the clamping groove 191. The outer wall of the mixing cylinder 1 is slidably connected with a locking strip 33, and the side of the blocking plate 32 facing away from the water filter plate 31 is fixedly connected with a locking block 34, and the locking block 34 is formed with a locking hole 341, and the locking strip 33 slides through the locking hole 341 to fix the blocking plate 32.

[0037] See also Figure 2 and Figure 3 When the blocking plate 32 blocks the notch of the slide 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, and after being filtered by the filter screen 3, the waste water flows from the water outlet 16 into the area of ​​the top of the push plate 2 and the bottom wall of the mixing chamber 11 after passing 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 filter 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 filter plate 31 and discharged from the discharge hole 15. At this time, the water filter plate 31 can be slid out to clean the crystals in the area between the water filter plate 31 and the filter screen 3.

[0038] See also Figure 5A water inlet 17 is formed on the circumferential wall of the top of the mixing chamber 11. There are multiple water inlets 17 and they are evenly spaced along the circumferential direction. The water inlets 17 and the water outlets 16 are staggered. A drain port 18 is formed on the circumferential wall of the bottom of the mixing chamber 11. The drain port 18 corresponds to the water inlet 17 one by one, and the drain port 18 is located directly below the water inlet 17. The mixing barrel 1 is formed with a connecting hole 181. The two side openings of the connecting hole 181 are connected to the water inlet 17 and the drain port 18 respectively.

[0039] See also Figure 5 and Figure 6 The treatment device further includes an annular baffle 4 and a connecting assembly 5. The annular baffle 4 is slidably connected to the mixing chamber 11 up and down. The outer peripheral side wall of the annular baffle 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 baffle 4. An upper through hole 41 is formed on the peripheral side wall of the annular baffle 4 near the top. The upper through hole 41 corresponds to the water inlet 17 one by one. When the top of the annular baffle 4 abuts against the top wall of the mixing chamber 11, the upper through hole 41 and the water inlet 17 are aligned with each other and connected.

[0040] The connecting assembly 5 connects the annular partition 4 and the push plate 2, and the connecting assembly 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, and the connecting groove 42 extends in the vertical direction. There are multiple connecting grooves 42 and they are evenly spaced along the circumference. The connecting strip 51 slides in the connecting groove 42 in 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 groove wall of the connecting groove 42. There are multiple connecting springs 52 and they 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 groove wall of the connecting groove 42 away from the notch. When the connecting spring 52 is elastically released, it pushes the connecting strip 51 to slide in the direction close to the push plate 2.

[0041] The connecting teeth 53 are fixedly connected to the side of the connecting strip 51 facing the push plate 2, and there are multiple connecting teeth 53 and they are evenly spaced up and down. The sliding teeth 54 are fixedly connected to the outer wall of the push plate 2, and the sliding teeth 54 correspond to the connecting grooves 42 one by one. The sliding teeth 54 are connected to the connecting grooves 42 by sliding up and down, and the sliding teeth 54 are meshed with the connecting teeth 53. When the push plate 2 moves up and down, the sliding teeth 54 support the connecting teeth 53, driving the annular partition 4 to move up and down. When the end of the annular partition 4 abuts against the cavity wall of the mixing chamber 11, the sliding teeth 54 slide on the connecting teeth 53, and when the sliding teeth 54 slide toward the next adjacent connecting teeth 53, the sliding teeth 54 push the connecting strip 51 in the direction away from the push plate 2, and the connecting spring 52 is in a compressed state; when the sliding teeth 54 move to the next adjacent connecting teeth 53, the connecting spring 52 pushes the connecting strip 51 to move in the direction of the push plate 2, and keeps the sliding teeth 54 meshed with the connecting teeth 53.

[0042] A mounting groove connected to the drain hole 15 is formed in the mixing drum 1, and a water baffle 6 is provided in the mixing drum 1, and the water baffle 6 is slidably connected in the mounting groove. The mixing drum 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 mounting groove, and one end of the power spring 73 is fixedly connected to the end of the water baffle 6, and the other end is fixedly connected to the groove wall of the mounting groove away from the drain hole 15. The power column 72 is fixedly connected to the bottom of the annular partition 4, and the power column 72 slides up and down in the mixing drum 1. The power rope 71 is slidably penetrated in the mixing drum 1, and one end of the power rope 71 passes through the power spring 73 and is connected and fixed to the water baffle 6, and the other end is fixed to the outer peripheral side of the power column 72. When the annular partition 4 slides downward to abut the bottom wall of the mixing chamber 11, the power column 72 pulls the power rope 71, and at this time, the power rope 71 drives the water baffle 6 to slide into the mounting groove to open the drain hole 15. When the annular partition 4 moves upward, the power rope 71 enters a loose state, at which time the power spring 73 is elastically released to push the water-blocking plate 6 to block the drain hole 15 .

[0043] When the push plate 2 moves upward, the push plate 2 drives the annular baffle 4 to move upward until it abuts against the top wall of the mixing chamber 11. At this time, the water inlet 17 is connected to the upper through hole 41. At the same time, the annular baffle 4 blocks the water outlet 16, and the baffle 6 blocks the drain hole 15. Then, when the push plate 2 continues to move upward, the push plate 2 and the annular baffle 4 slide relative to each other, and the water flow above the push plate 2 enters through the water inlet 17 and is discharged through the drain port 18. When the push plate 2 moves downward, the push plate 2 drives the annular baffle 4 to move downward until it abuts against the bottom wall of the mixing chamber 11. At this time, the annular baffle 4 blocks the drain port 18, and the baffle 6 opens the drain hole 15. Then, when the push plate 2 continues to move downward, the push plate 2 and the annular baffle 4 slide relative to each other, and the wastewater below the push plate 2 can enter the water delivery hole 161 (the water delivery hole 161 is in Figure 3 The water is then discharged from the water outlet 16.

[0044] The implementation principle of a treatment device for difficult-to-degrade, high-total nitrogen wastewater in the present application embodiment is as follows: 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 above the push plate 2 and the wall of the mixing chamber 11 through the overflow hole 21, and the squeezed wastewater forms a circulation. 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 wastewater forming the circulation above the push plate 2; and the wastewater below the push plate 2 is in a relatively mild state, which is conducive to the reaction and crystallization of the wastewater and the thermal decomposition product of magnesium ammonium phosphate, thereby improving the precipitation crystallization speed. By analogy, 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 hole 21 and squeezes into the area between the bottom of the push plate 2 and the bottom wall of the mixing chamber 11, and forms a circulation, and the wastewater above the push plate 2 can enter the water inlet 17, and then be discharged from the water outlet 16 and relatively evenly mixed with the wastewater below the push plate 2; and the area above the push plate 2 is in a relatively relaxed state, which facilitates the reaction and crystallization of the wastewater and the thermal decomposition products of magnesium ammonium phosphate, thereby increasing the precipitation crystallization rate.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A treatment device for difficult-to-degrade, high-total nitrogen wastewater, characterized by: include A mixing cylinder (1), wherein a mixing chamber (11) is formed in the mixing cylinder (1), a water inlet pipe (12) and a material feed pipe (13) are arranged at the top of the mixing cylinder (1), and a discharge pipe (14) is arranged at the bottom of the mixing chamber (11), and the water inlet pipe (12), the material feed pipe (13) and the discharge pipe (14) are respectively connected to the mixing chamber (11); A push plate (2) slidably connected to the mixing chamber (11) up and down; A driving member, disposed on the mixing barrel (1), the driving member driving the push plate (2) to move up and down; A discharge hole (15) communicating with the discharge pipe (14) is formed on the bottom wall of the mixing chamber (11), and a receiving groove (151) is formed on the side wall of the discharge hole (15); The mixing chamber (11) has a plurality of water outlets (16) formed at intervals along the circumferential direction on the circumferential side wall of the top portion thereof; the circumferential side wall of the containing groove (151) away from the discharge hole (15) has water delivery holes (161) corresponding to and communicating with the water outlets (16) in a one-to-one manner; and the mixing cylinder (1) has a filter screen (3) located in the containing groove (151) and surrounding the discharge hole (15); The top peripheral wall of the mixing chamber (11) is formed with water inlets (17) arranged alternately with the water outlets (16); the bottom peripheral wall of the mixing chamber (11) is formed with water outlets (18) corresponding one-to-one with the water inlets (17); the mixing cylinder (1) is formed with a connecting hole (181) connecting the water inlets (17) and the water outlets (18); An annular partition (4) is slidably disposed in the mixing chamber (11) up and down, 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, and the outer peripheral side of the push plate (2) is slidably connected to the inner peripheral side wall of the annular partition (4); The annular partition (4) is formed with upper through holes (41) corresponding one to one with the water inlets (17); when the annular partition (4) abuts against the top wall of the mixing chamber (11), the upper through holes (41) are connected to the water inlets (17); a connecting assembly (5) connecting the push plate (2) and the annular baffle (4); when the push plate (2) moves downward, the connecting assembly (5) drives the annular baffle (4) to move downward until it abuts against the bottom wall of the mixing chamber (11); and then the connecting assembly (5) controls the push plate (2) and the annular baffle (4) to slide relative to each other; When the push plate (2) moves upward, the connecting component (5) drives the annular partition plate (4) to move upward until it abuts against the top wall of the mixing chamber (11), and then the connecting component (5) controls the push plate (2) and the annular partition plate (4) to slide relative to each other; The mixing cylinder (1) is slidably connected to a water blocking plate (6) for blocking the drain hole (15), and the mixing cylinder (1) is provided with a power assembly (7); When the annular baffle (4) abuts against the bottom wall of the mixing chamber (11), the power assembly (7) controls the water baffle (6) to open the drainage hole (15); When the annular baffle (4) abuts against the top wall of the mixing chamber (11), the power assembly (7) controls the water baffle (6) to open the discharge hole (15).

2. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 1, characterized in that: The connecting assembly (5) comprises a connecting strip (51), a connecting spring (52), a connecting tooth (53) and a sliding tooth (54); The inner peripheral side wall of the annular partition (4) is formed with a connecting groove (42) extending in the vertical direction, the connecting strip (51) is slidably connected to the connecting groove (42), the connecting spring (52) is arranged in the connecting groove (42), and the connecting spring (52) pushes the connecting strip (51) to slide in a direction close to the push plate (2); The connecting teeth (53) are arranged on a side of the connecting strip (51) facing the push plate (2), and there are a plurality of connecting teeth (53) which are evenly spaced up and down; The sliding teeth (54) are arranged on the outer wall of the push plate (2) and are slidably connected in the connecting groove (42) up and down, and the sliding teeth (54) are meshed with the connecting teeth (53); The end of the annular partition plate (4) abuts against the wall of the mixing chamber (11), and when the push plate (2) slides up and down, the sliding teeth (54) are slidably connected to the connecting teeth (53).

3. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 1, characterized in that: The driving member is a hydraulic cylinder (8), the hydraulic cylinder (8) is arranged on the outer wall of the top of the mixing cylinder (1), the piston rod of the hydraulic cylinder (8) is connected to the top of the push plate (2), and the piston rod of the hydraulic cylinder (8) is connected to the mixing cylinder (1) in an up-and-down sliding manner.

4. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 1, characterized in that: The outer peripheral side wall of the push plate (2) is formed with overflow holes (21) extending in the vertical direction, and there are a plurality of overflow holes (21) which are evenly spaced along the circumference.

5. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 1, characterized in that: The side wall of the mixing cylinder (1) is formed with a slide groove (19) which is connected to the containing groove (151); the mixing cylinder (1) is provided with a water filter plate (31); and a plurality of water filter holes (311) are formed on the water filter plate (31) at even intervals. The water filter plate (31) is slidably connected to the slide groove (19), the filter screen (3) is arranged on the top of the water filter plate (31), a sealing plate (32) is arranged on the side wall of the water filter plate (31), and a clamping groove (191) is formed on the side wall of the mixing cylinder (1) and is connected to the slide groove (19) and is adapted to the sealing plate (32); When the blocking plate (32) is snapped into the snap-fitting groove (191), the blocking plate (32) blocks the notch of the sliding groove (19).

6. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 5, characterized in that: The outer wall of the mixing cylinder (1) is slidably connected with a locking strip (33), and a locking block (34) is provided on the side of the blocking plate (32) facing away from the water filter plate (31), wherein the locking block (34) is formed with a locking hole (341) for the locking strip (33) to slide through.

7. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 5, characterized in that: The groove wall of the clamping groove (191) is provided with a sealing ring (35) surrounding the groove opening of the slide 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).

8. The treatment equipment for difficult-to-degrade, high-total nitrogen wastewater according to claim 1, characterized in that: The power assembly (7) comprises a power rope (71), a power column (72) and a power spring (73); The power spring (73) is arranged in the mixing cylinder (1), and the mixing cylinder (1) pushes the water blocking plate (6) to block the drain hole (15); The power column (72) is arranged at the bottom of the annular baffle (4), the power column (72) slides up and down on the mixing cylinder (1), the power rope (71) slides through the mixing cylinder (1), and the two ends of the power rope (71) are respectively connected to the water baffle (6) and the power column (72); When the annular baffle (4) abuts against the bottom wall of the mixing chamber (11), the power rope (71) pulls the water baffle (6) to open the drainage hole (15); When the annular partition plate (4) abuts against the top wall of the mixing chamber (11), the power spring (73) pushes the water barrier plate (6) to block the drainage hole (15).

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