Device for preventing loss of anaerobic ammonia oxidation granular sludge in sewage treatment reactor

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an anaerobic ammonia oxidation granular sludge loss prevention device in a sewage treatment reactor, the anaerobic ammonia oxidation granular sludge loss prevention device comprises a reactor body and a three-phase separator, a granular sludge interception device is arranged between the reactor body and the three-phase separator, and the granular sludge interception device comprises a middle cylinder; a center block is fixedly arranged at the center of the middle barrel, sealing bearings are evenly arranged on the circumferential face of the middle barrel, positioning holes aligned with the sealing bearings in the radial direction are formed in the outer circumferential face of the center block, a rotating shaft is rotationally arranged between each sealing bearing and the corresponding positioning hole, and a fan-shaped hole plate is arranged on each rotating shaft. The fan-shaped pore plates are arranged in a mirror symmetry manner by taking the rotating shaft as a center line; the device for preventing the loss of the anaerobic ammonia oxidation granular sludge in the sewage treatment reactor disclosed by the invention can effectively avoid the loss of the granular sludge in the anaerobic ammonia oxidation wastewater treatment process, and ensures the efficient and stable operation of the reactor.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and specifically discloses a device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor. Background Technology

[0002] Anaerobic ammonia oxidation (AAO), as a novel biological nitrogen removal process, is widely used in the treatment of high-ammonia-nitrogen wastewater, particularly low-carbon-to-nitrogen-ratio wastewater, as it conserves carbon sources and achieves highly efficient nitrogen removal. However, during operation, existing AAO reactors experience a problem: as the nitrogen volumetric loading increases, nitrogen production gradually increases. This nitrogen gas can become trapped inside or adhere to the sludge surface, reducing sludge density and causing sludge particles to float. These floating sludge particles are discharged with the wastewater from the effluent outlet, not only reducing the effective biomass within the reactor but also, in severe cases, clogging pipes and preventing the reactor from operating normally.

[0003] Utility model patent application number 2021207473232 discloses an anaerobic ammonia oxidation reactor for solving sludge floating, including a reactor body with an inlet distributor at the bottom and a circulation port at the top. A circulation pipe is provided between the inlet mixing pipe and the circulation port. A sludge selector is also provided near the top of the reactor body, including an upper backwash pipe, a lower return pipe, a bottom distributor, and a top distributor. The backwash pipe and the return pipe are both connected to the reactor body, and their other ends are connected to each other. An ascending pipe is also provided between them. A backwash pump is provided between the backwash pipe and the return pipe. A local internal circulation pump is provided on the ascending pipe. The top distributor is connected to the backwash pipe, and the bottom distributor is connected to the return pipe. A sludge-blocking screen is located between the top distributor and the bottom distributor. The anaerobic ammonia oxidation reactor disclosed in this utility model uses a three-phase separator at the top and a sludge-blocking screen below the separator. During wastewater treatment, the sludge-blocking screen traps large-diameter biological sludge particles, while smaller-diameter sludge particles pass through and settle within it, thus preventing the loss of anaerobic ammonia oxidation granular sludge to some extent. However, as the reaction continues, the trapped large-diameter sludge particles not only clog the lower surface of the sludge-blocking screen and cannot settle, but the granular sludge settled in the three-phase separator also grows larger and cannot pass through the sludge-blocking screen to the bottom of the reactor. Consequently, it still flows out of the reactor with the wastewater, causing pipe blockage and hindering long-term stable operation of the reactor. Therefore, this application proposes a device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor that can effectively solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor, so as to solve the technical problems mentioned in the background art of existing anaerobic ammonia oxidation reactors for solving sludge floating.

[0005] This invention is achieved through the following technical solution:

[0006] A device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor includes a reactor body and a three-phase separator. A granular sludge interception device is provided between the reactor body and the three-phase separator. The granular sludge interception device includes an intermediate cylinder connected to the top of the reactor body and the bottom of the three-phase separator. A central block is fixedly provided at the center of the intermediate cylinder. A plurality of sealed bearings are evenly provided on the circumference of the intermediate cylinder. A positioning hole is provided on the outer circumference of the central block, which is radially aligned with each sealed bearing. A rotating shaft is rotatably provided between each group of radially aligned sealed bearings and positioning holes, and the outer end of the rotating shaft extends out of the sealed bearing. A fan-shaped perforated plate is provided on each rotating shaft, and the fan-shaped perforated plates are mirror-symmetrically arranged with the rotating shaft as the center line. The side ends of two adjacent fan-shaped perforated plates overlap and seal each other in a horizontal state.

[0007] An annular track is fixed on the outer circular surface of the intermediate cylinder. A rotating ring is rotatably mounted on the annular track. A drive assembly is provided on the intermediate cylinder to realize the rotation of the rotating ring at a fixed angle. A lever corresponding to each rotating shaft is evenly arranged on the rotating ring. A swing bar is connected to the end of the rotating shaft that extends out of the sealed bearing. A strip-shaped opening is provided on the swing bar for the lever to pass through.

[0008] As a further feature of the above scheme, the rotating shaft is hollow, with the inner end sealed and the outer end open. The lower end of the rotating shaft has a protrusion along the axial direction, and the protrusion has a strip-shaped cavity inside that communicates with the hollow inner cavity of the rotating shaft. All the protrusions have a row of downwardly inclined water outlet holes on their sides in the same rotation direction.

[0009] As a further provision of the above scheme, an annular pipe with the same horizontal plane as the rotating shaft is provided on the periphery of the intermediate cylinder. The annular pipe is provided with a connecting pipe that is radially aligned with each rotating shaft, and the connecting pipe is sealed and rotatably connected to the outer end of the rotating shaft. One end of the annular pipe is connected to a conveying pipe, and the end of the conveying pipe is connected to a circulation pump. The water inlet of the circulation pump is connected to the lower end of the reactor body through a pipe.

[0010] As a further provision of the above scheme, the drive assembly includes a reducer fixed on the outer cylindrical surface of the intermediate cylinder, the input end of the reducer is connected to a drive motor, the lower end of the drive motor is connected to a drive gear, and the rotating ring is provided with an arc-shaped rack that meshes with the drive gear.

[0011] As a further feature of the above scheme, the central block is cylindrical in shape, and a central column is connected to the upper surface of the central block. Several radial connecting rods that are fixedly connected to the lower inner wall of the three-phase separator are evenly arranged at the upper end of the central column.

[0012] As a further feature of the above scheme, a temperature regulating jacket is provided on the outer surface of the reactor body, and a temperature sensor, a pH sensor and an oxygen concentration sensor are provided inside.

[0013] As a further provision of the above scheme, a water inlet distributor is provided at the bottom of the reactor body, and an inlet pipe extending out of the reactor body is connected to the end of the water inlet distributor. An inlet pump is connected to the outer end of the inlet pipe.

[0014] As a further provision of the above scheme, the three-phase separator includes a cover that is sealed to the top of the intermediate cylinder. The lower end of the cover is shaped like a frustum, wider at the top and narrower at the bottom. Inside the cover, a frustum-shaped flow guide is concentrically arranged, narrower at the top and wider at the bottom. An exhaust pipe extending out of the cover is connected to the top of the frustum-shaped flow guide. The lower end of the frustum-shaped flow guide is connected to an inclined ring plate parallel to the inclined surface at the lower end of the cover. An overflow port is provided on the upper side of the cover.

[0015] As a further feature of the above solution, a trap is provided on the outer surface of the cover located at the overflow port, a filter screen is inclinedly arranged in the trap, and a drain pipe is connected to the lower end of the outer surface of the trap.

[0016] As a further provision of the above scheme, a sludge collection hopper is provided at the lower end of the interception box on the side away from the drain pipe. The lower end of the sludge collection hopper is connected to a guide pipe, and a gate valve is provided on the guide pipe. The lower end of the guide pipe is connected to a jet pipe that is inclined downward and inserted into the lower end of the cover. The top of the jet pipe is connected to a pumping pipe. The lower end of the pumping pipe is connected to the water inlet pipe and the water inlet pump by a tee. Control valves are provided at the connection points of the tee with the pumping pipe and the water inlet pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The anaerobic ammonia oxidation granular sludge prevention device disclosed in this invention, during operation, not only intercepts large-diameter granular sludge through the granular sludge interception device, allowing small-diameter granular sludge to enter the three-phase separator for growth and sedimentation, but also actively opens the granular sludge interception device after a certain amount of granular sludge has settled in the three-phase separator. This allows the granular sludge settled in the three-phase separator to flow downwards and act on the large-diameter granular sludge that has not been screened, causing the large-diameter granular sludge to be collided, washed, and decomposed. Then, it flows downwards together into the lower part of the reactor, effectively preventing the loss of granular sludge during anaerobic ammonia oxidation wastewater treatment and ensuring the efficient and stable operation of the reactor.

[0019] 2. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in the wastewater treatment reactor disclosed in this invention further utilizes structural designs such as annular pipes, circulating pumps, raised strips, and outlet holes. When the fan-shaped perforated plate traps large-diameter granular sludge particles on its lower surface, the circulating pump can be activated to continuously pressurize and flush water into the annular pipe. This allows wastewater to be discharged from the outlet holes, continuously flushing away the large-diameter granular sludge particles that have not passed through the fan-shaped perforated plate, rapidly breaking them down into smaller particles. Furthermore, the multiple directions of wastewater flushing create a downward swirling flow, allowing the disintegrated sludge to flow downwards to the lower middle part of the reactor body. Additionally, when the fan-shaped perforated plate rotates and opens, causing the upper settling granular sludge particles to sink, the swirling effect also accelerates the rapid settling of the upper settling granular sludge, preventing large granular sludge particles from floating.

[0020] 3. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in the wastewater treatment reactor disclosed in this invention further includes components such as a retention box, filter screen, sludge collection hopper, and jet pipe in the three-phase separator. This device can filter the granular sludge that has not settled from the three-phase separator. Then, when the granular sludge in the retention box reaches a certain amount, a chemical agent or wastewater is pumped into the jet pipe to accelerate the liquid flow. This allows the granular sludge in the sludge collection hopper to be discharged from the bottom into the casing of the three-phase separator for re-settling, further preventing the loss of granular sludge and ensuring that the entire reactor can operate efficiently and stably without the problem of pipe blockage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0023] Figure 2 This is a schematic diagram of the second-angle three-dimensional structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal planar structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional internal planar structure of the three-phase separator, interception box, etc. in this invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the granular sludge interception device in the first state of the present invention;

[0027] Figure 6 This is a schematic diagram of the three-dimensional assembly structure of the granular sludge interception device in this invention;

[0028] Figure 7 This is a three-dimensional structural diagram of the second state of the granular sludge interception device in this invention;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the rotating shaft, the sector-shaped perforated plate, the protrusions, etc. in this invention;

[0030] Figure 9 For the present invention Figure 2 Enlarged structural diagram at point A;

[0031] Figure 10 For the present invention Figure 3 A magnified structural diagram at point B in the middle.

[0032] in:

[0033] 100-Reactor body, 101-Water inlet distributor, 102-Water inlet pipe, 103-Water inlet pump;

[0034] 200-Three-phase separator, 201-Casing, 202-Frustoconical guide shroud, 203-Exhaust pipe, 204-Inclined ring plate, 205-Interception box, 206-Filter screen, 207-Drain pipe, 208-Sludge hopper, 209-Gate valve, 210-Jet pipe, 211-Pump pipe, 212-Tee, 213-Control valve;

[0035] 300-Granular sludge interception device; 301-Intermediate cylinder; 302-Central block; 3021-Central column; 3022-Radial connecting rod; 303-Sealed bearing; 304-Rotating shaft; 305-Sector-shaped orifice plate; 306-Annular track; 307-Rotating ring; 308-Actuating rod; 309-Swing bar; 310-Strip-shaped opening; 311-Protruding bar; 3111-Outlet hole; 312-Annular pipe; 313-Connecting pipe; 314-Conveying pipe; 315-Reducer; 316-Drive motor; 317-Drive gear; 318-Arc-shaped rack; 319-Circulating pump. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-10 This application will be described in detail with reference to the embodiments.

[0038] Example 1

[0039] Example 1 discloses a device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor, as shown in the attached figure. Figure 1 and attached Figure 2 The main components of the device include a reactor body 100 and a three-phase separator 200, and a granular sludge interception device 300 is provided between the reactor body 100 and the three-phase separator 200.

[0040] Reference Appendix Figure 3 and attached Figure 4 A water inlet distributor 101 is installed at the bottom of the reactor body 100. An inlet pipe 102 extending out of the reactor body 100 is connected to the end of the water inlet distributor 101, and an inlet pump 103 is connected to the outer end of the inlet pipe 102. The inlet pump 103 is connected to a dosing tank or a wastewater pretreatment device to input the relevant chemicals and wastewater. Additionally, a temperature regulating jacket is installed on the outer surface of the reactor body 100, and a temperature sensor, a pH sensor, and an oxygen concentration sensor are installed inside the jacket. These features allow for precise control of temperature, pH, and oxygen content inside the reactor body 100 during the anaerobic ammonia oxidation wastewater treatment process, enabling rapid start-up and propagation treatment of the anaerobic ammonia oxidation wastewater.

[0041] The three-phase separator 200 includes a housing 201 sealed to the top of an intermediate cylinder 301, with the lower end of the housing 201 shaped like a frustum, wider at the top and narrower at the bottom. Inside the housing 201, a frustum-shaped guide shroud 202, also narrower at the top and wider at the bottom, is concentrically arranged. An exhaust pipe 203 extending out of the housing 201 is connected to the top of the frustum-shaped guide shroud 202. A sloping annular plate 204, parallel to the lower slope of the housing 201, is connected to the lower end of the frustum-shaped guide shroud 202, creating an annular gap between the sloping annular plate 204 and the slope of the housing 201 for the settling of sediment particles. Finally, an overflow port is provided on the upper side of the housing 201 for the automatic discharge of treated wastewater.

[0042] Reference Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 and attached Figure 8 The granular sludge interception device 300 includes an intermediate cylinder 301 that is sealed to the top of the reactor body 100 and the bottom of the three-phase separator 200, preventing internal sewage from leaking out from the connection point. A central block 302 is fixedly installed at the center of the intermediate cylinder 301. In the specific design, the central block 302 is set as a cylinder, and a central column 3021 is connected to its upper surface. Then, a number of radial connecting rods 3022 are evenly arranged at the upper end of the central column 3021, and the number of radial connecting rods 3022 are fixedly connected to the lower inner wall of the three-phase separator 200.

[0043] Reference Appendix Figure 10 A plurality of sealed bearings 303 are evenly arranged on the circumferential surface of the intermediate cylinder 301. Positioning holes, radially aligned with each sealed bearing 303, are provided on the outer circumferential surface of the central block 302. A rotating shaft 304 is rotatably mounted between each set of radially aligned sealed bearings 303 and the positioning holes, with the outer end of the rotating shaft 304 extending beyond the sealed bearing 303. A sector-shaped perforated plate 305 is provided on each rotating shaft 304, and the sector-shaped perforated plates 305 are arranged symmetrically with respect to the rotating shaft 304 as the center line. The diameter of the permeable holes on the sector-shaped perforated plates 305 is set between 2.0-2.5 mm, allowing for the interception and filtration of granular sludge according to its size. Furthermore, to prevent granular sludge from leaking out from the joint between the side ends of two adjacent sector-shaped perforated plates 305, the side ends of two adjacent sector-shaped perforated plates 305 are overlapped and sealed together in a horizontal state.

[0044] Reference Appendix Figure 9An annular track 306 is fixed on the outer circular surface of the intermediate cylinder 301, and a rotating ring 307 is rotatably mounted on the annular track 306. A drive assembly is provided on the intermediate cylinder 301 to achieve a fixed-angle rotation of the rotating ring 307. The specific drive assembly includes a reducer 315 fixed on the outer circular surface of the intermediate cylinder 301, a drive motor 316 connected to the input end of the reducer 315, a drive gear 317 connected to the lower end of the drive motor 316, and an arc-shaped rack 318 meshing with the drive gear 317 on the rotating ring 307. Through the power input of the drive motor 316 and the meshing transmission between the gear and the rack, the rotating ring 307 can achieve a fixed-angle rotation around the intermediate cylinder 301. Finally, a lever 308 corresponding to each rotating shaft 304 is evenly arranged on the rotating ring 307, and a swing bar 309 is connected to the end of the rotating shaft 304 that extends out of the sealed bearing 303, and a strip-shaped opening 310 for passing through the lever 308 is provided on the swing bar 309.

[0045] In the wastewater treatment reactor disclosed in Embodiment 1, during the operation of the device for preventing the loss of anaerobic ammonia oxidation granular sludge in the reactor, granular sludge with a larger particle size and more nitrogen trapped inside will flow upward with the wastewater. At this time, the granular sludge interception device 300 is in a sealed state (i.e., all the sector-shaped perforated plates 305 are rotated to be parallel, see attached). Figure 5 (As shown in the state), at this time, the large-diameter granular sludge will be trapped below by the fan-shaped perforated plate 305 and cannot flow upward. Moreover, the bacterial flocs of this type of granular sludge are generally loose. During the subsequent upward flow of water, most of them will disintegrate into sludge with smaller particle size. After falling back to the middle of the reactor, they will grow into granular sludge again under the action of hydraulic impact.

[0046] A small number of small-diameter granular sludge particles enter the three-phase separator 200 through the permeable holes on the orifice plate 305, where they undergo sedimentation. The generated nitrogen gas is promptly discharged through the exhaust pipe 203. At this point, the larger, settled sludge particles fall onto the upper surface of the orifice plate 305. The accumulation of sludge particles in the upper and lower sections affects the wastewater flow. The drive assembly is then activated, causing the rotating body 307 to rotate at a certain angle. During this rotation, the actuating rod 308 acts on the slot 310 of the swing bar 309, causing all the rotating shafts 304 to rotate synchronously. This causes all the orifice plates 305 to rotate around the rotating shafts 304, opening the intermediate cylinder 301. The granular sludge settling at the top then flows downwards, carrying the granular sludge below with it. The process continues until all the granular sludge above the orifice plates 305 has settled, at which point the cylinder returns to its original position.

[0047] Example 2

[0048] Example 2 discloses a device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor, which is an improved design based on the technical solution in Example 1. The similarities between Example 2 and Example 1 will not be described again.

[0049] Reference Appendix Figure 5 Appendix Figure 6 Appendix Figure 8 Appendix Figure 9 and attached Figure 10 The rotating shaft 304 is hollow, with its inner end sealed and its outer end open. A protrusion 311 is provided at the lower end of the rotating shaft 304 along the axial direction, and the protrusion 311 has a strip-shaped cavity inside that communicates with the hollow inner cavity of the rotating shaft 304. Then, a row of downwardly inclined water outlet holes 3111 are provided on the side of all the protrusions 311 in the same direction of rotation.

[0050] Meanwhile, an annular pipe 312, which is on the same horizontal plane as the rotating shaft 304, is provided around the intermediate cylinder 301. The annular pipe 312 is provided with a connecting pipe 313 that is radially aligned with each rotating shaft 304, and the connecting pipe 313 is rotatably and sealingly connected to the outer end of the rotating shaft 304. A conveying pipe 314 is connected to one end of the annular pipe 312, and a circulation pump 319 is connected to the end of the conveying pipe 314. The inlet of the circulation pump 319 is connected to the lower end of the reactor body 100 via a pipe.

[0051] In this embodiment 2, through the above-described structural design, when the large-diameter sludge particles floating on the lower surface of the perforated plate 305 are trapped, the circulating pump 319 is activated to continuously pressurize and flush water into the annular pipe 312. The pumped wastewater is then discharged from the outlet hole 3111 on the side of the protrusion 311. The discharged wastewater washes away the large-diameter sludge particles that have not passed through the perforated plate 305, causing them to quickly break down into smaller sludge particles. Furthermore, the flushing action of wastewater from multiple directions creates a downward swirling flow, allowing the broken-down sludge to flow downwards with the swirling flow to the lower middle part of the reactor body 100. In addition, when the perforated plate 305 rotates and opens, causing the upper settling sludge particles to sink, its swirling effect also accelerates the rapid sinking of the upper settling sludge particles, preventing large sludge particles from floating.

[0052] Example 3

[0053] Example 3 discloses a device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor, which is an improved design based on the technical solution in Example 1 or Example 2. The similarities between the device and Example 1 or Example 2 will not be described again.

[0054] Reference Appendix Figure 1 and attached Figure 4In this embodiment 3, a trapping box 205 is also provided on the outer surface of the cover 201 located at the overflow port. A filter screen 206 is inclinedly arranged in the trapping box 205. The mesh size of the filter screen 206 is set between 0.5-1.0mm, so that it can trap sludge particles with smaller particle sizes. A drain pipe 207 is also connected to the lower end of the outer surface of the trapping box 205.

[0055] A sludge hopper 208 is installed at the lower end of the interception box 205 on the side away from the drain pipe 207. A guide pipe is connected to the lower end of the sludge hopper 208, and a gate valve 209 is installed on the guide pipe. A jet pipe 210 is connected to the lower end of the guide pipe, which is inclined downward and inserted into the lower end of the cover 201. The upper diameter of the jet pipe 210 is larger than the lower diameter, forming a structure similar to a Venturi tube to accelerate the internal liquid flow rate. A pump pipe 211 is connected to the top of the jet pipe 210. A tee 212 is connected between the lower end of the pump pipe 211 and the water inlet pipe 102 and the water pump 103. A control valve 213 is installed at the connection between the tee 212 and the pump pipe 211 and the water inlet pipe 102.

[0056] The interception box 205 and filter screen 206 disclosed in this embodiment 3 can filter the granular sludge that has not settled from the three-phase separator. Then, when the granular sludge in the interception box 205 reaches a certain amount, the control valve 213 connected to the pump liquid pipe 211 is opened to change the direction of entry of external agents or sewage. At this time, the pumped water will accelerate its flow inside the jet pipe 210 under the action of the venturi tube structure, and then discharge the granular sludge in the sludge collection hopper 208 from the bottom into the cover 201 of the three-phase separator for re-settling, further preventing the loss of granular sludge.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor, comprising a reactor body (100) and a three-phase separator (200), characterized in that, A granular sludge retention device (300) is provided between the reactor body (100) and the three-phase separator (200). The granular sludge retention device (300) includes an intermediate cylinder (301) connected to the top of the reactor body (100) and the bottom of the three-phase separator (200). A central block (302) is fixedly provided at the center of the intermediate cylinder (301). A plurality of sealed bearings (303) are evenly provided on the circumferential surface of the intermediate cylinder (301). The outer circumferential surface of the central block (302) is provided with... A positioning hole is provided that is radially aligned with each sealing bearing (303). A rotating shaft (304) is rotatably provided between each set of radially aligned sealing bearings (303) and the positioning hole. The outer end of the rotating shaft (304) extends out of the sealing bearing (303). Each rotating shaft (304) is provided with a fan-shaped perforated plate (305). The fan-shaped perforated plates (305) are mirror-symmetrically arranged with the rotating shaft (304) as the center line. The side ends of two adjacent fan-shaped perforated plates (305) overlap and seal each other in a horizontal state. An annular track (306) is fixed on the outer circular surface of the intermediate cylinder (301). A rotating ring (307) is rotatably mounted on the annular track (306). A drive assembly is provided on the intermediate cylinder (301) to realize the rotation of the rotating ring (307) at a fixed angle. A lever (308) corresponding to each rotating shaft (304) is evenly arranged on the rotating ring (307). A swing bar (309) is connected to the end of the rotating shaft (304) that extends out of the sealed bearing (303). A strip-shaped opening (310) is provided on the swing bar (309) for the lever (308) to pass through.

2. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 1, characterized in that, The rotating shaft (304) is hollow, with its inner end sealed and its outer end open. The lower end of the rotating shaft (304) has a protrusion (311) along the axial direction, and the protrusion (311) has a strip-shaped cavity inside that communicates with the hollow inner cavity of the rotating shaft (304). All the protrusions (311) have a row of downwardly inclined water outlet holes (3111) on their sides in the same rotation direction.

3. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 2, characterized in that, The outer periphery of the intermediate cylinder (301) is provided with an annular pipe (312) that is on the same horizontal plane as the rotating shaft (304). The annular pipe (312) is provided with a connecting pipe (313) that is radially aligned with each rotating shaft (304), and the connecting pipe (313) is sealed and rotatably connected to the outer end of the rotating shaft (304). One end of the annular pipe (312) is connected to a conveying pipe (314), and the end of the conveying pipe (314) is connected to a circulating pump (319). The water inlet of the circulating pump (319) is connected to the lower end of the reactor body (100) through a pipe.

4. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 1, characterized in that, The drive assembly includes a reducer (315) fixed on the outer circular surface of the intermediate cylinder (301). The input end of the reducer (315) is connected to a drive motor (316), and the lower end of the drive motor (316) is connected to a drive gear (317). The rotating ring (307) is provided with an arc-shaped rack (318) that meshes with the drive gear (317).

5. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 1, characterized in that, The central block (302) is cylindrical in shape, and a central column (3021) is connected to the upper surface of the central block (302). Several radial connecting rods (3022) that are fixedly connected to the lower inner wall of the three-phase separator (200) are evenly arranged at the upper end of the central column (3021).

6. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 1, characterized in that, The outer surface of the reactor body (100) is provided with a temperature regulating jacket, and the interior is provided with a temperature sensor, a pH sensor and an oxygen concentration sensor.

7. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 1, characterized in that, The bottom of the reactor body (100) is provided with a water inlet distributor (101), and the end of the water inlet distributor (101) is connected to a water inlet pipe (102) extending out of the reactor body (100). The outer end of the water inlet pipe (102) is connected to a water inlet pump (103).

8. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 7, characterized in that, The three-phase separator (200) includes a cover (201) that is sealed to the top of the intermediate cylinder (301). The lower end of the cover (201) is shaped like a frustum with a wider top and a narrower bottom. Inside the cover (201), there is a concentric frustum-shaped flow guide (202) that is narrower at the top and wider at the bottom. The top of the frustum-shaped flow guide (202) is connected to an exhaust pipe (203) that extends out of the cover (201). The lower end of the frustum-shaped flow guide (202) is connected to an inclined ring plate (204) that is parallel to the inclined surface at the lower end of the cover (201). An overflow port is provided on the upper side of the cover (201).

9. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 8, characterized in that, An interception box (205) is provided on the outer surface of the cover (201) located at the overflow port. A filter screen (206) is inclinedly arranged in the interception box (205). A drain pipe (207) is connected to the lower end of the outer surface of the interception box (205).

10. The device for preventing the loss of anaerobic ammonia oxidation granular sludge in a wastewater treatment reactor according to claim 9, characterized in that, A sludge hopper (208) is provided at the lower end of the interception box (205) on the side away from the drain pipe (207). A guide pipe is connected to the lower end of the sludge hopper (208). A gate valve (209) is provided on the guide pipe. A jet pipe (210) is connected to the lower end of the guide pipe and is inclined downward and inserted into the lower end of the cover (201). A pump liquid pipe (211) is connected to the top of the jet pipe (210). A tee (212) is connected between the lower end of the pump liquid pipe (211) and the water inlet pipe (102) and the water inlet pump (103). A control valve (213) is provided at the connection between the tee (212) and the pump liquid pipe (211) and the water inlet pipe (102).

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