Water treatment device

Abstract

The invention discloses a water treatment device, and relates to the technical field of sewage treatment, the water treatment device comprises a pre-anoxic reaction tank, a nitration reaction tank, a sedimentation tank and an annular reaction tank, the annular reaction tank is arranged around the periphery of the sedimentation tank, the nitration reaction tank and the pre-anoxic reaction tank, the pre-anoxic reaction tank is arranged at the end of the nitration reaction tank, and the annular reaction tank is arranged at the end of the nitration reaction tank. The sedimentation tank is arranged on one side of the nitration reaction tank, the pre-anoxic reaction tank is communicated with an inner cavity of the annular reaction tank, a plurality of aeration units I are arranged in the annular reaction tank and are arranged along the annular direction of the annular reaction tank, the nitration reaction tank is communicated with the annular reaction tank, and the annular reaction tank is communicated with the sedimentation tank. The nitration reaction tanks are communicated, a nitration liquid backflow channel is arranged between the sedimentation tank and the annular reaction tank, and the sedimentation tank is communicated with the pre-anoxic reaction tank. The sewage treatment effect can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a water treatment device. Background Art

[0002] With the development of urbanization, the number of urban population continues to increase, and the amount of sewage treated by urban sewage treatment plants continues to increase, causing the structures and equipment of sewage treatment plants to be often at full load or overload. In order to solve the current problems of sewage treatment plants, it is often necessary to increase the capacity of traditional sewage treatment plants or expand them or to build new traditional sewage treatment plants.

[0003] Due to reasons such as land planning, the land required for the expansion or new construction of traditional sewage treatment plants is often large, and the construction cost is high and the construction period is relatively long. Therefore, the sewage treatment equipment currently used mostly adopts the AAO activated sludge method, that is, by organically combining the three different environmental conditions of anaerobic, anoxic and aerobic, the sewage is first discharged into the anaerobic zone, and under anoxic conditions, the large molecular organic matter is decomposed into small molecular organic matter and phosphorus is released at the same time; then the sewage is discharged into the anoxic zone, and the denitrifying bacteria are used to reduce nitrate to nitrogen gas to achieve denitrification; finally, the sewage is discharged into the aerobic zone, the ammonia nitrogen is converted into nitrate, and the organic matter and phosphorus are further removed through the metabolism of microorganisms, so as to achieve the simultaneous removal of organic matter, nitrogen and phosphorus.

[0004] However, the existing sewage treatment equipment has relatively simple functional attributes and cannot flexibly adjust the three different environmental conditions according to actual conditions such as sewage inflow volume and water quality fluctuations. The sewage treatment effect is poor. Therefore, this application provides a new solution. Summary of the invention

[0005] In order to improve the effect of sewage treatment, the present application provides a water treatment device.

[0006] This application provides a technical solution that adopts the following:

[0007] A water treatment device, comprising a pre-anoxic reaction tank, a nitrification reaction tank, a sedimentation tank and an annular reaction tank for circulating sewage, wherein the annular reaction tank is arranged around the sedimentation tank, the nitrification reaction tank and the periphery of the pre-anoxic reaction tank, the pre-anoxic reaction tank is arranged at the end of the nitrification reaction tank, the sedimentation tank is arranged on one side of the nitrification reaction tank, the pre-anoxic reaction tank is connected with the inner cavity of the annular reaction tank through a pipeline, a plurality of aeration units 1 for supplying oxygen to the annular reaction tank are arranged in the annular reaction tank, the plurality of aeration units 1 are arranged along the annular direction of the annular reaction tank, and an anaerobic zone, an anoxic zone and an aerobic zone are formed inside the annular reaction tank by adjusting the aeration time of the plurality of aeration units 1, the nitrification reaction tank is connected with the annular reaction tank through a pipeline, the nitrification reaction tank is connected with the sedimentation tank through a pipeline, a nitrification liquid reflux channel is arranged between the sedimentation tank and the annular reaction tank, the sedimentation tank is connected with the pre-anoxic reaction tank, and is used to discharge the sludge precipitated in the sedimentation tank into the pre-anoxic reaction tank;

[0008] The annular reaction pool is provided with a plurality of partition mechanisms for separating the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction pool, the partition mechanism comprises a carrying box, two movable components and a lifting component, the interior of the carrying box is hollow and is opened toward the annular reaction pool, a fixed plate is fixedly connected to the inner wall of the carrying box, and the fixed plate divides the inner cavity of the carrying box into two parts, the two movable components are respectively arranged at the two ends of the inner cavity of the carrying box, and the sliding parts of the movable components abut against the side walls of the annular reaction pool, the lifting component is arranged at the upper end of the carrying box, and the lifting part of the lifting component is penetrated through the carrying box and extends into the annular reaction pool, a flexible membrane is connected to the opening of the carrying box, and the flexible membrane is connected to the lifting part of the lifting component.

[0009] Optionally, the pre-anoxic reaction tank is connected to a water inlet pipe, and a first flow producer and a second flow producer are provided in the annular reaction tank for promoting the flow of sewage, and the first flow producer and the second flow producer are symmetrically arranged along the annular direction of the annular reaction tank, and the flow directions of the first flow producer and the second flow producer are both clockwise or counterclockwise.

[0010] Optionally, a solid-liquid-gas separation unit for solid-liquid-gas separation of sewage is provided in the sedimentation tank, an aeration unit 2 is provided in the solid-liquid-gas separation unit, and the aeration unit 2 is arranged at the bottom of the solid-liquid-gas separation unit, a sludge discharge port for sludge discharge is provided at the bottom of the solid-liquid-gas separation unit, and an outlet weir for overflow water is provided at the upper end of the solid-liquid-gas separation unit.

[0011] Optionally, a sludge return channel is provided at the end of the sedimentation tank, and the sedimentation tank is connected to the pre-anoxic reaction tank through the sludge return channel, and one end of the sludge return channel is connected to the sludge discharge port of the solid-liquid-gas separation unit.

[0012] Optionally, the exhaust port of the solid-liquid-gas separation unit is connected to an air collecting pipe, and an end of the air collecting pipe is connected to a position where the sludge return channel is connected to the sludge discharge port.

[0013] Optionally, two pre-anoxic reaction tanks are provided, and the two pre-anoxic reaction tanks are respectively provided at two ends of the nitrification reaction tank, and an aeration unit three is provided in the nitrification reaction tank.

[0014] Optionally, the moving component includes a telescopic spring 1, a telescopic spring 2, a roller 1, a roller 2, a supporting block, a connecting block and an adjusting block, one end of the telescopic spring 1 is fixedly connected to one side of a fixed plate, and the other end of the telescopic spring 1 is fixedly connected to the supporting block, a groove is provided on the side of the supporting block facing away from the telescopic spring 1, the roller 1 is rotatably connected in the groove, and the side wall of the roller 1 abuts against the inner wall of the annular reaction pool, the connecting block is fixedly connected to the inner wall of one end of the carrying box, and the connecting block extends toward the telescopic spring 1, the adjusting block is provided with a sliding groove toward one end of the telescopic spring 1, one end of the adjusting block is slidably connected in the sliding groove, and the other end of the adjusting block is rotatably connected to the roller 2, one end of the telescopic spring 2 is fixedly connected to the connecting block, an end of the adjusting block facing away from one end of the connecting block is fixedly connected to the extension block, the other end of the telescopic spring 2 abuts against the extension block, and the telescopic spring 2 is sleeved on the adjusting block, and the roller 2 abuts against the outer wall of the annular reaction pool.

[0015] Optionally, the lifting assembly includes a driving motor, a synchronous belt, a threaded rod, a limit rod and a slide, the threaded rod rotatably penetrates the carrying box, one end of the threaded rod extends into the annular reaction pool, and the other end of the threaded rod extends out of the carrying box and extends vertically upward, one end of the slide is threadedly sleeved on the threaded rod, the driving motor is fixedly connected to the upper end of the carrying box, and the output shaft of the driving motor extends downward, the synchronous belt is wrapped around the upper end of the threaded rod and the output shaft of the driving motor, the limit rod is fixedly penetrated in the carrying box, and the limit rod extends into the annular reaction pool, the other end of the slide is slidably sleeved on the limit rod, one end of the flexible membrane is fixedly connected to the opening of the carrying box, and the other end of the flexible membrane is fixedly connected to the side wall of the slide.

[0016] In summary, the present application includes the following beneficial technical effects: according to the inflow volume and water quality of sewage, the multiple aeration units in the annular reaction tank are controlled to form anaerobic zones, anoxic zones and aerobic zones in the annular reaction tank to meet the treatment of sewage, and the three environments can be arranged by adjusting the aeration time and working frequency of the multiple aeration units. The annular reaction tank, the pre-anoxic reaction tank, the nitrification reaction tank and the sedimentation tank are connected in sequence to realize the circulation treatment of sewage and achieve the effect of improving sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present application;

[0018] Figure 2 It is a structural schematic diagram of a solid-liquid-gas separation unit according to Embodiment 1 of the present application;

[0019] Figure 3 It is a schematic diagram of the overall structure of the partition mechanism of the second embodiment of the present application;

[0020] Figure 4 It is a structural diagram of the mobile component of the second embodiment of the present application.

[0021] Explanation of the reference numerals: 1. pre-anoxic reaction tank; 11. water inlet pipe; 2. nitrification reaction tank; 3. sedimentation tank; 31. solid-liquid-gas separation unit; 32. aeration unit 2; 33. mud outlet; 34. water outlet weir; 35. gas collecting pipe; 4. annular reaction tank; 41. aeration unit 1; 42. first flowmaker; 43. second flowmaker; 5. nitrification liquid reflux channel; 6. sludge reflux channel; 7. partition mechanism; 71. carrying box; 711. fixed plate; 72. moving assembly; 721. telescopic spring 1; 722. telescopic spring 2; 723. roller 1; 724. roller 2; 725. support block; 726. connecting block; 727. adjusting block; 728. extension block; 73. lifting assembly; 731. driving motor; 732. synchronous belt; 733. threaded rod; 734. limit rod; 735. slide. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 This application is described in further detail.

[0023] The embodiment of the present application discloses a water treatment device.

[0024] Reference Figures 1 to 4 The water treatment device includes a pre-anoxic reaction tank 1, a nitrification reaction tank 2, a sedimentation tank 3 and an annular reaction tank 4. The annular reaction tank 4 is arranged around the sedimentation tank 3, the nitrification reaction tank 2 and the periphery of the pre-anoxic reaction tank 1, and is used for circulating sewage. The pre-anoxic reaction tank 1 is arranged at the end of the nitrification reaction tank 2, the sedimentation tank 3 is arranged on one side of the nitrification reaction tank 2, and the inner cavity of the pre-anoxic reaction tank 1 is connected to the annular reaction tank 4 through a sewage pipe.

[0025] A plurality of aeration units 41 for supplying oxygen to the inner cavity of the annular reaction pool 4 are arranged in the annular direction of the annular reaction pool 4. By controlling the aeration duration and aeration frequency of the plurality of aeration units 41, three environments, namely, an anaerobic zone, an anoxic zone and an aerobic zone, are formed inside the annular reaction pool 4 (the aeration unit 41 in this embodiment and the aeration unit 2 32 and the aeration unit 3 mentioned below are all jet aerators commonly used in sewage treatment equipment).

[0026] The nitrification reaction tank 2 is connected to the sedimentation tank 3 through a pipeline. A nitrification liquid reflux channel 5 for reflux of the nitrification liquid is provided between the sedimentation tank 3 and the annular reaction tank 4. The nitrification liquid in the sedimentation tank 3 is discharged into the annular reaction tank 4 through the nitrification liquid reflux channel 5 to facilitate the nitrification reaction in the annular reaction tank 4.

[0027] The sedimentation tank 3 is connected to the pre-anoxic reaction tank 1 and is used to discharge the sludge precipitated in the sedimentation tank 3 into the pre-anoxic reaction tank 1. The sludge is rich in microorganisms that are beneficial to sewage degradation, so as to improve the decomposition effect of the biodegradable organic matter in the sewage in the pre-anoxic reaction tank 1.

[0028] The specific steps of sewage treatment by this device are as follows:

[0029] The pre-anoxic reaction tank 1 is pre-filled with return sludge rich in microorganisms, and the sewage is injected into the pre-anoxic reaction tank 1. After anaerobic decomposition by microorganisms, part of the biodegradable organic matter in the sewage is decomposed, and denitrification is performed to reduce the content of nitrogen-containing compounds in the sewage;

[0030] The sewage flows from the pre-anoxic reaction tank 1 into the annular reaction tank 4, and continuously circulates through the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction tank 4, so that the pollutants are continuously degraded, and then the sewage enters the nitrification reaction tank 2 for further nitrification reaction;

[0031] Finally, the sewage enters the sedimentation tank 3 for sedimentation and separation, wherein the qualified sewage after circulating treatment is discharged to the outside of the device, a part of the sludge is used as nitrification liquid and discharged into the annular reaction tank 4 through the nitrification liquid reflux channel 5 to provide nitrate nitrogen for denitrifying bacteria to complete denitrification, and the other part of the sludge is discharged into the pre-anoxic reaction tank 1 as return sludge, thereby realizing the treatment of sewage.

[0032] Among them, when the sewage flows into the anaerobic zone, anoxic zone and aerobic zone of the annular reaction tank 4 and continuously circulates and degrades, the aeration duration and working frequency of different aeration units 41 can be controlled respectively according to the actual conditions such as the influent water volume and water quality fluctuations of the sewage, and the layout of the anaerobic zone, anoxic zone and aerobic zone in the annular reaction tank 4 can be flexibly controlled to improve the effect of sewage treatment.

[0033] Reference Figure 1 In order to promote the denitrification of microorganisms in the pre-anoxic reaction tank 1, a water inlet pipe 11 is connected above the pre-anoxic reaction tank 1, and water is introduced into the pre-anoxic reaction tank 1 through the water inlet pipe 11, which provides a necessary carbon source for the denitrification of microorganisms. At the same time, the organic matter in the influent water serves as an energy source for the growth of microorganisms, thereby ensuring the activity of the microorganisms in the pre-anoxic reaction tank 1 and improving the effect of sewage treatment in the pre-anoxic reaction tank 1.

[0034] In order to separate the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction tank 4 , a plurality of partition mechanisms 7 are arranged in the annular reaction tank 4 .

[0035] The partition mechanism 7 includes a carrying box 71, two moving components 72 and a lifting component 73. The carrying box 71 is arranged at the upper end of the annular reaction pool 4. The interior of the carrying box 71 is hollow and is opened toward the annular reaction pool 4. A fixing plate 711 is fixedly connected to the inner wall of the carrying box 71 by bolts. The fixing plate 711 separates the two ends of the carrying box 71. The two moving components 72 are located in the inner cavity of the carrying box 71 and are respectively arranged on both sides of the fixing plate 711. The sliding part of the moving component 72 abuts against the side wall of the annular reaction pool 4, so that the carrying box 71 is slidably connected to the annular reaction pool 4. The lifting component 73 is arranged at the upper end of the carrying box 71, and the lifting part of the lifting component 73 is penetrated through the carrying box 71 and extends into the annular reaction pool 4. The carrying box 71 is connected to a flexible membrane at its opening. One end of the flexible membrane is fixed to the lower surface of the carrying box 71, and the other end of the flexible membrane is connected to the lifting part of the lifting component 73 (the flexible membrane in this embodiment is a flexible ceramic membrane commonly used to separate various areas in sewage treatment).

[0036] In this embodiment, the aeration of each aeration unit 41 is adjusted according to the inflow water volume and water quality fluctuation of the sewage to control the anaerobic zone, anoxic zone and aerobic zone in the annular reaction tank 4. The carrying box 71 slides on the annular reaction tank 4 through the moving component 72, adjusts its position in the annular reaction tank 4, and pushes the flexible membrane to the bottom of the annular reaction tank 4 through the lifting component 73, so as to cooperate with different aeration units 41 for aeration, and separate the anaerobic zone, anoxic zone and aerobic zone in the annular reaction tank 4, improve the stability of oxygen content in different environments, and improve the effect of sewage treatment. It should be noted that when the sewage in the annular reaction tank 4 is circulated, the flexible membrane needs to be lifted by the lifting component 73 to enable the circulation of the sewage to operate normally.

[0037] The first flowmaker 42 and the second flowmaker 43 are provided in the annular reaction pool 4 to promote the continuous circulation of sewage in the anaerobic zone, the anoxic zone and the aerobic zone of the annular reaction pool 4, wherein the first flowmaker 42 and the second flowmaker 43 are symmetrically arranged on both sides of the annular reaction pool 4 along the annular direction of the annular reaction pool 4, and the first flowmaker 42 and the second flowmaker 43 are in a clockwise direction or in a counterclockwise direction (the first flowmaker 42 and the second flowmaker 43 in the present embodiment are both submersible flowmakers commonly used in sewage treatment). The first flowmaker 42 and the second flowmaker 43 are adjacently arranged along the annular direction of the annular reaction pool 4, and the flow directions of the first flowmaker 42 and the second flowmaker 43 deviate from each other.

[0038] Reference Figure 2 The sedimentation tank 3 is provided with a solid-liquid-gas separation unit 31 for separating solid, liquid and gas from sewage. The solid-liquid-gas separation unit 31 is an existing solid-liquid-gas separator in sewage treatment. An aeration unit 2 32 is provided in the solid-liquid-gas separation unit 31, and the aeration unit 2 32 is provided at the bottom of the solid-liquid-gas separation unit 31. A sludge discharge port 33 for sludge discharge is provided at the bottom of the solid-liquid-gas separation unit 31, and a water outlet weir 34 for overflow water is provided at the upper end of the solid-liquid-gas separation unit 31. An exhaust port for gas discharge is also provided on the side wall of the solid-liquid-gas separation unit 31.

[0039] Through the above arrangement, when sewage flows into the sedimentation tank 3 and is separated into solid, liquid and gas by the solid-liquid-gas separation unit 31, the aeration unit 2 32 increases the dissolved oxygen content in the water body by introducing air into the sewage, thereby promoting the degradation of organisms. The separated sludge is discharged from the solid-liquid-gas separation unit 31 through the sludge outlet 33, and the sewage that meets the standards after circulation overflows from the solid-liquid-gas separation unit 31 through the outlet weir 34, and the gas separated by the solid-liquid-gas separation unit 31 is discharged from the solid-liquid-gas separation unit 31 through the exhaust port, completing the solid, liquid and gas separation of the sewage.

[0040] Reference Figure 1 and Figure 2 In order to facilitate the sludge to return to the pre-anoxic reaction tank 1, a sludge return channel 6 is provided between the sedimentation tank 3 and the pre-anoxic reaction tank 1 to achieve communication, and one end of the sludge return channel 6 is connected to the sludge discharge port 33 of the solid-liquid-gas separation unit 31. When a part of the sludge flows out from the sludge discharge port 33 at the bottom of the solid-liquid-gas separation unit 31, it flows into the pre-anoxic reaction tank 1 through the sludge return channel 6 as return sludge, promoting the decomposition of organic matter in the sewage in the pre-anoxic reaction tank 1, and achieving the effect of cyclic decomposition and utilization.

[0041] In order to facilitate the sludge to flow from the sludge discharge port 33 through the sludge return channel 6 into the pre-anoxic reaction tank 1, the exhaust port of the solid-liquid-gas separation unit 31 is connected to the gas collecting pipe 35. The gas separated by the solid-liquid-gas separation unit 31 is used to push the sludge into the pre-anoxic reaction tank 1. The end of the gas collecting pipe 35 needs to extend from the junction of the sludge return channel 6 and the sludge discharge port 33 into the sludge return channel 6 to ensure that the gas in the gas collecting pipe 35 can promote the sludge to flow to the sludge return channel 6.

[0042] Through the above arrangement, when the sludge is discharged from the sludge discharge port 33 into the sludge return channel 6 , the gas in the gas collecting pipe 35 pushes the sludge through the sludge return channel 6 into the pre-anoxic reaction tank 1 .

[0043] Reference Figure 1 In order to improve the efficiency of the device for sewage treatment, two pre-anoxic reaction tanks 1 are provided, and the two pre-anoxic reaction tanks 1 are respectively provided at the two ends of the nitrification reaction tank 2 .

[0044] In one embodiment of the present application, in order to meet the metabolic needs of nitrifying bacteria in the nitrification reaction tank 2 and promote the oxidation process of ammonia nitrogen, an aeration unit 3 is installed in the nitrification reaction tank 2. When the sewage undergoes nitrification in the nitrification reaction tank 2, air or oxygen is transported to the nitrification reaction tank 2 through the aeration unit 3 to increase the dissolved oxygen content in the water, ensure that the nitrifying bacteria have enough oxygen to oxidize ammonia nitrogen, and maintain the activity of the nitrifying bacteria. It should be noted that in order to facilitate the sludge from the nitrification reaction tank 2 to enter the sedimentation tank 3 for mud and water separation, when the sewage undergoes nitrification in the nitrification reaction tank 2, the flow rate of the sewage in the nitrification reaction tank 2 should be slowed down to increase the mixing degree of the sewage.

[0045] The implementation principle of this embodiment is as follows: the sewage after anaerobic decomposition in the pre-anoxic reaction tank 1 is passed into the annular reaction tank 4, and the aeration unit 41 in the annular reaction tank 4 adjusts the aeration time and working frequency according to the water volume and water quality of the sewage, and divides the annular reaction tank 4 into an anaerobic zone, anoxic zone and aerobic zone. The sewage is continuously circulated and degraded through the annular reaction tank 4 to improve the effect of sewage treatment. The sewage degraded through the annular reaction tank 4 enters the nitrification reaction tank 2 through the sewage pipe, and the sewage after nitrification enters the solid-liquid-gas separation unit 31 in the sedimentation tank 3 through the sewage channel for solid, liquid and gas separation. A part of the sludge separated from the solid-liquid-gas separation unit 31 flows into the pre-anoxic reaction tank 1 through the sludge return channel 6, providing microorganisms that are beneficial to the degradation of organic matter for the sewage injected later. The gas discharged from the solid-liquid-gas separation unit 31 is collected by the gas collecting pipe 35 and discharged into the sludge return channel 6, which has the effect of promoting the sludge to flow into the pre-anoxic reaction tank 1, and improves the effect of sewage treatment.

[0046] Reference Figure 4The moving assembly 72 includes a telescopic spring 1 721, a telescopic spring 2 722, a roller 1 723, a roller 2 724, a support block 725, a connecting block 726 and an adjusting block 727. One end of the telescopic spring 1 721 is fixedly connected to the side wall of the fixed plate 711, the support block 725 is fixedly connected to the other end of the telescopic spring 1 721, and a groove is provided at one end of the support block 725 away from the telescopic spring 1 721, the roller 1 723 is rotatably connected in the groove, and both ends of the lower surface of the carrying box 71 are provided with embedded grooves, the side wall of the annular reaction pool 4 extends into the embedded groove, and the roller 1 723 abuts against the inner wall of the annular reaction pool 4.

[0047] The connecting block 726 is welded to the inner wall of one end of the carrying box 71, and the connecting block 726 is extended toward the telescopic spring 1 721. A sliding groove is opened at one end of the connecting block 726 toward the telescopic spring 1 721. One end of the adjusting block 727 is slidingly connected in the sliding groove, and the other end of the adjusting block 727 extends out of the sliding groove and is rotatably connected to the roller 2 724. An extension block 728 is welded on the end of the adjusting block 727 extending out of the sliding groove. The telescopic spring 2 722 is sleeved on the adjusting block 727, and the two ends of the telescopic spring 2 722 are respectively abutted against the connecting block 726 and the extension block 728, and the roller 2 724 is abutted against the outer wall of the annular reaction pool 4.

[0048] Through the above arrangement, roller 1 723 and roller 2 724 are respectively in contact with the inner wall and side wall of the annular reaction pool 4, so that the carrying box 71 can slide along the annular direction of the annular reaction pool 4 above the annular reaction pool 4. When the carrying box 71 slides in the annular curved section of the annular reaction pool 4, roller 1 723 and roller 2 724 are respectively extended and retracted by telescopic spring 1 721 and telescopic spring 2 722, so that roller 1 723 and roller 2 724 are always in contact with the side wall and inner wall of the annular reaction pool 4 to adapt to the sliding of the partition mechanism 7 in the annular reaction pool 4. It should be noted that rollers are rotatably connected to the inner wall of the carrying box 71, and the rollers are in contact with the upper surface of the annular reaction pool to facilitate the sliding of the carrying box 71.

[0049] Reference Figure 3 and Figure 4The lifting assembly 73 includes a driving motor 731, a synchronous belt 732, a threaded rod 733, a limiting rod 734 and a slide 735. The threaded rod 733 is rotatably arranged in the carrying box 71, and the threaded rod 733 is vertically arranged. The lower end of the threaded rod 733 extends into the annular reaction pool 4, and the upper end of the threaded rod 733 extends out of the carrying box 71. One end of the slide 735 is threadedly sleeved on the threaded rod 733, and the slide 735 is located below the carrying box 71. The upper surface of the carrying box 71 is fixed by bolts. There is a connecting frame, a driving motor 731 is mounted on the connecting frame and fixed by bolts, the output shaft of the driving motor 731 is extended downward and is connected to the synchronous belt 732 through a gear structure, and the synchronous belt 732 is wound around the upper end of the threaded rod 733, so that the output shaft of the driving motor 731 can drive the synchronous belt 732 to rotate, a limiting rod 734 is fixedly penetrated in the carrying box 71, and the lower end of the limiting rod 734 extends into the annular reaction pool 4, and the other end of the slide 735 is slidably sleeved on the limiting rod 734.

[0050] The opening of the carrying box 71 and the upper end of the slide 735 are respectively provided with a pressing plate, through which the flexible film is fixed between the carrying box 71 and the slide 735, and when the slide 735 slides toward the annular reaction pool 4, one end of the flexible film moves with the slide 735, so that the flexible film is unfolded, which has the effect of isolating the various environments in the annular reaction pool 4. It should be noted that, when the sewage is circulated, the flexible film needs to be retracted to ensure the sewage circulation effect, so the driving motor 731 in this embodiment can be a servo motor that can rotate forward and reverse, and the length of the flexible film needs to be greater than the lowest height of the slide 735 to ensure that the flexible film will not be damaged during the stretching process due to insufficient length.

[0051] Through the above arrangement, the output shaft of the driving motor 731 drives the synchronous belt 732 to rotate through the gear structure, drives the threaded rod 733 to rotate, and the slide 735 slides along the threaded rod 733 under the limit of the limit rod 734. When the slide 735 slides into the annular reaction tank 4, the flexible membrane gradually unfolds, which has the effect of isolating the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction tank 4. When each aeration unit 41 adjusts the aeration condition according to the sewage inflow and water quality, the output shaft of the driving motor 731 drives the slide 735 to slide toward the carrying box 71, and the flexible membrane achieves the effect of gathering and recycling, so that the carrying box 71 can adjust its position in the annular reaction tank 4 according to different environments.

[0052] In order to prevent the slide 735 from sliding excessively and sliding out from the lower end of the threaded rod 733, a limit plate is welded to the end of the lower end of the threaded rod 733, and the other end of the limit plate is welded and fixed to the end of the limit rod 734.

[0053] The implementation principle of this embodiment is as follows: when each aeration unit 41 adjusts the aeration time according to the sewage inflow and other conditions, the arrangement of the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction pool 4 is adjusted, the roller 1 723 and the roller 2 724 clamp the side wall of the annular reaction pool 4, and under the rotation of the roller 1 723 and the roller 2 724, the carrying box 71 can slide along its annular direction above the annular reaction pool 4, the synchronous belt 732 is driven by the output shaft of the driving motor 731 to drive the threaded rod 733 to rotate, the slide 735 is restricted by the limiting rod 734 and slides along the threaded rod 733, when the slide 735 slides toward the annular reaction pool 4, the flexible membrane is driven to stretch, so that it has the effect of isolating different environments in the annular reaction pool 4, when it is necessary to adjust the arrangement of each link, the flexible membrane gathers and contracts as the slide 735 slides toward the carrying box 71, so as to facilitate the sliding of the carrying box 71, thereby improving the stability of the oxygen content in each environment and improving the sewage treatment effect.

[0054] 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 water treatment device, characterized in that: The invention comprises a pre-anoxic reaction tank (1), a nitrification reaction tank (2), a sedimentation tank (3) and an annular reaction tank (4) for circulating sewage. The annular reaction tank (4) is arranged around the sedimentation tank (3), the nitrification reaction tank (2) and the periphery of the pre-anoxic reaction tank (1). The pre-anoxic reaction tank (1) is arranged at the end of the nitrification reaction tank (2). The sedimentation tank (3) is arranged at one side of the nitrification reaction tank (2). The pre-anoxic reaction tank (1) is connected to the inner cavity of the annular reaction tank (4) through a pipeline. The annular reaction tank (4) is provided with a plurality of aeration units (41) for supplying oxygen to the annular reaction tank (4). The aeration units (41) are arranged in a circular direction of the annular reaction tank (4), and by adjusting the aeration duration of the plurality of aeration units (41), an anaerobic zone, an anoxic zone and an aerobic zone are formed inside the annular reaction tank (4); the nitrification reaction tank (2) is connected to the annular reaction tank (4) through a pipeline, the nitrification reaction tank (2) is connected to the sedimentation tank (3) through a pipeline, a nitrification liquid reflux channel (5) is provided between the sedimentation tank (3) and the annular reaction tank (4), and the sedimentation tank (3) is connected to the pre-anoxic reaction tank (1) and is used to discharge the sludge precipitated in the sedimentation tank (3) into the pre-anoxic reaction tank (1); The annular reaction pool (4) is provided with a plurality of partition mechanisms (7) for partitioning the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction pool (4). The partition mechanisms (7) include a carrying box (71), two moving components (72) and a lifting component (73). The carrying box (71) is hollow inside and is opened toward the annular reaction pool (4). A fixing plate (711) is fixedly connected to the inner wall of the carrying box (71), and the fixing plate (711) fixes the carrying box (71) to the inner wall of the carrying box (71). ) inner cavity is divided into two parts, the two moving components (72) are respectively arranged at the two ends of the inner cavity of the carrying box (71), and the sliding part of the moving component (72) abuts against the side wall of the annular reaction pool (4), the lifting component (73) is arranged at the upper end of the carrying box (71), and the lifting part of the lifting component (73) is penetrated through the carrying box (71) and extends into the annular reaction pool (4), and a flexible membrane is connected to the opening of the carrying box (71), and the flexible membrane is connected to the lifting part of the lifting component (73).

2. The water treatment device according to claim 1, characterized in that: The pre-anoxic reaction tank (1) is connected to a water inlet pipe (11), and a first flow producer (42) and a second flow producer (43) for promoting the flow of sewage are arranged in the annular reaction tank (4), and the first flow producer (42) and the second flow producer (43) are symmetrically arranged along the annular direction of the annular reaction tank (4), and the flow producing directions of the first flow producer (42) and the second flow producer (43) are both clockwise or counterclockwise.

3. The water treatment device according to claim 1, characterized in that: The sedimentation tank (3) is provided with a solid-liquid-gas separation unit (31) for solid-liquid-gas separation of sewage, the solid-liquid-gas separation unit (31) is provided with an aeration unit 2 (32), and the aeration unit 2 (32) is arranged at the bottom of the solid-liquid-gas separation unit (31), the bottom of the solid-liquid-gas separation unit (31) is provided with a sludge discharge port (33) for discharging sludge, and the upper end of the solid-liquid-gas separation unit (31) is provided with a water outlet weir (34) for overflowing water.

4. The water treatment device according to claim 3, characterized in that: A sludge return channel (6) is provided at the end of the sedimentation tank (3), and the sedimentation tank (3) is connected to the pre-anoxic reaction tank (1) through the sludge return channel (6), and one end of the sludge return channel (6) is connected to the sludge discharge port (33) of the solid-liquid-gas separation unit (31).

5. The water treatment device according to claim 4, characterized in that: The exhaust port of the solid-liquid-gas separation unit (31) is connected to an air collecting pipe (35), and the end of the air collecting pipe (35) is connected to the position where the sludge return channel (6) and the sludge discharge port (33) are connected.

6. The water treatment device according to claim 1, characterized in that: The two pre-anoxic reaction tanks (1) are provided, and the two pre-anoxic reaction tanks (1) are respectively provided at the two ends of the nitrification reaction tank (2), and an aeration unit three is provided in the nitrification reaction tank (2).

7. The water treatment device according to claim 1, characterized in that: The moving assembly (72) comprises a telescopic spring 1 (721), a telescopic spring 2 (722), a roller 1 (723), a roller 2 (724), a support block (725), a connecting block (726) and an adjusting block (727). One end of the telescopic spring 1 (721) is fixedly connected to one side of the fixed plate (711), and the other end of the telescopic spring 1 (721) is fixedly connected to the supporting block (725). A groove is provided on the side of the supporting block (725) away from the telescopic spring 1 (721). The roller 1 (723) is rotatably connected in the groove. Both ends of the lower surface of the carrying box (71) are provided with embedded grooves. The side wall of the annular reaction pool (4) extends into the embedded groove. The side wall of the roller 1 (723) abuts against the inner wall of the annular reaction pool (4). The connecting block (726) is provided with a connecting block (727). 26) is fixedly connected to the inner wall of one end of the carrying box (71), and the connecting block (726) is extended toward the telescopic spring one (721), and the connecting block (726) is provided with a sliding groove toward one end of the telescopic spring one (721), and one end of the adjusting block (727) is slidingly connected in the sliding groove, one end of the telescopic spring two (722) is fixedly connected to the connecting block (726), and the end of the adjusting block (727) away from one end of the connecting block (726) is fixedly connected with an extension block (728), the other end of the telescopic spring two (722) abuts against the extension block (728), and the telescopic spring two (722) is sleeved on the adjusting block (727), and the roller two (724) is rotatably connected to the extension block (728) and the roller two (724) abuts against the outer wall of the annular reaction tank (4).

8. The water treatment device according to claim 1, characterized in that: The lifting assembly (73) comprises a driving motor (731), a synchronous belt (732), a threaded rod (733), a limiting rod (734) and a slide (735); the threaded rod (733) is rotatably arranged in the carrying box (71); one end of the threaded rod (733) extends into the annular reaction pool (4); and the other end of the threaded rod (733) extends out of the carrying box (71) and extends vertically upward; one end of the slide (735) is threadedly sleeved on the threaded rod (733); the driving motor (731) is fixedly connected to the carrying box (71); ), and the output shaft of the drive motor (731) is extended downward, the synchronous belt (732) is wrapped around the upper end of the threaded rod (733) and the output shaft of the drive motor (731), the limit rod (734) is fixedly penetrated in the carrying box (71), and the limit rod (734) extends into the annular reaction pool (4), the other end of the slide (735) is slidably sleeved on the limit rod (734), one end of the flexible membrane is fixedly connected to the opening of the carrying box (71), and the other end of the flexible membrane is fixedly connected to the side wall of the slide (735).

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