Water treatment device

Abstract

The application discloses a water treatment device and relates to the technical field of sewage treatment. The device comprises a pre-anoxic reaction tank, a nitrification reaction tank, a sedimentation tank and a ring-shaped reaction tank. The ring-shaped reaction tank is arranged around the periphery of the sedimentation tank, the nitrification reaction tank and 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 ring-shaped reaction tank. A plurality of aeration units are arranged in the ring-shaped reaction tank. The aeration units are arranged along the ring direction of the ring-shaped reaction tank. The nitrification reaction tank is connected with the ring-shaped reaction tank. The sedimentation tank is connected with the ring-shaped reaction tank. A nitrification liquid reflux channel is arranged between the sedimentation tank and the ring-shaped reaction tank. The sedimentation tank is connected with the pre-anoxic reaction tank. The application can improve the effect of sewage treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a water treatment device. BACKGROUND

[0002] With the development of urbanization process, the number of urban population is increasing, and the sewage treatment water quantity of urban sewage treatment plant is increasing, so that the sewage treatment plant structures and equipment are often in full load or overload state, in order to solve the current problems of sewage treatment plant, the traditional sewage treatment plant often needs to be increased in capacity or the traditional sewage treatment plant is newly built.

[0003] Due to the reasons such as planning land, the land required for the traditional sewage treatment plant increased in capacity or the traditional sewage treatment plant newly built is often more, and the construction cost is high, and the construction period is relatively long, so at present, the sewage treatment equipment of AAO activated sludge method is often used, that is, by combining the organic matters of three different environmental conditions of anaerobic, anoxic and aerobic, the sewage is first discharged into the anaerobic zone, the macromolecular organic matters are decomposed into small molecular organic matters under the anoxic condition, and the phosphorus is released at the same time, then the sewage is discharged into the anoxic zone, the nitrate is reduced to nitrogen by using the denitrifying bacteria, and the denitrification is realized, finally, the sewage is discharged into the aerobic zone, the ammonia nitrogen is converted into nitrate, and the organic matters and phosphorus are further removed by the metabolic action of microorganisms, and the synchronous removal of organic matters, nitrogen and phosphorus is realized.

[0004] But the existing sewage treatment equipment has single function attribute, cannot flexibly adjust the three different environmental conditions according to the actual conditions such as the inflow water quantity and water quality fluctuation of sewage, and the sewage treatment effect is poor, therefore, the present application provides a new scheme. SUMMARY

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

[0006] The present application provides a kind of, adopt following technical scheme:

[0007] The utility model provides a water treatment device, including pre -oxygen -starved reaction pool, nitrification reaction pool, sedimentation tank and for sewage circulation flow annular reaction pool, the annular reaction pool is around the setting of sedimentation tank, nitrification reaction pool and pre -oxygen -starved reaction pool periphery setting, pre -oxygen -starved reaction pool sets up in the end of nitrification reaction pool, the sedimentation tank sets up in one side of nitrification reaction pool, pre -oxygen -starved reaction pool and annular reaction pool inner chamber are connected through the pipeline, be provided with a plurality of for the oxygen supply of annular reaction pool in annular reaction pool and set up a plurality of aeration unit one, a plurality of aeration unit one are arranged along the annular direction of annular reaction pool, and through adjusting a plurality of aeration unit one's aeration length of time makes the inside of annular reaction pool form anaerobic zone, anoxic zone and aerobic zone, nitrification reaction pool and annular reaction pool are connected through the pipeline, nitrification reaction pool and sedimentation tank are connected through the pipeline, be provided with nitrification liquid reflux channel between sedimentation tank and annular reaction pool, the sedimentation tank is connected with pre -oxygen -starved reaction pool, and for the sludge of sedimentation tank is arranged in pre -oxygen -starved reaction pool in sedimentation tank;

[0008] Be provided with several for the partition mechanism of partitioning anaerobic zone, anoxic zone and aerobic zone in annular reaction pool in annular reaction pool, the partition mechanism includes bearing box, two mobile assemblies and lifting assembly, the inside of bearing box is hollow and is open to annular reaction pool, the inner wall of bearing box is fixedly connected with fixed plate, and fixed plate divides bearing box inner chamber into two parts, two mobile assemblies are arranged at the both ends in bearing box inner chamber, and the sliding part of mobile assembly is in contact with the side wall of annular reaction pool, lifting assembly is arranged at the upper end of bearing box, and the lifting part of lifting assembly penetrates in bearing box and extends into annular reaction pool, the opening of bearing box is connected with flexible film, and the lifting part of lifting assembly is connected with the lifting part of lifting assembly.

[0009] Optionally, the pre-oxygen-starved reaction pool is communicated with a water inlet pipe, the annular reaction pool is provided with a first flow promoter and a second flow promoter for promoting the flow of sewage, and the first flow promoter and the second flow promoter are symmetrically arranged along the annular direction of the annular reaction pool. The flow directions of the first flow promoter and the second flow promoter are both clockwise or both counterclockwise.

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

[0011] Optionally, the end of the sedimentation tank is provided with a sludge reflux channel, and the sedimentation tank is communicated with the pre-oxygen-starved reaction pool through the sludge reflux channel. One end of the sludge reflux channel is connected with 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 with a gas collecting pipe, and the end of the gas collecting pipe is connected to the position where the sludge backflow channel meets the sludge discharge port.

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

[0014] Optionally, the moving assembly comprises a first telescopic spring, a second telescopic spring, a first roller, a second roller, a supporting block, a connecting block and an adjusting block, one end of the first telescopic spring is fixedly connected to one side of the fixed plate, and the other end of the first telescopic spring is fixedly connected with the supporting block, a groove is formed in the side of the supporting block away from the first telescopic spring, the first roller is rotatably connected in the groove, and the side wall of the first roller abuts against the inner wall of the annular reaction tank, the connecting block is fixedly connected to the inner wall of one end of the bearing box, and the connecting block extends towards the first telescopic spring, a sliding groove is formed in one end of the adjusting block towards the first telescopic spring, one end of the adjusting block is slidingly connected in the sliding groove, and the other end of the adjusting block is rotatably connected with the second roller, one end of the second telescopic spring is fixedly connected to the connecting block, the end of the adjusting block away from the connecting block is fixedly connected with an extension block, the other end of the second telescopic spring abuts against the extension block, and the second telescopic spring is sleeved on the adjusting block, and the second roller abuts against the outer wall of the annular reaction tank.

[0015] Optionally, the lifting assembly comprises a driving motor, a synchronous belt, a threaded rod, a limiting rod and a sliding table, the threaded rod is rotatably arranged in the bearing box, one end of the threaded rod extends into the annular reaction tank, and the other end of the threaded rod extends out of the bearing box and vertically upward, one end of the sliding table is threadedly sleeved on the threaded rod, the driving motor is fixedly connected to the upper end of the bearing box, and the output shaft of the driving motor extends downward, the synchronous belt is sleeved around the upper end of the threaded rod and the output shaft of the driving motor, the limiting rod is fixedly arranged in the bearing box and extends into the annular reaction tank, and the other end of the sliding table is slidingly sleeved on the limiting rod, one end of the flexible film is fixedly connected to the opening of the bearing box, and the other end of the flexible film is fixedly connected to the side wall of the sliding table.

[0016] In summary, the present application has the following beneficial technical effects: according to the water inflow and water quality of sewage, the plurality of aeration units one in the annular reaction tank are controlled, so that the anaerobic zone, anoxic zone and aerobic zone are formed 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 plurality of aeration units one, the annular reaction tank, the pre-anoxic reaction tank, the nitrification reaction tank and the sedimentation tank are sequentially communicated, the circulating treatment of sewage is realized, and the effect of improving the sewage treatment is achieved. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] Figure 2 is a schematic diagram of the structure of the solid-liquid-gas separation unit of the embodiment one of the present application;

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

[0020] Figure 4 is a schematic diagram of the structure of the moving assembly of the embodiment two of the present application.

[0021] Legend: 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 two; 33, sludge discharge port; 34, water outlet weir; 35, gas collecting pipe; 4, annular reaction tank; 41, aeration unit one; 42, first flow inducer; 43, second flow inducer; 5, nitrification liquid reflux channel; 6, sludge reflux channel; 7, partition mechanism; 71, bearing box; 711, fixed plate; 72, moving assembly; 721, extension spring one; 722, extension spring two; 723, roller one; 724, roller two; 725, support block; 726, connecting block; 727, adjusting block; 728, extension block; 73, lifting assembly; 731, drive motor; 732, synchronous belt; 733, threaded rod; 734, limiting rod; 735, sliding table. DETAILED DESCRIPTION

[0022] The following will be described in detail in combination with the accompanying Figures 1-4 The present application will be further described in detail.

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

[0024] Reference Figures 1-4 The water treatment device comprises 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 periphery of the sedimentation tank 3, the nitrification reaction tank 2 and the pre-anoxic reaction tank 1, and is used for circulating flow of sewage, 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, and the pre-anoxic reaction tank 1 and the inner cavity of the annular reaction tank 4 are connected in communication through a sewage pipeline.

[0025] A plurality of aeration units 41 for supplying oxygen to the inner cavity of the annular reaction tank 4 are arranged in the annular reaction tank 4. The plurality of aeration units 41 are arranged along the annular direction of the annular reaction tank 4. By controlling the aeration time and aeration frequency of the plurality of aeration units 41, an anaerobic zone, an anoxic zone and an aerobic zone are formed in the annular reaction tank 4. (The aeration units 41 in this embodiment and the aeration units 32 and 33 mentioned below are all jet-type aerators commonly used in sewage treatment equipment.)

[0026] The nitrification reaction tank 2 and the sedimentation tank 3 are connected by a pipeline. The sedimentation tank 3 and the annular reaction tank 4 are provided with a nitrification liquid reflux channel 5 for refluxing nitrification liquid. The nitrification liquid in the sedimentation tank 3 is discharged into the annular reaction tank 4 through the nitrification liquid reflux channel 5, so as to facilitate the nitrification reaction in the annular reaction tank 4.

[0027] The sedimentation tank 3 and the pre-anoxic reaction tank 1 are connected and 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 the degradation of sewage, so as to improve the effect of decomposition of the organic matter in the biodegradable part of the sewage in the pre-anoxic reaction tank 1.

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

[0029] The pre-anoxic reaction tank 1 is pre-filled with reflux sludge rich in microorganisms, and sewage is injected into the pre-anoxic reaction tank 1. After anaerobic decomposition by the microorganisms, the biodegradable part of the organic matter in the sewage is decomposed, and denitrification is performed, thereby reducing the content of nitrogen 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. Subsequently, the sewage enters the nitrification reaction tank 2 to perform further nitrification reaction.

[0031] Finally, the sewage enters the sedimentation tank 3 to perform sedimentation and separation. The treated sewage is discharged to the outside of the device, a part of the sludge is discharged into the annular reaction tank 4 as nitrification liquid through the nitrification liquid reflux channel 5 to provide nitrate nitrogen for denitrifying bacteria to complete denitrification, and another part of the sludge is discharged into the pre-anoxic reaction tank 1 as reflux sludge to achieve the treatment of the sewage.

[0032] When the sewage continuously circulates and degrades in the anaerobic zone, the anoxic zone and the aerobic zone of the annular reaction tank 4, the aeration time and the working frequency of different aeration units 41 can be controlled according to the actual conditions such as the inflow water quantity and the water quality fluctuation of the sewage, so as to flexibly control the arrangement of the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction tank 4, thereby improving the effect of sewage treatment.

[0033] Referring to Figure 1 In order to promote the denitrification of microorganisms in the pre-anoxic reaction tank 1, a water inlet pipe 11 is connected to the pre-anoxic reaction tank 1, and water is supplied to the pre-anoxic reaction tank 1 through the water inlet pipe 11 to provide the necessary carbon source for the denitrification of microorganisms. At the same time, the organic matter in the water provides energy for the growth of microorganisms, ensuring the activity of microorganisms in the pre-anoxic reaction tank 1 and improving the effect of wastewater treatment in the pre-anoxic reaction tank 1.

[0034] In order to facilitate the separation of the anaerobic zone, anoxic zone and 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 comprises a bearing box 71, two moving assemblies 72 and a lifting assembly 73. The bearing box 71 is arranged at the upper end of the annular reaction tank 4, and the inside of the bearing box 71 is hollow and open towards the annular reaction tank 4. A fixed plate 711 is fixedly connected to the inner wall of the bearing box 71 by bolts, which separates the two ends of the bearing box 71. The two moving assemblies 72 are located in the inner cavity of the bearing box 71 and are arranged on the two sides of the fixed plate 711. The sliding part of the moving assembly 72 abuts against the side wall of the annular reaction tank 4, so that the bearing box 71 is slidingly connected to the annular reaction tank 4. The lifting assembly 73 is arranged at the upper end of the bearing box 71, and the lifting part of the lifting assembly 73 penetrates the bearing box 71 and extends into the annular reaction tank 4. The bearing box 71 is connected to a flexible membrane at the opening thereof. One end of the flexible membrane is fixed to the lower surface of the bearing box 71, and the other end of the flexible membrane is connected to the lifting part of the lifting assembly 73 (the flexible membrane in this embodiment is a flexible ceramic membrane commonly used for partitioning various regions in wastewater treatment).

[0036] When the aeration of each aeration unit 41 is adjusted according to the water quantity and quality fluctuations of the wastewater to control the anaerobic zone, anoxic zone and aerobic zone in the annular reaction tank 4, the bearing box 71 slides in the annular reaction tank 4 through the moving assembly 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 assembly 73 to separate the anaerobic zone, anoxic zone and aerobic zone in the annular reaction tank 4 when different aeration units 41 are aeration, improve the stability of oxygen content in different environments, and improve the effect of wastewater treatment. It should be noted that when the wastewater in the annular reaction tank 4 is circulated, the flexible membrane needs to be lifted by the lifting assembly 73 to make the circulation of the wastewater work normally.

[0037] The annular reaction tank 4 is equipped with a first flow promoter 42 and a second flow promoter 43 to propel the wastewater through continuous circulation in the anaerobic, anoxic, and aerobic zones. The first flow promoter 42 and the second flow promoter 43 are symmetrically arranged on both sides of the annular reaction tank 4 along its annular direction, and their flow directions are either clockwise or both counterclockwise (in this embodiment, both the first flow promoter 42 and the second flow promoter 43 are submersible flow promoters commonly used in wastewater treatment). The first flow promoter 42 and the second flow promoter 43 are arranged adjacent to each other along the annular direction of the annular reaction tank 4, and their flow directions are opposite to each other.

[0038] Reference Figure 2 The sedimentation tank 3 is equipped with a solid-liquid-gas separation unit 31 for separating solids, liquids, and gases in wastewater. The solid-liquid-gas separation unit 31 is a solid-liquid-gas separator that is already used in wastewater treatment. The solid-liquid-gas separation unit 31 is equipped with an aeration unit 32, which is located at the bottom of the solid-liquid-gas separation unit 31. The bottom of the solid-liquid-gas separation unit 31 has a sludge discharge port 33 for sludge discharge, and the upper end of the solid-liquid-gas separation unit 31 has an overflow weir 34 for overflowing water. The side wall of the solid-liquid-gas separation unit 31 also has an exhaust port for gas discharge.

[0039] With the above setup, when sewage flows into sedimentation tank 3 and undergoes solid-liquid-gas separation unit 31 for solid, liquid, and gas separation, aeration unit 32 introduces air into the sewage to increase the dissolved oxygen content in the water and promote biological degradation. The separated sludge is discharged from solid-liquid-gas separation unit 31 through sludge discharge port 33. After circulation, the qualified sewage overflows from solid-liquid-gas separation unit 31 through effluent weir 34. The gas separated by solid-liquid-gas separation unit 31 is discharged from solid-liquid-gas separation unit 31 through exhaust port, thus completing the solid, liquid, and gas separation of sewage.

[0040] Reference Figure 1 and Figure 2 To facilitate sludge 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 connect them. 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 portion 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 as returned sludge through the sludge return channel 6, promoting the decomposition of organic matter in the wastewater in the pre-anoxic reaction tank 1 and achieving the effect of recycling.

[0041] In order to facilitate the sludge from the sludge discharge port 33 through the sludge reflux channel 6 into the pre-anoxic reaction tank 1, the exhaust port of the solid-liquid-gas separation unit 31 is connected with a gas collecting pipe 35, and 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 into the sludge reflux channel 6 from the joint of the sludge reflux channel 6 and the sludge discharge port 33, so as to ensure that the gas in the gas collecting pipe 35 can push the sludge flowing into the sludge reflux channel 6.

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

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

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

[0045] The implementation principle of the embodiment is that the sewage subjected to anaerobic decomposition in the pre-anoxic reaction tank 1 is introduced into the annular reaction tank 4. The aeration unit one 41 in the annular reaction tank 4 adjusts the aeration time and working frequency according to the water inflow and water quality of the sewage, so as to divide the annular reaction tank 4 into anaerobic zone, anoxic zone and aerobic zone. The sewage is continuously degraded and treated in the annular reaction tank 4, so as to improve the effect of sewage treatment. The sewage subjected to degradation in the annular reaction tank 4 is introduced into the nitrification reaction tank 2 through the sewage pipeline. The sewage subjected to nitrification reaction is introduced into the solid-liquid-gas separation unit 31 in the sedimentation tank 3 for solid-liquid-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 reflux channel 6, so as to provide microorganisms beneficial to the degradation of organic matter for the subsequent injected sewage. The gas discharged from the solid-liquid-gas separation unit 31 is collected by the gas collecting pipe 35 and then discharged into the sludge reflux channel 6, so as to push the sludge to flow into the pre-anoxic reaction tank 1, and improve the effect of sewage treatment.

[0046] Referring to Figure 4The moving assembly 72 comprises telescopic spring one 721, telescopic spring two 722, roller one 723, roller two 724, support block 725, connecting block 726 and adjusting block 727, one end of the telescopic spring one 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 one 721, and the end of the support block 725 away from the telescopic spring one 721 is provided with a groove, the roller one 723 is rotatably connected in the groove, the two ends of the lower surface of the bearing box 71 are provided with embedding grooves, the side wall of the annular reaction tank 4 extends into the embedding grooves, and the roller one 723 abuts against the inner wall of the annular reaction tank 4.

[0047] The connecting block 726 is welded to the inner wall of one end of the bearing box 71, and the connecting block 726 is arranged to extend towards the telescopic spring one 721, the connecting block 726 is provided with a sliding groove at the end thereof towards the telescopic spring one 721, one end of the adjusting block 727 is slidably connected in the sliding groove, and the other end of the adjusting block 727 extends out of the sliding groove and is rotatably connected with the roller two 724, the end of the adjusting block 727 extending out of the sliding groove is welded with an extension block 728, the telescopic spring two 722 is sleeved on the adjusting block 727, and the two ends of the telescopic spring two 722 respectively abut against the connecting block 726 and the extension block 728, and the roller two 724 abuts against the outer wall of the annular reaction tank 4.

[0048] Through the above arrangement, the roller one 723 and the roller two 724 abut against the inner wall and the side wall of the annular reaction tank 4 respectively, so that the bearing box 71 can slide along the annular direction of the annular reaction tank 4 above the annular reaction tank 4. When the bearing box 71 slides in the annular curved section of the annular reaction tank 4, the roller one 723 and the roller two 724 respectively extend and retract through the telescopic spring one 721 and the telescopic spring two 722, so that the roller one 723 and the roller two 724 always abut against the side wall and the inner wall of the annular reaction tank 4 to adapt to the sliding of the partition mechanism 7 in the annular reaction tank 4. It should be noted that the roller is rotatably connected to the inner wall of the bearing box 71, and the roller abuts against the upper surface of the annular reaction tank to facilitate the sliding of the bearing box 71.

[0049] Referring to Figure 3 With Figure 4The lifting assembly 73 comprises a driving motor 731, a synchronous belt 732, a threaded rod 733, a limiting rod 734 and a sliding table 735. The threaded rod 733 is arranged to pass through the bearing box 71 and is arranged vertically. The lower end of the threaded rod 733 extends into the annular reaction tank 4, and the upper end of the threaded rod 733 extends out of the bearing box 71. One end of the sliding table 735 is threadedly sleeved on the threaded rod 733, and the sliding table 735 is located below the bearing box 71. The upper surface of the bearing box 71 is fixed with a connecting frame by bolts. The driving motor 731 is arranged on the connecting frame and is fixed by bolts. The output shaft of the driving motor 731 extends downward and is connected with the synchronous belt 732 through a gear structure. The synchronous belt 732 is arranged 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. The limiting rod 734 is fixedly arranged through the bearing box 71, and the lower end of the limiting rod 734 extends into the annular reaction tank 4. The other end of the sliding table 735 is slidably sleeved on the limiting rod 734.

[0050] Pressing plates are arranged at the opening of the bearing box 71 and the upper end of the sliding table 735 respectively. The flexible film is fixed between the bearing box 71 and the sliding table 735 by the pressing plates. When the sliding table 735 slides towards the annular reaction tank 4, one end of the flexible film moves with the sliding table 735, so that the flexible film is unfolded and separates the environments in the annular reaction tank 4. It should be noted that when the sewage is circulated, the flexible film needs to be retracted to ensure the effect of sewage circulation. Therefore, the driving motor 731 in the embodiment can be a servo motor capable of forward and reverse rotation, and the length of the flexible film needs to be greater than the lowest height of the sliding table 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 sliding table 735 slides along the threaded rod 733 under the limitation of the limiting rod 734. When the sliding table 735 slides towards the annular reaction tank 4, the flexible film gradually unfolds and separates the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction tank 4. When each aeration unit 41 adjusts the aeration according to the water inflow and water quality, the output shaft of the driving motor 731 drives the sliding table 735 to slide towards the bearing box 71, and the flexible film is gathered and recovered, so that the bearing box 71 adjusts its position in the annular reaction tank 4 according to different environments.

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

[0053] The implementation principle of the embodiment is as follows: when each aeration unit 41 adjusts the aeration time according to the influent amount of sewage and other conditions, the arrangement of the anaerobic zone, the anoxic zone and the aerobic zone in the annular reaction tank 4 is adjusted; the roller one 723 and the roller two 724 clamp the side wall of the annular reaction tank 4, and under the rotation of the roller one 723 and the roller two 724, the bearing box 71 can slide along the annular direction of the annular reaction tank 4 above the annular reaction tank 4; under the driving of the output shaft of the driving motor 731, the synchronous belt 732 drives the threaded rod 733 to rotate; the sliding table 735 is limited by the limiting rod 734 and slides along the threaded rod 733; when the sliding table 735 slides towards the inside of the annular reaction tank 4, the flexible film is stretched, which plays a role of separating different environments in the annular reaction tank 4; when it is necessary to adjust the arrangement of each link, the flexible film is gathered and shrunk when the sliding table 735 slides towards the bearing box 71, so as to facilitate the sliding of the bearing box 71, improve the stability of the oxygen content in each environment, and improve the effect of sewage treatment.

[0054] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application; therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water treatment device, characterized by: The utility model relates to a sewage treatment device, including pre -oxygen -starved reaction pool (1), nitrification reaction pool (2), sedimentation tank (3) and for sewage circulation flow annular reaction pool (4), the annular reaction pool (4) is set up around the periphery of sedimentation tank (3), nitrification reaction pool (2) and pre -oxygen -starved reaction pool (1), pre -oxygen -starved reaction pool (1) is set up in the end of nitrification reaction pool (2), sedimentation tank (3) is set up in one side of nitrification reaction pool (2), pre -oxygen -starved reaction pool (1) is connected with the inner chamber of annular reaction pool (4) through the pipeline, the inner chamber of annular reaction pool (4) is provided with multiple aeration unit (41) for supplying oxygen to annular reaction pool (4), multiple aeration unit (41) are arranged along the annular direction of annular reaction pool (4), and the inside of annular reaction pool (4) forms anaerobic zone, anoxic zone and aerobic zone by adjusting the aeration length of multiple aeration unit (41), nitrification reaction pool (2) is connected with annular reaction pool (4) through the pipeline, nitrification reaction pool (2) is connected with sedimentation tank (3) through the pipeline, and the backflow channel (5) of nitrification liquid is arranged between sedimentation tank (3) and annular reaction pool (4), sedimentation tank (3) is connected with pre -oxygen -starved reaction pool (1), and is used for the sludge of sedimentation tank (3) is arranged in pre -oxygen -starved reaction pool (1); The utility model relates to a sewage treatment device, including pre -oxygen -starved reaction pool (1), nitrification reaction pool (2), sedimentation tank (3) and for sewage circulation flow annular reaction pool (4), the annular reaction pool (4) is set up around the periphery of sedimentation tank (3), nitrification reaction pool (2) and pre -oxygen -starved reaction pool (1), pre -oxygen -starved reaction pool (1) is set up in the end of nitrification reaction pool (2), sedimentation tank (3) is set up in one side of nitrification reaction pool (2), pre -oxygen -starved reaction pool (1) is connected with the inner chamber of annular reaction pool (4) through the pipeline, the inner chamber of annular reaction pool (4) is provided with multiple aeration unit (41) for supplying oxygen to annular reaction pool (4), multiple aeration unit (41) are arranged along the annular direction of annular reaction pool (4), and the inside of annular reaction pool (4) forms anaerobic zone, anoxic zone and aerobic zone by adjusting the aeration length of multiple aeration unit (41), nitrification reaction pool (2) is connected with annular reaction pool (4) through the pipeline, nitrification reaction pool (2) is connected with sedimentation tank (3) through the pipeline, and the backflow channel (5) of nitrification liquid is arranged between sedimentation tank (3) and annular reaction pool (4), sedimentation tank (3) is connected with pre -oxygen -starved reaction pool (1), and is used for the sludge of sedimentation tank (3) is arranged in pre -oxygen -starved reaction pool (1); 2. The water treatment device of claim 1, wherein: The utility model relates to a sewage treatment device, including pre -oxygen -starved reaction pool (1), nitrification reaction pool (2), sedimentation tank (3) and for sewage circulation flow annular reaction pool (4), the annular reaction pool (4) is set up around the periphery of sedimentation tank (3), nitrification reaction pool (2) and pre -oxygen -starved reaction pool (1), pre -oxygen -starved reaction pool (1) is set up in the end of nitrification reaction pool (2), sedimentation tank (3) is set up in one side of nitrification reaction pool (2), pre -oxygen -starved reaction pool (1) is connected with the inner chamber of annular reaction pool (4) through the pipeline, the inner chamber of annular reaction pool (4) is provided with multiple aeration unit (41) for supplying oxygen to annular reaction pool (4), multiple aeration unit (41) are arranged along the annular direction of annular reaction pool (4), and the inside of annular reaction pool (4) forms anaerobic zone, anoxic zone and aerobic zone by adjusting the aeration length of multiple aeration unit (41), nitrification reaction pool (2) is connected with annular reaction pool (4) through the pipeline, nitrification reaction pool (2) is connected with sedimentation tank (3) through the pipeline, and the backflow channel (5) of nitrification liquid is arranged between sedimentation tank (3) and annular reaction pool (4), sedimentation tank (3) is connected with pre -oxygen -starved reaction pool (1), and is used for the sludge of sedimentation tank (3) is arranged in pre -oxygen -starved reaction pool (1); The utility model relates to a sewage treatment device, including pre -oxygen -starved reaction pool (1), nitrification reaction pool (2), sedimentation tank (3) and for sewage circulation flow annular reaction pool (4), the annular reaction pool (4) is set up around the periphery of sedimentation tank (3), nitrification reaction pool (2) and pre -oxygen -starved reaction pool (1), pre -oxygen -starved reaction pool (1) is set up in the end of nitrification reaction pool (2), sedimentation tank (3) is set up in one side of nitrification reaction pool (2), pre -oxygen -starved reaction pool (1) is connected with the inner chamber of annular reaction pool (4) through the pipeline, the inner chamber of annular reaction pool (4) is provided with multiple aeration unit (41) for supplying oxygen to annular reaction pool (4), multiple aeration unit (41) are arranged along the annular direction of annular reaction pool (4), and the inside of annular reaction pool (4) forms anaerobic zone, anoxic zone and aerobic zone by adjusting the aeration length of multiple aeration unit (41), nitrification reaction pool (2) is connected with annular reaction pool (4) through the pipeline, nitrification reaction pool (2) is connected with sedimentation tank (3) through the pipeline, and the backflow channel (5) of nitrification liquid is arranged between sedimentation tank (3) and annular reaction pool (4), sedimentation tank (3) is connected with pre -oxygen -starved reaction pool (1), and is used for the sludge of sedimentation tank (3) is arranged in pre -oxygen -starved reaction pool (1) 3. The water treatment device of claim 1, wherein: 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 two (32), and the aeration unit two (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 overflow of water.

4. The water treatment device of claim 3, wherein: The end of the sedimentation tank (3) is provided with a sludge reflux channel (6), and the sedimentation tank (3) is communicated with the pre-anoxic reaction tank (1) through the sludge reflux channel (6), one end of the sludge reflux channel (6) is communicated with the sludge discharge port (33) of the solid-liquid-gas separation unit (31).

5. The water treatment device of claim 4, wherein: The exhaust port of the solid-liquid-gas separation unit (31) is connected with a gas collecting pipe (35), and the end of the gas collecting pipe (35) is connected to the position where the sludge reflux channel (6) and the sludge discharge port (33) are connected.

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

7. The water treatment device of claim 1, wherein: The moving assembly (72) comprises a telescopic spring one (721), a telescopic spring two (722), a roller one (723), a roller two (724), a supporting block (725), a connecting block (726) and an adjusting block (727), one end of the telescopic spring one (721) is fixedly connected to one side of the fixed plate (711), and the other end of the telescopic spring one (721) is fixedly connected with the supporting block (725), the side of the supporting block (725) away from the telescopic spring one (721) is provided with a groove, the roller one (723) is rotatably connected in the groove, the two ends of the lower surface of the bearing box (71) are provided with embedding grooves, the side wall of the ring-shaped reaction tank (4) extends into the embedding grooves, the side wall of the roller one (723) abuts against the inner wall of the ring-shaped reaction tank (4), the connecting block (726) is fixedly connected to the inner wall of one end of the bearing box (71), and the connecting block (726) extends towards the telescopic spring one (721), one end of the connecting block (726) is provided with a sliding groove, one end of the adjusting block (727) is slidably connected in the sliding groove, one end of the telescopic spring two (722) is fixedly connected to the connecting block (726), the end of the adjusting block (727) away from 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), the roller two (724) is rotatably connected to the extension block (728) and abuts against the outer wall of the ring-shaped reaction tank (4).

8. The water treatment device of claim 1, wherein: The lifting assembly (73) comprises a driving motor (731), a synchronous belt (732), a threaded rod (733), a limiting rod (734) and a sliding table (735), one end of the threaded rod (733) is inserted into the annular reaction tank (4), the other end of the threaded rod (733) is vertically upwardly extended out of the bearing box (71), one end of the sliding table (735) is threadedly sleeved on the threaded rod (733), the driving motor (731) is fixedly connected to the upper end of the bearing box (71), and the output shaft of the driving motor (731) is downwardly extended, the synchronous belt (732) is annularly sleeved on the upper end of the threaded rod (733) and the output shaft of the driving motor (731), the limiting rod (734) is fixedly inserted into the bearing box (71) and extends into the annular reaction tank (4), the other end of the sliding table (735) is slidably sleeved on the limiting rod (734), one end of the flexible film is fixedly connected to the opening of the bearing box (71), and the other end of the flexible film is fixedly connected to the side wall of the sliding table (735).

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