Sewage treatment system, method for constructing a sewage treatment system, and sewage treatment cylinder

Abstract

The present invention provides a sewage treatment system, a construction method of the sewage treatment system, and a sewage treatment cylinder. The sewage treatment system includes a base layer and a cylindrical sewage treatment tank mounted on the base layer. The sewage treatment tank includes a first treatment space surrounded by a side wall. The interior of the first treatment space is divided into three adjacent partitions in order: an anaerobic zone, an anoxic zone, and an aerobic zone. Each partition vertically penetrates from the top to the bottom of the sewage treatment tank, and two adjacent partitions are sequentially communicated. Thereby, the sewage in the sewage treatment tank flows through the anaerobic zone, the anoxic zone, and the aerobic zone in order along a vertical meandering path. Above the base layer, a plurality of layers of process platforms arranged in order from top to bottom are constructed surrounding the sewage treatment tank. The process platforms are also used to carry secondary sedimentation equipment for treating the sewage discharged from the sewage treatment tank, advanced treatment equipment, and power distribution equipment for the operation and maintenance of the sewage treatment tank. It reduces the construction land area and improves the space utilization rate of the horizontal plane.

Description

[Technical Field]

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment system, a method for constructing a wastewater treatment system, and a wastewater treatment cylinder. [Background technology]

[0002] Existing wastewater treatment methods mainly include constructed wetlands, stabilization ponds, domestic wastewater biogas pools, and biofilm treatment technologies. Each of these technologies currently suffers from certain shortcomings. For example, constructed wetlands and stabilization ponds require large areas and are highly susceptible to climate change. Biogas pools are unable to adequately treat wastewater, resulting in high levels of pollutants in the discharged water. Biofilm technology is too expensive and prone to clogging after long-term operation. However, tank and cylinder-based wastewater treatment technologies are still in their infancy and suffer from outdated treatment process technology, low wastewater reuse rates, large areas, limited land availability, and difficult renovation and expansion. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the problems existing in the above-mentioned technologies, and in order to solve the problems at least to some extent, a first object of the present invention is to propose a wastewater treatment system that reduces the construction land and improves the utilization rate of horizontal space.

[0004] A second object of the present invention is to propose a method for constructing the above-mentioned wastewater treatment system.

[0005] A third object of the present invention is to propose a sewage treatment cylinder that can easily be connected to adjacent sewage treatment cylinders by sealing with a seal ring. [Means for solving the problem]

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] In a first aspect, the present invention provides a method for producing a pharmaceutical composition comprising: The wastewater treatment system includes a base layer and a cylindrical wastewater treatment tank mounted on the base layer, the wastewater treatment tank including a first treatment space surrounded by a side wall, the interior of the first treatment space including three partitions adjacent to each other in sequence, namely, an anaerobic zone, an anoxic zone, and an aerobic zone, each partition penetrating vertically from the top to the bottom of the wastewater treatment tank, with adjacent two partitions being connected in sequence, so that wastewater in the wastewater treatment tank flows sequentially through the anaerobic zone, the anoxic zone, and the aerobic zone along a vertical serpentine path, and a multi-layered process platform arranged in order from top to bottom is constructed above the base layer surrounding the wastewater treatment tank, and the process platform is used to mount secondary sedimentation equipment for treating wastewater discharged from the wastewater treatment tank, advanced treatment equipment, and power distribution equipment for operating and maintaining the wastewater treatment tank.

[0008] Optionally, the multiple process platforms include a first process platform located at the top, and a second process platform located below the first process platform and immediately adjacent to the first process platform, the first process platform being equipped with multiple secondary sedimentation facilities surrounding the sewage treatment pond, and the second process platform being equipped with multiple advanced treatment facilities surrounding the sewage treatment pond, the secondary sedimentation facilities being connected to the sewage discharge outlet of the sewage treatment pond, and the advanced treatment facilities being connected to the purified water outlet of the secondary sedimentation facilities.

[0009] Optionally, above the foundation layer, four process platforms, namely, a first process platform, a second process platform, a third process platform, and a fourth process platform, arranged in order from top to bottom, are constructed surrounding the wastewater treatment pond, and the third process platform is equipped with power distribution equipment for operating and maintaining the wastewater treatment pond.

[0010] Optionally, the base layer is equipped with a solid-liquid separator, a central pressure pump station, a sludge dewatering machine, a packing machine, and an emergency wastewater discharge device, wherein the solid-liquid separator is used to roughly filter the wastewater from the central pressure pump station, the central pressure pump station is used to send the roughly filtered wastewater from the top of the wastewater treatment pond into the wastewater treatment pond, the sludge dewatering machine is used to dewater the sludge in the sludge pond, the packing machine is used to pack the dewatered sludge into sludge bricks, and the emergency wastewater discharge device is used to discharge wastewater leaked into the base layer in the event of a leak from the wastewater treatment pond.

[0011] Optionally, the first treatment space is partitioned around the axis of the sewage treatment pond, each partition being a sector with its apex on the axis of the sewage treatment pond.

[0012] Optionally, the sewage treatment tank further includes an outer peripheral wall surrounding the side wall at a distance, the side wall and the outer peripheral wall forming an installation space, a vertically extending core tube is provided on the central axis of the first treatment space, and multiple partitions are provided surrounding the core tube, and the inside of the core tube is divided into three closed areas arranged from top to bottom, respectively functioning as a fire water tank, a clean water tank, and a sludge tank.

[0013] Optionally, the anaerobic zone, the anoxic zone, and the aerobic zone each have at least one sub-zone, each of which is fan-shaped with its apex on the axis of the sewage treatment pond and all of which have the same volume, and each of which has a water passage hole formed at the bottom end of the sewage treatment cylinder to one adjacent sub-zone, and a communication portion formed at the top end of the sewage treatment cylinder to another adjacent sub-zone.

[0014] In a second aspect, the present invention provides a method for producing a pharmaceutical composition comprising: constructing a foundation layer; a step of installing one sewage treatment cylinder above the base layer, or installing at least two sewage treatment cylinders stacked in order from bottom to top, to form a sewage treatment pond, wherein the sewage treatment cylinder includes a second treatment space surrounded by a side wall, the inside of the second treatment space is divided into a plurality of partitions with different treatment functions, each partition vertically penetrates from the top to the bottom of the sewage treatment cylinder, and the partitions with the same function of adjacent sewage treatment cylinders communicate with each other; constructing a process platform around the periphery of the wastewater treatment pond.

[0015] In a third aspect, the present invention provides a method for producing a pharmaceutical composition comprising: The device includes a cylindrical body surrounded by a side wall and open at both the upper and lower ends, and a plurality of guide rails extending in the up-down direction are provided at the lower end of the outer wall of the cylindrical body, evenly spaced along the circumferential direction of the cylindrical body, and a plurality of guide blocks are provided at the upper end of the outer wall of the cylindrical body corresponding to the plurality of guide rails, A U-shaped frame is connected to each guide rail, and the open ends of the U-shaped frame are rotatably connected to both circumferential sides of the cylindrical body of the guide rail to form a rotation position, and the closed ends of the U-shaped frame rotate up and down around the rotation position. A first sliding groove is formed at the lower end of each guide block, and a locking member is accommodated in the first sliding groove, which is arranged in order from bottom to top along the first sliding groove and is movable between an initial position, a locked position, and an unlocked position. The locking member is connected to the top wall of the first sliding groove via a pre-compressed first elastic member, and the bottom of the locking member extends outward from the first sliding groove. The bottom of the locking member has a locking position and a transition position which are connected in order from inside to outside, the locking position being an upward convex arc surface, and the transition position being a downward concave arc surface. Provided is a sewage treatment cylinder for use in a method for constructing sewage treatment facilities, in which an upper-layer sewage treatment cylinder is stacked on top of a lower-layer sewage treatment cylinder, the guide blocks of the lower-layer sewage treatment cylinder are inserted into the guide rails of the upper-layer sewage treatment cylinder, the closed end of the U-shaped frame rotates downward until it contacts a transition position and then rotates further downward, the locking member moves from an initial position to an unlocked position due to the pressure action of the closed end of the U-shaped frame, the closed end of the U-shaped frame rotates past the transition position to a locked position, and the locking member moves from the unlocked position to the locked position due to the action of an elastic force of a first elastic member.

[0016] Optionally, the guide rail includes a first guide rail portion and a second guide rail portion connected in order from bottom to top, the guide block includes a first guide block portion and a second guide block portion connected in order from bottom to top, the first guide rail portion being narrow at the top and wide at the bottom and having the same shape as the narrow portion of an ellipse, the first guide rail portion being connected to the second guide rail portion along the circumferential center of the cylinder, the first guide block portion being narrow at the top and wide at the bottom, the second guide block portion being elongated, and the second guide rail portion being shaped to match the shape of the second guide block portion. [Effects of the Invention]

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The proposed sewage treatment system uses a three-dimensional construction method, thereby reducing construction land area and improving horizontal space utilization. Furthermore, the process platform can be assembled and fixed modularly, making subsequent expansion of the process platform more convenient and rapid, and subsequent construction more standardized, improving construction efficiency. 2. The proposed sewage treatment cylinder is equipped with guide rails and guide blocks, which facilitates guiding and positioning the upper and lower sewage treatment cylinders when stacking them on the lower one, making installation more efficient. Furthermore, the cooperation of the U-shaped frame and locking member stabilizes the installation between the upper and lower sewage treatment cylinders, applies prestress between the upper and lower sewage treatment cylinders, and ensures the sealing effect of the sealing ring in the space within the cylinders. By providing a locking position and a transition position at the bottom of the locking member, the closed end of the U-shaped frame can be moved past the transition position to the locking position, while the transition position serves to block the U-shaped frame from being in the locking position, preventing the U-shaped frame from moving out of the locking position.

[0019] The drawings are included to provide a further understanding of the invention, constitute a part of this specification, and together with the following specific examples serve to explain, but not to limit, the invention. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a structural schematic diagram of a wastewater treatment system according to an embodiment of the present invention. [Figure 2] 1 is a structural schematic diagram of a first-layer process platform according to an embodiment of the present invention; [Figure 3] FIG. 2 is a structural schematic diagram of a second-layer process platform according to an embodiment of the present invention; [Figure 4] FIG. 2 is a structural schematic diagram of a third-layer process platform according to an embodiment of the present invention; [Figure 5] FIG. 2 is a structural schematic diagram of a fourth-layer process platform according to an embodiment of the present invention. [Figure 6] FIG. 2 is a structural schematic diagram of a base layer according to an embodiment of the present invention. [Figure 7] FIG. 2 is a schematic diagram of the cooperation between the upper and lower sewage treatment cylinders according to an embodiment of the present invention; [Figure 8] 10 is a schematic cross-sectional view of a guide block in which a locking member is in an initial position according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] For better explanation and easier understanding of the present invention, the present invention will be described in detail below by specific examples with reference to the drawings. Directional nouns such as "upper" and "lower" referred to herein refer to the directions in FIG. 1, and "inner" and "outer" are defined relative to the actual contours of the corresponding parts. [Example]

[0022] This embodiment provides a wastewater treatment system, which, as shown in Figure 1, includes a base layer 100 and a cylindrical wastewater treatment pond 200 mounted on the base layer 100. The wastewater treatment pond 200 includes a first treatment space surrounded by a side wall, and the first treatment space includes three partitions, namely, an anaerobic zone 221, an anoxic zone 222, and an aerobic zone 223, which are adjacent to each other in sequence. Each partition penetrates vertically from the top to the bottom of the wastewater treatment pond 200, and adjacent two partitions are connected to each other in sequence. As a result, wastewater in the wastewater treatment pond 200 flows through the anaerobic zone 221, the anoxic zone 222, and the aerobic zone 223 in sequence along a vertical serpentine path. Above the foundation layer 100, multiple layers of process platforms arranged in order from top to bottom are constructed surrounding the wastewater treatment pond 200, and the process platforms are used to mount secondary sedimentation equipment 31 for treating wastewater discharged from the wastewater treatment pond 200, advanced treatment equipment 32, and power distribution equipment 33 for operating and maintaining the wastewater treatment pond 200.

[0023] The wastewater treatment system thus constructed employs a three-dimensional construction form, thereby reducing the construction site and improving the utilization rate of horizontal space. In addition, the process platform can be assembled and fixed in a modular manner, which makes subsequent expansion of the process platform more convenient and quick, and subsequent construction more standardized, improving construction efficiency.

[0024] The partitions may be separated by inserting metal plates into the sewage treatment pond 200, or an independent cylinder may be provided for each partition, and multiple independent cylinders may be integrated to form the sewage treatment pond 200.

[0025] As shown in FIGS. 1 to 3 , the multi-level process platform preferably includes a first process platform 101 located at the top and a second process platform 102 located below and directly adjacent to the first process platform 101. The first process platform 101 is equipped with a plurality of secondary sedimentation facilities 31 surrounding a wastewater treatment pond 200, and the second process platform 102 is equipped with a plurality of advanced treatment facilities 32 surrounding the wastewater treatment pond 200. The secondary sedimentation facilities 31 are connected to the wastewater outlet of the wastewater treatment pond 200, and the advanced treatment facilities 32 are connected to the purified water outlet of the secondary sedimentation facilities 31. This configuration results in a compact structure, a reduced footprint, and mass production of the secondary sedimentation facilities 31 and the advanced treatment facilities 32 is possible, improving production efficiency. Furthermore, utilizing the elevation facilitates the purified water in the secondary sedimentation facilities 31 to flow easily to the advanced treatment facilities 32. Specifically, the secondary sedimentation equipment 31 is used to settle the wastewater discharged from the wastewater treatment pond 200 to obtain sludge and purified water, and then discharge the sludge into the sludge pond, while the advanced treatment equipment 32 is used to subject the purified water discharged from the secondary sedimentation equipment 31 to coagulation, sedimentation, and filtration processes, and then discharge the treated purified water into the purified water pond.

[0026] More preferably, in this embodiment, as shown in FIG. 4, four process platforms, namely, first process platform 101, second process platform 102, third process platform 103, and fourth process platform 104, arranged from top to bottom above the foundation layer 100, are constructed surrounding the wastewater treatment pond 200, and the third process platform 103 is equipped with power distribution equipment 33 for operating and maintaining the wastewater treatment pond 200. In the wastewater treatment system of this embodiment, the foundation layer is generally underground and all process platforms are above ground. Therefore, as shown in FIG. 5, the fourth process platform 104 is not equipped with any equipment and may be used solely as an exhibition hall.

[0027] Furthermore, in this embodiment, as shown in Figure 4, the third-level process platform 103 is further equipped with an agitation system 34 and a fan system 35. The agitation system 34 agitates the wastewater in the wastewater treatment pond 200 by circulating gas into the wastewater treatment pond 200, and the fan is used to aerate the aerobic zone in the wastewater treatment pond 200. This configuration results in a compact structure and makes full use of the space of the process platform.

[0028] 6, the base layer 100 is equipped with a solid-liquid separator 36, a central pressure pump station 37, a sludge dewatering machine 38, a packing machine 39, and an emergency wastewater discharge device 40. The solid-liquid separator 36 is used to roughly filter the wastewater from the central pressure pump station 37, and the central pressure pump station 37 is used to send the roughly filtered wastewater from the top of the wastewater treatment pond 200 back into the sewage treatment pond 200. The sludge dewatering machine 38 is used to dewater the sludge in the sludge pond. The packing machine 39 is used to pack the dewatered sludge into sludge bricks. The emergency wastewater discharge device 40 is used to discharge wastewater leaked into the base layer 100 in the event of a leak from the sewage treatment pond 200.

[0029] Preferably, the partitions are formed around the axis of the sewage treatment pond 200, and each partition is a sector with its apex on the axis of the sewage treatment pond 200. Here, the sector may have shapes such as a minor arc, a major arc, and a semicircle.

[0030] Adjacent partitions must be connected to each other. This can be achieved by opening water holes in the top and bottom walls of the partitions, each corresponding to the partition's location, and connecting the holes to the water holes via a conduit. The conduit may be equipped with a pump to control the direction of the water flow. Alternatively, water may be passed through the water holes directly by pressure without using a conduit, as will be described in more detail in the following examples.

[0031] More preferably, in this embodiment, the volume of the aerobic zone 223 is larger than the volume of the anoxic zone 222, which in turn is larger than the volume of the anaerobic zone 221. Furthermore, the volumes of the anaerobic zone 221, the anoxic zone 222, and the aerobic zone 223 are directly proportional to the predetermined residence time of the wastewater in the corresponding zones. For example, in this embodiment of the present disclosure, the wastewater may reside in the anaerobic zone 221 for 2 hours, in the anoxic zone 222 for 4 hours, and in the aerobic zone 223 for 10 hours. That is, in this case, the volume ratio of the anaerobic zone 221:the anoxic zone 222:the aerobic zone 223 is 1:2:5. The residence time of the wastewater in each zone is not limited to the above data and may be adjusted between 2 and 15 hours according to actual needs, but is not limited in this disclosure.

[0032] Preferably, the sewage treatment tank 200 further includes an outer peripheral wall surrounding the side wall at a distance, the side wall and the outer peripheral wall forming an installation space 23. A vertically extending core tube 21 is provided on the central axis of the first treatment space, and multiple partitions are provided surrounding the core tube 21, dividing the interior of the core tube 21 into three closed areas arranged from top to bottom, which respectively function as a fire water tank, a clean water tank, and a sludge tank. Pipes connecting the sewage treatment tank 200 to the sewage treatment equipment may be provided within the installation space 23, and meters for various detection devices may be installed in the installation space 23, but this is not limited to this. By dividing the core tube 21 into a fire water tank, a clean water tank, and a sludge tank, the footprint of the sewage treatment system can be further reduced.

[0033] Preferably, the anaerobic zone 221, the anoxic zone 222, and the aerobic zone 223 each have at least one sub-zone, each of which is fan-shaped with its apex on the axis of the sewage treatment pond 200 and has the same volume, with the water flow direction being opposite between two adjacent sub-zones. That is, a water passage hole connecting one adjacent sub-zone to the bottom end of the sewage treatment pond 200 closest to the bottom, and a communication hole connecting another adjacent sub-zone to the top end of the sewage treatment pond 200 closest to the top. When it is necessary to stack one layer of sewage treatment pond 200 upward, the water passage hole formed at the top end of the original uppermost sewage treatment pond 200 is closed, and then a water passage hole is opened at a position corresponding to the top end of the new uppermost sewage treatment pond 200.

[0034] Preferably, the water inlet is located at the top of the anaerobic zone 221 and the water outlet is located at the top of the aerobic zone 223 to take advantage of the hydraulic elevation. [Example]

[0035] This embodiment provides a method for constructing a wastewater treatment system, which includes the steps of first constructing a foundation layer 100, then installing one wastewater treatment cylinder 2 on top of the foundation layer 100, or installing at least two wastewater treatment cylinders 2 stacked in order from bottom to top, to form a wastewater treatment pond 200, in which the wastewater treatment cylinder 2 includes a second treatment space 22 surrounded by a side wall, the inside of the second treatment space 22 is divided into a plurality of partitions with different treatment functions, each partition vertically penetrates from the top to the bottom of the wastewater treatment cylinder 2, and in adjacent wastewater treatment cylinders 2, the partitions with the same function are connected to each other, and finally constructing a process platform around the outer periphery of the wastewater treatment pond 200.

[0036] Based on the above technical solution, multiple sewage treatment cylinders 2 are stacked vertically upward on the foundation layer 100, thereby making full use of the vertical space and adopting a three-dimensional construction form, thereby reducing the construction land required and improving the horizontal space utilization rate. In addition, both the process platform and the sewage treatment cylinders 2 can be assembled and fixed in a modular manner, making subsequent stacking of the sewage treatment cylinders 2 and expansion of the process platform more convenient and quicker, making subsequent construction more standardized and improving construction efficiency.

[0037] Preferably, the construction method further includes the step of connecting two adjacent partitions in the sewage treatment pond 200 in sequence, so that the water flow in the sewage treatment pond 200 flows vertically in a snake-like pattern.

[0038] Specifically, each sewage treatment cylinder 2 includes a side wall, and each sewage treatment cylinder 2 is cylindrical, surrounded by the side wall, and open at both the top and bottom ends. The construction method further includes the steps of mounting the lowest sewage treatment cylinder 2 on a seal plate, sealing the bottom opening of the lowest sewage treatment cylinder 2 with the seal plate, and then stacking the sewage treatment cylinders 2 upward in order above the lowest sewage treatment cylinder 2.

[0039] Preferably, the construction method further includes a step of first reinforcing the lowest sewage treatment cylinder 2 before stacking one upper sewage treatment cylinder 2 on top of one lower sewage treatment cylinder 2, so that the forces received by the treatment cylinders 2 meet the overall structural requirements and improve the structural strength of the entire sewage treatment equipment. Also, to further improve the structural strength of the entire sewage treatment equipment, each lower sewage treatment cylinder 2 can be reinforced before stacking the upper sewage treatment cylinders 2, but the present invention is not limited thereto. [Example]

[0040] In the sewage treatment pond 200 constructed in Example 2, it is necessary to apply a sealing treatment to the connection portion of the two sewage treatment cylinders 2 in order to prevent leakage of sewage within the sewage treatment pond 200. In this Example, it is proposed to connect two adjacent sewage treatment cylinders 2 by sealing them with a seal ring. In order to facilitate connecting adjacent sewage treatment cylinders 2 by sealing them with a seal ring, this Example proposes a structure of the sewage treatment cylinders 2.

[0041] 7 and 8, the wastewater treatment cylinder according to this embodiment includes a cylinder having both upper and lower open ends, a plurality of guide rails 24 extending in the vertical direction are evenly provided at the lower end of the outer wall of the cylinder along the circumferential direction of the cylinder, and a plurality of guide blocks 25 are provided at the upper end of the outer wall of the cylinder corresponding to the plurality of guide rails 24. A U-shaped frame 26 is connected to each guide rail 24, and the open ends of the U-shaped frame 26 are rotatably connected to both sides of the guide rails 24 in the circumferential direction of the cylinder to form a rotation position, and the closed end of the U-shaped frame 26 rotates in the vertical direction around the rotation position. A first slide groove 251 is formed at the lower end of each guide block 25, and an initial position, a lock position 254, and an unlock position are arranged in the first slide groove 251 in order from bottom to top along the first slide groove 251. The locking member 252 is connected to the top wall of the first slide groove 251 via a first elastic member 253 that is compressed in advance, and the bottom of the locking member 252 extends outward from the first slide groove 251. At the bottom of the locking member 252, there are a locking position 254 and a transition position 255 that are connected in this order from the inside (inside the cylinder) to the outside (outside the cylinder), and the locking position 254 is an upwardly convex arc surface, and the transition position 255 is a downwardly concave arc surface.

[0042] The upper layer sewage treatment cylinder is stacked on top of the lower layer sewage treatment cylinder, the guide block 25 of the lower layer sewage treatment cylinder is inserted into the guide rail 24 of the upper layer sewage treatment cylinder, the closed end of the U-shaped frame 26 rotates downward until it contacts the transition position 255, and then rotates further downward, the locking member 252 moves from the initial position to the unlocked position due to the pressure action of the closed end of the U-shaped frame 26, the closed end of the U-shaped frame 26 rotates beyond the transition position 255 to the locked position 254, and the locking member 252 moves from the unlocked position to the locked position 254 due to the action of the elastic force of the first elastic member 253.

[0043] The provision of the guide rails 24 and guide blocks 25 facilitates guiding and positioning of the upper and lower sewage treatment cylinders when stacking them on the lower one, resulting in efficient installation. The cooperation of the U-shaped frame 26 and the locking member 252 stabilizes the installation between the upper and lower sewage treatment cylinders, applies prestress between the upper and lower sewage treatment cylinders, and ensures the sealing effect of the seal ring in the space within the cylinders. The locking member 252 has a locking position 254 and a transitional position 255 at its bottom, allowing the closed end of the U-shaped frame 26 to move beyond the transitional position 255 to the locking position 254, while the transitional position 255 prevents the U-shaped frame 26 from being positioned at the locking position 254, preventing the U-shaped frame 26 from moving away from the locking position 254.

[0044] Preferably, the guide rail 24 includes a first guide rail portion 241 and a second guide rail portion 242 connected in order from bottom to top, the guide block 25 includes a first guide block portion 256 and a second guide block portion 257 connected in order from bottom to top, the first guide rail portion 241 is narrow at the top and wide at the bottom and has the same shape as the narrow part of an ellipse, the first guide rail portion 241 is connected to the second guide rail portion 242 along the circumferential center of the cylinder, the first guide block portion 256 is narrow at the top and wide at the bottom, the second guide block portion 257 is elongated, and the second guide rail portion 242 is shaped to match the shape of the second guide block portion 257. In this way, the engagement between the first guide rail portion 241 and the first guide block portion 256 facilitates the installation and initial positioning of the upper and lower sewage treatment cylinders, and makes it easy to quickly insert the first guide block portion 256 into the first guide rail portion 241 (i.e., quickly insert the guide block 25 into the guide rail 24). In the process of inserting the first guide block portion 256 into the first guide rail portion 241, the first guide block portion 256 is self-guided along the first guide rail portion 241 and inserted into the second guide rail portion 242, and when the second guide block portion 257 is inserted into the second guide rail portion 242, the upper and lower sewage treatment cylinders are positioned and installed with high precision.

[0045] Specifically, in this embodiment, the first guide block portion 256 is triangular.

[0046] Specifically, in this embodiment, the U-shaped frame 26 includes a wide portion and a narrow portion connected in order, the wide portion being the closed end of the U-shaped frame 26, the narrow portion being the open end of the U-shaped frame 26, the narrow portion being rotatably connected to both sides of the circumferential direction of the cylindrical body of the second guide rail portion 242 to form a rotated position, and the wide portion being able to rotate downward around the rotated position and thereby enclose the first guide rail portion 241 within the wide portion. In this way, interference between the rotating U-shaped frame 26 and the first guide rail portion 241 is avoided, and engagement between the U-shaped frame 26 and the locking member 252 is ensured.

[0047] In actual use, the sewage treatment cylinder has a large volume and typically has a radius of 8 m or more. In this embodiment, a large stiffness coefficient is required for the first elastic member 253 to ensure a sealing effect between the upper and lower sewage treatment cylinders. The larger the stiffness coefficient of the first elastic member 253, the less likely it is that a construction worker will manually intervene and deform the first elastic member 253. The stiffness coefficient of the first elastic member 253 is reduced so that construction workers can rotate the U-shaped frame 26 to cooperate with the locking member 252. In this embodiment, five or more guide rails 24 are provided at the lower end of the outer wall of the cylinder, evenly spaced along the circumferential direction of the cylinder, and five or more guide blocks 25 are provided at the upper end of the outer wall of the cylinder. The radius of curvature of the transition position 255 is set to 50 to 100 mm.

[0048] However, if the curvature radius of the transition position 255 is set to 50 to 100 mm, the degree of bending at the transition position 255 decreases. As the service life of the sewage treatment pond increases, the engagement between the U-shaped frame 26 and the locking member 252 becomes loose, and the U-shaped frame 26 is likely to move beyond the transition position 255 and disengage from the locking position 254 due to the action of an uncontrollable external force. Therefore, a second slide groove 258 is formed at the lower end of the locking member 252. A stop member 259 that can move up and down along the second slide groove 258 can be housed within the second slide groove 258. The stop member 259 is connected to the top wall of the second slide groove 258 via a pre-compressed second elastic member 260, and the stop member 259 extends downward outward from the second slide groove 258. The stop member 259 is located on the side of the transition position 255 that is away from the cylinder body, and the stop member 259 extends downward outward from the transition position 255. In this way, the provision of the stop member 259 further prevents the closed end of the U-shaped frame 26 from disengaging from the locking member 252, ensuring the sealing effect of the seal ring. Furthermore, when removing the U-shaped frame 26, the stop member 259 is pushed upward to move it above the transition position 255, and the U-shaped frame 26 is then rotated to disengage from the locking position 254, making removal easy. Because the engagement between the stop member 259 and the second elastic member 260 only provides a blocking effect on the U-shaped frame 26, the second elastic member 260 is required to have a low stiffness coefficient, which must be lower than the stiffness coefficient of the first elastic member 253. The stiffness coefficient of the second elastic member 260 may be set to be suitable for manual pressure.

[0049] More preferably, the bottom of the stop member 259 has an upwardly extending arcuate surface. In this manner, the U-shaped frame 26 can easily pass over the stop member 259 when disengaging from the lock member 252.

[0050] It should be noted that the above description of the specific embodiments of the present invention is only for the purpose of explaining the technical path and characteristics of the present invention, and is intended to enable those skilled in the art to understand and practice the contents of the present invention, but the present invention is not limited to the above specific embodiments. Various changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention. [Explanation of symbols]

[0051] 100 base layer 101 First-layer process platform 102 Second-tier process platform 103 Third-tier process platform 104 Fourth Layer Process Platform 200 Sewage treatment pond 2 Sewage treatment cylinder 21 core tube 22 second processing space 221 Anaerobic Zone 222 Anoxic Zone 223 Aerobic Zone 23 Installation Space 24 Guide rail 25 Guide block 26 U-shaped frame 241 First guide rail section 242 Second guide rail portion 251 First slide groove 252 locking member 253 first elastic member 255 transition position 254 Lock position 255 Transition position 256 First guide block part 257 Second guide block part 258 Second slide groove 259 Stop member 260 Second elastic member 31 Secondary sedimentation facility 32 Advanced treatment facility 33 Power distribution equipment 34 Mixing equipment 35 Fan equipment 36 Solid-liquid separator 37 Central pressure pump station 38 Sludge dewatering machine 39 Packing machine 40 Emergency wastewater discharge device

Claims

1. 1. A wastewater treatment system comprising: A foundation layer (100) and a cylindrical sewage treatment pond (200) mounted on the foundation layer (100), The sewage treatment pond (200) includes a first treatment space surrounded by a side wall, and the inside of the first treatment space includes three partitions, which are adjacent to each other in order, namely, an anaerobic zone (221), an anoxic zone (222), and an aerobic zone (223), and each partition penetrates vertically from the top to the bottom of the sewage treatment pond (200), and two adjacent partitions are connected near the top or near the bottom, so that the sewage in the sewage treatment pond (200) flows down one partition and up the other adjacent partition, and flows sequentially through the anaerobic zone (221), the anoxic zone (222), and the aerobic zone (223), while repeating this flow. Above the foundation layer (100), a plurality of process platforms arranged in order from top to bottom are constructed surrounding the wastewater treatment pond (200), and the process platforms are used to mount a secondary sedimentation facility (31) for treating wastewater discharged from the wastewater treatment pond (200), an advanced treatment facility (32), and a power distribution facility (33) for operating and maintaining the wastewater treatment pond (200); Partitioning the first treatment space around the axis of the sewage treatment pond (200), each partition being a fan shape with its apex on the axis of the sewage treatment pond (200); The sewage treatment tank (200) further includes an outer peripheral wall surrounding the side wall at a distance, the side wall and the outer peripheral wall forming an installation space (23), a vertically extending core tube (21) is provided on the central axis of the first treatment space, a plurality of partitions are provided surrounding the core tube (21), and the interior of the core tube (21) is divided into three closed areas arranged from top to bottom, which respectively function as a fire water tank, a clean water tank, and a sludge tank, characterized in that

2. 2. The wastewater treatment system of claim 1, wherein the multiple process platforms include a first process platform (101) located at the top and a second process platform (102) located below the first process platform (101) and directly adjacent to the first process platform (101), wherein the first process platform (101) is equipped with a plurality of secondary sedimentation facilities (31) surrounding the wastewater treatment pond (200), and the second process platform (102) is equipped with a plurality of advanced treatment facilities (32) surrounding the wastewater treatment pond (200), wherein the secondary sedimentation facilities (31) are connected to a wastewater outlet of the wastewater treatment pond (200), and the advanced treatment facilities (32) are connected to a purified water outlet of the secondary sedimentation facilities (31).

3. The wastewater treatment system according to claim 2, characterized in that four process platforms, namely a first process platform (101), a second process platform (102), a third process platform (103), and a fourth process platform (104), arranged in order from top to bottom, are constructed above the base layer (100) surrounding the wastewater treatment pond (200), and the third process platform (103) is equipped with power distribution equipment (33) for maintaining the operation of the wastewater treatment pond (200).

4. The base layer (100) is equipped with a solid-liquid separator (36), a central pressure pump station (37), a sludge dewatering machine (38), a packing machine (39), and an emergency wastewater discharge device (40).

2. The wastewater treatment system according to claim 1, wherein the solid-liquid separator (36) is used for roughly filtering the wastewater in the central pressure pump station (37), the central pressure pump station (37) is used for sending the roughly filtered wastewater from the top of the wastewater treatment pond (200) into the wastewater treatment pond (200), the sludge dewatering machine (38) is used for dewatering the sludge in the sludge pond, the packing machine (39) is used for compressing the dewatered sludge into bricks, and the emergency wastewater discharge device (40) is used for discharging the wastewater leaked into the base layer (100) in the event of a leak from the wastewater treatment pond (200).

5. The anaerobic zone (221), the anoxic zone (222), and the aerobic zone (223) each have at least one sub-region, each of which is a sector whose apex is on the axis of the sewage treatment pond (200) and which all have the same volume; The wastewater treatment system according to claim 1, characterized in that the sub-zones have a water passage hole formed at the bottom end of the wastewater treatment cylinder (2) to connect with one adjacent sub-zone, and a communication portion with another adjacent sub-zone is formed at the top end of the wastewater treatment cylinder (2).

Images