Sewage treatment system, construction method of sewage treatment system, and sewage treatment cylindrical body

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 sewage treatment, and particularly to a sewage treatment system, a construction method of the sewage treatment system, and a sewage treatment cylinder.

Background Art

[0002] Existing sewage treatment means mainly include constructed wetland treatment technology, stabilization pond treatment technology, domestic sewage biogas pond technology, and biological membrane treatment technology. The existing technologies at the current stage all have certain defects. For example, constructed wetland technology and stabilization pond technology have a large occupied area and are greatly affected by the climate. Biogas pond technology cannot fully treat sewage, and the content of pollutants in the discharged water is still high. Biological membrane technology is too costly and is prone to clogging during long-term operation. However, sewage treatment technology using tanks and cylindrical equipment is still in its initial stage, the technology of the treatment process is lagging behind, the sewage reuse rate is low, and there are also problems such as a large occupied area, limited available land, and difficulty in renovation and expansion.

Summary of the Invention

Problems to be Solved by the Invention

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

[0004] The second object of the present invention is to propose a construction method of the above sewage treatment system.

[0005] The third object of the present invention is to propose a sewage treatment cylinder that is easy to seal and connect adjacent sewage treatment cylinders with a sealing ring.

Means for Solving the Problems

[0006] To achieve the above object, the main technical solutions adopted by the present invention include the following.

[0007] In a first aspect, the present invention 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 side walls. The interior of the first treatment space includes 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 communicate with each other in order. Thereby, the sewage in the sewage treatment tank flows along a vertical meandering path through the anaerobic zone, the anoxic zone, and the aerobic zone in order. 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 platform is used to carry a secondary sedimentation facility for treating the sewage discharged from the sewage treatment tank, an advanced treatment facility, and a power distribution facility for the operation and maintenance of the sewage treatment tank, and provides a sewage treatment system.

[0008] Optionally, the plurality of layers of process platforms include a first-layer process platform located at the uppermost position, and a second-layer process platform located below the first-layer process platform and provided immediately adjacent to the first-layer process platform. The first-layer process platform is equipped with a plurality of secondary sedimentation facilities provided surrounding the sewage treatment tank. The second-layer process platform is equipped with a plurality of advanced treatment facilities provided surrounding the sewage treatment tank. The secondary sedimentation facility communicates with the sewage discharge port of the sewage treatment tank, and the advanced treatment facility communicates with the purified water outlet of the secondary sedimentation facility.

[0009] Optionally, above the base layer, four process platforms, namely the first-layer process platform, the second-layer process platform, the third-layer process platform, and the fourth-layer process platform, are arranged in order from top to bottom to surround the sewage treatment pool. The third-layer process platform is equipped with power distribution facilities for the operation and maintenance of the sewage treatment pool.

[0010] Optionally, the base layer is equipped with a solid-liquid separation device, a central pressurized pump station, a sludge dewatering machine, a packing machine, and an emergency sewage discharge device. The solid-liquid separation device is used to roughly filter the sewage of the central pressurized pump station. The central pressurized pump station is used to send the roughly filtered sewage into the sewage treatment pool from the top of the sewage treatment pool. The sludge dewatering machine is used to dewater the sludge in the sludge pool. The packing machine is used to pack the dewatered sludge into sludge bricks. The emergency sewage discharge device is used to discharge the sewage leaked to the base layer when a leak occurs in the sewage treatment pool.

[0011] Optionally, a partition of the first treatment space is made surrounding the axis of the sewage treatment pool, and each partition is a sector with its vertex on the axis of the sewage treatment pool.

[0012] Optionally, the sewage treatment pool further includes an outer peripheral wall surrounding the side wall at intervals. The side wall and the outer peripheral wall constitute an installation space. A core cylinder extending vertically is provided on the central axis of the first treatment space. The plurality of partitions are provided surrounding the core cylinder. The inside of the core cylinder is divided into three closed areas arranged in order from top to bottom, which function as a fire water pool, a clean water pool, and a sludge pool respectively.

[0013] Optionally, the anaerobic zone, anoxic zone, and aerobic zone each have at least one sub-region, each sub-region is a sector with its apex on the axis of the sewage treatment tank, and all have the same volume. The sub-regions have water passage holes with an adjacent sub-region formed at the bottom end of the sewage treatment cylinder body, and communication parts with another adjacent sub-region formed at the top end of the sewage treatment cylinder body.

[0014] In a second aspect, the present invention includes the step of constructing a base layer, and the step of installing one sewage treatment cylinder body above the base layer or stacking and installing at least two sewage treatment cylinder bodies in order from bottom to top to form a sewage treatment tank. The sewage treatment cylinder body includes a second treatment space surrounded by a side wall, and the interior 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 body, and in adjacent sewage treatment cylinder bodies, the partitions with the same function communicate with each other. It provides a method for constructing a sewage treatment system including the step of constructing a process platform on the outer periphery of the sewage treatment tank.

[0015] In a third aspect, the present invention includes a cylinder body surrounded by a side wall and having openings at both the upper end and the lower end. A plurality of guide rails extending in the vertical direction are evenly provided along the circumferential direction of the cylinder body at the lower end of the outer wall of the cylinder body, and a plurality of guide blocks are provided corresponding to the plurality of guide rails at the upper end of the outer wall of the cylinder body. A U-shaped frame is connected to each guide rail. The open end of the U-shaped frame is rotatably connected to both sides in the circumferential direction of the cylindrical body of the guide rail to form a rotational position. The closed end of the U-shaped frame rotates vertically around the rotational position. A first slide groove is formed at the lower end of each guide block. Inside the first slide groove, a locking member that can move between an initial position, a locked position, and an unlocked position, and is arranged in sequence from bottom to top along the first slide groove, can be accommodated. The locking member is connected to the top wall of the first slide groove via a pre-compressed first elastic member. The bottom of the locking member extends outward from the first slide groove. There are a locked position and a transition position connected in sequence from inside to outside at the bottom of the locking member. The locked position is an upward convex arc surface, and the transition position is a downward concave arc surface. An upper-layer sewage treatment cylindrical body is laminated on a lower-layer sewage treatment cylindrical body. The guide block of the lower-layer sewage treatment cylindrical body is inserted into the guide rail of the upper-layer sewage treatment cylindrical body. The closed end of the U-shaped frame rotates downward until it contacts the transition position, and then rotates further downward. The locking member moves from the initial position to the unlocked position under the pressure action of the closed end of the U-shaped frame. The closed end of the U-shaped frame rotates from the transition position beyond to the locked position. The locking member moves from the unlocked position to the locked position under the elastic force action of the first elastic member. Provided is a sewage treatment cylindrical body used in a construction method of a sewage treatment facility.

[0016] Optionally, the guide rail includes a first guide rail portion and a second guide rail portion connected in sequence from bottom to top. The guide block includes a first guide block portion and a second guide block portion connected in sequence from bottom to top. The first guide rail portion has a narrow upper part and a wide lower part, and has the same shape as the narrow part of an ellipse. The first guide rail portion is connected to the second guide rail portion along the central part in the circumferential direction of the cylindrical body. The first guide block portion has a narrow upper part and a wide lower part. The second guide block portion is elongate. The second guide rail portion is provided in a shape matching the shape of the second guide block portion.

Advantages of the Invention

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

[0018] 1. The sewage treatment system proposed by the present invention adopts a three-dimensional construction form, thereby reducing the construction land and improving the space utilization rate of the horizontal plane. In addition, since the process platform can be assembled and fixed in a modular manner, the subsequent expansion of the process platform becomes more convenient and rapid, the subsequent construction becomes more standardized, and the construction efficiency is improved. 2. In the sewage treatment cylinder proposed by the present invention, by providing a guide rail and a guide block, when stacking the upper-layer sewage treatment cylinder on the lower-layer sewage treatment cylinder, it is easy to guide and position the upper and lower sewage treatment cylinders, and the installation becomes efficient. In addition, through the cooperation of the U-shaped frame and the locking member, the installation between the upper and lower sewage treatment cylinders is stable, prestress is applied between the upper and lower sewage treatment cylinders, and the sealing effect of the sealing ring on the space inside the cylinder is ensured. By setting the locking position and the transition position at the bottom of the locking member, while enabling the closed end of the U-shaped frame to move from the transition position to the locking position, the transition position plays a role in preventing the U-shaped frame located at the locking position, and it is also possible to avoid the U-shaped frame from disengaging from the locking position.

[0019] The drawings are provided for a further understanding of the present invention, form a part of this specification, and are used to explain the present invention together with the following specific embodiments, but do not limit the present invention.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0021] To better explain and facilitate the understanding of the present invention, the present invention will be described in detail below with reference to the drawings and specific embodiments. The orientation nouns such as "upper" and "lower" mentioned here refer to the orientation in FIG. 1, and "inner" and "outer" are defined with respect to the actual contour of the corresponding parts.

Embodiment

[0022] This embodiment provides a sewage treatment system. As shown in FIG. 1, this sewage treatment system includes a base layer 100 and a cylindrical sewage treatment tank 200 mounted on the base layer 100. The sewage treatment tank 200 includes a first treatment space surrounded by side walls, and the interior of the first treatment space includes three adjacent partitions in sequence: an anaerobic zone 221, an anoxic zone 222, and an aerobic zone 223. Each partition vertically penetrates from the top to the bottom of the sewage treatment tank 200, and two adjacent partitions communicate in sequence. Thereby, the sewage in the sewage treatment tank 200 flows through the anaerobic zone 221, the anoxic zone 222, and the aerobic zone 223 in sequence along a vertical meandering path. Above the base layer 100, a plurality of layers of process platforms arranged in sequence from top to bottom are constructed surrounding the sewage treatment tank 200, and the process platforms are used to carry a secondary sedimentation facility 31 for treating the sewage discharged from the sewage treatment tank 200, an advanced treatment facility 32, and a power distribution facility 33 for the operation and maintenance of the sewage treatment tank 200.

[0023] The sewage treatment system provided in this way adopts a three-dimensional construction form, thereby reducing the construction land and improving the space utilization rate of the horizontal plane. In addition, since the process platform can be assembled and fixed in a modular manner, the subsequent expansion of the process platform becomes more convenient and rapid, the subsequent construction becomes more standardized, and the construction efficiency is improved.

[0024] Note that as a form of partitioning, a metal plate may be inserted into the sewage treatment tank 200 for partitioning, or an independent cylindrical body may be provided for each partition, and a plurality of independent cylindrical bodies may be integrated to jointly form the sewage treatment tank 200.

[0025] Preferably, as shown in FIGS. 1 to 3, the multi-layer process platform includes a first-layer process platform 101 located at the uppermost layer, and a second-layer process platform 102 located below the first-layer process platform 101 and provided directly adjacent to the first-layer process platform 101. A plurality of secondary sedimentation facilities 31 provided surrounding the sewage treatment tank 200 are mounted on the first-layer process platform 101, and a plurality of advanced treatment facilities 32 provided surrounding the sewage treatment tank 200 are mounted on the second-layer process platform 102. The secondary sedimentation facility 31 communicates with the sewage discharge port of the sewage treatment tank 200, and the advanced treatment facility 32 communicates with the purified water outlet of the secondary sedimentation facility 31. With such a configuration, the structure becomes compact, the occupied area is reduced, mass production of the secondary sedimentation facility 31 and the advanced treatment facility 32 becomes possible, and the production efficiency is improved. Furthermore, by utilizing the elevation, the purified water in the secondary sedimentation facility 31 easily flows into the advanced treatment facility 32. Specifically, the secondary sedimentation facility 31 is used to precipitate the sewage discharged from the sewage treatment tank 200 to obtain sludge and purified water, and discharge the sludge into the sludge tank. The advanced treatment facility 32 is used to perform coagulation, sedimentation, and filtration on the purified water discharged from the secondary sedimentation facility 31 and discharge the treated purified water into the purified water tank.

[0026] More preferably, in this embodiment, as shown in FIG. 4, above the base layer 100, four process platforms, namely the first-layer process platform 101, the second-layer process platform 102, the third-layer process platform 103, and the fourth-layer process platform 104, are arranged in order from top to bottom and constructed surrounding the sewage treatment tank 200. On the third-layer process platform 103, power distribution equipment 33 for the operation and maintenance of the sewage treatment tank 200 is installed. In the sewage treatment system according to this embodiment, generally, the base layer is underground and all the process platforms are above the ground. Therefore, as shown in FIG. 5, the fourth-layer process platform 104 is not equipped with equipment and may be used only as an exhibition hall.

[0027] Furthermore, in this embodiment, as shown in FIG. 4, the third-layer process platform 103 is further equipped with stirring equipment 34 and fan equipment 35. The stirring equipment 34 stirs the sewage in the sewage treatment tank 200 by circulating and introducing gas into the sewage treatment tank 200, and the fan is used to aerate the aerobic zone in the sewage treatment tank 200. With such a configuration, the structure becomes compact and the space of the process platform is fully utilized.

[0028] Furthermore, in this embodiment, as shown in FIG. 6, the base layer 100 is equipped with a solid-liquid separation device 36, a central pressurized pump station 37, a sludge dewatering machine 38, a packing machine 39, and an emergency sewage discharge device 40. The solid-liquid separation device 36 is used to roughly filter the sewage of the central pressurized pump station 37, the central pressurized pump station 37 is used to send the roughly filtered sewage into the sewage treatment tank 200 from the top of the sewage treatment tank 200, the sludge dewatering machine 38 is used to dewater the sludge in the sludge tank, the packing machine 39 is used to pack the dewatered sludge into sludge bricks, and the emergency sewage discharge device 40 is used to discharge the sewage leaked to the base layer 100 when a leak occurs from the sewage treatment tank 200.

[0029] Preferably, a partition is made surrounding the axis of the sewage treatment tank 200, and each partition is a sector with its vertex on the axis of the sewage treatment tank 200. Here, the sector may include shapes such as a minor arc, a major arc, and a semi - circle.

[0030] Adjacent partitions need to communicate. As a communication method, it may include opening water - passing holes corresponding to the positions of the partitions on each of the top wall and the bottom wall of the partition and connecting them to the water - passing holes via pipelines. A pump for controlling the direction of water flow may be provided in the pipeline. Also, without providing a pipeline, the water flow may directly flow through the water - passing holes through pressure, which will be described in detail in the following embodiments.

[0031] More preferably, in this embodiment, the volume of the aerobic zone 223 is larger than the volume of the anoxic zone 222, and the volume of the anoxic zone 222 is larger than the volume of the anaerobic zone 221. Also, 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 sewage in the corresponding regions. For example, in the embodiments of the present disclosure, the sewage may stay 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, at this time, the volume ratio of the anaerobic zone 221: anoxic zone 222: aerobic zone 223 is 1:2:5. The residence time of the sewage in each zone is not limited to the above - mentioned data and may be adjusted between 2 and 15 hours according to actual needs, but is not limited in the present disclosure.

[0032] Preferably, the sewage treatment tank 200 further includes an outer peripheral wall surrounding the side wall with a space therebetween, and the side wall and the outer peripheral wall form an installation space 23. A core cylinder 21 extending vertically is provided on the central axis of the first treatment space. A plurality of partitions are provided surrounding the core cylinder 21. The inside of the core cylinder 21 is divided into three closed regions arranged in order from top to bottom, which function as a fire pool, a water purification pool, and a sludge pool respectively. A pipeline for communicating the sewage treatment tank 200 with the sewage treatment equipment may be provided in the installation space 23, and meters of various detection devices may be arranged in the installation space 23. However, in the present invention, it is not limited thereto. By partitioning the core cylinder 21 into a fire pool, a water purification pool, and a sludge pool, the occupied area 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-region. Each sub-region is a sector with its vertex on the axis of the sewage treatment tank 200 and all have the same volume. In two adjacent sub-regions, the water flow direction is opposite. That is, for a sub-region, a water passage hole with an adjacent sub-region is formed at the bottom end of the sewage treatment tank 200 closest to the bottom, and for a sub-region, a communication part with another adjacent sub-region is formed at the top end of the sewage treatment tank 200 closest to the top. When it is necessary to stack one layer of the sewage treatment tank 200 on top, the water passage hole formed at the top end of the original top sewage treatment tank 200 can be closed, and then a water passage hole can be opened at the position corresponding to the top end of the new top sewage treatment tank 200.

[0034] To make good use of the hydraulic elevation, preferably, the water inlet is provided at the top of the anaerobic zone 221, and the drain outlet is provided at the top of the aerobic zone 223.

Embodiment

[0035] This embodiment first includes the step of constructing the base layer 100, and then the step of installing one sewage treatment cylinder 2 above the base layer 100, or stacking and installing at least two sewage treatment cylinders 2 in sequence from bottom to top to form the sewage treatment tank 200. The sewage treatment cylinder 2 includes a second treatment space 22 surrounded by side walls. The interior 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 sewage treatment cylinder 2. In adjacent sewage treatment cylinders 2, the partitions with the same function communicate with each other. Finally, it includes the step of constructing a process platform on the outer periphery of the sewage treatment tank 200, and provides a construction method for the sewage treatment system.

[0036] Based on the above technical solution, by stacking a plurality of sewage treatment cylinders 2 vertically upward on the base layer 100, the vertical space is fully utilized, and by adopting a three-dimensional construction form, the construction land is reduced and the space utilization rate of the horizontal plane is improved. In addition, both the process platform and the sewage treatment cylinder 2 can be assembled and fixed in a modular manner, so that the subsequent stacking of the sewage treatment cylinders 2 and the expansion of the process platform are more convenient and rapid, the subsequent construction is more standardized, and the construction efficiency is improved.

[0037] Preferably, the construction method further includes the step of making the water flow in the sewage treatment tank 200 flow in a vertical serpentine shape by sequentially communicating two adjacent partitions in the sewage treatment tank 200.

[0038] Specifically, each sewage treatment cylinder 2 includes a side wall. Each sewage treatment cylinder 2 is surrounded by a side wall and is cylindrical with openings at both the upper end and the lower end. The construction method further includes the step of installing the lowermost sewage treatment cylinder 2 on the sealing plate, sealing the lower end opening of the lowermost sewage treatment cylinder 2 with the sealing plate, and then sequentially stacking and installing the sewage treatment cylinders 2 upward above the lowermost sewage treatment cylinder 2.

[0039] Preferably, before stacking one upper - layer sewage treatment cylindrical body 2 on one lower - layer sewage treatment cylindrical body 2, the construction method further includes a step of reinforcing the lowermost sewage treatment cylindrical body 2 so that the force received by the treatment cylindrical body 2 meets the overall structural requirements and improves the structural strength of the entire sewage treatment facility. Also, in order to further improve the structural strength of the entire sewage treatment facility, each lower - layer sewage treatment cylindrical body 2 can be reinforced before stacking the upper - layer sewage treatment cylindrical bodies 2, but the present invention is not limited thereto.

Embodiment

[0040] In the sewage treatment tank 200 constructed in Embodiment 2, in order to prevent the leakage of sewage in the sewage treatment tank 200, it is necessary to perform a sealing treatment on the connection part of the two sewage treatment cylindrical bodies 2. In this embodiment, it is proposed to seal and connect the space between two adjacent sewage treatment cylindrical bodies 2 with a sealing ring. In order to facilitate sealing and connecting the space between adjacent sewage treatment cylindrical bodies 2 with a sealing ring, the structure of the sewage treatment cylindrical body 2 is proposed in this embodiment.

[0041] As shown in FIGS. 7 and 8, the sewage treatment cylinder according to this embodiment includes a cylinder body that is open at both the upper end and the lower end. At the lower end of the outer wall of the cylinder body, a plurality of guide rails 24 extending in the vertical direction are evenly provided along the circumferential direction of the cylinder body. At the upper end of the outer wall of the cylinder body, a plurality of guide blocks 25 are provided corresponding to the plurality of guide rails 24. A U-shaped frame 26 is connected to each guide rail 24. The open end of the U-shaped frame 26 is rotatably connected to both sides in the circumferential direction of the cylinder body of the guide rail 24 to form a rotation position. 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. Inside the first slide groove 251, a locking member 252 that can move between an initial position, a locking position 254, and a lock release position, which are arranged in sequence from bottom to top along the first slide groove 251, can be accommodated. The locking member 252 is connected to the top wall of the first slide groove 251 via a pre-compressed first elastic member 253. 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 connected in sequence from the inside (inside the cylinder body) to the outside (outside the cylinder body). 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 body is stacked on the lower-layer sewage treatment cylinder body. The guide block 25 of the lower-layer sewage treatment cylinder body is inserted into the guide rail 24 of the upper-layer sewage treatment cylinder body. 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 lock release position under the pressure action of the closed end of the U-shaped frame 26. The closed end of the U-shaped frame 26 rotates from the transition position 255 to the locking position 254. The locking member 252 moves from the lock release position to the locking position 254 under the elastic force action of the first elastic member 253.

[0043] In this way, by providing the guide rail 24 and the guide block 25, when stacking the upper-layer sewage treatment cylindrical body on the lower-layer sewage treatment cylindrical body, the guiding and positioning of the upper-layer and lower-layer sewage treatment cylindrical bodies become easy, and the installation becomes efficient. Further, due to the cooperation of the U-shaped frame 26 and the locking member 252, the installation between the upper-layer and lower-layer sewage treatment cylindrical bodies is stabilized, prestress is applied between the upper-layer and lower-layer sewage treatment cylindrical bodies, and the sealing effect of the sealing ring for the space inside the cylindrical body is ensured. By setting the locking position 254 and the transition position 255 at the bottom of the locking member 252, while enabling the closed end of the U-shaped frame 26 to move from the transition position 255 beyond to the locking position 254, the transition position 255 serves to block the U-shaped frame 26 located at the locking position 254, and it is also possible to avoid the U-shaped frame 26 from disengaging 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 that are connected in sequence from bottom to top. The guide block 25 includes a first guide block portion 256 and a second guide block portion 257 that are connected in sequence from bottom to top. The first guide rail portion 241 has a narrow upper part and a wide lower part, 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 central portion in the circumferential direction of the cylindrical body. The first guide block portion 256 has a narrow upper part and a wide lower part, and the second guide block portion 257 is elongated. The second guide rail portion 242 is provided in a shape that conforms to 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 attachment and initial positioning between the upper and lower sewage treatment cylindrical bodies, and it becomes easy to quickly insert the first guide block portion 256 into the first guide rail portion 241 (that is, to 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 inserted into the second guide rail portion 242 by self-guidance along the first guide rail portion 241. When the second guide block portion 257 is inserted into the second guide rail portion 242, the upper and lower sewage treatment cylindrical bodies can be positioned and attached 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 that are connected in sequence. The wide portion becomes the closed end of the U-shaped frame 26, and the narrow portion becomes the open end of the U-shaped frame 26. The narrow portion is rotatably connected to both sides in the circumferential direction of the cylindrical body of the second guide rail portion 242 to form a rotation position. The wide portion rotates downward around the rotation position, so that the first guide rail portion 241 can be wrapped within the wide portion. In this way, it is possible to avoid the rotating U-shaped frame 26 interfering with the first guide rail portion 241 and ensure the engagement between the U-shaped frame 26 and the locking member 252.

[0047] When actually in use, the sewage treatment cylinder body is large in volume, usually with a radius of 8 m or more. In this embodiment, in order to ensure the sealing effect between the upper and lower sewage treatment cylinder bodies, a large rigidity coefficient is required for the first elastic member 253. The greater the rigidity coefficient of the first elastic member 253, the lower the possibility that construction workers directly intervene manually to deform the first elastic member 253. In order for the construction workers to rotate the U-shaped frame 26 and cooperate with the locking member 252, the rigidity coefficient of the first elastic member 253 is reduced. In this embodiment, at the lower end of the outer wall of the cylinder body, five or more guide rails 24 along the vertical direction are evenly provided along the circumferential direction of the cylinder body. Similarly, at the upper end of the outer wall of the cylinder body, five or more guide blocks 25 are provided. Also, the radius of curvature of the transition position 255 is set to 50 - 100 mm.

[0048] However, when the radius of curvature 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 tank increases, looseness occurs in the engagement between the U-shaped frame 26 and the locking member 252. Due to the action of an uncontrollable external force, the U-shaped frame 26 is likely to move beyond the transition position 255 and disengage from the locking position 254. Therefore, a second slide groove 258 is formed at the lower end of the locking member 252, and a stopper member 259 that can move up and down along the second slide groove 258 can be accommodated in the second slide groove 258. The stopper member 259 is connected to the top wall of the second slide groove 258 via a pre-compressed second elastic member 260, and the stopper member 259 extends outward from the second slide groove 258 downward. The stopper member 259 is located on the side away from the cylindrical body at the transition position 255, and the stopper member 259 extends outward from the transition position 255 downward. In this way, the provision of the stopper member 259 further avoids the closed end of the U-shaped frame 26 from disengaging from the locking member 252 and ensures the sealing effect of the sealing ring. Furthermore, when removing the U-shaped frame 26, the stopper member 259 can be pushed to move upward above the transition position 255, and the U-shaped frame 26 can be rotated to disengage from the locking position 254. Therefore, the removal becomes easier. Due to the engagement between the stopper member 259 and the second elastic member 260, there is only a blocking action on the U-shaped frame 26. Therefore, the rigidity coefficient of the second elastic member 260 is required to be low, and the rigidity coefficient of the second elastic member 260 must be less than that of the first elastic member 253. The rigidity coefficient of the second elastic member 260 can be set to be suitable for pressing by human hands.

[0049] More preferably, the bottom of the stopper member 259 is an arc surface that extends upward. In this way, when the U-shaped frame 26 disengages from the locking member 252, it can easily pass over the stopper member 259.

[0050] Note that the above description of the specific embodiments of the present invention is only for explaining the technical route and features of the present invention, with the aim of enabling those skilled in the art to understand and implement the content of the present invention. However, 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 Reference Numerals

[0051] 100 Base layer 101 First-layer process platform 102 Second-layer process platform 103 Third-layer process platform 104 Fourth-layer process platform 200 Sewage treatment tank 2 Sewage treatment cylinder 21 Core cylinder 22 Second treatment space 221 Anaerobic zone 222 Anoxic zone 223 Aerobic zone 23 Mounting space 24 Guide rail 25 Guide block 26 U-shaped frame 241 First guide rail part 242 Second guide rail part 251 First slide groove 252 Locking member 253 First elastic member 255 Transition position 254 Locking position 255 Transition position 256 First guide block part 257 Second guide block part 258 Second slide groove 259 Stopping member 260 Second elastic member 31 Secondary sedimentation equipment 32 Advanced treatment equipment 33 Power distribution equipment 34 Stirring equipment 35 Fan equipment 36 Solid-liquid separation device 37 Central pressurized pump station 38 Sewage sludge dewatering machine 39 Packing machine 40 Emergency sewage discharge device

Claims

1. A sewage treatment system, comprising: a base layer (100), and a cylindrical sewage treatment tank (200) mounted on the base layer (100); the sewage treatment tank (200) includes a first treatment space surrounded by side walls, and the interior of the first treatment space includes three adjacent partitions in order: an anaerobic zone (221), an anoxic zone (222), and an aerobic zone (223). Each partition vertically penetrates from the top to the bottom of the sewage treatment tank (200), and two adjacent partitions communicate in sequence. Thereby, the sewage in the sewage treatment tank (200) flows along a vertical meandering path through the anaerobic zone (221), the anoxic zone (222), and the aerobic zone (223) in sequence. Above the base layer (100), a plurality of layers of process platforms arranged in order from top to bottom surround the sewage treatment tank (200). The process platforms are used to carry a secondary sedimentation facility (31) for treating the sewage discharged from the sewage treatment tank (200), an advanced treatment facility (32), and a power distribution facility (33) for the operation and maintenance of the sewage treatment tank (200). The sewage treatment system is characterized by this.

2. The plurality of layers of process platforms include a first-layer process platform (101) located at the topmost layer, and a second-layer process platform (102) located below the first-layer process platform (101) and provided adjacent to the first-layer process platform (101). The first-layer process platform (101) is equipped with a plurality of secondary sedimentation facilities (31) provided surrounding the sewage treatment tank (200). The second-layer process platform (102) is equipped with a plurality of advanced treatment facilities (32) provided surrounding the sewage treatment tank (200). The secondary sedimentation facility (31) communicates with the sewage discharge outlet of the sewage treatment tank (200), and the advanced treatment facility (32) communicates with the purified water outlet of the secondary sedimentation facility (31). The sewage treatment system according to Claim 1 is characterized by this.

3. Above the base layer (100), four process platforms, namely the first-layer process platform (101), the second-layer process platform (102), the third-layer process platform (103), and the fourth-layer process platform (104), are arranged in order from top to bottom to surround the sewage treatment tank (200). The third-layer process platform (103) is equipped with power distribution facilities (33) for the operation and maintenance of the sewage treatment tank (200). The sewage treatment system according to claim 2, characterized in that.

4. The base layer (100) is equipped with a solid-liquid separation device (36), a central pressurized pump station (37), a sludge dehydrator (38), a packing machine (39), and an emergency sewage discharge device (40). The solid-liquid separation device (36) is used to roughly filter the sewage of the central pressurized pump station (37). The central pressurized pump station (37) is used to send the roughly filtered sewage into the sewage treatment tank (200) from the top of the sewage treatment tank (200). The sludge dehydrator (38) is used to dehydrate the sludge in the sludge tank. The packing machine (39) is used to pack the dehydrated sludge into sludge bricks. The emergency sewage discharge device (40) is used to discharge the sewage leaked to the base layer (100) when a leak occurs in the sewage treatment tank (200). The sewage treatment system according to claim 1, characterized in that.

5. A partition of the first treatment space is made surrounding the axis of the sewage treatment tank (200). Each partition is a sector with its vertex on the axis of the sewage treatment tank (200). The sewage treatment system according to claim 1, characterized in that.

6. The sewage treatment tank (200) further includes an outer peripheral wall surrounding the side wall at intervals. The side wall and the outer peripheral wall constitute an installation space (23). A core cylinder (21) extending vertically is provided on the central axis of the first treatment space. A plurality of partitions are provided surrounding the core cylinder (21). The inside of the core cylinder (21) is divided into three closed regions arranged in order from top to bottom, which function as a fire water tank, a clean water tank, and a sludge tank respectively. The sewage treatment system according to claim 5, characterized in that.

7. The anaerobic zone (221), the anoxic zone (222), and the aerobic zone (223) each have at least one sub-region, and each sub-region is a sector with its vertex on the axis of the sewage treatment tank (200) and all having the same volume. The sewage treatment system according to claim 6, wherein the sub-region has a water passage hole with one adjacent sub-region formed at the bottom end of the sewage treatment cylinder body (2), and a communication part with another adjacent sub-region formed at the top end of the sewage treatment cylinder body (2).

8. A method for constructing a sewage treatment system, comprising: a step of constructing a base layer (100); a step of installing one sewage treatment cylinder body (2) above the base layer (100) or stacking and installing at least two sewage treatment cylinder bodies (2) in order from bottom to top to form a sewage treatment tank (200), wherein the sewage treatment cylinder body (2) includes a second treatment space (22) surrounded by side walls, and the inside of the second treatment space (22) is divided into a plurality of partitions having different treatment functions, each partition vertically penetrates from the top to the bottom of the sewage treatment cylinder body (2), and in adjacent sewage treatment cylinder bodies (2), the partitions having the same function communicate with each other; a step of constructing a process platform on the outer periphery of the sewage treatment tank (200). A method for constructing a sewage treatment system, characterized by comprising the above steps.

9. A sewage treatment cylinder body used in the method for constructing a sewage treatment facility according to claim 8, comprising: a cylinder body surrounded by side walls and having openings at both the upper end and the lower end, a plurality of guide rails (24) extending in the vertical direction are evenly provided along the circumferential direction of the cylinder body at the lower end of the outer wall of the cylinder body, and a plurality of guide blocks (25) are provided corresponding to the plurality of guide rails (24) at the upper end of the outer wall of the cylinder body. A U-shaped frame (26) is connected to each guide rail (24). The open end of the U-shaped frame (26) is rotatably connected to both sides in the circumferential direction of the cylindrical body of the guide rail (24) to be in a rotational position. The closed end of the U-shaped frame (26) rotates vertically around the rotational position. A first slide groove (251) is formed at the lower end of each guide block (25). A locking member (252) that is movable between an initial position, a locking position (254), and an unlocking position and is arranged in order from bottom to top along the first slide groove (251) can be accommodated in the first slide groove (251). The locking member (252) is connected to the top wall of the first slide groove (251) via a pre-compressed first elastic member (253). 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) connected in order from inside to outside. The locking position (254) is an upwardly convex arc surface, and the transition position (255) is a downwardly concave arc surface. An upper sewage treatment cylindrical body is laminated on the lower sewage treatment cylindrical body. The guide block (25) of the lower sewage treatment cylindrical body is inserted into the guide rail (24) of the upper sewage treatment cylindrical body. 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 unlocking 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 locking position (254). The locking member (252) moves from the unlocking position to the locking position (254) due to the elastic force of the first elastic member (253). The sewage treatment cylindrical body is characterized by this.

10. 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 part (241) has a narrow upper part and a wide lower part, and has the same shape as the narrow part of an ellipse. The first guide rail part (241) is connected to the second guide rail part (242) along the central part in the circumferential direction of the cylindrical body. The first guide block part (256) has a narrow upper part and a wide lower part, the second guide block part (257) is in a long shape, and the second guide rail part (242) is provided in a shape matching the shape of the second guide block part (257). The sewage treatment cylindrical body according to claim 9, characterized in that.

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