A compact spiral wastewater purification tank with high efficiency and odor prevention and its working method

Abstract

This invention discloses a highly efficient, odor-proof, compact spiral sewage purification tank and its operating method. The tank's shell houses several filter modules arranged circumferentially, with a height difference between adjacent modules to form a spiral filtration mechanism. Each filter module has an open top and a bottom plate with water passage holes. The bottom plate of the taller filter modules is inclined towards the lower ones. Inside each filter module, from top to bottom, are a water storage area, an upper water passage plate, an upper filter media, a lower water passage plate, and a lower filter media. An inlet pipe and a first outlet pipe are installed on the shell. The inlet pipe connects to the opening of the uppermost filter module, and the first outlet pipe connects to the space below the filtration mechanism. A second outlet pipe and an air inlet pipe are both located on the shell, with the air inlet pipe connected to the space below the filtration mechanism. This invention solves the problem of stagnant water and foul odor in existing rural sewage purification tanks, improving water flow.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a highly efficient, odor-proof, compact spiral wastewater purification tank and its operating method. Background Technology

[0002] A septic tank is a small-scale domestic sewage treatment device used for treating decentralized domestic sewage or similar wastewater. Most septic tanks on the market are square, but due to narrow alleyways in rural areas, the installation of square septic tanks is limited. To solve the problem of insufficient installation space, barrel-shaped septic tanks have now emerged.

[0003] In the existing technology, whether it is a square purification tank or a barrel-shaped purification tank, the internal water flow is poor, which easily forms stagnant water inside the purification tank and causes a foul smell, polluting the air quality of the surrounding environment. Although the existing purification tanks have a backwashing function, the backwashing effect is poor because the water inside has become stagnant and smelly. Summary of the Invention

[0004] The purpose of this invention is to provide a highly efficient, odor-proof, compact spiral sewage purification tank and its working method. By adopting a barrel-shaped outer shell, the area occupied by the purification tank is reduced. The filtration mechanism is spiral-shaped, further reducing the volume of the purification tank. At the same time, the height difference between adjacent filtration modules improves the flow of water and solves the problem of stagnant water and foul odor in existing rural sewage purification tanks.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: In a first aspect, the present invention provides a highly efficient, odor-proof, compact spiral wastewater purification tank, comprising a shell, a filtration mechanism, and a backwashing mechanism. The shell is barrel-shaped and internally houses several filtration modules, each fan-shaped. These modules are arranged sequentially in a circumferential direction, with a predetermined height difference between adjacent modules to form a spiral filtration mechanism. Each filtration module has an open top and several water passage holes on its bottom plate. The bottom plate of the higher filtration modules is inclined towards the lower filtration modules. The inner wall of each filtration module has two slots for mounting water passage plates. From top to bottom, each filtration module contains a water storage area, an upper water passage plate, and an upper layer... The filter includes filter media, a lower water-passing plate, and a lower layer of filter media. Both the upper and lower water-passing plates have water-passing holes. The upper layer of filter media is anthracite, and the lower layer of filter media is quartz sand. The housing is equipped with an inlet pipe and a first outlet pipe. One end of the inlet pipe is connected to the farmer's drainage pipe, and the other end is connected to the opening of the uppermost filter module. One end of the first outlet pipe is connected to the space below the filter mechanism, and the other end is equipped with a valve. The backwashing mechanism includes a second outlet pipe and an air inlet pipe. Both the second outlet pipe and the air inlet pipe are located on the housing, with the second outlet pipe located above the filter mechanism. One end of the air inlet pipe is connected to a blower, and the other end is connected to the space below the filter mechanism.

[0006] Furthermore, the height of several of the filter modules gradually decreases from the topmost filter module to the next adjacent filter module.

[0007] Furthermore, a baffle is provided between the uppermost filter module and the lowermost filter module, and both the uppermost and lowermost filter modules are inserted into the baffle. The baffle is vertically fixed inside the housing.

[0008] Furthermore, a support column is vertically fixed at the center of the housing, and the filter module is detachably connected to the inner wall of the housing and the support column by means of a socket.

[0009] Furthermore, adjacent filter modules are connected by a socket joint.

[0010] Furthermore, the diameters of the water passage holes on the lower water passage plate and the bottom plate of the filter module are both smaller than the diameter of the water passage holes on the upper water passage plate.

[0011] Furthermore, a control valve is installed on the intake pipe.

[0012] Furthermore, the height of the second outlet pipe is lower than the height of the inlet pipe.

[0013] Secondly, the present invention provides a method for operating a compact spiral wastewater purification tank with high efficiency and odor prevention, comprising the following steps: Assemble the wastewater purification tank and connect it to the farmer's drainage pipe; open the valve on the first outlet pipe, and the farmer's wastewater enters the top filter module from the inlet pipe for filtration. Excess wastewater overflows downwards according to the height difference into different filter modules for filtration. The filtered water is discharged outwards through the first outlet pipe; when the filter module becomes clogged, close the first outlet pipe and the air inlet pipe. After all filter modules are submerged in water, stop the drainage from the farmer's drainage pipe. Connect the air inlet pipe to the blower and open the air inlet pipe to blow air into the housing. The backwash wastewater is discharged outwards through the second outlet pipe; after the backwash is completed, close the air inlet pipe and open the first outlet pipe, and reopen the farmer's drainage pipe to carry out the purification and filtration work.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1. The high-efficiency odor-proof compact spiral sewage purification tank of the present invention reduces the area occupied by the purification tank by adopting a barrel-shaped shell, and the filter mechanism is spiral-shaped, further reducing the volume of the purification tank. The filter modules are installed by socket, which is convenient for installation and maintenance, reducing the cost of use. Moreover, there is a height difference between adjacent filter modules, which improves the flow of water and effectively avoids the problem of odor caused by stagnant water in the purification tank. The diameter of the water passage holes on the lower water passage plate and the bottom plate of the filter module is smaller than the diameter of the water passage holes on the upper water passage plate. On the one hand, it can effectively ensure the support of the lower filter material, and on the other hand, it can ensure the filtration speed of the upper water passage plate. At the same time, the setting of the upper water passage plate can also play a buffering role, preventing the water flow from directly washing the upper filter material due to the height difference, reducing the flow rate and ensuring the filtration effect.

[0015] 2. The high-efficiency odor-proof compact spiral sewage purification tank of the present invention, by setting a baffle between the uppermost and lowermost filter modules, ensures the overall stability of the filtration mechanism and enables the connection between the uppermost and lowermost filter modules, thus ignoring the height difference and eliminating the gap. This prevents water from the bottom of the filtration mechanism from flowing out between the uppermost and lowermost filter modules during backwashing. At the same time, it also ensures the direction of water flow and prevents the agricultural wastewater in the uppermost filter module from flowing directly into the lowermost filter module.

[0016] 3. The high-efficiency odor-proof compact spiral sewage purification tank of the present invention, through the setting of support columns, can improve the stability of the filter module installation on the one hand, and ensure the blockage at the middle position of the spiral filter mechanism on the other hand, so as to prevent the filtered water from flowing out from the middle position of the filter mechanism.

[0017] 4. The high-efficiency odor-proof compact spiral sewage purification tank of the present invention greatly reduces the replacement frequency of filter media in the filter module by setting an air inlet pipe and a second water outlet pipe for backwashing, thereby reducing operating costs. In addition, the use of the spiral filtration mechanism can effectively avoid the problem of stagnant water and odor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the highly efficient odor-proof compact spiral sewage purification tank of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between adjacent filter modules in the highly efficient odor-proof compact spiral sewage purification tank of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. First filter module; 2. Second filter module; 3. Third filter module; 4. Fourth filter module; 5. Housing; 6. Water inlet pipe; 7. First water outlet pipe; 8. Second water outlet pipe; 9. Air inlet pipe; 10. Valve; 11. First slot; 12. Second slot; 13. Support column. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "length," "width," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Example 1 like Figure 1 , Figure 2 As shown, the high-efficiency odor-proof compact spiral sewage purification tank of this embodiment 1 includes a barrel-shaped shell 5, a filtration mechanism and a backwashing mechanism. Several fan-shaped filtration modules are installed inside the shell 5. The several filtration modules are arranged in sequence along the circumference. There is a set height difference between adjacent filtration modules to form a spiral filtration mechanism. Specifically, the height of the several filtration modules gradually decreases from the uppermost filtration module to the next adjacent filtration module to form a spiral installation with a vertical height difference.

[0026] The filter module has a fan-shaped structure with an opening at the top and a bottom plate with several water passage holes evenly distributed at the bottom. The inner wall of the filter module has two layers of slots for placing the fan-shaped water passage plate.

[0027] Furthermore, the housing 5 is connected to an inlet pipe 6 and a first outlet pipe 7. The inlet pipe 6 is connected to the top opening of the uppermost filter module and is mainly used to connect to the farmer's drainage pipe so as to transport the farmer's wastewater to the uppermost filter module 1 inside the housing 5. The first outlet pipe 7 is connected to the space below the filter mechanism so as to discharge the filtered and purified water to the outside. A valve 10 is installed on the first outlet pipe 7.

[0028] like Figure 2 As shown, the inner wall of the filter module has two slots, namely the first slot 11 and the second slot 12. The first slot 11 is used to install the lower water plate, and the second slot 12 is used to place the upper water plate. Both the lower and upper water plates are fan-shaped plate structures and have several water holes. In this embodiment 1, the filter module is also equipped with two layers of filter media. The lower layer of filter media is quartz sand, which is located between the lower water-passing plate and the bottom plate of the filter module. The upper layer of filter media is anthracite, which is located between the lower water-passing plate and the upper water-passing plate. Since the anthracite is relatively large, the diameter of the water-passing holes on the lower water-passing plate and the bottom plate of the filter module is smaller than that on the upper water-passing plate. This effectively ensures the support of the quartz sand and the filtration speed of the upper water-passing plate.

[0029] At this time, the area between the upper water plate and the top opening of the filter module is the water storage area. The upper water plate also serves as a buffer to prevent the water flow from directly scouring the upper filter media due to the height difference, thereby reducing the flow rate and ensuring the filtration effect.

[0030] For ease of explanation, four filter modules will be used: first filter module 1, second filter module 2, third filter module 3, and fourth filter module 4. These four modules are arranged circumferentially within the housing 5. The first filter module 1 is the tallest, forming the uppermost layer of the filter mechanism. It is inclined towards the second filter module 2, which is lower than the first filter module 1. One side of the second filter module 2 is connected to the first filter module 1 (e.g., ...). Figure 2 As shown in the figure, a height difference is formed between the first filter module 1 and the second filter module 2, allowing the farm wastewater in the first filter module 1 to overflow into the second filter module 2, which is more conducive to the flow of water and reduces the possibility of stagnant water and foul odor.

[0031] Similarly, the height of the third filter module 3 is lower than that of the second filter module 2, the second filter module 2 is tilted toward the third filter module 3, and one side of the third filter module 3 is connected to the side of the second filter module 2 that is away from the first filter module 1.

[0032] The fourth filter module 4 is lower in height than the third filter module 3. The fourth filter module 4 is the lowest layer of the entire filter mechanism. The third filter module 3 is inclined toward the fourth filter module 4, and one side of the fourth filter module 4 is connected to the side of the third filter module 3 away from the second filter module 2. The other side of the fourth filter module 4 is connected to the first filter module 1.

[0033] The first filter module 1, the second filter module 2, the third filter module 3, and the fourth filter module 4 are all connected to the inner wall of the housing 5 by a socket-insertion method, that is, the inner wall of the housing 5 is provided with slots for inserting the filter units; and adjacent filter modules are also connected by a socket-insertion method, that is, the first filter module 1 and the second filter module 2 are inserted together, the second filter module 2 and the third filter module 3 are inserted together, and the third filter module 3 and the fourth filter module 4 are inserted together.

[0034] To ensure airtightness, a baffle is provided between the uppermost and lowermost filter modules. The baffle is vertically fixed inside the housing 5 and is fixedly connected to the support column 13 and the inner wall of the housing 5. The adjacent sides of the uppermost and lowermost filter modules are inserted into the baffle to achieve connection.

[0035] It is understood that the specific height of the baffle needs to be determined according to actual needs, and this invention does not impose too many restrictions.

[0036] Specifically, in this embodiment, a baffle is provided between the fourth filter module 4 and the first filter module 1. The fourth filter module 4, the first filter module 1 and the side adjacent to the baffle are all inserted into the baffle. On the one hand, this ensures the overall installation firmness of the filter mechanism. On the other hand, it enables the connection between the uppermost filter module and the lowermost filter module, ignoring the height difference and eliminating the gap. This prevents water from the bottom of the filter mechanism from flowing out between the uppermost filter module and the lowermost filter module during backwashing. At the same time, it also ensures the direction of water flow and prevents the farm wastewater in the uppermost filter module from flowing directly into the lowermost filter module.

[0037] The housing 5 is also equipped with a support column 13, which is vertically fixed at the center of the housing 5. The filter module is connected to the support column 13 by a socket. The support column 13 is used to improve the installation stability of the filter module and to ensure the blockage at the middle position of the spiral filter mechanism, so as to prevent the filtered water from flowing out from the middle position of the filter mechanism.

[0038] It is understandable that the top of the housing 5 is an openable structure for maintenance work. The specific structure can be determined according to the actual design requirements, and no further restrictions are imposed here.

[0039] The filtration mechanism in the high-efficiency odor-proof compact spiral sewage purification tank of this embodiment 1 is modularly designed, and the filter media, water-passing plates, etc. in the filtration mechanism can be disassembled and replaced. The overall structure is simple, and the installation, use and maintenance are convenient, saving the cost.

[0040] Meanwhile, the housing 5 is also equipped with a second water outlet pipe 8 and an air inlet pipe 9 as a backwashing mechanism. The second water outlet pipe 8 is located above the filter mechanism and its height is lower than that of the water inlet pipe 6. It is mainly used for the discharge of backwashing wastewater. The lower height of the second water outlet pipe 8 compared to the water inlet pipe 6 can effectively prevent backwashing wastewater from flowing back to the farmers. The air inlet pipe 9 is mainly used to connect with the blower. The air inlet pipe 9 is connected to the lower space of the filter mechanism to blow air into the lower space of the filter mechanism, thereby realizing the air-water backwashing operation.

[0041] Understandably, the air inlet pipe 9 is also equipped with a control valve to prevent purified water from flowing out of the air inlet pipe 9 when it is not in operation; or the air inlet pipe 9 can assist the drainage work of the first water outlet pipe 7. The specific setting method can be determined according to actual needs, and no further restrictions are imposed here.

[0042] Example 2 The working method of the high-efficiency odor-proof compact spiral sewage purification tank in this embodiment 2 includes the following steps: First, the filter mechanism is installed in the housing 5 in a spiral shape with a vertical height difference, and the water inlet pipe 6 is connected to the farmer's drainage pipe.

[0043] During normal operation, valve 10 on the first outlet pipe 7 is opened, and the farmer's wastewater enters the uppermost filter module (i.e., the first filter module 1 in Example 1) from the inlet pipe 6.

[0044] The wastewater from farmers in the first filtration module 1 passes through the upper water plate, upper filter media, lower water plate, lower filter media, and the bottom plate of the first filtration module 1 in sequence, and is then filtered and purified before falling into the space below the first filtration module 1 for temporary storage or being discharged directly through the first outlet pipe 7.

[0045] When there is too much farm wastewater in the first filter module 1, the excess farm wastewater overflows from the first filter module 1 into the second filter module 2, and then passes through the upper water plate, upper filter media, lower water plate, lower filter media, and bottom plate of the second filter module 2 in sequence to complete filtration and purification. The wastewater then falls into the space below the second filter module 2 for temporary storage or is discharged directly through the first outlet pipe 7.

[0046] Similarly, excess farm wastewater in the second filter module 2 can overflow into the next level filter module for filtration. It can be understood that excess farm wastewater can eventually overflow into the bottom filter module. The specific number of overflow levels needs to be determined based on the actual situation, and no further restrictions are imposed here.

[0047] When the filtration module is not working properly, close valve 10 on the first outlet pipe 7 and close valve on air inlet pipe 9. After all the filter modules are submerged in water, stop the drainage from the farmer's drain pipe. Connect air inlet pipe 9 to blower and open valve on air inlet pipe 9. Blower starts working and blows air into housing 5 for air-water backwashing. Backwash wastewater is discharged out through second outlet pipe 8.

[0048] After backwashing is completed, close the air inlet pipe 9 and open the valve 10 on the first water outlet pipe 7, and open the farmer's drainage pipe to carry out purification and filtration again.

[0049] In this embodiment 2, air and water backwashing is used to clean the filter module, which greatly reduces the frequency of filter media replacement in the filter module and reduces operating costs.

[0050] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A compact spiral wastewater purification tank with high efficiency and odor prevention, characterized in that, The system includes a housing, a filtration mechanism, and a backwashing mechanism. The housing is barrel-shaped and houses several filter modules, which are fan-shaped and arranged circumferentially. Adjacent filter modules have a predetermined height difference to form a spiral filtration mechanism. Each filter module has an open top and several water passage holes on its bottom plate. The bottom plates of the higher filter modules are inclined towards the lower ones. The inner wall of each filter module has two slots for mounting water passage plates. From top to bottom, each filter module contains a water storage area, an upper water passage plate, upper filter media, a lower water passage plate, and a lower filter media. Both the upper and lower water-passing plates have water-passing holes. The upper filter material is anthracite, and the lower filter material is quartz sand. The housing is equipped with an inlet pipe and a first outlet pipe. One end of the inlet pipe is connected to the farmer's drainage pipe, and the other end is connected to the opening of the uppermost filter module. One end of the first outlet pipe is connected to the space below the filter mechanism, and the other end is equipped with a valve. The backwashing mechanism includes a second outlet pipe and an air inlet pipe. Both the second outlet pipe and the air inlet pipe are located on the housing, with the second outlet pipe located above the filter mechanism. One end of the air inlet pipe is connected to a blower, and the other end is connected to the space below the filter mechanism.

2. The compact spiral sewage purification tank with high efficiency and odor prevention according to claim 1, characterized in that, The height of several of the filter modules gradually decreases from the topmost filter module to the next adjacent filter module.

3. The compact spiral sewage purification tank with high efficiency and odor prevention according to claim 1, characterized in that, A baffle is provided between the uppermost filter module and the lowermost filter module. Both the uppermost and lowermost filter modules are inserted into the baffle, which is vertically fixed inside the housing.

4. The compact spiral sewage purification tank with high efficiency and odor prevention according to claim 1, characterized in that, A support column is vertically fixed at the center of the housing, and the filter module is detachably connected to the inner wall of the housing and the support column by means of a socket.

5. The compact spiral sewage purification tank with high efficiency and odor prevention according to claim 4, characterized in that, The adjacent filter modules are connected by a socket joint.

6. The compact spiral sewage purification tank with high efficiency and odor prevention according to claim 1, characterized in that, The diameters of the water passage holes on the lower water passage plate and the bottom plate of the filter module are both smaller than the diameter of the water passage holes on the upper water passage plate.

7. The compact spiral sewage purification tank with high efficiency and odor prevention according to claim 1, characterized in that, A control valve is installed on the air intake pipe.

8. A compact spiral sewage purification tank with high efficiency and odor prevention according to any one of claims 1-7, characterized in that, The height of the second outlet pipe is lower than the height of the inlet pipe.

9. A method for operating a compact spiral wastewater purification tank with high efficiency odor prevention according to any one of claims 1-8, characterized in that, Includes the following steps: Assemble the wastewater purification tank and connect it to the farmer's drainage pipe; open the valve on the first outlet pipe, and the farmer's wastewater enters the top filter module from the inlet pipe for filtration. Excess wastewater overflows downwards according to the height difference into different filter modules for filtration. The filtered water is discharged outwards through the first outlet pipe; when the filter module becomes clogged, close the first outlet pipe and the air inlet pipe. After all filter modules are submerged in water, stop the drainage from the farmer's drainage pipe. Connect the air inlet pipe to the blower and open the air inlet pipe to blow air into the housing. The backwash wastewater is discharged outwards through the second outlet pipe; after the backwash is completed, close the air inlet pipe and open the first outlet pipe, and reopen the farmer's drainage pipe to carry out the purification and filtration work.

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