Sewage treatment system for car washing platform

Abstract

The utility model relates to the technical field of car washing platform sewage treatment, and discloses a car washing platform sewage treatment system which comprises a car washing platform main body, a first filtering mechanism, a second filtering mechanism and a clean water tank. First sewage ditches are formed in the two sides of the car washing table main body; the first filtering piece is arranged in the first sewage ditch; the second filtering mechanism is communicated with the first sewage ditch, water flow can flow into the second filtering mechanism through the first filtering mechanism, and the second filtering mechanism can filter the water flow in the first filtering mechanism again; the clean water tank is communicated with the second filtering mechanism, and clean water filtered by the second filtering mechanism can enter the clean water tank to be stored. Sewage can be prevented from blocking the first sewage ditch; and on the other hand, sewage can be efficiently and conveniently treated, secondary filtration is conducted on the sewage by arranging a second filtering mechanism, the treated sewage can be circularly used for cleaning vehicles, the utilization rate of water resources can be effectively increased, and waste of the water resources is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of car wash station sewage treatment, in particular to a car wash station sewage treatment system. Background Art

[0002] Traditional car washes usually involve driving vehicles onto the main structure of the car wash and then cleaning them with clean water. The resulting sewage is usually discharged directly into drainage ditches or sump wells on both sides of the road. This treatment method can easily cause blockage of the drainage ditches and cause certain pollution to the environment. In addition, this method has a low water resource utilization rate and is very likely to cause a waste of water resources. Utility Model Content

[0003] The embodiment of the utility model aims to provide a car wash station sewage treatment system to solve the technical problem of low water resource utilization rate and easy waste of water resources in the prior art car wash station sewage treatment system.

[0004] The utility model embodiment solves its technical problems by adopting the following technical solutions:

[0005] A car wash station sewage treatment system is provided, comprising:

[0006] A car wash station body, the car wash station body is used to place vehicles, and first sewage ditches are opened on both sides of the car wash station body, and the first sewage ditches can be used to collect sewage after washing vehicles;

[0007] A first filtering mechanism, the first filtering mechanism comprising a first filtering element, the first filtering element being disposed in the first sewage ditch;

[0008] A second filtering mechanism is connected to the first sewage ditch, and water can flow through the first filtering mechanism to the second filtering mechanism, and the second filtering mechanism can filter the water in the first filtering mechanism again;

[0009] A clean water tank is connected to the second filtering mechanism, and the clean water filtered by the second filtering mechanism can enter the clean water tank for storage.

[0010] In some embodiments, the first sewage ditch is in a U-shape, and the first filter element is in a T-shape;

[0011] The first filter element includes a first filter screen and a support plate, wherein the support plate is vertically arranged in the first sewage ditch, and the first filter screen is transversely arranged on the first sewage ditch and abuts against a side wall of the first sewage ditch;

[0012] One end of the first filter screen is connected to the first filter screen, and the other end is abutted against the bottom of the first sewage ditch.

[0013] In some embodiments, a second sewage ditch is further provided on the main body of the car wash station, and the second sewage ditch is located in the middle of the first sewage ditch on both sides;

[0014] The second sewage ditch is connected to the first sewage ditch, the second sewage ditch is V-shaped, and the slope of the second sewage ditch is not less than 45°.

[0015] In some embodiments, the first filter mechanism further includes a second filter element, the second filter includes a second filter screen, and the second filter screen is transversely disposed on the second sewage ditch and abuts against a side wall of the second sewage ditch.

[0016] In some embodiments, the second filtering mechanism includes a drain pipe, a grease trap, and a stagnation filter tank;

[0017] The first sewage channel is connected to the oil separation sedimentation tank through the drainage pipe;

[0018] The oil separation sedimentation tank is connected to the storage and filtration tank through the drainage pipe;

[0019] The storage and filtering tank is connected with the clean water tank through the drainage pipe.

[0020] In some embodiments, an oil-separating baffle is provided in the oil-separating sedimentation tank, and the oil-separating baffle is located in the middle part of the oil-separating sedimentation tank.

[0021] In some embodiments, the retention filtration pond includes an aquifer, a fine filtration layer, a coarse filtration layer, and a gravel filtration layer;

[0022] Wherein, the water storage layer, the fine filter layer, the coarse filter layer and the gravel filter layer are arranged in sequence from top to bottom in the storage and filtration tank;

[0023] One end of the drainage pipe is located in the gravel filter layer.

[0024] In some embodiments, the height of the water storage layer is 200-300mm; the thickness of the fine filter layer is 200-400mm, and the permeability coefficient of the fine filter layer is not less than 0.01mm / s; the thickness of the coarse filter layer is 150-300mm, and the diameter of the coarse filter layer material is 5-20mm; the thickness of the gravel filter layer is 150-300mm, and the diameter of the gravel filter layer material is 20-40mm.

[0025] In some embodiments, the drainage pipe located between the storage and filtration tank and the clean water tank is sloped along the clean water tank, and the slope of the bottom of the pipe is not less than 5‰.

[0026] In some embodiments, the first sewage ditch and the second sewage ditch are sloped along the direction of the oil separator sedimentation tank, and the slope of the ditch bottom is not less than 5‰.

[0027] Compared with the prior art, in the car wash station sewage treatment system provided by the embodiment of the utility model, first sewage ditches are opened on both sides of the car wash station body. When the vehicle is washed, the sewage on the surface of the vehicle can flow into the first sewage ditches on both sides, thereby achieving the purpose of collecting sewage. A first filter is arranged on the first sewage ditch, and the first filter is located at the top of the first sewage ditch. The first filter can filter large magazines, such as stones, plastic bags and large impurities, so as to prevent the first sewage ditches on both sides from being blocked due to the large volume of impurities. In addition, the second filter mechanism is interconnected with the first sewage ditch. After the first sewage ditch passes through the first filter element for preliminary filtration, the water flow can flow through the first sewage ditch to the second filter mechanism and undergo secondary filtration in the second filter mechanism, thereby obtaining clean water, which is stored in the clean water tank for use in the next car wash. Through such an arrangement, on the one hand, sewage can be prevented from clogging the first sewage ditch; on the other hand, sewage can be treated efficiently and conveniently. By setting up a second filtering mechanism to filter the sewage for a second time, the treated sewage can be recycled for vehicle cleaning, which can effectively improve the utilization rate of water resources and avoid waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 It is a structural schematic diagram of the car wash station sewage treatment system provided by the utility model;

[0030] Figure 2 It is a cross-sectional schematic diagram of the main body of the car wash station of the car wash station sewage treatment system provided by the utility model;

[0031] Figure 3 It is a connection diagram of the oil separation sedimentation tank and the storage and filtration tank of the car wash station sewage treatment system provided by the utility model;

[0032] Figure 4 It is a connection diagram of the storage and filtration tank and the clean water tank of the car wash station sewage treatment system provided by the utility model;

[0033] Figure 5 It is a structural schematic diagram of the second filter element of the car wash station sewage treatment system provided by the utility model;

[0034] Figure 6 It is a structural schematic diagram of the first filter element of the car wash station sewage treatment system provided by the utility model.

[0035] Markings in the figure:

[0036] 100. Car wash station sewage treatment system; 10. Car wash station body; 11. First sewage ditch; 12. Second sewage ditch; 20. First filtering mechanism; 21. First filter element; 211. First filter net; 212. Support plate; 22. Second filter element; 221. Second filter net; 30. Second filtering mechanism; 31. Drain pipe; 32. Oil separation sedimentation tank; 321. Oil separation baffle; 33. Storage filter tank; 331. Aquifer; 332. Fine filter layer; 333. Coarse filter layer; 334. Gravel filter layer; 40. Clear water tank. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connecting" another element, it can be directly on another element, or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0039] Combine the following Figures 1 to 6 , the car wash station sewage treatment system 100 provided in the embodiment of the present application is described in detail through a specific embodiment.

[0040] The car wash station sewage treatment system 100 provided in one embodiment of the utility model comprises a car wash station body 10, a first filter mechanism 20, a second filter mechanism 30 and a clean water tank 40. The car wash station body 10 is used to place vehicles, and first sewage ditches 11 are provided on both sides of the car wash station body 10, and the first sewage ditches 11 can be used to collect sewage after washing vehicles; the first filter mechanism 20 comprises a first filter element 21, and the first filter element 21 is arranged in the first sewage ditches 11; the second filter mechanism 30 is connected with the first sewage ditches 11, and water can flow through the first filter mechanism 20 to the second filter mechanism 30, and the second filter mechanism 30 can filter the water flow in the first filter mechanism 20 again; the clean water tank 40 is connected with the second filter mechanism 30, and the clean water filtered by the second filter mechanism 30 can enter the clean water tank 40 for storage.

[0041] In this embodiment, the car wash station wastewater treatment system 100 can be used to wash vehicles. Specifically, the vehicle can be driven onto the car wash station body 10 and washed by special equipment and tools, such as a water gun, a car wash liquid nozzle, a brush, etc. When the vehicle is washed by clean water, wastewater is usually generated during the car wash process.

[0042] First sewage ditches 11 are provided on both sides of the car wash station body 10. When washing the vehicle, sewage on the surface of the vehicle can flow into the first sewage ditches 11 on both sides, thereby achieving the purpose of collecting sewage. A first filter 21 is provided on the first sewage ditches 11. The first filter 21 is located at the top of the first sewage ditches 11. The first filter 21 can filter large impurities, such as stones, plastic bags, etc., thereby preventing the first sewage ditches 11 on both sides from being blocked due to the large volume of impurities. In addition, the second filter mechanism 30 is interconnected with the first sewage ditches 11. After the first sewage ditches 11 are initially filtered by the first filter 21, the water flow can flow through the first sewage ditches 11 to the second filter mechanism 30 and be filtered twice in the second filter mechanism 30, thereby obtaining clean water, which is stored in the clean water tank 40 for use in the next car wash. Through such an arrangement, on the one hand, sewage can be prevented from clogging the first sewage ditch 11; on the other hand, sewage can be treated efficiently and conveniently. By setting a second filtering mechanism 30 to perform secondary filtration on sewage, the treated sewage can be recycled for vehicle cleaning, which can effectively improve the utilization rate of water resources and avoid waste of water resources.

[0043] In some embodiments, the shape of the first sewage ditch 11 is U-shaped, and the shape of the first filter element 21 is T-shaped; the first filter element 21 includes a first filter net 211 and a support plate 212, the support plate 212 is vertically arranged in the first sewage ditch 11, and the first filter net 211 is horizontally arranged on the first sewage ditch 11 and abuts against the side wall of the first sewage ditch 11; one end of the first filter net 211 is connected to the first filter net 211, and the other end abuts against the bottom of the first sewage ditch 11.

[0044] The first sewage ditch 11 is in a U-shape, so that the first sewage ditch 11 has an opening arranged upward, so that sewage can automatically flow into the first sewage ditch 11. The first filter element 21 includes a first filter net 211 and a support plate 212, and the support plate 212 is located at the bottom of the first filter net 211 and is fixedly connected to the first filter net 211, so that the shape of the first filter element 21 is T-shaped. When the first filter element 21 is placed in the first sewage ditch 11, the support plate 212 is arranged at the bottom of the first sewage ditch 11, so that the support plate 212 can support the first filter net 211. In addition, the first filter net 211 abuts against the side wall of the opening of the first sewage ditch 11, and the first filter net 211 is tightly connected to the side wall of the first sewage ditch 11, so as to prevent the first filter net 211 from having a gap between the first filter net 211 and the first sewage ditch 11, which causes some impurities to enter the first sewage ditch 11 through the gap and cause the first sewage ditch 11 to be blocked.

[0045] More specifically, filter mesh holes are arranged on the first filter mesh 211 , and a plurality of filter mesh holes are evenly distributed on the first filter mesh 211 .

[0046] In some embodiments, a second sewage ditch 12 is further provided on the car wash station body 10, and the second sewage ditch 12 is located in the middle of the first sewage ditch 11 on both sides; wherein the second sewage ditch 12 is connected to the first sewage ditch 11, the shape of the second sewage ditch 12 is V-shaped, and the slope of the second sewage ditch 12 is not less than 45°.

[0047] The second sewage ditch 12 is V-shaped. By setting the second sewage ditch 12 in a V-shape, the flow rate of the sewage after flushing can be reduced, so that the sewage slowly flows into the second sewage ditch 12, preventing the sewage from splashing and splashing outside the car wash station sewage treatment system 100.

[0048] In addition, the second sewage ditch 12 is located between the first sewage ditches 11 on both sides, and the second sewage ditch 12 can be used to collect sewage at the bottom of the vehicle, for example, sewage on the chassis of the vehicle can fall into the second sewage ditch 12 and be collected in the second sewage ditch 12. The slope of the second sewage ditch 12 is not less than 45° to prevent the slope of the second sewage ditch 12 from being too small and causing sewage to splash in the second sewage ditch 12.

[0049] The second sewage ditch 12 is connected to the first sewage ditch 11 , and the water flow in the second sewage ditch 12 can flow into the first sewage ditch 11 , and flow together in the first sewage ditch 11 to the second filtering mechanism 30 for secondary filtration.

[0050] In some embodiments, the first filter mechanism 20 further includes a second filter element 22, and the second filter includes a second filter screen 221, which is transversely arranged on the second sewage ditch 12 and abuts against the side wall of the second sewage ditch 12. The second filter screen 221 abuts against the opening side wall of the second sewage ditch 12, and the second filter screen 221 and the side wall of the second sewage ditch 12 are tightly connected to prevent the second filter screen 221 and the second sewage ditch 12 from having a gap, which causes some impurities to enter the second sewage ditch 12 through the gap and cause the second sewage ditch 12 to be blocked. In addition, filter mesh holes are arranged on the second filter screen 221, and a plurality of filter mesh holes are evenly distributed on the second filter screen 221.

[0051] In some embodiments, the second filtering mechanism 30 includes a drain pipe 31, an oil separation sedimentation tank 32, and a retention filter tank 33; the first sewage ditch 11 is connected to the oil separation sedimentation tank 32 through the drain pipe 31; the oil separation sedimentation tank 32 is connected to the retention filter tank 33 through the drain pipe 31; the retention filter tank 33 is connected to the clean water tank 40 through the drain pipe 31. The drain pipe 31 can be used to guide sewage from the first sewage ditch 11 to the oil separation sedimentation tank 32, then from the oil sedimentation tank to the retention filter tank 33, and then to the clean water tank 40 through the retention filter tank 33. In this embodiment, the drain pipe 31 can play a role in transmitting sewage.

[0052] Regarding the above-mentioned oil separation sedimentation tank 32 and retention filter tank 33, the oil separation sedimentation tank 32 can be used to separate grease and suspended matter in sewage. The oil separation sedimentation tank 32 guides the flow of sewage so that grease and suspended matter are precipitated to the bottom of the tank, and clean water flows out from the top of the tank. The retention filter tank 33 is a facility for further purifying sewage. The retention filter tank 33 is usually composed of several layers of filter materials (such as sand and gravel), which can be used to filter and absorb suspended matter and organic matter in sewage.

[0053] Specifically, the first sewage ditch 11 is connected to the oil separation sedimentation tank 32 through the drainage pipe 31, so that the sewage flows into the oil separation sedimentation tank 32. The oil separation sedimentation tank 32 is connected to the storage filter tank 33 through the drainage pipe 31, so that the separated sewage flows into the storage filter tank 33. The storage filter tank 33 is connected to the clean water tank 40 through the drainage pipe 31, so that the filtered and purified water flows into the clean water tank 40. Through such a setting, after the sewage is processed by the second filtering mechanism 30, the grease, suspended matter and organic matter therein are separated and purified, and the clean water finally enters the clean water tank 40 and is stored, which is convenient for the next vehicle cleaning, and can effectively save water resources.

[0054] In some embodiments, an oil-separating baffle 321 is provided in the oil-separating sedimentation tank 32, and the oil-separating baffle 321 is located in the middle of the oil-separating sedimentation tank 32. An oil-separating baffle 321 is provided in the oil-separating sedimentation tank 32, and the oil-separating baffle 321 is located in the middle of the oil-separating sedimentation tank 32. The function of the oil-separating baffle 321 is to block the flow of grease and suspended matter when sewage flows into the oil-separating sedimentation tank 32, so that the grease and suspended matter are deposited on the side behind the oil-separating baffle 321, thereby effectively separating the grease and suspended matter. In this way, the oil-separating baffle 321 can help improve the separation effect of the oil-separating sedimentation tank 32, and ensure that clean water flows out from the other side of the oil-separating baffle 321.

[0055] In some embodiments, the storage and filtration pool 33 includes a water storage layer 331, a fine filter layer 332, a coarse filter layer 333 and a gravel filter layer 334; wherein the water storage layer 331, the fine filter layer 332, the coarse filter layer 333 and the gravel filter layer 334 are arranged in sequence from top to bottom in the storage and filtration pool 33; one end of the drainage pipe 31 is located in the gravel filter layer 334.

[0056] The storage and filtration pool 33 is composed of an aquifer 331, a fine filter layer 332, a coarse filter layer 333 and a gravel filter layer 334, and is arranged in order from top to bottom. One end of the drain pipe 31 is located in the gravel filter layer 334. Among them, the aquifer 331 is mainly used to store sewage to smoothly supply the fine filter layer 332 below. It can play a role in regulating the water flow rate and keeping the water stable. The fine filter layer 332 is usually composed of fine sand or fine gravel. Its function is to filter smaller particles, suspended matter and organic matter in sewage and purify water quality. The coarse filter layer 333 is usually composed of larger particles of sand or gravel. It is used to further filter large particles of suspended matter and solid impurities and provide better filtering effect. The gravel filter layer 334 is usually composed of larger stones or gravel. Its function is to provide support and channels so that water can flow evenly through the filter layer and further filter larger particles of suspended matter.

[0057] One end of the drain pipe 31 is located in the gravel filter layer 334. The sewage passing through the storage filter tank 33 can flow out of the gravel filter layer 334 and be discharged into the clean water tank 40 through the drain pipe 31. Through such a setting, after being processed by the storage filter tank 33, the solid particles and suspended matter in the sewage will be further filtered and removed, thereby achieving further improvement of water quality.

[0058] In some embodiments, the height of the water storage layer 331 is 200-300 mm; the thickness of the fine filter layer 332 is 200-400 mm, and the permeability coefficient of the fine filter layer 332 is not less than 0.01 mm / s; the thickness of the coarse filter layer 333 is 150-300 mm, and the material diameter of the coarse filter layer 333 is 5-20 mm; the thickness of the gravel filter layer 334 is 150-300 mm, and the material diameter of the gravel filter layer 334 is 20-40 mm.

[0059] In some embodiments, the drain pipe 31 located between the storage and filtration tank 33 and the clean water tank 40 is sloped along the direction of the clean water tank 40, and the slope of the bottom of the pipe is not less than 5‰. The drain pipe 31 is sloped along the direction of the clean water tank 40 and laid with a slope of not less than 5‰ to ensure the speed and stability of the water flow in the drain pipe 31 and promote the smooth drainage. Specifically, by setting the slope, the sewage can form a natural flow in the drain pipe 31, accelerate the flow speed of the sewage, improve the drainage efficiency, and ensure that the sewage is quickly discharged in the pipeline. In addition, blockage can be prevented. If the water flow in the drain pipe 31 still carries suspended matter and solid particles, if the drainage speed in the pipeline is too slow, these particles will easily accumulate inside the pipeline and gradually accumulate to form a blockage. By setting the slope, the rapid flow of sewage can be maintained, the deposition of suspended matter can be reduced, and the risk of pipeline blockage can be reduced. If the drain pipe 31 is flat or has a reverse slope, the sewage will form a dead water area in the pipeline, which is easy to breed bacteria and odor, and cause water pollution. By setting the slope, it is ensured that the sewage flows smoothly, the formation of dead water areas is avoided, and the water quality is maintained clean. Through such a setting, by setting the drainage pipe 31 with a slope along the direction of the clear water tank 40, it is possible to improve the drainage efficiency, prevent blockage, avoid the formation of dead water areas, and ensure the smooth discharge of water and the clean water quality.

[0060] In some embodiments, the first sewage ditch 11 and the second sewage ditch 12 are sloped along the direction of the oil separation sedimentation tank 32, and the slope of the ditch bottom is not less than 5‰. Through such a setting, the drainage efficiency of the first sewage ditch 11 and the second sewage ditch 12 can also be improved.

[0061] It should be particularly noted that the car wash station sewage treatment system 100 provided in the embodiment of the utility model only shows the part related to the technical problem to be solved by the embodiment of the utility model. It can be understood that the car wash station sewage treatment system 100 provided in the embodiment of the utility model also includes other structures for realizing the functions of the car wash station sewage treatment system 100, including but not limited to vehicle cleaning nozzles, clean water storage mechanisms, etc.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A car wash station sewage treatment system, characterized in that: include: A car wash station body, the car wash station body is used to place vehicles, and first sewage ditches are opened on both sides of the car wash station body, and the first sewage ditches can be used to collect sewage after washing vehicles; A first filtering mechanism, the first filtering mechanism comprising a first filtering element, the first filtering element being disposed in the first sewage ditch; A second filtering mechanism is connected to the first sewage ditch, and water can flow through the first filtering mechanism to the second filtering mechanism, and the second filtering mechanism can filter the water in the first filtering mechanism again; A clean water tank is connected to the second filtering mechanism, and the clean water filtered by the second filtering mechanism can enter the clean water tank for storage.

2. The car wash station sewage treatment system according to claim 1, characterized in that: The shape of the first sewage ditch is U-shaped, and the shape of the first filter element is T-shaped; The first filter element includes a first filter screen and a support plate, wherein the support plate is vertically arranged in the first sewage ditch, and the first filter screen is transversely arranged on the first sewage ditch and abuts against a side wall of the first sewage ditch; One end of the first filter screen is connected to the first filter screen, and the other end is abutted against the bottom of the first sewage ditch.

3. The car wash station sewage treatment system according to claim 2, characterized in that: A second sewage ditch is also provided on the main body of the car washing station, and the second sewage ditch is located in the middle of the first sewage ditch on both sides; The second sewage ditch is connected to the first sewage ditch, the second sewage ditch is V-shaped, and the slope of the second sewage ditch is not less than 45°.

4. The car wash station sewage treatment system according to claim 3, characterized in that: The first filter mechanism further includes a second filter element, the second filter includes a second filter screen, and the second filter screen is transversely arranged on the second sewage ditch and abuts against the side wall of the second sewage ditch.

5. The car wash station sewage treatment system according to claim 4, characterized in that: The second filtering mechanism includes a drain pipe, an oil separation sedimentation tank and a storage and filtering tank; The first sewage channel is connected to the oil separation sedimentation tank through the drainage pipe; The oil separation sedimentation tank is connected to the storage and filtration tank through the drainage pipe; The storage and filtering tank is connected with the clean water tank through the drainage pipe.

6. The car wash station sewage treatment system according to claim 5, characterized in that: An oil separation baffle is arranged in the oil separation sedimentation tank, and the oil separation baffle is located in the middle part of the oil separation sedimentation tank.

7. The car wash station sewage treatment system according to claim 5, characterized in that: The storage and filtration pool comprises a water storage layer, a fine filtration layer, a coarse filtration layer and a gravel filtration layer; Wherein, the water storage layer, the fine filter layer, the coarse filter layer and the gravel filter layer are arranged in sequence from top to bottom in the storage and filtration tank; One end of the drainage pipe is located in the gravel filter layer.

8. The car wash station sewage treatment system according to claim 7, characterized in that: The height of the water storage layer is 200-300mm; the thickness of the fine filter layer is 200-400mm, and the permeability coefficient of the fine filter layer is not less than 0.01mm / s; the thickness of the coarse filter layer is 150-300mm, and the diameter of the coarse filter layer material is 5-20mm; the thickness of the gravel filter layer is 150-300mm, and the diameter of the gravel filter layer material is 20-40mm.

9. The car wash station sewage treatment system according to claim 8, characterized in that: The drainage pipe located between the storage and filtration tank and the clean water tank is sloped along the clean water tank, and the slope of the pipe bottom is not less than 5‰.

10. The car wash station sewage treatment system according to claim 6, characterized in that: The first sewage ditch and the second sewage ditch are sloped along the direction of the oil separation sedimentation tank, and the slope of the ditch bottom is not less than 5‰.

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