An airport rainwater and sewage diversion treatment system

Abstract

An airport rainwater and sewage diversion treatment system includes a rainwater pipe, rainwater and sewage diversion facilities, a confluence treatment facility, and a centralized treatment facility. The rainwater and sewage diversion facilities are located on both sides of the open drainage ditch and include a limit trough, a clean water trough, and a sewage trough connected in sequence. The confluence treatment facility is located at the end of the rainwater and sewage diversion facility and includes a primary water inlet plate, a secondary water inlet plate, a water outlet plate, and a sludge well. The centralized treatment facility is located outside the end connecting channel and connected to the rainwater pipe. The centralized treatment facility includes a rainwater storage sedimentation tank, a filtration tank, and disinfection equipment in sequence. A pressurizing facility is located at the end of the disinfection equipment and connected to a water point. This system controls initial rainwater pollution at the airport while recycling rainwater resources, resulting in good environmental and economic benefits. Furthermore, the system is easy to deploy and highly applicable. It can be applied to new airports, airport renovations, and airport sponge city transformations.

Description

Technical Field

[0001] The present invention belongs to the technical field of airport drainage, and in particular relates to an airport rainwater and sewage diversion treatment system and a setting method thereof. Background Art

[0002] A flat area is set up between the airport runway and the airport taxiway, and intermediate connecting roads are set up between several flat areas. End connecting roads are set up at the ends of the flat areas at both ends. In the existing technology, plants are planted in the flat area and drainage ditches are dug through all the flat areas to lead rainwater into the drainage ditch and discharge it outside the airport. The drainage ditch is divided into open drainage ditch and hidden drainage ditch. The drainage ditch located in the flat area is the open drainage ditch exposed on the bottom surface, while the intermediate connecting road and the end connecting road are connected to the open drainage ditch through the underground drainage hidden ditch.

[0003] When rain falls on an airport, the initial runoff washes off the pavement, causing a certain amount of pollutants in the rainwater. On the one hand, these pollutants can accumulate in the drainage ditches, causing blockage and waterlogging. On the other hand, the discharge of this polluted rainwater into off-site water bodies can pollute the water and pose an environmental risk. Furthermore, due to the airport's large area and the abundant water resources accumulated after rainfall, most rainfall is currently discharged directly outside the airport through drainage ditches, resulting in a waste of water resources. Summary of the Invention

[0004] In order to provide a method for collecting rainwater in an airport by quality, recycling it after treatment, and solve the water hazards caused by the accumulation of polluted impurities, the present invention provides an airport rainwater and sewage diversion treatment system and a method for setting up the system.

[0005] An airport rainwater and sewage diversion treatment system, characterized in that the system includes rainwater pipes, rainwater and sewage diversion facilities, confluence treatment facilities and centralized treatment facilities;

[0006] The rainwater pipe is arranged beside the drainage ditch and parallel to the drainage ditch, and a rainwater inspection well is arranged on the path of the rainwater pipe;

[0007] Rainwater and sewage diversion facilities are set up on both sides of the open drainage ditch, including a limit trough, a clean water trough and a sewage trough. One side of the limit trough is fixed to the wall of the open drainage ditch through a limit plate, and the other side of the limit trough is connected to the clean water trough and the sewage trough in sequence. The clean water trough is a trough body closed on all four sides, and a clean water hole is opened on the upper part of the trough wall away from the limit trough. The sewage trough is a trough body with an open top surface. The side panels on both sides are adhesive vertical plates and sand retaining vertical plates respectively. The adhesive vertical plates are connected to the middle part of the clean water trough wall with the clean water hole and are located below the clean water hole. A sand accumulation area with a slope is formed between the edge of the flat area and the sand retaining vertical plates.

[0008] The confluence treatment facility is arranged at the end of the rainwater and sewage diversion facility, including a first-level water inlet plate, a second-level water inlet plate, a water outlet plate and a silt pit. The first-level water inlet plate, the second-level water inlet plate and the water outlet plate that match the cross-sectional size of the sewage tank are arranged in sequence at the inner end of the sewage tank. A first-level water inlet hole is provided on the first-level water inlet plate, a second-level water inlet hole is provided on the second-level water inlet plate, and a water outlet hole is provided on the water outlet plate. A first-level sewage interception area is formed between the first-level water inlet plate and the second-level water inlet plate and filled with large-diameter gravel. A second-level sewage interception area is formed between the second-level water inlet plate and the water outlet plate and filled with small-diameter gravel. The ends of the sewage tank and the clean water tank are connected to the silt pit together. One side of the bottom of the silt pit is a silt pit, and the other side is connected to the rainwater inspection well through a connecting pipe. A silt pit cover is provided at the silt pit mouth.

[0009] The centralized treatment facility is arranged outside the end connecting channel and is connected to the rainwater pipe. The centralized treatment facility includes a rainwater storage sedimentation tank, a filtration tank and a disinfection equipment arranged in sequence. A pressurizing facility is arranged at the end of the disinfection equipment and is connected to a water point.

[0010] Preferably, the height of the limiting plate is not less than 15 cm, the width of the clean water trough is not less than 30 cm, the depth is not less than 40 cm, the width of the sewage trough is not less than 20 cm, the height of the adhesive vertical plate is not less than 20 cm, the height of the sand blocking vertical plate is not less than 30 cm, and the top is flush with the top surface of the limiting trough and the clean water trough, and the depth of the sand accumulation area is not less than 20 cm.

[0011] Preferably, the adhesive vertical plate of the sewage tank is connected to the wall of the clean water tank by adhesive tape.

[0012] Preferably, the diameter of the clear water holes is not less than 2 cm, and the net distance between them is not less than 2 cm.

[0013] Preferably, the distance between the rainwater pipe and the drainage ditch is not less than 1m, the thickness of the soil covering the buried rainwater pipe is not less than 0.7m, the longitudinal slope is not less than 0.005°, and the diameter of the rainwater pipe is not less than 500mm.

[0014] Preferably, the rainwater inspection wells are arranged at places where the straight-line interval of the rainwater pipe is no more than 40m, at bends, at places where the slope changes, and at places where the pipe diameter changes.

[0015] Preferably, the aperture of the first-level water inlet hole is not greater than 2 cm, and the net distance between them is not less than 2 cm; the aperture of the second-level water inlet hole is not greater than 1 cm, and the net distance between them is not less than 1 cm; the aperture of the water outlet hole is not greater than 1 cm, and the net distance between them is not less than 1 cm; the distance between the first-level water inlet plate and the second-level water inlet plate is not less than 0.5 m, and the distance between the second-level water inlet plate and the water outlet plate is not less than 0.5 m; the large-diameter gravel particle size is 2-3 cm; the small-diameter gravel particle size is 1-2 cm.

[0016] Preferably, the depth of the silt well is not less than 0.8 m, the well width is not less than 0.5 m, and the depth of the silt area is not less than 0.25 m.

[0017] Preferably, the diameter of the connecting pipe is not less than 300 mm.

[0018] The beneficial effects of the present invention are as follows: initial rainwater from the airport flight area undergoes a first round of filtration through a sloping sandy accumulation area. Plants planted within the sandy accumulation area trap large impurities. Rainwater flowing into the sewage trough undergoes sewage interception and sedimentation before being treated in centralized treatment facilities for use in airport greening, irrigation, and other watering areas. When there is excessive rainwater, rainwater from the upper part of the sewage trough, which contains fewer impurities, flows through the clean water holes into the clean water trough and then into the sedimentation well for post-treatment and utilization. This system not only controls water pollution from initial rainwater at the airport but also recycles rainwater resources, achieving significant environmental and economic benefits. Furthermore, the system is easy to deploy and highly applicable, making it suitable for new airports, airport renovations, and airport sponge city upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the plan layout of an airport rainwater and sewage diversion treatment system.

[0020] Figure 2 This is a schematic diagram of the layout of rainwater and sewage diversion facilities.

[0021] Figure 3 This is a cross-sectional diagram of the rainwater and sewage diversion facilities.

[0022] Figure 4 This is a three-dimensional schematic diagram of the rainwater and sewage diversion facilities.

[0023] Figure 5 Schematic diagram of the adhesive tape between the clean water tank and the sewage tank.

[0024] Figure 6 This is a plan diagram of the confluence treatment facility.

[0025] Figure 7 This is a schematic cross-sectional diagram of the confluence treatment facility.

[0026] Figure 8 This is a schematic diagram of the structure of the primary and secondary sewage interception areas.

[0027] Figure 9 This is a schematic diagram of the first-level water inlet plate structure.

[0028] Figure 10 This is a schematic diagram of the secondary water inlet plate structure.

[0029] Figure 11 Schematic diagram of the water outlet plate structure.

[0030] Figure 12 This is a processing flow chart of an airport rainwater and sewage diversion treatment system.

[0031] Among them: 1-rainwater and sewage diversion facilities, 101-limiting trough, 102-clean water trough, 103-sewage trough, 104-limiting plate, 105-clean water hole, 106-adhesive vertical plate, 107-sand blocking vertical plate, 108-adhesive tape, 2-flat area, 3-open drainage ditch, 4-covered drainage ditch, 5-middle connecting channel, 6-end connecting channel, 7-rainwater pipe, 8-rainwater inspection well, 9-convective treatment facilities, 901-first-level sewage interception area, 902 -Secondary sewage interception area, 903-first-level water inlet plate, 904-first-level water inlet hole, 905-secondary water inlet plate, 906-secondary water inlet hole, 907-outlet plate, 908-outlet hole, 909-sludge well, 910-sludge area, 911-sludge well cover, 912-connecting pipe, 10-centralized treatment facility, 11-sand accumulation area, 12-rainwater storage and sedimentation tank, 13-filtration tank, 14-disinfection equipment, 15-water use point. DETAILED DESCRIPTION

[0032] Example 1:

[0033] like Figure 1 As shown, a flat area 2 is set up between the airport runway and the airport taxiway. Intermediate connecting roads 5 are set up between several flat areas 2, and end connecting roads 6 are set up at the ends of the flat areas at both ends. Plants are planted in the flat areas 2, and drainage ditches are dug through all flat areas 2 to guide rainwater into the drainage ditches and discharge it outside the airport. The drainage ditches are divided into open drainage ditches 3 and hidden drainage ditches 4. The drainage ditches located in the flat areas 2 are exposed open drainage ditches 3 on the bottom surface, while the intermediate connecting roads 5 and the end connecting roads 6 are connected to the open drainage ditches 3 through underground hidden drainage ditches 4. An airport rainwater and sewage diversion treatment system is set up, including rainwater pipes 7, rainwater and sewage diversion facilities 1, confluence treatment facilities 9, and centralized treatment facilities 10.

[0034] The rainwater pipe 7 is buried 1m away from the drainage ditch and parallel to the drainage ditch. The thickness of the buried soil covering the rainwater pipe 7 is 0.7m. The diameter of the rainwater pipe 7 is 500mm. Rainwater inspection wells 8 are set every 40m in the straight line of the rainwater pipe 7, at the bends, at the slope changes and at the diameter changes.

[0035] like Figure 2 、 Figure 3 、 Figure 4As shown, the rainwater and sewage diversion facility 1 is set on both sides of the open drainage ditch 3, including a limit groove 101, a clean water trough 102 and a sewage trough 103. One side of the limit groove 101 is fixed to the wall of the open drainage ditch 3 through a limit plate 104, and the other side of the limit groove 101 is connected to the clean water trough 102 and the sewage trough 103 in sequence. The clean water trough 102 is a trough body closed on all four sides, and a clean water hole 102 is opened on the upper part of the trough wall away from the limit groove 101. The diameter of the clean water hole is 2 cm, and the net distance is 2 cm. The sewage trough 103 is a trough body with an open top surface. The side panels on both sides are respectively an adhesive vertical plate 106 and a sand retaining vertical plate 107. The adhesive vertical plate 106 is adhesively connected to the middle part of the wall of the clean water trough 102 with the clean water hole 105, and the adhesive vertical plate 106 is located below the clean water hole 105. The limit plate 104 is 15 cm high, the clean water trough 102 has a net width of 30 cm and a net depth of 40 cm; the sewage trough 103 has a net width of 20 cm, the adhesive plate 106 is 20 cm high, and the sand retaining plate 107 is 30 cm high, with its top flush with the top surfaces of the limit trough 101 and the clean water trough 102. A sloping sand accumulation area 11 is formed between the edge of the flat area 2 and the sand retaining plate 107, with a depth of 20 cm.

[0036] like Figure 6 、 Figure 7 、 Figure 8 As shown, the combined flow treatment facility 9 is located at the end of the rainwater and sewage diversion facility 1 and includes a primary inlet plate 903, a secondary inlet plate 905, an outlet plate 907, and a sludge well 909. The primary inlet plate 903, secondary inlet plate 905, and outlet plate 907, which match the cross-sectional dimensions of the sewage tank 103, are sequentially arranged at the end of the sewage tank 103. The primary inlet plate 903 has a primary inlet hole 904 with a diameter of 2 cm and a clearance of 2 cm. The secondary inlet plate 905 has a secondary inlet hole 906 with a diameter of 1 cm and a clearance of 1 cm. The outlet plate 907 has an outlet hole 908 with a diameter of 1 cm and a clearance of 1 cm. The first-stage inlet plate 903 and the second-stage inlet plate 905 are spaced 0.5 meters apart, forming a first-stage interception zone 901 filled with large-diameter gravel of 2-3 cm in diameter. The second-stage inlet plate 905 and the outlet plate 907 are spaced 0.5 meters apart, forming a second-stage interception zone 902 filled with small-diameter gravel of 1-2 cm in diameter. The ends of the sewage trough 103 and the clean water trough 102 are connected to a silt pit 909, which is 0.8 m deep and 0.5 m wide. One side of the bottom of silt pit 909 is a silt area 910, with a depth of at least 0.25 m. The other side is connected to the rainwater inspection well 8 via a 300 mm diameter connecting pipe 912. Finally, a silt pit cover 911 is installed at the mouth of silt pit 909.

[0037] The centralized treatment facility 10 is arranged outside the end connecting channel 6 and connected to the rainwater pipe 7. The centralized treatment facility 10 is provided with a rainwater storage sedimentation tank 12, a filtration tank 13 and a disinfection device 14 in sequence. A pressurizing facility is provided at the end of the disinfection device 14 and is connected to a water point.

[0038] like Figure 10 As shown, the process of rainwater and sewage diversion treatment is as follows: rainwater flows through the sand accumulation area 11, where larger impurities are intercepted by the plants planted in the sand accumulation area 11, and the remaining rainwater flows into the rainwater and sewage diversion facility 1. When the water volume is low, rainwater only flows from the sewage tank 103 into the combined treatment facility 9, where it is intercepted in the primary sewage interception area 901 and the secondary sewage interception area 902, respectively, and impurities larger than 1 cm in the rainwater are intercepted. When the rainwater volume is high, the rainwater in the upper part of the sewage tank 103 flows into the clean water tank 102 through the clean water hole 105. Because the impurities mixed in the rainwater flow to the lower part of the sewage tank 103, the rainwater entering the clean water tank 102 contains only a small amount of lighter impurities. The rainwater in the clean water tank 102 and the intercepted rainwater in the sewage tank 103 flow into the sludge well 909 together. The remaining impurities in the rainwater are precipitated in the sludge area 910. The remaining rainwater is precipitated again in the rainwater storage sedimentation tank 12, and then filtered in the filter tank 13 and disinfected by the disinfection equipment 14 before being used at the water points 15 for airport greening, watering, etc.

Claims

1. An airport rainwater and sewage diversion treatment system, characterized in that The system includes stormwater pipes, rainwater and sewage diversion facilities, combined treatment facilities and centralized treatment facilities; The rainwater pipe is arranged beside the drainage ditch and parallel to the drainage ditch, and a rainwater inspection well is arranged on the path of the rainwater pipe; Rainwater and sewage diversion facilities are set up on both sides of the open drainage ditch, including a limit trough, a clean water trough and a sewage trough. One side of the limit trough is fixed to the wall of the open drainage ditch through a limit plate, and the other side of the limit trough is connected to the clean water trough and the sewage trough in sequence. The clean water trough is a trough body closed on all four sides, and a clean water hole is opened on the upper part of the trough wall away from the limit trough. The sewage trough is a trough body with an open top surface. The side panels on both sides are adhesive vertical plates and sand retaining vertical plates respectively. The adhesive vertical plates are connected to the middle part of the clean water trough wall with the clean water hole and are located below the clean water hole. A sand accumulation area with a slope is formed between the edge of the flat area and the sand retaining vertical plates. The confluence treatment facility is arranged at the end of the rainwater and sewage diversion facility, including a first-level water inlet plate, a second-level water inlet plate, a water outlet plate and a silt pit. The first-level water inlet plate, the second-level water inlet plate and the water outlet plate that match the cross-sectional size of the sewage tank are arranged in sequence at the inner end of the sewage tank. A first-level water inlet hole is provided on the first-level water inlet plate, a second-level water inlet hole is provided on the second-level water inlet plate, and a water outlet hole is provided on the water outlet plate. A first-level sewage interception area is formed between the first-level water inlet plate and the second-level water inlet plate and filled with large-diameter gravel. A second-level sewage interception area is formed between the second-level water inlet plate and the water outlet plate and filled with small-diameter gravel. The ends of the sewage tank and the clean water tank are connected to the silt pit together. One side of the bottom of the silt pit is a silt pit, and the other side is connected to the rainwater inspection well through a connecting pipe. A silt pit cover is provided at the silt pit mouth. The centralized treatment facility is arranged outside the end connecting channel and is connected to the rainwater pipe. The centralized treatment facility includes a rainwater storage sedimentation tank, a filtration tank and a disinfection equipment arranged in sequence. A pressurizing facility is arranged at the end of the disinfection equipment and is connected to a water point.

2. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The height of the limiting plate shall not be less than 15 cm, the width of the clean water trough shall not be less than 30 cm, and the depth shall not be less than 40 cm; the adhesive vertical plate of the sewage trough shall be connected to the wall of the clean water trough by adhesive tape, the width of the sewage trough shall not be less than 20 cm, the height of the adhesive vertical plate shall not be less than 20 cm, the height of the sand blocking vertical plate shall not be less than 30 cm, and the top shall be flush with the limiting trough and the top surface of the clean water trough, and the depth of the sand accumulation area shall not be less than 20 cm.

3. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The diameter of the clear water holes is not less than 2 cm, and the net distance between them is not less than 2 cm.

4. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The distance between the rainwater pipe and the drainage ditch shall not be less than 1m, the thickness of the soil covering the buried rainwater pipe shall not be less than 0.7m, the longitudinal slope shall not be less than 0.005°, and the diameter of the rainwater pipe shall not be less than 500mm.

5. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The rainwater inspection wells are arranged at places where the straight-line interval of the rainwater pipe does not exceed 40m, at bends, at places where the slope changes, and at places where the pipe diameter changes.

6. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The diameter of the first-level water inlet hole is not greater than 2 cm, and the net distance between them is not less than 2 cm; The aperture of the secondary water inlet hole is not greater than 1 cm, and the net distance between them is not less than 1 cm. The aperture of the water outlet hole is not greater than 1 cm, and the net distance between them is not less than 1 cm. The distance between the primary water inlet plate and the secondary water inlet plate is not less than 0.5 m, and the distance between the secondary water inlet plate and the water outlet plate is not less than 0.5 m. The large-diameter gravel particle size is 2-3 cm; the small-diameter gravel particle size is 1-2 cm.

7. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The depth of the silt well shall not be less than 0.8m, the width of the well shall not be less than 0.5m, and the depth of the silt area shall not be less than 0.25m.

8. The airport rainwater and sewage diversion treatment system according to claim 1, characterized in that The diameter of the connecting pipe is not less than 300 mm.

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