A method for recycling rainwater on airport slopes

Abstract

The present invention discloses a method for recycling rainwater on an airport slope, comprising the following steps: (1) initial rainfall condition: rainwater is collected by the airport drainage ditch and then flows into the initial rainwater purification mechanism, and then enters the water storage area of ​​the water storage mechanism through the drainage pipe; (2) mid-rainfall condition: rainwater that exceeds the flow capacity of the initial rainwater purification mechanism enters the energy dissipation and impurity interception area of ​​the water storage mechanism through the slope drop ditch set on the airport slope, and then enters the water storage area of ​​the water storage mechanism; (3) late rainfall condition: rainwater that exceeds the storage capacity of the water storage area of ​​the water storage mechanism overflows to the overflow outlet area of ​​the water storage mechanism, and then enters the off-site drainage ditch. The present invention provides a reference operation method for rainwater treatment and disposal under different operating conditions of the airport in the initial, mid-term, late and non-rainfall periods, so that rainwater in the rainfall process can be basically purified, rainwater is collected and stored as a reuse water source, and water resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of airport rainwater recycling, and in particular to a method for recycling airport slope rainwater. Background Art

[0002] Airports occupy a large area. During operation, runways and taxiways are often filled with debris, garbage, dust, and other impurities. During rainfall, rainwater washes over the runways and taxiways, carrying these impurities with it. If this water is collected in the airport's drainage ditches and discharged directly into off-site drainage ditches, it can easily pollute and clog the ditches. Furthermore, as rainfall duration increases, the amount of rainwater gradually increases, necessitating the proper handling of rainwater during the initial, mid-, and final stages of a rainfall event. Summary of the Invention

[0003] The main purpose of the present invention is to provide a method for recycling rainwater on airport slopes.

[0004] To achieve the above objectives, the present invention provides a method for recycling rainwater on an airport slope. An initial rainwater purification mechanism and a water storage mechanism are set up in the airport slope area between the airport drainage ditch and the off-site drainage ditch. The method comprises the following steps:

[0005] (1) Initial rainfall conditions:

[0006] Rainwater is collected in the airport's drainage ditch and then flows into the initial rainwater purification unit. Within the unit, it passes through the still water area, the large-particle filter layer, the small-particle filter layer, and the bearing plate with permeable holes before entering the water storage area. The rainwater in the water storage area then flows through the drainage pipe into the water storage unit's storage area.

[0007] (2) Mid-rainfall conditions:

[0008] Rainwater that exceeds the flow capacity of the initial rainwater purification mechanism enters the energy dissipation and impurity interception area of ​​the water storage mechanism through the slope ditch set up on the airport slope, and then enters the water storage area of ​​the water storage mechanism;

[0009] (3) Working conditions in the late rainfall period:

[0010] Rainwater that exceeds the storage capacity of the water storage area of ​​the water storage organization overflows over the overflow partition wall to the overflow outlet area of ​​the water storage organization and then enters the off-site drainage ditch.

[0011] Furthermore, setting up a rainwater recycling mechanism also includes the following steps:

[0012] Irrigation without rainfall:

[0013] The water distribution pump is started, and the rainwater in the water storage area passes through the water distribution pump, water distribution main pipe, water distribution branch pipe, sprinkler riser in turn to the sprinkler nozzle, and is sprayed to the slope green belt through the sprinkler nozzle.

[0014] Furthermore, the rainwater recycling mechanism includes a water distribution pump, a water distribution main pipe, a water distribution branch pipe, a water spray riser and a sprinkler nozzle. The water inlet of the water distribution pump is connected to the water storage mechanism, and the water outlet is connected to one end of the water distribution main pipe, the other end of the water distribution main pipe is connected to the water distribution branch pipe, one end of the water spray riser is connected to the water distribution branch pipe, and the other end is connected to the sprinkler nozzle.

[0015] Furthermore, the initial rainwater purification mechanism includes a rainwater pool, which is provided with a central herringbone slope and two clean water troughs located on both sides of the central herringbone slope. The two slopes of the central herringbone slope extend to the two clean water troughs respectively. The clean water troughs are provided with a still water area, a large particle filter material layer, a small particle filter material layer, a load-bearing plate and a water storage area from top to bottom, and the load-bearing plate is provided with water-permeable holes.

[0016] Furthermore, the large particle filter material layer uses graded crushed stone with a particle size of 5-10 cm, and the small particle filter material layer uses graded crushed stone with a particle size of 2-5 cm.

[0017] Furthermore, the water storage mechanism includes a water tank, which is provided with an energy dissipation and impurity interception area, a water storage area, a water absorption pit and an overflow water outlet area. The energy dissipation and impurity interception area is located above the water storage area and is connected to the water storage area through vertical water inlet holes and horizontal water inlet holes provided on the pool wall of the energy dissipation and impurity interception area. The water absorption pit is located below the water storage area and the top is connected to the water storage area. The overflow water outlet area is located on the side of the water storage area close to the off-site drainage ditch and an overflow partition wall is provided between the water storage area and the water storage area.

[0018] Furthermore, the energy dissipation and impurity interception area is filled with graded crushed stone with a particle size of 20-30 cm.

[0019] Furthermore, the overflow water area is connected to the off-site drainage ditch and an anti-drilling water net is provided between the two.

[0020] Furthermore, the initial rainwater purification mechanism is connected to the water storage mechanism through a drainage pipe and a side slope drop ditch, and a drop step is provided in the side slope drop ditch.

[0021] Furthermore, the initial rainwater purification mechanism is arranged inside the slope retaining wall at the starting end of the airport slope, and the water storage mechanism is arranged in the flat area at the bottom of the airport slope.

[0022] The beneficial effects of the present invention are embodied in:

[0023] The present invention provides a reference operation method for rainwater treatment and disposal under different working conditions of the airport in the early, middle, late and non-rainfall periods. During rainfall, rainwater washes the airport into the airport drainage ditch, and then enters the early rainwater purification mechanism from the airport drainage ditch. The rainwater is purified in the early rainwater purification mechanism, and then enters the water storage mechanism for storage. Rainwater that exceeds the flow capacity of the early rainwater purification mechanism is purified through the energy dissipation and impurity interception area, and rainwater that exceeds the storage capacity of the water storage mechanism is discharged into the off-site drainage ditch. The design of the present invention can reasonably treat rainwater in the early, middle and late stages of rainfall as the rainfall time and rainfall amount gradually increase, so that the rainwater in the rainfall process can basically be purified, and the rainwater is collected and stored as a recycled water source to save water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the mechanism used in the method for recycling rainwater from an airport slope according to one embodiment of the present invention;

[0025] Figure 2 for Figure 1 Side view of;

[0026] Figure 3 This is a structural diagram of an initial rainwater purification mechanism in one embodiment of the present invention;

[0027] Figure 4 is a cross-sectional view of an initial rainwater purification mechanism in one embodiment of the present invention;

[0028] Figure 5 This is a structural diagram of a water storage mechanism in one embodiment of the present invention;

[0029] Figure 6 is a cross-sectional view of a water storage mechanism in one embodiment of the present invention;

[0030] Figure 7 This is a structural diagram of a rainwater recycling mechanism in one embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the load-bearing plate in one embodiment of the present invention.

[0032] Explanation of reference numerals: 1-airport drainage ditch; 2-initial rainwater purification mechanism; 20-rainwater pool; 21-central herringbone slope; 22-quiet water area; 23-large particle filter layer; 24-small particle filter layer; 25-load-bearing plate; 26-permeable hole; 27-water storage area; 3-slope retaining wall; 4-slope green belt; 5-flat area at the bottom of the slope; 6-off-site drainage ditch; 7-slope waterfall ditch; 71-water drop step; 8-drainage pipe; 9-water storage Mechanism; 90-water storage tank; 91-energy dissipation and impurity interception area; 92-vertical water inlet; 93-horizontal water inlet; 94-water storage area; 95-water suction pit; 96-overflow partition wall; 97-overflow water outlet area; 98-anti-drilling water outlet network; 10-rainwater recycling mechanism; 101-water distribution pump; 102-water distribution main; 103-water distribution branch pipe; 104-water spray riser; 105-sprinkler nozzle; 106-check valve; 107-signal control valve. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 8 .

[0035] The airport slope rainwater recycling method of the present invention comprises setting an initial rainwater purification mechanism 2 and a water storage mechanism 9 in the airport slope area between the airport drainage ditch 1 and the off-site drainage ditch 6, and comprises the following steps:

[0036] (1) Initial rainfall conditions:

[0037] Rainwater is collected by the airport drainage ditch 1 and then flows into the initial rainwater purification unit 2. Within the rainwater purification unit 2, it passes through the still water area 22, the large particle filter layer 23, the small particle filter layer 24, and the bearing plate 25 with permeable holes 26 before entering the water storage area 27. The rainwater in the water storage area 27 then flows through the drainage pipe 8 into the water storage area 94 of the water storage unit 9.

[0038] (2) Mid-rainfall conditions:

[0039] Rainwater that exceeds the flow capacity of the initial rainwater purification mechanism 2 enters the energy dissipation and impurity interception area 91 of the water storage mechanism 9 through the slope drop ditch 7 provided on the airport slope, and then enters the water storage area 94 of the water storage mechanism 9;

[0040] (3) Working conditions in the late rainfall period:

[0041] Rainwater that exceeds the storage capacity of the water storage area 94 of the water storage mechanism 9 exceeds the overflow partition wall 96 and overflows to the overflow outlet area 97 of the water storage mechanism 9, and then enters the off-site drainage ditch 6.

[0042] During rainfall, rainwater washes the airport into the airport drainage ditch 1, and then enters the initial rainwater purification mechanism 2 from the airport drainage ditch 1. The rainwater is purified in the initial rainwater purification mechanism 2, and then enters the water storage mechanism 9 for storage. Rainwater that exceeds the flow capacity of the initial rainwater purification mechanism 2 is purified through the energy dissipation and impurity interception area 91, and rainwater that exceeds the storage capacity of the water storage mechanism 9 is discharged into the off-site drainage ditch 6. The design of the present invention can reasonably process rainwater in the initial, middle and late stages of rainfall as the rainfall time and rainfall amount gradually increase, so that the rainwater in the rainfall process can basically be purified, and provides a reference operation method for rainwater treatment and disposal under different working conditions of the airport in the initial, middle, late and non-rainfall periods.

[0043] The present invention can effectively intercept rainwater from the airport by arranging an initial rainwater purification mechanism and a water storage mechanism, purify the rainwater at the same time, and collect and store the rainwater as a recycled water source. This not only reduces the peak flow of rainwater at the airport and reduces the risk of flood disasters at the airport, but also solves the problem of water used for watering plants in the greening area on the slopes of the airport, saves water resources, and has good environmental and economic benefits.

[0044] In one embodiment, the present invention provides a rainwater recycling mechanism 10, further comprising the following steps:

[0045] Irrigation without rainfall:

[0046] The water distribution pump 101 is started, and the rainwater in the water storage area 94 passes through the water distribution pump 101, the water distribution main pipe 102, the water distribution branch pipe 103, the water spray riser 104 to the sprinkler nozzle 105 in sequence, and is sprayed to the slope green belt 4 through the sprinkler nozzle 105.

[0047] With this design, the rainwater recycling mechanism 10 can be used to water the plants in the airport slope greening area. The rainwater in the water storage mechanism 9 is pumped out by the water distribution pump 101, and the rainwater passes through the water distribution main pipe 102, the water distribution branch pipe 103, and the water spray riser 104 in sequence and enters the sprinkler nozzle 105 for spraying.

[0048] In a specific implementation, the rainwater recycling mechanism 10 includes a water distribution pump 101, a water distribution main pipe 102, a water distribution branch pipe 103, a water spray riser 104 and a sprinkler nozzle 105. The water inlet of the water distribution pump 101 is connected to the water storage mechanism 9, and the water outlet is connected to one end of the water distribution main pipe 102. The other end of the water distribution main pipe 102 is connected to the water distribution branch pipe 103. One end of the water spray riser 104 is connected to the water distribution branch pipe 103, and the other end is connected to the sprinkler nozzle 105.

[0049] In a specific implementation, the water distribution branch pipe 103 , the water spray riser 104 and the sprinkler nozzle 105 of the water recycling mechanism 10 are arranged in the airport slope green belt 4 .

[0050] In one embodiment, a check valve 106 and a signal control valve 107 are provided on the water distribution main 102, and a maintenance stop valve 108 is provided on the water distribution branch 103. In this design, the check valve 106 is used to prevent rainwater from flowing back, and the signal control valve automatically turns on the water distribution pump 101 when it is opened.

[0051] In one embodiment, the initial rainwater purification mechanism 2 includes a rainwater pool 20, which is connected to the airport drainage ditch 1. The rainwater pool 20 is provided with a central herringbone slope 21 and two clean water troughs located on both sides of the central herringbone slope 21. The two slopes of the central herringbone slope 21 extend to the two clean water troughs respectively. The clean water trough is provided with a still water area 22, a large particle filter material layer 23, a small particle filter material layer 24, a load-bearing plate 25 and a water storage area 27 from top to bottom. A water-permeable hole 26 is opened on the load-bearing plate 25. The large particle filter material layer 23 adopts graded gravel with a particle size of 5-10 cm and a thickness of 20 cm. The small particle filter material layer 24 adopts graded gravel with a particle size of 2-5 cm and a thickness of 20 cm. With this design, rainwater discharged from the airport drainage ditch 1 enters the rainwater pool 20, and is guided by the broken surface of the central herringbone slope 21 into two clean water tanks respectively. The rainwater forms the pressure required for filtration in the still water area 22, and then penetrates downward. After being filtered and removed by the large particle filter layer 23 and the small particle filter layer 24, it enters the water storage area 27 through the permeable holes 26.

[0052] In one embodiment, the water storage mechanism 9 includes a water tank 90, which is provided with an energy dissipation and impurity interception area 91, a water storage area 94, a water absorption pit 95 and an overflow water outlet area 97. The energy dissipation and impurity interception area 91 is located above the water storage area 94 and is connected to the water storage area 94 through a vertical water inlet hole 92 and a horizontal water inlet hole 93 provided on the wall of the energy dissipation and impurity interception area 91. The energy dissipation and impurity interception area 91 is filled with graded gravel with a particle size of 20-30 cm. The water absorption pit 95 is located below the water storage area 94 and the top is connected to the water storage area 94. The overflow water outlet area 97 is located on the side of the water storage area 94 close to the off-site drainage ditch 6 and an overflow partition wall 96 is provided between the water storage area 94 and the water storage area 94. With this design, rainwater purified by the initial rainwater purification mechanism 2 enters the water storage area 94 for storage, and unpurified rainwater enters the energy dissipation and impurity interception area 91. The graded gravel in this area can buffer the rainwater and dissipate energy on the one hand, and form a filter layer on the other hand to filter and purify impurities. Afterwards, the rainwater also enters the water storage area 94 through the vertical water inlet hole 92 and the horizontal water inlet hole 93 for storage. When the water volume in the water storage area 94 exceeds, the rainwater passes over the overflow partition wall 96 and enters the overflow outlet area 97, and is then discharged outward.

[0053] In one embodiment, the water storage area 27 of the initial rainwater purification mechanism 2 is connected to the water storage area 94 of the water storage mechanism 9 via a drainage pipe 8. The rainwater pool 20 of the initial rainwater purification mechanism 2 is connected to the energy dissipation and impurity interception area 91 of the water storage mechanism 9 via a slope drop ditch 7 provided on the airport slope. A drop step 71 is provided within the slope drop ditch 7. The drop step 71 serves to buffer rainwater.

[0054] In one embodiment, the overflow water area 97 is connected to the off-site drainage ditch 6 and an anti-drilling water outlet net 98 is provided between the two. This design can not only block animals such as rodents, but also buffer the water flow.

[0055] In one embodiment, the initial rainwater purification mechanism 2 is disposed inside the slope retaining wall 3 at the beginning of the airport slope, and the water storage mechanism 9 is arranged in the flat area 5 at the bottom of the airport slope.

[0056] In specific implementation, the rainwater pool 20 is arranged between the airport drainage ditch 1 and the slope waterfall ditch 7, with a net length of 1-2m along the drainage direction and a net width in the vertical drainage direction of the width of the airport drainage ditch 1 plus 50cm; the width of the central herringbone slope 21 is consistent with that of the airport drainage ditch 1, and the top is connected to the bottom of the airport drainage ditch 1, sloping towards the still water area 22 with a slope of not less than 10%; the still water area 22 is 50cm wide and not less than 30cm deep to ensure a certain filtering water head; the load-bearing plate 25 adopts a sand-based thin plate with a thickness of 10cm, and the diameter of the water-permeable holes 26 opened inside is 1cm. The number of water-permeable holes 26 is determined by calculation based on the initial rainwater treatment volume; the water storage area 27 is 40cm high.

[0057] In a specific implementation, the water storage tank 90 is set at the end of the slope ditch 7, and the energy dissipation and impurity interception area 91 is a fixed gravel layer filled with clean graded gravel with a particle size of 20-30 cm and a thickness of not less than 50 cm.

[0058] The diameter of the vertical water inlet hole 92 and the horizontal water inlet hole 93 is 10 cm, and the number is determined based on the calculation of the airport's flood control rainwater volume; the effective volume of the water storage area 94 is determined based on the amount of rainwater reuse; the suction pit 95 is set at the lowest position in the water storage mechanism 9 pool, with a length and width of 1.0 m and a depth of 1.0 m; the overflow partition wall 96 is 0.5 m high, and the top is level with the lower edge of the vertical water inlet hole 92; the overflow outlet area 97 is 0.5 m wide; the anti-drilling water outlet net 98 adopts a steel mesh structure, and its width is consistent with the width of the off-site drainage ditch 6.

[0059] The water distribution pump 101 is arranged in the suction pit 95 in the water storage mechanism 9. The flow rate is determined according to the sprinkler flow rate calculation, and the lift is determined according to the height difference between the nozzle layout position and the lowest water level of the water storage mechanism 9 plus the total head loss of the water distribution pipeline and the nozzle outflow head; the diameter of the water distribution main pipe 102 is DN50; the diameter of the water distribution branch pipe 103 and the water sprinkler riser 104 is DN25; the sprinkler nozzle 105 adopts a rotary nozzle, which is 1.0m above the ground.

[0060] The diameter of the drainage pipe 8 is DN200 and is buried in the slope green belt 4.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for recycling rainwater from an airport slope, characterized in that: An initial rainwater purification mechanism (2) and a water storage mechanism (9) are provided in an airport slope area between an airport drainage ditch (1) and an off-site drainage ditch (6), comprising the following steps: (1) Initial rainfall conditions: Rainwater is collected by the airport drainage ditch (1) and then flows into the initial rainwater purification mechanism (2). In the rainwater purification mechanism (2), the rainwater passes through the still water area (22), the large particle filter layer (23), the small particle filter layer (24), and the load-bearing plate (25) with water-permeable holes (26) before entering the water storage area (27). The rainwater in the water storage area (27) then enters the water storage area (94) of the water storage mechanism (9) through the drainage pipe (8). (2) Mid-rainfall conditions: Rainwater exceeding the flow capacity of the initial rainwater purification mechanism (2) enters the energy dissipation and impurity interception area (91) of the water storage mechanism (9) through the slope drop ditch (7) provided on the airport slope, and then enters the water storage area (94) of the water storage mechanism (9); (3) Working conditions in the late rainfall period: Rainwater that exceeds the storage capacity of the water storage area (94) of the water storage mechanism (9) overflows over the overflow partition wall (96) and flows into the overflow outlet area (97) of the water storage mechanism (9), and then flows into the off-site drainage ditch (6); The water storage mechanism (9) comprises a water storage tank (90), wherein the water storage tank (90) is provided with an energy dissipation and impurity interception area (91), a water storage area (94), a water absorption pit (95) and an overflow water outlet area (97). The energy dissipation and impurity interception area (91) is located above the water storage area (94) and is connected to the water storage area (94) through a vertical water inlet hole (92) and a horizontal water inlet hole (93) provided on the wall of the energy dissipation and impurity interception area (91). The water absorption pit (95) is located below the water storage area (94) and the top thereof is connected to the water storage area (94). The overflow water outlet area (97) is located on a side of the water storage area (94) close to the off-site drainage ditch (6) and an overflow partition wall (96) is provided between the water storage area (94) and the water storage area (94).

2. The airport slope rainwater recycling method according to claim 1, characterized in that: The rainwater recycling mechanism (10) is provided, further comprising the following steps: Irrigation without rainfall: The water distribution pump (101) is started, and the rainwater in the water storage area (94) passes through the water distribution pump (101), the water distribution main pipe (102), the water distribution branch pipe (103), the water spraying riser (104) in sequence to the sprinkler nozzle (105), and is sprayed to the slope green belt (4) through the sprinkler nozzle (105).

3. The method for recycling rainwater from an airport slope as claimed in claim 2, characterized in that: The rainwater recycling mechanism (10) comprises a water distribution pump (101), a water distribution main pipe (102), a water distribution branch pipe (103), a water spray riser (104) and a sprinkler nozzle (105). The water inlet of the water distribution pump (101) is connected to the water storage mechanism (9), and the water outlet is connected to one end of the water distribution main pipe (102). The other end of the water distribution main pipe (102) is connected to the water distribution branch pipe (103). One end of the water spray riser (104) is connected to the water distribution branch pipe (103), and the other end is connected to the sprinkler nozzle (105).

4. The airport slope rainwater recycling method according to claim 1, 2 or 3, characterized in that: The initial rainwater purification mechanism (2) includes a rainwater pool (20), wherein the rainwater pool (20) is provided with a central herringbone slope (21) and two clean water troughs located on both sides of the central herringbone slope (21), wherein the two slope surfaces of the central herringbone slope (21) extend to the two clean water troughs respectively, wherein the clean water troughs are provided with a still water area (22), a large particle filter material layer (23), a small particle filter material layer (24), a bearing plate (25) and a water storage area (27) in sequence from top to bottom, and a water permeable hole (26) is opened on the bearing plate (25).

5. The method for recycling rainwater from an airport slope as claimed in claim 4, characterized in that: The large particle filter material layer (23) uses graded crushed stone with a particle size of 5-10 cm, and the small particle filter material layer (24) uses graded crushed stone with a particle size of 2-5 cm.

6. The airport slope rainwater recycling method according to claim 1, characterized in that: The energy dissipation and impurity interception area (91) is filled with graded crushed stones with a particle size of 20-30 cm.

7. The airport slope rainwater recycling method according to claim 1, characterized in that: The overflow water outlet area (97) is connected to the off-site drainage ditch (6), and an anti-drilling water outlet net (98) is provided between the two.

8. The method for recycling rainwater from an airport slope according to claim 1, 2 or 3, characterized in that: The initial rainwater purification mechanism (2) is connected to the water storage mechanism (9) through a drainage pipe (8) and a side slope drop ditch (7), and a drop step (71) is provided in the side slope drop ditch (7).

9. The method for recycling rainwater from an airport slope according to claim 1, 2 or 3, characterized in that: The initial rainwater purification mechanism (2) is arranged inside the slope retaining wall (3) at the beginning of the airport slope, and the water storage mechanism (9) is arranged in the flat area (5) at the bottom of the airport slope.

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