Rainwater comprehensive utilization system for expressway service area and rainwater collection method thereof

Abstract

The invention relates to an expressway service area rainwater comprehensive utilization system, and belongs to the technical field of rainwater collection, treatment and utilization. The device structurally comprises a collecting system and a purifying system, the collecting system is used for collecting rainwater of roofs, roads, squares and greenbelts and enabling the rainwater to enter a rainwater collecting pipe network; the purification system comprises an automatic discarding and filtering device, a rainwater collecting pool, a rainwater processor, a clean water pool, a disinfection device and a reuse water pipe network which are connected in sequence. The system effectively collects rainwater, is used for greening, toilet flushing, fire fighting and the like of a service area, and has certain environmental benefits, social benefits and economic benefits.

Description

Technical Field

[0001] The invention relates to a rainwater comprehensive utilization system in a highway service area and a rainwater collection method thereof, belonging to the technical field of rainwater collection, treatment and utilization. Background Art

[0003] Research on comprehensive rainwater utilization technology in highway service areas can not only effectively alleviate the problem of water shortage, but also reduce surface runoff and drainage pressure, avoid waterlogging, and protect the environment. It has important social, economic and environmental significance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a rainwater comprehensive utilization system for highway service areas, which effectively collects rainwater for greening, flushing toilets, fire fighting, etc. in service areas, and has certain environmental, social and economic benefits.

[0005] To solve the above problems, the specific technical solutions of the present invention are as follows: a highway service area rainwater comprehensive utilization system, including a collection system and a purification system; the collection system includes collecting rainwater from roofs, roads, squares and green spaces, and entering the rainwater collection network; the purification system includes an automatic discard flow filter device, a rainwater collection pool, a rainwater processor, a clear water pool, a disinfection device and a recycled water network connected in sequence.

[0006] When the automatic discard flow filtering device exceeds the set interception water volume, the remaining water enters the rainwater pipe network.

[0007] The sludge accumulated at the bottom of the rainwater collection pool is connected to the sewage pipe network.

[0008] The rainwater collection pool adopts a PP module rainwater collection pool.

[0009] The individual dimensions of the PP module are 1200 mm×600 mm×300 mm.

[0010] The rainwater processor adopts a 3P distributed rainwater processor.

[0011] The disinfection device adopts an ultraviolet disinfector.

[0012] The rainwater collection method of the rainwater comprehensive utilization system of the highway service area includes the following steps: 1) The rainwater collected by the collection system first passes through the automatic flow abandonment filter device to intercept the initial runoff of rainfall. The runoff thickness can be set according to the rainwater quality. When the intercepted water volume reaches the set value, the flow abandonment ends and the rainwater enters the collection pool; 2) A rainwater lifting pump is installed in the rainwater collection pool to lift rainwater to the rainwater processor for treatment. The treated water flows into the clean water tank by gravity; 3) The clean water is pressurized by the clean water pump in the clean water tank and disinfected by the disinfection device before being supplied to the reuse water pipe network for reuse; 4) The discarded rainwater from the automatic discard filter device is discharged into the rainwater pipe network, and the muddy water in the rainwater collection pool is discharged into the sewage pipe network.

[0013] Compared with the prior art, the highway service area rainwater comprehensive utilization system of the present application can avoid the problem of direct discharge and waste of rainwater resources in highway service areas, and collect and process rainwater resources for reuse in service area greening, toilet flushing, fire fighting, etc., which has certain environmental, social and economic benefits.

[0014] This system uses a 3P distributed rainwater processor for rainwater treatment. The equipment integrates sedimentation, filtration, adsorption and other processes. It does not require power and relies on the potential energy formed by the rainwater drop to make the rainwater pass through the processor to complete the treatment process. The 3P distributed rainwater processor does not need backwashing. Depending on the quality of rainwater, it only needs to flush the filter element regularly (usually 1 to 2 years) and replace the filter element every 3 to 5 years. It can reduce rainwater treatment procedures, reduce operating costs, and extend the service life of treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the rainwater comprehensive utilization system in highway service areas. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, a rainwater comprehensive utilization system for highway service areas includes a collection system and a purification system; the collection system collects rainwater from roofs, roads, squares and green spaces and enters the rainwater collection network; the purification system includes an automatic discard flow filtering device, a rainwater collection pool, a rainwater processor, a clear water pool, a disinfection device and a recycled water network connected in sequence.

[0017] When the automatic discard flow filtering device exceeds the set interception water volume, the remaining water enters the rainwater pipe network.

[0018] The sludge accumulated at the bottom of the rainwater collection pool is connected to the sewage pipe network.

[0019] The rainwater collection pool adopts a PP module rainwater collection pool.

[0020] The individual dimensions of the PP module are 1200 mm×600 mm×300 mm.

[0021] The rainwater processor adopts a 3P distributed rainwater processor.

[0022] The disinfection device adopts an ultraviolet disinfector.

[0023] The rainwater collection method according to the rainwater comprehensive utilization system of the highway service area includes the following steps: 1) Rainwater flows through roofs, roads, squares, green areas, and flows into the rainwater collection network. Since the initial rainwater is mixed with a large amount of particulate matter and surface sediment pollutants, in order to reduce the cost of later treatment, the initial rainfall is discharged into the rainwater network. The initial discarded flow thickness of roof rainwater is 2~3mm, and the initial discarded flow thickness of road rainwater is 3~5mm. The initial rainwater discard device is an automatic discard filter device. When the rainwater reaches the discard requirement, the discard electric valve is closed, the water flow in the discard direction stops, and flows to the rainwater PP module collection pool. The water quality after the discard is: CODcr=70~100ma / L; SS=20~40mg / L; chromaticity=10~40 degrees; 2) The single size of the PP module is 1200mm×600mm×300mm. A rainwater lifting pump is installed in the rainwater PP module collection pool to lift rainwater to the 3P distributed rainwater processor. No power is required. The potential energy formed by the rainwater drop allows rainwater to pass through the processor for sedimentation, filtration, and adsorption. A rainwater lifting pump is installed in the rainwater collection pool to lift rainwater to the rainwater processor for treatment. The treated water flows into the clean water tank by gravity. 3) The treated water flows by gravity into the clean water tank; the clean water is pressurized by the clean water pump in the clean water tank and flows through the ultraviolet disinfector to kill bacteria and other microorganisms in the rainwater. The quality of the treated effluent water: the effluent index meets the requirements of the "Technical Specifications for Rainwater Control and Utilization Engineering in Buildings and Residential Areas" (GB50400-2016) for rainwater reuse, namely: road sprinkling: COD ≤ 30mg / L; SS < 10ma / L; greening: COD < 30mg / L; SS < 10mg / L; finally, the water is supplied to the reuse water pipe network for reuse; 4) The discarded rainwater from the automatic discard filter device is discharged into the rainwater pipe network, and the muddy water in the rainwater collection pool is discharged into the sewage pipe network.

Claims

1. A rainwater comprehensive utilization system for highway service areas, characterized by: It includes a collection system and a purification system; the collection system collects rainwater from roofs, roads, squares and green spaces and enters the rainwater collection network; the purification system includes an automatic discard filter device, a rainwater collection pool, a rainwater processor, a clear water pool, a disinfection device and a recycled water network that are connected in sequence.

2. The highway service area rainwater comprehensive utilization system according to claim 1 is characterized by: When the automatic discard flow filtering device exceeds the set interception water volume, the remaining water enters the rainwater pipe network.

3. The highway service area rainwater comprehensive utilization system according to claim 2 is characterized by: The sludge accumulated at the bottom of the rainwater collection pool is connected to the sewage pipe network.

4. The highway service area rainwater comprehensive utilization system according to claim 3 is characterized by: The rainwater collection pool adopts a PP module rainwater collection pool.

5. The highway service area rainwater comprehensive utilization system according to claim 4 is characterized by: The individual dimensions of the PP module are 1200 mm×600 mm×300 mm.

6. The highway service area rainwater comprehensive utilization system according to claim 1 is characterized by: The rainwater processor adopts a 3P distributed rainwater processor.

7. The highway service area rainwater comprehensive utilization system according to claim 1 is characterized by: The disinfection device adopts an ultraviolet disinfector.

8. The rainwater collection method of the highway service area rainwater comprehensive utilization system according to claim 3 is characterized in that The following steps are involved: 1) The rainwater collected by the collection system first passes through the automatic flow abandonment filter device to intercept the initial runoff of rainfall. The runoff thickness can be set according to the rainwater quality. When the intercepted water volume reaches the set value, the flow abandonment ends and the rainwater enters the collection pool; 2) A rainwater lifting pump is installed in the rainwater collection pool to lift rainwater to the rainwater processor for treatment. The treated water flows into the clean water tank by gravity; 3) The clean water is pressurized by the clean water pump in the clean water tank and disinfected by the disinfection device before being supplied to the reuse water pipe network for reuse; 4) The discarded rainwater from the automatic discard filter device is discharged into the rainwater pipe network, and the muddy water in the rainwater collection pool is discharged into the sewage pipe network.

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