Rainwater collection treatment and resource utilization system

Abstract

The utility model discloses a rainwater collection treatment and resource utilization system, which relates to the technical field of rainwater recycling, and comprises a safety diversion well, one side of the safety diversion well is communicated with a rainwater gathering pipe, the other side of the safety diversion well is communicated with an equipment well, and the equipment well comprises a sewage interception hanging basket sedimentation device and a discarding filtering device. The sewage interception hanging basket sedimentation device is communicated with the safety flow dividing well, the flow abandoning and filtering device is communicated with a PP module rainwater collecting pool, the PP module rainwater collecting pool comprises a PP module combined water pool, a lifting pump is arranged in the PP module combined water pool and communicated with a rainwater treatment equipment room, and the rainwater treatment equipment room comprises a self-cleaning filter. The self-cleaning filter is communicated with a backwashing device, the backwashing device is communicated with a glass fiber reinforced plastic clean water tank, the glass fiber reinforced plastic clean water tank comprises a glass fiber reinforced plastic tank body, and a water pump is mounted in the glass fiber reinforced plastic tank body. The rainwater recycling and greening system is suitable for rainwater recycling and greening and road washing, and has the advantages of low cost, high adaptability, economy and greenness.

Description

Technical Field

[0001] The utility model relates to the technical field of rainwater recycling, in particular to a system for collecting, processing and resource utilization of rainwater. Background Art

[0002] During rainfall, rainwater and runoff wash over urban areas. Rainwater is collected by rainwater collection systems. Initial rainwater refers to the rainwater that falls within a short period of time after the onset of rainfall. It typically contains higher levels of impurities and pollutants because this rainwater washes away dust and pollutants from the air and the ground. As rainfall continues, most of the impurities in the air and ground are washed away by the initial rainwater, and the impurity content of the intermediate rainwater decreases.

[0003] Rainwater harvesting can reduce the burden on urban drainage systems and mitigate the risk of flooding. Treated rainwater can be used for groundwater recharge, helping to maintain groundwater levels and protect geological structures. Pollutants are removed from collected rainwater during the treatment process, preventing pollution caused by direct discharge into natural water bodies. Treated rainwater can be used for agricultural irrigation, garden watering, road washing, and other purposes, reducing reliance on tap water or other freshwater resources. For large industrial parks and residential communities, utilizing rainwater can significantly reduce public water costs.

[0004] The existing technologies for rainwater recycling and treatment mainly include pretreatment technology, mainly including coarse screens and fine screens, which are used to remove large particles and suspended matter in rainwater; or water purification technology, biological filtration technology, plant purification systems, and physical and chemical treatment methods, such as flocculation and sedimentation, which are used to remove fine suspended particles and some soluble pollutants. These single treatment methods have poor effects, low utilization rate of treated rainwater, and reduced resource utilization.

[0005] Therefore, the present invention provides a system for collecting, processing and resource utilization of rainwater to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a system for rainwater collection, treatment and resource utilization, including a safety diversion well, one side of the safety diversion well is connected to a rainwater collection pipe, and the other side of the safety diversion well is connected to an equipment well, the equipment well includes a sewage interception hanging basket sedimentation device and a discarded flow filtering device, the sewage interception hanging basket sedimentation device is connected to the safety diversion well, the discarded flow filtering device is connected to a PP module rainwater collection pool, the PP module rainwater collection pool includes a PP module combined water pool, a lifting pump is provided in the PP module combined water pool, the lifting pump is connected to a rainwater treatment equipment room, the rainwater treatment equipment room includes a self-cleaning filter, the self-cleaning filter is connected to a backwashing device, the backwashing device is connected to a fiberglass clear water tank, the fiberglass clear water tank includes a fiberglass tank body, and a water pump is installed in the fiberglass tank body.

[0007] Preferably, the safety diversion well is connected to an overflow pipe, and the overflow pipe is connected to a downstream rainwater well.

[0008] Preferably, the safety diversion well is connected to a water outlet pipe on a side away from the rainwater collecting pipe, the water outlet pipe is connected to the sewage interception hanging basket sedimentation device, and the water outlet pipe is located below the overflow pipe and the rainwater collecting pipe.

[0009] Preferably, a first inspection well is symmetrically arranged in the PP module combined water pool.

[0010] Preferably, the discarded flow filtering device is connected to a water distribution pipe, and the water distribution pipe is connected to the first inspection well.

[0011] Preferably, a second inspection well is provided in the fiberglass reinforced plastic pool.

[0012] Preferably, the rainwater treatment equipment room also includes a rainwater control box.

[0013] Preferably, an impermeable membrane is provided at the bottom of the PP module combined water pool, a geotextile is laid at the bottom of the impermeable membrane, a sand cushion layer is provided at the bottom of the geotextile, a concrete base plate is provided at the bottom of the sand cushion layer, and a plain concrete cushion layer is provided at the bottom of the concrete floor.

[0014] The utility model discloses the following technical effects:

[0015] The rainwater pretreatment adopts a gravity-type treatment system, which plays the role of intercepting rainwater, discarding flow and diverting overflow. After the rainwater is diverted, the load of the subsequent rainwater treatment system and the load of the rainwater reuse treatment system of this system are reduced. The PP modular combination pool adopts a modular design, and the size and shape of the pool can be flexibly configured according to actual needs. It is easy and quick to install, has excellent water storage efficiency, is not easy to adhere to pollutants and bacteria, and reduces operation and maintenance costs.

[0016] Self-cleaning filters can effectively remove suspended matter, particulate impurities and microorganisms in rainwater, ensuring the purity of treated rainwater. While filtering, self-cleaning filters can automatically clean and discharge pollutants to avoid the accumulation of pollutants in the filter, ensuring the continuous output of high-quality water. Automatic cleaning reduces the labor cost and operation and maintenance costs required for filter maintenance and cleaning. Filters of different precisions and sizes can be selected according to different rainwater qualities to meet various water use requirements.

[0017] By collecting rainwater, the burden on urban drainage systems can be reduced and the risk of floods can be lowered. Pollutants are removed from the collected rainwater during the treatment process, avoiding pollution caused by direct discharge into natural water bodies. The treated rainwater can be used for agricultural irrigation, garden irrigation, road cleaning, etc., reducing dependence on tap water or other freshwater resources. For large parks, residential communities, etc., the use of rainwater can significantly reduce public water costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a structural diagram of the utility model sewage interception hanging basket sedimentation device;

[0021] Figure 3 This is a schematic structural diagram of the discarded flow filtering device of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the bottom protective layer of the PP module combined water pool of the utility model;

[0023] In the figure: 1. Safety diversion well; 1-1. Rainwater collection pipe; 1-2. Overflow pipe; 1-3. Outlet pipe; 2. Equipment well; 2-1. Sewage interception basket sedimentation device; 2-2. Abandoned flow filtration device; 3. PP module rainwater collection tank; 3-1. Water distribution pipe; 3-2. PP module combined water tank; 3-3. Lifting pump; 3-4. First inspection well; 4. Rainwater treatment equipment room; 4-1. Self-cleaning filter; 4-2. Backwash device; 4-3. Rainwater control box; 5. FRP clear water tank; 5-1. FRP tank body; 5-2. Water pump; 5-3. Second inspection well; 6. Anti-seepage membrane; 7. Geotextile; 8. Sand cushion; 9. Concrete floor; 10. Plain concrete cushion. DETAILED DESCRIPTION

[0024] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Reference Figures 1-4 As shown, this embodiment provides a system for rainwater collection, treatment and resource utilization, including a safety diversion well 1, one side of the safety diversion well 1 is connected to a rainwater collecting pipe 1-1, and the other side of the safety diversion well 1 is connected to an equipment well 2, the equipment well 2 includes a sewage interception hanging basket sedimentation device 2-1 and a discarded flow filtering device 2-2, the sewage interception hanging basket sedimentation device 2-1 is connected to the safety diversion well 1, the discarded flow filtering device 2-2 is connected to a PP module rainwater collection pool 3, the PP module rainwater collection pool 3 includes a PP module combined water pool 3-2, the PP module combined water pool 3-2 is provided with a lifting pump 3-3, the lifting pump 3-3 is connected to a rainwater treatment equipment room 4, the rainwater treatment equipment room 4 includes a self-cleaning filter 4-1, the self-cleaning filter 4-1 is connected to a backwash device 4-2, the backwash device 4-2 is connected to a glass fiber reinforced plastic clean water pool 5, the glass fiber reinforced plastic clean water pool 5 includes a glass fiber reinforced plastic pool body 5-1, and a water pump 5-2 is installed in the glass fiber reinforced plastic pool body 5-1.

[0027] Rainwater passes through a safety diversion well 1, where impurities larger than 5mm, such as fallen leaves and sand, are removed. After diversion, it enters an equipment well 2, where initial rainwater is discarded and enters a PP modular rainwater collection tank 3. This water then flows through a lift pump 3-3 into a rainwater treatment facility 4, where it passes through a self-cleaning filter 4-1 to remove impurities larger than 50µm. The treated rainwater then enters a fiberglass reinforced plastic clear water tank 5 for landscaping and road washing. A backwash device 4-2 backwashes the PP modular combined pool 3-2 and the self-cleaning filter 4-1. Rainwater in equipment well 2 first passes through a sewage interception basket sedimentation device 2-1 for preliminary removal of suspended solids. The water then enters a discard filter 2-2, where initial rainwater is discarded through a small pipe. Later rainwater enters the PP modular rainwater collection tank 3. This utility model is suitable for rainwater reuse, landscaping, and road washing, offering the advantages of low cost, strong adaptability, economy, and environmental friendliness.

[0028] Furthermore, the self-cleaning filter 4-1 includes a barrel body, a barrel cover, a power barrel, and a filter barrel. During operation, the barrel body, barrel cover, and filter barrel are first connected to each other to filter sewage. Then, the shaft, impeller, fixed sleeve, and brush strips are connected to each other to provide power for the water flow to drive the brush strips to clean the filter screen, achieving energy-saving effects. The self-cleaning filter 4-1 has a processing accuracy of 50μm. When the inlet and outlet pressure difference reaches 0.05MPa, the filtration system automatically performs a backwash process. At the same time, the backwash process can also be controlled by time, that is, the backwash cycle is controlled by achieving a set time. The self-cleaning filter 4-1 has a specification of Q = 15m3 / h, a carbon steel shell, a 304 stainless steel filter element, and a power of 0.75kW.

[0029] Furthermore, the backwashing device 4-2 includes backwashing equipment and backwashing pipes, which backwash the self-cleaning filter 4-1 and the PP module combination pool 3-2 to ensure normal operation of the equipment.

[0030] To further optimize the solution, the safety diversion well 1 is connected with an overflow pipe 1-2, and the overflow pipe 1-2 is connected with the downstream rainwater well.

[0031] To further optimize the solution, outlet pipe 1-3 is connected to the side of safety diversion well 1 away from rainwater collection pipe 1-1. Outlet pipe 1-3 is connected to interception basket sedimentation device 2-1 and is located below overflow pipe 1-2 and rainwater collection pipe 1-1. Rainwater from safety diversion well 1 enters through rainwater collection pipe 1-1 and then enters equipment well 2 through outlet pipe 1-3. Outlet pipe 1-3 is located at a lower elevation than rainwater collection pipe 1-1 and overflow pipe 1-2. When there is excessive rainwater, it flows through overflow pipe 1-2 to the downstream rainwater well. The wastewater discharge pipe of rainwater discard filter device 2-2 has a 0.2m drop from the rainwater collection pipe. To achieve gravity drainage, the wastewater discharge pipe must have a drop of at least 0.2m from the downstream rainwater well to rainwater collection pipe 1-1. If the elevation of the downstream rainwater well does not meet the requirements, water pump 5-2 is required to lift the wastewater for drainage.

[0032] To further optimize the solution, a first inspection well 3-4 is symmetrically arranged within the PP modular combined water tank 3-2. A safety net is installed within the first inspection well 3-4, and a lifting pump 3-3 is located at the bottom of the first inspection well 3-4. The lifting pump 3-3 lifts rainwater from the PP modular rainwater collection tank 3 to the rainwater treatment equipment room 4.

[0033] To further optimize the solution, the abandoned flow filtering device 2-2 is connected to the water distribution pipe 3-1, which is connected to the first inspection well 3-4. The rainwater in the PP module rainwater collection pool 3 enters the PP module combined water pool 3-2 through the water distribution pipe 3-1, and enters the rainwater treatment equipment room 4 through the lifting pump 3-3. The installation of the PP module combined water pool 3-2 is through 90-degree cross stacking on each floor, and the single modules form a whole (the size of the single module is 1000mmx500mmx500mm (H), and the volume is 0.25m 3 ), no need to connect plug-ins, the waterproof wrapping is wrapped around the outside of the PP module combined pool 3-2, so that the entire pool is a closed environment and the interior can accommodate rainwater. The PP module combined pool 3-2 is environmentally friendly, economical, and easy to construct and install.

[0034] To further optimize the solution, a second inspection well 5-3 is provided in the FRP tank body 5-1. The second inspection well 5-3 is used for inspection and maintenance of the FRP tank body 5-1 to ensure the normal operation of the system.

[0035] To further optimize the solution, the rainwater treatment equipment room 4 further includes a rainwater control box 4-3. The rainwater control box 4-3 is used to control the rainwater flow.

[0036] To further optimize the solution, an anti-seepage membrane 6 is installed at the bottom of the PP module combined water pool 3-2. A geotextile 7 is laid at the bottom of the anti-seepage membrane 6. A sand cushion layer 8 is installed at the bottom of the geotextile 7. A concrete base plate is installed at the bottom of the sand cushion layer 8. A plain concrete cushion layer 10 is installed at the bottom of the concrete floor 9. The anti-seepage membrane 6 (HDPE membrane) is in the middle, with a buffer cloth on the top and a geotextile 7 on the bottom, forming a waterproof wrap. This structural layout not only isolates rainwater inside the module from the external environment, but also effectively prevents the middle anti-seepage membrane 6 from direct contact with the module and the external environment, preventing damage. The waterproof wrap is welded by a hot melt machine, with a weld width of about 100mm and a product specification of 1000g / m 3 The outer side of the waterproof wrap is protected by a sand cushion layer 8, a concrete base plate and a plain concrete cushion layer 10 to prevent large-grained sand and gravel in the landfill from scratching the waterproof geotextile 7. The sand cushion layer 8 can also be replaced by wide sand or cooked soil.

[0037] Furthermore, a certain number of backwash pipes need to be laid at the bottom of the PP module combination water pool 3-2. Holes are opened every 0.2m on the backwash pipes, with a hole size of 10 and a cross angle of 45°. The backwash device 4-2 is supplied with water through a raw water backwash pump. The function of backwashing is to flush the bottom of the pool through the raw water backwash pump, so that the sediment deposited at the bottom of the PP module combination water pool 3-2 is stirred to prevent long-term stagnation, the formation of dead mud areas, and water pollution.

[0038] Furthermore, the water supply pipes are PPR pipes with hot-melt connections, and the operating pressure is 0.6 MPa. The rainwater collection pipe in front of the PP modular combined pool 3-2 uses HDPE double-wall corrugated pipe with a socket-and-spigot connection. Water supply pipes with DN < 25 use copper stopcocks, while those with DN > 25 use butterfly valves with an operating pressure of 0.6 MPa. The outlet pipes 1-3 of water pump 5-2 are equipped with pressure gauges, and the inlet and outlet pipes 1-3 use gate valves with an operating pressure of 0.6 MPa. The sewage pump uses a butterfly valve with an operating pressure of 0.6 MPa and a special sewage-specific silencer check valve.

[0039] Furthermore, this system is suitable for burial under greening, and heavy vehicles are prohibited from passing over it. The thickness of the module cover should be no less than 0.5m and no more than 2.5m. Before construction, the ground elevation above the module and the elevation of the rainwater collection pipe 1-1 need to be verified to ensure that the module cover meets the requirements. If the cover exceeds 2.5m, water pump 5-2 needs to be added to increase it.

[0040] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0041] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A system for rainwater collection, processing and resource utilization, characterized by: The invention comprises a safety diversion well (1), one side of the safety diversion well (1) is connected to a rainwater collecting pipe (1-1), the other side of the safety diversion well (1) is connected to an equipment well (2), the equipment well (2) comprises a sewage interception hanging basket sedimentation device (2-1) and a discarded flow filtering device (2-2), the sewage interception hanging basket sedimentation device (2-1) is connected to the safety diversion well (1), the discarded flow filtering device (2-2) is connected to a PP module rainwater collection pool (3), the PP module rainwater collection pool (3) comprises a PP module combined water pool (3 -2), a lifting pump (3-3) is provided in the PP module combined water pool (3-2), the lifting pump (3-3) is connected to a rainwater treatment equipment room (4), the rainwater treatment equipment room (4) includes a self-cleaning filter (4-1), the self-cleaning filter (4-1) is connected to a backwashing device (4-2), the backwashing device (4-2) is connected to a glass fiber reinforced plastic clean water pool (5), the glass fiber reinforced plastic clean water pool (5) includes a glass fiber reinforced plastic pool body (5-1), and a water pump (5-2) is installed in the glass fiber reinforced plastic pool body (5-1).

2. The rainwater collection, processing and resource utilization system according to claim 1 is characterized by: The safety diversion well (1) is connected to an overflow pipe (1-2), and the overflow pipe (1-2) is connected to a downstream rainwater well.

3. The rainwater collection, processing and resource utilization system according to claim 2 is characterized by: A water outlet pipe (1-3) is connected to the side of the safety diversion well (1) away from the rainwater collecting pipe (1-1), the water outlet pipe (1-3) is connected to the sewage interception hanging basket sedimentation device (2-1), and the water outlet pipe (1-3) is located below the overflow pipe (1-2) and the rainwater collecting pipe (1-1).

4. The rainwater collection, processing and resource utilization system according to claim 1 is characterized by: A first inspection well (3-4) is symmetrically arranged in the PP module combined water pool (3-2).

5. The rainwater collection, processing and resource utilization system according to claim 4 is characterized in that: The discarded flow filtering device (2-2) is connected to a water distribution pipe (3-1), and the water distribution pipe (3-1) is connected to the first inspection well (3-4).

6. The rainwater collection, processing and resource utilization system according to claim 1 is characterized by: A second inspection well (5-3) is provided in the glass fiber reinforced plastic pool body (5-1).

7. The rainwater collection, processing and resource utilization system according to claim 1 is characterized by: The rainwater treatment equipment room (4) also includes a rainwater control box (4-3).

8. The rainwater collection, processing and resource utilization system according to claim 1 is characterized by: An anti-seepage membrane (6) is provided at the bottom of the PP module combined water pool (3-2), a geotextile (7) is laid at the bottom of the anti-seepage membrane (6), a sand cushion layer (8) is provided at the bottom of the geotextile (7), a concrete base plate is provided at the bottom of the sand cushion layer (8), and a plain concrete cushion layer (10) is provided at the bottom of the concrete base plate (9).

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