CN105201068B - Rainwater recycling treatment process - Google Patents

Abstract

The invention relates to a rainwater recycling treatment process, which comprises the following steps: firstly, intercepting and filtering rainwater; step two, discarding and filtering; step three, settling a catchment well: the rainwater forms sediment in the water collection well and the sediment is discharged by a sewage pump; step four, rainwater flowing out of a water outlet of the water collecting well enters a reservoir for storage; step five, filtering by adopting a filter; and step six, storing in a clean water tank. The invention not only realizes the storage of rainwater through the reservoir, but also realizes the purification treatment of rainwater through a plurality of steps of sewage interception and filtration, flow abandoning and filtration, water collection and sedimentation of a water collection well, filtration and the like, stores the treated clean water in the clean water tank for later clean utilization, realizes the comprehensive utilization effect of rainwater, and is beneficial to the rainwater to become important resource for sustainable development, therefore, the invention can be widely applied to the field of rainwater resource utilization.

Description

Rainwater Resource Treatment Process

technical field

The invention relates to a rainwater collection and treatment process, in particular to a rainwater resource treatment process.

Background technique

For a long time, whether it is residential development or the construction of public infrastructure such as roads, squares, and underground pipe networks, most of them have been hardened with reinforced concrete, which has completely changed the original ecology of the surface, increased rainwater runoff, and led to the loss of rainwater resources. The system is disordered, and geological disasters occur from time to time, which intensifies urban waterlogging, smog, and the heat island effect. Once it rains for a long time, if the sewers cannot drain the rainwater in a timely and smooth manner, serious urban waterlogging will occur.

In order to alleviate the problem of urban water environment, the construction of sponge city is an ideal choice. Sponge city is like a sponge, which absorbs, stores, infiltrates, and purifies water when it rains, and releases and utilizes the stored water when needed. It combines natural methods and artificial measures, and under the premise of drainage and flood safety, To maximize the accumulation, infiltration and purification of rainwater in urban areas, and to promote the utilization of rainwater resources and the protection of the ecological environment.

CN104532938 A (published on April 22, 2015) discloses a rainwater storage system, which takes the community as a unit and includes an open-air greening system constructed on the roof of a building, a plurality of ecological filters and 1- 2 landscape reservoirs, community parking lots, squares and ecological grass ditch systems beside community roads. The characteristics of this rainwater storage system: by constructing a greening system on the roof of the building, setting up rainwater collection tanks, ecological filters, ecological grass ditch systems, etc. on the ground, the drainage of rainwater is dominated by infiltration and groundwater replenishment.

Although the above-mentioned rainwater storage system in the prior art can meet certain needs, it still has certain defects: for example, its purpose is only to allow rainwater to infiltrate and replenish the ground, and it only solves the problem of infiltration, and cannot simultaneously realize the rainwater storage system. Purification and utilization, such as washing vehicles, green watering, flushing toilets and other clean utilization.

Therefore, there is a need for further improvement and optimization of the rainwater collection and treatment process and treatment system. This is not only a problem that city managers need to solve urgently, but also the motivation and starting point for the completion of the present invention.

Contents of the invention

In order to overcome the above-mentioned technical problems existing in the prior art, the present inventor has completed the present invention after conducting a lot of in-depth research.

The present invention is realized through the following technical solutions, a rainwater resource treatment process, comprising the following steps:

Step 1, intercepting and filtering the rainwater;

Step 2, discarding flow and filtering;

Step 3, sedimentation in the catchment well: the rainwater forms sediment in the catchment well and uses the sewage pump to discharge the sediment;

Step 4, the rainwater flowing out from the outlet of the catchment well enters the reservoir for storage;

Step 5, using a filter to filter;

Step six, clean water pool storage.

Preferably, the following steps are also included between step 4 and step 5: part of the rainwater is filtered through the backfill soil layer, gravel layer, geotextile permeable layer and coarse sand cushion, and infiltrated, and the excess rainwater is passed through the infiltration well and The permeation pipe enters the storage tank for storage, and part of the rainwater is filtered and infiltrated through the backfill soil layer, gravel layer, geotextile permeable layer and coarse sand cushion, and the excess rainwater enters the water storage through the permeation module and permeation pipe pool for storage.

Preferably, in Step 5, the water purifying agent is firstly added for flocculation and then filtered; more preferably, the water purifying agent is added to the filter through a pipeline mixer.

Preferably, the clean water tank is supplied with clean water by using a clean water supply pump; more preferably, the clean water supplied by the clean water supply pump is first sterilized by an ultraviolet disinfection device and then discharged to the water point.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention not only realizes the storage of rainwater through the reservoir, reduces the surface flow of rainwater and the pressure of the municipal rainwater pipe network, but also through the interception and filtration of rainwater, the waste flow filtration, The steps of catchment sedimentation and filtration of the catchment well realize the purification treatment of rainwater, and store the treated clean water in the clean water pool for later cleaning and utilization, realizing the comprehensive effect of "storage, purification and use" of rainwater, Combined with the rainwater infiltration system, the comprehensive effects of "seepage, stagnation, storage, purification, and use" can be realized, which is conducive to rainwater becoming an important resource for sustainable urban development.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is the schematic diagram of the principle of the first embodiment of the present invention;

Fig. 2 is a partial structural schematic diagram in Fig. 1;

Fig. 3 is another part of the structural schematic diagram in Fig. 1;

Fig. 4 is a schematic diagram of the principle of another embodiment of the present invention;

Fig. 5 is the enlarged schematic view of the permeation well and permeation pipe in Fig. 4;

Fig. 6 is the enlarged schematic diagram of permeation module and permeation pipe in Fig. 4;

Fig. 7 is the schematic front view of the structure of the pollution intercepting and filtering device in the above two embodiments;

Fig. 8 is a schematic top view of the structure of the pollution intercepting and filtering device in the above two embodiments;

Fig. 9 is a schematic front view of the structure of the discarded flow filtering device in the above two embodiments;

Fig. 10 is a schematic top view of the structure of the discarded flow filtering device in the above two embodiments.

In the figure: 1. Sewage intercepting and filtering device; 2. Discarding flow filtering device; 3. Convergence well; 4. Reservoir; 5. Water outlet well; 6. Water inlet of outlet well; 7. Water outlet of catchment well; Lifting pump; 9. Sewage pump; 10. Pipeline; 11. Filter; 12. Water purification agent adding device (contains water purification agent); 13. Ultraviolet disinfection device; 14. Pressure gauge; 15. Pressure tank; 16 1. Clear water supply pump; 17. Clear water pool; 18. Overflow outlet; 19. Vegetation; 20. Ladder; 21. Pretreatment room; 22. Geotextile; 23. Assembled rainwater storage module; 24. Concrete platform; 25. Pipeline mixer; 26. Purification room; 27. Backfill soil layer; 28. Infiltration well; ; 34, rainwater pool; 35, infiltration module.

detailed description

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example 1

This embodiment relates to a rainwater resource management system, as shown in Figure 1-3, including: a sewage intercepting filter device 1, a waste flow filter device 2, a water storage tank 4, a water purification agent adding device 12, a filter 11, Clear water pool 17; Reservoir 4 is made up of assembled rainwater storage module 23, and assembled rainwater storage module 23 adopts polypropylene material to make porous square module, convenient transportation and installation, the rainwater storage module assembled together can not only Store water, and can also support a certain gravity, prevent the reservoir from collapsing; the reservoir 4 is provided with a catchment well 3 and a water outlet well 5; The rainwater lifting pump 8, the upper part of the catchment well 3 is provided with the catchment well outlet 7, and the outlet well is provided with the outlet well water inlet 6; the sewage interception filter device 1 and the waste flow filter device 2 are connected in the pretreatment room 21, and the pretreatment A ladder 20 is provided in the treatment room 21, and the ladder 20 is convenient to enter the pretreatment room 21 to maintain the sewage interception filter device 1 and the waste flow filter device 2, and the waste flow filter device 2 is connected to the water intake of the catchment well 3 through the pipeline 10 (the ratio of the diameter of the catchment well to the length of the reservoir is 1:15, the ratio of the diameter of the outlet of the catchment well to the diameter of the catchment well is 1:5, and the ratio of the diameter of the inlet of the catchment well to the outlet of the catchment well is 3:1, the location of the outlet of the catchment well is lower than the height of the reservoir, and the location of the inlet of the catchment well is higher than the height of the reservoir, so as to ensure the drop between the location of the inlet of the catchment well and the location of the outlet of the catchment well No less than 20cm, the present embodiment adopts 20cm, the number of the catchment well water inlet is one, and the number of the catchment well water outlet is three and evenly distributed on the opposite side of the catchment well water inlet), because the catchment well 3 and its With the special design of the water inlet and outlet, the viscous impurities in the rainwater will settle and stay at the bottom of the water collection well 3 to form sediment during the movement from the water inlet of the water collection well 3 to the water outlet, and then pass through the sewage in the water collection well 3 The pump 9 can easily remove these viscous impurities, not only can prevent these viscous impurities from directly entering and settling in the assembled rainwater storage module 23 of the reservoir, causing the gap of the assembled rainwater storage module 23 to be blocked, and cleaning is very troublesome. Affect the water storage effect of assembled rainwater storage module 23, and also can prevent the filter 11 of these viscous impurity from clogging up downstream process, be conducive to the purification efficiency of rainwater); Connected, water purification agent adding device 12 adds water purification agent to filter 11 through pipeline mixer 25, and water purification agent can adopt flocculant, such as polyaluminum chloride and aluminum sulfate; Clean water supply pump 16 is arranged in the clear water pool 17, The outlet of the clear water supply pump 26 is connected with an ultraviolet sterilizer 13, and the pipeline between the clear water supply pump 16 and the ultraviolet sterilizer 13 is provided with a pressure gauge 14 and a surge tank 15; 24 and the geotextile 22 of inner layer are formed, and there is vegetation 19 for greening on the top surface of reservoir 4; Filter 11, water purification agent adding device 12, ultraviolet disinfection device 13, pressure These five parts of table 14 and surge tank 15 are all arranged in purification room 26; overflow port 18 is set on the top of clear water pool 17, prevents clear water pool from being too full; Wherein the polluting filter device that adopts is the inventor's original double cylinder type (As shown in Figure 7-8), the discarded flow filter device is a split flow (as shown in Figure 9-10) created by the inventor.

This embodiment not only realizes the storage of rainwater through the storage tank, but also realizes the purification treatment of rainwater through the steps of sewage interception filtration, waste flow filtration, water collection and precipitation of catchment wells, flocculation filtration, etc., and the treated clean water is stored It is convenient for later cleaning and utilization in the clear water pool, and realizes the comprehensive effect of "storage, purification, and use" of rainwater, which is conducive to rainwater becoming an important resource for sustainable urban development.

Example 2

This embodiment relates to a rainwater resource treatment process, which consists of the following steps, and adopts the principle and equipment as shown in Embodiment 1:

Step 1, intercepting and filtering the rainwater;

Step 2, discarding flow and filtering;

Step 3, sedimentation in the catchment well: the rainwater forms sediment in the catchment well and uses the sewage pump to discharge the sediment;

Step 4, the rainwater flowing out from the outlet of the catchment well enters the reservoir for storage;

Step 5, adding the water purifying agent polyaluminum chloride into the filter through the pipeline mixer to filter, and the weight ratio of the water purifying agent to rainwater is 1:100;

Step 6, enter the clean water pool for storage, and use a clean water supply pump to sterilize the clean water in it through an ultraviolet disinfection device and then supply it to the water point.

In this embodiment, the purification of rainwater is realized through steps such as sewage interception filtration, waste flow filtration, water collection and precipitation in catchment wells, and flocculation filtration, especially the quick and easy removal of sticky substances in rainwater, and finally the treated clean water It is stored in a clean water pool for later cleaning and utilization, and realizes the comprehensive effect of "storage, purification, and use" of rainwater, which is conducive to rainwater becoming an important resource for sustainable urban development.

Example 3

This embodiment relates to a rainwater resource management system. The difference between this embodiment and Embodiment 1 is that, as shown in Figure 4-6, it also includes a permeation well 28 and a permeation module 35. 30 connection, the end of the permeation well 28 communicates with the upper part of the outlet well 5 through the permeation tube 30, and the permeation module 35 also communicates with the upper part of the outlet well 5 through the permeation tube 30, and the permeation well 28 and the permeation tube 30 are both provided with the lower infiltration hole 29 , the permeation pipe 30 between the permeation wells 28 rises gradually from the water inlet end to the water outlet end and presents an inclined posture (the height of the water inlet of the permeation well 28 is higher than the height of the water outlet of the permeation well 28, that is, the height of the permeation well 28 Water inlet is positioned at the top of the water outlet of infiltration well 28); Permeation well 28, infiltration pipe 30, permeation module 35 are surrounded by gravel layer 31 successively from inside to outside (crushed stone can adopt the stone that paves asphalt road usefulness, also can adopt cobblestone), geotextile permeable layer 32,50mm thick coarse sand cushion 33 is formed, the outer top of coarse sand cushion 33 can also be provided with backfill soil layer 27, and the upper surface of backfill soil layer 27 can be provided with vegetation to do greening, Some rainwater pools 34 for collecting rainwater can also be provided. The rainwater in the rainwater pools 34 enters the infiltration module 35 through infiltration. The infiltration module 35 can be made of a porous block-shaped module made of polypropylene material, which is convenient for transportation and installation.

The rainwater resource management system provided in this embodiment not only realizes the storage of rainwater through the storage tank, but also realizes the purification of rainwater through the original sewage interception filtration, waste flow filtration, water collection well precipitation, flocculation filtration and other steps. The treated clean water is stored in the clean water pool for later cleaning and utilization, and the effects of rainwater storage, purification and use are realized, and the infiltration of rainwater through the installation of permeation pipes, permeation wells and permeation modules, Moreover, the periphery of the infiltration well and the infiltration pipe is covered with gravel, geotextile and coarse sand, and the rainwater is filtered through the gravel, geotextile and coarse sand, so as to play the functions of rainwater filtration and rainwater retention; after infiltration and retention, excess rainwater is recycled Conduct diversion to the storage tank for storage, so that through the comprehensive function of infiltration wells, infiltration pipes, storage tanks, infiltration modules, etc., not only the infiltration and replenishment of groundwater is realized, but also the retention of surface rainwater is realized, and the flow rate of rainwater is reduced. slow down, which is conducive to the infiltration of rainwater, and reduces the surface flow of rainwater and the pressure on the municipal rainwater pipe network. Therefore, the rainwater resource management system provided by this embodiment fully realizes the infiltration, stagnation, storage, purification, and use of rainwater. The effect is conducive to rainwater becoming an important resource for urban sustainable development and improving the ecological environment.

Example 4

This embodiment relates to a rainwater resource treatment process, which consists of the following steps, and adopts the principle and equipment as shown in Embodiment 3:

Step 1, intercepting and filtering the rainwater;

Step 2, discarding flow and filtering;

Step 3, sedimentation in the catchment well: the rainwater forms sediment in the catchment well and uses the sewage pump to discharge the sediment;

Step 4: The rainwater flowing out from the outlet of the catchment well enters the reservoir for storage, while part of the rainwater is filtered and infiltrated through the backfill soil layer, gravel layer, geotextile permeable layer and coarse sand cushion, and the excess rainwater passes through The infiltration well and the infiltration pipe enter the storage tank for storage, and part of the rainwater is filtered and infiltrated through the backfill soil layer, gravel layer, geotextile infiltration layer and coarse sand cushion, and the excess rainwater passes through the infiltration module and the infiltration pipe Access to cisterns for storage;

Step 5, adding the water purifying agent aluminum sulfate into the filter through the pipeline mixer to filter, and the weight ratio of the water purifying agent to rainwater is 1:200;

Step 6, enter the clean water pool for storage, and use a clean water supply pump to sterilize the clean water in it through an ultraviolet disinfection device and then supply it to the water point.

In this embodiment, the purification treatment of a part of the rainwater is realized through steps such as sewage interception filtration, waste flow filtration, water catchment sedimentation in catchment wells, and flocculation filtration, and the treated clean water is stored in a clear water pool for later cleaning and utilization. The infiltration pipe, the infiltration well and the infiltration module play the infiltration role of rainwater; and the periphery of the infiltration well and the infiltration pipe is covered with gravel, geotextile and coarse sand, and the rainwater is filtered through the gravel, geotextile and coarse sand to play a role in infiltration. The function of rainwater filtration and rainwater retention; after infiltration and retention, the excess rainwater is diverted to the storage tank for storage. In this way, through the comprehensive effects of infiltration wells, infiltration pipes, storage tanks, and infiltration modules, not only the groundwater Infiltration and replenishment, and the retention of surface rainwater is realized, the flow rate of rainwater is slowed down, which is conducive to infiltration of rainwater, and reduces the surface flow of rainwater and the pressure of municipal rainwater pipe network. Therefore, the rainwater resource treatment process provided in this embodiment The comprehensive effect of "seepage, stagnation, storage, purification and use" of rainwater has been fully realized, which is conducive to rainwater becoming an important resource for sustainable urban development and improving the ecological environment.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims (2)

1. A rainwater recycling treatment process is characterized in that, comprising the following steps: Step 1, intercepting and filtering the rainwater; Step 2, discarding flow and filtering; Step 3, catchment well sedimentation: rainwater forms sediment in the catchment well and uses the sewage pump to discharge the sediment. The ratio of the diameter of the catchment well to the length of the reservoir is 1:15, and the diameter of the outlet of the catchment well is the diameter of the catchment well The ratio of the water inlet of the catchment well to the outlet of the catchment well is 3:1, the outlet of the catchment well is lower than the height of the reservoir, and the inlet of the catchment well is higher than The height is high, ensuring that the drop between the water inlet of the catchment well and the outlet of the catchment well is 20cm, the number of the water inlet of the catchment well is one, and the number of outlets of the catchment well is three and evenly distributed in the catchment well the opposite side of the water inlet; Step 4, the rainwater flowing out from the outlet of the catchment well enters the reservoir for storage; Step 5, adding water purifying agents for flocculation and then filtering with a filter, the water purifying agents are added to the filter through a pipeline mixer; Step 6, storing in the clean water pool, the clean water pool supplies the clean water in the clean water pool by using a clean water supply pump, and the clean water supplied by the clean water supply pump is sterilized by an ultraviolet disinfection device and then discharged to the water point. 2. The rainwater resource treatment process as claimed in claim 1, characterized in that, between step 4 and step 5, the following steps are also included: a part of rainwater passes through backfill soil layer, crushed stone layer, geotextile permeable layer and rough After the sand cushion is filtered and infiltrated, the excess rainwater enters the reservoir through the infiltration well and the infiltration pipe for storage, and part of the rainwater is filtered through the backfill soil layer, gravel layer, geotextile permeable layer and coarse sand cushion. After infiltration, excess rainwater passes through the infiltration module and infiltration pipe into the storage tank for storage.