CN205204913U - A stealthy ecological filtering pond system that is used for initial stage rainwater to collect retrieval and utilization - Google Patents

Abstract

The utility model discloses an invisible ecological filter system for collecting and reusing initial rainwater, which comprises a water collection well, a water storage well and an ecological filter, and the water collection well, the water storage well and the ecological filter are sequentially arranged on the slope protection from top to bottom , the bottom of the water collection well is provided with a water inlet connected to the bottom of the water storage well, the water storage well is provided with an aeration device, and the ecological filter is provided with crushed stone packing layer, zeolite packing layer, fine gravel packing layer and sand packing layer from bottom to top. In the soil layer, slope protection plants are arranged on the sand layer, a water distribution pipe connected to the water storage well is arranged in the sand layer, and a water outlet connected to the gravel filling layer is arranged on the ecological filter. The utility model rationally utilizes artificial slope protection, can effectively purify rainwater, has no secondary pollution, and is easy to operate, and can directly integrate the purified rainwater with the lake water environment, and can lift the lake water to the ecological filter system by using a water pump in the non-flood season ex situ purification treatment.

Description

Invisible Ecological Filter System for Primary Rainwater Harvesting and Reuse

technical field

The utility model relates to the field of environmental ecological purification, in particular to an invisible ecological filter tank system for collecting and reusing initial rainwater.

Background technique

As a high-quality natural resource, rainwater is easy to collect and use, and plays an important role in regulating and replenishing urban water resources and improving urban natural ecosystems. The ecological treatment of rainwater is of great significance to supplementing urban water use. 99% of urban construction in my country adopts the fast drainage mode. When rainwater falls on the hardened ground, more than 80% of the total rainfall needs to be drained through pipes. This kind of construction mode is likely to cause waterlogging every time it rains. Now, in order to improve this traditional rainwater treatment method, the country has proposed the goal of "sponge city" construction. "Sponge city" means that the city can adapt to the environment like a sponge. It has good "elasticity" in terms of changing and responding to natural disasters. When it rains, it absorbs, stores, infiltrates, and purifies water, and "releases" the stored water and uses it when needed. The treated rainwater resources can be widely used in urban landscapes, such as landscaping irrigation, urban landscape water replenishment, etc., and can also be used in all aspects of urban residents' lives such as firefighting, toilet flushing, and car washing.

However, the pollution of incipient rainwater has gradually received widespread attention at home and abroad. The initial rainwater has a scouring effect. Both the air and the ground in the city contain a large amount of pollutants. In the early stage of rainfall, a large amount of polluting gases in the air are dissolved in the rainwater. etc., making the early rainwater contain a large amount of organic matter, pathogens, heavy metals, grease, suspended solids and other pollutants. With the movement of rainwater runoff, it also causes rainwater runoff pollution, which leads to the gradual deterioration of urban water environment, and the necessity of ecological utilization of urban rainwater becomes more prominent.

In order to better deal with the pollution of initial rainwater, ecological filter technology came into being. This technology is an ecosystem with unique structure and powerful functions composed of water, permanent or intermittent water-saturated substrates and aquatic organisms. It is useful for protecting biodiversity, improving the natural environment, protecting and purifying Water sources play an important role.

Utility model content

The purpose of the utility model is to provide an invisible ecological filter system for collecting and reusing initial rainwater for the above-mentioned problems in the prior art.

Above-mentioned purpose of the utility model is realized through the following technical solutions:

The invisible ecological filter system for initial rainwater collection and reuse includes water collection wells, water storage wells and ecological filters. The bottom of the tank is provided with a water inlet connected to the bottom of the water storage well, and an aeration device is provided in the water storage well, and a crushed stone packing layer, a zeolite packing layer, a fine gravel packing layer and a sandy soil layer are arranged in the ecological filter from bottom to top. Slope protection plants are arranged on the sandy soil layer, water distribution pipes connected with the water storage well are arranged in the sandy soil layer, and water outlets connected with the gravel packing layer are arranged on the ecological filter.

The bottom of the above-mentioned water collection well is provided with a settlement layer, the top of the water collection well is provided with a piston filter, the side wall of the water collection well is provided with an overflow port communicating with the water storage well, and the piston filter is a stainless steel mesh box. The stainless steel net cage is suspended in the water collection well through a steel wire rope, and the bottom of the stainless steel net cage is higher than the overflow port.

The above-mentioned sedimentation layer is a mixed filler of vermiculite and zeolite, and the particle diameters of vermiculite and zeolite are selected to be between 5-10mm in diameter.

As mentioned above, the water inlet end of the water distribution pipe is higher than the water outlet end of the water inlet, and the water inlet end of the water distribution pipe is lower than the overflow port.

An anti-seepage layer is arranged under the above-mentioned water collection well, water storage well and ecological filter.

The above-mentioned aeration device is arranged on the inner wall of the water storage well.

The above-mentioned water distribution pipe is 10-20cm away from the surface layer of the fine gravel packing layer.

The particle size of the above-mentioned fine gravel packing layer is 5-10mm; the particle size of the zeolite packing layer is 10-16mm; the particle size of the crushed stone packing layer is 16-30mm.

The aforementioned slope protection plants are one or more of ryegrass, reed, cattail, water onion and canna.

Compared with the prior art, the utility model has the following advantages:

It is mainly designed for the high content of pollutants in the initial rainwater, and solves the non-environmental protection method of discarding the initial rainwater in the past; reasonable use of artificial slope protection, effectively avoiding the limitation of land resources, has a certain landscape effect; the use of ecological filters The technology can effectively purify rainwater without secondary pollution; the entire ecological filter system is easy to operate, and the later maintenance operation is convenient, which effectively reduces the burden of manual maintenance; the site selection near the lake can directly use the purified rainwater with the The lake water environment is integrated, and the lake water can be pumped to the ecological filter system for ex-situ purification during the non-flood season.

Description of drawings

The sectional view of Fig. 1 ecological filter tank system;

Figure 2 Schematic diagram of water distribution pipes.

In the figure: 1-collection well, 2-piston filter, 3-sedimentation layer, 4-water inlet, 5-anti-seepage layer, 6-storage well, 7-overflow port, 8-aeration device, 9 -water distribution hole, 10-water distribution pipe, 11-sand layer, 12-slope protection plant, 13-fine gravel packing layer, 14-zeolite packing layer, 15-gravel packing layer, 16-water blocking wall, 17-exit Shuikou, 18-ecological filter.

detailed description

The technical scheme of the utility model is further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the utility model is built under the artificial slope protection and is used to treat the initial rainwater invisible ecological filter system. The ecological filter first needs to select the slope protection of the natural lake for earthwork excavation. After the earthwork excavation is completed , first lay the anti-seepage layer 5, the anti-seepage layer 5 uses two layers of long-fiber geotextiles and an anti-seepage membrane between the two layers of long-fiber geotextiles, the anti-seepage membrane can be selected from Changsha Jianyi New Material Co., Ltd. Vinyl barrier membrane.

The anti-seepage membrane is set between two layers of long-fiber geotextiles, which can effectively prevent seepage. The construction of the water collection well 1 and the water storage well 6 are all made of concrete materials. The size of the water collection well 1 and the water storage well 6 should be based on the local rainfall. For setting, the initial rainwater generally refers to the rainfall 15 minutes before the rainfall, and the water storage capacity of the water storage well 6 should be higher than that of the water collection well 1. The water collection well 1 contains a piston filter 2 and a sedimentation layer 3, and the piston filter 2 can It is a stainless steel net cage without a cover. The size of the stainless steel net cage can be designed according to the diameter of the water collection well 1. The mesh diameter of the stainless steel net cage is designed to be 0.3mm, which has high precision and can effectively intercept the garbage and water carried by the initial rainwater washing. For fine particles, hang the piston filter 2 in the water collection well 1 with a wire rope. The bottom of the piston filter 2 should be higher than the overflow port 7. When it is lifted up to the head of the water collection well, the intercepted substances can be cleaned up, which is convenient for later treatment and effectively reduces the burden of manual maintenance in the later period. The sedimentation layer 3 is a mixed filler of vermiculite and zeolite, wherein the particle size of the vermiculite and zeolite is between 5-10mm, mixed in a ratio of 1:1 by mass; the height of the sedimentation layer 3 is 30% of the height of the water collection well 1 -40%, the sedimentation layer 3 can carry out primary purification to the initial rainwater; the packing layer of the ecological filter includes a fine gravel packing layer 13, a zeolite packing layer 14 and a crushed stone packing layer 15 arranged vertically from top to bottom, the fine The gravel packing layer 13, the zeolite packing layer 14 and the crushed stone packing layer 15 are arranged sequentially according to the thickness ratio of 2:3:5, wherein the particle size of the fine gravel in the fine gravel packing layer 13 is between 5-10mm The particle size of the zeolite in the zeolite packing layer 14 is between 10-16 mm, and the particle size of the crushed stone in the crushed stone packing layer 15 is between 16-30 mm. A sandy soil layer 11 is laid above the filling layer, and the sandy soil layer 11 is a mixture of fine sand and soil, which can provide a good living environment for plants, and then plant slope protection plants 12, and the slope protection plants adopt a variety of suitable plants for mixed planting, which not only beautifies The environment can also prevent soil erosion in slope protection. The slope protection plants are mixed and matched with various plants such as ryegrass, reeds, cattails, water onions, and cannas. The water blocking wall 16 is a concrete structure, which can prevent rainwater from penetrating and fixing artificial slope protection. A water-blocking wall 16 is built at the lowermost end of the artificial slope protection to prevent sand and gravel from falling and purified rainwater from penetrating. The water distribution pipe 10 is arranged on the bottom of the sandy soil layer 11, 10-20cm (preferably 15cm) away from the fine gravel packing layer 13 surface layers, and is provided with uniform water distribution holes in the direction vertically facing the fine gravel packing layer 13, and the water distribution holes Diameter can be properly set according to rainfall, keeps rainwater vertically descending, and the water inlet end of water distribution pipe 10 will be higher than the water outlet end of water inlet 4.

The ecological filter system chooses a location close to the waters of the lake, which is conducive to reducing non-point source pollution entering the lake and is conducive to the discharge of rainwater after treatment. At the same time, the lake water can be pumped to the ecological filter for purification during the non-flood season.

Rainwater enters the collection well 1 through the rain collection channel, flows through the piston filter 2, removes fine gravel and garbage, and then enters the sedimentation layer 3 for primary purification. After the rainfall lasts for a period of time, the rainwater in the collection well 1 will When the height of the overflow port 7 is reached, the rainwater will directly enter the storage well 6 through the overflow port 7, and the initial rainwater passing through the settlement layer 3 will enter the storage well 6 through the water inlet 4. When the water storage reaches the position of the water distribution pipe 10 , rainwater begins to enter the water distribution pipe, and enters the ecological filter system through the evenly distributed water distribution outlet 9 (as shown in Figure 2) on the water distribution pipe, and after a certain hydraulic retention time, it is discharged to the natural lake water body through the water outlet 17; During the non-flood season, the water in the lake can be pumped to the water storage well 6 by using the water pump, so that it can pass through the ecological filter system, so as to achieve the goal of purifying the water body.

Construction method of invisible ecological filter system for initial rainwater collection and reuse:

1. Select artificial slope protection, and the optimal choice is a location closer to the lake waters;

2. Establish an ecological filter system; proceed in the following order:

Step 1, carry out the earthwork excavation construction of water collection well 1, water storage well 6 and ecological filter 18 on the slope protection, after completing the earthwork excavation, lay anti-corrosion protection at the bottom of water collection well 1, water storage well 6 and ecological filter 18 positions The seepage layer 5, the anti-seepage layer 5 includes the first layer of long-fiber geotextile and anti-seepage membrane and the second layer of long-fiber geotextile arranged in sequence;

Step 2, construct water collection well 1, water storage well 6 and ecological filter 18 with concrete construction, the water storage capacity of water storage well 6 will be greater than the water storage capacity of water collection well 1; The volume of water collection well 1 and water storage well 6 can be according to The rainfall in the area where the ecological filter is built should be designed accordingly;

Step 3, set the water inlet 4 and the overflow 7 on the water collection well 1, the water inlet 4 is located at a distance of 10-20 cm from the bottom of the water collection well; the setting of the overflow 7 can be designed according to the actual situation of the local rainfall;

Step 4, laying a sedimentation layer 3 at the bottom of the water collection well 1, the sedimentation layer 3 is a mixed filler of vermiculite and zeolite, the particle diameter of the vermiculite and zeolite is between 5-10mm, and the height of the sedimentation layer 3 is 30 mm of the height of the water collection well 1 %-40%, the mass ratio of vermiculite and zeolite is 1:1;

Step 5, set the piston filter 2 in the water collection well 1, the piston filter 2 is a stainless steel cage without a cover, the mesh diameter of the stainless steel cage is 0.3mm, and the stainless steel cage is suspended in the water collection well 1 by a wire rope , the bottom of the stainless steel net cage should be higher than the overflow port 7, and the size of the stainless steel net cage can be designed according to the diameter of the water collection well 1;

Step 6, setting an aeration device 8 on the side wall of the water storage well 6 to ensure that the rainwater can fully contact with the air;

Step 7, lay packing layer in ecological filter tank 18, packing layer comprises fine gravel packing layer 13, zeolite packing layer 14 and crushed stone packing layer 15 that are arranged from top to bottom, fine gravel packing layer 13, zeolite packing layer 14 and The thickness ratio of the crushed stone packing layer 15 is 2:3:5, wherein, the particle diameter of the fine gravel packing layer 13 is 5-10mm, the particle diameter of the zeolite packing layer 14 is 10-16mm, and the particle diameter of the crushed stone packing layer 15 is 16-30mm;

Step 8, the water distribution pipe 10 is arranged at a distance of 10-20 cm from the surface of the fine gravel packing layer 13, uniform water distribution holes are arranged on the water distribution pipe 10 towards the side of the fine gravel packing layer 13, and the water inlet end of the water distribution pipe 10 Connected with the water storage well 6, the water distribution pipe 10 is covered with a sandy soil layer 11; the diameter of the water distribution hole can be properly set according to the rainfall, and the sandy soil layer 11 can be a mixture of fine sand and soil, which can provide a good environment for plants. living environment;

Step 9. Plant slope protection plants on the sand layer 11. The slope protection plants 12 are one or more of ryegrass, reed, cattail, water onion, and canna. The environment can also prevent soil erosion in slope protection.

Step 10, setting the water outlet (12) on the ecological filter 18, the height of the water outlet (12) is 30% of the height of the gravel packing layer 15.

According to the above steps, select a suitable area, establish an invisible ecological filter system for the collection and reuse of initial rainwater, and monitor the initial rainwater data of the construction area for a period of 3 months. The specific sampling process is: each time the initial rainwater starts to form When road runoff occurs, a certain amount of rainwater samples are collected with polyethylene bottles, and various indicators are tested in the laboratory. At the same time, the initial rainwater that passes through the system is collected to monitor various indicators. The specific treatment effect is shown in the following table:

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (9)

1. The invisible ecological filter system used for initial rainwater collection and reuse, including a water collection well (1), is characterized in that it also includes a water storage well (6) and an ecological filter (18), the water collection well (1), storage The water well (6) and the ecological filter (18) are arranged sequentially from top to bottom on the slope protection, and the bottom of the water collection well (1) is provided with a water inlet (4) connected to the bottom of the water storage well (6). (6) is provided with an aeration device (8), and the ecological filter (18) is provided with a crushed stone packing layer (15), a zeolite packing layer (14), a fine gravel packing layer (13) and a sandy soil packing layer from bottom to top. layer (11), the sand layer (11) is provided with slope protection plants (12), the sand layer (11) is provided with a water distribution pipe (10) connected to the water storage well (6), and an ecological filter (18) A water outlet (17) communicating with the gravel packing layer (15) is arranged on the top. 2. The invisible ecological filter system for initial rainwater collection and reuse according to claim 1, characterized in that, the bottom of the water collection well (1) is provided with a sedimentation layer (3), and the water collection well (1) The top of the tank is provided with a piston filter (2), the side wall of the water collection well (1) is provided with an overflow port (7) communicating with the water storage well (6), and the piston filter (2) is a stainless steel cage. The stainless steel net cage is suspended in the water collection well by a steel wire rope, and the bottom of the stainless steel net cage is higher than the overflow port (7). 3. The invisible ecological filter system for initial rainwater collection and reuse according to claim 2, characterized in that, the settling layer (3) is a mixed filler of vermiculite and zeolite, and the particle size of vermiculite and zeolite is uniform. Choose a diameter between 5-10mm. 4. The invisible ecological filter system for initial rainwater collection and reuse according to claim 2, characterized in that the water inlet end of the water distribution pipe (10) is higher than the water outlet end of the water inlet (4), The water inlet end of the water distribution pipe (10) is lower than the overflow port (7). 5. The invisible ecological filter system for initial rainwater collection and reuse according to claim 1, characterized in that, the water collection well (1), storage well (6) and ecological filter (18) are All are provided with an anti-seepage layer (5). 6. The invisible ecological filter system for initial rainwater collection and reuse according to claim 1, characterized in that the aeration device (8) is arranged on the inner wall of the water storage well (6). 7. The invisible ecological filter system for initial rainwater collection and reuse according to claim 1, characterized in that, the water distribution pipe (10) is 10-20cm away from the surface layer of the fine gravel packing layer (13). 8. The invisible ecological filter system for initial rainwater collection and reuse according to claim 1, characterized in that, the particle size of the fine gravel packing layer (13) is 5-10 mm; the zeolite packing layer (14 ) has a particle size of 10-16mm; the particle size of the gravel filler layer (15) is 16-30mm. 9. The invisible ecological filter system for initial rainwater collection and reuse according to claim 1, characterized in that, the slope protection plant (12) is one of ryegrass, reed, cattail, water onion, and canna kind.