CN218709755U - Ecological purification constructed wetland system - Google Patents

Abstract

This application provides an ecological purification artificial wetland system, the outlet of the grid well is connected to the water inlet of the sedimentation tank through the drain pipe, the water outlet of the sedimentation tank is connected to the water distribution pipe of the sand filter through the drain pipe, and the water outlet of the sand filter The water outlet is connected to the water distribution pipe of the soil infiltration tank through the drainage pipe; the water outlet of the soil infiltration tank is connected to the water inlet of the first-level oxidation pond through the drainage pipe, and the water outlet of the first-level oxidation pond is connected to the first-level oxidation pond through the drainage pipe. The water inlet of the subsurface flow constructed wetland and the water outlet of the first level subsurface flow constructed wetland are connected to the water inlet of the second level vertical subsurface flow constructed wetland through the drainage pipe, and the water outlet of the second level vertical subsurface flow constructed wetland is connected to the third level horizontal subsurface flow artificial wetland through the drainage pipe. The water inlet of the wetland and the water outlet of the three-level horizontal subsurface flow artificial wetland are connected to the landscape pond through drainage pipes. The system can effectively improve the water quality of urban water bodies and reduce the cost, energy consumption and efficiency of initial stormwater treatment.

Description

An ecological purification artificial wetland system

technical field

This application relates to the field of water environment management, in particular to an artificial wetland system for ecological purification.

Background technique

Urban water pollution can be divided into two types: point source pollution and non-point source pollution. Primary rainwater, as a typical non-point source pollution carrier, has the characteristics of wide geographical range, strong randomness, and complex causes, making it difficult to control and treat. Constructed wetland treatment system has been widely used in urban non-point source pollution control due to its advantages of low energy consumption and large amount of pollutant treatment. The efficiency is low; or the constructed wetland matrix is prone to clogging, the operation and maintenance costs are high, and the investment is large.

Utility model content

One of the purposes of the present application is to provide an ecological purification artificial wetland system to solve the existing problem of poor initial rainwater treatment effect.

The technical scheme of the application is:

An ecological purification artificial wetland system, including grid wells, sedimentation tanks, sand filter tanks, soil infiltration tanks, primary oxidation ponds, first-level horizontal underflow artificial wetlands, second-level vertical underflow artificial wetlands, and third-level Horizontal subsurface flow artificial wetland and landscape pond; the water outlet of the grid well is connected to the water inlet of the sedimentation tank through the drain pipe, and the water outlet of the sedimentation tank is connected to the water distribution pipe of the sand filter tank through the drain pipe, The water outlet of the sand filter is connected to the water distribution pipe of the soil infiltration tank through a drainage pipe for preliminary treatment of initial rainwater; the water outlet of the soil infiltration tank is connected to the first-level The water inlet of the oxidation pond, the water outlet of the primary oxidation pond is connected to the water inlet of the first-level horizontal subsurface flow constructed wetland through a drain pipe, and the water outlet of the first-level horizontal subsurface flow constructed wetland is connected to the The water inlet of the secondary vertical subsurface flow constructed wetland, the water outlet of the secondary vertical subsurface flow constructed wetland is connected to the water inlet of the third level horizontal subsurface flow constructed wetland through a drain pipe, and the water outlet of the third level horizontal subsurface flow constructed wetland passes through The drainage pipe is connected to the landscape pond, and is used to carry out deep purification treatment on the initial rainwater and discharge it into the downstream river channel.

As a technical solution of this application, the sedimentation tank, the sand filter tank, the soil infiltration tank, the primary oxidation pond, the primary horizontal subsurface flow constructed wetland, and the secondary vertical subsurface flow artificial wetland The elevations of the wetlands, the third-level horizontal subsurface flow constructed wetlands, and the landscape ponds are successively lowered.

As a technical solution of the present application, water level monitoring equipment and water quality monitoring equipment are installed at the water inlet pipe of the grid well, and the grid well is set at the front end of the ecological purification artificial wetland system. The water inlet and outlet of the well are higher than the sedimentation tank.

As a technical solution of the present application, the interior of the sand filter is filled with fine sand, and the water distribution pipe is arranged on the upper surface of the sand filter and is a PE perforated pipe; the water outlet of the sand filter Set at the lower part of the sand filter.

As a technical solution of the present application, the water distribution pipe of the soil infiltration tank is arranged on the upper surface of the soil infiltration tank and is a PE perforated pipe, and the fillers in the soil infiltration tank are sequentially arranged from top to bottom It is a crushed stone layer, a porous spherical plastic layer, a mixed layer of zeolite iron filings, a mixed layer of soil limestone and a coarse sand layer, an aeration pipe is arranged between the mixed layer of zeolite iron filings and the mixed layer of soil limestone, and the The bottom of the soil infiltration tank collects water through seamless perforated steel pipes.

As a technical solution of the present application, water inlets and water outlets are respectively provided on opposite sides of the upper part of the primary oxidation pond, and water level monitoring equipment is provided in the primary oxidation pond.

As a technical solution of the present application, the first level subsurface flow constructed wetland and the third level subsurface flow constructed wetland are all composed of brick-concrete structures, and both have a length of 15m and a bottom slope of 0.5%; Water inlets and water outlets are respectively provided on opposite sides of the upper part of the horizontal subsurface flow constructed wetland, and water inlets and water outlets are respectively provided on opposite sides of the upper part of the three-level horizontal subsurface flow constructed wetland.

As a technical solution of the present application, the secondary vertical subsurface flow constructed wetland is composed of a brick-concrete structure with a length of 15m and a flat slope at the bottom; the upper surface of the secondary vertical subsurface flow constructed wetland is provided with a water distribution pipe, and It is a PE perforated pipe; the bottom of the secondary vertical subsurface flow artificial wetland is provided with a water outlet.

As a technical solution of the present application, an ecological floating island is provided on the upper part of the landscape pond, and the ecological floating island is composed of a PVC floating board; the bottom of the landscape pond is provided with a nylon net, and the inside of the nylon net is It is a porous spherical biological filler with a diameter of 30mm.

The beneficial effect of this application:

In the ecological purification artificial wetland system of the present application, it can solve the problems of insufficient water holding capacity in the artificial wetland in dry season, damage to the ecological structure of the wetland and other adverse effects, can solve the problem of urban water environment, and can reduce the non-point source pollution caused by initial rainwater ; At the same time, the system can solve the high cost and high energy consumption problems of initial rainwater treatment, and realize the low cost, low energy consumption, low investment and high efficiency of initial rainwater treatment; and, it is very important for ensuring the water quality of urban water bodies and improving the landscape effect of urban water environment 1. It plays a positive role in promoting the development of urban water ecology, conforms to the concept of green development, and has great promotion and application value.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, so It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the schematic diagram of the ecological purification artificial wetland system provided by the embodiment of the present application;

Fig. 2 is a schematic diagram of a soil infiltration tank provided in an embodiment of the present application.

Icons: 1-grid well; 2-sedimentation tank; 3-sand filter; 4-soil infiltration tank; 5-first-level oxidation pond; 6-first-level horizontal subsurface flow constructed wetland; ; 8-three-level horizontal subsurface flow constructed wetland; 9-landscape pond; 10-gravel layer; 11-porous spherical plastic layer; 12-zeolite iron filings mixed layer;

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower" and so on is based on the orientation or positional relationship shown in the drawings, or the conventional placement of the utility model product during use. The orientation or positional relationship is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the application .

In addition, in the present application, unless otherwise clearly specified and limited, a first feature above or below a second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact with each other. contact but through additional feature contact between them. Moreover, the first feature on, above and above the second feature includes the first feature directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature being below, below and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is absolutely level or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "connecting" and "connecting" should be interpreted in a broad sense, for example, it can be a fixed connection or an optional connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

Example:

Please refer to Figure 1, with reference to Figure 2, this application provides an intelligent ecological purification artificial wetland system, which mainly consists of grid well 1, sedimentation tank 2, sand filter tank 3, soil infiltration tank 4, primary oxidation pond 5 1. Level 1 horizontal subsurface flow constructed wetland 6, level 2 vertical subsurface flow constructed wetland 7, level 3 horizontal subsurface flow constructed wetland 8, and landscape pond 9. The system realizes the preliminary treatment of initial rainwater through the soil infiltration system composed of grid well 1, sedimentation tank 2, sand filter tank 3, and soil infiltration tank 4, and through the primary oxidation pond 5, the primary horizontal underflow artificial The ecological purification system composed of wetland 6, secondary vertical subsurface flow constructed wetland 7, third level horizontal subsurface flow constructed wetland 8, and landscape pond 9 realizes the deep purification treatment of initial rainwater, and then discharges it into the downstream river. When the influent water exceeds the processing load of the constructed wetland system, it will overflow to the downstream river; when the influent water quality is good, it will directly enter the primary oxidation pond 5 for subsequent treatment; if the water quality is poor, it will start from the grid well 1 Proceed to normal processing.

Further, sedimentation tank 2, sand filter tank 3, soil infiltration tank 4, first-level oxidation pond 5, first-level horizontal underflow constructed wetland 6, second-level vertical underflow artificial wetland 7, third-level horizontal underflow artificial wetland 8, landscape pond The elevations of the positions set at 9 are successively lowered, which realizes the gravity gravity flow of sewage in the whole system and reduces the energy consumption of the system. Among them, the grid well 1 is set at the front end of the whole system, which is used to intercept soft windings, larger solid particles and floating objects, and prevent these garbage, impurities and suspensions from flowing into subsequent units. Moreover, the sedimentation tank 2 is used to settle the suspended matter in the initial rainwater, and its water inlet and water outlet are both arranged at the upper part of the tank. In addition, the interior of the sand filter 3 is filled with fine sand; the water distribution pipes are located on the surface of the sand filter 3, and PE perforated pipes are used to distribute water evenly and enhance the filtering effect; the water outlet of the sand filter 3 Located in the middle and lower part of the pond, it can be specifically adjusted according to the ground elevation of the downstream soil infiltration pond 4.

Further, the water distribution pipes of the soil infiltration tank 4 are arranged at the pool surface of the soil infiltration tank 4, and PE perforated pipes are used for uniform water distribution. The filler in the soil infiltration tank 4 is divided into 5 layers, which are as follows from top to bottom: ①Fill the crushed stone layer 10 composed of crushed stones with a specification of 10-30mm, the layer thickness is 25cm, and mainly plays the role of water distribution; ② Fill the porous spherical plastic layer 11 made of 20mm porous spherical plastic filler with a layer thickness of 45cm. The filler is mainly to enrich microorganisms and remove organic matter in the sewage; The mixed layer 12 of zeolite and iron filings composed of shavings has a layer thickness of 25cm. Zeolite is mainly used to remove NH ₄ ⁺ -N, and iron filings is mainly used to remove TP; The soil-limestone mixed layer 13 composed of sawdust, with a thickness of 70cm, limestone is used to supplement alkalinity, cinder is used to increase the permeability of the system, and sawdust provides slow-release carbon source for denitrification; ⑤Fill coarse sand composed of coarse sand Layer 14, with a thickness of 25cm, is mainly to prevent soil erosion. It should be noted that an aeration pipe is arranged between the zeolite iron filings mixed layer 12 and the soil-limestone mixed layer 13, and the aeration pipe can satisfy the oxygen amount required by the aerobic microorganisms and the mixing condition that the sewage and the activated sludge fully contact, Strengthen the treatment effect; moreover, it collects water at the bottom of the pool through seamless perforated steel pipes.

It should be noted that the effective water depth of the primary oxidation pond 5 is 1.2m, the hydraulic retention time is 20h, and the water inlet and outlet of the primary oxidation pond 5 are both located on its upper part. A stable ecosystem of animals, plants, and microorganisms is formed in the first-level oxidation pond 5, which can continuously purify the pollutants in the water. Among them, aquatic plants such as water hyacinth, grass reed, cattail, weed, and duckweed are planted on the surface. It can effectively reduce pollutants, has the function of ecologically purifying water quality, and at the same time acts as a regulating pond, which can improve the system's regulation of water quality and quantity, improve the system's impact resistance, and provide a pre-buffering effect for subsequent constructed wetlands. In addition, water level monitoring equipment is installed in the primary oxidation pond 5. When the water level is too low, it will be supplemented by pumping water from the downstream river to avoid problems such as damage to the wetland ecological structure due to water shortage in the system.

At the same time, the first-level subsurface flow constructed wetland 6 and the third-level subsurface flow constructed wetland 8 are both composed of brick-concrete structures. The length of both is 15m, the bottom slope is 0.5%, and the effective water depth is 0.7m. Both the water inlet and the water outlet are located at the respective upper parts. The first level subsurface flow constructed wetland 6 and the third level subsurface flow constructed wetland 8 are mainly composed of soil, fillers, grids, and plants, and perforated flower walls are used for water distribution and water collection. The height of the filling layer of the first-level subsurface flow constructed wetland 6 and the third-level subsurface flow constructed wetland 8 is 0.9m, and the lower part is filled with crushed stones. 0.5m wide steel slag reaction grid, 1m wide limestone reaction grid and 1m wide zeolite reaction grid; the upper part of the first level subsurface flow constructed wetland 6 and the third level subsurface flow constructed wetland 8 are filled with agricultural soil, and the height is 0.2m; The surface planting plants of the two are canna, cattail, calamus, day lily, umbrella grass, and yellow iris.

In addition, the secondary vertical subsurface flow constructed wetland 7 is composed of brick-concrete structure with a length of 15m, a flat slope at the bottom, and an effective water depth of 0.7m. The water distribution pipes are located on the surface of the pool, and PE perforated pipes are used for uniform water distribution; the water outlet of the secondary vertical subsurface flow artificial wetland 7 is located at the bottom of the wetland, and the surface planting plants are aquatic canna and reed, and the planting depth is 20-25cm.

Further, the landscape pond 9 is provided with an ecological floating island. The material of the ecological floating island is a PVC floating plate, and the bottom is connected with a nylon mesh. The nylon mesh is a porous spherical biological filler with a diameter of 30 mm. The spherical biological filler can attach microorganisms and promote pollution. It also provides growth space for the growth of ecological floating island plants. The unit shape of the ecological floating island is square, and the coverage area accounts for 60% to 80% of the water surface of the landscape pond 9. The plants on the floating island are Zailihua, Shichangpu, Violet Iris, Sagittarius, Cattail, Trichosanthes, Canna, Barracuda Grass etc.

To sum up, the system can solve the problems of insufficient water holding capacity in the constructed wetland during the dry season and the damage to the ecological structure of the wetland; it can also solve the problem of urban water environment and reduce the non-point source pollution caused by initial rainwater; and, the system can Solve the high cost and high energy consumption problems of initial rainwater treatment, and realize the low cost, low energy consumption, low investment and high efficiency of initial rainwater treatment. In addition, it plays a positive role in ensuring the water quality of urban water bodies, improving the landscape effect of urban water environment, and promoting the development of urban water ecology. It is in line with the concept of green development and has great promotion and application value.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (9)

1. An ecological purification artificial wetland system is characterized in that it comprises grid wells, sedimentation tanks, sand filters, soil infiltration tanks, primary oxidation ponds, primary horizontal subsurface flow artificial wetlands, secondary vertical Subsurface flow constructed wetlands, three-level horizontal subsurface flow constructed wetlands, and landscape ponds; the outlet of the grid well is connected to the water inlet of the sedimentation tank through a drain pipe, and the water outlet of the sedimentation tank is connected to the sand outlet through a drainage pipe. The water distribution pipe of the filter tank, the water outlet of the sand filter tank is connected to the water distribution pipe of the soil infiltration tank through the drain pipe, and is used for the preliminary treatment of the initial rainwater; the water outlet of the soil infiltration tank is passed through the drain pipe Connected to the water inlet of the first-level oxidation pond, the water outlet of the first-level oxidation pond is connected to the water inlet of the first-level horizontal subsurface flow constructed wetland through a drain pipe, and the water outlet of the first-level horizontal subsurface flow constructed wetland passes through The drainage pipe is connected to the water inlet of the secondary vertical subsurface flow constructed wetland, and the water outlet of the secondary vertical subsurface flow constructed wetland is connected to the water inlet of the third-level horizontal subsurface flow constructed wetland through a drainage pipe. The water outlet of the constructed wetland is connected to the landscape pond through a drainage pipe, which is used to carry out deep purification treatment on the initial rainwater and discharge it into the downstream river channel. 2. The ecological purification artificial wetland system according to claim 1, characterized in that, the sedimentation tank, the sand filter tank, the soil infiltration tank, the primary oxidation pond, and the primary horizontal underflow The elevations of the constructed wetlands, the secondary vertical subsurface flow constructed wetlands, the tertiary horizontal subsurface flow constructed wetlands, and the landscape ponds are successively lowered. 3. The ecological purification artificial wetland system according to claim 1, characterized in that water level monitoring equipment and water quality monitoring equipment are installed at the water inlet pipe of the grid well, and the grid well is set in the ecological purification At the front end of the constructed wetland system, the water inlet and outlet of the grid well are higher than the sedimentation tank. 4. The ecological purification artificial wetland system according to claim 1, wherein the inside of the sand filter is filled with fine sand, and the water distribution pipe is arranged on the upper surface of the sand filter and is perforated by PE pipe; the water outlet of the sand filter is located at the lower part of the sand filter. 5. The ecological purification artificial wetland system according to claim 1, wherein the water distribution pipe of the soil infiltration tank is arranged on the upper surface of the soil infiltration tank and is a PE perforated pipe, and the soil infiltration tank The filler in the filter is from top to bottom successively a crushed stone layer, a porous spherical plastic layer, a mixed layer of zeolite iron filings, a mixed layer of soil limestone and a coarse sand layer, and the layer between the mixed layer of zeolite iron filings and the mixed layer of soil limestone is Aeration pipes are arranged between them, and the bottom of the soil infiltration tank collects water through seamless perforated steel pipes. 6. The artificial wetland system for ecological purification according to claim 1, wherein a water inlet and a water outlet are respectively arranged on the opposite sides of the upper part of the primary oxidation pond, and the primary oxidation pond is provided with Water level monitoring equipment. 7. The ecological purification constructed wetland system according to claim 1, characterized in that, the first-level horizontal subsurface flow constructed wetland and the third-level horizontal subsurface flow constructed wetland are all composed of brick-concrete structures, and the length is 15m. The slopes are all 0.5%; the upper opposite sides of the first-level horizontal subsurface flow constructed wetland are respectively provided with water inlets and water outlets, and the upper opposite sides of the third-level horizontal subsurface flow constructed wetland are respectively provided with water inlets and outlets. Shuikou. 8. The ecological purification constructed wetland system according to claim 1, wherein the secondary vertical subsurface flow constructed wetland is composed of a brick-concrete structure with a length of 15m and a flat slope at the bottom; the secondary vertical subsurface flow constructed wetland A water distribution pipe is provided on the upper surface of the pipe, and it is a PE perforated pipe; a water outlet is provided at the bottom of the secondary vertical subsurface flow constructed wetland. 9. The ecological purification constructed wetland system according to claim 1, characterized in that, the top of the landscape pond is provided with an ecological floating island, and the ecological floating island is made of PVC material floating boards; the bottom of the landscape pond is provided with There is a nylon net, and inside the nylon net is a porous spherical biofiller with a diameter of 30mm.

Images