Bypass bidirectional flow anti-clogging constructed wetland treatment device

Abstract

The utility model discloses a bypass bidirectional flow anti-blocking constructed wetland treatment device which comprises a first water inlet and a second water inlet, the first water inlet is communicated with a first surface flow constructed wetland; the second water inlet is communicated with a second surface flow constructed wetland; a vertical filtering wetland group is arranged in front of the first surface flow constructed wetland and the second surface flow constructed wetland; the vertical filtering wetland group is formed by alternately connecting a plurality of downstream filtering wetlands and a plurality of upstream filtering wetlands; the upstream filtering wetland or the downstream filtering wetland at one tail end of the vertical filtering wetland group is connected with a first water outlet; and the upstream filtering wetland or the downstream filtering wetland positioned at the other tail end of the vertical filtering wetland group is connected with a second water outlet. The bypass bidirectional flow anti-blocking artificial wetland treatment device can filter and purify a runoff water body at the maximum efficiency under the condition of a limited wetland area, and the service life of the wetland treatment device is ensured.

Description

Technical Field

[0001] The utility model relates to a bypass bidirectional flow anti-clogging artificial wetland treatment device. Background Art

[0002] Treatment of runoff-polluted water bodies is an important topic in the current field of environmental protection. Runoff water bodies mainly refer to the phenomenon that rainwater flows through cities, farmlands or industrial areas, carrying various pollutants such as grease, pesticides, heavy metals, etc., and eventually discharges into rivers, lakes or oceans, causing water pollution. In order to effectively prevent and control runoff pollution, people have studied and applied many technologies, including physical, chemical and biological treatment technologies. As an ecological engineering method, artificial wetlands are also widely used in the treatment of runoff pollution.

[0003] The commonly used technologies for treating runoff pollution are as follows: 1) Rain garden: Rain garden is a technology that uses vegetation and soil to filter pollutants in rainwater. Through plant absorption and soil filtration, runoff can be effectively purified; 2) Reservoir / lake: Reservoirs or lakes can slow down the flow rate of runoff and precipitate suspended matter, thereby reducing pollutants in runoff; 3) Wetland filtration: Wetlands can degrade organic matter and nutrients in runoff through the action of vegetation and microorganisms, thereby playing a purification role; 4) Biofilter: Biofilter uses microorganisms to degrade organic matter and purify pollutants in runoff; 5) Vegetation cover: Vegetation cover can reduce soil erosion and prevent the loss of soil and nutrients in runoff.

[0004] Among them, the technologies related to artificial wetlands are as follows: 1) Artificial wetlands: Artificial wetlands are a type of project that simulates natural wetlands. Through the action of wetland vegetation and microorganisms, pollutants in runoff are purified. 2) Artificial wetland retention ponds: Runoff water is introduced into artificial wetland retention ponds, and runoff is purified through filtration by vegetation and soil; 3) Wetland filter belts: Wetland filter belts are set up around natural or artificial wetlands to purify runoff through the filtration of vegetation and soil, etc.

[0005] At present, artificial wetland treatment technology has the following disadvantages: 1) Large area of ​​land: artificial wetlands require a large area of ​​land, which may be difficult to achieve in cities or densely populated areas; 2) The effect is difficult to maintain for a long time: long-term operation of biological fillers will cause blockage and poor operation, and the microbial community in the filter filler layer will be difficult to effectively play its role. Utility Model Content

[0006] The utility model provides a bypass bidirectional flow anti-blocking artificial wetland treatment device to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0007] A bypass bidirectional flow anti-clogging artificial wetland treatment device comprises: a first water inlet for introducing a runoff water body and a second water inlet for introducing a runoff water body; the first water inlet is connected to a first surface flow artificial wetland; the second water inlet is connected to a second surface flow artificial wetland; a vertical filtering wetland group for performing downward vertical filtration and upward vertical filtration on the runoff water body is arranged between the first surface flow artificial wetland and the second surface flow artificial wetland; the vertical filtering wetland group is formed by alternatingly connecting a plurality of downward filtering wetlands and a plurality of upward filtering wetlands; the connecting positions between a plurality of adjacent downward filtering wetlands and upward filtering wetlands are arranged alternately up and down; the upward filtering wetlands at one end of the vertical filtering wetland group The wetland or the downward filtering wetland is connected to a first water outlet; the upward filtering wetland or the downward filtering wetland located at the other end of the vertical filtering wetland group is connected to a second water outlet; the first water outlet and the first water inlet are located on one side of the vertical filtering wetland group; the second water outlet and the second water inlet are located on the other side of the vertical filtering wetland group; a first partition is slidably arranged between adjacent upward filtering wetlands and downward filtering wetlands of the vertical filtering wetland group for adjusting the connection position between the adjacent upward filtering wetlands and downward filtering wetlands; the first partition slides between the upper end connecting the adjacent upward filtering wetlands and downward filtering wetlands and the lower end connecting the adjacent upward filtering wetlands and downward filtering wetlands.

[0008] Furthermore, the structure of the upward filtering wetland or the downward filtering wetland is the same, and is provided with: a vegetation layer, a heat preservation layer, a purification layer and a support layer in sequence from top to bottom.

[0009] Furthermore, the vegetation layer is composed of reeds, calamus, and cattails.

[0010] Further, the insulation layer consists of volcanic rock.

[0011] Furthermore, the purification layer is formed by melting zeolite and limestone at high temperature.

[0012] Furthermore, the supporting layer is composed of a mixture of coarse sand particles and zeolite.

[0013] Furthermore, the bypass bidirectional flow anti-clogging artificial wetland treatment device includes: multiple groups of vertical filtering wetland groups; multiple groups of vertical filtering wetland groups are arranged in parallel, and the upward filtering wetlands and downward filtering wetlands corresponding to the two ends of two adjacent groups of vertical filtering wetland groups are interconnected so that the flow direction of the runoff water body is in an intestinal type with multiple bends.

[0014] Furthermore, a second partition for adjusting the connection position between the adjacent upward filtering wetlands and downward filtering wetlands between the corresponding ends of two adjacent vertical filtering wetland groups is provided; the second partition slides between the upper end between the adjacent upward filtering wetlands and downward filtering wetlands between the corresponding ends of the two adjacent vertical filtering wetland groups and the lower end between the adjacent upward filtering wetlands and downward filtering wetlands between the corresponding ends of the two adjacent vertical filtering wetland groups.

[0015] Furthermore, the bypass bidirectional flow anti-blocking artificial wetland treatment device is arranged in a fan shape as a whole; the first water inlet and the second water inlet are respectively arranged on both sides of the large end of the fan; the first water outlet and the second water outlet are respectively arranged on both sides of the small end of the fan.

[0016] Furthermore, the first water inlet and the second water inlet both include: a water collection channel and a water collection well; the first water outlet and the second water outlet both include: a water distribution valve well and a water distribution main pipe.

[0017] The benefit of the utility model lies in that the bypass bidirectional flow anti-clogging artificial wetland treatment device provided can perform forward filtration and reverse filtration on the entire wetland treatment device through a wetland design with a bidirectional vertical filtration function, and can perform forward flushing and reverse flushing on the entire wetland treatment device through forward and reverse filtration strokes, thereby avoiding clogging of the entire wetland treatment device. In this way, under the condition of limited wetland area, the runoff water body can be filtered and purified with maximum efficiency, and the service life of the wetland treatment device can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the bypass bidirectional flow anti-clogging artificial wetland treatment device of the utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the bypass bidirectional flow anti-clogging artificial wetland treatment device in which water is drawn from the first water inlet;

[0021] Figure 3 yes Figure 1 A schematic diagram of the bypass bidirectional flow anti-clogging constructed wetland treatment device in which water is drawn from the second water inlet;

[0022] Figure 4 yes Figure 1 A schematic diagram of a first water inlet and a second water inlet of a bypass bidirectional flow anti-clogging constructed wetland treatment device;

[0023] Figure 5 yes Figure 1 A schematic diagram of a first water outlet and a second water outlet of a bypass bidirectional flow anti-clogging constructed wetland treatment device;

[0024] Figure 6 yes Figure 1 A cross-sectional view of a vertical filtering wetland group of a bypass bidirectional flow anti-clogging constructed wetland treatment device;

[0025] A bypass two-way flow anti-clogging artificial wetland treatment device 10, a first water inlet 11, a water collection channel 111, a water collection well 112, a water collection valve 113, a second water inlet 12, a water distribution valve well 121, a water distribution main 122, a first surface flow artificial wetland 13, a second surface flow artificial wetland 14, a vertical filtering wetland group 15, a downward filtering wetland 151, an upward filtering wetland 152, a vegetation layer 153, an insulation layer 154, a purification layer 155, a support layer 156, a first water outlet 16, a second water outlet 17, a first baffle 18, a second baffle (not shown), a large end 20, and a small end 21. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] like Figures 1 to 6 As shown, a bypass bidirectional flow anti-clogging artificial wetland treatment device 10 of the present application includes: a first water inlet 11 and a second water inlet 12, both of which are used to introduce runoff water. The first water inlet 11 is connected to a first surface flow artificial wetland 13 to pre-treat the introduced runoff water by precipitation and oxidation. At the same time, the second water inlet 12 is connected to a second surface flow artificial wetland 14, which is also used to pre-treat the introduced runoff water by precipitation and oxidation. A vertical filtering wetland group 15 is provided between the first surface flow artificial wetland 13 and the second surface flow artificial wetland 14 to perform downward vertical filtration and upward vertical filtration on the runoff water, thereby effectively filtering and purifying the runoff water.

[0028] Specifically, the vertical filtering wetland group 15 is formed by alternatingly connecting a plurality of downstream filtering wetlands 151 and a plurality of upstream filtering wetlands 152, and the connecting positions between a plurality of adjacent downstream filtering wetlands 151 and upstream filtering wetlands 152 are alternately arranged up and down, so that the runoff water body can be controlled to be filtered along an intestinal-shaped path such as up, down, up, down, etc., thereby improving the filtering and purification effect. The upstream filtering wetland 152 or the downstream filtering wetland 151 at one end of the vertical filtering wetland group 15 is connected to a first water outlet 16 to discharge the runoff water body entering from the first water inlet 11 for filtration, and the upstream filtering wetland 152 or the downstream filtering wetland 151 at the other end of the vertical filtering wetland group 15 is connected to a second water outlet 17 to discharge the runoff water body entering from the second water inlet 12 for filtration. During installation, the first water outlet 16 and the first water inlet 11 are located on one side of the vertical filtering wetland group 15, and the second water outlet 17 and the second water inlet 12 are located on the other side of the vertical filtering wetland group 15. This makes it easy to clearly know the water inlet and outlet directions and is not easy to make mistakes.

[0029] Of course, it is also possible to control by adjusting the number and combination of the specific downstream filtering wetlands 151 and upstream filtering wetlands 152 of the vertical filtering wetland group 15: the runoff water entering from the first water inlet 11 flows out from the second water outlet 17, and the runoff water entering from the second water inlet 12 flows out from the first water outlet 16.

[0030] Furthermore, a first partition 18 is slidably arranged between the adjacent upward filtering wetlands 152 and the downward filtering wetlands 151 of the vertical filtering wetland group 15, and the connection position between the adjacent upward filtering wetlands 152 and the downward filtering wetlands 151 can be adjusted by the first partition 18, that is, the first partition 18 slides between the upper end connecting the adjacent upward filtering wetlands 152 and the downward filtering wetlands 151 and the lower end connecting the adjacent upward filtering wetlands 152 and the downward filtering wetlands 151.

[0031] like Figures 1 to 3 As shown, the bypass bidirectional flow anti-clogging artificial wetland treatment device 10 of this scheme includes: multiple groups of vertical filtering wetland groups 15, the multiple groups of vertical filtering wetland groups 15 are arranged in parallel, and the upstream filtering wetland 152 and the downstream filtering wetland 151 corresponding to the two ends of two adjacent groups of vertical filtering wetland groups 15 are interconnected so that the flow direction of the runoff water body is in an intestinal type with multiple bends.

[0032] As a specific embodiment, a second partition (not shown) is provided between the adjacent upward filtering wetland 152 and the downward filtering wetland 151 between the corresponding ends of two adjacent vertical filtering wetland groups 15, and the second partition (not shown) can adjust the connection position between the adjacent upward filtering wetland 152 and the downward filtering wetland 151. That is, the second partition (not shown) slides between the upper end between the adjacent upward filtering wetland 152 and the downward filtering wetland 151 between the corresponding ends of the two adjacent vertical filtering wetland groups 15 and the lower end between the adjacent upward filtering wetland 152 and the downward filtering wetland 151 between the corresponding ends of the two adjacent vertical filtering wetland groups 15.

[0033] The second partition here has the same structure as the first partition, and the adjustment method is also the same. It can be moved up and down by directly pulling upward or pressing downward. Since the first partition and the second partition are tightly clamped between the adjacent upstream filter wetland 152 and the downstream filter wetland, when they are directly pulled upward or pressed downward, the position can basically remain fixed, and positioning pins can also be set on the first partition and the second partition to fix their upper and lower positions. Therefore, although the second partition is not shown in the figure, the structure and working principle of the second partition can be clearly understood according to the content of the specification.

[0034] The above-mentioned bypass two-way flow anti-clogging artificial wetland treatment device 10 can change the water inlet direction through the wetland design with a two-way vertical filtering function, and can perform forward filtering and reverse filtering on the entire wetland treatment device. Through the forward and reverse filtering strokes, the entire wetland treatment device can be forward flushed and reverse flushed, avoiding the wetland from running in the same direction for a long time and being blocked, thereby avoiding the entire wetland treatment device from being blocked. The bypass two-way flow anti-clogging artificial wetland treatment device 10 is composed of surface flow and alternating upward vertical flow submerged wetlands and downward vertical flow submerged wetlands, and can efficiently remove impurities such as ammonia nitrogen, total nitrogen and total phosphorus in runoff sewage. In this way, under the condition of limited wetland area, the bypass two-way flow anti-clogging artificial wetland treatment device 10 can filter and purify the runoff water body with the greatest efficiency and ensure the service life of the wetland treatment device.

[0035] As a specific implementation, the bypass bidirectional flow anti-clogging artificial wetland treatment device 10 is arranged in a fan shape as a whole, the first water inlet 11 and the second water inlet 12 are respectively arranged on both sides of the large end 20 of the fan, and the first water outlet 16 and the second water outlet 17 are respectively arranged on both sides of the small end 21 of the fan. Such an arrangement allows the runoff water body to have a larger precipitation oxidation environment when entering the wetland treatment device under the condition of limited filtering wetland area, thereby improving the effect of pretreatment of the runoff water body and effectively balancing the matching degree of water pollution and the filtering amount of the specific filtering position.

[0036] like Figure 4 and Figure 5 As shown, the first water inlet 11 and the second water inlet 12 both include: a water collection channel 111 and a water collection well 112. The water collection channel 11 is provided with a water collection valve 113 to control the water inlet flow rate. The water collection channel 111 and the water collection well 112 are used to perform preliminary slow flow sedimentation on the incoming runoff water body, and the water body can be subjected to preliminary sedimentation treatment, thereby alleviating the treatment pressure of the first surface flow artificial wetland 13 and improving the effect of sedimentation pretreatment. The first water outlet 16 and the second water outlet 17 both include: a water distribution valve well 121 and a water distribution main pipe 122 for controlling the water outlet flow rate. The water distribution valve well 121 and the water distribution main pipe 122 can regulate the flow rate of the filtered water body, thereby controlling the flow rate of the water body being filtered, so that the purification rate can be controlled according to the specific pollution degree of the water body and the amount to be treated.

[0037] like Figure 6 As shown, the structures of the upstream filtering wetland 152 and the downstream filtering wetland 151 are the same, and are provided from top to bottom in sequence: a vegetation layer 153, a heat preservation layer 154, a purification layer 155 and a support layer 156. Among them: the vegetation layer 153 is composed of reeds, calamus, and cattails; the heat preservation layer 154 is composed of volcanic rocks; the purification layer 155 is made of zeolite and limestone melted at high temperature; the support layer is composed of a mixture of coarse sand particles and zeolite. The support layer ensures the stability of the filter layer structure, the purification layer 155 can ensure the effectiveness of adsorption and filtration of water bodies, and the vegetation layer 153 and the heat preservation layer 154 can ensure the activity of plants and microorganisms in the plant layer, so that it can not only filter organic matter, but also effectively remove nitrogen and phosphorus.

[0038] In actual operation, the above scheme Figure 2 As shown in the direction of the arrows, the river and lake water polluted by runoff first enters the first surface flow artificial wetland 13 through the first water inlet 11, and then the incoming water enters from the top of the upstream filtering wetland 152 and flows out from its bottom, and then enters the bottom of the downstream filtering wetland 151 and flows out from its top, and this process is repeated alternately, and finally the incoming water flows out from the first water outlet 16.

[0039] After running in the above-mentioned filtering direction for a period of time, some areas may cause blockage. Therefore, the reverse operation mode is adopted, that is, the gate of the first water inlet 11 is closed, and the incoming water enters the second surface flow artificial wetland 14, the vertical filtering wetland group 15 and the second outlet from the second water inlet 12 in sequence. In this process, the height of the slidable first partition 18 and the second partition (not shown) is adjusted so that the incoming water first enters from the top of the downward filtering wetland 151 and flows out from the bottom, and then enters from the bottom of the upward filtering wetland 152 and flows out from the top. This is repeated alternately, and finally the incoming water flows out from the second water outlet 17.

[0040] The hydraulic retention time of the bypass bidirectional flow anti-clogging artificial wetland treatment device 10 is 0.8 to 2.5 days. The hydraulic retention time is designed to be 0.4 to 1.2 m 3 / m 2 .d. Organic load is 3~15gCOD / m 2 .d.

[0041] The bypass two-way flow anti-clogging artificial wetland treatment device 10 is suitable for river and lake areas polluted by runoff. The bypass wetland is used to purify sewage, and the purified water is discharged into the river again, which can circulate and purify the water quality of rivers and lakes. In addition, the bypass two-way flow anti-clogging artificial wetland treatment device 10 is provided with double water inlets and double water outlets. By setting the water inlet flow direction, the water flow direction inside the bypass two-way flow anti-clogging artificial wetland treatment device 10 can be changed, thereby avoiding clogging of biological fillers.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A bypass bidirectional flow anti-clogging artificial wetland treatment device, characterized in that: include: a first water inlet for introducing a runoff water body and a second water inlet for introducing a runoff water body; The first water inlet is connected to a first surface flow artificial wetland; The second water inlet is connected to a second surface flow artificial wetland; A vertical filtering wetland group for performing downward vertical filtration and upward vertical filtration on the runoff water body is provided before the first surface flow artificial wetland and the second surface flow artificial wetland; The vertical filtering wetland group is formed by alternatingly connecting a number of downward filtering wetlands and a number of upward filtering wetlands; The connecting positions between the plurality of adjacent downstream filtering wetlands and the upstream filtering wetlands are arranged alternately up and down; The upward filtering wetland or the downward filtering wetland at one end of the vertical filtering wetland group is connected to a first water outlet; The upward filtering wetland or the downward filtering wetland at the other end of the vertical filtering wetland group is connected to a second water outlet; The first water outlet and the first water inlet are located on one side of the vertical filtering wetland group; The second water outlet and the second water inlet are located on the other side of the vertical filtering wetland group; A first partition plate for adjusting the communication position between the adjacent upward filtering wetland and the downward filtering wetland of the vertical filtering wetland group is slidably provided; The first partition plate slides between an upper end communicating with the adjacent upstream filtering wetland and the downstream filtering wetland and a lower end communicating with the adjacent upstream filtering wetland and the downstream filtering wetland.

2. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 1 is characterized in that: The structure of the upward filtering wetland or the downward filtering wetland is the same, and is provided with: a vegetation layer, a heat preservation layer, a purification layer and a support layer in sequence from top to bottom.

3. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 2 is characterized in that: The vegetation layer is composed of reeds, calamus and cattails.

4. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 2 is characterized in that: The thermal insulation layer is composed of volcanic rock.

5. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 1 is characterized in that: The bypass bidirectional flow anti-clogging artificial wetland treatment device comprises: a plurality of groups of the vertical filtering wetland groups; A plurality of vertical filtering wetland groups are arranged in parallel, and the upward filtering wetlands and the downward filtering wetlands corresponding to the two ends of two adjacent vertical filtering wetland groups are interconnected so that the flow direction of the runoff water body is in an intestinal shape with multiple bends.

6. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 5 is characterized in that: A second partition plate for adjusting the communication position between the adjacent upward filtering wetland and the downward filtering wetland between the corresponding ends of two adjacent groups of the vertical filtering wetland groups is provided; The second partition slides between the upper end between the adjacent upstream filtering wetland and the adjacent downstream filtering wetland between the corresponding ends of the two adjacent groups of the vertical filtering wetland groups and the lower end between the adjacent upstream filtering wetland and the adjacent downstream filtering wetland between the corresponding ends of the two adjacent groups of the vertical filtering wetland groups.

7. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 1 is characterized in that: The bypass bidirectional flow anti-clogging artificial wetland treatment device is arranged in a fan shape as a whole; The first water inlet and the second water inlet are respectively arranged on both sides of the fan-shaped large end; The first water outlet and the second water outlet are respectively arranged on both sides of the fan-shaped small end.

8. The bypass bidirectional flow anti-clogging artificial wetland treatment device according to claim 1, characterized in that: The first water inlet and the second water inlet both include: a water collection channel and a water collection well; The first water outlet and the second water outlet both include: a water distribution valve well and a water distribution main pipe.

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