CN215049067U - Heat-preservation and cold-resistance biological retention pond - Google Patents

Abstract

The utility model belongs to the technical field of biological detention ponds, in particular to a heat-preservation and cold-resistance biological detention pond, which comprises a pond body; the pond body comprises a vegetation layer, the vegetation layer comprises switchgrass and/or bryophyte, and a transparent glass cover covers the vegetation layer. The water inlet pipe, the water guide pipe and the water outlet pipe are also included; the water inlet pipe is arranged in the unfrozen soil layer and comprises a far end and a near end, the far end is communicated with the sewage drain pipe, and the near end is communicated with the middle of the water guide pipe; the upper end of the water guide pipe is communicated with the atmosphere and is higher than the water inlet pipe, and the lower end of the water guide pipe is communicated with the bottom of the pond body; the water outlet pipe is communicated with the upper part of the tank body. The biological detention pond ensures the normal operation of the biological detention pond in winter, and has obvious ecological effect.

Description

Heat-preservation and cold-resistance biological retention pond

Technical Field

The utility model belongs to the technical field of biological detention pond, concretely relates to heat preservation and cold resistance's biological detention pond.

Background

As a typical low-influence development technology, the bioretention pond not only has the function of landscaping, but also has the functions of purifying water and replenishing underground water. Compared with the traditional method, the bioretention pond is widely applied due to the advantages of economy, high efficiency, simple operation, flexible arrangement, low operation and maintenance cost and the like, is an ideal distributed sewage treatment technology, and plays an important role in the treatment of urban storm runoff, domestic sewage and agricultural wastewater. However, in winter with low air temperature, the bioretention pond has a great reduction in the removal efficiency of pollutants, especially the denitrification efficiency, due to withering and death of plants, reduction in the activity of soil microorganisms and surface freezing and internal oxygen deficiency. Therefore, the sewage purification effect is ensured by taking convenient and effective heat preservation measures, and the problem that the bioretention pond can not be avoided when being popularized and used in areas with low temperature is solved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a natural, high-efficiency and stable heat-preservation and cold-resistance bioretention pond based on the prior art.

Particularly, the utility model provides a following technical scheme:

a heat-insulating and cold-resistant biological detention pond comprises a pond body;

the pond body includes the vegetable layer, the vegetable layer upper shield is equipped with transparent glass cover.

The utility model discloses a whole vegetable layer seals in the clear glass cover, guarantees the effect stability that keeps warm, makes the vegetation of planting can keep absorbing the activity winter at low temperature, maintains biological detention pond effective operation.

Preferably, in the bioretention pond described above, the vegetation layer comprises switchgrass and/or bryozoan. The switchgrass and the bryophytes are both barren-resistant, low-maintenance, perennial herbaceous plants. The switchgrass is large in aboveground biomass, wide in underground root system distribution range and strong in nitrogen and phosphorus pollutant absorption effect, and can be harvested in early winter, and stem leaves are cut into 5-7 cm-long segments and covered on the ground surface; the green period of the carex is long, and carex leaves cover the ground surface naturally without cutting. The greenhouse synergistic effect formed by the vegetation cover and the transparent glass cover improves the temperature rise range.

Preferably, in the bioretention pond, the transparent glass cover is 40-60 cm in height.

Preferably, in the biological retention tank, the transparent glass cover is square or cylindrical.

Preferably, the bioretention pond further comprises a water inlet pipe, a water guide pipe and a water outlet pipe;

the water inlet pipe is arranged in a non-frozen soil layer (namely the lowest soil temperature is more than 0 ℃), and comprises a far end and a near end, the far end is communicated with the sewage drain pipe, and the near end is communicated with the middle of the water guide pipe;

the upper end of the water guide pipe is communicated with the atmosphere and is higher than the water inlet pipe, and the lower end of the water guide pipe is communicated with the bottom of the pond body;

the water outlet pipe is communicated with the upper part of the tank body.

Preferably, in the biological retention tank, the water outlet pipe is arranged in the unfrozen soil layer.

Preferably, in the biological retention tank, the tank body further comprises a coarse sand layer and a gravel layer, the coarse sand layer is located below the vegetation layer, plants planted in the vegetation layer are rooted into the coarse sand layer, and the gravel layer is located below the coarse sand layer.

Preferably, in the biological retention tank, a geotextile layer is arranged between the coarse sand layer and the gravel layer.

Preferably, in the biological retention tank, the coarse sand layer is 50-70 cm, and the crushed stone layer is 30-50 cm.

Preferably, in the biological retention tank, the upper surface of the coarse sand layer is 10-20 cm lower than the ground so as to reduce heat dissipation.

Preferably, in the biological retention tank, the particle size of the coarse sand in the coarse sand layer is 1-2 mm.

The utility model discloses the beneficial effect who gains:

the utility model provides a heat preservation and cold resistance's biological detention pond has guaranteed biological detention pond normal operating in winter, and ecological effect is showing.

Drawings

FIG. 1 is a schematic view showing the structure of a bioretention pond according to example 1 of the present invention; wherein, 1 is the vegetable layer, 2 is transparent organic glass cover, 3 is the inlet tube, 4 is the aqueduct, 5 is the coarse sand layer, 6 is the gravel layer, 7 is the geotechnological cloth that permeates water, 8 is bioretention pond body, 9 is the outlet pipe.

Detailed Description

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. The examples do not show the specific techniques or conditions, according to the technical or conditions described in the literature in the field, or according to the product specifications.

In the description of the present invention, unless otherwise specified, the terms "upper", "lower", and the like indicate orientations or state relationships based on the orientations or state relationships shown in the drawings, and are only for convenience of description and simplified description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the following examples, the equipment and the like used are not shown to manufacturers, and are all conventional products available from regular vendors. The process is conventional unless otherwise specified, and the starting materials are commercially available from the open literature.

Example 1

Embodiment 1 provides a heat preservation and cold resistance's biological detention pond, can guarantee winter normal effective operation. As shown in attached figure 1, comprises a pool body 8, a water inlet pipe 3, a water guide pipe 4 and a water outlet pipe 9;

the pond body 8 sequentially comprises a vegetable layer 1, a coarse sand layer 5, a permeable geotextile 7 and a gravel layer 6 from top to bottom;

a transparent organic glass cover 2 is covered on the vegetable layer 1 to form a greenhouse; the vegetation layer 1 comprises switchgrass branch and leaf fragments covered on the coarse sand layer 5 and bryophytes rooted in the coarse sand layer 5;

the thickness of the coarse sand layer 5 is 60cm, the particle size is 1-2 mm, the upper surface of the coarse sand layer is 10cm lower than the outer surface of the pool body, the thickness of the gravel layer 6 is 40cm, and the particle size is 10-20 mm;

the water inlet pipe 3 is buried in an unfrozen soil layer 30cm below the ground (namely the lowest soil temperature is more than 0 ℃), and comprises a far end and a near end, wherein the far end is communicated with a sewage drainage pipe, and the near end is communicated with the water guide pipe 4;

the lower end of the water guide pipe 4 is directly communicated with the bottom of the pool body 8, and the upper end of the water guide pipe 4 penetrates through the top of the transparent organic glass cover 2 to be communicated with the atmosphere;

the water outlet pipe 9 is buried 35cm below the ground.

Sewage reaches the bottom of biological detention pond body 8 through aqueduct 4 along inlet tube 3, gets into biological detention pond gravel layer 6, and the sewage seepage flow that rises passes geotechnological cloth 7 that permeates water, gets into coarse sand layer 5, flows through behind the careless root zone of grass of densely covered in coarse sand layer 5, and the biological detention pond of water purification by outlet pipe 9 discharge.

The operation management comprises plant management and water flow regulation management. The plant management requires that switchgrass with large biomass and strong nitrogen and phosphorus absorption capacity and moss with long green period and good ground coverage effect are selected in a bioretention pond for combined planting, the planting density is moderate (5 clusters of switchgrass per square meter and 20 clusters of moss per square meter), the overground parts of the switchgrass are withered and harvested in the early winter, branches and leaves are cut into segments with the length of 5-7 cm and covered on the ground surface in the pond body, the moss is not mowed in winter, the ground surface is naturally covered, and a composite heat insulation layer is formed by the switchgrass segments. Meanwhile, from the beginning of winter, the upper part of the bioretention pond is covered with a transparent organic glass cover, so that the temperature is increased in sunny days, and the effects of reducing heat loss and keeping the temperature stable are achieved in cloudy days or at night. By combining the measures, the method provides effective guarantee for maintaining the biological activity of the sedge grass in winter.

The water flow regulation management requires that the sewage is always in a depth range which is less than 30cm away from the ground outside the tank body in the whole purification process, and because the soil temperature is in an ascending trend along with the increase of the depth in winter, the sewage enters the biological detention tank and firstly reaches the tank bottom which is 110cm deep, and after the temperature is raised, the sewage is raised layer by layer to reach the plant root system, so that the heat of deep soil is brought to the area where the root system is distributed, and the biological activity of the sedge is maintained in winter.

Simultaneously, it is required to explain that, the utility model discloses a whole vegetable layer seals in transparent organic glass covers, and transparent has glass to cover and need not establish the plant bleeder vent. The reason is as follows: (1) the ventilation holes are communicated with the outside, so that cold air can enter the greenhouse, and the heat-preservation and cold-resistance effects are greatly weakened, especially in windy weather; (2) plant photosynthesis requires CO in addition to light and water₂Metabolic respiration of soil microorganisms and plants and CO produced by the decomposition of the leaf fragments of switchgrass in a transparent glass cover₂Sufficient to meet the needs of plant photosynthesis; (3) it has partly air admission biological detention pond body bottom to have through the aqueduct, then in getting into the glass cover through rubble layer, coarse sand layer and vegetable layer in proper order, plays the effect with external intercommunication, and this part air is heated through the bottom of the pool, can not weaken the heat preservation cold-resistant effect in greenhouse.

Although the invention has been described in detail in the foregoing by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that certain modifications and improvements may be made thereto based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. A heat-insulating and cold-resistant biological detention pond is characterized by comprising a pond body;

the pond body includes the vegetable layer, the vegetable layer upper shield is equipped with transparent glass cover.

2. The temperature-maintaining, cold-resistant bioretention pond of claim 1 wherein the vegetation layer includes switchgrass and/or moss.

3. The heat-preservation and cold-resistance bioretention pond according to claim 1 or 2 wherein the height of the transparent glass cover is 40-60 cm.

4. The heat-insulating and cold-resistant bioretention pond according to claim 1 or 2 further comprising a water inlet pipe, a water conduit and a water outlet pipe;

the water inlet pipe is arranged in the unfrozen soil layer and comprises a far end and a near end, the far end is communicated with the sewage drain pipe, and the near end is communicated with the middle of the water guide pipe;

the upper end of the water guide pipe is communicated with the atmosphere and is higher than the water inlet pipe, and the lower end of the water guide pipe is communicated with the bottom of the pond body;

the water outlet pipe is communicated with the upper part of the tank body.

5. The bioretention pond according to claim 4 wherein the outlet pipe is located in a layer of unfrozen soil.

6. The bioretention pond of claim 1 or 2 wherein the pond body further includes a course of grit and a layer of crushed stone, the course of grit being below the vegetation layer and plants grown in the vegetation layer being rooted into the course of grit, the layer of crushed stone being below the course of grit.

7. The bioretention pond of claim 6 wherein a geotextile layer is disposed between the coarse sand layer and the gravel layer.

8. The heat-preservation and cold-resistance bioretention pond according to claim 6 wherein the thickness of the coarse sand layer is 50-70 cm, and the thickness of the gravel layer is 30-50 cm.

9. The heat-preservation and cold-resistance bioretention pond according to claim 6 wherein the upper surface of the coarse sand layer is 10-20 cm lower than the ground.

10. The heat-preservation and cold-resistance bioretention pond according to claim 6, wherein the particle size of the coarse sand in the coarse sand layer is 1-2 mm.

Images