CN218881126U

CN218881126U - Combined rainwater infiltration regulation and storage tank

Info

Publication number: CN218881126U
Application number: CN202223197908.5U
Authority: CN
Inventors: 王伟亚; 鲍韬; 张辉; 范信生; 吴可; 勾全增
Original assignee: Cecep Guozhen Environmental Protection Technology Co ltd
Current assignee: Cecep Guozhen Environmental Protection Technology Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-04-18
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a combined rainwater infiltration regulation and storage tank, which comprises a tank body positioned below a hardened ground, wherein an outside-tank infiltration area is filled between the outer side of the upper part of the tank body and the hardened ground; the outer infiltration zone of pond includes surrounds second filter screen, haydite layer, the smokeless coal seam in the cell body upper portion outside from inside to outside in proper order. The combined rainwater infiltration regulation and storage tank provided by the utility model can ensure normal delivery of dry season sewage, reduce the dilution of rainwater on sewage and reduce the influence on a sewage treatment plant when the dry season and the rainfall are less than the design interception multiple; when the rainfall exceeds the design interception multiple, the overflowed rainwater can directly enter the soil for plants to use or be used for supplementing urban water systems such as landscape water bodies and the like through simple purification of the infiltration area outside the pool. The permeable storage tank is simple in structure, small in occupied area, low in construction and maintenance cost, has storage, purification and storage effects, and contributes to rainwater utilization.

Description

Combined rainwater infiltration regulation and storage tank

Technical Field

The utility model relates to a water environment improvement field, especially a confluence system rainwater infiltration regulation pond.

Background

The combined drainage system adopts the drainage mode of conveying mixed liquor of rainwater and sewage by using the same pipeline, and utilizes the intercepting pipeline to convey partial mixed liquor of rainwater and sewage to a sewage treatment plant for treatment. Along with the increase of rainfall, when the collected rainwater flow exceeds the pipeline conveying capacity corresponding to the combined system design interception multiple, combined system drainage overflow is formed. The overflow pollution of a combined drainage system is one of the main factors causing the surface water pollution in China, and a combined regulation and storage tank is a key technology for controlling the combined overflow pollution and is adopted by a plurality of countries at present.

The regulation pond has certain ability of storing the dirty mixed liquid of rain when rainfall, and confluence system drainage gets into the short-term dwell of regulation pond and can reduce peak drainage flow, reduces drainage pipe's design pipe diameter and sewage treatment plant design scale. The pollution degree of the rain and sewage mixed liquid at the beginning of the drainage system is relatively low, but the peak flow is relatively high. For the drainage, larger regulation and storage volume is needed, the occupied area is large, the construction is difficult, and the combined drainage overflows from the regulation and storage tank and is directly discharged into the water body, so that the water environment pollution is still increased, and the water resource is wasted. Therefore, for the areas with insufficient urban floor space conditions, such as squares, parking lots and other civil construction places, a combined regulation and storage tank which can reduce the floor space, is simple to maintain and operate, and can store and purify overflow rainwater needs to be developed.

Disclosure of Invention

To the problem that above-mentioned prior art exists, the utility model aims to provide a confluence system rainwater infiltration regulation pond. And in dry seasons and when the rainfall is less than the designed interception multiple, the combined drainage flows into the regulation and storage tank through the water inlet pipe and then is directly connected into a municipal pipe network through the water outlet pipe and discharged into a sewage treatment plant for treatment. When the rainfall exceeds the design interception multiple, the rain and sewage mixed liquor is discharged in two ways, part of the rain and sewage mixed liquor is discharged into a sewage treatment plant through a water outlet pipe, part of the rain and sewage mixed liquor overflows to a seepage zone outside the storage tank through the upper part of the impervious wall of the storage tank, flows into soil after being filtered and purified through a ceramsite layer and a smokeless coal layer, and is simultaneously conveyed to urban water systems such as a landscape water body through a permeation pipe for recycling.

In order to achieve the above object, the utility model adopts the following technical scheme:

a combined rainwater infiltration regulation and storage tank comprises a tank body positioned below a hardened ground, wherein the tank body comprises a foundation and an impervious wall, the tank body is higher than the groundwater level, the impervious wall has the function of preventing sewage from infiltrating soil to pollute groundwater when the sewage concentration is higher in dry seasons, an outside-tank infiltration area is filled between the outer side of the upper part of the tank body and the hardened ground, and the bottom of the outside-tank infiltration area is 300-500 mm lower than the top of the impervious wall; the outer tank permeation area has the functions of buffering and filtering, part of water overflowing from the tank body is buffered in the outer tank permeation area, and part of water is filtered by the outer tank permeation area and then permeates into soil or is discharged into urban water systems such as landscape water bodies; wherein:

the two sides of the lower part of the tank body are respectively connected with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are embedded in soil, and the height of the water inlet pipe is higher than that of the water outlet pipe, so that sewage can flow out by means of gravity flow; a filter screen device is arranged in the tank body and positioned at the water outlet of the water inlet pipe; further, the filter screen device comprises a filter screen frame arranged on the side wall of the impervious wall and a first filter screen arranged in the filter screen frame, and the first filter screen is positioned at the water outlet end of the water inlet pipe.

The outside-tank permeation area comprises a second filter screen, a ceramsite layer and a smokeless coal layer which are surrounded on the outer side of the upper portion of the tank body from inside to outside, a permeation tube is buried in the anthracite coal layer, and a permeable geotextile is coated outside the permeation tube. Further preferably, the porosity of the permeation tube is 1% -3%, and the gradient meets the drainage requirement.

As a preferred technical scheme, the porosity of the ceramsite layer and the smokeless coal bed is 35% -50%, the water body overflowing out of the tank body is longer in path when water flows through the space between the filler particles due to certain porosity when the ceramsite layer and the smokeless coal bed pass through, and therefore overflow rainwater can be stored, and the water quality purification effect can be guaranteed. The storage volume of the pond body and the effective storage volume of the permeable area outside the pond are calculated according to a local rainstorm intensity formula, a design recurrence period and a cut-off multiple.

As a preferred technical scheme, the thickness of the ceramsite layer is 200-300 mm, the particle size of the ceramsite in the ceramsite layer is 20-30 mm, the ceramsite has high strength, large surface area and good adsorption capacity, and a certain water purification effect can be achieved in a permeation region outside the pool; the thickness of the smokeless coal layer is 300-500 mm, the grain diameter of the anthracite in the smokeless coal layer is 5-10mm, the anthracite has good chemical property, high mechanical strength and long service cycle, is insoluble in acid, neutral and alkaline water treatment and purification, has low uniformity coefficient, is beneficial to accelerating the flow rate, and ensures that water filtered by the ceramsite layer can smoothly permeate into the permeation tube or soil.

As a preferred technical scheme, a manhole is formed in the hardened ground, and the manhole is communicated with the interior of the pool body; a rope is installed in the manhole, and the bottom end of the rope is connected with the first filter screen.

The beneficial effects of the utility model reside in that:

the combined rainwater infiltration regulation and storage tank provided by the utility model can ensure normal delivery of dry season sewage, reduce the dilution of rainwater on sewage and reduce the influence on a sewage treatment plant when the dry season and the rainfall are less than the design interception multiple; when the rainfall exceeds the design interception multiple, the water body on the upper part of the pool body is generally clarified relatively to the water body on the lower part of the pool body, and the pollutant content is less, so that the overflowing rainwater can directly enter soil for plants to use through simple purification in the infiltration area outside the pool, and can also be used for supplementing urban water systems such as landscape water bodies, and the effects of reducing overflow pollution, reducing peak flow and improving the rainwater utilization degree are achieved. The permeable storage tank is simple in structure, small in occupied area, low in construction and maintenance cost, has storage, purification and storage effects, contributes to rainwater utilization, and is particularly suitable for areas with insufficient urban space conditions.

Drawings

Fig. 1 is a schematic structural view of a combined rainwater infiltration regulation pool provided by the utility model;

reference numerals: 1-pool body, 2-external infiltration zone of pool, 3-foundation, 4-impervious wall, 5-water inlet pipe, 6-water outlet pipe, 7-first filter screen, 8-filter screen frame, 9-second filter screen, 10-ceramsite layer, 11-smokeless coal bed, 12-permeable geotextile, 13-infiltration pipe, 14-soil, 15-manhole, 16-hardened ground and 17-rope.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings so that those skilled in the art can better understand the present invention and can carry out the present invention, but the examples are not intended to limit the present invention.

It should be noted that "mounting", "fixing", "connecting", etc. in the present invention all mean that two components connected to each other are fixed together, generally fixed together by welding, screws, etc., and it is obvious to those skilled in the art that the specific meaning of the above terms in the present invention can be understood according to specific situations.

It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used herein in a generic and descriptive sense only and not for purposes of limitation, and are not intended to limit the scope of the invention. The terms "first," "second," and the like, do not denote any particular order or quantity, but rather are used to distinguish one element from another.

Referring to fig. 1, in the embodiment of the utility model, a confluence system rainwater infiltration regulation pond, including cell body 1 and the outer infiltration district 2 of pond, cell body 1 comprises basis 3 and impervious wall 4, and the cell body sub-unit connection has inlet tube 5, outlet pipe 6, and the end of intaking in the pond is equipped with filter unit, and filter unit is including installing filter screen frame 8 on the impervious wall lateral wall and placing first filter screen 7 in filter screen frame, and first filter screen 7 is located the outlet end of inlet tube. The outer infiltration zone 2 surrounds the upper part of the tank body 1 and comprises a second filter screen 9, a ceramsite layer 10, a smokeless coal layer 11, a permeable geotextile 12 and at least 2 infiltration pipes 13, the permeable geotextile 12 is externally coated on the infiltration pipes 13 and is embedded in the smokeless coal layer 11, and the lower part of the outer infiltration zone 2 is 300-500 mm lower than the top of the impervious wall 4. The top parts of the tank body 1 and the outer permeable zone 2 are a hardened ground 16, a manhole 15 is arranged in the hardened ground, and the manhole 15 is communicated with the inside of the tank body 1; a rope 17 is installed in the manhole 15, and the bottom end of the rope 17 is connected with the first filter.

The pool body 1 is higher than the ground water level, and the rainwater overflowing from the pool body 1 in the external infiltration area 2 permeates into soil 14 or is discharged into urban water systems such as landscape water bodies; the height of the impervious wall 4 meets the storage capacity of the pool body 1 corresponding to the designed interception multiple of the storage pool, rainwater exceeding the interception multiple flows into the external permeable area 2 of the pool, the porosity of the external permeable area 2 is 35-50%, and the effective storage capacity meets the overflow rainwater amount within the rainfall duration; the pipe top of the water inlet pipe 5 is higher than that of the water outlet pipe 6, the water inlet pipe 5 and the water outlet pipe 6 are buried in soil 14, and sewage flows out by gravity flow; the aperture of the second filter screen 9 is smaller than the grain diameter of the ceramsite in the ceramsite layer 10, the grain diameter of the ceramsite is 20-30 mm, and the thickness of the ceramsite layer is 200-300 mm; the grain diameter of anthracite in the smokeless coal layer 11 is about 5-10mm, the thickness of the smokeless coal layer 11 is 300-500 mm, the porosity of the permeation tube 13 is 1% -3%, and the gradient meets the drainage requirement.

The utility model provides a confluence system rainwater infiltration regulation pond sets up below sclerosis ground 16, avoids ground runoff rainwater infiltration cell body 1 and influences the regulation purifying effect in the outer infiltration zone 2 in the pond. The impervious wall 4 is arranged to prevent sewage from infiltrating soil to pollute underground water when the sewage concentration is higher in dry seasons. The packing particle stacking porosity in the penetration zone 2 outside the pool is 35% -50%, and the path is longer when water flows through the space between the packing particles, so that the overflow rainwater can be stored, and the water quality purification effect can be ensured. The regulation volume of the tank body 1 and the effective water storage volume of the permeable area 2 outside the tank are calculated according to a local rainstorm intensity formula, a design reproduction period and a cut-off multiple. The selected ceramsite has high strength, large surface area and good adsorption capacity; the anthracite has good chemical property, high mechanical strength, long service cycle, no dissolution in acid, neutral and alkaline water treatment and purification, low uniformity coefficient and contribution to accelerating the flow rate.

When the combined type water-saving tank is used, the storage tank is arranged at the beginning or the middle of a drainage system, and combined drainage enters the tank body 1 through the water inlet pipe 5 at the water inlet end of the tank body 1 and the first filter screen 7 and the filter screen frame 8 after large particles, floating objects and the like are intercepted and removed. The mixed liquid of the dry season sewage in fine days and the rain and sewage when the rainfall is less than the designed rainfall is directly intercepted and conveyed to a town sewage treatment plant for treatment through the water outlet pipe 6. When the rainfall reaches the design rainfall capacity in rainy days, intercepting the rain and sewage mixed liquor within the designed interception multiple of the regulation and storage tank to a water outlet pipe 6 and conveying the water outlet pipe to a town sewage treatment plant; the cleaner rain and sewage mixed liquor which exceeds the design cut-off multiple flows through the anti-seepage wall 4 and enters the outside-pool seepage zone 2 through the second filter screen 9. The overflow mixed liquor stored in the pond outer infiltration area 2 gradually infiltrates downwards and outwards after rainfall. The rain and sewage mixed liquor is filtered by the ceramsite layer 10 in the penetration zone 2 outside the pool, enters the smokeless coal seam 11 for secondary filtration and purification, and then penetrates into the soil 14 for plants to utilize. The mixed liquid can be filtered again through the permeable geotextile 12 and enter the permeation tube 13 in the downward conveying process, and is conveyed to urban water systems such as landscape water bodies and the like through the permeation tube 13 to be used as supplementary water, so that the effects of rainwater infiltration, purification and recycling are achieved. When more impurities are accumulated to influence the interception effect, the first filter screen 7 and the filter screen frame 8 are lifted and pulled to the ground for cleaning through the manhole 15 lifting rope 17 in sunny days, and sludge at the bottom of the pool body 1 is pumped out through the pump.

The above-mentioned embodiments are only described for the preferred embodiments of the present invention, but not for limiting the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a confluence system rainwater infiltration regulation pond which characterized in that: the device comprises a tank body positioned below a hardened ground, wherein an outer-tank permeation area is filled between the outer side of the upper part of the tank body and the hardened ground; wherein:

the two sides of the lower part of the tank body are respectively connected with a water inlet pipe and a water outlet pipe, and the height of the water inlet pipe is higher than that of the water outlet pipe; a filter screen device is arranged in the tank body and positioned at the water outlet of the water inlet pipe; the filter screen device comprises a first filter screen arranged at the water outlet end of the water inlet pipe;

the outer infiltration zone of pond includes from inside to outside surrounds second filter screen, haydite layer, the anthracite layer in the cell body upper portion outside, bury the infiltration pipe in the anthracite layer, the infiltration pipe coats outward and is stamped the geotechnological cloth that permeates water.

2. The combined rainwater infiltration regulation and storage tank of claim 1, wherein: the bottom of the seepage zone outside the pool is 300-500 mm lower than the top of the impervious wall; the thickness of the ceramic particle layer is 200-300 mm; the thickness of the smokeless coal bed is 300-500 mm.

3. The combined rainwater infiltration regulation and storage tank of claim 1, wherein: the porosity of the ceramsite layer and the smokeless coal layer is 35-50%.

4. A combined rainwater penetration regulation pond according to any one of claims 1 to 3 wherein: the porosity of the penetration pipe is 1% -3%, and the gradient meets the drainage requirement.

5. The combined rainwater infiltration regulation and storage tank of claim 4, wherein: the pool body comprises a foundation and an impervious wall; the filter screen device further comprises a filter screen frame installed on the side wall of the impervious wall, and the first filter screen is placed in the filter screen frame.

6. The combined rainwater penetration regulation pond according to claim 5, wherein: a manhole is formed in the hardened ground and communicated with the interior of the tank body; a rope is installed in the manhole, and the bottom end of the rope is connected with the first filter screen.