CN218248991U

CN218248991U - Runoff treatment system

Info

Publication number: CN218248991U
Application number: CN202120972372.6U
Authority: CN
Inventors: 曹利勇; 王珺; 向运涛; 张辉; 刘祖杰; 庄伟�
Original assignee: Wuhan Wisco Green City Technology Development Co ltd
Current assignee: Wuhan Wisco Green City Technology Development Co ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2023-01-10
Anticipated expiration: 2031-05-08

Abstract

The utility model discloses a runoff processing system relates to runoff processing technology field, has solved the easy problem of blockking up and hardening, throughput limit of current runoff processing apparatus filled soil layer. The device comprises a coarse filtration system and a fine filtration system, wherein the coarse filtration system comprises a coarse filtration tank and a regulation and storage tank which are sequentially communicated, runoff is collected by the coarse filtration tank, a first filter screen is arranged in the coarse filtration tank, and a plurality of filtration mechanisms are arranged in the regulation and storage tank; the fine filtration system comprises a grit chamber, an inclined plate filter tank and a medium filter bed which are sequentially communicated, the grit chamber is communicated with the regulation and storage tank, the medium filter bed comprises a coarse stone layer, a fine stone layer and a medium soil layer which are sequentially arranged from bottom to top, and a blind pipe is arranged in the coarse stone layer; the medium soil layer comprises 60-90% of aggregate and 10-40% of coconut coir in percentage by volume. The utility model discloses a medium soil layer is difficult for hardening, active high, and then the throughput obtains promoting.

Description

Runoff treatment system

Technical Field

The utility model relates to a runoff processing field, in particular to runoff processing system.

Background

Most cities collect rainwater runoff or waterlogging flood by using a sewer pipe network and discharge the rainwater or the waterlogging flood to natural water areas, the runoff contains a large amount of TSS (Total suspended solids) and COD (Chemical Oxygen Demand), the self-treatment capacity of rivers and lakes is low, the urban ground runoff carrying garbage and pollutants cannot be borne, and in the past, water sources in the rivers and lakes are polluted, the biological treatment capacity is reduced, and the environment is damaged. Some city plans arrange biological detention facilities such as a rainwater garden and a sunken green land capable of storing rainwater in the city through the concept of a sponge city, but the filling layer of the facilities is easy to block and harden, the treatment capacity is limited, and a large amount of untreated runoff is directly discharged into a river or a lake through a sewer pipe network.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a long runoff processing system of runoff processing activity to solve the easy problem of blockking up and hardening, throughput of the current runoff processing apparatus filled soil layer that above-mentioned background art provided.

In order to realize the above purpose, the technical scheme of the utility model as follows:

a runoff treatment system comprising:

the rough filtration system comprises a rough filtration tank and a storage tank which are sequentially communicated, wherein the rough filtration tank collects runoff, a first filter screen is arranged in the rough filtration tank, and a plurality of filtration mechanisms are arranged in the storage tank;

the fine filtration system comprises a grit chamber, an inclined plate filter tank and a medium filter bed which are sequentially communicated, wherein the grit chamber is communicated with the storage tank, the medium filter bed comprises a coarse stone layer, a fine stone layer and a medium soil layer which are sequentially arranged from bottom to top, and a blind pipe is arranged in the coarse stone layer.

Preferably, the paving thickness of the coarse stone layer and the paving thickness of the medium soil layer are both larger than that of the fine stone layer.

Preferably, the rough stone layer is laid on the plain soil layer, the plain soil layer is tamped, and the tamping coefficient of the plain soil layer is not less than 95%.

Preferably, a permeable geotextile is arranged between the rough stone layer and the plain soil layer.

Preferably, a water diversion weir is arranged in the grit chamber close to the inclined plate filter tank.

Preferably, the swash plate filter-tank includes the cell body, is equipped with the filter in the cell body, the filter slope sets up, be equipped with a plurality of filtration pores on the filter, the percent opening of filter is not less than 3%.

Preferably, still include biological treatment system, biological treatment system sets up in the delivery port of blind pipe, biological treatment system includes pond and vegetation.

Preferably, a water outlet pipe is further arranged in the water tank and communicated with the grit chamber.

The utility model has the advantages that:

solid matters with larger size in the runoff are filtered through the rough filtering system and then sequentially pass through the grit chamber and the inclined plate filter tank to treat the runoff, the solid matters in the runoff and pollutants attached to the solid matters are intercepted, the treatment pressure of the medium filter bed is greatly reduced, the activity of the medium soil layer is further ensured, and the service life of the medium soil layer is prolonged;

mix the coconut husk in the medium soil layer, the coconut husk surface is irregular and has certain hardness, makes the medium soil layer can keep loose state for a long time, is difficult for blockking up and hardening, and then guarantees the activity of medium soil layer, and then the throughput of medium soil layer obtains promoting.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a media filter bed according to embodiment 1 of the present invention.

The mark in the figure is: 101-storage pond, 1011-rotary filter screen, 201-sand basin, 2011-diversion weir, 202-inclined plate filter tank, 2021-filter plate, 2022-overflow weir, 203-medium filter bed, 2031-medium soil layer, 2032-fine stone layer, 2033-coarse stone layer, 2034-blind pipe, 2035-plain soil layer, 2036-permeable geotextile, 304-water pool, 3041-vegetation.

Detailed Description

The technical solutions in the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, which should not be construed as limiting the present invention to the specific embodiments, but are for explanation and understanding only:

as shown in fig. 1 and 2, the present embodiment provides a runoff treatment system, which includes a coarse filtration system, a fine filtration system, and a biological treatment system.

Urban rainwater pipe networks are connected in a large number, the TSS and COD content in runoff is high, and untreated runoff is easy to cause blockage of a subsequent filtering system, so that a rough filtering system is used as a pretreatment system to carry out primary treatment on the runoff.

The rough filtration system comprises a rough filtration tank and a regulation and storage tank 101 which are sequentially communicated, runoff collected by the rainwater pipe network enters the rough filtration tank, a first filter screen is arranged in the rough filtration tank and used for intercepting garbage, fragments and solid with large particle size, and the first filter screen is cleaned regularly. Still can set up a plurality of filter screens along the direction that the interior runoff of rough filter pond flows, the mesh of a plurality of filter screens diminishes in proper order along the runoff direction of flow, filters many times to the TSS in the runoff, reduces first filter screen filtration pressure, can increase the interval time of regularly clearing up the filter screen correspondingly. The filtered runoff in the rough filtering tank flows into the regulating and storage tank 101, the regulating and storage tank 101 is used for precipitating suspended matters in the runoff, and the volume of the regulating and storage tank 101 also provides effective settling time for the regulating and storage tank 101. Be equipped with a plurality of filter mechanisms in the regulation pond 101, filter mechanism is for having the filter equipment that can filter miniature floating garbage, deposit and piece, if filter screen or rotation filter screen 1011, this embodiment adopts rotation filter screen 1011, further promotes the effect of getting rid of to TSS in the runoff, reduces the manual operation degree of difficulty. When the flow of the runoff to be treated is large, the volume of the regulating and storing tank 101 is correspondingly large, wherein when the water surface area of the regulating and storing tank 101 is large, the number of the rotary filter grids 1011 arranged in the regulating and storing tank 101 is increased, so that the TSS removing effect is improved.

The fine filtration system comprises a grit chamber 201, an inclined plate filter tank 202 and a medium filter bed 203 which are sequentially communicated, wherein the grit chamber 201 is communicated with a regulation and storage tank 101, and the filtered runoff in the regulation and storage tank 101 enters the grit chamber 201 for preliminary sedimentation. A diversion weir 2011 is arranged at one end, close to the inclined plate filter tank 202, in the grit chamber 201, the diversion weir 2011 divides the grit chamber 201 into a settling zone and a storage zone, and runoff overflowing from the diversion weir 2011 enters the storage zone and then enters the inclined plate filter tank 202 for further filtering and settling. The swash plate filter tank 202 includes the cell body, be equipped with the filtration swash plate in the cell body, filter the filter 2021 that the swash plate includes the slope setting, be equipped with a plurality of filtration pores on the filter 2021, the filtration pore can further filter the solid matter in the runoff, and the filter 2021 slope, it is big with the area of contact of runoff, under the certain circumstances in cell body space, can improve filtration efficiency, and because the pollutant is attached to the solid matter surface more, swash plate filter tank 202 can not only effectively reduce the TSS content in the runoff, can also reduce the COD of runoff.

An overflow weir 2022 is arranged at one end of the tank body far away from the grit chamber 201, and the filtered runoff enters the medium filter bed 203 through the overflow weir 2022. In this embodiment, the bottom of the tank bottom is provided with a plurality of water inlet pipes, and is connected with the same main water pipe, and the main water pipe is communicated with the storage area through a water pump, and when runoff enters the water inlet pipe through the main water pipe, the flow rate becomes slow, and the flow rate entering the tank body is reduced again, so that solid matters in the runoff can be prevented from flowing out of the filter holes under the assistance of water flow.

The medium filter bed 203 comprises a coarse stone layer 2033, a fine stone layer 2032 and a medium soil layer 2031 which are sequentially arranged from bottom to top, a blind pipe 2034 is arranged in the coarse stone layer 2033, the coarse stone layer 2033 is paved on a plain soil layer 2035, the plain soil layer 2035 is tamped, and the tamping coefficient of the plain soil layer 2035 is not less than 95% so that more runoff can flow out of the blind pipe 2034. A permeable geotextile 2036 is arranged between the rough stone layer 2033 and the plain soil layer 2035 to isolate the soil of the plain soil layer 2035 from the rough stone layer 2033. The runoff is filtered sequentially by the medium soil layer 2031, the fine stone layer 2032 and the coarse stone layer 2033 into the blind pipe 2034 and finally flows out of the medium filter bed 203.

The thickness of laying of coarse stone layer 2033 and medium soil layer 2031 all is greater than the thickness of laying of fine stone layer 2032, and in this embodiment, the thickness ratio that coarse stone layer 2033, fine stone layer 2032 and medium soil layer 2031 were laid is 8, and the thickness that changes promotion medium soil layer 2031 can increase the detention time of runoff in the medium layer, promotes the treatment effect.

The fine stone layer 2032 is formed by mixing gravels with the grain size of 0.3 mm-9.5 mm, the fine stone layer 2032 is mainly used for blocking the soil falling of the medium soil layer 2031, the coarse stone layer 2033 is formed by mixing gravels with the grain size of 9.5 mm-19 mm, the thickness of the coarse stone layer 2033 is 1.5 times of the diameter of the blind pipe 2034, the size of the coarse stone layer 2033 is large so that the coarse stone layer 2033 has certain water storage capacity, the moving speed of fluid in the coarse stone layer 2033 is high, the runoff processed by the medium soil layer 2031 can flow out of the medium soil layer 1 in time, the processing efficiency of the medium soil layer 2031 is improved, the stored water is positioned at the lower part of the coarse stone layer 2033 and is finally discharged by the blind pipe 2034.

The medium soil layer 2031 comprises 60 to 90 volume percent of aggregate and 10 to 40 volume percent of coconut coir.

The aggregate comprises gravel and volcanic sand with the grain diameter of 0.075 mm-9.5 mm, wherein the gravel with the grain diameter of 0.075 mm-9.5 mm comprises the following components in percentage by volume: 0 to 10 percent of gravels with the grain diameter of 4.75 to 9.5mm, 5 to 55 percent of gravels with the grain diameter of 2.36 to 4.75mm, 0 to 76 percent of gravels with the grain diameter of 1.18 to 2.36mm, 9 to 45 percent of gravels with the grain diameter of 0.6 to 1.18mm, 0 to 18 percent of gravels with the grain diameter of 0.3 to 0.6mm, 0 to 10 percent of gravels with the grain diameter of 0.15 to 0.3mm and 0 to 7 percent of gravels with the grain diameter of 0.075 to 0.15 mm.

In the proportioning process, different medium soil layers 2031 are proportioned according to the average TSS and average COD content of the runoff in the area. If the average TSS and the average COD are high, the proportion of gravels with the particle size of less than 1.18mm is increased to prolong the retention time of runoff in the medium soil layer 2031, and the medium soil layer 2031 is lifted to filter and oxidize COD and NH ₄ ⁺ The effect of (2); if the average TSS and the average COD are low, the proportion of gravels with the grain diameter of more than 1.18mm is increased, and COD and NH are filtered and oxidized in the soil layer 2031 of the maintaining medium ₄ ⁺ The effect is simultaneously, the retention time of the runoff in the medium soil layer 2031 is shortened, and the activity of microorganisms in the medium soil layer 2031 is kept.

The coconut chaff comprises 85-95% of coconut shells and 5-15% of coconut shred fibers in percentage by volume; the particle size of the coconut shell is not more than 1.5mm, and the length of the coconut fiber is 15 mm-25 mm. The coconut husk is made of natural materials, the surface of the coconut husk is irregular and has certain hardness, so that the medium soil layer 2031 can be kept loose and is not easy to harden, a better living environment is provided for microorganisms, gravel hardening is avoided, and runoff treatment effect is reduced.

The biological treatment system is arranged at the water outlet of the blind pipe 2034 and comprises a water tank 304 and vegetation 3041, wherein the depth of the water tank 304 is not less than 1m, so that the water body is kept healthy.

Utility model people discover in the application, pond 304 also can absorb the runoff that does not pass through the processing around the pond 304, if long-time not precipitation, pond 304 among the biological treatment system is because a large amount of moisture evaporation, and the pollutant concentration in the pond 304 risees, and the floater increases, and vegetation 3041 living environment is poor to survival of vegetation 3041, and biological treatment system's ecology can cause destruction, is unfavorable for follow-up processing to the runoff.

Therefore, the water tank 304 is also provided with a water outlet pipe which is communicated with the grit chamber 201, and during the period of no rainfall, the water in the water body of the biological treatment system is pumped into the fine filtration system through a water pump for circular filtration, so as to filter solid matters and reduce the content of TSS and COD in the water. The circulation filtration not only ensures the health of the water in the water tank 304, but also continuously provides water source for the medium soil layer 2031, so that the microorganisms in the medium soil keep activity. From the energy saving concept, the flow rate of the water pumped by the water pump in the water pool 304 is less than that of the rainfall runoff, so as to avoid exceeding the upper limit of the treatment capacity of the medium soil layer 2031.

Utility model people still discover that city ecological landscape can also regard as a part of biological treatment system, not only beautifies the environment, can also use the runoff through handling nearby. Therefore, this embodiment has add chlorine disinfection contact chamber, and the partial runoff of extraction gets into chlorine disinfection contact chamber disinfection and sterilization back, uses as city ecological landscape's water source again, promotes the security.

It is to be understood that the above examples are merely illustrative for clarity of description and are not limiting on the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.

Claims

1. A runoff treatment system, comprising:

the system comprises a coarse filtration system and a secondary filtration system, wherein the coarse filtration system comprises a coarse filtration tank and a storage tank which are sequentially communicated, runoff is collected by the coarse filtration tank, a first filter screen is arranged in the coarse filtration tank, and a plurality of filtration mechanisms are arranged in the storage tank;

2. The runoff treatment system of claim 1 wherein the coarse stone layer and the media soil layer are each laid to a thickness greater than the thickness of the fine stone layer.

3. The runoff treatment system of claim 2 wherein the coarse rock layer is laid on a subsoil layer, the subsoil layer being tamped, the subsoil layer having a tamping coefficient of not less than 95%.

4. A runoff treatment system according to claim 3 wherein a water permeable geotextile is disposed between said coarse stone layer and said plain soil layer.

5. The runoff treatment system of claim 1 wherein a weir is disposed within the grit chamber proximate the inclined plate filter trough.

6. The runoff treatment system of claim 1 wherein the inclined plate filter tank comprises a tank body, a filter plate is arranged in the tank body, the filter plate is arranged obliquely, the filter plate is provided with a plurality of filter holes, and the aperture ratio of the filter plate is not lower than 3%.

7. The runoff treatment system of claim 1 further comprising a biological treatment system disposed at the outlet of the blind, the biological treatment system including a pond and vegetation.

8. A runoff treatment system according to claim 7 wherein a water outlet pipe is also provided in the basin, the water outlet pipe being in communication with the grit chamber.