CN218924068U - Multifunctional rain sewage treatment system - Google Patents

Abstract

The utility model relates to the technical field of sewage and rainwater purification, and discloses a multifunctional rainwater and sewage treatment system, which at least comprises the following components: a regulating reservoir; the sewage treatment device is communicated with the regulation and storage tank, is suitable for receiving and treating sewage from the regulation and storage tank, and discharges the treated sewage into a receiving water body of an external environment; the flow stabilizing device is communicated with the regulating and accumulating tank, the sewage treatment device and the receiving water body, is suitable for collecting sewage flowing into the regulating and accumulating tank and/or the receiving water body, and continuously and stably conveys the collected sewage to the sewage treatment device at a preset flow. According to the utility model, the flow stabilizing device is arranged to collect sewage flowing in from the regulating reservoir and/or the receiving water body, so that the sewage can be stabilized and continuously and stably conveyed to the sewage treatment device at a preset flow, and the excessive impact load on the sewage treatment device due to the large sewage flow is avoided; or the free waste of treatment facilities caused by no runoff pollution of water in non-rainy seasons can further improve the water quality of the water body and improve the water environment.

Description

Multifunctional rain sewage treatment system

Technical Field

The utility model relates to the technical field of sewage and rainwater purification, in particular to a multifunctional rainwater and sewage treatment system.

Background

In urban water environment comprehensive remediation, split-system initial rainwater, CSOs sewage (combined-system overflow sewage) and direct-drainage sewage are main pollution sources of river channels.

The initial rainwater is used for dissolving pollutants in the air in the falling process of the rainwater at the initial stage of rainfall, and flushing the roof and the ground after falling, so that the initial rainwater contains a large amount of pollutants, and if the initial rainwater is directly discharged into a receiving water body such as a river and a lake, the periodic pollution of the water body can be caused.

The CSOs sewage has the characteristics of non-continuity, explosiveness and randomness, and is often mixed with runoff pollution caused by precipitation and pipeline bottom mud carried by scouring, so that the damage to water environment is large, and therefore, the CSOs sewage is required to be intercepted, the pollution is reduced and then discharged.

Because the change range of the water quantity and the water quality of the CSOs sewage is larger, and the discontinuous characteristics exist, if the CSOs sewage is directly treated, the requirements of stable impact resistance and water outlet effect in the CSOs sewage treatment process are difficult to ensure; in addition, CSOs sewage is only generated in rainy seasons, and the treatment equipment can have an idle problem in non-rainy seasons. Therefore, the problems of poor impact load resistance, intermittent operation of a biochemical system, empty treatment facilities and the like of the CSOs sewage treatment process in the prior art are to be comprehensively solved.

Disclosure of Invention

Therefore, the utility model aims to solve the technical problems of poor impact load resistance, intermittent operation of a biochemical system, empty treatment facilities and the like of the CSOs sewage treatment process in the prior art.

To this end, the present utility model provides a multifunctional sewage treatment system, which at least includes:

a regulating reservoir;

the sewage treatment device is communicated with the regulating and storing tank, is suitable for receiving and treating sewage from the regulating and storing tank and discharging the treated sewage into a receiving water body of an external environment;

the flow stabilizing device is communicated with the regulating and accumulating tank, the sewage treatment device and the receiving water body, and is suitable for collecting sewage flowing into the regulating and accumulating tank and/or the receiving water body and continuously and stably conveying the collected sewage to the sewage treatment device at a preset flow.

Optionally, the flow stabilizing device comprises a water collecting tank and a hydraulic lifting mechanism;

the water collecting tank is communicated with the regulating and accumulating tank, the sewage treatment device and the receiving water body;

the hydraulic lifting mechanism is communicated with the water collecting tank and is suitable for lifting and discharging sewage in the water collecting tank to the sewage treatment device.

Optionally, the water collecting tank is connected with the regulating and accumulating tank through a first connecting pipe;

the water collecting tank is connected with the receiving water body through a second connecting pipe;

the water collecting tank is connected with the sewage treatment device through a third connecting pipe;

the interface position of the second connecting pipe and the water collecting tank is higher than the interface position of the first connecting pipe and the water collecting tank.

Optionally, the current stabilizer further comprises:

the separating wall extends from the top wall of the water collecting tank to the bottom wall of the water collecting tank, a set distance is reserved between the separating wall and the bottom wall of the water collecting tank, and the bottom wall of the separating wall is lower than the interface between the first connecting pipe and the water collecting tank;

the dividing wall divides the water collecting tank into a first water collecting area and a second water collecting area, the bottoms of the first water collecting area and the second water collecting area are communicated with each other, the first water collecting area is communicated with the regulating reservoir, and the second water collecting area is communicated with the receiving water body;

the hydraulic lifting mechanism is communicated with the second water collecting area.

Optionally, the hydraulic lifting mechanism comprises a lifting pump and a lifting pipe;

the water inlet of the lifting pump is connected with the lifting pipe, and the water outlet of the lifting pump is connected with the third connecting pipe;

one end of the lifting pipe far away from the lifting pump is inserted in the second water collecting area, and the water inlet of the lifting pipe is lower than the bottom wall of the dividing wall.

Optionally, the pipe diameter size of the lifting pipe is smaller than the pipe diameter size of the second connecting pipe.

Optionally, control valves are disposed on the first connecting pipe and the second connecting pipe.

Optionally, the control valve arranged on the first connecting pipe is an electric valve;

the control valve arranged on the second connecting pipe is an electric control valve and can adjust the flow of sewage in the second connecting pipe;

and a flowmeter is arranged on the second connecting pipe.

Optionally, the liquid level in the regulating reservoir is higher than the liquid level of the receiving water body.

Optionally, a stirrer is arranged in the regulating reservoir.

Optionally, the multifunctional rain water treatment system further comprises:

and the diversion well is communicated with the regulating and accumulating tank and the first water collecting area.

Optionally, the sewage treatment device includes:

the sludge filtering and depositing device is suitable for carrying out high-density sludge filtering and depositing on sewage flowing through so as to treat COD, TP and SS in the sewage.

Optionally, the sewage treatment device further comprises:

the nitrifying pond is arranged at the downstream of the sludge filtering and settling device and is suitable for nitrifying the water discharged by the sludge filtering and settling device.

The technical scheme of the utility model has the following advantages:

1. the multifunctional rain sewage treatment system provided by the embodiment of the utility model can treat sewage from the regulating reservoir through the sewage treatment device; meanwhile, through the arrangement of the flow stabilizing device, sewage flowing in from the regulating reservoir and/or the receiving water body can be collected, and the sewage is continuously and stably conveyed into the sewage treatment device at a preset flow after being stabilized and slowly flowed, so that the situation that the sewage treatment device is excessively impacted and loaded due to the fact that the sewage flow is large or the water outlet effect is unstable due to the fact that the sewage flow is small is avoided.

2. According to the utility model, the interface position of the second connecting pipe and the water collecting tank is higher than the interface position of the first connecting pipe and the water collecting tank, so that sewage flowing into the water collecting tank from the regulating and accumulating tank through the first connecting pipe can be prevented from flushing and filling into the second connecting pipe, and the sewage is prevented from directly flowing into the receiving water body through the second connecting pipe without being treated by the sewage treatment device, so that the receiving water body is prevented from being polluted.

3. According to the utility model, by arranging the dividing wall, sewage from the regulating reservoir and/or the receiving water body is flushed into the water collecting tank, part of sewage is impacted on the dividing wall, and the dividing wall stabilizes and slowly flows the sewage flushed into the water collecting tank; simultaneously, the diapire of dividing wall is less than first connecting pipe with the interface setting of catch basin can prevent to flow in the sewage scour of catch basin by the regulation pond through first connecting pipe and pour into in the second connecting pipe.

4. The stirrer is arranged in the regulating and storing tank, the regulating and storing tank can be used as a front-end denitrification tank, part of effluent of the sewage treatment device is returned to the regulating and storing tank, and the stirrer is started to stir and mix so as to remove part of total nitrogen.

5. The nitrifying pond in the embodiment of the utility model is a nitrifying biological filter, the microorganism growth condition in the nitrifying pond requires continuous and stable sewage flowing into the nitrifying pond, and the current stabilizer in the implementation can ensure that the sewage is continuously and stably introduced into the sewage treatment device at a preset flow, so that the discontinuous of CSOs sewage is avoided to cause adverse effect on subsequent nitrifying treatment, and the continuous operation of the multifunctional rain sewage treatment system is realized.

6. The multifunctional rain sewage treatment system can treat the CSOs sewage to three standards of the ground surface class; under the condition that the overflow amount of the CSOs sewage is small or no overflow exists, the multifunctional rain sewage treatment system can treat water receiving bodies such as rivers and lakes, and the like, improve the water quality and the ecological environment of surrounding water, and improve the self-cleaning capacity of the multifunctional rain sewage treatment system; in addition, the empty space of the sewage treatment device can be avoided, and especially the influence of the empty space of the nitrifying pond on microorganisms is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a multifunctional rain water treatment system in one view;

fig. 2 is a schematic structural view of the multifunctional sewage treatment system at another view angle.

Reference numerals illustrate:

100. a receiving body of water;

1. a regulating reservoir; 11. a shunt well;

2. a current stabilizer; 21. a hydraulic lifting mechanism; 211. a lift pump; 212. a riser; 22. a dividing wall; 23. a first water collection zone; 24. a second water collection zone;

3. a sewage treatment device; 31. a sludge filtering and depositing device; 32. a nitrifying pond;

41. a first connection pipe; 42. a second connection pipe; 43. an electric valve; 44. an electric control valve; 45. a flow meter; 46. a third connection pipe; 47. and a fourth connecting pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

FIG. 1 is a schematic view of a multifunctional rain water treatment system in one view; fig. 2 is a schematic structural view of the multifunctional sewage treatment system at another view angle.

As shown in fig. 1 to 2, the embodiment of the utility model provides a multifunctional rain sewage treatment system, which at least comprises a regulating reservoir 1, a sewage treatment device 3 and a flow stabilizer 2; specifically, the sewage treatment device 3 is communicated with the regulation tank 1, and under the condition that the sewage flow rate is normal, the sewage from the regulation tank 1 can be received and treated by the sewage treatment device 3, and the treated sewage is discharged into the receiving water body 100 of the external environment; the flow stabilizer 2 is communicated with the regulating reservoir 1, the sewage treatment device 3 and the receiving water body 100, when the sewage flow is larger or smaller, the flow stabilizer 2 can collect the sewage flowing into the regulating reservoir 1, the receiving water body 100 or both the regulating reservoir 1 and the receiving water body 100 as required, and continuously and stably convey the collected sewage to the sewage treatment device 3 at a preset flow.

The multifunctional rain sewage treatment system in the embodiment of the utility model can treat sewage from the regulating reservoir 1 through the sewage treatment device 3; meanwhile, by arranging the flow stabilizing device 2, sewage flowing in the regulating and accumulating tank 1 and/or the receiving water body 100 can be collected, and the sewage is continuously and stably conveyed into the sewage treatment device 3 at a preset flow after being stabilized and slowly flowed, so that overlarge impact load on the sewage treatment device 3 caused by larger sewage flow or unstable water outlet effect caused by smaller sewage flow can be avoided.

Optionally, the flow stabilizer 2 comprises a water collecting tank and a hydraulic lifting mechanism 21; the water collecting tank is communicated with the regulating and accumulating tank 1, the sewage treatment device 3 and the receiving water body 100; the hydraulic lifting mechanism 21 is communicated with the water collecting tank and is suitable for lifting and discharging sewage in the water collecting tank to the sewage treatment device 3. Optionally, the water collecting tank is connected with the regulating reservoir 1 through a first connecting pipe 41; the water collecting tank is connected with the receiving water body 100 through a second connecting pipe 42; the water collecting tank is connected with the sewage treatment device 3 through a third connecting pipe 46; wherein, the interface position of the second connecting pipe 42 and the water collecting tank is higher than the interface position of the first connecting pipe 41 and the water collecting tank. By setting the interface between the second connection pipe 42 and the water collection tank at a position higher than the interface between the first connection pipe 41 and the water collection tank, the sewage flowing into the water collection tank from the storage tank 1 through the first connection pipe 41 can be prevented from flushing and filling into the second connection pipe 42, and the sewage is prevented from flowing into the receiving water body 100 directly through the second connection pipe 42 without being treated by the sewage treatment device 3, so that the receiving water body 100 is prevented from being polluted.

Optionally, the flow stabilizer 2 further includes a partition wall 22, where the partition wall 22 extends from a top wall of the water collecting tank to a bottom wall of the water collecting tank, and has a set distance from the bottom wall of the water collecting tank, and the bottom wall of the partition wall 22 is lower than an interface between the first connecting pipe 41 and the water collecting tank; the dividing wall 22 divides the water collecting tank into a first water collecting area 23 and a second water collecting area 24, the bottoms of the first water collecting area 23 and the second water collecting area 24 are communicated with each other, the first water collecting area 23 is communicated with the regulating reservoir 1 through a first connecting pipe 41, and the second water collecting area 24 is communicated with the receiving water body 100 through a second connecting pipe 42; the hydraulic lifting mechanism 21 communicates with the second water collection area 24.

So set up, through setting up the dividing wall 22, from in the sewage scour entering catch basin of regulation pond 1 and/or receiving water body 100, partial sewage strikes dividing wall 22 on, dividing wall 22 carries out stationary flow, slow flow to the sewage that scour got into in the catch basin simultaneously, dividing wall 22 diapire be less than first connecting pipe 41 with the interface setting of catch basin, can prevent to flow in the sewage scour of catch basin by regulation pond 1 through first connecting pipe 41 and pour into in the second connecting pipe 42.

Optionally, the hydraulic lifting mechanism 21 comprises a lift pump 211 and a lift pipe 212; the water inlet of the lifting pump 211 is connected with the lifting pipe 212, and the water outlet of the lifting pump 211 is connected with the third connecting pipe 46; the end of the lifting pipe 212 far away from the lifting pump 211 is inserted in the second water collecting area 24, and the water inlet of the lifting pipe 212 is lower than the bottom wall of the dividing wall 22.

Optionally, the lift pump 211 pumps water by using a variable frequency system to stably output sewage to the sewage treatment apparatus 3, so as to ensure the stable operation of the sewage treatment apparatus 3.

Optionally, the pipe diameter of the riser 212 is smaller than the pipe diameter of the second connecting pipe 42.

Optionally, control valves are disposed on the first connection pipe 41 and the second connection pipe 42.

Alternatively, the control valve provided on the first connecting pipe 41 is an electric valve 43; the control valve arranged on the second connecting pipe 42 is an electric control valve 44, and the flow of the sewage in the second connecting pipe 42 can be regulated; the second connecting pipe 42 is provided with a flow meter 45. Optionally, the sewage treatment system is provided with a total flow meter, and has a linkage relationship with the electric regulating valve 44 and the flow meter 45, so that the total flow is controlled within a reasonable range.

Optionally, the liquid level in the regulating reservoir 1 is higher than the liquid level of the receiving water body 100.

Optionally, a stirrer is arranged in the regulating reservoir 1. So set up, regulation pond 1 can take into account as front end denitrification pond 32, flows back sewage treatment plant 3 part play water to regulation pond 1, starts the agitator stirring and mixes in order to get rid of partial total nitrogen.

Optionally, the multifunctional rain water treatment system further comprises a diversion well 11, wherein the diversion well 11 is communicated with both the regulating reservoir 1 and the first water collecting area 23. Optionally, the diverter well is in communication with the first water collection zone via a fourth connecting tube 47.

Optionally, the sewage treatment apparatus 3 comprises a sludge filtering and settling device 31, and the sludge filtering and settling device 31 is suitable for filtering and settling high-density sludge in sewage flowing through. The high-density sludge in the sewage is filtered and deposited by the sludge filtering and depositing device 31, so that COD (chemical oxygen demand), TP (total phosphorus), SS (concentration of activated sludge in the mixed liquor) and the like in the sewage can be removed. Optionally, after the sewage is filtered and precipitated by the sludge filtering and precipitating device 31, the total phosphorus concentration in the sewage is reduced to be in the range of 0.15mg/l to 0.25mg/l, and the SS concentration is reduced to be 8mg/l to 12mg/l or below. Preferably, the total phosphorus concentration is controlled to be about 0.2mg/l and the SS is controlled to be less than 10 mg/l.

Optionally, the sludge filtering and settling device 31 adopts a self-circulation high-density suspended sludge filtering and settling device to treat the CSOs sewage, has the characteristics of large single treatment capacity, small occupied area and remarkable water outlet effect, and is convenient to operate, quick to start, instant in use and high in automation degree.

Optionally, the sewage treatment apparatus 3 further includes a nitrification tank 32, where the nitrification tank 32 is disposed downstream of the sludge filtering and settling apparatus 31, and is adapted to perform further nitrification reaction treatment on the water body discharged from the sludge filtering and settling apparatus 31. The nitrification reaction treatment is carried out on the sewage from the sludge filtering and settling device 31 through the nitrification tank 32, so that the total phosphorus concentration can be stably reduced to 0.2mg/l or less, the ammonia nitrogen concentration can be stably reduced to 1mg/l or less, and the COD concentration can be stably reduced to 30mg/l or less, so that the effluent reaches three emission standards of the ground surface class.

Of course, after the sewage is filtered and precipitated by the sludge filtering and precipitating device 31, the sewage can be directly discharged into the receiving water body 100 to avoid the nitrification reaction treatment operation, and the skilled person can flexibly adjust the treatment degree according to the self-cleaning capability of the receiving water body 100 or the local related discharge standard, which is not limited in this embodiment.

The nitrification tank 32 in the embodiment of the utility model is a nitrification biological filter, and the microorganism growth condition in the nitrification tank 32 requires that sewage flowing into the nitrification tank 32 is continuously stable, and the current stabilizer 2 in the implementation can ensure that sewage is continuously and stably introduced into the sewage treatment device 3 at a preset flow, so that the adverse effect on the subsequent nitrification treatment caused by the discontinuity of the CSOs sewage is avoided, and the continuous operation of the multifunctional rain sewage treatment system is realized.

Optionally, the specific application situation and the operation process of the multifunctional rain sewage treatment system in the embodiment of the utility model are as follows:

in the first case, when the CSOs sewage is sufficient in rainy seasons:

the electric valve 43 is opened, and the electric regulating valve 44 is closed. At this time, the sewage in the flow stabilizer 2 comes from the CSOs sewage in the regulating reservoir 1, and is stably conveyed to the sewage treatment apparatus 3 for treatment by the hydraulic lifting mechanism 21.

In case two, when CSOs wastewater is reduced and the treatment load is not reached:

simultaneously, the electric valve 43 and the electric regulating valve 44 are opened, and the opening of the electric regulating valve 44 is regulated according to the gap of the treatment capacity of the sewage treatment device 3 until the flow pointer on the flowmeter 45 meets the actual flow demand. So the water backflow of the receiving water body 100 can be utilized to be compensated into the flow stabilizing device 2, and the water is properly treated by the sewage treatment device 3, so that the water outlet stability of the sewage treatment device 3 is ensured.

Case three, when dry season or no CSOs sewage:

the electric valve 43 is closed, and the electric control valve 44 is adjusted to the fully open state. At this time, the sewage in the flow stabilizer 2 comes from the receiving water body 100, and the hydraulic lifting mechanism 21 lifts the sewage into the sewage treatment device 3 for treatment, so that the water quality in the receiving water body 100 can be further lifted, and the ecological environment of surrounding water can be improved; and can satisfy the normal metabolism needs of microorganism in the nitrifying pond 32, maintain the normal operation of nitrifying pond 32, avoid the processing system empty to cause the investment extravagant.

Case four, during stormwater:

the electric valve 43 is opened, and the electric regulating valve 44 is regulated to a fully opened state, so that the sewage in the regulating reservoir 1 is directly discharged into the receiving water body 100 through the first connecting pipe 41, the water collecting tank and the second connecting pipe 42. Since the process peak of the sewage treatment apparatus 3 is exceeded during a heavy rain, the hydraulic lifting mechanism 21 can be operated or suspended according to the actual situation to prevent waterlogging.

Case five: treating initial rainwater:

when rainfall occurs, the electric valve 43 is closed, the diversion well 11 discharges the collected initial rainwater into the regulation and storage tank 1, and the pollution of the initial rainwater surface source is reduced; when the regulating reservoir 1 is full, the initial rainwater overflows from the diversion well 11 directly into the flow stabilizer 2 through the fourth connecting pipe 47, and is discharged into the receiving water body 100 through the flow stabilizer 2;

after the rain is stopped, the electric valve 43 is opened, initial rainwater in the regulating reservoir 1 enters the water collecting tank through the first connecting pipe 41, is conveyed to the sewage treatment device 3 for treatment through the hydraulic lifting mechanism 21, and is discharged into the receiving water body 100;

after the initial rainwater treatment is completed, the electric valve 43 is closed, and the electric regulating valve 44 is opened at the same time, so that the water quality in the receiving water body 100 is further improved by carrying out backflow sewage treatment on the receiving water body 100, and the ecological environment of surrounding water is improved.

The sewage treatment process in the embodiment of the utility model can treat the CSOs sewage to three standards of the ground surface class; under the condition that the overflow amount of the CSOs sewage is small or no overflow exists, the multifunctional rain sewage treatment system in the embodiment can treat the receiving water bodies 100 such as rivers and lakes, improve the water quality and the ecological environment of surrounding water, and improve the self-cleaning capacity of the receiving water bodies; in addition, the empty space of the sewage treatment device 3, in particular, the influence of the empty space of the nitrification tank 32 on microorganisms can be avoided.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present utility model.

Claims (13)

1. A multifunctional rain sewage treatment system, comprising at least:

a regulating reservoir (1);

the sewage treatment device (3) is communicated with the regulating and storing tank (1), and is suitable for receiving and treating sewage from the regulating and storing tank (1) and discharging the treated sewage into a receiving water body (100) of an external environment;

the flow stabilizing device (2) is communicated with the regulating and accumulating tank (1), the sewage treatment device (3) and the receiving water body (100) and is suitable for collecting sewage flowing in the regulating and accumulating tank (1) and/or the receiving water body (100) and continuously and stably conveying the collected sewage to the sewage treatment device (3) at a preset flow.

2. The multi-purpose rain water treatment system of claim 1, wherein,

the flow stabilizing device (2) comprises a water collecting tank and a hydraulic lifting mechanism (21);

the water collecting tank is communicated with the regulating and accumulating tank (1), the sewage treatment device and the receiving water body (100);

the hydraulic lifting mechanism (21) is communicated with the water collecting tank and is suitable for lifting and discharging sewage in the water collecting tank to the sewage treatment device (3).

3. The multi-functional rain water treatment system of claim 2, wherein,

the water collecting tank is connected with the regulating and accumulating tank (1) through a first connecting pipe (41);

the water collecting tank is connected with the receiving water body (100) through a second connecting pipe (42);

the water collecting tank is connected with the sewage treatment device (3) through a third connecting pipe (46);

wherein the interface position of the second connecting pipe (42) and the water collecting tank is higher than the interface arrangement of the first connecting pipe (41) and the water collecting tank.

4. The multifunctional rain water treatment system of claim 3, wherein,

the current stabilizer (2) further comprises:

a dividing wall (22) extending from the top wall of the water collecting tank to the bottom wall of the water collecting tank, and having a set distance from the bottom wall of the water collecting tank, wherein the bottom wall of the dividing wall (22) is lower than the interface between the first connecting pipe (41) and the water collecting tank;

the dividing wall (22) divides the water collecting tank into a first water collecting area (23) and a second water collecting area (24) with the bottoms mutually communicated, the first water collecting area (23) is communicated with the regulating reservoir (1), and the second water collecting area (24) is communicated with the receiving water body (100);

the hydraulic lifting mechanism (21) is communicated with the second water collecting area (24).

5. The multi-purpose rain water treatment system of claim 4, wherein,

the hydraulic lifting mechanism (21) comprises a lifting pump (211) and a lifting pipe (212);

the water inlet of the lifting pump (211) is connected with the lifting pipe (212), and the water outlet of the lifting pump is connected with the third connecting pipe (46);

one end of the lifting pipe (212) far away from the lifting pump (211) is inserted in the second water collecting area (24), and a water inlet of the lifting pipe (212) is lower than the bottom wall of the partition wall (22).

6. The multi-purpose rain water treatment system of claim 5, wherein,

the pipe diameter size of the lifting pipe (212) is smaller than that of the second connecting pipe (42).

7. The multifunctional rain water treatment system of any one of claims 3-6, wherein,

control valves are arranged on the first connecting pipe (41) and the second connecting pipe (42).

8. The multi-purpose rain water treatment system of claim 7, wherein,

the control valve arranged on the first connecting pipe (41) is an electric valve (43);

the control valve arranged on the second connecting pipe (42) is an electric control valve (44) which can adjust the flow of sewage in the second connecting pipe (42);

the second connecting pipe (42) is provided with a flowmeter (45).

9. The multi-purpose rain water treatment system of any one of claims 1-6, wherein,

the liquid level in the regulating and storing tank (1) is higher than the liquid level of the receiving water body.

10. The multi-purpose rain water treatment system of any one of claims 1-6, wherein,

a stirrer is arranged in the regulating and storing tank (1).

11. The multi-purpose rain water treatment system of any of claims 4-6, further comprising:

and the diversion well (11) is communicated with the regulating and accumulating tank (1) and the first water collecting area (23).

12. A multifunctional rain sewage treatment system according to any of claims 1-6, characterized in that the sewage treatment device (3) comprises:

and the sludge filtering and depositing device (31) is suitable for carrying out high-density sludge filtering and depositing on the sewage flowing through to treat COD, TP and SS in the sewage.

13. The multifunctional rain sewage treatment system according to claim 12, wherein the sewage treatment device (3) further comprises:

and the nitrification tank (32) is arranged at the downstream of the sludge filtering and settling device (31) and is suitable for performing nitrification reaction treatment on the water body discharged by the sludge filtering and settling device (31).

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