CN114988575A

CN114988575A - Treatment system with functions of on-site ecological treatment and recycling of rain sewage and use method thereof

Info

Publication number: CN114988575A
Application number: CN202210664782.3A
Authority: CN
Inventors: 郑向勇; 王芝权; 辛锡光; 赵敏; 吴苏清; 范春贞; 江顺风; 贝克; 金展; 戴传军; 孔海南; 刁目贺
Original assignee: Sanshui Ecological Technology Jiangsu Co ltd; Wenzhou University
Current assignee: Sanshui Ecological Technology Jiangsu Co ltd; Wenzhou University
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-09-02

Abstract

The invention relates to a treatment system with the functions of on-site ecological treatment and recycling of rain sewage and a use method thereof, wherein the treatment system comprises: the inspection well is provided with a well shaft and a well cover, the bottom of the well shaft is also provided with a water tank, and the water tank is provided with a liquid level detector and a water outlet valve; the rainwater and sewage internal circulation module is used for carrying out ecological treatment on rainwater and sewage, is positioned in an inspection well and comprises an aerobic packing layer I, an anaerobic packing layer and an aerobic packing layer II which are sequentially arranged from top to bottom, the wall of a shaft of the inspection well is hollow, a lifting pipe is arranged, the lifting pipe is used for communicating a water tank with the rainwater and sewage internal circulation module, a lifting pump I is arranged on the lifting pipe, and when the water level in the water tank is at a high level, a water outlet valve is opened to discharge rainwater and sewage in the water tank; when the water level in the water tank is at a low level, the rain sewage in the tank enters the rain sewage internal circulation module for treatment through the lifting pipe; the water drain pipe assembly, the central control module and the power supply module. The on-site treatment and recycling of the rain and sewage mixed water are realized, and the non-point source pollution is reduced.

Description

Treatment system with functions of on-site ecological treatment and recycling of rain sewage and use method thereof

Technical Field

The invention relates to the field of environmental engineering and the field of municipal garden greening, in particular to a treatment system with the functions of on-site ecological treatment and recycling of rain sewage and a use method thereof.

Background

Urban rainwater and sewage mixed overflow is one of the main sources of water pollution in China. The sewage is untreated domestic sewage, industrial wastewater and the like, and after the rain sewage enters a receiving water body, the sewage not only causes black and odorous water body and eutrophication, but also seriously threatens the safety of drinking water.

As the urban sewage pipe network in China is complex in condition and various pipe network construction modes coexist, along with the continuous expansion of urban scale and excessive concentration of population density, a centralized urban drainage system has the characteristics of large collection, large transportation, quick transfer and the like for flow in rainy seasons, and downstream sewage plants do not always have excess mixed sewage treatment capacity, so that the pollution problem of on-way overflow can occur, impact pollution is caused to urban water systems and received water bodies, and the urban sewage pipe network is a direct cause of black and odorous urban water bodies in China. The rainwater and sewage treatment mode and the drainage pipe network in the existing city are insufficient, and the treatment effect on the water pollution problem caused by the mixed overflow of rainwater and sewage is poor. Is a systematic problem which needs to be urgently solved when sponge city construction and drainage basin treatment are carried out in China at present.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides a treatment system with the functions of on-site ecological treatment and recycling of the rain sewage, which has the function of ecological internal circulation treatment of the rain sewage and can realize on-site circular treatment and recycling of the rain sewage, thereby effectively reducing the problem of water pollution caused by rain sewage overflow.

The technical scheme of the invention is as follows: a treatment system with the functions of on-site ecological treatment and reuse of rain sewage comprises:

the inspection well is used for collecting rain sewage and is provided with a shaft and a well cover, the bottom of the shaft is also provided with a water tank, and the water tank is provided with a liquid level detector and a water outlet valve;

the rainwater and sewage internal circulation module is used for ecologically treating rainwater and sewage, is positioned in an inspection well, and further comprises a first aerobic packing layer, a second anaerobic packing layer and a second aerobic packing layer which are sequentially arranged from top to bottom, wherein the wall of a well shaft of the inspection well is hollow, a lifting pipe is arranged, the lifting pipe is used for communicating a water tank with the rainwater and sewage internal circulation module, a first lifting pump is arranged on the lifting pipe, and when the water level in the water tank is at a high level, a water outlet valve is opened to discharge rainwater and sewage in the water tank; when the water level in the water tank is at a low level, the rain sewage in the tank enters the rain sewage internal circulation module for treatment through the lifting pipe;

the drainage pipe assembly comprises a first drainage pipe and a second drainage pipe which are used for discharging rain sewage in the inspection well, the two drainage pipes are controlled by the drainage valve, a second lifting pump is arranged on the second drainage pipe, the first drainage pipe is used for discharging water in the inspection well into the next inspection well or an external water body, the second lifting pump can be used for lifting the water in the inspection well, and the water discharged by the second drainage pipe can be reused as required;

the central control module comprises a power equipment control circuit module, a water quality online monitoring system and a PLC remote monitoring system, wherein the PLC remote monitoring system can monitor the running state of equipment in real time and give an alarm when the equipment fails; the online water quality monitoring system can be used for monitoring the change of water quality in an inspection well in real time, when the water quality is monitored to be not up to standard, the first lifting pump is started, rain sewage in the box enters the rain sewage internal circulation module through the lifting pipe to carry out ecological treatment on the rain sewage, and when the water quality is monitored to be up to standard, treated water in the box can be discharged through the first drainage pipe or the second drainage pipe;

and the power supply module is used for supplying power to each lift pump and the control valve.

By adopting the technical scheme, aiming at the defects of the existing urban rainwater and sewage treatment mode and the existing drainage pipe network, the treatment system and the use method thereof provided by the patent can realize on-site circulation treatment and recycling of rainwater and sewage mixed water, thereby effectively reducing the problem of water pollution caused by rainwater and sewage mixed sewage overflow.

Rainwater and sewage are collected and discharged into an inspection well, precipitation is carried out in a water accumulation area at the bottom of a water tank, the rainwater and sewage subjected to precipitation treatment can be lifted by a first lifting pump and then flows through a rainwater and sewage internal circulation module, so that periodic cyclic treatment of the rainwater and sewage is realized, finally, the rainwater and sewage subjected to cyclic treatment for multiple times are discharged after reaching the standard through online monitoring, the water in the inspection well is discharged into a next inspection well or an external water body through a first drainage pipe, the water in the inspection well can be lifted by a second lifting pump, and the water discharged by a second drainage pipe can be reused for greening, toilet flushing, landscapes and the like as required;

a liquid level detector is also arranged on the inner side of the water tank, so that the water level change of the inspection well can be monitored in real time, when the water level is too high, the water level can be adjusted through a water outlet valve, the drainage function of the inspection well is mainly performed, and the internal circulation processing function is assisted; when the water level was crossed lowly, can start the inner loop processing function, the processing function of inspection shaft was main this moment, and the drainage function is for assisting to realize the ecological treatment mode of intelligent inspection shaft rain sewage.

Preferably, the aerobic packing layer I is a magnesium-rich micro-electrolysis biological packing, the anaerobic packing layer is a zeolite packing, and the aerobic packing layer II is a gravel packing, wherein the grain diameter ratio of the packing of each layer is as follows: the aerobic packing layer I is less than or equal to the anaerobic packing layer and less than the aerobic packing layer II. The particle diameter ratio of each layer of the filler is gradually increased from top to bottom, so that the problem of filler blockage caused by accumulation of solid particles in sewage can be effectively avoided. The magnesium-rich micro-electrolysis biological filler can improve the film forming and stripping efficiency, and has the advantages of erosion resistance, scouring resistance, large porosity, large specific surface area, enhanced phosphorus removal and the like; the zeolite filler is used as a single-matrix filler, has stronger selective adsorption capacity and can be used for strengthening the denitrification effect; the gravel packing has larger grain diameter, can effectively avoid blockage and improve the operation period of the artificial wetland system.

Preferably, the grain size of the filler of the aerobic filler layer I is 0.15-0.3 cm, the grain size of the filler of the anaerobic filler layer is 0.3-0.5 cm, the grain size of the filler of the aerobic filler layer II is 1-2 cm, and the thickness of each filler layer is 2-4 cm.

Preferably, the aerobic filler layers are aerated and oxygenated, the air-water ratio of each aerobic filler layer is controlled to be 3-10: 1, and the filling rate of the filler in each aerobic filler layer is 20-60%. The appropriate filling rate can ensure the fluidization degree of the filler in water, ensure the transfer and utilization of oxygen and further improve the treatment effect.

Preferably, the rainwater and sewage internal circulation module adopts a horizontal flow and vertical flow mixed mode, water flows along an S shape between the filling layers of the layers, and siphon or drip irrigation water distribution is also adopted between the filling layers of the upper and lower layers; and a partition plate is arranged between every two adjacent packing layers, and holes with the aperture of 10-20 mm are formed in the partition plate at intervals of 50 mm. Ensure the filtering effect of the filling materials at all levels on water quality.

Preferably, the rainwater and sewage ecological treatment module is hung on the well cover.

Preferably, the bottom of the inspection well is inclined at an angle of 30-40 degrees. Facilitating the subsequent sludge discharge.

Preferably, the outer diameter of a drain pipe of the inspection well (1) is not more than 800mm, the embedding depth of the well is not more than 6m, and the inner wall of a shaft (11) of the inspection well (1) is 10-20 mm wider than the outer wall of the water tank (2); the well bore (11) of the inspection well (1) can be made of concrete. The relative size and the installation position of the inspection well are reasonable, so that the inspection well can be prevented from being attached to the water tank too tightly, and is convenient to take out for maintenance in the subsequent process.

Preferably, the processing system further comprises a mud discharging well, the mud discharging well is connected with a mud discharging pipe and a bottom mud extracting pipe which is also connected with the water tank, a spiral lifting pump is arranged in the mud discharging well, and the spiral lifting pump is used for extracting the sludge precipitated in the water tank into the mud discharging well and discharging the sludge in the well through the mud discharging pipe.

Another object of the invention is: the application method of the treatment system with the functions of on-site ecological treatment and recycling of rain sewage is provided, and the inspection well can be insulated by a heat-insulating cover body made of glass or nylon material in winter. The normal operation of the rain sewage ecological treatment module is ensured.

Drawings

FIG. 1 is a schematic diagram of the internal structure of an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of an inspection well according to an embodiment of the present invention;

FIG. 3 is a schematic view of a siphon-type water distribution of the internal rain sewage circulation module according to an embodiment of the present invention;

fig. 4 is a schematic view of drip irrigation type water distribution of the rain sewage internal circulation module according to the embodiment of the invention.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the treatment system of the present invention with on-site ecological treatment and recycling functions of rain sewage comprises:

a rainwater and sewage collecting pipe network and an inspection well 1, wherein rainwater and sewage are collected by the collecting pipe network and then enter the inspection well 1,

the inspection well 1 is used for collecting rain sewage, the inspection well 1 is provided with a shaft 11 and a well cover 12, the bottom of the inspection well 1 is inclined at an inclination angle of 30-40 degrees, the bottom of the shaft 11 is also provided with a water tank 2, and the water tank 2 is provided with a liquid level detector 3 and a water outlet valve; the outer diameter of a drain pipe of the inspection well 1 is not more than 800mm, the embedding depth of the well is not more than 6m, the inner wall of a shaft 11 of the inspection well 1 is 10-20 mm wider than the outer wall of the water tank 2, and the shaft 11 of the inspection well 1 is made of concrete;

the rainwater and sewage internal circulation module 4 is used for performing ecological treatment on rainwater and sewage, is positioned in the inspection well 1, and further comprises an aerobic packing layer I41, an anaerobic packing layer 42 and an aerobic packing layer II 43 which are sequentially arranged from top to bottom, wherein the aerobic packing layer I41 is a magnesium-rich micro-electrolysis biological packing, and the magnesium-rich micro-electrolysis biological packing is described in detail in patent documents previously filed by the applicant, so that the detailed description is omitted, the anaerobic packing layer 42 is zeolite, and the aerobic packing layer II 43 is gravel, wherein the grain diameter ratio of the packing of each layer is: the aerobic packing layer I41 is not less than the anaerobic packing layer 42 is not less than the aerobic packing layer II 43; the grain size of the filler of the aerobic filler layer I41 is 0.15-0.3 cm, the grain size of the filler of the anaerobic filler layer 42 is 0.3-0.5 cm, the grain size of the filler of the aerobic filler layer II 43 is 1-2 cm, and the thickness of each filler layer is 2-4 cm; the aerobic filler layer I41 is oxygenated by natural drop water oxygenation, the aerobic filler layer II 43 is oxygenated by aeration, the air-water ratio of each aerobic filler layer is controlled to be 3-10: 1, and the filling rate of the filler in each aerobic filler layer is 20-60%; the rainwater and sewage internal circulation module 4 adopts a mixed mode of horizontal flow and vertical flow, water flows along an S shape between the filling layers of the layers, and siphon or drip irrigation water distribution is also adopted between the filling layers of the upper and lower layers; a partition board is arranged between every two adjacent packing layers, holes with the aperture of 10-20 mm are formed in the partition board at intervals of 50mm, and the partition board is made of glass fiber reinforced plastic; the rainwater and sewage ecological treatment module 4 is suspended on the well cover 12;

the wall of a shaft 11 of the inspection well 1 is hollow, a lifting pipe 5 is arranged, the lifting pipe 5 is used for communicating the water tank 2 with the rainwater and sewage internal circulation module 4, a lifting pump I6 is arranged on the lifting pipe 5, and when the water level in the water tank 2 is at a high level, a water outlet valve is opened to discharge rainwater and sewage in the water tank 2; when the water level in the water tank 2 is at a low level, rain sewage in the tank enters the rain sewage internal circulation module 4 for treatment through the lifting pipe 5;

the drainage pipe assembly 7 comprises a first drainage pipe 71 and a second drainage pipe 72 which are used for discharging rain sewage in the inspection well 1, the two drainage pipes are controlled through a drainage valve 73, a second lifting pump 74 is arranged on the second drainage pipe 73, the first drainage pipe 71 is used for discharging the water in the inspection well 1 into the next inspection well or an external water body, the second lifting pump 74 can be used for lifting the water in the inspection well 1, and the water discharged by the second drainage pipe 72 can be reused as required;

the central control module 8 comprises a power equipment control circuit module, a water quality online monitoring system and a PLC remote monitoring system, wherein the power equipment control circuit module comprises a water outlet valve switch, a water pump starting switch and an aeration switch; the PLC remote monitoring system can monitor the running state of equipment in real time, give an alarm when the equipment fails, prompt timely fault maintenance, can be connected in a communication mode of 5G, Ethernet, Wifi or 4G and the like, adopts a VPN over P2P technology and combines an RSA encryption algorithm to ensure communication safety; the water quality on-line monitoring system can be used for monitoring the water quality change in an inspection well in real time, the main indexes comprise dissolved oxygen, COD (chemical oxygen demand), turbidity, ammonia nitrogen and the like, when the water quality is monitored to be not up to the standard, the first lifting pump 6 is started, rain sewage in the box enters the rain sewage internal circulation module 4 through the lifting pipe 5 to perform ecological treatment on the rain sewage, and when the water quality is monitored to be up to the standard, the treated water in the box can be discharged through the first drainage pipe 71 or the second drainage pipe 72;

the power supply module 9 is used for supplying power to each lifting pump and the control valve, supplies power to the solar photovoltaic, ensures the intermittent operation of the whole inspection well, does not need an external power supply, and is low-carbon and environment-friendly;

the sludge discharge well 10, the sludge discharge well 10 has connect sludge discharge pipe 101 and still has the bed mud extraction pipe 102 of being connected with water tank 2, be equipped with spiral elevator pump 103 in the sludge discharge well 10, spiral elevator pump 103 is arranged in being used for extracting the mud that deposits in the water tank 2 to the sludge discharge well 10 to mud in with the well is by discharging through sludge discharge pipe 102.

The application method of the treatment system with the functions of on-site ecological treatment and recycling of the rain sewage is characterized in that the inspection well can be insulated by a heat-insulating cover body made of glass or nylon materials in winter.

When the rainwater and sewage collecting device is used, rainwater and sewage are collected by the rainwater and sewage collecting pipe network and then discharged into the inspection well 1, sedimentation is carried out in a water accumulation area at the bottom of the water tank 2, sludge precipitated in the water tank 2 is pumped into the sludge discharge well 10 by the spiral lifting pump 103, and the sludge can be further lifted by the spiral lifting pump 103 and discharged out of the well through the sludge discharge pipe 101;

the rainwater and sewage in the water tank 2 after precipitation treatment can be lifted by the first lifting pump 6 and then flows through the rainwater and sewage internal circulation module 4, so that the periodical circulation treatment of the rainwater and sewage is realized, finally, the rainwater and sewage subjected to the repeated circulation treatment are discharged after reaching the standard through online monitoring, the water in the inspection well 1 is discharged into the next inspection well or an external water body through the first drainage pipe 71, the water in the inspection well 1 can be lifted by the second lifting pump 74, and the water discharged by the second drainage pipe 72 can be reused for greening, toilet flushing, landscapes and the like according to requirements;

a liquid level detector 3 is also arranged on the inner side of the water tank 2, so that the water level change of the inspection well 1 can be monitored in real time, when the water level is too high, the water level can be adjusted through a water outlet valve, the drainage function of the inspection well is mainly performed at the moment, and the internal circulation processing function is assisted; when the water level was crossed lowly, can start the inner loop processing function, the processing function of inspection shaft 1 was main this moment, and the drainage function is for assisting to realize the ecological treatment mode of intelligent inspection shaft rain sewage.

After the rain sewage is treated by the treatment facility, the effluent is measured according to the specified value in the urban miscellaneous water quality Standard (GB/T18920-.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A treatment system with functions of on-site ecological treatment and recycling of rain sewage is characterized by comprising:

the inspection well (1) is used for collecting rain sewage, the inspection well (1) is provided with a shaft (11) and a well cover (12), the bottom of the shaft (11) is also provided with a water tank (2), and the water tank (2) is provided with a liquid level detector (3) and a water outlet valve;

the rainwater and sewage internal circulation module (4) is used for carrying out ecological treatment on rainwater and sewage, is positioned in the inspection well (1), and further comprises a first aerobic packing layer (41), a second anaerobic packing layer (42) and a second aerobic packing layer (43) which are sequentially arranged from top to bottom, wherein the wall of a shaft (11) of the inspection well (1) is hollow, a lifting pipe (5) is arranged, the lifting pipe (5) is used for communicating the water tank (2) with the rainwater and sewage internal circulation module (4), a lifting pump I (6) is arranged on the lifting pipe (5), and when the water level in the water tank (2) is at a high level, a water outlet valve is opened to discharge the rainwater and sewage in the water tank (2); when the water level in the water tank (2) is at a low level, rain sewage in the tank enters the rain sewage internal circulation module (4) for treatment through the lifting pipe (5);

the drainage pipe assembly (7) comprises a first drainage pipe (71) and a second drainage pipe (72) which are used for discharging rain sewage in the inspection well (1), the two drainage pipes are controlled through a drainage valve (73), a second lifting pump (74) is arranged on the second drainage pipe (73), the first drainage pipe (71) is used for discharging water in the inspection well (1) into the next inspection well or an external water body, the second lifting pump (74) can be used for lifting the water in the inspection well (1), and the water discharged by the second drainage pipe (72) can be reused as required;

the central control module (8) comprises a power equipment control circuit module and a water quality online monitoring system; the online water quality monitoring system can be used for monitoring the change of water quality in an inspection well in real time, when the water quality is monitored to be not up to standard, a first lifting pump (6) is started, rainwater and sewage in the box enters a rainwater and sewage internal circulation module (4) through a lifting pipe (5) to carry out ecological treatment on the rainwater and sewage, and when the water quality is monitored to be up to standard, treated water in the box can be discharged through a first drain pipe (71) or a second drain pipe (72);

and a power supply module (9) for supplying power to each lift pump and the control valve.

2. The system of claim 1, wherein the aerobic packing layer I (41) is magnesium-rich microelectrolytic biological packing, the anaerobic packing layer (42) is zeolite packing, and the aerobic packing layer II (43) is gravel packing, wherein the packing particle diameter ratio of each layer is as follows: the aerobic filler layer I (41) is less than or equal to the anaerobic filler layer (42) and less than the aerobic filler layer II (43).

3. The system of claim 2, wherein the aerobic packing layer (41) has a packing diameter of 0.15-0.3 cm, the anaerobic packing layer (42) has a packing diameter of 0.3-0.5 cm, the aerobic packing layer (43) has a packing diameter of 1-2 cm, and each packing layer has a thickness of 2-4 cm.

4. The system according to claim 1, 2 or 3, wherein the aerobic filler layer I (41) is oxygenated by natural drop water oxygenation, the aerobic filler layer II (43) is oxygenated by aeration, the air-water ratio of the aerobic filler layers is controlled to be 3-10: 1, and the filling rate of the filler in the aerobic filler layers is controlled to be 20-60%.

5. The system for on-site ecological treatment and recycling of rain sewage according to claim 1, 2 or 3, wherein the internal circulation module (4) of rain sewage adopts a horizontal flow and vertical flow mixed mode, the water flows along an S-shaped flow between the filling layers of the levels, and siphoning or drip irrigation water distribution is adopted between the filling layers of the upper and lower levels; all be equipped with the baffle between each adjacent packing layer, open according to the interval 50mm on the baffle has the hole of 10~20mm aperture.

6. The system for on-site ecological treatment and recycling of rainwater and sewage according to claim 1, 2 or 3, wherein the module for ecological treatment of rainwater and sewage (4) is suspended on the well lid (12).

7. The system for on-site ecological treatment and reuse of storm sewage according to claim 1, 2 or 3, wherein the bottom of said inspection shaft (1) is inclined at an angle of 30-40 °.

8. The system for on-site ecological treatment and recycling of rainwater and sewage according to claim 1, 2 or 3, wherein the outer diameter of the drainage pipe of the inspection well (1) is not more than 800mm, the burying depth of the well is not more than 6m, and the inner wall of the shaft (11) of the inspection well (1) is 10-20 mm wider than the outer wall of the water tank (2); the well bore (11) of the inspection well (1) can be made of concrete.

9. The system for on-site ecological treatment and recycling of rain sewage according to claim 1, 2 or 3, further comprising a sludge discharge well (10), wherein the sludge discharge well (10) is connected with a sludge discharge pipe (101) and a bottom sludge extraction pipe (102) further connected with the water tank (2), the sludge discharge well (10) is internally provided with a spiral lift pump (103), and the spiral lift pump (103) is used for extracting sludge precipitated in the water tank (2) into the sludge discharge well (10) and discharging sludge in the well through the sludge discharge pipe (102).

10. The application method of the treatment system with the functions of on-site ecological treatment and recycling of the rain sewage is characterized in that: in winter, the inspection well (1) can be insulated by a heat-insulating cover body made of glass or nylon materials.