Integrated pipe network overflow and water pollution efficient reduction system

Abstract

The invention relates to the field of combined system network pipe overflow and water body pollution treatment, in particular to an integrated network pipe overflow and water body pollution efficient reduction system. According to the technical scheme, the integrated pipe network overflow and water body pollution efficient reduction system comprises a COS regulation and storage pond, a COS regulation and storage pond (efficient and rapid filtering facility), a sludge collection pond and a control unit; compared with a traditional efficient pollution reduction system, the system only restores a polluted water body and cannot control a source causing pollution, but a rainfall overflow event does not occur frequently, so that the problems that a suspended quick filter is idle in a sunny day, the utilization rate is low and the like exist; according to the high-efficiency pollution reduction system, two operation modes of rain period and non-rain period are adopted, so that the cooperative treatment of control of combined system overflow (CSO) pollution and reduction of black and odorous water pollution load is realized, the utilization rate of treatment facilities is improved, the operation space and occupied area are saved, and the cost is reduced. And the dual effects of the dynamic filler for biofilm formation as a rapid filter material and a biofilm carrier are fully exerted.

Description

Technical Field

[0001] The present invention relates to the field of combined sewer pipe overflow and water pollution treatment, and in particular to an integrated pipe network overflow and water pollution efficient reduction system. Background Art

[0002] With the rapid development of urbanization, urban water environment protection and waterlogging prevention are important tasks for cities. In recent years, the treatment of black and odorous water bodies has become an important starting point for the construction of national ecological civilization. Combined sewer overflow (CSO) pollution, as a key task, is a key bottleneck in the battle of water control. At present, the urban sewage treatment rate in my country has reached more than 98%. Under the premise that urban point source pollution has been effectively controlled, combined sewer overflow pollution, as the main source of urban non-point source pollution, contains a large amount of pipeline sediments, which is one of the important reasons for the black and odorous water bodies. Therefore, controlling the pollution load of combined sewer overflow into the river is the top priority of the treatment of black and odorous water bodies.

[0003] At present, two independent treatment systems are usually set up to control the pollution of combined sewer overflow (CSO) and reduce the pollution load of black and odorous water bodies, and they are treated separately; Patent document CN106587335 A discloses an aeration and oxygenation repair system for black and odorous water bodies, which can effectively improve the dissolved oxygen level of black and odorous water bodies, but the system only repairs the polluted water bodies and cannot control the source of pollution; Patent document CN105056591A discloses a suspended rapid filter tank for controlling combined sewer overflow pollution, which can effectively reduce the pollution load of combined sewer overflow, however, rainfall overflow events do not occur frequently, resulting in the suspension rapid filter tank being idle on sunny days and having low utilization rate; although some patent documents disclose an integrated treatment system for controlling CSO pollution and reducing the pollution load of black and odorous water bodies, such as patent document CN108408802 A announced an integrated treatment system for CSO pollution control and reduction of black and odorous water pollution load, but the system involves many structures, occupies a large area, is complex to build, has many pumps of various types, consumes a lot of energy, and the high efficiency and rapid filter of the main treatment unit has low treatment efficiency;

[0004] In view of the problems existing in the prior art, the present invention proposes an integrated pipe network overflow and water pollution efficient reduction system with small footprint, low energy consumption and high efficiency, which can coordinately treat combined sewer overflow sewage and black and odorous water in rivers, so as to achieve the purpose of rapidly reducing the pollution load of black and odorous water bodies. Summary of the invention

[0005] In order to overcome the problem that the existing technology only repairs the polluted water bodies but cannot control the source of pollution, however, rainfall overflow events do not occur frequently, resulting in the suspended rapid filter tank being idle on sunny days and low utilization rate, as well as the low processing efficiency of the high-efficiency rapid filter of the main treatment unit.

[0006] The technical solution of the present invention is: an integrated pipe network overflow and water pollution efficient reduction system, comprising:

[0007] COS storage tank: used to receive and store sewage from the overflow outlet of the combined sewer network and the river inlet;

[0008] High-efficiency rapid filter: used to quickly filter and adsorb sewage from the COS storage tank to remove suspended matter;

[0009] Mud collecting tank: used to store sludge and backwash mud-water mixture from COS storage tank and high-efficiency rapid filter;

[0010] Control unit: used to control the opening and closing of each valve, water pump and aeration device of the system.

[0011] Preferably, the COS storage tank is used to receive and store sewage from the overflow outlet of the combined sewer network and the river entrance. When the water level rises to above the first set height, the river water pump is closed and the sewage to be treated is discharged into the high-efficiency rapid filter by gravity flow. When the water level drops to below the second set height, the river sewage is pumped into the storage tank through the river water pump and then discharged into the high-efficiency rapid filter through the normally open valve for biochemical reaction.

[0012] As a preferred option, high-efficiency rapid filters are used to quickly filter and adsorb sewage from the COS storage tank to remove suspended solids. When overflowing on rainy days, they mainly play the role of physical rapid filtration to remove most of the water pollution and black and smelly sludge in the CSO. On sunny days, dissolved pollutants represented by COD and ammonia nitrogen in the black and smelly water of the river are removed through biochemical reactions.

[0013] Preferably, the sludge collection tank is used to store the sludge and backwash mud-water mixture from the COS storage tank and the high-efficiency rapid filter. After settling for a certain period of time, the upper clear liquid can be precipitated and returned to the COS storage tank through the clear liquid return pipeline. At the same time, a sludge transfer valve and an emptying pump are provided to discharge the sludge for collection and treatment by the relevant departments or discharge it into the downstream sewage pipe.

[0014] Preferably, the control unit is used to control the opening and closing of each valve, water pump and aeration device of the system, and controls the operating conditions of the system according to the water level data of the COS storage tank, including the combined sewer overflow treatment condition and the aeration biochemical treatment condition, while receiving the water quality monitoring data and head loss monitoring data of the high-efficiency rapid filter to determine whether it is necessary to start the backwash device or to overhaul the system.

[0015] Preferably, the COS storage tank has an overflow inlet and a river water inlet, the overflow inlet is connected to the overflow discharge port of the combined sewer network, and the river water inlet is for river sewage to enter.

[0016] Preferably, the high-efficiency rapid filter is provided with six functional areas, which are, from left to right, a large particle separation area, a rapid adsorption reaction area, an electrochemical reaction area, a multifunctional oxygen-enriched area, a deepening reaction area and a clean water area; the large particle separation area is provided with a particle filter screen, the rapid adsorption reaction area is provided with a porous zeolite and modified activated carbon mixed filler, the electrochemical reaction area is provided with a polycrystalline ore body filler, the multifunctional oxygen-enriched area is provided with a micro-vortex suspended ball filler made of ABS material and a high-energy oxygen-enriched integrated machine, and the deepening reaction area is provided with a polymer polyurethane porous filler; the control unit is used to control the opening and closing of each valve, each water pump and aeration device of the system; a normally open valve is connected between the COS storage tank and the high-efficiency rapid filter.

[0017] Preferably, the control unit is used to control the opening and closing of each valve, each water pump and aeration device of the system; a normally open valve is connected between the COS regulating reservoir and the high-efficiency rapid filter; when the water level of the COS regulating reservoir rises to higher than a first set height, the control unit controls the river water pump at the river water inlet to close.

[0018] Preferably, when treating the untreated sewage in the COS storage tank, the following steps are included:

[0019] S11: The sewage to be treated in the COS storage tank is discharged into the high-efficiency rapid filter by gravity flow, and the filler in the functional area is used for rapid filtration and adsorption to intercept suspended matter in the sewage;

[0020] S12: When the water level of the COS regulating tank drops below the second set height, the control unit controls the river water pump to allow the river sewage to enter the COS regulating tank, and discharges the untreated sewage in the COS regulating tank into the high-efficiency rapid filter through the normally open valve for biochemical reaction to remove dissolved pollutants.

[0021] Preferably, the biochemical reaction is carried out on the filler in the functional area and the biofilm attached thereto; and the first set height is greater than the second set height.

[0022] Preferably, by adopting both rainy season and non-rainy season operation modes, the coordinated treatment of combined sewer overflow (CSO) pollution control and the reduction of black and odorous water pollution load is achieved, the utilization rate of treatment facilities is improved, the operation space and floor space are saved, and while being easy to install, the sewage treatment efficiency of the facilities is maximized, and the dual role of biofilm dynamic filler as a rapid filter material and biofilm carrier is fully utilized.

[0023] Beneficial effects of the present invention:

[0024] 1. Compared with the traditional pollution efficient reduction system, this system only repairs the polluted water body and cannot control the source of pollution. However, rainfall overflow events do not occur frequently, resulting in the suspension rapid filter tank being idle on sunny days and low utilization rate. At the same time, the high-efficiency rapid filter of the main treatment unit has low treatment efficiency. The pollution efficient reduction system adopts two operation modes, rainy season and non-rainy season, to achieve the coordinated treatment of combined sewer overflow (CSO) pollution control and the reduction of black and odorous water pollution load, improve the utilization rate of treatment facilities, save operating space and floor space, and is easy to install. At the same time, it maximizes the sewage treatment efficiency of the facility and gives full play to the dual role of the biofilm dynamic filler as a rapid filter material and biofilm carrier;

[0025] 2. By adopting two operation modes, rainy season and non-rainy season, the coordinated treatment of combined sewer overflow (CSO) pollution control and reduction of black and odorous water pollution load is achieved, the utilization rate of treatment facilities is improved, the operation space and floor space are saved, and it is easy to install. At the same time, the sewage treatment efficiency of the facilities is improved to the greatest extent, and the dynamic filler of the biofilm is fully utilized as a rapid filter material and a biofilm carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 What is shown is the principle block diagram of the integrated pipe network overflow and water pollution efficient reduction system of the present invention;

[0027] Figure 2 What is shown is a schematic diagram of the working process of the integrated pipe network overflow and water pollution efficient reduction system of the present invention;

[0028] Figure 3 Shown is a structural diagram of a high-efficiency rapid filter of an integrated pipe network overflow and water pollution high-efficiency reduction system of the present invention;

[0029] Explanation of reference numerals: 100, COS storage tank; 101, liquid level monitoring device; 102, gate; 103, gate; 104, sludge pump; 105, gate; 106, river water pump; 200, high-efficiency fast filter; 201, sludge pump; 202, gate; 203, gate; 204, water inlet; 205, large particle separation zone; 206, rapid adsorption reaction zone; 207, electrochemical reaction zone; 208, multifunctional oxygen-enriched zone; 209, deepening reaction zone; 210, clean water zone; 211, modified activated carbon mixed filling material; 212, polycrystalline ore body filler; 213, micro-vortex suspended ball filler; 214, polymer polyurethane porous filler; 215, particle filter; 216, mud discharge device; 217, bottom support; 218, porous sedimentation support plate; 219, aeration device; 220, emptying port; 221, water outlet; 222, head loss monitoring device; 223, perforated partition; 224, water quality monitoring device; 225, backwashing device; 300, mud collecting tank; 301, emptying pump; 302, sludge transfer valve; 400, control unit. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] See also Figure 1-3 The present invention provides an embodiment: an integrated pipe network overflow and water pollution efficient reduction system, comprising:

[0032] COS storage tank: used to receive and store sewage from the overflow outlet of the combined sewer network and the river inlet;

[0033] High-efficiency rapid filter: used to quickly filter and adsorb sewage from the COS storage tank to remove suspended matter;

[0034] Mud collecting tank: used to store sludge and backwash mud-water mixture from COS storage tank and high-efficiency rapid filter;

[0035] Control unit: used to control the opening and closing of each valve, water pump and aeration device of the system.

[0036] Preferably, the COS storage tank is used to receive and store sewage from the overflow outlet of the combined sewer network and the river entrance. When the water level rises to above the first set height, the river water pump is closed and the sewage to be treated is discharged into the high-efficiency rapid filter by gravity flow. When the water level drops to below the second set height, the river sewage is pumped into the storage tank through the river water pump and then discharged into the high-efficiency rapid filter through the normally open valve for biochemical reaction.

[0037] As a preferred option, high-efficiency rapid filters are used to quickly filter and adsorb sewage from the COS storage tank to remove suspended solids. When overflowing on rainy days, they mainly play the role of physical rapid filtration to remove most of the water pollution and black and smelly sludge in the CSO. On sunny days, dissolved pollutants represented by COD and ammonia nitrogen in the black and smelly water of the river are removed through biochemical reactions.

[0038] Preferably, the sludge collection tank is used to store the sludge and backwash mud-water mixture from the COS storage tank and the high-efficiency rapid filter. After settling for a certain period of time, the upper clear liquid can be precipitated and returned to the COS storage tank through the clear liquid return pipeline. At the same time, a sludge transfer valve and an emptying pump are provided to discharge the sludge for collection and treatment by the relevant departments or discharge it into the downstream sewage pipe.

[0039] Preferably, the control unit is used to control the opening and closing of each valve, water pump and aeration device of the system, and controls the operating conditions of the system according to the water level data of the COS storage tank, including the combined sewer overflow treatment condition and the aeration biochemical treatment condition, while receiving the water quality monitoring data and head loss monitoring data of the high-efficiency rapid filter to determine whether it is necessary to start the backwash device or to overhaul the system.

[0040] Preferably, the COS storage tank has an overflow inlet and a river water inlet, the overflow inlet is connected to the overflow discharge port of the combined sewer network, and the river water inlet is for river sewage to enter.

[0041] Preferably, the high-efficiency rapid filter is provided with six functional areas, which are, from left to right, a large particle separation area, a rapid adsorption reaction area, an electrochemical reaction area, a multifunctional oxygen-enriched area, a deepening reaction area and a clean water area; the large particle separation area is provided with a particle filter screen, the rapid adsorption reaction area is provided with a porous zeolite and modified activated carbon mixed filler, the electrochemical reaction area is provided with a polycrystalline ore body filler, the multifunctional oxygen-enriched area is provided with a micro-vortex suspended ball filler made of ABS material and a high-energy oxygen-enriched integrated machine, and the deepening reaction area is provided with a polymer polyurethane porous filler; the control unit is used to control the opening and closing of each valve, each water pump and aeration device of the system; a normally open valve is connected between the COS storage tank and the high-efficiency rapid filter.

[0042] Preferably, the control unit is used to control the opening and closing of each valve, each water pump and aeration device of the system; a normally open valve is connected between the COS regulating reservoir and the high-efficiency rapid filter; when the water level of the COS regulating reservoir rises to higher than a first set height, the control unit controls the river water pump at the river water inlet to close.

[0043] Preferably, when treating the untreated sewage in the COS storage tank, the following steps are included:

[0044] S11: The sewage to be treated in the COS storage tank is discharged into the high-efficiency rapid filter by gravity flow, and the filler in the functional area is used for rapid filtration and adsorption to intercept suspended matter in the sewage;

[0045] S12: When the water level of the COS regulating tank drops below the second set height, the control unit controls the river water pump to allow the river sewage to enter the COS regulating tank, and discharges the untreated sewage in the COS regulating tank into the high-efficiency rapid filter through the normally open valve for biochemical reaction to remove dissolved pollutants.

[0046] Preferably, the biochemical reaction is carried out on the filler in the functional area and the biofilm attached thereto; and the first set height is greater than the second set height.

[0047] Integrated pipe network overflow and water pollution reduction system, such as Figure 1 , Figure 2 and Figure 3 As shown, the system includes a COS storage tank 100, a high-efficiency rapid filter 200, a sludge collection tank 300 and a control unit 400. The COS storage tank 100 has an overflow inlet and a river water inlet, the overflow inlet is connected to the overflow discharge port of the combined sewer network for the combined sewer overflow 1 to enter, and the river water inlet is for the river sewage 2 to enter. The high-efficiency rapid filter 200 is provided with a large particle separation zone 205, a rapid adsorption reaction zone 206, an electrochemical reaction zone 207, a multifunctional oxygen-enriched zone 208, a deepening reaction zone 209 and a clear water zone 210. The control unit 400 is used to control the opening and closing of each valve, each water pump and the aeration device 219 of the system. In addition, a normally open valve is connected between the COS storage tank 100 and the high-efficiency rapid filter 200.

[0048] When the water level h of the COS storage tank 100 rises to a level higher than the first set height h1, the control unit 400 controls the river water pump 106 of the river water inlet to be closed, and the untreated sewage 4 in the COS storage tank 100 is discharged into the high-efficiency rapid filter 200 by gravity flow. The untreated sewage 4 in the high-efficiency rapid filter 200 passes through the large particle separation zone 205, the rapid adsorption reaction zone 206, the electrochemical reaction zone 207, the multifunctional oxygen-enriched zone 208, the deepening reaction zone 209 and the clear water zone 210 from left to right in turn, so as to achieve the rapid removal of suspended solids SS in the water body and the degradation and removal of some organic matter such as COD, ammonia nitrogen, total nitrogen and total phosphorus. At this time, the system works in the combined system overflow treatment condition, and the high-efficiency rapid filter 200 mainly plays a role in rapid filtration of sewage.

[0049] When the water level h of the COS storage tank 100 drops to below the second set height h2 (h1>h2), the control unit controls the river water pump 106 to start, pumps the river sewage 2 into the COS storage tank 100, and then opens the gate 105 to discharge the untreated sewage 4 in the COS storage tank 100 into the high-efficiency rapid filter 200 by gravity flow for biochemical reaction, removing dissolved pollutants represented by COD and ammonia nitrogen in the sewage. The biochemical reaction is carried out on the filler in the functional area and the biofilm attached to it. At this time, the system works in the aeration biochemical treatment condition, and the high-efficiency rapid filter 200 plays the role of an aeration biochemical reaction tank.

[0050] A liquid level monitoring device 101 is provided in the COS storage tank 100 for monitoring the water level in the tank, and the monitored water level data are transmitted to the control unit 400, and the control unit 400 controls the working condition of the system according to the water level of the COS storage tank 100. In addition, the COS storage tank 100 and the high-efficiency rapid filter 200 are connected to the mud pumps 104 and 201 respectively, and the gates 103 and 203 are opened, and the gates 102 and 202 are closed, so that the sludge deposited at the bottom can be discharged into the mud collecting tank 300. More preferably, the COS storage tank 100 is provided with an overflow pipe 3, and the water in the tank can be discharged through the overflow pipe when it exceeds the tank volume. More preferably, the mud pumps 104 and 201 can be used as emptying pumps. When the equipment is overhauled, the control unit 400 closes the gates 103 and 203, opens the gates 102 and 202, and can empty the COS storage tank 100 and the high-efficiency rapid filter 200 respectively.

[0051] The high-efficiency rapid filter 200 includes: a water inlet 204, a water inlet pipe of the water inlet 204 is connected to the water outlet of the COS storage tank 100 and the water inlet 204 is lower than the water outlet of the COS storage tank 100; six functional areas, from left to right, are a large particle separation area 205, a rapid adsorption reaction area 206, an electrochemical reaction area 207, a multifunctional oxygen-enriched area 208, a deepening reaction area 209 and a clean water area 210, each partition is separated and connected in sequence by a perforated partition plate 223, and a mud discharge device 216 is provided at the bottom of each partition; a bottom support 217 and a porous sedimentation support plate 218 are used to support the fillers in the rapid adsorption reaction area 206, the electrochemical reaction area 207, the multifunctional oxygen-enriched area 208, and the deepening reaction area 209, and the excess sludge is sunk to the bottom of the high-efficiency rapid filter 200 through the openings of the porous sedimentation support plate 218. The sludge discharge device 216 discharges externally; the aeration device 219 is arranged on the porous support plate 218. Under the aeration and biochemical treatment conditions, the adsorption reaction zone 206, the electrochemical reaction zone 207, and the deepening reaction zone 209 independently carry out aeration and biochemical reactions; the drain port 220 is arranged at the bottom of the clean water zone 210, and is used to empty the water stored in the clean water zone 210; the water outlet 221, the drainage pipe of the water outlet 204 is connected to the river; the head loss monitoring device 222, each functional area is provided with a head loss monitoring device; the water quality monitoring device 224, is arranged at the water inlet 204 and the water outlet 221 of the high-efficiency rapid filter 200; the backwashing device 225, is arranged at the bottom of the rapid adsorption reaction zone 206, the electrochemical reaction zone 207, the multifunctional oxygen-enriched zone 208, and the deepening reaction zone 209, and is used to clean the blockage inside the high-efficiency rapid filter 200.

[0052] The large particle separation zone 205 is provided with a particle filter 215, the particle filter 215 has an aperture of 30 meshes and is made of stainless steel, and is used to filter floating objects and large particles in the sewage to be treated 4; the rapid adsorption reaction zone 206 is provided with a porous zeolite and modified activated carbon mixed filler 211, which is used to quickly adsorb suspended matter and colloidal substances in the sewage, and the porous zeolite and modified activated carbon mixed filler 211 has a particle size of 30mm-50mm, and the total volume accounts for 30% of the rapid adsorption reaction zone 206; the electrochemical reaction zone 207 is provided with a polycrystalline ore filler 212, which is used to react with ions and colloids in the sewage to promote the formation of flocculent precipitation of suspended matter in the sewage, and the polycrystalline ore filler 212 can also adsorb suspended matter in the sewage, and the biofilm loaded on the surface of the polycrystalline ore filler 212 can remove pollutants such as COD and nitrogen and phosphorus in the sewage, and the particle size is 50mm-80mm, and the total volume accounts for 30% of the electrochemical reaction zone 207; The oxygen-enriched zone 208 is provided with a micro-vortex suspended ball filler 213 and a high-energy oxygen-enriched integrated machine (not shown in the figure), which are used to disturb the water body to form a vortex, so that the biofilm loaded on the surface of the filler is in full contact with the pollutants, and at the same time, energy is given to the microorganisms to accelerate the biological removal of pollutants such as COD and nitrogen and phosphorus in the sewage. The micro-vortex suspended ball 213 is made of ABS material with a particle size of 30mm-50mm, and the total volume accounts for 35% of the multifunctional oxygen-enriched zone 208; the deepening reaction zone 209 is provided with a polymer polyurethane porous filler 214, the surface of the polymer polyurethane porous filler 214 is easy to form a biofilm, and the biofilm loaded on the surface can carry out simultaneous nitrification and denitrification, and deeply treat pollutants such as COD and nitrogen and phosphorus in the sewage. At the same time, the polymer polyurethane porous filler 214 has a large specific surface area and can effectively adsorb suspended matter in the sewage. The particle size of the polymer polyurethane porous filler 214 is 40mm-50mm, and the total volume accounts for 30% of the deepening reaction zone 209.

[0053] The high-efficiency rapid filter 200 is composed of a plurality of functional zones working in series. Under the overflow treatment condition, each functional zone progressively performs rapid and efficient filtration and adsorption; under the aeration biochemical treatment condition, each functional zone progressively performs aeration biochemical reaction. In this preferred solution, a head loss monitoring device 222 is also provided in the high-efficiency rapid filter 200, which is used to monitor the head loss of the high-efficiency rapid filter 200 and feed back to the control unit 400; when the head loss is large and exceeds the preset value, it can be considered that blockage occurs in the high-efficiency rapid filter 200, and the backwashing device 225 can be started to backwash the high-efficiency rapid filter 200. Furthermore, water quality monitoring devices 224 are provided at the water inlet 204 and the water outlet 221 of the high-efficiency rapid filter 200, and the output of the water quality monitoring device 224 is connected to the control unit 400; when the outlet water quality of the high-efficiency rapid filter is abnormal (for example, the organic matter content in the outlet water is higher than the organic matter content in the inlet water, and the outlet water quality is worse), the control unit issues a maintenance prompt to prompt the high-efficiency rapid filter 200 to be repaired.

[0054] While backwashing the high-efficiency rapid filter 200, the control unit 400 controls the sludge pump 201 and the gate 203 to open, and the gate 202 to close, so as to discharge the backwashed mud-water mixture into the mud collecting tank 300. The mud collecting tank 300 is mainly used to store the sludge and backwashed mud-water mixture from the COS storage tank 100 and the high-efficiency rapid filter 200. The sludge in the mud collecting tank is mainly divided into the following types: ① The underlying surface sediments and combined sewer pipe sediments washed out by rainfall in the COS storage tank; ② The deposition of suspended pollutants in the black and odorous water of the river in the CSO; ③ The underlying surface sediments, combined sewer pipe sediments and suspended pollutants in the black and odorous water intercepted in the high-efficiency rapid filter; ④ The shedding of the biofilm on the surface of the filler in the high-efficiency rapid filter; ⑤ The mud-water mixture backwashed by the high-efficiency rapid filter.

[0055] An overflow weir, a baffle and a mud suction pipe are arranged in the mud collecting tank 300. The mud discharge outlets of the mud discharge pumps of the COS regulating tank 100 and the high-efficiency rapid filter 200 are both located above the baffle, so that the muddy water at the mud discharge outlet impacts the baffle, which plays a buffering role and prevents excessive disturbance to the sludge at the bottom of the mud collecting tank 300. After settling in the mud collecting tank 300 for a certain period of time, the upper clear liquid can also be precipitated. When the clear liquid exceeds the overflow weir, it can be returned to the COS regulating tank through the clear liquid return pipeline 5. In addition, the mud collecting tank 300 is also provided with a sludge transfer valve 302. The mud suction pipe discharges the sludge in the mud collecting tank 300 through the sludge transfer valve 302 or the emptying pump 301, and is collected and processed by the relevant departments or discharged into the downstream sewage pipe. The discharge time interval can be determined according to the SS concentration in the combined overflow water and the black and smelly water in the river and the frequency of rainfall overflow events. The time for cleaning the silt at the bottom of the COS storage tank 100 is determined according to the SS concentration in the combined sewer overflow water and the black and smelly water in the river and the frequency of rainfall overflow events.

[0056] Example 1

[0057] When the combined sewer system overflow is treated, usually, when rainfall occurs, especially when it rains heavily, the urban combined sewer system overflows, and the overflow water of rainwater and sewage enters the COS storage tank 100 through the overflow discharge port, and the water level of the COS storage tank rises. When the water level rises to more than h1, the control unit 400 turns off the river water pump 106, and the untreated sewage 4 (i.e., the combined rainwater and sewage) in the COS storage tank 100 is discharged into the high-efficiency rapid filter 200 at a lower position by gravity flow, and the untreated sewage 4 is connected in series from left to right step by step through the six functional areas in the high-efficiency rapid filter 200, and the fillers in the functional areas quickly filter and adsorb the suspended matter in the sewage, so that the suspended matter in the sewage can be effectively intercepted, and the treated water is discharged into the river from the outlet 221. At this time, the high-efficiency rapid filter 200 mainly plays the role of physical adsorption and filtration.

[0058] Example 2

[0059] After the combined sewer overflow ends, the water level in the COS reservoir drops to h2. At this time, the control unit controls the start-up of the river water pump 106, the aeration device 219, the high-energy oxygen-enriched integrated machine and the water quality monitoring device. The river water pump 106 pumps the river sewage 2 (black and smelly water) into the COS reservoir. The untreated sewage 4 in the COS reservoir (river sewage that has been partially SS removed after preliminary sedimentation) is gravity-flow discharged into the high-efficiency rapid filter 200 at a lower position. The aeration device 219 at the bottom and the high-energy oxygen-enriched integrated machine in the multifunctional oxygen-enriched zone 208 provide the oxygen required for the biochemical reaction. At the same time, the filler and the biofilm loaded on the filler react with the sewage to remove dissolved pollutants represented by ammonia nitrogen and COD in the sewage. At this time, the high-efficiency rapid filter plays the role of biochemical reaction, and the effluent after aeration and biochemical treatment is discharged into the river through the outlet 221. During this process, the water quality detection device installed at the inlet and outlet of the high-efficiency and rapid filtration monitors the water quality of the inlet and outlet water in real time. Once the outlet water quality is abnormal, the abnormal signal will be transmitted to the maintenance personnel or regulatory authorities for timely maintenance.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. Integrated pipe network overflow and water pollution efficient reduction system; its characteristics are: Included are: COS storage tank: used to receive and store sewage from the overflow outlet of the combined sewer network and the river inlet; High-efficiency rapid filter: used to quickly filter and adsorb sewage from the COS storage tank to remove suspended matter; Mud collecting tank: used to store sludge and backwash mud-water mixture from COS storage tank and high-efficiency rapid filter; Control unit: used to control the opening and closing of each valve, water pump and aeration device of the system.

2. The integrated pipe network overflow and water pollution efficient reduction system according to claim 1 is characterized by: The COS storage tank is used to receive and store sewage from the overflow outlet of the combined sewer network and the river entrance. When the water level rises above the first set height, the river water pump is closed and the sewage to be treated is discharged into the high-efficiency rapid filter by gravity flow. When the water level drops below the second set height, the river sewage is pumped into the storage tank through the river water pump and then discharged into the high-efficiency rapid filter through the normally open valve for biochemical reaction.

3. The integrated pipe network overflow and water pollution efficient reduction system according to claim 2 is characterized by: The high-efficiency rapid filter is used to quickly filter and adsorb sewage from the COS storage tank to remove suspended solids. When overflowing on rainy days, it mainly plays the role of physical rapid filtration to remove most of the water pollution and black and smelly sludge in the CSO. On sunny days, it removes dissolved pollutants represented by COD and ammonia nitrogen in the black and smelly water of the river through biochemical reactions.

4. The integrated pipe network overflow and water pollution efficient reduction system according to claim 3 is characterized by: The sludge collection tank is used to store the sludge and backwash mud-water mixture from the COS storage tank and high-efficiency rapid filter. After settling for a certain period of time, the upper clear liquid can be precipitated and returned to the COS storage tank through the clear liquid return pipeline. At the same time, a sludge transfer valve and an emptying pump are provided to discharge the sludge for collection and treatment by relevant departments or discharge it into the downstream sewage pipe.

5. The integrated pipe network overflow and water pollution efficient reduction system according to claim 4 is characterized by: The control unit is used to control the opening and closing of the system's valves, water pumps and aeration devices. According to the water level data of the COS storage tank, it controls the system's operating conditions, including the combined sewer overflow treatment conditions and the aeration biochemical treatment conditions. At the same time, it receives the water quality monitoring data and head loss monitoring data of the high-efficiency rapid filter to determine whether it is necessary to start the backwash device or to overhaul the system.

6. The integrated pipe network overflow and water pollution efficient reduction system according to claim 5 is characterized by: The COS regulating reservoir has an overflow inlet and a river water inlet. The overflow inlet is connected to the overflow discharge port of the combined sewer network, and the river water inlet is for river sewage to enter.

7. The integrated pipe network overflow and water pollution efficient reduction system according to claim 6 is characterized by: The high-efficiency rapid filter is provided with six functional areas, which are, from left to right, a large particle separation area, a rapid adsorption reaction area, an electrochemical reaction area, a multifunctional oxygen-enriched area, a deepening reaction area and a clean water area; the large particle separation area is provided with a particle filter screen, the rapid adsorption reaction area is provided with a porous zeolite and modified activated carbon mixed filler, the electrochemical reaction area is provided with a polycrystalline ore body filler, the multifunctional oxygen-enriched area is provided with a micro-vortex suspended ball filler made of ABS material and a high-energy oxygen-enriched integrated machine, and the deepening reaction area is provided with a polymer polyurethane porous filler; the control unit is used to control the opening and closing of each valve, each water pump and aeration device of the system; a normally open valve is connected between the COS storage tank and the high-efficiency rapid filter.

8. The integrated pipe network overflow and water pollution efficient reduction system according to claim 7 is characterized by: The control unit is used to control the opening and closing of each valve, each water pump and aeration device of the system; a normally open valve is connected between the COS regulating reservoir and the high-efficiency rapid filter; when the water level of the COS regulating reservoir rises to a level higher than a first set height, the control unit controls the river water pump at the river water inlet to close.

9. The integrated pipe network overflow and water pollution efficient reduction system according to claim 8 is characterized by: When treating the untreated sewage in the COS storage tank, the following steps are included: S11: The sewage to be treated in the COS storage tank is discharged into the high-efficiency rapid filter by gravity flow, and the filler in the functional area is used for rapid filtration and adsorption to intercept suspended matter in the sewage; S12: When the water level of the COS regulating tank drops below the second set height, the control unit controls the river water pump to allow the river sewage to enter the COS regulating tank, and discharges the untreated sewage in the COS regulating tank into the high-efficiency rapid filter through the normally open valve for biochemical reaction to remove dissolved pollutants.

10. The integrated pipe network overflow and water pollution efficient reduction system according to claim 9, characterized in that: The biochemical reaction is carried out on the filler in the functional area and the biofilm attached thereto; the first set height is greater than the second set height.

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