CN117401842A - Deep rapid two-stage rainwater and sewage converging water separation treatment device and method - Google Patents
Deep rapid two-stage rainwater and sewage converging water separation treatment device and method Download PDFInfo
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- CN117401842A CN117401842A CN202311355960.5A CN202311355960A CN117401842A CN 117401842 A CN117401842 A CN 117401842A CN 202311355960 A CN202311355960 A CN 202311355960A CN 117401842 A CN117401842 A CN 117401842A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 216
- 239000010865 sewage Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000926 separation method Methods 0.000 title claims abstract description 20
- 230000001105 regulatory effect Effects 0.000 claims abstract description 78
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 230000033228 biological regulation Effects 0.000 claims description 30
- 238000004140 cleaning Methods 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 238000005273 aeration Methods 0.000 claims description 14
- 238000004062 sedimentation Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 11
- 238000005842 biochemical reaction Methods 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 6
- 208000034699 Vitreous floaters Diseases 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000004949 mass spectrometry Methods 0.000 claims 4
- 238000005194 fractionation Methods 0.000 claims 1
- 239000013589 supplement Substances 0.000 abstract description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
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- 238000004891 communication Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/08—Aerobic processes using moving contact bodies
- C02F3/082—Rotating biological contactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/109—Characterized by the shape
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Biological Wastes In General (AREA)
Abstract
The invention relates to the technical field of urban combined flow section sewage treatment, in particular to a deep rapid two-stage rainwater and sewage combined flow water separation treatment device and method. The invention divides the unstable water supply area of the confluence section into two working conditions of sunny days and rainy days, and respectively transfers the two working conditions to the advanced treatment unit and the rapid treatment unit for treatment through the hydraulic flow regulating device. The water quality concentration of the incoming water treated by the advanced treatment unit is higher, and the treated water quality standard is also higher, so that the incoming water can be used for ecological water supplement or other resource utilization; the water quality concentration of the incoming water treated by the rapid treatment unit is low, the water quality standard after treatment is also low, and the rapid treatment of a large amount of rainwater and sewage can be realized so as to reduce overflow pollution to enter a river channel. Therefore, the invention can solve the technical problems of sewage filtration and separation quality separation treatment.
Description
Technical Field
The invention relates to the technical field of urban combined flow section sewage treatment, in particular to a deep rapid two-stage rainwater and sewage combined flow water content treatment device and method.
Background
Urban drainage systems are generally divided into a confluence drainage system and a diversion system, and the confluence drainage systems are mostly adopted in the early stage of urban construction, but due to the fact that urban population is continuously increased in recent years, the surface impervious area is increased, the rainwater runoff is increased, the urban hydrologic cycle process is changed, the water quantity entering the confluence drainage system is increased, overflow pollution events occur frequently, the quality of urban water environment is continuously deteriorated, and problems such as black and odorous water become a chronic disease of urban treatment. Although rain and sewage diversion transformation work is carried out in all places, the transformation of the combined system involves a large number of urban updating construction, and the combined system has reasonability in some areas, so that the combined system drainage system still continuously exists in a large number of urban construction for a period of time in the future. Under such a background, how to select a reasonable sewage treatment technology effectively solves the negative problem of the sewage treatment system caused by the great change of the flow and the concentration of the combined system in rainy seasons, and becomes the focus of research work in the related field at present.
When in dry season, the sewage is mainly transferred to living sewage in the combined pipe network, the concentration of pollutants is higher, the water quantity is relatively stable, a large amount of rain sewage is brought into the combined pipe network in rainy season, the combined sewage also presents different scene characteristics due to different rainfall characteristics, the water quantity of the combined sewage is mainly unstable, the sewage concentration is obviously reduced compared with the sewage in dry season, on one hand, larger water quantity impact is brought to a sewage treatment plant, and on the other hand, the water quality change also has larger influence on the treatment effect of a sewage treatment unit, especially a biochemical section.
The rain and sewage converging water treatment device and method in the prior art generally adopts a intercepting well, an inspection well and a sewage treatment unit, sewage treatment is carried out according to different water qualities and water amounts, but the structure design of the intercepting well and the inspection well is simpler, in addition, the sewage treatment unit is in a serial mode, sewage can only be treated once, and the quality-separating treatment problem of sewage filtration and separation can not be effectively solved if the sewage amount is large.
Disclosure of Invention
The invention aims to provide a deep and rapid two-stage rainwater and sewage converging water treatment device and method, which can solve the technical problems of sewage filtration and separation of quality-separating treatment by arranging a hydraulic flow regulating device and separating sewage treatment into a sunny working condition and a rainy working condition for separate treatment.
In order to achieve the purpose, the invention designs a deep rapid two-stage rainwater and sewage converging water separation treatment device, which comprises a hydraulic flow regulating device and a sewage treatment unit which are sequentially arranged along the water flow direction, wherein the sewage treatment unit comprises a rapid treatment unit and a deep treatment unit which are arranged in parallel, and water inlets of the rapid treatment unit and the deep treatment unit are communicated with a water outlet of the hydraulic flow regulating device; the hydraulic flow regulating device is internally provided with a hydraulic flow regulating structure which is used for regulating the sewage quantity and the sewage concentration entering the rapid treatment unit.
As a preferable scheme, a water inlet tank, a water inlet gate well and a water inlet channel are further arranged in the hydraulic flow regulating device in sequence along the water flow direction, a cavity structure is arranged in the water inlet gate well, and the hydraulic flow regulating structure is arranged in the cavity of the water inlet gate well; one side of the water inlet tank is communicated with the deep processing unit; the tail end of the water inlet channel is communicated with the rapid processing unit.
As an optimal scheme, the hydraulic flow regulating structure comprises a self-cleaning grille, a hydraulic flow regulating gate and a hydraulic quick-opening gate, wherein the self-cleaning grille is arranged on one side close to the water inlet tank, the hydraulic flow regulating gate is arranged on the side face of the self-cleaning grille, and the hydraulic quick-opening gate is arranged on one side close to the water inlet channel.
Preferably, the top of the water inlet gate well is connected with a cleaning pipe for injecting water into the water inlet channel so as to flush the sludge in the water inlet channel.
As a preferable scheme, an overflow weir is arranged in the middle of the water inlet tank to divide the water inlet tank into a water inlet chamber and a diversion chamber, one side of the water inlet chamber is communicated with a water inlet converging box culvert, and the other side of the water inlet chamber is communicated with a receiving water body; one side of the diversion chamber is communicated with the water inlet gate well, and the other side of the diversion chamber is communicated with the advanced treatment unit.
As the preferred scheme, quick processing unit includes confluence regulation pond, sedimentation system, the carousel filtering pond that sets gradually along the rivers direction, the water inlet and the water inlet canal end intercommunication of confluence regulation pond are equipped with the reposition of redundant personnel well that is used for the sewage reposition of redundant personnel in the confluence regulation pond, sedimentation system is used for the sediment from the sewage that the confluence regulation pond flowed in, the carousel filtering pond is used for filtering the sewage that flows in from the sedimentation system.
As a preferred scheme, the advanced treatment unit comprises an aeration grit chamber, a biochemical reaction tank and a biological film reaction tank, wherein a water inlet of the aeration grit chamber is communicated with the tail end of a water inlet channel, a coarse grid and a fine grid for intercepting floaters in sewage are arranged in the aeration grit chamber, a film grid is arranged in the biochemical reaction tank, and the biological film reaction tank utilizes a film system to filter and separate mud-containing sewage in the reaction tank.
The invention also designs a deep and rapid two-stage rain sewage flow water separation treatment method, wherein the two stages respectively refer to a sunny working condition and a rainy working condition, and concretely comprises the following steps,
under the working condition of sunny days, the hydraulic flow regulating structure is closed, sewage directly enters the advanced treatment unit from the water inlet tank, and the sewage is filtered and separated through aeration, biochemistry and membrane system reaction of the advanced treatment unit;
under the working condition of rainy days, the hydraulic flow regulating structure is opened, and a part of sewage enters the advanced treatment unit from the water inlet tank for filtration and separation; the other part of sewage is filtered and regulated by the hydraulic flow regulating structure and then enters the rapid treatment unit, and the rapid treatment unit continues to precipitate and filter, so that the double filtration, separation and purification of the sewage are realized.
As a preferable scheme, the method specifically comprises the following steps under the rainy day working condition:
at the early stage of rainfall, when the water quantity exceeds the designed flow, the self-cleaning grille, the hydraulic flow regulating gate and the hydraulic quick-opening gate are opened, sewage firstly intercepts large-scale floaters in water through the self-cleaning grille, and then flows into a water inlet channel from the hydraulic flow regulating gate and the hydraulic quick-opening gate to avoid blocking subsequent facilities; then sewage flows into the confluence regulation pool from the water inlet channel, the water level of the confluence regulation pool gradually rises along with the rainfall, when the water level in the confluence regulation pool reaches the designed water level, the self-cleaning grid and the hydraulic flow regulating gate are closed, and the sewage is continuously deposited and filtered in the rapid treatment unit;
at the later period of rainfall, when the water storage level of the confluence regulation pool exceeds the regulation capacity of the confluence regulation pool, part of sewage is directly discharged into a receiving water body from a water inlet tank;
after rain stop, according to the siltation condition of the water inlet channel, the hydraulic flow regulating gate and the hydraulic quick-opening gate are closed, water is injected into the water inlet channel through the cleaning pipe, and when the liquid level in the water inlet gate well reaches the designed liquid level, the hydraulic quick-opening gate is quickly opened to flush the mud in the water inlet channel.
The invention has the beneficial effects that:
the invention divides the unstable water supply area of the confluence section into two working conditions of sunny days and rainy days, and respectively transfers the two working conditions to the advanced treatment unit and the rapid treatment unit for treatment through the hydraulic flow regulating device. The water quality concentration of the incoming water treated by the advanced treatment unit is higher, and the treated water quality standard is also higher, so that the incoming water can be used for ecological water supplement or other resource utilization; the water quality concentration of the incoming water treated by the rapid treatment unit is low, the water quality standard after treatment is also low, and the rapid treatment of a large amount of rainwater and sewage can be realized so as to reduce overflow pollution to enter a river channel. The method provided by the invention can effectively solve the problems that the water inflow and water quality of the sewage in the urban combined flow production area are unstable, and then the municipal sewage treatment system is impacted. Therefore, the invention can effectively solve the negative problems of the sewage treatment system caused by the great change of the flow and the concentration of the combined system in the rainy season and solve the technical problems of sewage filtration and separation and quality separation treatment.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a schematic plan view of the hydraulic flow regulating device of the present invention.
Fig. 3 is a cross-sectional view of fig. 2 at A-A.
Fig. 4 is a schematic plan view of the fast processing unit of the present invention.
Fig. 5 is a schematic plan view of a depth processing unit according to the present invention.
Reference numerals illustrate:
1-water inflow confluence box culvert; 15-an ultraviolet disinfection tank; 16-metering channel; 101-a hydraulic flow regulating device; 102-a fast processing unit; 103-a depth processing unit; 104-receiving a body of water;
101-hydraulic flow regulating device: 17-quick-closing gate; 18-self-cleaning grille; 19-a hydraulic flow regulating gate; 20-hydraulic quick-opening gate; 21-an ultrasonic level gauge; 22-a water inlet tank; 23-overflow weir; 24-a sluice gate well; 25-water inlet channel; 26-cleaning the tube; 27-overflow aperture; 28-a protective cage cat ladder; 111-a hydraulic flow regulating structure; 221-a water inlet chamber; 222-a split-flow chamber;
102-fast processing unit: 3-a confluence regulation pool; a 4-precipitation system; 5-a rotary disc filter tank;
103-depth processing unit: 6-coarse grille; 7-fine gratings; 8-an aeration grit chamber; 15-a biochemical reaction tank (9-a membrane grid; 10-a selection tank; 11-an anaerobic tank; 12-an anoxic tank; 13-an aerobic tank); 14-a biological film reaction tank.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.
In the description of the present invention, 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 invention 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 invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, 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 fixed or removable, 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 invention will be understood in specific cases by those of ordinary skill in the art.
Aiming at the problems of large water volume amplitude, low concentration in rainy season and the like commonly existing in the current urban confluence section sewage treatment, the invention provides a device and a method for treating the quality of rainwater and sewage in two stages, which are used for dealing with the depth of the urban confluence section. The invention can cope with the characteristics of unstable water coming from urban combined flow producing areas, low sewage concentration in rainy seasons and the like, effectively resist the impact load of storm and reduce the combined flow overflow pollution, has the characteristics of reliability, environmental protection and high efficiency, and is suitable for being applied to urban combined flow sewage treatment projects.
The invention constructs a quality-dividing treatment system consisting of a deep treatment unit and a rapid treatment unit, and adopts a two-stage quality-dividing treatment process. The advanced treatment unit is formed by sequentially connecting a grid pool, a sand setting pool, a membrane grid, an anoxic pool, an anaerobic pool, an aerobic pool and a biological reaction membrane pool through pipelines, the rapid treatment unit is formed by sequentially connecting a confluence regulating pool, a magnetic coagulation sedimentation tank and a fiber rotary disc filter through pipelines, the advanced treatment unit and the rapid treatment unit are connected through a hydraulic flow regulating device at the tail end of a water inlet confluence box culvert, and according to the change process of the water inlet water level, the advanced treatment unit and the rapid treatment unit are respectively selected to treat incoming water, and tail water after treatment is discharged after being disinfected up to standard.
As shown in fig. 1, the invention provides a deep rapid two-stage rainwater and sewage combined flow water treatment device, which comprises a hydraulic flow regulating device 101 and a sewage treatment unit which are sequentially arranged along the water flow direction, wherein the sewage treatment unit comprises a rapid treatment unit 102 and a deep treatment unit 103 which are arranged in parallel, and water inlets of the rapid treatment unit 102 and the deep treatment unit 103 are communicated with a water outlet of the hydraulic flow regulating device 101; a hydraulic flow regulating structure 111 is arranged in the hydraulic flow regulating device 101, and the hydraulic flow regulating structure 111 is used for regulating the sewage quantity and sewage concentration entering the rapid processing unit 102.
As shown in fig. 2 and 3, a hydraulic flow regulating device 101 is arranged in an opening at the inner side of a water inlet converging box culvert 1, the hydraulic flow regulating device 101 is co-built at the tail end of the water inlet converging box culvert, a water inlet tank 22, a water inlet gate well 24, a hydraulic flow regulating structure 111 and a water inlet canal 25 are sequentially arranged in the hydraulic flow regulating device 101 along the water flow direction, a cavity structure is arranged in the water inlet gate well 24, and the hydraulic flow regulating structure 111 is arranged in the cavity of the water inlet gate well 24; one side of the water inlet tank 22 is communicated with the depth processing unit 103; the end of the water inlet channel 25 is in communication with a rapid processing unit 102. The direction of the water flow is shown by the arrow direction in the figure.
The hydraulic flow regulating structure 111 comprises a self-cleaning grille 18, a hydraulic flow regulating gate 19 and a hydraulic quick-opening gate 20, wherein the self-cleaning grille 18 is arranged on one side close to the water inlet tank 22, the hydraulic flow regulating gate 19 is arranged on the side surface of the self-cleaning grille 18, and the hydraulic quick-opening gate 20 is arranged on one side close to the water inlet channel 25. An overflow aperture 27 is provided in the side wall of the water inlet box 22 connected to the sluice well 24 to facilitate the flow of water from the diversion chamber 222 into the sluice well 24. The hydraulic flow regulating structure 111 regulates the sewage amount and sewage concentration entering the confluence regulation tank 3 by regulating the opening and closing of the self-cleaning grille 18, the hydraulic flow regulating gate 19 and the hydraulic quick-opening gate 20. The top of the water inlet gate well 24 is connected with a cleaning pipe 26 for injecting water into the water inlet channel 25 so as to wash the sludge in the water inlet channel 25. The bottom of the water inlet gate well 24 is provided with a protective cage cat ladder 28 for overhauling the hydraulic flow regulating structure 111.
The middle part of the water inlet tank 22 is provided with an overflow weir, and the overflow weir 23 is used for enabling water flowing out of the water inlet confluence box culvert 1 to be discharged from one port in a concentrated manner, so that a large amount of boiled water is prevented from directly flushing the self-cleaning grid 18 and the hydraulic flow regulating gate 19. The overflow weir 23 divides the water inlet tank 22 into a water inlet chamber 221 and a diversion chamber 222, one side of the water inlet chamber 221 is communicated with a water inlet converging box culvert, and the other side of the water inlet chamber 221 is communicated with the receiving water body 104; one side of the diversion chamber 222 is communicated with the water inlet gate well 24, and the other side of the diversion chamber 222 is communicated with the advanced treatment unit 103. The bottom of the diversion chamber 222 and the bottom of the water inlet gate well 24 are respectively provided with an ultrasonic liquid level meter 21 for monitoring the liquid level.
As shown in fig. 4, the rapid processing unit 102 includes a confluence regulation tank 3, a sedimentation system 4, and a rotary disc filter 5 sequentially arranged along the water flow direction, wherein each reaction tank is formed by connecting pipes, a water inlet of the confluence regulation tank 3 is communicated with the tail end of the water inlet channel 25, a diversion well for diverting sewage is arranged in the confluence regulation tank 3, the sedimentation system 4 sediments the sewage flowing in from the confluence regulation tank 3 through magnetic force, and the rotary disc filter 5 is made of fibers and is used for filtering the sewage flowing in from the sedimentation system 4.
As shown in fig. 5, the advanced treatment unit 103 includes an aeration grit chamber 8, a biochemical reaction chamber 15, and a biological film reaction chamber 14, where each reaction chamber is formed by connecting pipes, a water inlet of the aeration grit chamber 8 is communicated with the end of the water inlet channel 25, a coarse grid and a fine grid for intercepting floating objects in sewage are arranged in the aeration grit chamber 8, a membrane grid is arranged in the biochemical reaction chamber 15, and the biological film reaction chamber 14 filters and separates mud sewage in the reaction chamber by using a membrane system.
The two water streams treated by the advanced treatment unit and the rapid treatment unit are mixed and then enter a disinfection tank for disinfection, and enter a receiving water body through a discharge port after disinfection, wherein the disinfection process is ultraviolet disinfection. The effluent treated by the biological film reaction tank 14 of the advanced treatment unit and the fiber turntable filter tank 5 of the rapid treatment unit enters the ultraviolet disinfection tank 15, and is discharged after being metered by the metering channel 16 after harmful substances such as bacteria, pathogenic bacteria and the like in the sewage are removed in the ultraviolet disinfection system.
The invention also provides a deep rapid two-stage rain sewage flow water quality-classifying treatment method, wherein the two stages respectively refer to a sunny working condition and a rainy working condition,
under the working condition of sunny days, the hydraulic flow regulating structure 111 is closed, sewage directly enters the advanced treatment unit 103 from the water inlet tank 22, and the sewage is filtered and separated through aeration, biochemistry and membrane system reaction of the advanced treatment unit 103;
under the working condition of sunny days, when the incoming water flow is lower than the designed flow, the hydraulic flow regulating gate 19, the self-cleaning grille 18, the quick-closing gate 17 and the hydraulic quick-opening gate 20 are arranged to be normally open, and sewage directly enters the advanced treatment unit 103 from the quick-closing gate 17. At this time, the standard of the water quality of the inlet water is as follows: COD is less than or equal to 330 and BOD 5 Less than or equal to 160 percent, ammonia nitrogen less than or equal to 35 percent, total nitrogen less than or equal to 45 percent, total phosphorus less than or equal to 6 percent, suspended matters less than or equal to 200 percent and PH range of 6 to 9. The sewage is intercepted by the water inflow converging box culvert 1 and enters the coarse grating 6, massive garbage and scum are removed, then the sewage enters the fine grating 7, fine suspended matters in the sewage are further removed, then the sewage automatically flows into the aeration grit chamber 8, after solid particles in the sewage are removed, the sewage sequentially enters the biochemical reaction tank for treatment which consists of the membrane grating 9, the selection tank 10, the anaerobic tank 11, the anoxic tank 12 and the aerobic tank 13, wherein the retention time of the anaerobic tank 11 is 1.89h, the retention time of the anoxic tank 12 is 5.40h, the retention time of the aerobic tank 13 is 8.76h, the sewage enters the biological membrane reaction tank 14 after passing through a biochemical reaction section, the sewage in the reaction tank is filtered by a membrane system, so that the mud-water separation is realized, and meanwhile, the biochemical functions of the system are enhanced, and the clear and transparent effluent is ensured.
Under the rainy day working condition, the hydraulic flow regulating structure 111 is opened, and a part of sewage enters the advanced treatment unit 103 from the water inlet tank 22 for filtration and separation; the other part of sewage is filtered and regulated by the hydraulic flow regulating structure 111 and then enters the rapid processing unit 102, and the rapid processing unit 102 continues to precipitate and filter, so that double filtration, separation and purification of the sewage are realized.
The working condition of the rainy day specifically comprises the following steps:
at the early stage of rainfall, when the water inflow exceeds the designed flow, namely when the source sewage is 1-3 times of the designed flow, the self-cleaning grille 18, the hydraulic flow regulating gate 19 and the hydraulic quick-opening gate 20 are opened, sewage firstly intercepts large floats in water through the self-cleaning grille 18, and then flows into a water inlet channel from the hydraulic flow regulating gate 19 and the hydraulic quick-opening gate 20 to avoid blocking subsequent facilities; then the sewage flows into the confluence regulating and accumulating tank 3 from the water inlet channel, the water level of the confluence regulating and accumulating tank 3 gradually rises along with the rainfall, and when the rainfall is convergedWhen the ultrasonic liquid level meter 21 in the regulating and accumulating tank 3 detects that the water level reaches the designed water level, the self-cleaning grille 18 and the hydraulic flow regulating gate 19 are closed, sewage enters the magnetic coagulation sedimentation system from the combined regulating and accumulating tank and starts to run, the sewage continues to be sedimented and filtered in the rapid processing unit, and meanwhile, the magnetic sedimentation system 4 and the fiber rotary disc filter 5 processing system start to enter water and run. At this time, the standard of the water quality of the inlet water is as follows: COD is less than or equal to 65 and BOD 5 Less than or equal to 30 percent, less than or equal to 3 percent of total phosphorus, less than or equal to 200 percent of suspended matters and the PH range is 6 to 9.
In the later period of rainfall, when the ultrasonic liquid level meter 21 in the diversion well of the confluence regulation pool monitors that the liquid level exceeds the water storage level of the confluence regulation pool 3, namely when the source sewage exceeds 3 times of the design flow, the hydraulic flow regulating gate 19 is closed through water level control, the sewage exceeding the energy regulating capacity of the confluence regulation pool 3 overflows into the receiving water body 104 at the front end of the confluence regulation pool, and the receiving water body 104 is water exceeding the treatment capacity and directly overflows into the natural water body.
After rain stop, according to the siltation condition of the water inlet channel 25, the hydraulic flow regulating gate 19 and the hydraulic quick-opening gate 20 are closed, water is injected into the water inlet channel 25 through the cleaning pipe 26, and when the liquid level in the water inlet gate well 24 reaches the designed liquid level, the hydraulic quick-opening gate 20 is quickly opened to flush the sludge in the water inlet channel 25.
In this embodiment, the design process scale is 20000m 3 And/d, the advanced treatment unit operates according to the design scale, and the rapid treatment unit can treat 4 ten thousand m at maximum 3 And/d, converging the rain and the sewage. The method provided by the invention can lead the effluent of the advanced treatment unit to reach COD less than or equal to 30 and BOD 5 6 or less, ammonia nitrogen or less than 1.5, total nitrogen or less than 15, total phosphorus or less than 0.3, suspended matters or less than 10, and PH in the range of 6-9; the effluent of the rapid treatment unit can reach suspended matters less than or equal to 10, total phosphorus less than or equal to 1.0 and fecal coliform less than or equal to 10 4 And each. The magnetic precipitation system increases the sedimentation rate of the floccules by adding high-efficiency recoverable magnetic powder in the coagulation stage, and increases the coagulation reaction effect by assisting a sludge reflux device, and the suspended matters in the sewage are further removed by the filter cloth filter. Because the rapid treatment system does not need to adopt a biochemical treatment process, the sewage treatment time is far less than the hydraulic retention time of the conventional domestic sewage treatment process.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. The utility model provides a degree of depth is quick two-stage rain sewage confluence water separation processing apparatus which characterized in that: the sewage treatment unit comprises a rapid treatment unit (102) and a deep treatment unit (103) which are arranged in parallel, wherein water inlets of the rapid treatment unit (102) and the deep treatment unit (103) are communicated with a water outlet of the hydraulic flow regulating device (101); the hydraulic flow regulating device (101) is internally provided with a hydraulic flow regulating structure (111), and the hydraulic flow regulating structure (111) is used for regulating the sewage quantity and the sewage concentration entering the rapid treatment unit (102).
2. The deep rapid two-stage rainwater and sewage mass spectrometry device according to claim 1, wherein: a water inlet tank (22), a water inlet gate well (24) and a water inlet channel (25) are sequentially arranged in the hydraulic flow regulating device (101) along the water flow direction, a cavity structure is arranged in the water inlet gate well (24), and the hydraulic flow regulating structure (111) is arranged in the cavity of the water inlet gate well (24); one side of the water inlet tank (22) is communicated with the advanced treatment unit (103); the tail end of the water inlet channel (25) is communicated with the rapid processing unit (102).
3. The deep rapid two-stage rainwater and sewage mass spectrometry device according to claim 2, wherein: the hydraulic flow regulating structure (111) comprises a self-cleaning grid (18), a hydraulic flow regulating gate (19) and a hydraulic quick-opening gate (20), wherein the self-cleaning grid (18) is arranged on one side close to the water inlet tank (22), the hydraulic flow regulating gate (19) is arranged on the side face of the self-cleaning grid (18), and the hydraulic quick-opening gate (20) is arranged on one side close to the water inlet channel (25).
4. A deep rapid two-stage rainwater and sewage splitting device according to claim 3, wherein: the top of the water inlet gate well (24) is connected with a cleaning pipe (26) for injecting water into the water inlet channel (25) so as to flush the sludge in the water inlet channel (25).
5. A deep rapid two-stage rainwater and sewage combined flow water separation treatment device according to any one of claims 2 to 4, characterized in that: an overflow weir is arranged in the middle of the water inlet tank (22) to divide the water inlet tank (22) into a water inlet chamber (221) and a diversion chamber (222), one side of the water inlet chamber (221) is communicated with a water inlet confluence box culvert, and the other side of the water inlet chamber (221) is communicated with the receiving water body (104); one side of the diversion chamber (222) is communicated with the water inlet gate well (24), and the other side of the diversion chamber (222) is communicated with the advanced treatment unit (103).
6. The deep rapid two-stage rainwater and sewage mass spectrometry device according to claim 5, wherein: the rapid treatment unit (102) comprises a confluence regulation tank (3), a sedimentation system (4) and a rotary disc filter tank (5) which are sequentially arranged along the water flow direction, a water inlet of the confluence regulation tank (3) is communicated with the tail end of a water inlet channel (25), a diversion well for diverting sewage is arranged in the confluence regulation tank (3), the sedimentation system (4) is used for settling sewage flowing in from the confluence regulation tank (3), and the rotary disc filter tank (5) is used for filtering sewage flowing in from the sedimentation system (4).
7. The deep rapid two-stage rainwater and sewage mass spectrometry device according to claim 6, wherein: the advanced treatment unit (103) comprises an aeration grit chamber (8), a biochemical reaction tank (15) and a biological film reaction tank (14), wherein a water inlet of the aeration grit chamber (8) is communicated with the tail end of a water inlet channel (25), a coarse grid and a fine grid for intercepting floaters in sewage are arranged in the aeration grit chamber (8), a film grid is arranged in the biochemical reaction tank (15), and the biological film reaction tank (14) filters and separates mud-containing sewage in the reaction tank by utilizing a film system.
8. A deep rapid two-stage rainwater and sewage converging water quality-classifying treatment method is characterized by comprising the following steps of: the two stages respectively refer to a sunny working condition and a rainy working condition, and specifically comprise the following steps,
under the working condition of sunny days, the hydraulic flow regulating structure (111) is closed, sewage directly enters the advanced treatment unit (103) from the water inlet tank (22), and the sewage is filtered and separated through aeration, biochemistry and membrane system reaction of the advanced treatment unit (103);
under the working condition of rainy days, a hydraulic flow regulating structure (111) is opened, and a part of sewage enters a deep treatment unit (103) from a water inlet tank (22) for filtration and separation; the other part of sewage is filtered and regulated by a hydraulic flow regulating structure (111) and then enters a rapid processing unit (102), and precipitation and filtration are continued in the rapid processing unit (102), so that double filtration, separation and purification of the sewage are realized.
9. The deep rapid two-stage rain sewage flow water fractionation method according to claim 8, wherein: the working condition of the rainy day specifically comprises the following steps:
at the early stage of rainfall, when the water inflow exceeds the designed flow, a self-cleaning grid (18), a hydraulic flow-regulating gate (19) and a hydraulic quick-opening gate (20) are opened, sewage firstly intercepts large-scale floaters in water through the self-cleaning grid (18), and then flows into a water inlet channel (25) from the hydraulic flow-regulating gate (19) and the hydraulic quick-opening gate (20) to avoid blocking subsequent facilities; then sewage flows into the confluence regulation pool (3) from the water inlet channel (25), the water level of the confluence regulation pool (3) gradually rises along with the rainfall, when the water level in the confluence regulation pool (3) reaches the designed water level, the self-cleaning grid (18) and the hydraulic flow regulating gate (19) are closed, and the sewage is continuously deposited and filtered in the rapid treatment unit (102);
at the later period of rainfall, when the water storage level of the confluence regulation pool (3) exceeds the regulation capacity of the confluence regulation pool, part of sewage is directly discharged into the receiving water body (104) from the water inlet tank (22);
after rain stop, according to the siltation condition of the water inlet channel (25), the hydraulic flow regulating gate (19) and the hydraulic quick-opening gate (20) are closed, water is injected into the water inlet channel (25) through the cleaning pipe (26), and when the liquid level in the water inlet gate well (24) reaches the designed liquid level, the hydraulic quick-opening gate (20) is quickly opened to flush the sludge in the water inlet channel (25).
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| CN202311355960.5A CN117401842A (en) | 2023-10-18 | 2023-10-18 | Deep rapid two-stage rainwater and sewage converging water separation treatment device and method |
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