WO2022062367A1 - Qualitative and partitioned cso regulation, storage and purification system and purification method - Google Patents

Abstract

Provided are a qualitative and partitioned CSO regulation, storage and purification system and a purification method. The system is divided into an upper layer and a lower layer; a lower layer region comprises an overflow area, an energy dissipation water distribution area and a sewage purification area that are sequentially connected; an upper layer region comprises the overflow area, the energy dissipation water distribution area and a water storage area; and the upper layer region and the lower layer region share the overflow area and the energy dissipation water distribution area. The water storage area is respectively connected to the overflow area and the energy dissipation water distribution area, used to store sewage in the overflow area, and may enter the energy dissipation water distribution area for purification. The water storage area comprises several water storage chambers for storing sewage having different concentration levels, and the sewage purification area correspondingly comprises several levels of purification areas for grading the sewage having different concentration levels. In the present invention, sewage purification in a regulation and storage tank may be achieved, and subsequent newly-built enhanced treatment facilities are not needed; meanwhile, sewage may be further stored according to different qualities and areas, grading of sewage having different pollutant concentrations is achieved, and improvement in quality and efficiency of a CSO regulation and storage tank is achieved.

Description

CSO regulation and storage purification system and purification method by quality and partition technical field

The invention belongs to the technical field of environmental treatment, and relates to a CSO regulation, storage and purification system and a purification method by quality and partition.

Background technique

Most cities and towns in my country adopt a combined drainage system. The combined drainage system will carry a large amount of surface pollutants and urban sewage overflow to rivers, lakes and other water bodies during rain, causing the combined drainage system overflow (CSO) pollution problem. The overflow regulation and storage tank of the combined drainage system is a combined sewage collection facility. It covers a large area and can generally be built below the public area of the city. The rainwater is slowly drained from the storage tank. It can not only avoid rainwater peaks, prevent urban waterlogging, and realize rainwater recycling, but also avoid initial rainwater pollution to bear water bodies, and also play a positive role in drainage scheduling between drainage areas.

Due to the bad atmospheric environment and serious surface runoff pollution, the initial rainwater collected by the rainwater storage tank must be treated and then discharged to prevent pollution of the storage water body. Therefore, when building a CSO storage tank, it is often necessary to build related water treatment facilities, which increases the engineering cost. On the other hand, there is a lot of space inside the CSO storage tank, which is only used to store rainwater and cannot be used effectively. As a result, the function of the CSO storage tank is single, and the economic benefit is not high.

In view of this, it is necessary to design an improved CSO regulation and storage purification system and purification method by quality separation and partition.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a CSO regulation and storage purification system and a purification method by quality and partition.

In order to achieve the above purpose, the CSO regulation, storage and purification system of the present invention includes an upper layer area and a lower layer area, and the lower layer area includes an overflow area, an energy dissipation and water distribution area, and a sewage purification area that are connected in sequence, and the upper layer area includes. The overflow area, the energy dissipation water distribution area and the water storage area, the upper area and the lower area share the overflow area and the energy dissipation water distribution area; the water storage area is respectively connected with the overflow area and the water storage area. The energy-dissipating water distribution areas are connected to each other for storing sewage in the overflow area, and can enter the energy-dissipating water distribution area for purification.

As a further improvement of the present invention, the water storage area includes several water storage chambers, which are respectively used to store sewage of different concentration levels, and the sewage purification area correspondingly includes several levels of purification areas for the different concentration levels. The sewage is graded.

As a further improvement of the present invention, the sewage purification zone includes a reinforced sedimentation zone, a fiber packing high-efficiency filtration zone and a baffle purification zone that are connected in sequence, and the fiber-packed high-efficiency filtration zone is a tower type comprising several stages of fiber packing filter layers Filtration structure, the filtration fineness of each layer of the fiber filler filter layer increases sequentially from top to bottom, and the baffle purification area correspondingly includes several levels of baffle purification areas, which are used for the sewage of different concentration levels. graded processing.

As a further improvement of the present invention, the concentration levels of several of the water storage chambers gradually decrease from the direction close to the energy dissipation water distribution and the overflow area to the direction away from the energy dissipation water distribution and the overflow area and connected to the energy dissipation and water distribution area through drainage ditch; the slope of each area of the water storage chamber is 0.8-1.0%, and the drainage ditch is arranged on the lower side of the slope toe of the storage chamber, and the slope is 0.8-1.0%.

As a further improvement of the present invention, the energy dissipation and water distribution area includes a grille fore-pool, a coarse grille area and an energy-dissipation sill; the grille fore-pool has a preset gradient in the longitudinal direction, the plane layout is trapezoid, and the slope is 0.6% ～1.0%; the grid gap of the coarse grid is set to 20mm～30mm; the energy dissipation sill adopts steps for energy dissipation, the slope is 30°～35°, and the step width/step height is ≥1.5; the energy dissipation water distribution area At the water outlet, a uniform water diversion wall is arranged, and the uniform water diversion wall is composed of two elliptical holes with a water wall.

As a further improvement of the present invention, the enhanced sedimentation tank adopts advection flow, and is equipped with a single bucket to discharge mud, the length-width ratio is not less than 4, and the water depth is not less than 4m; The terminal adopts a door-type flushing device, and the door-type flushing device adopts a hydraulic downward-opening weir gate.

As a further improvement of the present invention, the fiber filler high-efficiency filter area adopts fiber filler as the filter material, the fiber filler is made of fiber material into bundles, and the porosity is more than 93%, and the fiber material is nylon, vinylon, acrylic, At least one of polyester.

As a further improvement of the present invention, the reinforced sedimentation zone, the fiber filler high-efficiency filtration zone and the baffle purification zone are all two, and are symmetrically arranged on the energy dissipation water distribution zone and the overflow zone. On both sides; the water storage chambers for each concentration level are 4, which are symmetrically arranged on both sides of the energy dissipation water distribution area and the overflow area.

The present invention also provides a method for purifying and purifying CSO by grading and zoning, using the above-mentioned CSO regulating and accumulating and purifying system by grading and zoning to purify sewage, including the following steps:

S01. When the start-up water level h of the CSO regulation-storage purification system _starts < the energy-dissipating pool sewage water level h ≤ the top elevation h ₀ of the overflow wall, and no overflow occurs, the sewage is purified in the lower area of the regulation-storage and purification system;

S02. When h=h ₀ , and the water depth of the overflow area H _{overflow area} > 0, if the external sewage volume Q < the system discharge flow Q1, start the submersible sewage pump between the energy dissipation water distribution area and the overflow area , the water in the overflow area is introduced into the energy dissipation water distribution area and then purified; if the external sewage volume Q > the system discharge flow Q1, the submersible sewage pump between the energy dissipation water distribution area and the overflow area will not be started. The water in the overflow area is introduced into the water storage area for water storage, and the sewage in the energy dissipation and water distribution area is purified according to the steps in S01;

S03. When h=h ₀ , H _{overflow area} =0, and the water depth h of _{the high} -concentration water storage chamber is greater than 0, and the water depth of the medium-concentration water storage chamber h _is greater than or equal to 0, open the outlet gate of the high-concentration water storage chamber, Sewage flows into the energy dissipation and water distribution area through the drainage ditch for purification treatment at the corresponding level, and when Q<Q1, the flow rate is _high = Q1-Q, and when Q>Q1, the flow rate is _high = 0;

S04. When h = h ₀ , H _{overflow area} = 0, h _{high storage} = 0, h _{medium storage} > 0, and the water depth of the low concentration water storage chamber h _{low storage} ≥ 0, open the outlet gate of the medium concentration storage chamber, and the sewage It flows into the energy dissipation and water distribution area through the drainage ditch to carry out the corresponding level of purification treatment, and when Q<Q1, the flow rate _in q=Q1-Q, and when Q>Q1, the flow rate _in q=0

S05. When h = h ₀ , H _{overflow area} = 0, h _{high storage} = 0, h _{medium storage} = 0, h _{low storage} ≥ 0, open the outlet gate of the low concentration water storage chamber, and the sewage flows into the energy dissipation cloth through the drainage ditch The water area is purified at the corresponding level and when Q<Q1, and the flow rate q _{is low} =Q1-Q, when Q>Q1, the flow rate q _{is low} =0;

S06. When h=h ₀ , when the H _{overflow area} , h _{high storage} , h _{medium storage} , and h _{low storage} all reach the maximum value, the water storage capacity of the system reaches the maximum, and the sewage inlet of the energy dissipation water distribution area is closed.

As a further improvement of the present invention, in step S01, the purification of the sewage in the lower area of the regulation and storage system includes: the sewage flows from the energy dissipation and water distribution area into the enhanced sedimentation tank for sludge sedimentation; From the reinforced sedimentation zone, it flows into the first layer of fiber filler filter layer water distributor connected with it through the overflow pipe, and enters the first layer of fiber filler filter layer through the water distributor. The water collecting tank at the bottom of the filtering area; open the high-concentration sewage valve at the entrance of the high-concentration sewage purification area, and the sewage is pumped from the collecting tank at the bottom of the fiber packing high-efficiency filtering area through the high-concentration sewage pump to the high-concentration deflecting purification area, and then passes through the medium-concentration sewage in turn. And low concentration baffle purification area, after high, medium and low concentration baffle purification area purification treatment, flow to stable outflow area outflow.

In step S04, sewage flows from the energy dissipation and water distribution area into the enhanced sedimentation tank for sludge sedimentation, the sewage valve of the second filter layer is opened, and the sewage flows from the enhanced sedimentation area through the overflow pipe into the second layer of fiber packing filter layer that communicates with it. The water distributor enters the second layer of fiber packing filter layer through the water distributor and enters the water collecting tank at the bottom of the high-efficiency filtration zone of the fiber packing after two layers of filtration from top to bottom; open the medium-concentration sewage at the entrance of the medium-concentration sewage purification zone Valve, sewage is pumped from the sump at the bottom of the fiber packing high-efficiency filtration area to the medium-concentration baffle purification area through the medium-concentration sewage pump. At the same time, when the medium-concentration sewage pump is turned on, the medium-concentration anti-backflow gate located in front of the outlet of the medium-concentration sewage pump It is closed to prevent the sewage from flowing back to the previous area, and then passes through the low-concentration baffle purification area, and after the purification treatment in the medium and low concentration baffle purification area, it flows to the stable outflow area.

In step S05, the sewage flows from the energy dissipation and water distribution area into the enhanced sedimentation tank for sludge sedimentation, the valve of the third layer of fiber packing filter layer water distributor is opened, and the sewage flows from the enhanced sedimentation area through the overflow pipe into the third layer connected with it. layer of fiber filler filter layer water distributor, enter the third layer of fiber filler filter layer through the water distributor, and enter the sump at the bottom of the fiber filler high-efficiency filtration zone after the last layer of filtration; open the low-concentration sewage purification zone entrance. Concentration sewage valve, sewage is pumped from the sump at the bottom of the fiber packing high-efficiency filtration area to the low concentration baffle purification area through the low concentration sewage pump, and when the low concentration sewage pump is turned on, the low concentration sewage pump located in front of the low concentration sewage pump outlet The backflow gate is closed to prevent the sewage from flowing back to the previous area. After purification in the low-concentration baffle purification area, it flows to the stable outflow area.

Compared with the prior art, the multifunctional sensor-integrated flexible fabric-based sensor and its application provided by the present invention have the following beneficial effects:

1. The CSO regulation and storage purification system provided by the present invention is provided with a two-layer structure, the upper layer is for water storage, and the lower layer is for sewage purification, which can realize sewage purification in the regulation and storage tank, and does not require subsequent construction of enhanced treatment facilities.

2. The CSO regulation and storage purification system provided by the present invention, by setting three layers of filter layers with different filtration fineness and a baffle purification zone for processing three different concentrations in the high-efficiency filtration area of the fiber filler, can be based on the early pollution in the rainfall project. With the characteristics of high concentration of pollutants and low concentration of pollutants in the later stage, the sewage can be stored in different quality zones, and the sewage with different pollutant concentrations can be treated by grades, so as to reduce the input of resources, and realize the improvement of quality and efficiency of the CSO storage tank.

Description of drawings

Fig. 1 is a diagram of the lower functional division of the CSO purification, regulation and storage system according to the present invention.

Fig. 2 is the upper-layer functional zoning diagram of the CSO purification, regulation and storage system according to the quality and zoning of the present invention.

Fig. 3 is a transverse sectional view of the CSO purification and storage regulation system of the present invention, the left side is the sectional view of the inlet area, and the right side is the sectional view of the outlet area.

FIG. 4 is a grading diagram of the baffle purification zone of the CSO purification and storage regulation system of the present invention.

FIG. 5 is a detailed view of the drainage ditch of the regulating and storage tank of the CSO purification and regulating and storage system by quality and partition of the present invention.

reference number

1-Energy dissipation and water distribution area; 2-Enhanced sedimentation area; 3-High-efficiency filtration of fiber fillers; 4-Baffle purification area; 5-Stable outflow area; 6-Water storage area; 7-Overflow area; 11-Grid Pool area before grid; 12-coarse grid area; 13-energy dissipation sill; 14-even water diversion wall; 21-overflow device; 31-water distributor; 37-first layer of fiber filler filter layer; 32- The second layer of fiber filler filter layer; 33- the third layer of fiber filler filter layer; 34- the first layer of filter layer sewage valve; 35- the second layer of filter layer sewage valve; 36- the third layer of filter layer sewage valve; 41- High concentration baffle purification area; 42 - medium concentration baffle purification area; 43 - low concentration baffle purification area; 44 - folded plate; 411 - high concentration sewage valve; 412 - high concentration sewage chemical inlet; 413 - high concentration sewage Pump; 421-medium-concentration sewage valve; 422-medium-concentration sewage chemical inlet; 423-medium-concentration sewage pump; 424-medium-concentration anti-backflow gate; 431-low-concentration sewage valve; 432-low-concentration sewage chemical inlet; 433-low Concentration sewage pump; 434-low-concentration anti-backflow gate; 51-sewage pump outside the stabilization treatment area; 61, 62-high-concentration water storage chamber; 611-high-concentration water storage chamber outlet gate; 63, 64-medium-concentration water storage chamber ; 631 - outlet gate of medium concentration water storage room; 651 - outlet gate of low concentration water storage room; 65, 66 - low concentration water storage room; 71 - submersible sewage pump; 72 - overflow wall.

detailed description

The technical solutions of the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, common All other embodiments obtained by the skilled person without creative work fall within the protection scope of the present invention.

Referring to FIGS. 1-3 , an embodiment of the present invention provides a CSO regulation, storage and purification system with different quality and partitions for confluent sewage overflow pollution (CSO), which is divided into upper and lower layers, and the lower layer mainly includes overflow areas connected in sequence 7. Energy dissipation and water distribution area 1, enhanced sedimentation area 2, fiber filler high-efficiency filtration area 3 and baffle purification area 4. Wherein, the reinforced sedimentation zone 2 is connected with the fiber filler high-efficiency filtration zone 3 through an overflow pipe, and the fiber-filler high-efficiency filtration zone 3 is connected with the baffle purification zone 4 through a sewage pump. The upper layer mainly includes an overflow area 7 , an energy dissipation and water distribution area 1 and a water storage area 6 which are connected in sequence, and the water storage area is also connected with the overflow area 7 . Wherein, the water storage area 6 is connected with the energy dissipation and water distribution area 1 through a drainage ditch. The upper layer and the lower layer share the energy dissipation water distribution area 1 and the overflow area 7, so as to maximize the utilization of space, and increase the height of the water distribution area 1 and the overflow area 7, thereby increasing the water storage capacity.

Under normal circumstances, sewage is purified in the lower layer of the regulation, storage and purification system. The sewage enters the enhanced sedimentation tank 2 from the energy dissipation and water distribution area 1 for sludge sedimentation, and then is filtered through the fiber filler high-efficiency filter area 3 and then enters the baffle purification area 4. Purification; the upper water storage area 6 is used to store the sewage in the overflow area 7, and can enter the lower energy dissipation water distribution area 1 for graded purification.

Specifically, an overflow wall 72 and a submersible sewage pump 71 are provided between the energy dissipation water distribution area 1 and the overflow area 7 to separate the energy dissipation water distribution area 1 from the overflow area 7 The sewage in the overflow area 7 can be introduced into the energy dissipation and water distribution area 1 through the submersible sewage pump 71 and then be purified. The submersible sewage pump 71 is preferably a variable frequency sewage pump, so as to adjust the flow rate of the introduced sewage according to the amount of external sewage and the flow rate of the external discharge of the system.

In particular, in some embodiments, the energy dissipation and water distribution area 1 includes a grille fore tank 11, a coarse grille 12 and an energy dissipation sill 13; the grille fore tank 11 has a certain gradient in the longitudinal direction, and the plane is arranged in a trapezoid shape to The water flow is smoothly transitioned to the coarse grid 12, and the flow state is kept stable with a slope of 0.9%. The grid gap of the coarse grid 12 is set to 20mm~30mm, such as 25mm, which can intercept the grid slag larger than 25mm; the energy dissipation sill 13 adopts steps to dissipate energy, and the slope is 30°~35°, such as 33.69°, and the step width/step height ≥ 1.5, for example, 1.5, the step is followed by a stilling pool, and the overall energy dissipation rate is 70%. At the water outlet of the energy dissipation and water distribution area 1, a uniform water diversion wall 14 is arranged. The uniform water diversion wall 14 is composed of two elliptical holes for water distribution, and enters the enhanced sedimentation tank 2 through the uniform water diversion wall 14. The enhanced sedimentation tank 2. Overflow to the fiber packing high-efficiency filter zone 3 through the overflow pipe.

With the above structure, the rainwater passes through the grid front pool to make the water flow smoothly to the coarse grid to keep the flow state stable. The coarse grid can intercept the grid slag more than 25mm, and the overall energy dissipation rate of the energy dissipation sill can reach 70%; In the treatment of the water area, there is basically no screen slag above 25mm in the sewage; at the outlet of the energy dissipation water distribution area, a uniform water diversion wall is arranged, and the sewage in the energy dissipation water distribution area 1 enters the enhanced sedimentation tank 2 through the uniform water diversion wall 14 , it is convenient to adjust the velocity distribution of the water flow profile, to ensure the subsequent flow state is stable, and to help the subsequent settlement of suspended solids.

In some embodiments, the enhanced sedimentation tank 2 adopts advective flow, and is provided with a single bucket for sludge discharge, the aspect ratio is not less than 4, and the water depth is not less than 4m. At the same time, in order to facilitate sand discharge, the slope of the bottom is taken as 0.9%, the outlet is inclined to the single bucket, and the gate type flushing device is used at the end; space.

With the above structure, the bottom is set with a slope to facilitate sand discharge, and the single-bucket discharge is used to collect the sedimented sludge. Hydraulic down-opening weir gate is adopted, making full use of the underground space of CSO.

In particular, as shown in FIG. 3 , in some embodiments, the fiber filler high-efficiency filter zone 3 is a tower filter structure with three fiber filler filter layers: a first layer of fiber filler filter layer 37 , a second layer of fiber filler filter layer 37 The fiber filler filter layer 32 and the third layer fiber filler filter layer 33 . The filtration fineness of each filter layer increases sequentially from top to bottom; a water distributor 31 is arranged on the upper part of each fiber filler filter layer, the water distributor 31 is connected with the overflow pipe, and the inlet section of the water distributor 31 is arranged The first filter layer sewage valve 34, the second layer filter layer sewage valve 35, the third layer filter layer sewage valve 36, the bottom of the fiber packing high-efficiency filter area 3 is provided with a water collection tank, and the water collection tank is connected to the sewage pump through the sewage pump. The baffle purification zone 4 is connected.

In particular, the fiber filler high-efficiency filter zone 3 uses fiber filler as the filter material, and the fiber filler is made of at least one of nylon, vinylon, acrylic, and polyester fibers woven into bundles, and the porosity is more than 93%.

In one embodiment, in the tower filter structure in the high-efficiency filter zone 3 of the fiber filler, the height of each layer is 1.5-3m.

In one embodiment, the tower filter structure is assembled with a material frame, and is installed with a frame, which is convenient for installation and maintenance.

With the above structure, the fiber filler has high porosity, occupies less space for CSO storage, and basically does not affect the water storage function of CSO; fully utilize the characteristics of large space and deep depth of CSO to achieve a layered tower filter structure for different water quality The sewage with high concentration of pollutants is treated in three layers, the sewage with medium concentration of pollutants is treated with the upper double layer, and the sewage with low concentration of pollutants is treated with the bottom single layer.

The baffle purification zone 4 is divided into a high concentration baffle purification zone 41 , a medium concentration baffle purification zone 42 and a low concentration baffle purification zone 43 .

Referring to FIG. 4, in some embodiments, the inlet of the high-concentration baffle purification zone 41 includes a high-concentration sewage valve 411, a high-concentration sewage chemical inlet 412 and a high-concentration sewage pump 413, and the high-concentration sewage valve 411 is located at The front of the high-concentration sewage chemical inlet 412 is used to control whether water enters. The high-concentration sewage chemical inlet 412 is located in the suction pipe section of the high-concentration sewage pump 413, and the high-concentration sewage pump 413 The impeller rotates highly to achieve the purpose of rapid and violent mixing of the chemical. The medium-concentration baffle purification zone 42 includes a medium-concentration sewage valve 421, a medium-concentration sewage chemical inlet 422, a medium-concentration sewage pump 423 and a medium-concentration anti-backflow gate 424, and the medium-concentration sewage valve 421 is located in front of the medium-concentration sewage chemical inlet 422, The medium-concentration sewage chemical inlet 422 is located at the suction pipe section of the medium-concentration sewage pump 423, and the water outlet of the medium-concentration sewage pump 423 is located behind the medium-concentration anti-backflow gate 424. After the pump is started, the gate is closed to prevent sewage from flowing back to the previous area. .

The low-concentration baffled purification zone 43 includes a low-concentration sewage valve 431, a low-concentration sewage chemical inlet 432, a low-concentration sewage pump 433 and a low-concentration anti-backflow gate 434, and the low-concentration sewage valve 431 is located in front of the low-concentration sewage chemical inlet 432, The low-concentration sewage chemical inlet 432 is located in the suction pipe section of the low-concentration sewage pump 433, and the water outlet of the low-concentration sewage pump 433 is behind the low-concentration anti-backflow gate 434; Zone 5, the sewage is discharged through the sewage pump in the stable outflow zone 5.

In one embodiment, two uniform water diversion walls 14 are arranged in the stable outflow area 5 to ensure a stable water flow, and then the water is discharged out through a water pump.

In one embodiment, the reinforced sedimentation zone 2, the fiber filler high-efficiency filtration zone 3, the baffle purification zone 4 and the stable outflow zone 5 are all two, and the energy dissipation and water distribution zone 1 and the overflow zone 7 are two. Side symmetrical setup. With this arrangement, the space utilization is more adequate and reasonable, and the purification efficiency is also higher.

Referring to FIG. 5, in the upper area, the water storage area 6 is divided into high concentration water storage chambers 61, 62, medium concentration water storage chambers 63, 64 and low concentration water storage chambers 65, 66, and according to the The distances between the water distribution area 1 and the overflow area 7 are arranged from near to far.

In some embodiments, the gradient of each area of the water storage area 6 is 0.8-1.0%. The elevation near the drainage ditch is lower than that of the water storage area 6 . The drainage ditch is arranged on the lower side of the slope foot of the water storage chamber 6 , with a slope of 0.8-1.0%, and is used as a water delivery channel for the water storage area 6 . The outlet of the high concentration water storage chambers 61 and 62 is provided with a high concentration water storage chamber outlet gate 611, the outlet of the medium concentration water storage chambers 63 and 64 is provided with a medium concentration water storage chamber outlet gate 631, and the low concentration water storage chambers 65 and 66 There is a low concentration water storage chamber outlet gate 651 at the outlet, which can be used to adjust the outflow flow.

In one embodiment, in the upper region, the number of high-concentration water storage chambers 61, 62, medium-concentration water storage chambers 63, 64 and low-concentration water storage chambers 65, 66 are all four, and they are set in two groups. On both sides of the energy dissipation and water distribution area 1 and the overflow area 7 .

With the above structure, when the water level of the energy dissipation water distribution area 1 is higher than the starting water level, but lower than the top elevation of the overflow wall 72, it enters the lower layer for water purification, and enters the baffle purification area after three layers of filtration in the high-efficiency filter area 3 of the fiber filler. High, medium and low concentration baffle purification zones 41, 42, 43 are purified; when the water level is higher than the top elevation of the overflow wall 72, the water in the energy dissipation and water distribution zone 1 enters the overflow zone 7 through the overflow wall 72, With the continuous increase of the water impact, it enters the high-concentration water storage chambers 61, 62, medium-concentration water storage chambers 63, 64 and low-concentration water storage chambers 65, 66 on the upper layer in turn through the overflow area 7 for storage, and the sewage stored in the upper layer is then stored. Then enter the lower layer for classification purification. Among them, the water in the energy dissipation water distribution area 1, the overflow area 7 and the high-concentration water storage chambers 61 and 62 is filtered through the lower fiber filler high-efficiency filter area 3 and then enters the high, medium and low concentration baffles in the baffle purification area. Purification zones 41, 42, 43 are purified; the water in medium concentration water storage chambers 63, 64 enters the middle and low concentration baffle purification zones 42, 42 and 42 in the baffle purification zone 4 after being filtered by the upper two layers of the lower fiber filler high-efficiency filter zone 3. 43 for purification; the water in the low-concentration water storage chambers 65 and 66 is filtered through the lowermost layer of the fiber-filled high-efficiency filter zone 3 and then enters the low-concentration baffle purification zone 43 of the baffle purification zone 4 for purification. It realizes the quality and zoning storage of sewage, and carries out grading treatment of sewage with different pollutant concentrations, which reduces the resource input and realizes the improvement of quality and efficiency of the CSO storage tank.

The present invention also provides a method for purifying rainwater by adopting the quality and partition CSO regulation, storage and purification system recorded in the above scheme, and the specific operations are as follows:

S01. When the starting water level h of the CSO regulation, storage and purification system _starts < the sewage water level in the energy dissipation and distribution pool h≤the top elevation of the overflow wall h ₀ , no overflow occurs (N=0, N represents the number of overflows through the overflow wall) At the same time, the sewage is purified in the lower layer of the regulation, storage and purification system. The sewage enters the enhanced sedimentation tank 2 from the energy dissipation and water distribution area 1 for sludge sedimentation, and then passes through the fiber filler high-efficiency filter area 3. After three layers of filtration, it enters the baffle purification area 4 High, medium and low concentration baffle purification zones 41, 42, 43 are used for purification;

S02. When h=h ₀ , N=1, and the water depth H in the _overflow area 7 > 0, if the external sewage volume Q > the system discharge flow Q1, the energy dissipation water distribution area 1 and the overflow area will not be activated The submersible sewage pump between 7 and 7, the upper layer of the purification system plays the water storage function, and the sewage in the energy dissipation water distribution area 1 is purified according to the steps in S01; if the external sewage volume Q < the system discharge flow Q1, start the energy dissipation water distribution The submersible sewage pump 71 between the zone 1 and the overflow zone 7 introduces the water in the overflow zone 7 into the energy dissipation and water distribution zone 1 and then carries out purification treatment. The submersible sewage pump 71 is a variable frequency, and its flow rate Q2=Q1-Q( In order to ensure the maximum efficiency of sewage treatment), the sewage is purified according to the steps in S01;

S03. When h=h ₀ , N=1, H _{overflow area} =0, and the water depth h of _{the high} concentration water storage chambers 61 and 62 is higher than 0, and the water depth h _{of the} medium concentration water storage chambers 63 and 64 is greater than or equal to 0. , open the outlet gate 611 of the high-concentration water storage chamber, the sewage flows into the energy-dissipating water distribution area 1 through the drainage ditch, and the flow rate q _{is high} =Q1-Q (Q<Q1) or 0 (Q>Q1), the high-concentration water storage chamber The high-concentration sewage in 61 and 62 is purified according to the steps in S01;

S04. When h = h ₀ , N = 1, H _{overflow area} = 0, h _{high storage} = 0, h _{medium storage} > 0, low concentration water storage chambers 65 and 66 water depth h _{low storage} ≥ 0, open the medium concentration storage The water chamber outlet gate 631, the sewage flows into the energy dissipation and water distribution area 1 through the drainage ditch _, the flow rate q=Q1-Q (Q<Q1) or 0 (Q>Q1), the medium concentration sewage in the medium concentration water storage chambers 63 and 64 Enter the enhanced sedimentation tank 2 from the energy dissipation and water distribution area 1 for sludge sedimentation, and then pass through the two layers of the lower side of the fiber filler high-efficiency filter area 3 and then enter the medium and low concentration baffle purification areas 42 and 43 of the baffle purification area 4. purify;

S05. When h = h ₀ , N = 1, H _{overflow area} = 0, h _{high storage} = 0, h _{medium storage} = 0, h _{low storage} ≥ 0, open the outlet gate 651 of the low concentration water storage chamber, and the sewage It flows into the energy dissipation water distribution area 1 through the drainage ditch, and the flow rate q _{is low} = Q1-Q (Q<Q1) or 0 (Q>Q1). Enter the enhanced sedimentation tank 2 for sludge sedimentation, and then enter the low-concentration baffled purification zone 43 of the baffled purification zone 4 after filtering through the last layer of the fiber filler high-efficiency filter zone 3 for purification;

S06. When h=h ₀ , when the H _{overflow area} , h _{high storage} , h _{medium storage} , and h _{low storage} all reach the maximum value, the water storage capacity of the system reaches the maximum, and the sewage inlet of energy dissipation water distribution area 1 is closed.

In one embodiment, in S01, the sewage is purified in the lower layer of the regulation and storage system, and the sewage flows from the energy dissipation and water distribution area 1 into the enhanced sedimentation tank 2 for sludge sedimentation; The reinforced sedimentation zone 2 flows into the first layer of fiber filler filter layer water distributor connected with it through the overflow pipe, enters the first layer of fiber filler filter layer 37 through the water distributor, and enters the fiber after three layers of filtration from top to bottom. Fill the sump at the bottom of the high-efficiency filtration zone 3; open the high-concentration sewage valve 411 at the inlet of the high-concentration baffle purification zone 41, and the sewage is sent from the sump at the bottom of the fiber-filled high-efficiency filtration zone 3 to the high-concentration baffle through the high-concentration sewage pump 413 The purification zone 41 passes through the middle concentration 42 and the low concentration baffle purification zone 43 in turn. After the purification treatment in the high, medium and low concentration baffle purification zones, it flows to the stable outflow zone for outflow, and the sewage passes through the stable outflow zone 5 The internal sewage pump is discharged to the outside.

In one embodiment, in S04, the sewage flows from the energy dissipation and water distribution area 1 into the enhanced sedimentation tank 2 for sludge sedimentation, and the sewage valve 35 of the second filter layer is opened, and the sewage flows from the enhanced sedimentation area 2 through the overflow pipe. The second-layer fiber-filled filter layer water distributor connected to it enters the second-layer fiber-filled filter layer 32 through the water distributor, and enters the water collecting tank at the bottom of the fiber-filled high-efficiency filter zone 3 after two layers of filtration from top to bottom; open The medium-concentration sewage valve 421 in the inlet of the medium-concentration baffled purification zone 42, the sewage is sent to the medium-concentration baffled purification zone 42 from the sump at the bottom of the fiber-filled high-efficiency filtration zone 3 through the medium-concentration sewage pump 423, while the medium-concentration sewage pump 423 When opening, the medium-concentration anti-return gate 424 located in front of the water outlet of the medium-concentration sewage pump 423 is closed to prevent the sewage from flowing back to the previous area, and then passes through the low-concentration baffle purification zone 43, and passes through the medium and low concentration baffle purification zone 42. , 43 After purification treatment, flow to the stable outflow zone 5 for outflow.

In one embodiment, in S05, the sewage flows from the energy dissipation and water distribution area 1 into the enhanced sedimentation tank 2 for sludge sedimentation, and the sewage valve 36 of the third filter layer is opened, and the sewage flows from the enhanced sedimentation area 2 through the overflow pipe. The third layer of fiber filler filter layer water distributor connected with it, enters the third layer of fiber filler filter layer 33 through the water distributor, and enters the sump at the bottom of the fiber filler high-efficiency filter zone 3 after the last layer of filtration; open the low concentration The low-concentration sewage valve 431 in the inlet of the baffle purification zone 43, the sewage is sent to the low-concentration baffled purification zone 43 from the sump at the bottom of the fiber-filled high-efficiency filtration zone 3 through the low-concentration sewage pump 433, and when the low-concentration sewage pump 433 is turned on , the low-concentration anti-backflow gate 434 located in front of the water outlet of the low-concentration sewage pump 433 is closed to prevent the sewage from flowing back to the previous area.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (10)

1. A CSO regulation, storage and purification system by quality and partition is characterized in that it includes an upper layer area and a lower layer area, the lower layer area includes an overflow area, an energy dissipation water distribution area and a sewage purification area that are connected in sequence, and the upper layer area includes an overflow area. flow area, energy dissipation and water distribution area, and water storage area, the upper area and the lower area share the overflow area and the energy dissipation and water distribution area; the water storage area is connected with the overflow area and the dissipation area. The energy-dissipating water distribution areas are connected, and are used for storing the sewage in the overflow area and discharging it into the energy-dissipating water-distributing area for purification.
2. The CSO regulation, storage and purification system according to claim 1, wherein the water storage area includes a plurality of water storage chambers, which are respectively used to store sewage of different concentration levels, and the sewage purification area correspondingly includes Several stages of purification zones are used for grading treatment of the sewage of different concentration levels.
3. The CSO regulation and storage purification system according to claim 2, characterized in that, the sewage purification zone comprises a strengthening sedimentation zone, a fiber filler high-efficiency filter zone and a baffle purification zone, which are connected in sequence, and the fiber filler is a high-efficiency filter zone. The filter area is a tower filter structure including several levels of fiber packing filter layers, and the filter fineness of each layer of the fiber packing filter layers increases sequentially from top to bottom; the baffle purification area correspondingly includes several levels of baffle purification The zone is used for grading treatment of the sewage of different concentration levels.
4. The CSO regulation, storage and purification system according to claim 2, characterized in that, the concentration levels of several of the water storage chambers are from close to the energy dissipation water distribution and the overflow area to far away from the energy dissipation The direction of water distribution and the overflow area gradually decreases; the water storage chamber is connected to the energy dissipation water distribution area through a drainage ditch; the slope of each area of the water storage chamber is 0.8-1.0%, and the drainage The ditch is set on the lower side of the slope foot of the water storage chamber, and the slope is 0.8-1.0%.
5. The CSO regulation, storage and purification system according to claim 1, characterized in that, the energy dissipation and water distribution area comprises a grille fore pond, a coarse grille area and an energy dissipation sill; the grille fore pond has longitudinal The preset gradient, the plane layout is trapezoid, and the gradient is 0.6% to 1.0%; the grid gap of the coarse grid is set to 20mm to 30mm; The width/step height is ≥1.5; at the water outlet of the energy dissipation water distribution area, a uniform water diversion wall is arranged, and the uniform water diversion wall is composed of two elliptical holes and a water wall.
6. The CSO regulation, storage and purification system according to claim 3, characterized in that, the enhanced sedimentation tank adopts advective flow, and is provided with a single bucket to discharge mud, the length-width ratio is not less than 4, and the water depth is not less than 4m; It is 0.9-1.2%, inclined from the outlet to the single bucket, and the end adopts a door-type flushing device, and the door-type flushing device adopts a hydraulic down-opening weir gate.
7. The CSO regulation, storage and purification system according to claim 3, characterized in that, the fiber filler high-efficiency filter area adopts fiber filler as filter material, and the fiber filler is made of fiber material into bundles, and the porosity is 93% Above, the fiber material is at least one of nylon, vinylon, acrylic, and polyester.
8. The CSO regulation, storage and purification system according to claim 3, wherein the number of the enhanced sedimentation zone, the fiber filler high-efficiency filtration zone and the baffle purification zone are all two, and they are symmetrically arranged. On both sides of the energy dissipation water distribution area and the overflow area; the number of the water storage chambers for each concentration level is 4, and the two groups are symmetrically arranged in the energy dissipation water distribution area and the overflow area. both sides of the overflow area.
9. A method for regulating, storing and purifying CSO by quality and partition, characterized in that, adopting the system for regulating and storing CSO according to any one of claims 1 to 8 for sewage purification, comprising the following steps:

   S01. When the start-up water level h of the CSO regulation-storage purification system _starts < the energy-dissipating pool sewage water level h ≤ the top elevation h ₀ of the overflow wall, and no overflow occurs, the sewage is purified in the lower area of the regulation-storage and purification system;

   S02. When h=h ₀ , and the water depth of the overflow area H _{overflow area} > 0, if the external sewage volume Q < the system discharge flow Q1, start the submersible sewage pump between the energy dissipation water distribution area and the overflow area , the water in the overflow area is introduced into the energy dissipation water distribution area and then purified; if the external sewage volume Q > the system discharge flow Q1, the submersible sewage pump between the energy dissipation water distribution area and the overflow area will not be started. The water in the overflow area is introduced into the water storage area for water storage, and the sewage in the energy dissipation and water distribution area is purified according to the steps in S01;

   S03. When h=h ₀ , H _{overflow area} =0, and the water depth h of _{the high} -concentration water storage chamber is greater than 0, and the water depth of the medium-concentration water storage chamber h _is greater than or equal to 0, open the outlet gate of the high-concentration water storage chamber, Sewage flows into the energy dissipation and water distribution area through the drainage ditch for purification treatment at the corresponding level, and when Q<Q1, the flow rate is _high = Q1-Q, and when Q>Q1, the flow rate is _high = 0;

   S04. When h=h ₀ , H _{overflow area} == 0, h _{high storage} = 0, h _{medium storage} = 00, and the water depth of the low concentration water storage chamber h _{low storage} = ≥ 0, open the medium concentration storage chamber to exit Sluice gate, sewage flows into the energy dissipation and water distribution area through the drainage ditch for purification treatment at the corresponding level, and when Q<Q1, the flow rate _in q=Q1-Q, and when Q>Q1, the flow rate _in q=0;

   S05. When h = h ₀ , H _{overflow area} = 0, h _{high storage} = 0, h _{medium storage} = 0, h _{low storage} ≥ 0, open the outlet gate of the low concentration water storage chamber, and the sewage flows into the energy dissipation cloth through the drainage ditch The water area is purified at the corresponding level and when Q<Q1, and the flow rate q _{is low} =Q1-Q, when Q>Q1, the flow rate q _{is low} =0;

   S06. When h=h ₀ , when the H _{overflow area} , h _{high storage} , h _{medium storage} , and h _{low storage} all reach the maximum value, the water storage capacity of the system reaches the maximum, and the sewage inlet of the energy dissipation water distribution area is closed.
10. The method for regulating and storing CSO according to claim 9, characterized in that, in step S01, purifying the sewage in the lower area of the regulating and storing system comprises: the sewage flows from the energy dissipation and water distribution area into the enhanced sedimentation tank for sludge Sewage sedimentation; open the sewage valve of the first layer of filter layer, the sewage flows from the enhanced sedimentation area through the overflow pipe into the first layer of fiber packing filter layer water distributor, which is connected to it, and enters the first layer of fiber filler filter layer through the water distributor. After three layers of filtration, it enters the water collecting tank at the bottom of the high-efficiency filtration area of the fiber packing; open the high-concentration sewage valve at the entrance of the high-concentration sewage purification area, and the sewage passes through the high-concentration sewage pump from the collecting tank at the bottom of the high-efficiency filtration area of the fiber packing. It is sent to the high-concentration baffle purification zone, and then passes through the medium-concentration and low-concentration baffle-purification zones in turn. After purification in the high, medium, and low-concentration baffle purification zones, it flows to the stable outflow zone for outflow;

    In step S04, sewage flows from the energy dissipation and water distribution area into the enhanced sedimentation tank for sludge sedimentation, the sewage valve of the second filter layer is opened, and the sewage flows from the enhanced sedimentation area through the overflow pipe into the second layer of fiber packing filter layer that communicates with it. The water distributor enters the second layer of fiber packing filter layer through the water distributor and enters the water collecting tank at the bottom of the high-efficiency filtration zone of the fiber packing after two layers of filtration from top to bottom; open the medium-concentration sewage at the entrance of the medium-concentration sewage purification zone Valve, sewage is pumped from the sump at the bottom of the fiber packing high-efficiency filtration area to the medium-concentration baffle purification area through the medium-concentration sewage pump. At the same time, when the medium-concentration sewage pump is turned on, the medium-concentration anti-backflow gate located in front of the outlet of the medium-concentration sewage pump It is closed to prevent the sewage from flowing back to the previous area, and then passes through the low-concentration baffle purification area, and then flows to the stable outflow area after being purified in the medium and low concentration baffle purification area;

    In step S05, the sewage flows from the energy dissipation and water distribution area into the enhanced sedimentation tank for sludge sedimentation, the valve of the third layer of fiber packing filter layer water distributor is opened, and the sewage flows from the enhanced sedimentation area through the overflow pipe into the third layer connected with it. layer of fiber filler filter layer water distributor, enter the third layer of fiber filler filter layer through the water distributor, and enter the sump at the bottom of the fiber filler high-efficiency filtration zone after the last layer of filtration; open the low-concentration sewage purification zone entrance. Concentration sewage valve, sewage is pumped from the sump at the bottom of the fiber packing high-efficiency filtration area to the low concentration baffle purification area through the low concentration sewage pump, and when the low concentration sewage pump is turned on, the low concentration sewage pump located in front of the low concentration sewage pump outlet The backflow gate is closed to prevent the sewage from flowing back to the previous area. After purification in the low-concentration baffle purification area, it flows to the stable outflow area.

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