WO2019085187A1

WO2019085187A1 - Method for controlling afflux of sewage in sewage interception pipe in various areas of drainage system into trunk sewer during rainfall

Info

Publication number: WO2019085187A1
Application number: PCT/CN2017/116934
Authority: WO
Inventors: 周超
Original assignee: 武汉圣禹排水系统有限公司
Priority date: 2017-10-30
Filing date: 2017-12-18
Publication date: 2019-05-09
Also published as: CN107859135A

Abstract

A method for controlling afflux of sewage in a sewage interception pipe in various areas of a drainage system into a trunk sewer during rainfall. Where existing resources are used to the maximum, by means of rational configuration, a water body with a relatively great degree of water body pollution in various areas is preferentially allocated, at most, via a sewage interception pipe to an end of a system, i.e. an end of a trunk sewer, and then enters a sewage treatment plant for treatment. In this way, the pollution level of sewage in a segmentation area can be reduced to the greatest extent, and at the same time, relatively clean rainwater is not discharged into a sewage treatment plant, thereby reducing the load of the sewage treatment plant, and realizing optimized configuration of existing resources. Further disclosed is a system for controlling afflux of sewage in a sewage interception pipe in various areas of a drainage system into a trunk sewer during rainfall.

Description

Method for controlling sewage in sewage intercepting pipe of various sections in sewage system to flow into sewage main pipe during rainfall

Technical field

The invention belongs to the technical field of drainage system regulation, and particularly relates to a method for controlling sewage in a sewage intercepting pipe of each piece in a drainage system to flow into a sewage main pipe during rainfall.

Background technique

In the current society, urbanization is developing more and more rapidly, the area of the city is getting larger and larger, the structure of the urban drainage pipe network is becoming more and more complex, and the processing pressure of the urban water treatment system is getting larger and larger.

The traditional urban pipe network system uses a large rainwater treatment system to take charge of a large catchment area. Because the catchment area is too large, the delay time of rainwater on the pipeline or surface runoff is not fully considered, resulting in initial rainwater. Mixed with the late rain. For example, a city has a storage tank in an area close to the urban sewage treatment system. Assuming that the M area is 1 Km away from the storage tank, urban rainwater in the M area is directly discharged to the storage tank through the pipe network, and the initial rainwater of the city in the M area. The time to completely discharge into the storage tank is T1. For areas farther away from the storage area of the area, it is assumed that the linear distance from the N area to the storage tank is 10 km, and the time when the initial rainwater in the N area is completely discharged into the storage tank is T2, in terms of length of time, T2 is obviously much larger than T1. When the storage tank is full, the excess rainwater will be automatically discharged into the natural water body. The time from the start of collecting the rainwater to the beginning of the discharge to the natural water body is T3. In actual operation, if only the rainwater discharge in the M area is taken into consideration, the initial rainwater in the M area can enter the sewage treatment system through the storage tank, and the clean rainwater in the later stage can be discharged into the natural water body. T3 is required to be greater than T1. T3, the storage tank immediately discharges to the natural water body. At this time, the rainwater flowing to the storage tank in the N area is still the heavily polluted initial rainwater, that is, the T3 is less than T2, and the discharge to the natural water body will undoubtedly cause serious pollution.

If only the rainwater discharge in the N region is considered, that is, T3 is greater than T2, the initial rainwater in the N region It can be processed into the urban sewage treatment system through the storage tank and is well treated. However, for the M area, there is a large amount of post-clean rainwater in the M area, which is also discharged into the urban sewage treatment plant during the time when the storage tank discharges the initial rainwater in the N area. Such emissions will cause great impact on the urban sewage system. Handle pressure. In addition, the actual operation of the pipe network in the M area and the N area is generally connected. Due to the different distances and the detention on the road, the initial rainwater in the N area may seriously pollute the late clean rainwater in the M area, which may also cause rainwater discharge. The situation is unreasonable.

At present, a technical solution for solving the above problem has been proposed in the prior art, that is, the urban pipe network system is re-divided according to the unit area by using the fragmentation processing method, but the current pipe network system is generally applicable to the sunny state. Under the circumstance, when the rainwater falls temporarily, the maximum flow rate of the sewage main pipe is limited due to the limited processing capacity of the sewage treatment plant in the pipe network; when heavy rain or heavy rain occurs, the water body in each unit area cannot be discharged to the sewage treatment plant at the same time. This has led to the emergence of different levels of waterlogging disasters in various unit areas.

Summary of the invention

In order to improve the deficiencies of the prior art, an object of the present invention is to provide a method for controlling the sewage in the sewage intercepting pipes of various sections in the drainage system to flow into the sewage main pipe during rainfall. The method is applicable to the total amount of sewage flowing into the sewage main pipe in each piece when the rainfall is greater than the maximum flow rate that the sewage main pipe can circulate at the moment and/or the maximum capacity that the sewage treatment plant can handle, and the method can specifically have different pollution. The rapid and effective discharge of water within the extent of the area.

The object of the present invention is achieved by the following technical solutions:

A method for controlling sewage in a sewage intercepting pipe in a drainage system to flow into a sewage main pipe during rainfall, the drainage system comprising a plurality of sections divided by zones, a sewage intercepting pipe of each zone, and a sewage main pipe; The intercepting pipe of each piece is connected to the sewage main pipe, and the end of the drainage system (ie, the end of the sewage main pipe) is connected to the sewage treatment plant;

Assuming that the maximum flow rate that can be accepted at the end of the system (ie, the end of the sewage main pipe) is Q, then Q takes the minimum of Q1 and Q2, where Q1 is the maximum flow rate that the sewage treatment plant can handle, and Q2 is the dry water. Maximum flow of the pipe;

The method includes:

Monitor the degree of water pollution in the intercepting pipes of each area, and control the flow rate of the intercepting pipes of each piece to the end of the system (ie, the end of the sewage main pipe) according to the degree of pollution, so that the sum of the flow rates of the intercepting pipes of each piece It is equal to the maximum flow rate Q that can be actually accepted at the end of the system (ie, the end of the sewage main pipe), and the method includes the following steps:

1) When the degree of water pollution is different: open the intercepting pipe of the corresponding piece in the order of the degree of water pollution in the intercepting pipe of each piece until the sum of the flow rates of the intercepting pipes of each piece is equal to the end of the system (ie sewage) The maximum flow rate Q that can actually be accepted at the end of the main pipe;

2) When the degree of water pollution is the same: control the flow rate of the intercepting pipe of each piece, so that the sum of the flow rates of the intercepting pipes of each piece is equal to the maximum flow rate Q that can be accepted at the end of the system (ie, the end of the sewage main pipe), the control The method selects one of the following methods:

(a) controlling the flow rate of the intercepting pipe of each zone to be the same;

(b) controlling the flow rate of the intercepting pipe of each corresponding piece according to the ratio of the area of the catchment area corresponding to each piece;

(c) controlling the flow rate of the intercepting pipes of the respective respective sections according to the ratio of the flow path area of the sewage intercepting pipes of the respective sections.

According to the invention, step 1) specifically comprises the following steps:

Monitor the water quality of the interception pipe in each zone. According to the degree of water pollution (concentration of pollutants in the water), the order of the pollutants is C1>C2>C3>...>Cm>...>Cn. The intercepting pipe corresponding to C1 is opened. When the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, the concentration of the pollutant is opened to the intercepting pipe corresponding to C2, when the end of the system (ie, the end of the sewage main pipe) If the flow rate is still lower than Q, continue to open the sewage interception pipe with the concentration of pollutants corresponding to C3, and so on. When the pollutant interception pipe corresponding to the concentration of Cm is opened, the end of the system will be caused (ie, the end of the sewage main pipe) When the flow rate exceeds Q, the concentration of the pollutant is appropriately adjusted to be the flow rate on the intercepting pipe corresponding to Cm, so that the flow rate at the end of the system (ie, the end of the sewage main pipe) is equal to Q.

Preferably, step 1) specifically comprises the following steps:

Monitor the water quality of the interception pipe in each zone. According to the degree of water pollution (concentration of pollutants in the water), the order of the pollutants is C1>C2>C3>...>Cm>...>Cn. The intercepting pipe corresponding to C1 is opened. When the concentration of the pollutant is the maximum value of the water switch on the intercepting pipe corresponding to C1, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then the pollutant is opened. The concentration of the sewage intercepting pipe corresponding to C2, when the concentration of the pollutant is C2 corresponding to the sewage switch on the sewage pipe to the maximum value, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then continue to open the pollution The concentration of the substance is the intercepting pipe corresponding to C3, and so on. When the water switch on the sewage intercepting pipe corresponding to the concentration of the pollutant is opened to the maximum, the flow rate at the end of the system (ie, the end of the sewage main pipe) is exceeded. Q, the concentration of the pollutant is appropriately adjusted to the water switch on the intercepting pipe corresponding to Cm, so that the flow rate at the end of the system (ie, the end of the sewage main pipe) is equal to Q.

According to the invention, the method further comprises:

3) Set the standard emission value of pollutant concentration C0; when the pollution level of the water body in a certain area reaches the set discharge value C0 of the pollutant concentration, the interception of the area is completed, then the interception pipe of the corresponding area is closed, according to the above method Continue to control the flow of the interception pipe in other areas.

Preferably, the pollutant concentration standard emission value C0 is set in the control unit of the control system according to the environmental capacity of the discharged natural water body and the degree of water pollution in the sheet area.

According to the present invention, the water pollution level of the certain area reaches the set pollutant concentration. The standard discharge value C0 means that the water pollution degree of a certain area is less than the set pollutant concentration standard discharge value C0.

According to the present invention, the environmental capacity of the discharged natural water body may be a natural water body such as a river, a lake or a sea; when the natural water body has a large environmental capacity (such as an ocean), the standard concentration of the pollutant concentration C0 may be appropriately increased; The natural water body has a small environmental capacity (such as a lake), and the standard concentration of pollutant concentration C0 can be appropriately reduced.

According to the present invention, the end of the sewage main pipe is connected to the sewage treatment plant through the storage and storage system. When the storage system is opened, the maximum flow rate Q that can be actually received at the end of the sewage main pipe is Q2; when the storage system is closed, Q is The minimum of Q1 and Q2.

According to the present invention, the ratio of the flow passage area of the sewage intercepting pipe of each piece area controls the flow rate of the intercepting pipe of each corresponding piece area, which means that the proportion of the flow path area of the intercepting pipe of each piece area is assigned The flow rate of the intercepting pipes of each of the sections is such that the sum of the flow rates of the intercepting pipes of the respective sections is equal to Q.

Preferably, the ratio of the flow area of the intercepting pipe of each of the pieces is the same as the ratio of the flow rate of the intercepting pipes of the respective pieces.

According to the present invention, the flow rate of the intercepting pipe of each corresponding piece area is controlled according to the ratio of the area of the water receiving area corresponding to each piece area, and the corresponding pieces are allocated according to the proportion of the area of the water receiving area corresponding to each piece area. The flow rate of the intercepting pipe is such that the sum of the flow rates of the intercepting pipes of the respective sections is equal to Q.

According to the invention, the sewage mains include one or more storage systems along the line, and the storage systems may be connected in series or in parallel. The storage and storage facilities include a storage tank, a storage tank culvert, a deep tunnel or a shallow tunnel.

According to the invention, the drainage system further includes a water switch disposed on the sewage intercepting pipe of each of the panels.

According to the present invention, the drainage system further includes a control system including a device for monitoring water quality of the water body and a control unit coupled to the signal thereof; the control unit is coupled to a water switch signal on the intercepting pipe of each of the segments; The monitoring device is used for monitoring the water quality of the water body, generating a water quality monitoring signal, and transmitting the generated water quality monitoring signal to the control unit, and the control unit controls the opening degree of the water switch on the sewage intercepting pipe of each piece according to the received water quality monitoring signal.

According to the present invention, the device for monitoring water quality is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH ₃ -N monitor, an online TP monitor, and an online The TN monitor, the electrode, the conductivity meter, etc., the device for monitoring the water quality of the water body can monitor the concentration of the pollutant in the water body, and the pollutant includes one of TSS, COD, BOD, NH ₃ -N, TN or TP. Or several.

According to the present invention, the water quality detector may be configured to detect water quality by using an electrode method, a UV optical method, an optical scattering method, or the like.

According to the invention, the water switch on the sewage intercepting pipe of each of the panels is independently selected from the valve (ball Valves, gate valves, knife gate valves, butterfly valves, lift rubber plate shut-off check valves, etc.), gates (upper open gates, lower open gates, etc.), slamming doors (opening slamming doors, lower opening slamming doors, rotating) One of the type of door, etc.), the door (cutting door, etc.).

According to the present invention, the division according to the area is not limited, and may cover a larger area, and may also cover a smaller area. For example, the area may be divided by an area of 0.04-2 square kilometers. One or more rainwater treatment facilities may be included in the area.

According to the invention, the sewage intercepting pipes of the respective panels are connected to the rainwater treatment facility of the panel.

According to the present invention, the rainwater treatment facility is selected from at least one of an accommodation facility, an in-line treatment facility, and a diversion well.

The invention also provides a control system suitable for the above method, the control system comprising a device for monitoring the water quality of the water body and a control unit connected to the signal; the control unit is connected with a water switch signal on the sewage intercepting pipe of each piece; The monitoring device is configured to monitor the water quality of the water body, generate a water quality monitoring signal, and send the generated water quality monitoring signal to the control unit, and the control unit controls the opening degree of the water switch on the sewage intercepting pipe of each piece according to the received water quality monitoring signal.

The beneficial effects of the invention:

(1) In the case of utilizing the existing resources to the maximum extent, the water body with a greater degree of water pollution in each zone is preferentially distributed to the end of the system through the interception pipe (ie, the sewage is dry). In the end of the pipe, it is then treated in a sewage treatment plant. This can divide the sewage The degree of pollution in the area is minimized, and the clean rainwater is not discharged into the sewage treatment plant, reducing the load on the sewage treatment plant, thereby optimizing the existing resources.

(2) The method of the present invention is directed to different degrees of pollution of sewage and rainwater that are sent to the sewage main pipe at the same time in different sections of the system, and is reasonably distributed according to the degree of water pollution in each zone, and is targeted to be different. The water in the polluted area is quickly and efficiently discharged, so as to achieve reasonable discharge of water.

(3) The method of the present invention is simple and easy to operate.

Detailed ways

The invention is further illustrated below in conjunction with specific embodiments. It is to be understood that the examples are merely illustrative of the invention and are not intended to limit the scope of the invention. In addition, it is to be understood that various modifications and changes may be made to the present invention without departing from the scope of the invention.

Example 1

Assuming that the maximum flow rate that can be accepted at the end of the system (ie, the end of the sewage main pipe) is Q, then Q takes the minimum value of Q1 and Q2, where Q1 is the maximum flow rate that the sewage treatment plant can handle, and Q2 is the sewage main pipe. Maximum flow;

The method includes:

Monitor the degree of water pollution in the intercepting pipes of each area, and control the flow rate of the intercepting pipes of each piece to the end of the system (ie, the end of the sewage main pipe) according to the degree of pollution, so that the sum of the flow rates of the intercepting pipes of each piece Equal to the maximum flow rate Q that can be accepted at the end of the system (ie, at the end of the mains) The method includes the following steps:

In a preferred embodiment of the present invention, step 1) specifically includes the following steps:

Monitor the water quality of the interception pipe in each zone. According to the degree of water pollution (concentration of pollutants in the water), the order of the pollutants is C1>C2>C3>...>Cm>...>Cn. The intercepting pipe corresponding to C1 is opened. When the concentration of the pollutant is the maximum value of the water switch on the intercepting pipe corresponding to C1, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then the pollutant is opened. The concentration is corresponding to C2 The interception pipe, when the concentration of the pollutant is C2 corresponding to the sewage switch on the sewage pipe to the maximum value, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then the concentration of the pollutant is continuously turned on as C3 Corresponding sewage interception pipe, and so on, when the water conservancy switch on the sewage interception pipe corresponding to the concentration of pollutants is opened to the maximum, the flow rate at the end of the system (ie, the end of the sewage main pipe) exceeds Q, and then the adjustment is appropriately adjusted. The concentration of the pollutant is the water switch on the intercepting pipe corresponding to Cm, so that the flow rate at the end of the system (ie, the end of the sewage main pipe) is equal to Q.

In a preferred embodiment of the present invention, the method further includes:

In a preferred embodiment of the invention, the pollutant concentration standard emission value C0 is set in the control unit of the control system based on the environmental capacity of the discharged natural water body and the degree of water pollution in the zone.

In a preferred embodiment of the present invention, the water pollution level of the certain area reaches the set pollutant concentration. The standard discharge value C0 means that the water pollution degree of a certain area is less than the set pollutant concentration standard discharge value C0.

In a preferred embodiment of the present invention, the environmental capacity of the discharged natural water body may be a natural water body such as a river, a lake or a sea; when the natural water body has a large environmental capacity (such as a sea), the standard concentration of the pollutant concentration C0 may be Appropriate increase; when the environmental capacity of the natural water body is small (such as a lake), the standard emission value C0 of the pollutant concentration can be appropriately reduced.

In a preferred embodiment of the present invention, the end of the sewage main pipe is connected to the sewage treatment plant through the storage and storage system. When the storage system is opened, the maximum flow rate Q that can be actually received at the end of the sewage main pipe is Q2; When the system is shut down, Q is the minimum value of Q1 and Q2.

In a preferred embodiment of the present invention, the ratio of the flow passage area of the intercepting pipe of each piece area controls the flow rate of the intercepting pipe of each corresponding piece area, and refers to the flow path area of the intercepting pipe according to each piece area. The ratio of the interception pipe to the corresponding individual zones, and the interception pipe of each zone The sum of the flows is equal to Q.

In a preferred embodiment of the present invention, the ratio of the area of the flow passage of the respective section intercepting pipes is the same as the ratio of the flow rates corresponding to the intercepting pipes of the respective sections.

In a preferred embodiment of the present invention, the flow rate of the intercepting pipe corresponding to each of the respective pieces is controlled according to the ratio of the area of the water receiving area corresponding to each of the pieces, and the ratio of the area of the water receiving area corresponding to each piece is The flow rates of the intercepting pipes of the respective individual sections are distributed, and the sum of the flow rates of the intercepting pipes of the respective zones is equal to Q.

In a preferred embodiment of the invention, the sewage main pipe comprises one or more storage systems along the line, and the storage system may be connected in series or in parallel. The storage and storage facilities include a storage tank, a storage tank culvert, a deep tunnel or a shallow tunnel.

In a preferred embodiment of the invention, the drainage system further includes a water switch disposed on the sewage intercepting pipe of each of the panels.

In a preferred embodiment of the present invention, the drainage system further includes a control system including a device for monitoring water quality of the water body and a control unit connected to the signal thereof; the control unit and the sewage intercepting pipe of each of the pieces The water switch signal is connected; the monitoring device is used for monitoring the water quality of the water body, generating a water quality monitoring signal, and transmitting the generated water quality monitoring signal to the control unit, and the control unit controls the water switch on the sewage intercepting pipe of each piece according to the received water quality monitoring signal. Opening.

In a preferred embodiment of the present invention, the device for monitoring water quality is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH ₃ -N monitor, An online TP monitor, an online TN monitor, an electrode, a conductivity meter, etc., wherein the device for monitoring water quality can monitor the concentration of pollutants in a water body, including TSS, COD, BOD, NH ₃ -N, TN Or one or more of the TP.

In a preferred embodiment of the present invention, the water quality detector may be configured to detect water quality by using an electrode method, a UV optical method, an optical scattering method, or the like.

In a preferred embodiment of the present invention, the water switch on the sewage intercepting pipe of each piece is independently selected from a valve (ball valve, gate valve, knife gate valve, butterfly valve, lift rubber plate shut-off check valve, etc.), gate One of (opening gate, lower opening gate, etc.), slamming door (opening type slamming door, lower opening type slamming door, rotary slamming door, etc.), shooting door (cutting door, etc.).

In a preferred embodiment of the present invention, the division by region is not limited, and may cover a larger area, and may also cover a smaller area. For example, the area may be divided according to an area of 0.04-2 square kilometers. One or more rainwater treatment facilities may be included in the area.

In a preferred embodiment of the invention, the fouling tubes of the respective panels are connected to a rainwater treatment facility of the panel.

In a preferred embodiment of the invention, the rainwater treatment facility is selected from at least one of an accommodation facility, an in-line treatment facility, and a split shaft.

Example 2

The drainage system further includes a water switch disposed on the sewage intercepting pipe of each of the sections;

The drainage system further includes a control system including a device for monitoring water quality of the water body and a control unit connected to the signal thereof; the control unit is connected with a water switch signal on the intercepting pipe of each of the pieces; Monitoring the water quality of the water body, generating a water quality monitoring signal, and transmitting the generated water quality monitoring signal to the control unit, and the control unit controls the opening degree of the water switch on the sewage intercepting pipe of each piece according to the received water quality monitoring signal;

If the end of the sewage main pipe is connected to the sewage treatment plant through the storage system, when the storage system is opened, the maximum flow rate Q that can be actually accepted at the end of the sewage main pipe is Q2; when the storage system is closed, Q is Q1 and Q2. Minimum value

The method includes:

Specifically, the water quality of the water intercepting pipe in each piece is monitored, and the order of the water body pollution (the concentration of the pollutant in the water body) is from large to small C1>C2>C3>...>Cm>...>Cn, firstly the pollutant The concentration of the intercepting pipe corresponding to C1 is opened. When the concentration of the pollutant is the maximum value of the water switch on the intercepting pipe corresponding to C1, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then the opening is opened. The concentration of the pollutant is the intercepting pipe corresponding to C2. When the concentration of the pollutant is the maximum value of the water switch on the intercepting pipe corresponding to C2, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q. Continue to open the sewage interception pipe with the concentration of pollutants corresponding to C3, and so on. When the water conservancy switch on the sewage interception pipe corresponding to the concentration of the pollutant is opened to the maximum, the end of the system (ie, the end of the sewage main pipe) will be caused. If the flow rate exceeds Q, the concentration of the pollutant is appropriately adjusted to be the water switch on the intercepting pipe corresponding to Cm, so that the flow rate at the end of the system (ie, the end of the sewage main pipe) is equal to Q;

(a) controlling the flow rate of the intercepting pipes of the respective sections to be the same; specifically, controlling the flow rate of the intercepting pipes of the respective sections to be the same; that is, the average flow rate of the maximum flow Q that can be accepted at the end of the system (ie, the end of the sewage main pipe) The intercepting pipes of the respective sections are arranged such that the flow rates on the intercepting pipes of the respective sections are the same, and the sum is Q; for example, if a certain area includes three sections, the flow rate of the intercepting pipes of the three sections is Q. /3;

(b) controlling the flow rate of the intercepting pipe of each corresponding piece according to the proportion of the area of the catchment area corresponding to each piece; specifically, controlling the interception of the corresponding pieces according to the proportion of the area of the catching area corresponding to each piece The flow rate of the pipe; that is, the maximum flow rate Q that can be actually received at the end of the system (ie, the end of the sewage main pipe) is allocated according to the proportion of the area of the water receiving area corresponding to each piece, and the flow rate of the intercepting pipe of each corresponding piece is allocated. For example, the maximum flow rate that can be accepted at the end of the system (ie, the end of the sewage main pipe) is Q, and the system includes three zones, and the ratio of the area of the catchment area corresponding to the three zones is 2:1:3, then three The flow ratio of the intercepting pipe in the area should be 2:1:3, that is, the flow rates of the intercepting pipes of the three sections are 2Q/6, Q/6 and 3Q/6, respectively;

(c) controlling the flow rate of the intercepting pipes of the respective respective sections according to the proportion of the flow passage area of the sewage intercepting pipes of the respective sections; specifically, controlling the corresponding respective zones according to the proportion of the flow passage area of the intercepting pipes of the respective zones The flow rate of the intercepting pipe; that is, the maximum flow rate Q that can be actually received at the end of the system (ie, the end of the sewage main pipe) is allocated according to the proportion of the flow channel area of the intercepting pipe of each piece to distribute the flow rate of the intercepting pipe of each corresponding piece; For example, the maximum flow rate that can be accepted at the end of the system (ie, the end of the mains of the sewage pipe) is Q, and the system includes three zones, and the ratio of the flow passage area of the interception pipes of the three zones is 4:5:6. The flow ratio of the sewage intercepting pipes of the three sections is 4:5:6, that is, the flow rates of the intercepting pipes of the three sections are 4Q/15, 5Q/15 and 6Q/15, respectively;

3) According to the environmental capacity of the discharged natural water body and the degree of water pollution in the area, the standard concentration of pollutant concentration C0 is set in the control unit of the control system; when the degree of water pollution in a certain area reaches the set pollutant concentration When the standard discharge value C0 is completed, the sewage interception pipe of the corresponding zone is closed, and the flow rate of the sewage interception pipe of the other zone is continuously controlled according to the above method; specifically, for example, the end of the system (ie, the end of the sewage main pipe) is actually The maximum flow that can be accepted is Q. The system includes three zones. When the water pollution level of the first zone reaches the set pollutant concentration standard discharge value C0, it indicates that the interception of the zone is completed, then the interception of the zone is closed. The tube continues to control the flow rate of the intercepting pipe of the second zone and the third zone as described above.

Example 3

The embodiment provides a control system suitable for the method described in Embodiment 1 or Embodiment 2, the control system includes a device for monitoring the water quality of the water body and a control unit connected to the signal; the control unit and the interception of each piece The water switch signal connection on the pipe; the monitoring device is used for monitoring the water quality of the water body, generating a water quality monitoring signal, and transmitting the generated water quality monitoring signal to the control unit, and the control unit controls the sewage intercepting pipe of each piece according to the received water quality monitoring signal The opening of the water switch.

In a preferred embodiment of the present invention, the device for monitoring water quality is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH ₃ -N monitor, An online TP monitor, an online TN monitor, an electrode, a conductivity meter, etc., wherein the device for monitoring water quality can monitor the concentration of pollutants in a water body, including TSS, COD, BOD, NH ₃ -N, TN Or one or more of the TP. The water quality detector may be configured to detect water quality by using an electrode method, a UV optical method, an optical scattering method, or the like.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for controlling sewage in a sewage intercepting pipe in a drainage system to flow into a sewage main pipe during rainfall, characterized in that the drainage system comprises a plurality of sections divided by zones, a sewage intercepting pipe of each zone, and sewage a trunk pipe; the sewage intercepting pipe of each of the sections is connected to the sewage main pipe, and the end of the drainage system (ie, the end of the sewage main pipe) is connected to the sewage treatment plant;

Assuming that the maximum flow rate that can be accepted at the end of the system (ie, the end of the sewage main pipe) is Q, then Q takes the minimum value of Q1 and Q2, where Q1 is the maximum flow rate that the sewage treatment plant can handle, and Q2 is the sewage main pipe. Maximum flow;

The method includes:

Monitor the degree of water pollution in the intercepting pipes of each area, and control the flow rate of the intercepting pipes of each piece to the end of the system (ie, the end of the sewage main pipe) according to the degree of pollution, so that the sum of the flow rates of the intercepting pipes of each piece It is equal to the maximum flow rate Q that can be actually accepted at the end of the system (ie, the end of the sewage main pipe), and the method includes the following steps:

1) When the degree of water pollution is different: open the intercepting pipe of the corresponding piece in the order of the degree of water pollution in the intercepting pipe of each piece until the sum of the flow rates of the intercepting pipes of each piece is equal to the end of the system (ie sewage) The maximum flow rate Q that can actually be accepted at the end of the main pipe;

2) When the degree of water pollution is the same: control the flow rate of the intercepting pipe of each piece, so that the sum of the flow rates of the intercepting pipes of each piece is equal to the maximum flow rate Q that can be accepted at the end of the system (ie, the end of the sewage main pipe), the control The method selects one of the following methods:

(a) controlling the flow rate of the intercepting pipe of each zone to be the same;

(b) controlling the flow rate of the intercepting pipe of each corresponding piece according to the ratio of the area of the catchment area corresponding to each piece;

(c) controlling the flow rate of the intercepting pipes of the respective respective sections according to the ratio of the flow path area of the sewage intercepting pipes of the respective sections.
The method of claim 1 wherein step 1) comprises the steps of:

Monitor the water quality of the interception pipe in each zone. According to the degree of water pollution (concentration of pollutants in the water), the order of the pollutants is C1>C2>C3>...>Cm>...>Cn. The intercepting pipe corresponding to C1 is opened. When the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, the concentration of the pollutant is opened to the intercepting pipe corresponding to C2, when the end of the system (ie, the end of the sewage main pipe) If the flow rate is still lower than Q, continue to open the sewage interception pipe with the concentration of pollutants corresponding to C3, and so on. When the pollutant interception pipe corresponding to the concentration of Cm is opened, the end of the system will be caused (ie, the end of the sewage main pipe) When the flow rate exceeds Q, the concentration of the pollutant is appropriately adjusted to be the flow rate on the intercepting pipe corresponding to Cm, so that the flow rate at the end of the system (ie, the end of the sewage main pipe) is equal to Q.
The method according to claim 1 or 2, wherein the step 1) comprises the following steps:

Monitor the water quality of the interception pipe in each zone. According to the degree of water pollution (concentration of pollutants in the water), the order of the pollutants is C1>C2>C3>...>Cm>...>Cn. The intercepting pipe corresponding to C1 is opened. When the concentration of the pollutant is the maximum value of the water switch on the intercepting pipe corresponding to C1, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then the pollutant is opened. The concentration of the sewage intercepting pipe corresponding to C2, when the concentration of the pollutant is C2 corresponding to the sewage switch on the sewage pipe to the maximum value, the flow rate at the end of the system (ie, the end of the sewage main pipe) is still lower than Q, then continue to open the pollution The concentration of the substance is the intercepting pipe corresponding to C3, and so on. When the water switch on the sewage intercepting pipe corresponding to the concentration of the pollutant is opened to the maximum, the flow rate at the end of the system (ie, the end of the sewage main pipe) is exceeded. Q, the concentration of the pollutant is appropriately adjusted to the water switch on the intercepting pipe corresponding to Cm, so that the flow rate at the end of the system (ie, the end of the sewage main pipe) is equal to Q.
The method according to any one of claims 1 to 3, wherein the method further comprises:

3) Set the standard emission value of pollutant concentration C0; when the pollution level of the water body in a certain area reaches the set discharge value C0 of the pollutant concentration, the interception of the area is completed, then the interception pipe of the corresponding area is closed, according to the above method Continue to control the flow of the interception pipe in other areas.

Preferably, the pollutant concentration standard emission value C0 is set in the control unit of the control system according to the environmental capacity of the discharged natural water body and the degree of water pollution in the sheet area.
Method according to any one of claims 1 to 4, characterized in that the end of the sewage main pipe Through the storage system connected to the sewage treatment plant, when the storage system is opened, the maximum flow rate Q that can be actually accepted at the end of the sewage main pipe is Q2; when the storage system is closed, Q is the minimum value of Q1 and Q2.
The method according to any one of claims 1 to 5, wherein the flow rate of the flow channel area of the sewage intercepting pipe of each piece is controlled to control the flow rate of the sewage intercepting pipe of each corresponding piece. The ratio of the flow passage area of the intercepting pipe of the section is used to distribute the flow rate of the intercepting pipes of the respective respective sections, and the sum of the flow rates of the intercepting pipes of the respective sections is equal to Q.

Preferably, the ratio of the flow area of the intercepting pipe of each of the pieces is the same as the ratio of the flow rate of the intercepting pipes of the respective pieces.
The method according to any one of claims 1 to 6, wherein the controlling the flow rate of the intercepting pipe of each corresponding piece according to the ratio of the area of the water receiving area corresponding to each of the pieces refers to each piece The ratio of the area of the corresponding catchment area is used to distribute the flow rate of the intercepting pipes of the corresponding respective sections, and the sum of the flow rates of the intercepting pipes of the respective sections is equal to Q.

Preferably, the ratio of the flow area of the intercepting pipe of each of the pieces is the same as the ratio of the flow rate of the intercepting pipes of the respective pieces.
The method according to any one of claims 1 to 7, wherein the sewage main pipe comprises one or more storage systems along the line, and the storage system may be connected in series or in parallel. The storage and storage facilities include a storage tank, a storage tank culvert, a deep tunnel or a shallow tunnel.

Preferably, the drainage system further includes a water switch disposed on the sewage intercepting pipe of each of the panels.
The method according to any one of claims 1-8, wherein the drainage system further comprises a control system comprising means for monitoring water quality of the water body and a control unit coupled thereto; the control unit The utility model is connected with the water switch signal on the sewage intercepting pipe of each piece; the monitoring device is used for monitoring the water quality of the water body, generating a water quality monitoring signal, and transmitting the generated water quality monitoring signal to the control unit, and the control unit controls each according to the received water quality monitoring signal The opening of the water switch on the intercepting pipe of the zone.

Preferably, the device for monitoring water quality is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH 3 -N monitor, an online TP monitor, and an online TN. a monitor, an electrode, a conductivity meter, etc., wherein the device for monitoring the water quality of the water body can monitor the concentration of the pollutant in the water body, the pollutant including one of TSS, COD, BOD, NH 3 -N, TN or TP or Several.

Preferably, the water quality detector may be configured to detect water quality by using an electrode method, a UV optical method, an optical scattering method, or the like.

Preferably, the water switch on the sewage intercepting pipe of each piece is independently selected from a valve (ball valve, gate valve, knife gate valve, butterfly valve, lift rubber plate shut-off check valve, etc.), gate (upper open gate, lower) One of the open gates, etc., the slamming door (the upper open type of door, the lower open type of door, the rotary type of door, etc.), the flapping door (cutting gate, etc.).

Preferably, the area division may be performed according to an area of 0.04-2 square kilometers.

Preferably, one or more rainwater treatment facilities may be included in the area.

Preferably, the intercepting pipes of the respective sections are connected to a rainwater treatment facility of the section.

Preferably, the rainwater treatment facility is selected from at least one of an adjustment facility, an in-line treatment facility, and a split shaft.
A control system suitable for use in the method of any of claims 1-9, wherein the control system comprises means for monitoring the water quality of the water body and a control unit coupled thereto; the control unit and each of the zones The water switch signal connection on the sewage intercepting pipe is used for monitoring the water quality of the water body, generating a water quality monitoring signal, and transmitting the generated water quality monitoring signal to the control unit, and the control unit controls the interception of each piece according to the received water quality monitoring signal The opening of the water switch on the tube.

Preferably, the device for monitoring water quality is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH 3 -N monitor, an online TP monitor, and an online TN. a monitor, an electrode, a conductivity meter, etc., wherein the device for monitoring the water quality of the water body can monitor the concentration of the pollutant in the water body, the pollutant including one of TSS, COD, BOD, NH 3 -N, TN or TP or Several.

Preferably, the water quality detector may be configured to detect water quality by using an electrode method, a UV optical method, an optical scattering method, or the like.