Sewage plant accident pool and adjusting pool mutual backup system and operation control method

Abstract

The invention discloses a sewage plant accident pool and adjusting pool mutual backup system and an operation control method. The sewage plant accident pool and adjusting pool mutual backup system comprises an accident pool, an adjusting pool and a pipeline switching system arranged between the accident pool and the adjusting pool. The adjusting tank comprises a main adjusting tank and an auxiliary adjusting tank which are separated by a separating wall, the accident tank comprises a main accident tank and an auxiliary accident tank which are separated by a separating wall, and a first one-way pipeline for pumping wastewater in the auxiliary adjusting tank into the main adjusting tank to prepare for accommodating the wastewater in the accident tank; as an independent buffer unit, the auxiliary adjusting pool is separated from the main adjusting pool through the separating wall and the one-way pipeline when receiving wastewater shunted by the accident pool, and the balance of water quality and water quantity in the main adjusting pool cannot be directly interfered. The problem that the environment of the regulating tank is easily impacted by sudden change of indexes such as PH value and COD in the switching process is avoided, the pretreatment function of the regulating main tank is not influenced, and the stability of the sewage treatment flow is maintained.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a mutual backup system of an accident pool and a regulating pool of a sewage plant and a running control method. BACKGROUND

[0002] The accident pool and the regulating pool of a sewage plant are both "buffer devices" of a sewage treatment plant. When the sewage treatment plant is unable to normally treat sewage due to equipment failure, power failure, heavy rain leading to far more inflow than treatment capacity, or sudden situations such as leakage and mixing of toxic substances, the sewage that cannot be normally treated is temporarily stored in the accident pool to avoid the over-standard sewage being directly discharged into rivers, soil and the like, so as to gain time for repairing equipment and restoring the system. The regulating pool is a pretreatment facility in the sewage treatment process, and mainly functions to balance the water quality and water quantity of sewage and temporarily store sewage in the peak period. However, the accident pool is aimed at sudden emergency situations, and the accident pool and the regulating pool jointly guarantee the stability of the sewage treatment system and the environmental protection standard.

[0003] The mutual backup system of the accident pool and the regulating pool can realize mutual replacement of the two under sudden failure or emergency scenarios through pipeline switching and intelligent control, so as to improve the reliability and risk resistance of the system.

[0004] At present, the pipeline switching of the accident pool and the regulating pool is mainly based on pool liquid level control. When the liquid level of the accident pool reaches a preset upper limit, pipeline switching is triggered to make the wastewater in the pool enter the regulating pool. In order to avoid the wastewater environment in the regulating pool being suddenly impacted, such as sudden change of PH value and COD, the switching process needs to be slowly controlled, the environment in the regulating pool is online adjusted, and after stabilization, the flow is adjusted to the set value. If the inflow of the accident pool is large, there is a risk that the water in the accident pool cannot be timely diverted, resulting in overflow. SUMMARY

[0005] The purpose of the application is to provide a mutual backup system of an accident pool and a regulating pool of a sewage plant and a running control method. The main pool and the auxiliary pool are separated from the accident pool and the regulating pool respectively. In normal use, the main pool and the auxiliary pool are used in balance through a normally open magnetic valve. When an accident occurs, the normally open magnetic valve is closed while the wastewater enters the accident pool. The auxiliary regulating pool pumps the water in the pool into the main regulating pool, and the wastewater in the accident pool enters the auxiliary regulating pool, so that the wastewater in the accident pool is shared by the auxiliary regulating pool while the environment in the main regulating pool is not affected, thereby solving the problems in the above background technology.

[0006] To achieve the above purpose, the application adopts the following technical scheme:

[0007] A mutual backup system of an accident pool and a regulating pool of a sewage plant, comprising an accident pool and a regulating pool and a pipeline switching system arranged between the accident pool and the regulating pool;

[0008] The adjusting pool comprises an adjusting main pool and an adjusting auxiliary pool separated by a partition wall, the accident pool comprises an accident main pool and an accident auxiliary pool separated by a partition wall, the pipeline switching system comprises a water inlet pipeline for guiding the wastewater into the accident pool, and a first one-way pipeline for pumping the wastewater in the adjusting auxiliary pool into the adjusting main pool in preparation for containing the wastewater in the accident pool, one end of the first one-way pipeline is communicated with the adjusting main pool, and the other end of the first one-way pipeline is communicated with the adjusting auxiliary pool, the first one-way pipeline is triggered to be conducted when the water in the accident pool reaches a set water level and flow rate.

[0009] Preferably, the pipeline switching system further comprises a second pipeline for guiding the water in the accident pool into the adjusting auxiliary pool, the second pipeline is provided as a two-way communication pipeline, a first water pump and an electric gate valve capable of switching the flow direction of the wastewater are installed on the path of the second pipeline.

[0010] Preferably, the water inlet pipeline comprises a total water inlet pipeline and two groups of split water inlet pipelines communicated with the total water inlet pipeline, the total water inlet pipeline is connected with an external wastewater conveying system, and the two groups of split water inlet pipelines are respectively connected with the accident main pool and the accident auxiliary pool.

[0011] Preferably, the third pipeline is connected between the adjusting main pool and the adjusting auxiliary pool and between the accident main pool and the accident auxiliary pool, and the third pipeline is capable of communicating the adjusting main pool with the adjusting auxiliary pool and the accident main pool with the accident auxiliary pool.

[0012] Preferably, a normally open magnetic valve is arranged on the path of the third pipeline, and an electromagnetic valve and a second water pump are installed on the path of the first one-way pipeline.

[0013] Preferably, the wastewater treatment plant accident pool and adjusting pool mutual backup system further comprises a water level monitoring system capable of monitoring the water level in the accident pool and the adjusting pool in real time, and a control system capable of triggering the pipeline switching after the water level monitoring system monitors that the water level reaches a threshold value, and the pipeline switching system, the water level monitoring system and the control system are electrically connected.

[0014] Preferably, the water level monitoring system comprises ultrasonic liquid level meters, online water quality analyzers and flow meters respectively installed in the adjusting main pool and the adjusting auxiliary pool and the accident main pool and the accident auxiliary pool, a pressure sensor for monitoring the pressure in the first one-way pipeline when the pipeline is switched is installed on the path of the first one-way pipeline, and the ultrasonic liquid level meters, the pressure sensor, the flow meters and the online water quality analyzers are electrically connected with the water level monitoring system.

[0015] Preferably, the control system comprises a human-computer interaction interface, a data acquisition and processing module receiving and processing signals from the ultrasonic liquid level meter and the pressure sensor and performing signal processing, a logic judgment module analyzing and judging real-time data transmitted by the data acquisition and processing module to generate control instructions, and an execution control module driving the execution elements in the pipeline switching system to act according to the instructions generated by the logic judgment module.

[0016] The human-computer interaction interface is electrically connected with the data acquisition and processing module, the logic judgment module and the execution control module.

[0017] Preferably, the control system further comprises a control cabinet operation panel capable of displaying real-time water level, pipeline conduction state and device parameters, wherein the device parameters include pressure sensor data and gate valve opening data.

[0018] Based on the sewage plant accident pool and the adjusting pool mutual backup system described above, the application further provides a running control method of the sewage plant accident pool and the adjusting pool mutual backup system, comprising the following steps:

[0019] S1, during normal operation, external wastewater enters the accident main pool and the accident auxiliary pool through the water inlet pipeline for temporary storage, and the adjusting main pool and the adjusting auxiliary pool normally store sewage during peak period;

[0020] S2, when an accident occurs, the wastewater flow increases suddenly or the water quality is abnormal, the water level of the accident main pool and the accident auxiliary pool rises, the flow rate reaches a set value, the control system triggers the first one-way pipeline conduction, the wastewater in the adjusting auxiliary pool is pumped into the adjusting main pool, and the adjusting auxiliary pool releases space;

[0021] S3, if the water level of the accident pool continues to rise to a threshold value, the control system starts the pipeline switching system to guide the water in the accident pool into the adjusting auxiliary pool to divert the accident pool to avoid overflow;

[0022] S4, after the accident is handled, the remaining wastewater in the accident pool is pumped to the adjusting auxiliary pool through the bidirectional function of the second pipeline, and then enters the adjusting main pool for treatment through the first one-way pipeline.

[0023] Compared with the prior art, the sewage plant accident pool and the adjusting pool mutual backup system and the running control method have the following advantages:

[0024] 1、The adjusting auxiliary pool as an independent buffer unit is separated from the adjusting main pool by the isolation wall and the one-way pipeline when receiving the wastewater diverted from the accident pool, so that the water quality and water quantity balance in the adjusting main pool are not directly interfered, the problem that the adjusting pool environment is easily impacted by sudden changes of PH value, COD and other indicators during switching is avoided, the pretreatment function of the adjusting main pool is ensured to be unaffected, and the stability of the sewage treatment process is maintained.

[0025] 2、The application can immediately trigger the pipeline switching action when the accident pool water level and flow rate reach the set value. The emptying operation of the adjusting pool is synchronized with the shunting of the accident pool, saving the waiting time of traditional slow flow switching. In the emergency scenario with large water inflow, the wastewater shunting can be quickly realized, reducing the risk of overflow of the accident pool. At the same time, the bidirectional design of the second pipeline meets the shunting demand during the accident and can divert the remaining wastewater to the adjusting system after the accident is handled, increasing the operational flexibility of the system.

[0026] 3、During normal operation, the accident main pool and the accident auxiliary pool, and the adjusting main pool and the adjusting auxiliary pool use water equally through normally open magnetic valves, fully utilizing the storage function of each pool, and avoiding resource idleness. In the emergency state, the function switching of the main and auxiliary pools makes the adjusting auxiliary pool temporarily assume the role of accident buffer, improving the risk resistance of the sewage treatment system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 The step block diagram of the mutual backup system operation control method of the application;

[0028] Fig. 2 The system diagram of the mutual backup system of the application.

[0029] In the figure: 1, accident pool; 2, adjusting pool; 3, pipeline switching system;

[0030] 101, accident main pool; 102, accident auxiliary pool; 201, isolation wall; 202, adjusting main pool; 203, adjusting auxiliary pool;

[0031] 301, water inlet pipeline; 302, first one-way pipeline; 303, second pipeline; 304, third pipeline;

[0032] 3011, total water inlet pipe; 3012, divided water inlet pipe;

[0033] 3031, first water pump; 3032, electric gate valve;

[0034] 3041, normally open magnetic valve; 3021, electromagnetic valve; 3022, second water pump. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. The specific embodiments described herein are only used to explain the application, and are not used to limit the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0036] The application provides aFigs. 1-2 The sewage plant accident pool and adjusting pool mutual backup system comprises an accident pool 1, an adjusting pool 2 and a pipeline switching system 3 arranged between the accident pool 1 and the adjusting pool 2;

[0037] The adjusting pool 2 comprises an adjusting main pool 202 and an adjusting auxiliary pool 203 separated by a partition wall 201, and a submersible mixer is arranged in the adjusting main pool 202; the accident pool 1 comprises an accident main pool 101 and an accident auxiliary pool 102 separated by the partition wall 201, and the pool body is poured with C35 anti-seepage concrete, and the inner wall is coated with an epoxy resin anticorrosive coating; physical isolation ensures that pollutants only enter the adjusting auxiliary pool 203 when the accident is shunted, thereby protecting the pretreatment function of the adjusting main pool 202; the pipeline switching system 3 comprises a water inlet pipeline 301 for guiding wastewater into the accident pool 1, and a first one-way pipeline 302 for pumping wastewater in the adjusting auxiliary pool 203 into the adjusting main pool 202 to prepare for containing wastewater in the accident pool 1; when an accident occurs, wastewater enters the accident pool 1 through the water inlet pipeline 301, and the first one-way pipeline 302 guides the water in the adjusting auxiliary pool 203 into the adjusting main pool 202 to prepare for the wastewater entering the adjusting auxiliary pool 203; one end of the first one-way pipeline 302 is in communication with the adjusting main pool 202, and the other end of the first one-way pipeline 302 is in communication with the adjusting auxiliary pool 203, and the first one-way pipeline 302 is triggered to be conducted when the water in the accident pool 1 reaches a set water level and flow rate.

[0038] The pipeline switching system 3 further comprises a second pipeline 303 for guiding water in the accident pool 1 into the adjusting auxiliary pool 203, and the second pipeline 303 is arranged as a bidirectional communication pipeline, and a first water pump 3031 and an electric gate valve 3032 capable of switching the flow direction of wastewater are arranged on the path of the second pipeline 303; through the second pipeline 303, wastewater in the accident pool 1 can enter the adjusting auxiliary pool 203, and wastewater in the adjusting auxiliary pool 203 can enter the accident auxiliary pool 102, thereby realizing the mutual backup function between the accident pool 1 and the adjusting pool 2.

[0039] The water inlet pipeline 301 comprises a total water inlet pipeline 3011 and two groups of split water inlet pipelines 3012 in communication with the total water inlet pipeline 3011; the total water inlet pipeline 3011 is connected to an external wastewater conveying system, and the wastewater conveying system serves as a source of wastewater conveying; the two groups of split water inlet pipelines 3012 are respectively connected to the accident main pool 101 and the accident auxiliary pool 102; in normal use, the accident main pool 101 and the accident auxiliary pool 102 jointly undertake the function of storing wastewater.

[0040] The third pipeline 304 is connected between the adjusting main pool 202 and the adjusting auxiliary pool 203 and between the accident main pool 101 and the accident auxiliary pool 102, and can communicate the adjusting main pool 202 with the adjusting auxiliary pool 203 and communicate the accident main pool 101 with the accident auxiliary pool 102. By arranging the third pipeline 304, the adjusting main pool 202 and the adjusting auxiliary pool 203 store the wastewater together, and the accident main pool 101 and the accident auxiliary pool 102 store the wastewater together.

[0041] The third pipeline 304 is connected between the adjusting main pool 202 and the adjusting auxiliary pool 203 and between the accident main pool 101 and the accident auxiliary pool 102, and can communicate the adjusting main pool 202 with the adjusting auxiliary pool 203 and communicate the accident main pool 101 with the accident auxiliary pool 102. By arranging the third pipeline 304, the adjusting main pool 202 and the adjusting auxiliary pool 203 store the wastewater together, and the accident main pool 101 and the accident auxiliary pool 102 store the wastewater together.

[0042] The sewage plant accident pool 1 and the adjusting pool 2 mutual standby system further comprises a water level monitoring system capable of monitoring the water level in the accident pool 1 and the adjusting pool 2 in real time, and a control system capable of triggering pipeline switching when the water level reaches a threshold value. The pipeline switching system 3, the water level monitoring system and the control system are electrically connected. The data monitored by the water level monitoring system is used as a reference for the control system to control the opening and closing of the valve and the pump body.

[0043] The water level monitoring system comprises ultrasonic level meters respectively installed in the adjusting main pool 202 and the adjusting auxiliary pool 203 and the accident main pool 101 and the accident auxiliary pool 102. The ultrasonic level meters are used to monitor the water level in the accident pool 1 and the adjusting pool 2 in real time. Two sets of water level thresholds are set in the control system. The low water level threshold is used to determine whether the first one-way pipeline 302 needs to be turned on, and the high water level threshold is used to determine whether the second pipeline 303 needs to be turned on. An online water quality analyzer is used to monitor whether toxic substances flow into the accident pool 1, and a flow meter is used to monitor the flow of wastewater when an accident occurs. The flow meter and the ultrasonic level meter are used as reference data for determining whether the pipeline needs to be switched. A pressure sensor is installed on the first one-way pipeline 302 to monitor the pressure in the first one-way pipeline 302 when the pipeline is switched. The ultrasonic level meter, the pressure sensor, the flow meter and the online water quality analyzer are electrically connected to the water level monitoring system.

[0044] The control system comprises a man-machine interface, a data acquisition and processing module receiving and processing signals from the ultrasonic liquid level meter and the pressure sensor and performing signal processing, a logic judgment module analyzing and judging real-time data transmitted by the data acquisition and processing module to generate a control instruction, and an execution control module driving the execution element in the pipeline switching system 3 to act according to the instruction generated by the logic judgment module; the execution element comprises a first water pump 3031, an electric gate valve 3032, a normally open magnetic valve 3041, a second water pump 3022 and a battery valve.

[0045] The reference data of the logic judgment module comprises three groups, one group is water level data monitored by the ultrasonic liquid level meter, one group is flow data of the wastewater when an accident occurs, and the other group is data fed back by the online water quality analyzer.

[0046] When an accident occurs, the pipeline switching system 3 has the following two states: the water level in the accident pool 1 is within the low water level threshold, and the wastewater flow reaches the threshold, then the first one-way pipeline 302 is conducted;

[0047] The online water quality analyzer in the accident pool 1 feeds back that the water quality is toxic, and the wastewater flow reaches the threshold, then the first one-way pipeline 302 is conducted;

[0048] The water level in the accident pool 1 is within the high water level threshold, and the wastewater flow reaches the threshold, then the second pipeline 303 is conducted;

[0049] The man-machine interface is electrically connected with the data acquisition and processing module, the logic judgment module and the execution control module.

[0050] The control system further comprises a control cabinet operation panel capable of displaying real-time water level, pipeline conduction state and device parameters, wherein the device parameters comprise pressure sensor data and gate valve opening data.

[0051] Based on the above-described sewage plant accident pool and regulating pool mutual backup system, the application further provides a sewage plant accident pool 1 and regulating pool 2 mutual backup system operation control method, comprising the following steps:

[0052] S1, during normal operation, external wastewater passes through the total inlet pipe 3011 to the branch inlet pipe 3012, and enters the accident main pool 101 and the accident auxiliary pool 102 for storage, the regulating main pool 202 and the regulating auxiliary pool 203 are connected through the third pipeline 304, the normally open magnetic valve 3041 is opened, and the peak period sewage is stored together; the submersible mixer in the regulating main pool 202 continuously operates;

[0053] The first one-way pipeline 302 is in a closed state, and the electromagnetic valve 3021 is closed. The second pipeline 303 is in a closed state, the electric gate valve 3032 is closed, and the first water pump 3031 is shut down.

[0054] The ultrasonic liquid level meter monitors the water level of each pool in real time, the flow meter monitors the water inflow, and the online water quality analyzer detects the water quality, and the data is fed back to the control system.

[0055] S2, when an accident occurs, the wastewater flow increases suddenly or the water quality is abnormal, such as toxic substances invading, triggering the first one-way pipeline 302 to conduct;

[0056] The triggering condition is that the water level in the accident pool 1 is within the low water level threshold, and the wastewater flow reaches the threshold, and the first one-way pipeline 302 is conducted.

[0057] The online water quality analyzer in the accident pool 1 feeds back that the water quality is toxic, and the wastewater flow reaches the threshold, and the first one-way pipeline 302 is conducted.

[0058] When the first one-way pipeline 302 is conducted, the electromagnetic valve 3021 is opened, the second water pump 3022 is started, the wastewater in the adjusting auxiliary pool 203 is adjusted and pumped into the adjusting main pool 202, the adjusting auxiliary pool 203 is emptied, and at the same time the wastewater continues to enter the accident main pool 101 and the accident auxiliary pool 102 through the water inlet pipeline 301;

[0059] S3, if the water level of the accident pool 1 continues to rise to the high water level threshold, and the wastewater flow reaches the set value, the control system starts the pipeline switching system 3 to guide the water in the accident pool 1 into the adjusting auxiliary pool 203, and shunts the accident pool 1 to avoid overflow, specifically:

[0060] The electric gate valve 3032 is opened, the first water pump 3031 is started to guide the excess wastewater in the accident pool 1 into the empty adjusting auxiliary pool 203 to avoid overflow of the accident pool 1. The normally open magnetic valve 3041 of the third pipeline 304 remains open, the accident main pool 101 and the accident auxiliary pool 102 are drained together, the normally open magnetic valve 3041 of the adjusting main pool 202 and the adjusting auxiliary pool 203 remains closed, and is separated by the physical isolation wall 201 to ensure that the pollutants only enter the adjusting auxiliary pool 203 and protect the pretreatment function of the adjusting main pool 202;

[0061] S4, the external accident wastewater input stops, the water level of the accident pool 1 decreases, the accident treatment is completed, and through the bidirectional function of the second pipeline 303, the direction of the electric gate valve 3032 is switched from the adjusting auxiliary pool 203 to the accident pool 1, and the first water pump 3031 is started to pump the remaining wastewater in the accident pool 1 to the adjusting auxiliary pool 203 for temporary storage;

[0062] The first one-way pipeline 302 starts to pump the wastewater in the adjusting auxiliary pool 203 into the adjusting main pool 202, which is homogenized by the submersible mixer and then enters the subsequent treatment process;

[0063] Close all water pumps and valves, restore the full communication state of the normally open magnetic valve 3041 of the third pipeline 304, empty the accident pool 1, and return the adjusting pool 2 to normal peak sewage regulation function.

[0064] It should be pointed out finally that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some of the technical features, as long as the modifications, equivalent replacements or improvements are within the spirit and principle of the present application, and should be included in the protection scope of the present application.

Claims

1. A sewage plant emergency tank and regulating tank mutual backup system, characterized in that: The system comprises an accident pool (1), a regulating pool (2) and a pipeline switching system (3) arranged between the accident pool (1) and the regulating pool (2); The regulating pool (2) comprises a regulating main pool (202) and a regulating auxiliary pool (203) separated by a partition wall (201), the accident pool (1) comprises an accident main pool (101) and an accident auxiliary pool (102) separated by the partition wall (201), the pipeline switching system (3) comprises a water inlet pipeline (301) for guiding wastewater into the accident pool (1), and a first one-way pipeline (302) for pumping wastewater in the regulating auxiliary pool (203) into the regulating main pool (202) to prepare for containing wastewater in the accident pool (1), one end of the first one-way pipeline (302) is in communication with the regulating main pool (202), the other end of the first one-way pipeline (302) is in communication with the regulating auxiliary pool (203), the first one-way pipeline (302) is triggered to be conducted when the water in the accident pool (1) reaches a set water level and flow rate.

2. A system for mutual backup of an emergency tank and a regulating tank of a sewage treatment plant according to claim 1, characterized in that: The pipeline switching system (3) further comprises a second pipeline (303) for guiding water in the accident pool (1) into the regulating auxiliary pool (203), the second pipeline (303) is arranged as a bidirectional communication pipeline, a first water pump (3031) and an electric gate valve (3032) capable of switching the flow direction of wastewater are installed on the path of the second pipeline (303).

3. A system for mutual backup of an emergency tank and a regulating tank of a sewage treatment plant according to claim 2, characterized in that: The water inlet pipeline (301) comprises a total water inlet pipeline (3011) and two groups of branch water inlet pipelines (3012) in communication with the total water inlet pipeline (3011), the total water inlet pipeline (3011) is connected to an external wastewater conveying system, and the two groups of branch water inlet pipelines (3012) are connected to the accident main pool (101) and the accident auxiliary pool (102) respectively.

4. A system for mutual backup of an emergency tank and a regulating tank of a sewage plant according to claim 3, characterized in that: The third pipeline (304) is arranged on the path of the first one-way pipeline (302) and is in communication with the regulating main pool (202) and the regulating auxiliary pool (203), and is in communication with the accident main pool (101) and the accident auxiliary pool (102).

5. A system for mutual backup of an emergency tank and a regulating tank of a sewage plant according to claim 4, characterized in that: The third pipeline (304) is arranged on the path of the first one-way pipeline (302) and is in communication with the regulating main pool (202) and the regulating auxiliary pool (203), and is in communication with the accident main pool (101) and the accident auxiliary pool (102).

6. A system for mutual backup of an emergency tank and a regulating tank of a sewage plant according to claim 5, characterized in that: The mutual backup system of the accident pool (1) and the regulating pool (2) of the sewage plant further comprises a water level monitoring system capable of monitoring the water level in the accident pool (1) and the regulating pool (2) in real time, and a control system capable of triggering pipeline switching after the water level monitoring system detects that the water level reaches a threshold, the pipeline switching system (3), the water level monitoring system and the control system are electrically connected.

7. A system according to claim 6 wherein: The water level monitoring system comprises ultrasonic liquid level meters, online water quality analyzers and flow meters respectively installed in the adjusting main pool (202) and the adjusting auxiliary pool (203) and the accident main pool (101) and the accident auxiliary pool (102), a pressure sensor for monitoring the pressure in the first one-way pipeline (302) is installed on the path of the first one-way pipeline (302), and the ultrasonic liquid level meter, the pressure sensor, the flow meter and the online water quality analyzer are electrically connected with the water level monitoring system.

8. A system according to claim 7 wherein: The control system comprises a man-machine interface, a data acquisition and processing module for receiving and processing signals from the ultrasonic liquid level meter and the pressure sensor and performing signal processing, a logic judgment module for analyzing and judging real-time data transmitted by the data acquisition and processing module to generate control instructions, and an execution control module for driving the execution elements in the pipeline switching system (3) to act according to the instructions generated by the logic judgment module. The man-machine interface is electrically connected with the data acquisition and processing module, the logic judgment module and the execution control module.

9. A system for mutual backup of an emergency tank and a regulating tank of a sewage plant according to claim 8, characterized in that: The control system further comprises a control cabinet operation panel capable of displaying real-time water level, pipeline conduction state and equipment parameters, wherein the equipment parameters comprise pressure sensor data and gate valve opening data.

10. A method for operating a system according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, during normal operation, external wastewater enters the accident main pool and the accident auxiliary pool through the water inlet pipeline for temporary storage, and the adjusting main pool and the adjusting auxiliary pool normally store sewage in peak period; S2, when an accident occurs, the wastewater flow increases suddenly or the water quality is abnormal, the water level of the accident main pool and the accident auxiliary pool rises, the flow rate reaches a set value, the control system triggers the first one-way pipeline to be conducted, the wastewater in the adjusting auxiliary pool is pumped into the adjusting main pool, and the adjusting auxiliary pool releases space; S3, if the water level of the accident pool continues to rise to a threshold value, the control system starts the pipeline switching system to guide the water in the accident pool into the adjusting auxiliary pool to divert the accident pool to avoid overflow; S4, after the accident is handled, the remaining wastewater in the accident pool is pumped to the adjusting auxiliary pool through the bidirectional function of the second pipeline, and then enters the adjusting main pool for treatment through the first one-way pipeline.

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