Sequential batch storage and drainage-based Anti-sedimentation method and system for sewage pipe network

Abstract

The present invention relates to a sequential batch storage and drainage-based anti-sedimentation method and system for a sewage pipe network. The method comprises: on the basis of unfavorable overflow points and leakage points in an upstream service area of each sewage pumping station, determining a maximum allowable water storage water level and a minimum allowable discharge water level of each sewage pumping station; on the basis of a historical change pattern of the flow rate of each sewage pumping station, determining a corresponding upstream inflow volume increase sudden change point; on the basis of a drainage path of each sewage pumping station and the upstream inflow volume increase sudden change point, determining a sequence in which each sewage pumping station operates in a water storage-drainage mode; on the basis of the drainage path and an operating mode of each sewage pumping station, adjusting the operating modes and pumping flow rates of the remaining sewage pumping stations; and, during operation of each sewage pumping station in the water storage-drainage mode, monitoring liquid level changes thereof in real time, and, on the basis of a liquid level change of each sewage pumping station and the corresponding maximum allowable water storage water level and minimum allowable discharge water level, controlling the operating state of a corresponding lift pump. The present invention can effectively improve the efficiency of pollutant collection and transfer.

Description

A method and system for preventing sedimentation in a sequential batch sewage pipe network Technical Field

[0001] This invention relates to the field of urban drainage and sewage treatment technology, and in particular to a method and system for preventing sedimentation in a sequential batch sewage pipe network. Background Technology

[0002] Existing wastewater systems suffer from low operating efficiency, high energy consumption, and low rates of centralized collection of urban domestic sewage and low BOD (biochemical oxygen demand) concentrations in wastewater treatment plant influent. Many cities face pathological operational challenges such as infiltration of clean water into pipes, sedimentation at low flow rates, and high-level overflows during the dry season, which severely restrict the normal functioning of wastewater collection and treatment systems and hinder the improvement of their overall efficiency.

[0003] Based on the practical need to improve the efficiency of wastewater collection and treatment, the implementation of wastewater pipeline network joint scheduling technology strategies to regulate key parameters such as wastewater pipeline operating levels and flow rates is an effective means to improve the efficiency of pollutant collection and transfer. Domestic and international researchers have conducted considerable research on the optimized scheduling of wastewater pipeline networks, but many technical challenges remain in practical applications. On the one hand, sewage pumping stations are generally located at the end of the area collection system. Due to their low-lying terrain and deep burial, the inlet pipes are affected by multiple factors such as high surface water and groundwater levels, making it difficult to achieve a low-level, high-flow-rate operation through a simple high-flow-rate pumping mode. This could even exacerbate the risk of clean water intruding into the sewage system. On the other hand, most existing scheduling schemes adopt a fixed mode, with the main requirement for scheduling sewage pumping stations being saving electricity costs. They do not consider the control of low-flow-rate sedimentation problems in the sewage pipe network, making it difficult to achieve the dual goals of improving pollutant collection efficiency and saving pumping station energy consumption. In addition, traditional scheduling methods usually use a rough time-segmentation approach to control pumping station operation, failing to fully utilize the dynamic changes in actual sewage flow and the coordination relationships between various pumping station systems. The complex sewage pipe network system lacks flexible and precise scheduling strategies to cope with diverse operational needs and sudden changes.

[0004] In summary, the existing sewage pumping station scheduling model has significant shortcomings in terms of targeting, accuracy, and dynamic adaptability, which not only restricts the operating efficiency of the sewage system but also increases the risks of system operation and maintenance management. Summary of the Invention

[0005] To address this, the present invention provides a method and system for preventing sedimentation in sewage pipe networks using a sequential batch storage and discharge system. By combining the sewage discharge patterns, the invention innovatively couples the high-flow discharge periods of sewage pumping stations with the peak sewage discharge periods, and adopts a sequential batch storage and discharge alternating operation mode. This achieves a sedimentation prevention and control strategy under the coordinated operation of multiple sewage pumping stations, which can effectively improve the efficiency of sewage collection and transfer while solving the system operation problem under the high risk of external water intrusion. This provides an efficient and practical technical solution for the drainage industry.

[0006] To solve the above-mentioned technical problems, the present invention provides a method for preventing sedimentation in a sequencing batch storage and discharge (SBS) wastewater pipe network, comprising:

[0007] Based on the unfavorable overflow and leakage points within the upstream service range of each sewage pumping station, the maximum allowable water storage level and the minimum allowable water discharge level of each sewage pumping station are determined. Among them, multiple sewage pumping stations are connected to the sewage treatment system through sewage pipelines in series / parallel, and each sewage pumping station is equipped with multiple lift pumps.

[0008] Based on the historical variation patterns of the flow rate of each sewage pumping station, the corresponding abrupt change point of upstream influent growth is determined. The abrupt change point of upstream influent growth is the period when the ratio of the hourly flow rate to the daily average flow rate is at its maximum.

[0009] Based on the drainage path of each sewage pumping station and the abrupt change point in the upstream inflow, the order in which each sewage pumping station operates in the water storage-drainage mode is determined.

[0010] Based on the drainage path and operating mode of each sewage pumping station, adjust the operating mode and pumping flow rate of the remaining sewage pumping stations.

[0011] When each of the sewage pumping stations is in storage-discharge mode, its liquid level changes are monitored in real time. Based on the liquid level changes of each sewage pumping station, as well as the corresponding maximum allowable storage water level and the corresponding minimum allowable discharge water level, the operating status of the corresponding booster pump is controlled.

[0012] In one embodiment of the present invention, the corresponding upstream inflow abrupt change point is determined based on the historical flow variation pattern of each sewage pumping station, including:

[0013] Daily variation data should be collected from at least 30 consecutive days of drought with time intervals not exceeding 5 minutes, and these data should be used as historical monitoring data.

[0014] In one embodiment of the present invention, the order in which each of the sewage pumping stations operates in water storage-discharge mode is determined based on the drainage path of each sewage pumping station and the abrupt increase point of the upstream inflow, including:

[0015] When multiple sewage pumping stations belong to different drainage paths and the time range of the sudden increase in upstream water discharge overlaps, they are planned to carry out water storage-drainage mode in different batches.

[0016] When multiple sewage pumping stations belong to the same drainage path, they are planned to operate in a water storage-drainage mode in adjacent time periods, and are operated in the order of upstream first and downstream. The drainage period of the sewage pumping station located upstream is taken as the water storage period of the sewage pumping station located downstream.

[0017] In one embodiment of the present invention, it further includes:

[0018] The total flow rate of each of the aforementioned sewage pumping stations is less than or equal to the treatment capacity of the sewage treatment system.

[0019] When a sewage pumping station exceeds the treatment capacity of the sewage treatment system during the water storage-drainage mode, the pumping flow rate of other sewage pumping stations along the drainage path is reduced first. If the requirements are still not met, the maximum pumping flow rate of the sewage pumping station is reduced.

[0020] In one embodiment of the present invention, adjusting the operating mode and pumping flow rate of the remaining sewage pumping stations according to the drainage path and operating mode of each of the sewage pumping stations includes:

[0021] When multiple sewage pumping stations belong to different drainage paths, during the period when a sewage pumping station on a certain drainage path is in water storage mode, the sewage pumping stations on other drainage paths increase the pumping flow rate of the corresponding booster pumps. During the period when a sewage pumping station on a certain drainage path is in drainage mode, the sewage pumping stations on other drainage paths decrease the pumping flow rate of the corresponding booster pumps.

[0022] In one embodiment of the present invention, it further includes:

[0023] When multiple sewage pumping stations belong to the same drainage path, the maximum allowable water storage level of the drainage path during the water storage-drainage mode is determined jointly by the sewage pumping station located upstream and the sewage pumping station located downstream.

[0024] In one embodiment of the present invention, controlling the operating state of the corresponding booster pump based on the liquid level change of the sewage pumping station, and the corresponding maximum allowable water storage level and minimum allowable discharge level, includes:

[0025] When a sewage pumping station enters the water storage-drainage mode, it will activate the water storage mode at the moment of sudden change in the amount of water discharged, and gradually shut down the running booster pumps of the corresponding sewage pumping station.

[0026] When the liquid level of the sewage pumping station reaches the maximum allowable water storage level, the drainage mode is activated, and all the lift pumps allowed to be used by the corresponding sewage pumping station are turned on.

[0027] In response to the sewage pumping station's liquid level dropping to the minimum allowable discharge level, the corresponding booster pumps of the sewage pumping station are gradually shut down until they return to normal operation.

[0028] In one embodiment of the present invention, it further includes:

[0029] Based on the overflow situation and pumping flow changes of the upstream sewage pipes during the water storage-discharge mode of each sewage pumping station, adjustments are made to the maximum allowable water storage level and minimum allowable discharge level of the corresponding sewage pumping station. Based on the upstream drainage patterns and actual maximum allowable flow of each sewage pumping station, adjustments are made to the point of sudden increase in discharge volume and the number of booster pumps activated, including:

[0030] Based on the overflow situation and pumping flow changes of the upstream sewage pipes during the water storage-discharge mode of each sewage pumping station, adjustments are made to the maximum allowable water storage level and minimum allowable discharge level of the corresponding sewage pumping station. Based on the upstream drainage patterns and actual maximum allowable flow of each sewage pumping station, adjustments are made to the point of sudden increase in discharge volume and the number of booster pumps activated, including:

[0031] When an overflow point occurs in the upstream sewage pipeline of the sewage pumping station during the water storage mode, the maximum allowable water storage level of the corresponding sewage pumping station shall be reduced.

[0032] When the sewage pumping station does not show a decreasing trend in pumping flow during the drainage mode, the minimum allowable discharge water level of the corresponding sewage pumping station shall be increased.

[0033] When the upstream drainage pattern of the sewage pumping station changes, the point of sudden change in the discharge volume is corrected;

[0034] When the actual maximum allowable flow rate of the downstream pipeline of the sewage pumping station cannot meet the maximum pumping flow rate of the water storage-drainage mode, reduce the number of booster pumps that are turned on.

[0035] In one embodiment of the present invention, the method further includes: the water storage-drainage mode of each of the sewage pumping stations is operated during dry weather; if rainfall occurs, the water storage-drainage mode of all sewage pumping stations is suspended, including:

[0036] Under rainfall conditions, each of the aforementioned sewage pumping stations will discharge water in either conventional mode or switched to rainfall mode.

[0037] Forty-eight hours after the rainfall ends, each of the aforementioned sewage pumping stations will operate in a water storage-drainage mode according to the predetermined sequence and pattern.

[0038] This invention also provides a sequential batch sewage network anti-deposition system, comprising: a sewage treatment system, a control platform, and several sewage pumping stations. Each sewage pumping station is equipped with a flow meter, a level gauge, and a booster pump. The multiple sewage pumping stations are connected to the sewage treatment system via sewage pipelines in series / parallel. The flow meter, level gauge, and booster pump of each sewage pumping station are communicatively connected to the control platform. The control platform includes:

[0039] The module for determining the maximum allowable water storage level and the minimum allowable water discharge level is used to determine the maximum allowable water storage level and the minimum allowable water discharge level of each sewage pumping station based on the unfavorable overflow points and leakage points within the upstream service range of each sewage pumping station.

[0040] The upstream influent growth mutation point determination module is used to determine the corresponding upstream influent growth mutation point based on the historical change pattern of the flow rate of each sewage pumping station. The upstream influent growth mutation point is the period when the ratio of the hourly flow rate to the daily average flow rate is at its maximum.

[0041] The water storage-drainage mode sequence determination module is used to determine the order of water storage-drainage modes for each of the sewage pumping stations based on the drainage path of each sewage pumping station and the sudden change point of the upstream inflow volume.

[0042] The operation mode and pumping flow rate adjustment module is used to adjust the operation mode and pumping flow rate of the remaining sewage pumping stations according to the drainage path and operation mode of each sewage pumping station.

[0043] The booster pump operation status control module is used to monitor the liquid level changes of each sewage pumping station in real time when the station is in storage-discharge mode during dry weather, and to control the operation status of the corresponding booster pump based on the liquid level changes of each sewage pumping station, as well as the corresponding maximum allowable storage water level and the minimum allowable discharge water level.

[0044] The dynamic adjustment module is used to adjust, based on the overflow situation and pumping flow changes of the upstream sewage pipes during the water storage-drainage mode of each sewage pumping station, including the maximum allowable water storage level and the minimum allowable discharge level of the corresponding sewage pumping station, and the point of sudden change in the discharge volume and the number of booster pumps activated based on the upstream drainage pattern and the actual maximum allowable flow of each sewage pumping station.

[0045] The technical solution of the present invention has the following advantages over the prior art:

[0046] The present invention discloses a method and system for preventing sedimentation in a sequential batch storage and discharge sewage network. By optimizing the pump station operation mode in combination with the sewage discharge pattern, and by accurately dividing the water storage and flushing periods, the flow rate of the sewage pipeline is increased in stages to prevent the problem of low-velocity sedimentation of pollutants during sewage transfer. This can effectively improve the pollutant collection efficiency, reduce the risk of pipeline overflow, and enhance the stability and operational reliability of the system.

[0047] This invention enables pumping stations to operate at reasonable liquid levels and high flow rates under high risk of external water intrusion through a dynamic control method of sequential water storage and flushing. This avoids the problem of external water intrusion caused by simply relying on large-flow pumping, while reducing the energy consumption of pumping station equipment and extending the service life of facilities.

[0048] This invention targets complex sewage pipe network systems and employs a flexible scheduling strategy to achieve coordinated operation of multiple pumping stations, effectively balancing the load of sewage treatment plants, avoiding overload during peak periods or waste during off-peak periods, improving the overall efficiency and adaptability of the entire sewage treatment system, effectively controlling the problem of pollutant deposition in sewage pipe networks, and improving the efficiency of pollutant collection and transfer. Attached Figure Description

[0049] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0050] Figure 1 is a flowchart of a sequential batch storage and discharge sewage network anti-deposition method according to the present invention.

[0051] Figure 2 is a schematic diagram of the structure of a sequential batch storage and discharge sewage network anti-deposition system according to the present invention. Detailed Implementation

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0053] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0054] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0055] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution. Example

[0056] Referring to Figure 1, a method for preventing sedimentation in a sequential batch sewage network according to the present invention includes:

[0057] S1. Determine the maximum allowable water storage level (L) for each sewage pumping station based on the unfavorable overflow and leakage points within the upstream service area of ​​each sewage pumping station. 高 ) and minimum allowable discharge level (L 低 In this system, multiple sewage pumping stations are connected to a sewage treatment system (sewage treatment plant) via sewage pipelines in series or in parallel, and each sewage pumping station is equipped with multiple booster pumps.

[0058] Understandably, an unfavorable overflow point refers to a location or node in the pipe network where, if the upstream or downstream water levels are too high, there is a risk of overflowing into the environment or onto the surface. A leakage point refers to a weak point in the sewage system where it is susceptible to intrusion from external water (surface water, groundwater, rainwater, etc.) or where sewage leaks outwards. The minimum permissible discharge level (L) 低 This refers to the lowest water level threshold to which the sewage pumping station's water level will drop. Once this water level is reached or lowered, the current centralized drainage process will end and the station will switch to normal operation.

[0059] S2. Based on the historical variation pattern of the flow rate of each sewage pumping station, determine the corresponding upstream inflow abrupt change point (T). The upstream inflow abrupt change point is the period when the ratio of the hourly flow rate to the daily average flow rate is at its maximum.

[0060] For example, daily variation data of at least 30 consecutive days of drought with an interval of no more than 5 minutes are collected as historical monitoring data.

[0061] S3. Based on the drainage path of each sewage pumping station and the sudden change point of the upstream inflow, determine the order in which each sewage pumping station performs water storage-drainage mode.

[0062] It is understandable that each sewage pumping station periodically starts the water storage-drainage operation mode according to a predetermined sequence, and operates in the conventional mode at other times, provided that the transfer capacity of upstream and downstream sewage pumping stations and the treatment capacity of sewage treatment plants are ensured.

[0063] Specifically, when multiple sewage pumping stations belong to different drainage paths and the time range of the sudden increase in upstream water discharge overlaps, they are planned to carry out water storage-drainage mode in different batches.

[0064] When multiple sewage pumping stations belong to the same drainage path, they are planned to operate in a water storage-drainage mode in adjacent time periods, and are operated in the order of upstream first and downstream. The drainage period of the sewage pumping station located upstream is taken as the water storage period of the sewage pumping station located downstream.

[0065] It should be noted that when multiple sewage pumping stations operate along different drainage paths, the sewage from each station ultimately flows into the same sewage treatment system. If they simultaneously operate in storage-discharge mode, it can easily lead to a large volume of discharge at the same time, resulting in an excessive instantaneous total discharge flow that exceeds the sewage treatment plant's capacity. Therefore, it is planned that they operate in storage-discharge mode in different batches to avoid overlapping periods of high-flow discharge. Some pumping stations store water first and then discharge, while others discharge at delayed or staggered times, reducing peak loads and allowing for phased flushing within the pipe network to prevent sedimentation.

[0066] When multiple sewage pumping stations share the same drainage path, there is a series connection between upstream and downstream. If both upstream and downstream pumping stations discharge large volumes of water simultaneously, it may cause a cumulative overload in the downstream pipeline and make it difficult to control sedimentation in the upstream section. Therefore, the upstream sewage pumping stations should first discharge water to flush the pipeline, while the downstream sewage pumping stations temporarily store water during this period to make room for the flushing water flow from the upstream. After the upstream discharge is complete, the downstream sewage pumping stations will then discharge water. This sequential discharge from upstream and downstream creates a continuous high flow velocity along the entire pipeline, resulting in higher efficiency and avoiding localized overload.

[0067] Furthermore, the total flow rate of each of the aforementioned sewage pumping stations needs to be less than or equal to the treatment capacity (Q) of the sewage treatment system. A Therefore, when a sewage pumping station exceeds the treatment capacity of the sewage treatment system during its storage-discharge mode, the pumping flow rate of other sewage pumping stations along the drainage path is preferentially reduced. If this still cannot meet the requirements, the maximum pumping flow rate (Q) of that sewage pumping station is then reduced. max ).

[0068] S4. Based on the drainage path and operating mode of each sewage pumping station, adjust the operating mode and pumping flow rate of the remaining sewage pumping stations.

[0069] Understandably, based on the transfer capacity of upstream and downstream sewage pumping stations and the treatment capacity of sewage treatment plants, the operating mode and pumping flow rate of a certain sewage pumping station during the water storage-discharge period can be calculated.

[0070] Specifically, when multiple sewage pumping stations belong to different drainage paths, during the period when a sewage pumping station on a certain drainage path is in water storage mode, the sewage pumping stations on other drainage paths increase the pumping flow rate of their corresponding booster pumps; during the period when a sewage pumping station on a certain drainage path is in drainage mode, the sewage pumping stations on other drainage paths decrease the pumping flow rate of their corresponding booster pumps.

[0071] For example, when pump station C on route one is in the water storage stage, pump station D on route two can appropriately increase the number of booster pumps to pump out more sewage and reduce accumulation; when pump station C enters the drainage mode, in order to prevent the total drainage volume from being too large, pump station D reduces the pumping flow and discharges at off-peak times.

[0072] When multiple sewage pumping stations belong to the same drainage path, the maximum allowable water level during the storage-drainage mode is determined jointly by the upstream and downstream sewage pumping stations. Because the pumping stations on the same path are connected in series, if the upstream pumping station sets its water level too high while the downstream pumping station's storage or drainage capacity is insufficient, it may cause flooding or overflow of the upstream or intermediate pipelines. The upstream and downstream pumping stations jointly determine the maximum water level during the storage-drainage mode, ensuring sufficient flushing effect while preventing excessively high levels that could lead to overflow; and ensuring that the downstream can promptly receive the corresponding flow when the upstream discharges a large volume of water.

[0073] S5. When each of the sewage pumping stations is in water storage-drainage mode, its liquid level change is monitored in real time. Based on the liquid level change of each of the sewage pumping stations, as well as the corresponding maximum allowable water storage level and the corresponding minimum allowable water discharge level, the operating status of the corresponding booster pump is controlled.

[0074] It should be noted that within the service area of ​​a sewage pumping station operating in the water storage-drainage mode, there should be no rainfall events exceeding 5mm for 48 consecutive hours to avoid the impact of rainfall on drainage patterns and unfavorable leakage points.

[0075] Therefore, the water storage-drainage mode of each of the aforementioned sewage pumping stations is operated only during dry weather. In the event of rainfall, the water storage-drainage mode of all sewage pumping stations will be suspended, including:

[0076] Under rainfall conditions, each of the aforementioned sewage pumping stations will discharge water in either the conventional mode or by switching to the rainfall mode. The conventional mode refers to the standard operating mode of the sewage pumping station under dry weather conditions with no rainfall or very little rainfall. The rainfall mode refers to the emergency operating mode of the sewage pumping station under conditions of rainfall or heavy rainfall.

[0077] Forty-eight hours after the rainfall ends, each of the aforementioned sewage pumping stations will operate in a water storage-drainage mode according to the predetermined sequence and pattern.

[0078] Specifically, when a sewage pumping station enters the water storage-drainage mode, it will activate the water storage mode at the moment of sudden increase in the discharge volume, and gradually shut down the corresponding sewage pumping station's operating booster pumps. When the sewage pumping station is operating normally, there may be one or more booster pumps in the open state. In order to avoid sudden rise or impact of water level caused by shutting down all pumps at once, it is necessary to shut them down gradually.

[0079] When the sewage pumping station reaches the maximum allowable water level, the drainage mode is activated, and all the lift pumps allowed to be used by the corresponding sewage pumping station are turned on; this can quickly discharge the accumulated sewage.

[0080] In response to the sewage pumping station's liquid level dropping to the minimum allowable discharge level, the corresponding booster pumps of the sewage pumping station are gradually shut down until they return to normal operation.

[0081] S6. Based on the overflow situation of the upstream sewage pipe and the change in pumping flow during the water storage-drainage mode of each sewage pumping station, adjust the maximum allowable water storage level and the minimum allowable discharge level of the corresponding sewage pumping station, and adjust the point of sudden change in discharge volume and the number of pumps to be turned on according to the upstream drainage pattern and the actual maximum allowable flow of each sewage pumping station.

[0082] Specifically, when an overflow point occurs in the upstream sewage pipe of the sewage pumping station during the water storage mode, the maximum allowable water storage level of the corresponding sewage pumping station is reduced.

[0083] When the sewage pumping station does not show a decreasing trend in pumping flow during the drainage mode, the minimum allowable discharge water level of the corresponding sewage pumping station shall be increased.

[0084] It should be noted that if overflow occurs in the upstream pipeline or the liquid level approaches the danger level during the sewage pumping station's water storage period, it indicates that the originally set L... 高 Too high, reduce L 高 If the water level is too high, additional booster pumps should be activated to quickly lower the water level and prevent further overflow. During drainage mode, if the sewage pumping station maintains a high flow rate but the pumping flow rate does not show a decreasing trend, and the original L is maintained... 低 This could further lead to the infiltration of external water such as surface water and groundwater into the sewage pipe network. Under the premise of ensuring safety, the L level can be appropriately increased. 低Alternatively, an additional booster pump can be added to reduce the pumping flow rate.

[0085] In addition, when the upstream drainage pattern of the pumping station (i.e., the historical monitoring data of 30 days in dry weather) changes, it indicates that there is an error or a change in the abrupt change point (T) of the upstream water discharge, which needs to be corrected (by advancing or delaying the T period as needed).

[0086] When the actual maximum allowable flow rate of the downstream pipeline of the sewage pumping station cannot meet the maximum pumping flow rate of the water storage-drainage mode, the number of booster pumps activated should be reduced. It should be noted that the actual maximum allowable flow rate of the downstream pipeline of the sewage pumping station should be based on the theoretical allowable discharge flow rate, further considering factors such as pipeline aging and the safety factor for discharge flow rate to verify the actual flow rate and ensure the total pumping flow rate N·Q. 泵 ≤Q 管道 . Example

[0087] A certain service area includes: sewage pumping stations C, D, E, and F, which enter the sewage treatment plant (A) through three discharge paths. C and D are on the same discharge path, while E and F are on separate discharge paths. Based on overflow points, leakage points, and historical change data, the time periods of abrupt changes in the control water level and discharge volume of the pumping stations are determined as shown in the table below.

[0088] Table 1: Periods of Abrupt Increases in Pump Station Control Water Level and Inflow Rate

[0089]

[0090] Further determine the operating cycle and sequence of the water storage-drainage mode for each pumping station:

[0091] 1. During the operation of pumping stations C and D, the flow control modes of each pumping station are shown in the table below.

[0092] Table 2: Pumping Flow Control Modes for Pump Stations C and D During Operation

[0093]

[0094] 2. During the operation of Pump Station E, the pumping flow control modes of each pump station are shown in the table below.

[0095] Table 3: Pumping Flow Control Modes of Pump Station E During Operation

[0096]

[0097] 3. During the operation of pump station F, the pumping flow control mode of each pump station is shown in the table below.

[0098] Table 4: Pumping Flow Control Modes of Pump Stations During Operation of Pump Station F

[0099]

[0100] Example 3

[0101] Based on the same inventive concept, this embodiment provides a batch storage and discharge sewage network anti-deposition system. Its problem-solving principle is similar to that of the batch storage and discharge sewage network anti-deposition method, and the repeated parts will not be described again.

[0102] Referring to Figure 2, this embodiment provides a sequence batch sewage network anti-deposition system, including:

[0103] The system comprises a wastewater treatment system (A), a control platform (B) (including a communication module, a data processing module, and a control module), and several wastewater pumping stations (C, D...Z). Each of the wastewater pumping stations is equipped with a flow meter, a level gauge, and a booster pump. The multiple wastewater pumping stations are connected to the wastewater treatment system via series / parallel wastewater pipelines. The flow meters, level gauges, and booster pumps of the wastewater treatment system and the wastewater pumping stations are communicatively connected to the control platform. The control platform includes:

[0104] The module for determining the maximum allowable water storage level and the minimum allowable water discharge level is used to determine the maximum allowable water storage level and the minimum allowable water discharge level of each sewage pumping station based on the unfavorable overflow points and leakage points within the upstream service range of each sewage pumping station.

[0105] The upstream influent growth mutation point determination module is used to determine the corresponding upstream influent growth mutation point based on the historical change pattern of the flow rate of each sewage pumping station. The upstream influent growth mutation point is the period when the ratio of the hourly flow rate to the daily average flow rate is at its maximum.

[0106] The water storage-drainage mode sequence determination module is used to determine the order of water storage-drainage modes for each of the sewage pumping stations based on the drainage path of each sewage pumping station and the sudden change point of the upstream inflow volume.

[0107] The operation mode and pumping flow rate adjustment module is used to adjust the operation mode and pumping flow rate of the remaining sewage pumping stations according to the drainage path and operation mode of each sewage pumping station.

[0108] The booster pump operation status control module is used to monitor the liquid level changes of each sewage pumping station in real time when the station is in storage-discharge mode during dry weather, and to control the operation status of the corresponding booster pump based on the liquid level changes of each sewage pumping station, as well as the corresponding maximum allowable storage water level and the minimum allowable discharge water level.

[0109] The dynamic adjustment module is used to adjust the maximum allowable water storage level and the minimum allowable discharge level of the corresponding sewage pumping station based on the overflow situation and pumping flow changes of the upstream sewage pipeline during the water storage-discharge mode of each sewage pumping station. It also adjusts the point of sudden change in the discharge volume and the number of booster pumps to be turned on based on the upstream drainage pattern and the actual maximum allowable flow of each sewage pumping station.

[0110] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0111] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0112] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0113] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0114] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for preventing sedimentation in a sequential batch sewage pipe network, characterized in that, include: Based on the unfavorable overflow and leakage points within the upstream service range of each sewage pumping station, the maximum allowable water storage level and the minimum allowable water discharge level of each sewage pumping station are determined. Among them, multiple sewage pumping stations are connected to the sewage treatment system through sewage pipelines in series / parallel, and each sewage pumping station is equipped with multiple lift pumps. Based on the historical variation patterns of the flow rate of each sewage pumping station, the corresponding abrupt change point of upstream influent growth is determined. The abrupt change point of upstream influent growth is the period when the ratio of the hourly flow rate to the daily average flow rate is at its maximum. Based on the drainage path of each sewage pumping station and the abrupt change point in the upstream inflow, the order in which each sewage pumping station operates in the water storage-drainage mode is determined. Based on the drainage path and operating mode of each sewage pumping station, adjust the operating mode and pumping flow rate of the remaining sewage pumping stations. When each of the sewage pumping stations is in storage-discharge mode, its liquid level changes are monitored in real time. Based on the liquid level changes of each sewage pumping station, as well as the corresponding maximum allowable storage water level and the corresponding minimum allowable discharge water level, the operating status of the corresponding booster pump is controlled.

2. The method for preventing sedimentation in a sequential batch sewage network according to claim 1, characterized in that, Based on the historical flow variation patterns of each sewage pumping station, the corresponding abrupt changes in upstream influent volume were identified, including: Daily variation data should be collected from at least 30 consecutive days of drought with time intervals not exceeding 5 minutes, and these data should be used as historical monitoring data.

3. The method for preventing sedimentation in a sequential batch sewage pipe network according to claim 1, characterized in that, Based on the drainage paths of each sewage pumping station and the abrupt increase in upstream inflow, the order in which each sewage pumping station operates in storage-drainage mode is determined, including: When multiple sewage pumping stations belong to different drainage paths and the time range of the sudden increase in upstream water discharge overlaps, they are planned to carry out water storage-drainage mode in different batches. When multiple sewage pumping stations belong to the same drainage path, they are planned to operate in a water storage-drainage mode in adjacent time periods, and are operated in the order of upstream first and downstream. The drainage period of the sewage pumping station located upstream is taken as the water storage period of the sewage pumping station located downstream.

4. The method for preventing sedimentation in a sequential batch sewage network according to claim 1, characterized in that, Also includes: The total flow rate of each of the aforementioned sewage pumping stations is less than or equal to the treatment capacity of the sewage treatment system. When a sewage pumping station exceeds the treatment capacity of the sewage treatment system during the water storage-drainage mode, the pumping flow rate of other sewage pumping stations along the drainage path is reduced first. If the requirements are still not met, the maximum pumping flow rate of the sewage pumping station is reduced.

5. A method for preventing sedimentation in a sequential batch sewage network according to claim 1, characterized in that, Based on the drainage path and operating mode of each of the aforementioned sewage pumping stations, adjust the operating mode and pumping flow rate of the remaining sewage pumping stations, including: When multiple sewage pumping stations belong to different drainage paths, during the period when a sewage pumping station on a certain drainage path is in water storage mode, the sewage pumping stations on other drainage paths increase the pumping flow rate of the corresponding booster pumps. During the period when a sewage pumping station on a certain drainage path is in drainage mode, the sewage pumping stations on other drainage paths decrease the pumping flow rate of the corresponding booster pumps.

6. A method for preventing sedimentation in a sequential batch sewage network according to claim 5, characterized in that, Also includes: When multiple sewage pumping stations belong to the same drainage path, the maximum allowable water storage level of the drainage path during the water storage-drainage mode is determined jointly by the sewage pumping station located upstream and the sewage pumping station located downstream.

7. A method for preventing sedimentation in a sequential batch sewage pipe network according to claim 1, characterized in that, Based on the changes in the liquid level of the sewage pumping station, and the corresponding maximum allowable water storage level and minimum allowable discharge level, the operating status of the corresponding booster pump is controlled, including: When a sewage pumping station enters the water storage-drainage mode, it will activate the water storage mode at the moment of sudden change in the amount of water discharged, and gradually shut down the running booster pumps of the corresponding sewage pumping station. When the liquid level of the sewage pumping station reaches the maximum allowable water storage level, the drainage mode is activated, and all the lift pumps allowed to be used by the corresponding sewage pumping station are turned on. In response to the sewage pumping station's liquid level dropping to the minimum allowable discharge level, the corresponding booster pumps of the sewage pumping station are gradually shut down until they return to normal operation.

8. A method for preventing sedimentation in a sequential batch sewage network according to claim 1, characterized in that, Also includes: Based on the overflow situation and pumping flow changes of the upstream sewage pipes during the water storage-discharge mode of each sewage pumping station, adjustments are made to the maximum allowable water storage level and minimum allowable discharge level of the corresponding sewage pumping station. Based on the upstream drainage patterns and actual maximum allowable flow of each sewage pumping station, adjustments are made to the point of sudden increase in discharge volume and the number of booster pumps activated, including: When an overflow point occurs in the upstream sewage pipeline of the sewage pumping station during the water storage mode, the maximum allowable water storage level of the corresponding sewage pumping station shall be reduced. When the sewage pumping flow rate of the sewage pumping station does not show a downward trend during the drainage mode, the minimum allowable discharge water level of the corresponding sewage pumping station shall be increased. When the upstream drainage pattern of the sewage pumping station changes, the point of sudden change in the discharge volume is corrected; When the actual maximum allowable flow rate of the downstream pipeline of the sewage pumping station cannot meet the maximum pumping flow rate of the water storage-drainage mode, reduce the number of booster pumps that are turned on.

9. A method for preventing sedimentation in a sequential batch sewage pipe network according to claim 1, characterized in that, Also includes: The water storage-drainage mode of all the aforementioned sewage pumping stations is operated during dry weather. In the event of rainfall, the water storage-drainage operation mode of all sewage pumping stations will be suspended, including: Under rainfall conditions, each of the aforementioned sewage pumping stations will discharge water in either conventional mode or switched to rainfall mode. Forty-eight hours after the rainfall ends, each of the aforementioned sewage pumping stations will operate in a water storage-drainage mode according to the predetermined sequence and pattern.

10. A sequence batch sewage storage and discharge system for preventing sedimentation in a wastewater pipe network, characterized in that, include: The system comprises a wastewater treatment system, a control platform, and several wastewater pumping stations. Each pumping station is equipped with a flow meter, a level gauge, and a booster pump. The multiple pumping stations are connected to the wastewater treatment system via series / parallel wastewater pipelines. The flow meters, level gauges, and booster pumps of the wastewater treatment system and the pumping stations are communicatively connected to the control platform. The control platform includes: The module for determining the maximum allowable water storage level and the minimum allowable water discharge level is used to determine the maximum allowable water storage level and the minimum allowable water discharge level of each sewage pumping station based on the unfavorable overflow points and leakage points within the upstream service range of each sewage pumping station. The upstream influent growth mutation point determination module is used to determine the corresponding upstream influent growth mutation point based on the historical change pattern of the flow rate of each sewage pumping station. The upstream influent growth mutation point is the period when the ratio of the hourly flow rate to the daily average flow rate is at its maximum. The water storage-drainage mode sequence determination module is used to determine the order of water storage-drainage modes for each of the sewage pumping stations based on the drainage path of each sewage pumping station and the sudden change point of the upstream inflow volume. The operation mode and pumping flow rate adjustment module is used to adjust the operation mode and pumping flow rate of the remaining sewage pumping stations according to the drainage path and operation mode of each sewage pumping station. The booster pump operation status control module is used to monitor the liquid level changes of each sewage pumping station in real time when the sewage pumping station is in storage-discharge mode, and control the operation status of the corresponding booster pump according to the liquid level changes of each sewage pumping station, as well as the corresponding maximum allowable storage water level and the corresponding minimum allowable discharge water level. The dynamic adjustment module is used to adjust the maximum allowable water storage level and the minimum allowable discharge level of the corresponding sewage pumping station based on the overflow situation and pumping flow changes of the upstream sewage pipeline during the water storage-discharge mode of each sewage pumping station. It also adjusts the point of sudden change in the discharge volume and the number of booster pumps to be turned on based on the upstream drainage pattern and the actual maximum allowable flow of each sewage pumping station.

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