Anti-flooding system and method

Abstract

The present invention provides an anti-flooding system and method, including: a pre-treatment structure, a water treatment structure and a terminal lifting structure, when the sewage is higher than the overflow port, the sewage is discharged through the overflow port; an overflow pump pool, used to accommodate the discharged sewage, and when the liquid level data (H4) of the fourth liquid level meter reaches the highest value of the overflow pump pool, the overflow pump is started; an overflow pipeline, connected to the overflow pump, is used to adjust the opening and closing of the first electric valve and the second electric valve according to the flow data (Q2) of the second flow meter. In this way, the overflow sewage is dynamically treated according to the treatment capacity of the sewage treatment plant. When the overflow sewage is less, the overflow sewage is discharged back to the treatment structure, and when the overflow sewage is too much, the sewage is discharged outside the plant, solving the problems of low sewage treatment efficiency and greater environmental pollution when treating overflow sewage in the prior art.

Description

Technical Field

[0001] The invention relates to the field of water treatment, and in particular to an anti-flooding system and method. Background Art

[0002] At present, there are more than 200 underground sewage treatment plants in China, including a large number of fully underground water plants. In the sewage treatment process of fully underground water plants, the treatment structures and treatment equipment are prone to overflow, and the pipelines and pools in the underground boxes are also prone to leakage. Once a serious overflow accident occurs, it will cause the water plant to stop production, which will in turn cause property losses, affect people's lives, and cause serious environmental pollution. In related technologies, the overflow sewage of the treatment structure is stored in an overflow tank, and the overflow sewage of the overflow tank is directly discharged into the underground box of the sewage plant. However, the direct discharge of sewage damages the ecological environment around the sewage plant, and also greatly reduces the efficiency of water treatment in the sewage plant.

[0003] Therefore, there is an urgent need to provide an improved anti-flooding system and method that can solve the technical problems of reduced operating efficiency and severe environmental pollution when an overflow accident occurs in an underground sewage treatment plant. Summary of the invention

[0004] The present invention aims to provide an anti-flooding system and method, which can solve the above technical problems.

[0005] According to one aspect of the present invention, there is provided an anti-flooding system for an underground sewage treatment plant, comprising: a pretreatment structure, a water treatment structure and a terminal lifting structure, through which the sewage is discharged when the sewage is higher than an overflow port; an overflow pump tank, for accommodating the discharged sewage and starting the overflow pump when the liquid level data (H4) of the fourth liquid level meter reaches the highest value of the overflow pump tank; and an overflow pipeline, connected to the overflow pump, for adjusting the opening and closing of the first electric valve and the second electric valve according to the flow data (Q2) of the second flow meter.

[0006] Preferably, when the flow data (Q2) indicates that the total overflow flow does not exceed the remaining treatment capacity of the sewage treatment plant, the first electric valve is opened and the second electric valve is closed to allow the overflow sewage to flow into the pretreatment structure; when the flow data (Q2) indicates that the total overflow flow exceeds the remaining treatment capacity of the sewage treatment plant, the first electric valve is closed and the second electric valve is opened to allow the overflow sewage to be discharged outside the sewage treatment plant.

[0007] Preferably, the anti-flooding system also includes: a liquid level regulating system connected to the water inlet of the pretreatment structure, for regulating the water inlet according to the liquid level data (H3) of the third liquid level meter and the flow data (Q1) of the first flow meter of the water treatment structure.

[0008] Preferably, the liquid level regulation system includes: a regulating valve, which is used to adjust the water intake by reducing the opening when the liquid level data (H2) of the second liquid level gauge of the water intake pump station is higher than the safe water level; and a lifting pump, which is used to adjust the water intake by frequency conversion regulation or adjusting the number of running water pumps when the liquid level data (H2) is not higher than the safe water level.

[0009] Preferably, the liquid level regulating system also regulates the water intake according to the third flow meter data (Q3) of the drainage pipeline.

[0010] Preferably, the anti-flooding system also includes: a sewage pump pool, when the sewage is higher than the top of the sewage pump pool, the sewage is discharged into the drainage pump pool through the water inlet hole; the drainage pump pool starts the drainage pump when the liquid level data (H6) of the sixth liquid level gauge rises to be roughly the same as the liquid level data (H5) of the fifth liquid level gauge; a drainage pipeline is connected to the drainage pump, and is used to adjust the opening and closing of the third electric valve and the fourth electric valve according to the flow data (Q3) of the third flow meter.

[0011] Preferably, when the flow data (Q3) indicates that the total sewage discharge flow does not exceed the remaining treatment capacity of the sewage treatment plant, the third electric valve is opened and the fourth electric valve is closed to allow the drainage sewage to flow into the pretreatment structure; when the flow data (Q3) indicates that the total sewage discharge flow exceeds the remaining treatment capacity of the sewage treatment plant, the third electric valve is closed and the fourth electric valve is opened to allow the overflow sewage to be discharged outside the sewage treatment plant.

[0012] Preferably, the anti-flooding system also includes a quick-closing valve located in the water inlet well, which is used to cut off the water inlet from the water inlet well to the water inlet pump station when the sewage treatment plant loses power.

[0013] According to another aspect of the present invention, there is provided a method for preventing flooding, comprising the following steps: sewage from a pretreatment structure, a water treatment structure and a terminal lifting structure is discharged from an overflow port into an overflow pump pool; liquid level data (H4) of a fourth liquid level meter is monitored, and when the liquid level data (H4) reaches a maximum value of the overflow pump pool, the overflow pump is started to discharge the sewage through an overflow pipeline; flow data (Q2) of a second flow meter is monitored, and when the flow data (Q2) indicates that the overflow capacity of the overflow pump does not exceed the processing capacity of the sewage treatment plant, the first electric valve is opened, the second electric valve is closed, and the sewage is discharged into the pretreatment structure.

[0014] Preferably, when the flow data (Q2) indicates that the overflow capacity of the overflow pump exceeds the treatment capacity of the sewage treatment plant, the first electric valve is closed, the second electric valve is opened, and the sewage is discharged outside the sewage treatment plant.

[0015] The present invention provides an anti-flooding system and method, including: a pre-treatment structure, a water treatment structure and a terminal lifting structure, when the sewage is higher than the overflow port, the sewage is discharged through the overflow port; an overflow pump pool, used to accommodate the discharged sewage, and when the liquid level data (H4) of the fourth liquid level meter reaches the highest value of the overflow pump pool, the overflow pump is started; an overflow pipeline, connected to the overflow pump, is used to adjust the opening and closing of the first electric valve and the second electric valve according to the flow data (Q2) of the second flow meter. In this way, the overflow sewage is dynamically treated according to the treatment capacity of the sewage treatment plant. When the overflow sewage is less, the overflow sewage is discharged back to the treatment structure, and when the overflow sewage is too much, the sewage is discharged outside the plant, solving the problems of low sewage treatment efficiency and greater environmental pollution when treating overflow sewage in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 is a schematic diagram of an anti-flooding system according to an anti-flooding system and method according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of an overflow processing flow of an anti-flooding system and method according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a liquid level adjustment process of an anti-flooding system and method according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a drainage process of a flood prevention system and method according to an embodiment of the present invention; and

[0021] Figure 5 The invention is a schematic diagram of the operation flow of a quick-closing valve in an emergency power outage condition of an anti-flooding system and method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Figure 1 and Figure 2The schematic diagram of the anti-flooding system and the schematic diagram of the overflow treatment process of an anti-flooding system and method according to an embodiment of the present invention are respectively shown. As shown in the figure, the anti-flooding system is used in an underground sewage treatment plant, and includes: a pretreatment structure, a water treatment structure, and a terminal lifting structure. When the sewage is higher than the overflow port, the sewage is discharged through the overflow port; an overflow pump pool, which is used to accommodate the discharged sewage and start the overflow pump when the liquid level data (H4) of the fourth liquid level meter reaches the highest value of the overflow pump pool; an overflow pipeline, connected to the overflow pump, is used to adjust the opening and closing of the first electric valve and the second electric valve according to the flow data (Q2) of the second flow meter.

[0024] According to an embodiment of the present invention, when the flow data (Q2) indicates that the total overflow flow does not exceed the remaining treatment capacity of the sewage treatment plant, the first electric valve is opened and the second electric valve is closed, so that the overflow sewage flows into the pretreatment structure; when the flow data (Q2) indicates that the total overflow flow exceeds the remaining treatment capacity of the sewage treatment plant, the first electric valve is closed and the second electric valve is opened, so that the overflow sewage is discharged outside the sewage treatment plant. The remaining treatment capacity of the sewage treatment plant is the total flow of overflow sewage that the sewage treatment plant can process in addition to the inflow flow of the water inlet section.

[0025] Specifically, one or more overflow pump pools can be set up in the underground water plant according to the estimated overflow demand of the sewage plant. The side walls and top plate of the overflow pump pool should reach the ground height of -1 floor. When an overflow pump pool is set up in the underground box, its volume should be enough to store the overflow water generated after the operation of each treatment structure stops during a power outage. The bottom of the overflow pump pool is at the elevation of the -3 floor bottom plate of the underground box, and the top of the pool is at the elevation of the -1 floor bottom plate of the underground box.

[0026] In the related art, a sewage treatment plant is provided with one or more overflow tanks for receiving overflow sewage. When the overflow accident is serious, the overflow tank volume is insufficient to accommodate the overflow sewage, and the sewage needs to be discharged out of the plant through pipelines. However, the overflow discharge method of the prior art will cause serious pollution to the surrounding ecological environment and reduce the efficiency of sewage treatment. The embodiment of the present invention provides an anti-flooding system, which can control the overflow sewage to be discharged into the pretreatment structure or discharged out of the sewage treatment plant according to the flow rate of the overflow sewage, which can effectively reduce environmental pollution problems and improve the efficiency of sewage treatment.

[0027] Figure 1 and Figure 3 The schematic diagram of the anti-flooding system and the schematic diagram of the liquid level adjustment process of an anti-flooding system and method according to an embodiment of the present invention are respectively shown. As shown in the figure, the anti-flooding system further includes: a liquid level adjustment system connected to the water inlet of the pretreatment structure, used to adjust the water inlet of the water inlet according to the liquid level data (H3) of the third liquid level meter of the water treatment structure and the flow data (Q1) of the first flow meter.

[0028] According to an embodiment of the present invention, the liquid level regulation system includes: a regulating valve, which is used to adjust the water intake by reducing the opening when the liquid level data (H2) of the second liquid level gauge of the water intake pump station is higher than the safe water level; and a lifting pump, which is used to adjust the water intake by frequency conversion regulation or adjusting the number of running water pumps when the liquid level data (H2) is not higher than the safe water level.

[0029] According to an embodiment of the present invention, the liquid level regulating system further regulates the water intake according to the third flow meter data (Q3) of the drainage pipeline.

[0030] Specifically, through the mutual adjustment of the regulating valve and the lifting pump, the operating liquid level of the water inlet section can be controlled within a safe range even when there is excess water inflow.

[0031] In the related art, the water inlet level adjustment in the anti-flooding system depends on the change of the liquid level or flow rate of the water inlet section, which is difficult to reflect the operation status of the water overflow system or the drainage system, resulting in the water inlet level adjustment being delayed in the occurrence and aggravation of the overflow accident, affecting the working efficiency of the anti-flooding system. The embodiment of the present invention provides an anti-flooding system, which dynamically adjusts the specific method of water inlet level adjustment according to the state of overflow processing and drainage processing, thereby solving the technical problem of water inlet level adjustment hysteresis.

[0032] Figure 1 and Figure 4 The schematic diagram of the anti-flooding system and the schematic diagram of the drainage process of an anti-flooding system and method according to an embodiment of the present invention are respectively shown. As shown in the figure, the anti-flooding system also includes: a sewage pump pool, when the sewage is higher than the top of the sewage pump pool, the sewage is discharged into the drainage pump pool through the water inlet hole; the drainage pump pool starts the drainage pump when the liquid level data (H6) of the sixth liquid level meter rises to be roughly the same as the liquid level data (H5) of the fifth liquid level meter; the drainage pipeline is connected to the drainage pump, and is used to adjust the opening and closing of the third electric valve and the fourth electric valve according to the flow data (Q3) of the third flow meter.

[0033] According to an embodiment of the present invention, when the flow data (Q3) indicates that the total sewage flow does not exceed the remaining treatment capacity of the sewage treatment plant, the third electric valve is opened and the fourth electric valve is closed, so that the flood-draining sewage flows into the pre-treatment structure; when the flow data (Q3) indicates that the total sewage flow exceeds the remaining treatment capacity of the sewage treatment plant, the third electric valve is closed and the fourth electric valve is opened, so that the overflow sewage is discharged outside the sewage treatment plant. The remaining treatment capacity of the sewage treatment plant is the total flow of flood-draining sewage that the sewage treatment plant can process in addition to the inflow flow of the water inlet section.

[0034] Specifically, one or more sewage pump pools and drainage pump pools can be set up according to the estimated drainage situation of the sewage treatment plant. The size of the sewage pump pool's water inlet hole should meet the flow requirements of the sewage pump, and the elevation of the sewage pump pool's water inlet hole should be lower than the lowest point of the underground sewage treatment plant's pipe gallery; the size of the drainage pump pool's water inlet hole should meet the drainage pump's flow requirements, and the elevation of the drainage pump pool's water inlet hole should be higher than the pipe gallery's ground by a certain distance. When the sixth and fifth liquid level gauges located in the drainage pump pool and sewage pump pool find overflow, notify the operating personnel to take countermeasures. After exceeding the safe liquid level, the drainage pump and emergency ventilation system will automatically operate; the sewage pump outlet pipe is connected to the pretreatment system, and the drainage pump outlet pipe passes through the third flow meter and the third and fourth electric valves, and can discharge the drainage sewage to the pretreatment structure or the sewage pipeline outside the plant according to the drainage flow.

[0035] In the related art, a sewage treatment plant is provided with one or more drainage pools for receiving sewage that exceeds the capacity of the sewage pool. When the amount of drainage sewage is large, the volume of the drainage pool is insufficient to accommodate the sewage, and the sewage needs to be discharged out of the plant through pipelines. However, the drainage method of the prior art will cause serious pollution to the surrounding ecological environment and reduce the efficiency of sewage treatment. The embodiment of the present invention provides an anti-flooding system, which can control the sewage to be discharged into a pretreatment structure or discharged out of the sewage treatment plant according to the flow rate of the drainage sewage, which can effectively reduce environmental pollution problems and improve the efficiency of sewage treatment.

[0036] Figure 1 and Figure 5 A schematic diagram of an anti-flooding system and a schematic diagram of an operation flow of a quick-closing valve in an emergency power outage condition are respectively shown. As shown in the figure, the anti-flooding system also includes a quick-closing valve located in the water inlet well, which is used to cut off the water inflow from the water inlet well to the water inlet pump station when the sewage treatment plant is out of power.

[0037] Specifically, the rapid closing gate installed in the water inlet well should be on the positive pressure side, and the top plate of the water inlet well should be higher than the ground around the underground sewage treatment plant; the super-high volume of the water inlet pump room meets the maximum water inlet flow rate within the closing time of the rapid closing gate, so that the sewage treatment plant will not suffer flooding accidents in the event of a sudden power outage.

[0038] According to another embodiment of the present invention, a flooding prevention method is provided, comprising the following steps: sewage from a pretreatment structure, a water treatment structure and a terminal lifting structure is discharged from an overflow port into an overflow pump pool; liquid level data (H4) of a fourth liquid level meter is monitored, and when the liquid level data (H4) reaches the highest value of the overflow pump pool, the overflow pump is started to discharge the sewage through the overflow pipeline; flow data (Q2) of a second flow meter is monitored, and when the flow data (Q2) indicates that the overflow capacity of the overflow pump does not exceed the processing capacity of the sewage treatment plant, the first electric valve is opened, the second electric valve is closed, and the sewage is discharged into the pretreatment structure.

[0039] According to an embodiment of the present invention, when the flow data (Q2) indicates that the overflow capacity of the overflow pump exceeds the treatment capacity of the sewage treatment plant, the first electric valve is closed, the second electric valve is opened, and the sewage is discharged outside the sewage treatment plant.

[0040] The present invention has the following effects:

[0041] (1) It has a wide range of uses and can be widely used in underground and semi-underground water supply plants, sewage plants, and recycled water plants;

[0042] (2) It can realize fully automatic operation and improve the safety operation guarantee of the groundwater plant;

[0043] (3) It can achieve full coverage of the water intake section, various process treatment sections, and various underground spaces;

[0044] (4) It can handle a variety of accident conditions such as excessive water inflow, various accident overflows, pipeline corridor leakage, power outages, etc.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flood prevention system for underground sewage treatment plants, characterized in that: include: The pre-treatment structure, the water treatment structure and the terminal lifting structure are used to discharge the sewage through the overflow port when the sewage is higher than the overflow port; An overflow pump pool, used to accommodate the discharged sewage, and to start the overflow pump when the liquid level data H4 of the fourth liquid level meter reaches the highest value of the overflow pump pool, wherein the fourth liquid level meter is arranged in the overflow pump pool; an overflow pipeline connected to the overflow pump, used to adjust the opening and closing of the first electric valve and the second electric valve according to the flow data Q2 of the second flow meter, the second flow meter is arranged at the outlet of the overflow pump, and the first electric valve and the second electric valve are arranged in the overflow pipeline; A sewage pump pool, when the sewage is higher than the top of the sewage pump pool, the sewage is discharged into the drainage pump pool through the water inlet hole; The drainage pump pool starts the drainage pump when the liquid level data H6 of the sixth liquid level gauge rises to be substantially flush with the liquid level data H5 of the fifth liquid level gauge, and the fifth liquid level gauge and the sixth liquid level gauge are respectively arranged in the sewage pump pool and the drainage pump pool; A drainage pipeline connected to the drainage pump, used to adjust the opening and closing of the third electric valve and the fourth electric valve according to the flow data Q3 of the third flow meter, the third liquid level meter is arranged in the water treatment structure, and the third electric valve and the fourth electric valve are both arranged in the drainage pipeline; When the flow data Q3 indicates that the total sewage flow does not exceed the remaining treatment capacity of the sewage treatment plant, the third electric valve is opened and the fourth electric valve is closed, so that the drainage sewage flows into the pretreatment structure; When the flow data Q3 indicates that the total sewage discharge flow exceeds the remaining treatment capacity of the sewage treatment plant, the third electric valve is closed and the fourth electric valve is opened to discharge the overflow sewage outside the sewage treatment plant.

2. The anti-flooding system according to claim 1, characterized in that: When the flow data Q2 indicates that the total overflow flow does not exceed the remaining treatment capacity of the sewage treatment plant, the first electric valve is opened and the second electric valve is closed, so that the overflow sewage flows into the pretreatment structure; When the flow data Q2 indicates that the total overflow flow exceeds the remaining treatment capacity of the sewage treatment plant, the first electric valve is closed and the second electric valve is opened to discharge the overflow sewage out of the sewage treatment plant.

3. The anti-flooding system according to claim 1, characterized in that: Also includes: The liquid level regulating system is connected to the water inlet of the pretreatment structure and is used to adjust the water inlet of the water inlet according to the liquid level data H3 of the third liquid level meter of the water treatment structure and the flow data Q1 of the first flow meter. The first flow meter is arranged at the water inlet of the overflow pump pool.

4. The anti-flooding system according to claim 3, characterized in that: The liquid level regulating system comprises: A regulating valve, used for regulating the water inflow by reducing the opening when the liquid level data H2 of the second liquid level gauge of the water inflow pump station is higher than the safe water level, and the second liquid level gauge is arranged at the water inflow pump station; The lifting pump is used to adjust the water intake by frequency conversion or adjusting the number of running water pumps when the liquid level data H2 is not higher than the safe water level.

5. The anti-flooding system according to claim 4, characterized in that: The liquid level regulating system also regulates the water intake according to the third flow meter data Q3 of the drainage pipeline, and the third flow meter is arranged at the outlet of the drainage pump.

6. The anti-flooding system according to claim 5, characterized in that: It also includes a quick-closing valve, which is located in the water inlet well and is used to cut off the water inlet from the water inlet well to the water inlet pump station when the sewage treatment plant loses power.

7. A method for preventing flooding, characterized in that: The following steps are involved: The sewage from the pretreatment structure, water treatment structure and terminal lifting structure is discharged into the overflow pump pool from the overflow port; Monitor the liquid level data H4 of the fourth liquid level meter, and when the liquid level data H4 reaches the highest value of the overflow pump pool, the overflow pump is started to discharge the sewage through the overflow pipeline; Monitoring the flow data Q2 of the second flow meter, when the flow data Q2 indicates that the overflow capacity of the overflow pump does not exceed the treatment capacity of the sewage treatment plant, opening the first electric valve, closing the second electric valve, and the sewage is discharged into the pretreatment structure; When the sewage is higher than the top of the sewage pump pool, the sewage is discharged into the drainage pump pool through the water inlet hole; When the liquid level data H6 of the sixth liquid level gauge rises to be substantially flush with the liquid level data H5 of the fifth liquid level gauge, the drainage pump is started; Connecting the drainage pipeline to the drainage pump to adjust the opening and closing of the third electric valve and the fourth electric valve according to the flow data Q3 of the third flow meter; When the flow data Q3 indicates that the total sewage flow does not exceed the remaining treatment capacity of the sewage treatment plant, the third electric valve is opened and the fourth electric valve is closed, so that the drainage sewage flows into the pretreatment structure; When the flow data Q3 indicates that the total sewage discharge flow exceeds the remaining treatment capacity of the sewage treatment plant, the third electric valve is closed and the fourth electric valve is opened to discharge the overflow sewage outside the sewage treatment plant.

8. The anti-flooding method according to claim 7, characterized in that: When the flow data Q2 indicates that the overflow capacity of the overflow pump exceeds the processing capacity of the sewage treatment plant, the first electric valve is closed, the second electric valve is opened, and the sewage is discharged outside the sewage treatment plant.

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