Water treatment structure backwashing method and system

Abstract

The water treatment structure backwashing method and system provided by the invention comprises the following steps: detecting data of a flow meter and a vacuum meter of water flow in a drainage assembly, and closing a first valve, a second valve and a sand discharge pump in the drainage assembly under the condition that the data of the flow meter and the vacuum meter is lower than a preset threshold value; wherein the drainage assembly is used for discharging silt in the grit chamber and the sand collecting hopper; after the drainage assembly is closed, the flushing assembly is started to flush the sand collecting hopper with clear water; and closing the flushing assembly and opening the drainage assembly so as to discharge sewage after flushing the sand collecting hopper. Therefore, the technical problems that in the prior art, a backwashing system needs to be additionally matched with a water treatment structure, so that the system is complex, investment cost and operation cost are high, the system easily breaks down, and potential safety hazards are high are solved.

Description

Technical Field

[0001] This invention relates to the field of water treatment, and specifically to a backwashing method and system for water treatment structures. Background Technology

[0002] Grit chambers and sedimentation tanks are among the most commonly used structures in water treatment systems, and one of their key functions is to remove settled sand and sludge. However, sand and sludge pumps typically operate intermittently, and are therefore susceptible to accumulating sand and sludge in the sand and sludge collection hoppers due to factors such as water quality, sedimentation efficiency, and operating intervals, leading to caking and malfunction of the pumps. Consequently, this process section requires a separate backwashing system, typically necessitating the addition of backwash pumps or fans, backwash pipelines, backwash water sources, or pools, resulting in a highly complex system that increases investment and operating costs. Furthermore, this complexity can easily lead to backwashing system malfunctions, causing the grit chamber to become inoperable. In severe cases, this necessitates production shutdowns and manual cleaning, which poses a significant safety hazard as grit chambers and sedimentation tanks are confined spaces and are prone to generating hazardous gases. Summary of the Invention

[0003] This invention aims to provide a backwashing method and system for water treatment structures, which can solve the technical problems of the aforementioned separate backwashing systems, which result in complex systems, high investment and operating costs, easy system failures, and high safety hazards. The technical solution of this application was previously filed as a patent application on January 20, 2025, entitled "A Backwashing Method and System for Water Treatment Structures," application number 202410487827.3.

[0004] According to one aspect of the present invention, a backwashing method for a water treatment structure is provided, comprising: detecting flow meter and vacuum meter data of water flow in a drainage assembly, and closing a first valve, a second valve, and a sand discharge pump in the drainage assembly when the flow meter and vacuum meter data are lower than a preset threshold, wherein the drainage assembly is used to discharge silt and sand from a sedimentation tank and a sand collection hopper; after the drainage assembly is closed, opening a flushing assembly to flush the sand collection hopper with clean water; closing the flushing assembly and opening the drainage assembly to discharge the wastewater after flushing the sand collection hopper.

[0005] Preferably, after closing the first valve, the second valve, and the sand discharge pump, the liquid level data of the clear water zone of the sedimentation tank is detected; if the liquid level data meets the water intake requirements, the third valve and the fourth valve in the flushing assembly are opened, and the sand discharge pump is started to flush the sand collection hopper with clear water.

[0006] Preferably, if the liquid level data does not meet the water intake requirements, the third and fifth valves in the flushing assembly are opened, and the sand discharge pump is started to flush the sand collection hopper with recycled water from outside the sedimentation tank.

[0007] Preferably, if the liquid level data does not meet the water intake requirements, the data of the second flow meter and vacuum gauge in the second drainage component are checked to see if they exceed the threshold. The second drainage component is connected to the drainage component and the flushing component through the main outlet pipe. If the data of the second flow meter and vacuum gauge do not exceed the threshold, the seventh valve located on the main outlet pipe is closed and the sixth valve in the drainage component is opened to flush the sand collection hopper with the water from the second drainage component.

[0008] Preferably, when the data from the second flow meter and vacuum meter are below the threshold, the second liquid level data of the clear water zone of the second sedimentation tank is detected; when the second liquid level data meets the water intake requirements, the seventh valve located on the main outlet pipe and the first valve in the second flushing assembly are closed, the sixth valve in the drainage assembly is opened, and the ninth valve, the first valve, and the second sand discharge pump in the second drainage assembly are opened to flush the sand collection hopper with clear water from the clear water zone of the second sedimentation tank.

[0009] Preferably, if the second liquid level data does not meet the water intake requirements, the third and fifth valves in the flushing assembly are opened, and the sand discharge pump is started to flush the sand collection hopper with recycled water from outside the sedimentation tank.

[0010] Preferably, the vacuum meter data of the clean water used to flush the sand collection hopper and the flow meter and vacuum meter data of the wastewater used to flush the sand collection hopper are uploaded to the central control room and input into the BIM model.

[0011] According to another aspect of the present invention, a backwashing system for a water treatment structure is provided, comprising: a sedimentation tank for settling silt in a sedimentation hopper; a drainage assembly for discharging silt from the sedimentation hopper; a monitoring and control assembly for detecting flow meter and vacuum meter data of the water flow in the drainage assembly, and shutting off the drainage assembly when the flow meter and vacuum meter data are lower than a preset threshold; a flushing assembly for flushing the sedimentation hopper with clean water after the drainage assembly is shut off; the monitoring and control assembly is further configured to shut off the flushing assembly and open the drainage assembly to discharge wastewater after flushing the sedimentation hopper.

[0012] Preferably, the backwashing system of the water treatment structure further includes a second sedimentation tank, a second drainage component, a second monitoring and control component, and a second flushing component, wherein the second drainage component and the second flushing component are connected to the drainage component and the flushing component through a main outlet pipe.

[0013] Preferably, the drainage assembly includes a first valve, a sand discharge pump, and a second valve connected in series, wherein the inlet of the drainage assembly is connected to the bottom of the sand collection hopper; the flushing assembly includes a third valve and a fourth valve, wherein one end of the fourth valve is connected to the clear water area of ​​the sedimentation tank, and the other end of the fourth valve is connected between the first valve and the inlet of the sand discharge pump; one end of the third valve is connected between the outlet of the sand discharge pump and the second valve, and the other end of the third valve is connected between the first valve and the inlet of the drainage assembly.

[0014] This invention provides a backwashing method and system for water treatment structures, comprising: detecting flow meter and vacuum gauge data of water flow in a drainage assembly; and closing a first valve, a second valve, and a sand discharge pump in the drainage assembly when the flow meter and vacuum gauge data are lower than a preset threshold, wherein the drainage assembly is used to discharge silt and sand from a sedimentation tank and a sand collection hopper; after the drainage assembly is closed, opening a flushing assembly to flush the sand collection hopper with clean water; and closing the flushing assembly and opening the drainage assembly to discharge the wastewater after flushing the sand collection hopper. This invention solves the technical problems of existing technologies that require a separate backwashing system for water treatment structures, resulting in complex systems, high investment and operating costs, easy system failures, and high safety hazards, and achieves fully automatic system operation, saving investment and operating costs. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 This is a schematic diagram of a single-pump operation system for a backwashing method and system for a water treatment structure according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the single-pump operation logic of a backwashing method and system for a water treatment structure according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of a dual-pump operating system for a backwashing method and system for a water treatment structure according to an embodiment of the present invention; and

[0019] Figure 4 This is a schematic diagram of the dual-pump operation logic of a backwashing method and system for a water treatment structure according to an embodiment of the present invention. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Reference will now be made in detail to various embodiments of the invention, examples of which are shown in the accompanying drawings and described below. For ease of interpretation and precise definition in the appended claims, the terms “upper,” “lower,” “inner,” and “outer” are used to describe features with reference to their location in the exemplary embodiments shown in the figures.

[0022] Figure 1 , Figure 2 A schematic diagram of a single-pump operation system and a schematic diagram of single-pump operation logic are shown for a backwashing method and system for a water treatment structure according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the backwashing method for the water treatment structure includes: detecting the flow meter and vacuum gauge data of the water flow in the drainage assembly, and closing the first valve, the second valve, and the sand discharge pump in the drainage assembly when the flow meter and vacuum gauge data are lower than a preset threshold, wherein the drainage assembly is used to discharge silt and sand in the sedimentation tank and sand collection hopper; after the drainage assembly is closed, the flushing assembly is opened to flush the sand collection hopper with clean water; the flushing assembly is closed and the drainage assembly is opened to discharge the wastewater after flushing the sand collection hopper.

[0023] According to an embodiment of the present invention, a backwashing method for a water treatment structure is provided, comprising: after closing a first valve, a second valve and a sand discharge pump, detecting the liquid level data of the clear water zone of a sedimentation tank; if the liquid level data meets the water intake requirements, opening the third valve and the fourth valve in the flushing assembly, and starting the sand discharge pump to flush the sand collection hopper with clear water.

[0024] According to an embodiment of the present invention, when the liquid level data does not meet the water intake requirements, the third and fifth valves in the flushing assembly are opened, and the sand discharge pump is started to flush the sand collection hopper with recycled water from outside the sedimentation tank.

[0025] In related technologies, a separate backwashing system is generally required to backwash the deposited sand and mud using sand and mud pumps. This necessitates the addition of backwashing water pumps or fans, backwashing pipelines, backwashing water sources or pools, etc., leading to system complexity, high investment costs, and high operating costs. This invention provides a backwashing method for water treatment structures that eliminates the need for additional flushing pump systems. The system is simple to implement, significantly reducing investment and operating costs. It can achieve fully automated operation and unmanned operation, reducing the difficulty of water plant operation and management.

[0026] Figure 3 , Figure 4 A schematic diagram of a dual-pump operation system and a schematic diagram of the dual-pump operation logic are shown for a backwashing method and system for a water treatment structure according to an embodiment of the present invention. Figure 3 and Figure 4As shown, the backwashing method for the water treatment structure further includes: when the liquid level data does not meet the water intake requirements, detecting whether the data of the second flow meter and vacuum gauge of the water flow in the second drainage component exceeds the threshold, wherein the second drainage component is connected to the drainage component and the flushing component through the main outlet pipe; when the data of the second flow meter and vacuum gauge are not lower than the threshold, closing the seventh valve located on the main outlet pipe and opening the sixth valve in the drainage component to flush the sand collection hopper with the water output of the second drainage component.

[0027] According to an embodiment of the present invention, the backwashing method for the water treatment structure further includes: when the data of the second flow meter and the vacuum meter are lower than the threshold, detecting the second liquid level data of the clear water zone of the second grit chamber; when the second liquid level data meets the water intake requirements, closing the seventh valve located on the main outlet pipe and the first valve in the second flushing assembly, opening the sixth valve in the drainage assembly, and opening the ninth valve, the first valve, and the second sand discharge pump in the second drainage assembly to flush the sand collection hopper with the clear water of the clear water zone of the second grit chamber.

[0028] According to an embodiment of the present invention, the backwashing method for the water treatment structure further includes: when the second liquid level data does not meet the water intake requirements, opening the third valve and the fifth valve in the flushing assembly, and starting the sand discharge pump to flush the sand collection hopper with recycled water from outside the sedimentation tank.

[0029] In existing technologies, it is often necessary to add a backwash water source or pool to flush sand and sludge pumps, and these methods cannot be used in dual-pump or multi-pump operating systems, resulting in wasted water resources and low safety. This invention provides a backwashing method for water treatment structures that can be applied to dual-pump or multi-pump systems. The flushing water can be sourced from various sources, such as the clear water area of ​​the structure itself, the system's main effluent, or the self-use system, ensuring high safety and conserving water resources.

[0030] According to an embodiment of the present invention, the backwashing method for water treatment structures further includes: uploading the vacuum meter data of the clean water used to flush the sand collection hopper and the flow meter and vacuum meter data of the wastewater used to flush the sand collection hopper to the central control room and inputting them into the BIM model.

[0031] In related technologies, backwashing systems suffer from complex management, numerous instruments, and inconvenience in construction and operation. This invention utilizes a BIM model for visual editing, which facilitates guidance for installation units during construction and allows for the collection of data from various devices and instruments within the system during the operation and maintenance phase. This data is then transmitted to the central control system for monitoring, and the model displays and simulates operations in real time.

[0032] According to another embodiment of the present invention, a backwashing system for a water treatment structure is provided, comprising: a sedimentation tank for settling silt in a sedimentation hopper; a drainage assembly for discharging silt from the sedimentation hopper; a monitoring and control assembly for detecting flow meter and vacuum meter data of water flow in the drainage assembly, and shutting off the drainage assembly when the flow meter and vacuum meter data are lower than a preset threshold; a flushing assembly for flushing the sedimentation hopper with clean water after the drainage assembly is shut off; the monitoring and control assembly is also used to shut off the flushing assembly and turn on the drainage assembly to discharge wastewater after flushing the sedimentation hopper.

[0033] According to an embodiment of the present invention, the backwashing system for water treatment structures further includes: a second sedimentation tank, a second drainage component, a second monitoring and control component, and a second flushing component. The second drainage component and the second flushing component are connected to the drainage component and the flushing component through a main outlet pipe.

[0034] According to an embodiment of the present invention, the drainage component of the system includes: a first valve, a sand pump, and a second valve connected in series, wherein the inlet of the drainage component is connected to the bottom of the sand collection hopper.

[0035] According to an embodiment of the present invention, the flushing assembly of the system includes a third valve and a fourth valve, wherein one end of the fourth valve is connected to the clear water area of ​​the sedimentation tank, the other end of the fourth valve is connected between the first valve and the inlet of the sand discharge pump, one end of the third valve is connected between the outlet of the sand discharge pump and the second valve, and the other end of the third valve is connected between the first valve and the inlet of the drainage assembly.

[0036] The present invention has the following effects:

[0037] (1) It has a wide range of applications and can be widely used in various water supply plants, sewage plants and reclaimed water plants.

[0038] (2) The system is simple and easy to implement, and can be widely used for the renovation and upgrading of various existing water plants.

[0039] (3) No new flushing pump system is required, which greatly reduces investment and operating costs.

[0040] (4) It can achieve fully automatic operation and unmanned operation, reducing the difficulty of water plant operation and management.

[0041] (5) The rinsing water source is the clear water area of ​​the pool itself, which saves water resources.

[0042] (6) The rinsing water can be sourced from various sources, such as the clear water area of ​​the pool itself, the main outlet of the system, or the self-use system. The safety level is high.

[0043] (7) It facilitates visual editing of the design and is beneficial to guide the installation unit in construction. During the operation and maintenance phase, the data of each device and instrument in the collection system is transmitted to the central control system for monitoring. It can be displayed in the model in real time to achieve visual management and simulate operation.

[0044] The above embodiments are merely examples to clearly illustrate the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the following description, and these variations, modifications, substitutions, and alterations arising from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A backwashing method of a water treatment structure, comprising the steps of: S1: detecting flow meter and vacuum gauge data of water flow in a drainage assembly, and closing a first valve, a second valve and a sand pump in the drainage assembly if the flow meter and vacuum gauge data are lower than a pre-set threshold, wherein the drainage assembly is used to drain the silt in a sand trap and a sand collector; S2: opening a flushing assembly to flush the sand collector with clean water after the drainage assembly is closed; S3: closing the flushing assembly and opening the drainage assembly to drain the sewage after flushing the sand collector.

2. The backwashing method of a water treatment structure according to claim 1, wherein: after closing the first valve, the second valve and the sand pump, detecting liquid level data of a clean water area of the sand trap; if the liquid level data meet the water demand, opening a third valve and a fourth valve in the flushing assembly, and starting the sand pump to flush the sand collector with clean water.

3. The backwashing method of a water treatment structure according to claim 2, wherein: if the liquid level data do not meet the water demand, opening a third valve and a fifth valve in the flushing assembly, and starting the sand pump to flush the sand collector with reclaimed water outside the sand trap.

4. The backwashing method of a water treatment structure according to claim 3, wherein: if the liquid level data do not meet the water demand, detecting whether second flow meter and vacuum gauge data of water flow in a second drainage assembly are lower than the threshold, wherein the second drainage assembly is connected to the drainage assembly, the flushing assembly and a total water outlet pipe; if the second flow meter and vacuum gauge data are not lower than the threshold, closing a seventh valve on the total water outlet pipe, and opening a sixth valve in the drainage assembly to flush the sand collector with water outlet of the second drainage assembly.

5. The backwashing method of a water treatment structure according to claim 4, wherein: if the second flow meter and vacuum gauge data are lower than the threshold, detecting second liquid level data of a clean water area of a second sand trap; if the second liquid level data meet the water demand, closing a seventh valve on the total water outlet pipe and a tenth valve in a second flushing assembly, opening a sixth valve in the drainage assembly, opening a ninth valve, an eleventh valve and a second sand pump in the second drainage assembly to flush the sand collector with clean water of the clean water area of the second sand trap.

6. The backwash method of a water treatment structure according to claim 5, wherein if the second liquid level data do not meet the water demand, opening a third valve and a fifth valve in the flushing assembly, and starting the sand pump to flush the sand collector with reclaimed water outside the sand trap.

7. The backwash method of a water treatment structure according to any one of claims 1 to 6, characterized in that, uploading vacuum gauge data of clean water for flushing the sand collector and flow meter and vacuum gauge data of sewage after flushing the sand collector to a control room and inputting into a BIM model.

8. A backwashing system of a water treatment structure, comprising: a sand trap for depositing silt in a sand collector; A drainage assembly for draining the silt in the sand collecting hopper; Further comprising: A monitoring assembly for detecting the flow meter and vacuum gauge data of the water flow in the drainage assembly, and shutting down the drainage assembly when the flow meter and vacuum gauge data are lower than the pre-set threshold; A flushing assembly for flushing the sand collecting hopper with clean water after the drainage assembly is shut down; The monitoring assembly is further used to shut down the flushing assembly and open the drainage assembly to drain the sewage after flushing the sand collecting hopper.

9. The backwash system for a water treatment structure of claim 8, wherein, Further comprising: A second sand settling tank, a second drainage assembly, a second monitoring assembly and a second flushing assembly, the second drainage assembly and the second flushing assembly are connected to the drainage assembly and the flushing assembly through a total water outlet pipe.

10. The backwashing system of the water treatment structure according to claim 9, wherein, The drainage assembly comprises a first valve, a sand pump and a second valve connected in series, wherein the water inlet of the drainage assembly is connected to the bottom of the sand collecting hopper; The flushing assembly comprises a third valve and a fourth valve, wherein one end of the fourth valve is connected to the clean water area of the sand settling tank, the other end of the fourth valve is connected between the water inlet of the first valve and the sand pump, one end of the third valve is connected between the water outlet of the sand pump and the second valve, and the other end of the third valve is connected between the first valve and the water inlet of the drainage assembly.

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