Intelligent dosing system for wastewater treatment plants

Abstract

This utility model relates to the field of wastewater treatment technology, and in particular to an intelligent dosing system for wastewater treatment plants. It includes: a wastewater treatment component for treating wastewater generated during tunnel construction; a sludge treatment component for treating separated sludge; an automatic dosing system for injecting chemicals into the wastewater treatment component; and water quality monitoring equipment for monitoring the pH value and suspended solids (SS) concentration of the tunnel wastewater. The water quality monitoring equipment, through a PLC control system, adjusts the dosage of the automatic dosing system to achieve dynamic treatment of the tunnel wastewater. The PLC control system collects pH and SS monitoring data to control the automatic dosing of chemicals and the opening and closing of pipeline valves. This device enables real-time monitoring of water quality, avoiding the traditional fully manual operation method and preventing water quality exceeding standards due to inadequate manual detection. Data and operational status can be remotely monitored at any time.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an intelligent dosing system for wastewater treatment plants. Background Technology

[0002] In order to meet the sewage discharge requirements generated by the tunnel and protect local water sources from pollution, each section will set up a sewage treatment plant to treat the sewage generated during the tunnel construction process. Currently, traditional water treatment methods have several problems, such as difficulty in controlling pH value and turbidity, and high requirements for the accuracy of chemical dosing.

[0003] First, pH adjustment is a crucial step in water treatment, significantly impacting water quality stability and the operational status of water-using equipment. However, traditional water treatment methods face considerable challenges in adjusting pH levels, making precise and stable pH control difficult. This can lead to fluctuations in water quality, consequently affecting water safety.

[0004] Secondly, turbidity is an important indicator of water clarity. Traditional water treatment methods are effective in reducing turbidity, but their ability to treat turbidity caused by fine particles and organic matter is limited. The presence of these substances can seriously affect the transparency and taste of water, thus impacting water quality.

[0005] Furthermore, traditional water treatment systems have a low level of automation, and the ease of operation directly affects the treatment effect. In practical applications, operators need to make corresponding adjustments based on different water qualities and treatment requirements, which requires certain skills and experience. At the same time, the cumbersome operating procedures also increase the difficulty and cost of treatment.

[0006] Finally, the accuracy and stability of chemical dosage are another major challenge in traditional water treatment. In traditional water treatment, the dosage of chemicals plays a crucial role in the treatment effect. However, due to the lack of precise metering and control systems, the dosage is difficult to control accurately. This can lead to fluctuations in treatment effectiveness and even secondary pollution. Furthermore, inappropriate use of chemicals can increase treatment costs and waste resources. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an intelligent dosing system for sewage treatment plants.

[0008] In a first aspect, this utility model provides an intelligent dosing system for wastewater treatment plants, comprising: Wastewater treatment components are used to treat wastewater generated during tunnel construction. Sludge treatment unit for treating separated sludge; An automatic dosing system is used to inject conditioning agents into the wastewater treatment components; Water quality monitoring equipment is used to monitor the pH value and suspended solids (SS) concentration of tunnel wastewater; the water quality monitoring equipment adjusts the dosage of the automatic dosing system through a PLC control system to achieve dynamic treatment of tunnel wastewater; The PLC control system collects pH and SS monitoring data to control the automatic dosing system for automatic chemical dosing and the opening and closing of pipeline valves.

[0009] Preferably, the wastewater treatment assembly includes a grit chamber, a sedimentation tank, a static wastewater mixer, a sludge-water rapid separation tank, and an automatic coke adsorption filtration device, which are connected in sequence via wastewater pipes. The automatic dosing system is connected to the static wastewater mixer and is used to add chemicals to the static wastewater mixer to react with the wastewater.

[0010] The grit chamber is the first-stage wastewater treatment station. Wastewater mixed with sludge generated during tunnel construction undergoes initial separation in the grit chamber. The initially separated wastewater then enters the second-stage treatment station, the sedimentation tank, through the wastewater pipeline. The sedimentation tank is used to regulate and settle the wastewater, further separating out some sludge. The second-stage separated wastewater then enters the static wastewater mixer. The static wastewater mixer is connected to an automatic dosing system to add chemicals to the device to react with the wastewater, bringing it to a level that meets discharge standards. The static wastewater mixer is the third-stage treatment station. The wastewater then flows through the pipeline into the rapid sludge-water separation tank for sludge-water separation. More than 90% of particulate matter, suspended solids, heavy metals, and harmful substances from explosives can be separated and precipitated. The treated water finally enters an automatic coke adsorption filtration device for further treatment. After five stages of treatment, the effluent meets the "Integrated Wastewater Discharge Standard" (GB8978-1996).

[0011] More preferably, the automatic coke adsorption filtration device uses coke as the adsorption / filtration medium, mainly for removing fluids, primarily purifying impurities, pollutants, or specific components from water. A backwashing assembly is installed between the automatic coke adsorption filtration device and the grit chamber. This backwashing assembly includes a backwashing pipeline and a high-pressure pump, using purified water to backwash the sediment in the grit chamber and remove any sludge or dirt not properly treated by the sludge pump. This prevents blockage of the grit chamber's outlet, achieving self-cleaning of the grit chamber, enabling unattended operation of the wastewater treatment equipment, and reducing maintenance costs.

[0012] The PLC control system is set to activate the high-pressure backwashing component to backwash the grit treatment tank according to a preset time cycle. The user can configure the system to perform backwashing periodically according to a certain time cycle (such as once a week, once every two weeks, once a month, etc., depending on the actual situation) based on the actual sewage discharge situation.

[0013] The high-pressure pump is a multi-stage high-pressure centrifugal pump used to pressurize the sewage to the optimal pressure state before it enters the grit treatment tank to achieve the best flushing efficiency.

[0014] Preferably, the sludge treatment assembly includes a sludge thickening tank, which is connected to the grit treatment tank via a first sludge pump pipeline, and the sludge thickening tank is connected to the sedimentation tank via a second sludge pump pipeline. It also includes a filter press, which is connected to the sludge thickening tank. The sludge is pumped to the sludge thickening tank via the grit treatment tank or the sedimentation tank, and after being processed by the filter press, it is transported to a landfill for disposal.

[0015] Preferably, the sludge treatment assembly further includes a sludge drying field, which is connected to the grit chamber via a first sludge pump pipeline, and the sludge drying field is connected to the sedimentation tank via a second sludge pump pipeline. The sludge settled in the grit chamber and the sedimentation tank is pumped into the sludge drying field via the sludge pump pipeline for pressing treatment before being transported to landfill.

[0016] Preferably, the automatic dosing system includes an acid metering pump, a PAC metering pump, a PAM metering pump, and a reagent stirrer. One end of the acid metering pump is connected to an acid tank via a pipe, and the other end is connected to a static wastewater mixer via a pipe. One end of the PAC metering pump is connected to a PAC reagent tank via a pipe, and the other end is connected to the static wastewater mixer via a pipe. One end of the PAM metering pump is connected to a PAM reagent tank via a pipe, and the other end is connected to the static wastewater mixer via a pipe. The reagent stirrer is installed in the static wastewater mixer to thoroughly stir and react the different reagents with the wastewater, thereby improving wastewater purification efficiency.

[0017] Preferably, the water quality monitoring equipment includes an online pH analyzer and an online turbidity analyzer. The online pH analyzer includes several pH sensor probes, which are distributed at various locations within the static wastewater mixer, including near the inlet, in the middle of the mixer, and at the outlet. Through monitoring feedback from multiple sensor probes, dynamic and accurate judgments are made and fed back to the PLC control system. The PLC control system then uses this feedback to further control the automatic dosing system to implement corresponding dosing strategies. Similarly, the online turbidity analyzer includes several SS value sensor probes, which are also distributed at various locations within the static wastewater mixer. Through monitoring feedback from multiple sensor probes, dynamic and accurate judgments are made and fed back to the PLC control system. The PLC control system then uses this feedback to further control the automatic dosing system to implement corresponding dosing strategies.

[0018] Preferably, when the online pH analyzer and online turbidity analyzer detect a value of 9, the automatic dosing system will automatically start to adjust the acid dosage until it is within the acceptable range. When the online SS analyzer detects an SS value of 60, the dosing system will automatically start to adjust the PAC / PAM dosage until it is within the acceptable range.

[0019] Automated dosing systems play a vital role in wastewater treatment. By precisely adding PAM, PAC, and citric acid, they help purify water, remove suspended solids and particulate matter, and improve water quality. This contributes to improving the aquatic ecosystem, protecting aquatic ecosystems, and maintaining biodiversity. The intelligent features of automated PAM dosing devices ensure stable and accurate dosing, improving the efficiency and effectiveness of water quality improvement.

[0020] Preferably, the automatic dosing system includes a control frequency converter, which provides power to the automatic dosing system to achieve automated control of the dosing amount. The control frequency converter eliminates the need for continuous monitoring of the dosing process, thus reducing power consumption.

[0021] Preferably, the PLC control system is electrically connected to the water quality monitoring equipment and the automatic dosing system, and sends data parameters to the cloud server through the network transmission module.

[0022] The PLC control system is connected to the data analysis platform, which analyzes and processes the data collected by the PLC control system and feeds it back to the PLC control system to dispense chemicals into the automatic dosing system, thereby achieving acid-base neutralization and coagulation sedimentation of wastewater in the static wastewater mixer.

[0023] Preferably, the PLC control system is equipped with an input / output interface for user interaction, which includes a touch screen, a display screen, and a keyboard and mouse; it is used for users (i.e. operators) to observe the system operation, including the detection values ​​during the sewage treatment process, as well as the parameters involved in the treatment process set or configured by the user.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The intelligent dosing system for wastewater treatment plants provided by this utility model can achieve real-time monitoring of water quality status and allow users to view the platform's operational status in real time via a browser. It displays relevant data in real time and performs data comparison and analysis. It statistically stores historical data such as pH, turbidity, and pollution levels for 24 hours, continuously saving historical data for seven days; thus enabling labor-saving, fully-involved operation of wastewater treatment plants; completely avoiding water quality exceeding standards due to inadequate manual testing. Data and operational status can be remotely monitored anytime, anywhere, eliminating the need for on-site inspections. The automatic dosing system can precisely control the amount of chemicals added, reducing manpower and material resources by more than 60%. Attached Figure Description

[0025] Figure 1 This is a system workflow diagram of this utility model.

[0026] Figure 2 This is a schematic diagram of the intelligent sewage treatment control device of this utility model.

[0027] Figure 3 This is a schematic diagram of the control system principle of the intelligent sewage treatment control device of this utility model.

[0028] Marked in the image: 1-Grit treatment tank, 2-Sedimentation tank, 3-Static sewage mixer, 4-Sludge-water rapid separation tank, 5-Automatic coke adsorption filtration device, 6-Automatic dosing system, 7-Sludge thickening tank, 8-Compressor, 9-Sludge drying field, 10-Backwash discharge pipeline; 11-First sludge pump pipeline, 12-Second sludge pump pipeline, 13-Electric sludge discharge valve, 14-High pressure pump, 15-Acid metering pump, 16-PAC metering pump, 17-PAM metering pump, 18-PLC control system, 19-Network transmission module, 20-Input / output interface, 21-Water quality monitoring equipment. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0030] Example 1 This embodiment provides an intelligent chemical dosing system for wastewater treatment plants, such as... Figure 1-3 As shown, the system includes: a wastewater treatment component for treating wastewater generated during tunnel construction; a sludge treatment component for treating separated sludge; an automatic dosing system 6 for injecting chemicals into the wastewater treatment component; a water quality monitoring device 21 for monitoring the pH value and suspended solids (SS) concentration of the tunnel wastewater; the water quality monitoring device adjusts the dosage of chemicals in the automatic dosing system 6 via a PLC control system 18 to achieve dynamic treatment of the tunnel wastewater; the PLC control system 18 collects pH monitoring data and SS monitoring data to control the automatic dosing of chemicals and the opening and closing of pipeline valves in the automatic dosing system 6.

[0031] In this preferred embodiment, the wastewater treatment components include a grit chamber 1, a sedimentation tank 2, a static wastewater mixer 3, a sludge-water rapid separation tank 4, and an automatic coke adsorption filtration device 5, all connected sequentially via wastewater pipelines. An automatic dosing system 6 is connected to the static wastewater mixer 3 and is used to add chemicals to the static wastewater mixer 3 to react with the wastewater. The grit chamber 1 is the first-stage wastewater treatment station. Wastewater mixed with sludge generated during tunnel construction undergoes preliminary separation in the grit chamber 1. The initially separated wastewater then enters the second-stage treatment station, the sedimentation tank 2, through the wastewater pipeline. The sedimentation tank 2 is used to regulate and settle the wastewater, further separating out some sludge. The second-stage separated wastewater then enters the static wastewater mixer 3.

[0032] The static wastewater mixer 3 is connected to an automatic dosing system 6 for adding chemicals to the device to react with the wastewater, bringing it to a level that meets discharge standards. The static wastewater mixer 3 is the third-stage treatment station. The wastewater then flows through a pipeline into a rapid sludge-water separation tank 4 for sludge-water separation. More than 90% of particulate matter, suspended solids, heavy metals, and harmful substances from explosives can be separated and settled. The treated water finally enters an automatic coke adsorption filtration device 5 for further treatment. After five stages of treatment, the effluent meets the "Integrated Wastewater Discharge Standard" (GB8978-1996).

[0033] In this preferred embodiment, a backwashing drain assembly is also included. This backwashing drain assembly is located between the automatic coke adsorption filter 5 and the grit chamber. The backwashing drain assembly includes a backwashing drain pipeline 10 and a high-pressure pump 14. The backwashing drain assembly is used to backwash the sludge in the grit chamber 1. The automatic coke adsorption filter 5 uses coke as an adsorption / filtration medium, mainly for removing fluids, primarily purifying impurities, pollutants, or specific components from water. The backwashing process uses purified water to backwash the sediment in the grit chamber 1, removing any sludge or dirt that the sludge pump failed to clean. This prevents blockage of the grit chamber 1's outlet, achieving self-cleaning of the grit chamber 1, enabling unattended operation of the wastewater treatment equipment, and reducing maintenance costs.

[0034] Preferably, the PLC control system is configured to activate the backwash pump assembly to backwash the grit chamber according to a preset time cycle. This configuration can be set by the user based on actual wastewater discharge conditions, allowing backwashing to occur periodically at certain time intervals (e.g., one week, two weeks, one month, depending on the actual situation). The high-pressure pump is a multi-stage high-pressure centrifugal pump used to pressurize the wastewater to an optimal pressure before it enters the grit chamber, maximizing the flushing efficiency.

[0035] Specifically, the sludge treatment assembly includes a sludge thickening tank 7, which is connected to the grit treatment tank 1 via a first sludge pump pipeline 11, and the sludge thickening tank 7 is connected to the sedimentation tank 2 via a second sludge pump pipeline 12. It also includes a filter press 8, which is connected to the sludge thickening tank 7. The sludge is pumped to the sludge thickening tank 7 via the grit treatment tank 1 or via the sedimentation tank 2, and after being processed by the filter press 8, it is transported to a landfill for disposal.

[0036] In this preferred embodiment, the sludge-water rapid separation tank 4 is connected to the sludge thickening tank 7 and the sludge drying field 9 respectively by sludge discharge pipes; an electric sludge discharge valve 13 is installed on the sludge discharge pipes; The sludge treatment assembly also includes a sludge drying field 9. The sludge drying field 9 is connected to the grit chamber 1 via a first sludge pump pipeline 11, and to the sedimentation tank 2 via a second sludge pump pipeline 12. The sludge settled in the grit chamber 1 and sedimentation tank 2 is pumped into the sludge drying field 9 for pressing before being transported for landfill. The sludge drying field 9 and the sludge thickening tank 7 operate as parallel sludge drying methods to ensure the other can function normally in the event of a failure in one.

[0037] Specifically, in this embodiment, the automatic dosing system 6 includes multiple acid metering pumps 15, multiple PAC metering pumps 16, multiple PAM metering pumps 17, and a chemical agitator. One end of each acid metering pump 15 is connected to an acid tank via a pipe, and the other end is connected to a static wastewater mixer 3 via a pipe. One end of each PAC metering pump 16 is connected to a PAC tank via a pipe, and the other end is connected to the static wastewater mixer 3 via a pipe. One end of each PAM metering pump 17 is connected to a PAM tank via a pipe, and the other end is connected to the static wastewater mixer 3 via a pipe. The chemical agitator is located in the static wastewater mixer 3. The system also includes a control frequency converter, which provides power to the automatic dosing system 6.

[0038] In this embodiment, the water quality monitoring equipment includes an online pH analyzer and an online turbidity analyzer. The online pH analyzer includes several pH sensor probes, which are distributed at various locations on the static wastewater mixer 3, including near the inlet, in the middle of the mixer, and at the outlet. The online turbidity analyzer includes several SS value sensor probes, which are also distributed at various locations on the static wastewater mixer 3. The PLC control system 18 is electrically connected to the water quality monitoring equipment 21 and the automatic dosing system 6, and sends data parameters to the cloud server via the network transmission module 19.

[0039] In this preferred embodiment, the PLC control system 18 is connected to a data analysis platform. The data analysis platform is used to analyze and process the data collected by the PLC control system 18 and feed it back to the PLC control system 18 to dispense the dosage of the automatic dosing system 6. The PLC control system 18 is equipped with an input / output interface 20 for user interaction. The input / output interface 20 includes a touch screen, a display screen, and a keyboard and mouse device. It is used for users to observe the system operation and to set or configure the parameters involved in the processing flow.

[0040] The intelligent dosing system for wastewater treatment plants provided in this embodiment can monitor water quality in real time and allow users to view the platform's operational status via a browser. It displays relevant data in real time and performs comparative analysis. Historical data such as pH, turbidity, and pollution levels are statistically stored for 24 hours and continuously for seven days. This enables labor-saving, fully-involved operation of wastewater treatment plants, completely avoiding water quality exceeding standards due to inadequate manual testing. Data and operational status can be remotely monitored anytime, anywhere, eliminating the need for on-site inspections. The automatic dosing system 6 precisely controls the amount of chemicals added, reducing manpower and material resources by over 60%.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intelligent chemical dosing system for wastewater treatment plants, characterized in that: include: Wastewater treatment components are used to treat wastewater generated during tunnel construction. Sludge treatment unit for treating separated sludge; An automatic dosing system (6) is used to inject chemicals into the wastewater treatment unit; Water quality monitoring equipment is used to monitor the pH value and suspended solids concentration of tunnel sewage; the water quality monitoring equipment adjusts the dosage of the automatic dosing system (6) through the PLC control system to realize the dynamic treatment of tunnel sewage; The PLC control system collects pH monitoring data and SS monitoring data to control the automatic dosing system (6) to automatically add chemicals and open and close pipeline valves.

2. The intelligent chemical dosing system for wastewater treatment plants according to claim 1, characterized in that, The wastewater treatment components include a grit chamber (1), a sedimentation tank (2), a static wastewater mixer (3), a mud-water rapid separation tank (4), and an automatic coke adsorption filtration device (5) connected in sequence via wastewater pipes. The automatic dosing system (6) is connected to the static wastewater mixer (3) and is used to add chemicals to the static wastewater mixer (3) to react with the wastewater.

3. The intelligent chemical dosing system for wastewater treatment plants according to claim 2, characterized in that, It also includes a backwash discharge assembly, which is located between the automatic coke adsorption filter (5) and the grit treatment tank (1). The backwash discharge assembly includes a backwash discharge pipeline (10) and a high-pressure pump (14). The backwash discharge assembly is used to backwash the sludge in the grit treatment tank (1).

4. The intelligent chemical dosing system for wastewater treatment plants according to claim 3, characterized in that, The PLC control system is configured to control the backwashing assembly to backwash the sedimentation tank (1) according to a preset time cycle.

5. The intelligent chemical dosing system for wastewater treatment plants according to claim 2, characterized in that, The sludge treatment assembly includes a sludge thickening tank (7), which is connected to the grit treatment tank (1) via a first sludge pump pipeline (11). The sludge thickening tank (7) is connected to the sedimentation tank (2) via a second sludge pump pipeline (12). It also includes a filter press (8), which is connected to the sludge thickening tank (7). The sludge is pumped to the sludge thickening tank (7) via the grit treatment tank (1) or the sedimentation tank (2), and after being processed by the filter press (8), it is transported to a landfill for disposal.

6. The intelligent chemical dosing system for wastewater treatment plants according to claim 5, characterized in that, The sludge treatment assembly also includes a sludge drying field (9), which is connected to the grit treatment tank (1) via a first sludge pump pipeline (11). The sludge drying field (9) is connected to the sedimentation tank (2) via a second sludge pump pipeline (12). The sludge settled in the grit treatment tank (1) and the sedimentation tank (2) is pumped into the sludge drying field (9) via the sludge pump pipeline for pressing treatment before being transported to landfill.

7. The intelligent chemical dosing system for wastewater treatment plants according to claim 2, characterized in that, The automatic dosing system (6) includes multiple acid metering pumps (15), multiple PAC metering pumps (16), multiple PAM metering pumps (17), and a chemical agitator. One end of the acid metering pump (15) is connected to the acid tank through a pipe, and the other end is connected to the static wastewater mixer (3) through a pipe. One end of the PAC metering pump (16) is connected to the PAC tank through a pipe, and the other end is connected to the static wastewater mixer (3) through a pipe. One end of the PAM metering pump (17) is connected to the PAM tank through a pipe, and the other end is connected to the static wastewater mixer (3) through a pipe. The chemical agitator is installed in the static wastewater mixer (3). The system also includes a control frequency converter, which is used to provide power to the automatic dosing system (6).

8. The intelligent chemical dosing system for wastewater treatment plants according to claim 2, characterized in that, The water quality monitoring equipment includes an online pH analyzer and an online turbidity analyzer. The online pH analyzer includes several pH sensor probes, which are located at various positions of the static wastewater mixer (3), including near the inlet, in the middle of the mixer, and at the outlet. The online turbidity analyzer includes several SS value sensor probes, which are located at various positions of the static wastewater mixer (3).

9. The intelligent chemical dosing system for wastewater treatment plants according to claim 1, characterized in that, The PLC control system (18) is electrically connected to the water quality monitoring equipment (21) and the automatic dosing system (6), respectively, and sends data parameters to the cloud server through the network transmission module (19).

10. The intelligent chemical dosing system for wastewater treatment plants according to claim 1, characterized in that, The PLC control system is connected to the data analysis platform. The data analysis platform is used to analyze and process the data collected by the PLC control system and feed it back to the PLC control system (18) to dispense the dosage of the automatic dosing system (6). The PLC control system (18) is equipped with an input / output interface (20) for user interaction. The input / output interface (20) includes a touch screen, a display screen, and a keyboard and mouse device. It is used for users to observe the system operation and to set or configure the parameters involved in the processing flow.

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