Water quality on-line monitoring and accurate dosing device

Abstract

The invention relates to the technical field of water quality treatment, and discloses a water quality online monitoring and accurate dosing mechanism which comprises a monitoring module, a control module, a dosing module and a feedback regulation module, the monitoring module acquires multiple parameters of water quality in real time and transmits the parameters to the control module; the control module dynamically calculates the dosage based on the deviation between a preset threshold value and a real-time parameter in combination with the water quality volume; the dosing module executes dosing operation through a high-precision metering assembly; and the feedback regulation module monitors water quality parameters after dosing in real time, and transmits the data back to the control module to form closed-loop regulation. The problems that a traditional chemical adding mechanism depends on artificial experience, is low in chemical adding precision and cannot dynamically adapt to water quality changes are solved, accurate chemical adding is achieved through online monitoring and closed-loop control, chemical loss is reduced, and the water quality treatment effect is improved.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring, and in particular to a precise dosing device for online water quality monitoring. Background Technology

[0002] In water treatment scenarios such as wastewater treatment, industrial circulating water maintenance, and drinking water purification, chemical dosing is a core step in ensuring treatment effectiveness, and its accuracy directly affects the water quality compliance rate and treatment costs. Traditional water treatment processes rely primarily on manual experience or simple dosing devices, which have numerous technical limitations.

[0003] Existing chemical dosing devices generally suffer from the problem of monitoring only a single parameter, with most monitoring only indicators such as pH or turbidity. This makes it difficult to comprehensively reflect the water pollution status, resulting in a lack of comprehensive data support for dosing decisions. At the same time, traditional devices lack precise metering components, and the error in estimating the dosage often exceeds ±10%. This can easily lead to overdosing, resulting in resource waste and secondary pollution, or underdosing, leading to substandard water quality and penalties from environmental protection departments.

[0004] Furthermore, traditional dosing systems lack dynamic linkage and control capabilities. When operating conditions such as influent flow rate and pollutant concentration fluctuate, they cannot adjust the dosing dosage in real time, resulting in significant control lag. For special agents such as highly viscous or highly corrosive chemicals, ordinary dosing equipment has poor adaptability and is prone to problems such as pipe blockage and agent contamination, leading to increased equipment maintenance frequency and affecting treatment efficiency. Although some intelligent dosing systems have introduced PLC control, they have not formed a complete closed-loop regulation mechanism, resulting in insufficient feedback regulation accuracy and a lack of remote monitoring and historical data traceability functions, making it difficult to meet the intelligent management needs of modern water quality treatment.

[0005] With increasingly stringent environmental regulations, various industries are demanding greater stability and cost-effectiveness in water treatment. Traditional dosing systems are no longer adequate for the complex and ever-changing water treatment scenarios. Therefore, this invention proposes an online water quality monitoring and precision dosing device to address these issues. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a precise dosing device for online water quality monitoring.

[0007] The water quality online monitoring and precision dosing device provided by this invention adopts the following technical solution:

[0008] A water quality online monitoring and precision dosing system includes:

[0009] The monitoring module is used to collect water quality parameters of the water body to be treated in real time, including at least two of pH value, turbidity, dissolved oxygen content, and pollutant concentration.

[0010] The control module is communicatively connected to the monitoring module, has pre-stored standard threshold ranges for each water quality parameter, receives real-time water quality parameters transmitted by the monitoring module, calculates the deviation between the real-time parameters and the standard thresholds, and dynamically generates a dosing control signal based on the real-time volume of the water body to be treated.

[0011] The dosing module, which is electrically connected to the control module, includes a reagent storage unit, a high-precision metering pump, and a dosing pipeline. The high-precision metering pump adjusts its output flow rate according to the dosing control signal, and accurately injects the reagent in the reagent storage unit into the water body to be treated through the dosing pipeline.

[0012] The feedback adjustment module is communicatively connected to the control module and is set on the water flow path after chemical dosing. It collects water quality parameters of the water after chemical dosing in real time and transmits them back to the control module. The control module dynamically corrects the chemical dosing control signal based on the deviation between the feedback parameters and the standard threshold.

[0013] Preferably, the monitoring module includes multiple sensor components, each sensor component collects a corresponding water quality parameter, and the detection end of the sensor component is provided with an anti-pollution coating, the anti-pollution coating being made of polytetrafluoroethylene.

[0014] Preferably, the control module includes a data processing unit and a dosing calculation unit; the data processing unit performs filtering and noise reduction processing on real-time water quality parameters to remove abnormal data; the dosing calculation unit pre-stores the dosing dosage calculation formula: Q=K×V×ΔC, where Q is the dosing amount, K is the reagent compatibility coefficient, V is the real-time volume of the water to be treated, and ΔC is the deviation value between the real-time pollutant concentration and the standard threshold.

[0015] Preferably, the dosing module further includes a drug stirring unit, which is disposed within the drug storage unit and includes a stirring motor and a stirring paddle. The stirring motor is electrically connected to the control module and starts stirring according to the drug concentration detection signal to ensure uniform mixing of the drug.

[0016] Preferably, the flow rate adjustment range of the high-precision metering pump is 0.1-100L / h, and the flow rate accuracy error is ≤±1%. The outlet end of the dosing pipeline is provided with an atomizing nozzle, which is used to atomize the agent and spray it evenly onto the water body to be treated.

[0017] Preferably, it also includes a volume monitoring module, which is communicatively connected to the control module and is installed on the storage container or flow pipeline of the water to be treated. The volume monitoring module collects the real-time volume of the water through an ultrasonic level meter or an electromagnetic flow meter and transmits it to the control module.

[0018] Preferably, the control module further includes a threshold setting unit and a data storage unit. The threshold setting unit supports users to customize the standard threshold range of each water quality parameter, and the data storage unit records real-time water quality parameters, chemical dosage, and feedback adjustment data, with a storage time of not less than 90 days.

[0019] Preferably, the monitoring frequency of the feedback adjustment module is consistent with the monitoring frequency of the monitoring module, which is 1-5 times / minute. The control module adjusts the dosage proportionally according to the deviation value of the feedback data, with the adjustment range being 0.5%-10% of the current dosage.

[0020] Preferably, it also includes an alarm module, which is electrically connected to the control module. When the real-time water quality parameters collected by the monitoring module exceed the emergency threshold range, or when the remaining amount of chemicals in the dosing module is lower than a preset value, the control module controls the alarm module to issue an audible and visual alarm signal.

[0021] Preferably, the control module also supports remote communication, connecting to terminal devices via an IoT module. Users can view real-time monitoring data and dosing status through the terminal devices, and remotely adjust standard thresholds and dosing parameters.

[0022] In summary, the present invention has at least one of the following beneficial technical effects:

[0023] Through multi-parameter online monitoring and closed-loop adjustment, dynamic and precise control of the dosage is achieved. Compared with traditional manual or fixed-dosage dosing methods, the utilization rate of the chemicals is increased by 20%-30%, and the water quality compliance rate is increased to over 99%. At the same time, the remote monitoring and automatic alarm functions reduce the cost of manual operation. It is suitable for various water treatment scenarios and has broad application prospects. Detailed Implementation

[0024] The present invention will now be described in further detail.

[0025] Example 1:

[0026] I. Overall Structure of the Organization

[0027] The water quality online monitoring and precision dosing mechanism disclosed in this embodiment includes a monitoring module 1, a control module 2, a dosing module 3, a feedback adjustment module 4, a volume monitoring module 5, and an alarm module 6. Each module is connected via wired or wireless communication to form a complete online monitoring-precision dosing-closed-loop adjustment system, suitable for scenarios such as wastewater treatment plants, industrial circulating water systems, and drinking water purification equipment.

[0028] II. Specific Structure and Working Principle of Each Module

[0029] (a) Monitoring Module

[0030] Monitoring module 1 includes a pH sensor 11, a turbidity sensor 12, a dissolved oxygen sensor 13, and a pollutant concentration sensor 14. The detection ends of each sensor are coated with a polytetrafluoroethylene (PTFE) anti-fouling coating to reduce the impact of impurities in the water on monitoring accuracy. The sensors are evenly distributed within the flow pipe of the water to be treated, collecting corresponding water quality parameters in real time at a frequency of 3 times per minute. The data is transmitted to control module 2 via an RS485 communication interface.

[0031] (ii) Volume monitoring module

[0032] The volume monitoring module 5 uses an ultrasonic level gauge, installed on top of the storage tank of the water to be treated, to detect the water level in real time and calculate the real-time volume based on the preset cross-sectional area of ​​the storage tank. If applied to a pipeline flow scenario, it can be replaced with an electromagnetic flow meter to directly collect the water flow rate and integrate it to obtain real-time volume data. The volume data is transmitted to the control module 2 via a wireless communication module, providing basic parameters for calculating the dosage.

[0033] (III) Control Module

[0034] The control module 2 is the core processing unit, which uses an STM32 series microcontroller as the main control chip and integrates a data processing unit 21, a dosing calculation unit 22, a threshold setting unit 23, a data storage unit 24, and a remote communication unit 25.

[0035] The data processing unit 21 receives the raw data transmitted by the monitoring module 1 and uses the Kalman filter algorithm to remove abnormal fluctuation data to ensure the accuracy of the parameters;

[0036] The threshold setting unit 23 allows users to set the standard threshold range (such as pH 6.5-8.5, turbidity ≤5 NTU, etc.) and emergency threshold for various water quality parameters via a touch screen or remote terminal;

[0037] The dosing calculation unit 22 calculates the dosage based on the real-time parameters after treatment and the water volume of the volume monitoring module 5 using the formula Q=K×V×ΔC. The value of K is pre-calibrated and stored in the control module 2 according to the type of agent (such as flocculant, acid-base regulator), and ΔC is the difference between the real-time pollutant concentration and the standard threshold.

[0038] The data storage unit 24 uses an SD card to store historical data, including real-time water quality parameters, chemical dosage, feedback data, etc., with a storage period of 180 days, and supports data export and traceability;

[0039] The remote communication unit 25 uses a 4G or WiFi module to connect with the user's mobile APP or monitoring platform to enable real-time data viewing and remote control.

[0040] (iv) Dosing module

[0041] The dosing module 3 includes a chemical storage tank 31, a chemical stirring unit 32, a high-precision metering pump 33, a dosing pipeline 34, and an atomizing nozzle 35.

[0042] The reagent storage tank 31 is used to store liquid treatment reagents. A liquid level sensor is installed inside the tank to monitor the remaining reagent level in real time and transmit the data to the control module 2.

[0043] The agent stirring unit 32 consists of a stirring motor and a spiral stirring paddle. When the control module 2 detects uneven agent concentration (triggered by a preset time interval or feedback from the concentration sensor), it starts the stirring motor and the stirring speed is 30-60 r / min to ensure uniform agent concentration.

[0044] The high-precision metering pump 33 adopts a plunger-type metering pump with a flow rate adjustment range of 0.1-100L / h and a flow rate accuracy error of ≤±1%. The plunger stroke and frequency are adjusted according to the dosing control signal of the control module 2 to accurately control the output amount of the agent.

[0045] The dosing pipeline 34 is made of corrosion-resistant PVC material, and the atomizing nozzle 35 is installed at the outlet end of the pipeline and set in the mixing area of ​​the water to be treated to atomize the agent into micron-sized droplets to ensure that the agent is fully mixed with the water.

[0046] (v) Feedback Adjustment Module

[0047] The feedback adjustment module 4 has the same structure as the monitoring module 1, including the same type of water quality sensor. It is installed 5-10 meters downstream of the dosing point on the water flow path to ensure the reagent reacts fully with the water before parameter monitoring. The monitoring frequency of the feedback adjustment module 4 is the same as that of the monitoring module 1, at 3 times / minute, transmitting the collected post-dosing water quality parameters back to the control module 2. The control module 2 compares the feedback parameters with the standard threshold. If the deviation exceeds the allowable range (e.g., ±0.2 pH, ±1 NTU turbidity), the dosing dosage is adjusted proportionally by 0.5%-10% of the current dosage, achieving closed-loop precise adjustment.

[0048] (vi) Alarm Module

[0049] The alarm module 6 includes an audible and visual alarm and an SMS alarm module. When the real-time water quality parameters collected by the monitoring module 1 exceed the emergency threshold (such as pH value <5.5 or >9.5), or when the remaining amount of the reagent in the reagent storage tank 31 is less than 10% of the total volume, the control module 2 triggers the audible and visual alarm to issue an alarm and sends an alarm message to the preset contact person through the SMS alarm module to remind them to handle the situation in a timely manner.

[0050] III. Work Process

[0051] After the equipment is started, the monitoring module 1 and the volume monitoring module 5 start synchronously to collect water quality parameters and volume data of the water body to be treated in real time and transmit them to the control module 2.

[0052] The data analysis unit 21 of the control module 2 filters the raw data, and the dosing calculation unit 22 calculates the initial dosing amount according to the preset formula and generates a dosing control signal.

[0053] The high-precision metering pump 33 of the dosing module 3 responds to the control signal and injects the agent in the agent storage tank 31 into the water to be treated through the dosing pipeline 34 and the atomizing nozzle 35. At the same time, the agent stirring unit 32 is started periodically to ensure that the agent is uniform.

[0054] Feedback adjustment module 4 monitors the water quality parameters of the water body after dosing in real time and transmits the data back to control module 2;

[0055] Control module 2 compares the feedback parameters with the standard threshold. If there is a deviation, it dynamically corrects the dosing control signal and adjusts the output flow of high-precision metering pump 33 until the water quality parameters meet the standard.

[0056] Throughout the process, the data storage unit 24 records various data, the remote communication unit 25 synchronizes the data to the terminal device, and the alarm module 6 triggers an alarm in abnormal situations.

[0057] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water quality online monitoring and precision dosing mechanism, characterized in that, include: The monitoring module is used to collect water quality parameters of the water body to be treated in real time, including at least two of pH value, turbidity, dissolved oxygen content, and pollutant concentration. The control module is communicatively connected to the monitoring module, has pre-stored standard threshold ranges for each water quality parameter, receives real-time water quality parameters transmitted by the monitoring module, calculates the deviation between the real-time parameters and the standard thresholds, and dynamically generates a dosing control signal based on the real-time volume of the water body to be treated. The dosing module, which is electrically connected to the control module, includes a reagent storage unit, a high-precision metering pump, and a dosing pipeline. The high-precision metering pump adjusts its output flow rate according to the dosing control signal, and accurately injects the reagent in the reagent storage unit into the water body to be treated through the dosing pipeline. The feedback adjustment module is communicatively connected to the control module and is set on the water flow path after chemical dosing. It collects water quality parameters of the water after chemical dosing in real time and transmits them back to the control module. The control module dynamically corrects the chemical dosing control signal based on the deviation between the feedback parameters and the standard threshold.

2. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The monitoring module includes multiple sensor components, each of which collects a water quality parameter. The detection end of each sensor component is provided with an anti-pollution coating made of polytetrafluoroethylene.

3. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The control module includes a data processing unit and a dosing calculation unit; the data processing unit performs filtering and noise reduction on real-time water quality parameters and removes abnormal data; the dosing calculation unit pre-stores the dosing dosage calculation formula: Q=K×V×ΔC, where Q is the dosing amount, K is the reagent compatibility coefficient, V is the real-time volume of the water to be treated, and ΔC is the deviation between the real-time pollutant concentration and the standard threshold.

4. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The dosing module also includes a drug stirring unit, which is located inside the drug storage unit and includes a stirring motor and a stirring paddle. The stirring motor is electrically connected to the control module and starts stirring according to the drug concentration detection signal to ensure uniform mixing of the drug.

5. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The high-precision metering pump has a flow rate adjustment range of 0.1-100L / h and a flow rate accuracy error of ≤±1%. The outlet end of the dosing pipeline is equipped with an atomizing nozzle, which is used to atomize the agent and spray it evenly onto the water body to be treated.

6. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: It also includes a volume monitoring module, which is communicatively connected to the control module and is installed on the storage container or flow pipeline of the water to be treated. The volume monitoring module collects the real-time volume of the water through an ultrasonic level meter or an electromagnetic flow meter and transmits it to the control module.

7. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The control module also includes a threshold setting unit and a data storage unit. The threshold setting unit supports users to customize the standard threshold range of each water quality parameter. The data storage unit records real-time water quality parameters, chemical dosage, and feedback adjustment data, and the storage time is not less than 90 days.

8. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The monitoring frequency of the feedback adjustment module is consistent with that of the monitoring module, which is 1-5 times / minute. The control module adjusts the dosage proportionally according to the deviation value of the feedback data, with the adjustment range being 0.5%-10% of the current dosage.

9. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: It also includes an alarm module, which is electrically connected to the control module. When the real-time water quality parameters collected by the monitoring module exceed the emergency threshold range, or when the remaining amount of the dosing module is lower than the preset value, the control module controls the alarm module to issue an audible and visual alarm signal.

10. The water quality online monitoring and precision dosing device according to claim 1, characterized in that: The control module also supports remote communication. It connects to terminal devices via an IoT module, allowing users to view real-time monitoring data and dosing status, and remotely adjust standard thresholds and dosing parameters.