WO2022193737A1 - Intelligent control system and method for circulating cooling water system - Google Patents

Abstract

An intelligent control system and method for a circulating cooling water system. The control system comprises: a data sensing module, a data transmission module, a field display and control module, a cloud analysis and control module, a mobile terminal display and control module, and a power distribution and auxiliary module, wherein the data sensing module collects signals and transmits same to the field display and control module; after being processed, the signals are transmitted to the cloud analysis and control module for comprehensive data analysis and processing, and are then converted into a control signal and a data signal; the control signal is transmitted back to the field display and control module, so as to form an operation record signal, and same is then transmitted back to the mobile terminal display and control module; and the data signal is directly transmitted to the mobile terminal display and control module by means of the data transmission module. The system has the characteristics of being highly automated, being safe and reliable, customization, and mobility; and the refined and intelligent management of a circulating cooling water system can be realized.

Description

An intelligent control system and method for circulating cooling water system technical field

The invention belongs to the technical field of circulating cooling water treatment, and in particular relates to an intelligent control system and method for a circulating cooling water system.

Background technique

The control of circulating cooling water system is a key link related to industrial safety production and energy saving and emission reduction in my country, and it is a delicate and cumbersome systematic work that requires professional water treatment technicians to conduct frequent daily monitoring and take reasonable and effective control measures. . The water quality control work has high requirements on the technical level and the number of on-site technicians. At present, most of the water quality control work of the circulating cooling water system is mainly done manually. The monitoring process is long, the timeliness is poor, and monitoring lags or effects often occur. The bad situation is very unfavorable for the enterprise to make timely and effective adjustments to the circulating cooling water system, is not conducive to the safe and stable operation of the equipment and the overall operation efficiency of the enterprise, and affects the overall effect of water saving and emission reduction.

The existing circulating cooling water system management automation equipment currently only stays at the level of data and signal transmission, which can realize automatic dosing and a small amount of water quality data transmission. However, it does not have the function of controlling the quality of circulating cooling water as a whole, which is mainly reflected in the following four aspects:

1. It does not have the function of actively reducing turbidity and iron, and actively adjusting the concentration multiple of the circulating cooling water system;

2. It does not have the functions of cloud automatic control and trend judgment, and cannot give prompts and early warnings to the corrosion, scaling, and slime growth tendency of the system, and take appropriate intervention measures in advance;

3. It does not have the function of instant alarm and automatic emergency disposal when material leakage occurs in the circulating cooling water system.

4. It does not have the function of real-time water quality management of the clear circulating cooling water system through the mobile terminal of the mobile phone. It can display and actively send data and system estimation, early warning, processing suggestions and other information at any time, and has the functions of automatic adjustment and manual correction in time.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the existing circulating cooling water system control methods, and provide an intelligent control system and method for the circulating cooling water system.

In order to solve the above-mentioned technical problems, the present invention is specifically realized through the following technical solutions:

The present invention is an intelligent control system for a circulating cooling water system, including a data sensing module, a data transmission module, an on-site display and control module, a cloud analysis and control module, a mobile terminal display and control module, and a power supply and distribution and auxiliary module ,in,

The data sensing module includes a water quality data sensing module, a chemical consumption data sensing module and a video signal sensing module, which are used to collect water quality data, chemical consumption data, and video data;

The data transmission module includes a wireless local area network component, a GPRS network module and a WIFI component for transmitting data collected by the data sensing module;

The on-site display and control module includes a portable small control box, a PLC component and a chemical dosing device for on-site display and control;

The cloud analysis and control module at least includes a circulating cooling water system smart water quality cloud platform, a corrosion tendency estimation and control module, a scaling tendency estimation and control module, and a biological slime growth tendency estimation and control module;

The mobile terminal display and control module includes a mobile terminal app and/or a computer terminal web application for intelligent water quality control of the circulating cooling water system for mobile terminal operation;

The power supply and distribution and auxiliary modules include mains power supply and distribution components, self-provided power supply and distribution components, and power supply and distribution components for complementary power supply, and are responsible for supporting the power supply and distribution of all modules;

The data perception module collects water quality signals, chemical consumption signals, and video signals, and transmits them to the PLC component in the on-site display and control module through the data transmission module. After the data is comprehensively analyzed and processed by the control module, it is converted into a control signal and a data signal. The control signal is transmitted back to the on-site display and control module through the data transmission module to form an operation record signal, which is then transmitted back to the mobile terminal for display and control through the data transmission module. module; the data signal is directly transmitted to the mobile terminal display and control module through the data transmission module.

In the intelligent control system for the circulating cooling water system of the present invention, it is preferable that the data sensing module further includes a water volume data sensing module, which is used to collect the industrial fresh water replenishment flow, unconventional replenishment flow, and clean circulating cooling of the circulating cooling water system. One or more data of drainage flow of water system, circulating cooling water volume, inlet and outlet water of side filter and backwash water, and liquid level of pool.

The present invention is used in the intelligent control system of the circulating cooling water system, further preferably, the data sensing module further comprises an equipment operating state sensing module for collecting equipment operating data.

The present invention is used in the intelligent control system of the circulating cooling water system, and the water quality data sensing module preferably includes a water treatment chemical concentration detection unit, a pH value detector, a conductivity detector, a turbidity detector, a water temperature detector, a calcium One or more of hardness detector, chloride ion detector, sulfate ion detector, residual chlorine detector, alkalinity detector, COD detector, corrosion rate detector, and dirt thermal resistance tester;

The chemical consumption sensing module includes a circulating cooling water system control water treatment chemical storage tank liquid level meter;

The video signal sensing module includes a video monitor at the cooling tower wall of the pool, a video monitor at the side filter monitor and a video monitor at the chemical dosing area.

The present invention is used in the intelligent control system of the circulating cooling water system. Regulator, acidity regulator.

The present invention is used in an intelligent control system of a circulating cooling water system, and the cloud analysis and control module further includes a material leakage judgment and emergency treatment module, a water replenishment amount estimation and control module, and/or a comprehensive operating cost estimation and control module module.

The present invention is used in an intelligent control system of a circulating cooling water system, and the chemical dosing device includes a chemical metering pump, a water treatment chemical storage tank, a liquid level meter, and a water treatment chemical dosing pipeline.

The present invention also provides a method for controlling the water quality of a circulating cooling water system using the above-mentioned intelligent control system, the method comprising the following steps:

The data perception module collects video signals of water quality, chemical consumption, and key positions of the system, and transmits them to the on-site display and control module through the data transmission module. After processing, it is then transmitted to the cloud for analysis and control through the wireless LAN component in the data transmission module. The corrosion tendency prediction and control module of the module, the scaling tendency prediction and control module, and the biological slime growth tendency prediction and control module are used to comprehensively analyze and process the data through the set control methods and judgment rules, and convert them into control signals. and display data signal, in which the control signal is transmitted back to the on-site display and control module through the data transmission module to automatically control the chemical dosing device, and the formed chemical dosing device operation record signal is then transmitted back to the mobile terminal display through the data transmission module And the control module; the display data signal is directly transmitted and displayed on the mobile terminal display and control module through the data transmission module.

In the method for controlling the water quality of a circulating cooling water system by using the above intelligent control system according to the present invention, preferably, in the corrosion tendency estimation and control module, by setting the sum of the calcium hardness and alkalinity of the circulating cooling water and the pH value limit, And set the upper and lower limit of the circulating cooling water chloride ion or sulfate ion control, and the upper and lower limit of the circulating cooling water treatment chemical concentration, and or the upper and lower limit of the circulating cooling water ORP or residual chlorine, and or set the circulating cooling water turbidity and total The upper and lower limits of iron can realize the prediction and control of corrosion tendency;

In the scaling tendency estimation and control module, the scaling tendency estimation and control are realized by setting the upper limit of control of the sum of calcium hardness and alkalinity data of circulating water, the upper limit of pH and or the upper limit of turbidity in the cloud analysis and control module. ;

The biological slime growth tendency estimation and control module is carried out by setting the upper limit set value of the circulating water COD, and or the color change of the position of the circulating cooling pool column, and or monitoring whether slime appears in the hanger by the side filter. judgment and control.

Further preferably, in the method for controlling the water quality of a circulating cooling water system using the above-mentioned intelligent control system, the cloud analysis and control module further includes a material leakage judgment and emergency treatment module, a water replenishment amount estimation and control module, and/or Comprehensive operating cost estimation and control module, including:

In the material leakage judgment and emergency module, judgment and emergency treatment are performed by setting the circulating water COD or the upper limit value of the water quality factor that can characterize the leaked material;

In the water replenishment estimation and control module, the estimated water replenishment amount is obtained by calculating according to the following formula:

Estimated water replenishment = theoretical evaporation water * concentration ratio / (concentration ratio - 1)

The total annual operating cost in the comprehensive operating cost estimation and control module is calculated according to the following formula, the annual operating cost = annual water cost + annual electricity cost + annual chemical cost;

Among them: annual water fee = comprehensive water price for supplementary water (the weighted average should be calculated in case of multiple water sources) * estimated amount of supplementary water.

Compared with the traditional circulating cooling water monitoring system and method, the intelligent control system and method of the circulating cooling water system of the present invention has the following advantages:

1) It is highly automated, safe and reliable, and has a wide range of applications (select reasonable control parameters and ranges according to different systems), realize refined and customized management of circulating cooling water systems, and stabilize and gradually optimize water quality and concentration multiples. Achieving good treatment effect, saving manpower and water treatment chemical costs, and reducing personnel manipulation errors;

2) Predicting the tendency of corrosion, scaling and biological slime growth in the circulating cooling water system can effectively reduce the hidden dangers of system safety, reduce unnecessary drainage caused by the failure to detect water quality deterioration in the system in time, and prolong the heat exchange equipment and the entire cleaning cycle. The service life of the cooling water system is suitable for circulating cooling water treatment devices of various scales;

3) The material leakage alarm and emergency automatic disposal function of the system can ensure that the water system can deal with the abnormal situation of material leakage in time, and reduce the fresh water supply and drainage volume under this abnormal situation;

4) The mobile terminal application set up can enable managers at different levels of the clean circulating cooling water system to keep abreast of the system status and automatic disposal actions.

Description of drawings

Figure 1 is a schematic diagram of the composition of the circulating cooling water intelligent control system.

Detailed ways

The technical solutions of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 , the intelligent control system used in the circulating cooling water system of the present invention includes a data sensing module, a data transmission module, an on-site display and control module, a cloud analysis and control module, a mobile terminal display and control module, and a supply and distribution module. power and auxiliary modules.

The data sensing module collects water quality, video and other data and transmits it to the PLC component in the on-site display and control module through the data transmission module. After processing, it is then transmitted to the cloud analysis and control module through the wireless LAN component in the data transmission module for comprehensive data analysis. After processing, it is converted into control signal and data signal, wherein, the control signal is transmitted back to the on-site display and control module through the data transmission module to control the chemical dosing device to form the operation record signal and then transmit it back to the mobile terminal through the data transmission module for display and control. Control module; the data signal is directly transmitted to the mobile terminal display and control module through the data transmission module and displayed.

The data sensing module includes a water quality data sensing module, a water quantity data sensing module, a chemical consumption data sensing module, a video signal sensing module and an equipment operating status sensing module, which are used to collect water quality data, water quantity data, chemical consumption data, video data, equipment Running state data; the water volume data sensing module and the equipment running state sensing module are not required modules.

The data transmission module includes wireless local area network components, GPRS network modules and WIFI components, between the data perception module and the on-site display and control module, between the on-site display and control module and the cloud analysis and control module, and between the cloud analysis and control module and the mobile terminal display and control module The type of data transmission module used for data or signal transmission between modules is selected according to the environment where the modules are located and data transmission requirements.

On-site display and control modules include portable small control boxes, PLC components and chemical dosing devices for on-site display and control.

The cloud analysis and control module includes at least the intelligent water quality cloud platform of the circulating cooling water system, the corrosion tendency prediction and control module, the scaling tendency prediction and control module, the biological slime growth tendency prediction and control module; as shown in Figure 1, also Including material leakage judgment and emergency treatment module, water replenishment estimation and control module, and/or comprehensive operating cost estimation and control module.

The mobile terminal display and control module includes a mobile terminal app and/or a computer terminal web application for intelligent water quality control of the circulating cooling water system for mobile terminal operation.

The power supply and distribution and auxiliary modules include mains power supply and distribution components, self-provided power supply and distribution components, and power supply and distribution components for complementary power supply, ensuring the power consumption of all modules of the intelligent control system.

As shown in Figure 1, the present invention is used for the method for the intelligent control system of the circulating cooling water system to control the water quality of the circulating cooling water system, and the specific control process is as follows:

The data perception module collects water quality, water quantity, chemical consumption, video signals at key positions of the system, and equipment operating status data, and transmits the above data to the on-site display and control module through the data transmission module. After processing, it passes through the data transmission module. The wireless LAN components in the cloud are transmitted to the cloud analysis and control module. The quantity estimation and control module and the comprehensive operating cost estimation and control module perform comprehensive data analysis and processing through the control methods and judgment rules set by them, and convert them into control signals and display data signals, wherein the control signals are transmitted back through the data transmission module. The on-site display and control module automatically controls the chemical dosing device, and the formed chemical dosing device operation record signal is transmitted back to the mobile terminal display and control module through the data transmission module; the display data signal is directly transmitted through the data transmission module. Go to the mobile terminal display and control module and display it.

In the above control process, the corrosion tendency prediction and control module realizes the corrosion tendency prediction and control through the following judgment methods:

1) Real-time monitoring of the sum of calcium hardness and alkalinity of circulating cooling water:

The calcium hardness and alkalinity data are detected and sensed by the calcium hardness detector and alkalinity detector in the data sensing module, and uploaded to the PLC component in the field display and control module in real time through the wireless LAN component in the data transmission module, and then through the wireless LAN component in the data transmission module. The WIFI component in the data transmission module is transmitted to the cloud analysis and control module, where data analysis and processing are performed, and the sum of the calcium hardness and alkalinity of the circulating cooling water and the pH value limit are set. When the set value is lower than the lower limit, an alarm signal will be issued and an alarm signal will be issued to indicate that the corrosion tendency of the system is intensified. The system will automatically display the pre-set operation suggestion signal and other display data signals, which are displayed on the mobile terminal display and control module. Smart water quality control mobile phone for circulating cooling water system In the terminal app and/or computer terminal web application, the on-site display and control module and the cloud analysis and control module analyze the start-stop signal to send the start-stop signal to the hardness regulator or pH regulator working pump through the data transmission module;

The chloride ion concentration and/or sulfate ion concentration are sensed by the chloride ion detector and/or sulfate ion detector in the data sensing module, and uploaded to the PLC component in the field display and control module in real time through the wireless local area network component of the data transmission module. Then, it is transmitted to the cloud analysis and control module through the WIFI component in the data transmission module, where data analysis and processing are carried out, and data analysis and processing are carried out here. The circulating cooling water chloride ion or sulfate ion exceeds the upper limit control set value, An alarm signal is issued to indicate that the corrosion tendency of the system is intensified, and the system automatically displays operation suggestions. The mobile terminal display and control module of the circulating cooling water system intelligent water quality control In the mobile phone app and/or computer web application, the on-site display and control module and the cloud The start-stop signal analyzed by the analysis and control module sends the start-stop signal to the hardness regulator working pump, pH regulator working pump, stop corrosion and scale inhibitor working pump, sterilization algae and biological slime dispersant through the data transmission module. One or more of a working pump, a filter aid dosing pump or a hardness regulator, or an alkalinity regulator working pump.

2) The system monitors the concentration of corrosion and scale inhibition water treatment chemicals in circulating cooling water in real time:

The concentration of water treatment chemicals is sensed by the water treatment chemical concentration sensor in the data sensing module, uploaded to the PLC component in the field display and control module in real time through the wireless LAN component of the data transmission module, and then transmitted through the WIFI component in the data transmission module. Go to the cloud analysis and control module, perform data analysis and processing here, and perform data analysis and processing here. When the concentration of circulating cooling water treatment chemicals exceeds the upper and lower limit set values of its control, it will be displayed on the mobile terminal display and control module In the intelligent water quality control of the circulating cooling water system in the mobile phone app and/or the web application on the computer, the start-stop signal analyzed by the on-site display and control module and the cloud analysis and control module sends the start-stop signal to the corrosion inhibitor through the data transmission module Antiscalants control the pump, the start and stop signals of the pump are sent back to the on-site display and control module and the cloud analysis and control module, and the circulating cooling water system in the mobile terminal display and control module is displayed synchronously. Smart water quality control mobile app and/or computer web application.

3) The system monitors the circulating cooling water ORP or residual chlorine monitoring value in real time:

The ORP and/or residual chlorine of the circulating water is sensed by the ORP tester and/or residual chlorine tester in the data sensing module, and uploaded to the PLC component in the field display and control module in real time through the wireless LAN component of the data transmission module, and then passed through the data transmission module. The WIFI component in the device is transmitted to the cloud analysis and control module, where data analysis and processing are performed, and data analysis and processing are performed here. Circulating cooling water system smart water quality control in the terminal display and control module In the mobile phone app and/or the computer web application, the start and stop signals analyzed by the on-site display and control module and the cloud analysis and control module are sent through the data transmission module. The stop signal is sent to the control pump for bactericidal algicide and bio-slime dispersant, and the start-stop signal of the pump is sent back to the on-site display and control module and the cloud analysis and control module, and the circulating cooling water in the display and control module of the mobile terminal is displayed synchronously. System smart water quality control mobile app and/or computer web application.

4) The system monitors the circulating cooling water turbidity and total iron monitoring value in real time:

The turbidity of the replenishing water and circulating water is sensed by the turbidity sensor in the data sensing module, uploaded to the PLC component in the field display and control module in real time through the wireless LAN component of the data transmission module, and then transmitted to the cloud through the WIFI component in the data transmission module. Analysis and control module, data analysis and processing are carried out here, and data analysis and processing are carried out here. When the turbidity of replenishment and circulating water exceeds the upper and lower limit set values of its control, an alarm signal will be issued, which will be displayed on the mobile terminal display and control module In the intelligent water quality control of the circulating cooling water system in the mobile app and/or the web application on the computer, the start-stop signal analyzed by the on-site display and control module and the cloud analysis and control module sends the start-stop signal to the filter aid through the data transmission module The pump control pump, the start and stop signal of the pump is sent back to the on-site display and control module and the cloud analysis and control module, and the circulating cooling water system in the mobile terminal display and control module is displayed synchronously. Smart water quality control mobile app and/or computer in web applications.

The fouling tendency prediction and control module realizes the fouling tendency prediction and control through the following methods:

The calcium hardness and alkalinity data are sensed by the calcium hardness detector, alkalinity detector, pH meter, and turbidity meter in the data perception module, and uploaded to the on-site display and control module in real time through the wireless LAN component of the data transmission module. The PLC component is then transmitted to the cloud analysis and control module through the WIFI component in the data transmission module, where data analysis and processing are performed, and data analysis and processing are performed here. The sum of the calcium hardness and alkalinity data of the circulating water exceeds its control. The upper limit set value, and or the pH exceeds the upper limit set value, and or the turbidity exceeds the upper limit value, an alarm signal is issued, indicating that the scaling tendency of the system is intensified, and the system automatically displays the operation suggestion, which is displayed in the mobile terminal display and control module. In the smart water quality control of the circulating cooling water system in the mobile app and/or the web application on the computer, the start-stop signal analyzed by the on-site display and control module and the cloud analysis and control module sends the start-stop signal to the acidity regulator via the data transmission module The pump and/or filter aid control the pump, and the start and stop signals of the pump are sent back to the on-site display and control module and the cloud analysis and control module, which are simultaneously displayed on the mobile terminal display and control module. Smart water quality control mobile phone app and/or computer-side web applications.

The biological slime growth tendency prediction and control module realizes the prediction and control of the biological slime growth tendency through the following methods:

Through the COD tester in the data sensing module and/or the signal of the video analysis system to sense the COD of the circulating water and/or the color change of the column position of the circulating cooling pool, and/or the side filter to monitor whether there is sticky mud in the hanger, via the wireless of the data transmission module The local area network component is uploaded to the PLC component in the on-site display and control module in real time, and then transmitted to the cloud analysis and control module through the WIFI component in the data transmission module, where data analysis and processing are performed, and data analysis and processing are performed here. The COD exceeds the upper limit set value of its control, and/or the color of the column position of the circulating cooling pool changes, and/or there is slime in the side filter monitoring hanger, an alarm signal is issued, indicating that the biological slime breeding tendency of the system is intensified, and the system automatically displays the operation. It is suggested that the smart water quality control mobile phone app and/or computer web application of the circulating cooling water system displayed in the mobile terminal display and control module, the start and stop signals analyzed by the on-site display and control module and the cloud analysis and control module via The data transmission module sends the start-stop signal to the working pump for sterilization and algae killing and/or biological slime dispersant, and the start-stop signal of the pump is sent back to the on-site display and control module and the cloud analysis and control module, which are simultaneously displayed on the mobile terminal display and control module The intelligent water quality control of the circulating cooling water system in the mobile app and/or the computer web application.

The operation methods of the material leakage judgment and emergency treatment module include:

Through the COD detector in the data sensing module or the water quality factor detector that can characterize the leaking material, the circulating water COD or the water quality factor data that can characterize the leaking material are sensed, and uploaded to the on-site display and control module in real time through the wireless LAN component of the data transmission module The PLC component in the middle of the data transmission module is then transmitted to the cloud analysis and control module through the WIFI component in the data transmission module, where data analysis and processing are performed, and data analysis and processing are performed here. Alarm signal, there may be material leakage in the system, leading to aggravation of corrosion tendency or other related key trends, the system automatically displays operation suggestions, which are displayed on the mobile terminal display and control module. Smart water quality control mobile phone app and/or computer for circulating cooling water system in the control module end web application. Set the emergency disposal material leakage procedure corresponding to the start-up system. The start-stop signal analyzed by the on-site display and control module and the cloud analysis and control module sends the start-stop signal to the sterilization and algae killing, biological slime dispersant, auxiliary The start-stop sequence and start-stop time of the filter working pump, the start-stop signal of the pump is sent back to the on-site display and control module and the cloud analysis and control module, and the circulating cooling water system smart water quality in the mobile terminal display and control module is displayed synchronously. Control the mobile app and/or the computer web application.

The method of water replenishment estimation and control module operation includes:

In order to ensure a reasonable system concentration ratio of each circulating cooling water system, the drainage is not automatically controlled, and the system concentration ratio is calculated according to the ion (chloride ion) of the same project of replenishment water and circulating cooling water uploaded by on-site monitoring or manually, and displayed on the mobile phone. The intelligent water quality control of the circulating cooling water system in the terminal display and control module is used in the mobile terminal app and/or the computer terminal web application. When its data exceeds a certain range in a short period of time, such as a fluctuation of 30%, it will be counted as an alarm, and the system will prompt the management personnel to pay attention and make inspections to check whether the system is running abnormally;

Estimated water replenishment = theoretical evaporation water * concentration ratio / (concentration ratio - 1)

In the above formula, the theoretical evaporated water is calculated according to Clause 3.3.3 in the standard GB/T50746-2012 Design Specifications for Petrochemical Circulating Water Fields.

The comprehensive operating cost estimation and control module operation methods include:

Connect the water price and electricity price in the cloud analysis and control module, calculate the total annual operating cost according to the following formula, and draw its change curve and display it on the mobile terminal display and control module. Smart water quality control mobile phone app and control module / or in a computer-side web application.

Total annual operating cost = annual water charge + annual electricity charge + annual chemical charge

In the above formula,

Annual water fee = comprehensive water price for supplementary water (the weighted average should be calculated in case of multiple water sources) * estimated amount of supplementary water.

Implementation Case 1

The intelligent control system of the circulating cooling water system is applied in the circulating cooling water system of a steel plant, and the data perception module, data transmission module, on-site display and control module, cloud analysis and control module, mobile terminal display and control module and supply Power distribution and auxiliary module, among which, the cloud analysis and control module applies the corrosion tendency prediction and control module, the scaling tendency prediction and control module, the biological slime growth tendency prediction and control module, the water replenishment prediction and control module module. After 2 months of application, visualized mobile terminal query, early warning, information sending and online operation are realized.

water quality effect

The corrosion inhibition rate of carbon steel reaches ≤0.050mm/a (national standard ≤0.075mm/a);

The corrosion inhibition rate of stainless steel and copper reaches ≤0.003mm/a (national standard ≤0.005mm/a);

Dirt thermal resistance≤1.0x10 ^-4 m ² ·k/w (GB≤3.44x10 ^-4 m ² ·k/w);

Operation effect of circulating cooling water system

Total iron≤1.0mg/L (national standard≤2.0mg/L);

Turbidity≤10NTU (national standard≤20NTU);

The concentration ratio has increased from 2.1 times to 2.7 times, reducing water consumption by 40% compared with the same period of previous years.

Implementation case 2

The intelligent control system of the circulating cooling water system is applied in the circulating cooling water system of a chemical plant, and the data sensing module, data transmission module, on-site display and control module, cloud analysis and control module, mobile terminal display and control module and power supply module are selected. Power distribution and auxiliary modules, among which, the cloud analysis and control module applies the corrosion tendency prediction and control module, the scaling tendency prediction and control module, the biological slime growth tendency prediction and control module, the material leakage judgment and emergency treatment module, water replenishment estimation and control module, comprehensive operating cost estimation and control module.

After 4 months of application of the system: visualized mobile terminal query, early warning, information transmission and online operation, material leakage early warning and emergency response, and comprehensive operating cost estimation and control.

water quality effect

The corrosion inhibition rate of carbon steel reaches ≤0.040mm/a (national standard ≤0.075mm/a);

The corrosion inhibition rate of stainless steel and copper reaches ≤0.002mm/a (national standard ≤0.005mm/a);

Operation effect of circulating cooling water system

Total iron≤0.7mg/L (national standard≤2.0mg/L);

Turbidity≤10NTU (national standard≤20NTU);

The enrichment ratio has increased from 4.7 times to 5.5 times, which reduces water emissions by 25% compared with the same period of previous years, and reduces the annual comprehensive operation cost by 30%.

Claims (10)

1. An intelligent control system for a circulating cooling water system, characterized in that it includes a data sensing module, a data transmission module, an on-site display and control module, a cloud analysis and control module, a mobile terminal display and control module, and a power supply and distribution and auxiliary module, which,

   The data sensing module includes a water quality data sensing module, a chemical consumption data sensing module and a video signal sensing module, which are used to collect water quality data, chemical consumption data, and video data;

   The data transmission module includes a wireless local area network component, a GPRS network module and a WIFI component for transmitting data collected by the data sensing module;

   The on-site display and control module includes a portable small control box, a PLC component and a chemical dosing device for on-site display and control;

   The cloud analysis and control module at least includes a circulating cooling water system smart water quality cloud platform, a corrosion tendency estimation and control module, a scaling tendency estimation and control module, and a biological slime growth tendency estimation and control module;

   The mobile terminal display and control module includes a mobile terminal app and/or a computer terminal web application for intelligent water quality control of the circulating cooling water system for mobile terminal operation;

   The power supply and distribution and auxiliary modules include mains power supply and distribution components, self-provided power supply and distribution components, and power supply and distribution components for complementary power supply, and are responsible for supporting the power supply and distribution of all modules;

   The data sensing module collects water quality signals, chemical consumption signals, and video signals, and transmits them to the PLC component in the on-site display and control module through the data transmission module. After processing, the wireless LAN component in the data transmission module transmits them to After comprehensive analysis and processing of data by the cloud analysis and control module, it is converted into control signals and data signals. The control signals are transmitted back to the on-site display and control module through the data transmission module to form operation record signals, which are then transmitted back to the mobile terminal through the data transmission module. Display and control module; the data signal is directly transmitted to the mobile terminal display and control module through the data transmission module.
2. The intelligent control system for a circulating cooling water system according to claim 1, wherein the data sensing module further comprises a water volume data sensing module, which is used to collect the industrial fresh water replenishment flow, very high flow rate of the circulating cooling water system One or more data in the flow of regular make-up water, the drainage flow of the clear circulating cooling water system, the amount of circulating cooling water, the in and out water flow of the side filter and the in and out water of the backwash water, and the liquid level of the pool.
3. The intelligent control system for a circulating cooling water system according to claim 1, wherein the data sensing module further comprises an equipment operating state sensing module for collecting equipment operating data.
4. The intelligent control system for a circulating cooling water system according to claim 1, wherein the water quality data sensing module includes a water treatment chemical concentration detection unit, a pH value detector, a conductivity detector, and a turbidity detector. One of the instrument, water temperature detector, calcium hardness detector, chloride ion detector, sulfate ion detector, residual chlorine detector, alkalinity detector, COD detector, corrosion rate detector, and dirt thermal resistance tester or more;

   The chemical consumption sensing module includes a circulating cooling water system control water treatment chemical storage tank liquid level meter;

   The video signal sensing module includes a video monitor at the cooling tower wall of the pool, a video monitor at the side filter monitor and a video monitor at the chemical dosing area.
5. The intelligent control system for a circulating cooling water system according to claim 1, wherein the water treatment chemicals are corrosion and scale inhibitor, bactericidal and algaecide, biological slime dispersant, filter aid , hardness regulator, alkalinity regulator, acidity regulator.
6. The intelligent control system for a circulating cooling water system according to claim 1, wherein the cloud analysis and control module further comprises a material leakage judgment and emergency treatment module, a water replenishment amount estimation and control module, and/ Or integrated operating cost estimation and control module.
7. The intelligent control system for a circulating cooling water system according to claim 1, wherein the chemical dosing device comprises a chemical metering pump, a water treatment chemical storage tank, a liquid level meter, a water treatment chemical Product dosing line.
8. A method for controlling the water quality of a circulating cooling water system using the intelligent control system according to claim 1, characterized in that:

   The data perception module collects video signals of water quality, chemical consumption, and key positions of the system, and transmits them to the on-site display and control module through the data transmission module. After processing, it is then transmitted to the cloud for analysis and control through the wireless LAN component in the data transmission module. The corrosion tendency prediction and control module of the module, the scaling tendency prediction and control module, and the biological slime growth tendency prediction and control module are used to comprehensively analyze and process the data through the set control methods and judgment rules, and convert them into control signals. and display data signal, in which the control signal is transmitted back to the on-site display and control module through the data transmission module to automatically control the chemical dosing device, and the formed chemical dosing device operation record signal is then transmitted back to the mobile terminal display through the data transmission module And the control module; the display data signal is directly transmitted and displayed on the mobile terminal display and control module through the data transmission module.
9. The method of claim 8, wherein:

   In the corrosion tendency estimation and control module, by setting the sum of the calcium hardness and alkalinity of the circulating cooling water, the pH value limit, and setting the upper limit of the chloride ion or sulfate ion control of the circulating cooling water, and the circulating cooling water The upper and lower limits of the treatment chemical concentration, and/or the upper and lower limits of the ORP or residual chlorine of the circulating cooling water, and/or the upper and lower limits of the circulating cooling water turbidity and total iron, to realize the prediction and control of the corrosion tendency;

   In the scaling tendency estimation and control module, the scaling tendency estimation and control are realized by setting the upper limit of control of the sum of calcium hardness and alkalinity data of circulating water, the upper limit of pH and or the upper limit of turbidity in the cloud analysis and control module. ;

   The biological slime growth tendency estimation and control module is carried out by setting the upper limit set value of the circulating water COD, and or the color change of the position of the circulating cooling pool column, and or monitoring whether slime appears in the hanger by the side filter. judgment and control.
10. The method according to claim 8, wherein the cloud analysis and control module further comprises a material leakage judgment and emergency treatment module, a water replenishment amount estimation and control module, and/or a comprehensive operation cost estimation and control module ,in:

    In the material leakage judgment and emergency module, judgment and emergency treatment are performed by setting the circulating water COD or the upper limit value of the water quality factor that can characterize the leaked material;

    In the water replenishment estimation and control module, the estimated water replenishment amount is obtained by calculating according to the following formula:

    Estimated water replenishment = theoretical evaporation water * concentration ratio / (concentration ratio - 1)

    The total annual operating cost in the comprehensive operating cost estimation and control module is calculated according to the following formula, the annual operating cost = annual water cost + annual electricity cost + annual chemical cost;

    Among them: annual water fee = comprehensive water price for supplementary water (the weighted average should be calculated in case of multiple water sources) * estimated amount of supplementary water.

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