Data acquisition control system

System Overview:

The data acquisition and control system adopts the mode of upper and lower computers to supervise the chemical water vapor parameters of the sampling device and automatically control the addition of ammonia to the feedwater and phosphate to the boiler water. The upper computer of the system adopts high-performance industrial control computers, and the lower computer can flexibly adopt intelligent modulesPLC， The upper computer and lower computer choose multiple communication methods according to different environments.

A、 Chemical automatic dosing control system

At the bottomAutomatic ammonia addition for water supply (on-site, soft manual operation, automatic)：

in computerReal time display of feedwater conductivity, feedwater pH, feedwater flow rate, and control trend of feedwater pH on LCD, as well as display of the working status of each dosing pump. There are three control modes for ammonia addition to water supply: on-site control, remote automatic control, and remote manual control. When the system is in remote manual control, users can remotely control the start, stop, and adjust the working frequency of the dosing frequency converter of the dosing pump on the computer. When the system is in remote automatic control, the PID mathematical model automatically calculates the dosage based on the actual working conditions and outputs the calculation results to the dosing equipment.

At the bottomThe function of automatically adding phosphate to boiler water (on-site, soft manual operation, and automatic)：

in computerReal time display of furnace water conductivity, pH, and R value trends on the CRT screen, as well as the working status of each dosing pump. The addition of phosphate to boiler water has three control modes: on-site control, remote automatic control, and remote manual control. When the system is in remote manual control, users can remotely control the start, stop, and adjust the working frequency of the dosing frequency converter of the dosing pump on the computer. When the system is in remote automatic control, the PID mathematical model automatically calculates the dosage based on the actual working conditions and outputs the calculation results to the dosing equipment.

B、Data collection of centralized analysis device for soda water sampling

Ødata collectionThe upper computer passes throughRS-485 bus orCommunication and acquisition of chemical instruments using other industrial communication protocols and analog input modules of lower level computers4-20mA output signal and record it in the database.

At the bottomreal-time displayReal time data display including chemical parameters, real-time trend chart display,The data is refreshed every 2 seconds on the LCD interface.

At the bottomReal-time alarmThe upper computer software monitors real-time data of various chemical parameters and provides sound and light alarms based on the alarm limits set by the user.

At the bottomdata processingThe upper computer software saves real-time data of various chemical parameters and real-time alarm records of each chemical parameter.

At the bottomHistorical AlarmsUsers can query alarm history data based on chemical parameter names and time periods, and print them out.

At the bottomhistorical trendUsers can call up trend charts of multiple chemical parameters at any time period and print them out.

At the bottomReport ManagementUsers can query daily, monthly, and annual reports by time and print them out.

At the bottomParameter SettingsUsers can modify and set the range and alarm upper and lower limits of each chemical instrument collection point online.

At the bottomExpert diagnosisAnalyze and troubleshoot critical data reliability, and guide users in handling it.