The dosing system automatically adjusts the wind speed, circulating liquid flow rate and inlet liquid temperature according to the set operation parameters, collects the parameters of inlet and outlet liquid temperature, wind speed, atmospheric pressure, circulating liquid flow rate, wind resistance and liquid resistance, and sends them to the upper computer. The upper computer reads the data sent by each on-site measurement and control unit and calculates the liquid-side heat dissipation and air-side heat absorption according to the corresponding formulas specified in the standard. Usually chemical and physical changes occur in the dosage process, which can be composed of a number of simple tasks for the control of weighing. The process unit includes all production operations and auxiliary operations in batch production, which are processed in accordance with the order and operating parameters specified in the formula, guaranteeing the control of the dosage process without changes in quality.
020-34563445The controller used in the feeding system is a Siemens S7-200 programmable controller with dual CPUs to form a redundant system, and the STEP7MicroWinV4.0SP6 programming software provided by Siemens is used as the human-machine interface to write programs debugging programs, downloading programs, etc. The PC and the PLC experimental machine are connected with a PC/PPI cable to communicate, and the corresponding parameters are Setting. The RS-485 bus is used to connect the PC with PL. It consists of a heating unit, a weighing module, a digital temperature sensor, a data acquisition card and a PC. The digital temperature sensor converts the measured liquid temperature into a digital quantity and transmits it to the PC through the data acquisition card, and the weighing control system converts the real-time volume of the mixed liquid into a digital quantity and transmits it to the PC through the data acquisition card. The monitoring system based on LabVIEW software displays the liquid mixing process in real time.
The temperature heating device applies different temperature signals to the digital temperature sensor by changing the temperature of the liquid, and the data acquisition card collects the temperature signals to the PC, analyzes and calculates the collected data with LabVIEW software, and the final measurement results are displayed on the interface of the Dosage system. The reaction kettle Weighing system carries out real-time monitoring of the liquid mixing process, and collects the measured data to the PC through the data acquisition card, and displays them as the mixing container curve and the product container curve on the interface of the weighing system.
The loading system contains functions such as data acquisition, storage, processing and analysis, display and historical data, etc. The front panel is a graphical user interface, which provides three modules such as liquid mixing, temperature acquisition and system operation module, etc. The liquid mixing module has a mixing container curve and a product container curve, which display the mixing of the two liquids and the weight of the product respectively, and the mixing speed of liquid mixing can be changed by the adjusting valves and pumps. The speed of liquid mixing can be changed by adjusting the valve and pump, and there is a digital display on the liquid mixing container. The temperature acquisition module can set the liquid heating temperature and display the collected temperature data on the mixing temperature curve in real time. The system operation module allows stopping, automatic and manual operation of the liquid mixing and temperature acquisition, and provides help information for operating this monitoring system.
