Electrical heater controller to regulating temperature on reactor in sasol solvents AAA plant

Since 2002 AAA plant has been struggling to control the temperature on reactor RE1002, with 96 cartridges heaters, 525VAC with a power of 12kW each. In order to guarantee the desired heat transfer supplied by the electrical heater, a multiple PI control technique is proposed. And Numerical simulations are carried out to show the effectiveness of the control technique. A Switch-mode power supplies (SMPS) are inherently nonlinear and time-varying systems. The controller should provide a good level of robustness in spite of large input voltage, output current and parameter variations. [1]. The temperature will be controlled from 0–360°C from a DCS set point which range between 4–20mA the existing control/monitoring system is Honeywell which will allow us to extract data and analyse the performance of the HTS-1003 heaters and other plant parameters. The electrical heaters HTS-1003 will be controlled by the electrical heater controller that will be designed on this project which will get command from DCS.