In the process of chemical production,in order to reduce the occurrence of hazardous high-temperature equipment operations and safety accidents,a study on the optimization of the control system for the water temperature of the waste heat boiler is conducted,targeting its characteristics such as time-varying and hysteresis.The effects of conventional PID control,fuzzy adaptive PID control and cascade control are compared by modeling and simulation on MATLAB/Simulink platform.It is found that each control scheme has its own advantages and disadvantages.In order to make use of the advanta-ges of each control scheme and reduce its defects at the same time,a compound control scheme is pro-posed to control the system,and the selected controller is combined into a controller by adjusting the weight coefficient of each controller.The response curves of PID control,cascade control,fuzzy control,compound control and S-function compound control system were stable at 230s,300 s,180 s,130 s and 106 s.The S-function compound control has the advantages of fast response,no overshoot and high control precision,which makes the control system safe and stable and effectively improves the waste heat recovery efficiency of Claus sulfur recovery combustion furnace.
关键词
克劳斯硫磺回收/Simulink/余热锅炉水温/权重系数/S-函数复合控制器
Key words
Claus sulfur recovery/Simulink/waste heat boiler water temperature/weight coefficient/S-function composite controller
维普
万方数据