The boiler drum water level is an important parameter of the furnace for safety operating, and having major impact on the quality of steam-water separation speed. The performances of the boiler drum water level control system are time delay, nonlinear and time variable, so the traditional three impulse control system have defects of large water level fluctuation and false water level. Fuzzy control can effectively adapt to the working conditions of boiler drum water level control system, and its shortcoming is that the control accuracy is low. In the paper, the fuzzy control was introduced in the traditional PID control to improve the control precision and response speed of the drum water level control system, to ensure that the fluctuation range of the water level was maintained within 2% of the set value, and the research results were applied to the actual boiler drum. The research results show that the control system not only improves the control accuracy of water level, but also can save energy and reduce consumption, which has great engineering application value.
Energy For Metallurgical Industry