Fuzzy self-tuning PID temperature control for biomass pyrolysis fluidized bed combustor

Bed temperature is an important parameter in biomass pyrolysis circulating fluidized bed combustion control system, which is the key to economic operation, but the circulating fluidized bed boiler is a distributed parameter, nonlinear, time-varying, big delay, multiple variables control objects, traditional PID control process responding slowly, has high high-volume overshoot, but it is difficult to reach the desired properties of biomass pyrolysis control systems. Based on the site operator´s experience and expert knowledge, the fuzzy self-tuning PID is applied to fluidized bed temperature control, and simulation shows that this method has a good control performance, technological requirements can be fulfillled.