Model Predictive Control for a Fluidized Bed Incinerator with High Efficient Energy Recovery System

Abstract

This paper describes two recovery steam stabilization systems for a fluidized bed incinerator with a high efficiency energy recovery system based on multivariable MPC (Model Predictive Control). One is able to control superheated steam generation rate, temperature and pressure stably by manipulating a steam flow valve, waste feeder speed and primary air flow into the energy recovery zone, because it takes into consideration the interactions which exist in the steam recovery system. The other is composed of a combustion control system and a recovery steam control system based on multivariable MPC. The combustion control system manipulates the waste feeder speed so as to keep oxygen concentration in the incinerator in an appropriate range. Experimental results for a real fluidized bed incinerator show the usefulness of the proposed method.