TEMPERATURE CONTROLLER FOR SLUDGE INCINERATOR

摘要

PURPOSE:To control the state of combustion of sludge to a faster stable state by compensating a reference manipulated variable by the deviation of a furnace temperature and a target temperature by the inclination of change of a previous furnace temperature and turning the manipulated variable into a final manipulated variable and determining a sludge charge target value on the basis of the final manipulated variable. CONSTITUTION:When a temperature detector 6 measures a temperature in a sludge incinerator 1, a reference manipulated variable arithmetic unit 51 compares the current temperature and a predetermined furnace target temperature, and determines a manipulated variable by stages by the magnitude of a deviation. A compensation-quantity arithmetic unit 52 computes the quantity of compensation added to the reference manipulated variable on the basis of the inclination of a change acquired from several furnace measured temperatures. A final charge arithmetic unit 53 adds the quantity of compensation to the reference manipulated variable, and computes a final manipulated variable. Each charge target-value arithmetic unit 54 calculates the quantity of sludge directly charged into the sludge incinerator 1 and the quantity of sludge charged into a sludge drier 3 on the basis of the final manipulated variable, and controls a sludge distributor 21.