METHOD AND DEVICE FOR CONTROLLING COKING BED TEMPERATURE OF COKING BED-TYPE SLUDGE MELTING FURNACE

摘要

PURPOSE:To make the temperature of a coking bed uniform by providing a means for detecting the temperature and quantity of molten slag which runs down out of a slag hole and an exhaust gas flow rate regulation means. CONSTITUTION:An exhaust gas fan 5 is rotated at a specified number of rotations while a constant amount of air is blown into a coking bed 2. At the same time, a damper 21 is fully opened or set to a specified opening. If sludge is not molten adequately or a scaffolding phenomenon occurs due to the irregular temperature of the coking bed 2, the temperature of molten slag discharged from a slag hole 3 decreases. However, the drop below the lower limit value of slag temperature is detected by a temperature sensor 20, the opening of the damper 21 is narrowed and the number of rotations of the exhaust gas fan is reduced. Subsequently the exhaust gas amount aspirated from the furnace 1 decreases.