PURPOSE: To develop a method for controlling the temperature distribution inside a drier, which is for achieving a desirable value with respect to the quality of a processed powder material such as carbon black, and obtain a method and device for the drying which enable operating the drier with the temperature distribution therein in a stabilized state over a long time.
CONSTITUTION: Into a granulator 3 carbon black is fed through an entry 1 and water, through an entry 2; the granulated carbon black is fed by a line 4 into a cylindrical rotary drier 5 for the drying; the processed carbon black is discharged by a line 6. On the basis of the temperatures inside the drier 5 measured by a plurality of thermometers 10 a combustion controller 13 performs operation to calculate the time of change of the processing of the powder and granular material from the constant-rate drying to the decreasing-rate drying; with the time of change and the temperature of the powder and granular material at the outlet of the drier as controlled variables the flowrates of fuel fed by lines 7, 8 respectively to burners 9 for the 1 upstream half of the drier 5 and those for its downstream half are controlled to regulate the amounts of heat so that the drier 5 can be operated with the temperature distribution with respect to the powder and granular material therein in a stabilized state over a long time.
NUMATA MOTOMIKI
NISHIZAWA ATSUSHI
KAMATA TOMIYUKI
