Branching from the bottom floor of the corning section which designates

摘要

PROBLEM TO BE SOLVED: To provide a granulator with which it is possible to make distribution of temperature and distribution of particle size in a direction perpendicular to flow in a fluidized bed more uniform even when the granulator is made bigger in its size and with which it does not cause any drastic increase in consumption energy by blowers and others since air quantity does not increase excessively even when linear velocity in fluidization of air is enhanced sufficiently to assure stability of the fluidized bed and spouted bed.;SOLUTION: The granulator comprises a granulation unit having a bottom floor with a perforated plate as its bottom part, an upper air-supplying pipe for supplying fluidizing air to the bottom floor of the granulation unit, a lower air-supplying pipe, air-spouting pipes, each of which is branched from the lower air-supplying pipe and has an opening in the bottom floor of the perforated plate for jetting the air into the granulation unit, and spray nozzles for spraying a granulation raw material liquid, each of which is provided in a center of an air outlet of the air-spouting pipe. Otherwise the granulator comprises the bottom floor, the air-supplying pipes and the spray nozzles for spraying the granulation raw material liquid, each of which is provided in an opening in the bottom floor of the perforated plate and uses high-pressure atomizing air as an auxiliary gas. In each granulator, the spray nozzles are formed in triangular arrangement.;COPYRIGHT: (C)2009,JPO&INPIT