Patent ID: 8197729
Filing Date: 2012-06-12
Classification: B01J,Y10T

Abstract:
1. A method of granulating granules, comprising the steps of: providing a rectangular granulation unit comprising a bottom floor with a perforated plate as its bottom part, an upper air-supplying pipe for supplying a fluidizing air to the bottom floor of the granulation unit, a lower air-supplying pipe, air-supplying pipes branched from the lower air-supplying pipe and having openings provided in the bottom floor of the perforated plate for jetting air into the granulation unit, and spray nozzles for spraying a granulation raw material liquid in a molten solution or slurry state, with said spray nozzles being provided in the bottom floor in triangular arrangement and being provided in the center of air outlets of the air-supplying pipes; feeding nuclei into the granulation unit through a nuclei feed inlet; and spraying the nuclei in the granulation unit with the granulation raw material liquid from the spray nozzles to form granules, wherein the perforated plate has openings inclined so that a flow direction of the fluidizing air passing through said openings is inclined by an angle towards the vertical axis from a granule flow direction towards a side of the granulation unit opposite to the nuclei feed inlet, when nuclei fed into the granulation unit are granulated with the granulation raw material liquid sprayed from the spray nozzles.