Patent ID: 7765813
Filing Date: 2010-08-03
Classification: C04B

Abstract:
1. An apparatus for cooling and de-steaming hot and steamy calcined stucco powder, including: a housing defining a plenum, the housing having vertical sidewalls; an inlet for allowing stucco powder into the plenum; an outlet for allowing the stucco powder out of the plenum; a fluidization pad in a lower portion of the plenum in fluid connection with the plenum and directed to blow air vertically upwardly through said stucco to produce an air fluidized bed comprising the stucco powder and air within the plenum; and a water spray device positioned within the plenum for spraying water for cooling the stucco within the plenum, wherein the water spray device includes a rotatable assembly for in the plenum, said assembly for receiving water and spraying water as the rotatable assembly rotates, wherein the plenum has an absence of cooling coils, wherein the rotatable assembly has an orifice, wherein the stucco outlet is at an upper portion of the plenum and the water spray device is at a height between a height of the fluidization pad and a height of the stucco outlet.