| 摘要 |
<p>An improved process and apparatus for chilling and plasticizing fatty materials, particularly lard, shortening and margarine. The molten fat which generally is at 54 to 60 DEG C (130-140 DEG F) is delivered to a feed pump (12) which pumps the molten fat into and through a scraped surface heat exchanger (14). As normally done, approximately 5-25% by volume of air or inert gas is injected into the molten fat on the suction side of the feed pump, to cause the plasticized fat to be white and opaque, rather than translucent. The molten fat is cooled from 54 to 60 DEG C (130-140 DEG F) to approximately 21 to 30 DEG C (70-86 DEG F) in the heat exchanger, and is partially crystallized. The cooled, partially crystallized product from the heat exchanger passes directly through a crystallizing element (18) where it is subjected to sufficient shearing forces to form a fine crystal structure. From the crystallizing element, the cooled, plastic product goes directly to a filler (20).</p> |
