Method and apparatus for drying gel slabs

Details Method and apparatus for drying gel slabs Method and apparatus for drying gel slabs

F - Mech Eng,Light,Heat,Weapons

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F26B 9/04 (2006.01) F26B 5/04 (2006.01) F26B 7/00 (2006.01) F26B 9/00 (2006.01) G01N 27/447 (2006.01)

Patent

CA 1263230

METHOD AND APPARATUS FOR DRYING GEL SLABS ABSTRACT OF THE DISCLOSURE An apparatus for drying gel slabs supplies heat to a horizontal gel slab from a heating plate above the slab, while drawing a vacuum beneath. The heating plate is weighted and has a flat lower surface at least coextensive with the gel slab. The slab itself is placed on a porous support pad in a vacuum chamber enclosed at the top with a flexible cover which clings to the gel and seals to the perimeter of the chamber when a vacuum is applied from below. The heating plate rests on top of the cover under gravitational force, providing even heat- ing across the entire expanse of the gel slab and for the entire duration of the drying process, resulting in a continuous and uniform vapor flow downward from the gel slab, a minimization of internal stresses, and re- duced susceptibility of the gel to cracking.

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