Carbon dioxide snow agglomeration and acceleration

Details Carbon dioxide snow agglomeration and acceleration Carbon dioxide snow agglomeration and acceleration

1990-07-02

1992-06-30

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Using solid work treating agents

134 93, 425 7, B08B 700

Patent

active

051259796

ABSTRACT:
A cleaning process involving expanding carbon dioxide from an orifice into a thermally insulated chamber to form small carbon dioxide particles, retaining the small carbon dioxide particles in the insulating chamber until the small carbon dioxide particles agglomerate into large snowflakes, entraining the large snowflakes in a high velocity vortex of inert gas to accelerate the large snowflakes and directing a stream of the inert gas and accelerated large snowflakes against the surface of a substrate to be cleaned. This process may be carried out with apparatus including means to direct a stream of small carbon dioxide snow particles into an expansion chamber, means to agglomerate the small carbon dioxide particles into large carbon dioxide snowflakes in the expansion chamber, and means to accelerate the large snowflakes with a high velocity inert gas stream.

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