Principles of Dry Ice CO2 Blasting
Dry ice pellets cannot remain solid when exposed to atmospheric
pressures and temperatures. When the dry ice pellets penetrate the
contaminant and hit the substrates the friction slows them down and
they begin to warm up. As the pellets warm up, they sublimate (turn
from solid to gas) very rapidly. The expansion forces the
contaminant which is no longer solidly bonded to be removed from the
substrate.
As the dry ice sublimes, there is theoretically a liquid phase of
CO2 formed during the impact process. As both the temperature and
pressure rise rapidly, such a liquid phase would provide very rapid
heat transfer from the coating (far faster than to a solid phase)
and would allow its rapid percolation into cracks and pores, which
would then suffer disruption during gasification.
Cost Reduction
The natural sublimation of dry ice particles eliminates the cost
of collecting the cleaning media for disposal. In addition,
contaminate and collection costs associated with water/grit blasting
or solvent immersion are also eliminated.
Environmental Safety
Carbon dioxide is a non-toxic compound, which meets EPA, FDA and
USDA industry guidelines. By replacing toxic chemical processes with
CO2 blast systems, employee exposure and corporate liability
stemming from the use of dangerous chemical cleaning agents can be
materially reduced or eliminated completely.
Documents
Dry Ice Cleaning - Doc ID:
100256
Dry Ice System - Doc ID: 100174
Dry Ice Cleans Up - Doc ID:
100296
Industrial Cleaning Made Easy
- Doc ID: 100145
Sand-less - Sandblasting -
Doc ID: 100262
Saving hours of labor
intensive cleaning - Doc ID: 100077
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