Drying and gas or vapor contact with solids – Apparatus – With automatic control
Patent
1995-07-20
1996-12-03
Bennett, Henry A.
Drying and gas or vapor contact with solids
Apparatus
With automatic control
34636, F26B 2106
Patent
active
055795900
ABSTRACT:
A drying apparatus for a strip of material or web, including a conditioning zone immediately following but fully integrated with the dryer, to lower the bulk temperature of web. The web of material can be introduced to conditioned air which is substantially free of contaminants being evolved from the coating on the web. The temperature of the conditioned air is low enough to absorb heat from the web, effectively lowering the solvent evaporation rate, and can be controlled such that it is greater than the dew point of the contaminants being evolved from the web, thereby mitigating condensation that normally forms and visible vapors that form outside of the dryer enclosure. Pressure control is provided in the conditioning zone so that solvent vapors will not escape and so that ambient make-up air can be regulated as required. Gas seal between the conditioning zone and the dryer prevents hot, solvent vapor laden air from the dryer from escaping into the conditioning zone.
REFERENCES:
patent: 3957187 (1976-05-01), Puigrodon
patent: 4137648 (1979-02-01), Rhodes
patent: 4606137 (1986-08-01), Whipple
patent: 4837902 (1989-06-01), Dischler
patent: 5038495 (1991-08-01), Jacobs et al.
patent: 5333395 (1994-08-01), Bulcsu
Seidl Paul G.
Zagar Steve J.
Baker William L.
Bennett Henry A.
Doster Dinnatia
Leon Craig K.
W. R. Grace & Co.,-Conn.
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