Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1982-04-28
1984-10-09
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 32, 34 47, 34 54, 34 77, F26B 304
Patent
active
044752938
ABSTRACT:
A chamber such as a curing oven or drier is inerted during the curing of solvent borne resin coatings with the solvent vapor formed therein being withdrawn together with inert gas at a substantially constant flow rate. The withdrawn gas stream is supplied to a condensation unit to enable recovery of solvent and the noncondensed gas discharged from the condensation unit is returned to the oven at a flow rate which may be varied so as to maintain a material balance with respect to the oven atmosphere. Appropriate adjustments are made in response to changes occurring in the oven solvent vapor and/or oxygen concentration without disturbing the material balance mentioned above while the oven atmosphere is withdrawn at a substantially constant flow rate. A plurality of ovens may be connected to a single condensation unit and upon detecting undesired conditions such as excessive oxygen levels in one oven, the same may be separately isolated from the condensation unit.
REFERENCES:
patent: 2746168 (1966-05-01), Rickabaugh
patent: 3909953 (1975-10-01), Hemsath et al.
patent: 4150494 (1979-04-01), Rothchild
patent: 4150495 (1979-04-01), Stern
patent: 4337582 (1982-07-01), Smith
Cassett Larry R.
Rae David L.
Schwartz Larry I.
The BOC Group Inc.
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