Oven process with solvent free exhaust

Heating – Processes of heating or heater operation – Continous strip – strand or web passed longitudinally through...

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Details

110204, 432 21, 432 72, F27B 928, F27D 704

Patent

active

042170915

ABSTRACT:
A method of curing a solvent based coating on a strip comprising passing the strip through oven zones, circulating hot gases in the zones to vaporize solvents and entrain them in such gases and cure the coatings, the solvents being released in high volume one zone, and in low volume in another zone, incinerating some of the gases in the zones to oxidize solvent vapors and returning them to the zones, extracting some solvent-rich gases without incineration from the high release zone and distributing them to other zones, incinerating the solvent-rich gases as they are introduced into the other zones to oxidize solvent vapors and discharge high temperature combustion gases in the zones supplying some heat for the zones and reducing solvent vapors, extracting some of the gases from some zones and introducing them into the high solvent release zone to partially replace the gases transferred, the balance being made up by upstream migration of zone gases within said oven, and exhausting some gases to atmosphere.

REFERENCES:
patent: 1947548 (1934-02-01), Fruth et al.
patent: 3984198 (1976-10-01), Birke et al.
patent: 4133636 (1979-01-01), Flynn

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