| 摘要 |
<p>A method of operating a strip curing oven for curing a solvent based coating on a strip passing therethrough and comprising passing the strip continuously through sequential oven zones, continuously heating and circulating gases in said zones to vapourize solvents in said coating and entrain them in such gases and cure said coatings, said solvents being released in high volume in at least one of said zones, and being released in low volume in another of said zones, continuously incinerating some of said gases in said zones to oxidize solvent vapours therein and returning same directly to said zones, continuously extracting some solvent rich gases without incineration from said high release zone and distributing them to other said zones, continuously incinerating said solvent rich gases as they are introduced into said other zones to oxidize said solvent vapours and discharge high temperature combustion gases in said zones thereby supplying at least part of the heat requirement for said other zones and maintaining same substantially free of solvent vapours, continuously extracting some of said gases from some said other zones and introducing them into said high solvent release zone to partially balance said solvent rich gas transfer the balance being made up by upstream migration of zone gases within said oven, continuously introducing fresh air to maintain efficient incineration of said solvent vapours, and, continuously extracting some of said solvent free gases from said other zones and exhausting them directly to atmosphere without incineration, and apparatus for carrying out the method aforesaid.</p> |
