This project encompassed the design, fabrication, installation and start-up of a new process line for a web coating and curing process line in a clean room environment. This turnkey installation included the web handling equipment, a 4-zone tower flotation oven and an interactive computer control system. The process required gentle handling of a light film product and the demanding service of oven operating temperatures up to 842°F (450°C).
The oven was designed with a hybrid heating system using indirect propane heated make-up air and electrical coil supplemental heat in the final three zones of the oven. The indirect heat is powered by a nozzle burner firing into a recirculating loop, through a plate type heat exchanger. The efficiency of the indirect system exceeds 95% . The make-up air is HEPA filtered and fed to the four oven zones. High temperature filters are provided in the recirculating loop of the first three zones. A cooling zone at the top of the tower cools the web with HEPA filtered outside air prior to it passing over the turn roll. A nozzle retraction system allows the nozzles to be set anywhere from 0.375" to 3.5" apart.