Baking or drying oven divided into compartments - which are heated by closed loops contg. steam

摘要

Baking or drying ovens, which are divided up into compartments above and below each other are heated by closed loops contg. steam. As both the floor and roof of the ovens must be heated, the heat transfer takes place in each horizontal leg in the form of the latent heat given up by the steam in that leg in condensing to water. The legs are in series so that only one weld is required to close the loop. The lowest section of each loop passes through an oil or gas fired combustion chamber, circulation being by gravity. In some cases, it is desired to maintain different temps. in the roof and floor of each compartment. This is achieved by using to separate loops, one providing the horizontal floor heating legs and the other the horizontal roof heating legs. In this case two separate combustion chambers are used, one for each loop so that the temp. in each loop can be adjusted independently. Each horizontal leg is in series with the next so that the same flow occurs in every leg and consequently the same heat transfer and also the construction is relatively inexpensive as only one closing weld is required.