Device for ring section furnace
AssigneeNorsk Hydro a.s.
InventorsGudmund Tokvam, Tormod Naterstad
Life of this patent
Estimating the term…
Abstract
A ring section furnace device for the calcination of carbon bodies includes a number of serially connected chambers with or without lids on top. Each chamber contains a number of cassettes the walls of which have therein vertical and/or horizontal flue gas channels. A flue gas exhaust system from each chamber leads to a main ring duct. The furnace is fitted with an additional, separately attached ring duct, and each of the chambers is fitted with a recovery device in the form of a lid, manifold, or a similar device with a closeable opening or joining pipe, which allows for exhaust removal of the air used for cooling the cassettes through a pipe connection fitted between the additional ring duct and the recovery device on the chamber.
Claims6
In a ring section furnace including a plurality of serially connected chambers, each said chamber having a plurality of pits defined by walls having therein flue gas channels, and a main ring duct exterior of said chambers, whereby a heat treatment operation is conducted serially sequentially within said chambers on respective products to be loaded therein, during which operation each chamber sequentially is heated, during which flue gases therein are exhausted therefrom to said ring duct, and then is cooled by air introduced into said each chamber, during which said air absorbs heat, the improvement comprising:
- each said chamber having an outlet having connected thereat an exhaust device;
- an additional ring duct separate from said main ring duct;
- and
- means for, when a given said chamber is being heated, transferring flue gases exhausted therefrom through said outlet and said exhaust device thereof into said main ring duct, and for, when said given chamber is being cooled, transferring heated air therein to said additional ring duct.
Dependencies are inferred from the claim text.