NEW HEAT-RECOVERY COKING TECHNOLOGY

摘要

Classical coking technology, which includes the recovery of chemical by-products and coke-oven gas, is growing rapidly and is advantageous when the coking operation is part of an integrated steel mill. However, with a growing commercial coke market, there is new emphasis on coking technology that does not include by-product recovery. Non-recovery coking technology, which originated in the late 19th century, has been modernized by Uhde GmbH company to incorporate the latest achievements in science and engineering. The result is the new Heat-Recovery coking technology. The coking process (Figs. 1 and 2) begins by charging the chamber with a compacted coal blend. The charge is heated from the bottom, roof, and side walls of the oven. Carbonization begins and the charge releases pyrolysis products. An induced-draft fan and (or) smoke stack maintain a negative pressure in the oven. This causes air to enter the top space in the oven through holes, for example in the doors. Some of the coke pyrolysis gas burns in this space, adding heat to the charge and thereby continuing the pyrolysis processes.