Dravo Corporation

John A Anthes

Joseph Vlnaty

George A Snyder

In the continuous carbonizing and desulfurizing of formcoke produced from coal of relatively high sulfur content, a shaft type reactor receives both formed green compacts and a particulate sulfur acceptor at the top and these descend together through definite preheating, calcining and cooling zones. Highly heated non-oxidizing hydrogen-containing gas is introduced into the reactor at the level between the calcining and cooling zones to flow upward through the reactor and provide the principal, if not the only source of heat for the reactor. At an intermediate level between the calcining zone and preheating zone, a portion of the rising current of gas, comprising both original gas and additional evolved gases is withdrawn from the reactor and part of the gases so withdrawn is burned in a heat exchanger to heat another part to the high temperature required to thus provide the highly-heated hydrogen-containing gas that is introduced into the reactor as described. Gases not withdrawn at the intermediate level carry heat up through the preheating zone, and with evolved gases are removed at the top of the reactor.

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Rosslyn Farms, PA, United States of America

John A Anthes