Importance

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Abstract

A quenching system and process cool cracked gas from a cracked gas furnace using different raw materials. A cracked gas furnace, a primary quench exchanger and a secondary quench exchanger are connected in series. A transfer line exchanger for a cooling medium of a gas mixture and steam TLE-G/G is arranged and configured as a secondary quench exchanger connected in series to the primary quench exchanger via a gas transfer line. The TLE-G/G has a feed line conveying the cooling medium. The TLE-G/G is connected via a return line to the cracked gas furnace for returning cooling medium preheated in the TLE-G/G. The TLE-G/G is equipped with a pipeline outputting cracked gas that has been cooled down to temperatures ranging from 450° C. to 300° C. for further processing. A compensator is provided at the upper end of the TLE-G/G behind the cracked gas inlet header.

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First Claim