Enhancing operational efficiency of oven trains of ethylene plants by vapor-air decoking of quenching-vaporizing units

0009-3092/13/4901–0086 2013 Springer Science+Business Media New York Results of application of the technology of vapor-air burn-out of coke from the quenching-vaporizing uni t s (QVU) in an EP-300 e thy lene p lan t opera ted by the JSC Tomskne f tekh in (Tomsk Petrochemical LTD), which improves the operational efficiency of pyrolysis oven trains by reducing QVU decoking time, and, consequently, raises the yield of target products are reported. The efficiencies of conventional mechanical cleaning of QVU tubes vis-a-vis the vapor-air decoking process are indicated.