PROCESS AND APPARATUS FOR THE PRODUCTION OF OLEFINS FROM BOTH HEAVY AND LIGHT HYDROCARBONS

摘要

Process and apparatus for cracking light hydrocarbon feedstock and heavy hydrocarbon feedstock in a combined system. …The light hydrocarbon feedstock is completely cracked while the heavy hydrocarbon feedstock is partially cracked with a low steam content. The completely cracked light hydrocarbon and the partially cracked heavy hydrocarbon are then combined, wherein the light hydrocarbon serves as a diluent and provides heat for further cracking the partially cracked heavy hydrocarbon. Thereafter the heavy hydrocarbon is cracked to completion. …The apparatus includes a furnace having a section suited to partially crack the heavy hydrocarbon feedstock, a section to maximize the conversion of a light hydrocarbon feedstock, and a section to provide discrete regulation of the heat supplied to the common line, in which the light hydrocarbon pyrolysis gas is quenched and the partially cracked heavy hydrocarbon effluent is further cracked to the desired level of conversion.