FCC FEED INJECTION USING SUBCOOLED WATER SPARGING FOR ENHANCED FEED ATOMIZATION

摘要

Atomization of a high boiling point, hot liquid, such as a hydrocarbon feedoil for a fluid cat cracker, is enhanced by injecting subcooled water into thehot liquid, to form a two-phase fluid of the liquid and steam, upstream of theatomization. The hot liquid is at conditions of temperature and pressureeffective for the injected, subcooled water to vaporize into steam, when thewater contacts it. Typically this means that the hot liquid is hotter and at alower pressure than the water. In an FCC process, the subcooled water issparged into the flowing hot oil in a conduit (34) in a riser feed injector(10). This produces a spray of hot oil in the riser reaction zone (22) inwhich the oil drops are smaller and more uniformly distributed in the spray.