CAT CRACKING OIL FEED INJECTOR DESIGN

摘要

1357220 Cracking ESSO RESEARCH & ENG CO 14 July 1971 [12 Aug 1970] 32973/71 Heading C5E The feed is injected into a catalytic-cracking zone in the form of atomized droplets of diameter less than 350 microns at an exit velocity of at least 100 ft. sec.-1 relative to the catalyst by concurrently feeding steam to the injection zone in a volumetric ratio of steam to liquid hydrocarbon in the range 3 to 75. In this way, the pressure drop across the injection zone may be kept below 50 lb. in.-2 The cracking zone may be a transfer-line reactor, a dense-bed riser or a fluidized-bed reactor. The feed may be preheated, and on injection evaporates rapidly without direct contact between liquid feed and hot catalyst.