Production of cracked gases from liquid hydrocarbon

Abstract

Abstract 1. IN A PROCESS FOR CRACKING LIQUID HYDROCARBON INTO GASES IN A FLUIDIZED BEED OF SOLID PARTICLES, THE IMPROVEMENT COMPRISING; (A) FORMING A UNITARY FLUIDIZED BED OF SOLID PARTICLES HAVING A CENTRAL ZONE FOR CRACKING A STARTING LIQUID HYDROCARBON TO CRACKED GASES, AN UPPER ZONE FOR QUENCHING SAID CRACKED GASES, AND A LOWER ZONE FOR CRACKING LIQUID HYDROCARBON RECOVERED FROM SAID CRACKED GASES, SAID CENTRAL ZONE COMMUNICATING WITH SAID LOWER ZONE AND SAID UPPER ZONE THROUGH NARROW PASSAGES OR NECK ZONES FORMED THEREBETWEEN; (B) SPRAYING SAID STARTING LIQUID HYDROCARBON AND A FIRST PORTION OF STEAM AS A FLUIDIZING GAS INTO CENTRAL ZONE WHILE PASSING A SECOND PORTION OF STEAM, CRACKED GASES FROM RECOVERED LIQUID HYDROCARBON, HEREINAFTER DESCRIBED, AND ENTRAINED SOLID PARTICLES FROM SAID LOWER ZONE INTO SAID CENTRAL ZONE FROM THE BOTTOM THEREOF THROUGH SAID NARROW NECK ZONE, THEREBY CRACKING SAID STARTING LIQUID HYDROCARBON IN SAID CENTRAL ZONE TO GASES; (C) SPRAYING A LIQUID HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF A SAID STARTING LIQUID HYDROCARBON AND SAID RECOVERED LIQUID HYDROCARBON INTO SAID UPPER ZONE, WHILE PASSING A SECOND GAS MIXTURE COMPRISED OF SAID FIRST AND SECOND PORTIONS OF STEAM, SAID CRACKED GASES AND ENTRAINED SOLID PARTICLES FROM SAID CENTRAL ZONE INTO SAID UPPER ZONE FROM THE BOTTOM THEREOF THROUGH SAID NARROW NECK ZONE, WHEREBY SAID CRACKED GAS MIXTURE IS QUENCHED AND A PORTION OF THE CARBON, TAR AND HEAVY OIL FRACTIONS WHICH ARE CONTAINED IN SAID CRACKED GAS MIXTURE ADHERE TO SAID ENTRAINED SOLID PARTICLES; (D) REMOVING SAID CRACKED GAS MIXTURE FROM SAID UPPER ZONE AND TREATING SAID CRACKED GAS MIXTURE TO SEPARATE SAID CARBON, TAR AND HEAVY OIL FRACTIONS, WHICH COMPRISE THE RECOVERED LIQUID HYDROCARBON, REFERENCED HEREINBEFORE, TO BE FED TO SAID BED, WHILE A PORTION OF SAID ENTRAINED SOLID PARTICLES ARE REMOVED FROM SAID UPPER ZONE AND RECYCLED TO SAID LOWER ZONE; AND (E) FEEDING OXYGEN, SAID SECOND PORTION OF STEAM AS A FLUIDIZED GAS AND SAID RECOVERED LIQUID HYDROCARBON INTO SAID BOTTOM OF SAID LOWER ZONE TO FLUIDIZE SAID SOLID PARTICLES THROUGHOUT AND PARTIALLY BURN SAID RECOVERED LIQUID HYDROCARBON, THEREBY CRACKING SAID RECOVERED LIQUID HYDROCARBON TO SAID CRACKED GASES.

Inventors

• 👤 T Niwa
• 👤 M Kitajima
• 👤 H Kono
• 👤 K Terai
• 👤 S Nakai
• 👤 M Sawada
• 👤 K Ninomiya

Bibliographic Details