Catalytic cracking device and method for increasing yield of low-carbon olefins

• Main Authors: SON SE-WON, MENG FANDONG, WU LIXIAN, ZHANG RUIFENG, ZHANG YAXI, YAN HONGFEI, YANG XIN
• Format: Patent
• Language: Chinese; English
• Published: 30.12.2022
• Subjects: CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The catalytic cracking method comprises the following steps: introducing a heavy oil raw material into a heavy oil riser reactor of a catalytic cracking device, and introducing a heavy oil cracking catalyst with carbon deposit into a first regenerator for regeneration; the light hydrocarbon raw material enters a light hydrocarbon riser reactor of the catalytic cracking device, and the carbon-deposited light hydrocarbon cracking catalyst is subjected to steam stripping and then enters a second regenerator for regeneration; introducing primary regeneration main air into the first regenerator to perform oxygen-deficient regeneration on the heavy oil cracking catalyst to be regenerated, introducing carbon monoxide-containing primary regeneration flue gas generated in the first regenerator into the second regenerator, and performing oxygen-enriched regeneration on the light hydrocarbon cracking catalyst to be regenerated in the second regenerator; and performing on-line analysis on primary regenerated flue gas com