Catalytic cracking method and device

• Main Authors: MA WENMING, ZHU GENQUAN
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2023
• 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 invention relates to a catalytic cracking method and device.The method comprises the steps that firstly, a high-temperature regenerated catalyst and a low-temperature cooling medium are subjected to heat exchange treatment, and a low-temperature regenerated catalyst and a high-temperature cooling medium are obtained; then, contacting the obtained low-temperature regenerated catalyst with a catalytic cracking raw material to reduce the contact temperature of an oil agent, inhibit the thermal cracking reaction of the catalytic cracking raw material and reduce the yields of dry gas and coke; meanwhile, the obtained high-temperature cooling medium is divided into a plurality of strands to be fed into different parts of the reactor, so that on one hand, heat of the regenerated catalyst can be recycled, on the other hand, hydrocarbon partial pressure in the reactor can be reduced, and on the other hand, the temperature distribution condition in the reactor can be improved, so that the temperature distribution o