Heavyoil catalytic cracking and gasoline modifying mutual control method and apparatus

Abstract

The invention relates to the method and the device to adjust and control in heavy oil catalytic cracking and gasoline modified process. It adds the catalyst circular mixer and the regenerative catalyst cooler into the heavy oil catalytic cracking system with the gasoline modified assistant fluidized reactor. So it can lead the future and regenerative catalyst from the gasoline modified assistant fluidized reactor to the mixer and mix uniformly in the water vapour, then the mixture go into the heavy oil reactor riser to crack with the raw oil; the regenerative catalyst used for the gasoline modified is cooled in cooler before going into the assistant fluidized reactor and reacts with the vapour gasoline material. The invention can decrease the gasoline alkene content to 18%(V) and it is proper for the country environment protecting rule but improve the yield of the light oil.

Description

technical field [0001] The invention relates to a catalytic conversion process of petroleum hydrocarbons, in particular to a coupling technology of a catalytic conversion process for reducing olefin content through heavy oil catalytic cracking conversion and catalytic gasoline modification and a device for realizing the process, belonging to the field of petrochemical technology. Background technique [0002] In recent years, with the increasingly stringent environmental protection standards, new gasoline standards have been issued at home and abroad, which put forward strict requirements on the olefin content and sulfur content in gasoline. In China, the new gasoline and diesel standards began to be implemented on July 1, 2003. The olefin content of gasoline is ≯35% (v), and the sulfur content is ≯800ppm; the implementation standard on July 1, 2005 requires gasoline sulfur content≯500ppm; 2007 In 2009, gasoline quality standards in some areas were required to meet Euro III ...

AI Technical Summary

Problems solved by technology

However, these technologies also have the following deficiencies: firstly, the catalyst in the gasoline reforming catalyst and the catalyst in the heavy oil riser have different activities and temperatures, and it takes a certain amount of time for the two to mix uniformly in the heavy oil riser reactor. The inhomogeneity of local catalyst density, activity and temperature in the riser reactor will aggravate the local overcracking and thermal cracking reactions of oil and gas in the riser reactor; the second is to inject gasoline modified catalyst into heavy oil catalytic cracking In the middle and upper part of the riser reactor, although the reaction temperature downstream of the introduction point is reduced, the ratio of solvent to oil downstream of the introduction point is increased, which will cause more secondary cracking reactions to occur downstream of the riser reactor, making light The yield of quality oil decreased, and the yield of cracked gas increased

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