Catalytic conversion method of double reactor and its device

Abstract

This invention provides a catalytic cracking method, and it will make sure that raw material oil and petroleum react separately in their own demands by using coupling reactors. In order to improve agent-oil ratio, the accelerant with low temperature from petroleum reaction reenters into the pre-upgrading section of raw material oil reaction. It will low the temperature of accelerant of petroleum reaction and improve agent-oil ratio before low temperature accelerant from petroleum reaction recirculating into petroleum reactor before feeding material. The equipment of this catalytic cracker uses coupling reactor, and the accelerant after the reaction of petroleum will be directly send into the pre-promotion section of heavy oil reactivation from petroleum reactor by accelerant transport pipe between the petroleum reactor and heavy oil reactor. The accelerant recirculating pipe designed with petroleum reactor to make part of the accelerant return to petroleum reactor before feeding material. The catalytic cracking equipment is a settling vessel, which will separate the oil gas from different reactor and enter their own fractionating tower to form the program of single settling vessel and coupling fractionating tower to receive pure petroleum upgrading product.

Description

technical field

[0001] The invention belongs to the technical field of catalytic conversion of petroleum hydrocarbons, in particular to a catalytic conversion method and device capable of increasing catalytic cracking yield and improving product quality. Background technique

[0002] Catalytic cracking is an important secondary processing method for petroleum heavy fractions. Especially in China, about 80% of gasoline comes from catalytic cracking units. How to increase the product yield of the catalytic cracking unit and improve the product quality are very important. Conventional catalytic cracking methods and devices use riser reactors, which have obvious deficiencies in the reaction process. First of all, the temperature of the regenerant is high, which limits the ratio of reactant to oil and the preheating temperature of heavy oil; it affects the product yield; in addition, the product quality of the catalytic cracking unit is not ideal, especially the olefin content ...

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