Fluid catalytic cracking oil and gas separation and steam stripping equipment and method

Abstract

The invention relates to fluid catalytic cracking oil and gas separation and steam stripping equipment. The equipment comprises an inertia separator, a pre-stripper, a first-stage cyclone separator, a second-stage cyclone separator, a first stripper and a second stripper, wherein the inertia separator is positioned in the pre-stripper; the gas phase outlet of the pre-stripper is connected with the inlet of the first-stage cyclone separator; diplegs of the first-stage and second-stage cyclone separators extend into the first and second strippers respectively; the gas phase outlets of the first-stage cyclone separator, the first stripper and the second stripper are connected with the inlet of the second-stage cyclone separator; and the first stripper is connected with the pre-stripper and the second stripper through catalyst pipelines respectively. A fluid catalytic cracking oil and gas separation and steam stripping method comprises the following steps of: separating reaction oil gas from a catalyst by using the inertia separator; stripping the catalyst by using the pre-stripper, the first stripper and the second stripper in turn and feeding the stripped catalyst into a regenerator; separating all reaction oil gas in the first-stage cyclone separator; and feeding an obtained gas phase and the gas phase obtained by every stripping into the second-stage cyclone separator for separating. In the equipment and the method, the reaction oil gas can be rapidly led out of a device and gas-phase hydrocarbons carried in particle gaps of the catalyst are stripped and led out rapidly, so that internal coking tendency of the device is reduced.

Description

technical field [0001] The invention relates to equipment and technology in catalytic cracking process. More specifically, the liquid catalytic cracking oil and gas separation and stripping equipment and method are used to increase the yield of liquid products, reduce the coke yield and reduce the tendency of coking inside the settler. Background technique [0002] The development of rapid separation technology in the riser outlet area has always been one of the important goals of riser reactor research, because the rapid separation device in the riser outlet area has two main functions. , quickly separated from the catalyst, avoiding the thermal cracking reaction, thereby increasing the yield of the target product; the second is to minimize the catalyst being carried out with the oil and gas, and reduce the particle concentration at the inlet of the cyclone separator, thereby reducing the unit consumption of the catalyst. At present, the rapid separation devices in the out...

AI Technical Summary

Problems solved by technology

However, the problem with this method is that the different types of hydrocarbons carried by the raw catalyst are not stripped separately, causing some easily stripped hydrocarbons to stay in the settler for too long, resulting in excessive cracking reactions and thermal cracking reactions

The reaction oil gas generated by this method contains a large amount of catalytic wax oil with a boiling point greater than 350°C, and even fractions with a boiling point greater than 500°C. Difficulty

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