Catalytic cracker of coarse cyclone external tubular settler

Abstract

The utility model relates to a quick separation device of oil gas and catalyst in a fluidized catalytic cracking process, which is mainly used to solve the problems of long residence time of oil gas and severe coking in the existing settler. It is characterized in that: the outlet end of the riser 10 is directly connected with the coarse spiral 8, and the coarse spiral 8 is located outside the tubular settler 5; the lower part of the tubular settler 5 is a stripper 3, and the lower end of the stripper 3 is connected to the Raw catalyst standpipe or standby inclined pipe 2 communicates with regenerator 1; top spin 6 is located outside tubular settler 5. The catalytic cracking device of the present invention can realize high-efficiency and fast separation of gas and solid, the gas-solid separation efficiency is as high as 99.99%, the average residence time of oil and gas is shortened to less than 2 to 3 seconds, the possibility of coking coke retention is reduced, and the structure is simple and compact , greatly saving equipment costs.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to an oil refining and chemical process and equipment thereof, in particular to a rapid separation process of oil gas and catalyst and a rapid extraction process of oil gas in the fluidized catalytic cracking process. Background technique [0002] The fluid catalytic cracking process is one of the important oil lightening processes in the oil refining industry. The catalytic cracking process mainly includes a reaction system, a regeneration system, a fractionation system, and an absorption stabilization system downstream of the fractionation system. The reaction system and regeneration system of the fluidized catalytic cracking unit are its core, and the main equipment includes riser reactor, settler, regenerator, etc. In the catalytic cracking process, the riser reactor is the main place for catalytic cracking of raw oil and gas, and the mixture of catalyst and raw oi...

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Problems solved by technology

Chinese patent CN 02159408.2 (2005) discloses a cyclone type quick separator with a splitter cylinder, but the separation efficiency of the swirl arm type quick separator is generally lower than that of the cyclone separator, and the structure is also more complicated than the cyclone separator

Serious coking problems have occurred in heavy oil catalytic cracking units in many refineries, resulting in unplanned shutdown of catalytic cracking units, which directly affects the long-term operation of catalytic cracking units

[0014] Therefore, the existence of a large space inside the settler makes it difficult to realize the rapid separation of oil and gas and catalyst and the rapid extraction of oil and gas, so it is very necessary to reduce the unnecessary space in the settler and the supporting rapid separation equipment for oil and gas and catalyst of

[0015] At present, the development of rapid separation technology for oil and gas and catalyst, and the development of rapid extraction technology for oil and gas are all carried out on the premise of retaining the traditional settler, that is, all the gas-solid rapid separation devices at the outlet of the riser, and the top rotation is set in the settler. In the accommodated space, the space of the settler is very large, the size of the settler is difficult to reduce, and there is a large space for oil and gas retention inside, so it is difficult to ensure the rapid extraction of oil and gas

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