Method for increasing yield of aviation kerosene fraction by adjusting catalytic cracking main fractionating tower

Abstract

The invention relates to a method for increasing the yield of aviation kerosene fraction by modifying a catalytic cracking main fractionating tower. The method comprises the following steps that: S1,a plurality of tower plates above a light diesel oil extraction hopper and below a top cycle extraction hopper are removed, and a filler A and an oil collecting tank A are arranged from top to bottom,wherein an aviation kerosene fraction can be extracted from the oil collecting tank A and sent to an aviation kerosene refining device; S2, a plurality of tower plates below a rich absorption oil inlet are removed, and a liquid distributor B, a filler B and an oil collecting tank B are arranged from top to bottom, wherein a light diesel fraction can be extracted from the oil collecting tank B; and S3, an aviation kerosene fraction stripping tower utilizes an original heavy diesel oil stripping tower, the aviation kerosene fraction enters the aviation kerosene fraction stripping tower to be stripped, the aviation kerosene fraction is cooled and sent to the aviation kerosene refining device, and the 95% distillation point of the aviation kerosene fraction is controlled according to the extraction amount of the aviation kerosene fraction. The aviation kerosene extraction line of the qualified aviation kerosene distillation range is added to the catalytic device fractionating system by modifying part of tower trays of the catalytic cracking device fractionating tower and other measures, existing conditions of an old original device are fully utilized, the modification work amount is reduced, investment is saved, and important guiding significance is achieved for aviation kerosene production increase of refinery enterprises.

Description

Technical field [0001] The present invention relates to the field of petrochemical technology, and more particularly to a method of adjusting the catalytic cracking main fraction column to increase the air kerosene fraction. Background technique [0002] my country's civil aviation industry has rigidity growth to air kernels (simply as: aerobics, the following) demand, and increased production and coal is the direction of transformation and upgrading of fuel refinery enterprises. The catalytic diesel that partially conforms to the aircraft fraction is transferred into the aerobic hydrothermal hydrothermal apparatus to qualified, with better implementable and considerable investment income, has gradually attached importance to petrochemical companies. The fraction of the aircraft generally requires 95% distillation point temperature ≤ 260 ° C, while the diesel of 95% distillation point temperature is ≤365 ° C, in view of the difference between the catalytic diesel and the zooming ...

AI Technical Summary

Problems solved by technology

For the internal transformation of the existing catalytic cracking main fractionation tower, there has not been any report on changing or increasing the extraction line fraction of the main fractionation tower (the composition...

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