A method for adjusting the catalytic cracking main fractionation tower to increase the production of aviation kerosene fraction

Abstract

The invention relates to a method for increasing the production of aviation kerosene fractions by transforming a catalytic cracking main fractionation tower. It includes the following steps: S1. Dismantle several trays from above the light diesel oil extraction hopper to the top and below the extraction hopper, and install packing A and oil collection tank A from top to bottom; where the oil collection tank A can extract jet fuel fraction and send it to jet fuel refining Device; S2, several trays below the rich absorption oil inlet are removed, and liquid distributor B, packing B and oil collection tank B are installed from top to bottom; where oil collection tank B can extract light diesel fraction; S3, aviation fuel The distillate stripper uses the original heavy diesel oil stripper. The jet fuel fraction enters the jet fuel fraction stripper for stripping. The jet fuel fraction is cooled and sent to the jet fuel refining unit, and the jet fuel fraction is extracted to control its 95% boiling point. The present invention increases the jet fuel extraction line of qualified jet fuel distillation range in the fractionation system of the catalytic cracking unit by transforming some trays of the fractionation tower of the catalytic cracking unit, fully utilizes the existing conditions of the old original unit, reduces the amount of modification work, saves investment, and is beneficial to the refining process. It has important guiding significance for chemical enterprises to increase production of jet fuel.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a method for adjusting a catalytic cracking main fractionation tower to increase production of aviation kerosene fractions. Background technique [0002] The demand for aviation kerosene (abbreviation: aviation kerosene, the same below) in my country's civil aviation industry is growing rigidly, and increasing the production of aviation kerosene is the transformation and upgrading direction of fuel-based oil refining enterprises. Transferring part of the catalytic diesel oil that meets the distillation range of aviation kerosene into the jet kerosene hydrotreating unit to process into qualified aviation kerosene has good feasibility and considerable investment returns, and has gradually been valued by petrochemical enterprises. The distillation range of jet fuel generally requires that the 95% boiling point temperature be ≤260°C, while the 95% boiling point tempera...

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 of each extraction line is determined by its distillation range), and there is no report on the extraction of fractions by modifying the tower internals. Reports on Jet Fuel Distillations Compatible with Jet Fuel Distillation Range

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