Highly-efficient energy-saving atmospheric and vacuum deep distillation process based on clear cut

Abstract

The invention provides a highly-efficient energy-saving atmospheric and vacuum deep distillation process based on clear cut. According to the invention, after first-section heat transfer of crude oil, the content of a fore-cut fraction with the temperature lower than the feeding temperature of primary distillation in primary distillation tower bottom oil is reduced to less than 1% to 3% through additional arrangement of a deep distillation stripper plate at the bottom of a primary distillation tower; after second-section heat transfer of the primary distillation tower bottom oil, the content of the fore-cut fraction with the temperature lower than the feeding temperature of primary distillation in the primary distillation tower bottom oil is reduced to less than 3% to 5% through additional arrangement of a flash tower at the front of an atmospheric furnace; flash oil enters an atmospheric tower for separation by pumping after being heated to 365 DEG C to 390 DEG C through the atmospheric furnace; through desuperheating rectification section and circulating reflux separation of partial hot heavy diesel, an initial boiling point of heavy diesel is controlled to be higher than 360 DEG C, and the gapping temperature of 5 DEG C or above is formed with 98% of second side stream of a diesel distillate, so the content of the fore-cut fraction with the temperature lower than 365 DEG C in atmospheric residual oil is reduced to less than 2% through additional arrangement of the deep distillation stripper plate at the bottom of the atmospheric tower; and by damp distillation of vacuum residual oil, the content of the fore-cut fraction with the temperature lower than a cut point in the vacuum residual oil is reduced to 5% or below through additional arrangement of the deep distillation stripper plate at the bottom of a vacuum tower.

Description

[0001] 1. Technical field [0002] The invention provides an atmospheric and vacuum high-efficiency energy-saving deep drawing process based on clear cutting, and relates to the field of petroleum refining. [0003] 2. Background technology [0004] Atmospheric and vacuum distillation units are the leading equipment in refineries and the basic equipment for deep processing, which directly affects the comprehensive benefits of the entire refinery. [0005] With the heavy and inferior quality of crude oil and the large-scale production of unconventional heavy and inferior oil such as shale oil, oil sand oil, heavy (thick) oil, super heavy oil, deep oil, asphalt, and coal tar in the future, it is difficult to directly As raw material for catalytic cracking of heavy oil. Improve the decompression extraction rate, strive to produce more catalytic cracking or hydrocracking raw materials, and reduce the yield of residual oil. It is the refining enterprise's overall plan to optimize t...

AI Technical Summary

Problems solved by technology

[0009] In addition, due to the unclear cutting of oil products at the bottom of the initial distillation tower, atmospheric tower and vacuum tower in domestic and foreign atmospheric and vacuum devices, although deep drawing has been achieved and the cutting point has been improved, high-quality diesel oil and wax oil still have a large increase , there is still potential to be tapped to reduce distillation energy consumption, and the economic benefits of atmospheric and vacuum devices and the entire refinery need to be improved urgently

Images