Expansion,Energy Conservation,Quality Improvement Revamping Of CNPC Jinxi Branch's No.2 Atmospheric And Vacuum Distillation Unit

Atmospheric and vacuum distillation unit is the first procedure of crude oil processing, and the largest device of the oil processing. The processing ability of the atmospheric and vacuum distillation unit is the symbol of a refinery's processing ability.CNPC Jinxi Branch's No.2 atmospheric and vacuum distillation unit was built up and put into operation in July of 1962. Its original designed ability is 0.5Mt/a, and it was expanded and reformed to processing Daqing crude oil, reaching a maximum ability to 2.0Mt/a in 1984. Being a fuel-lube-based unit, it mainly produced gasoline, aero-kerosene, diesel oil, urea material, lube oils and residue oil. From middle 1990s, the unit needs more and more foreign light oil for mixed processing, because of the device's insufficient crude oil processing ability, and the market changes -- Daqing crude oil's year-by-year reduction. All this made the existed problems of the unit more prominent: one problem is that the existing equipment cannot meet the ever-increasing need of crude oil processing volume; the second is that the quality of products gets obvious influence after the raising proportion of mixed foreign oil; the third problem is that the energy consumption of the unit is comparatively high. These problems not only seriously influenced normal operation of the device, but also restricted raising of comprehensive benefit of the whole enterprise.For this reason, in 2000, CNPC Jinxi Branch decided to reform No.2 atmospheric and vacuum distillation unit. Processing ability of the unit (designed according to the mixed ratio of Daqing crude oil to Minas as 3:1) has been raised from 2.0Mt/a to 2.5Mt/a, processing flexibility stability has been raised as well. The final heat exchange temperature raised from 275℃to 295℃; burner efficiency raised from 84% to 89.5%; unit electricity consumption lowered from 2.0KgEo/t to 1.46KgEo/t; unit vapor consumption lowered from 2.2KgEo/t to 0.35KgEo/t, basically realized self-sufficiency. Comprehensive energy consumption lowered from 17.25KgEo/t to...