SU1342908A1 - Method of producing oil fractions - Google Patents

Abstract

The invention relates to the production of petroleum fractions and can be used in refining. The goal is to increase the yield of oil fractions. The distillation of oil is carried out in an atmospheric column using a cooled upper circulating reflux to obtain the desired products and the residual fraction. The latter is rectified in a vacuum column with release of hydrocarbon vapors and decomposition gases from the top of the column, their condensation and absorption in a bar condensate (condensate production). The latter is fed with a cooled upper circulating irrigation of the atmospheric column, to which the condensate is returned. The method provides gasoline output up to 10, 15%, kerosene up to 15.15%, diesel fuel up to 21.2%, vacuum gas oil up to 25%, tar and gases up to 28.5%. 1 ill., 1 tab. i (L

Description

The invention relates to pr (5 life (1 dl of oil n1 1x fraction and can be used in oil refining).

The purpose of the invention is to increase the yield of distillate fractions by reducing their losses.

The drawing shows a schematic diagram of the proposed method.

A stream of preheated oil is fed via line 1 to the atmospheric column 2, which is divided into a gasoline fraction discharged through line 3, kerosene and diesel fractions withdrawn from the concentration portion through lines 4 and 5, and fuel oil discharged from the bottom of the column to as residue on line 6.

For stable control of the composition of the distillate fractions in column 2, circulating irrigation is used, which is fed through line 7.

The fuel oil from the bottom of the column 2, after being heated in the furnace 8, is directed to the separation into the vacuum column 3 into tar and oil or gas oil fractions, leading out along lines 10 and 11.

With fuel oil from column 2, due to insufficient clarity of separation, a portion of the hydrocarbon fractions that are components of the diesel distillate are captured. These fractions are evaporated in a vacuum column 9 and directed through the top of the column along the helmet line 12 to condensation into a barometric condenser 13. In addition, hydrocarbon vapors and gases, which are products of the partial decomposition of fuel oil in the furnace and tar, are added to these hydrocarbon vapors. the bottom of the column 9. As a reflux, the circulation oropenia of the column 2 cooled in a cold column 14 is fed to the barometric condenser. From the barometric condenser this liquid is combined with condensed hydrocarbon vapors and bsorbirovannymi achami T on line 15 returns you to column 2. Meabsorbirovan- gases are sucked in and through leaks in the air is directed into the vacuum column by the ejector pump 16.

Example. The conditions for carrying out the method on the AVT installation according to the proposed and known methods and the results of the process of the presentation in the table.

As follows from the table, carrying out the proposed method under conditions that are almost identical with the known method, the yield of the desired distillate fractions (gasoline, kerosene and diesel fuel) increases, and the vacuum gas oil decreases when the required boiling point temperature is reached.

F o rmu l invention

The method of obtaining oil fractions by distillation of oil in an atmospheric column using cooled circulation irrigation to obtain the desired products and residual Hot i fraction, followed by its rectification in a vacuum column with removal of hydrocarbon vapors and decomposition gases from the top, condensation and absorption into barometric condenser to produce condensate, characterized in that, in order to increase the output

The target fractions, for the absorption of hydrocarbon vapors and decomposition gases, are supplied with cooled circulation irrigation of the atmospheric column and the resulting condensate is returned to the atmospheric column.

top of the vacuum column

barometric condenser reflux

Ratio of irrigation and steam costs in a barometric condenser

Pressure, MPa, in atmospheric columns

vacuum

Yield of oil products, May.%

gasoline fr. up to 185 ° C

kerosene fr. 185-260 °

diesel fuel

fr 260-360 ° C

vacuum gas oil tar and gases

200-240 20-40

6: 1

0.14 5.32-10

Up to 10.15 To 15.15

To 21.2 To 25 To 28.5

"

ten

VN1-SPI

Order 4602/24

 nrazh 462 Subscription

Random polygons pr-tie, Uzhgorod, st. Project, 4

 nrazh 462 Subscription

rod, st. Project, 4

Claims (1)

Claim A method of producing oil fractions by distillation of oil in an atmospheric column using cooled circulating irrigation to obtain the desired products and residual fraction, its subsequent distillation in a vacuum column, with removal of hydrocarbon vapors and decomposition gases from the top of the column, condensation and absorption in a barometric condenser to obtain condensate , characterized in that, in order to increase the yield of target fractions, cooled circulating is fed to the absorption of hydrocarbon vapors and decomposition gases e irrigation of the atmospheric column and the resulting condensate are returned to the atmospheric column. Indicators Known method Proposed the way Temperature, ° С: oil heating 360-370 360-370 heating oil 400-420 400-420 vacuum top the columns 200-240 200-240 barometric condenser irrigation 20-40 20-40 The ratio of the costs of irrigation and steam in a barometric condenser 9: 1 6: 1 Pressure, MPa, in the column atmospheric 0 14 0.14 vacuum 5, 32 · 10 ' ³ 5.32-10 ' ³ Oil product yield May. / gasoline fr. up to 185 ° C Before 10 Up to 10.15 kerosene fr. 185-260 ° C Before fifteen Up to 15.15 diesel fuel fr. 260-360 ° C Before 20 Before 21,2 vacuum gas oil Before 26.5 Before 25 tar and gases Before 28.5 Before 28.5 VNIIIPI Order 4602/24 ________ Circulation 462 Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4