SU1381155A1 - Method of processing oil fractions - Google Patents

Abstract

The invention relates to petrochemistry, in particular to the processing of petroleum fractions. The goal is to enhance clarity of separation. Processing lead separation in a Stripping column, equipped with contact elements. The latter are made in the form of solid metal plates arranged horizontally and provided with openings for overflow pipes. The process is carried out with the use of water vapor by preliminary removal of the distillate vapor from the zones formed by contact elements, with the removal of the distillate vapor from the top of the steam column and from the bottom of the stripped residue. These vapors are heated and fed to the top of the stripping column above the first contact element when water vapor is supplied to each of the contact elements. The method allows for improved separation clarity and improved product quality. 1 il. with (L

Description

with

00

ate

SP

eleven

The invention relates to a method for processing petroleum fractions and can be used in the petroleum refining industry.

The aim of the invention is to increase the clarity of separation.

The drawing shows the scheme of the stripping column.

The invention is illustrated by the following examples.

Example 1. Kerosene fraction stripping is carried out in a stripping column, which is a vertical cylindrical case 1 with a diameter of 0.2 m and a height of 2.5 m, which has a nozzle 2 for introducing raw material 3 for withdrawing a mixture of distillate and water vapor nozzles, 5-7 for supplying water vapor through distribution blocks 8-10, made in the form of ordinary mother liquors with a diameter of 0.01 m. Steam is fed into the liquid layer to each of the contact elements 11 -13, spaced 0.5 m apart. Kontak These elements are placed horizontally solid metal plates with openings for overflow hollow tubes 14-16 with a diameter of 0.03 m and a height of 0.56 m each.

The preheated kerosene fraction is fed through the nozzle 2 to the contact element 11, where the most intense evaporation of its low-boiling components occurs, which is intensified by supplying water vapor through the distribution unit 8. The remaining part of the liquid through the flow pipe 4 is directed to the downstream contact element 12, on which the temperature is set is slightly lower than that on the contact element 11. Evaporation of the low boiling component is enhanced by the supply of water vapor into the liquid layer on ntaktny member 12 through the dispensing unit 9. Similarly, the process proceeds to the contact element 13. The outer pozerhnosti stripping, column manifold 17 is mounted in such a way that it interconnects the zones located between the contact elements (evaporatsionnye space). The collector is a hollow metal tube

with

YU

15 20 25 30

-js 40 j

0

55 2

meter 0.1 m long I, 75 m in the form of a comb.

The distillate vapors formed (low boiling point components) are directed to the heated collector 17 from the evaporating spaces between the contact elements due to less hydraulic resistance than in the flow pipes 14-16.

To prevent condensation of vapors of low-boiling components, the distillate vapors in the manifold are heated stepwise as they rise to a temperature above their condensation temperature,

The distillate vapors are condensed and separated from water.

Experimental conditions: the number of contact elements is three, the temperature on the contact elements, C: upper 11–220, average 12–212, lower 13–204, kerosene consumption 100 kg, water vapor consumption for each of the contact elements 0.25 kg. The result is 10.5 kg of distillate, 89.5 kg of kerosene with an initial boiling point of 133 C. In the known method, at the same temperature and at a flow rate of 100 kg of kerosene and water vapor of 0.75 kg, the number of stripped fractions is 7.8 kg, kerosene yield - 92.2 kg, the initial boiling point of the latter is 125 ° C. I

And p and m e p 2. Stripping diesel

the fractions are carried out according to example 1 under the following conditions: the number of contact elements is three, the temperature on the contact elements, ° C: the top is 11-270, the average is 262, the bottom is 254, the diesel fraction consumption is 100 kg, the consumption of water vapor for each from contact elegents of 0.5 kg .. B result is 12.3 kg of distillate, 87.7 kg of diesel fuel, with a flash point of 70 ° C and a temperature of 10% of distillate 230 C. By a known method at the same temperature mode and with a steam consumption rate of 1.5 kg, the amount of stripped fractions is 7.1 kg, the output of diesel fuel 92.9 kg willow with a temperature of 61 ° C and a temperature of 10% of the distillate 222 C.

Thus, the inventive method makes it possible to increase the clarity of separation and obtain higher quality products.

Claims (1)

The formula of the invented and A method for processing petroleum fractions by separating in a stripping column equipped with contact elements using water vapor by withdrawing from the top of the distillate vapor stripping column and from the bottom of the stripped residue, characterized in that, in order to increase the clarity of separation, contact elements made in the form of solid metal plates arranged horizontally and provided with openings for the overflow pipes, and the process is carried out by preliminarily discharging the distillate vapors from the zones formed by the contact elements, heating these vapors and feeding to the top of the stripping column above the first contact element when steam supply to each of the contact elements.