SU1437383A1 - Method of processing oil - Google Patents

Abstract

This invention relates to chemical chemistry, in particular to the processing of petroleum. The goal is to increase the yield of diesel fuel and the vacuum distillate fraction, as well as to improve the quality of distillate fractions. Oil refining is carried out by distillation in an atmospheric column using chilled circulating reflux to obtain the desired fractions and the residual fraction. The latter is subjected to distillation in a vacuum column with a stripping section to obtain target fractions using circulating irrigation to drain hydrocarbon vapors and decomposition gases from the top of the vacuum column. The latter are subjected to condensation and absorption in a low-pressure absorber cooled circulating irrigation atmospheric columns with lodgchi obtained product in the bottom of the atmospheric column. From the zone of the atmospheric column located above the feedstock input, the vapor phase is diverted by directing it to the stripping section of the column. The process is carried out with the low pressure absorber being fed to the top of the cooled residual fraction of the atmospheric column and the circulating irrigation of the vacuum column. Diesel fuel extraction increases by 1.1 wt.%, Vacuum distillate fraction — by 8.7 May.-I. 3 tab., 1 Il

Description

Invention relate ;; to promosnZ. refining of oil and oil; used in the oil industry,

The purpose of the invention is to use the output and quality of diesel;) or; WE and a vacuum distillery dress;

In the drawing there is a representation of 1; - pial scheme is carried out1; Cn:% -,

The original SFU is heated; aut and not ----, and is introduced into the first rectification} G7th (atmospheric) column 2 of the line-; ,, From the intermediate section) :: column 2 along the line 4, the output of the cyrk; / lltsi; window:.: E irrigation, cooled to a temperature range;: n1; ke 5 and along the line 6 rec1: they see li KCIlonnu, the rest of the column. heating in the furnace 7 and on line 8 are introduced into: h :: o (vacuum) column 9. with; and:,; and which along line 10 leads to the residue, C of the intermediate section with band i 9: o: 1 1 conclusion t is circulating ;;: dionic irrigation, cooled in teptygkubenni - ,,; 12 and along the line 13 pe 11 1krruzhruzht in ks; .. 1on well. Pairs from the top of the columns:, 9 io; it;: -: t-; H 14 are injected into the bottom of the absorber of a pressure of 15, in which;: / :: ta.-1 along the n-; contact devices l.i. The remainder of the column .2 and oxjj; br, D; ei-: irrigation in the refrigerator of 19 cubic meters of the column 9, irrigation of the column 9, which h is set; h ;: aSorption, vapors are removed from abss-Hcr through line 20 and after heating ;; the exchanger 18 and the heater 2i:; about line 22 returns to -r-is colonies / From the top of column 2, from the ave:; intermediate; About the cross section of the column 2nd count:; kn 9 io lines 23-27 and 28 receive distnl. Nye frakids and. Intermediate distilled fractions of column 2 are fed to the stripping sections 29, 30 and 31, in nmu (bulk for pulverizing the lungs, respectively, on lines 32. JJ 3; i: O- give heated streams. LL ; ip from column 2 are condensed: ks; e -: a, and 35 are fed to the tank — Zo, Ji, k; ;;; -; from tank 36, I feed water through line 37. and column 2 reflux. ., output along lines 38, 39 and 40 from the zone above; the feedstock to column 2, is fed along the line as an evaporating aremvi and from the discharge section of column 9.

The invention is illustrated by the following examples.

 ol ;; /;:; ;: T);,. ;; С r: ;; i; i г, -Ь ;; .-: с. ) S with a couple known to i: pe; .i, j ;;;. R; ieMOKy sp i t ia iri: - |; ressl zovashch s ::; ozh-a gmisfsrnon 1- ri iKyyi-iNOM -: OJ; C; K XTnHofiKH r; a; ji sn i-eibTV j-jil.

Calculation; ,,. ,, - loHif prove, i;:. nc -p.-orthi-E C HIM 1 a1; Cp:; a, C vertex a; ; C Cфт: p oh cology sex. g .; ;: t; dl tE U about:; rlqtsi; o - tle.psh, oizchn, C :: goy rapajiKK (;.; th: s xlimna) -: grsz

  Section Vb; SODIAT KSROein. with spd; -; :) th plates KOJicrnuj pyzoLi: ec-; y: c cymbals ;;. y .-. ppm. ;;; i; igaLL; a - that are. of Kolo; n; Xipc; -kjnyum from- L: cUi4yio ceKUMij ;;;, at the top-. . , ь:. ;; pi yj; -u -; ::: n: e irrigation

l.1uk r with 1zherkh, j (; px; -r: H and n} k: e; 1 otaar; x section g. :: 11; length of line (even 1;,: r yu

n forest tl). xglom; -:.; (k:; - ;;; 1. yciHKo, B in v ..- ip ;; bix; ivr: s :: ns; section of atmospheres; oh ie jJOHUb; grids of about th; ve - eoretical- ;; rape.njcii,.) C P E1; ayut twenty iJepByic Taj :. ,

Fuel oil at atmospheric columns are heated in the furnace; -; n pooazhg; ninth theoretician: ko; OPH. So:) share plates (score e top of the column) .n: lvod t yellowy) fraction

dyslngoggawa, c / flattering plate - naku ::; chn: lo gill; y; c fraction. From the bottom of the COLON):;:., Displays, F o. s; ski, | -sh akoum 1oL olo; -n s 1 adopt theoretical -1 are.

Upper Niner and, lt; young orc or higher; corresponds to: Bt: n: o from the second and 4eT.:iep:;) H plates, g.-1 with g.: mg eratu:) with: th o (J (J s: O (, eo. response CTBeH ;;. j Uti and live

. gfelik colon ..- 1b: iar; e Bcpxii vacuum rod. eei ;: eav. in the absorber nlkkage D1 ;;. s; 1e1 I, in which it is set; and-1 svelei5 com t; s.ktv1,: g y: Y} o -icei Ba. equivalent e. Theory: ь eekmm plates. The pressure of the top of the vacuum column is 0.0065 Xila 5 absorber n -1zko: o pressure 0, Mlia,) epal,; avleki lchl theoretical gg plate on the atmssfer-1 column, take pPBHbiM 0.001 MLa and vacuum holo.on OjJO) 7 i- Jla.

II p and measure j (izves: method), p bottom of the atmospheric column: i t / h of the water of the foot tree, and the bottom of the column COLUMN ianaruyuschay1gate i; e;

3i

give. Last works without spud: - Noah section. Pairs from the top of the vacuum) G; 1 t / h columns with a temperature of 136 C are directed to the bottom of the low pressure absorber, at the top of which in the amount of 50 t / h with a temperature of 40 C, the lower circulating column of the atmospheric column is fed, which, after absorption of vapor with temperature - round 45 C in a quantity of 51 t / h is returned to the line of introduction into the column of circulating irrigation. The pressure in the atmospheric column is assumed to be equal to 0.19 MPa.

The main showings. 1and atmospheres} 10 1 and vacuum columns for oil rectification are given in Table. 1, fraction; -: - the composition of raw materials and products section: 1e nor - in table. 2

Example 2 (the proposed method). The difference from example 1 is that in the bottom of the vacuum column in the amount of 4 tons / h with a temperature of 110 ° C, the vapor phase from the atmospheric irrigation tank and in the amount of 6 tons / h the vapor phase from the tenth plate (count from the top) of the atmospheric column is fed. , and at the top of the low pressure absorber simultaneously; but 60 t / h of the second column cooled cooling to 40 ° C and 8 t / h of the atmospheric column cooled to 40 ° C, which are 155 t / h after vapor absorption and heat generation, due to heat exchange with the residue, directed to the absorption and additional heating to a temperature of 300 ° C, is introduced to the bottom of the atmospheric column (the fraction of distillation at the entrance to the column is 0.15). Water vapor is not supplied to the bottom of the atmospheric column. By supplying vapor from the reflux tank of the atmospheric column to the bottom of the vacuum, the pressure of the top of the atmospheric column decreases. It is taken equal to 0.11 MPi instead of 0.19 for example 1. The main operational parameters of the columns of Example 2 are given in Table. 1. Fractional composition of separation products - in table. 3

Of the representations; It follows that the proposed method allows

1o; 1-: beat: v: -; j; i and,:. : -: - tsyh fragiii- p. : ь; | .rch r, i: iMna v cym: api; m,. .3; iacT; Kg from 9 (5.8 / k - 91.8 t, h, then H: 1– on, i May ./J, I poured me a sheet of fraction from 15 (; about 163 t / h, i.e., at 8, 7 beats, 7. In addition to Toi i, iip-j: i-lgasmts way Gyusr. Molya Street; :: 1 tV;. G; -: ec Tiio dtsnlllnye fractioniG. , ro up: -j4a} iHe in keros1; but fr, 23H S. - kk C; izhatsya from 10.4 d; -., 8, lg doubles duto :::; willow fr,,}) . to. - 2-V. (, - from 8.9 to 7, 1,; Baku t-: no.:. ittoy. and. k. - 3b to 3.8 to 3.1-: ± p. 50 f С - к, к. - с 8,2 :: о 7 ,.

(L1OS ..- From the refining of oil of the industrial production plant. Jii) aTMoc :. the column using the Pom ohx :: ajen1-; th circus l pony on opou eioiH with: otoch1; iioKoii- Densirir smoy napoBOii faz; jiep: a,;, 1, x; x: and the residual coat:; ai, yusledu; s; ie 1 its rectification h; in ipkumiyoy kolo; ; e, lined with a 015th section og, with a half-1 psg-: islor1.1: fra - :: 1Iy with the use of the C1 1tkul: ionic orok: Yeni and a withdrawal from the pile of the vacuum-KOLONI hydrocarbon: -: vapors and gases decomposition of J KO ;; iecation and losorb:; and they in aor; i ;; 3Koro da) - laziness cooling 1entm; circul cisn; 1; irrigation of the atmosphere {oh kslo; P1y with :: allch1 gyu. guchenny:; godu and in aThioCipepno pillars, about t: and this is the case with that, with a pitch: 11..u pon :: 1c; and the output of the diesel: Ton / iiisa and vacuum; of the bottom fraction, as well as the increase in the quality of distilled distillates, from the atmospheric co. -: - Noah B1) Line of input of raw materials, the ferry phase is diverted, mixed with the vapor phase sepxa ko: 1nons with its direction to the distillate} guk) section of the column and the process is carried out with feed to the top of the absorber the low pressure of the cooled residual fraction of atmospheric coloin: and the circulating reflux of the vacuum column.

Table 1

From the intermediate section of the reinforcing section

Low vapor vapor absorber

Upper Circulation Irrigation of Vacuum Column

Lower circulating irrigation

Water vapor to the bottom of the atmospheric column

248 90

one

Temperature, From the top of the atmospheric column

Input of raw materials

Bottom of the atmospheric column Top of the vacuum column Input of raw materials

The bottom of the vacuum column Absorbent on top of the absorber Product from the bottom of the absorber

Vapor phase in a vacuum column from the reflux tank of the atmospheric column

from intermediate section

Heat load, GJ / h. Furnaces for heating of stripped oil. Furnaces for heating fuel oil.

Atmospheric column condenser cooler

Heat exchangers upper circulation irrigation

Heat exchangers of lower circulating irrigation

Heat exchangers of the upper circulation irrigation of the vacuum column

Heat exchangers of lower circulating irrigation

Heat exchangers for heating and cooling the absorbent

Absorbent Refrigerators

U37383

8 Continued table. one

6.2

The content of the fraction, may.% 160 ° C - CoC. in gasoline, -} bO ° С in kerosene 230 ° С - к, к. to kerosene ik - 230 ° C in light diesel fuel ZbO with - k.k. in light diesel fuel, etc. - in heavy diesel 360 ° С - к.к. in heavy fuel oil, ik, and total fuel oil

З60 с - к, к. in total diesel fuel n. - 360 ° with fuel oil

Q

NK - 360 С in vacuum distillate

500 С к.к „in a vacuum distillate n.k. - 160 ° C in tar n. - 360 ° C in tar

He to. - 500 ° C in tar

Continued tabl, 1

9.0

12.3

7,8

7.9

4.8

2.5

20.8

7.1

7 j

19.3

3.1

7.9

0.01

0.16

5.6

 Sabltsy 2

Continuation of table 2

Claims (1)

Method for oil refining by distillation in an atmospheric column using cooled circulating irrigation to obtain a condensed vapor phase of the top of the column, target fractions and residual fraction, its subsequent rectification in a vacuum chamber equipped with a fire section, to obtain target fractions using circulating irrigation and barrel from the top of the vacuum column of hydrocarbon vapors and gases of decomposition, condensation and absorption in a low-pressure absorber with cooled circulation irrigation a Mosospheric column with feeding the obtained product to the bottom of the atmospheric column, because the purpose of catching the output of diesel fuel and the vacuum distillate fraction, as well as to improve the quality of the distillate fractions from the fault of the atmospheric column located near the input of raw materials, the vapor phase is removed and mixed with the non-condensable vapor phase of the top of the column with its direction to the distillation section of the vacuum column and the process is carried out with a cooled atmospheric fraction being fed to the top of the low-pressure absorber bosoms and circulating irrigation of the vacuum column.