SU1249062A1 - Method of processing residual oil fractions - Google Patents

Description

"

The invention relates to a method for treating residual petroleum by the liquid fraction by vacuum distillation and can be used in the refining and petrochemical industry. .

The aim of the invention is to increase the yield of the desired products by additional evaporation of the feedstock.

The drawing shows the installation diagram for the implementation of the proposed method.

The feedstock — a vapor-liquid stream — is directed to the evaporative space of the vacuum column 1 via line 2 through the nozzle 3, where it passes through guides ensuring the flow is twisted around the inner shell of the evaporative space, thus increasing the residence time of the gas-liquid flow in zone 4 of the evaporative space columns, during which additional evaporation and separation of the gas-liquid flow occurs.

The steam part of the raw material is sent to the reinforcing part 5 of the column, and the liquid is sent to a special pocket 6, where the gas-liquid ultrasonic nebulizer 7 is located, to which steam is supplied via line 8 Liquid, sprayed, using the nebulizer 7, turns into finely dispersed mist, while the surface of the liquid increases and additional evaporation takes place, which contributes to a more complete separation of the target fractions from the liquid that flows down to the bottom part 9 of the column. For the addition of liquid stripping, a portion of the column is supplied with water vapor through line 10 through fitting 1. The bottom product is withdrawn through fitting 12 through line 13,

Example. Vacuum distillation is subjected to a residual oil fraction having the following xapaJ termination: specific gravity 0.92 hydrocarbon gas content 0.3 weight,%; the content of products boiling up to 500 ° С is 50 wt.% residue above. 500 with 50 wt.%.

Water vapor is supplied to the bottom part in the evaporating space through an ultrasonic nebulizer, which captures the liquid and, with a vapor in the form of a mist, has chosen

2

in evaporacation spaces In the evaporative space there are 2 spacers,

The table shows the conditions for carrying out the proposed and known methods and the results obtained therewith.

five

0

five

five

Raw material temperature at the input, С

.The residue temperature, C

The temperature of the vapor phase, waste - from the top of the column, C

0 temperature of irrigation, С

Water vapor temperature, ° С

Pressure ra, MPA

pa0

Residual

pressure,

mm pT: Upper Evaporation space

Cuba

Steam supply: into the evaporative space, wt.%

in the cube of the column, May „%

390

334

390

334

160 80

400 1.0

52

99,129

160

80

400

1.0

52

99

129

50

50

100

2000

2000

992.58 912.96

Editor P.Kossey

Compiled by N. Korolyov Tehred V. Kadar.

Order 4202/27 Circulation 482Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Specifications

Way

Proposed

 Famous

Selection of the residue boiling above 480 ° С (thousand tons / year)

The yield of the target product, wt.% From the feedstock

974.42 1055.04

42

38

Proofreader M. Demchik

Claims (1)

METHOD FOR PROCESSING RESIDUAL OIL FRACTIONS by vacuum distillation with the supply of heated raw materials to the evaporation space of the distillation column with the formation of steam and liquid streams, the supply of water vapor to the bottom part of the column and removal of target products from the column, characterized in that, in order to increase yield of target products, the liquid flow of the evaporation space is subjected to additional spraying. water dad.