SU1472485A1 - Method of distilling oil miscellas - Google Patents

Abstract

The invention relates to the oil and fat industry, in particular, to methods for distillation of miscella. The aim of the invention is to accelerate the process and improve the quality of the oil. This is ensured by the fact that the miscella is distilled under vacuum in three stages, while in the second stage the distillation is carried out by spraying the miscella in a stream of steam, which is used as juice pairs from the third stage, while in the third stage the temperature of the steam in stream 170 is maintained. 200 ° C, with a steam consumption of 0.15-0.18 kg / kg miscella. 1 tab.

Description

The invention relates to oil and fat, in particular to methods for distilling miscella.

The purpose of the invention is to accelerate the process and improve the quality of the oil.

The method is carried out as follows.

Filtered and preheated miscella with a temperature of 57-60 ° C and a concentration of 15-25% continuously enters the first stage distiller - at a pressure of 0, On, which is heated by gasoline and water vapor distilled from the second stage distiller at 75 -90 C. In the first stage distiller, the process proceeds during the descent of the miscella, for example, in a downward film. In the first stage, the miscella is evaporated to 50% to 65% drainage, the temperature of the miscella at the output of the first stage is 65-70 C. in the heat exchanger up to 70-75 C and under in the second stage distiller, where the pressure is maintained at 0.6 10 Pa and the miscella is sprayed in a stream of a mixture of juice vapors supplied from the third stage and fresh water vapor having a temperature of 170–200 ° C. 80-95 ° C are fed to a third stage distiller, in the volume of which at a pressure of (0.3-0.5) XX 10 Pa it is sprayed in a stream of superheated water vapor supplied at 180-200 ° C under a pressure of 3 - - 5 10 Pa. Consumption of fresh steam for the dispersion of miscella on the third mortar

N9 4 00

cl

Nor 150-180 kg per 1 ton of finished product Steam supplied for spraying, carries away the solvent from the third stage distiller. Juice pairs from the third stage are fed with a steam-fixer for raspishivanie miscella in the second stage distiller. The oil from the distiller, the third stage serves for cooling,

Example, Filtered mss cella with a concentration of 20% and temperature is fed to a first stage distiller under pressure O, 7 7 10 Pa, where the process is carried out in a downward film, and gasoline is evaporated from miscella under the influence of the heat of juice vapors, supplied from the second stage distiller at 80 ° C to a concentration of 60%,

From the distiller of the first stage, the mycelium is fed to the heat exchanger, where it is heated with superheated water vapor, which goes further to the second stage nozzles, up to 75 ° C, and then goes to the second stage to the steam ejector nozzle for spraying, to the steam nozzle of the nozzle the juice pairs from the third stage together with superheated water vapor from the heat exchanger at,

In the second stage distiller at a pressure of 0.6x10 Pa, miscella is evaporated in a dispersed jet to a concentration of 98%. Strong miscella to the final distiller, where it is sprayed in a stream of superheated water vapor with a temperature at a flow rate of 180 k 1 ton of finished oil, pressure in di dilator. 0.4 to 10 Pa. The oil is pumped out at 100 ° C. The oil distillation unit capacity is 0.327 kg / s,

The table shows the quality of the oil, t, e, residual solvent content (weight%), humidity (weight%) and acid number (mg Kon),

It follows from the table that when steam consumption is less than 0.15 kg / kg miscella, the residual content of gasoline is unacceptable, t, e, more than 0.1%; when steam consumption is higher than 0.18 kg / kg miscella, the moisture content of oil is more than 0.2% , t, e. we get a second-rate oil, at a vapor temperature of 165 ° C there is an increased content of gasoline and water; the steam temperature is 200 ° C - the maximum permissible according to the safety standards for oil extraction production.

Thus, the best are the modes of the process - when the steam temperature varies in the range of 170-200 s, and the steam consumption through. nozzles at the third stage - - 0.18 kg per 1 kg of the finished product. In oil extraction production, steam temperature above 200 ° C is unacceptable according to safety conditions.

However, in the wake flow of steam, there is a continuous supply. heat to the particles of miscella, and, accordingly, a more intensive (5 times higher than in the known method) process of evaporation (distillation) of the volatile component.

Claims (1)

Formula invented and A method for the distillation of oil miscella involving the distillation of miscella under vacuum in three stages; The third of which is carried out by spraying the miscella in a jet of superheated steam with the formation of sap vapors and oil, characterized in that, in order to speed up the process and improve the quality of the oil, in the second stage, distillation is carried out by smashing the miscella in a jet of steam as which is used by the juice pairs from the third stage, while at the third stage the temperature of the steam in the no-zoo C stream is maintained, at a steam consumption of 0.15 - 0.018 kg / kg miscella. - Ch 1L cho with -, - - cm "" "Mm oh oh oh c P IQ RF CL, C about f f - about about with about CD with with with sd g 1L g O-. m A "1 m" I m th fo th m CVJ go 1L CHO CS - -, (N with about with with with } 00 G 1L go - with with with: «« «H m h m with about with with with - C-J mid-d-hh "". "M" on the first cs: 1L OS 00 1O " " BUT " " С С С С С CN; Art. r to and. cm С С С С с с с с с - - see go m "m" m go on th cm with o-. with oo „„ see "" Ъ "( с с с с о о w oo 1l sh eaten - w o o с с о с о о Och o o - go t "" rc see f th go th  vO o th o „CN cm go h oh oh oh oh oo eat cm sh - go with cm - - oh oh oh oh from to 00 cm ,, : oh oh oh oh