SU1261945A1 - Method of producing reftified alcohol - Google Patents

Abstract

A METHOD of MANUFACTURE of a RECTIFIED ALCOHOL, including the evaporation of alcohol and impurities from the mash in a brewing column, the separation of a stream of water-alcohol vapors leaving the brewing column, followed by purification of impurities, an epurentation in an epurene column, concentrating the impurities in the column, and the concentric column. characterized in that. In order to reduce heat and energy consumption and to obtain a reduced alcohol concentration, corresponding in quality to alcohol Extra, the concentration of impurities is carried out simultaneously with the purification of alcohol directly after boiling it from the mash, sent one part of the water-alcohol vapor from the supply column and heated the impurity concentration column and another as a heat carrier to the epuration column with its condensation and recirculation of the condensate to concentration and returning reflux from the bottom Part of this column (L at the stage of evaporation of alcohol and impurities from the mash, while the extraction is carried out directly after concentration, sent to the suction column purified from impurities concentrated alcoholic distillate with water supply for regrowth in the zone located below the inlet support and output methanol from its upper zone. E5; about 4; U1

Description

one

The invention relates to alcohol grade, and in particular to methods for producing rectified alcohol.

The aim of the invention is to reduce the heat and energy consumption, to obtain a reduced alcohol concentration, which is qualitatively equivalent to Extra alcohol.

The drawing shows the technological scheme of the proposed method.

The mash is preheated in reflux condensers 1 and 2 with warm water-alcohol vapor from the epure column 3 and column 4 concentrating the impurities to a temperature of 70-75 ° C, is fed to the feed column of the brew column 5. The broth column 5 is heated with live steam through a bubbler. A bard is output from the bottom of column 5, which is sent to a collection of bards (not shown in the diagram). The hydroalcoholic vapors from the upper part of the beer column 5 are divided into two streams in a 2: 1 ratio. Two parts of the water-alcohol vapor enter the bottom of the impurity concentration column 4 for heating and feeding it with alcohol, the remaining water-alcohol vapors enter the intertubular space of the boiler 6, where they give their heat to the epuret, which evaporates, heats the epuration column 3.

The condensate of water-alcohol vapor in the form of a distillate distillate from the boiler 6 is fed to one of the lower plates of column 4. From the bottom of the column 4, a water-alcoholic liquid in the form of reflux pump 7 delivers to the upper plate of the keep column 5. Column of impurities 4 has a battery dargus 8 reflux condenser 2 and a condenser 9. Column 4. is intended to provide most of the impurities accompanying ethanol: head (esters, aldehydes and intermediate (isoamyl, butyl, propyl and other alcohols. Column 4 melts using hydroselection. I, 0-, 5% of ethanol in the amount of ethanol is withdrawn from the condensers 9. Due to the supply of Luther water by pump 10 from distillation column II to the battery train 8, an alcohol zone is formed in column 4

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low concentration of 15-18% by volume. As a result, tail impurities acquire a headline character. These impurities are concentrated in battery pack -8, where the output is.

The aqueous-alcoholic liquid from column 4 is sent to the epuration column 3. Column 3 also works using hydro-selection, has

 reflux condenser 1 and condenser 12. In column 3, the alcohol is completely purified from impurities. From the condenser 12, the remaining head impurities and methanol are removed. The column from column 3 is sent to distillation column 11. Column 11 is equipped with a reflux condenser 13 and a condenser 14. Column 1I is intended to strengthen the alcohol to the desired concentration

° (90-93 vol.%). Column II is heated by live steam through a bubbler.

Technological parameters of the installation for the implementation of the proposed method are given in table. one.

Example. The implementation of the proposed method is carried out on a treatment plant with a capacity of 3000 dal / day.

 The installation contains four columns: brewery with a diameter of 1600 mm with 22 double-sided plates; the column is concentrated and impurities with a diameter of 900 mm with the 57th multi-plate dishes and an accumulator core (reflux condenser F 80 m, condenser F 10 m); 1200 mm diameter epuration with 39 multicolor plates (dephlegmator F

40 40 m. 5m capacitor); rectification with a diameter of 1600 mm with 74-mnogokolpachkovymi plates (reflux condenser F 100m, kong-2.

sator g 10 m;. In addition, the installation 45 contains pumps for the supply of mash, lute water, boil distillate, as well as a boiler F 40 m

Preheated to 50–75 ° C, the mash is fed to the reflux condensers of the epuration column and the impurity concentration column on the feed column of the brew column. Water-alcohol vapors with impurities from the upper 55 part of the mash column are divided into two streams in a 2: 1 ratio and sent — one for heating and feeding the impurity concentration column, the other - into the boiler, where heat is transferred to the epyurata, which Subscribe, heats epuration column. From the bottom part of the impurity concentration column, the water-spray liquid in the form of reflux is pumped to the feed column of the beer column. The hawser column is operated under a pressure of 125 kPa, and the steam consumption is 22 kg / dal. This heat is used to heat the impurity concentration column and epure column. In the impurity concentration column, the fusel oil is concentrated in the battery compartment, head impurities (esters, aldehydes) in a condenser by means of the gccselection. From these zones, impurities are derived in an amount of 1.5%. The water-alcohol liquid nap454 freed from the indicated impurities is equalized to the feeding plate of the epuration column. In the epuration column, the alcohol is completely purified from impurities. The column also works with hydraulic selection: the remaining impurities are removed from the condenser in the form of an ether-aldehyde-methanol fraction in an amount of 1.0%. The sample from the epuration column enters the distillation column, where alcohol is strengthened to the required concentration (92% by volume). Obtaining alcohol of low concentration allows to reduce the reflux ratio by 2 times (from 4.5 to 2.5) and, as a result, reduce the consumption of naira per distillation column from 25 to 14 kg / dal. Technical and economic advantages of the proposed method compared to the known are presented in table. 2. T a b i c a 1

Pressure, kPa

in a boiling chamber

over the top plate

Temperature, ° С

on a nutritional plate

in a boiling chamber

over the top plate 95-97

which

108-110

115-117 101-10Z 101-102

79-80

88-90 88-90 103-104

78-79

78-79

12619456

1bl2

Claims (1)

METHOD FOR PRODUCING RECTIFIED ALCOHOL, including the distillation of alcohol and impurities from the mash in the mash column, the separation of the stream of water-alcohol vapors leaving the mash column into two parts, followed by purification of impurities, epuration in the emulsion column, concentration of impurities in the concentration column and concentration column characterized in that, in order to reduce heat and energy consumption and to obtain alcohol of low concentration, corresponding to the quality indicators of Extra alcohol, the concentration of impurities is carried out by at the same time with alcohol purification immediately after · boiling it out of the mash, directing one part of the water-alcohol vapors from the mash column to food and heat the impurity concentration column, and the other as a heat transfer medium to the emulsion column with its condensation and condensate recirculation to concentration and with reflux return from the bottom of this column to the stage of boiling off alcohol and impurities from the mash, while the epuration is carried out immediately after concentration, directing the impurity purified to the epilation column nd concentrated alcohol overhead with the water supply to gidroselektsiyu a zone located below the overhead strong input and output of methanol from its upper eons. I 261 945