RU2197523C1 - Method of treating activated carbon loaded into activated carbon column during suspension period of water-alcohol mixture cleaning process - Google Patents

Abstract

FIELD: alcoholic beverage industry. SUBSTANCE: in vodka production, in order to suspense continuous or periodical water-alcohol mixture cleaning process performed with the aid of activated carbon loaded into activated carbon column, water-alcohol mixture- supply of the latter is suspended, the column remaining filled with water-alcohol mixture and activated carbon. The former is then drained and its residues are purged off with carbon dioxide fed into upper part of column. Free space thus appeared is filled with carbon dioxide and content of aldehydes contained in residual water-alcohol mixture saturating activated carbon is stabilized in carbon dioxide atmosphere during all the suspension period. Duration of this period depends on production necessity and carbon dioxide is supplied into column during all the period. Column is restarted after stopping of carbon dioxide access into column, release of the gas, and displacement of its residues by feeding water-alcohol mixture into the bottom part of column. EFFECT: accelerated treatment, reduced loss of produce, and prevented increased content of aldehydes during cleaning process suspension. 3 ex

Description

 The invention relates to the alcoholic beverage industry. A known method of treating a column with zeolite, comprising passing through it a stream of a gas inert with respect to zeolite and alcohol, not containing impurities, for example, compressed nitrogen, carbon dioxide, etc., alcohol with its fractional selection and zeolite regeneration (ed. St. USSR 357218, class C 12 H 1/048, 1973).

 The disadvantage of this method is the low quality of the finished product after the start of the cleaning process.

A known method of processing activated carbon loaded in a coal column, when stopping the cleaning process of the water-alcohol mixture, providing for its heating with air in two stages: first, up to 100-120 ^o C, and then up to 160-180 ^o C using a second stage of vacuum (ed. St. USSR. 461116, class C 12 H 1/04, 1975).

 The disadvantage of this method is the duration and complexity of the process, as well as the significant cost of heat and energy for heating the air.

 A known method of treating coal in water treatment, providing for its regeneration by exposure to it including a stream of carbon dioxide (A.D. Smirnov. Sorption water treatment, Leningrad, Chemistry, 1982, pp. 125-128).

 The method of wastewater treatment in microbiological production describes the method of desorption of organic substances by treating activated carbon with liquid subcritical carbon dioxide under pressure and removing it by lowering pressure until liquid carbon dioxide passes into gaseous, which eliminates the use of flammable and toxic substances for desorption and the need for coal regeneration ( RF patent 2079433, class C 02 F 1/28, 1997).

In the described sources, the process of stabilizing the composition of the treated water during the processing of coal is not provided. A known method of processing activated carbon loaded in a coal column, when stopping the process of cleaning the water-alcohol mixture, involving the extraction of the water-alcohol mixture by a stream of saturated water vapor with a temperature of 110-115 ^o C for 2-4 hours, cooling overhead, cooling coal by purging with compressed air to 20-30 ^o C, purging at this temperature with a gas mixture of air and ozone for 40-50 minutes, heating the coal with superheated steam for 40-50 minutes with a temperature of 350-400 ^o C and cooling with compressed by air (ed. St. USSR, 663719, CL C 12 H 1/04, 1979).

 The disadvantage of this method is the large heat consumption, the duration and complexity of the process.

 The closest method to the proposed one is a method for treating activated carbon loaded in a carbon column while stopping the process of cleaning the water-alcohol mixture, which involves draining the water-alcohol mixture from the carbon column, removing its residues by purging with saturated or superheated steam and exposing them to activated carbon with steaming (Production process regulations for the production of vodka and alcoholic beverages TR 10-475-96, 1996).

 The disadvantage of this method is the duration of the process of steaming and putting into operation a coal column, high heat consumption and loss of production.

 The technical result of the proposed method is to accelerate processing, reduce product losses and prevent an increase in aldehyde content when the cleaning process is stopped, improving the quality and quantity of high-quality water-alcohol mixture, reducing heat consumption.

 The technical result is ensured by the fact that in the method for treating activated carbon loaded in a coal column, while stopping the process of purifying the water-alcohol mixture, which involves draining the water-alcohol mixture from the carbon column, removing its residues by purging with the reagent and exposing them to activated carbon, Carbon dioxide is used as a reagent, they remove the remnants of the water-alcohol mixture, after which the resulting volumes are filled with carbon dioxide, and at the same time they are stabilized. the content of aldehydes in the water-alcohol mixture, which is saturated with activated carbon, by holding the latter in the atmosphere of carbon dioxide during the entire period of stopping the cleaning process.

 The proposed method is as follows.

 To stop a continuous or batch process of cleaning a water-alcohol mixture with activated carbon loaded in a coal column, the flow of the water-alcohol mixture is stopped in the last, while the column remains filled with it and activated carbon. The water-alcohol mixture is drained from the column and its residues are removed by purging with carbon dioxide supplied to the upper part of the coal column, and the water-alcohol mixture is removed from its lower part.

 The resulting volumes are filled with carbon dioxide and, simultaneously with exposure, the aldehyde content of the water-alcohol mixture saturated with activated carbon is stabilized by soaking the activated carbon in the atmosphere of carbon dioxide during the entire period of stopping the process of cleaning the water-alcohol mixture. This period depends on the production need, during which a continuous supply of carbon dioxide to the column is carried out.

 The inclusion of a coal column is carried out after the cessation of carbon dioxide intake, its release from the column and the displacement of gas residues by supplying a water-alcohol mixture to the lower part of the column. Exposure can be carried out under pressure of carbon dioxide up to 0.07 MPa.

 Example 1

After stopping the process of cleaning the water-alcohol mixture with activated carbon loaded in the coal column, by stopping the supply of it, the water-alcohol mixture with the aldehyde content of 5.8 mg / dm ^{3 is} drained from the bottom of the column and its residues are removed with carbon dioxide. For this, carbon dioxide is supplied from the cylinder through the gearbox to the top of the column. The resulting volumes are filled with the latter and, simultaneously with the exposure, the aldehyde content is stabilized in the water-alcohol mixture, which is saturated with activated carbon, by holding activated carbon in a carbon dioxide atmosphere for the entire period of stopping the process of cleaning the water-alcohol mixture, which is 48 hours, by continuous its filing in a coal column. The content of aldehydes in the water-alcohol mixture after 48 hours of shutdown is in the range of 5.3-5.8 mg / DM ³ .

 Example 2

The method is carried out analogously to example 1, only the process of stopping the cleaning is 96 hours, and the exposure in the atmosphere of carbon dioxide is carried out under an overpressure of 0.05 MPa. During this period, the content of aldehydes is 5.8 mg / DM ³ .

 Example 3

The method is carried out analogously to example 2, only the process of stopping the cleaning is 192 hours, and the overpressure is 0.06 MPa. During this period, the content of aldehydes is 5.6 mg / DM ³ .

 The deviation of the values of the aldehyde content is within the range of a possible error in the analysis.

 The proposed method allows to prevent an increase in the content of aldehydes, to stabilize the amount of their content at the time the process is stopped, to stop the operation of adsorption equipment for any period, and also to carry out cleaning in the same equipment both continuously and periodically, i.e. to regulate the volume of products depending on production needs while maintaining the classic method of purification of a water-alcohol mixture of vodka using granular activated carbon, which determines higher quality and organoleptic characteristics. In addition, the duration of coal preparation for the process is reduced, since the saturation of dry coal with a water-alcohol mixture is eliminated, it is brought to the required strength, provided after steaming, and the coal regeneration time is reduced from 48 to 1 h and the duration of coal preparation for equipment downtime, the process is accelerated putting the equipment into operation after forced stops from 4-6 hours to 1 hour, the volume of output is regulated without reducing its quality, due to a decrease in productivity at night I am from 40 to 5 dal / h, eliminating an unrecoverable product defect at 100-200 dal.

Claims (1)

 A method of treating activated carbon loaded in a carbon column while stopping the cleaning process of a water-alcohol mixture, comprising draining the water-alcohol mixture from a carbon column, removing its residues by purging with a reagent and exposing it to activated carbon, characterized in that the reagent is used carbon dioxide, they remove the remnants of the water-alcohol mixture, after which the resulting volumes are filled with carbon dioxide, and at the same time they stabilize the content of aldehydes in bottom-alcohol mixture which is saturated with activated carbon by soaking the latter in an atmosphere of carbon dioxide during the stop period of the cleaning process.