RU2340679C1 - Method of brown sugar affination - Google Patents

Abstract

FIELD: food products, chemistry.

SUBSTANCE: method implies mixing final-product brown sugar with high green diluted up to 74-76% of solids content. The obtained affination massecuite is centrifuged. Prior to affination high green is treated by ozone-air mixture with the ozone concentration in the mixture equal to 5-15 g/m³ and with the amount of ozone-air mixture equal to 2-4 nm³/m³ of the runoff.

EFFECT: proposed method allows increasing affinated sugar purity on 0,4%, decreasing its colour degree on 15,8% and reducing processing time in 1,6 times as compared to the known process.

2 ex

Description

The invention relates to the sugar industry and can be used for the purification of yellow sugars in sugar production.

A known method of refining yellow sugar of the last crystallization, comprising mixing the sugar of the last crystallization with the first swelling of the massecuite of the first crystallization diluted to 74-76% SV. In the process of mixing the massecuite for 20 minutes in the refiner, part of the non-sugars from the film on sugar crystals passes into a cleaner intercrystal solution. The resulting refill massecuite is centrifuged (Sapronov A.R. Technology of sugar production. - 2nd ed., Corrected and add. - M .: Kolos, 1999. - S.338-340).

The known method does not provide a sufficiently high effect of purification of yellow sugar from non-sugars due to the high viscosity of the first outflow of massecuite I crystallization used.

The technical result of the invention is to increase the cleaning effect of yellow sugar in the process of affinity.

The technical result of the invention is achieved by the fact that in the method of refining yellow sugar of the last crystallization, which involves mixing it with diluted to 74-76% solids first flow of the massecuite of the first crystallization and centrifugation of the obtained reflux massecuite, the first flow of the massecuite of first crystallization is treated with an ozone-air mixture with a concentration of ozone in the mixture of 5-15 g / m ³ , the amount of ozone-air mixture is 2-4 nm ³ / m ³ outflow.

The method is as follows.

Diluted to 74-75% solids, the first outflow of massecuite from the first crystallization is treated with an ozone-air mixture in an amount of 2-4 nm ³ / m ^{3 of a} solution with an ozone concentration of 5-15 g / m ^{3 in} order to reduce its viscosity and color, then the outflow heated to a temperature of 60-65 ° C and served in the refiner. Then, yellow sugar of the last crystallization with a temperature of 60-65 ° C is introduced into it and stirred for 10-12 minutes. Then the massecuite is centrifuged to separate the affinity outflow from refined sugar.

When processing the first outflow of massecuite from the first crystallization with ozone, the viscosity of the outflow and its color decrease, which reduces the duration of the refining process and increases the effect of removing sugarless sugar from the surface of sugar crystals, since a less viscous solution promotes an intensive transition of sugarless sugar from the crystal surface to the refining solution.

The combined effect of these factors on the refined product enhances the cleaning effect and reduces the color of yellow sugar.

The method is illustrated by the following examples.

Example 1. 2 kg diluted to 75% solids of the first outflow of massecuite of the first crystallization is treated with an ozone-air mixture in an amount of 3 nm ³ / m ^{3 of a} solution with an ozone concentration of 12 g / m ³ in the mixture, heated to a temperature of 60 ° C and introduced into affinator. 3 kg of yellow sugar of the last crystallization with a purity of 93.6% and a color of 51.4 conv. units with a temperature of 60 ° C and stirred for 12 minutes. Then centrifuged to separate the affinity outflow from refined sugar. The resulting refined sugar is analyzed. The purity of refined sugar 96.5%, color 19.1 srvc. units

Example 2. 2 kg diluted to 75% solids of the first outflow of massecuite of the first crystallization is heated to a temperature of 60 ° C and introduced into the affinity. 3 kg of yellow sugar of the last crystallization with a purity of 93.6% and a color of 51.4 conv. units with a temperature of 60 ° C and stirred for 20 minutes. Then centrifuged to separate the affinity outflow from refined sugar. The resulting refined sugar is analyzed. The purity of refined sugar 96.1%, color 22.7 srvc. units

As can be seen from the experimental data, the proposed method for the refining of yellow sugars can significantly increase the efficiency of refining.

The proposed method of refining yellow sugar allows you to increase the purity of refined sugar by 0.4%, reduce its color by 15.8% and reduce the duration of the process by 1.6 times compared with the known method

Claims (1)

The method of refining yellow sugar of the last crystallization, which involves mixing it with a first swelling of the massecuite of the first crystallization diluted to 74-76% solids and centrifuging the resulting reflux massecuite, characterized in that the first outflow of the massecuite of the first crystallization is treated with an ozone-air mixture with an ozone concentration of mixtures of 5-15 g / m ³ , while the amount of ozone-air mixture is 2-4 nm ³ / m ³ outflow.