RU2244012C1 - Method for manufacturing sugar - Google Patents

Abstract

FIELD: sugar industry.

SUBSTANCE: method involves purifying diffusion juice, clarifying crude sugar, evaporation of juice to obtain syrup and crystallization of syrup in vacuum-apparatus. Clarifying crude sugar is carried out by taking off part of purified juice feeding to evaporation and addition crude sugar to it up to the content of dry matters in clarification 55-65%, or by addition of crude sugar to syrup obtained after partial evaporation of purified juice up to attainment of indicated content of dry matters in clarification. Clarification obtained in the first case is mixed with syrup of the remainder amount of purified juice with the content of dry matters 55-65%. Before the boiling out process obtained clarifications are subjected for purification. Invention provides processing large amount of crude sugar with beet simultaneously, to enhance the yield of the ready product and to reduce specific energy consumptions in evaporation of sugar-containing solutions.

EFFECT: improved manufacturing method.

3 ex

Description

The invention relates to sugar production and can be used in the processing of sugar beets in conjunction with raw sugar.

A known method for the production of sugar from sugar beets (Sapronov A.R. Technology of sugar production, M., 1998), which provides for obtaining juice in diffusion apparatus from beet chips, defecosaturation (lime-carbon dioxide), purification of diffusion juice, filtration, juice sulfation, its concentration in a multi-stage evaporator, boiling of syrups in vacuum apparatuses, separation of sugar crystals in utfel mixers and centrifuges, drying of sugar. The disadvantage of this method of sugar production is the high energy consumption due to the need to evaporate more than 100% water to the weight of beets.

The closest analogue of the proposed method is a method for the production of sugar from sugar beets, which involves cloning raw sugar with filtered juice of I saturation, mixing juice of I saturation with the obtained tart, defecating the mixture, saturating it, filtering, sulfitating, evaporating the juice to syrup, boiling and crystallizing the syrup into vacuum apparatuses, centrifugation and drying of sugar (Processing of raw cane sugar together with beets, Bugaenko IF, Desheva I.Yu., Sugar No. 3, 2001, p.21).

The disadvantage of this method is the limitation of the amount of raw sugar used for peeling until the dry matter content (CB) is increased to 15-16% after mixing with purified juice before the evaporator and, accordingly, insufficient reduction of specific energy consumption for sugar production.

The technical result of the invention is to increase the amount of raw sugar processed simultaneously, together with beets, thus increasing the yield of the finished product and reducing the specific energy consumption for the evaporation of sugar-containing solutions.

This technical result is achieved by the fact that in the proposed method for the production of sugar, which involves the purification of diffusion juice, the clarification of raw sugar, evaporation of the juice to syrup, boiling and crystallization of the syrup in a vacuum apparatus, the raw sugar is glued by selecting a portion of the purified juice directed to evaporation and the introduction of raw sugar into it to a dry solids content of 55–65% in clearing, or by introducing raw sugar into the syrup obtained after partial evaporation of purified juice until the indicated content of su chemical substances in klerovka, while klerovka obtained in the first case is mixed with the syrup of the remaining amount of purified juice having a solids content of 55-65%, and the obtained klerovka is cleaned before boiling.

A method of producing sugar is as follows. Diffusion juice is subjected to defecaturation purification. Then it is filtered, sulfonated and directed to evaporation. Raw sugar clovering is carried out as follows. A part of the juice is taken before the evaporation unit and raw sugar is introduced into it until the solids content in the clearing is 55-65%. This klerovka is cleaned and mixed with syrup after evaporation of the rest of the juice, boiled in a vacuum apparatus, sugar crystals are separated in masher and centrifuges, sugar is dried.

Or clearing is carried out by introducing raw sugar into the syrup obtained after partial evaporation of the purified juice until the indicated dry solids content in the clearing is achieved. The clover is cleaned, boiled in a vacuum apparatus, sugar crystals are separated in masher mixers and centrifuges, and sugar is dried.

The choice of raw sugar clearing option depends on the amount of beet and raw sugar in the plant.

Raw sugar clearing during the processing of beet juice reduces the proportion of water to be removed by evaporation, which reduces the specific energy consumption and allows efficient processing of beets and raw sugar simultaneously.

Example 1. According to a known method for the production of sugar at a beet sugar factory, 3000 tons / day of beets are processed into chips. Get diffusion juice with a CB of 13%, which is subjected to defecosaturation purification. Sugar of raw sugar is carried out in the selected part of the juice I saturation in the amount of 60 tons / day. CLEARING is mixed with the rest of the juice, increasing CB to 15%. This mixture is concentrated on a 5-stage evaporator, the resulting syrup is boiled in a vacuum apparatus, crystallized and dried sugar. The yield of food sugar is 460 tons / day.

Example 2. According to the proposed method for the production of sugar, 3000 tons per day of beets are processed per chip. Received by diffusion juice with CB 13%, which is subjected to defecosaturation purification. Selected 16% of beetroot diffusion juice and glued 303 tons / day of raw sugar to a content of 65%. The clover is cleaned and mixed with the rest of the syrup after evaporation, the resulting syrup is boiled in a vacuum apparatus, sugar crystals are separated in the mixers and centrifuges, and the sugar is dried. In relation to the known method in example 1, the yield of food sugar increases by 1.52 times to 700 tons / day, and energy consumption and the amount of evaporated water is reduced by 7%.

Example 3. The method is carried out analogously to example 2. The purified juice is evaporated at 4 stages of the evaporation plant to a CB of 50%, then 303 t / d of raw sugar is glued to it to a CB of 63.8%. The clover is cleaned, boiled in a vacuum apparatus, sugar crystals are separated in masher mixers and centrifuges, and sugar is dried. The yield of food sugar is 700 tons / day.

As can be seen from examples 2 and 3, the proposed method for the production of sugar, which involves increasing sugar-containing solids by grading raw sugar at the stage of concentration of beet juice, increases production efficiency, increases the production of food sugar by the plant while reducing specific energy consumption for evaporation of sugar-containing solutions, stabilizes the production power while reducing beet stocks.

Claims (1)

A method of producing sugar, comprising purifying diffusion juice, clairing raw sugar, evaporating the juice to syrup, boiling and crystallizing the syrup in a vacuum apparatus, characterized in that the raw sugar is glued by selecting a portion of the purified juice to be evaporated and introducing into it raw sugar until the dry solids content in the curing is 55 ÷ 65% or by introducing the raw sugar into the syrup obtained after partial evaporation of the purified juice until the specified dry matter content in the curing is achieved, while curing, Acquiring the first case, the syrup is mixed with the remaining amount of purified juice having a solids content of 55 ÷ 65%, the obtained klerovki purified before boiling.