Two-step-method de-coloring technique for brown granulated sugar re-dissolved syrup

Abstract

The invention discloses a two-step-method de-coloring technique for brown granulated sugar re-dissolved syrup, which comprises the following steps: preheating the brown granulated sugar re-dissolved syrup to 80-83 DEG C; adding the syrup after being heated into a stirring box; adding phosphoric acid and saccharified calcium; fully mixing and then putting into a foaming box; introducing the syrup after foaming treatment into an upper floater from a juice draining pipe; adding de-coloring agent attapulgite, coagulant sodium polyacrylate and poly-diallyldimethylammonium chloride before introducing into the upper floater; performing upper floating separation on the syrup in the upper floater; putting syrup into a settler; adding chitosan and performing secondary de-coloring; stirring for 1min and reacting for 15-20min; settling and then filtering. The method of combining upper floating technique and settling technique is applied to the technique, so that the de-coloring and purifying effects are greatly optimized.

Description

technical field [0001] The invention relates to the field of sugar production, in particular to a two-step decolorization process of red granulated sugar back-dissolving syrup. Background technique [0002] At present, the sugarcane sugar production in China generally adopts a one-step method (that is, the cultivated white sugar is directly produced from sugarcane), and the red sugar is the final crystallization product, and the ratio of its natural yield to the first crystallization product white sugar is about 10% to 12%. The impurity content and color value of granulated sugar are high, and the price is low. In recent years, it has become unpopular. All sugar companies have re-dissolved and re-boiled or interplanted brown sugar to reduce or eliminate the production of brown granulated sugar; The high color value of brown sugar often affects the quality of finished sugar, so few enterprises currently use it; the non-sugar content and high color value of red sugar redissolv...

AI Technical Summary

Problems solved by technology

[0002] At present, the sugarcane sugar production in China generally adopts a one-step method (that is, the cultivated white sugar is directly produced from sugarcane), and the red sugar is the final crystallization product, and the ratio of its natural yield to the first crystallization product white sugar is about 10% to 12%. The impurity content and color value of granulated sugar are high, and the price is low. In recent years, it has become unpopular. All sugar companies have re-dissolved and re-boiled or interplanted brown sugar to reduce or eliminate the production of brown granulated sugar; The high color value of brown sugar often affects the quality of finished sugar, so few enterprises currently use it; the non-sugar content and high color value of red sugar redissolving syrup, if directly re-cooking white sugar, will reduce the quality of white sugar, especially the color The value is often on the high side or even exceeds the standard; at present, sugar companies generally dissolve the brown sugar and carry out sulfur bleaching before sending it to the sugar cooking section to cook the white sugar; The problem of high color value of boiled white sugar; foreign sugar factories use advanced methods such as membrane separation technology, ion exchange technology, and ultra-freezing crystallization technology to decolorize syrup, and the decolorization effect is remarkable. However, these methods require high technical requirements and The cost is very high, and it is still difficult to realize large-scale production in our country; the clarification and decolorization of brown sugar back-dissolving syrup has become a research difficulty in the current sugar industry