Method for producing refined sugar through ion-exchange fiber high efficiency decolorization one-step method

Abstract

The invention provides a method for preparing refined sugar through an ion-exchange fiber high efficiency decolorization one-step method. The method comprises the following steps: (1) conducting pre-treatment on sugar juice obtained through sugar preparation by a sulfurous acid method and a carbonic acid method; (2) conducting negative-positive-negative three-stage pillar exchange decolorization by adopting ion-exchange fiber until the sugar juice reaches the requirements of a refined sugar clear juice, and collecting into a clear juice box; (3) unloading sugar; (4) evaporating the refined sugar clear juice; (5) boiling sugar; (6) conducting help-crystallization and purging. According to the method provided by the invention, on the basis of the conventional sugar preparation process, the ionic fiber exchange process is added, the two-step method is replaced by the one-step method, and the refined sugar is prepared by directly using the sugar juice obtained through sugar preparation by the sulfurous acid method and the carbonic acid method, so that the technology is simple, the quality index of the sugar juice is improved, the product quality is good, the energy is saved, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to sugar production, in particular to the production technology of refined sugar, more specifically to a method for producing refined sugar in one-step efficient decolorization of ion exchange fiber. Background technique [0002] With the improvement of people's living standards, people have put forward higher requirements for the quality of white sugar, and the technology of refined sugar has been gradually developed. The existing refined sugar process uses a two-step method, that is, raw sugar is first made, and after the raw sugar is redissolved, it is decolorized by active carbon and ion exchange resin to make refined syrup, and then crystallized into refined sugar. The disadvantage of this process is the need for secondary crystallization, increased steam consumption, and increased energy consumption; the traditional sulfitic and carbonic acid methods can only cook farmland white sugar, and the quality can reach the standard ...

AI Technical Summary

Problems solved by technology

[0010] The clarified sugar juice needs to be decolorized and refined. The traditional method is to use bone charcoal, which has good decolorization and ash removal efficiency, but the investment cost of equipment (especially regeneration equipment) is large, and new sugar factories are rarely used.

After the 1970s, granular activated carbon and ion exchange resins were widely used to remove pigment and ash more thoroughly. They can be regenerated but the cost is high. Some sugar factories also use powdered activated carbon.

The shortcomings of this method exposed in use are that non-sugar substances are introduced into the sugar juice, so that the quality of the syrup and the final sucrose crystals will be affected by the addition of reagents that make the syrup alkaline, and sulfur will be present in the sucrose. residues in crystals

[0019] Although ion exchange resins have been widely used in the decolorization process of syrup, there are still obvious disadvantages. The main reason is that ion exchange resins have a macroporous structure, and their decolorization principle belongs to intra-pore exchange. Difficult to wash

At the same time, due to the slow adsorption and exchange speed of the resin, the investment in exchange equipment will be increased in the large-flow sugar production process

In addition, the regeneration of the exchange resin is slow, and the waste liquid after regeneration is difficult to recycle, causing pollution to the environment

Therefore, the ion exchange resin method still cannot meet the requirements of clear juice in sugarcane sugar factories.

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