Energy-saving preparation technology of high-quality glucose powder

Abstract

The invention discloses an energy-saving preparation technology of high-quality glucose powder. The technology comprises the following steps: by using starch as a raw material, mixing syrup, liquefying, saccharifying, decoloring and removing impurities by an ultrafiltration membrane, removing salt by ion exchange, purifying by a simulated moving bed, collecting the cut fraction with glucose content of at least 99.5%, and then, performing membrane concentration, vacuum belt drying, cooling and grinding to obtain the finished product of the high-quality glucose powder. According to the preparation technology disclosed by the invention, preparation flows of glucose are shortened, a procedure of evaporation and concentration is replaced by membrane concentration, the steam consumption is reduced, the production cost is lowered, meanwhile, the glucose decomposition loss and production of harmful by-products caused by high temperature concentration of liquid glucose are reduced, and the product quality is improved; the glucose is purified by means of the simulated moving bed technology, so that the content of impure glucose in products is decreased, and the glucose purity is up to more than 99.5%; the glucose syrup is dried by means of vacuum belt drying, and is further ground so as to form the crystalline glucose powder, so that the production efficiency is improved.

Description

technical field [0001] The invention relates to an energy-saving preparation process of high-quality glucose powder, belonging to the technical field of glucose production. Background technique [0002] Glucose, a polyhydroxy aldehyde, is the most widely distributed and important monosaccharide in the world. Pure glucose is a colorless or white crystal, not as sweet as sucrose, and easily soluble in water. Glucose plays a very important role in the field of biology. The metabolic intermediates of living cells will produce glucose, and organisms mainly obtain energy through the metabolism of glucose. In addition, glucose is widely used in food industry, biochemical industry, papermaking, textile and pharmaceutical fields. [0003] At present, the industrialized production of glucose uses starch as a raw material and is prepared by a double-enzyme method. The starch undergoes processes such as liquefaction, saccharification, activated carbon decolorization, ion exchange, vac...

AI Technical Summary

Problems solved by technology

However, the crystallization of glucose not only requires a large investment in equipment, but also takes up a lot of land, and the operation is very time-consuming. Generally, the cooling crystallization needs to be maintained for about 60 hours.

After glucose crystallization, it is very difficult to separate the crystals from the mother liquor. In industrial production, a centrifuge with high separation factor is used to filter the mother liquor and impurities, which further restricts the production efficiency of the product. In addition, the wet sugar obtained is also need drying

Therefore, the existing crystallization process line of glucose is long, resulting in high cost and low production efficiency.

[0004] Patent CN1928121A "A method for extracting high-purity glucose from saccharified glucose syrup" introduces a method for purifying glucose using a simulated moving bed. The system pressure of 0.9-1.2Mpa is used for chromatographic separation. The excessively high The system pressure will cause great damage to the stationary phase calcium-type cation exchange resin. In addition, the high pressure will cause high energy consumption of the system; the stationary phase of the chromatographic separation system uses calcium-type cations as the adsorbent. The volume will shrink and expand, causing damage to the resin; at the same time, due to the high water content in the resin, it cannot withstand drying and freezing, otherwise it will cause permanent damage, thus limiting the use area and scope of this process