1、 Overview of Yeast Extracts
Yeast extract is a brownish yellow soluble paste or light yellow powder product made from protein rich edible yeast as raw material according to the regulations of the Chinese Pharmacopoeia, using modern biological high-tech such as autolysis, enzymatic hydrolysis, separation, and concentration to degrade the proteins, nucleic acids, etc. in yeast cells and refine them. It is an excellent natural seasoning with wide applications in the food industry. It is also the most ideal raw material for biological culture media and the main raw material in the fermentation industry. Its efficacy is equivalent to 8 times that of yeast, which can greatly improve the production rate of bacterial strains and the yield of fermented products.
2、Advantages of Yeast Extract Dryer
1) Using circulating hot water as a heat source to improve drying efficiency;
2) The drying conditions are mild, and the product temperature is relatively low, maintained at approximately 70 ℃;
3) Operating under low temperature and normal pressure conditions can effectively preserve the color and nutrients of the product, reducing the degree of oxidation of the product;
4) The drying time is about 3-5 minutes short;
5) Can dry most liquid materials without the need for non sugar carriers;
6) Adopting modular design, capable of continuous operation;
7) Low energy consumption.
3、Yeast Extract Dryer Principle：
The time of the Yeast Extract Dryer heating process can be short to only a few minutes. The ingredients in the materials in the drying process are exposed at a gentle heating temperature, which can reduce the component loss of the material, and the product has a good sensory quality. Spray drying, as a process of indirect drying, the product does not directly contact the heat transfer medium, and there is no cross -pollution; the state requirement of the dry material is not high; the processing water is in circulation use, and the heat is mainly transmitted to the material through infrared radiation, which improves energy utilization rate.
4、Yeast Extract Dryer Drying conditions：
The factors that restrict dryness on Yeast Extract Dryer include air inlet temperature, exhaust temperature, air humidity, dry air volume, material liquid treatment, water evaporation, dry room diameter, dry room volume, particle diameter.
When designing the above factors, according to the characteristics of dry materials, the particle size and processing of the required product are determined, especially the diameter and volume of the dry chamber. Because they are indispensable factors, it is not possible to make too many adjustments based on this. Therefore, before the design of the Refractive window dryer, it is very necessary to select appropriate drying conditions on a small test machine.
