White Flakes Preparation
White flakes preparation process includes Cleaning, Dehydrating, Dehulling and Flaking. In this process, we preserve the water-soluble protein, meanwhile, prepare the soybean flakes for solvent extraction.
Typically extracted wet soybean flakes are removed of solvents, dried and cooled in a Desolventizer, Toaster, Dryer, Cooler, short DTDC. A meal with high or low protein content is created for further use in the feed mill industry.
The white flakes process differs mainly from the traditional meal process in desolventizing at a lower temperature without denaturing the proteins, to produce white flakes destined to human consumption.
Myande Low-temperature Desolventizing Drum is intended to produce white flakes for the production of white flour and grits, of extruded and textured soy protein, or for the production of other soy-protein products for human consumption.
Moisture and temperature of soybean are adjusted by Vertical Conditioner, so that soybean can be easy to be shaped. The process aims to achieve high dehulling rate, small powder degree and low protein denaturation.
Jet Dryer is widely used to heat soybean for a relatively short time for easy dehulling and minimize protein denaturation.
3. Cracking and Dehulling
The purpose of cracking and dehulling is to improve protein content and reduce fiber content of soybean meal. In addition, it can enhance extracting efficiency and reduce residual oil contained in the hull.
The purpose of softening is to adjust the moisture and temperature of soybean, in order to make soybean easily to be shaped. Meanwhile, the stirring fin can loosen soybean skin and greatly improve the peeling rate of the subsequent peeling system.
The purpose of flaking section is to destroy the cells of soybean and increase the surface area, in order to improve the efficiency of expanding and solvent extraction. Flaking mill is designed to flake the broken soybean into thins flakes (thickness from 0.3 to 0.4mm). Flakes thickness can be adjusted by adjustment of pressure between rolls. Soybean flakes will be conveyed to the solvent extraction plant.
6. Hulls Crushing
The purpose of soybean hulls crushing is to change bulk density and sense of hulls for subsequent processing of aging and pelleting sections. The granules of crushed soybean hulls should not differ too much from which of crushed soybean meal. So the quality of finished soybean meal will not be affected by blending such crushed soybean hulls while achieving the purpose of adjusting protein content in finished meal.
7. Aging and Pelleting
The main purpose of bean hulls aging is to sterilize crushed soybean hulls. The direct steam and soybean hulls are evenly mixed under a certain temperature and time to achieve the purpose of sterilizing and enzyme deactivation. Then the moisture and temperature of soybean hulls are reduced by dry hot air, so as to be subsequently added to soybean meal or directly pelleted.
The main purpose of pelleting section is to increase the bulk density and fluidity of soybean hulls, which is beneficial for later transportation and other processing.
- Oils & Fats
- Starch & Derivatives
- Meal Fermentation
- Evaporation & Crystallization