The bean washing and soaking equipment is the first step in the factory’s soybean product manufacturing process. The complete system includes a vacuum bean suction device, storage hopper, sliding bean distribution device, bean distribution track, soaking tank, stainless steel operating platform, stainless steel stairs, PLC automatic control system, automatic water filling system, water level detection device, aeration device, trough filtering device, and vibrating filter screen. The equipment has washing, soaking, draining, and filtering functions. The entire machine is made of stainless steel, except for special parts.
Features:
(1) Automatic feeding – precise vacuum control for soybean suction, eliminating manual handling.
(2) Programmable soaking – adjustable soaking time for optimal results.
(3) Automatic cleaning – intelligent water distribution and rinsing for efficient cleaning and water saving.
(4) Drainage and conveying – the cleaned soybeans are automatically discharged to the next production stage.
Soaking: This refers to allowing soybeans to fully absorb water. After the protein membrane of the soybean absorbs water and swells, its texture changes from hard to brittle and then soft. In the brittle state, the protein membrane is easily broken when ground. After the protein membrane breaks, the protein can disperse in the water, forming a protein colloid, which is soy milk.
Why is an automatic soybean soaking and washing machine needed?
An automatic soybean soaking and washing machine can vacuum-suck soybeans, add water quantitatively, repeatedly wash and soak them for a set time. It uses compressed air injected into the water to agitate the soybeans, ensuring thorough soaking and washing, and allowing damaged soybeans and other impurities to float on the surface. The soaked soybeans and water flow down the trough to a vibrating filter screen, which removes stones, sand, and impurities. The properly soaked and clean soybeans will not affect the taste and quality of soy milk and tofu.
Usually, to meet daily production needs, most workers need to soak and wash soybeans in the early morning. After soaking, manual filtering is required, which is labor-intensive and time-consuming. An automatic soybean soaking and washing machine can set the start time for soaking, add water quantitatively, inject compressed air at regular intervals to agitate the soybeans, and automatically filter out the clean soybeans.
Generally, in spring and autumn, soaking is done at 10-12℃ for 12-15 hours; in summer, at 28-33℃ for 5-7 hours; and in winter, for 15-22 hours. In summer, soak the beans until they are about 80% cooked, with a slightly concave shape in the center of the bean and a darker color in the middle. In winter, they can be soaked until about 90% cooked, with the bean becoming milky white and the center light yellow.
