Vegetable oilseeds are inseparable from pre-conditioning and softening or frying in the process of oil production. In modern soybean processing, vertical conditioning towers are widely used. However, in actual operation, how to operate, how to adjust the heating amount, air volume, and air temperature of soybeans in each heating layer and hot air layer of the conditioning tower, so that the temperature rise rate of soybeans in each heating layer of the conditioning tower is less than that of water. It is more beneficial to adjust the content, and the most reasonable effect on conditioning and softening soybeans? For this topic, I would like to make an exchange with you, with a view to improving together.

In order to obtain the ideal tempering effect, after the soybean is heated, it should be kept warm for a period of time, so that the inside and outside of the soybean can be heated evenly, and similar changes can occur in the interior of all cells, which plays a role in slowing down, so as to facilitate the increase of the viscosity of the oil droplets in the cells. decrease, or increase its mobility. At the same time, the excess water inside the soybeans can also be heated and volatilized relatively evenly at a relatively high temperature, and have sufficient time to disperse to the surface of the soybeans, and can be more effectively dissolved into the hot air and carried along with the hot air. Out of the conditioning tower. Therefore, for the above three types of heating methods, I personally think that the heating method shown in Figure 3 is the most reasonable.

For the use of hot air in the conditioning tower, the heating process should be adjusted by controlling and adjusting the air volume and air temperature of the fan on the basis of reasonable heating of the soybeans, so that the soybeans can meet the temperature requirements at the outlet of the conditioning tower while the moisture content Able to stay within the 10-10.5% range.

From the process of soybean conditioning treatment, it can be known that the temperature of soybeans is relatively low in the uppermost layers of the conditioning tower, and the amount of moisture inside the soybeans is less volatilized by heating. However, the hot air with high temperature and small flow rate helps to accelerate the uniform heating process of soybeans. In the middle and lower part of the tempering tower, the temperature of soybeans is relatively high, and it is in the stage of continuing to heat up, keep warm, and slow down. At this stage, hot air with a moderately high temperature can effectively remove excess water in soybeans.