The two types of distiller's grains of the largest output in China are: white distiller's grains and beer grains, both containing high levels of protein and other nutrients. The protein feed back to vinasse is also widely recognized by the animal feed industry and the aquaculture industry. The drying of distiller's grains is mainly of direct drying by hot air and indirect drying by steam.
Indirect-heating type dryers to treat vinasse include: paddle dryers, tray dryers, tube bundle dryers, and the like. The principle of indirect heating is to transfer heat energy to a medium through a heat exchange gas. The medium circulates in a closed loop and is not in direct contact with the material being dried. The nutrient material of the vinasse dried by this process is not easy to be destroyed, but there is a certain heat loss, and the yield is not high.And if it were the high-humidity sticky material, it can easily get stuck to the wall and agglomerate.
Direct heating type vinasse dryer includes: fluidized bed dryer, belt dryer, low temperature and high air volume vinasse dryer. Traditional dryer is used for direct heating, the hot air is directly in contact with the wet material. Although the heat utilization rate is high, the high temperature also leads to the coking of the nutrients in the vinasse, thereby reducing the quality of vinasse.
The vinasse dryer produced by the energy-saving company China ZJN features many patented technologies yielded by continuous exploration and practice, such as “low temperature and large air volume” and “Rotary-harrow Material-crushing Triple-phase Multi-loop.”The featured relatively lower hot air temperature accompanying appropriately increased wind speed can improve the drying efficiency. The dried distiller's grains display lovely color and are of high quality, and the nutrient content of the distiller's grains is not easily destroyed. Moreover, the heat utilization rate of the equipment is high, and the daily output can reach 100 tons. The unique "rotary-harrow crushing device" can adapt to various high-humidity and sticky materials, hence promising for a wide application.
