大豆脱皮工艺和生产等级大豆粕探讨

Soybean Dehulling process and production of grade soybean meal

目前主要存在两种大豆脱皮工艺,即Crown＆Buhler热脱皮和De Smet冷脱皮。按原大豆蛋白含量35%,按不同的含杂和含油量进行不同程度的脱皮,可使大豆粕蛋白含量达47 5%～49 0%。按市场饲用等级豆粕的价值和价格,生产出蛋白含量分别为44%、46%、48%豆粕。比较了等级豆粕两种脱皮工艺特点及参数,认为热脱皮因只一次加热节约能源,对豆粕蛋白变性影响较小。同时对脱皮效果进行了效益分析。

At present, there are two kinds of dehulling systems , Crown & Buhler hot dehulling system and De-Smet cold dehulling system, applied in soybean crushing industry. Based on the soybean containing 35% protein and different content of impurities and oil, the soybean should be dehulled in different degree to produce the soybean meal containing protein content in 47.5%～49%. For satisfying the requirement of the feed-grade soybean meal in local market,the grade soybean meal containing protein as 44%, 46%, 48% should be produced.Main parameters and process in both dehulling system was compared, the results show that the energy is saved and the protein function denature in low grade in hot dehulling process because of heating once.Finally the financial appraisal of the production is concluded.