大豆油精炼新型逆流脱色工艺

油脂脱色是油脂精炼过程中的重要步骤。对大豆油精炼生产中采用的新型连续式逆流脱色工艺进行了介绍,该工艺配有2个脱色罐和2种过滤机(脉冲过滤机和叶片过滤机),使用过一次的脱色剂在脉冲过滤机中过滤后,以滤浆的形式加到中和油中进行预脱色,然后在叶片过滤机中过滤后作为废脱色剂排出,预脱色主要脱除油中的皂和磷脂,新鲜脱色剂与预脱色过的油进行二次脱色,主要脱除油中的色素。实践表明:逆流脱色工艺与传统脱色工艺相比可以节约30%的脱色剂,可提高油脂得率,降低污染物排放,节约生产成本,取得了良好的经济效益。

Practice of noval counter-current bleaching process in soybean oil refining

Oil bleaching unit is an important process in refinery plant. Continuous counter-current bleaching process used in soybean oil refining was introduced, and two bleaching tanks and two filters (pulse filter and leaf filter)were used in the process.The spent decolorant was filtered in pulse filter, then added to the neutralized oil in the form of filter slurry for pre-bleaching, and then filtered in the leaf filter and discharged as waste decolorant.The pre-bleaching stage mainly removed soaps and phosphatides. The fresh decolorant was mixed with pre-bleached oil in the second bleaching stage, which mainly removed the pigments. The practice showed that compared with traditional bleaching process, counter-current bleaching could save 30% of decolorant, improve the oil yield, reduce pollutant emissions, save production costs, and achieve good economic benefits.