一、概述醪塔是生产溶剂的主要设备之一,其作用是将发酵醪液中的2%溶剂提浓到50%左右,塔底用蒸汽直接加热,进料介质为发酵醪,在发醇醪中含有2%的丙酮、丁醇、0.2%的有机酸、3%固形物。我厂自1956年投产以来,由于醪塔塔体及内构件的腐蚀,差不多要每年对醪塔检修一次,并要更换部分筒体及内构件。为解决这一腐蚀问题,我们采用了上钢三厂试制的 First, an overview Mash tower is one of the major equipment for solvent production. Its function is to concentrate 2% of the solvent in the fermentation broth to about 50%. The bottom of the tower is heated with steam directly. The feed medium is fermented mash, Mash contains 2% acetone, butanol, 0.2% organic acid, 3% solids. Since the plant was put into operation in 1956, due to the corrosion of the mash tower body and the internal components, it is necessary to repair the mash tower once a year, and to replace part of the cylinder body and the internal components. In order to solve this corrosion problem, we have adopted the trial of the third steel factory