采用三塔提纯的模式，三塔均为常压操作，一塔脱出乙醛；二塔脱乙醇，脱出的

The three-tower purification mode is adopted. The three towers are all operated at atmospheric pressure. One tower removes acetaldehyde; the second tower removes ethanol, and the removed ethanol is used to produce catalyst; the third tower removes heavy components from the bottom of the tower and obtains the product on the top of the tower. Design a small tower to separate the heavy components from the third tower, thereby effectively separating and producing pure by-product acetal, so that the by-product can be effectively used

Using the three-tower purification mode, the three towers are normal pressure operation, one tower out of acetaldehyde, two towers of deethanol, the ethanol is used to produce catalysts, the third tower, the tower out of the reorganization points, the tower to get products, while designing a small tower to separate the third tower to obtain the reorganization points, so as to effectively separate and produce a purer by-product acetaldehyde, so that by-products can be used very effectively

Three columns were used to purify acetaldehyde; The second tower is used to remove ethanol, which is then used to produce catalyst; At the same time, a small tower is designed to separate the heavy components from the third tower, so as to effectively separate and produce pure by-product acetal, so that the by-product can be used effectively<br>