Method and system for removing acetal through dehydration reaction in BDO refining process

The invention relates to a method and a system for removing acetal through a dehydration reaction in a BDO refining process, the method is characterized in that 1, 4-butanediol is converted into tetrahydrofuran through the dehydration reaction, the tetrahydrofuran is recovered through rectification, and the acetal is removed so as to achieve the purpose of removing the acetal, and the method specifically comprises the following steps: a, vaporizing raw materials; b, dehydration reaction; c, product rectification, compared with an existing method for removing acetal through hydrogenation or dehydrogenation in the 1, 4-butanediol refining process, the method is more energy-saving, the technological process is simpler, the conversion rate of 1, 4-butanediol is 98% or above, the selectivity of tetrahydrofuran is 99% or above, various acetal in the BDO product can be effectively removed, and the economic benefits of a 1, 4-butanediol production device are improved. 一种BDO精制过程中脱水反应除缩醛的方法及系统，该方法通过1,4-丁二醇脱水反应转化为四氢呋喃，精