Method and apparatus for continuously preparing ethyl acetate by single tower

The single tower ethyl acetate preparing process includes boiling the mixed liquid in certain acid/alcohol ratio and with strong acid catalyst and water carrying agent inside tower; opening condensating water for full reflux operation and stable top temperature after the vapor reaches to tower top; regulating acid/alcohol ratio to 1 and feeding strong acid catalyst from the top; regulating certain reflux ratio with the reflux ratio regulator, taking coarse ester product from the top and maintaining the top temperature unchanged; discharging gas material from the bottom, condensating in condensator, separating water in phase separator and refluxing organic phase with rich water carrying agent to the tower. The present invention has ester content in coarse ester product over 94 %, high conversion rate, low power consumption and low production cost.