Process and system for reducing production energy consumption of ethyl acetate

The invention relates to a process and system for reducing energy consumption in ethyl acetate production, and the process comprises the following steps: (1) extraction of ethanol in crude ester: the crude ester from an esterification tower enters extraction equipment to contact with an extraction agent, and the extracted crude ester is concentrated; and (2) recovery of the extraction agent: the extracted extraction phase enters an extraction agent recovery device, and the recovered extraction agent is reused in the extraction equipment. In order to reduce the energy consumption of a concentration tower, an extraction unit is additionally arranged between a liquid-liquid separation tank at the top of an esterification tower and the concentration tower, an extraction agent is used for reducing the concentration of ethanol in crude ester and increasing the content of ethyl ester in the crude ester, a small amount of ethanol in an extraction phase is separated and then returns to an esterification system, and th