Propylene carbonate production system

The utility model belongs to the technical field of preparation of propylene carbonate, and particularly relates to a production system of propylene carbonate. The propylene carbonate production system provided by the utility model comprises a pre-synthesis unit, a first reactor, a second reactor, an evaporation unit and a crude product storage unit which are communicated in sequence, the pre-synthesis unit comprises a first pre-reactor, a second pre-reactor, a third pre-reactor, a fourth pre-reactor, a fifth pre-reactor, a sixth pre-reactor, a seventh pre-reactor and an eighth pre-reactor which are communicated in sequence; the first reactor is provided with a first bottom discharge port and a second bottom discharge port; and the first bottom discharge port and the top feed port of the first pre-reactor form circulation through a circulating pump. According to the utility model, a multi-stage reaction mode is adopted, so that the purity and the yield of propylene carbonate are improved. 本实用新型属于碳酸丙烯酯制备技术领域，具