Reaction product separation system for methanol-to-propylene and methanol-to-olefin

The utility model provides a reaction product separation system for methanol-to-propylene and methanol-to-olefin. The system comprises a depropanizing tower (1), an ethylene rectification tower (7) and a propylene rectification tower (15), wherein the tower top of the depropanizing tower (1) is connected with a demethanizing tower (5); the tower bottom of the demethanizing tower (5) is connected with a deethanizing tower (6); the tower top of the deethanizing tower (6) is connected with the ethylene rectification tower (7); the tower bottom of the deethanizing tower (6) is connected with the propylene rectification tower (15). The utility model aims to provide a separation system, thus simplifying the process, reducing the energy consumption, and improving the olefin yield.