Energy-saving propane dehydrogenation system and method

The invention belongs to the field of propylene production, and discloses an energy-saving propane dehydrogenation system and method. The system comprises a raw material treatment unit, a dehydrogenation unit, a compression unit and a separation refrigeration unit, a raw material propane enters the dehydrogenation unit after being subjected to heavy removal by the raw material treatment unit and cold energy recovery by the separation unit, and reaction generated gas sequentially enters the compression unit and the separation unit; by adopting the method and the system disclosed by the invention, the consumption of circulating cooling water, low-pressure steam and a propylene refrigerant can be remarkably reduced, so that the energy consumption and the operation cost of the device are reduced, and the method and the system have important practical significance on energy conservation and consumption reduction of the propane dehydrogenation device. 本发明属于丙烯生产领域，公开了一种节能型丙烷脱氢系统和方法。该系统包括原料处理单元、脱氢单元、压缩单元和分离制冷单元；原料丙烷经