| 摘要 |
A vacuum system of a multistage flash desalination plant is provided to secure economic efficiency, simplify the system and reduce the consumption of low pressure steam according to the removal of vacuum condensers, and improve desalination productivity and performance according to the recovery of vent steam disused. A vacuum system of a multistage flash desalination plant comprises first ejectors(1,1a), a first gas supply pipe(6), second ejectors(2,2a), and an ATM exhaust pipe(9). The first ejectors suck in non-condensable gas comprising steam from a deaerator(130), a pre-condenser(4), and a final stage(111) of an evaporator(110) by the supply of middle pressure steam. The first gas supply pipe supplies the gas sucked by the first ejectors to a stage with a pressure similar to that of the pre-condenser to condense the gas. The second ejectors suck in the gas in the stage and supply the gas to a stage with a pressure similar to that of an ATM condenser by the supply of middle pressure steam to condense the gas. The ATM exhaust pipe emits the gas in the stage and a first stage into the atmosphere. |
