冷能利用片冰机海水淡化动态仿真

介绍了一种新型的冷冻海水淡化技术。到2019年末，液化天然气（LNG）生产能力已达4.3亿吨/年。LNG从再气化过程中释放出的巨大冷能量可用于冷冻脱盐过程，以最大限度地降低总能耗。本文采用HYSYS软件设计并仿真了利用LNG冷能的片冰机冷冻海水淡化（FD）过程。采用片冰机上的制冰桶作为海水结晶器，主要是由于其连续制冰和除冰无热源。利用gPROMS软件建立了冻结段的动态模型并进行了仿真。结果表明，用1kg当量液化天然气冷能可获得1.9~2.1kg的冰融水，该混合工艺的制冷剂泵功率能耗为3.725Wh/100kg，可忽略不计。

Dynamic simulation of cold energy desalination using ice-sheet machine

A new technology of frozen seawater desalination for agricultural irrigation and livestock drinking water is introduced. Currently, liquefied natural gas (LNG) production capacity has reached 290 million tons/year. The huge cold energy released from the regasification process of LNG can be used in the freezing desalination process to minimize the total energy consumption. The FD process of ice sheet machine using LNG cold energy was designed and simulated by using HYSYS software. The ice making bucket of the ice sheet machine is used as the sea water crystallizer mainly because it has no heat source for continuous ice making and deicing. The dynamic model of the frozen section is established and simulated by gPROMS software. The results show that about 1.9—2.1kg of ice melt water can be obtained with 1kg equivalent of LNG cold energy. The results show that the energy consumption of the hybrid process is negligible (3.725Wh/100kg).