关键词:

水合物, 油水乳液, 吸收-水合, 分离塔

Abstract:

The hydrate separation tower is the most important unit operation equipment in the process of separating pyrolysis gas with the aid of hydrate technique for recovering ethylene.The water-in-oil emulsion could enhance the hydrate formation rate and improve the flow behavior of hydrate slurry.In this work，the simulation algorithm of absorption-hydration separation tower for the water-in-oil emulsion system was developed，which was involved with the vapor-liquid-liquid-hydrate four phase equilibria.The operation conditions，separation efficiency and energy consumption of the hydrate separation tower were studied under the different gas-liquid ratio conditions by combining the equilibrium and non-equilibrium stage approach.The calculation results indicated that the lower gas-liquid ratio could improve the separation efficiency，but may bring about the high energy consumption.The results also showed that hydrogen and methane could be separated effectively from C₂ plus-components at around 0℃ through hydrate technique.The calculation results are of significance for the design of hydrate separation equipment，the determination of operation conditions and the planning of separation process for the ethylene pyrolysis gas.

Key words:

水合物, 油水乳液, 吸收-水合, 分离塔