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海冰盐度主要来自海水结冰时被包裹在内部的卤水盐胞,海冰离心脱盐方法正是依据此,将海冰破碎,使卤水暴露出来,进而施加超重力,脱除卤水,淡化海冰。本文通过理论分析得出海冰离心脱盐后盐度与时间的理论关系式为S(t)=PK1/t,采用该式的计算结果与文献中的实验数据对比表明两者吻合较好。在理论分析基础上,通过实验确定了粒度、分离因数和加入海水比例对海冰离心脱盐的影响。实验结果表明,淡化盐度随着粒径呈现先减小后增大的趋势,并且当颗粒在6～9mm左右达到最小;随着加入海水比例和分离因数的增大,海冰离心脱盐效果变好。
The sea ice salinity mainly comes from brine salt and salt cells which are encased in seawater when it is frozen. The method of centrifugal desalination by sea ice is based on this, which breaks the sea ice and exposes the brine to excess gravity, removes the brine and desalinates ice. In this paper, theoretical analysis shows that the theoretical relationship between salinity and time after sea ice centrifugal desalination is S (t) = PK1 / t. Comparing the calculated results with the experimental data in the literature shows that the agreement between them is good. Based on the theoretical analysis, the influence of particle size, separation factor and proportion of added seawater on centrifugal desalination of sea ice was experimentally determined. The experimental results show that the desalination salinity decreases first and then increases with the particle size, and reaches the minimum when the particle size is about 6 ~ 9mm. With the increase of seawater proportion and separation factor, the sea ice centrifugal desalination effect becomes it is good.