提出了多级正渗透的盐差发电工艺，相比单级正渗透过程，多级过程产电性能明显提高. 对多级正渗透模型进行模拟，考察了浓盐水流量和预加压力对产电功率的影响. 结果表明，其它条件一定时，随浓盐水流量或预加压力增大，产电功率均先增加后减少，存在最大值. 以100 m2膜的产电功率为目标函数，对不同的压力能回收效率，建立了以浓盐水流量和预加压力为决策变量的优化模型，优化结果表明，不同的压力能回收效率对应不同的浓盐水流量和预加压力的最优解，且压力能回收效率越高，对应的浓盐水流量越小，预加压力越大.
The configuration of multistage forward osmosis power generation was introduced and electricity generation performance was improved effectively compared with the single-stage forward osmosis configuration. Simulation analysis is carried out on the configuration of multistage forward osmosis power generation and the effect of concentrated brine flow and preload pressure on the power output was analyzed. The results showed that the power output increased at first and then decreased with the increasing of concentrated brine flow or preload pressure and there existed a highest value. For different energy recovery efficiency, optimization model with the maximum the power output of 100 m2 osmotic membrane as the objective and with concentrated brine flow and preload pressure as the decision variables was established. As a result, there were different optimum solutions concentrated brine flow and preload pressure for different power recovery. It showed that concentrated brine flow decreased and preload pressure increased with the increasing of power recovery.
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