卷式膜元件反渗透脱硼海水淡化系统多目标优化研究

发布时间：2018-06-08 03:52

  本文选题：反渗透 + 海水淡化　； 参考：《水处理技术》2017年10期

【摘要】：对卷式膜元件反渗透脱硼海水淡化网络系统进行多目标优化。采用不可逆热力学模型描述盐和硼的跨膜传质过程,加入系统流量约束保障反渗透系统安全运行。采用增强型ε-约束算法对多目标优化问题进行求解,引入模糊决策法在Pareto非劣解中筛选优化折中解。对于特定的装置参数,优化方案均采用二级反渗透系统,反渗透方案的成本在0.72～0.97$/m~3、能耗在3.09～3.96 k W h/m~3。随着成本的降低,系统回收率呈增加趋势,一级反渗透的压力容器个数逐渐降低,操作压力和压力容器内产水通量逐渐增加,而二级反渗透上述参数变化不大,进水p H保持在10.4~11.0以保证系统脱硼率。通过成本构成分析可知,将第1级反渗透平均通量控制在14.0 L/(m~3·h)时在经济与能耗上较为均衡。
[Abstract]:The multi-objective optimization of the reel membrane element reverse osmosis desalination seawater desalination network system was carried out. The irreversible thermodynamic model is used to describe the mass transfer process of salt and boron, and the flow constraints are added to ensure the safe operation of the reverse osmosis system. The enhanced 蔚 -constraint algorithm is used to solve the multi-objective optimization problem, and the fuzzy decision method is introduced to select the optimal compromise solution in the Pareto non-inferior solution. For the specific equipment parameters, the optimized scheme adopts the two-stage reverse osmosis system. The cost of the reverse osmosis scheme is 0.97 / mm3, and the energy consumption is 3.09 ~ 3.96 kh / m ~ (-1). With the decrease of cost, the recovery rate of the system increases, the number of pressure vessels of first order reverse osmosis decreases gradually, the operating pressure and water flux in pressure vessels increase gradually, but the above parameters of secondary reverse osmosis do not change much. The influent pH was maintained at 10.4 ~ 11.0 to ensure the deborization rate of the system. The cost composition analysis shows that the economy and energy consumption are more balanced when the average flux of the first stage reverse osmosis is controlled at 14.0 L / m ~ (-1) h.
【作者单位】： 河北工业大学海洋科学与工程学院海水资源高效利用化工技术教育部工程研究中心;天津大学化工学院;天津大学天津市膜科学与海水淡化技术重点实验室;河北工业大学化工学院;
【基金】：国家自然科学基金项目(21606067,21306037) 河北省自然科学基金项目(B2014202082) 河北省高等学校青年拔尖人才计划项目(BJ2016016) 国家科技支撑计划项目(2015BAB10B01)
【分类号】：P747
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本文编号：1994333