太阳能层叠式膜蒸馏组件实验研究

RESEARCH ON SOLAR ENERGY CASCADING MEMBRANE DISTILLATION COMPONENT EXPERIMENT

本文设计了一种适用于太阳能膜蒸馏技术的新型层叠式空气隙膜蒸馏组件,该组件结构紧凑,可由冷、热、冷等N层容腔并联运行,膜组件中的分水盘使热溶液调整为沿着膜面切向方向的旋转入流,削弱了膜面附近的温度和浓度极化,提高了膜通量。以自来水为热工质,实验研究了不同膜材料温度和流量对膜通量的影响,工质温度70℃,流量300L/h时其产水通量可达50 kg/m^2.h。如运行10个热容腔,每10 h产水为142 kg,可以解决一家人的正常用水。以太阳能作为组件的加热热源,分析了3 m^2集热系统在自然循环状态下,集热器出口温度、水箱温度和太阳辐射对膜通量的影响,为应用太阳能膜蒸馏解决西部地区苦咸水淡化奠定了实验基础。

This paper designs a kind of applicable to the solar membrane distillation technology is a new type of cascading air gap membrane distillation component, the component structure is compact, can be made of cold, heat, cold and other n-tier chamber should run in parallel, membrane module of the baffle plate heat solution is adjusted for the rotation of the tangential direction along the membrane surface inflow, weakened near the membrane surface temperature and the concentration polarization and increase the membrane flux. the experimental study on the heat with tap water as working medium, different membrane materials, the influence of temperature and flow rate on membrane flux, working medium temperature 70 ℃, flow 300 l/h when its production water flux can be up to 50 kg/m^2.H. such as running 10 heat capacity cavity, every 10 h water production is 142 kg, can solve the family＇s normal water. In solar energy as heat source of heat of components, 3 m^2 heating system are analyzed in the condition of natural circulation, the outlet temperature of the collector, water tank temperature and solar radiation on the membrane flux and the effect of membrane distillation the application of solar energy to solve in the western region brackish water desalination laid the foundation experiment.