太阳灶聚光集热-减压膜蒸馏式海水淡化实验研究

AN EXPERIMENT STUDY ON SOLAR COOKER HEAT COLLECTION- VACUUM MEMBRANE DISTILLATION SEAWATER DESALINATION

综合太阳能的优点,设计构建了一种新型的太阳灶聚光集热-减压膜蒸馏式海水淡化系统装置,以太阳灶作为太阳能聚光集热系统提供热源,以质量分数为3.5%的NaCl溶液模拟海水进行了脱盐实验。研究了太阳灶作为太阳能聚光集热系统光强度和温度的变化,运用太阳灶聚光加热进料海水温度后对膜通量、截留率、淡水电导率的影响以及换热系统对淡水换热冷凝的影响作用。结果表明,当系统运行稳定,太阳灶在温度方面表现出了良好的特性,淡水的电导率均在5.59μS/cm左右,截留率达到99.9%,换热效率达到80%左右。

Integrated with the advantages Of solar energy, a new kind of solar cooker heat collection-vacuum membrane distillation seawater desalination system was designed and produced. By using solar cooker as the solar heat collection system to provide heat source and taking the mass fraction of 3.5% sodium chloride brine as feed, an experimental study of desalination was carried out. The change of light intensity and temperature by using solar cookers as the solar heat collection system was researched, and the influence of feed temperature on membrane flux, retention rate, the conductivity of freshwater by using solar cook heat collection and the effect of heat exchange system on freshwater heat exchange and condensation was investigated. The results showed that when the system ran stably, solar cooker showed good characteristics in terms of temperature, the conductivity of freshwater was about 5.59 μS/cm, retention rate was 99.9%, and heat change efficiency was about 80%.