利用火电机组余热能的热膜耦合海水淡化性能分析

发布时间：2018-07-20 19:48

【摘要】：以沿海电厂汽轮发电机组抽汽作为热源,针对反渗透(RO)和低温多效蒸馏(LT-MED)海水淡化技术各自的特点,提出2种水电联产海水淡化方案,并进行性能分析:1种是传统的蒸汽压缩喷射器(TVC)与低温多效蒸馏系统结合的MED-TVC方案;另1种是利用电厂汽轮机抽汽余热能发电驱动反渗透膜,通过热膜耦合技术将低温多效蒸馏与反渗透海水淡化产水集成的RO-MED方案。结合某实际火电机组已经运行的海水淡化项目,建立数学模型,对2种方案的淡水产量进行了比较分析。结果表明,RO-MED方案的淡水产量约为38.26 kt/d,远大于MED-TVC方案11 kt/d的产水量。但受投资成本、运行成本、安全性等条件的制约,在实际生产中还需要依据具体情况进行选择。
[Abstract]:Taking steam turbine generator unit from coastal power plant as heat source, 2 water desalination schemes for water desalination are proposed in view of reverse osmosis (RO) and low temperature multi effect distillation (LT-MED) desalination technology, and the performance analysis is carried out. The 1 is the traditional MED-TVC scheme combining TVC with low temperature multi effect distillation system; the other 1 are the other 1. Using the waste heat energy of steam turbine in power plant to drive the reverse osmosis membrane and the RO-MED scheme to integrate the low-temperature multi effect distillation with the reverse osmosis seawater desalination by the thermal film coupling technology, a mathematical model is set up in combination with the seawater desalination project which has been operated by a practical thermal power unit. The results of the fresh water production of the 2 cases are compared and analyzed. The fresh water output of the RO-MED scheme is about 38.26 kt/d, which is far greater than the water production of the MED-TVC scheme 11 kt/d, but it is restricted by the cost of investment, operating cost and safety, and the actual production needs to be selected according to the specific conditions.
【作者单位】：电站设备状态监测与控制教育部重点实验室(华北电力大学);
【基金】：国家重点基础研究发展计划项目(973项目)(2015CB251503) 国家自然科学基金项目(U1361108)
【分类号】：P747

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