摘要
低温多效海水淡化装置的蒸发温度不高于70℃,设备需在真空环境下运行,因此,真空度的保持是整个系统稳定运行的重要保障。本文对海水淡化系统中不凝气体析出量、空气泄漏量以及携带蒸汽量等参数的传统计算方法,进行了分析并提出了修订及改进。结合低温多效海水真空系统抽气量的具体案例给出了详细计算过程和结果,为低温多效海水淡化装置的真空系统的计算机辅助设计和选型提供理论支持。
The influence of the release of non-condensable gas,escape of steam,and leakage of air on the optimized pumping-capacity,required to keep a pressure below 90 kPa in low-temperature multi-effect desalination(LT-MED)of seawater,was mathematically modeled and theoretically calculated.The original work was a more precise approximation of CO2-release and air-leakage.For instance,the dependence of CO2-release on the realistic situations,including but not limited to the initial temperature,evaporation temperature,salt solubility,pH-value,flow-rate and volume of the seawater-intake,could be calculated analytically and/or numerically.Moreover,the air-leakage was approximated to be a function of pressure and volume.The tentative discussions focused on the detailed calculation of specific cases.We suggest that the self-modified calculation,closer to the realistic situation,be of some basic and technological interest in development of LT-MED of seawater technology on industrial scale.
作者
赵洁莲
韩延民
Zhao Jielian;Han Yanmin(Zhejiang Haiyan Power System Resources Environmental Protection Technology Co.,Ltd,Shanghai 201801,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2019年第11期964-968,共5页
Chinese Journal of Vacuum Science and Technology
