基于LNG冷能海水冷冻淡化系统的研究

发布时间：2018-01-16 10:32

本文关键词：基于LNG冷能海水冷冻淡化系统的研究　出处：《青岛科技大学》2016年硕士论文　论文类型：学位论文

更多相关文章： LNG冷能 冷冻淡化 结晶器 ?效率

【摘要】：由于不合理的水资源开发,水污染严重,极大地减少了有限的水资源利用量,水资源短缺严重影响到经济的发展。中国大多数LNG接收站位于沿海地区,LNG通过管道供给用户之前,要进行汽化成常温气体,造成了LNG冷能的浪费,LNG冷能与海水淡化技术结合,能够解决了沿海地区的淡水资源短缺的问题,本文研发了一套基于LNG冷能海水冷冻淡化系统。本论文在青岛黄岛区科技局海洋科技专项资助下,研究的基于LNG冷能海水冷冻淡化系统主要由结晶器、转筒、收集桶、间歇驱动装置、换热器、电机等部件组成,经过查阅相关文献,比较各种冷冻法工艺优缺点,选择最佳合适于基于LNG能海水冷冻淡化系统的冷冻法。通过Aspen Plus模拟,有相变流程优于无相变流程,通过模拟冷媒压力、冷媒流量、NG压力、LNG流量、海水流量等主要参数对系统工艺流程各个设备的?值影响,分析了各个参数对系统和关键设备?效率影响趋势,选出合适的工艺参数。根据模拟的工艺参数,按照国家相关设计标准,对该系统装置的关键设备结晶器、转筒、收集桶进行设计计算,并对间歇驱动装置、电机等主要辅助部件进行了选型。本论文研究的基于LNG冷能海水冷冻淡化系统能够连续且高效冷冻淡化海水,装置操作简单,维护方便,将为解决沿海地区淡水资源短缺的问题提供理论基础。对于LNG资源产业的经济效益、保护环境具有重要的意义和应用前景。
[Abstract]:Due to unreasonable exploitation of water resources and serious water pollution, the limited utilization of water resources has been greatly reduced, and the shortage of water resources has seriously affected the economic development. Most of the LNG receiving stations in China are located in coastal areas. LNG should be vaporized to normal temperature gas before it can be supplied through pipeline, which results in the waste of LNG cold energy and the combination of LNG cold energy and seawater desalination technology. In order to solve the shortage of fresh water resources in coastal areas, this paper developed a set of cold energy seawater refrigeration and desalination system based on LNG. This paper is supported by the marine science and technology of Qingdao Huangdao District Science and Technology Bureau. The cold energy seawater refrigeration desalination system based on LNG is mainly composed of crystallizer, drum, collecting barrel, intermittent drive device, heat exchanger, motor and so on. By comparing the advantages and disadvantages of various freezing processes, the best method is selected for the freeze-desalination system based on LNG. Through Aspen Plus simulation, the phase change process is better than that without phase change process. By simulating the main parameters of refrigerant pressure, refrigerant flow, NG pressure and LNG flow, sea water flow, etc., for each equipment of the system process? The effect of each parameter on the system and key equipment is analyzed. According to the simulation process parameters, according to the national relevant design standards, the key equipment of the system mold, drum, collection barrel design calculation. The main auxiliary parts, such as intermittent drive device, motor and so on, are selected. The cold energy seawater refrigeration desalination system based on LNG can be used continuously and efficiently, and the device is simple to operate. The convenience of maintenance will provide a theoretical basis for solving the problem of shortage of freshwater resources in coastal areas. It is of great significance and application prospect for the economic benefit of LNG resource industry and the protection of environment.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P747

【参考文献】