中小型低温多效海水淡化装置绘图软件开发
发布时间：2018-08-04 13:23
【摘要】：如今,人口增长、工业发展、污染加剧造成了淡水资源的日益短缺。作为一种可以制造淡水的技术手段,海水淡化技术备受关注。其中的低温多效蒸馏技术(LT-MED)因其操作温度低,装置组合方式灵活,不易结垢,可被低品位热源驱动等优点成为海水淡化的主流方法之一。本文的研究对象为热水驱动的中小型LT-MED系统,分析总结了此类系统的工作原理和设计方法,提出了水和水蒸气物性参数的计算方法及海水沸点升高公式。基于能量与质量守恒定律,考虑流动阻力损失以及海水物性变化的影响,建立了各换热设备的数值模型,其中包括蒸发器、冷凝器、预热器和闪蒸罐等,设计了系统各参数的计算方法并给出了计算框图。采用AutoLISP语言编写了中小型LT-MED装置换热管束排布图的出图程序,完成了对AutoCAD的二次开发。借助LT-MED可视化应用软件可以得出结构参数,用户通过输入相关结构参数,等待数秒即可得到计算机自动绘出的工程图,使工作量最小化。编写程序时,根据不同的图层将程序模块化,每一模块又包含了四个视图,分别进行编译,然后整合。工程图的尺寸和构造由程序读取的结构参数决定,可以满足大部分中小型多效蒸馏装置的设计。生成的工程图支持用户对其继续操作,便于用户进行后续的查阅及修改。为了使用户更容易理解中小型LT-MED装置设计流程,本文以柴油发电机组废热驱动的MED系统为例,展示了从设计系统参数到生成换热管束排布图的整个过程。说明了设计时的注意事项和软件应用范围。
[Abstract]:Today, population growth, industrial development, and increased pollution have led to a growing shortage of fresh water resources. Seawater desalination has attracted much attention as a means of producing fresh water. Low temperature multieffect distillation (LT-MED) has become one of the main methods of seawater desalination because of its low operating temperature, flexible unit combination, easy scaling and can be driven by low grade heat source. The research object of this paper is a small and medium sized LT-MED system driven by hot water. The working principle and design method of this kind of system are analyzed and summarized. The calculation method of the physical parameters of water and steam and the formula of rising boiling point of seawater are put forward. Based on the law of conservation of energy and mass, considering the influence of the loss of flow resistance and the physical properties of seawater, the numerical models of each heat exchanger are established, including evaporator, condenser, preheater and flash tank. The calculation method of each parameter of the system is designed and the calculation block diagram is given. The program of layout diagram of heat exchanger bundles of medium and small LT-MED plant was compiled by AutoLISP language, and the secondary development of AutoCAD was completed. With the help of the LT-MED visual application software, the structure parameters can be obtained. The user can get the engineering drawing automatically drawn by the computer for a few seconds by inputting the related structural parameters, so that the workload is minimized. When the program is written, the program is modularized according to different layers. Each module contains four views, which are compiled and then integrated. The size and construction of the drawings are determined by the structural parameters read by the program, which can satisfy the design of most small and medium-sized multi-effect distillation units. The generated drawings support the user to continue to operate, facilitate the user to follow up and modify. In order to make it easier for users to understand the design process of small and medium sized LT-MED devices, this paper takes the MED system driven by waste heat of diesel generating units as an example, and shows the whole process from the design system parameters to the generation of arrangement diagram of heat transfer tube bundles. The points for attention and the application scope of the software are explained.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P747-39
本文编号：2164021
[Abstract]:Today, population growth, industrial development, and increased pollution have led to a growing shortage of fresh water resources. Seawater desalination has attracted much attention as a means of producing fresh water. Low temperature multieffect distillation (LT-MED) has become one of the main methods of seawater desalination because of its low operating temperature, flexible unit combination, easy scaling and can be driven by low grade heat source. The research object of this paper is a small and medium sized LT-MED system driven by hot water. The working principle and design method of this kind of system are analyzed and summarized. The calculation method of the physical parameters of water and steam and the formula of rising boiling point of seawater are put forward. Based on the law of conservation of energy and mass, considering the influence of the loss of flow resistance and the physical properties of seawater, the numerical models of each heat exchanger are established, including evaporator, condenser, preheater and flash tank. The calculation method of each parameter of the system is designed and the calculation block diagram is given. The program of layout diagram of heat exchanger bundles of medium and small LT-MED plant was compiled by AutoLISP language, and the secondary development of AutoCAD was completed. With the help of the LT-MED visual application software, the structure parameters can be obtained. The user can get the engineering drawing automatically drawn by the computer for a few seconds by inputting the related structural parameters, so that the workload is minimized. When the program is written, the program is modularized according to different layers. Each module contains four views, which are compiled and then integrated. The size and construction of the drawings are determined by the structural parameters read by the program, which can satisfy the design of most small and medium-sized multi-effect distillation units. The generated drawings support the user to continue to operate, facilitate the user to follow up and modify. In order to make it easier for users to understand the design process of small and medium sized LT-MED devices, this paper takes the MED system driven by waste heat of diesel generating units as an example, and shows the whole process from the design system parameters to the generation of arrangement diagram of heat transfer tube bundles. The points for attention and the application scope of the software are explained.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P747-39
【参考文献】
相关期刊论文 前2条
1 郑领英;;我国反渗透和超过滤技术的发展和应用概况[J];水处理技术;1985年05期
2 林斯清,张维润;海水淡化的现状与未来[J];水处理技术;2000年01期
相关硕士学位论文 前1条
1 时岩;低温多效海水淡化过程模拟[D];天津大学;2009年
，本文编号：2164021
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