人工海水净化处理系统及工艺流程控制研究

发布时间：2018-02-20 19:52

本文关键词： 人工海水净化系统工艺流程控制可编程控制器人机界面　出处：《武汉工程大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文是为某科研所进行海洋环境基础研究配套而设计的人工海水净化处理系统。本文主要研究内容为人工海水净化处理系统的工艺流程设计,净化处理系统的方案论证设计。人工海水净化处理一般采用物理过滤和化学消毒的常规处理方法,而净化处理要求更高时要采用紫外线和臭氧消毒的方法。本文采用了物理过滤的常规方法与紫外线和臭氧消毒相结合,保障人工海水品质符合技术要求,并通过PLC和HMI技术手段来实现人工海水净化处理工艺流程的自动控制。本文按照设计技术要求,将工艺流程分解成4个相对独立的工况,分别是1)初次配置工况——制备一定容积和一定盐度的试验用人工海水;2)增加盐度工况——使用试验用水循环来溶化一定量的海盐,从而增加试验用水的盐度;3)循环净化工况——使用净化常规方法与紫外线消毒和臭氧消毒相结合,保证试验用水品质;4)减盐度或排污工况——将试验用水定量排入晒盐场,靠太阳曝晒蒸发后回收海盐,防止人工海水直接排放江湖而产生污染。本文提出了人工海水净化处理系统的方案并加以论证。首先,拟定了人工海水净化处理的主要工艺流程;其次,对絮凝、沉淀过程中的单元设施,投药泵和高效沉淀池的主要参数进行了计算;然后,对净化处理流程中的紫外线消毒与臭氧消毒装置的主要参数进行了计算和选型。本文编写了PLC控制程序和触摸屏人机界面交互程序,实现了工艺流程的自动化控制;还编写了故障监控与显示程序,以方便操作人员进行故障诊断与维护;另外,对系统的硬件以及软件编程的标准化和可靠化进行初步设计,以保障系统可靠运行。
[Abstract]:This paper is an artificial seawater purification system designed for the basic research of marine environment in a scientific research institute. The main content of this paper is the technological process design of the artificial seawater purification system. Design and demonstration of purification system. The conventional methods of physical filtration and chemical disinfection are generally used in artificial seawater purification. In order to ensure the quality of artificial seawater meets the technical requirements, the conventional physical filtration method is combined with ultraviolet and ozone disinfection to ensure the quality of artificial seawater. The automatic control of artificial seawater purification process is realized by means of PLC and HMI. According to the design technical requirements, the process is decomposed into four relatively independent working conditions. They are: 1) initial configuration conditions-artificial seawater 2 for preparing a certain volume and a certain salinity) increasing salinity working conditions-using water cycle to dissolve a certain amount of sea salt, So as to increase the salinity of the test water under the condition of circulating purification-using the conventional purification method combined with ultraviolet disinfection and ozone disinfection to ensure the quality of the water for the test to reduce salinity or discharge the test water into the salt field, the test water can be quantitatively discharged into the salt field. Recovering sea salt after evaporation by sun exposure to prevent the artificial seawater from discharging directly into rivers and lakes. This paper puts forward the scheme of artificial seawater purification treatment system and proves it. Firstly, the main technological process of artificial seawater purification treatment is worked out. Secondly, the main parameters of unit facilities, dosing pump and high efficiency sedimentation tank during flocculation and sedimentation are calculated. The main parameters of the ultraviolet disinfection and ozone disinfection device in the purification treatment process were calculated and selected. The PLC control program and the interactive program of the man-machine interface of the touch screen were compiled in this paper, which realized the automatic control of the process flow. A fault monitoring and displaying program is also written to facilitate the operator in fault diagnosis and maintenance. In addition, the standardization and reliability of the hardware and software programming of the system are preliminarily designed to ensure the reliable operation of the system.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P742;TP23

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