SBR污水处理工艺自动控制系统的设计

发布时间：2018-12-16 10:42

【摘要】：随着经济的不断发展,水资源已经成为制约我国经济社会可持续发展的重要因素,造成我国严峻水环境形势的原因主要包括三个方面：水资源短缺、水污染严重、浪费惊人。在生活质量越来越被重视的今天,城市水污染治理是一个刻不容缓的问题。根据经济发展的需要,全国各地相继建成各种各样的污水处理厂,但在实际运行中,其自动化程度并不高,而且运行效果不佳。Sequencing Batch Reactor (SBR)为序列间歇式活性污泥法,又称作序批式活性污泥法,是一种污废水生物处理技术。它是按时序来以间歇曝气方式运行,改变活性污泥生长环境的,被全球广泛认同和采用的污水处理技术。由于SBR污水处理工艺独具的时序特性,使得它能够采用自动控制技术来提高其运行效率。目前国内的SBR污水处理工艺计算机自动控制技术大部分都是仅对工艺过程进行的流程自动控制,不能够很好的确保出水水质。本文根据SBR污水处理工艺过程的发展及国内外污水处理过程自动控制现状的分析研究,在对SBR污水处理工艺流程进行全自动控制的基础上,利用西门子组态软件Wincc建立组态界面,使得监控PC机能够更加清楚的展现出现场状况,并利用PROFIBUS进行通讯实现PLC现场控制设备与控制室PC机之间的信息传输,最终达到控制室对现场设备的全自动控制及现场开关对设备的手动控制,对现场的实时数据和历史数据进行监控与记录,组态界面能够清晰明了的显示出现场情况,不仅使得对整个系统的控制更加灵活,而且可以确保系统工作的可靠性与准确性。
[Abstract]:With the continuous development of economy, water resources have become an important factor restricting the sustainable development of our country's economy and society. The reasons for the severe water environment situation in China mainly include three aspects: water shortage, serious water pollution and astonishing waste. Nowadays, more and more attention has been paid to the quality of life, urban water pollution control is an urgent problem. According to the need of economic development, all kinds of sewage treatment plants have been built all over the country, but in actual operation, the degree of automation is not high, and the operation effect is not good. Sequencing Batch Reactor (SBR) is sequential batch activated sludge process. It is also called sequencing batch activated sludge process, which is a kind of wastewater biological treatment technology. It operates in intermittent aeration mode according to time series and changes the growth environment of activated sludge. It is widely recognized and adopted in the world. Because of the unique timing characteristics of SBR sewage treatment process, it can use automatic control technology to improve its operation efficiency. At present, the computer automatic control technology of SBR wastewater treatment process is mostly automatic control of the process, which can not ensure the quality of effluent. According to the development of SBR wastewater treatment process and the analysis and research of domestic and foreign wastewater treatment process automatic control status, this paper carries out automatic control of SBR sewage treatment process. The configuration interface is set up by using Siemens configuration software Wincc, which makes the monitoring PC machine more clearly show the field situation, and realizes the information transmission between the PLC field control equipment and the control room PC machine by using PROFIBUS communication. Finally, the automatic control of the field equipment in the control room and the manual control of the equipment on the spot switch are achieved. The real-time data and historical data of the field are monitored and recorded. The configuration interface can clearly show the situation of the field. It not only makes the control of the whole system more flexible, but also ensures the reliability and accuracy of the system.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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