卷烟厂污水处理自动控制系统设计与研究
发布时间：2019-03-05 12:51
【摘要】：如今,随着烟草工业企业生产自动化水平的不断进步、烟草制品产量的不断上升和企业规模的不断扩大,使烟草企业污水处理的负荷不断增加,污水处理高能耗的问题日显突出。为实现烟草工业企业节能减排任务的总目标,优化和调整污水处理自动控制系统及工艺流程,是烟草企业不得不面对的问题。本文以卷烟厂工业废水BAF处理回用控制系统为研究对象,首先介绍了BAF型污水处理及回用水工艺流程原理,即采用先进的生化工艺技术,以水解酸化池和曝气滤池为主体,进行烟草工业废水处理;对污水处理重点工艺流程中的相关设备的能耗进行了分析,查找节能降耗机会;根据能耗分析,着重对曝气风机、凝絮剂添加系统进行控制系统优化改造,有针对性的提出了相应的节能优化控制方法与策略。并详细描述了相应的先进控制方法的理论依据。通过现场试验和调试,对卷烟废水处理的节能降耗和设备的优化运行起到良好效果。根据卷烟厂污水处理相关工艺和设备的要求,对控制系统的硬件进行选型设计,采用西门子公司S7-300系列PLC作为控制单元,分别介绍了PLC各功能模块的特点及接线方式,采用S7-300系列通信模块建立基于Profinet网络的总线连接。为防止控制系统受到干扰,分析了控制系统的保护接地和现场网络屏蔽接地方法。控制系统通过工业以太网以光纤为介质,将污水处理控制系统与能源管控系统相连接;控制系统通过现场总线技术,实现了现场设备层和运算控制层之间的数据连接和通讯,完成污水处理系统的自动控制和远程监控。本文中控制系统的编程基于西门子公司的Step7软件,Step7软件功能强大,为编程人员提供了方便的工具和界面,可以方便的实现多人分工合作,并具有对PLC进行硬件组态、网络参数配置、故障诊断、离线编写控制程序及在线监控等功能,同时可以配置网络组态和连接,对硬件进行上传和下载以及通过模拟器进行离线仿真。采用Wonderware的公司的Intouch软件作为中控室上位机监控组态软件,利用Intouch软件丰富的插件和绘图工具,实现了污水控制系统的集成和图像化显示,并利用报警工具,对各个环节参数进行监控。采用数据报表实现控制系统各个参数及实时曲线查询,为各工艺流程的优化和状态监控提供数据支持,方便进行数据追溯。采用污水水质实时监控技术,在线分析水质。本卷烟废水自动化监控与控制系统与传统的控制方法相比较,自动化程度较高,并与厂区能源管控系统实现无缝连接,起到了节能降耗的效果,有一定的应用价值。
[Abstract]:Today, with the continuous progress of the production automation level of tobacco industry enterprises, the increasing production of tobacco products and the continuous expansion of the scale of enterprises, the burden of sewage treatment in tobacco enterprises has been increasing. The problem of high energy consumption in sewage treatment is becoming more and more prominent. In order to realize the overall goal of energy saving and emission reduction in tobacco enterprises, it is a problem that tobacco enterprises have to face to optimize and adjust the automatic control system and technological process of wastewater treatment. This paper takes the control system of BAF treatment and reuse of industrial wastewater of cigarette factory as the research object. Firstly, it introduces the principle of the process flow of wastewater treatment and reuse of BAF type, that is, adopting advanced biochemical technology, taking hydrolytic acidification tank and aerated filter as the main body. Treatment of waste water from tobacco industry; The energy consumption of the related equipments in the key process of sewage treatment is analyzed to find out the opportunities of saving energy and reducing consumption. According to the analysis of energy consumption, the optimization of control system for aeration fan and flocculant addition system is emphatically carried out, and the corresponding energy-saving optimization control methods and strategies are put forward. The theoretical basis of the corresponding advanced control method is described in detail. Through field test and debugging, it has a good effect on saving energy and reducing consumption of cigarette wastewater treatment and optimizing operation of equipment. According to the requirements of the sewage treatment process and equipment in cigarette factory, the hardware of the control system is selected and designed. The S7x300 series PLC of Siemens Company is used as the control unit, and the characteristics and connection modes of each function module of PLC are introduced respectively. The bus connection based on Profinet network is established by using S _ 7 ~ (7) ~ (300) series communication module. In order to prevent the disturbance of the control system, the protection grounding method of the control system and the shielding grounding method of the field network are analyzed. The control system connects the sewage treatment control system with the energy control system through the industrial Ethernet with optical fiber as the medium. Through the field bus technology, the control system realizes the data connection and communication between the field equipment layer and the operation control layer, and completes the automatic control and remote monitoring of the sewage treatment system. The programming of the control system in this paper is based on the Step7 software of Siemens Company. The Step7 software has a powerful function, which provides a convenient tool and interface for the programmers, and can conveniently realize the multi-person division and cooperation, and has hardware configuration to the PLC. Network parameters configuration, fault diagnosis, off-line programming control program and on-line monitoring and other functions can be configured, network configuration and connection can be configured, hardware upload and download, and off-line simulation through the simulator. The Intouch software of Wonderware company is used as the monitoring and configuration software of the upper computer in the central control room, and the rich plug-in and drawing tool of Intouch software are used to realize the integration and image display of the sewage control system, and the alarm tool is used. Monitor the parameters of each link. The data report forms are used to query the parameters and real-time curves of the control system so as to provide data support for the optimization of each technological process and condition monitoring and facilitate the tracing of the data. The real-time monitoring technology of sewage quality is used to analyze the water quality on-line. Compared with the traditional control method, the automatic monitoring and control system of cigarette wastewater has a higher degree of automation, and is connected seamlessly with the energy control system in the factory area. It has the effect of saving energy and reducing consumption, and has certain application value.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X795;TP273
本文编号：2434924
[Abstract]:Today, with the continuous progress of the production automation level of tobacco industry enterprises, the increasing production of tobacco products and the continuous expansion of the scale of enterprises, the burden of sewage treatment in tobacco enterprises has been increasing. The problem of high energy consumption in sewage treatment is becoming more and more prominent. In order to realize the overall goal of energy saving and emission reduction in tobacco enterprises, it is a problem that tobacco enterprises have to face to optimize and adjust the automatic control system and technological process of wastewater treatment. This paper takes the control system of BAF treatment and reuse of industrial wastewater of cigarette factory as the research object. Firstly, it introduces the principle of the process flow of wastewater treatment and reuse of BAF type, that is, adopting advanced biochemical technology, taking hydrolytic acidification tank and aerated filter as the main body. Treatment of waste water from tobacco industry; The energy consumption of the related equipments in the key process of sewage treatment is analyzed to find out the opportunities of saving energy and reducing consumption. According to the analysis of energy consumption, the optimization of control system for aeration fan and flocculant addition system is emphatically carried out, and the corresponding energy-saving optimization control methods and strategies are put forward. The theoretical basis of the corresponding advanced control method is described in detail. Through field test and debugging, it has a good effect on saving energy and reducing consumption of cigarette wastewater treatment and optimizing operation of equipment. According to the requirements of the sewage treatment process and equipment in cigarette factory, the hardware of the control system is selected and designed. The S7x300 series PLC of Siemens Company is used as the control unit, and the characteristics and connection modes of each function module of PLC are introduced respectively. The bus connection based on Profinet network is established by using S _ 7 ~ (7) ~ (300) series communication module. In order to prevent the disturbance of the control system, the protection grounding method of the control system and the shielding grounding method of the field network are analyzed. The control system connects the sewage treatment control system with the energy control system through the industrial Ethernet with optical fiber as the medium. Through the field bus technology, the control system realizes the data connection and communication between the field equipment layer and the operation control layer, and completes the automatic control and remote monitoring of the sewage treatment system. The programming of the control system in this paper is based on the Step7 software of Siemens Company. The Step7 software has a powerful function, which provides a convenient tool and interface for the programmers, and can conveniently realize the multi-person division and cooperation, and has hardware configuration to the PLC. Network parameters configuration, fault diagnosis, off-line programming control program and on-line monitoring and other functions can be configured, network configuration and connection can be configured, hardware upload and download, and off-line simulation through the simulator. The Intouch software of Wonderware company is used as the monitoring and configuration software of the upper computer in the central control room, and the rich plug-in and drawing tool of Intouch software are used to realize the integration and image display of the sewage control system, and the alarm tool is used. Monitor the parameters of each link. The data report forms are used to query the parameters and real-time curves of the control system so as to provide data support for the optimization of each technological process and condition monitoring and facilitate the tracing of the data. The real-time monitoring technology of sewage quality is used to analyze the water quality on-line. Compared with the traditional control method, the automatic monitoring and control system of cigarette wastewater has a higher degree of automation, and is connected seamlessly with the energy control system in the factory area. It has the effect of saving energy and reducing consumption, and has certain application value.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X795;TP273
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