选矿厂监控系统设计与研究
发布时间：2018-10-14 12:19
【摘要】：目前,选矿工艺越来越复杂,选矿设备日益精进,且现场传感器及执行设备都朝着智能化、信息化、数字化方向发展,因此对选矿厂的监控水平和管理水平要求越来越高。选矿厂选矿工艺过程是一个比较复杂的控制过程,各变量参数间耦合严重,非线性且惯性大,时滞性严重,因此采用传统的控制方式无法对其产生很好的控制效果。本文以某选矿厂作为背景,根据选矿厂生产现状,采用先进的智能控制算法以及高性能软硬件和监控组态软件对选矿厂的监控系统进行研究设计。本文首先分析了选矿厂破碎筛分及磨矿分级的工艺流程,给出了各控制量的控制方法。在此基础上,引入了模糊控制算法,并对球磨机给矿量及分级机溢流浓度两个控制量进行了模糊控制,给出了相应的语言赋值表,控制规则表及模糊控制查询表。将选矿厂自动化通信采用三级网络结构,分别为现场设备层、车间监控层和工厂管理层。整个自动化控制系统分为一个中心控制主站(PLC主站),2个远程数据I/O站。PLC主站负责整个厂区电气设备自动化运行的协调、数据和逻辑运算以及与上位机的通信,PLC远程I/O子站负责对设备运行状态和仪器仪表数据的采集及控制。本文对各部分都进行了详细的硬件配置,并给出了其I/O信号采集点。本文控制系统的软件实现采用了STEP 7编程软件,给出了该控制系统PLC程序部分所需要的组织块和逻辑功能块,以及功能块与其各自对应的背景数据块。详细说明了选矿厂控制系统程序流程,包括主程序流程、球磨机给矿量控制程序流程、球磨机磨矿浓度控制流程和螺旋分级机溢流浓度控制流程等几个部分。对于控制系统实现的关键部分模糊控制的实现,本文还给出了相应的程序梯形图。在控制系统上位机监控组态软件设计方面,说明了Win CC连接到S7自动化系统的通信方式。在Win CC的图形编辑器中对厂房的过程画面进行了设计,并对其按钮以及I/O输入/输出域进行组态。对报警记录及消息归档进行组态,并以曲线形式显示在画面中。最后,对登陆画面设置相应的脚本函数,实现用户管理及授权。采用变量模拟器仿真运行结果显示,该监控系统基本实现了原本预定的控制要求。
[Abstract]:At present, the mineral processing technology is more and more complex, the processing equipment is becoming more and more sophisticated, and the field sensors and execution equipment are developing towards the direction of intelligence, information and digitization, so the monitoring level and management level of the concentrator are required to be higher and higher. The process of dressing process in concentrator is a complex control process. The parameters of each variable are coupled seriously, nonlinear and inertia is large, and the time delay is serious. Therefore, the traditional control method can not produce a good control effect on it. In this paper, based on the present production situation of a concentrator, advanced intelligent control algorithm, high performance hardware and software and monitoring configuration software are used to study and design the monitoring system of the concentrator. In this paper, the process flow of crushing, screening and grinding classification in concentrator is analyzed, and the control method of each control quantity is given. On the basis of this, the fuzzy control algorithm is introduced, and the fuzzy control of the feed quantity of ball mill and the overflow concentration of classifier is carried out. The corresponding language assignment table, control rule table and fuzzy control query table are given. The three-level network structure is adopted for the automatic communication of the concentrator, namely, the field equipment layer, the workshop monitoring layer and the factory management layer. The whole automation control system is divided into a central control master station (PLC master station), two remote data I / O stations. The PLC master station is responsible for the coordination of the automation operation of electrical equipment in the whole plant. The PLC remote I / O substation is responsible for collecting and controlling the running state of the equipment and the instrument data. In this paper, the hardware of each part is configured in detail, and the sampling point of I / O signal is given. In this paper, the STEP 7 programming software is used in the software implementation of the control system. The organization block and logical function block needed in the PLC program part of the control system and the corresponding background data blocks of the function block are given. The program flow of the control system of the concentrator is described in detail, including the main program flow, the control program flow of the feed ore quantity of the ball mill, the control flow of the grinding concentration of the ball mill and the overflow concentration control flow of the spiral classifier, etc. For the realization of the key part of the control system fuzzy control, the corresponding program ladder diagram is also given in this paper. The communication mode between Win CC and S7 automation system is explained in the design of supervisory configuration software of upper computer in control system. The process picture of the workshop is designed in the graphic editor of Win CC, and the buttons and I / O input / output fields are configured. The alarm record and message archiving are configured and displayed in the form of curves. Finally, the login screen set the corresponding script function to achieve user management and authorization. The simulation results of variable simulator show that the control system basically realizes the original control requirements.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD928;TD67
本文编号：2270432
[Abstract]:At present, the mineral processing technology is more and more complex, the processing equipment is becoming more and more sophisticated, and the field sensors and execution equipment are developing towards the direction of intelligence, information and digitization, so the monitoring level and management level of the concentrator are required to be higher and higher. The process of dressing process in concentrator is a complex control process. The parameters of each variable are coupled seriously, nonlinear and inertia is large, and the time delay is serious. Therefore, the traditional control method can not produce a good control effect on it. In this paper, based on the present production situation of a concentrator, advanced intelligent control algorithm, high performance hardware and software and monitoring configuration software are used to study and design the monitoring system of the concentrator. In this paper, the process flow of crushing, screening and grinding classification in concentrator is analyzed, and the control method of each control quantity is given. On the basis of this, the fuzzy control algorithm is introduced, and the fuzzy control of the feed quantity of ball mill and the overflow concentration of classifier is carried out. The corresponding language assignment table, control rule table and fuzzy control query table are given. The three-level network structure is adopted for the automatic communication of the concentrator, namely, the field equipment layer, the workshop monitoring layer and the factory management layer. The whole automation control system is divided into a central control master station (PLC master station), two remote data I / O stations. The PLC master station is responsible for the coordination of the automation operation of electrical equipment in the whole plant. The PLC remote I / O substation is responsible for collecting and controlling the running state of the equipment and the instrument data. In this paper, the hardware of each part is configured in detail, and the sampling point of I / O signal is given. In this paper, the STEP 7 programming software is used in the software implementation of the control system. The organization block and logical function block needed in the PLC program part of the control system and the corresponding background data blocks of the function block are given. The program flow of the control system of the concentrator is described in detail, including the main program flow, the control program flow of the feed ore quantity of the ball mill, the control flow of the grinding concentration of the ball mill and the overflow concentration control flow of the spiral classifier, etc. For the realization of the key part of the control system fuzzy control, the corresponding program ladder diagram is also given in this paper. The communication mode between Win CC and S7 automation system is explained in the design of supervisory configuration software of upper computer in control system. The process picture of the workshop is designed in the graphic editor of Win CC, and the buttons and I / O input / output fields are configured. The alarm record and message archiving are configured and displayed in the form of curves. Finally, the login screen set the corresponding script function to achieve user management and authorization. The simulation results of variable simulator show that the control system basically realizes the original control requirements.
【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD928;TD67
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