喷煤系统中离心式压缩机的控制系统设计与实现
发布时间:2018-05-13 22:09
本文选题:离心式压缩机 + 喘振 ; 参考:《东北大学》2012年硕士论文
【摘要】:在冶金企业中,离心式压缩机是非常重要的动力输送设备,为了确保其能够稳定、安全、高效的工作,设计并实现离心式压缩机的计算机控制是十分重要的。本文结合离心式压缩机的特点就控制系统的结构和控制方法进行了深入分析和研究,从信号采集、信号分析、PID控制运算、输出控制、安全保护等整个压缩机控制系统回路的各个组成环节出发,进行了分析研究和改进升级。在提高控制系统的控制精度的基础上,进一步提高了离心式压缩机运行的可靠性、安全性、稳定性,为高炉喷煤比提高后的稳定生产,提供了安全可靠的保障。 离心式压缩机的控制是以逻辑控制、联锁控制、防喘振控制为主。从这个方面考虑,具备较强逻辑控制功能的PLC系统是一个理想的选择。从性能上来看,PLC产品已经具备了很强的模拟量处理能力和稳定性,能够满足本控制系统对模拟信号处理和稳定性的要求;从系统结构来看,PLC系统兼容工业以太网协议,从而为系统间的通讯和扩展提供了更多的空间。因此,选择PLC系统作为控制系统的主体兼顾了设备投资和控制效果。 本文具体研究内容是离心式压缩机控制系统硬件架构的设计和改造、控制模型的应用及机组现场数据在线监控和操作。本文主要进行了PLC控制系统硬件结构设计、控制系统控制模型设计、压缩机防喘振控制系统的研究设计。 结合论文研究工作所研制的离心式压缩机控制系统已经在某钢铁集团公司投入实际运行,控制系统性能稳定,控制效果良好。
[Abstract]:In metallurgical enterprises, centrifugal compressor is a very important power conveying equipment, in order to ensure its stability, safety and efficient work, it is very important to design and realize the computer control of centrifugal compressor. According to the characteristics of centrifugal compressor, the structure and control method of the control system are deeply analyzed and studied in this paper. The signal collection, signal analysis, pid control operation and output control are carried out. Safety protection and other components of the compressor control system are analyzed and upgraded. On the basis of improving the control precision of the control system, the reliability, safety and stability of the centrifugal compressor are further improved, which provides a safe and reliable guarantee for the stable production of the blast furnace after the coal injection ratio is increased. Centrifugal compressor control is mainly logic control, interlock control, anti-surge control. From this point of view, the PLC system with strong logic control function is an ideal choice. In terms of performance, PLC products already have strong analog processing capacity and stability, which can meet the requirements of analog signal processing and stability in this control system, and the PLC system is compatible with industrial Ethernet protocol from the point of view of system structure. This provides more space for communication and extension between systems. Therefore, the PLC system is chosen as the main part of the control system, and the equipment investment and control effect are taken into account. This paper focuses on the design and reconstruction of the hardware architecture of the centrifugal compressor control system, the application of the control model, and the on-line monitoring and operation of the unit field data. In this paper, PLC control system hardware structure design, control system control model design, compressor anti-surge control system research and design. The centrifugal compressor control system developed in this paper has been put into practice in a certain iron and steel group company. The control system has stable performance and good control effect.
【学位授予单位】:东北大学
【学位级别】:硕士
【学位授予年份】:2012
【分类号】:TH452;TP273
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