钒钛冶炼炉使用压力控制初版.doc

摘 要 关键词：ABSTRACT Today, in Chinas booming industrial automation more and more get the attention of people, for the realization of the pangang group, more effective use of resources, nowadays industry to develop towards automation, a variety of control methods in the direction of development. The main purpose of boiler control is to regulate boiler, steam pressure, flow rate and temperature at the outlet to the numerical value of hope. Compared with abroad, our country is in rapid development stage, small PLC has batch production; Medium-sized PLC existing products; Large PLC has started to develop, and development abroad is entering a new generation, product updates faster, and because the programmable controller has the characteristics of high reliability and ease of application, widely used in food, chemical, metals, mining, papermaking, automobile and other industries, growing at a rapid rate, and it will be widely used in the new industry. Programmable controller from the point of view of technology, computer technology in the application of new research results will be more on the programmable controllers design and manufacturing, there will be a faster computing speed, storage capacity, larger, more intelligent species. In developing trend as a whole, large-scale programmable controller towards high speed, multi-function, networked, adapting to the DCS meet type control system development direction; Small programmable controller to miniaturization, enhancements, lower prices, modular black box direction. The characteristics on the trend of development view has the following several aspects: Key words w heating furnace hearth, PLC, pressure control, configuration  目 录 摘 要 I ABSTRACT…………………………………………………………………………………… Ⅱ 1 绪论 1 1.1 加热炉概述 1 1.2 加热炉自动控制现状及发展趋势 1 2 加热炉控制系统总体方案设计 4 2.1 加热炉生产工艺流程 4 2.2 加热炉控制系统总体方案 4 2.2.1 炉温控制系统 4 2.2.2 煤气和空气流量控制系统 5 2.2.3 炉膛压力控制系统 5 2.2.4 煤气总管、空气总管压力控制系统 6 3 加热炉压力控制系统的设计 7 3.1 加热炉压力对生产的影响 7 3.2 加热炉控制系