转炉干法除尘控制系统设计与实现

发布时间：2018-05-21 08:28

本文选题：转炉 + 干法除尘　；参考：《华北理工大学》2017年硕士论文

【摘要】：进入21世纪以来钢铁冶金行业得到了飞速的发展。干法除尘技术在转炉烟气净化回收中应用已经十分广泛。干法除尘自动化控制系统的运行的好坏直接影响转炉冶炼和煤气回收进程。因此研究一套安全可靠的干法除尘控制系统至关重要。运用PLC控制技术设计了蒸发冷却器温度流量控制模块并对参数进行了优化,保证了电场烟气进口温度控制在合理的范围内,有效提高了除尘效率和延长除尘设备的使用寿命;设计了干法除尘电场控制模块,优化了电场控制模式,实现了由单一模式控制变为随转炉冶炼阶段自动改变的多模式控制,并增加了操作界面,在手动方式下,操作工可以自由切换高压(额定)模式,在自动模式下,各电场的电压控制按照既定的程序自动切换;实现了ID风机配合各吹炼阶段的高、低压模式的优化控制。对输灰系统、液压站的控制进行了改进。应用西门子PLC完成了转炉干法除尘控制系统的设计与实现。通过对国丰钢铁120吨转炉干法除尘控制系统工艺和使用中遇到的问题进行研究,寻找解决方案,完成了设备和控制系统的升级改造。改造后的干法除尘系统泄爆率明显降低、电场入口温度控制更加准确、电场耗能降低、避免了输灰系统发生板结现象。
[Abstract]:Since entering the 21 st century, the iron and steel metallurgical industry has been developing rapidly. Dry dust removal technology has been widely used in converter flue gas purification and recovery. The operation of the automatic control system of dry dust removal directly affects the process of converter smelting and gas recovery. Therefore, it is very important to study a safe and reliable dry dust removal control system. The temperature and flow control module of evaporative cooler is designed by using PLC control technology, and the parameters are optimized to ensure that the inlet temperature of electric field flue gas is controlled within a reasonable range, thus effectively improving the dust removal efficiency and prolonging the service life of dust removal equipment. The electric field control module of dry process dust removal is designed, the electric field control mode is optimized, the multi-mode control is realized from single mode control to automatic change with converter smelting stage, and the operation interface is added, in the manual mode, The operator can freely switch high voltage (rated) mode. In automatic mode, the voltage control of each electric field is automatically switched according to the established procedure, and the optimal control of the high and low pressure modes of the ID fan is realized with each blowing stage. The control of hydraulic station is improved for ash conveying system. The design and implementation of converter dry dust removal control system with Siemens PLC are completed. By studying the process and problems encountered in the dry dust removal system of Guofeng Iron and Steel Co., Ltd, 120 tons converter, the solution was found, and the upgrading of equipment and control system was completed. After the retrofit, the explosion rate of dry dust removal system is obviously reduced, the temperature control of electric field inlet is more accurate, the electric field energy consumption is reduced, and the phenomenon of ash conveying system is avoided.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TF345;TP273

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