马钢热风炉残氧分析与优化燃烧技术

Residual Oxygen Analysis and Optimized Combustion Control Technology of Hot-blast Stove in Masteel

热风炉普遍存在着燃烧效率不高的问题,如何动态监测热风炉燃烧效率进而优化燃烧过程控制是解决问题的关键。在热风炉烟道阀前设置氧化锆残氧分析系统,实时检测烟道废气含氧量,结合拱顶温度和废气温度分析,获得当前热风炉燃烧效率状况。通过模糊控制和专家仲裁实时进行空燃比优化燃烧控制,以达到提高燃烧效率、降低能源消耗、减少污染排放、提高热风温度、延长热风炉使用寿命的目的。通过在马钢一号高炉的实施,取得了良好的经济效益和社会效益。

Low combustion efficiency is a widespread problem in hot-blast stove system, how to monitor dynamic combustion efficiency of the hot-blast stove, and then to optimize combustion process control is the key to solve the problem. For monitoring the oxygen concentration of the exhaust gas in real time, a zirconia residual oxygen analyzing system is fixed in front of the flue valve ; combining the analysis on temperature of the vault and exhaust gas, current status of combustion in hot-blast stove can be obtained. To enhance the combustion efficiency, reduce energy consumption, decrease pollution emission, increase the temperature of hot air, and extend the operation life of the stove, the real-time optimal air/fuel ratio control is realized via fuzzy control and expert arbitration. This method has been implemented in No. 1 blast furnace of Masteel with good socioeconomic benefits.