钢铁企业燃气互换性研究

以钢铁企业普遍应用的加热炉为研究对象,从热平衡方程入手分析燃气在不同燃烧条件下的燃料利用系数.通过燃气互换性计算,从火焰稳定性、热负荷强度和合理置换等方面研究了适合于工业类加热炉及锅炉动力类设备的燃气互换性问题,具体研究了不同热值高、焦混合煤气置换纯焦炉煤气的可行性,得出在满足生产工艺要求下不同燃气的置换.研究表明:当空气消耗系数n=1.05,燃气混合体积比α≥0.3时,混合煤气的热值大于7 860 kJ/m3,用来置换焦炉煤气,可满足生产工艺要求,节约煤气资源,减少环境污染.

Research on Interchangeability of Fuel Gases in Iron & Steel Works

Based on the heating furnace in an iron and steel works, the gas utilization efficiency was analyzed under conditions of different types of combustion through the heat balance of the furnace. The flame stability, intensity of thermal load and reasonable replacement of improper fuel gas were taken into account to investigate the fuel gas interchangeability of industrial heating furnaces and boilers. And the feasibility of the interchangeability between the gases mixing coke oven gas with blast furnace gas of different thermal values and pure coke oven gas was investigated. A conclusion was drawn that the mixed gas was available to replace coke oven gas to meet the requirements for production process, energy saving and alleviating environment pollution if the air consumption coefficient n=1.05, the ratio of coke oven gas to mixed gas α ≥ 0.3 and the thermal value of mixed gas > 7860 kJ/m³.