天然气与煤粉混烧技术在工业锅炉上的应用

介绍了在链条炉的基础上,以煤粉、天然气的悬浮燃烧方式配合火床燃烧的节能改造技术,对一台20t/h快装链条炉改造后,锅炉启动时升温速度提高,负荷调节的响应时间缩短,锅炉灰渣含碳量由原来的20％降低到5％以下,机械不完全燃烧损失大为降低.过量空气系数由改造前的2.5 ～3降低至1.2 ～1.3,大幅减少了锅炉排烟量,降低了锅炉排烟热损失.锅炉热效率由改造前的62％提高至改造后的77％ ～ 80％.

Application of natural gas and coal co-combustion technology in industrial boiler

On the basis of chain boiler,energy saving retrofit technology was introduced by using coal and natural gas suspension combustion combined with fire bed combustion.After the modification of a 20 t/h quick chain boiler,heating rate during boiler startup was improved,and response time of load regulation was greatly lower.Carbon content in the ash residue from boilers reduced from 20% to below 5%,and loss of mechanical incomplete combustion dropped.Excess air ratio was reduced from 2.5～3 to 1.2～1.3,which decreased the amount and heat loss of boiler exhaust gas.Boiler thermal efficiency was increased from 62% to 77%～80%.