我厂主要生产黄酒酒精以及饮料,年耗煤近万吨,主要的供汽设备是一台S_2L_(10)-25/40型锅炉。过去该炉炉渣中的固定碳一直较高,对煤的挥发物含量十分敏感,低于20%就着火不好。今年大修对该炉的前拱进行了改造,结果使其可燃烧挥发分较低(16%左右)的煤,并且炉渣中固定碳始终保持在110%左右。一、对原炉膛尺寸的分析S_2L_(10)-25/40型锅炉是杭州锅炉厂1979年的产品,设计时要求用挥发分23%、热值18841千焦/公斤的煤。过去在煤种比较符合要求的情况下,煤渣固定碳含量一直超过20%, I plant mainly produces rice wine alcohol and beverages, coal consumption of nearly 10,000 tons, the main gas supply equipment is a S_2L_ (10) -25 / 40-type boiler. In the past the fixed carbon in the furnace slag has been high, very sensitive to the volatile content of coal, less than 20% on the fire is not good. This year’s overhaul has been rebuilt to the front arch of the furnace, with the result that it can burn coal with a lower volatile content (around 16%) and the fixed carbon in the slag remains around 110%. First, the size of the original furnace S_2L_ (10) -25/40-type boiler is a product of Hangzhou Boiler Works in 1979, the design requirements of volatile 23%, 18841 kJ / kg of coal heat. In the past in the coal more in line with the requirements of the case, the fixed carbon content of cinder has been more than 20%