采用改质煤焦油作为煤粉锅炉的点火燃料  

Modification of Coal Tar as Fuel for Ignition of Pulverized Coal-Fired Boiler

作　　者：邓胜祥[1] 李继中[1] 周孑民[1] 李昕卉[1] 

机构地区：[1]中南大学能源科学与工程学院,长沙410083

出　　处：《燃烧科学与技术》2009年第4期304-308,共5页Journal of Combustion Science and Technology

基　　金：湖南省科技计划资助项目(2007CK3077)

摘　　要：煤粉锅炉常用昂贵的重柴油作点火燃料.为降低锅炉起动成本,在煤焦油中加入已用过的润滑油、齿轮油等废油,再添加1‰(质量分数)的添加剂1,制得调和煤焦油;在调和煤焦油中添加3‰(质量分数)的添加剂2和12%有污染的"红水"(主要成份为二甲苯、苯酚、焦油等),制成改质煤焦油;以改质煤焦油取代重柴油作为煤粉锅炉的点火燃料.采用改质煤焦油和重柴油点火两种工况的锅炉效率分别为79.70%和81.39%,相距甚小,而锅炉的起动成本明显降低.Heavy diesel is often used as fuel for ignition of the pulverized coal-fired boiler, but at a high cost. In order to reduce fuel cost for boiler starting, heavy diesel is replaced by modified coal tar, which is made through two steps. Firstly, waste oil, such as used-gear oil, and 1‰ No. 1 additive are added to coal tar to get regulated coal tar, and then 3‰ No. 2 additive and 12% contaminated red water are added to obtain desired modified coal tar. The experimental results show that the thermal efficiency of the boiler using modified coal tar is 79.70% and that using heavy diesel is 81.39% , and the difference is quite small. However the fuel cost for boiler starting is significantly reduced.

关 键 词：煤粉锅炉 点火 煤焦油 添加剂 重柴油 

分 类 号：TK16[动力工程及工程热物理—热能工程]