热力发电Issue(10)：9-14,6.DOI:10.3969/j.issn.1002-3364.2015.10.009
660 MW机组锅炉掺烧褐煤对煤粉输送和运行成本的影响
Influence of blending lignite with bituminous coal on coal feeding safety and operational costs for a 660 MW unit boiler
摘要
Abstract
Experimental investigations on indirect blending lignite with bituminous coal were carried out on an ultra supercritical 660 MW unit.On the basis of pulverizing system test and lignite co-combustion test, the operation safety and economy of the system after co-firing lignite was evaluated.The results show that, after the medium speed roller mill was retrofitted from grinding single lignite to single lignite coal,to en-sure the same lignite particle production,the particle size will increase a little.In term of raw lignite with moisture mass ratio of 30%,the heating process in mill can guarantee the stability and safety of coal feed-ing in the primary air pipeline,in which no additional heating device was required.After the resistance in-side the coal mill increased,the primary air inlet pressure and its outlet temperature (5 5 ℃ to 6 5 ℃)in mill are two factors to ensure the operation safety.Blending lignite affects little on the boiler thermal efficiency. When the price difference between lignite and bituminous coal reaches about 50 yuan,the operation cost in the power plant will be reduced effectively.关键词
锅炉/烟煤/褐煤/掺烧/热效率/安全性/经济性Key words
boiler/bituminous/lignite/blending combustion/thermal efficiency/safety/economy分类
能源科技引用本文复制引用
王群英,苏攀,张健,郝功涛,邓庆德,张琨..660 MW机组锅炉掺烧褐煤对煤粉输送和运行成本的影响[J].热力发电,2015,(10):9-14,6.基金项目
杭州市工业与科技重大创新项目(20132011A05) （20132011A05）
2013－2014年度中国华电集团公司科技项目(CHDKJ13-01-35) （CHDKJ13-01-35）
