生物质锅炉混煤掺烧对锅炉经济性及稳定性的影响

Affect on Boiler Economy and Stability by Blended Coal Combustion of Biomass Boiler

基于生物质直燃发电技术,以煤作为主要添加剂进行现场工业环境试验,研究生物质直燃锅炉掺烧不同品种、不同比例煤后对锅炉经济性及稳定性的影响,以确定掺烧煤的品种和合理比例。研究结果表明:相对于纯燃生物质,掺烧煤可以提高锅炉热效率,降低锅炉热损失。试验表明,在20%热值烟煤掺烧比例下锅炉热效率比纯燃生物质提高2.34%。在掺烧煤后,锅炉带负荷能力、燃烧状况都随掺煤比例的提高而提高,进而可以进一步稳定燃烧,提高生物质的利用效率。

Based on biomass direct combustion power generation technology,field industrial environment experiment was conducted by taking coal as main additive for studying affect on boiler economy and stability by burning different varieties and variable proportion coals of biomass direct combustion boiler,so as to determine varieties of blending combustion coal and reasonable proportion.Research results indicate that relative to direct combustion biomass,it is able to improve boiler heating efficiency and reduce heat loss by burning blending coal.Experiment indicates that with blending combustion proportion of 20% calorific value coal,boiler heating efficiency improves 2.34% over than that of direct combustion biomass.After burning blending coal,boiler on-load capability and combustion condition improves with increase of proportion of blending coal,and then it is able to keep stable combustion and improve utilization efficiency of biomass.