五彩湾煤燃烧特性的试验研究

Experimental Study on Combustion Characteristics of Wucaiwan Coal

对五彩湾煤与乌东煤2种煤种及3种不同掺烧比例的混煤分别进行了物理化学特性分析、煤粉气流着火温度测试、一维火焰炉中燃烧与结渣试验以及200kW沾污试验台的沾污性能试验,并对各种混煤的着火、燃尽和结渣性能进行了评定.利用专家系统对试验煤样的主要特性进行了最终评价,并结合2种沾污性能判别指标对煤灰的沾污性能进行了验证,给出推荐的设计煤种和校核煤种.结果表明:混煤具有严重结渣倾向;五彩湾煤具有严重的沾污倾向,而乌东煤为低沾污倾向煤种,通过掺烧乌东煤可以减轻五彩湾煤的沾污;推荐选用五彩湾煤与乌东煤的掺烧比例为7∶3和5∶5的混煤1和混煤3分别作为设计煤种和校核煤种.

Physical and chemical properties of Wucaiwan coal,Wudong coal and their mixtures with different blending ratios were respectively analyzed,including the ignition temperature test for pulverized coal,the combustion and slagging tests in a one-dimensional furnace,and the test for contamination properties of coal ash with a 200kW contamination test facility,while the ignition,burn-out and slagging properties of above coal mixtures were evaluated.Final evaluation was performed to main properties of the coal samples using expert system,and the coal ash contamination property was verified with two contamination criteria,based on which suggested design and checking coal were proposed.Results show that the coal mixtures have strong slagging tendency;Wucaiwan coal has strong contamination tendency,while Wudong coal has low contamination tendency.The contamination tendency of Wucaiwan coal can be reduced by blending Wudong coal.The suggested design and checking coal are both mixtures of Wucaiwan and Wudong coal respectively with blending ratios of 7∶3and 5∶5.