电站燃煤锅炉煤粉细度控制值研究.pdfVIP

王春昌 西安热工研究院有限公司, 陕西 西安 710032 [ ] 提出了一定条件下煤粉颗粒完全燃尽临界直 的概念, 并依据煤粉颗粒分布特性和煤 粉颗粒燃尽临界直 计算得出不同煤粉细度分布下的未燃尽率, 分析了煤粉颗粒燃尽 临界直 煤粉细度挥发分含量等对未燃尽率的影响分析表明, 对于低挥发分难燃 煤种, 按挥发分确定煤粉细度的经验公式计算值与经济煤粉细度值相比偏大; 对于 Vdaf 35% 的燃煤, 按挥发分确定煤粉细度的经验公式计算值与经济煤粉细度值相比偏小; 对于其它燃煤, 按挥发分确定煤粉细度的经验公式计算的煤粉细度值在经济煤粉细度 值范围内,但经济煤粉细度值需要通过试验确定 [ ] 锅炉; 煤粉细度; 未燃尽率;飞灰可燃物; 制粉电耗; 挥发分 [ ] T K16 [] A [ ] 2011 [ DOI ] 10.3969/j.issn. 2011.01.048 STUDY ON THE FINENESS CONTROLLED VALUE OF PULVERIZED COAL FOR COALFIRED BOILERS IN THERMAL POWER PLANTS WA G Chunchang Xi an T hermal Power Research Institute Co Ltd, Xi an 710032, Shaanxi Province, PRC Abstract :A concept of critical particle size of pulverized coal which can be fully burnt away under cer tain conditions has been put forward, and an unburnt away rate under different distribution of pulver ized coal fineness being obtained through calculation on the basis of particle size distribution behavior of thepulverized coal and the critical particle size under burnt away condition of thepulverized coal,the influence of critical particle size during burnt away of the pulverized coal, the fineness of pulverized coal,and the volatile matter content etc.upon the unburnt away rate being analysed. Analysis shows that the calculated value from emperical formula of the volatile matter content is somewhat greater than that of the economicfineness of pulverized coalfor