摘要
煤粉制备系统是火力发电厂燃煤锅炉必不可少的主要系统之一,其运行的安全可靠性和经济性直接影响到锅炉机组的性能,而磨煤机又是制粉系统中关键设备。介绍了中速磨煤机的密封现状,指出了漏粉原因,并提出了相应的改造方案,同时对磨煤机改造前后进行了对比分析。通过改造,不仅有效地消除了漏风和漏粉现象,而且改善了工作环境,提高了运行的经济性。因此对中速磨煤机进行密封改造具有十分重要的意义。
A pulverized coal preparation system is one of the indispensable main systems for coal-fired boilers in thermal power plants and its operation safety,reliability and cost-effectiveness directly affect the safety and reliability of boiler units.Moreover,the pulverizer constitutes a main link in the milling system and meanwhile is also regarded as a weak one.The status quo of seal systems of race pulverizers is described with the causes of pulverized-coal leakage being pinpointed and corresponding modification schemes proposed.In the meantime,a contrast analysis is conducted of two cases,i.e.before and after the modification of the pulverizer.Through the modification,the air and pulverized-coal leakage phenomena have been effectively eliminated with the working environment being improved and operation cost-effectiveness enhanced.Therefore,it is of major significance to conduct a modification of the seal system for the race pulverizer.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2007年第2期185-186,200,共3页
Journal of Engineering for Thermal Energy and Power
基金
中国矿业大学校基金资助项目(2006A021)
关键词
锅炉制粉系统
中速磨煤机
漏粉
密封改造
boiler milling system,race pulverizer,pulverized-coal leakage,seal system modification
