煤粉锅炉膜法富氧局部助燃技术开发及应用  

Development and Applied Research of Local Combustion-supporting Technology Involving a Membrane-method-based Oxygen Enrichment for Pulverized Coal-fired Boilers

作　　者：张家元[1] 周孑民[1] 阳绍伟[2] 陈乔平 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]长沙有色冶金设计研究院,湖南长沙410011 [3]中铝公司河南分公司热力厂,河南郑州450041

出　　处：《热能动力工程》2007年第4期391-394,共4页Journal of Engineering for Thermal Energy and Power

基　　金：中国博士后基金资助项目(291054)

摘　　要：针对150t/h煤粉动力锅炉存在的高温腐蚀、结焦、热效率低及无油助燃低负荷稳燃能力差等问题,利用膜法富氧技术,首次开发了局部富氧助燃技术,设计了膜法富氧局部助燃系统,进行了局部增氧助燃技术应用于煤粉锅炉的工业试验。实践证明,大渣及飞灰可燃物含量降低,锅炉热效率提高了2.5%以上;降低了NOx排放浓度,在120～150t/h负荷下为627～768mg/m3;提高了低负荷不投油稳燃能力,可以在50%额定负荷下断油稳燃;有效解决了炉膛结渣和高温腐蚀等问题,为煤粉锅炉的安全、经济、环保运行开辟了一个新方向。In the light of various problems existing in a 150 t/h pulverized coal-fired boiler,such as high-temperature corrosion,slagging,low thermal efficiency and inferior combustion stability at low loads when no oil is used for combustion support etc.,the authors have by adopting membrane method-based oxygen enrichment techniques developed local combustion-supporting technology featuring oxygen enrichment and designed a combustion-supporting system based on the above technology.Industrial experiments applying the technology under discussion were conducted for a pulverized coal-fired boiler.Practice has shown that with a reduction in combustible content in large slags and in fly ash,the thermal efficiency of the boiler has been increased by over 2.5%,the NOx emission concentration lowered (627～768 mg/m3 at a load of 120～150 t/h) and the combustion stability at low operating loads (50% of rated load) enhanced with no oil being provided for combustion support.As a result,various problems,such as slagging in furnace and high-temperature corrosion,have been effectively solved,blazing a new path for the safe,economical and environment-friendly operation of pulverized coal-fired boilers.

关 键 词：煤粉锅炉 膜法富氧 局部助燃 节能 环保 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程] TK229.6