Experimental Investigation on a 0.35MWth Coal-fired Horizontal Circulating Fluidized Bed Boiler
The capacities of industrial coal-fired boilers are normally less than 20-30MWe.And these coal-fired boilers of low capacity are facing the severe situation of low efficiency and heavy environmental pollution.Hence,an innovative horizontal circulating fluidized bed (HCFB) boiler was developed to enhance heat efficiency and reduce pollutant emission of industrial boilers in China.The chamber in the HCFB boiler consists of primary combustion chamber,secondary combustion chamber and burnout chamber,which were combined horizontally side by side.To verify the conception of horizontal fluidized circulation and to obtain the characteristic data,a 0.35 MWth coal-combustion HCFB boiler was designed and installed to perform some experiments of combustion and mass circulation.In the boiler there were two mass circulating paths,one is inner circulating through the inertia separator and another was external circulating through the cyclone separator.The connection bottom of the secondary chamber and the burnout chamber was designed as an inertia separator,in which separated and collected solid materials were returned to the primary combustion.In fact the secondary separator was a small cyclone separator connecting to the exit of the burnout chamber.Heat efficiency and separating efficiency of the experimental boiler were measured and analyzed.Furthermore,mass and temperature distribution along the chambers height were also investigated.The results showed that the heat efficiency of the bare boiler was 82％.The mass balance based on ash content was measured and analyzed.Separating efficiency of the inertia separator and cyclone separator was 60％ and 99.9％,respectively.It showed that the two stage material separation and circulation enhanced coal combustion in the HCFB boiler and help to minimize the height of the furnace.
Horizontal Circulating Fluidized Bed (HCFB) Boiler Industrial Boiler Mass Balance Heat Efficiency Separating Efficiency
Meng Aihong Li Qinghai Zhang Yanguo Wang Zhaojun Dang Wenda
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Tsinghua Universit Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Tsinghua Universit Beijing Nowva Energy Technology Co.,Ltd.,Beijing 100084,China
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
443-446
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）