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氯和钾在燃烧过程中以气态析出,是引起生物质直燃锅炉受热面积灰及腐蚀问题的主要原因,利用马弗炉在650、700、750、800和850℃5个温度下燃烧麦秆、稻秆、玉米秆、棉花秆、油菜杆和稻壳6种生物质,分别使用离子计和原子发射光谱法测量吸收液中的氯和钾浓度,研究这6种生物质燃烧过程中氯和钾的析出特性。结果表明:不同温度下,Cl和K以气态析出的量有明显差别,保持温度低于750℃即可有效抑制两者析出进入烟气。
Chlorine and potassium, which are precipitated in the gaseous phase during the combustion process, are the main causes of the ash and corrosion problems of the biomass-fired direct fired boilers. Combustion of wheat straw at 650, 700, 750, 800 and 850 ℃ with a muffle furnace , 6 kinds of biomass of rice straw, corn stalk, cotton stalk, rape straw and rice husk. The concentrations of chlorine and potassium in the absorbing liquid were measured by ion meter and atomic emission spectrometry respectively. The effects of chlorine and potassium Potassium precipitation characteristics. The results show that there are obvious differences in the amount of Cl and K precipitated at different temperatures. When the temperature is lower than 750 ℃, the precipitation of both Cl and K into the flue gas can be effectively suppressed.