600MW高水分褐煤锅炉变负荷特性试验  

Experimental Investigation on the Varying Load Characteristic for 600MW Boiler Burning with High Water Content Lignite

作　　者：张清峰[1] 曹红加[1] 李俊忠[2] 问树荣[2] 

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]内蒙古上都发电有限责任公司,内蒙古正蓝旗027200

出　　处：《锅炉技术》2011年第2期32-35,共4页Boiler Technology

摘　　要：由于高水分褐煤的低发热量和易结渣特性,锅炉一般采用非常低的炉膛容积热负荷和非常低的炉膛断面热负荷。该类型的褐煤锅炉变负荷速率低于普通烟煤锅炉。进行了一次风压、燃烧器负荷分配、二次风配风调整等对锅炉变负荷影响的试验。试验结果表明:在机组需要快速升负荷时,先提高一次风压,然后增加给煤量可以提高锅炉的升负荷速率。如果锅炉的氧量偏差不大,可以短期内不增加送风量。适当优先增加上层燃烧器的给煤量,可以提高锅炉的升负荷速率。机组协调投运时,负荷变化率最大不超过5～6MW/min。The boiler burning with high water content lignite commonly has very low furnace cubage heat loading and cross section heat loading for the coal has the characteristic of low heat productivity and easily slagging. The varying load velocity of this kind lignite boiler is universally lower than the bituminite boiler＇. Influence of primary air pressure, burner load distribution and second air distribution on varying load velocity is gained through experiment. Increasing the primary air pressure firstly and then supplying coal can increase varying load velocity. If the flue gas oxygen is suitable, the second air need not supply at short period. Priority of upper burner coal supply can increase the varying load velocity. The max varying load velocity is 5-6 MW/min when the power unit inputs coordinated control.

关 键 词：高水分褐煤 变负荷 一次风压 燃烧器负荷分配 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]