摘要
以1台330 MW锅炉为研究对象,对低负荷运行时机组的配风及磨煤机组合情况进行数值模拟,研究炉内低负荷工况下的燃烧状况,并以此指导开展低负荷稳燃试验,优化燃烧工况。结果表明:100~120 MW负荷下,炉内火焰的最高燃烧温度仍达到1 500~1 600℃,与满负荷时接近,但高温区域面积较小;由于低负荷时风速较低,实际切圆分布较大;最低不投油稳燃试验可至100 MW,实测燃烧器区域炉膛温度1 210℃;低负荷阶段未发现壁温超温等影响锅炉本体安全性的问题,锅炉本体可以长期安全运行,且不投油稳燃负荷有继续降低的空间。
Taking a 330 MW boiler as the research object,numerical simulation is carried out by changing the air distribution and coal mill combination of the unit during low-load operation.Study the combustion conditions in the furnace under low-load conditions,so as to carry out low-load stable combustion tests and optimize the combustion conditions.The results show that the maximum combustion temperature of the flame in the furnace still reaches 1500-1600℃ under the load of 100~120 MW,which is close to that at full load,but the area of the high temperature zone is small.Due to the low flow velocity at low load,the actual tangent circle distribution at high temperature is larger.The lowest fuel-free stable combustion test can reach 100 MW,and the measured furnace temperature in the burner area is 1210℃.During the low load stage,no problems affecting the safety of the furnace body,such as wall temperature overtemperature,were found.The furnace body can operate safely for a long time,and the ability to stabilize combustion without oil input is sufficient.
作者
丁乙崟
吴剑波
陈是楠
黄永杰
李文华
DING Yiyin;WU Jianbo;CHEN Shinan;HUANG Yongjie;LI Wenhua(Zhejiang Zheneng Wenzhou Electric Power Generation Co.,Ltd.,Wenzhou 325602,China;Zhejiang Energy Group R&-D Co.,Ltd.,Hangzhou 311121,China)
出处
《锅炉技术》
北大核心
2021年第6期29-33,共5页
Boiler Technology
关键词
深度调峰
数值模拟
稳燃试验
燃煤机组
deep peak regulation
numerical simulation
stable combustion test
coal-fired unit
