330 MW机组煤粉锅炉耦合油污泥低负荷燃烧数值模拟与试验研究  

Numerical simulation and experimental research on oil sludge co-firing in a 330 MW pulverized-coal boiler at low load condition

作　　者：张海丹 张凡志[3] 方仙明 梁震 张光学[4] ZHANG Haidan;ZHANG Fanzhi;FANG Xianming;LIANG Zhen;ZHANG Guangxue(Zhejiang Energy R&D Institute Co.,Ltd.,Hangzhou 311121,China;Zhejiang Key Laboratory of Energy Conservation&Pollutant Control Technology for Thermal Power,Hangzhou 311121,China;Taizhou Power Plant of Zhejiang Zheneng Electric Power Co.,Ltd.,Taizhou 318016,China;Institute of Energy Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]浙江浙能技术研究院有限公司,浙江杭州311121 [2]浙江省火力发电高效节能与污染物控制技术研究重点实验室,浙江杭州311121 [3]浙江浙能电力股份有限公司台州发电厂,浙江台州318016 [4]中国计量大学能源工程研究所,浙江杭州310018

出　　处：《热力发电》2024年第3期153-160,共8页Thermal Power Generation

基　　金：浙能集团科技项目资助(ZNKJ-2022-015)。

摘　　要：针对含油污泥的无害化处置问题,提出预处理后送入煤粉锅炉与煤粉耦合燃烧的技术路线,在330 MW机组四角切圆锅炉上做了改造,并进行了含油污泥的热重分析及含油污泥入炉后的数值模拟,开展了油污泥入炉低负荷稳燃试验。结果表明:含油污泥具有易着火且热值接近动力煤的特点,可提高锅炉低负荷稳燃能力;含油污泥入炉后火焰中心略微下移,排放的烟气NO_(x)量有所降低;锅炉最低稳燃负荷率可低至20.00%,对应燃烧器层炉膛温度上升30~50℃,煤粉燃烧器火检信号更稳定,飞灰含碳量从4.79%降至3.80%,证明了油污泥对低负荷工况下煤粉燃烧的促进作用;120 MW负荷下含油污泥入炉后,锅炉效率提高约0.23百分点,可降低供电煤耗率约0.7 g/(k W·h),含油污泥热值可替代标准煤约3.7 t/h,节能效果显著。A method was proposed to solve the problem of oil sludge treatment environmentally by sending the pretreated oil sludge into a 330 MW pulverized coal boiler co-firing with coal.The combustion characteristics of the oil sludge were studied by thermogravimetric analysis,and it was proved to be easy to ignite with a high calorific value close to coal,which could improve the boiler’s low-load stable combustion ability.Numerical simulation results showed that the combustion center shifted downward slightly after the oil sludge was sent into the boiler,while the NO_(x) content decreased.The experimental results proved that the minimum stable combustion load rate can be 20.00%by the benefit of oil sludge co-firing.The temperature at the coal-burner layer increased by 30~50℃and the carbon content of the fly ash decreased from 4.79%to 3.80%.The fire detection analog signal of the coal burner was found to be more stable which validated the positive effect of the oil sludge co-firing at low load condition.The boiler efficiency increased by 0.23 percentage point which reduced the net coal consumption rate by 0.7 g/(kW·h).Moreover,about 3.7 t/h coal was saved at 120 MW load.The method was verified to have a significant energy-saving effect.

关 键 词：含油污泥 锅炉 耦合燃烧 低负荷稳燃 

分 类 号：TM621.2[电气工程—电力系统及自动化]