摘要
基于胜利煤田高水分低热值褐煤特性,从搭建1∶1尺寸热态试验台验证大功率等离子点火技术点燃该煤种的可行性入手,通过冷态调平试验、逻辑优化、制粉系统启停参数优化、燃烧调整等,探索了能够可靠点燃胜利煤田高水分低热值褐煤的等离子启弧功率(最低电压、最低电流)、一次风温、一次风速、煤粉质量浓度等技术参数,研究了大功率等离子点火技术在国家能源集团胜利发电厂(以下简称国能胜利电厂)的现场调试及生产应用情况,分析了等离子发生器电流、一次风温、一次风速、煤质变化对其点火性能和燃烧稳定性的影响。结果表明:通过调整等离子电流、一次风温和风速,能够实现大功率等离子点火技术对胜利煤田高水分低热值褐煤的点燃和稳燃,实现了无油点火、无油稳燃在660 MW超超临界机组的应用。
Based on the characteristics of high moisture and low calorific value lignite in Shengli coal field,starting from establishing a 1∶1 scale hot state test bench to verify the feasibility of high-power plasma ignition technology to ignite this coal type,through cold leveling tests,logic optimization,pulverized coal system start-stop parameter optimization,combustion adjustment,etc.,the technical parameters such as plasma arc ignition power(minimum voltage,minimum current),primary air temperature,primary air speed,pulverized coal mass concentration,etc.that can reliably ignite Shengli coal field high moisture and low calorific value lignite were explored.The research investigated the field commissioning and production application of high-power plasma ignition technology in CHN Energy Shengli Power Plant(hereinafter referred to as"Shengli Power Plant"),and analyzed the impact of plasma generator current,primary air temperature,primary air speed,and coal quality changes on its ignition performance and combustion stability.The results show that by adjusting the plasma current,primary air temperature,and air speed,the high-power plasma ignition technology can achieve ignition and stable combustion of high-moisture lowcalorific value lignite in the Shengli coal field,realizing the application of 660 MW ultra-supercritical units without oil ignition and stable combustion.
作者
卫翔
孟宪春
田亚钊
卫大为
WEI Xiang;MENG Xianchun;TIAN Yazhao;WEI Dawei(CHN Energy Shengli Power Plant,Xilinhot,Inner Mongolia 026000;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an,Shaanxi 710054)
出处
《能源科技》
2023年第5期45-49,共5页
Energy Science and Technology
基金
国家能源集团中华神华能源股份有限责任公司科技创新项目(SHGF-18-69)。
关键词
超超临界
等离子
高水分低热值褐煤
锅炉点火
无油点火
节能降耗
Ultra Supercritical
Plasma
High Moisture and Low Calorific Value Lignite
Boiler Ignition
Oil-free Ignition
Energy Conservation and Consumption Reduction
