热力发电2024，Vol.53Issue(1)：64-72,9.DOI:10.19666/j.rlfd.202309162
液态排渣锅炉全烧和大比例掺烧高碱煤运行优化
Operational optimization on fully burning and high proportion blend burning high-alkali coal in boiler with slag-tap furnace
摘要
Abstract
In order to understand the key parameters and operating experience on fully burning and high proportion blend burning high-alkali coal in boiler with slag-tap furnace,long-term engineering tests were conducted based on a 300 MW boiler with slag-tap furnace in a power plant.An analysis was conducted on the possible combustion organization,nitrogen oxide control,slag flow,and ash deposition issues.Modifications were made to the combustion system,thermal modification system,and slag flow system.So long-term operational data and key parameter records were conducted,after fully burning and high proportion blending burning of 300 000 tons of high-alkali coal,all operating parameters of the boiler were normal.Based on recent operations and comprehensive tests,the optimized boiler with slag-tap furnace in a specific power plant demonstrates strong adaptability to high-alkali coal.Within the control range of coal ash components with w(Al2O3)＜25％,w(Fe2O3)＜15％,12％＜w(CaO)＜30％,silica-alumina ratio＞1.7,acid/alkali ratio＞0.5,the normal operation of the boiler can be ensured without obvious ash deposition.Burning high-alkali coal can effectively reduce the inlet flue gas temperature of the first-level heating surface to below the design value,effectively avoiding the occurrence of slagging on the first-level heating surface of the boiler,and the generation of nitrogen oxides is also reduced by more than 30％compared with using the original design coal.关键词
高碱煤/液态排渣锅炉/运行优化/沾污/结渣Key words
high-alkali coal/boiler with slag-tap furnace/operational optimization/contamination/slagging引用本文复制引用
周昊,李辉,马翔,李丹,张海东,刘笑,邓月海,吴连东,刘宇..液态排渣锅炉全烧和大比例掺烧高碱煤运行优化[J].热力发电,2024,53(1):64-72,9.基金项目
国家重点研发计划项目(2018YFB0604105)National Key Research and Development Program(2018YFB0604105) （2018YFB0604105）
