摘要
以山东省完成超低排放改造的某燃煤电厂为研究对象,开展了烟气脱硫系统运行诊断和研究,通过现场实际测量和DCS数据分析等手段研究脱硫系统运行和经济性指标。研究结果表明:单台浆液循环泵的电耗与其对脱硫效率的影响并不线性相关,在相似工况和脱硫效率前提下,不同浆液循环泵组合的脱硫系统电耗最高相差约16%;随着塔内浆液p H值的提升,脱硫系统钙硫比和石灰石耗量增加,通过塔内浆液pH值运行优化调整,石灰石消耗量可降低7%,脱硫效率得到改善,且运行成本变化较小;石膏旋流器底流密度和石膏含水率随石膏旋流器入口压力增加而变大,而与旋流子投运个数无明显关系。该结论可为脱硫系统高效稳定运行提供数据支撑。
Taking a coal-fired power plant that has completed ultra-low emission reform in Shandong Province of China as the research object,systematic diagnosis and analysis of operating conditions for flue gas desulfurization system were carried out,and the operational and economic indicators of the desulphurization equipment were studied through actual measurements and DCS data analysis.The results show that,the power consumption of a single slurry circulation pump is not linearly related to the desulfurization efficiency.Under the similar working conditions and with the same desulfurization efficiency,the largest difference in power consumption among different slurry circulation pumps combinations is approximately16%.The ratio of Ca to S and limestone consumption in the desulfurization system increases with the pH value of the slurry in the tower.Via optimizing and adjusting the pH value,the consumption of limestone can be reduced by7%,the desulfurization system's desulfurization efficiency was enhanced,and the operation cost changes slightly.The underflow density and gypsum moisture content becomes larger with the increase of inlet pressure of the gypsum cyclone,and has no obvious relationship with the number of cyclone unit.This paper provides data support for the efficient and stable operation of desulphurization system.
作者
牛拥军
宦宣州
李兴华
NIU Yongjun;HUAN Xuanzhou;LI Xinghua(Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China)
出处
《热力发电》
CAS
北大核心
2018年第12期22-28,共7页
Thermal Power Generation
基金
中国华能集团有限公司总部科技项目(HNKJ17-H11)~~
关键词
燃煤发电厂
超低排放
湿法脱硫
运行优化
经济性
节能减排
coal-fired power plant
ultra-low emission
wet flue gas desulphurization
operating optimization
economy
energy saving and emission reduction
