摘要
燃煤烟气中的SO_3浓度低、化学性质活泼,一直是国内燃煤电厂污染物测试的难点。针对"控制冷凝法"测试SO_3捕集效率低的问题,依托自制的SO_3校准发生装置进行试验研究。结果表明:通过采用D型蛇形管+硼硅玻璃纤维滤膜过滤装置,采样流量为20L/min以及精准控制采样管、过滤器、蛇形管和滤膜过滤装置的伴热温度,可以确保SO_3捕集效率达到90%以上,因而可保证烟气SO_3的捕集效率和测试结果的准确性。改进后的方法已在模拟试验(低尘、含湿、不同SO_3含量)中得到良好应用,进而可用于燃煤电厂烟气SO_3测量。
Because of the low concentration and active chemical properties, it has always been difficult to detect SO3 in the coal burning flue gas for pollutant inspection domestically and abroad. Aiming at the problem of the low collection efficiency of SO3 detection by control condensation method, the experiment was conducted based on the homegrown SO3 calibration system. Study results show that: the collection efficiency can be effectively improved to over 90% through the application of the D-type condenser and filter membrane filter device with borosilicate glass fiber membrane, if the optimal sampling flow rate was kept at 20 L/min, and the heating temperature of sample tube, condenser pipe and filter was controlled precisely. Hence both the collection efficiency of SO3 detection and the accuracy of test result are guaranteed. The enhanced control condensation method has been widely used in computer simulations under the conditions of low dust content with certain moisture and various concentrations of SO3, and consequently can be implemented to examine the SO3 concentration in fume for the entire coal-fired power industry.
作者
陈威祥
郭俊
叶兴联
刘锡尧
陈永强
郑芳
龚国汉
CHEN Weixiang;GUO Jun;YE Xinglian;LIU Xiyao;CHEN Yongqiang;ZHENG Fang;ONG Guohan(State Environmental Protection Engineering and Technology Center for Power Industrial Dust Control, Longyan 364000, China;School of Metallurgy, Northeastern University, Shenyang 110819, China;Fujian Longking Co.,Ltd., Longyan 364000,China;Longyan Institute of Quality Inspection for Products, Longyan 364000, China)
出处
《中国电力》
CSCD
北大核心
2019年第3期43-48,共6页
Electric Power
基金
国家重点研发计划资助项目(低成本超低排放技术与高端制造装备
2016YFC0203703)
福建省质量技术监督局科技项目资助(烟气中SO_3的采样和测定方法研究
FJQI2017041)~~
