摘要
为了充分利用气动旋流强化单塔循环脱硫效率的优势,实现燃煤电站烟气SO_(2)超低排放,采用pH分区供浆耦合气动旋流塔技术脱除燃煤烟气中的SO_(2),并研究了pH分区供浆模式下浆液pH及其差值的变化,分析了pH分区供浆对气动旋流塔脱硫性能的影响。结果表明:空塔喷淋运行工况,pH分区供浆对脱硫效率影响较小;单层循环pH分区供浆耦合气动旋流工况,pH分区供浆的脱硫效率高于主浆池直接供浆,且对脱硫效率的促进作用随主浆池pH增大而减弱。此外,双层循环pH分区供浆耦合气动旋流工况下,pH分区供浆量越大脱硫效率提高越多,且随主浆池pH增大而逐渐减弱。以上研究结果证明,pH分区供浆可提高气动旋流塔的脱硫性能。
In order to make full use of the advantages of pneumatic hydrocyclone enhancing the efficiency of single tower circulationg desulfurization and realize the ultra-low emission of SO_(2)in the flue gas of coal-fired power plant,in this study,the technology of dual-pH slurry supply coupled aerodynamic swirl tower was used to remove SO_(2)in the flue gas of the coal-fired power plant,and the slurry pH change and difference under the dualpH slurry supply mode were systematically investigated,and the effect of the dual-pH slurry supply system on the desulfurization performance of the aerodynamic swirl tower was analyzed.The results showed that the dualpH slurry supply had slight effect on the desulfurization efficiency under the operation condition of the empty tower.However,the desulfurization efficiency of the dual-pH slurry supply was significantly higher than that of the main slurry tank supply under the operation condition of the dual-pH slurry supply of single layer circulation coupling pneumatic swirl,and the promoting effect on the desulfurization efficiency decreased with the increase of the pH of the main slurry tank,The experimental results were consistent with the trend of the slurry pH calculation results.In addition,under the operation condition of the dual-pH slurry supply of double layer circulation coupling pneumatic swirl,the higher the dual-pH slurry supply,the more the desulfurization efficiency increases,and it gradually decreased with the increase of the pH in the main slurry tank.This study proves that the dual-pH slurry supply can improve the desulfurization performance of the pneumatic hydrocyclone,which can provide a reference for the performance improvement of the pneumatic hydrocyclone and the ultra-low emission reconstruction of the desulfurization device.
作者
郭志
刘志敏
GUO Zhi;LIU Zhimin(Aerospace Environmental Engineering Co.Ltd.,Tianjin 300301,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第2期635-642,共8页
Chinese Journal of Environmental Engineering
基金
天津市科技计划项目(17ZXSTSF00030,18YFYSZC00070,19ZXSZSN00050)。
关键词
气动旋流塔
湿法烟气脱硫
脱硫效率
pH分区供浆
aerodynamic swirl tower
wet flue gas desulfurization
desulfurization efficiency
dual-pH slurry supply
