电力科技与环保2025，Vol.41Issue(3)：506-516,11.DOI:10.19944/j.eptep.1674-8069.2025.03.015
异相凝并脱除燃煤烟气细颗粒态重金属的模拟研究
Simulation study of heterogeneous coagulation and removal of heavy metals in the fine particulate state
摘要
Abstract
[Objective]The coal combustion process releases various heavy metal elements,which are easily concentrated on the easy-to-escape fine particles.By placing a heterogeneous agglomeration system in the flue before the electrostatic precipitator(ESP),the heavy metal elements in the flue gas can be effectively absorbed to make it from the fine particle state,the gas state to the coarse particle state,thereby improving the removal efficiency of these elements by ESP.[Methods]In this paper,Monte Carlo method is adopted to simulate the agglomeration process,and the particle group balance equation is used to solve the adsorption process of the agglomeration adsorbent on the particulate heavy metal,and the distribution of heavy metal arsenic in the particulate matter before and after the adsorption under different flow rates of the coagulation adsorbent is obtained.[Results]The results show that after coagulation,the content of heavy metals on fine particles below 1 μm decreases continuously,and the peaks of particles and heavy metals appear between 4.3～10 μm.At the same time,with the increase in the flow rate of the adsorbent,the heavy metals on the fine particles decrease significantly,and the peak value of the coarse particle segment continues to rise.It can be calculated that when the condensed adsorbent content reaches 8ml/m3,the adsorption efficiency of fine particles was as high as 89.51%,and the adsorption efficiency of fine particulate arsenic reached 92.33%.In addition,the increase in residence time and coagulant injection rate can enhance the effect of coagulation and adsorption,thereby improving the removal efficiency of ESP and realizing the efficient removal of heavy metals in the tail flue gas of coal-fired power plants.[Conclusion]The conclusion can provide theoretical guidance for the transformation of the tail gas of coal-fired power plants with ultra-low emission of heavy metals.关键词
异相凝并/蒙特卡洛/重金属/砷Key words
Heterogeneous agglomeration/Monte Carlo/trace element/arsenic分类
能源科技引用本文复制引用
徐宪龙,马海波,王东旭,孙道荣,吴桐,刘静超,熊卓,张军营,赵永椿..异相凝并脱除燃煤烟气细颗粒态重金属的模拟研究[J].电力科技与环保,2025,41(3):506-516,11.基金项目
武汉市重点研发计划项目(2023020402010621) （2023020402010621）
