典型碱基吸收剂对燃煤烟气中SO3的脱除性能实验Experiment on removal performance of SO3 from coal-fired flue gas using typical base-type absorbents
李泽华,周俊波,郭彦君,王睿东,李晓宇,张鑫,李新奥,卿梦霞
摘要(Abstract)：
燃煤烟气中SO_3的生成与排放严重威胁着电厂的安全经济运行与大气环境。为此研究了钠基、钙基与镁基吸收剂对SO_3脱除性能，以及Na_2CO_3、Ca(OH)_2与CaO 3种碱基吸收剂在不同运行工况下的SO_3脱除性能变化。结果表明：在SO_2与SO_3共存的条件下，吸收剂均会优先与烟气中的SO_3发生反应，各种吸收剂对SO_3的脱除效果从高到低顺序为Na_2CO_3>NaHCO_3>Mg(OH)_2>MgO>Ca(OH)_2>CaO；在一定实验条件下，当吸收剂与SO_2化学当量比达2:1后，所有吸收剂对SO_3的脱除效率均可达80%以上；对NaHCO_3、Ca(OH)_2、CaO 3种吸收剂进行煅烧预处理后，其对SO_3的脱除率略有提高；反应温度、化学当量比和SO_3初始质量浓度等参数的增加均有利于吸收剂对SO_3的脱除，而在适当范围内提高H_2O体积分数有利于吸收剂对SO_3的脱除；吸收剂显著过量时，外扩散是影响化学反应速率的主要控制步骤，而吸收剂类型对其影响较小。
关键词(KeyWords)： 燃煤烟气;SO_3;碱基吸收剂;脱除性能
基金项目(Foundation): 国家自然科学基金项目(52106131,52476102)~~
作者(Author): 李泽华,周俊波,郭彦君,王睿东,李晓宇,张鑫,李新奥,卿梦霞
DOI: 10.19666/j.rlfd.202411253
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