填料塔内氨法脱硫体系传质过程的实验研究
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摘要
为满足氨法脱硫工艺设计需求,测定和计算了在θ环填料塔中氨法脱硫的气相体积传质系数,并考察了气体流量、吸收液喷淋密度以及氨水质量分数对气相体积传质系数的影响。结果表明,在气体流量增大和吸收液喷淋密度增大的过程中,相对应的气相体积传质系数也会随之增大,另外气体流量对于体积传质系数的影响更加显著。在吸收液中氨水质量分数增加过程中,气相体积传质系数随之增加;进口气体中SO2含量降低,情况亦如此。实验体系中,气相体积传质系数的关联方程式为Kga=0.172 6G0.843L0.116,经实验数据的验证,该公式有一定的可靠性。
In order to meet the requirement of technological design of ammonia desulphurization,the gas phase volume mass transfer coefficient(K_ga) of ammonia desulphurization in θ-ring packed tower was measured and calculated.A nd the effect of gas flow rate,spray density of absorbing liquid and ammonia mass fraction etc on the K_ga was examined.The experiment showed that corresponding K_ga gradually increased with the increase of the gas flow rate and the spray density of absorbing liquid.A nd the effect of the gas flow rate on the K_ga was more remarkable.A s the mass fraction of ammonia in the absorbent solution increased and the SO_2 content in inlet gas decreased,the K_ga increased gradually.In the experimental system,the correlation equation of K_ga was that:K_ga=0.172 6G~(0.843)L~(0.116).Through validation of the experimental data,this correlation equation had certain reliability.
In order to meet the requirement of technological design of ammonia desulphurization,the gas phase volume mass transfer coefficient(K_ga) of ammonia desulphurization in θ-ring packed tower was measured and calculated.A nd the effect of gas flow rate,spray density of absorbing liquid and ammonia mass fraction etc on the K_ga was examined.The experiment showed that corresponding K_ga gradually increased with the increase of the gas flow rate and the spray density of absorbing liquid.A nd the effect of the gas flow rate on the K_ga was more remarkable.A s the mass fraction of ammonia in the absorbent solution increased and the SO_2 content in inlet gas decreased,the K_ga increased gradually.In the experimental system,the correlation equation of K_ga was that:K_ga=0.172 6G~(0.843)L~(0.116).Through validation of the experimental data,this correlation equation had certain reliability.
引文
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[4]李征。我国燃煤电厂石灰石-石膏湿法烟气脱硫技术的现状及发展趋势[J].黑龙江科技信息,2015(19):22-22.
[5]钟秦。燃煤烟气脱硫脱硝技术及工程实例[M].北京:化学工业出版社,2007.
[6]赵毅,马双忱,黄建军,等.高活性吸收剂脱硫和脱氮实验及机理研究[J].中国电机工程学报,2003,23(10):236-240.
[7]周屈兰,徐通模,惠世恩.我国自主开发的湿法脱硫技术及其应用[J].动力工程学报,2006,26(2):261-266.
[8]闫晓光,熊理想,马宏金,等.FCL氨法烟气脱硫技术特点及应用[J].电力科技与环保,2008,24(2):11-12.
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[11]DEY A,AROONWILAS A.CO2absorption into MEA-AMP blend:Mass transfer and absorber height index[J].Energy Procedia,2009,1(1):211-215.
[12]王伟之,张锦瑞,张书廷,等.填料塔中钠碱溶液吸收低浓度SO2的体积传质系数[J].环境工程学报,2008,2(6):802-805.