共查询到19条相似文献,搜索用时 78 毫秒
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叙述了测定环境空气中SO2甲醛法所采样的仪器、吸收管性能、吸收液温度以及室内分析过程中的显色温度、显色时间及稳定性。 相似文献
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进行了填料塔内氨水同时吸收烟气中SO2和CO2的试验研究,分析了进口气体中SO2质量浓度、CO2质量浓度、液气比和氨水质量分数对体积总传质系数KGa的影响.结果表明:随着液气比和氨水质量分数的增大,SO2和CO2的KGa均逐渐增大;随着进口气体中SO2质量浓度的增大,SO2和CO2的KGa均逐渐减小;随着进口气体中CO2质量浓度的增大,SO2的Koa逐渐减小而CO2的KGa逐渐增大;液气比和氨水质量分数对SO2的KGa影响比对CO2的KGa影响大;氨水质量分数对SO2和CO2的Kga影响最大,其次是液气比的影响. 相似文献
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从稀薄气体效应出发,通过对SO2气体分子在CaO脱硫剂颗粒内微尺度孔隙中气体动力学扩散机制的描述,对有效扩散系数进行了修正,建立了基于团聚体概念的Knudsen扩散数学模型,利用误差函数进行求解和简化,得到其函数关系.模拟分析显示:SO2气体分子通过Knudsen扩散向颗粒一级气孔、二级气孔内渗透时,分形孔隙和较大的一级气孔孔隙率都能增大气体向内扩散的阻力,促使径向SO2浓度分布梯度增加.结果表明,分析气体在CaO颗粒内扩散时,忽略气固化学反应等因素而只考虑Knudsen扩散是可行的. 相似文献
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煤制活性焦用于脱除烟道气中的SO2 总被引:3,自引:0,他引:3
考察了山西煤炭化学研究所研制的三种活性炭的吸附与脱附情况,对其SO2吸附能力进行了评价,并讨论了活性焦的物理性质(比表面积及孔径分布)及化学性质(每平方米比表面积的碱性位含量)对其脱硫性能(SO2吸附量及吸附速率)的影响。结果表明,活性焦的微孔是SO2吸附转化的主要场所,合适的孔结构及丰富的表面碱性位可以较大地提高活性炭的脱硫能力。在O2与H2O(g)存在下,吸附SO2的活性焦的脱附情况不仅与脱附温度有关,还受活性焦的物理、化学性质的影响。而且,活性焦的物理、化学性质不仅决定了其对SO2的吸附量,还决定了吸附在活性焦内SO2以不同形式物理吸附SO2、H2SO4存在时的量。 相似文献
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In this study, the water recovery performance from flue gas with ceramic membrane tubes of different pore sizes 30, 50, and 200 nm was experimentally studied. The effects of flue gas temperature, flue gas flow rate, water coolant temperature, and water coolant flow rate on the water recovery performance were analyzed. In addition, in the experimental study of SO2 permeability, the pH of the water coolant inlet and outlet was measured using a pH meter to analyze the SO2 permeability of ceramic membranes during the water recovery process. The results show that the water recovery performance of the 50 nm pore size ceramic membrane is better than that of the other two types of ceramic membrane in most cases. The maximum amount of reclaimed water and the highest water recovery rate are 4.82 kg/(m2·h) and 80.3%, respectively. Under the same SO2 concentration condition, the SO2 permeation flux of the 30 nm pore size ceramic membrane is smallest, and that of the 200 nm membrane is the largest. When the SO2/N2 mixed gas flow rate is 6 L/min, the SO2 permeation flux of the 30 and 200 nm membranes is 0.407 and 0.635 mmol/(m2·h), respectively. The ceramic membrane with smaller pore size can block more SO2 permeation, while the ceramic membrane with larger pore size can remove SO2 better. 相似文献