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首页> 外文期刊>Journal of Environmental Sciences >A pilot-scale jet bubbling reactor for wet flue gas desulfurization with pyrolusite
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A pilot-scale jet bubbling reactor for wet flue gas desulfurization with pyrolusite

机译：中锰矿湿法烟气脱硫中试喷射鼓泡反应器

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摘要

MnO_2 in pyrolusite can react with SO_2 in flue gas and obtain by-product MnSO_4 centre dot H_2O. A pilot scale jet bubbling reactor was applied in this work. Different factors affecting both SO_2 absorption efficiency and Mn~(2+) extraction rate have been investigated, these factors include temperature of inlet gas flue, ration of liquid/solid mass flow rate(US), pyrolusite grade, and SO_2 concentration in the inlet flue gas. In the meantime, the procedure of purification of absorption liquid was also discussed. Experiment results indicated that the increase of temperature from 30 to 70 K caused the increase of SO_2 absorption efficiency from 81.4 percent to 91.2 percent. And when SO_2 concentration in the inlet flue gas increased from 500 to 3000 ppm, SO_2 absorption efficiency and Mn~(2+) extraction rate decreased from 98.1 percent to 82.2 percent and from 82.8 percent to 61.7 percent, respectively. The content of MnO_2 in pyrolusite had a neglectable effect on SO_2 absorption efficiency. Low L/S was good for both removal of SO, and Mn~(2+) extraction. The absorption liquid was filtrated and purified to remove Si, Mg, Ca, Fe, Al and heavy metals, last product MnSO_4 centre dot H_2O was obtained which quality could reach China GB1622-86, the industry grade standards.
机译：软锰矿中的MnO_2可与烟气中的SO_2反应，得到副产物MnSO_4中心点H_2O。在这项工作中应用了中试规模的喷射鼓泡反应器。研究了影响SO_2吸收效率和Mn〜（2+）萃取速率的不同因素，这些因素包括进气口烟气温度，液/固质量流量比（US），软锰矿品位和进气口SO_2浓度。烟气。同时，对吸收液的纯化方法进行了讨论。实验结果表明，温度从30 K增加到70 K导致SO_2吸收效率从81.4％增加到91.2％。当进口烟气中的SO_2浓度从500ppm增加到3000ppm时，SO_2的吸收效率和Mn〜（2+）的萃取率分别从98.1％降低到82.2％和从82.8％降低到61.7％。软锰矿中MnO_2的含量对SO_2吸收效率的影响可忽略不计。低L / S有利于SO的去除和Mn〜（2+）的萃取。将吸收液过滤提纯，去除硅，镁，钙，铁，铝和重金属，得到的最终产物MnSO_4中心点H_2O可以达到中国工业标准GB1622-86。

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