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2008年全国冶金物理化学学术会议

作者： Wu Fuzhong~* Cai Jiuju (Key Laboratory on Eco-Industry,Northeastern University,Shenyang 110004,China)

The BF-converter process of modem iron and steel co-corporation is a chemical process of iron and coal. Sulfur dioxide is released in sintering process which can be absorbed by Pyrolusite and Mild manganese to produce manganese sulfate. The experiments of removal of so are held in the conditions that using mild manganese, the pH scale of pulp is controlled;of pyrolusite, the oxidability of MnO and reducibility of so are utilized;and the pyrolusite pulp is put into the absorption tower of padding. The above-90% absorptivity of flue dust indicates that wet dust collection is available to this technique, in which the absorptivity of so is above 95%, and the byproduct manganese sulfate is produced to technical grade. The technique is proved to be a new technology on the: removal of so, which really changes wastes into valuables and conforms to comprehensive treatment.

关键词： sitering gas pyrolusite mild manganese mine removal of so2 manganese sulfate

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Study on the removal of so_2 from Simulated Flue Gas Using Dry Calcium-Spray with DBD Plasma

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Plasma Science and Technology 2008年第1期10卷 106-110页

作者：依成武吴春笃陈志刚欧红香邵学军 School of Environment University of Jiangsu Zhenjiang 212013 China

In this study, lime-hydrate （Ca（OH）2） desulfurizer was treated by plasma with strong ionization discharge of a dielectric barrier. The removal of so2 from simulated flue gas was investigated. The principles of so2 removal are discussed. Several factors affecting the efficiency of so2 removal were studied. They included the ratio of calcium to sulfur （Ca/S）, desulfurizer granularity, residence time of the flue gas, voltage applied to the discharge electrode in the plasma generator, and energy consumption. Experimental results indicate that the increase in Ca/S ratio, the applied voltage and discharge power, the residence time, and the reduction in the desulfurizer granularity all can raise the so2 removal efficiency. The so2 removal efficiency was up to 91.3% under the following conditions, namely a primary concentration of so2 of 2262×10^-6 （v/v） in the emission gas, 21%（v/v） of oxygen, 1.8% （v/v） of water, a Ca/S ratio of 1.48, a residence time of 2.8 s, a 3.4 kV voltage and a 10kHz frequency power applied to the discharge electrodes in the plasma generator, and a flow rate of 100 m^3/h for emission gas.

关键词： plasma strong ionization discharge Ca(OH)2 so2 removal of so2

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