| Desulfurization during combustion, featured with low capital, low operating cost, simple technics, emerges as an available sulfur dioxide control technology which is suited to the current national conditions. However,common limestone has different activity of sulfation reaction because of different geological condition, different inner structure and different composition.Along with the development of the Chinese economy, a mass of industry wastes had been exhausted. The environment had been serious polluted. As the wastes had plenty of calcium based materials, the industry alkalinous wastes could be used as a new coal combustion sulfur capture sorbent so as to protect our environment. This thesis aims at study the sulfur capture characteristics of the industry alkalinous wastes.First of all, the additive effects of Fe2O3, Al2O3, MnCO3 and Ba(OH)2 on CaO sulfation were investigated. The results show that: additions of Fe2O3,Al2O3,MnCO3 and Ba(OH)2 can enhance the sulfur capture characteristic of CaO.The sulfur capacities of CaO increase 13～25mg. The optimal additive values are 2% (Fe2O3), 8% (Al2O3, 6%(MnCO3) and 2%(Ba(OH)2).Secondly, the sulfur capture characteristics of the industry alkalinous wastes were investigated.The results show that: the industry alkalinous wastes which are used in experiment(shortened title: the experimental wastes) have better sulfur capture ability, the sulfur capacities of the experimental wastes are higher than that of the experimental limestone in a broad temperature range about 800～1100℃ . The temperature characteristics of the experimental wastes are better than that of limestone in desulfurization reaction.How the experimental wastes affect the sulfur release process was researched. The results show that: white clay and carbide slag could effectual capture the release of sulfur in 800～1100℃ . Salt slurry,alkali slag and red mud... |
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