科研之友
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摘要
Flue gas desulfurization tests were carried out in a one-dimensional coal-fired furnace with fly ash used in the dry way, with simulated moisture addition in back-end ductwork as well as with fly ash slurry. Test results show that with high calcium containing fly ash as the absorbent, a certain desulfurization effect can be obtained by administering it either in the furnace or in the back-end ductwork. It was also found that the dry ash desulfurization effect comes from the joint action of both physical and chemical absorption of SO0.8 by the fly ash; while in case of desulfurization with added moisture, the presence of free water is decisive for raising desulfurization efficiency, and Ca/S ratio is the major influencing factor in wet desulfurization. According to experimental results, the dry ash method is least effective, the moistening method ranks the second, whereas the ash slurry wet method is the best, with which a sulfur removal rate of 53%-78% was obtained with a Ca/S ratio of 0.864-1.86, thus demonstrating it to be of middling effectiveness and, therefore has bright engineering application prospects.
- 出版日期2007
- 单位西安交通大学
