摘要
由于高炉瓦斯泥中多种组分均具有燃煤固硫的特性,因此,本研究通过将高炉尘泥混入到水煤浆中进行燃烧,在前期研究的基础上,结合XRD分析,研究了不同燃烧条件下高炉瓦斯泥对水煤浆固硫率的影响规律,以及尘泥中多元固硫体系在燃烧固硫中相互协调作用、热力学行为.结果表明,瓦斯泥添加量为30%,燃烧终温为800℃时,固硫率达到48.31%.主要原因是瓦斯泥多组分促进了耐高温脱硫产物3Ca O3·3Al2O3·Ca SO4的生成,降低了Ca SO4的分解,从而提高了水煤浆的固硫率.研究结果可为具有多元固硫体系的高炉尘泥及其它固废高附加值利用提供一定的技术参数和理论依据,也可为开拓研究新型、高效燃煤固硫剂提供理论基础,具有一定的经济价值和环境意义.
Due to the sulphur fixation characteristics of blast furnace sludge（ BFS） in coal water slurry combustion processes,the mechanism of BFS on coal water slurry desulfurization rate under different combustion conditions and multi-system coordination role in sulfur coal water slurry combustion were studied by X-ray diffraction（ XRD）. Results showed that the desulfurization rate could reach 48.31% with 30% BFS under 800 ℃ temperature,due to the formation of high-temperature desulfurization products 3Ca O3·3Al2O3· Ca SO4 in coal water slurry combustion which could reduce the Ca SO4 decomposition and thereby increase the coal water slurry desulfurization rate. This study provided scientific basis for new sulfur fixation agents with multiple valuable components in solid wastes,and moreover,was helpful in developing effective sulfur retention compound and beneficial to economy and environment.
出处
《环境科学学报》
CAS
CSCD
北大核心
2016年第3期953-959,共7页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.51404003
U1361128)
安徽省科技厅项目(No.KJ2013Z017)~~
关键词
高炉瓦斯泥
固硫
水煤浆
燃烧
blast furnace sludge
sulfur-retention
coal water slurry
combustion
作者简介
高志芳（1978-），女，副教授，E-mail：cancan20071007@163．com；通讯作者（责任作者）
