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高温灰和流动性行为在污水泥和煤炭的共同燃烧

Yunpeng Yu^1,2, Zhiao Yu³, Wei Xu⁴

¹Department of Chemical&Biological Engineering, Monash University, Wellington Road, Clayton, Victoria 3800, Australia.

|April 1, 2024

概括

与煤炭一起共燃污水污泥有助于处理. 灰的组成,特别是二氧化 (SiO2),氧化 (CaO) 和氧化铁 (Fe2O3),显著影响灰的化行为和渣流动性,这对于炉设计至关重要.

科学领域:

环境工程环境工程
材料科学材料科学材料科学
燃烧科学燃烧科学

背景情况:

污水处理产生大量的污泥,需要有效和环保的处理方法.
污水污泥与煤炭的共同燃烧为污泥管理提供了一个经济和环境可行的解决方案.
灰的化特性对于选择合适的联合燃烧技术和炉设计至关重要.

研究的目的:

为了研究共同燃烧的污泥和煤炭混合物的灰融化行为和渣渣流动性.
了解关键化学成分 (SiO2,CaO,Fe2O3) 对灰和流动性能的影响.
为优化共同燃烧条件和设计合适的焚烧炉提供见解.

主要方法:

使用两种污泥和四种煤炭,对灰融化的行为进行实验分析.
热力学方法来研究灰聚变特征.
修改的倾斜平面方法,以评估高温时的渣渣流动性.

主要成果:

污泥中的 (SiO2) 和氧化 (CaO) 增加了灰的化温度;CaO增强了化,而SiO2则充当了溶剂.
铁氧化物 (Fe2O3) 在10-20%的质量分数范围内会影响灰 properties.
CaO和SiO2降低了渣渣流动性,而Fe2O3则促进了这种流动性. 渣渣流速在1.6的基/酸比度达到顶峰,受Fe-Ca和Si-Al相互作用的影响.

结论:

污泥灰的化学成分,特别是SiO2,CaO和Fe2O3的相互作用,决定了灰融化和渣渣流动的行为.
了解这些相互作用对于在联合燃烧过程中管理渣和污垢是关键.
这些发现支持优化联合燃烧过程和设计用于污泥焚烧的高效炉.

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