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关于CaO/Na2O对煤灰渣在训练流气化条件下的流动行为的影响的调查
Chunlei Gao1,2, Linmin Zhang3, Wei Li4
1Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, China.
ACS omega
|January 26, 2026
概括
优化煤灰中的CaO/Na2O比率是引流流气化中稳定的渣渣流量的关键. 调整该比率会改变矿物相,显著影响灰融温度和渣粘度,以提高运行稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 热力学是一种热力学.
背景情况:
- 污泥流动行为对于流动气化中的运行稳定性至关重要.
- 东煤灰具有高含量,影响其热化学性质.
- 了解渣渣的行为对于高效的煤炭气化工艺至关重要.
研究的目的:
- 为了研究CaO/Na2O质量比对合成Zhundong煤灰的流动行为的影响.
- 探讨这种比率在气化条件下对灰可融合性和渣渣粘度的影响.
- 为优化煤炭混合提供一个理论基础,以获得稳定的渣渣流量.
主要方法:
- 合成煤灰的制备与不同的CaO/Na2O质量比,基于Zhundong煤灰的组成.
- 利用FactSage的热力学计算来探索CaO/Na2O比率的影响.
- 分析了结晶相的变化,灰融温度 (AFT) 和渣渣粘度-温度特征.
主要成果:
- 增加的CaO/Na2O比率将晶相从nepheline转变为anorthite,影响灰的可聚变性和渣粘度.
- 灰融温度 (AFT) 随着较高的CaO/Na2O比率而增加,特别是在从nepheline转向anorthite主导时.
- 渣渣粘度显示出液体温度以下的非单调行为 (下降然后增加) 和由于结构变化 (NBO增加) 导致液体温度以上的单调下降.
结论:
- /Na2O比率显著控制了煤灰渣的矿物质转化和随后的流动行为.
- 优化CaO/Na2O比率对于管理灰融化温度和渣粘度至关重要.
- 这些发现为混合高性煤提供了理论基础,以确保稳定的渣渣流量并提高气化效率.
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