从半焦炭中清洁地制备成型焦炭,采用碳化凝固工艺
Zhengqi Guo1, Xianqing Xu1, Deqing Zhu1
1School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China.
这项研究从低级煤半焦炭中开发了高质量的成型焦炭,显著减少了SO2,NOx和颗粒物排放,以获得更清洁的能源. 优化的工艺提高了热效率和环境效益.
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.
- 环境科学 环境科学
背景情况:
- 低级煤炭燃烧的热效率低,环境污染严重.
- 传统的焦炭生产是能源密集型的,依赖于高级煤炭.
研究的目的:
- 从低级煤炭开发一个更清洁,更高效的能源.
- 为了优化生产高质量的成型焦炭的过程,使用低级煤半焦炭.
主要方法:
- 通过碳化巩固低级煤半焦的成型焦炭制剂.
- 优化化和碳化巩固参数 (压力,湿度,粘合剂,二氧化碳度).
- 分析形成的焦炭的物理强度,燃烧特性和排放概况.
主要成果:
- 确定了最佳参数:93.63 MPa的压,16%的湿度,10%的Ca(OH) 2粘合剂,30%的CO2在20°C,60分钟的碳化时间.
- 产生的成型焦炭具有高压力 (1256.2 N/a),重新干燥 (286.2 N/a) 和降落 (10.6 个数/a) 的强度.
- 燃烧显示点火/燃烧温度略高,但与煤相比,SO2,NOx和颗粒物排放明显较低.
- 添加Ca(OH) 2有效地减少了通过固定硫的SO2排放.
结论:
- 来自低级煤半焦的成型焦炭提供了一个可行的清洁能源替代品.
- 优化的碳化巩固方法产生了高质量的成型焦炭,改善了环境性能.
- 这项技术解决了低级煤炭利用的挑战,提高了热效率并减少了污染.
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