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煤气化煤炭的共同燃烧特点飞灰和煤炭由循环流化床预热

Jicheng Hui¹, Jiangong Lin², Shujun Zhu³

¹North China Electric Power University, Beijing 102206 China; State Key Laboratory of Coal Conversion, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190 China.

Waste management (New York, N.Y.)

|February 9, 2025

概括

通过预热联合燃烧煤气化飞灰 (CGFA) 和煤炭 (CG),提高了燃烧效率并减少了废物. 通过25%的煤混合物获得最佳效果,增强了煤炭的性能并最大限度地减少了有害排放.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

煤气化飞灰 (CGFA) 和煤炭 (CG) 的不当处置带来了重大的环境风险.
预热燃烧是一种有效的固体燃料利用方法.
CGFA和CG具有互补的特性,适合协同燃烧.

研究的目的:

调查CGFA和CG混合物的预热修饰和共燃特性.
为了确定最佳的混合比,提高燃烧和减少排放.
分析活性炭的物理化学结构演变.

主要方法:

采用预热技术,在各种混合比率下共同燃烧CGFA和CG.
使用颗粒大小分析仪,扫描电子显微镜,N2吸附-溶解和拉曼光谱分析活性炭的分析.
燃烧效率和排放 (NO,N2O) 的评估.

主要成果:

在25%-50%的CG混合比率下实现稳定的预热燃烧.
添加CGFA改善了混合燃料的表面结构.
煤炭的特定表面积和化学反应性显著增加,最高活性为25%CG.
在CGFA固定碳和CG挥发物之间观察到协同效应.
在25%-50%的CG混合物中,燃烧效率得到了提高.
25%CG的最佳混合比率导致NO和N2O排放分别为121 mg/cm3和14 mg/cm3.

结论:

同时燃烧CGFA和CG与预热修改是一种可行的废物利用策略.
混合率为25%的CG,在燃烧活性,燃烧效率和排放控制方面提供最佳性能.
该研究表明,在改善燃烧过程的同时,在固体废物管理方面采取了协同方法.

关键词:

共同燃烧是一种共同燃烧.煤炭集团是一个团伙.煤气化煤灰飞行灰的使用方法预热预热预热

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