QI Hui,ZHAO Yongchun,YAO Bin,et al.Influence factors of removing water soluble sodium in Zhundong coal by water washing[J].Thermal Power Generation,2015,(09):14-18.
水洗脱除准东煤中水溶性钠的影响因素分析
- Title:
- Influence factors of removing water soluble sodium in Zhundong coal by water washing
- 分类号:
- TK16
- 文献标志码:
- A
- 摘要:
- 为确定水洗脱除准东煤中水溶性钠的最佳工艺条件,选择五彩湾煤、天池能源煤、乌东煤3种准东煤,通过逐级萃取分离法对其中钠的赋存形态和质量分数进行研究,并以五彩湾煤为例采用正交实验和极差分析方法,研究水洗温度、脱除时间、煤粉粒径、搅拌转速等对水溶性钠脱除的影响。结果表明:3种煤总钠质量分数分别为2.329 5,2.235 9,0.598 0 mg/g,煤种钠主要以水溶性钠形式存在; 各因素对水溶性钠脱除影响的强弱顺序为水洗温度>脱除时间>搅拌转速>煤粉粒径; 在适当的水洗温度下延长脱除时间、加快搅拌转速、减小煤粉粒径,水溶性钠脱除效果明显提高; 实验确定的最佳脱除水溶性钠工况条件为水洗温度70 ℃,脱除时间24 h,搅拌转速200 r/min,煤粉粒径在38.5~54.0 μm之间。
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备注/Memo
祁慧(1991—),男,硕士研究生,主要研究方向为准东煤燃烧技术。