Influence factors of removing water soluble sodium in Zhundong coal by water washing

QI Hui; ZHAO Yongchun; YAO Bin; ZHANG Junying; ZHENG Chuguang

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Influence factors of removing water soluble sodium in Zhundong coal by water washing

Thermal Power Generation Vol. 44, Issue 9, Pages: 14-18(2015)

更新时间：2025-09-28

- Influence factors of removing water soluble sodium in Zhundong coal by water washing
- 作者机构：
  
  华中科技大学煤燃烧国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ533
- Published：2015
- 稿件说明：
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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, 44(9): 14-18.
DOI：

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, 44(9): 14-18. DOI：

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 0mg/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24h

搅拌转速200r/min

煤粉粒径在38.5~54.0μm之间。

Abstract

To ascertain the optimal process condition for removing water solubility sodium in Zhundong coal

three kinds of Zhundong coals

WCW

TCNY and WD

were selected as the samples to investigate the occurrence mode and mass ratio of sodium

by extraction separation step by step.Moreover

taking WCW coal as the research object

the orthogonal experiment and extreme difference analysis were carried out to investigate the effects of such parameters as temperature

time

coal particle size and agitator speed on the water soluble sodium's removal.The results indicate that

the total mass ratio of sodium in WCW

TCNY and WD coal was 2.329 5mg/g

2.235 9mg/g and 0.598 0mg/g

respectively.The sodium mainly exist in water soluble form.The order of the factors influencing water-soluble sodium's removal is:temperature

time

coal particle size

agitator speed(from strong to weak).At proper temperature

prolonging the reaction time

speeding up the agitator and reducing the coal particle size would enhance the removal rate of water soluble sodium significantely.The best working conditions of removing water-soluble sodium in the experiment is

at 70 ℃

with reaction time of 24 h

agitator speed of 200r/min and coal particle size of 38.5μm to 54μm.

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