热力发电Issue(9)：14-18,5.DOI:10.3969/j.issn.1002-3364.2015.09.014
水洗脱除准东煤中水溶性钠的影响因素分析
Influence factors of removing water soluble sodium in Zhundong coal by water washing
摘要
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 5 mg/g,2.235 9 mg/g and 0.598 0 mg/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 reac-tion time,speeding up the agitator and reducing the coal particle size would enhance the removal rate of wa-ter soluble sodium significantely.The best working conditions of removing water-soluble sodium in the ex-periment is,at 70 ℃,with reaction time of 24 h,agitator speed of 200 r/min and coal particle size of 38.5μm to 54 μm.关键词
准东煤/水洗/水溶性钠/赋存形态/逐级萃取分离/脱除率/影响因素Key words
Zhundong coal/water washing/water-soluble sodium/occurrence mode/fractional extraction/re-moval efficiency/influence factor分类
能源科技引用本文复制引用
祁慧,赵永椿,姚斌,张军营,郑楚光..水洗脱除准东煤中水溶性钠的影响因素分析[J].热力发电,2015,(9):14-18,5.基金项目
国家自然科学基金项目(51376074) （51376074）
中央高校基本科研业务费专项资金项目(2013QN087) （2013QN087）
