摘要
分析了煤泥水絮凝沉降的影响因素,发现煤泥水的硬度对絮凝剂絮凝效果有很大影响,高含量的Mg2+,Ca2+对于增强煤泥水沉降效果,降低生产成本,避免过量凝聚剂带来的沉淀物不密实等问题具有重要作用。通过分析絮凝剂溶解规律和熟化规律,阐述了絮凝剂溶解液的制备机理,说明絮凝剂撒放厚度越大,溶解时间越长,絮凝剂溶解液制备装置药剂分散厚度应不大于3 mm;随着煤泥水沉降时间的增加,煤泥水透光率逐渐升高,絮凝剂溶解温度不宜超过50℃,一般控制在30～50℃为宜。最后得出了絮凝剂制备装置流程,说明装置频率小于600 Hz时,絮凝剂结块现象基本不会出现;当频率不小于900 Hz时,絮凝剂会出现一些小块。为保证设备稳定、安全运行,最终选定干粉絮凝剂给料频率为600 Hz。
The hardness of slime water has considerable influence over flocculation. High Ca2＋ and Mg2＋ content could perfect setting effect, decrease production cost, get rid of large consumption of coagulant which once led to loose precipitate. The preparation mechanism of flocculant solution is introduced by analysing its dissolving and curing rule. The thicker additive amount of flocculant need more dissolving time, so the better thickness isn＇t more than 3 mm. With the extension of time, the light transmittance gradually increase. The dissolving temperature shouldn＇t be higher than 50 ℃, the most suitable temperature ranges from 30℃ to 50℃. If the frequency of equipment is less than 600 Hz, the precipitate basically doesn＇t appear, the frequency is not less or equal 900 Hz, there is little precipitate. Considering the stability and safety, the frequency of flocculant feeding machine is set to 600 Hz.
出处
《洁净煤技术》
CAS
2012年第5期10-12,共3页
Clean Coal Technology
关键词
絮凝剂
溶解液
煤泥水
溶解
熟化
透光率
flocculant
solution
slime water
dissolving
curing
light transmittance
