摘要
为综合利用气田卤水,最有效的方法是卤水制盐。但川中气田卤水含有较高质量浓度的钙镁离子。为防止制盐工艺中蒸发浓缩设备结垢,一般是预先将其沉淀除去。由于钙镁沉淀的颗粒太细、沉降时间较长,已严重影响了制盐的生产效率,故需要采用沉淀絮凝法来解决,关键是恰当地选择及使用性能优良的絮凝剂。为此,以沉降时间和水体浊度为指标,通过模拟卤水,研究了絮凝剂对其钙镁沉淀的絮凝性能。结果表明,阴离子聚丙烯酰胺在25℃、最佳用量50mg/L及搅拌速度500r/min时,沉淀的沉降时间最短,水体浊度最低。
Extracting salt is an effective method to comprehensively utilize brine from gas field,but high concentration of Ca2+ and Mg2+ can bring about inorganic scale,which can be removed by precipitation.In this course,the flocculent plays an important role.In this paper,the effect of flocculent on the properties of the calcium magnesium precipitation is studied.The result shows a anionic polyacrylamide(APAM) can be selected as the flocculent for the precipitation with the shortest settlement time and the lowest water turbidity under the condition of the temperature of 25℃ and the stirring speed of 500r/min and the flocculent amount of 50mg/L.
出处
《西南石油大学学报(自然科学版)》
CAS
CSCD
北大核心
2009年第5期147-149,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
气田
沉淀
絮凝
卤水
絮凝剂
gas-field
precipitation
flocculation
bittern
flocculent