固体防垢块中的HEDP粉末的制备

用固体防垢块防止油井结垢,有效期长。为筛选制作这种固体块所需的材料,评价了7种膦酸盐防垢剂,发现羟基乙叉二瞵酸(HEDP)对碳酸钙垢具有较高的防止能力,且热稳定性好。将HEDP防垢剂水溶液由一定浓度的NaOH中和后,经烘干、粉碎,可制得水溶性好、防垢率高的HEDP钠盐粉末;另一种方法是在HEDP水溶液中按n(Ca(OH)₂)/n(HEDP)=1.75的比例加入Ca(OH)₂,经过滤、烘干后,可得到能在水中缓慢溶解的HEDP粉末,其主要成分是Ca₂HEDP。上述两种HEDP粉末同聚乙烯混炼,可制备出固体防垢块。     

Fast ZPinch, A New Approach for Promising Fusion Energy

The basic concept of fast Zpinch, and late progress in fast Zpinch plasma research as HEDP and ICF research, especially as an approach for high yield lowcost fusion energy research, are summarized in this paper. The possible technical challenges of fast Zpinchdriven ICF as fusion energy and it application prospect are discussed.