摘要
为节约用水,一些电厂将循环水排污水处理后用作电厂化学除盐系统的补充水。从运行情况看,循环水排污水混凝澄清处理效果不佳。为此,从阻垢剂和混凝剂的阻垢、混凝机理着手,分析了磷系阻垢剂对混凝效果的影响,在进行大量试验的基础上提出了加入NaOH控制循环水排污水pH值的方案(混凝剂为聚铁,助凝剂为聚丙烯酰胺),以利于形成CaCO3和Mg(OH)2沉淀,减轻阻垢剂分散作用,增加水的浊度和矾花密度,改善混凝澄清效果。该方案经在国华定州电厂二期应用,取得了良好的混凝效果。
In order to Save utilized water, the blowdown water from circulating water system in some power plants is used as make - up water for chemical desalting water in said power plants after treatment. Seeing from deeds in operation, the effect of treatment by coagulation and clarification for said blowdown water isn＇t good. For this,starting with the antiscale and coagulating mechanism of said antiscalant and coagulant,the influence of phospherous antiscalant upon the coagulation effect has been analysed. On the basis of a large amount of carried out tests,a scheme of controlling the pH value of blowdown water through adding NaOH has been put forward,the coagulant is polyiron,the coagulant aid being polyacrylamide, so as to be beneficial to form the precipitation of CaCO3 and Mg（OH）2, reducing the dispersive effect of said antiscalant,increasing the turbidity of water and the density of vitriol flowers, improving the effect of coagulation and clarification. Through application of said scheme into second- phase project of Guohua Dingzhou Power Plant, good effectiveness of coagulation has been achieved.
出处
《热力发电》
CAS
北大核心
2010年第1期95-99,共5页
Thermal Power Generation
关键词
循环水
磷系阻垢剂
水处理
混凝
澄清
circulating water
phospherous antiscalant
water treatment
coagulation
clarification
