高校化学工程学报Issue(3)：542-548,7.DOI:10.3969/j.issn.1003-9015.2014.03.017
60℃静态时碳酸钙析晶污垢初始阶段生长机理
Mechanism of Initial Crystallization Fouling of Calcium Carbonate under Static Conditions at 60℃
摘要
Abstract
CaCO3 from CaCl2-Na2CO3 solution was precipitated at different salt concentrations and pH on copper, brass, stainless steel 304 and 316 coupons under static reaction conditions. The scaling weight and morphology were studied by weight balance and SEM. The results show that higher salt concentration, pH and surface energy can promote nuclei formation. Stronger formation dynamics promotes thin and long columnar or acicular crystal formation and increases crystal growing rate, and higher formation energy reduces system energy and results in the change of other polymorphs into calcite. Scaling growth process can be divided into three stages: prophase (surface reaction mechanism); medium-term (surface reaction and particle adhesion contention period) and late stage (particle adhesion mechanism). The prophase and medium-term are the induction period, and the fouling resistance is negative with no flow resistance. The late stage is the crystal growing period.关键词
CaCO 3析晶污垢/静态实验/诱导期/初始阶段Key words
CaCO3 crystallization fouling/static experiment/induction period/initial stage分类
生物科学引用本文复制引用
盛健,张华,赵萍,史雪菲..60℃静态时碳酸钙析晶污垢初始阶段生长机理[J].高校化学工程学报,2014,(3):542-548,7.基金项目
上海市研究生创新基金项目(JWCXSL1101)；上海市重点学科建设项目(S30503)。 （JWCXSL1101）
