盐酸-次氯酸钙氧化法去除贫泥磷中的黄磷

Removal of Yellow Phosphorus from Poor Phosphorus Sludge by Hydrochloric Acid-Calcium Hypochlorite Oxidation Process

分别采用次氯酸钙单一体系和盐酸-次氯酸钙复合体系对贫泥磷中的黄磷进行氧化处理,重点考察了盐酸浓度、次氯酸钙加入量、反应温度和反应时间等因素对贫泥磷中黄磷去除率的影响。实验结果表明:与单一次氯酸钙体系相比,盐酸的加入有效地破除了贫泥磷中的胶质结构,盐酸-次氯酸钙复合体系能有效地去除贫泥磷中的黄磷;在反应温度为60℃、盐酸浓度为2.4 mol/L、破胶反应时间为30 min、次氯酸钙加入量为250 g/L、氧化反应时间为3 h的最佳条件下,黄磷的去除率达到99.6%以上。

Yellow phosphorus in poor phosphorus sludge was oxidized in calcium hypochlorite single system and hydrochloric acid-calcium hypochlorite composite system respectively.The factors affecting the yellow phosphorus removal rate were investigated.The experimental results show that：Comparing with calcium hypochlorite single system,yellow phosphorus can be effectively removed from the poor phosphorus sludge in hydrochloric acid-calcium hypochlorite composite system,because the added hydrochloric acid can break effectively the colloid structure in the poor phosphorus sludge;Under the optimum conditions of reaction temperature 60 ℃,hydrochloric acid concentration 2.4 mol/L,colloid breaking reaction time 30 min,calcium hypochlorite dosage 250 g/L and oxidation time 3 h,the removal rate of yellow phosphorus is above 99.6%.