Method for treating waste water containing low concentration ammonium chloride

• Main Authors: LANTING LOU, ZONGHUA ZHANG, YONGGUO WU
• Format: Patent
• Language: Chinese; English
• Published: 28.04.2004
• Edition: 7
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The treating process of waste water containing low concentration ammonium chloride includes the following steps: separating water and recovering, reverse penetrating film concentrating treatment of waste water containing ammonium chloride and reusing of purified water, concentrating water via evaporation to recover ammonium chloride and returning condensated water to membrane system for retreatment. The present invention has low power consumption, low production cost and technological advance, and can produce purified water reaching industrial pure water indexes and recover ammonium chloride completely. 本发明公开一种含低浓度氯化铵废水的处理方法，由以下步骤组成：(1)水的分质回收，(2)氯化铵废水的反渗透膜浓缩处理，纯化水回用，(3)浓缩水多效蒸发回收氯化铵，冷凝水返回膜处理系统再处理。本发明的方法具有能耗低、生产成本低，工艺先进的特点，处理后的净化水能够达到工艺纯水指标，氯化铵也能实现彻底回收。