Method and equipment for recovering heavy metal in electroplating wastewater

A technology for electroplating wastewater and heavy metals, applied in metallurgical wastewater treatment, chemical instruments and methods, electrolysis process, etc., can solve the problems of staying in the laboratory stage or small test, pilot test stage, waste, not easy to form pieces, etc., to achieve reduction Concentration polarization, reduction of investment and management, and effect of effluent water quality assurance
CN103243348BActive Publication Date: 2014-09-17GUANGDONG XINDAYU ENVIRONMENTAL PROTECTION TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG XINDAYU ENVIRONMENTAL PROTECTION TECH CO LTD
Publication Date
2014-09-17

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Abstract

The invention discloses a method and equipment for recovering heavy metal in electroplating wastewater, belonging to the technical field of electroplating wastewater disposal. The method comprises the following steps of: (1) performing ion exchange resin treatment on the electroplating wastewater, and enabling heavy metal ions in the electroplating wastewater to be adsorbed onto the ion exchange ions; (2) eluting the heavy metal ions adsorbed on the ion exchange ions through a regenerant to obtain a regenerated solution; and (3) electrolyzing the regeneration solution by adopting a rotational flow electrolysis technology, and separating out heavy metal on a negative electrode. The equipment comprises a resin exchange treatment unit and an electrolysis recovery treatment unit, wherein the electrolysis recovery treatment unit consists of a rotational flow electrolyzer and a reflux device for controlling the flow velocity of liquid. The concentration polarization can be avoided by introducing the rotational flow electrolysis technology, the simple substance ion finally electrolyzed is smoother and has more selectivity, the low-concentration regenerated solution can be electrolyzed, the electrolysis effect can be ensured, and the exchange resin regenerated solution treated by adopting an electrolysis method can be applied into practical engineering.
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Description

technical field

[0001] The invention relates to the technical field of electroplating wastewater treatment, in particular to a method and equipment for recovering heavy metals in electroplating wastewater. Background technique

[0002] The wastewater in the electroplating industry has the characteristics of large water volume, complex composition, serious environmental pollution, and many precious metals and heavy metals. At present, the domestic treatment of this type of wastewater generally adopts general physical and chemical treatment methods, and at the same time, it uses non-standard reflux to the accident pool for further treatment. Discharge after meeting environmental protection requirements. However, this method has the following defects: First, a large amount of chemicals need to be added in the process of physical and chemical treatment, thereby generating a large amount of physical and chemical sludge, which causes secondary pollution to the environment; second,...

Claims

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