A kind of treatment device and method of hypophosphite in electroless nickel plating waste liquid

Abstract

The invention discloses a device for treating hypophosphite in chemical nickel-plating waste liquid and a method thereof. The device comprises an ultrafiltration treatment unit, a dosing unit and a reaction unit which are connected in sequence through pipelines; the reaction unit includes a plurality of connected main reactions The bottom of the reaction chamber is provided with a water inlet, and the top is provided with a water outlet; the inner cavity is axially divided into a water inlet area, a reaction area and a water outlet area by the first sealing plate and the second sealing plate; The two sealing plates are respectively provided with a number of through first holes and second holes at the same position, and an activated carbon column is detachably fixed between the first holes and the second holes at the same position; the upper head and the first sealing plate are disassembled After the activated carbon column can be taken out. In the present invention, by regularly placing the activated carbon column upside down, the iodine element can be prevented from being separated from the activated carbon column during the migration process of the water flow, thereby causing loss and loss. The device of the invention is simple in structure, easy to maintain, and has a good application prospect.

Description

technical field

[0001] The invention belongs to the field of complex heavy metal wastewater treatment, and in particular relates to a device and a method for treating hypophosphite in chemical nickel plating waste liquid. Background technique

[0002] Electroless nickel plating solution is mainly composed of nickel salt, complexing agent, reducing agent and additives. Nickel salt is the main salt of the plating solution. Nickel sulfate is generally used, followed by nickel chloride, and nickel acetate and nickel carbonate. At the same time, it can prevent the precipitation of hydroxide and phosphite; sodium hypophosphite is generally used as the reducing agent, and its function is to provide active hydrogen atoms through catalytic dehydrogenation, and reduce nickel ions to metallic nickel.

[0003] The huge electroless plating industry not only promotes the rapid development of modern industry, but also brings serious environmental pollution problems. Periodically scrapped ...

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