A kind of hypophosphite treatment device and method for preventing iodine loss

Abstract

The invention discloses a hypophosphite treatment device for preventing iodine loss 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 reactor assembly includes a first main reactor and a second main reactor, and the water inlet pipe entering the reactor assembly is divided into a first passage and a second passage; the first main reactor and the second main reactor have the same structure, and both include interception Net, orifice plate, at least one activated carbon column and shell for adsorbing iodine element; the bottom of the shell 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 and a reaction area by the intercepting net and the orifice plate and outlet area. The invention periodically changes the opening and closing of the first passage and the second passage, so that only one passage is opened, so as to avoid loss and loss caused by the separation of the iodine element from the activated carbon column during the migration process of the water flow.

Description

technical field

[0001] The invention belongs to the field of complex heavy metal wastewater treatment, and in particular relates to a hypophosphite treatment device and a method for preventing iodine loss. 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 electroless plat...

Images