Acid mist recycling system device

Abstract

The invention relates to electrolytic deposition accessory equipment in the field of chemical technologies, belongs to the technical field of environmental protection, and particularly discloses an acid mist recycling system device which comprises cathode frames, anode frames and an acid mist absorption tower. The cathode frames and the anode frames are arranged in an electro-deposition tank and are fixedly connected with one another by screws, acid mist discharge outlets are formed in the anode frames, draft channels are arranged on the electro-deposition tank, each draft channel is connected with the acid mist discharge outlet in the corresponding anode frame, and generated acid mist flows through the draft channels connected with the acid mist discharge outlets, and flows into the acid mist absorption tower under the effect of a draft fan to be treated by the acid mist absorption tower. The acid mist recycling system device has the advantages that the problem of severe environments due to the fact that acid mist generated by an existing electro-deposition device in an electro-deposition procedure is directly freely discharged is solved; draft equipment performs drafting in a negative-pressure mode, so that resources are saved; problems that a gas collecting hood and the like extract acid mist, liquid formed on the gas collecting hood drops on copper bars or copper rods, copper is corroded and the quality of nickel is affected are solved.

Description

technical field [0001] The invention relates to auxiliary equipment for electrolytic deposition in the technical field of chemical engineering, belongs to the technical field of environmental protection, and specifically relates to an acid mist recovery system device. [0002] Background technique [0003] The principle of electrolytic nickel: [0004] Cathodic nickel is electrolytically deposited from an aqueous solution of pure nickel salt using an insoluble anode. Electrowinning of sulfate solutions usually uses lead anodes, while chloride solutions use stable anodes, such as graphite anodes and titanium anodes. [0005] The anode is electrolytically deposited in pure sulfuric acid solution, and the process is mainly oxygen evolution. [0006] h 2 O-2e=1 / 2O 2 +2H + [0007] When a new pb anode is used for electrolysis, before the oxygen evolution reaction occurs, the dissolution of the pb anode also occurs, but the PbSO 4 It also has a certain solubility in the s...

AI Technical Summary

Problems solved by technology

[0013]In traditional nickel or cobalt electrodeposition devices, oxygen and hydrogen ions are generated due to the loss of electrons at the anode H2O, Oxygen escapes, hydrogen ions are gradually enriched, and nickel ions in the solution get electrons on the cathode, and electrolytic nickel is precipitated. During the process of electrolytic nickel or cobalt deposition, hydrogen ions in the anode area are enriched. This process is During the acid-making reaction process, the oxygen and steam generated by the anode overflow from the liquid, and the surface of the bubbles will bring a small amount of acid into the air under the action of tension to form acid mist, so that the generated acid mist is directly discharged into the operating space without organization, seriously Affected the production environment

At the same time, it is also very corrosive to steel structure workshops and equipment, which reduces the service life of workshops and equipment, and also affects the health of workers.

[0014] At present, there are also acid mist recovery devices developed. For example, in the application number 200720187328.4, the nickel electrowinning acid mist absorption device used is a gas collecting hood Extract the acid mist. In this case, it is necessary to install a gas collecting hood on the upper end of each anode. In addition, it is necessary to add an exhaust pipe to discharge the acid mist. In this way, during the electrowinning process, the acid mist produced It will condense, and then the formed droplets will drip onto the copper bars or copper rods in the electrolysis device, which will corrode the copper bars and affect the quality of nickel products. Moreover, adding a gas collecting hood to the anode makes it difficult for maintenance personnel to enter For maintenance inside, you need to lift the cover before you can operate, which will definitely increase the labor intensity

Images