Ammonia fog collecting and treating system for electrolytic plant

Abstract

The invention belongs to the technical field of waste gas treatment, and relates to an ammonia fog collecting and treating system for an electrolytic plant. The system comprises an electrolytic area,inter-cell air suction pipes, branch air suction pipes, a main air suction pipe, an ammonia absorbing tower, a fan, a chimney, and a laminating device; the inter-cell air suction pipes are arranged atthe positions, above the outer side walls of electrolytic cell sets on the two ends and above adjacent side walls of the adjacent electrolytic cell sets, in the electrolytic area, the inter-cell airsuction pipes, the branch air suction pipes, the main air suction pipe, then ammonia absorbing tower, the fan and the chimney are sequentially connected, the laminating device covers the cell faces ofthe electrolytic cell sets, the two sides of the laminating device are arranged above the inter-cell air absorbing pipe, and an air suction opening is formed in the side wall of the inter-cell air absorbing pipe. The system is used for effectively solving the problem that due to the too large electrolytic cell span of the electrolytic plant, waste gas collecting and treating are difficult, the ammonia fog collecting and treating efficiency is high, the effect is good, no wastes are discharged, the system is environment-friendly and energy-saving, resource use is reasonable, and the system isgood in economic benefit.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment and relates to an ammonia mist collection and treatment system in an electrolysis workshop. Background technique [0002] The production of electrolytic manganese metal is mainly to electrolyze the neutral aqueous solution of manganese sulfate-ammonium sulfate, which is a complex electrochemical reaction; during the electrolysis process, while manganese metal is precipitated on the cathode plate, ammonia, oxygen, water vapor and a small amount will be released. The mixed gas of hydrogen gas forms a certain height of ammonia mist above the tank surface, resulting in obvious ammonia smell in the production workshop, and the pungent ammonia smell seriously affects the health of workers. In order to improve the operating environment of the workshop and control the odor within the allowable range of occupational health, it is necessary to install a suitable gas collection device, so that al...

AI Technical Summary

Problems solved by technology

Although there are no problems in the above three schemes in theory, there are many defects in the implementation process, specifically: (1) when using a movable closed gas collection hood, because the gas collection hood has a large span and needs to be constantly moved, And its material is required to be a corrosion-resistant non-metallic material, which greatly limits the material selection of the mobile air collecting hood. The most suitable material is glass fiber reinforced plastics, but its strength is difficult to meet the requirements; in addition, for safety reasons, mobile Metal materials cannot be used for the guide rail of the gas collecting hood, and there are no other suitable materials available for use

(2) When adopting the method of sealing the space on the tank surface and ventilating as a whole, it is not only costly to close the workshop as a whole, but also the operating cost in the future is also high; more importantly, ammonia and hydrogen will be released during the electrolysis process Explosive gases may be released, and other dangerous gases may be released; after the workshop is closed as a whole, all gases are discharged through the gas collection port, making it difficult for the environment in the electrolysis area near the gas collection port to meet the standard

(3) When installing air ducts on the surface of the tank and adopting blowing and suction ventilation methods, although the purpose of collecting ammonia mist without changing the operating habits of workers can be achieved, the operating costs of the entire system are relatively high, and continuous blowing Gas operations can affect the health of workers

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