Acid mist waste gas treatment system for metallurgy

Abstract

The invention discloses an acid mist waste gas treatment system for metallurgy. In the present invention, high-temperature acid mist generated by acid pickling treatment of metal in an acid pickling tank is firstly sprayed by a spray head, so that dust particles in the acid mist are removed; then the high-temperature acid mist is cooled through a fin type heat exchanger and adsorption treatment, dust removal treatment and neutralization treatment are carried out subsequently through a plurality of filler layers in sequence, and thereby the toxic substances in the acid mist are repeatedly treated for multiple times; finally, the treated air is cooled through the fin type heat exchanger, and then is discharged into the atmosphere after qualified; besides, wastewater generated by acid mist treatment is subjected to neutralization treatment, cooling treatment and precipitation and then is continuously used; the acid mist waste gas treatment system for metallurgy can treat acid mist to meetthe discharge standard, the temperature of discharged air is low, and the environment cannot be affected; meanwhile, generated waste water can be repeatedly utilized, so that the cost of enterprisescan be reduced, water resources can be saved, and the acid mist waste gas treatment system for metallurgy has good practicability.

Description

technical field [0001] The invention relates to the related field of waste gas treatment, in particular to an acid mist waste gas treatment system for metallurgy. Background technique [0002] Exhaust gas pollution is the biggest problem encountered in the current atmospheric environmental protection. With the development of industry and economy, more and more exhaust gas is emitted, and the problem of air pollution is becoming more and more serious. On the other hand, due to different production processes and raw materials, the components and concentrations of exhaust gases emitted by various industries are also different. Some exhaust gases are also acidic and relatively humid, which is what we often call acid mist. In many industries, metallurgical The industry is the industry that produces the most acid mist. [0003] During the metal smelting process, the metal will be pickled through the pickling tank. During the pickling process of the high-temperature metal through ...

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Problems solved by technology

[0003] During the metal smelting process, the metal will be pickled through the pickling tank. During the pickling process of the high-temperature metal through the pickling solution in the pickling tank, more acid mist will be generated. Now metallurgical pickling of metal The gas generated in the process is usually treated by swirling water washing and spraying method combined with lye absorption, but in the process of acid mist treatment, it is impossible to cool down the high-temperature acid mist, resulting in high temperature of the discharged air, which is harmful to The environment causes certain high-temperature pollution, and at the same time, the high-temperature and acidic wastewater generated by spraying acid mist is neutralized with lye and directly discharged to the sewage plant, resulting in a waste of water resources

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