Acid-mist purification device for cold-rolled steel strip

Abstract

The invention discloses an acid-mist purification device for a cold-rolled steel strip. The acid-mist purification device comprises a head cover and a tower body, wherein the head cover is welded at the top of a discharge outlet; the bottom of the discharge outlet is fixedly connected with the top of the tower body; an activated carbon adsorption layer is arranged at the upper part of the inner side of the tower body; an SDG adsorbent layer is arranged in the position, on the inner side of the tower body, below the activated carbon adsorption layer; another activated carbon adsorption layer is arranged below the SDG adsorbent layer; and a swirl plate tower is arranged below the activated carbon adsorption layer. As a combined structure of a truncated-cone-shaped air-inlet pipe orifice, an infusion tube rack and nozzles is adopted, acid mist and harmful gases fully react with a chemical solution in a chemical alkali liquor pond to be neutralized, particularly, the truncated-cone-shaped air-inlet pipe orifice enables such harmful gases as acid mist to enter the chemical alkali liquor pond to be filtered into small bubbles through round holes of the air-inlet pipe orifice, and accordingly, the reaction is more sufficient.

Description

technical field [0001] The invention relates to the technical field of cold-rolled steel strip acid mist purification, in particular to an acid mist purification device for cold-rolled strip steel. Background technique [0002] Acid mist usually refers to misty acid substances. The particles of acid mist in the air are very small, smaller than those of water mist, and higher in humidity than smoke, with a particle size of 0.1-10 μm, which is a substance between smoke and water mist, and has strong corrosion sex. These include acid mist formed by inorganic acids such as sulfuric acid, nitric acid, and hydrochloric acid, and organic acids such as formic acid, acetic acid, and propionic acid. In the acid process, such as acid production, pickling, electroplating, electrolysis, acid battery charging, etc. In addition, in the process of some scientific research, different acids are also used. Because these acid-using processes often use a mixture of various acids, the exhaust...

AI Technical Summary

Problems solved by technology

[0003] However, when the existing acid mist purification device is dealing with harmful gases such as acid mist produced in cold-rolled strip steel and other metal processing processes, because of its simple structure, it can only effectively deal with one or two kinds of harmful gases. It causes inefficiency in the treatment of harmful gases such as acid mist, and it is time-consuming and labor-intensive when replacing materials such as chemical agents and activated carbon to deal with harmful gases such as acid mist. At the same time, there are also disadvantages such as the discharge of acid mist and harmful gases after treatment is still not up to standard.

Images