Treatment of Acid-Containing Exhaust Gas
There are two methods for treating acid-containing exhaust gas. Firstly, during the construction of workshops, a ventilation structure with natural airflow can be designed to expel harmful gases through air convection. Secondly, an acid tank suction and exhaust ventilation facility can be employed to directly draw acid mist out of the workshop through suction ports at the tank edge. The acid mist is then removed by alkaline spray in a waste acid treatment tower before being discharged into the atmosphere. This is a commonly adopted method by manufacturers both domestically and internationally.
Treatment of Zinc Dust
During the galvanizing process of workpieces in a zinc bath, a large amount of zinc vapor and ammonium chloride vapor are generated due to the evaporation of flux on the workpiece surface. The concentration of zinc dust (zinc chloride) in these gases is 1015g/m³, and the concentration of lead dust is 0.120.15mg/m³. Currently, the method used for treating these dusty gases is to install suction and exhaust devices at the tank edge to draw out harmful dusty air, which is then filtered through a baghouse dust collector (3). This dust collector can capture dust particles larger than 5 micrometers with a capture rate of over 99%, fully meeting environmental standards. Additionally, pure zinc ash can be recovered, resulting in greater economic benefits.
