Acid fog exhaust gas is introduced by the wind tube into the purifying tower, after filling layer, exhaust gas and sodium hydroxide absorption liquid are two phase full contact absorption and reaction, acid fog exhaust gas is purified after, then after dehydration of the fog plate after removal of the fog from the fan into the atmosphere. Acid fog exhaust gas is introduced by the wind tube into the purifying tower, after filling layer, exhaust gas and sodium hydroxide absorption liquid are two phase full contact absorption and Lɔ̈ɔ̈m ye cɔl absorption ye cɔl tower bottom, ye cɔl pump pressure, ye cɔl tower top, ye cɔl tower bottom cycle. Acid mist exhaust after purification meets the local emission standards of Guangdong province, below the national emission standards. Acid mist exhaust after purification meets the local emission standards of Guangdong province, below the national emission standards. Acid mist exhaust after purification meets the local emission standards of Guangdong province, below the national emission standards.