There is no packing or tray in the tower, but the absorption tower is provided with nozzles. The liquid enters from the top of the tower and is sprayed into mist or raindrop through the nozzle. The gas enters from the lower part of the tower and is in close contact with the mist or raindrop-like liquid for mass transfer. To allow the readily soluble components of the gas to be absorbed. The structure is simple, not easy to be blocked, the resistance is small, and the operation and maintenance are convenient. Working principle: using alkali liquor or acid liquor as absorbent, the absorbent is added into the circulating water tank of the spray tower, and then sprayed out through the high-pressure nozzle of the spray tower, so that the absorbent can reach the atomized state, thus increasing the contact surface area between the absorbent and the acid-reduced exhaust gas, slowly flowing through the filled packing layer, and then contacting with the incoming acid-alkali exhaust gas to cause neutralization reaction, so that the exhaust gas can be purified and discharged up to meet the standard. Scope of application: It can effectively remove hydrogen chloride gas, hydrogen fluoride gas, ammonia gas, sulfuric acid mist, chromic acid mist, hydrogen cyanide gas, alkali vapor, hydrogen sulfide gas, formalin and other water-soluble gases. Equipment advantages: 1. Using PH controller and dosing pump to automatically control the dosage, fully automated dosing, without manual operation, saving operating costs for enterprises. 2. The filling filler adopts high-quality Raschie ring or Pall ring hollow balls to ensure the residence time of exhaust gas and the contact area of soda water, which can completely remove the peculiar smell and harmful substances in the gas. The upper part is installed with a defogging layer to avoid purifying the air. Carry water out and ensure the treatment effect.