Treatment of acid and alkali waste gas (spray tower)

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Acid and alkali waste gas treatment towers are usually divided into single-tower and double-tower types. It features a circular tower body that is connected in sections using flanges. It specifically consists of a liquid storage tank, a tower body, an air inlet section, a spray layer, a packing layer, a swirl mist removal layer, an air outlet cone cap, inspection holes, etc. Schematic diagram of the acid and alkali waste gas treatment tower (spray tower): Working principle: The main way in which the acid and alkali waste gas treatment system (spray tower) functions is that the acidic mist-containing waste gas is introduced into the purification tower through air ducts. As it passes through the packing layer, the waste gas comes into full contact with sodium hydroxide absorption solution, resulting in a gas-liquid absorption and neutralization reaction. After being purified, the acidic mist-containing waste gas is dehumidified and demisted using a demisting plate before being discharged into the atmosphere by a fan. The absorbent liquid is pressurized by a water pump at the bottom of the tower and then sprayed downward to the top of the tower, before finally returning to the bottom of the tower for reuse. The purified acid mist exhaust gas meets the requirements below the **emission standards. Process flow of the waste gas treatment system: The acidic mist waste gas is discharged → enters the air duct → passes through the acid and alkali waste gas treatment tower → goes through a fan → returns to the air duct → and is released after meeting the standards. The acid and alkali waste gas treatment tower (spray tower) has the following features: 1. It uses a packed tower to purify waste gas, making it suitable for treating waste gas that is emitted continuously or intermittently ； 2. The process is simple; management, operation, and maintenance are quite convenient and straightforward, without causing any impact on the workshop’s production ； 3. Wide range of applications, capable of purifying multiple types of pollutants simultaneously ； 4. It features a low pressure drop, high operational flexibility, and excellent mist removal performance ； 5. The tower body can be made of materials such as FRP/PP/PVC depending on actual conditions ； 6. High-efficiency, low-resistance packing such as Pall rings is used, which can completely remove unpleasant odors and harmful substances from the gas. 7. The waste gas treatment tower employs a multi-stage waste gas adsorption and filtration purification system; the industrial waste gas is treated in a thorough manner, with waste gas being purified through successive stages of filtration. Acid and alkali waste gas treatment towers are widely used for the purification of acidic and alkaline waste gases emitted during industrial processes in sectors such as chemicals, electronics, metallurgy, electroplating, textiles (fiber optics), food processing, and machinery manufacturing. Such as flavoring foods, acid production, pickling, electroplating, electrolysis, batteries, etc.