Overview of Waste Gas Purification Tower
The Waste Gas Purification Tower is a device designed to purify various toxic and harmful waste gases by using different chemicals according to the type of waste gas, employing a wet scrubbing method. Waste Gas Purification Towers are generally categorized by their application, including Acid Mist Towers, Bio Towers, Air Purification Towers, Smoke Purification Towers, and more. These towers have been designed by integrating the best practices from technologies such as Foam Towers, Spray Towers, and Filler Towers, not only providing purification for toxic and harmful gases but also offering dust removal capabilities.
The waste gas purification tower is suitable for waste gas treatment in industries such as electroplating production, surface treatment, monocrystalline silicon acid washing, semiconductor cleaning, electronic manufacturing, insulated wire, paint spraying, and coating production.
2. Principle of Waste Gas Purification Tower
The Waste Gas Purification Tower: It is a two-phase countercurrent packed tower. Waste gases enter the purification tower from the bottom inlet of the waste gas treatment tower body along the tangential direction. Under the power of the fan, they quickly fill the inlet section space and then uniformly rise through the uniform flow section to the first stage packed absorption section. On the surface of the packing, acidic (or alkaline) substances in the gas phase react chemically with alkaline (or acidic) substances in the liquid phase, and the reaction products (usually soluble acids or bases) flow into the lower storage tank with the absorption liquid. Unabsorbed acidic (or alkaline) gases continue to rise into the first stage spray section. In the spray section, the absorption liquid is ejected at high speed from uniformly distributed nozzles, forming numerous tiny mist droplets, which thoroughly mix and contact with the gas, continuing the chemical reaction. Then, the acidic (alkaline) gases rise to the second stage packed section and spray section for absorption processes similar to the first stage. The second stage has a different nozzle density and spray pressure from the first stage, resulting in a different concentration range of absorbed acidic (alkaline) gases. The process of two-phase contact in the spray and packing sections is also a heat and mass transfer process. The process is ensured to be fully and stably conducted by controlling the empty tower velocity and residence time. The top of the waste gas treatment tower is the demisting section, where the absorption liquid mist droplets in the gas are removed. After treatment, the clean air is discharged into the atmosphere through the exhaust pipe at the top of the waste gas purification tower.
