The exhaust gas enters the purification tower from the inlet of the tower body, and under the power of the ventilator, rapidly fills the space of the intake section, and then uniformly rises through the equalization section to the absorption section of the filler. On the surface of the filler, ammonia reacts with water or sulfuric acid to form NH3-OH, (NH4)2SO4, and flows into the lower sump. The ammonia gas that is not completely absorbed continues to rise into the spray section.
Under the dual action of biochemical and cut-off of biofilm on the surface of large-grain lightweight ceramsite filter material, the pretreatment of water ammonia 0.5mg/L provides an efficient, energy-saving and land-saving treatment process for the treatment of micro-polluted source water.
In the spray section, the absorbing liquid is ejected from the uniform nozzle at a high speed to form numerous fine droplets, which are intimately mixed with the gas to continue the chemical reaction, and then the ammonia gas rises to the secondary packing section and the spray section to perform similarly. Absorption process. The second stage is different from the nozzle density, the spray pressure is different, and the range of absorbed acid gas concentration is also different. The process of contact between the spray section and the packed section is also a process of heat transfer and mass transfer.
The process is adequate and stable by controlling the tower flow rate and residence time. The upper part of the tower body is a defogging section, and the absorbing liquid mist trapped in the gas is removed here, and the treated clean air is discharged into the atmosphere from the exhaust pipe at the upper end of the purification tower. NH3-OH, (NH4)2SO4, which is absorbed by water or sulfuric acid, can be used for boiler desulfurization or agricultural fertilizer.