FUELING GAS TREATMENT METHOD AND DEVICE FOR TREATING ACID TAIL GAS USING THE AMMONIA PROCESS

摘要

A method of treating flue gas for treating acid tail gases using an ammonia process, comprising the following steps: 1) controlling the concentration of sulfur dioxide in the acid tail gases entering the absorber to ≤30000 mg / Nm; 2) spraying process water or / and ammonium sulphate solution for cooling in the inlet channel of the absorber or inside the absorber; 3) the creation of an oxidation section in an absorber, where the oxidation section is equipped with oxidation dispensers, to oxidize the desulfurization absorption solution; 4) the creation of an absorption section in the absorber, where the absorption section carries out absorption spraying desulfurization using dispensers of the absorption solution with an absorption solution containing ammonia; ammonia-containing adsorption solution is fed through an ammonia storage tank; 5) creating a flushing layer of water over the absorption section in the absorber, where the flushing layer of water washes the absorption solution in the tail gas to reduce the leakage of the absorption solution; b) creating a moisture trap above the wash water layer inside the absorber to control the concentration of mist droplets contained in the purified tail gas. In the coal chemical industry, combining Claus sulfur extraction and ammonia desulphurization technology can reduce investment in downstream processing, simplify the process and provide great advantages for controlling the installation environment.