NUMERICAL STUDY OF DESULPHURIZATION PROCESS BY THE AMMONIUM SEMI-DRY METHOD
The paper presents the results of numerical investigation of heat and mass transfer processes in the drip-type chemical reactor. The reactor is operated by the semi-dry method of desulphurization with ammonia technology. Water for irrigation gas and aqueous ammonia solution fed to the reactor either together or separately. Studies have shown that the efficiency of desulfurization process and the gas temperature at the outlet of the reactor depends on the method of supplying the liquid into the working zone, flow of water and additional air. It is found that a significant amount of ammonia from the solution passes into the gaseous medium due to desorption. Thus, the chemical binding of sulfur dioxide in the reactor is due to homogeneous reactions in a liquid medium and gas. Firstly, this reduces the formation of ammonium sulfite and ammonium sulfate in the liquid droplets. Secondly, it leads to increased formation of adducts in the gas volume of the working zone of a chemical reactor. Is been determined that the ammonium semi-dry method allows chemically bind more than 97 % of sulfur dioxide, which is output with flue gases of the boiler unit.Bibl. 14, Fig. 6, Table 1.
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