OP-II-3

PP-II-51data such flow sheet provides the achievement of 97-98% conversion at treatment ofgases with inlet SO 2 concentration varying in the range from 2-2.5 up to 7-8% vol.Another challenge in this area is development of reverse-processes for treatmentof extra-strong smelter gases with SO 2 concentration as high as 35-40% vol. Thenew DC/DA reverse-process flow sheets with SO 3 recycle [4] and new version ofabsorption-catalytic reverse-process (Fig.2) make possible to treat such gases withoverall conversion degree up to 99.96%.CATALYTICCONVERTERABSORBER A1HEAT EXCHANGERHEX1C1HIGH PRESSURESTEAMHEAT EXCHANGERHEX3C2WASTE HEATBOILER WHB1OUTLET GASIn1SWITCHINGVALVE V3C3In2RECYCLEPUMPIn3INITIALSTRONGGASC4In4SWITCHINGVALVE V4HEAT EXCHANGERHEX2ABSORBER A2SWITCHINGVALVE V1SWITCHINGVALVE V2AIRFig.2. Absorption-catalytic reverse-process for treatment of smelter gases with SO 2concentration up to 40% vol.References[1]. Yu.Sh. Matros, G.A. Bunimovich. Catal.Rev.-Sci.Eng., 38(1), 1996, pp.1-68.[2]. Russian Patent No. 2213045, 2003.[3]. Yu.Sh. Matros, A.S. Noskov, A.N. Zagoruiko, O.V. Goldman. Theor. Found. Chem. Technol.,1994, 28(2), pp.139-144.[4]. Eurasian Patent No. 006757, 2005.427