B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/34 (2006.01) B01D 53/52 (2006.01) C01B 17/16 (2006.01) C01B 17/56 (2006.01)
Patent
CA 2047660
ABSTRACT OF THE DISCLOSURE: Process for a simultaneous removal of SO2 and H2S from exhaust gases in which the exhaust gases are contacted in a first stage in a countercurrent operation with a first suspension, which contains 60 to 95 g/l ZnSO3, 80 to 90 g/l ZnO, and 0.1 to 1.0 g/l ZnS. 40 to 60% by volume of the suspension collected in the sump of the first stage are recycled and are re-supplied to the first stage at its top. The exhaust gas which has been depleted of SO2 and H2S is contacted in a second stage in a countercurrent operation with a second suspension, which contains 80 to 150 g/l ZnO, and with a third suspension, which contains 60 to 95 g/l ZnSO3, 80 to 90 g/l ZnO, and 0.1 to 1.0 g/l ZnS 40 to 60% by volume of the suspension which as been collected in the sump of the secnd stage are recycled and are re-supplied as the third suspension to the second stage at its top. The pure gas is withdrawn from the second stage at its top.
Metallgesellschaft Aktiengesellschaft
Robic
LandOfFree
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