Sulfur Recovery from Hot Coal Gas Desulfurization Processes. Quarterly Progress Report, October 15-December 31, 1984

摘要

Recovery of sulfur in elemental form from the SO sub 2 -containing regenerator offgas will, in general, preferably involve three processing steps. These include SO sub 2 concentration/purification, SO sub 2 reduction/sulfur production, and tail gas treating. The prime candidate processes to date have been operated at near-atmospheric pressure. Based on currently available information, including commercial experience histories, we conclude that Wellman-Lord is the most viable SO sub 2 concentration/purification candidate for this study. Although the assessment of the Shell/UOP copper oxide process has not been completed, we recommend that the process selection conceptual designs proceed based on the use of Wellman-Lord technology with the understanding that if the Shell/UOP or other candidate process assessment proves them to be preferred, it will replace Wellman-Lord in the final conceptual design/economic evaluation, i.e., Project Task 3. METC's agreement with this recommendation has permitted us to continue with our process selection process. We have concluded that RESOX, Allied, BSRP and Augmented Claus are the highest potential SO sub 2 reduction/sulfur production candidates and should be assessed in more detail as a prelude to selection of the total preferred process configuration. Some five tail gas candidates are recommended for further analysis. These include the BSR/Stretford, BSR/MDEA, BSR/Claus, BSR/Selectox and incineration/recycle to the SO sub 2 concentration/purification unit. We have concluded that eleven configurations consisting of combinations of technology candidates should be considered prior to selection of the preferred process configuration to be tested in the Task 2 experimental program and the Task 3 final conceptual design/economic evaluation. 70 refs., 7 figs., 13 tabs. (ERA citation 10:035995)