Article ID Journal Published Year Pages File Type
6578482 Chemical Engineering Journal 2018 36 Pages PDF
Abstract
A novel multistage fluidized bed was proposed to improve the desulfurization efficiency of activated char in a circulating fluidized bed-flue gas desulfurization process. The hydrodynamics of gas-solid flow in the multistage fluidized bed was experimentally studied. Results showed that the overall pressure drop of the bed had a good linear relationship with the ratio of the superficial gas velocity and the solid circulation rate. Compared with the conventional fluidized bed for desulfurization, a relatively uniform upward flow over a cross section was observed in the middle conveying section of the multistage fluidized bed. Intensive gas-solid interaction in the expanding section of the multistage fluidized bed was confirmed. In addition, a uniform suspension upward flow with minimal solid backmixing at the upper portion of the expanding section was observed under limited operating conditions. Finally, the gas-solid flow structure in the expanding section of the multistage fluidized bed was depicted.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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