| 摘要 |
PURPOSE: Provided are a zinc oxide-based desulfurizing agent with proper shape, grain size and distribution, strong abrasion resistance and high desulfurizing efficiency, thereby being applicable to a fluidized-bed desulfurization process, a method for fabricating the same, and slurry used for fabricating the agent. CONSTITUTION: The desulfurizing agent is consisted of zinc oxide or zinc oxide precursor 40-60 wt%, regeneration improving agent 4-10 wt% selected from transition metal oxides, a transition metal sulfides, and precursors thereof, a supporting structure of diatomaceous earth 15-50 wt%, and inorganic binder 5-41 wt%, wherein Abrasion Index (AI) of the desulfurizing agent is less than 90%. The method comprises the steps of (a) preparing desulfurizing agent ingredients (raw materials) including zinc oxide or zinc oxide precursor 40-60 wt%, regeneration improving agent 4-10 wt% selected from transition metal oxides, a transition metal sulfides, and precursors thereof, a supporting structure of diatomaceous earth 15-50 wt%, and inorganic binder 5-41 wt%, (b) adding acid or base to the desulfurizing agent raw material to adjust pH thereof and wet-grinding the raw material, (c) adding dispersing agent, organic binder and antifoaming agent to the grinded raw material to obtain raw material slurry, (d) spray drying the slurry to obtain granular type desulfurizing agent, (e) calcining the granular type desulfurizing agent.
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