Amorphous FeOOH and method for regenerating desulfurizing agent taking amorphous FeOOH as active ingredient

Abstract

The invention relates to a method for regenerating a desulfurizing agent taking amorphous FeOOH as an active ingredient, which comprises the following steps: grinding the waste agent after the amorphous FeOOH is used as the desulfurizing agent into granules to obtain waste agent powder; preparing the waste agent powder into suspension, introducing oxygen-containing gas into the suspension for oxidation, making iron sulfide in the suspension converted into the amorphous FeOOH and elemental sulfur so as to form slurry containing the amorphous FeOOH and simple substance sulfur; and putting the slurry in a container, introducing air into the container to make the elemental sulfur floating upwards, wherein the sediment on the lower part of the container is the regenerated amorphous FeOOH. The regeneration method solves the problems that a large amount of waste agents can only be buried, not only effective resources in the original desulfurizing agent are wasted, but also the environment is seriously polluted because the other desulfurizing agents used in the prior art cannot be regenerated after being used once or the regeneration cost is high.

Description

technical field [0001] The invention relates to a regeneration method after amorphous iron oxyhydroxide is used as a desulfurizer, and also relates to a regeneration method of a desulfurizer using amorphous iron oxyhydroxide as an active component, belonging to the technical field of desulfurizers. Background technique [0002] In the prior art, especially in the aspect of industrial application, there are relatively few studies on the preparation and regeneration of amorphous iron oxyhydroxide. In the article titled "Study on the desulfurization activity of iron oxyhydroxide prepared by different methods" ("Coal Conversion" Vol. 29 No. 3), different crystalline iron oxyhydroxides such as α-FeOOH, β-FeOOH, γ- The room temperature gas desulfurization activity of FeOOH and amorphous iron oxyhydroxide, among which amorphous iron oxyhydroxide has higher desulfurization activity. However, there is no disclosure in this article about the regeneration of amorphous iron oxyhydroxide...

AI Technical Summary

Problems solved by technology

However, the above research is still in the stage of laboratory exploration. The regeneration of amorphous iron oxyhydroxide in the natural state is very slow and takes a long time, so it cannot meet the requirements of rapid and large-scale regeneration required by industrial production.

[0004] An important purpose of the applicant's above-mentioned research is to achieve industrial mass regeneration of the amorphous iron oxyhydroxide after use. If this can be achieved, it will be a major change in the field of desulfurizers, and it can solve the current problem. Other types of desulfurizers used in the prior art cannot be regenerated or the cost of regeneration is high, so a large amount of waste agents can only be landfilled, which not only wastes the effective resources in the original desulfurizer, but also causes serious pollution to the environment