Method for removing selenium and apparatus for removing selenium

硒去除方法及硒去除装置

Abstract

This method for removing selenium comprises: a valence change step wherein an oxidant is added into waste water from a facility for gasifying a fuel containing selenium in a reducing atmosphere, so that the valence of the selenium is changed by oxidizing the selenium; and a solid-liquid separation step wherein a flocculant is added into the waste water so that a flocculated material containing the selenium, the valence of which has been changed in the valence change step, is formed, and then the flocculated material is subjected to solid-liquid separation.
本发明提供一种硒去除方法,其包括:价数改变工序,在使含有硒的燃料在还原环境中气化的设备的排水中添加氧化剂,使硒氧化而改变硒的价数;固液分离工序,向排水中添加凝聚剂,形成含有在价数变更工序中改变了价数的硒的凝聚物,将该凝聚物进行固液分离。

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