METHOD OF REMOVING ALKALI METAL AND DEVICE FOR REMOVING ALKALI METAL: Fid-Bau Portal

METHOD OF REMOVING ALKALI METAL AND DEVICE FOR REMOVING ALKALI METAL

HORIBA KANA / TAWARA YUTA / HAMADA KOKI

To provide a method of removing alkali metal and a device for removing alkali metal for efficiently removing the alkali metal from material containing alkali metal such as woody biomass ash.SOLUTION: A method of removing alkali metal includes a heat treatment process of mixing a solid-state material containing alkali metal together with a material containing chlorine, heating the mixture, and thereby forming a chloride of alkali metal to fix the chloride into heat treated material as a solid phase, an alkali metal elution process of slurrying the heat treated material produced in the heat treatment process by adding moisture to the heat treated material and eluting the alkali metal of the chloride contained in the heat treated material in the slurry into a liquid phase and a solid-liquid separation process of performing solid-liquid separation of the slurry passing through the alkali metal elution process to make cake and filtrate.SELECTED DRAWING: Figure 1

【課題】木質バイオマス灰等のアルカリ金属含有物から当該アルカリ金属を効率的に除去するための、アルカリ金属除去方法及びアルカリ金属除去装置の提供。【解決手段】固形状のアルカリ金属含有物を固形状の塩素含有物と一緒にし、該混合物を加熱することによりアルカリ金属の塩化物を形成させて、前記塩化物を加熱処理物内に固相として固定する加熱処理工程と、前記加熱処理工程で生じた前記加熱処理物に水分を加えてスラリー化し、該スラリー中で前記加熱処理物に含まれる前記塩化物の該アルカリ金属を液相中に溶出させるアルカリ金属溶出工程と、前記アルカリ金属溶出工程を経たスラリーを固液分離してケーキ及びろ液となす固液分離工程を備える。【選択図】図１

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