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    • 28. 发明公开
    • Method for recovering phosphorus from organic sludge
    • Verfahren zurRückgewinnungvon Phosphor aus organischenSchlämmen
    • EP0972577A3
    • 2001-12-05
    • EP99102768.1
    • 1999-02-23
    • NKK CORPORATION
    • Nakahara, Keisuke Int. Prop. Dept.Hoshino, Yasushi Int. Prop. Dept.Matsui, Satoshi Int. Prop. Dept.Shinagawa, Takuya Int. Prop. Dept.
    • B09B3/00C01B25/00
    • B09B3/00C01B25/003
    • A method for recovering phosphorus from organic sludge includes the steps of producing incinerated ash from organic sludge, mixing the incinerated ash with a carbon source, vaporizing phosphorus from phosphorus compounds in the incinerated ash by heating the incinerated ash mixed with the carbon source in a non-oxidizing atmosphere, preferably, at 1,000 to 1,250°C, and recovering phosphorus by bringing the vaporized phosphorus into contact with water to condense the vaporized phosphorus. Alternatively, the vaporized phosphorus is oxidized to phosphorus pentoxide, and phosphorus is recovered as phosphoric acid by bringing the phosphorus pentoxide into contact with water. Instead of the steps of producing incinerated ash from organic sludge and mixing a carbon source with the incinerated ash, by dehydrating and drying organic sludge and carbonizing organic substances in the organic sludge, preferably, at 400 to 700°C, similar effects can be obtained.
    • 从有机污泥中回收磷的方法包括以下步骤:从有机污泥中生产焚烧灰,将焚烧灰与碳源混合,将焚化灰中的磷化合物的磷蒸发,加热与碳源混合的焚烧灰, 氧化气氛,优选在1000〜1250℃,通过使蒸发的磷与水接触以使蒸发的磷冷凝来回收磷。 或者,蒸发的磷被氧化成五氧化二磷,通过使五氧化二磷与水接触,作为磷酸回收磷。 代替从有机污泥中生产焚烧灰并将碳源与焚烧灰混合的步骤,通过在有机污泥中脱水和干燥有机污泥和碳化有机物质,优选在400至700℃下,可获得类似的效果 。