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    • 32. 发明申请
    • METHOD FOR TREATING RESIDUES RESULTING FROM THE PURIFICATION OF GARBAGE AND/OR INDUSTRIAL WASTE INCINERATION FUMES
    • 用于处理来自粪便和/或工业废物焚化炉的净化产生的残留物的方法
    • WO98056464A1
    • 1998-12-17
    • PCT/FR1998/001179
    • 1998-06-10
    • A62D3/33A62D3/36A62D101/08A62D101/40A62D101/43A62D101/47A62D101/49B01D53/34B01D53/50B01D53/52B01D53/64B01D53/77B01D53/81B09B3/00B09B5/00A62D3/00
    • A62D3/36A62D3/33A62D2101/08A62D2101/40A62D2101/43A62D2101/47A62D2101/49A62D2203/02B09B3/0016B09B2220/06Y02W30/20
    • The invention concerns a method for treating residues derived from garbage and/or industrial waste incineration fumes comprising the following steps: A: desalting (1, 1') the residues by washing with sodium carbonate (2) in sufficient amount or slightly in excess to solubilize all the salts including the sulphates and precipitate the soluble calcium, the pH being higher than 11, then carrying out a solid/liquid separation to obtain a desalinised cake (3); B: lixiviating said cake (3) resulting from step A with sodium carbonate in sufficient amount or slightly in excess to obtain by reaction with the lime present in the cake or added thereto if necessary, the alkalinity required for solubilizing amphoteric metals, the pH being higher than 12, obtaining by solid/liquid separation a cake (6) and a supernatant (7) which is neutralised with carbon dioxide (8) and filtering the recuperated solution to obtain metal hydroxide sludge (11) and an aqueous sodium carbonate solution (14) which can be recirculated towards step B itself, and C: neutralising at a pH between 6.5 and 8.5, the residues (6, 6') resulting from step B.
    • 本发明涉及一种用于处理来自垃圾和/或工业废物焚烧烟雾的残渣的方法,包括以下步骤:A:用碳酸钠(2)以足够量或稍微过量洗涤以除去(1,1')残余物, 溶解包括硫酸盐在内的所有盐,并沉淀可溶性钙,pH高于11,然后进行固/液分离,得到脱盐饼(3); B:将由步骤A得到的所述蛋糕(3)浸泡得足够量或稍微过量的碳酸钠,以便通过与蛋糕中存在的石灰反应获得,如果需要,则加入其中,加入两性金属所需的碱度,pH为 高于12,通过固/液分离获得用二氧化碳(8)中和的滤饼(6)和上清液(7),并过滤回收的溶液以获得金属氢氧化物污泥(11)和碳酸钠水溶液( 14),其可以再循环到步骤B本身,C:在6.5和8.5之间的pH下中和由步骤B产生的残余物(6,6')。