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    • 7. 发明申请
    • BURNING/MELTING METHOD OF WASTE MELTING FURNACE
    • 燃烧熔融炉的熔融/熔融方法
    • WO1997049954A1
    • 1997-12-31
    • PCT/JP1997002149
    • 1997-06-23
    • NIPPON STEEL CORPORATIONISHIDA, YoshihiroTAWARA, YouichiKATO, YasuhikoONO, YoshihiroKURIBAYASHI, KazuhiroFUKINAKA, NorioHARAJIRI, HachiroMURAHASHI, Kazuki
    • NIPPON STEEL CORPORATION
    • F23G05/24
    • F23G5/085F23G5/24F23L2900/07007Y02E20/344
    • Sinking of a charge in a cross-sectional direction of a melting furnace is made uniform, poor heat-exchange between the charge and a gas due to improper sinking of the charge and local concentration of a gas flow is reduced to minimum, a melting condition of wastes is stabilized irrespective of the composition of the wastes, and a charge of a treating speed of the wastes is restricted, too. A plurality of lower stage tuyeres are disposed vertically in a burning/melting zone, carbonaceous mass-like inflammable matters are mainly burnt by supplying a combustion support gas, a plurality of upper stage tuyeres are disposed vertically in a plurality of stages at the positions above the tuyeres, and a part of the wastes is burnt by supplying the combustion support gas. In this instance, the combustion support gas equivalent to oxygen content of 130 to 600 Nm /t of wastes is supplied, and the combustion support gas is supplied from the upper stage tuyeres so that the proportion of the oxygen content from the upper tuyeres is 0.2 to 0.8 of the sum of those of the lower and upper stages. Further, the supply quantity is controlled so that the oxygen content supplied from the lower stage tuyeres is at least 0.8 times the theoretical oxygen content of the carbonaceous mass-like inflammable matters, and the exhaust gas temperature on the packing layer of the wastes is set to 150 to 700 DEG C.
    • 使熔融炉的横截面方向的电荷沉降均匀,由于电荷的不适当的下降和气流的局部浓缩,电荷与气体之间的热交换差降低到最小,熔融条件 废物的成分不管废物的组成是否稳定,并且废物的处理速度受到限制。 多个下级风口垂直设置在燃烧/熔化区域,主要通过供给燃烧载体气体来燃烧碳质物质的易燃物质,多个上级风口在上述位置处以多级垂直设置 风口和一部分废物通过供给燃烧载体气而燃烧。 在这种情况下,供给相当于氧含量为130〜600Nm 3 / t废弃物的燃烧载体气体,并且从上级风口供给燃烧载体气体,使得来自上层的氧含量的比例 风口是下段和上段总和的0.2〜0.8。 此外,控制供给量使得从下级风口供给的氧含量为碳质物质状易燃物的理论氧含量的0.8倍以上,废弃物的包装层上的废气温度设定为 至150〜700℃