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Remediation of ash problems in fluidised-bed combustors

机译：补救流化床燃烧器中的灰分问题

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The paper reports the control methods for mitigating particle agglomeration and bed defluidisation during fluidised-bed combustion of low-rank coals. A laboratory scale spouted-bed combustion system is used to study the effectiveness of several control methods including the use of alternative bed materials, mineral additives, pretreatment of coal and coal blending. Sillimanite, bauxite, calcite and magnesite were used as alternative bed materials whereas mineral additives viz. Clay, kaosil and bauxite were injected into the combustion system while burning South Australian low-rank coal at 800deg.C. Samples of the same coal subjected to water-washing, Al pretreatment and Ca pretreatment are also tested in the spouted-bed combustor. In addition, experiments were conducted with several coal blends prepared at ratios of 50:50 and 90:10 from two lignites and one sub-bituminous coal.
机译：该论文报道了在低阶煤流化床燃烧过程中减轻颗粒团聚和床层流失的控制方法。实验室规模的喷床燃烧系统用于研究几种控制方法的有效性，包括使用替代床材料，矿物添加剂，煤的预处理和煤掺合。硅线石，铝土矿，方解石和菱镁矿被用作替代床料，而矿物添加剂也是如此。将粘土，高岭土和铝土矿注入燃烧系统，同时在800℃下燃烧南澳大利亚低阶煤。还在喷水床燃烧室中对经过水洗，Al预处理和Ca预处理的相同煤的样品进行了测试。此外，还对由两种褐煤和一种亚烟煤以50:50和90:10的比例制备的几种混合煤进行了实验。

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