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为了研究块煤在熔融气化炉内高温结构演变和降解机制,采用扫描电镜和光学显微镜观察了COREX熔融气化炉风口焦和实验室自制半焦的形貌和显微结构,并结合不同试样的高温反应特性,确定了不同风口焦试样的来源。结果表明,风口焦中兴隆庄块煤形成试样含有较多的中粒和粗粒镶嵌结构,表面呈孔状结构;大同块煤形成试样中类丝炭较多,表面呈层状结构。根据结果提出应考虑灰分对煤焦高温强度的影响,在测量风口焦试样的反应性及反应后强度时应考虑灰分含量进行折算,并确定了以灰分的基准含量为13%进行折算为最佳条件。
In order to study the high-temperature structural evolution and degradation mechanism of lump coal in a melter-gasifier, the morphology and microstructure of COREX fused gasifier tuyere and laboratory-made semi-coke were observed by scanning electron microscopy and optical microscopy. The kind of high temperature response characteristics, to determine the source of different tuyere samples. The results show that the sample of Xinglongzhuang coal formed in tuyere coke contains more medium-sized grains and coarse-grained inlaid structure with pore structure on the surface; According to the results, it is suggested that the influence of ash content on the high temperature strength of coal tar should be considered. The reactivity of the coke sample and the post-reaction ash content should be taken into account when calculating the ash content. The baseline content of ash content is 13% Good condition.