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本文利用热重差热综合分析仪(TG-DTA),在O_2/N_2及O_2/CO_2气氛下,研究了添加剂在不同氧浓度时对澳煤燃烧特性的影响;同时利用X-射线衍射仪分析了添加剂的物相组成。结果表明:此添加剂为典型的碱上/碱金属氧化物添加剂;在氧摩尔体积浓度为20%时,加入添加剂后澳煤在O_2/CO_2气氛下的燃烧特性优于O_2/N_2气氛;在O_2/CO_2气氛下,澳煤的燃烧特性随氧浓度的升高而一直得到改善,而加入添加剂后澳煤的燃烧特性并非随氧浓度的升高而一直得到改善,而是存在添加剂与气氛之间的协同作用,最佳氧浓度低于40%;且相同条件下加入添加剂后澳煤的燃烧特性优于未加入。
In this paper, the effects of additives on the combustion characteristics of Australian coal at different O 2 concentrations were studied under the conditions of O 2 / N 2 and O 2 / CO 2 using TG-DTA. Meanwhile, by means of X-ray diffraction Additive phase composition. The results show that the additive is a typical alkali / alkali metal oxide additive. When the molar concentration of oxygen is 20%, the combustion characteristics of the coal in O_2 / CO_2 atmosphere is better than that in the O_2 / N_2 atmosphere when the additive is added. / CO_2 atmosphere, the combustion characteristics of Australian coal has been improved with the increase of oxygen concentration. However, the combustion characteristics of Australian coal has not been improved with the increase of oxygen concentration, but with the additive and the atmosphere The optimal oxygen concentration is less than 40%; and the combustion characteristics of the coal after the addition of additives under the same conditions are better than those without addition of the coal.