矿物型层状燃煤添加剂的固硫效果  

Captured sulfur effect of mineral type laminar coal combustion additive

作　　者：李哲 赵富全 

机构地区：[1]黑龙江科技大学矿业工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2017年第4期438-442,共5页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省科技攻关计划项目(GZ11A402);黑龙江省应用技术研究与开发计划项目(GC13A112)

摘　　要：为探讨燃煤添加剂固硫效果及固硫机理,以鸡西地区长焰煤和俄罗斯褐煤为原料,选取的石灰石、工业盐等矿物型添加剂按不同比例配成1、2、3号复合燃煤添加剂分别与配合煤混合,采用高温管式电炉在不同温度下进行固硫实验,利用热重分析仪分析燃煤燃烧特性,并对其燃烧灰渣进行XRD和SEM分析。结果表明:3号燃煤添加剂在各温度下有效固硫率最高,850℃时最高达65.38%;与配合煤相比,加入3号添加剂配合煤的TG曲线波动更大,着火点略低,燃烧过程变为2段燃烧且2段燃烧温度较高,燃尽时间延长,燃尽温度升高;物相和形貌分析显示,加入3号添加剂配合煤的物相具有明显改变,其灰渣表面结构也有不同程度的变化。该研究可为燃煤添加剂的研发提供理论参考。This paper is aimed at investigating the effect of sulfur fixation and sulfur retention mecha- nism of coal additives. The research involves performing the sulfur fixation experiments at different tem- peratures using a high temperature tube furnace, employing long flame coal in Jixi area and lignite from Russia as raw materials, adopting limestone, industrial salt and other mineral additives, and depending on the different proportions into 1,2 and 3 composite coal additive, mixed with mixed coal; analyzing the combustion characteristics of coal by therrnogravimetric analyzer, and the combustion ashes by XRD and SEM. The result shows that 3 coal additive has the highest effective sulfur retention rate at various tem- peratures, with a maximum sulfur content of 65.38% at 850 ℃ ; compared with the blending, the blend- ing with No. 3 additive sees a greater TG curve fluctuation and the slightly lower ignition point, in which case the combustion process turns into 2 sections, which involves a higher combustion temperature, with the prolonged burnout time and increased burnout temperature ; and the analysis of phase and morphology shows that the phase change of the coal with the addition of No. 3 additive has an obvious change, and the surface structure of the slag also varies in different degrees. The research could provide a theoretical ref- erence for the research and development of coal additives.

关 键 词：配合煤 燃煤添加剂 有效固硫率 热重 XRD 微观形貌 

分 类 号：TQ534.9[化学工程—煤化学工程]