CAJ | 학술논문

采用自制固定床热解装置在隔绝空气的条件下制备神木长焰煤热解终温分别为400℃、450℃、500℃及550℃的热解半焦，利用管式沉降炉模拟高炉喷吹条件研究神木长焰煤低温热解半焦的燃烧性能，并考察了热解终温、半焦喷吹粒径以及燃烧反应温度对半焦燃烧性能的影响。研究表明：低温热解半焦的燃烧性能优于实验所选用无烟煤的燃烧性能，半焦的燃烧性能与其燃料比之间存在负相关关系，即燃料比越高，燃烧性能越差；降低热解终温、减小半焦喷吹粒径以及提高燃烧反应温度均能改善半焦的燃烧性能，当热解终温为400℃、喷吹粒径100～200目、燃烧反应温度为1100℃时半焦的燃尽度最佳为96%。本实验半焦制备及燃烧条件与现有低温热解和高炉喷吹工艺相符，且热解半焦各项性能均符合喷吹用煤指标。
채용자제고정상열해장치재격절공기적조건하제비신목장염매열해종온분별위400℃、450℃、500℃급550℃적열해반초，이용관식침강로모의고로분취조건연구신목장염매저온열해반초적연소성능，병고찰료열해종온、반초분취립경이급연소반응온도대반초연소성능적영향。연구표명：저온열해반초적연소성능우우실험소선용무연매적연소성능，반초적연소성능여기연료비지간존재부상관관계，즉연료비월고，연소성능월차；강저열해종온、감소반초분취립경이급제고연소반응온도균능개선반초적연소성능，당열해종온위400℃、분취립경100～200목、연소반응온도위1100℃시반초적연진도최가위96%。본실험반초제비급연소조건여현유저온열해화고로분취공예상부，차열해반초각항성능균부합분취용매지표。
Shenmu long-flame coal chars were prepared at carbonization temperature 400℃,450℃, 500℃,550℃ respectively using fixed bed pyrolysis apparatus under isolated condition. Reaction of pulverized coal injection(PCI)in a blast furnace was simulated using a drop tube furnace (DTF) to investigate the burnout behavior of low rank coal char and the influence of final pyrolysis temperature, particle size,combustion reaction temperature on combustion behavior. Char combustion behavior was better than anthracite selected in this test,and there was a negative relationship between char combustion behavior and fuel ratio. The higher the fuel ratio,the worse the combustion behavior. Decreasing final pyrolysis temperature and particle size,increasing combustion reaction temperature could improve char combustion behavior. When final pyrolysis temperature was 400℃,particle size was 100—200 mesh,combustion reaction temperature was 1100℃,burnout of coal char was 96%. Preparation and combustion conditions of coal char were similar to existing low temperature pyrolysis and blast furnace injection process,and performance of char met the requirements of blast furnace injection coal.