基于CO2气体释放法的煤燃烧特性研究

国内火电厂目前对于煤质的检测主要是通过常规的工业分析检测燃煤挥发分、碳、灰分和发热量等指标信息,指导锅炉的运行。在这些常规分析指标中,反映煤的燃烧特性主要是挥发分的多少。但是,仅凭挥发分来衡量煤的燃烧特性是不完全的1]。此外由于条件限制,目前火电厂对于着火、燃尽等燃烧特性,无法得到。此前,国内一些研究单位采用热重分析技术对我国动力煤燃烧特性进行系统研究,并得到相应的指标。但由于热分析仪大都是从国外进口,仪器成本过高而无法推广和普及。本研究采用基于ＣＯ2气体释放法的煤燃烧特性研究可以较快得出煤的着火点、…

COAL COMBUSTION CHARACTER BASED ON THE RELEASE OF CARBON DIOXIDE

A new low-cost apparatus used to study the character of coal combustion in place of thermograimetric analyzer was developed based on the CO2 release. In order to prove the new idea, CO2 concentration of four coal samples during ignition, combustion and burnout was measured by means of the apparatus developed by the authors. The characters of special machanism based on the relation between the temperature and CO2 concentration (t-CO2), also the derivative curve Dt-CO2 were obtained. The change of CO2 can indirectly estimate the coal combustion characters.