CAJ | 학술논문

煤灰的熔融和结渣特性就是影响燃煤锅炉正常运行的主要原因,煤灰燃烧过程中的相变的研究对分析锅炉低温共熔和结焦有重要意义.本文分别对灰样和加入助熔剂的灰样进行热重分析,结合TG、DTG、DSC曲线在DDSC曲线上判别发生相变的温度段,然后利用X-射线衍射法对其机理进行分析并验证热重实验的结论.XRD法分析结果验证了TG-DSC法的DDSC曲线能够判别煤灰中的相变温度段,证明运用TG-DSC分析煤灰发生相变的温度段是有一定可行性的,而且把TG-DSC和XRD两种方法结合起来研究煤灰相变机理的技术是有效的.
매회적용융화결사특성취시영향연매과로정상운행적주요원인,매회연소과정중적상변적연구대분석과로저온공용화결초유중요의의.본문분별대회양화가입조용제적회양진행열중분석,결합TG、DTG、DSC곡선재DDSC곡선상판별발생상변적온도단,연후이용X-사선연사법대기궤리진행분석병험증열중실험적결론.XRD법분석결과험증료TG-DSC법적DDSC곡선능구판별매회중적상변온도단,증명운용TG-DSC분석매회발생상변적온도단시유일정가행성적,이차파TG-DSC화XRD량충방법결합기래연구매회상변궤리적기술시유효적.
Melting and slagging characteristics of coal ash are the main factors that harm the function of boilers.It is significant to recognize the phase-transition temperature in coal combustion for low temperature congruent melting and slagging.In this paper,ash and ash-added flux are analyzed with thermogravimetry method,and the phase-transition temperature range is judged in the DDSC curve combining the TG.DTG and DSC curves.It is feasible that DDSC curves of TG-DSC method is used to 1udge the temperature range where the phase-transition happens in the ash on the basis of XRD.The mechanism is found bv X-ray diffraction analysis,which verifies the result of DDSC.It is proved that analyzing the phase-transition temperature range of coal ash by TG-DSC is feasible,and it is valid to study the phase-transition mechanism of coal ash by using TG-DSC and XRD methods.