CAJ | 학술논문

为将煤热解 FD 模型引入对煤热解实际过程的数值计算与分析，提出了适用于煤热解实际过程的数值计算方法。分别对3种不同的煤在热管反应器中的热解过程进行了数值计算，并与实验结果以及已有的FG-DVC模型、CPD 模型的数值计算结果进行了对比分析。并分析了热解温度、颗粒粒径对煤热解产物的影响。结果表明，与FG-DVC 模型、CPD 模型相比，FD 模型的计算精度更高，能更好地用于数值计算煤热解的实际过程；随着热解温度的升高，气体产量先快速增大，当热解温度高于1373 K时，气体产量的变化很小；而随着热解温度的升高，焦油产量一直逐渐减小，且达到焦油产量最大值所需的时间也缩短；随着颗粒粒径的增大，气体与焦油的产量都逐渐减小，而达到焦油产量最大值所需的时间却延长。
위장매열해 FD 모형인입대매열해실제과정적수치계산여분석，제출료괄용우매열해실제과정적수치계산방법。분별대3충불동적매재열관반응기중적열해과정진행료수치계산，병여실험결과이급이유적FG-DVC모형、CPD 모형적수치계산결과진행료대비분석。병분석료열해온도、과립립경대매열해산물적영향。결과표명，여FG-DVC 모형、CPD 모형상비，FD 모형적계산정도경고，능경호지용우수치계산매열해적실제과정；수착열해온도적승고，기체산량선쾌속증대，당열해온도고우1373 K시，기체산량적변화흔소；이수착열해온도적승고，초유산량일직축점감소，차체도초유산량최대치소수적시간야축단；수착과립립경적증대，기체여초유적산량도축점감소，이체도초유산량최대치소수적시간각연장。
For numerical simulation of coal pyrolysis using the fragmentation and diffusionn (FD) model, a numerical method was proposed. The pyrolysis of three kinds of coal in a heated-tube reactor was simulated respectively, and the results were compared with the experimental results and also with the numerical results of FG-DVC model and CPD model. The effect of pyrolysis temperature and particle diameter on coal pyrolysis product was also studied. The accuracy of FD model was higher than FG-DVC model and CPD model, proving that FD model was more applicable for numerical simulation of coal pyrolysis. The gas product increased rapidly by increasing pyrolysis temperature until 1373 K, and then was nearly constant when pyrolysis temperature was higher than 1373 K. The tar product decreased with increasing pyrolysis temperature, and less time was needed to reach the maximum tar amount. The gas product and tar product both decreased by increasing particle diameter of coal, while more time was needed to reach the maximum tar amount.