CAJ | 학술논문

为了改善气化炉内气固混合，提高气化炉性能，在干煤粉气化炉内采用气固两相脉动射流，对对置脉冲气固射流气化炉内气固两相流动进行数值模拟，射流喷口速度服从正弦变化，并且对置射流的喷口速度相位差180°。数值模拟预测了脉冲射流速度频率为0．25、1．0和5．0 Hz 时，气体和颗粒速度及浓度的变化规律，得到了颗粒浓度和颗粒压力等分布信息，分析了脉冲射流速度对气化炉内气固流场的改善作用。结果表明，气固两相脉动射流在一定程度上可增强气化炉内气固混合，又降低了射流引起的能耗。
위료개선기화로내기고혼합，제고기화로성능，재간매분기화로내채용기고량상맥동사류，대대치맥충기고사류기화로내기고량상류동진행수치모의，사류분구속도복종정현변화，병차대치사류적분구속도상위차180°。수치모의예측료맥충사류속도빈솔위0．25、1．0화5．0 Hz 시，기체화과립속도급농도적변화규률，득도료과립농도화과립압력등분포신식，분석료맥충사류속도대기화로내기고류장적개선작용。결과표명，기고량상맥동사류재일정정도상가증강기화로내기고혼합，우강저료사류인기적능모。
To improve the gas-solid mixing and the gasifier performance,gas-solid pulsating jet would be used in the gasifier.The gas-solid flows from opposed jets into the gasifier were numerically simulated with the speed of the jet nozzle obeying the sinu-soidal variation and the phase difference of 180 degrees.Numerical simulation predicts the variation of gas and particle velocity and concentration at a frequency of 0.25,1.0 and 5.0 Hz of the pulse jet velocity.The particle concentration and particle pressure distribution were obtained and the improvement of pulse jet velocity gas-solid flow field inside the gasifier was also analyzed.It can be concluded that the gas-solid flows pulse jet can enhance the gasifier gas-solid mixture and reduce the energy consumption caused by jet.