CAJ | 학술논문

　　大型循环流化床(CFB)锅炉在低负荷运行时，较多存在沿宽度方向两侧床压交替大幅度波动的床压横向波动现象，严重影响锅炉的正常、安全运行。为了深入分析床压横向波动问题，在2台300 MW亚临界单炉膛、三分离器循环流化床锅炉上进行测试。在50%负荷的工况下，炉膛发生了床压横向波动，波动周期分别为83和116 s，波动幅度分别达到5和11 kPa。运行数据分析表明：产生床压横向波动的原因并非外循环回路不均匀导致。提出了大尺度气固两相流动系统固有波动频率的概念，认为炉膛横向压力波动是由风–床系统的压力波动的共振引起的，并建立压力波动简化模型，模型计算能够较好的符合实验结果。建议通过流态重构和调整一次风管网结构来避免床压横向波动的发生。
　　대형순배류화상(CFB)과로재저부하운행시，교다존재연관도방향량측상압교체대폭도파동적상압횡향파동현상，엄중영향과로적정상、안전운행。위료심입분석상압횡향파동문제，재2태300 MW아림계단로당、삼분리기순배류화상과로상진행측시。재50%부하적공황하，로당발생료상압횡향파동，파동주기분별위83화116 s，파동폭도분별체도5화11 kPa。운행수거분석표명：산생상압횡향파동적원인병비외순배회로불균균도치。제출료대척도기고량상류동계통고유파동빈솔적개념，인위로당횡향압력파동시유풍–상계통적압력파동적공진인기적，병건립압력파동간화모형，모형계산능구교호적부합실험결과。건의통과류태중구화조정일차풍관망결구래피면상압횡향파동적발생。
When large-scale circulating fluidized bed (CFB) boiler working under low load condition, severe lateral bed pressure wave often occurs and poses a serious threat to boiler stability and safety. In order to further analyze lateral bed pressure wave, testing works were carried out on two 300MW sub-critical CFB boilers. Under 50%percent load of the boiler, severe periodical pressure fluctuation happened. The periodical pressure fluctuations were over 5kPa and 11kPa, with a cycle of 83s and 116s respectively. From the test result, the external circle loops are not to be considered as the reason of lateral bed pressure wave. Based on the theory of air-bed system resonance, a large scale gas-solid flow self-fluctuation model was proposed. The model results are basically consistent with experiment data. Fluidization reconstruction and pipe modification will avoid lateral bed pressure wave.