气流床气化炉压力波动信号的R/S分析  

R/S Analysis of Pressure Fluctuation Signal of Entrained-Flow Gasifier

作　　者：牛苗任[1] 梁钦锋[1] 于广锁[1] 王辅臣[1] 于遵宏[1] 

机构地区：[1]华东理工大学洁净煤技术研究所,上海200237

出　　处：《燃烧科学与技术》2005年第5期458-464,共7页Journal of Combustion Science and Technology

基　　金：上海市启明星计划资助项目(03QF14013);国家高技术研究发展计划(863)资助项目(2003AA521020);国家重点基础研究发展规划(973)资助项目(2004CB217703).

摘　　要：在利用炉膛压力信号对气化炉内燃烧稳定性进行诊断方面开展了试验研究工作.采用R/S分析(rescaledrangeanalysis)方法研究了气化炉内的压力波动信号,得到相应的压力波动Hurst指数,说明气流床气化炉内的压力波动具有分形特征.增大氧油比(氧气进料量(m^3/h)/柴油进料量(kg/h)),炉内接近烧嘴位置处的Hurst指数将增大.所以,通过计算炉内接近烧嘴位置处Hurst指数变化大小的情况,可以分析炉内的燃烧情况.发现热态条件下,Hurst指数变化范围比冷态条件下Hurst指数变化范围大.在不同实验条件下,冷态气化炉内压力波动信号的分形维数变化范围为1.25～1.40.Investigation is conducted in monitoring the flame stability of the entrained-flow gasifier. Different pressure signals of the gasifier are calculated with the R/S analysis （rescaled range analysis） to obtain the corresponding Hurst exponents, which shows that the pressure signals possess the fractal characteristics. When the feed-in flux proportion of oxygen and diesel oil increases, the Hurst exponents closed to nozzles increase. Therefore, through calculating the Hurst exponents closed to nozzles, the flame status can be analyzed. In combustion condition, the fluctuation range of Hurst exponents is more than that in noncombustible condition. In different noncombustible experiment conditions the fluctuation range of fractal dimensions for the differential-pressure signals of entrained-flow gasifier is 1.25--1.40.

关 键 词：煤气化 气流床 压力波动 分形 R/S分析 

分 类 号：TQ546.2[化学工程—煤化学工程]