Investigation on the Dynamic Characteristics of Double Distributor Fluidized Bed for Aromatics Ammoxidation
I. Fluidization Characteristics and Pressure Fluctuation Signal Analysis
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
Abstract：The basic fluidization parameters such as collapse characteristics, minimum fluidization velocity and initial turbulent velocity of NC-IV catalyst were obtained by measuring the local pressure signal in a fluidized bed reactor for aromatics ammoxidation. The pressure distribution and pressure fluctuation at the superficial gas velocity of 0.4 m/s were investigated using cross sectional mean, standard deviation, power spectral density and multi-scale wavelet. The results indicated that the axial distribution curves of the time-averaged pressure at different radial positions were basically the same, and the bed pressure decreased more significantly along the axial direction in the dense phase region. According to the pressure fluctuation distribution, along the axial direction of the bed, it could be divided into grid region, bubble growing region, interface influence region and dilute phase region. With the increase of horizontal height, the maximum value of radial distribution of pressure fluctuation gradually developed from the side wall of the bed to the center, and finally presented an approximate horizontal distribution. The main frequency of pressure signal appeared in the range of 0-5 Hz, and its corresponding signal energy fraction increased first and then decreased along the axial or radial direction of the bed.
李勇征,徐 俊,钟思青等. 芳烃氨氧化双分布器流化床动态特性研究
I. 流化特性及压力波动信号分析[J]. 化学反应工程与工艺, 2022, 38(2): 143-153.
LI Yongzheng,XU Jun,ZHONG Siqing et al. Investigation on the Dynamic Characteristics of Double Distributor Fluidized Bed for Aromatics Ammoxidation
I. Fluidization Characteristics and Pressure Fluctuation Signal Analysis[J]. Chemical Reaction Engineering and Technology, 2022, 38(2): 143-153.
