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化学反应工程与工艺
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芳烃氨氧化双分布器流化床动态特性研究 II. 双分布器影响区的压力波动规律
李勇征,徐 俊,钟思青,顾龙勤,杨为民
中国石油化工股份有限公司上海石油化工研究院,绿色化工与工业催化国家重点实验室,上海 201208
Investigation on the Dynamic Characteristics of Double Distributor Fluidized Bed for Aromatics Ammoxidation II. Pressure Fluctuation Law in the Region Affected by the Double Distributor
LI Yongzheng, XU Jun, ZHONG Siqing, GU Longqin, YANG Weimin
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Shanghai Research Institute of Petrochemical Technology, SINOPEC, Shanghai 201208, China
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摘要 在气固流化床冷模实验平台上,对双分布器影响区域内的压力信号进行了测定。采用压力时均值、标准偏差和功率谱密度等特征量分析了不同表观气速、静床高、上下分布器进气流量比以及双分布器间距等条件下的床层压力分布和压力波动特性。结果表明:随着表观气速或静床高的增加,压力波动有所增强,尤其是底部密相区表现更为明显;压力信号呈现低频脉动的特点,表观气速或静床高增大,压力波动主频略有减小,主频相对应能量明显增强;上下分布器的进气流量比和分布器间距对双分布器影响区压力波动影响显著,由气泡生长规律以及气泡尺寸等因素共同作用所决定。
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李勇征
徐 俊
钟思青
顾龙勤
杨为民
关键词 气固流化床双分布器进气流量比分布器间距压力波动    
Abstract:The pressure signal in the region affected by double distributor was measured on a cold mode test platform of gas-solid fluidized bed. Bed pressure distributions and pressure fluctuation characteristics at different superficial gas velocities, initial bed heights, gas flow ratios of double distributor, and distributor spacing were analyzed using time-averaged pressure, standard deviation and power spectrum density. The results showed that the pressure fluctuation increased with superficial gas velocity or initial bed height, especially in the dense phase zone at the bottom of the fluidized bed. The pressure signal was low-frequency pulsation. With the increase of superficial gas velocity or initial bed height, the principal frequency of pressure fluctuation decreased slightly but the signal energy corresponding to the principal frequency increased obviously. The gas flow ratio or spacing of the upper and lower distributors had a significant effect on the pressure fluctuation, which was determined by joint action of bubble growth law and bubble size.
Key wordsgas-solid fluidization bed    double distributor    gas flow ratio    distributor spacing    pressure fluctuation   
收稿日期: 2021-11-10     
作者简介: 李勇征(1986—),男,博士;杨为民(1966—),男,教授级高级工程师,通讯联系人。E-mail: yangwm.sshy@sinopec.com。
引用本文:   
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 II. 双分布器影响区的压力波动规律[J]. 化学反应工程与工艺, 2022, 38(4): 289-297.
LI Yongzheng,XU Jun,ZHONG Siqing et al. Investigation on the Dynamic Characteristics of Double Distributor Fluidized Bed for Aromatics Ammoxidation II. Pressure Fluctuation Law in the Region Affected by the Double Distributor[J]. Chemical Reaction Engineering and Technology, 2022, 38(4): 289-297.
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