Comparative Study of Two Identical Industrial Digesters Using Radiotracer-Based Residence Time Distribution Measurement,Chemical Engineering & Technology

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Comparative Study of Two Identical Industrial Digesters Using Radiotracer-Based Residence Time Distribution Measurement
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2022-01-05 , DOI: 10.1002/ceat.202100429
Meenakshi Sheoran ₁ , Avinash Chandra ₁ , Arvind Kumar Gautam ₂ , Raj Kumar Arya ₃ , Haripada Bhunia ₁ , Harish J. Pant ₄

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Radiotracer-based residence time distribution (RTD) measurements were performed for two identical wheat straw pulping digesters to evaluate and compare their performances. The radiotracer technetium (^99mTc) as sodium pertechnetate was used to follow the liquid phase inside the digester. The product quality of both digesters was not identical for similar sets of operating conditions. Temperature, pressure, and mass flow rates were the influencing parameters, and the experimental and theoretical mean residence time (MRT) were compared. A significant amount of flow abnormalities was observed in the second digester as compared to the first one, including channeling, dead volume, scaling, and bypassing. The axial dispersion model and tank in series with the back-mixing model were suitable for modeling the obtained RTD data.

中文翻译：

使用基于放射性示踪剂的停留时间分布测量的两个相同的工业蒸煮器的比较研究

对两个相同的麦秸制浆蒸煮器进行基于放射性示踪剂的停留时间分布 (RTD) 测量，以评估和比较它们的性能。放射性示踪剂锝（^99mTc) 作为高锝酸钠用于跟踪蒸煮器内的液相。对于类似的操作条件，两个蒸煮器的产品质量并不相同。温度、压力和质量流量是影响参数，并比较了实验和理论平均停留时间 (MRT)。与第一个消化池相比，在第二个消化池中观察到大量流动异常，包括通道、死体积、结垢和旁路。轴向扩散模型和与反混模型串联的罐适用于对获得的 RTD 数据进行建模。

更新日期：2022-01-05

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