Measurement of residence time distribution of liquid phase in an industrial-scale continuous pulp digester using radiotracer technique

被引：12

作者：

Sheoran, Meenakshi ^{[1
]}

Goswami, Sunil ^{[2
]}

Pant, Harish J. ^{[2
]}

Biswal, Jayashree ^{[2
]}

Sharma, Vijay K. ^{[2
]}

Chandra, Avinash ^{[1
]}

Bhunia, Haripada ^{[1
]}

Bajpai, Pramod K. ^{[1
]}

Rao, S. Madhukar ^{[3
]}

Dash, A. ^{[2
]}

机构：

[1] Thapar Univ, Dept Chem Engn, Patiala 147004, Punjab, India

[2] Bhabha Atom Res Ctr, Isotope Prod & Applicat Div, Bombay 400085, Maharashtra, India

[3] Satia Ind Ltd, Sri Muktsar Sahib 152101, Punjab, India

来源：

APPLIED RADIATION AND ISOTOPES | 2016年 / 111卷

关键词：

Pulp digester; Radiotracer; Bromine-82; Residence time distribution; Mean residence time; Plug flow component; Axial dispersion model; Tanks-in-series with back-mixing model; MODEL; FLOW;

D O I：

10.1016/j.apradiso.2016.01.025

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of radiotracer experiments was carried out to measure residence time distribution (RTD) of liquid phase (alkali) in an industrial-scale continuous pulp digester in a paper industry in India. Bromine 82 as ammonium bromide was used as a radiotracer. Experiments were carried out at different biomass and white liquor flow rates. The measured RTD data were treated and mean residence times in individual digester tubes as well in the whole digester were determined. The RTD was also analyzed to identify flow abnormalities and investigate flow dynamics of the liquid phase in the pulp digester. Flow channeling was observed in the first section (tube 1) of the digester. Both axial dispersion and tanks-in-series with backmixing models preceded with a plug flow component were used to simulate the measured RTD and quantify the degree of axial mixing. Based on the study, optimum conditions for operating the digester were proposed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：10 / 17

页数：8

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