柱型水力旋流器筛分软木浆的评价

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柱型水力旋流器筛分软木浆的评价

卢晓江^a; 刘世杰^b

^aDepartment of Process Equipment, Tianjin University of Science and Technology, Tianjin 300222, China
^b Department of Chemical and Materials Engineering, University of Alberta, Edmonton TG6 2G6, Canada

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-08-28 发布日期:2006-08-28
通讯作者: 卢晓江

Evaluation of Fractionation of Softwood Pulp in a Cylindrical Hydrocyclone

LUXiaojiang^a; LIUShijie^b

^a Department of Process Equipment, Tianjin University of Science and Technology, Tianjin 300222, China
^b Department of Chemical and Materials Engineering, University of Alberta, Edmonton TG6 2G6, Canada

Received:1900-01-01 Revised:1900-01-01 Online:2006-08-28 Published:2006-08-28
Contact: LU Xiaojiang

摘要/Abstract

摘要： Pulp fiber length characterization is addressed in this article. It is suggested that the proposed separation index H(L) is a viable index to the fiber fractionation performance for evaluating hydrocyclones. Fractionation of softwood (coniferous wood) bleached chemithermomechanical pulp (BCTMP) fiber was carried out with a cylindrical hydrocyclone. Pulp fiber length characteristics in different streams were examined using the fiber quality analyzer (FQA), and the cumulative fiber length fraction, the fiber length fraction density function and the separation index H(L) for different streams were obtained. It is found that H(L) is very useful for characterizing the fiber fractionation performance by indicating the separation capacity of hydrocyclone for individual subgroup of fibers in different streams under different operation conditions. Results of H(L) show that there exists a critical fiber length. A higher proportion of fibers longer than the critical fiber length is in the overflow stream, and a higher proportion of fibers shorter than the critical fiber length in the underflow stream. The data obtained from FQA suggest that the split ratio is the most significant parameter for fiber fractionation performance, which is the best when the split ratio is in the range between 0.14 and 0.2. The effect of feed rate on fiber fractionation performance is weak.

关键词: evaluation;fiber;fractionation;hydrocyclone

Abstract: Pulp fiber length characterization is addressed in this article. It is suggested that the proposed separation index H(L) is a viable index to the fiber fractionation performance for evaluating hydrocyclones. Fractionation of softwood (coniferous wood) bleached chemithermomechanical pulp (BCTMP) fiber was carried out with a cylindrical hydrocyclone. Pulp fiber length characteristics in different streams were examined using the fiber quality analyzer (FQA), and the cumulative fiber length fraction, the fiber length fraction density function and the separation index H(L) for different streams were obtained. It is found that H(L) is very useful for characterizing the fiber fractionation performance by indicating the separation capacity of hydrocyclone for individual subgroup of fibers in different streams under different operation conditions. Results of H(L) show that there exists a critical fiber length. A higher proportion of fibers longer than the critical fiber length is in the overflow stream, and a higher proportion of fibers shorter than the critical fiber length in the underflow stream. The data obtained from FQA suggest that the split ratio is the most significant parameter for fiber fractionation performance, which is the best when the split ratio is in the range between 0.14 and 0.2. The effect of feed rate on fiber fractionation performance is weak.

Key words: evaluation, fiber, fractionation, hydrocyclone

卢晓江, 刘世杰. 柱型水力旋流器筛分软木浆的评价[J]. CIESC Journal.

LUXiaojiang, LIUShijie. Evaluation of Fractionation of Softwood Pulp in a Cylindrical Hydrocyclone[J]. .

参考文献

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柱型水力旋流器筛分软木浆的评价

Evaluation of Fractionation of Softwood Pulp in a Cylindrical Hydrocyclone

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