TYPES OF CHOKING IN VERTICAL PNEUMATIC SYSTEMS

被引：112

作者：

BI, HT ^{[1
]}

GRACE, JR ^{[1
]}

ZHU, JX ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA,DEPT CHEM ENGN,VANCOUVER V6T 1Z4,BC,CANADA

来源：

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW | 1993年 / 19卷 / 06期

关键词：

CHOKING; INSTABILITY; FAST FLUIDIZATION; DILUTE-PHASE PNEUMATIC TRANSPORT; DENSE-PHASE PNEUMATIC TRANSPORT;

D O I：

10.1016/0301-9322(93)90079-A

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Choking is examined in terms of its definitions. Three choking initiation mechanisms are identified: type A (accumulative) choking occurs when solids start to accumulate at the bottom of the conveyor as the saturation gas carrying capacity is reached; type B (blower-/standpipe-induced) choking results from instabilities due to gas blower-conveyor or solids feeder-conveyor interactions where there is insufficient pressure or too limited solids feed capacity to provide the needed solids flow; and type C (classical) choking corresponds to a transition to severe slugging. Approaches for predicting the onset of each of these type of choking are recommended. Implications for regime transitions in fast fluidization are also identified.

引用

页码：1077 / 1092

页数：16

共 79 条

[1]

Bader R., 1988, PROC 2 INT C CIRCULA

[2]

BAI DR, 1987, CHEM REACT ENG TECHN, V3, P24

[3] SOME ASPECTS OF THE OPERATION AND DESIGN OF VERTICAL PNEUMATIC CONVEYING [J].

BANDROWSKI, J ;

KACZMARZYK, G .

POWDER TECHNOLOGY, 1981, 28 (01) :25-33

[4] STATIC INSTABILITY ANALYSIS OF CIRCULATING FLUIDIZED-BEDS AND CONCEPT OF HIGH-DENSITY RISERS [J].

BI, HT ;

ZHU, JX .

AICHE JOURNAL, 1993, 39 (08) :1272-1280

[5]

BI HT, 1991, AICHE A M LOS ANGELE

[6]

BI HT, 1988, THESIS TSINGHUA U BE

[7]

BI HT, 1991, AICHE ANN M LOS ANGE

[8] APPLICABILITY OF CHOKING CORRELATIONS FOR FAST-FLUID BED OPERATION [J].

BISWAS, J ;

LEUNG, LS .

POWDER TECHNOLOGY, 1987, 51 (02) :179-180

[9]

BRERETON CMH, 1992, CHEM ENG RES DES, V70, P246

[10]

BRERETON CMH, 1993, IN PRESS CIRCULATING, V4

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