Incipient Condition of Hang-up in a Long Standpipe-Hopper System for Geldart-D Powders

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Incipient Condition of Hang-up in a Long Standpipe-Hopper System for Geldart-D Powders

JING Shan^a; CAI Guobin^b; HUANG Sheng^b; WANG Jinfu^b; JIN Yong^b

^a Institute of Nuclear Technology, Tsinghua University, P. O. Box 1021, Beijing 102201,
China
^b Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:1900-01-01 Revised:1900-01-01 Online:2001-09-28 Published:2001-09-28
Contact: JING Shan

Geldart-D 类颗粒在长立管-漏斗系统悬料的初始条件

景山^a; 蔡国斌^b; 黄晟^b; 王金福^b; 金涌^b

^a Institute of Nuclear Technology, Tsinghua University, P. O. Box 1021, Beijing 102201,
China
^b Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

通讯作者: 景山

Abstract

Abstract: The incipient condition of hang-up for three Geldart-D powders has been experimentally
studied in a 21 m long standpipe hopper system. Experimental results show that the pressure
gradient for hang-up to occur is independent of the materials height in the hopper and the
diameter of orifice and equals to (dpw/dl)s, which can be predicted by Eq. (7). While the
corresponding gas velocity in the standpipe equals to the incipient fluidized velocity of
particles at the high pressure and can be predicted by Kwauk’s equation.

Key words: hang-up regime, standpipe-hopper system, Geldart-D powder

摘要： The incipient condition of hang-up for three Geldart-D powders has been experimentally
studied in a 21 m long standpipe hopper system. Experimental results show that the pressure
gradient for hang-up to occur is independent of the materials height in the hopper and the
diameter of orifice and equals to (dpw/dl)s, which can be predicted by Eq. (7). While the
corresponding gas velocity in the standpipe equals to the incipient fluidized velocity of
particles at the high pressure and can be predicted by Kwauk’s equation.

关键词: hang-up regime;standpipe-hopper system;Geldart-D powder

JING Shan, CAI Guobin, HUANG Sheng, WANG Jinfu, JIN Yong. Incipient Condition of Hang-up in a Long Standpipe-Hopper System for Geldart-D Powders[J]. .

景山, 蔡国斌, 黄晟, 王金福, 金涌. Geldart-D 类颗粒在长立管-漏斗系统悬料的初始条件[J]. CIESC Journal.