Hydrodynamics of Gas–Liquid
Two-Phase Flow in the Reverse Spray
Washing Process
Xiao-long Li, Ting-an Zhang, Yan Liu, Gui-li Liu, and Fang Dong
Abstract The efficient separation of fine particles from industrial flue gas is still a
challenging task. Reverse spray washing technology is gradually used in dust removal
due to its advantages of simple structure and large interphase contacting area. In
this paper, the lab-scale reverse spray washing device was established. The changes
of gas–liquid two-phase flow pattern, pressure drop, and structure characteristics
under different operating conditions were studied. It was found that four types of
flow regimes (hollow tapered, foaming, annular, and column types) will form. The
foaming type has fast surface renewal speed and large contacting area, which is
more conducive to the removal of fine particles in the flue gas. The operation and
performance diagram of the nozzle was drawn. The formation of different flow
patterns can be controlled by controlling the ratio of liquid to gas and the axial
and tangential liquid flow ratio of the nozzle.
Keywords Hydrodynamics · Flow regimes · Reverse spray · Turbulent flow ·
Optimization
X. Li · T. Zhang (B) · Y. Liu · G. Liu · F. Dong
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, Ministry of Education,
School of Metallurgy, Northeastern University, Shenyang, Liaoning 110819, China
e-mail: zta2000@163.net
X. Li
e-mail: lixiaolong1992vip@163.com
Y. Liu
e-mail: liuyan@smm.neu.edu.cn
G. Liu
e-mail: 2213297043@qq.com
F. Dong
e-mail: 710189995@qq.com
© The Minerals, Metals & Materials Society 2021
A. A. Baba et al. (eds.), Energy Technology 2021, The Minerals, Metals
& Materials Series, https://doi.org/10.1007/978-3-030-65257-9_7
61
Two-Phase Flow in the Reverse Spray
Washing Process
Xiao-long Li, Ting-an Zhang, Yan Liu, Gui-li Liu, and Fang Dong
Abstract The efficient separation of fine particles from industrial flue gas is still a
challenging task. Reverse spray washing technology is gradually used in dust removal
due to its advantages of simple structure and large interphase contacting area. In
this paper, the lab-scale reverse spray washing device was established. The changes
of gas–liquid two-phase flow pattern, pressure drop, and structure characteristics
under different operating conditions were studied. It was found that four types of
flow regimes (hollow tapered, foaming, annular, and column types) will form. The
foaming type has fast surface renewal speed and large contacting area, which is
more conducive to the removal of fine particles in the flue gas. The operation and
performance diagram of the nozzle was drawn. The formation of different flow
patterns can be controlled by controlling the ratio of liquid to gas and the axial
and tangential liquid flow ratio of the nozzle.
Keywords Hydrodynamics · Flow regimes · Reverse spray · Turbulent flow ·
Optimization
X. Li · T. Zhang (B) · Y. Liu · G. Liu · F. Dong
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, Ministry of Education,
School of Metallurgy, Northeastern University, Shenyang, Liaoning 110819, China
e-mail: zta2000@163.net
X. Li
e-mail: lixiaolong1992vip@163.com
Y. Liu
e-mail: liuyan@smm.neu.edu.cn
G. Liu
e-mail: 2213297043@qq.com
F. Dong
e-mail: 710189995@qq.com
© The Minerals, Metals & Materials Society 2021
A. A. Baba et al. (eds.), Energy Technology 2021, The Minerals, Metals
& Materials Series, https://doi.org/10.1007/978-3-030-65257-9_7
61