583
Research on Dry Fluidization Separation Process from
Mesoscale Perspective
Dan Wang, Chenlong Duan, Yuemin Zhao, Chenyang Zhou, Liang Dong, Xibo Liu
Key Laboratory of Coal Processing and Efficient Clean Utilization of Ministry of Education, China University of Mining
and Technology, Xuzhou, China
School of Chemical Engineering &Technology, China University of Mining and Technology, Xuzhou, China
ABSTRACT: Coal plays a vital role in international energy security. Dry dense medium fluidized separation
promotes efficient and clean utilization of coal resources. Gas-solid separation fluidized bed, with gas bubbles
forming, coalescing, and fracturing on the mesoscale, is a multi-scale, nonlinear transient system. Therefore,
mesoscale studies aid in understanding bubble behavior and achieving steady-state regulation of coal separation.
We developed techniques and algorithms for bubble identification, as well as numerical models to predict bubble
behavior. For the regulation of mesoscale structure, detailed studies were carried out in terms of introducing
external energy.
Keywords: Gas-solid separation fluidized bed mesoscale structure bubble identification
INTRODUCTION
Coal has long been a crucial component of global energy
security, serving as a reliable and affordable source of power
for many countries. However, the traditional methods of
utilizing coal have raised concerns regarding environmental
pollution and efficient resource utilization. To address these
challenges, the development of advanced technologies and
techniques, such as dry dense medium fluidized separation,
has emerged as a promising solution for achieving efficient
and clean utilization of coal resources.
Dry dense medium fluidized separation involves the
use of finely ground solid particles as a medium to sepa-
rate coal from impurities based on their density differences.
This technique offers several advantages over conventional
coal separation methods, including higher efficiency, lower
water consumption, reduced environmental impact, and
increased product quality. To ensure its effective imple-
mentation, a thorough understanding of the underlying
mesoscale phenomena is essential. The gas-solid separation
fluidized bed is a key element in the dry dense medium
fluidized separation process. It involves the interaction
between the gas phase and the solid particles, where gas
bubbles play a crucial role in achieving efficient separation.
The behavior of gas bubbles in a fluidized bed is complex
and exhibits various phenomena such as formation, coales-
cence, and fracturing at the mesoscale. To achieve steady-
state regulation of coal separation, it is imperative to study
and comprehend the behavior of these bubbles
To tackle the challenges associated with bubble behavior
in the gas-solid separation fluidized bed, extensive research
and development have been carried out. Techniques and
algorithms have been developed for bubble identification,
allowing researchers to accurately analyze and track the
movement and characteristics of bubbles within the flu-
idized bed. This enables a better understanding of bubble
behavior and its impact on the separation process.
Research on Dry Fluidization Separation Process from
Mesoscale Perspective
Dan Wang, Chenlong Duan, Yuemin Zhao, Chenyang Zhou, Liang Dong, Xibo Liu
Key Laboratory of Coal Processing and Efficient Clean Utilization of Ministry of Education, China University of Mining
and Technology, Xuzhou, China
School of Chemical Engineering &Technology, China University of Mining and Technology, Xuzhou, China
ABSTRACT: Coal plays a vital role in international energy security. Dry dense medium fluidized separation
promotes efficient and clean utilization of coal resources. Gas-solid separation fluidized bed, with gas bubbles
forming, coalescing, and fracturing on the mesoscale, is a multi-scale, nonlinear transient system. Therefore,
mesoscale studies aid in understanding bubble behavior and achieving steady-state regulation of coal separation.
We developed techniques and algorithms for bubble identification, as well as numerical models to predict bubble
behavior. For the regulation of mesoscale structure, detailed studies were carried out in terms of introducing
external energy.
Keywords: Gas-solid separation fluidized bed mesoscale structure bubble identification
INTRODUCTION
Coal has long been a crucial component of global energy
security, serving as a reliable and affordable source of power
for many countries. However, the traditional methods of
utilizing coal have raised concerns regarding environmental
pollution and efficient resource utilization. To address these
challenges, the development of advanced technologies and
techniques, such as dry dense medium fluidized separation,
has emerged as a promising solution for achieving efficient
and clean utilization of coal resources.
Dry dense medium fluidized separation involves the
use of finely ground solid particles as a medium to sepa-
rate coal from impurities based on their density differences.
This technique offers several advantages over conventional
coal separation methods, including higher efficiency, lower
water consumption, reduced environmental impact, and
increased product quality. To ensure its effective imple-
mentation, a thorough understanding of the underlying
mesoscale phenomena is essential. The gas-solid separation
fluidized bed is a key element in the dry dense medium
fluidized separation process. It involves the interaction
between the gas phase and the solid particles, where gas
bubbles play a crucial role in achieving efficient separation.
The behavior of gas bubbles in a fluidized bed is complex
and exhibits various phenomena such as formation, coales-
cence, and fracturing at the mesoscale. To achieve steady-
state regulation of coal separation, it is imperative to study
and comprehend the behavior of these bubbles
To tackle the challenges associated with bubble behavior
in the gas-solid separation fluidized bed, extensive research
and development have been carried out. Techniques and
algorithms have been developed for bubble identification,
allowing researchers to accurately analyze and track the
movement and characteristics of bubbles within the flu-
idized bed. This enables a better understanding of bubble
behavior and its impact on the separation process.