Investigation of the Operational Principle and Flow Analysis of a Newly Developed Dry Separator
Mineral product, waste concrete (fine aggregates),
waste in the optical field, industry, and construction employ separators
to separate solids and classify them according to their size. Various
sorting machines are used in the industrial field such as those operating
under electrical properties, centrifugal force, wind power, vibration,
and magnetic force. Study on separators has been carried out to
contribute to the environmental industry. In this study, we perform
CFD analysis for understanding the basic mechanism of the separation
of waste concrete (fine aggregate) particles from air with a machine
built with a rotor with blades. In CFD, we first performed
two-dimensional particle tracking for various particle sizes for the
model with 1 degree, 1.5 degree, and 2 degree angle between each
blade to verify the boundary conditions and the method of rotating
domain method to be used in 3D. Then we developed 3D numerical
model with ANSYS CFX to calculate the air flow and track the
particles. We judged the capability of particle separation for given size
by counting the number of particles escaping from the domain toward
the exit among 10 particles issued at the inlet. We confirm that
particles experience stagnant behavior near the exit of the rotating
blades where the centrifugal force acting on the particles is in balance
with the air drag force. It was also found that the minimum particle
size that can be separated by the machine with the rotor is determined
by its capability to stay at the outlet of the rotor channels.
[1] 2013, Ministry of Environment, Korea, “Generation and processing status
of national waste (201 2year)”, pp. 10~30.
[2] 2014, South Korea Construction Technology Research Institute,
“Activation scheme research of circulation aggregate”, pp. 17~139.
[3] 2013, G.H. Lim, “An experimental study on the fundamental properties
and e7durability of concrete using recycled aggregate of wind separation
type.” (in Korea) MS Thesis, Dept. of Architecture Engineering, Graduate
School of Industry, Hanbat National University.
[4] 2012, D. H. Lee, “A study of selection methods for separation system of
wastes.” (in Korea) MS Thesis, Dept. Environment Engineering,
Graduate School of Industry, Seoul National University of Science and
Technology.
[5] 2011, T.A. Mekhail, W.A. Aissa, S.A. Hassanein, O. Hamdy, “CFD
simulation of dilute gas-solid flow in 90° square bend.” Energy and
Power Engineering, Vol. 3, pp. 246~252.
[6] ANSYS CFX, Solver Modeling guide released 15, ANSYS Inc., (2013)
pp. 285~286
[1] 2013, Ministry of Environment, Korea, “Generation and processing status
of national waste (201 2year)”, pp. 10~30.
[2] 2014, South Korea Construction Technology Research Institute,
“Activation scheme research of circulation aggregate”, pp. 17~139.
[3] 2013, G.H. Lim, “An experimental study on the fundamental properties
and e7durability of concrete using recycled aggregate of wind separation
type.” (in Korea) MS Thesis, Dept. of Architecture Engineering, Graduate
School of Industry, Hanbat National University.
[4] 2012, D. H. Lee, “A study of selection methods for separation system of
wastes.” (in Korea) MS Thesis, Dept. Environment Engineering,
Graduate School of Industry, Seoul National University of Science and
Technology.
[5] 2011, T.A. Mekhail, W.A. Aissa, S.A. Hassanein, O. Hamdy, “CFD
simulation of dilute gas-solid flow in 90° square bend.” Energy and
Power Engineering, Vol. 3, pp. 246~252.
[6] ANSYS CFX, Solver Modeling guide released 15, ANSYS Inc., (2013)
pp. 285~286
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:71717", author = "Sung Uk Park and Young Su Kang and Sangmo Kang and Yong Kweon Suh", title = "Investigation of the Operational Principle and Flow Analysis of a Newly Developed Dry Separator", abstract = "Mineral product, waste concrete (fine aggregates),
waste in the optical field, industry, and construction employ separators
to separate solids and classify them according to their size. Various
sorting machines are used in the industrial field such as those operating
under electrical properties, centrifugal force, wind power, vibration,
and magnetic force. Study on separators has been carried out to
contribute to the environmental industry. In this study, we perform
CFD analysis for understanding the basic mechanism of the separation
of waste concrete (fine aggregate) particles from air with a machine
built with a rotor with blades. In CFD, we first performed
two-dimensional particle tracking for various particle sizes for the
model with 1 degree, 1.5 degree, and 2 degree angle between each
blade to verify the boundary conditions and the method of rotating
domain method to be used in 3D. Then we developed 3D numerical
model with ANSYS CFX to calculate the air flow and track the
particles. We judged the capability of particle separation for given size
by counting the number of particles escaping from the domain toward
the exit among 10 particles issued at the inlet. We confirm that
particles experience stagnant behavior near the exit of the rotating
blades where the centrifugal force acting on the particles is in balance
with the air drag force. It was also found that the minimum particle
size that can be separated by the machine with the rotor is determined
by its capability to stay at the outlet of the rotor channels.", keywords = "Environmental industry, Separator, CFD, Fine
aggregate.", volume = "9", number = "12", pages = "2138-4", }