(610b) Separation Characteristics in a Novel Gas-Liquid Vortex Separator

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novel multi-swirling arms gas-liquid vortex separator (GLVS) was designed in
order to improve the gas-liquid centrifugal separation process and realize the
high-efficiency separation. It can provide a new idea to design for large-scale
gas-liquid separator. The pressure drop characteristics are investigated in a
large scale cold-separator model, the mainly diameter of this separator is 500
mm, as shown in Figure 1. The static pressure drop between the inlet and outlet
was measured at different velocities of the swirling arm under pure air flow conditions,
as shown in Figure 2. The velocities of the swirling arm ranged from 5.65 to
16.95 m/s, which can cover the operating conditions of the industry gas liquid
separator. The experimental results show that the pressure drop and the velocity
of the swirling arm presence a square relationship, as shown in Figure 3. The
dimensionless standard deviation of the static pressure drop is maintained
within 2%. Furthermore, the total pressure drop ( top:2.0pt">)
includes three parts, i.e., loss in inlet friction (P₁), loss
in the separation space (P₂), and loss in outlet pipeline (P₃).
We found that the pressure drop occur in the separation space is the largest.
In addition, the three parts of pressure drop and the velocity head of the
swirling arm presence a linear relationship, as shown in Figure 4. A model
between the pressure drop of each part and the velocity head of the swirling
arm was then given. The resistance coefficient of this rig is 16, it has no
significant increase compared to common cyclone separators. The forecast equation
of the resistance coefficient was obtained based on the experimental of four similar
structures with different sizes. Compared to real resistance coefficient, the predicted
results error is less than 0.5%. color:black"> Then we proposed the separation characteristic of GLVS under the
gas-liquid mixture condition. We discovered the gas-liquid condition,
especially increase the liquid, has a little effect on pressure drop, as shown
in Figure 5. Figure 6 illustrates the results of separation efficiency
performed on different swirling arm velocities. We obtained the optimal
velocity of swirling arm is 12.4 m/s.

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Fig.1 Schematic diagram of the experimental apparatus

Fig.2 Fluctuation
of static pressure drop vs. recording time at different air flow rates

Fig.3 The static pressure drop vs. inlet gas flow rates

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layout-grid-mode:char;text-autospace:none"> 9.0pt;color:black">Fig.4 The relationship between segmental pressure drop and
velocity head of swirling arm

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layout-grid-mode:char;text-autospace:none"> 9.0pt;color:black">Fig.5 The relationship between pressure drop and velocity of
swirling arm

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layout-grid-mode:char;text-autospace:none"> 9.0pt;color:black">Fig.6 The separation efficiency vs. swirling arm velocity