Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 12, pp. 2195−2201.
Pleiades Publishing, Ltd., 2011.
Original Russian Text
N.A. Voinov, S.A. Lednik, 2011, published in Khimicheskaya Promyshlennost’, 2011, Vol. 88, No. 5, pp. 250−256.
PROCESSES AND DEVICES
OF CHEMICAL MANUFACTURES
Hydrodynamics and Mass Transfer on a Stage with Proﬁ led
N. A. Voinov and S. A. Lednik
Siberian State Technological University, Krasnoyarsk, Russia
Received March 12, 2011
Abstract—The results of studies of ﬂ uid ﬂ ow and mass transfer were reported in the vortex contact stages with
proﬁ led tangential channels. We obtained dependences for determining the hydraulic resistance, gas content,
interface, and mass-transfer coefﬁ cient.
Vortex contact devices are used in the column
equipment for heat mass transfer processes in
distillation, absorption, puriﬁ cation of gases. However,
the improvement of the considered devices to improve
their performance is hampered by not enough study of
the processes taking place in a stage. The contact stages
shown in Fig. 1 are of great interest to create a vortex
apparatus for high-performance relative to liquid, since
they allow easy providing the required drain perimeter
and cross section of ﬂ ows and do not form a stagnant
The study of the contact stages was carried out in
a system air–water. The gas ﬂ ow varied from 17 to 92
and is measured by a normal diaphragm. The
range of investigated temperatures of liquid and gas
was from 10 to 60°C; the liquid density was from 780
to 1000 kg m
, the dynamic viscosity of the liquid was
(0.7–1) × 10
Pa s. The pressure drop in the stage was
measured by a differential pressure gauge. The diameter
of the contact stage was D
= 280–300 mm; the diameter
of a swirler, D
= 110 mm; width and height of the
channel for the passage of gas are listed in the table.
A mean surface diameter of gas bubbles was
calculated based on photographs of gas–liquid layer by
The gas fraction in the liquid volume was determined
Fig. 1. Scheme of contact steps: (a) a single element, (b) a multi-element. (1) body, (2) horizontal partition, (3) swirler, (4) central ﬂ ow,
(5) external ﬂ ow, (6) additional swirler; (D
) diameter of the stage, (D
) diameter of the swirler; (h) height of the swirler channel; (S)
least width of swirler channel; (n) number of channels.