ISSN 1070-4272, Russian Journal of Applied Chemistry, 2007, Vol. 80, No. 8, pp. 1369!1372. + Pleiades Publishing, Ltd., 2007.
Original Russian Text + I.A. Lyutarevich, V.A. Markov, 2007, published in Zhurnal Prikladnoi Khimii, 2007, Vol. 80, No. 8, pp. 1330!1333.
PROCESSES AND EQUIPMENT
OF CHEMICAL INDUSTRY
Hydrodynamics and Mass Exchange in a Rotary Apparatus
I. A. Lyutarevich and V. A. Markov
Belarussian State Technological University, Minsk, Belarus
Received February 9, 2007
Abstract-Results of an experimental study of carbon dioxide desorption from water in a rotary apparatus
are presented. The manner in which the volume mass-transfer coefficient in the fluid phase and the efficiency
of mass transfer vary with a number of mode parameters was determined. Analytical dependences for cal-
culating the hydraulic resistance and the rotor drive power were derived. These dependences will allow
development of a procedure for engineering calculations of apparatus of this type.
The quality of products and the ecological param-
eters of a process (primarily, the content of impurities
in fluid and gaseous industrial wastes) are important
factors associated with improvement of technological
processes. Of particular importance is carrying out
effective mass exchange between flows at minimum
A commonly accepted promising way to solve this
problem is use of rotary apparatus with phase interac-
tion in a swirling flow for mass-exchange processes.
Analysis of published evidence  shows that
the efficiency of mass transfer in apparatus with ex-
ternal energy supply exceeds that for contact devices
with the conventional types of phase interaction in
gas3fluid systems. This favors a pronounced decrease
in the apparatus dimensions.
Thus, rotary dispersion-film apparatus, in which
the phase interaction occurs in the zone of intensive
dispersion of a fluid by a spraying device and phases
subsequently come in contact in the zone of a film-
type flow of a fluid, should be distinguished among
surface-type, spraying, bubbling, and rotary apparatus.
In addition, use of a swirling flow in apparatus of
this kind can intensify the processes performed and
markedly raise the gas load at a comparatively low
hydraulic resistance of an apparatus.
We developed a two-stage design of a rotary dis-
persion-film apparatus for interaction of gas3fluid sys-
tems in a swirling flow (Fig. 1). It includes a cylin-
drical case 1, tangential inlet 2 and outlet 3 for
the gas, and fluid-dispersing devices 4 fixed on shaft 5
driven by electric motor 6. The frequency control unit
is used to set the required shaft rotation rate. The dis-
persing device has the form of a hollow perforated
cylinder with flanges preventing fluid overflow.
Fig. 1. Schematic of the experimental installation: (1) case,
(2) inlet pipe, (3) outlet pipe, (4) dispersing unit, (5) shaft,
(6) electric motor, (7) frequency control unit, (8) fluid
supply pipe, (9) overflow unit, (10) fluid discharge pipe,
(11) impeller, (12) blade swirler.