DEVELOPMENT OF SELF-REGENERATING FILTERING SYSTEMS
WITH DECREASED HYDRAULIC RESISTANCE FOR ENERGY-SAVING
DUST COLLECTION IN PRODUCTION OF REFRACTORIES
Yu. V. Krasovitskii,
D. B. Troshchenko,
S. V. Éntin,
S. L. Kabargin,
D. A. Ermolychev,
B. G. Kolbeshkin,
M. N. Kuznetsova,
V. P. Dobrosotskii,
and G. V. Kol’tsov
Translated from Novye Ogneupory, No. 9, pp. 47 – 50, September, 2006.
Original article submitted February 27, 2006.
The kinetics of filtering dust-gas flows by rotating self-regenerating filter membranes with decreased hydrau
lic resistance for energy-saving highly efficient dust collection from process gases and aspiration emissions in
the production of refractories is considered. A nomogram is proposed for choosing regeneration parameters
for filter membranes, and the advantages and prospects of this dust-collecting method in the production of
refractories are formulated.
Dust components emitted into the atmosphere in the
course of production of refractories contain substantial
amounts of materials that have to be recycled in the techno-
logical process. The cost of activities intended to protect the
atmosphere from dust emissions at refractory works reaches
18% of the total capital investments [1, 2]. In this context, it
is especially important to develop self-regenerating struc
tures with decreased hydraulic resistance in order to achieve
energy-saving highly efficient dust collection from process
gases and aspiration emissions. The advantages of cylindri
cal granular filter layers with a small curvature radius makes
them rather promising for dust removal from gases in a cen
trifugal field [3, 4].
Theoretical and experimental studies have been carried
out to develop a steady hydrodynamic filtering regime,
which involves the specifics of resistance of rotating porous
bodies, as a dust-gas flow passes through them. We relied on
extensive information on separating heterogeneous gaseous
systems with a disperse solid phase in a centrifugal field
[5 – 7].
There are known original designs of self-regenerating ro
tary filters for separating dust-gas flows [8, 9]. Therefore, it
is interesting to estimate the effect of centrifugal force on
pressure difference ÄP in a centripetal motion of a dust-gas
flow. To derive a dependence describing the filtering process,
we assume here that the pressure difference observed as the
flow passes through the filter cake ÄP
is lower than the
pressure difference for a stationary element ÄP
by a value
determined by the effect of the centrifugal force on
The validity of equality (1) is obvious, considering that
are oppositely directed.
To determine P
, the elementary pressure developed
in the centrifugal field inside a coaxial cake element of a ra
dius R and thickness dR is calculated from the following the
is the density of the filter cake (dust) on the surface
of a rotating filter element; ù is the rotational speed.
After integrating equality (2) in the corresponding limits,
are the outer radii of the filter cake layer
and the filter membrane.
Refractories and Industrial Ceramics Vol. 47, No. 5, 2006
1083-4877/06/4705-0326 © 2006 Springer Science+Business Media, Inc.
Voronezh State Technological Academy, Russia; Semiluki Re
fractory Works, Russia; Voronezh Tel’man Railway Car Repair
Works, Russia; Voronezh Ceramic Works, Russia.