Russian Journal of Applied Chemistry, 2007, Vol. 80, No. 11, pp. 2005
Pleiades Publishing, Ltd., 2007.
Original Russian Text ©
A.S. Pushnov, M.G. Berengarten, A.M. Kagan, A.S. Ryabushenko, 2007, published in Khimicheskaya Promyshlennost’, 2007,
Vol. 84, No. 5, pp. 249
PROCESSES AND DEVICES
OF CHEMICAL MANUFACTURES
Helicoid-Structural Packing with Varied Stacking Geometry
A. S. Pushnov, M. G. Berengarten, A. M. Kagan, and A. S. Ryabushenko
Mendeleev Chemical Society, Moscow Division, Moscow, Russia
Vedeneev Research Institute of Hydraulic Engineering, Moscow, Russia
Received April 24, 2007
Abstract—Due to obsolescence of basic technological equipment of fan-type cooling towers in the enterprises of
chemical complex built in 1980 and earlier the actual problem is their reconstruction using new technological
solutions and developments aimed at the increase in efficiency of the process of evaporation cooling.
Due to obsolescence of basic technological equipment
of fan-type cooling towers in the enterprises of chemical
complex built in 1980 and earlier the actual problem is
their reconstruction using new technological solutions
and developments aimed at the increase efficiency of the
process of evaporation cooling.
In  has been proposed a regular polymer packing
constructed of four-blade helicoid elements turbulizing
gas and liquid flow. The blades were stacked in horizontal
rows turned by right angle in neighboring rows. Further
development of this approach was shown in  publishing
the results of examination of modernized constructions
of helicoid-structural packing of PN-2D type made of
Construction of helicoid-structural packing with
varied geometry of stacking the individual blades in
a block allows to recommend such packing for providing
a given profile of the air flow rate along the transverse
section of trickling space of cooling tower .
Programming the profile of rates in a cooling tower using
the proposed prospective construction consisting of
horizontal helicoids is performed keeping unchanged
block height only by varying geometry of stacking and
distance between the helicoid blades. This results in
changing living section and hence in hydraulic resistance
of the packing blocks . The packing PN-2D allows
varying the stacking pitch in the range from 1 to 3
diameters of the helicoid.
General view of the packing of PN-2D type with
different modes of stacking geometry is shown in Fig. 1.
The following modes of stacking geometry are possible:
• PN-2D kd – unstaggered (corridor) stacking,
• PN-2D ch – staggered (chess type) stacking,
• PN-2D kk – slant canal.
In this work we present results of air-thermal
examination of helicoid-structural packing PN-2D with
a predetermined stacking geometry of elements in
The experiments were carried out under identical
conditions, on the installations in the Vedeneev Research
Institute of Hydraulic Engineering and Moscow State
University of Engineering Ecology according to the
procedure described in .
Plots in Figs. 2–4 show experimental data on the
dependence of degree of cooling water in cooling tower,
Δt, on the value of specific liquid rate, q
, obtained on
Fig. 1. General view of blocks of PN-2D packing with different
modes of stacking of its elements, the helicoids: (a) PN-2D
kd – unstaggered (corridor) stacking, (b) PN-2D ch – staggered
(chess type) stacking, (c) PN-2D kk – slant canal, (d) general
view of separate packing element.