Russian Journal of Applied Chemistry, 2010, Vol. 83, No. 3, pp. 569−571.
Pleiades Publishing, Ltd., 2010.
Original Russian Text
A.S. Pushnov, M.G. Lagutkin, E.N. Petrashova, 2010, published in Khimicheskaya Promyshlennost’, 2010, Vol. 87, No. 1, pp. 34−36.
MODELING AND CALCULATION
OF TECHNOLOGICAL PROCESSES
New Technique of Packaging Regular Nozzles
in the Heat and Mass Transfer
A. S. Pushnov, M. G. Lagutkin, and E. N. Petrashova
Мoscow State University of Environmental Engineering, Moscow, Russia
Received December 18, 2009
Abstract—A new technique of packaging regular ring nozzles was demostrated. This technique by spacing from
each other of adjacent nozzle elements insures an essential increase in an area of a phase contact preventing
formation of dead zones thereby improving the heat and mass exchange by 30%.
The column apparatus for the rectiﬁ cation, absorption,
and heat transfer by blending heat carrying agents
are widely used in different branch of the chemical
manufactures. The contact devices of these columns
are mainly divided into two types: tray columns and
packed ones. The packed columns are used in small
scale manufactures and if a ﬂ uid retention in a column
and pressure drop should be small. Owing to developing
more efﬁ cient nozzles the packed column became more
demanding, nowadays they are applied also to large scale
manufactures . The nozzles being used for the packed
column should be met the following requirements: they
must possess a large speciﬁ c surface area and a large
free volume. They should be good wettable, resistant to
be clogged, mechanically strong. In addition, the nozzle
should provide little resistance to gas ﬂ ow, evenly
distribute the ﬂ uid and have a corrosion resistance in
correspondent media . In order to reduce pressure
on a supporting device and walls, a layer of the nozzle
should be of a large porosity.
At the present time for packing the columns Raschig
rings of different materials are widely used.
Besides, industrial nozzles having a number of
advances compare to Raschig rings were developed and
suggested, such as Pall rings, GIAP-H3 [3, 4]. Currently
along with the regular nozzles (with ordered packing)
irregular ones (with arbitrary packing) are used in
industry (Fig. 2).
As can be seen from Fig. 2, in the case of the irregular
packing orientation of a majority of the nozzle elements
near the walls is coaxial relative to the walls of the
column and that, in turn, promotes formation of cross-
Fig. 1. A regular ring nozzle.
Fig. 2. A column with arbinrary nozzle packing.