Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 4, pp. 715−718.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
A.V. Klimov, V.V. Serdyuk, L.A. Ashkinazi, 2008, published in Khimicheskaya Promyshlennost’, 2008, Vol. 85, No. 7, pp. 347−352.
PROCESSES AND DEVICES
OF CHEMICAL MANUFACTURES
Investigation of Properties of Polymeric Filters “APRIS”
in the Case of Air Puriﬁ cation:
I. Filtration with a Flat Bafﬂ e
A. V. Klimov, V. V. Serdyuk, and L. A. Ashkinazi
ZAO “Academy of Applied Studies”, St. Petersburg, Russia
Received September 12, 2008
The filters “APRIS” applied to gas purification
including the hydrogen from mechanical impurities.
We carried out test benches of these ﬁ lters for obtaining
dependencies of an inﬂ uence of such operational factors
as ﬂ ow, pressure, and density of the puriﬁ ed gas on
a resistance of the ﬁ lter cell “APRIS” for the following
computation at designing cleaning arrangements.
The tests were conducted on the bench including
an air balloon, a reduction gear, a body with ﬁ lter cell,
rheometer for measuring the volume air ﬂ ow in a range
of 5−25 l min
, a manometer with a scale from 0 to
25 kg cm
and an accuracy class of 0.6 for measuring
a system pressure, an aqueous U-shaped manometer
attached at the inlet and outlet of the ﬁ lter cell body
with a division value of 1 mm H
O and with a range of
the pressure drop measurement up to 2 mm H
two control cocks.
The ﬁ lter cell was of a cylinder shape, 19 mm diameter
and 45 mm height. Air passes through the ﬁ lter cell along
an axial direction.
The measurements of the pressure drop of the pipe
section without the ﬁ lter cell and including the ﬁ lter cell
under the ﬁ xed pressures: 1, 2, 4, 6, and 8 kg cm
the air ﬂ ow: 5, 10, 15, 20, and 25 l min
The ﬁ lter cell resistance computed by a dif-ference
between the pressure drop of the pipe section without
the ﬁ lter cell and the pressure drop of the same section
with the ﬁ lter cell at the same values of the pressure
and the ﬂ ow.
The Fig. 1 shows that the air resistance both of the
pipe section and of the ﬁ lter cell decreases in the course
of growth of the pressure in the system at the ﬁ xed volume
ﬂ ow. It can be understood through the air compressibility:
the air density increases along with the pressure growth that
leads to increase in the air velocity at a ﬁ xed mass ﬂ ow.
The effect of the resistance decrease at the further
pressure growth diminished at the sufﬁ ciently high values
of the pressure. Curves for the pressures of 8 and
9 kg cm
practically coincide at the control pressure rise
up to 9 kg cm
in the pipe section with the ﬁ lter cell.
The dependences of the ﬁ lter cell resistance on the
system pressure (Fig. 2) well expresses the set out above.
A dependence of the resistance on the velocity of
the air passing through the ﬁ lter cell under the standard
conditions and not on the air volume ﬂ ow should be
reasonable considered. The air velocity in this case was
calculated by equation (1):
where W is air velocity, m s
; Q, the air volume ﬂ ow,
; S, the open ﬂ ow area, m
; Р, excess air pressure
in the system, bar.
The dependence of the ﬁ lter cell on the air ﬂ ow at the
various pressures in the system is depicted in Fig. 3.
Obviously in this case all these curves are arranged
with some deviations on the straight line that starts in an
origin of coordinates.
S (P + 1)