Enhance your baghouse efficiency with Venturi technology! Discover the power of Venturi in pulse jet bag filters. 🚀 Find out how it creates reduced pressure and improves cleaning shock waves. For further details, don't hesitate to contact us: sales@alimex.org www.alimexgroup.com

1. Advantage and disadvantage of venturi
VOLUME #8 .
Introduction
The cleaning cycle is the most
important part of the dust
collector because it controls
efficiency and media life. In
order to clean a row of bags in
a reverse pulse jet baghouse
first the flow of filtered air must
be momentarily stopped and
then back flushed or “induce”
air to knock the dust cake off
the outside of the filter media.
A device called Venturi, shaped like a converging-diverging
nozzle, is utilized in some compressed air baghouses by
inserting it through the top of the bag openings in the tube
sheet to enhance the efficiency of compressed air blasts.
The concept behind incorporating Venturi into the
conventional pulse jet bag filter is to generate an area of
considerably reduced pressure in the venturi throat by using
the injected air pulse, which aspirates a substantial amount of
purified gas from the outlet plenum to supplement the directly
injected cleaning pulse. The venturi operates as a jet pump,
increasing the effectiveness of the cleaning shock wave.
However, the significance of venturis is open to debate.

2. Advantages and disadvantages
The venturi has been linked to reverse pulsejet
baghouse dust collectors since the 1950s and is
now the standard design for the reverse-jet
cleaning system. Although the reversejet with
venturi offers some benefits compared to reverse-
air or mechanical-shaker cleaning systems, there
are often overlooked drawbacks to the venturi itself.
In contrast to the significant number of moving
parts in reverse-air and mechanical-shaker
systems, the reverse-jet cleaning system with
venturi enables continuous cleaning of the dust
collector with almost no moving parts.
The drawbacks of the venturi-based cleaning
system exceed its benefits. As dust accumulates in
the media pores, it clogs them, reducing the
amount of aspirated air and the cleaning system's
performance. In this system, using a venturi, the
top 18 inches of the bag cannot be utilized for
repetitive cleaning, which amounts to almost 20%
of the media in an eight-foot-long bag, as illustrated
in the figure. Consequently, the air-to-cloth ratios
for this type of cleaning system must be reduced.
FOR FURTHER DETAILS, DO NOT
HESITATE TO CONTACT US:
sales@alimex.org
www.alimexgroup.com
+20224177821 +24177894
+20 127 5177188
1 EL Marwa Buildings Ahmed Taysir
St. Heliopolis, Cairo Egypt.