TVM termoventilmec News letter - 17 - Filters for chemical and pharmaceutical industry

1. 17 TVM newsletter April 2013 1/2
ENVIRONMENT TECHNOLOGY AND SOLUTIONS BY TVM MARKETING DEPARTMENT
Periodical of technical information on the state of the art within the field of safety and on the development of TVM termoventilmec Srl products
New Bag-Filter Unit
manufactured to be
applied in Chemical and
Pharmaceutical Industry
TVM termoventilmec srl, in the continuous research and
development of technological solutions for the suction and
filtration industry has developed a new range of bag filters,
designed, engineered and built to operate in the industrial chemical
and pharmaceutical sectors . This important result has been
achieved thanks to a new bag-filter unit manufactured for the
German company Andritz Fliessbett systeme GmbH, European
leader in the manufacturing of chemical industrial plants.
The required task was to obtain the proper filtration for an input
flow of warm air (60 ° C), containing powders (20 g/m3) of azelaic
acid with a particle size of less than 50 micron. This substance is
particularly aggressive because it tends to corrode the steel
structures; furthermore, when it is mixed with the air is also highly
esplosive. Also the external environment in which the filter must be
installed represented a critical issue, because of the corrosive
atmosphere, in relation to the proximity of the chemical plant to
the coast of the Tyrrhenian Sea (Sardinia island -Italy).
Pictures of the filter during the 3d design phase
Another critical element was represented by the necessity of
containing the overall dimensions, based upon the layout of the
chemical plant. This problem was solved through a three-
dimensional design of the entire filter, whichenabled us to manage
the static dimensioning of the system, as well as the resistance of
the filter to the pressure generated from the explosion.
Based on the instructions of the customer, we therefore decided to
build the filter as aseamless panel, using steel n. 1.4404 (AISI 316L),
since it’s pa rticularly suitable material resistant to the action of
corrosive agents while ensuring the mechanical and functional
requirements. The requested filtering value (less than 5 mg/m3)
has been guaranteed by the use of filtering bags made with a
special water and oil repellent material, capable of filtering
continuously, on a plant working 24/7 without interruption.
The filter efficiency of the bags was guaranteed by a reliable and
manageable cleaning system, able to stabilize the differential
pressure between the surfaces of the filtering-bags. The cleaning of
the filtering bags was obtained with a pneumatic system for
compressed air (at 6 bar) dried and disoiled, which operates in
automatic mode through an electrical control unit.
From the hopper of the filter, the filtered dust was discharged
through an ATEX certified rotary valve, manufactured also in steel
1.4404.
Automatic bags cleaning system
The explosive dust-air mixture has been considered at the design
stage according to ATEX.
Passive exhaust devices for overpressure control
Themanufacturerreservestherighttoamendorupdatethetechnicaldetailsandthedesignintheinterestoftechnicalprogress.
sch-newsletter-rev1 Issued by: MS www.tvm-termoventilmec.com
Allrightsonthiscataloguerestatanytimewithourfirm.Withoutourwrittenconsent,nopagesmaybecopiedorreproduced,neithermayitbecommunicatedorrenderedaccesibletothirdparties.

2. 17 TVM newsletter April 2013 2/2
Insulation for the bag-filterunit has been added to avoid condensation
and to avoid a dangerous heat transmission for the operators who
must occasionally go to control activity and / or manteinance.. Finally,
the excellence of the technological proposal of TVM termoventilmec
can be denoted by the accuracy of the manufacturing and preassembly
procedures used for the bag-filter unit.
The entire production has been made in order to guarantee the
preservation of the chassis components from any attack byexternal
agents due to the deterioration of the protective outer layer of steel
AISI 316L.
The most suitable manufacturing processes have been identified ; in
general, the entire construction process has been studied and
monitored also to avoidthis risk.
Assembly phase
The final result is a new range of bag filters that projects TVM
termoventilmec in the industrial filtration of the chemical-
pharmaceutical industry, according to the commitment of the
entire technical staff and commercial business in searchof filtration
solutions in various industrial areas.
The ongoing objective of TVM is to offer its customers:
SAFE PRODUCTS AND SYSTEMS
Every TVM product and system is the result of painstaking research
and development by our technicians in compliance with current CE
regulations, increasing reliability, durability and safety while
reducing maintenance costs and operational expenses.
COMPLETE QUALITY ASSURANCE
All products are manufactured and tested at our factory in
Spresiano (Treviso), according to Italian and European regulations
to maintain high quality standards.
RESPECT FOR THE ENVIRONMENT
Concern for the environment is also evident in the precise decision
to ensure that noise emission and particulate pollution values are
well below legal limits: this allows them to be ISO 14000 certified.
TECHNICAL ASSISTANCE
We respond promptly with competent personnel to any problems
that might arise during the life of the system and we offer planned
and individually tailored assistance foreach customer.
CONTINUOUS RESEARCH
Our technical office is constantly busy in the continuous
improvement of the products and the production processes with
particular attention to energy saving, in the design of machines
with elevated performances and therefore with smaller energy
consumption
Note to readers:
for further and constantly updated information about our company, visit our
website:
http://www.tvm-termoventilmec.com where you can obtain information on
products, systems and on the relev ant sectors.
By using the KEY: newair0237 it is possible to enter the restricted area to find
the company references, reviews and above all an area dedicated to
safety area where useful information can be downloaded.
You can send us e-mails via the contact page that we will give our prompt
attention to.
Previous TVM newsletter issues:
01 - March 2009, extraction systems
02 - April 2009, centrifugal fans
03 - May 2009, rotary star valves
04 - June 2009, silo storage and extraction systems
05 - July 2009, pneumatic conveying systems
06 - September 2009, self cleaning filter cyclones
07 - October 2009, state of the art extraction systems wood sector (Baco srl)
08 - Nov 2009, state of the art extraction systems marble/granite sector (Bretonspa)
09 - Feb 2010, state of the art extraction systems stainless steel sector (Thyssenkrupp spa)
10 - May 2010, energy saving in dust extraction systems (Conceria Montebello spa)
11 - September 2010, wood pellets: an extract of clean energy
12 - October 2010, industrial cent rifugal fans “SPG” model
13 - January 2011, state of the art in the suction system for metal finishing industries
14 - August 2011, suction ducting with movable hub for big working centers
15 - November 2011, gas exhausts filters
16 - July 2012, how to reduce eeenergy costs and be more competitive
Themanufacturerreservestherighttoamendorupdatethetechnicaldetailsandthedesignintheinterestoftechnicalprogress.
sch-newsletter-rev1 Issued by: MS www.tvm-termoventilmec.com
Allrightsonthiscataloguerestatanytimewithourfirm.Withoutourwrittenconsent,nopagesmaybecopiedorreproduced,neithermayitbecommunicatedorrenderedaccesibletothirdparties.