Cyclone screening technology ensures the quality

TECHNOLOGY
Cyclone screening technology
ensures the quality of baked goods
S UPE R IO R RAW MATE R IALS W ITHOUT ANY CONTAM I N ANTS AR E A PR E R EQU I S ITE FO R HYG I E N IC
PRODUCTION. TH E R EFOR E, MODE R N SCR E EN E RS MON ITOR TH E COMPON ENTS BEFOR E, DU RI NG
AN D AF TE R PROCE SS I NG. TH EY ALSO E N S U R E THAT HACCP IS ADH E R E D TO AN D R EQU I R E M E NTS
AR E SAT I SF I E D W ITH R E G AR D TO TH E I FS STAN DAR D AN D E U178 DI R ECT IVE
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3-D graphic of a cyclone screener
type DA
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Control screening directly upon
delivery with silo vehicles
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Loading sacks using a double
feeding hopper with control
screening
These screening systems ensure the
quality of the end products in the
fresh-baked and non-perishable baked goods
sectors, where bulk solids or liquids are
processed. They protect them from foreign
materials and contaminants before, during
and after production. As an important component in material handling systems, screening systems make a substantial contribution
towards ensuring quality.
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Inline screening
Examples of interesting applications:
control screening
segregating foreign particles
breaking up clumps
separation
aeration
recovery
fractionation
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Cyclone screening – a milestone in
screening technology
The invention of cyclone screening by AZO
has opened up new dimensions in screening.
After six decades of consistent, ongoing development, augmented by a constant flow of new
© AZO
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© AZO
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ideas, cyclone screening technology is today,
in widespread use throughout the world.
Thousands of users apply it to safeguard quality
standards in manufacturing (see figure 1).
TW 650 for control screening upon
delivery with silo vehicles
The TW screener monitors all free-flowing,
bulk solids in powder form in closed, pneumatic conveying lines. It operates first and
foremost as a preliminary screen on the conveying line between the silo vehicle and
storage silo. The screener effectively prevents
contaminants or lumps from getting into the
silos. This additional check at entry improves
both safety and quality (see figure 2).
Vibrating screen and vibrating grits with
breaking device for feeding products from
sacks
When feeding individual components to the
automatic process, there must be safeguards to
prevent any contaminants from getting into the
process. Preliminary screens in feeding hoppers,
big bags or container discharge stations already
keep out residues from packaging materials and
++ Author: Walter Sonntag, Divisional Manager, Marketing/Documentation,
AZO GmbH + Co. KG, Osterburken, Germany
BAKING+BISCUIT ISSUE 02 2012
23
TECHNOLOGY
foreign particles when products are being charged. Vibrating
screens assist the flow of non-free-flowing bulk solids.
Vibrating grits with breaking device break up clumps carefully.
Vibrating screens are also available with automatic segregation
of foreign particles (see figure 3).
Control screening with the original type E
With their compact design, it is easy to integrate cyclone
screeners into production processes. This also means fixed
© AZO
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© AZO
++ figure 3
installation is possible since the machine itself runs without
vibration. Cyclone screeners operate in closed systems without generating dust. The free-floating screen fabric is selfcleaning and reduces the need for maintenance considerably.
Even products with a high moisture and fat content can be
screened without difficulty.
Products are frequently screened immediately upon discharge from the silo and then fed directly into a vacuum
weighing system (see figure 4).
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BAKING+BISCUIT ISSUE 02 2012
TECHNOLOGY
© AZO
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© AZO
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Control screening and aeration prior to kneading
Cyclone screener with self-dosing, easy to inspect and clean
Various-sized models with screen cartridges made of nylon
or antistatic carbon screen fabric for fine mesh sizes or of
wire mesh or chromium-nickel steel for coarse mesh sizes
open up a wealth of potential applications for cyclone
screeners. The screeners are available in mild steel with an
epoxy resin coating and a chromium-nickel steel line with a
variety of surface finishes.
In certain situations, the raw materials can be screened with
a cyclone screener immediately prior to the kneading process.
This cuts the costs involved in complying with hygiene regu lations. When charging kneading machines, the screeners
also ensure that the flour is aerated (see figure 5).
The worldwide patented type DA cyclone screening
technology with self-dosing
Crucial advantages of the DA screener with self-dosing are
the simple handling and the low overall height. No additional
dosing unit is needed with the result that these screeners can
also be easily integrated into existing feeding systems, even
when there is little space. Another highlight is that this system
is easy to clean and maintain. Both the screw conveyor and
the entire screen basket can be removed in next to no time
without the need for tools.
This means: replacing screen baskets during maintenance or
when changing products is faster (see figure 6).
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Type FA cyclone screeners in closed conveying lines
The type FA cyclone screener is used directly for control
screening, protective screening, fractionating, segregating
foreign particles, breaking up clumps and aerating products
in pneumatic vacuum conveying systems. These screeners can
be used throughout the entire production process – regardless
of whether used before or during processing (see figure 7).
© AZO
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Compact installation in pneumatic vacuum conveying systems
BAKING+BISCUIT ISSUE 02 2012
Control screening and dosing
There are now a whole range of cyclone screeners that cover
almost all potential applications in the baking industry. +++
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