Technology/IT | IDM
9 2017 | international-dairy.com · 21
New bagging process at MILEI (photo:
Derichs)
and (2) a plant for high protein derivatives
from milk and whey.
Conveyor systems
Both systems have several product-specific
pneumatic conveying systems as well as a
large number of silos.
The conveying systems were specially designed
for the properties and requirements
of the finished products. As a result, the
protein derivatives are conveyed as gently as
possible by means of "dense phase" conveying
systems with transmitting vessels. The
lactose and permeate powders are promoted
by specially developed systems in such a
way that a reliable conveying is ensured without
the usual glazing in the pipelines.
For all systems, complex filters and air conditioning
stations have been used to ensure
the required product quality.
Silo
A total of 13 silos with a storage capacity of
150 m³ each with Atex-compliant equipment
were installed. All silos are inside the building
and are equipped with exact weighing
systems that measure the silo content with
an accuracy of up to 50 kg. This allows for a
very accurate record of the inventories and
tower services.
Special delivery systems optimised for lactose
and permeate powder ensure a safe
product output even for longer product
storage. Additional ventilation systems for
the silo headroom, using filtered and dried
air, ensure hygienic storage of the products.
Mixing line
To prepare various functional dry mixes, a
mixing line was installed with a Derichs batch
mixer type MBZ. Due to its large motorised
cleaning doors, the mixer can be cleaned
optimally and quickly. The two-shaft paddle
The main stream powder conveying was
solved using pressure vessels (photo: Derichs)
A total of 13 powder silos was installed at
MILEI (photo: Derichs)
mixer makes it possible to produce homogeneous
mixtures quickly and in a productfriendly
manner. The product feed and dosing
is made from silos, big bags and sacks.
Loose loading in silo
vehicles
The end products are loaded into silo vehicles
via a hygienic, pneumatic loose loading
system. The silo vehicle is, during loading, in a
closed and air-conditioned room.
Product safety
All products are compliant with the highest
requirements on foreign bodies before they
are packed in bags, big bags or silo vehicles.
For this reason, sieves, metal detectors and
rotating permanent magnets are installed.
Process IT
Control of the plant is managed a Siemens S7
PLC with a distributed peripheral edge. Plant
operation and process visualisation are carried
out via a process control system based
on WinnCC with redundant servers. Thanks
to the integrated remote maintenance, a
diagnosis of the hardware and software as
well as support of the operating personnel
by Derichs is possible at any time.
Dust-free system
The dust-freeness of a system depends to
a large extent on the quality of the system
concept and the components used. Derich's
experience with similar systems has been a
key factor in achieving this goal. For example,
all silos are kept at a slight vacuum to limit the
dust load to an absolute minimum. In addition,
the exhaust air from the filters is not led into
the building, but to the outside. This, in conjunction
with the experienced and conscientious
operating team, led by Mr. Wiedemann,
ensures that the company always meets the
requirements of its customers.
Product separator (photo: Derichs)