The
PeriTec Wheat Debranning System
|
LEADING
THE FIELD IN DEBRANNING TECHNOLOGY |
The PeriTec Process
Wheat is cleaned and tempered to the desired milling moisture content as with a
conventional milling process. However, PeriTec does not require any scouring machinery in
the wheat cleaning section.
The wheat is pre-conditioned for debranning by adding a small amount of moisture and
controlling the length of time the moisture is allowed to penetrate the kernels. Only
allowing the outer bran layers to become damp aids the separation of the inner and outer
bran layers. The VCW Debranner abrades the damp outer bran off then sequentially removes
the thinner bran layers below the seed coat (Testa).
All the moisture that was added is removed in the bran and does not
affect the moisture content of the debranned wheat and the resulting flour produced.
The penetration speed of water into debranned wheat is far faster than with non-debranned
wheat. This phenomenon can be utilised to provide a rapidly reacting finished product
moisture control system that does not require the addition of water directly into the
flour stream.
In
a conventional mill up to 16 hours can elapse between the time the wheat is tempered and
the time it is milled. If the finished product moisture is not on-target it can be up to
16 hours before an adjustment in the moisture addition rate in the tempering system
becomes apparent in the mill.
In the PeriTec process you can temper wheat to a level 1% less than normal. After
debranning and immediately prior to milling, the additional moisture can be added. This
moisture penetrates the wheat within 30 minutes. The finished product moisture content can
control the moisture addition rate, so variances in the finished product moisture can be
quickly compensated for.
Increasing the Capacity of an Existing Mill
The PeriTec System is of particular interest to existing mills that are unable to increase
their capacity due to limitations of the existing building space or where planning
permission, or capital cost, precludes extending the existing building.
The PeriTec System can be installed in an unutilised area of the building. It is not
necessary to install the equipment in or alongside the existing mill machinery. All the
machines that are used in the process have relatively small footprints and in all but the
most exceptional circumstances space can be found to accommodate them. Because the system
is fully automatic and self-regulating it does not require frequent operator attention.
PeriTec Booster Units
In existing mills where there is some space for expansion the milling capacity can be
increased more dramatically using a PeriTec Booster Unit rather than a conventional
increase in machine content and capacity. A PeriTec system with three rollermills, one
purifier and one sifter can provide a capacity increase of 120 tonnes per 24hrs.
The PeriTec Booster Unit incorporates the head break and head reduction system. This
maximises the production of high quality flour streams. The remaining product is fed back
into the existing mill at the end of the break system and the middle of the reduction
system. These are areas that are usually under-utilised in a conventional mill flow and
can accept an increase in the feed to them.
It is usually possible to install most of the machinery prior to a
short shutdown to modify the existing mill flow. The existing mill can be operated with or
without the booster Unit running, without suffering any reduction in flour quality. This
is useful for mills with a varying production demand.
Locations & Functions
PeriTec Systems are already in operation in many countries including UK, Canada, Spain,
Italy, Greece, Israel, China, the Philippines and the Middle East. The process has been used in
plants producing bakers' flour, Durum semolina and flour for starch and gluten extraction
plants.
