Scale and sludge formed in
fluid process systems in the food, for example, the dairy industry are usually a mixture of inorganic
mineral salts and organic build-ups of such substances as calcium carbonate,
complex calcium phosphates (for example, milk stone), proteins, lactose, sugars
and fats. Also the rate of build up
can be so fast (within hours in the milk processing industry) that it is often
only possible for magnetic fluid conditioners to extend the length of runs between cleans.
In distilleries, the rate of build up is usually much slower and can
normally be controlled or totally eliminated.
It is also very important
what type of magnetic fluid conditioner units are installed as food production pipes and vessels
must be able to be totally cleaned to prevent or reduce the possibility of
bacteria problems.
Milk
products
processing in the dairy industry, as discussed below, is one of the more difficult process to treat,
however, the Scale-X magnetic fluid conditioners are still able to provide
significant benefits, for example,
extended run times
before cleaning is required, increased heat transfer efficiency and
reduced cleaning times. This
results in increased production, lower chemical cleaning costs and the units pay
for themselves many times over each year.
Scale-X
MFC's Installed on a
Multi Stage Milk Evaporator
Scale-X
MFC's are required to be installed
before each vessel on a milk evaporator as
both heating and pressure reduction takes
place in each vessel causing severe scaling.
Dairy Industry Milk Products Processing
Applications:
Scale-X magnetic
fluid conditioner devices
are effective in
treating milk stone, protein, lactose, sugars and fats and
are suitable for
application on the full range of milk products evaporative processes such as whole milk, skim,
whey, butter milk, permeates (for example, lactose) and fortified milk products,
etc.... It is
also applicable to UHT processes, pre-heaters and pasteurisers, etc..., as well as "on
farm" dairy equipment. Scale-X
MFC’s based on the advanced technology developed
for the chronic scale problems encountered in the O&GP industry has greatly
increased the benefits that can be achieved in all scaling applications
including the full range of milk products.
Installation:
Most milk processing systems are constructed of thin walled stainless steel tube.
Two basic types of
Scale-X magnetic fluid
conditioner
devices are available
for milk process systems:- (i) units forming an integral part of the process
piping (often referred to as “inline” units) and (ii) units which clamp
externally on the process piping. The
Scale-X
MFC's
are installed at, or just prior to,
identified scaling points, usually just before entry to vessels. The Scale-X
MFC is maintenance free. A
typical evaporator has a number of heating and evaporative vessels as shown
schematically and may require the application of multiple stages of Scale-X
MFC’s. Depending on the severity of the scale problem a MFC may treat
only one vessel or scaling point or may treat two or more scaling points or
vessels. To achieve maximum benefits install MFC's immediately upstream of each vessel
or scaling point.
Cause:
In
Milk Evaporators and pasteurisers, scaling is so severe and forms so fast,
often within several hours, that it can usually only be reduced, rather than
eliminated totally. This is predominantly milk-stone, which is a complex of calcium
phosphate mineral
salts. Organic scaling (proteins,
lactose and fats) is also a major issue in these systems.
However, Scale-X MFC’s can reduce
the rate of both organic and inorganic scale build-up significantly, which allows extended production run
times, and reduced chemical usage.
Maintenance: In
the Milk Processing industry, scale is a very significant problem that typically
requires daily treatment, as scale deposits build-up within hours, particularly
in the large milk evaporator vessels for producing powdered milk.
Application of Scale-X MFC’s
reduces the rate of scale build up considerably extending production runs
betweens CIPs (clean in place) and also reduces the length of CIPs and
quantities of cleaning chemicals required per CIP.
Scale-X
MFC's Installed Before a Milk
Process System Direct Steam Injector
Direct
steam injection is an extreme
heating process resulting in severe
inorganic and organic scale formation
Reduced Production Losses
from Scale Build-Up: As the rate of scale build up can
be significantly reduced, length of production runs are increased and down time
for CIPs is reduced resulting in an increase in production.
Thus overall production can be maintained at higher levels than would
other wise have been allowed, which would normally return the cost of
installation of the Scale-X MFC’s
many times over each year.
The policy
of operation of the evaporator (or other milk processing plant) and
the severity of the scaling problem will determine the benefits realised, that
is,
increased run time, reduced cleaning chemicals, reduced cleaning time or a
combination of these.
Typical
increases in length of run times between cleans range from 25 to 85% increase
depending on the product being processed. The
more severe the rate of scaling the less the improvement, for example, a milk
evaporator which previously was cleaned every 14 hours processing whey had its run time extended to 19 hours, and a evaporator processing skim milk which
previously ran 19 hours before CIP was extended to 35 hours.
This technology has proved effective not only on full cream milk, skim
milk and whey products but also on fortified milk products such as protein
and sucrose fortified milk products.
Control of Bacteria: By reducing the rate
of formation of scale and sludge in these milk process
systems, Scale-X MFC’s reduces the nutrients and alters the
environment in which thermophiles and anaerobic spores live.
This can result in a significant reduction in the bacteria problem.
This is discussed in the Australian Dairy Foods Journal articles
one
and
two reporting the use of Magnetic Technology’s Scale-X
MFC’s on milk evaporators in the production of milk powder.
The factories were able to meet the more stringent bacteria
specifications when the magnetic units were installed.
----
Introductory
Page ----
|
|
