40 food & drink processing
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chocolate its fat content could be adjusted automatically poorly served by unreliable instruments that are
in real time, maintaining product quality and reducing expensive to maintain. Now that industrially robust
wastage. systems are available, exploiting the clear benefits of
online viscosity control has become a realistic option for
Conclusion
every food processing professional. p
As with any other technology, the decision to purchase
and install an online viscometer is a matter of balancing Hydramotion is based in Malton, York, UK.
the likely rewards against both the initial outlay and the www.hydramotion.com
ongoing costs once the device is installed. However, by
investing in a reliable low-maintenance system such as
Re f e R e n c e s :
the Hydramotion XL7, there are immediate benefits in
1. Duffy, A P, Cullen, P J & O'Donnell, C P (Department
terms of improved efficiency, increased productivity and
of Agricultural and Food Engineering), In-line viscosity
enhanced process understanding, while running costs
monitoring of pizza sauce manufacture using a vibrational
are virtually zero. At the same time, labour and wastage
viscometer, in Proceedings of the 30th annual Food Science
costs can be significantly reduced. All this means that
and Technology Research Conference, UCC, 19–20
the payback time is usually measured in months rather
September 2000;
than years. In fact, some companies have benefited so
2. O’Callaghan, Schulz, O'Donnell et al, Improved Control
dramatically from using the XL7 that its installation has
in Dairy Processing (Online Sensor Control for Milk
become a closely-guarded industrial secret.
Powder and Cheese Manufacture), DPRC No. 42, 2001.
For too long, process viscosity measurement has been
ultrasonic plus air-mesh cleaning gives boost new computer control
to tumbler screens system
a
new highly effective combination of the combination system is applicable
both ultrasonic and air to machines of up to 2600mm diameter m
iwe is beginning to replace the
miwe cs, the company’s older
mesh-cleaning techniques introduced for and is also simple to retro-fit to tumbler control system for all its baking ovens
allgaier reciprocating tumbler screens in screens equipped with air cleaning. it and refrigeration systems, with its newer
ultra-fine screening applications, available gives the cost-effective sizing with control, the miwe tc.
in the uk from orthos, overcomes the precisely defined cut-points of materials one of the highlights of the control
mesh blinding problems of traditional previously requiring complex and is the 7-in colour touchscreen display
machines while substantially increasing expensive air separator processes and may that provides an easy operator-friendly
target size yields and be run continuously interface. the interface is conceived in
throughput. without any risk such a way that the control – given the
tumbler screens of overheating and same basic configuration as the monitor –
are widely used to the degradation or can be installed vertically or horizontally.
screen powders at melting of the display’s size (800 x 480 picture
separation sizes heat-sensitive elements) allows for large-scale readouts
from 20 to 400nm products. can be seen over considerable distances.
but suffer mesh tests of the also completely new is the only additional
aperture blockages system with operator feature of the control, a device
from powder difficult-to-screen that serves as a touch sensor.
agglomeration due materials such as the new miwe tc can store as many
to high inter-particle attraction forces if polyamide powders showed that yields as 250 baking programs with up to 8
effective cleaning aids are not used. mesh improved by 65 per cent over ultra-sound baking phases each. the arrangement
wires also become coated with powder, alone and by 43 per cent against only of the baking programs is extremely
reducing effective separation size and air cleaning, while throughput increases clear and easy to administer. above all,
machine capacity. were +68 per cent and +86 per cent when it comes to implementing multiple
allgaier discovered that combining respectively. baking ovens, the baking programs can
ultrasonic and air cleaning is much more main applications include plastics, be controlled centrally and then – for
effective than either method on its own, cellulose, powder coatings, example via a usb port or remotely
particularly towards the edge areas of the toners, metals, silicon, abrasives, coke, via lan – transferred to the individual
circular mesh panels. small air jets from gypsum, enamel powder, starch, rice flour ovens. p
perforated arms rotating below the panels and pharmaceuticals. p
enter 40a or ✔ at www.scientistlive.com/efood
loosen the screened material and
ultra-sound overcomes the adhesion for more information, visit miwe michael wenz gmbh, arnstein,
between powder particles. www.orthos.uk.com germany. www.miwe.com
www.scientistlive.com
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