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| Titel:
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New Test Method for Rotating Spray Head Performance in Tank Cleaning |
| Type:
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Conference articleConference article |
| Person(er):
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Technical University of Denmark
Email:
Forfatter:
Dethlefsen, Markus Wied
Technical University of Denmark, National Food Institute
Forfatter:
Jensen, Bo Boye Busk
Alfa Laval Tank Equipment A/S, Denmark
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| Uddrag:
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The purpose was to develop a new, easy and fast, test
method for evaluation of rotating spray heads (RSHs)
performance in tank cleaning, which does not require
advanced training.
A visual cleaning test was chosen, in which a visible
soiling medium is spread on a plate and the cleaning
time is recorded. Choosing a suitable soiling medium
was important. Amongst others the following criteria
should be met: Readily available, water soluble, adequate
removal pattern. The removal pattern is important,
as the test medium should be removed by water
droplets and not, as seen with some soils, in flakes.
The chosen medium was a mixture of commercially
available toothpaste and tap water. This mixture meets
the needed criteria. One issue with the mixture was a
tendency to foam formation, however an anti-foam
agent was successfully used.
Final test method: Preparation of test medium; even
spreading on a standardised stainless steel plate; positioning
the steel plate in tank; record total cleaning
time. The method was tested on four different RSHs
from Alfa Laval. Cleaning times were recorded at different
distances and flow rates.
Using the new method, it is possible to distinguish between
RSHs based on the cleaning time at the same
distances and flow rates. A new method for testing and
comparing the performance of RSHs, is found and will
help in development of a standardised method for objective
evaluation of different RSHs. |
| Publiceret:
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in journal: Journal of Hygienic Engineering and Design, pages: 40-43, 2011 |
| Præsenteret ved:
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World Congress on Hygienic Engineering & Design, Ohrid, Macedonia |
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