petfoodpro 3/2023
PetFood PRO is the international magazine for executives and specialists in the manufacture of food for domestic animals – the pet food industry. The magazine focuses on food and delicacies for dogs, cats and other small animals, ornamental birds and fish, as well as animals kept in terrariums. We publish feature articles, reports and announcements about new ingredients, technology, equipment and processes, packaging machinery and materials as well as marketing trends and developments. Readers are executives, product developers and specialists in the pet food industry, including process and packaging engineers. PetFood PRO will be published in English. Circulation is worldwide, with an emphasis on important growth markets.
PetFood PRO is the international magazine for executives and specialists in the manufacture of food for domestic animals – the pet food industry. The magazine focuses on food and delicacies for dogs, cats and other small animals, ornamental birds and fish, as well as animals kept in terrariums.
We publish feature articles, reports and announcements about new ingredients, technology, equipment and processes, packaging machinery and materials as well as marketing trends and developments. Readers are executives, product developers and specialists in the pet food industry, including process and packaging engineers. PetFood PRO will be published in English. Circulation is worldwide, with an emphasis on important growth markets.
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PROCESSING<br />
Air Routing and<br />
Dehumidification<br />
Extremely dry process air is used for drying.<br />
The airflow rate is controlled to meet the<br />
requirements of the specific product.<br />
For one thing, the product is supposed<br />
to be dried as efficiently as possible. For<br />
another thing, the snacks must remain on<br />
the belts rather than fly through the dryer.<br />
Yet, it is not only the quantity and speed of<br />
the air that matters. "Air routing is always<br />
a major factor contributing to successful<br />
drying because the air, by its very nature,<br />
invariably follows the path of least<br />
resistance," explains Michael Richter of<br />
Harter Technical Sales. It is one of Harter’s<br />
secrets of success to know how to direct<br />
the air to follow the correct path and to<br />
know the engineering tricks to achieve<br />
this. This is why there are no details<br />
disclosed here. "What counts at the end<br />
of the day is that the product is perfectly<br />
and uniformly dehumidified - and this is<br />
the goal we achieve," summarized Richter.<br />
Yet, where does the process air come from<br />
and what happens to it?<br />
Figure 2: The cat snacks are dried on five belts in vertical array to obtain the exact degree of<br />
dryness and to ensure uniform dryness. The drying process is reproducible and extremely<br />
economical owing to the heat pump technology employed.<br />
The big success of this low temperature<br />
process is its physically alternative<br />
approach. Drying is accomplished using<br />
extremely dry and thus unsaturated air<br />
passed over or through the items to be<br />
dried. It absorbs humidity excellently.<br />
Subsequently, the air is cooled – the<br />
humidity condenses to form water –<br />
reheated and returned to the drying<br />
chamber. The temperature may be varied<br />
YOUR CATCH<br />
OF THE DAY.<br />
Discover high quality and reliable<br />
bulk material handling for<br />
pet food production.<br />
Plant engineering<br />
from a single source.<br />
Our innovative systems and<br />
solutions for the production<br />
of dry and wet pet food will<br />
fascinate you. We offer you<br />
highly efficient technologies for<br />
almost all processing steps,<br />
with decades of experience in<br />
bulk material handling and food<br />
processing.<br />
Plus, 24/7 service and a spare<br />
parts supply for many years to<br />
come. For permanently smooth<br />
production.<br />
Catchy, isn’t it?<br />
zeppelin-systems.com<br />
Issue 3 <strong>2023</strong><br />
29
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