The Carousel Dryer - 30 years proven technology

Reliable and Easy Moisture control

For the past 40 years, IDAH designs and manufactures equipment and process lines for the aquafeed and pet food industries. In 2011, IDAH started focusing on the Carousel Dryer technology. Our team of expert Engineers have worked intensively to improve the Carousel Dryer technology even further to increase the drying process efficiency. The Carousel Dryer delivers outstanding performances when compared to traditional dryers. The main advantages of choosing a Carousel Dryer are:

• All the products undergo the same drying conditions, resulting in very uniform and steady drying.
• Optimal counter-flow heat transfer, resulting in low energy costs.
• Quick changeovers in a controlled way, lessen product contamination.

The impact of moisture on your product

When choosing the correct dryer for your application, moisture control should be one of the most important selection criteria. Moisture has serious impact on your product quality and cost price levels, and profits for your business One aspect of moisture control is uniformity, together with drying result consistency–in-time will determine the target average moisture content. The closer the average moisture to the maximum moisture levels, then the less raw material are lost through over-drying, generating more profit for your company.

In the cylindrical-shaped Carousel Dryer, the product is rotated 360° on multiple decks and mixed by each drop when the tray gently tilts and the material flows into the deck below. By rotating the product, the product is situated in a fixed air stream, so all the product gets the same drying conditions resulting in a product with uniform moisture and consistent quality. In summary, uniform consistent drying is using less raw material and reducing energy costs.

Improving dryer efficiency and saving energy costs

Water evaporation, or drying, is naturally a highly energy-intensive process. The drying process has an unavoidable constraint to supply enough energy for evaporation. The efficiency of a dryer will be determined by the energy input about the amount of water evaporation.
The Carousel drying air passes the incoming product in this multiple layer dryer in a counterflow direction to achieve maximum heat transfer, resulting in a low exhaust air temperature. This in combination with drying air recirculation will reduce the exhaust air volume and improve energy efficiency.

Another option for energy conservation is the re-use of the cooling air. Using the cooling air as make-up air for the dryer will reduce the volume of exhaust air resulting in fewer odor control issues. Plus, all the heat from the cooled product will be used in the dryer for water evaporation. This combination will improve dryer efficiency and saving energy costs.

The feed market trend is demanding to customize products, which results in an increase of formula-changing frequency. This situation demands producer to have a good and tight production schedule to keep machine running optimally, while at the same time ensure no product contamination using the FIFO (first in first out) principle.