Strahl - Model FB Series - Continuous Flow Grain Dryers
From Grain Dryers
The continuous flow grain dryers of the FB series are the smallest machines produced by Strahl. They are fixed, robust, and durable machines which ensure cereals, legumes or oilseeds to be dried evenly.
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Construction features of the FB grain dryers
- The continuous flow grain dryers manufactured by Strahl are made of galvanised sheet metal panels that make them exceptionally robust.
- They have an upper hopper with braided reinforcement pipes and Aluzinc coating, which is the same material used for the air distribution ducts. The whole machine is built with panels having flaps on the outside and with a final drip tray, to avoid the dangerous build-up of dust inside the chamber.
- The extractors have a special design and a high ratio between the diameter of the impeller and that of the fan which allows noise to be reduced. Noise reduction is also guaranteed by the layer of stone wool covering the internal sides of the extractors.
- The FB Series is manufactured with two versions: one with linear burners, the other with traditional burners. Finally, the discharge device allows large quantities of product to descend in a very short time, avoids pollution phenomena when passing from one cereal to another, and excludes the risk of jamming even in the presence of foreign bodies.
Operation of the continuous flow grain dryers
- In the FB series dryers, the product descends by gravity through a series of staggered channels that cause a zigzag movement and a continuous stirring of the product to ensure that it descends evenly. The width of the final cooling zone can be adjusted, and the amount of air can be dosed with special dampers.
- The air movement is ensured by one or more fans placed in the upper part of the air collection chamber. The air that enters through a duct, is forced through the
- product and exits through the four outlet ducts surrounding it; moreover, each outlet duct receives the air that has entered from the four surrounding ducts.
- The exchange system between the air and the product is a mixed flow system and guarantees that all the grain is crossed by both a concurrent and counter-current air flow while descending.
Grain dryers and emissions: how to reduce them
- Strahl cares for environmental sustainability and all our machines are built with measures aimed at reducing emissions into the atmosphere. First of all, when the pressure in the dryer is reduced, the saturated air is collected by the upper extractors and, therefore, there are no emissions in the workplace.
- Dust is emitted when the dryer is operating due to the product crossing the air flow which removes the lighter parts. Strahl has in fact implemented special important measures to reduce both product handling and air speed while the product is in circulation. Among these, an extraction device that allows large quantities of the product to be discharged in a very short time. A significant quantity of dust is emitted only during the extraction, which lasts about 20-40 seconds every hour; to further reduce the emission, the air flow is interrupted during the movement of the product.
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