Grain and Seed Conveying Fan

Grains and seeds are not like ordinary industrial bulk materials. They are living agriculture products. It needs to strictly maintain safety and quality and also needs to follow hygienic requirements. There are two engineering challenges in pneumatic conveying systems for grains and seeds.

The first one is product damage: grain kernels and seeds are fragile. Excessive air velocity or turbulent impeller impact can break, crack and damage seed coats. As a result, drops the germination rate and drops the market value of the food-grade grains.

Another challenge is safety: grain dust is combustible, which can easily catch fire. If a huge amount of grain's fine dust mixes with the air and creates a thick cloud inside the pipeline, then a spark from metal-to-metal friction can cause an explosion. In this case, spark-resistant construction must be a mandatory engineering requirement, not just an additional option.

Grain and Seed Conveying Fan can handle these two challenges at the same time. The radial tip impeller has open geometry, which is perfect for transporting the grain easily through the impeller without getting the grains stuck. Conveyor air velocity is determined by the specific products. Keep the velocity fast enough to move the grains and seeds through the entire pipeline without dropping out. Typically, it is around 12~16 m/s minimum by grain or seed type. However, air velocity should not be excessive, otherwise, seeds and grains can crack and get damaged. Spark-resistant construction and non-sparking materials are used on internal grain contact surfaces. It eliminates the risk of grain dust ignition. To ensure hygiene and contamination control requirements, we use SUS304 or SUS316 stainless steel for food-grade and seed-grade applications.

Engineers can choose precise airflow and static pressure for the Grain and Seed Conveying Fan based on their application requirements. This unit operation range is suitable for (dilute-phase) grain and seed conveying systems across grain terminals, flour mills, seed processing lines and agricultural storage facilities. This is the conveying fan that transports the product intact through the pipeline, keeps it hygienic, and eliminates combustion risk at every cycle.