Protecting your products from the effects of high humidity within silo's
engineered for efficiency, built to last
SILO HEAD SPACE CONDITIONING
Why control the relative humidity in silo head spaces?
Materials that are stored in silos can be affected by high relative humidity in the air. Many silos can be affected, for example those containing food stuffs such as flour and sugar, sewerage industry flocculent silos, cement, etc...
At lower temperatures, the relative humidity of the head space air will increase when the saturation point is reached. Air will begin to deposit moisture on internal surfaces of the silo. This common problem can be eliminated by ensuring that air in the head space is maintained at a low relative humidity.
Commons problems associated with high humidity in silo head spaces are
Degradation of product quality
Irregular product flow
Increase in microbial activity
Increase in product moisture content
Condensation forming on internal surfaces
Common materials affected by high humidity
FOOD PRODUCTS (MILK POWDER/FLOUR)
The solution to high humidity within silos
The installation of a desiccant dehumidifier in the base of the silo skirt is the simplest, most cost effective solution. The dehumidified fresh air can be ducted to the head space through either the fill line or via a dedicated dehumidified air line, this causes a slight overpressure in the silo head, with excess air discharged via the vent filter assembly, ensuring that air in the head space is maintained at a low relative humidity.
*It is important to note that the desiccant dehumidifier must be isolated during filling to avoid damage.
In some cases a recirculation system maybe required to achieve very low humidity levels, an example being PLA (Polylactic Acid). In this scenario additional filtration is required to avoid potential damage to the dehumidifier.
The MDC250 provides an ideal dry air head space conditioning solution for many small to medium silos and is often suitable for silos up to 150m³ in volume.
*Optional controller available for monitoring of outlet air condition.