The photograph above shows a centrifugal ash receiver mounted above a National double dump gate airlock valve.
The centrifugal ash receiver has an important role in ash handling systems. Normally positioned on top of a silo or
storage hopper, it performs the principal separation between ash particulates and the ash conveying air flow by means
of cyclonic action (forces). The majority of ash particulates report to the lower apex cone of the receiver from which
they can be directly discharged to the storage silo, or in the case of a vacuum ash conveying system, this transfer is
performed using a double dump gate airlock valve as shown at the right. The airflow overflowing to the top of the receiver
reports to a companion pulse jet type dust collector for final particulate removal from the conveying air stream.
National provides a variety of highly efficient, abrasion resistant centrifugal ash receivers. For ease of replacement, these are of segmented. bolted design with all sections cast in NI-HARD having a minimum hardness of BHN 550 for maximum abrasion resistance.