The operation of spray dryers in making powder products from
liquid feeds is frequently limited by the wall deposition fluxes
inside the equipment, which result in the powder depositing on the
walls. The build-up of powder results in lower product quality and
safety concerns due to possible combustion of powder deposits. In
order to overcome this problem, the dryer needs to be cleaned
frequently and this increases the down time for the dryers.
Reduction in cleaning time is desirable because it will give rise to
increased production time and possibly a reduction in the cost of
manufacturing the product.