subject: The Fluid Bed Dryer Assembly [print this page] In Examples 5 and 6, the product container and gas distribution plate were transported to a fluid- bed dryer assembly shown in FIG. 6 , where the upper plenum had a diameter, 16, identical to the distribution plate, 16. The fluid bed dryerassembly and product container were sealed, and a heated argon gas stream, flowed up through the liquid at such a rate, where the bed behaved with bubbling fluidization characteristics shown in FIG. 7 . After the argon gas stream fluidized the liquid/solid mixture for 120 minutes, the liquid content of the mixture in the product bowl was measured and recorded. The gas stream in Examples 5 and 6 was recirculated. The gas stream from the fluid- bed dryer was passed through a condenser, which removed the majority of the solvent in the argon gas stream. The gas stream was heated by a heat exchanger before being recirculated to the fluid- bed dryer apparatus. Since a small amount of solvent was recirculated to the inlet of the fluid- bed dryer, the recycling fluid- bed drying step took more time than the once through drying step described in Examples 1-4.
he product container and gas distribution plate were transported to a fluid- bed dryer assembly shown in FIG. 4 , where the upper plenum had a larger diameter, 11, than the product container, 4. The fluid bed dryer assembly and product container were sealed, and a heated air stream, 73 F., flowed up through the mixture of magnesium oxide/methyl alcohol at such a rate, 120-140 ft/min at the distribution plate, whereby the bed behaved with incipient fluidization characteristics shown in FIG. 7 . After the air stream fluidized the liquid/solid mixture for 15 minutes, the methyl alcohol content of the mixture in the product bowl was 1.4%.
Furthermore, the solids can be transferred to a fluid bed dryer that uses a gas stream to remove moisture from the solids. Significantly, during the transfer of the solids from the filtration chamber to the fluid- bed dryer, the solids can be contaminated, spilled, lost, and/or degraded.
