Dry Desiccant Design Example

The detailed design of solid bed dehydrators. should be left to experts. The general rules of thumb presented in this chapter can be used for preliminary design as shown in the following example  

Molecular weight of gas Gas density Operating temperature Operating pressure Inlet dew point Desired outlet dew point 

For this example, an 8-hour on-stream cycle with 6 hours of regeneration and cooling will be assumed. On this basis, the amount of water to be adsorbed per cycle is  

Because of the relative cost, use Sorbeads as the desiccant and design on the basis of 6% loading. Sorbeads weigh approximately 49 Ib/ft (bulk density). The required weight and volume of desiccant per bed would be  

Fiecommended maximum superficial velocity at 600 psia is about 5 ft/min. From Equation 8-2, assuming Z = 1.0  

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