Superheated steam drying feasibility

Table 20.3 summarizes the key factors contributing to the feasibility of superheated steam drying. Both product- and process-related factors must be considered. Laboratory testing is required before proceeding with any decision to consider superheated steam drying. 

Table 7.2 Factors Contributing to the Feasibility of Superheated Steam Drying...

It appears that the results of experimental studies presented in this chapter have amply demonstrated the technical feasibility of plasma-assisted drying. The most promising is the use of a plasma and/or superheated water vapor as the heat source and drying carrier. In addition to the advantages inherent to superheated steam drying (see Chapter 7), the use of steam plasmas may offer the following benefits ... 

Table 10 provides a list of factors that contribute to the feasibility of superheated steam drying. It is obvious that this technology is not suitable for all types of materials. 

Table 10 Factors contributing to the feasibility of superheated steam drying. ...

Products that may melt, undergo glass transitions, or be otherwise damaged at the saturation temperature of steam at the dryer operating pressure cannot clearly be dried in superheated steam even if they contain only surface moisture. Operation at reduced pressure, however, is a feasible option that may also enhance the drying rate. 

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