Pneumatic conveying pilot plant

Figure 5.4. Sketch of pilot plant arrangement for testing pneumatic conveying under positive pressure (Kraus, Pneumatic Conveying of Bulk Materials, McGraw-Hill, New York, 1980).

Such pilot plant data are cited for the rotary dryer of Example 9.6. For the pneumatic conveying dryer of Example 9.8, the tests establish heat and mass transfer coefficients which can be used to calculate residence time under full scale operation. 

Plate exchangers, 189,195 Plates, fractionating. See Trays Pneumatic conveying, 71-76 dense phase transfer, 74 equipment, 72,73,75 flow rates, 72 operating conditions, 73 pilot plant, 74... 

Entrainment Dryers In design mode, the required gas flow rate can be obtained from a heat and mass balance. For pneumatic conveying dryers, duct cross-sectional area and diameter are found from the scoping design calculation (if required gas velocity is unknown, a typical value is 20 m/s). Duct length can be estimated by an incremental model, but some parameters are hard to obtain and conditions change rapidly near the feed point, so the model is most effective for scaling up from pilot-plant data see Kemp and Oakley (2002). Spray... 

Similar results are reported from the drying of bark and peat in superheated steam in a pilot-plant pneumatic conveying dryer [22], The results are presented as a convective apparent heat-transfer coefficient, defined with the assumption that the temperature of the particle surface coincides with the saturation temperature of the transport steam. This transfer coefficient shows a clear dependence on the moisture content of the particles and the particle sizes. Fyhr [23] presented a model for a pneumatic conveying steam dryer. The dryer model consists of two submodels, one for the single particle and the other for the hydrodynamics of gas and particles in the dryer. 

Similar results are reported from the drying of bark and peat in superheated steam in a pilot-plant pneumatic conveying dryer [22]. The results are presented as a convective apparent heat-transfer coeffi-... 

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