Spouted drying equipment

Scale-up data of conventional SBDs are well known, but the relations cannot be applied to MSB dryers with inert packing due to different hydro-dynamical and drying characteristics. Therefore, the drying mechanism itself, effects of various process and operational parameters, and the relevant relationship had to be investigated in more detail. Important dimensions as well as geometric, physical, and hydro-dynamical characteristics of equipment and of the particles forming the spouted bed are summarized in Table 15.3 [18-20]. 

The wheat drying studies were carried out in a spouted bed predryer of rectangular cross section equipped with a draft tube, and also in a cylindrical afterdryer (Tables 15.1 and 15.2). The experimental conditions and the data of the... 

A number of prototype SBDs have been used to dry shelled com. One pilot-plant dryer has a designed capacity of 100-kg water/h, based on 10% moisture ranoval. This dryer is suitable for drying at two levels and for carrying out cooling after the drying. Accordingly, the equipment consists of a unit of smaller capacity (300 x 400 mm) and is equipped with a gas inlet nozzle and a draft tube, and of a spouted bed dryer of a CTOss section of 0.32 m (800 x 400 mm) developed with two gas inlet nozzles [21]. The main characteristics of the shelled... 

Drying of Shelled Corn in a Continuous Spouted Bed Dryer Equipped with a Draft Tube and an Inner Conveying Screw... 

For the first group the following types of dryers are generally used convective (tray, band, fluid bed, flash dryers, and their modifications) or contact (vacuum dryers such as double-cone dryer-blender, conical dryer with rotating helical mixer, paddle dryer). Pastelike materials are dried in tray dryers, band dryers equipped with extruding devices, and spin-flash dryers. Finally, thin pastes can be dried in spray dryers or on fluid beds or spouted beds of inert particles. Small amounts of solutions and suspensions are generally freeze-dried, especially if the product is thermolabile. 

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