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Difference between revisions of "Plate Dryers"
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'''Plate Dryers''' are widely used in the chemical industry and can vary accordingly to the type of fuel. The process of plate drying is very much similar with the [[Belt Dryers]] wherein a distribution conveyor provides the even distribution of material over the entire surface. The plate-belt consists of plates made of perforated, powder coated tin or stainless steel. By turning down the plates at the belts end, the drying material is shifted to the lower level. Thus the belts surface is used in both directions of travel, which has for the advantage that the footprint of the dryer is comparatively small. The dryer is modular designed. Between the racks for the drive gears and guide rollers more or less belt elements are installed. The processing of the drying air is done by an exhaust air fan. Optionally this can be equipped with variable frequency drive. A dust filter for the exhaust air or biofilter can be connected at the outlet side, if necessary. | '''Plate Dryers''' are widely used in the chemical industry and can vary accordingly to the type of fuel. The process of plate drying is very much similar with the [[Belt Dryers]] wherein a distribution conveyor provides the even distribution of material over the entire surface. The plate-belt consists of plates made of perforated, powder coated tin or stainless steel. By turning down the plates at the belts end, the drying material is shifted to the lower level. Thus the belts surface is used in both directions of travel, which has for the advantage that the footprint of the dryer is comparatively small. The dryer is modular designed. Between the racks for the drive gears and guide rollers more or less belt elements are installed. The processing of the drying air is done by an exhaust air fan. Optionally this can be equipped with variable frequency drive. A dust filter for the exhaust air or biofilter can be connected at the outlet side, if necessary. | ||
==Working principle== | |||
A plate dryer is a device designed for the particularly gentle thermal treatment of product. The wet product is continuously and evenly applied through an feed chamber onto a perforated belt. The belt, predominantly in horizontal position, carries the product through the drying area which is divided into several sections. In these cells drying gas flows through or over the wet product and dries it. Each cell can be equipped with a ventilating fan and a [[Heat Exchangers|heat exchanger]]. This modular design allows the drying and cooling temperatures to be controlled separately in the different sections. Thus, each dryer cell can be individually controlled and the drying / cooling air flow can be varied in each cell. In addition, the speed of the conveyor belt can be varied what gives an additional parameter for setting of drying time. | |||
The cells can be heated or cooled directly or indirectly, and all heating media, such as oil, steam, hot water or hot gas can be used. | |||