Steam Tube Dryer

Steam tube dryer is one of the indirect heated rotary dryers, which contains rotating shell, rows of steam tubes arranged in concentric circles and extended throughout the length of the dryer. Steam tubes are designed to transfer heat from steam to the material being dried. This is one of the most energy efficient dryers. The tubes and radial fights together serve to agitate the material and to provide required residence time.

Spin Flash Dryer is ideal for drying of wet cake, slurry, paste which is normally difficult to dry in other dryers. The material is fed by screw feeder through a variable speed drive into the vertical drying chamber where it is heated by hot air and at the same time disintegrated by a specially designed disintegrator. The heating of air may be direct or indirect depending upon the application. The dry powder is collected through cyclone separator / bag filter or with combination of both.

It is best suited for continuous drying of temperature sensitive and sugar containing products at low temperature under vacuum conditions. The dryer consists of a vacuum chamber in which conveyer bands of food grade quality are arranged. The band passes over the hot plates heated internally by steam or hot water. Feed product is spread on the moving band and is dried as it moves on the hot plates. Dried product is obtained at the other end.

This type of dryer is used for converting concentrated material to solid/semi solid form. This is designed with vacuum system / without vacuum system. Solvents/water is collected through condenser.

Feed is pumped to heat exchanger where it is scrapped/agitated through series of multiple blades on the inner surface of a vertical shell and shell is heated by steam. Due to vigorous agitation the heat transfer is fast and slurry is converted to solid/semi-solid form.