Types of Dryers Flashcards
What are the 10 types of dryers?
(ALL ENDS WITH “DRYER”)
drum, cabinet or compartment, kiln, spray, tunnel, vacuum shelf-, air-lift, belt-through, fluidized bed, puff and pressure puff
a hot drum which is allowed to rotate to which a thin film of solution is applied.
converts the solutions and suspension into solids
used in milk, veg. juices, bananas and potato flour and flakes
Drum drier
used for batch drying of solid foods at small to moderate scale
used in drying fruits and veg
and commonly used in laboratory
studies and small-scale operations
Cabinet or compartment drier (OR TRAY DRIER)
suitable for drying potatoes and apple slices
Kiln drier
used for drying liquid solutions and suspensions, with the objective of producing light, porous powders
used in milk, cream, coffee, tea
Spray drier
4 types (?) of spray drier
Horizontal con-current,
Vertical down-flow con-current, Vertical upflow con-current,
Vertical upflow counter current
consist of long tunnels through which trucks carrying stacks of trays travel with or against a stream of drying air
used in leavening yeasts, fruits and veg
Tunnel drier
consists of a cabinet with hollow shelves where the heating medium is circulated, and the product is placed in pans on the shelves.
can puff dried, citrus powder and tomato powders
Vacuum shelf-drier
In this type of dryer, food products like potato granules are mixed with hot air and carried up a narrow column. When the product gets dried, it gets suspended in air due to air velocity incorporated.
air-lift drier
used to produce diced potato and piece form veg
Belt-trough drier
In ______, hot and dry air is used both for fluidization and for drying.
can be applied to particulate, non-sticky foods with particle size within the range of 0.05 to 10 mm depending on the density.
can be in batches or continuous
can use to make mashed potao
Fluidized bed drier
used to make fruit juices and puff breakfast foods
Puff and pressure puff driers
