A system and method for the thermal treatment or blanching of food product. The system comprises a horizontally rotatable auger with perforated flights to convey the product from and a supply side to discharge, enveloped by a cylindrical body partially filled with water, guaranteeing entire submersion the product. A first part of the auger is supplied with hot water at first temperature and discharges water from the cylindrical body near the product inlet side of the auger. A second part of the auger is supplied with hot water at a second temperature and discharges water from the cylindrical body near the product outlet side of the auger. It has been found that in this way a compact and cleanable rotary screw type thermal treatment or blanching system is provided, with two successive zones providing optimal process controllability, the ability of low temperature energy reclaim, minimization of the use of fresh make-up water and minimal product damage.
A23L 3/18 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by heating loose unpacked materials while they are progressively transported through the apparatus
A23L 5/00 - Preparation or treatment of foods or foodstuffs, in generalFood or foodstuffs obtained therebyMaterials therefor
A23L 19/00 - Products from fruits or vegetablesPreparation or treatment thereof
A23N 12/04 - Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for washing or blanching for blanching
F28C 3/04 - Other direct-contact heat-exchange apparatus the heat-exchange media both being liquids
A system for the discharge of evaporated product moisture from a drum dryer, comprising:
a vapour hood for collecting evaporated product moisture from the drum dryer;
a discharge fan for discharging evaporated moisture from the vapour hood;
control means to control the fan, for example to adapt a volume flow rate of the discharge fan to a volume flow rate of evaporated moisture under the vapour hood; wherein the hood sealingly engages the drum of the drum dryer.
A system for the discharge of evaporated product moisture from a drum dryer, comprising:
a vapour hood for collecting evaporated product moisture from the drum dryer;
a discharge fan for discharging evaporated moisture from the vapour hood;
control means to control the fan, for example to adapt a volume flow rate of the discharge fan to a volume flow rate of evaporated moisture under the vapour hood; wherein the hood sealingly engages the drum of the drum dryer.
The invention also provides a method for the discharge of evaporated product moisture from a drum dryer, wherein the volume flow rate of the fan is such that an interface between vapour and air is located below a top of the drum of the drum dryer.
F26B 3/20 - Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface
F26B 17/28 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve
F26B 25/00 - Details of general application not covered by group or
3.
A SYSTEM AND METHOD FOR DISCHARGING EVAPORATED PRODUCT MOISTURE FROM A DRUM DRYER
A system for the discharge of evaporated product moisture from a drum dryer, comprising: - a vapour hood (6) for collecting evaporated product moisture from the drum dryer (30); - a discharge fan (8) for discharging evaporated moisture from the vapour hood (6); - control means (20) to control the fan (8), for example to adapt a volume flow rate of the discharge fan (8) to a volume flow rate of evaporated moisture under the vapour hood (6); wherein the hood (6) sealingly engages the drum (1) of the drum dryer (30). The invention also provides a method for the discharge of evaporated product moisture from a drum dryer, wherein the volume flow rate of the fan (8) is such that an interface (17) between vapour and air is located below a top of the drum (1) of the drum dryer.
F26B 3/20 - Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface
F26B 17/28 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve
A system for the discharge of evaporated product moisture from a drum dryer, comprising: - a vapour hood (6) for collecting evaporated product moisture from the drum dryer (30); - a discharge fan (8) for discharging evaporated moisture from the vapour hood (6); - control means (20) to control the fan (8), for example to adapt a volume flow rate of the discharge fan (8) to a volume flow rate of evaporated moisture under the vapour hood (6); wherein the hood (6) sealingly engages the drum (1) of the drum dryer (30). The invention also provides a method for the discharge of evaporated product moisture from a drum dryer, wherein the volume flow rate of the fan (8) is such that an interface (17) between vapour and air is located below a top of the drum (1) of the drum dryer.
F26B 3/20 - Drying solid materials or objects by processes involving the application of heat by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact the heat source being a heated surface
F26B 17/28 - Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve
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