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Basic knowledge required for optimization of the drying process

3-6.Importance of dehydration

Energy for evaporating the water 1kg of 20 ℃ is 2454kJ. 1KW/h is 3600kJ so…. 2454kJ is the working time and energy consumption of the same amount running 40 minutes of 1kw motor. Or, the halogen heater 5kw 85% efficiency ...

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3-5.Balance of the process

When dry quickly at high speed wet material, deviation of the moisture content and temperature of the material inside will increase. As a result, the critical moisture content is increased, it may cause cracks. When it comes to the state ...

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3-4.Five patterns of the drying curve

As for the Drying characteristic curve of the Decreasing drying rate period, five patterns appear with the characteristic of material. The type of material The composition of material The shape of material The possession state of water A-Type A-type is ...

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3-3.Heat balance equation of the drying

The heat balance is the sum of 4 types heat、which is entering heat, exiting heat, generation of heat, and endothermic. By the law of conservation of energy, the quantity of these (Quantity of heat change of the system) = (Quantity ...

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3-2.Evaporation of water

In order to move water vapor becomes water evaporates, the water vapor pressure difference is required between the air and the convection layer and the surface of the material. Water vapor of the material surface so that the saturated pressure ...

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3-1.Heat transfer and Mass transfer

In the classification of thermodynamics, a dry process is a “The open system.” Dryness is “evaporating and separating a liquid from a solid.” Heat and pressure are operated, water is evaporated and it moves. The height of heat is the ...

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