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Difference between revisions of "Dispersion Dryers"
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[[File:Dispersion_Dryers_1.jpg|thumb|200px|right|Dispersion Dryers | [[File:Dispersion_Dryers_1.jpg|thumb|200px|right|Dispersion Dryers]] | ||
[[File:Dispersion_Dryers_2.jpg|thumb|200px|right|Dispersion Dryers | [[File:Dispersion_Dryers_2.jpg|thumb|200px|right|Dispersion Dryers]] | ||
The '''Dispersion Dryers''' are used for drying applications of wet cakes, pastes, sludges and production of powders from aqueous suspension. Due to the dewatering mechanism, these dryers provide effective solutions and converted to either filter cakes, pastes or sludges. These air dispersion dryers are chosen on the basis of wet deed cake particle size distribution of final powder and drying curve. The range of air dispersion dryers generally includes spray dryers, rotary dryers, flash dryers, spin flash dryers, vibrated fluid bed dryers and fluid bed dryer. | The '''Dispersion Dryers''' are used for drying applications of wet cakes, pastes, sludges and production of powders from aqueous suspension. Due to the dewatering mechanism, these dryers provide effective solutions and converted to either filter cakes, pastes or sludges. These air dispersion dryers are chosen on the basis of wet deed cake particle size distribution of final powder and drying curve. The range of air dispersion dryers generally includes spray dryers, rotary dryers, flash dryers, spin flash dryers, vibrated fluid bed dryers and fluid bed dryer. | ||
==Features== | |||
* Smooth functionality | * Smooth functionality | ||
* Easy operation | * Easy operation | ||
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==Features== | |||
* Material is Passage through heated air | * Material is Passage through heated air | ||
* Dryer is driven through a girth gear and tyre arrangement | * Dryer is driven through a girth gear and tyre arrangement | ||
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==Advantages== | |||
* Low operating costs* Low maintenance costs | * Low operating costs | ||
* Low maintenance costs | |||
* Ideally suited for high volumes | * Ideally suited for high volumes | ||
* High thermal efficiency | * High thermal efficiency | ||
These dryers are used to handle following material | |||
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==Features== | |||
* Easy to install | * Easy to install | ||
* High functionality | * High functionality | ||
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==Physical Properties== | |||
These materials are often characterized by having one or more of the following physical properties: | These materials are often characterized by having one or more of the following physical properties: | ||
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Typical products handled: | |||
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== | ==Operations== | ||
* Material is easily transported through the dryer due to fluidization and vibration | * Material is easily transported through the dryer due to fluidization and vibration | ||
* Fluidization velocity can be judiciously selected to minimize entertainment of the smaller :particles | * Fluidization velocity can be judiciously selected to minimize entertainment of the smaller :particles | ||
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== | ==Advantages== | ||
* Well suited for constant | * Well suited for constant | ||
* Well suited for failing rate drying | * Well suited for failing rate drying | ||
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==Principle== | |||
A peristaltic pump delivers liquid from the sample container to the 2 fluid nozzle mounted on the drying chamber. Compressed air from the inbuilt compressor is also supplied to the nozzle, resulting in atomization of the liquid into a fine spray. Air from the blower is heated by an electrical air heater and blown through the drying chamber. Due to the large surface area, drying is very rapid, resulting in a sharp drop in temperature. The dry powder particles are separated from the air in the cyclone separator and collected in the glass collection bottle. The exhaust air is directed through a flexible ss hose into the atmosphere. A bag filter can be provided for secondary powder collection. | A peristaltic pump delivers liquid from the sample container to the 2 fluid nozzle mounted on the drying chamber. Compressed air from the inbuilt compressor is also supplied to the nozzle, resulting in atomization of the liquid into a fine spray. Air from the blower is heated by an electrical air heater and blown through the drying chamber. Due to the large surface area, drying is very rapid, resulting in a sharp drop in temperature. The dry powder particles are separated from the air in the cyclone separator and collected in the glass collection bottle. The exhaust air is directed through a flexible ss hose into the atmosphere. A bag filter can be provided for secondary powder collection. | ||
==Construction== | |||
* The blower, electrical air heater, air compressor and the pump are placed in a stainless steel panel, with free and easy access | * The blower, electrical air heater, air compressor and the pump are placed in a stainless steel panel, with free and easy access | ||
* The air entering the panel is filtered through a fine cloth filter | * The air entering the panel is filtered through a fine cloth filter | ||
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== | ==Operations== | ||
The dryer has ease of operations. The inlet air temperature is precisely controlled by the inlet temperature pid controller. The panel includes: | The dryer has ease of operations. The inlet air temperature is precisely controlled by the inlet temperature pid controller. The panel includes: | ||