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Difference between revisions of "Belt Dryers"
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* Please start editing this page after the /noinclude | * Please start editing this page after the /noinclude | ||
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[[File:Belt_Dryers_1.jpg|thumb|right|200px|Belt Dryers | [[File:Belt_Dryers_1.jpg|thumb|right|200px|Different Parts of Belt Dryers]] | ||
[[File:Belt_Dryers_2.jpg|thumb|right|200px|Belt Dryers | [[File:Belt_Dryers_2.jpg|thumb|right|200px|Belt Dryers]] | ||
The '''Belt Dryers''' are | The '''Belt Dryers''' are machines which are used for continuous drying materials using hot gases or radiation. | ||
== Working principle == | ==Working principle== | ||
A Belt dryer | A Belt dryer is a device designed for the particularly gentle thermal treatment of product. The wet product is continuously and evenly applied through an feed chamber onto a perforated belt. The belt, predominantly in horizontal position, carries the product through the drying area which is divided into several sections. In these cells drying gas flows through or over the wet product and dries it. Each cell can be equipped with a ventilating fan and a [[Heat Exchangers|heat exchanger]]. This modular design allows the drying and cooling temperatures to be controlled separately in the different sections. Thus, each dryer cell can be individually controlled and the drying / cooling air flow can be varied in each cell. In addition, the speed of the conveyor belt can be varied what gives an additional parameter for setting of drying time. | ||
The wet product is continuously and evenly applied through an | |||
The cells can be heated or cooled directly or indirectly, and all heating media, such as oil, steam, hot water or hot gas can be used. | The cells can be heated or cooled directly or indirectly, and all heating media, such as oil, steam, hot water or hot gas can be used. | ||
== Design features == | ==Design features== | ||
Belt dryers / [[Belt Coolers]] are designed in modular system. Each belt dryer consists of infeed head, [[Conveyor Belts|conveyor belt]] and discharge end. | Belt dryers / [[Belt Coolers]] are designed in modular system. Each belt dryer consists of infeed head, [[Conveyor Belts|conveyor belt]] and discharge end. | ||
Different kinds of dryers are possible to construct, e.g. | Different kinds of dryers are possible to construct, e.g. | ||
* Single-belt dryer | * Single-belt dryer | ||
* [[Multi Stage Dryers]] | * [[Multi Stage Dryers]] | ||
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== Ventilation options == | ==Ventilation options== | ||
In general there are two ways of gas flow pattern. The drying air can flow, according to the treatment process, either through or over the product. | In general there are two ways of gas flow pattern. The drying air can flow, according to the treatment process, either through or over the product. | ||
== Exemplary conveyor options == | ==Exemplary conveyor options== | ||
* Chain-guided wire [[Mesh Belt Conveyors|mesh conveyor]] | * Chain-guided wire [[Mesh Belt Conveyors|mesh conveyor]] | ||
* Chain-guided hinge slat conveyor | * Chain-guided hinge slat conveyor | ||
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== Feeding variations == | ==Feeding variations== | ||
* Granulating mill – filter cake or amorphous and paste-like products respectively | * Granulating mill – filter cake or amorphous and paste-like products respectively | ||
* Slewing belt conveyor – sensitive and free flowing products | * Slewing belt conveyor – sensitive and free flowing products | ||
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== Typical applications == | ==Typical applications== | ||
Belt dryers are predominantly used in the following industries: | Belt dryers are predominantly used in the following industries: | ||
* Chemical Industry | * Chemical Industry | ||
* Pharmaceutical industry | * Pharmaceutical industry | ||
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==Video== | ==Video== | ||
<youtube> | <youtube>3gI6UoRVqF4</youtube> | ||
<youtube> | <youtube>xJP7fn2aAA8</youtube> | ||