Application and Heat Resources of Rotary Drying Machine

A rotary drying machine is a device that uses rotation, gravity and warm gasses to dry a material. These driers range from small household clothes dryers to large industrial systems. Regardless of their size, the majority of rotary dryers work the same way. A drum rotates and moves material while hot gasses quickly dry it out.

Rotary dryer is suitable for a wide variety of products, ranging from granular, powdered and crystalline materials, through to filter cakes and sludges for the food, chemical and mineral industries. Rotary cooling machines are either of the counter-flow cascade type, for coarse and granular materials or are indirectly water cooled for fine and dusty products. Rotary calciners may be of the direct-fired refractory lined or unlined type, or indirectly heated in the same way as the dryers. According to different dryer materials, there are flour dryer, fertilizer dryer, cement rotating dryer, sand dryer, limestone dryer and so on.

There are several different gasses used in rotary dryers. In commercial or industrial dryers, nearly any gas can be used, but the more common ones are exhaust fumes and various inert gasses. In these dryers, the main concern is possible contamination of the work material and the maximum heat of the used gas.

The directly heated rotary drum dryer operates on the principle of lifting and showering the product through a hot gas stream moving either in parallel or counter-flow. In the indirect dryer, which is more suited to fine and dusty materials, there is little or no contact between the product and the drying gases since they are heated from the outside, via a stationary jacket fitted with either multiple burners or other external heat source.

For greater thermal efficiency and where inertisation is required, recycling of exhaust gases can be used. This can be implemented on all our airstream drying systems and retrofitted on customer”s existing drying operations.

Since its inception, roller dryer has been widely recognized and trusted by customers, which creates enormous economic benefit for enterprises. Hongxing Machinery is the manufacturer that always make customers reliable and rest assured. For many years, Hongxing Machinery adheres to the principle of using technological progress to ensure quality enhancement of products, which brings real benefits to customers and realizes win-win situation between customers and company. For more information about our products, please sent us emails to, we will contact you as soon as possible.

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