INDIRECT HEAT DRYERS
Indirect heat dryers are unique pieces of equipment that are designed to provide a method to dry, calcine, or otherwise process materials in a controlled (oxygen lean) atmosphere.
The selection of an indirect heat dryer is not made lightly as they are both expensive and inefficient. However, they provide an ideal solution if you have a product that is affected by the products of combustion, or require a certain temperature to effect processing, while remaining in a controlled process atmosphere. It is for these reasons why the units are sometimes known as calciners.
Processing of low density or otherwise fine materials is also a significant challenge. These types of materials are easily aspirated from, or degraded in, a conventional direct fired, or direct heat dryer, therefore leaving little time to be brought up to temperature. The Louisville Dryer Indirect Heat Dryer provides the perfect tool to accomplish each of these tasks as effectively as possible.
Process Advantages
• Product is isolated from the burner flue gases.
• Material is heated through radiation and conduction.
• Processing material is contained in an atmosphere that can be controlled through the introduction of nitrogen or other gas to facilitate or retard a reaction inside the rotating drum.
