Difference between revisions of "Direct Heated Dryers"

The '''Direct Heated Dryers''' follow the direct heating or drying process. This Direct heating and drying refers to combustion products mixing directly  with the process environment (typically process solids and a forced  “air” stream). Because radiation transfer is rapid, typically at high  temperature, and ceases upon reaching a boundary (the outer layer of  process matter), it is often undesirable and unnecessary. Therefore, natural and forced convection heat transfer engineering may dominate  dryer designs. There are a wide variety of process dryers, kilns,  calciners, ovens, etc. that incorporate an even greater range of  combinations in forced convection, radiation, and conduction (through  the material) heat transfer principles to satisfy the product  requirements.

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