When it comes to buying an industrial dryer, people are often faced with the decision to choose between a rotary dryer, and a fluid bed dryer. Though the choice between the two can be material specific, ultimately, each dryer has its advantages and disadvantages, and the decision often comes down to customer preference. Historically, rotary Read More…
At Feeco International, we know that down time means money lost. That’s why we’ve developed our unique “unitized” drive base. We developed this unitized base with adjustment sole plate to minimize turn-around time not only during installation, but also during routine maintenance. This time-saver can be used for rotary kilns, rotary dryers, rotary calciners, rotary Read More…
Another key phase in rotary dryer design is determining the best flights to use inside the rotary dryer. Flights are like specially designed fins, that pick up the material as the rotary drum rotates, and then gradually drop the material through the stream of gas, like a clothes dryer. This falling of the material is Read More…
Another characteristic to look at is the size of pellets. This will combine with specific heat, heat transfer, and percent moisture to help determine the retention time, or the amount of time the material needs to be in the dryer. In turn, the retention time will help determine the needs of a rotary dryer. Retention Read More…
What does atmosphere have to do with rotary dryer design, you ask? Well actually, a lot. The needs of a rotary dryer can differ greatly from region to region, due to different climates. Things like humidity, temperature, and elevation can play a big part in determining the specifics of your rotary dryer. Let’s take humidity Read More…
After you have determined the characteristics of your material, it is necessary to look at the limitations set by your material, as these too will play a part in the design of the rotary dryer. For example, some materials may not be able to come into contact with oxygen. In this case, an indirect rotary Read More…
The heat transfer properties of a material are also important to be aware of before sizing up your rotary dryer. It is possible for two materials to have the same percentage of moisture, but very different heat transfer properties, which will call for different drying needs. Let’s look at an example. Let’s pretend that glass Read More…
Another key factor in sizing a rotary dryer is determining the specific heat of a material. Specific heat is defined as how much energy it takes to raise 1 gram of material 1 degree Celsius. In more simple terms, it’s how resistant a material is to heating. Materials can have very different values of specific Read More…
Bulk density is another characteristic that is important to know when sizing a rotary dryer. Bulk density is the weight of a material per a specific volume. Typically, this is calculated in pounds per cubic foot in US units or kg/m3 in metric units. Let’s say you have something that is 50 lb./ft3. This means Read More…
So you are in need of a rotary dryer. Where do you go from there? There are a lot of factors that come into play when determining the needs of a rotary dryer, and determining your needs can easily become overwhelming. Take it a step at a time: we’ve developed this series to help you Read More…
