Heat sticks Heater

In order to enhance the drying rates in the rotary dryer without raising the gas temperature or gas flowrate excessively, it is possible to introduce steam heated mbes or coils within the shell. Aside from providing additional energy for drying, such internals can also help with redistribution or delumping of the material. Of course, it is possible to use internal heaters only if the material does not stick to the walls of the internals. 

In the future, the amount of heat associated with the calcination reactions should be included in both the energy and CFD analysis to provide greater accuracy in the simulations. The physical behavior of the granule, such as sticking, under various temperatures should also be measured. Both analyses are useful in defining an initial pre-heater concept. In addition, a more detailed CFD analysis can be used to accelerate the pre-heater design process and better understand flow and heat transfer within various conceptual designs. 

Figure 8. Hand gun for hot-melt (system lang) a) Adhesive stick b) Feeding c) Retaining ring d) Seal e) Melting chamber f) Nozzle g) Wedge heater or heating wedge h) TVigger...

---