The Double Barrel dryer/ mixer is a combination aggregate dryer and hot mix asphalt mixer with the ability to run up to 50 percent reclaimed asphalt pavement (RAP) with no added fuel cost. While the virgin material is dried in the main drum, RAP is injected into the outer mixing chamber, never coming into direct contact with the hot gas stream of the dryer, reducing potential for increased blue smoke emissions.
Virtually all heat produced by the burner is utilized in the drying and mixing process. Heat used in the superheating process is captured in the outer mixing chamber and utilized in the blending of mix materials.
When injected into the outer mixing chamber, RAP is heated by virgin aggregate that has been superheated in the inner drying chamber. This method has two benefits: excess moisture is removed from the RAP, and the reclaimed liquid asphalt partially coats the virgin aggregate.
Virtually all heat produced by the burner is utilized in the drying and mixing process. Heat used in the superheating process is captured in the outer mixing chamber and utilized in the blending of mix materials.
When injected into the outer mixing chamber, RAP is heated by virgin aggregate that has been superheated in the inner drying chamber. This method has two benefits: excess moisture is removed from the RAP, and the reclaimed liquid asphalt partially coats the virgin aggregate.
