Drum dryer for reprocessing recycled asphalt pavement

摘要

An apparatus for the treatment of 100% reclaimed asphaltic pavement (RAP) is shown and described. The RAP is first heated in a counter flow drum which is supplied with hot combustion gases generated by a remote low NOx burner. The temperature of the drum input gases is preferably around 1100 degrees F and the output temperature of the gases may be 100 degrees F or less greater than the input temperature of the RAP. The RAP may be heated with a microwave oven to raise the RAP to a final temperature, although this step is not absolutely necessary in the counter flow design of this invention.