초록 ▼

An apparatus for the treatment of 100% reclaimed asphaltic pavement (RAP) uses low temperatures and no direct radiation from a burner flame to the RAP. The RAP is first heated in a counter flow drum which is supplied with hot combusting gases generated by a remote low NOx burner. The temperature of

An apparatus for the treatment of 100% reclaimed asphaltic pavement (RAP) uses low temperatures and no direct radiation from a burner flame to the RAP. The RAP is first heated in a counter flow drum which is supplied with hot combusting 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 counterflow design of this invention.

대표청구항 ▼

[ We claim:] [1.] An apparatus for the manufacture of a hot mix asphalt (HMA) from a recycled asphalt pavement (RAP) comprising:(a) a counter flow rotary drum dryer for heating said RAP to a desired temperature, said RAP flowing through said drum dryer, said drum dryer having two opposite ends and c

[ We claim:] [1.] An apparatus for the manufacture of a hot mix asphalt (HMA) from a recycled asphalt pavement (RAP) comprising:(a) a counter flow rotary drum dryer for heating said RAP to a desired temperature, said RAP flowing through said drum dryer, said drum dryer having two opposite ends and comprising:(i) a RAP output,(ii) a RAP input,(iii) an input for entering combustion gases having desired temperatures and which flow thereafter in the drum dryer, and(iv) an exhaust output for combustion gases and vapors; said combustion gases and vapors having desired temperatures;(b) means for supplying said RAP to said RAP input,(c) a low NO.sub.x burner connected to said drum dryer for producing a flame; said burner positioned with respect to said drum dryer in such a way that the flame does not directly radiate energy to the RAP flowing through said drum dryer;(d) a means for supplying combustion air to an air inlet of the burner; and(e) a combustion gas air supply means for supplying a quantity of cooling air immedediately ahead of said burner and for producing complete combustion of fuel at a temperature which is below that which produces significant measurable NO.sub.x in the combustion gases;wherein said exhaust and RAP outputs are located on said opposite ends of said drum dryer.