Recycled asphalt drum dryer having a low NO.sub.x burner
US5810471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1994 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jan 14, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2019/1095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.