Hot-mix asphalt manufacturing system and method
US6832850B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Jan 30, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2019/109
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hot-mix asphalt manufacturing system includes a counter-flow rotary dryer having a combustion chamber, an inlet for dry ingredients, an outlet for hot-mix asphalt, and a pollution control device. The pollution control system includes a pre-filter, a cooling device and a fiber bed filter. Combustion gases from the combustion chamber are directed onto the ingredients for the hot-mix asphalt without substantial introduction of excess air or recirculated air and contact the hot-mix asphalt at a temperature substantially equal to the temperature of the combustion gases. The pollution control system removes substantially all particulates and hydrocarbons from the emissions from the hot-mix asphalt ingredients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.