Pyrotech Asphalt Equipment Manufacturing Co., has developed an emission control system which greatly reduces gaseous hydrocarbon and particulate emissions from its HIPR equipment. The system essentially collects and incinerates vapors and smoke emanating from the heated asphalt paving mix. Pavement heating units and heater-milling units are each equipped with emission control systems.
A shroud covers areas where vapors and smoke are generated and vacuum ducts pull the gaseous effluents into a large direct-flame afterburner. Here, combustible materials are incinerated to produce mostly carbon dioxide and water vapor. The afterburner