|Double Barrel Phoenix Burners|
The innovative Astec Double Barrel® dryer/drum mixer is designed to reduce emissions and minimize oxidation in the mixing chamber. The result is a better mix and easier permitting.
Run Clean, Even With 50% Rap
RAP enters directly into the mixing chamber and does not contact the hot gas stream of the dryer. This is an important advantage because the atmosphere in the mixing chamber minimizes emissions. The Double Barrel dryer/drum mixer runs clean, even at 50% RAP. Using recycle materials can produce significant savings without any loss of mix quality and without causing any visible emissions from the baghouse. Astec baghouse stack emissions meet federal standards even when high temperature (330°F) mixes are made.
Oxidation in the mixing chamber is minimized in the Double Barrel drum mixer. As recycle heats in the mixing chamber by contact with the hot aggregate, moisture in the recycle is driven off as steam. The steam atmosphere in the mixing chamber allows very little free oxygen and gas movement. Although steam may react with the liquid asphalt and vaporize some light oils, these vapors are drawn into the burner flame and incinerated. The same is true for emissions created by additives to Superpave or other modified mixes.
Choose A Burner Option
The Astec Phoenix® burners improve efficiency and produce low emissions of NOx, CO and other combustion-related volatile organic compounds (VOC's). A special combustion system for extra low NOx, CO and VOC's is also available. The Phoenix burners dramatically reduce combustion noise by using variable frequency drives (VFD's) to control blower speed. Reduce noise further by adding an optional blower inlet silencer. Baghouse stack silencers are also available.