Astec designs equipment to control the emissions that can be created in the Hot Mix Asphalt (HMA) production process. Baghouses and cyclones capture the dust from the drying process so it can be fed back into the mix. Blue smoke systems route the haze that can escape at mix transfer points back to the burner to be incinerated, and sound suppressors minimize the sound level emitted by running machinery. This equipment lets producers continue to compete in an age of heightened environmental awareness and increased regulations.
Pulse Jet Baghouses
Astec baghouses deliver superior performance and efficiency, while helping your facility meet the most stringent clean air standards. They remove particulates from the exhaust stream to efficiencies greater than 99.5%, and lower emission to less than one quarter of EPA standards.
Reverse Pulse Baghouses
Astec has designed the Reverse Pulse™ baghouse. Modular in design, the baghouse can be fitted to your exact size requirements. The Reverse Pulse™ baghouse is available in a range of sizes from 5,000 to over 100,000 ACFM. It is a ruggedly constructed system; manufactured out of 3/16” corrosion resistant steel plating.
Astec stand-alone vertical and horizontal primary collectors are highly efficient and easily retrofitted to existing facilities or to replace old collectors. Horizontal collectors my be skid-mounted to make them portable and to eliminate the need for concrete foundations. Vertical collectors are also available and may be mounted above the drum if necessary. Models are available 6 to 12 feet in diameter. Options include rotary airlocks, tipping valves and ceramic liners.
Blue Smoke Systems
Liquid asphalt cement, the "glue" used to hold the rock aggregate together in hot mix asphalt, is a petroleum by-product. At certain spots in the process, a haze of hydrocarbon droplets can escape. This haze is called "blue smoke." Astec provides complete systems to capture and dispose of blue smoke. Silo top and loadout area systems are available. Powerful fans route the hydrocarbons either to the drum burner for incineration or to mist collection units.
Expertly designed shielding devices minimize the sound level created by neighborhood asphalt facilities. Astec sound suppression equipment shields burner blowers, exhaust stacks, air compressors, and drum drives to reduce sound levels at the facility. This reduces decibel levels at the typical property boundary to that of normal conversation.