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Utilizing cheaper scrap and cutting emissions with WASTOX®
The WASTOX® control panel uses the oxygen lances and oxyfuel burner to combust emissions within the furnace. The Linde laser system measures the flue-gas composition on-line. Waste replaces fossile fuels
By assessing the flue gas composition, WASTOX® helps you tightly control the combustion process online. With over ten years’ experience in the development and implementation of WASTOX® technology, Linde is the undisputed innovation leader. This patented and versatile system is successfully deployed by many customers around the globe for both: single and double-pass installations in rotary salt and tiltable rotary furnaces.
Maximum combustion efficiency tests have shown that combustibles react more efficiently with a pure oxygen stream than with an oxygen-enriched flame. With an air-fuel burner, 20-50 % of the carbon on the processed scrap (used beverage cans) was emitted as volatile organic compounds (VOC). An oxygen-enriched oxy-fuel flame reduced these emissions to 1%. With an oxygen lance, combustion was almost complete with emission levels dropping below 0.01%.
Customer statement from AMAG
AMAG produces ingots for the foundry industry from its two parallel, fixed-axis rotary salt furnaces. To meet strict statutory requirements on emission levels, AMAG installed WASTOX® at both of its rotary furnaces. The oxyfuel burners are located at the charging door and the WASTOX® lances at the flue-gas opening. WASTOX® has given AMAG a cost-effective way of meeting emission regulations without having to relocate or install an expensive post-combustion system.
AMAG can melt scrap with higher levels of contamination without impacting on the quality of the final product or exceeding VOC limits (50 mg/m3 on average per half hour). If VOC levels are rising, the operator simply starts the WASTOX® lance and adapts the oxygen flow to the VOC, turning it off when levels have dropped again.
The WASTOX® lance is combined with a base supply of excess oxygen through the oxyfuel burner.
“WASTOX® is an extremely efficient, costeffective way for us to maintain tight control over emissions and keep our plants up and running. Not only does this benefit the environment, it also makes for a safer, healthier work environment for our furnace operators.”
Jo van Hinsberg, Managing Director, AMAG |
