With its ideal product for flue-gas scrubbing at coal-fired power stations, Outokumpu facilitates 88-percent capture of sulfur dioxide at Enel’s top-of-the-art power station in Italy, designed to put coal power on a sustainable course.
Torrevaldaliga Nord points to the future of coal-fired power generation. Employing the most advanced technologies available, the plant is one of the most efficient in its class and one of the cleanest worldwide. Sulfur dioxide and particulate emissions are both down by 88% and nitrogen oxide emissions by 61% from the previous oil-fired operations. Overall, emissions will be 50% below the limits set down by the EU legislation.
Sulfur dioxide is a severe pollutant when released into the atmosphere, guilty of acid rain. At refurbished Torrevaldaliga Nord, sulfur dioxide is removed from the coal combustion flue gas in absorber towers (“desox” towers), where this acid is scrubbed off with calcium carbonate acting as a neutralizing agent.
To counter these harsh conditions at the Torrevaldaliga Nord coal power plant, Enel selected Outokumpu’s super-austenitic 1.4565 steel. The grade has been specifically developed for these working conditions. The core of the absorber towers is built entirely out of 1.4565 plate from Outokumpu.
Enel decided to use Outokumpu based on a previous positive experience of using the grade for a similar application at two Enel plants in Italy; La Specia in 2001 and Brindisi in 2002.
As a result of the new absorber towers, sulfur dioxide and particulate emissions are both down by 88 percent. And nitrogen oxide emissions are down by 61 percent from the previous oil-fired operations. Overall, emissions will be an impressive 50 percent below the limits set down by the EU legislation.
Torrevaldaliga Nord’s remaining two units are under construction with similar absorber towers, being built using the same Outokumpu material. At the same time, a similar but smaller coal power facility is under construction by Enel in Fusine near Venice, employing the same material.
Enel’s plans for clean coal technology are ongoing. The company is working towards zero-emission from coal power generation, developing methods for the capture and safe containment of carbon dioxide.
Outokumpu will continue to help effect improvements in the global environment offering products that take advantage of cleaner energy sources like coal power, that fight the toughest industrial conditions.