At the beginning of October, the RTO (regenerative thermal oxidation) post-combustion system went into operation. The highly efficient regenerative thermal oxidation process, uses energy from polluted exhaust gas, which is heated and cooled by large ceramic heat accumulators in the towers of the system. In the combustion chamber, which can be found at the top of the five towers, the exhaust gases remain at 850°C for a minimum of two seconds, reducing volatile organic carbon emissions (VOC) by over 90%.
“In combination with the mercury reduction system and the previously introduced baghouse filter, the post-combustion system sets a new standard for exhaust gas purification systems in the cement industry,” explains Florian Salzer, the operations manager of the Wietersdorf cement plant.
Facts and figures on the post-combustion system – RTO
The first parts of the post-combustion system were delivered at the beginning of 2017, and construction was commenced in March of this year. In total, almost 1,400 tonnes of material have been processed by 250 employees during 25,000 working hours. The post-combustion system consists of 52,000 ceramic regenerators, has a total surface area of 300,000 m², is 22 meters in height and has a base area of 660 m².
To follow the success of this investment, please visit the w&p Zement environmental homepage www.umwelt.wup.at.