Success with SCR

Based at Pederobba in northern Italy, cement manufacturer Industria Cementi Giovanni Rossi S.p.A. has been producing cement and hydraulic binders for over 90 years. Sustainability and ecological practices are important values in the corporate philosophy of the Cementirossi Group. In line with this sustainable approach, Cementi Rossi uses technologies that combine production requirements with environmental concerns.

Stricter emissions limits

Until December 2022, Industria Cementi Giovanni Rossi S.p.A. used a SNCR system to reduce nitrogen oxide (NOx) as part of flue-gas cleaning measures. In January 2023, the rules on emissions limits at the Pederobba site in Italy became more strict, meaning it was no longer possible to observe the NOx limit values reliably.

Flue-gas cleaning was previously achieved using an SNCR system. In order to reduce emissions, urea pellets were injected at the heat exchanger tower, meaning NOx was reduced without any catalytic reaction.

To ensure the stricter emissions limits could be reliably met, it was necessary to find a new solution.

A custom solution

To achieve the required emissions limit values, environmental specialist Scheuch installed a custom SCR tail-end tower. The company has developed a concept that was precisely tailored to the customer’s requirements. In December 2020, the order for a SCR tail-end tower system to reduce flue gases was confirmed. From December 2020 to February 2022, Scheuch worked hard to plan and implement the exhaust gas cleaning solution, which was specially adapted to the cement manufacturer’s requirements. The system layout was defined together with the customer. The automation and visualisation elements were implemented by the customer on the basis of a functional description provided by Scheuch.

The optimal solution was developed by taking account of a host of relevant parameters, as well as the local conditions. The customer’s site is located in an earthquake zone and a nature conservation area. Glossy surfaces had to be avoided for reasons of environmental protection and animal welfare. Noise protection measures were also implemented so that a sound pressure level of 65 dBA as a limit value was not exceeded at a distance of 1 mm.

This state-of-the-art system will also enable future emissions limits for NOx and ammonia (NH₃) to be reliably met. The system makes it possible to reduce NOx, NH₃ and TOC by up to 65%. Moreover, the system is a significant addition to the Scheuch product range for exhaust gas cleaning.

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Read the article online at: https://www.worldcement.com/special-reports/15112023/success-with-scr/