FLUE GAS MEASUREMENT


Due to the demanding measurement location, HeidelbergCement decided to use the reliable


rotary kiln inlet probe CEMTEC from ENOTEC Source: ENOTEC GmbH


position with the help of its control system. Furthermore, all parameters important for the probe, such as temperatures and pressures, are monitored in order to move the probe out of the process in an emergency and to prevent overheating. The CEMTEC was installed by ENOTEC in


Burglengenfeld in March 2018. The installation went off without a hitch and was completed within a few days, so that the probe reliably delivered measuring gas from the first moment of ignition. In order to keep the risk of falling caking in the kiln inlet chamber as low as possible, the probe was also protected by a refractory lining after a short consultation between ENOTEC, the on-site installation company and HeidelbergCement, which proved its worth in subsequent operation. The probe provided reliable measured


values from the first day and thus supported the commissioning and optimisation of the kiln: "Due to the conversion, many values were new for us, but the CEMTEC values at the kiln inlet chamber are an enormously important indication of how the kiln is running. They


enabled us to understand the converted kiln quickly and well," Hamar explained. After about one year of operation, it could


be established beyond doubt that the probe and cold-extractive measurement provided reliable and representative readings without any problems and without much need for maintenance. After 12 months, a regular annual maintenance of the system was carried out, during which only the filter was changed and wearing parts were replaced. Overall, in over two years of operation, the probe has now reliably provided sample gas 90 per cent of the time, allowing the kiln to be continuously monitored and controlled. Even in one case where the analysis results did not seem plausible, the shift personnel, with the support of ENOTEC, were able to quickly verify that the readings from the kiln inlet probe were correct and identify the problem on the kiln itself shortly afterwards. "ENOTEC provides one of the most reliable systems in the plant with their CEMTEC probe. The maintenance requirement is very low and simple," confirmed Norbert Beer, master electrician at


HeidelbergCement. With the help of CEMTEC, HeidelbergCement


was able to achieve all modernisation goals within a very short operating time. The stricter limits for nitrogen oxides and ammonia emissions, which have been in force since 2019, can be safely complied with, and the product quality could be maintained at a high level despite the extensive construction project. In addition, the proportion of secondary fuels has been continuously increased and will reach the targeted 80 percent in the near future.


ENOTEC www.enotec.de


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