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Flue gas of a biogas co-fired steam boiler cooled below the acid dew point without any corrosion issues.
Within the Together Towards ZERO program, Carlsberg strives to make their breweries more sustainable. One of the steps taken in their Ukraine brewery is using a biogas fired steam boiler.
Due to the usage of biogas, high concentrations of sulphur elements can be found in the flue gas. If the flue gas is cooled down, these sulphur components condense and form sulphuric acid which is very corrosive. To prevent this from happening, Carlsberg operated their system such that the flue gas was at a high temperature (>140 °C) leaving the stack. Additional heat present in the flue gas was not used.
HeatMatrix installed a polymer air preheater which allowed Carlsberg to cool to temperatures below the acid dew point and achieve additional heat recovery on their steam boiler. There are no corrosion issues because of the corrosion resistance of the polymer used in the HeatMatrix air preheater. Based on the success in Ukraine, Carlsberg Serbia introduced the same solution on their biogas fired boiler.
Our process engineers assess the technical feasibility of additional heat recovery on your Steam Boiler, or any other thermal process. Your potential reduction in CO2 emissions, energy consumption and costs is determined by our experts.