Germany: Reduction of CO2 Emissions Solvay to Replace Coal-Fired Boiler with Biomass Plant

Aalborg Energie Technik assists Solvay in replacing a coal-fired boiler plant with a new AET Biomass Boiler. The 90 MWt plant is to be installed in Rheinberg, Germany, were it will help the company lowering the CO₂ emissions by 190,000 tonnes/year.

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Aalborg/Denmark — With a high efficiency cogeneration plant, called the Woodpower project, in Rheinberg (Nordrhein-Westphalen), Solvay is to reduce the use of fossil fuel by 25 % at the site. The investment is a part of the company's strategy to serve their customers in a more sustainable and competitive way.

The Biomass Boiler will burn recycled wood, which will be sourced locally. It will be designed for a fuel heat input of 90 MWt and a boiler efficiency of 92 %. The scope of supply includes a Combustion System, a Biomass Boiler, an SNCR Denox System, a flue gas cleaning system, a boiler house, an electrical system, as well as a PLC control and a Scada system.

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The Combustion System and Biomass Boiler will be optimized for the project and are similar in design to the boiler at Tilbury Green Power, which was recently commissioned by AET. The boiler is designed with a residence time of two seconds at 850 °C and with Inconel cladding in the furnace to protect against corrosion.

The Biomass Boiler has a short start-up time and a quick shut-down time as there is almost no refractory in the boiler. This also reduces the risk of slagging, reduces the cost of maintenance considerably and at the same time increases the availability.

The in-house power consumption for the boiler island, including flue gas cleaning, fans etc. is less than 1.3 % of the fuel heat input. This enables the customer to produce more power for export and/or own factory.

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