Online corrosion monitoring for the combined combustion of coal and chlorine-rich biomasses in pulverised fuel and circulating fluidised bed systems

The main goal of the project was to develop online corrosion sensors in pulverised (PF) and circulating fluidised bed (CFB) combustion systems in order to fire biomass and other low-grade fuels safely at high portions in power plants. Another important goal was to find protective effects from coal in power plant furnaces during co-firing biomass and other low-grade fuels. The obtained results helped significantly to understand the information derived from corrosion sensors, which is essential to their integration for power plant process control. The studied sensors already in their present form have potential for power plant control. Due to the complicated character of signal formation and some needs to change particular details in the sensor construction, further development work would be useful. Optimising the sensitivity and availability to long-lasting reliable operation in very difficult environments would be key issues. The project results can also be utilised to re-consider the role of coal in energy production. The new idea to use coal as a protective agent ensuring biomass firing at very high portions instead of considering coal only as a co-firing fuel, can improve acceptance and public opinion to the use of coal in biomass power plants. The addition of coal in many biomass power plants has been forbidden so far due to fossil CO2 formation, which can prevent the utilisation of many potential biomass fuels in those plants. Experimental work was first conducted with pilot-scale pulverised fuel and circulating fluidised bed reactors with various sizes. The obtained results, refined further with modelling tools, were successfully used to conduct the power plant tests.     «

The main goal of the project was to develop online corrosion sensors in pulverised (PF) and circulating fluidised bed (CFB) combustion systems in order to fire biomass and other low-grade fuels safely at high portions in power plants. Another important goal was to find protective effects from coal in power plant furnaces during co-firing biomass and other low-grade fuels. The obtained results helped significantly to understand the information derived from corrosion sensors, which is essential to...     »