Anyone operating a biomass power plant recognizes the importance of achieving a stable power output in spite of fluctuations in the fuel supply. Power plants that can handle multiple fuels simultaneously, or indeed sequentially, for example both woody and straw biomass, offer greater flexibility and lower dependence on a single fuel source. However, when mixing fuels the variations in properties such as moisture content, ash content and fusion temperatures pose specific challenges to the plant performance and require modifications to the boiler design.
DP CleanTech has focused significant resources on optimizing the ‘mixed fuel’ or ‘multifuel’power plant solution which is typical for many requirements in emerging markets.
The design of the power plant must be able to handle the different feedstocks - from the storage barn to the feeding system, even before the combustion takes place. The specific boiler design must take account of the likely fuels, but may be referred to as a mixed fuel or a multifuel boiler design. DP will engineer dual feeding systems and make boiler modifications specific to the fuel mix. Today, DP CleanTech has 25 mixed fuel power plants in operation around the world.