Cofiring in Boilers

Co-firing or Co-combustion refers to the combustion of two fuels simultaneously.  For example, biomass fuel can be burnt with coal.  In paper plants, the pith, which is a byproduct of the manufacturing process, can be burnt along with coal.

The fuel which is added to the main fuel is called additional or auxiliary fuel.

Co-firing has many advantages. Co-firing is cheap as it uses fuel which would otherwise have gone waste.  This reduces the cost of steam generation.

Co-firing also has environmental benefits.  Co-firing results in more efficient combustion.  The green house gases emitted are lesser than those emitted when burning a single fuel.

In certain countries, the governments incentivize cofiring as it is beneficial to the environment.