Fuel Oils
Deposit formation in oil burners
Modern and low-emission liquid fuel burners make use of partial premix or premix fuelmixture
generation. This is a vital criterion in order to achieve low-emission combustion.
Transition to gaseous phase must take place prior premixed combustion of liquid fuels. Heat
is transferred to the fuel during this process, starting to the auto oxidation reaction inside the
fuel that may lead to the formation of carbon deposits. Polymers with a high boiling point are
the products of this radical induced reaction and they remain as deposits upon the surface of
the evaporator.
Investigations about the formation of these deposits were conducted in a partial-premixing
combustion system as well as in a premixing combustion system. The impacts of the parameters
temperature, air/fuel ratio, mode of operation, and different fuel properties were
investigated during this process. Dependencies on single parameters were determined by
the use of idealised test rigs. Dependency on the temperature was proven by the vaporization
of single fuel drops and correlated to results from premix combustors.
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