The invention relates to a method for creating a continuous carrier gas/steam vapour flow. The method comprises the step of providing a metered first carrier gas stream and wherein the portion of steam in the carrier gas/steam mixed gas stream needs to be set to zero as the carrier gas/steam mixed gas stream; providing a metered second carrier gas stream, providing a metered, vapor-saturated, carrier gas/steam mixed gas stream, mixing both to provide a first gas-like mixed gas stream, and setting the steam share in the carrier gas/steam mixed gas stream to be set Relatively low as a carrier gas/steam mixture; providing metered liquid stream and feeding it to an evaporation/mixing device to evaporate the liquid and mix with the first gas-like mixed gas stream to provide a second gas-like mixed gas stream, and the steam fraction in the carrier gas/steam mixed gas stream needs to be set relatively high as a carrier gas/steam mixed gas stream.