Patent ID: 8474261

Claim:
A steam generation system comprising: a main steam generator having a fluctuating steam production; a superheater which comprises a main heat source for heating the superheater by a main stream of heating gasses, in which the main stream of heating gasses is guided by a gas conduit and extends from the main heat source along the superheater to an open end of the gas conduit; and a back-up evaporator for evaporating supplied water into steam to compensate for fluctuations in the steam production of said main steam generator, which back-up evaporator is connected in parallel with the main steam generator, in which both said main steam generator and said back-up evaporator are in fluid communication with said superheater for superheating generated steam; wherein a separate auxiliary heat source is provided for heating the back-up evaporator by an auxiliary stream of heating gasses and a control system for controlling the auxiliary heat source, wherein the back-up evaporator is positioned outside the main stream of heating gasses.