Patent ID: 11885487
Assignee: NEM ENERGY B.V.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. A heat recovery steam generator of vertical design, comprising:
an exhaust-gas channel in which at least one economizer heating surface with economizer inlet and economizer outlet and at least one evaporator heating surface with evaporator inlet and evaporator outlet are arranged,
wherein the at least one economizer heating surface and the at least one evaporator heating surface are connected to one another in such a way that, on a feed water side, the at least one economizer heating surface is arranged upstream of the at least one evaporator heating surface, such that the economizer outlet is in fluid connection with the evaporator inlet,
wherein a water/steam separator is arranged on the feed water side downstream of the at least one evaporator heating surface,
wherein an excess pipe length system is arranged outside the exhaust-gas channel and on the feed water side between the at least one economizer heating surface and the at least one evaporator heating surface,
wherein the excess pipe length system is designed in such a way that, after a complete filling of the at least one economizer heating surface, feed water, in a riser of the excess pipe length system, reaches an overflow and thus passes into the at least one evaporator heating surface via a down pipe,
wherein a vent line with a vent valve branches off the overflow of the excess pipe length system,
wherein a first filling line and a first valve are arranged between an economizer filling outlet, arranged downstream of the economizer inlet of the at least one economizer heating surface, and the evaporator outlet of the at least one evaporator heating surface,
wherein the first filling line leads to the evaporator outlet of a last evaporator heating surface and the first valve is arranged in the first filling line, and
wherein a connecting line interconnects the evaporator outlet of the last evaporator heating surface and the water/steam separator, and the first filling line leads to the connecting line and the first valve is arranged in the first filling line.