Steam generator having a superheater tube bank
AssigneeSulzer Brothers Limited
InventorKarl Rees
Life of this patent
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Abstract
The steam generator has a combustion chamber which merges at the top into a combustion gas flue having walls in the form of evaporator tubes. A superheater tube bank is suspended in the combustion gas flue in front of the evaporator tubes. The superheater tubes are connected together in pairs to a common inlet at a lower end which passes through the evaporator tube banks while the evaporator tubes of the combustion chamber are connected in pairs to a single evaporator tube within the flue. Retaining elements are provided to form a moving connection between the superheater tubes and the evaporator tube and provision is made to compensate for differences in expansion between the superheater tubes and the evaporator tubes at the top end of the superheater tube bank.
Claims13
In a steam generator, the combination comprising
- a combustion chamber having at least two walls of evaporator tubes;
- a gas flue above and in communication with said combustion chamber, said flue having at least two walls, each said wall including a plurality of evaporator tubes and webs securing said tubes together in seal-tight manner;
- a plurality of forked connectors at a lower end of said flue, each connector connecting a respective pair of adjacent evaporator tubes of said combustion chamber walls to a respective evaporator tube of said gas flue walls;
- a bank of vertical superheater tubes disposed in said gas flue over said evaporator tubes;
- and
- a plurality of forked elements at a lower end of said bank of said superheater tubes, each said forked element having a bend extending through a respective web between an adjacent pair of said evaporator tubes of said gas flue walls and being connected respectively to a pair of said superheater tubes to distribute a working medium therebetween.
In a steam generator, the combination comprising
- a combustion chamber having at least two walls of evaporator tubes;
- a gas flue above and in communication with said combustion chamber, said flue having at least two walls, each said wall including a plurality of evaporator tubes and webs securing said tubes together in seal-tight manner, each evaporator tube of said gas flue being connected in common at a lower end to a respective adjacent pair of said evaporator tubes of said combustion chamber;
- a bank of vertical superheater tubes disposed in said gas flue over said evaporator tubes, each pair of adjacent superheater tubes being connected in common at a lower end to a bend extending through a respective web of said gas flue walls.
Dependencies are inferred from the claim text.