Injection cooler for steam power plant

Claim 2

Injection cooler for steam power plants comprising a substantially hollow tubular member having a steam inlet and traversable by cooling steam supplied thereto through said steam inlet, at least one nozzle located in said tubular member in the vicinity of said steam inlet, and passage means disposed along the inNer surface of said tubular member for supplying injection water to said nozzle, said passage means comprising en elongated tube formed so as to surround the cooling steam supplied through said inlet and to shield said inner surface of said tubular member therefrom.

Claim 3

Injection cooler according to claim 1, wherein said passage means is of such construction as to form a protective tube in the injection cooler whereby injection injection water drawn for a location of the steam power plant at which working medium is at a low temperature is heated in said passage means to a relatively high temperature without damage to said passage means due to thermal shock effects.

Claim 4

Injection cooler for steam power plants comprising a substantially hollow tubular member having a steam inlet and traversable by cooling steam supplied thereto through said steam inlet, at least one nozzle located in said tubular member in the vicinity of said steam inlet, and passage means disposed along the inner surface of said tubular member for supplying injection water to said nozzle, said passage means being of such construction as to form a protective tube in the injection cooler whereby injection water drawn for a location of the steam power plant at which working medium is at a low temperature is heated in said passage means to a relatively high temperature without damage to said passage means due to thermal shock effects, said passage means comprising a tube coil having the windings thereof welded to one another so as to form a steamtight, wave-shaped cylinder casing.

Claim 5

Injection cooler for steam power plants comprising a substantially hollow tubular member having a steam inlet and traversable by cooling steam supplied thereto through said steam inlet, at least one nozzle located in said tubular member in the vicinity of said steam inlet, and passage means disposed along the inner surface of said tubular member for supplying injection water to said nozzle, said passage means being of such construction as to form a protective tube in the injection cooler whereby injection water drawn for a location of the steam power plant at which working medium is at a low temperature is heated in said passage means to a relatively high temperature without damage to said passage means due to thermal shock effects, said passage means comprising a tube coil having the windings thereof welded to one another so as to form a steamtight, wave-shaped cylinder casing.

Claim 6

Injection cooler according to claim 3 wherein said tube coil is singly wound.

Claim 7

Injection cooler according to claim 3 wherein said tube coil is multiply wound.

Claim 8

Injection cooler according to claim 3 wherein said tube coil is of such dimensions that the injection water supplied therethrough to said nozzle is heated to a temperature at least approximating the boiling temperature thereof.

Claim 9

Injection cooler according to claim 3 in combination with a power plant comprising an economizer and an air heater having a heating surface therebetween, and high pressure regenerative preheater stages located upstream of said economizer, and wherein said injection water is supplied to said tube coil from a location upstream of said high pressure regenerative preheater stages of said steam power plant after passing through said heating surface located between said economizer and said air heater in said steam power plant.

Claim 10

Injection cooler according to claim 3 in combination with a power plant comprising an intermediate superheater, a heat exchanger heated by steam at the vicinity of said intermediate superheater, and high pressure regenerative preheater stages located upstream of said intermediate superheater, and wherein said injection water is supplied to said tube coil from a location upstream of said high pressure regenerative preheater stages of said steam power plant after passing through said heat exchanger heated by steam at the vicinity of said intermediate superheater of said steam power plant.

Claim 11

Injection cooler according to claim 8 wherein said heat exchanger is located in a starting vessel of the boiler in the steam power plant.

Claim 12

Injection cooler according to claim 8 wherein said heat exchanger is connected to a starting vessel of the boiler in the steam power plant.