Process and apparatus for superheating partly expanded steam
AssigneeSulzer Brothers Limited
InventorMax Weber
Life of this patent
Estimating the term…
Abstract
The steam which is produced by the steam generator in the secondary coolant circuit of the nuclear reactor power plant is partly expanded in a turbine and delivered to a reheater. A part of the superheated steam is tapped off from an upstream portion of the steam turbine and then cooled to a saturated steam condition. This saturated steam is then passed into the reheater to reheat the flow of partly expanded steam via a heat exchange.
Claims11
A process of re-heating steam comprising the steps of
- partly expanding a flow of superheated steam in a steam turbine;
- delivering the partly-expanded flow of steam to be reheated to a reheater;
- extracting a part of the superheated steam from an upstream portion of the steam turbine in a superheated condition;
- cooling the extracted part of the superheated steam from the superheated condition to a saturated steam condition;
- and
- then placing the saturated steam in heat exchange relation with the partly-expanded flow of steam in the re-heater for re-heating of the partly-expanded flow of steam.
A process for the re-heating of steam which comprises the steps of
- generating a flow of superheated steam in a steam generator;
- partly expanding the flow of superheated steam in a steam turbine downstream of the steam generator;
- delivering the flow of partly expanded steam to one side of a reheater;
- tapping off a part-flow of the superheated steam from the flow path between the steam generator and reheater;
- cooling the tapped part-flow of superheated steam to a saturated steam condition;
- and
- then passing the saturated steam into another side of the re-heater for re-heating the flow of partly expanded steam in the re-heater in a heat exchange relation.
A nuclear power plant comprising
- a steam generator for generating a flow of superheated steam;
- a steam turbine for receiving and partly expanding the flow of superheated steam, said turbine having a tap for extracting steam from an upstream end thereof;
- a re-heater connected on one side to said tap to receive a flow of extracted steam therefrom and on another side with said turbine to receive the flow of partly expanded steam therefrom in heat exchange relation with the extracted steam;
- and
- a cooler between said tap and said re-heater for cooling the extracted steam to a saturated steam condition prior to entry into heat exchange relation with the partly expanded steam.
In a power plant having a steam generator for generating a flow of superheated steam and a steam turbine for receiving and expanding the flow of superheated steam, the combination of
- a re-heater connected to said turbine to receive a flow of partly expanded steam therefrom, and
- means for tapping off a part flow of the super-heated steam from between said steam generator and said reheater to flow in heat exchange relation with the flow of partly expanded steam in said reheater, said means including a cooler therein for lowering the temperature of the tapped-off super-heated steam to a saturated steam condition prior to entry into heat exchange relation with the flow of expanded steam.
A nuclear power plant comprising
- a nuclear reactor;
- a reactor coolant circuit for circulating a primary coolant through said reactor;
- a secondary coolant circuit for circulating water in heat exchange relation with the primary coolant of said reactor coolant circuit, said secondary coolant circuit including a steam generator receiving the primary coolant and water in heat exchange relation to produce a superheated steam, a steam turbine for receiving and expanding the superheated steam, and a re-heater connected to said turbine for receiving a flow of partly expanded steam;
- and
- means for tapping off a part-flow of the superheated steam from between said steam generator and said reheater to flow in heat exchange relation with the flow of partly expanded steam in said re-heater, said means including a cooler therein for lowering the temperature of the tapped-off superheated steam to a saturated steam condition prior to entry into heat exchange relation with the flow of partly expanded steam.
Dependencies are inferred from the claim text.