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INVENTION
Patent of the Russian Federation RU2295642
METHOD OF WORK OF THERMAL ELECTRIC STATION
The name of the inventor: Sharapov Vladimir Ivanovich (RU); Kubashov Sergey Evgenievich
The name of the patent holder: State Educational Institution of Higher Professional Education "Ulyanovsk State Technical University"
Address for correspondence: 432027, Ulyanovsk, ul. Severnyj Venets, 32, GOU VPO "Ulyanovsk State Technical University", Vice-rector for scientific work
Date of commencement of the patent: 2005.11.03
The invention relates to the field of heat power engineering and can be used in thermal power plants. The technical result achieved by the present invention is to increase the economics of a thermal power plant by using the heat of the windings and the steel of a turbogenerator in a cycle of a thermal power plant. In order to achieve this result, in the method of operating a thermal power plant, through which steam is generated in the boiler, for which natural gas is supplied to the boiler and the air produced in the boiler is directed to a turbine whose shaft is connected to the turbine generator rotor, the coils and the generator steel are continuously cooled By circulating air through its internal space, the circulating air is cooled in air coolers, the natural gas supplied to the boiler furnace is used as cooling medium of the air coolers.
DESCRIPTION OF THE INVENTION
The invention relates to the field of heat power engineering and can be used in thermal power plants.
An analogue is known: a method of operating a thermal power plant, through which steam is generated in the boiler, for which fuel is supplied to the boiler and the air produced in the boiler is sent to the turbine, the shaft of which is connected to the rotor of the turbogenerator, and the coils and steel of the generator are continuously cooled By circulating air through its internal space, the circulating air, in turn, is cooled in water air coolers (see Poyarkov, MF, Electrical Equipment of Stations, Moscow: Energia, 1964. Fig.6-17 on p.271, 18 on p.272 and text explanations to them on p.270-273). This analogue is adopted as a prototype.
The disadvantage of analogues and a prototype is the reduced efficiency of thermal power stations due to heat losses of windings and the steel of a turbogenerator with cooling water.
The technical result achieved by the present invention is to increase the economics of a thermal power plant by using the heat of the windings and the steel of a turbogenerator in a cycle of a thermal power plant.
To achieve this result, a method is proposed for operating a thermal power plant through which steam is generated in a boiler, for which the natural gas and air are supplied to the boiler, the steam produced in the boiler is directed to a turbine whose shaft is connected to the turbine generator rotor, the coils and the generator steel are continuously cooled By circulating air through its internal space, the circulating air is cooled in air coolers.
The peculiarity is that as a cooling medium of air coolers natural gas is used, supplied to the furnace of the boiler.
The new method of operation allows the heat of the windings and steel of the turbogenerator to be used in the cycle of the thermal power plant, i.e. Allows increasing the efficiency of a thermal power plant by reducing heat losses to the environment.
Let's consider an example of realization of the declared way of work of thermal power station.
The drawing shows a diagram of a thermal power plant in which a new method is implemented.
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The station comprises a boiler 1 with a burner 2 connected by a steam pipe of an acute steam with a turbine 3 which is connected by a steam pipe of exhaust steam with a condenser 10, the main shaft 4 of the turbine 3 is connected to a rotor 5 of a turbogenerator 6, the turbogenerator has gas air coolers 7 with gas intake 8 and gas outflow 9 holes, The venting holes 9 of the air coolers 7 are connected by gas lines to the burner 2 of the boiler 1. In the boiler 1, natural gas and air are supplied through the burner 2. The steam produced in the boiler 1 is sent to the turbine 3 for the work to be done and condensed in the condenser 10. The main condensate of the turbine is returned to the boiler through the regeneration system 1. The rotation of the main shaft 4 of the turbine 3 is transferred to the rotor 5 of the turbogenerator 6. Cooling of the windings and steel of the generator 6 is carried out by a constant Circulation of air through its internal space, circulating air is cooled in gas air coolers 7. The gas necessary for the operation of the boiler is passed through the air coolers 7 and fed through the gas line to the furnace of the boiler. |
Thus, the new method allows to return the heat of the windings and the steel of the turbogenerator to the boiler, and also to exclude the system of water cooling of the circulating air of the generator from the scheme of the thermal power plant, i.e. Allows to increase the economy of a thermal power plant by reducing heat losses to the environment and simplifying the plant layout.
CLAIM
The method of operation of a thermal power plant through which steam is generated in a boiler, for which natural gas and air are supplied to the boiler, the steam produced in the boiler is directed to a turbine whose shaft is connected to the rotor of the turbogenerator, constant cooling of the windings and the generator's steel by circulating air through it The internal space, the circulation air is cooled in the air coolers, characterized in that the natural gas supplied to the boiler furnace is used as cooling medium of the air coolers.
print version
Date of publication 24.03.2007gg
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