RU2360133C1 - Thermal power plant operating method - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: operating method of thermal power plant, according to which heat carrier is generated in the boiler, includes the following: incoming water is processed in deaerator, flash steam generated during deaeration is cooled in flash steam condenser, and gas supplied to the boiler is used as cooling medium for flash steam cooling after gas pressure reduction device.

EFFECT: improving economy of thermal power plant owing to decreasing heat losses with deaerator flash steam, improving combustion process due to gas heating before boiler burners, and absence of additional power consumption required for supplying cooling medium to flash steam condenser.

Description

The invention relates to the field of power engineering and can be used in power plants.

A known analogue is the method of operation of a heat power plant, in which the heat carrier is generated in a boiler, the source water is treated in a deaerator, the vapor formed during deaeration is cooled in a vapor cooler (see the book Thermal and Nuclear Power Plants: Reference Book / Under the general editorship of A.V. Klimenko, V.M.Zorina - 3rd ed. Revised and revised - M .: MEI Publishing House. 2003, fig. 6.2 on p. 483-484 and textual explanations to it on p. 480, 485). This analogue is adopted as a prototype.

The disadvantage of the analogue and the prototype is the reduced efficiency of the power plant due to the loss of heat of evaporation and additional energy costs for the operation of devices for cooling the vapor.

The technical result achieved by the present invention is to increase the efficiency of the heat power plant by reducing the heat loss of the vapor, improving the combustion process and reducing the energy consumption for supplying the cooling medium to the vapor cooler.

To achieve this result, a method of operation of a heat and power plant is proposed, according to which the heat carrier is generated in a boiler, the source water is treated in a deaerator, the vapor formed during deaeration is cooled in a vapor cooler.

A feature of the proposed method of operation of a power plant is that the gas supplied to the boiler is used as a cooling medium for cooling the vapor after the device for lowering the gas pressure.

The new way of working allows to increase the efficiency of the heat and power plant by reducing heat loss to the environment, improving the combustion process by heating the gas in front of the boiler burners and reducing the energy costs of supplying the cooling medium to the vapor cooler.

Consider an example of the implementation of the claimed method of operation of a heat power plant. The drawing shows a diagram of a thermal power plant in which a new method is implemented.

The heat and power installation includes a boiler 1 with burners 2, a deaerator 3 with pipelines of vapor 4, feed water 5 and deaerated water 6. The deaerator 3 is connected by a pipe of vapor 4 with a cooler of vapor 7, which is included in the gas pipeline 8 between the device for reducing gas pressure 9 through a cooling medium and burners 2.

A coolant is generated in the boiler 1, for which purpose gas is supplied to the burners 2 of the boiler through the gas line 8 through the device for reducing the gas pressure 9. The coolant leaks are compensated with deaerated water, which is prepared in deaerator 3, for which source dewatering 3 is supplied with source water through the source water pipe 5. Deaerated water is discharged through the deaerated water pipeline 6. The deaerator 3 vapor is discharged through the vaporization pipe 4 to the vapor cooler 7. As the cooling medium in the vapor cooler 7 uses gas, which is fed to the vapor cooler 7 after installation to reduce the pressure of the gas 9 and in front of the burners 2.

Thus, a new method of operation of a power plant allows to increase its efficiency by reducing heat loss with deaerator vapor, improving the combustion process by heating the gas in front of the boiler burners and the absence of additional energy costs for supplying a cooling medium to the vapor cooler.

Claims (1)

The method of operation of the heat power plant, in which the coolant is generated in the boiler, the source water is treated in a deaerator, the vapor formed during deaeration is cooled in a vapor cooler, characterized in that the gas supplied to the boiler is used as a cooling medium for cooling the vapor after the pressure reducing device gas.