RU2275512C2 - Method of operation of thermal power station - Google Patents

Abstract

FIELD: heat power engineering.

SUBSTANCE: invention is designed for generation of electric energy. According to provided method all return flow of heating system water returned by consumers is heated successively by steam of turbine steam extractions in lower heating system heater, condenser of heat pumping unit and upper heating system heater by heat removed from return heating system water in evaporator of heat pumping unit and then heated water is delivered to consumers.

EFFECT: increased economy of thermal power station.

1 dwg

Description

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

Analogs are known - the methods of operation of thermal power plants, in which the entire flow of return network water returned from consumers is successively heated in the condenser of the heat pump installation with heat removed from the return network water in the evaporator of the heat pump installation, in the lower and upper network heaters by steam of turbine withdrawals, and then sent to consumers (see.with. SU 1239374 A1 F 01 K 17/02, 06/23/1986). This analogue is adopted as a prototype.

The disadvantage of analogues and prototype is the reduced efficiency of the thermal power plant due to insufficient generation of electricity for heat consumption, due to the displacement in the lower network heater of the heat received from the low-potential lower heating selection, the heat received in the heat pump installation using high-potential energy sources (for drive compressor installation).

The technical result achieved by the present invention is to increase the efficiency of the thermal power plant by reducing the temperature of the return network water and increasing the generation of electricity for thermal consumption.

To achieve the technical result, a method for operating a thermal power plant is proposed, in which the entire return network water return from consumers is heated in the lower and upper network heaters with steam of turbine withdrawals, as well as in the condenser of the heat pump installation with heat removed from the return network water in the evaporator heat pump installation, after which it is sent to consumers.

The difference of the proposed method of operation of the thermal power plant is that the heating of the entire flow of network water in the condenser of the heat pump installation is carried out after heating the network water in the lower network heater.

A new distinctive feature that characterizes the way a thermal power plant works allows to increase the efficiency of its operation by increasing the generation of electricity from the heat consumption by steam of the lower heating system.

Next, we consider the information confirming the possibility of carrying out the invention with obtaining the above technical result.

The drawing shows a schematic diagram of a thermal power plant, explaining the proposed method.

The thermal power plant contains return 1 and supply 2 network pipelines, between which lower 3 and upper 4 network heaters of the heating turbine 5 are connected. The evaporator 6 of the heat pump installation, the condenser 7 of which is included in the return network, is included in the return pipe of the network water 1 in front of the lower network heater 3 pipeline 1 between the lower 3 and upper 4 network heaters.

Thermal power station operates as follows.

The entire flow of return network water returned from consumers through the return line of network water 1 is cooled in the evaporator 6 of the heat pump installation, and then it is successively heated in the lower network heater 3, the condenser of the heat pump installation 7 and in the upper network heater 4, and then sent to consumers through the supply the network water pipe 2. In the lower and upper network heaters 3 and 4, the network water is heated with steam from the heat-recovery turbine 5. In the heat pump installation, the network water is heated they are found in the condenser 7 with heat taken by the evaporator 6 from the return network water from the pipeline 1.

Thus, the proposed thermal power plant allows to increase the efficiency of its operation due to the efficient use of the heat of the return network water for heating the network water in the supply pipe, a larger load of the low-potential lower heating selection of the turbine and an increase in the generation of electricity for heat consumption.

Claims (1)

The method of operation of a thermal power plant, in which the entire return network water stream returned from consumers is heated by steam of turbine withdrawals in the lower and upper network heaters, as well as in the condenser of the heat pump installation with heat removed from the return network water in the evaporator of the heat pump installation, after which direct to consumers, characterized in that the entire flow of network water is sequentially heated in the lower network heater, the condenser of the heat pump installation and the upper network heater e.