RU2268372C2 - Thermoelectric power station - Google Patents

Abstract

FIELD: heat-and-power engineering.

SUBSTANCE: thermoelectric power plant intends for warming of heating-system water. Thermoelectric power plant has heating-system water delivery line and return line, steam turbine provided with heating water withdrawal and capacitor. Capacitor is connected with circulation water delivery conduit and rundown pipe; circuit heaters are connected between heating-system water delivery and rundown conduits. The capacitors are connected with heating devices through heating medium. Station also has thermal pump assembly which has evaporator connected to rundown conduit of circulation water. Capacitor of thermal pump assembly is connected to heating-system water delivery line through medium to be warmed behind circuit heaters.

EFFECT: improved economy of thermoelectric power station.

1 dwg

Description

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

Thermal power stations are known - analogues containing supply and return pipelines of network water, a steam turbine with heating steam extraction and a condenser, to which pressure and drain pipelines of circulation water are connected, network heaters connected through a heated medium between the supply and return pipelines of network water and connected in the heating medium to the heating taps, a heat pump installation, the evaporator of which is connected in the heating medium to the drainage pipe of the circulation water (see AS SU 1 590569 A1, F 01 K 17/02, 09/07/1990). This analogue is adopted as a prototype of the invention.

The disadvantage of analogues and prototype is the reduced efficiency of the thermal power plant due to the limitation of the temperature of the network water after the network heaters, due to the amount of steam in the heating selections, and the ineffective use of heat from the condensate of the spent steam in the cycle of the station.

The technical result achieved by the present invention is to increase the efficiency of a thermal power plant by using the heat of the exhaust steam as a source of peak thermal power of the station.

To achieve this result, a thermal power plant is proposed that contains supply and return pipelines of network water, a steam turbine with heating steam extraction and a condenser, to which pressure and drain pipelines of circulating water are connected, network heaters connected via a heated medium between the supply and return pipelines of network water and connected through a heating medium to the heating taps, a heat pump installation, the evaporator of which is connected through a heating medium to a circulating drain pipe translational water.

The difference of the declared thermal power plant is that the condenser of the heat pump installation for the heated medium is included in the supply pipe of the network water after the network heaters.

A new distinctive feature that characterizes a thermal power plant allows to increase the efficiency of its work.

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

The drawing shows a schematic diagram of a thermal power station.

The thermal power station contains a heating turbine 1 with heating steam extraction 2 and a condenser 3, supplying 4 and return 5 pipelines of network water, a network pump 6, a heat pump installation 7, network heaters 8, which are connected via a heated medium between the supply 4 and return 5 pipelines water and connected through a heating medium to the heating taps 2. To the condenser 3 of the turbine 1 are connected pressure 9 and drain 10 pipelines of circulating water. An evaporator 11 of the heat pump installation 7 is connected to the drain pipe 10 of the circulation water through the heating medium, and a condenser 12 of the heat pump installation 7 is connected to the supply pipe 4 of the network water after the network heaters 8 via the heated medium.

Thermal power station operates as follows.

The network water coming from consumers through the return line of the network water 5 is supplied to the network heaters 8 by means of the network pump 6, where the steam from the heating taps 2 of the turbine 1 is heated. The steam spent in the turbine 1 is cooled in the condenser 3, for which it is supplied via the pressure head pipeline 9 and circulate water through the drain pipe 10. The network water heated in the network heaters 8 is additionally heated in the condenser 12 of the heat pump unit 7 before being supplied to consumers, and circulating water from the drain pipe 10 is used as a low-grade heat source in the evaporator 11 of the heat pump unit 7.

Thus, the heat of the exhaust steam is used as a source of peak thermal power of the station. Due to the successive inclusion of the condenser of the heat pump installation in the supply pipe of the network water after the network heaters and the use of low-grade heat obtained from the circulation water, the amount of heat supplied to consumers increases.

Claims (1)

A thermal power station containing the supply and return pipelines of the network water, a steam turbine with heating steam extraction and a condenser, to which the pressure and drain pipelines of the circulation water are connected, network heaters connected through the heated medium between the supply and return pipelines of the network water and connected via the heating medium to heating taps, a heat pump installation, the evaporator of which is connected via a heating medium to a drainage pipe of circulating water, characterized in that Sator heated by the heat pump system is included in the medium supply conduit network water after the network heaters.