RU2269015C2 - Thermal power station - Google Patents

Abstract

FIELD: heat power engineering.

SUBSTANCE: invention can be used for heating system water. Proposed thermal power station contains return and feed system water pipelines between which lower and upper system heaters of extraction turbine are connected, turbine condenser is connected with pipelines of cooling and heated circulation water, heat pump plant with condenser and evaporator, the latter being connected to pipeline of heated circulation water. Thermal power station includes heat pump plant whose condenser is connected to system water pipeline after lower system heater.

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.

Known analogues are thermal power plants containing return and supply pipelines of network water, between which lower and upper network heaters of a heating turbine are included, a turbine condenser with pipelines of cooled and heated circulating water, an evaporator of a heat pump installation included in a pipeline of heated circulation water, and a heat pump condenser installations included in the heating water make-up pipeline (see SU 1590569 A1, F 01 K 17/02, 09/07/1990, in document 3 pp.). This analogue is adopted as a prototype.

The disadvantage of analogues and prototype is the limited scope of solutions, for example, they cannot be applied at low costs of make-up water of the heating system.

The technical result achieved by the present invention is to expand the scope of the power plant.

To achieve the technical result, a thermal power plant is proposed that contains return and supply pipelines of network water, between which network heaters of a heating turbine, a turbine condenser with chilled and heated circulating water pipelines, a heat pump installation with a condenser and an evaporator are included, the last of which is included in a heated pipeline circulating water.

The condenser of the heat pump installation (HPU) is included in the network water pipe after the lower network heater.

The inclusion in the aggregate of essential features characterizing a thermal power plant, new elements can improve the efficiency of the thermal power plant due to a more efficient use of the heat of cooling water after the turbine condenser.

Information confirming the possibility of carrying out the invention with obtaining the above technical result are as follows.

The thermal power station (see drawing) contains a return network pipe 1 and a supply network pipe 2, between which the lower network heater 3 and the upper network heater 4 of the heating turbine 5 are included. The condenser 6 of the heat pump unit, the evaporator is included in the network water pipe after the lower network heater 3 7 which is included in the pipeline of heated circulating water 8.

Thermal power station operates as follows.

The entire flow of return network water returned from consumers through the return pipeline of network water 1 is sequentially heated in the lower network heater 3, the condenser 6 of the HPU and in the upper network heater 4, and then sent to consumers through the supply pipeline of network water 2.

In the lower and upper network heaters 3 and 4, the network water is heated by the steam of the sampling of the heating turbine 5.

In the condenser ТНУ heating of the network water is carried out with heat taken by the evaporator ТНУ from the heated circulating water from the pipeline 8.

Thus, the proposed thermal power plant allows to increase the efficiency of its operation due to the efficient use of the heat of the heated circulating water and the simplification of the circuit of the thermal power plant due to the exclusion of special equipment of a typical circuit for heat recovery of circulating water - cooling towers.

Claims (1)

A thermal power station containing a return and supply piping for network water, between which lower and upper network heaters of a heating turbine, a turbine condenser with pipelines of cooled and heated circulating water, a heat pump installation with a condenser and an evaporator, the last of which is included in the heated circulating water pipeline, are included, characterized in that the condenser of the heat pump installation is included in the network water pipe after the lower network heater.