Thermal power station

FIELD: heat power engineering; thermal power stations.

SUBSTANCE: invention is designed for generation of electric energy and heating of heating system water. Proposed thermal power station contains steam turbine with heating steam extractions and condenser to which pressure and drain circulating water pipelines are connected, lower and upper heating system heaters connected by heat medium end between feed and return heating system pipelines and connected by heating medium end to heating extractions, heat pumping unit with two-stage evaporator. First stage of evaporator is connected to circulating water drain pipeline, second stage of evaporator is connected to return heating system pipeline before lower heating system heater. Condenser of heat pumping unit is connected by heated medium end to feed heating system pipeline after upper heating system heater.

EFFECT: improved economy of thermal power station.

2 cl, 1 dwg

 

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

Known thermal power station-analogues containing steam turbine with steam extraction steam and a condenser, connected to the pressure and drain the piping circulating water, the lower and upper network heaters, enabled by the heated medium between the supply and return mains pipelines and connected via the heating medium to the heating selections, heat pump unit, mounted on the cold side to the reverse pipeline network and to the drain pipe of the circulating water, and on the hot side to the pipeline of the source of makeup water (see A.S. SU 1590569 A1, F 01 17/02, 07.09.1990). This analog adopted as a prototype of the invention.

The drawbacks and prototype is a limited field of application and reduced efficiency of thermal power stations. So, at low cost make-up water is impossible to provide the necessary removal of heat from the circulating water and the return water network. Increasing the temperature of the return water network leads to reduced heat generation.

The technical result achieved by the present invention is to increase the efficiency of thermal power is tanzihi due to the possible removal of heat from the circulating water and the return water network and the extension of the scope of the technical solution.

To achieve this result, the proposed thermal power plant containing a steam turbine with steam extraction steam and a condenser, connected to the pressure and drain the piping circulating water, the lower and upper network heaters, enabled by the heated medium between the supply and return mains pipelines and connected via the heating medium to the heating selections, heat pump unit, mounted on the cold side to the reverse pipeline network and to the drain pipe of the circulating water.

The first difference of the declared thermal power station is that the evaporator heat pump installation completed two stage, the first stage of the evaporator is connected to the drain pipe of the circulating water, the second stage of the evaporator is connected to a feedback network pipeline to the lower network heater, condenser heat pump installation in a heated environment is included in the feed pipeline network after the upper network of the heater. The second difference between the declared thermal power station is that the condenser of the heat pump units are two-stage and the first stage capacitor associated with the first stage of the evaporator, and the second stage capacitor associated with the second article the singing of the evaporator, included in the supply pipe network water after the top network heater consistently.

Novel features characterizing thermal power station, allow for the maximum removal of heat from the circulating water and the return water network and, thereby, improve the efficiency of the plant, as well as to provide extensive scope of the claimed technical solution.

Next, consider the information, confirming the possibility of carrying out the invention with getting the required technical result.

The drawing shows a schematic diagram of thermal power station.

Thermal power plant includes a steam turbine 1 with a heating selections pair 2 and the condenser 3, the feed 4 and reverse 5 power piping network pump 6, the bottom 7 and top 8 network heaters included in the heated environment between the server 4 and reverse 5 network pipelines and connected via the heating medium to the heating selections 2, heat pump unit 9 with a two-stage evaporator and the condenser. To the turbine condenser 3 is connected pressure 10 and drain 11 piping circulating water. The first stage of the evaporator 12 is connected to the drain pipe of the circulating water 11, and the second stage of the evaporator 13 is connected to the network trubor the water in front of the lower network of the heater 7. The first stage of the condenser 14 heat pump installation, connected to the first stage of the evaporator 12, and the second stage capacitor 15 connected with the second stage of the evaporator 13, is included in the supply pipe network water 4 after the upper network of the heater 8 in sequence.

Thermal power plant works as follows. Spent in the steam turbine 1 steam is condensed in the condenser 3, which in the condenser pressure on the circulation pipe 10 serves for cooling water. Heated in the condenser, the water enters the first stage of the evaporator 12 heat pump installation 9, where it transfers its heat to the refrigerant circulating in the loop heat pump installation, and then removed through the drain pipe circulating water 11. Return from consumers on the reverse pipeline network 5 network water network served by the pump 6 to the second stage evaporator 13 heat pump installation 9, which gives off some heat to the refrigerant heat pump installation and cooled, then network water flows consistently in the bottom 7 and top 8 network heaters, where it is heated by steam heating selections 2 turbine 1. Before serving consumers network water successively heated in the first 14 and second 15-speed condenser heat pump installation 9 due to the heat of cladag the NTA, circulating in the heat pump circuit 9. Through the use of two-stage evaporator heat pump installation 9 maximum possible removal of heat from the circulating water and the return water network, which increases heat generation, allows to increase the efficiency of thermal power plants and to expand the scope of the claimed technical solution.

1. Thermal power plant containing a steam turbine with steam extraction steam and a condenser, connected to the pressure and drain the piping circulating water, the lower and upper network heaters, enabled by the heated medium between the supply and return mains pipelines and connected via the heating medium to the heating selections, heat pump unit, mounted on the cold side to the reverse pipeline network and to the drain pipe of the circulating water, characterized in that the evaporator heat pump installation completed two stage, the first stage of the evaporator is connected to the drain pipe of the circulating water, the second stage of the evaporator is connected to a feedback network pipeline in front of the lower heater network the condenser heat pump installation in a heated environment included under the store network the pipeline after the upper network of the heater.

2. Thermal power plant according to claim 1, characterized in that the condenser heat pump units are two-stage and the first stage capacitor associated with the first stage of the evaporator, and the second stage capacitor associated with the second stage evaporator included in the supply pipe network water after the top network heater consistently.



 

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