Thermal power plant

 

The invention relates to the field of power engineering and can be used in thermal power plants. Thermal power station contains at least one steam boiler and steam turbine, pipeline network with the inclusion of lower and upper network heaters, connected to the extraction turbines. The station also contains the peak source of heat, vacuum deaerator feed water piping heating agent and make-up water which is connected to the network pipeline. As the peak radiant heat installed a heat exchanger included in the heating medium in the flue gas leaving the steam boiler and the piping of a heating agent of the vacuum deaerator connected to the network pipeline after the specified heat exchanger. The invention improves the efficiency and reliability of thermal power plants. 1 Il.

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

Known thermal power station-analogues containing at least one steam boiler and steam turbine, pipeline network with the inclusion of a lower and upper set is I and thermal network. - M.: Energoizdat, 1982. Fig. 3.1. (b)). This analog adopted as a prototype.

The disadvantage of the prototype and its analogues are reduced efficiency due to the need of the cost of fuel for the operation of peak-load boiler and reduced reliability due to inefficient water deaeration due to the failure to ensure the stability of the temperature regime vacuum deaeration. In the warm season temperature direct network of water insufficient for use of this water as a heating agent of the vacuum deaerator.

The technical result achieved by the present invention is to increase efficiency and reliability.

This technical result is achieved by the fact that thermal power station contains at least one steam boiler and steam turbine, pipeline network with the inclusion of lower and upper network heaters connected to the selection of turbines, and the peak source of warmth.

The peculiarity lies in the fact that, as the peak radiant heat installed a heat exchanger included in the heating medium in the flue gas leaving the steam boiler and the piping of a heating agent of the vacuum deaerator connected to the network pipeline panago by the heating medium in the flue gas leaving the steam boiler, and the connection pipe of a heating agent of the vacuum deaerator to the network piping downstream of the heat exchanger allows to increase the efficiency and reliability of thermal power plants due to the exclusion from the scheme of the peak load boiler and quality assurance deaeration of makeup water heating systems at all cost make-up water.

Conducted by the applicant's analysis of the prior art, including searching by the patent and scientific and technical sources, and identify sources that contain information about the equivalents of the claimed invention, has allowed to establish that the applicant had not discovered similar, characterized by signs, identical with all the essential features of the claimed invention. The definition from the list of identified unique prototype as the most similar essential features of the analog revealed the essential in relation to the technical result of the distinctive features in the claimed device, set forth in the claims.

Therefore, the claimed invention meets the condition of "novelty."

Next, consider the information, confirming the possibility of carrying out the invention with getting the required least one steam boiler 1 and a single steam turbine 2, the network pipe 3 with the inclusion of the bottom 4 and top 5 network heaters, connected to the extraction turbines. As the peak radiant heat installed the heat exchanger 6, is enabled by the heating medium in the flue gas leaving the steam boiler. The network pipeline 3 to the lower network of the heater 4 is connected a charging pipe 7 vacuum deaerator feed water 8, the piping of a heating agent 9 which is connected to the network piping downstream of the heat exchanger 6, is included in the flue gas leaving the steam boiler.

The work station is as follows. Network water is heated in the bottom 4 and top 5 online heaters. If necessary, cover the peak thermal loads additional heating network water is the last in the heat exchanger 6.

Source water Omakaitse at the site of treatment were 10 and is fed into the vacuum deaerator 8 then goes to the network line 3 before lower network heater 4. The selection of a heating agent of the vacuum deaerator 8 produce from a network of piping downstream of the heat exchanger 6.

Thus, the presented data suggest about>ormula inventions

Thermal power plant containing at least one steam boiler and steam turbine, pipeline network with the inclusion of lower and upper network heaters connected to the selection of turbines, and the peak source of heat, vacuum deaerator feed water piping heating agent and make-up water which is connected to the network pipeline, characterized in that as the peak radiant heat installed a heat exchanger included in the heating medium in the flue gas leaving the steam boiler and the piping of a heating agent of the vacuum deaerator connected to the network pipeline after the specified heat exchanger.

 

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FIELD: thermal engineering; thermal power stations.

SUBSTANCE: proposed operating process of thermal power station is as follows. Boiler-generated steam is conveyed to turbine wherefrom it is supplied to condenser for condensing it; full-flow condensate is delivered by means of condensate pump to low-pressure regenerative heaters and then to high-pressure deaerator; makeup water is deaerated in atmospheric-pressure deaerator and conveyed to full-flow condensate path, vented steam being discharged from atmospheric-pressure deaerator into atmosphere. Flowrate of vented steam discharged from atmospheric-pressure deaerator is regulated with respect to desired content of oxygen dissolved in mixed flow of makeup water and full-flow condensate beyond vacuum system of turbine unit, for instance downstream of low-pressure heater second along full-flow-condensate path.

EFFECT: enhanced economic efficiency and operating reliability of thermal power station.

1 cl, 1 dwg

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