Thermal power plant

 

The invention relates to the field of power engineering and can be used in thermal power plants. The station contains cogeneration turbine extraction steam, connected via the heating medium to the heating selections, and turned on the heated environment in the network pipeline network heaters, vacuum deaerator with pipelines source and hot water, and the pipeline deaerated make-up water, coupled with the reverse pipeline network. In piping hot water included heater that is connected to the piping of a heating medium. The station is equipped with a regulator pH of feed water heating system, which is connected to the pH sensor deaerated make-up water and with the regulatory authorities on the piping hot water and pipeline heating medium heater of the hot water. The invention improves the reliability and efficiency of thermal power station. 1 Il.

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

Known counterparts - thermal power station, containing extraction turbine extraction steam, connected by heating the vacuum deaerator with pipelines source and hot water, connected by pipeline deaerated make-up water from the reverse pipeline network, is included in the pipeline of the heating medium heater heating agent (see and.with. 1328563, 1987, BI No. 29). This analog adopted as a prototype.

The disadvantage of analogs and prototypes is reduced efficiency and reliability of thermal power plants due to higher energy costs in filing and the heat of the heating agent in the deaerator at a residual concentration of carbon dioxide in deaerated water below the required value. Usually thermal and hydraulic regimes preparation of makeup water constant support, based on the achievement of the required standards of the absence of carbon dioxide CO2in deaerated water in the estimated steady state, which corresponds to the pH of deaerated water 8,33. During operation of thermal power plants in several variables, modes of preparation of make-up water changes, water quality, together with the absence of CO2can be achieved at lower temperatures and costs of a heating agent, but despite this, the temperature and flow rate of a heating agent before deaerator remain unchanged, which results in excessive energy which I ensure regulatory quality deaeration, particularly for vacuum deaeration of water. Thus, another disadvantage of this method is the low quality of deaeration of water, resulting in lower reliability of the station.

The technical result achieved by the present invention is to improve the reliability and efficiency of thermal power plants by maintaining the optimal temperature and flow rate of the hot water supplied to the deaerator.

To achieve this result, the proposed thermal power plant, containing extraction turbine extraction steam, connected via the heating medium to the heating selections, and turned on the heated environment in the network pipeline network heaters, vacuum deaerator with pipelines source and the hot water is connected by a pipeline deaerated make-up water from the reverse pipeline network, is included in the piping of the hot water heater with pipe heating environment.

The peculiarity lies in the fact that the station is supplied with a regulator pH of feed water heating system, which is connected to the pH sensor deaerated make-up water and with the regulatory authorities on the piping hot water and Truboplast” is used commercially available microprocessor controller remikont P-130 - programmable device. It can be used for automation of processes carried out by a variety of algorithms that are entered into the controller when it is configured, when it is necessary to solve difficult task control with bumpless switching on and off individual circuits, automatic switch control structure, automatically changing the settings and use such operations associated with the adaptation of control system to the changing dynamics of the technological process (see the catalogue of the State system of industrial instruments and automation equipment. Issue 6, 7, 8, 9. Centralized control and regulation. Regulatory microprocessor controllers Ramicone R-110, R-112, R-120, R-122. M: Informpribor, 1987, S. 1-4).

New interconnection element can increase the reliability and efficiency of thermal power stations by providing the required quality deaeration at an economical working of thermal power station.

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 a thermal system is determined as being the selections and turned on the heated environment in the network pipeline network heaters, vacuum deaerator 2 pipelines source 3 and the hot water 4 is connected by a pipeline deaerated makeup water 5 from the reverse pipeline network 6, is included in the piping hot water 4 heater 7 with pipe heating medium 8. The station is equipped with a regulator pH 9 make-up water heating system, which is connected to the pH sensor 10 deaerated make-up water and with regulatory bodies 11 on the pipe of the hot water and 12 on the pipeline of the heating medium heater hot water.

Thermal power plant works as follows. Mains water is heated in the network heaters steam heating cogeneration turbine 1, feed water heating before serving in the reverse pipeline network 6 dearyou in vacuum deaerator 2, which in the deaerator served source water and heated water. The source water is heated by steam lower heating selection, and overheated water steam of selecting higher capacity heater 7. The maintenance of the desired pH and the corresponding concentration of carbon dioxide in deaerated make-up water is carried out by sequential temperature control and flow pereg the La increase the flow of hot water and then, if necessary, increase its temperature and, on the contrary, with the increase of pH (lowering the concentration of carbon dioxide) with respect to a given value of the first lower the temperature of the hot water, and then reduce its consumption. Operations are blocking signals from the controller regulators are implemented by the Remikont on the basis of the input in the sequence of operation of the regulatory authorities and are valid for a particular plant spacing changing the flow rate of the hot water and its temperature.

Thus, the proposed solution allows to increase the reliability and efficiency of thermal power stations by providing a given concentration of carbon dioxide in deaerated make-up water at the optimal mode of operation of the turbine plant with a maximum production of electricity at thermal consumption.

Claims

Thermal power station, containing extraction turbine extraction steam, connected via the heating medium to the heating selections, and turned on the heated environment in the network pipeline network heaters, vacuum deaerator with pipelines source and hot water, debaprasad hot water heater with pipe heating medium, characterized in that the station is supplied with a regulator pH of feed water heating system, which is connected to the pH sensor deaerated make-up water and with the regulatory authorities on the piping hot water and pipeline heating medium heater of the hot water.

 

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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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