Thermal power plant

 

The invention relates to the field of power engineering and can be used in thermal power plants. Thermal power plant 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 the pipeline is the source of water connected to the heater source water pipeline heating medium, and in the piping of the hot water connected to the hot water heater with pipe heating environment. 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 pipeline of the heating medium heater source 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 on heat with a selection pair, 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 pipeline of the source water the source water heater and piping of the hot water heater hot water, to which is connected a piping heating medium (see and.with. SU 1328563, F 01 17/02, 07.08.1987). This analog adopted as a prototype.

The disadvantage of analogs and prototypes is reduced efficiency of the method of operation of thermal power plants due to higher energy costs heating hot and the source water before 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 electric stations2can be achieved at lower temperatures of the source and the hot water, but despite this, the temperature of the source and the hot water before deaerator remain unchanged, resulting in waste of energy. Another disadvantage of this method is the low quality of deaeration of water, leading to lower reliability of thermal power plants.

The technical result achieved by the present invention is to improve the reliability and efficiency of thermal power plants by maintaining the optimum temperature of the source and 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 pipeline of the source water the source water heater and piping of the hot water heater hot water to which connection is tochnoi water heating systems which is connected to the pH sensor deaerated make-up water and with the regulatory authorities on the pipeline of the heating medium heater source water and pipeline heating medium heater hot water.

So, as a pH regulator to make-up water heating system 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 the economic is kanonichnost work cogeneration turbine and the station in General.

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

The station contains cogeneration turbine 1 with the selections of a pair connected by the heating medium to the heating 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 source water pipeline 3 source water heater 7 with pipe heating medium 8 and the piping hot water 4 heater 9 that is connected to the piping of a heating medium (steam over high capacity) 10. The station is equipped with a pH regulator 11 make-up water heating system, which is connected to the pH sensor 12 deaerated make-up water and with regulatory bodies 13 on the pipeline of the heating medium heater source water and 14 on the pipeline of the heating medium heater of the hot water. Thermal power plant works as follows. Mains water is heated in the network heaters steam heating cogeneration turbine 1, charging woerter serves the source and heated water. The source water is heated by steam the bottom of the heating process heater 7, and heated water - vapor sampling a higher capacity heater 9. The maintenance of the desired pH and the corresponding concentration of carbon dioxide in deaerated make-up water is carried out by sequential regulation of the temperature of the source water and the temperature of the hot water. With decreasing pH (increasing the concentration of carbon dioxide) with respect to a given value of the first raise the temperature of the source water within the heat output of heater water source or to a temperature of t=40-50C, and then if necessary, increase the temperature of the hot water 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 the temperature of the source water. 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 changes the temperature of the source water and the temperature of the hot water. Such an order regulating the manner 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 an economical loading selections turbine.

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 the hot water is connected by a pipeline deaerated make-up water from the reverse pipeline network, is included in the pipeline of the source water the source water heater and piping of the hot water heater hot water, to which is connected a piping heating medium, characterized in that the station is supplied with a regulator pH of feed water heating systems which is connected to the pH sensor deaerated make-up water and with the regulatory authorities on the pipeline of the heating medium heater source 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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