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 source water included source water heater that is connected to the piping of a heating medium. The station is equipped with a regulator dissolved oxygen in feed water heating system, which is connected to the sensor dissolved oxygen in the deaerated makeup water and with the regulatory authorities on the piping hot water and pipeline heating medium heater source 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 elec is sustained fashion to withdrawal, 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 that is connected to the piping of a 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 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 oxygen in the deaerated water below the required value. Because regulatory quality deaeration of water, characterized primarily by dissolved oxygen in the deaerated water, can be achieved at much lower values of temperature and flow rate of a heating agent, deaeration almost always occurs with excessive temperature and flow rate of a heating agent. On the other hand, in some modes the flow of a heating agent may be insufficient to ensure regulatory quality deaeration, particularly for vacuum deaeration of water. So, another week is tion.

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 water and the flow rate of a heating agent is 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 that is connected to the piping of a heating medium.

The peculiarity lies in the fact that the station is supplied with a regulator dissolved oxygen in feed water heating system, which is connected to the sensor dissolved oxygen in the deaerated makeup water and with the regulatory authorities on the piping hot water and pipeline heating medium heater source water.

So, as a regulator Of< The R-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 high efficiency 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 drawing shows a schematic diagram of thermal power with whom boram 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 that is connected to the piping of a heating medium, a pair of lower heating selection 8. The station is equipped with a controller contents

dissolved oxygen 9 in the make-up water heating system, which is connected to the sensor dissolved oxygen 10 in deaerated make-up water and with regulatory bodies 11 on the pipeline of the heating medium heater source water and 12 on the piping 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 the bottom of the heating process heater 7, and the overheated water steam extraction the higher potential. Maintain the desired concentration of dissolved oxygen in deari is ashada hot water. When the concentration of dissolved oxygen relative 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 flow rate of the hot water and, conversely, by lowering the concentration of oxygen relative to a given value of the first reduce the consumption of the hot water, and then reduce 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 flow rate of the hot water. This regulation provides preferential loading high-efficiency lower heating turbine selection.

Thus, the proposed solution allows to increase the reliability and efficiency of thermal power stations by providing a set concentration of dissolved oxygen in the deaerated makeup water at an economical loading selections turbine.

Claims

her environment for 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 that is connected to the piping of a heating medium, characterized in that the station is supplied with a regulator dissolved oxygen in feed water heating system, which is connected to the sensor dissolved oxygen in the deaerated makeup water and with the regulatory authorities on the piping hot water and pipeline heating medium heater source 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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