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. The station contains a vacuum deaerator with pipelines source, hot water, and the pipeline deaerated make-up water, which is connected to 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 also 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 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 power station, containing teplosetevyh 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, CL 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 on heating water source and supply of heating agent to 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 is changing the quality of the source water, and with it the lack of CO2can be achieved at lower temperatures source oueration remain unchanged, which leads to waste of energy. On the other hand, in some modes, the temperature of the source water and the flow rate of the heating agent may be insufficient to 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 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 pipeline GRE and, 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 source 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 different algorithms introduced into the regulator when setting it up, when you have 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 heat electrication 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 station containing 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 that is connected to the piping of a heating medium, a pair of lower heating selection 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 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 altereglow 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. 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 flow rate 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 flow rate 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 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 preimushestvenno can 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 that is connected to the piping of a 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 source water.

 

Same patents:

Thermal power plant // 2220293
The invention relates to the field of power engineering and can be used in thermal power plants

Thermal power plant // 2220292
The invention relates to the field of power engineering and can be used in thermal power plants

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

Thermal power plant // 2220290
The invention relates to the field of power engineering and can be used in thermal power plants

Thermal power plant // 2220289
The invention relates to the field of power engineering and can be used in thermal power plants

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

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

Thermal power plant // 2220286
The invention relates to the field of power engineering and can be used in thermal power plants

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

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

Thermal power plant // 2220293
The invention relates to the field of power engineering and can be used in thermal power plants

Thermal power plant // 2220292
The invention relates to the field of power engineering and can be used in thermal power plants

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

Thermal power plant // 2220290
The invention relates to the field of power engineering and can be used in thermal power plants

Thermal power plant // 2220289
The invention relates to the field of power engineering and can be used in thermal power plants

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

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

Thermal power plant // 2220286
The invention relates to the field of power engineering and can be used in thermal power plants

The invention relates to the combined production of electrical energy, warmth in the form of steam or hot water, cold, carbon dioxide and other products

The invention relates to the field of energy

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

Up!