SU992756A1 - Heat generation steam turbine plant operation method - Google Patents

Description

The invention relates to power engineering, more precisely, to heat generation, and can be used on existing and designed heat and power plants (CHP), operating on organic or nuclear fuel and equipped with power plants with heat turbines.

There is a method of combined generation of heat and electric energy, for example, a steam turbine installation, including the generation of live steam, the generation of electricity in a turbine generator, heating network water with steam from selections of the C turbine.

However, this method eliminates the operation of a steam turbine plant in a maneuverable (semi-peak) mode with unloading by electrical power during hours of failures of electrical loads: at night, weekends and holidays with preservation of heat output at a given level.

There is also known a method of operating a heat and steam generation turbine unit by heating network water in networked heaters with steam from heat generation samples and direct steam from a reduction and cooling unit 21.

The disadvantage of this method is low efficiency of power generation in modes of load regulation of the power system, insufficient maneuverability and reliability of the boiler during deep unloading of the turbine

The purpose of the invention is to increase the economy, maneuverability and reliability while reducing the electrical load.

This goal is achieved by the fact that, according to the method of operation of a heat-generating steam-turbine installation, by heating network water in networked heaters with steam from heat extraction turbine and direct steam from a reduction-cooling unit.

20 of the installation, heating of the supply water with live steam from the reduction cooling plant is carried out simultaneously with heating and steam from the heat extraction outlets.

25

The drawing shows a diagram of the implementation of the method.

Boiler 1 communicates with the cogeneration turbine 2, which has a condensing unit 3, basic heating,

Claims (2)

30 v 4 water supply unit, condensate pumps 5, regenerative heaters 6. The installation is equipped with an additional water supply heater 7 with a condensate pump 8, Reduction cooling plant (POC) 9 with a regulator 10 of the water supply temperature connected to the fresh steam pipe 11. The method is carried out in the following manner. During hours of electric load failures, on weekends and at night, electric power is reduced by reducing the steam flow rate to the turbine 2 coming from the boiler 1. At that, the flow rate of the selected steam turbine 2 and the heat load of the base preheater 4 of the network water accordingly decreases. In this connection, the temperature of the mains water after the baseline heater 4 also decreases. The regulator 10 of the mains water temperature maintaining the mains water temperature at a predetermined level increases the steam supply from the boiler 1 through POC 9 to the additional mains water heater 7. Condensate additional preheater 7 condensate pump. 8 is supplied to regenerative heaters 6. Thus, a high level of boiler loading and constant heat supply to consumers, irrespective of the magnitude of fluctuations of the electrical load, are maintained, which ensure the generation of electricity by the heating plant in the maneuverable pexKMSf. in the mode required by the power system. Increased efficiency is ensured by the fact that electric energy in a maneuverable mode is generated on the basis of heat consumption, while increased reliability is ensured by maintaining a high level of boiler loading, including with the complete cessation of electric power generation. The invention of the method of operation of a steam-turbine heat and power plant by heating the network WF in the network heaters with steam from the turbine cogeneration selections and live steam from the reduction and cooling plant The heating of network water by direct steam from a reduction and cooling unit is carried out simultaneously with heating and steam from the heat extraction selections. attention in the examination 1.Benensrn E.I., Ioffe LS C. Heating steam turbines, in M., Energie, 1976, pp. 88-96. 2.Tubnsky L.I., Frenkel L.D. High pressure steam turbines LMZ them. Stalin. Design and maintenance. M.-L., Gosenergoizdat, 1953, p. 213-216, 274-276.