RU2391515C1 - Electro-generating installation with carbon-hydrogen fuel - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: electro-generating installation with carbon-hydrogen fuel consists of steam boiler with carbon-hydrogen fuel, high temperature steam turbine of average pressure, condensation steam turbine, electro-generators, high temperature hydrogen super-heaters, water steam condenser, steam generator, working agent consumption regulators, regenerating heater of feed water, condensate pumps, and feeding pumps. Notably, by means of a pipeline a heating steam output of the installation is connected with an intermediary input of the condensate steam turbine, the input of which is connected to outputs of the steam generator for secondary steam and steam from the steam boiler. Also high temperature steam turbines have their own feeding pump, while the condensate steam turbine has its own feed pump; to outputs of both there comes condensate from the condenser of water steam and from the regenerating heater of feed water; the latter is installed at the input to the steam boiler. Steam for feed water heating comes through the steam pipe from the output of the condensate steam turbine.

EFFECT: increased energy and economic efficiency.

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Description

The invention relates to the field of power engineering and is intended for the electric power industry.

A device is known (RF Patent for the invention No. 2311540 dated January 31, 2006. High-temperature steam turbine Shifrin B.A., Milman O.O., Fedorov V.A., Tokar R.A.) containing a steam boiler, a hydrogen combustion chamber with oxygen, a steam condenser, a steam turbine installation of several series-connected turbines, the rotors of which rotate at different speeds.

Its disadvantages include the fact that it lacks a thermal energy recovery system and intermediate steam overheating.

A device is known (see A Vision for Thermal Power-Plant Technology Development in Japan. Energy and Technology; Sustaining World Development Into the next Millenium // Hisa Sh. At all // 17 Congress of the World Energy Counsil, Houston, Texas, September 13-18, 1998. Vol.2. P.25-38), including a steam generator, hydrogen high-temperature superheaters, a steam turbine unit containing four turbines, an exhaust steam condenser, pumps.

Its disadvantage is that only hydrogen fuel is used in the cycle, and the output of the secondary steam from the steam generator is directed to the inlet of the first turbine with the maximum pressure in the cycle. The latter circumstance significantly reduces the volumetric flow rate of steam at the inlet of the high-pressure turbine and will reduce its efficiency due to the partial supply of steam and the low height of the blades.

The closest in technical essence is the device (Patent of the Russian Federation for utility model No. 64699 dated 03/19/2007 Electric generating device with a high-temperature steam turbine. Favorsky ON, Leontyev AI, Fedorov VA, Milman OO) containing a steam boiler, a high temperature hydrogen superheater, a steam turbine with an electric generator and a condenser, etc.

The disadvantage of this device is that at the exit of the turbine at a high temperature of steam at the inlet of it, there may be superheated exhaust steam, which inevitably leads to a decrease in its efficiency.

The purpose of the invention is the creation of a highly efficient power generating complex with several steam turbines having systems for intermediate steam overheating and heat energy recovery using hydrocarbon and hydrogen fuels.

The technical essence of an electric generating device comprising a steam boiler with hydrocarbon fuel, a high temperature high pressure steam turbine with an electric generator, a high temperature medium pressure steam turbine with an electric generator, a condensing steam turbine with an electric generator, a high temperature hydrogen superheater and a high temperature high temperature steam high temperature steam turbine medium turbine pressure, steam condenser, steam generator, flow rate controllers, regenerative feed water heater, condensate pumps, feed pumps, consists in the fact that the steam generator output via a heating steam is connected by a pipeline with an intermediate input to a condensing steam turbine, the input of which is connected to the exits from a steam generator for a secondary steam and steam from a steam boiler, moreover, high-temperature steam turbines have their own feed pump, and the condensing steam turbine has its own feeder The pump is, the input of which receives the condensate from the condenser by the steam condensate pump and a regenerative feedwater heater installed at the inlet of the steam boiler, the steam to heat the feed water supplied through the steam line from the selection of the condensing steam turbine.

The use of a device for the continuous production of electricity involves the simultaneous use of hydrocarbon and hydrogen fuels. This allows you to use cheaper hydrocarbon fuel for heating feed water and producing water vapor, and hydrogen fuel (hydrogen and oxygen) only for overheating steam, for example, more than 600 ° C.

This will improve not only the financial efficiency of using the device, but also energy, as To obtain hydrogen and use it in power plants, additional costs of hydrocarbon fuel are required either for conversion, or for storage and transportation.

Using a steam generator at the outlet of a high-temperature medium-pressure steam turbine to generate secondary steam partially transfers the energy of a high-temperature low-pressure steam (0.1 ÷ 0.15) MPa to the energy of a high-temperature secondary-steam of medium (4 MPa) or high pressure (more than 10 MPa) . The latter will make it possible to efficiently use the energy of the working fluid in a condensing steam turbine and to exclude steam overheating at the outlet of it.

The steam cooled in the steam generator is sent to the intermediate inlet of the condensing steam turbine.

The steam supply from the boiler with hydrocarbon fuel to the input of the steam condensing turbine in parallel with the secondary steam from the steam generator will allow for wide control of its power and heat recovery inside the cycle at a low temperature level, which will increase the cycle reversibility.

An electric-generating device with carbon-hydrogen fuel (hereinafter - the device) is presented in the form of a diagram.

The complex comprises a steam boiler 1 with hydrocarbon fuel, a high temperature high pressure steam turbine with an electric generator 2, a high temperature medium pressure steam turbine with an electric generator 3, a condensation steam turbine with an electric generator 4, a high temperature hydrogen superheater 5 in front of the turbine 2, a high temperature hydrogen superheater 3, and 6 steam generator 7, steam condenser 8, condensate pumps 9, 12, feed pumps 10, 11, flow rate controllers 1 3-16, regenerative feedwater heater 17.

The device operates as follows.

From the steam boiler, 1 steam is supplied through the steam line to the high-temperature high-pressure steam turbine 2. In it, the pressure and temperature of the steam decrease, as well as the conversion of mechanical energy into electrical energy. In a high-temperature hydrogen superheater there is an additional overheating of water vapor and an increase in its flow rate. Next, the steam enters the high-temperature medium-pressure steam turbine 3 and after it to the steam generator 7. In this turbine, temperatures decrease, for example, to 500–600 ° C, and absolute pressures, for example, to 0.12–0.15 MPa. In the steam generator 4, the temperature of the steam decreases, for example, to 110 ÷ 120 ° C and then it enters the intermediate input of the steam condensing turbine 4.

The secondary steam received in the steam generator is sent to the inlet of the turbine 4. Steam can also be supplied to the inlet of the turbine 4 from the steam boiler 1. This will make it possible to control its power and steam consumption in the selections, in particular, to the regenerative feed water heater 17, in a wide range of modes.

From the turbine exit 4 steam (steam-water mixture) enters the steam condenser 8 and then to the condensate pump 9. Next, the condensate enters the feed pumps 10 and 11. Condensate from the regenerative feed water heater 17 also comes to the same pumps. Regulation of steam and water consumption carried out by cost regulators 13-16.

The advantage of the proposed device is that it uses hydrocarbon and hydrogen fuels for continuous highly efficient power generation.

Claims (1)

A carbon-hydrogen fuel generating device comprising a steam boiler with hydrocarbon fuel, a high temperature high pressure steam turbine with an electric generator, a medium temperature high pressure steam turbine with an electric generator, a condensing steam turbine with an electric generator, a high temperature hydrogen steam superheater in front of the high temperature high temperature steam in front of a high temperature steam turbine pressure, water vapor condenser, steam generator, flow rate controllers, regenerative feed water heater, condensate pumps, feed pumps, is supplemented by the fact that the steam generator output via a heating steam is connected by a pipe to an intermediate input into a condensing steam turbine, the input of which is connected to the exits from a steam generator for a secondary steam and steam from a steam boiler, moreover, high-temperature steam turbines have their own feed pump, and the condensing steam turbine has its own feed an integral pump, the input of which is condensate from a steam condenser from a condensate pump and a regenerative feed water heater installed at the inlet to the steam boiler, and steam for heating the feed water comes from the selection of a condensing steam turbine through a steam line.

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