RU64699U1 - ELECTRIC GENERATING DEVICE WITH HIGH-TEMPERATURE STEAM TURBINE - Google Patents

Abstract

The utility model relates to the field of energy and can be used to generate electricity using a high-temperature steam turbine with combined, including hydrogen, fuel. The purpose of the utility model is the creation of an electric generating complex for highly efficient continuous production of electricity. The device comprises a steam boiler 1, a unit for steam conversion of natural gas to hydrogen 2, a unit for producing oxygen from air 3, a high-temperature Н ₂ / О ₂ superheater 4, a steam turbine 5 with an electric generator 6 and a condenser 7, a recovery boiler 8. Il. one.

Description

The device relates to the field of energy and can be used to produce electricity using combined organic and hydrogen fuels.

A device is known (Patent RU for utility model No. 30848 C2 dated 10.10.2002), comprising a steam boiler, N ₂ / O ₂ - a steam generator, a steam and gas-steam turbine with electric generators, a hydrogen and oxygen generation system using electrolysis and their storage system .

Its disadvantage is that it uses an electrolyzer to produce H ₂ and O ₂ , contains two turbines and two electric generators, and a gas-steam turbine using hydrogen fuel can operate only periodically with the interval necessary for the accumulation of hydrogen and oxygen in special plants.

The closest in technical essence is a device (RU patent for utility model No. 54631 dated 06/08/05), containing a steam boiler, a plant for the production of hydrogen by conversion from natural gas, H ₂ / O ₂ steam generator (high temperature H ₂ / O ₂ - superheater), a steam turbine with an electric generator and a steam condenser, a heat recovery boiler.

Its disadvantages include the fact that the unspecified allowable amount of non-condensable gases in H ₂ and O ₂ entering H ₂ / O ₂ is a steam generator, the ratio of the costs of H ₂ and O ₂ . These indicators can affect the operation of the capacitor and reduce the energy efficiency of the installation as a whole. The sources and working media for oxygen production and cooling of the turbine flow section are not indicated.

The purpose of the utility model is the creation of an electric generating complex for highly efficient continuous production of electricity using combined, including hydrogen, fuel, as well as eliminating energy loss during transport and storage of hydrogen.

The essence of the utility model lies in the fact that the device contains a steam boiler, high-temperature Н ₂ / О ₂ - a superheater, a heat recovery boiler, a steam turbine with an electric generator and a condenser, a plant for producing hydrogen from natural gas by the conversion method, and the new thing is that the device an installation for the production of oxygen by air separation is included, and the total impurities of non-condensable gases at a temperature of from 20 to 100 ° C in hydrogen and oxygen should be less than 0.5% by volume, with the low-temperature superheater is connected to the outlet of the steam boiler and the exits from the plants for the production of hydrogen and oxygen with hydrogen and oxygen consumption in proportions close (about ± 1%) to stoichiometric in order to ensure their complete combustion in water vapor without an intermediate heat-exchange surface, and the output of the high-temperature the superheater is connected to the entrance to the steam turbine, and the output of the plant for the production of hydrogen by flue gases is connected to the gas path of the heat recovery boiler, and, in addition to moreover, the steam outlet from the heat recovery boiler is coupled to an intermediate inlet to the steam turbine and (or) a cooling system for the flow part of the steam turbine.

The inclusion in the power plant of a plant for the production of hydrogen from natural gas and a plant for the production of oxygen by air separation will allow continuous operation of a steam turbine with a rated power at high initial temperature and pressure. The high temperature of water vapor up to 2000 K at the entrance to the steam turbine due to the combustion of hydrogen with oxygen in a water vapor medium without an intermediate heat exchange surface after it leaves the steam boiler in a high-temperature Н ₂ / О ₂ - superheater ensures its operation in the modes typical for gas turbines, and the output of the steam turbine is connected to a steam condenser, providing a pressure below atmospheric. An increase in the initial temperature and a decrease in the temperature at the outlet of the turbine, as well as a decrease in steam humidity, will make it possible to increase the energy efficiency of electricity production.

It should be noted that the heating of water vapor in modern steam boilers above 900 K is virtually impossible due to burnout of pipes regardless of the type of fuel (natural gas, hydrogen, coal, etc.).

A diagram of the proposed device is presented in the drawing.

The device comprises a steam boiler 1, an installation for steam production of hydrogen from natural gas by the conversion method 2, an installation for oxygen production by air separation 3, a high-temperature Н ₂ / О ₂ - superheater 4, a steam turbine 5 with an electric generator 6 and a condenser 7, a recovery boiler 8 .

The device operates as follows.

From the steam boiler, 1 steam enters the high-temperature Н ₂ / О ₂ - superheater 4. In the high-temperature Н ₂ / О ₂ - superheater, water vapor overheats due to the ingress and burning of hydrogen and oxygen in it in the medium of water vapor without an intermediate heat exchange surface. For the beneficial use of the energy of the exhaust gases from the installation for converting natural gas to hydrogen, a recovery boiler 8 is installed, the steam output from which is connected to the intermediate steam input to the turbine 5 with an electric generator 6 and / or a cooling system for the turbine flow part. Next, the steam enters the condenser 7.

These features of the device allow to achieve a higher coefficient of efficiency in terms of generated electricity in relation to existing steam turbine plants. The advantage of this device is that coal, fuel oil, alternative fuels and renewable energy sources can be used to generate steam and ensure its initial overheating. The inclusion in the composition of the device installation for the production of hydrogen from natural gas by the conversion method eliminates the cost of transportation and storage of hydrogen, eliminates the possibility of explosion of a large amount of hydrogen, ensures the continuity of operation of the device with rated power.

Claims (1)

An electric generating device with a high temperature steam turbine for continuous power generation, comprising a steam boiler, a steam turbine with an electric generator and a condenser, a high temperature H ₂ / O ₂ superheater, a heat recovery boiler, a plant for the production of hydrogen from natural gas by a conversion method, characterized in that an installation for the production of oxygen by air separation is included, and the total impurities of non-condensable gases at a temperature of from 20 to 100 ° C in hydrogen de and oxygen should be less than 0.5% by volume, and the entrances to the high-temperature superheater are connected to the outlet of the steam boiler and the exits from the plants for the production of hydrogen and oxygen with hydrogen and oxygen consumption in proportions close (about ± 1%) to stoichiometric , to ensure their complete combustion in the medium of water vapor without an intermediate heat exchange surface, and the output of the high-temperature superheater is connected to the inlet of the steam turbine, and the output of the plant for the production of hydrogen by flue gas connected to a gas path heat-recovery boiler, and in addition, the yield of the heat-recovery boiler for steam is connected to an intermediate input to a steam turbine, and (or) cooling the flow part of the steam turbine.