阅读说明：本技术 一种背压式铝-蒸汽燃烧多联产储能系统及工作方法 (Back-pressure aluminum-steam combustion poly-generation energy storage system and working method ) 是由 白文刚 高炜 杨玉 张纯 杨浦 韩伟 李红智 姚明宇 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种背压式铝-蒸汽燃烧多联产储能系统及工作方法,该系统包括释能子系统和储能子系统；本发明通过将基于铝燃料储能、铝-蒸汽燃烧发电、蒸汽朗肯循环和制氢等进行有效地耦合,具有储能密度高、储能周期长可实现永久储存、燃料循环再生无消耗、可实现电力、氢气多联产和便于开展全球能源贸易等优点。(The invention discloses a back-pressure aluminum-steam combustion poly-generation energy storage system and a working method thereof, wherein the system comprises an energy release subsystem and an energy storage subsystem; the invention effectively couples the aluminum fuel energy storage, the aluminum-steam combustion power generation, the steam Rankine cycle, the hydrogen production and the like, and has the advantages of high energy storage density, long energy storage period, permanent storage, no consumption of fuel cycle regeneration, realization of poly-generation of electricity and hydrogen, convenience for developing global energy trade and the like.)

1. The utility model provides a back pressure type aluminium-steam combustion poly-generation energy storage system which characterized in that: comprises an energy release subsystem and an energy storage subsystem;

the energy release subsystem comprises an aluminum-steam combustion chamber (1), a heat regenerator (2), a gas-liquid condensation separator (3), a steam turbine (4), a power generation (5) and a condenser (2)6) And a feed pump (7); the outlet steam of the steam turbine (4) is divided into two paths, one path is communicated with the combustion steam inlet of the aluminum-steam combustion chamber (1), the other path is communicated with the hot side inlet of the condenser (6), the hot side outlet of the condenser (6) is communicated with the inlet of the water feed pump (7) after being mixed with newly supplemented water, the outlet of the water feed pump (7) is communicated with the cold side inlet of the heat regenerator (2), the cold side outlet of the heat regenerator (2) is communicated with the circulating working medium inlet of the aluminum-steam combustion chamber (1), the circulating working medium outlet of the aluminum-steam combustion chamber (1) is communicated with the inlet of the steam turbine (4), the fuel inlet of the aluminum-steam combustion chamber (1) is communicated with aluminum fuel supply, in the aluminum-steam combustion chamber (1), aluminum fuel and steam are subjected to combustion exothermic reaction, and the reaction equation is 2Al + 3H.₂O＝Al₂O₃+3H₂The aluminum-steam combustion system comprises an aluminum-steam combustion chamber (1), a heat regenerator (2), a gas-liquid condensation separator (3), a hydrogen gas outlet, a condensate water outlet, a heat recovery device and a heat recovery device, wherein solid product aluminum oxide generated by aluminum-steam combustion is discharged through the bottom of the aluminum-steam combustion chamber (1) and collected, a high-temperature gas mixture generated by the aluminum-steam combustion is communicated with the heat side inlet of the heat regenerator (2) through a gas product outlet of the aluminum-steam combustion chamber (1), the heat side outlet of the heat regenerator (2) is communicated with the inlet of the gas-liquid condensation separator (3), water vapor in the gas mixture is condensed and then separated from hydrogen gas in the gas-liquid condensation separator (3), and the gas-liquid condensation separator (3) is provided with two outlets, one of which is the hydrogen gas outlet and the other of the condensate water outlet;

the energy storage subsystem comprises an alumina electrolysis plant (8) and a renewable energy power supply (9); the material inlet of the alumina electrolysis device (8) is communicated with alumina supply, namely is communicated with the bottom solid product alumina outlet of the aluminum-steam combustion chamber (1), the power supply of the alumina electrolysis device (8) is connected with renewable energy power supply (9), electrochemical reaction is carried out in the alumina electrolysis device (8), aluminum liquid is generated on the cathode of the alumina electrolysis device (8), solid aluminum fuel is obtained after condensation and collection, and the solid aluminum fuel is communicated with the fuel inlet of the aluminum-steam combustion chamber (1).

2. The back-pressure aluminum-steam combustion poly-generation energy storage system of claim 1, wherein: the steam turbine (4) is coaxially connected with a generator (5), and the generator (5) generates electricity to supply power to the outside.

3. The back-pressure aluminum-steam combustion poly-generation energy storage system of claim 1, wherein: and hydrogen at the hydrogen outlet of the gas-liquid condensation separator (3) is used as fuel of a hydrogen fuel cell or a hydrogen gas turbine.

4. The back-pressure aluminum-steam combustion poly-generation energy storage system of claim 1, wherein: the power in the renewable energy power supply (9) is from photovoltaic power generation, wind power generation, photo-thermal power generation, hydro power generation and/or biomass power generation.

5. The method of operating a back-pressure aluminum-steam combustion poly-generation energy storage system of any of claims 1 to 4, wherein: when the renewable energy in the power grid system generates excessive or surplus power, the fused alumina is electrolyzed by the alumina electrolysis device (8), and the renewable energy power is converted into chemical energy of aluminum fuel through electrochemical reaction and stored; when the power generation of renewable energy sources in a power grid system is insufficient or other geographical positions in the world need power supply, the chemical energy of aluminum fuel is converted into electric energy through the aluminum-steam combustion chamber (1) and steam Rankine cycle power generation, power supply is realized to the outside, hydrogen can be prepared in a synergistic manner, and the hydrogen has wide industrial application; the solid product alumina of the aluminum-steam combustion enters the whole energy storage subsystem again, and the aluminum fuel is obtained again through the electrolysis of the alumina electrolysis device (8), so that the cyclic utilization is realized, and the alumina is not consumed in the whole process.

Technical Field

The invention belongs to the technical field of green power generation and advanced energy storage, and particularly relates to a back-pressure aluminum-steam combustion poly-generation energy storage system and a working method.

Background

With the global atmospheric pollution and climate warming trend becoming more severe, the traditional power generation system mainly using fossil energy will face unprecedented pressure and challenge. From a worldwide perspective, countries are striving to increase the proportion of renewable energy sources in their own power structures to generate electricity. In the future, the development trend in the world energy field is bound to be a gradual replacement of fossil energy by renewable energy. However, the renewable energy source seriously hinders the development of the renewable energy power generation due to the characteristics of intermittency, instability, uncertainty and the like of the renewable energy source. In the future, renewable energy sources are required to replace fossil energy sources, and development and support of large-scale and long-period energy storage technologies are required.

At present, research in the field of energy storage technology is active, and various energy storage technologies, such as pumped storage, compressed air storage, lithium battery storage, super capacitor storage, flywheel storage, hydrogen storage, etc., are rapidly developed. However, the existing energy storage technology has difficulty in meeting the requirements of high energy storage density, mobility, low self-consumption loss and global energy trade at the same time. Therefore, there is a need to develop a new energy storage technology, so that renewable energy power generation is developed to a deeper and wider direction worldwide.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a back-pressure aluminum-steam combustion poly-generation energy storage system and a working method thereof, the system effectively couples aluminum fuel energy storage, aluminum-steam combustion, steam Rankine cycle power generation, hydrogen production and the like, and has the advantages of high energy storage density, long energy storage period, capability of realizing permanent storage, no consumption of fuel cycle regeneration, capability of realizing poly-generation of electric power and hydrogen, convenience for developing global energy trade and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a back-pressure aluminum-steam combustion poly-generation energy storage system comprises an energy release subsystem and an energy storage subsystem;

the energy release subsystem comprises an aluminum-steam combustion chamber 1, a heat regenerator 2, a gas-liquid condensation separator 3, a steam turbine 4, a generator 5, a condenser 6 and a water feeding pump 7; the outlet steam of the steam turbine 4 is divided into two paths, one path is communicated with a combustion steam inlet of the aluminum-steam combustion chamber 1, the other path is communicated with a hot side inlet of the condenser 6, a hot side outlet of the condenser 6 is communicated with an inlet of the water feed pump 7 after being mixed with newly supplemented water, an outlet of the water feed pump 7 is communicated with a cold side inlet of the heat regenerator 2, a cold side outlet of the heat regenerator 2 is communicated with a circulating working medium inlet of the aluminum-steam combustion chamber 1, a circulating working medium outlet of the aluminum-steam combustion chamber 1 is communicated with an inlet of the steam turbine 4, a fuel inlet of the aluminum-steam combustion chamber 1 is communicated with aluminum fuel supply, in the aluminum-steam combustion chamber 1, the aluminum fuel and the steam are subjected to combustion exothermic reaction, and the reaction equation is 2Al +3H₂O＝Al₂O₃+3H₂The solid product alumina generated by the aluminum-steam combustion is discharged and collected through the bottom of the aluminum-steam combustion chamber 1, the high-temperature gas mixture generated by the aluminum-steam combustion is communicated with the hot side inlet of the heat regenerator 2 through the gas product outlet of the aluminum-steam combustion chamber 1, the hot side outlet of the heat regenerator 2 is communicated with the inlet of the gas-liquid condensation separator 3, the water vapor in the gas mixture is separated from the hydrogen after being condensed in the gas-liquid condensation separator 3, and the gas-liquid condensation separator 3 is provided with two outlets, wherein one outlet is a hydrogen outlet, and the other outlet is a condensed water outlet;

the energy storage subsystem comprises an alumina electrolysis device 8 and a renewable energy power supply 9; the material inlet of the alumina electrolysis device 8 is communicated with the alumina supply, namely is communicated with the bottom solid product alumina outlet of the aluminum-steam combustion chamber 1, the power supply of the alumina electrolysis device 8 is connected with the renewable energy power supply 9, electrochemical reaction is carried out in the alumina electrolysis device 8, aluminum liquid is generated on the cathode of the alumina electrolysis device 8, solid aluminum fuel is obtained after condensation and collection, and the solid aluminum fuel is communicated with the fuel inlet of the aluminum-steam combustion chamber 1.

The steam turbine 4 is coaxially connected with a generator 5, and the generator 5 generates electricity to supply power to the outside.

The hydrogen gas at the hydrogen gas outlet of the gas-liquid condensation separator 3 is used as fuel for a hydrogen fuel cell or a hydrogen gas turbine.

The power in the renewable energy power supply 9 is from photovoltaic power generation, wind power generation, photo-thermal power generation, hydro power generation, and/or biomass power generation.

The invention has the beneficial effects that:

the back-pressure aluminum-steam combustion poly-generation energy storage system has the following advantages: (1) the energy density of the metal fuel aluminum is high; (2) the aluminum fuel does not contain carbon, and pollutants are not generated in the whole working process of the system, so that the system is a green low-carbon power generation technology; (3) renewable energy power is converted into chemical energy of metal fuel aluminum for storage through electrochemical reaction, and the method has the advantages of long energy storage period and capability of realizing permanent storage; (4) after the aluminum-steam combustion reaction in the whole process, the combustion solid product can be regenerated by electrolysis to obtain metal fuel aluminum, and the fuel aluminum is regenerated circularly without consumption in the whole process; (5) the hydrogen can be produced in a synergic manner while generating electricity; (6) the energy is stored through the metal fuel aluminum, so that the energy trade in the global range is conveniently developed.

Drawings

FIG. 1(a) is a schematic structural diagram of the energy release subsystem of the present invention.

Fig. 1(b) is a schematic diagram of an energy storage subsystem of the present invention.

Wherein, 1 is an aluminum-steam combustion chamber, 2 is a heat regenerator, 3 is a gas-liquid condensation separator, 4 is a steam turbine, 5 is a generator, 6 is a condenser, 7 is a feed water pump, 8 is an aluminum oxide electrolysis device, and 9 is renewable energy power supply.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, a back-pressure aluminum-steam combustion poly-generation energy storage system includes an energy release subsystem and an energy storage subsystem;

the energy release subsystem comprises an aluminum-steam combustion chamber 1, a heat regenerator 2, a gas-liquid condensation separator 3, a steam turbine 4, a generator 5, a condenser 6 and a water feeding pump 7; the outlet steam of the steam turbine 4 is divided into two paths, one path is communicated with a combustion steam inlet of the aluminum-steam combustion chamber 1, the other path is communicated with a hot side inlet of the condenser 6, a hot side outlet of the condenser 6 is communicated with an inlet of the water feed pump 7 after being mixed with newly supplemented water, an outlet of the water feed pump 7 is communicated with a cold side inlet of the heat regenerator 2, a cold side outlet of the heat regenerator 2 is communicated with a circulating working medium inlet of the aluminum-steam combustion chamber 1, a circulating working medium outlet of the aluminum-steam combustion chamber 1 is communicated with an inlet of the steam turbine 4, a fuel inlet of the aluminum-steam combustion chamber 1 is communicated with aluminum fuel supply, in the aluminum-steam combustion chamber 1, the aluminum fuel and the steam are subjected to combustion exothermic reaction, and the reaction equation is 2Al +3H₂O＝Al₂O₃+3H₂The solid product alumina generated by the aluminum-steam combustion is discharged and collected through the bottom of the aluminum-steam combustion chamber 1, the high-temperature gas mixture generated by the aluminum-steam combustion is communicated with the hot side inlet of the heat regenerator 2 through the gas product outlet of the aluminum-steam combustion chamber 1, the hot side outlet of the heat regenerator 2 is communicated with the inlet of the gas-liquid condensation separator 3, the water vapor in the gas mixture is separated from the hydrogen after being condensed in the gas-liquid condensation separator 3, and the gas-liquid condensation separator 3 is provided with two outlets, wherein one outlet is a hydrogen outlet, and the other outlet is a condensed water outlet;

the energy storage subsystem comprises an alumina electrolysis device 8 and a renewable energy power supply 9; the material inlet of the alumina electrolysis device 8 is communicated with the alumina supply, namely is communicated with the bottom solid product alumina outlet of the aluminum-steam combustion chamber 1, the power supply of the alumina electrolysis device 8 is connected with the renewable energy power supply 9, electrochemical reaction is carried out in the alumina electrolysis device 8, aluminum liquid is generated on the cathode of the alumina electrolysis device 8, solid aluminum fuel is obtained after condensation and collection, and the solid aluminum fuel is communicated with the fuel inlet of the aluminum-steam combustion chamber 1.

As a preferred embodiment of the present invention, the hydrogen gas outlet hydrogen gas of the gas-liquid condensation separator 3 is used as a fuel for a hydrogen fuel cell or a hydrogen gas turbine.

As a preferred embodiment of the invention, the electricity in the renewable energy power supply 9 is derived from photovoltaic power generation, wind power generation, photo-thermal power generation, hydro-power generation and/or biomass power generation.

The back-pressure aluminum-steam combustion poly-generation energy storage system takes aluminum oxide as a raw material, and when renewable energy sources in a power grid system generate excessive or surplus power, the molten aluminum oxide is electrolyzed by the aluminum oxide electrolysis device 8, so that the electricity of the renewable energy sources is converted into chemical energy of aluminum fuel through electrochemical reaction for storage. When the power generation of renewable energy sources in a power grid system is insufficient or other geographical positions in the world need power supply, the chemical energy of the aluminum fuel is converted into electric energy through the aluminum-steam combustion chamber 1 and the steam Rankine cycle power generation, the power supply is realized to the outside, and the hydrogen can be prepared in a coordinated manner, so that the hydrogen has wide industrial application, such as a hydrogen fuel cell, a hydrogen gas turbine and the like. The solid product alumina of the aluminum-steam combustion can reenter the whole energy storage subsystem, and the aluminum fuel is obtained again through the electrolysis of the alumina electrolysis device 8, so that the cyclic utilization is realized, and the alumina is not consumed in the whole process.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.