CN116025469A - Electrolytic water hydrogen production energy storage peak regulation system coupled with gas power station - Google Patents
Electrolytic water hydrogen production energy storage peak regulation system coupled with gas power station Download PDFInfo
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- CN116025469A CN116025469A CN202310173725.XA CN202310173725A CN116025469A CN 116025469 A CN116025469 A CN 116025469A CN 202310173725 A CN202310173725 A CN 202310173725A CN 116025469 A CN116025469 A CN 116025469A
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Abstract
The invention provides an electrolytic water hydrogen production energy storage peak regulation system coupled with a gas power station, which comprises: the combustion chamber is provided with a natural gas inlet, an air inlet and a fuel gas outlet; the inlet of the gas turbine is connected with the gas outlet of the combustion chamber; the input end of the first generator is connected with the power output end of the gas turbine; the first generator power generation end is connected with an output line; a water electrolysis cell having an electrolysis electrode, a hydrogen outlet and an oxygen outlet; the electrolytic pole is selectively connected with the first generator power generation end; a hydrogen storage tank having an inlet and an outlet; the inlet of the hydrogen storage tank is connected with the hydrogen outlet of the water electrolysis cell; a fuel cell having a hydrogen inlet, a flue gas outlet and a power transmission end; the hydrogen inlet of the fuel cell is connected with the outlet of the hydrogen storage tank; the fuel cell power transmission end is connected with an external transmission line; the fuel cell flue gas outlet is connected with the gas turbine inlet. The system overcomes the defect that the energy storage peak shaving system in the prior art relies on gravity energy storage to be limited by terrain and inconvenient to couple with a gas power station.
Description
Technical Field
The invention relates to the field of gas combined cycle, in particular to an electrolytic water hydrogen production energy storage peak regulation system coupled with a gas power station.
Background
The current power generation system can face the alternating phenomenon of the peak power consumption in the daytime and the valley power consumption at night, so that the peak shaving problem exists, and an energy storage peak shaving system capable of storing energy in the valley period and releasing energy in the peak period is developed. The energy storage means of the common energy storage peak shaving system comprise pumped storage, heavy object energy storage and the like, and in principle, the energy storage means are all used for transferring an object in a low position of a ground pattern to a high position of the ground pattern by using electric power in a valley period, and gravitational potential energy is released to generate electricity in a peak period. The mode is greatly limited by the topography factors, and an energy storage system is required to be built at a reservoir or a mountain, so that the energy storage peak shaving system is not beneficial to being popularized and used in a large range. Especially for the gas power station, the natural gas is mainly combusted to generate electricity, and the storage of the natural gas has the characteristics of large occupied area and more safety-related prevention and control measures, and the self address selection has more condition limitations, so that the natural gas is more unfavorable for being coupled with a gravity energy storage system.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that the energy storage peak shaving system in the prior art relies on gravity energy storage and is limited by terrain and inconvenient to couple with a gas power station.
In order to solve the technical problem, the application provides an electrolytic water hydrogen production energy storage peak shaving system coupled with a gas power station, which comprises:
the combustion chamber is provided with a natural gas inlet, an air inlet and a fuel gas outlet;
the inlet of the gas turbine is connected with the gas outlet of the combustion chamber;
the input end of the first generator is connected with the power output end of the gas turbine; the first generator power generation end is connected with an output line;
a water electrolysis cell having an electrolysis electrode, a hydrogen outlet and an oxygen outlet; the electrolytic pole is selectively connected with the first generator power generation end;
a hydrogen storage tank having an inlet and an outlet; the inlet of the hydrogen storage tank is connected with the hydrogen outlet of the water electrolysis cell;
a fuel cell having a hydrogen inlet, a flue gas outlet and a power transmission end; the hydrogen inlet of the fuel cell is connected with the outlet of the hydrogen storage tank; the fuel cell power transmission end is connected with an external transmission line; the fuel cell flue gas outlet is connected with the gas turbine inlet.
Optionally, an afterburner is provided between the fuel cell stack gas outlet and the gas turbine inlet.
Optionally, the method further comprises:
the waste heat boiler is provided with a flue gas channel and a steam outlet and is used for carrying out heat exchange on flue gas in the flue gas channel to generate steam;
the inlet of the steam turbine is connected with the steam outlet of the waste heat boiler;
the input end of the second generator is connected with the power output end of the steam turbine; the power generation end of the second generator is connected with the output line.
Optionally, the second generator power generation end is selectively connected with the water electrolysis cell electrolyte.
Optionally, the steam turbine further comprises a condenser, wherein the inlet of the condenser is connected with the outlet of the steam turbine; the waste heat boiler is provided with a water return port, and the outlet of the condenser is connected with the water return port of the waste heat boiler.
Optionally, the device further comprises a regenerator, wherein the regenerator is provided with a gas channel and a liquid channel and is suitable for exchanging heat between the gas channel and the liquid channel; the inlet of the liquid channel of the heat regenerator is connected with the outlet of the condenser; the outlet of the liquid channel of the heat regenerator is connected with a water return port of the waste heat boiler; the inlet of the gas channel of the heat regenerator is connected with the outlet of the steam turbine; the outlet of the gas channel of the heat regenerator is connected with the inlet of the condenser.
Optionally, a deaerator is also included; the deaerator has a hot gas inlet, a water inlet, and a water outlet; the hot gas inlet of the deaerator is connected with the outlet of the steam turbine; the deaerator water inlet is connected with the outlet of the heat regenerator liquid channel; the deaerator water outlet is connected with the waste heat boiler water return port.
Optionally, a condensate pump is provided between the regenerator gas passage outlet and the condenser inlet.
Optionally, a circulating water pump is arranged between the deaerator water outlet and the water return port of the waste heat boiler.
Optionally, a compressor is provided at the combustion chamber air inlet.
By adopting the technical scheme, the invention has the following technical effects:
according to the electrolytic water hydrogen production energy storage peak regulation system coupled with the gas power station, the chemical energy storage mode of electrolytic water hydrogen production is adopted, so that the limitation that gravity energy storage needs to depend on terrain is eliminated, and the gas power station site selection has flexibility; and although hydrogen is used as inflammable gas and has certain use safety risk, the gas power station is used as a large household using natural gas, has a sound and complete risk management system and capability for the inflammable gas, and therefore, the method has comprehensive advantages over other types of power stations in terms of hardware cost and management cost caused by increasing the use of hydrogen. And the fuel cell can continuously generate electric energy as long as the fuel and the oxidant (pure oxygen or air) are continuously input, so that the fuel cell has the characteristics of both a battery and a heat engine, and has the characteristics of high energy conversion efficiency, no environmental pollutant emission, low-temperature rapid start, low vibration and noise level and the like. When the fuel cell takes pure hydrogen as fuel, the chemical reaction product is only water, thereby fundamentally eliminating the emission of CO, NOx, SOx, dust and other atmospheric pollutants, realizing zero emission, and having the advantages of cleanness, reliability, mobility, long service life and the like. In addition, because the fuel cell has the characteristic of a heat engine, high-temperature smoke at nearly kilo DEG C can be generated after the reaction, and the part of smoke is led into the gas turbine, the output of the gas turbine can be increased, and the natural gas consumption can be reduced, so that the chemical energy during energy release is fully utilized, the energy storage and energy release conversion rate of the whole system is improved, the whole system has higher flexibility for ensuring the balance of power supply and demand relationship, and the fuel cell has important energy saving potential and development significance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Reference numerals illustrate:
1-a water electrolysis cell; 2-a hydrogen storage tank; 3-a fuel cell; 4-afterburner; 5-a compressor; 6-combustion chamber; 7-a gas turbine; 8-a first generator; 9-a waste heat boiler; 10-a steam turbine; 11-a second generator; 12-a condenser; 13-a condensate pump; 14-a regenerator; 15-deaerator; 16-a circulating water pump.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, in the description of the present invention, the coordinate system adopted in the description of the orientation is determined by the posture of the loading and unloading rod in the lifted use state, and the observation angle naming of the corresponding view is also based on this, so that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. in the description is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment provides an electrolytic water hydrogen production energy storage peak regulation system coupled with a gas power station.
In one embodiment, as shown in fig. 1, it comprises: a combustion chamber 6, a gas turbine 7, a first generator 8, a water electrolysis cell 1, a hydrogen storage tank 2 and a fuel cell 3. The combustion chamber 6 is an apparatus for burning natural gas to generate fuel gas, and is provided with a natural gas inlet, an air inlet, and a fuel gas outlet. The gas turbine 7 is a device for converting gas pressure into power, and its inlet is connected to the gas outlet of the combustor 6. The input end of the first generator 8 is connected with the power output end of the gas turbine 7. The power generation end of the first generator 8 is connected with an external transmission line and used for externally transmitting power. The water electrolysis cell 1 can be electrically operated to hydrolyze water, and has an electrolysis electrode, a hydrogen outlet and an oxygen outlet. The oxygen outlet can be connected with an oxygen split charging device, so that oxygen can be conveniently sold to the outside for industrial or medical use. The electrolytic pole is selectively connected with the power generating end of the first power generator 8 according to peak-valley conditions, is connected to store energy when the power consumption is low, and is disconnected when the power consumption is high, so that the generated energy of the first power generator 8 is completely output to the outside. The hydrogen tank 2 is a device for generating hydrogen gas after storing electrolyzed water, and has an inlet and an outlet. The inlet of the hydrogen storage tank 2 is connected with the hydrogen outlet of the water electrolysis cell 1. The fuel cell 3 is a power generation device that directly converts chemical energy in fuel into electric energy through an electrochemical reaction, and has a hydrogen inlet, a flue gas outlet, and a power transmission terminal. The hydrogen inlet of the fuel cell 3 is connected with the outlet of the hydrogen storage tank 2; the power transmission end of the fuel cell 3 is connected with an external transmission line; the flue gas outlet of the fuel cell 3 is connected with the inlet of the gas turbine 7.
When the energy storage peak shaving system is used, the water electrolysis cell 1 and the first generator 8 are connected when electricity is used in a valley, so that part of the generated energy of the first generator 8 is used for electrolyzing water, and then hydrogen and oxygen are generated. Hydrogen generated by electrolysis of water is stored in the hydrogen storage tank 2, thereby storing electric energy in a chemical energy manner. When electricity consumption is high, the water electrolysis cell 1 is disconnected from the first generator 8, hydrogen is input into the fuel cell 3 from the hydrogen storage tank 2, and then electricity is generated to compensate the generated energy of the first generator 8, so that the power supply amount of the whole system is increased to meet the requirement when the electricity consumption is high.
The energy storage peak shaving system adopts a chemical energy storage mode of hydrogen production by water electrolysis, so that the limitation that gravity energy storage needs to depend on terrain is eliminated, and the gas power station site selection has flexibility; and although hydrogen is used as inflammable gas and has certain use safety risk, the gas power station is used as a large household using natural gas, has a sound and complete risk management system and capability for the inflammable gas, and therefore, the method has comprehensive advantages over other types of power stations in terms of hardware cost and management cost caused by increasing the use of hydrogen. And the fuel cell can continuously generate electric energy as long as the fuel and the oxidant (pure oxygen or air) are continuously input, so that the fuel cell has the characteristics of both a battery and a heat engine, and has the characteristics of high energy conversion efficiency, no environmental pollutant emission, low-temperature rapid start, low vibration and noise level and the like. When the fuel cell takes pure hydrogen as fuel, the chemical reaction product is only water, thereby fundamentally eliminating the emission of CO, NOx, SOx, dust and other atmospheric pollutants, realizing zero emission, and having the advantages of cleanness, reliability, mobility, long service life and the like. In addition, because the fuel cell 3 has the characteristic of a heat engine, high-temperature flue gas with the temperature of nearly kilo DEG C can be generated after the reaction, and the introduction of the flue gas into the gas turbine 7 can increase the output of the gas turbine 7 and reduce the natural gas consumption, thereby fully utilizing the chemical energy during energy release, improving the energy storage and energy release conversion rate of the whole system, ensuring that the whole system has higher flexibility for ensuring the balance of the power supply and demand relationship, and having important energy saving potential and development significance.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, an afterburner 4 is provided between the flue gas outlet of the fuel cell 3 and the inlet of the gas turbine 7. The afterburner 4 can carry out supplementary combustion on residual hydrogen in the flue gas after the reaction of the fuel cell 3, and increases the heat energy of the flue gas after the reaction so as to increase the output in the subsequent gas turbine 7, thereby improving the energy utilization rate of the system.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, a compressor 5 is provided at the air inlet of the combustion chamber 6. The compressor 5 may be coaxial with the gas turbine 7. The addition of the compressor 5 can increase the oxygen content in the unit volume of the combustion chamber 6, thereby increasing the output power of the whole machine.
Based on the above embodiments, in a preferred embodiment, as shown in fig. 1, it further includes: a waste heat boiler 9, a steam turbine 10 and a second generator 11. The waste heat boiler 9 is a heat exchange device, which is provided with a flue gas channel and a steam outlet, and can be used for exchanging heat of flue gas in the flue gas channel so as to heat water in the flue gas channel to generate steam. The steam turbine 10 is a device for converting steam pressure into power, and its inlet is connected to the steam outlet of the waste heat boiler 9. The input end of the second generator 11 is connected with the power output end of the steam turbine 10; the power generating end of the second generator 11 is connected with an output line.
After the arrangement, the exhaust gas exhausted by the gas turbine 7 can be recycled, and the heat contained in the exhaust gas is recovered through the waste heat boiler 9, so that the power is generated through the steam power generation equipment, and the energy utilization efficiency of the whole system is improved.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, the power generating end of the second power generator 11 is selectively connected to the electrolyte electrode of the water electrolysis cell 1. The arrangement is similar to the first generator 8 which generates electricity by means of fuel gas, so that the electricity of the second generator 11 can be stored by hydrogen production through water electrolysis, and the electricity storage capacity of the whole system is improved.
Based on the above embodiments, in a preferred embodiment, as shown in FIG. 1, it further includes a condenser 12, the inlet of the condenser 12 being connected to the outlet of the steam turbine 10; the waste heat boiler 9 is provided with a water return port, and the outlet of the condenser 12 is connected with the water return port of the waste heat boiler 9. After the arrangement, the water circulation of the steam power generation equipment is formed, the water consumption of the steam power generation equipment is greatly reduced, the steam power generation equipment used as a large water consumer obtains high water resource utilization rate, the requirements on related water supply equipment are reduced, and the local hydrologic environment balance is protected.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, it further comprises a regenerator 14, wherein the regenerator 14 has a gas channel and a liquid channel, and is adapted to exchange heat between the gas channel and the liquid channel; the inlet of the liquid channel of the heat regenerator 14 is connected with the outlet of the condenser 12; the outlet of the liquid channel of the heat regenerator 14 is connected with a water return port of the waste heat boiler 9; the inlet of the gas channel of the heat regenerator 14 is connected with the outlet of the steam turbine 10; the outlet of the gas channel of the heat regenerator 14 is connected with the inlet of the condenser 12.
The heat energy carried by the exhaust gas exhausted by the steam turbine 10 can be recovered by adding the heat regenerator 14, so that the exhaust gas of the steam turbine 10 can preheat the backwater which is about to enter the waste heat boiler 9 through the heat regenerator 14, the heat required by the steam generated by the waste heat boiler 9 is reduced, and the energy utilization rate of the whole system is improved.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, it further comprises a deaerator 15; deaerator 15 has a hot gas inlet, a water inlet and a water outlet; the hot gas inlet of the deaerator 15 is connected with the outlet of the steam turbine 10; the water inlet of the deaerator 15 is connected with the outlet of the liquid channel of the heat regenerator 14; the water outlet of the deaerator 15 is connected with the water return port of the waste heat boiler 9. The deaerator is additionally arranged to remove corrosive substances such as oxygen in the boiler water, and the deaerator utilizes the exhaust heat discharged by the steam turbine 10 to evaporate the water, so that only water vapor exists on the water surface in the deaerator, the partial pressure of other gases is reduced, the discharge of gases such as oxygen contained in the water is further promoted, the harmful substances in the boiler water are removed, and finally the service lives of equipment and pipelines are prolonged.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, a condensate pump 13 is provided between the outlet of the gas passage of the regenerator 14 and the inlet of the condenser 12. This promotes the flow of condensate without any concern for the placement of the head of condenser 12 and regenerator 14 to create a water flow.
Based on the above embodiment, in a preferred embodiment, as shown in fig. 1, a circulating water pump 16 is provided between the water outlet of the deaerator 15 and the water return port of the waste heat boiler 9, so as to promote the flow of circulating water and make the waste heat boiler 9 timely replenish water.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. An electrolytic water hydrogen production energy storage peak shaving system coupled with a gas power station, which is characterized by comprising:
a combustion chamber (6) provided with a natural gas inlet, an air inlet and a gas outlet;
a gas turbine (7), the inlet of which is connected with the gas outlet of the combustion chamber (6);
the input end of the first generator (8) is connected with the power output end of the gas turbine (7); the power generation end of the first power generator (8) is connected with an output line;
a water electrolysis cell (1) having an electrolysis electrode, a hydrogen outlet and an oxygen outlet; the electrolytic pole is selectively connected with the power generation end of the first power generator (8);
a hydrogen storage tank (2) having an inlet and an outlet; an inlet of the hydrogen storage tank (2) is connected with a hydrogen outlet of the water electrolytic cell (1);
a fuel cell (3) having a hydrogen inlet, a flue gas outlet and a power transmission end; the hydrogen inlet of the fuel cell (3) is connected with the outlet of the hydrogen storage tank (2); the power transmission end of the fuel cell (3) is connected with an external transmission line;
the flue gas outlet of the fuel cell (3) is connected with the inlet of the gas turbine (7).
2. The electrolytic water hydrogen production energy storage peak shaver system coupled with a gas power station according to claim 1, wherein an afterburner (4) is arranged between the flue gas outlet of the fuel cell (3) and the inlet of the gas turbine (7).
3. The water electrolysis hydrogen production energy storage peak shaver system coupled to a gas power station according to claim 1, further comprising:
the waste heat boiler (9) is provided with a flue gas channel and a steam outlet and is used for carrying out heat exchange on flue gas in the flue gas channel to generate steam;
a steam turbine (10), the inlet of which is connected with the steam outlet of the waste heat boiler (9);
the input end of the second generator (11) is connected with the power output end of the steam turbine (10); the power generating end of the second generator (11) is connected with the output line.
4. A water electrolysis hydrogen production energy storage peak shaver system coupled with a gas power station according to claim 3, wherein the generating end of the second generator (11) is selectively connected with the electrolyte of the water electrolysis cell (1).
5. The electrolytic water to hydrogen production energy storage peak shaver system coupled with a gas power station according to claim 3, further comprising a condenser (12), wherein an inlet of the condenser (12) is connected with an outlet of the steam turbine (10); the waste heat boiler (9) is provided with a water return port, and the outlet of the condenser (12) is connected with the water return port of the waste heat boiler (9).
6. The electrolyzed water hydrogen production energy storage peak shaver system coupled to a gas power station according to claim 5, further comprising a regenerator (14), the regenerator (14) having a gas channel and a liquid channel and being adapted to exchange heat between the gas channel and the liquid channel; the inlet of the liquid channel of the heat regenerator (14) is connected with the outlet of the condenser (12); the outlet of the liquid channel of the heat regenerator (14) is connected with a water return port of the waste heat boiler (9); the inlet of the gas channel of the heat regenerator (14) is connected with the outlet of the steam turbine (10); the outlet of the gas channel of the heat regenerator (14) is connected with the inlet of the condenser (12).
7. The electrolytic water to hydrogen production, energy storage and peak shaving system coupled to a gas power station of claim 6, further comprising a deaerator (15); the deaerator (15) has a hot gas inlet, a water inlet and a water outlet; the hot gas inlet of the deaerator (15) is connected with the outlet of the steam turbine (10); the water inlet of the deaerator (15) is connected with the outlet of the liquid channel of the heat regenerator (14); the water outlet of the deaerator (15) is connected with the water return port of the waste heat boiler (9).
8. The electrolytic water hydrogen production energy storage peak shaver system coupled with a gas power station according to claim 6, wherein a condensate pump (13) is arranged between the outlet of the gas channel of the regenerator (14) and the inlet of the condenser (12).
9. The electrolytic water hydrogen production energy storage peak shaving system coupled with the gas power station as claimed in claim 7, wherein a circulating water pump (16) is arranged between the water outlet of the deaerator (15) and the water return port of the waste heat boiler (9).
10. The electrolytic water hydrogen production energy storage peak shaver system coupled with a gas power station according to claim 1, wherein a compressor (5) is arranged at an air inlet of the combustion chamber (6).
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| CN117735744A (en) * | 2023-11-27 | 2024-03-22 | 紫金矿业新能源新材料科技(长沙)有限公司 | Mine multi-clean energy utilization system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117735744A (en) * | 2023-11-27 | 2024-03-22 | 紫金矿业新能源新材料科技(长沙)有限公司 | Mine multi-clean energy utilization system |
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