CN109595074B - Gas turbine system and heat storage and release method thereof - Google Patents

Abstract

The invention discloses a gas turbine system and a method for storing and releasing heat. The system includes a combustion chamber and a power generation device, the combustion chamber is used to generate high-temperature gas, and the high-temperature gas enters the power generation device for power generation; it also includes: a particle circulation device and an air compressor; a solar heat absorber for absorbing solar energy; solar energy reforming The heat exchanger is connected with the solar heat absorber, and the solar reformer is provided with reducing substances; the heat exchanger is provided with a reaction cavity and a heat exchange cavity, and the two ends of the reaction cavity are respectively connected with the solar reformer and the particles. The circulation device is connected, the two ends of the heat exchange chamber are respectively connected with the air compressor and the combustion chamber; the two ends of the particle circulation device are respectively connected with the reaction chamber and the solar heat absorber. The system can realize the complementary energy storage of metal oxides and reducing substances, store external heat sources such as solar energy in the form of chemical energy, and supply heat to the gas turbine according to the needs of the gas turbine, and has the advantages of high system efficiency, compact size and low cost. specialty.

Description

Gas turbine system and heat storage and heat release method therefor

technical field

The invention relates to the technical field of energy, in particular to a gas turbine system and a heat storage and heat release method.

Background technique

The total global solar radiation is about 1.7×10 ¹⁷ W, of which China accounts for about 1% (1.8×10 ¹⁵ W, equivalent to 1.9 trillion tons of standard coal/year), which is 680 times the current total annual energy consumption in China. It has huge development potential. Solar power generation technology is mainly divided into two categories: photovoltaic power generation and solar thermal power generation. Photovoltaic power generation has many disadvantages, such as discontinuous day and night, serious pollution in the manufacturing process of photovoltaic panels, high cost and short service life. Solar thermal power generation can use cheap energy storage technology to stabilize the output of power generation, which can be used as both basic load power supply and peak-shaving power supply. Therefore, solar thermal power generation has great potential in the future.

Solar thermal power generation mainly includes trough thermal power generation, linear Fresnel thermal power generation, tower thermal power generation and dish thermal power generation technology. The basic principle is mainly to use concentrating parabolic reflectors to gather sunlight, generate steam through photothermal conversion and heat exchange devices or heat fluids to drive heat engines to generate electricity; And fuel replenishment to achieve continuous power generation day and night.

The heat engine in the solar thermal power generation system generally adopts a steam turbine, and the system is complicated and the efficiency is not high. A gas turbine is also a heat engine, and a simple gas turbine system consists of a compressor, a combustion chamber, and a gas turbine. It has the advantages of high specific power, low vibration and noise, long life, easy maintenance, etc., and is widely used, but the efficiency of simple gas turbine cycle is low, and the heat loss of exhaust gas is large. overall system efficiency. The existing solar gas turbine system adds a solar air heat absorber to a simple gas turbine system, that is, the air from the compressor is preheated by the solar air heat absorber, and then enters the combustion chamber to burn to generate high-temperature gas, and finally enters the gas turbine to do external work. Compared to simple gas turbine systems, solar gas turbine systems increase the amount of air heat entering the combustion chamber and reduce fuel consumption. However, whether it is a simple gas turbine system or a solar gas turbine system, the exhaust gas temperature of the gas turbine is very high, and the heat loss is large. Although the gas-steam combined cycle system can improve the system efficiency, it is too complicated and the cost is too high.

In addition to this, the lack and high cost of thermochemical energy storage technology combined with solar gas turbines is another challenge. Energy storage technology can be divided into sensible heat energy storage, latent heat energy storage and thermochemical energy storage according to the energy storage method. Sensible heat energy storage is to store thermal energy through temperature increase without changing the material form, and the energy storage density is low. The latent heat energy storage stores thermal energy in the form of phase change, and the phase change heat needs to absorb a large amount of heat, so the latent heat energy storage density is higher than the sensible heat energy storage. The use of chemical energy to store solar energy not only makes the energy storage density high, but also can be stored at room temperature for a long time, which is convenient for transportation.

At present, the research on medium and high temperature solar thermal chemical energy storage is mostly aimed at producing clean fuel hydrogen. The common two-step hydrolysis of metal oxides to produce hydrogen is due to the high temperature required for the thermal decomposition and reduction of metal oxides in the first step. Usually around 1500°C, the requirements for solar collectors are very high, resulting in large heat loss. However, the high-temperature solar energy storage system has a single design, only considers one thermochemical reaction, the reaction conditions are harsh, the energy storage form is single, and the economy and applicability need to be verified, which limits its commercialization.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems of low thermal efficiency and high cost of the existing solar gas turbine system, and to provide a gas turbine system that can not only improve the energy utilization efficiency but also reduce the system cost, and a heat storage and heat release method for the gas turbine system.

The object of the present invention is achieved through the following technical solutions:

The invention provides a gas turbine system, comprising: a combustion chamber and a power generation device, the combustion chamber is used to generate high-temperature gas, and the generated high-temperature gas enters the power generation device and is used for power generation;

In addition, the gas turbine system includes:

Particle circulation device and air compressor;

Solar heat absorbers for absorbing solar energy;

The solar reformer is connected with the solar heat absorber, and a reducing substance is arranged in the solar reformer;

The heat exchanger is provided with a reaction cavity and a heat exchange cavity. The two ends of the reaction cavity are respectively connected with the solar reformer and the particle circulation device, and the two ends of the heat exchange cavity are respectively connected with the air compressor and the combustion chamber. ;

The two ends of the particle circulation device are respectively connected to the reaction chamber and the solar heat absorber;

A number of heat storage particles are arranged in the solar heat absorber, and the heat storage particles include high-valence metal oxide particles, wherein the high-valence metal oxide particles react under the action of the solar energy absorbed by the solar heat absorber and are converted into low-valence state Metal oxide particles, which store thermal energy;

The heat storage particles enter the solar reformer from the solar heat absorber, and undergo a reduction reaction with reducing substances, wherein the low-valence metal oxide particles are converted into metal element particles to further store thermal energy;

The heat storage particles enter the reaction chamber of the heat exchanger from the solar reformer, and at least some or all of the heat storage particles undergo oxidation reaction with air to generate high-valence metal oxide particles, and release heat to preheat and send it from the air compressor to the heat exchange chamber. The preheated air enters the combustion chamber and participates in the combustion;

The heat storage particles enter the particle circulation device from the reaction chamber of the heat exchanger and are transported to the solar heat absorber.

Compared with the prior art, the gas turbine system provided by the present invention can realize the complementary energy storage of metal oxides and reducing substances, and stably store external heat sources such as solar energy in the form of chemical energy; Heating, thereby eliminating the fluctuation of solar energy, while increasing the proportion of solar energy, reducing the consumption of fossil fuels.

In addition, the gas turbine system provided by the present invention also has the characteristics of high system efficiency, compact size and low cost. Specifically, when high-valence metal oxides are reduced to low-valence metal oxides, the required temperature is relatively low, around 1000 °C; and the temperature for further reduction of low-valence metal oxides to elemental metals generally reaches Above 1500℃. The gas turbine device in the prior art uses solar energy to heat to this temperature, which not only causes a large heat dissipation loss, but also has high requirements on the material and manufacturing process of the reactor, thus inevitably increasing the system cost. In the gas turbine system provided by the present invention, the reaction temperature of the reforming reaction between reducing substances and low-valent metal oxides in the solar reformer is 1000°C or even below, the requirements for the reactor are greatly reduced, and the cost is obtained. Effective control. At the same time, the reaction is an endothermic reaction, and the heat energy is stored in the form of chemical energy in the elemental metal and synthesis gas generated by the reaction. The reaction temperature of the produced synthesis gas and hydrogen in the combustion chamber can be higher than 1500 ° C, which is much higher than that of solar energy collection. The hot temperature meets the high temperature working requirements of the gas turbine and ensures the high efficiency of the gas turbine system provided by the present invention.

Preferably, the reaction cavity in the heat exchanger is communicated with the heat exchange cavity, and the air fed into the heat exchange cavity by the air compressor participates in the oxidation reaction between the heat storage particles and the air in the reaction cavity.

Further, preferably, the gas turbine system provided by the present invention further comprises: a hot tank connected between the solar heat absorber and the solar reformer; a cold tank connected between the heat exchanger and the particle circulation device time; both hot and cold tanks are used to temporarily store hot pellets.

Preferably, the reducing substance set in the solar reformer is a substance containing carbon and/or hydrogen; the solar reformer is connected with the combustion chamber; when the heat storage particles enter the solar reformer from the solar heat absorber, the low The valence metal oxide particles undergo a reduction reaction with a reducing substance, and are converted into metal element particles, and carbon monoxide and/or hydrogen are generated at the same time, and the carbon monoxide and/or hydrogen are sent into the combustion chamber to participate in the combustion reaction.

Further, preferably, the gas turbine system provided by the present invention further comprises: a hydrogen production reactor connected and arranged between the solar reformer and the heat exchanger, and the hydrogen production reactor is provided with a water vapor inlet for communicating Enter water vapor; the hydrogen production reactor is connected to the combustion chamber; the heat storage particles enter the hydrogen production reactor from the solar reformer, wherein the metal particles react with water vapor to generate low-valent metal oxide particles and hydrogen, and the hydrogen enters the combustion chamber Participate in combustion; heat storage particles enter the reaction chamber of the heat exchanger from the hydrogen production reactor.

Further, preferably, the gas turbine system provided by the present invention also includes: a steam generator and a water pump, a tail gas channel and a water vapor channel are arranged in the steam generator, the exhaust gas channel is connected with the power generation device, and one end of the water vapor channel is connected to generate electricity. The other end is connected to the water vapor inlet of the hydrogen production reactor; the tail gas generated by the power generation device is discharged through the tail gas channel, the feed water of the pump is heated and evaporated by the tail gas, and the generated water vapor enters the hydrogen production reactor through the water vapor inlet.

The present invention also provides a heat storage and heat release method for a gas turbine system, comprising the following steps:

The first-stage heat storage step: reacting the heat storage particles containing the high-valence metal oxide particles at a high temperature in the solar heat absorber, wherein the high-valence metal oxide particles are converted into low-valence metal oxide particles, and stored thermal energy;

The second-stage heat storage step: the heat storage particles enter the solar reformer from the solar heat absorber, and undergo a reduction reaction with the reducing substances located in the solar reformer; wherein, the low-valence metal oxide particles are converted into metal element particles , to further store thermal energy;

Exothermic step: The heat storage particles enter the reaction chamber of the heat exchanger from the solar reformer, and at least some or all of the heat storage particles undergo oxidation reaction with air to generate high-valence metal oxide particles, and release heat to preheat and send them from the air compressor. The air in the heat exchange chamber, the preheated air enters the combustion chamber and participates in the combustion;

Particle circulation step: the heat storage particles enter the particle circulation device from the reaction chamber of the heat exchanger, and are circulated to the solar heat absorber.

Compared with the prior art, the above-mentioned heat storage and heat release method is applied to the gas turbine system provided by the present invention, and the reducing substance is used to carry out the reformation reaction with the low-valence metal oxide, thereby improving the energy storage density; and Compared with the metal oxide two-step hydrogen production method, the hydrogen production temperature of metal element is lower, and the reaction conditions are milder. Combined with the gas turbine system and the heat storage and release method provided by the present invention, the metal oxide energy storage is combined with the gas turbine application, and the multi-energy complementation and the cascade utilization of the chemical energy of reducing substances can be better realized.

Preferably, between the first-stage heat storage step and the second-stage heat storage step, the following steps are further included: the heat storage particles enter the heat tank for temporary storage; between the second-stage heat storage step and the heat release step, the following steps are further included. The steps are as follows: the heat storage particles enter the cold tank for temporary storage.

Preferably, in the second-stage heat storage step, the reducing substance is a substance containing carbon and/or hydrogen; when the heat storage particles enter the solar reformer from the solar heat absorber, the low-valence metal oxide particles in the low-valence metal oxide particles and The reducing substance undergoes a reduction reaction, is converted into metal element particles, and generates carbon monoxide and/or hydrogen at the same time, and the carbon monoxide and/or hydrogen are sent to the combustion chamber to participate in the combustion reaction.

Preferably, between the second-stage heat storage step and the heat release step, the following step is further included: the heat storage particles enter the hydrogen production reactor from the solar reformer, and the metal element particles react with water vapor to generate low-cost state metal oxide particles and hydrogen, the hydrogen enters the combustion chamber to participate in the combustion; the heat storage particles enter the reaction chamber of the heat exchanger from the hydrogen production reactor.

Description of drawings

FIG. 1 is a schematic diagram of a gas turbine system according to a first embodiment of the present invention;

2 is a schematic diagram of a gas turbine system according to a second embodiment of the present invention.

Description of reference numbers:

1-Solar heat absorber; 2-Hot tank; 3-Solar reformer; 4-Heat exchanger; 5-Cold tank; 6-Particle circulation device; 7-Air compressor; 8-Combustion chamber; 9-Power generation device; 10-steam generator; 11-water pump; 12-hydrogen production reactor.

Detailed ways

Embodiment 1:

The first embodiment of the present invention provides a solar gas turbine system, as shown in FIG. 1 , including: a combustion chamber 8 and a power generation device 9 , the combustion chamber 8 is used to generate high-temperature gas, and the generated high-temperature gas enters the power generation device 9 and is used to generate electricity;

Also includes: particle circulation device 6 and air compressor 7;

A solar heat absorber 1 for absorbing solar energy;

The solar reformer 3 is connected to the hot tank 2 and the solar heat absorber 1 in turn, and a reducing substance is arranged in the solar reformer 3; and the solar reformer 3 is connected with the combustion chamber 8;

The heat exchanger 4 is provided with a reaction cavity and a heat exchange cavity. One end of the reaction cavity is connected to the solar reformer 3, and the other end is connected to the cold tank 5 and the particle circulation device 6 in turn; both ends of the heat exchange cavity are connected. are respectively connected with the air compressor 7 and the combustion chamber 8;

Two ends of the particle circulation device 6 are respectively connected to the cold tank 5 and the solar heat absorber 1 .

The working mode of the gas turbine system in this embodiment will be described below with reference to specific examples of heat storage and heat release methods.

The solar heat absorber 1 is provided with heat storage particles, and the heat storage particles in this embodiment are high-valence metal oxide cobalt tetroxide (Co ₃ O ₄ ) particles as an example. When the Co ₃ O ₄ particles are heated to 900℃-1000℃ under the action of the concentrated solar energy absorbed by the solar heat absorber 1, a reduction reaction occurs, absorbs heat energy, releases oxygen, and generates low-valence CoO, as shown in the reaction equation (1). The low-valence CoO enters the thermal tank 2 for temporary storage, converting solar thermal energy into chemical energy for storage.

2Co ₃ O ₄ →6CoO+O ₂ (1)

The low-valence CoO particles enter the solar reformer 3, and undergo a reformation reaction with the reducing substance methane (CH ₄ ) in the solar reformer 3 under the heating of solar energy to generate metal elemental Co and contain carbon monoxide (CO) and The synthesis gas of hydrogen ( _H2 ), as shown in equation (2), continues to convert solar thermal energy into chemical energy for storage.

CoO+CH ₄ →Co+CO+2H ₂ (2)

The above equations (1) and (2) represent the heat storage process. The energy input in the solar gas turbine system includes chemical energy and solar energy, and the proportion of solar energy can be as high as 80% or more.

The generated metal element Co enters the reaction chamber of the heat exchanger 4 from the solar reformer 3, and undergoes an oxidation reaction with oxygen in the air to generate a high-valence metal oxide Co ₃ O ₄ and release a large amount of thermal energy (800 ℃-900 ℃). °C), as shown in the reaction equation (3).

3Co+2O ₂ →Co ₃ O ₄ (3)

The above equation (3) represents an exothermic process.

The released thermal energy preheats the air sent from the air compressor 7 into the heat exchange chamber of the heat exchanger 4, and the preheated air enters the combustion chamber 8, and undergoes a combustion reaction with the syngas generated in the solar reformer 3, High-temperature gas (greater than 1200° C.) is generated, and the high-temperature gas enters the engine power generation device 9 to make the engine power generation device 9 generate electricity. The generated high-valence metal oxide Co ₃ O ₄ comes out of the reaction chamber of the heat exchanger 4 , enters the cold tank 5 for temporary storage, and is re-transmitted to the solar heat absorber 1 through the particle circulation device 6 to complete the particle cycle.

To sum up, the above-mentioned heat storage and heat release process performed by the solar gas turbine system of this embodiment includes the following steps:

The first-stage heat storage step: reacting the heat storage particles containing high-valence metal oxide particles at a high temperature in the solar heat absorber 1, wherein the high-valence metal oxide particles are converted into low-valence metal oxide particles, store thermal energy;

The second heat storage step: the heat storage particles enter the solar reformer 3 from the solar heat absorber 1, and undergo a reduction reaction with the reducing substances located in the solar reformer 3; wherein, the low-valence metal oxide particles are converted into For metal elemental particles, further store thermal energy;

Heat release step: make the heat storage particles enter the reaction chamber of the heat exchanger 4 from the solar reformer 3, the heat storage particles and the air undergo oxidation reaction to generate high-valence metal oxide particles, and release heat to preheat and send them from the air compressor 7 The air in the heat exchange chamber, the preheated air enters the combustion chamber and participates in the combustion;

Particle circulation step: the heat storage particles enter the particle circulation device 6 from the reaction chamber of the heat exchanger 4 and are circulated to the solar heat absorber 1 .

It should be noted that, in the above embodiment, the concentrated sunlight in the solar heat absorber 1 and the solar reformer 3 is determined by a tower concentrating system, a dish concentrating system, a trough concentrating system or a linear Fresnel system. One or more of the light concentrating systems are provided. The high-valence metal oxide may be one or more of high-valence oxides of iron, manganese, cobalt, copper, barium, antimony, chromium, tin, and cadmium. The reducing substances can be one or more of coal, oil, natural gas, biomass, or derivatives thereof. Those skilled in the art can make selections as required, which does not constitute a limitation on the technical solutions of the present invention.

In the above embodiment, the power generation device 9 includes a turbine (gas turbine) and a generator. The high-temperature gas generated by combustion in the combustion chamber 8 is a high-temperature and high-pressure gas, and then enters the turbine (gas turbine) to expand and perform work to drive the turbine. (Gas turbine) drives the generator as the external load rotor to rotate together at high speed, realizing the partial conversion of the chemical energy of the fuel into mechanical work, and outputting electrical work through the generator.

Compared with the prior art, the gas turbine system of the present invention realizes that the external heat sources such as solar energy are stably stored in the form of chemical energy by means of complementary energy storage of metal oxides and reducing substances; , thereby eliminating the fluctuation of solar energy, while increasing the proportion of solar energy and reducing the consumption of fossil fuels. And the system has the characteristics of high system efficiency, compact size and low cost.

Embodiment 2:

The second embodiment of the present invention provides a solar gas turbine system. The second embodiment is a further improvement of the first embodiment. The main improvement is that it further includes:

The hydrogen production reactor 12 is connected and arranged between the solar reformer 3 and the heat exchanger 4. The hydrogen production reactor 12 is provided with a water vapor inlet for introducing water vapor; the hydrogen production reactor 12 and the combustion chamber 8 connection; the heat storage particles enter the hydrogen production reactor 12 from the solar reformer 3, wherein the metal element particles react with water vapor to generate low-valence metal oxide particles and hydrogen, and the hydrogen enters the combustion chamber 8 to participate in combustion; the heat storage particles from The hydrogen production reactor 12 enters the reaction chamber of the heat exchanger.

The steam generator 10 and the water pump 11. The steam generator 10 is provided with a tail gas channel and a water vapor channel. The tail gas channel is connected to the power generation device 9. One end of the water vapor channel is connected to the power generation device 9, and the other end is connected to the water of the hydrogen production reactor 12. Steam inlet; the exhaust gas generated by the power generation device 9 is discharged through the exhaust gas channel, the feed water of the water pump 11 is heated and evaporated by the exhaust gas, and the generated steam enters the hydrogen production reactor 12 through the steam inlet.

The working mode of the gas turbine system of this embodiment will be described below with reference to specific examples of heat storage and heat release methods. Among them, cobalt tetroxide (Co ₃ O ₄ ) is still used as an example for the high-valence metal oxide, and methane (CH ₄ ) is still used as an example for the reducing substance.

The heat storage process is the same as in the first embodiment, in brief, as shown in equations (1) and (2), the heat storage particles containing high-valence metal oxide Co3O4 particles react at high temperature in the solar heat sink 1 , Co3O4 particles are converted into low-valence CoO particles to store thermal energy; the heat storage particles enter the solar reformer 3 from the solar heat absorber 1, and undergo a reduction reaction with the reducing substance CH4 located in the solar reformer 3; CoO particles are converted For Co elemental particles, further heat energy is stored. The solar energy can account for more than 80% of the input energy in the gas turbine system.

The main difference from the first embodiment is the exothermic process: when the heat storage process is completed, the elemental metal Co and water vapor (H2O) enter the hydrogen production reactor 12 to generate low-valence CoO and H2, as shown in equation (4) shown. The generated CoO then enters the heat exchanger 4, and further reacts with the oxygen in the air to generate high-valence metal oxide Co3O4 particles, while releasing a lot of heat (800℃-900℃), as shown in the reaction equation (5), preheating Compressed air from air compressor 7.

Co+H ₂ O→CoO+H ₂ (4)

6CoO+O ₂ →2Co ₃ O ₄ (5)

The preheated air enters the combustion chamber 8 and undergoes combustion reaction with the syngas generated in the solar reformer 3 and the H ₂ generated in the hydrogen production reactor 12 to generate high temperature gas (greater than 1200°C). The high temperature gas enters the power generation device 9 for power generation. The exhaust gas generated by the power generation device 9 is discharged through the exhaust gas channel, the feed water of the water pump 11 is heated and evaporated by the exhaust gas, and the generated steam enters the hydrogen production reactor 12 through the steam inlet and reacts with the elemental metal. The high-valence metal oxide Co3O4 particles from the heat exchanger 4 enter the cold tank 5 for temporary storage, and then re-enter the solar heat absorber 1 through the particle circulation device 6 to complete the particle cycle.

During the exothermic process performed by the gas turbine system of this embodiment, the heat storage particles enter the hydrogen production reactor 12 from the solar reformer 3 , and the elemental metal particles Co react with water vapor to form low-valence metal oxide CoO particles. and hydrogen, the hydrogen enters the combustion chamber 8 and participates in the combustion; the heat storage particles enter the reaction chamber of the heat exchanger 4 from the hydrogen production reactor 12, and the heat storage particles undergo oxidation reaction with air to form high-valence metal oxide particles, which release heat to preheat from The air compressor 7 feeds the air into the heat exchange chamber, and the preheated air enters the combustion chamber and participates in the combustion. In addition, in the gas turbine system of this embodiment, the steam generator 11 is used to recover the waste heat of the exhaust gas discharged from the power generation device 9, which improves the thermal power conversion efficiency of the system, and the efficiency can reach more than 45%.

Embodiment three:

The third embodiment of the present invention provides a solar gas turbine system. The third embodiment is an improvement of the first embodiment or the second embodiment. The main improvement lies in that the reaction chamber and the heat exchange chamber in the heat exchanger 4 The air fed into the heat exchange chamber by the air compressor 7 participates in the oxidation reaction between the heat storage particles and the air in the reaction chamber.

In this embodiment, the reaction chamber and the heat exchange chamber share the same chamber, and the air of the air compressor 7 participates in the oxidation reaction between the heat storage particles and the air in the reaction chamber, that is, direct heat exchange is realized, so that the Gas turbine systems are more compact and operate more efficiently.

Embodiment four:

The fourth embodiment of the present invention provides a solar gas turbine system. The fourth embodiment is a further improvement of any one of the first to third embodiments. The main improvement lies in that the solar heat absorber 1, the solar energy regenerator There are slopes in the reaction chambers of the complete device 3 and the heat exchanger 4, and the solar heat absorber 1, the solar reformer 3 and the heat exchanger 4 are arranged in sequence from high to low, and the heat storage particles are under the action of gravity. It moves from a high place to a low place in the gas turbine system, and returns to a high place under the conveyance of the particle circulation device; the particle circulation device is a screw conveyor.

In this embodiment, a preferred solution is proposed for the driving manner of the heat storage particles flowing and running in the gas turbine system. It is worth noting that, what is described in this embodiment is only a feasible way to drive the heat storage particles to flow and operate in the gas turbine system, that is, a flow operation method driven by gravity. Besides, other methods can be selected to drive the flow of the energy storage particles in the system, such as and not limited to gas-based driving methods, mechanical force-based driving methods, and the like. In addition, in addition to the screw conveyor, the particle circulating device in this embodiment can also select other devices that can realize the function of circulating heat-storing particles, such as but not limited to a bucket conveyor and the like.

It can be understood by those skilled in the art that, in the above-mentioned embodiments, many technical details are provided for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the above-mentioned embodiments, the technical solutions claimed in the claims of the present application can basically be realized. Various changes may be made to the above-described embodiments without departing from the spirit and scope of the present invention.

Claims (10)

1. A gas turbine system, comprising:

the combustion chamber is used for generating high-temperature fuel gas, and the generated high-temperature fuel gas enters the power generation device and is used for generating power;

characterized in that the gas turbine system further comprises:

a particle circulation device and an air compressor;

the solar heat absorber is used for absorbing solar energy;

the solar reformer is connected with the solar heat absorber, and a reducing substance is arranged in the solar reformer;

the heat exchanger is internally provided with a reaction cavity and a heat exchange cavity, two ends of the reaction cavity are respectively connected with the solar reformer and the particle circulating device, and two ends of the heat exchange cavity are respectively connected with the air compressor and the combustion chamber;

two ends of the particle circulating device are respectively connected with the reaction cavity and the solar heat absorber;

a plurality of heat storage particles are arranged in the solar heat absorber, and the heat storage particles comprise high-valence metal oxide particles, wherein the high-valence metal oxide particles react under the action of solar energy absorbed by the solar heat absorber to be converted into low-valence metal oxide particles to store heat energy;

the heat storage particles enter the solar reformer from the solar heat absorber and undergo a reduction reaction with the reducing substance, wherein the low-valence metal oxide particles are converted into metal simple substance particles to further store heat energy;

the heat storage particles enter a reaction cavity of the heat exchanger from the solar reformer, at least part or all of the heat storage particles and air are subjected to oxidation reaction to generate high-valence metal oxide particles, heat is released to preheat the air sent into the heat exchange cavity from the air compressor, and the preheated air enters the combustion chamber to participate in combustion;

the heat storage particles enter the particle circulating device from the reaction cavity of the heat exchanger and are conveyed to the solar heat absorber.

2. The gas turbine system of claim 1, wherein: the reaction cavity is communicated with the heat exchange cavity, and air sent into the heat exchange cavity by the air compressor participates in the oxidation reaction of the heat storage particles and the air in the reaction cavity.

3. The gas turbine system of claim 1, wherein: the gas turbine system further includes:

a heat tank connected between the solar heat absorber and the solar reformer;

a cold tank connected between the heat exchanger and the particle circulation device;

the hot tank and the cold tank are both used for temporarily storing the heat storage particles.

4. The gas turbine system of claim 1, wherein: the reducing substance is a substance containing carbon and/or hydrogen;

the solar reformer is connected with the combustion chamber;

when the heat storage particles enter the solar reformer from the solar heat absorber, the low-valence metal oxide particles and the reducing substances are subjected to a reduction reaction and converted into metal simple substance particles, and carbon monoxide and/or hydrogen are generated at the same time, and the carbon monoxide and/or hydrogen are sent into the combustion chamber to participate in a combustion reaction.

5. The gas turbine system according to any one of claims 1 to 4, wherein: the gas turbine system further includes:

the hydrogen production reactor is connected and arranged between the solar reformer and the heat exchanger, and a steam inlet is formed in the hydrogen production reactor and used for introducing steam;

the hydrogen production reactor is connected with the combustion chamber;

the heat storage particles enter the hydrogen production reactor from the solar reformer, wherein metal simple substance particles react with steam to generate low-valence metal oxide particles and hydrogen, and the hydrogen enters a combustion chamber to participate in combustion;

and the heat storage particles enter the reaction cavity of the heat exchanger from the hydrogen production reactor.

6. The gas turbine system of claim 5, wherein: the gas turbine system further includes:

the steam generator is internally provided with a tail gas channel and a water vapor channel, the tail gas channel is connected with the power generation device, one end of the water vapor channel is connected with the power generation device, and the other end of the water vapor channel is connected with a water vapor inlet of the hydrogen production reactor;

and tail gas generated by the power generation device is discharged through the tail gas channel, the water supply of the water pump is heated and evaporated by the tail gas, and the generated steam enters the hydrogen production reactor through the steam inlet.

7. A method of storing and releasing heat for a gas turbine system comprising the steps of:

a first-stage heat storage step: reacting the heat storage particles containing the high-valence metal oxide particles at a high temperature in the solar heat absorber, wherein the high-valence metal oxide particles are converted into low-valence metal oxide particles to store heat energy;

a second-stage heat storage step: enabling the heat storage particles to enter a solar reformer from a solar heat absorber and to perform a reduction reaction with a reducing substance in the solar reformer; wherein, the low valence metal oxide particles are converted into metal simple substance particles, and the heat energy is further stored;

and (3) heat release step: the heat storage particles enter a reaction cavity of a heat exchanger from the solar reformer, at least part or all of the heat storage particles and air are subjected to oxidation reaction to generate high-valence metal oxide particles, heat is released to preheat the air sent into the heat exchange cavity from an air compressor, and the preheated air enters a combustion chamber to participate in combustion;

and (3) particle circulation step: the heat storage particles enter the particle circulating device from the reaction cavity of the heat exchanger and are circulated to the solar heat absorber.

8. The method of storing and discharging heat for a gas turbine system of claim 7, further comprising, between said first stage heat storage step and said second stage heat storage step, the steps of:

the heat storage particles enter a hot tank for temporary storage;

between the second stage heat storage step and the heat release step, the method further comprises the following steps:

the heat storage particles enter the cold tank for temporary storage.

9. The method for storing and releasing heat in a gas turbine system according to claim 7, wherein in the second stage heat storage step, the reducing substance is a substance containing carbon and/or hydrogen;

when the heat storage particles enter the solar reformer from the solar heat absorber, the low-valence metal oxide particles and the reducing substances are subjected to a reduction reaction and are converted into metal simple substance particles, and carbon monoxide and/or hydrogen are generated at the same time, and the carbon monoxide and/or the hydrogen are sent into the combustion chamber to participate in a combustion reaction.

10. The method of storing and discharging heat for a gas turbine system of claim 7, further comprising, between said second stage storing heat and said discharging heat, the steps of:

the heat storage particles enter a hydrogen production reactor from the solar reformer, metal elementary substance particles in the heat storage particles react with steam to generate low-valence metal oxide particles and hydrogen, and the hydrogen enters a combustion chamber to participate in combustion;

and the heat storage particles enter the reaction cavity of the heat exchanger from the hydrogen production reactor.

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