Gas turbine turbine blade cooling system and method utilizing steam reforming reaction

Abstract

The present invention discloses a gas turbine turbine blade cooling system and method using steam reforming reaction and a gas turbine, the system comprising: a cooling channel of the turbine blade, a fuel regenerator, a water regenerator and a mixing regenerator; the feed port of the mixing regenerator is respectively connected to the fuel outlet of the fuel regenerator and the water outlet of the water regenerator; the discharge port of the mixing regenerator is connected to the inlet of the cooling channel of the turbine blade; the inner wall of the cooling channel of the turbine blade is coated with a steam reforming catalyst; the fuel regenerator is used to heat and gasify hydrocarbon fuel to obtain hydrocarbon fuel in gas phase state, and pass it into the mixing regenerator; the water regenerator is used to gasify water to obtain water vapor, and pass it into the mixing regenerator; the mixing regenerator is used to mix and heat the hydrocarbon fuel in gas phase state and water vapor, and then pass it into the cooling channel of the turbine blade. The hydrocarbon fuel is used to react and absorb heat in the cooling channel of the turbine blade to improve the cooling effect of the turbine blade.

Description

Technical Field

[0001] The invention relates to a gas turbine turbine blade cooling system and method utilizing steam reforming reaction and a gas turbine. Background Art

[0002] A gas turbine is an internal combustion power machine that uses a continuously flowing gas as a working medium to drive the impeller to rotate at high speed, converting the energy of the fuel into useful work. Gas turbines are widely used due to their light weight and small size.

[0003] The working process of a gas turbine is that the compressor continuously inhales air from the atmosphere and compresses it; the compressed air enters the combustion chamber, mixes with the injected fuel and burns to become high-temperature gas, which then flows into the gas turbine to expand and do work, driving the turbine impeller to rotate with the compressor impeller; the work capacity of the heated high-temperature fuel gas is significantly improved, so while the gas turbine drives the compressor, there is still surplus work as the output mechanical work of the gas turbine. When the gas turbine is started from a standstill, it needs to be rotated by a starter, and the starter is not disengaged until it is accelerated to be able to run independently.

[0004] During the operation of the gas turbine, the combustion chamber and turbine not only have high operating temperatures, but also withstand thermal shock caused by drastic temperature changes during startup and shutdown. Therefore, harsh working conditions seriously affect the service life of the gas turbine, and the turbine blades are the key components that determine the life of the gas turbine. In addition, the future development trend of gas turbines is to improve efficiency, and the key to improving efficiency is to increase the initial temperature of the gas, that is, to increase the turbine inlet temperature. However, excessively high gas temperature will further deteriorate the working environment of the turbine blades of the gas turbine, resulting in a short service life and poor stability. In order to improve the service life and stability of the turbine blades, it is necessary to cool the turbine blades. At present, the turbine blade cooling technology mainly uses cooling air as a cooling medium for internal heat exchange of the turbine blades, that is, cooling air is introduced into the cooling channel of the turbine blades and heat is absorbed from the outside of the blades to reduce the temperature of the turbine blades. However, as the turbine inlet temperature continues to rise, the air cooling capacity reaches the upper limit and can no longer meet the cooling needs of the turbine blades. Therefore, improving the cooling technology of turbine blades and developing more efficient and reliable cooling methods are technical problems that need to be solved urgently. Summary of the invention

[0005] In view of the technical defects and technical drawbacks existing in the prior art, the embodiments of the present invention provide a gas turbine turbine blade cooling system and method and a gas turbine utilizing steam reforming reaction to overcome the above problems or at least partially solve the above problems.

[0006] As one aspect of an embodiment of the present invention, it relates to a gas turbine turbine blade cooling system using a steam reforming reaction, comprising: a cooling channel of the turbine blade, a fuel regenerator, a water regenerator and a mixing regenerator;

[0007] The feed inlet of the mixing regenerator is respectively connected to the fuel outlet of the fuel regenerator and the water outlet of the water regenerator;

[0008] The discharge port of the mixing regenerator is connected to the inlet of the cooling channel of the turbine blade;

[0009] The inner wall of the cooling channel of the turbine blade is coated with a steam reforming catalyst;

[0010] The fuel regenerator is used to heat and gasify the hydrocarbon fuel to obtain hydrocarbon fuel in gas phase, and pass the gas into the mixing regenerator;

[0011] The water regenerator is used to gasify water to obtain water vapor, and pass it into the mixing regenerator;

[0012] The mixing regenerator is used to mix and heat the hydrocarbon fuel in the gas phase and water vapor, and then pass them into the cooling channel of the turbine blade.

[0013] In one embodiment, the fuel regenerator comprises a first heat exchange channel, the heat inlet of the first heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and completing work in the turbine into the first heat exchange channel;

[0014] The water regenerator comprises a second heat exchange channel, the heat inlet of the second heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and having completed work in the turbine into the second heat exchange channel;

[0015] The mixing regenerator includes a third heat exchange channel, a heat inlet of the third heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and that has completed work in the turbine into the third heat exchange channel, and / or, the heat inlet of the third heat exchange channel is connected to at least one of the heat outlets of the first heat exchange channel and the second heat exchange channel, and is used to pass the high-temperature exhaust gas discharged from the heat outlets of the first heat exchange channel and / or the second heat exchange channel into the third heat exchange channel.

[0016] In one embodiment, the outlet of the cooling channel of the turbine blade is connected to the inlet of the combustion chamber of the gas turbine, so as to pass the hydrocarbon fuel in the gas phase produced in the cooling channel into the combustion chamber of the gas turbine for combustion.

[0017] In one embodiment, the cooling channel of the turbine blade is a U-shaped structure.

[0018] As a second aspect of an embodiment of the present invention, a method for cooling a gas turbine blade using a steam reforming reaction is provided, comprising:

[0019] Gasifying hydrocarbon fuel and water respectively to obtain hydrocarbon fuel and water vapor in gas phase, and mixing the hydrocarbon fuel and water vapor in gas phase;

[0020] Passing the mixed hydrocarbon fuel and water vapor in a gas phase into the cooling passage of the turbine blade of the gas turbine;

[0021] The hydrocarbon fuel and water vapor in the gas phase undergo a catalytic reforming reaction under the action of the steam reforming catalyst coated on the inner wall of the cooling channel of the turbine blade.

[0022] In one embodiment, the hydrocarbon fuel includes gasoline, diesel, kerosene and natural gas.

[0023] In one embodiment, the ratio of the mixed hydrocarbon fuel in gas phase to water vapor is 8.5:1.5 to 9:1.

[0024] In one embodiment, the method further comprises:

[0025] The hydrocarbon fuel in gas phase is subjected to cracking reaction in the cooling passage of the turbine blade;

[0026] Carbon coke and water vapor generated in the cooling passage of the turbine blade undergo a water-gas reaction.

[0027] In one embodiment, the method further comprises:

[0028] The hydrocarbon fuel in gas phase produced in the cooling channel is introduced into the combustion chamber of the gas turbine for combustion.

[0029] As a third aspect of an embodiment of the present invention, it relates to a gas turbine, comprising: a turbine, a fuel regenerator, a water regenerator, a mixing regenerator, a compressor and a combustion chamber; the combustion chamber is respectively connected to the compressor and the turbine;

[0030] The turbine blades of the turbine are provided with cooling channels, and the inner wall of the cooling channels is coated with a steam reforming catalyst;

[0031] The feed inlet of the mixing regenerator is respectively connected to the fuel outlet of the fuel regenerator and the water outlet of the water regenerator;

[0032] The discharge port of the mixing regenerator is connected to the inlet of the cooling channel of the turbine blade;

[0033] The fuel regenerator is used to heat and gasify the hydrocarbon fuel to obtain hydrocarbon fuel in gas phase, and pass the gas into the mixing regenerator;

[0034] The water regenerator is used to gasify water to obtain water vapor, and pass it into the mixing regenerator;

[0035] The mixing regenerator is used to mix and heat the hydrocarbon fuel in gas phase and water vapor before passing them into the cooling channel of the turbine blade.

[0036] The embodiments of the present invention achieve at least the following technical effects:

[0037] The gas turbine turbine blade cooling system and method and the gas turbine using the steam reforming reaction provided by the embodiment of the present invention use the fuel of the gas turbine as a coolant to cool the turbine blade of the gas turbine. The mixed gas phase fuel and water vapor are subjected to a catalytic reforming reaction in the cooling channel of the turbine blade under the action of the steam reforming catalyst to generate hydrogen and carbon monoxide. This reaction can absorb a large amount of heat on the surface of the turbine blade, play a cooling role, improve the cooling effect of the turbine blade, extend the service life of the turbine blade, and enhance the stability of the turbine blade. In addition, during the endothermic reaction process, the water vapor can react with the additional product carbon coking to react with water gas, effectively preventing the blockage of the cooling channel caused by carbon deposition, thereby ensuring the smooth flow of the cooling channel of the turbine blade. At the same time, during the catalytic reforming reaction process, the cracking reaction of the macromolecular substance of the fuel occurs, generating hydrogen and carbon monoxide. The cracking reaction is also an endothermic reaction. During the cracking reaction process, a large amount of heat on the surface of the turbine blade can also be absorbed, playing a role in cooling the turbine blade.

[0038] The gas turbine turbine blade cooling system utilizing steam reforming reaction provided by the embodiment of the present invention is capable of transporting hydrogen and carbon monoxide generated during catalytic reforming reaction and cracking reaction to the combustion chamber through the outlet of the cooling channel of the turbine blade for combustion, and the absorbed heat can be released again. By recycling the fuel, the utilization efficiency of the fuel is improved and energy waste is avoided.

[0039] The gas turbine turbine blade cooling system utilizing steam reforming reaction provided in an embodiment of the present invention heats the hydrocarbon fuel and water entering the system by passing the high-temperature gas discharged from the turbine outlet into the heat exchange channels of each heater, thereby recycling the heat, improving energy utilization and reducing production costs.

[0040] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structure described in the written description, claims, and drawings.

[0041] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 It is a schematic structural diagram of a gas turbine blade cooling system utilizing steam reforming reaction according to the present invention.

[0044] Figure 2 It is a schematic diagram of the distribution of cooling channels and the flow direction of mixed gas in the turbine blade of the present invention.

[0045] Figure 3 It is a schematic diagram of the longitudinal half-section structure of the turbine blade of the present invention.

[0046] Figure 4 for Figure 3 The cross-sectional structure schematic diagram of the turbine blade in the AA direction is shown. DETAILED DESCRIPTION

[0047] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0049] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The following is a detailed description of a gas turbine turbine blade cooling system and method using a steam reforming reaction and various specific implementations of a gas turbine provided by an embodiment of the present invention.

[0052] Embodiment 1:

[0053] Reference Figures 1 to 4 As shown, a gas turbine turbine blade cooling system using steam reforming reaction is provided in Embodiment 1 of the present invention, comprising: a cooling channel 1011 of a turbine blade 101 of a turbine 1, a fuel regenerator 2, a water regenerator 3 and a mixing regenerator 4;

[0054] The feed inlet of the mixing regenerator 4 is connected to the fuel outlet of the fuel regenerator 2 and the water outlet of the water regenerator 3 respectively;

[0055] The discharge port of the mixing regenerator 4 is connected to the inlet of the cooling channel 1011 of the turbine blade 101;

[0056] The inner wall of the cooling channel 1011 of the turbine blade 101 is coated with a steam reforming catalyst.

[0057] In a specific embodiment, referring to Figure 1 As shown, the fuel regenerator includes a fuel inlet for introducing hydrocarbon fuel, the combustion heater 2 heats the hydrocarbon fuel introduced through the fuel inlet, vaporizes it to obtain hydrocarbon fuel in gaseous state, and the hydrocarbon fuel in gaseous state enters the mixing regenerator 4 through the fuel outlet of the fuel regenerator 2; the water regenerator includes a water inlet for introducing water, the water regenerator 3 heats the water introduced through the water inlet, vaporizes it to obtain water vapor, and the water vapor enters the mixing regenerator 4 through the water outlet of the water regenerator 3; the hydrocarbon fuel in gaseous state and water vapor introduced through the feed inlet of the mixing regenerator are mixed in the mixing regenerator 4, and the mixed hydrocarbon fuel in gaseous state and water vapor are introduced into the cooling channel 1011 of the turbine blade 101 through the discharge port of the mixing regenerator 4.

[0058] In the embodiment of the present invention, the steam reforming catalyst may be a non-precious metal catalyst whose metal component is nickel or cobalt and whose carrier is alumina, or a precious metal catalyst supported by a platinum metal catalyst or a zirconium metal catalyst. In the embodiment of the present invention, the type of the steam reforming catalyst is not limited, as long as it can realize the catalytic reforming reaction of hydrocarbon fuel and water vapor and does not affect the endothermic effect during the reaction process, and those skilled in the art may select it according to the prior art in the art.

[0059] The gas turbine turbine blade cooling system using steam reforming reaction provided by the embodiment of the present invention can use the fuel of the gas turbine as a coolant to cool the turbine blade of the gas turbine. By making the mixed gas phase fuel and water vapor undergo catalytic reforming reaction in the cooling channel of the turbine blade under the action of the steam reforming catalyst, hydrogen and carbon monoxide are generated. This reaction can absorb a large amount of heat from the surface of the turbine blade, play a cooling role, improve the cooling effect of the turbine blade, extend the service life of the turbine blade, and enhance the stability of the turbine blade. In addition, during the endothermic reaction process, water vapor can react with the additional product carbon coking to react with water gas, effectively preventing the blockage of the cooling channel caused by carbon deposition, thereby ensuring the smooth flow of the cooling channel of the turbine blade. At the same time, during the catalytic reforming reaction process, the cracking reaction of the macromolecular substance of the fuel occurs, generating hydrogen and carbon monoxide. The cracking reaction is also an endothermic reaction. During the cracking reaction process, a large amount of heat from the surface of the turbine blade can also be absorbed, playing a role in cooling the turbine blade.

[0060] The ratio of the hydrocarbon fuel in the gas phase and water vapor mixed in the mixing regenerator 4 can be set according to the cooling requirements of the turbine blades. In the embodiment of the present invention, the ratio of the hydrocarbon fuel in the gas phase and water vapor mixed in the mixing regenerator 4 can be 8.5:1.5 to 9:1.

[0061] In a preferred embodiment, the preferred ratio of the mixed hydrocarbon fuel in gas phase and water vapor is 8.5:1.5. With this preferred ratio, the catalytic reforming reaction efficiency of the hydrocarbon fuel in gas phase and water vapor in the cooling channel 1011 of the turbine blade 101 is higher, the heat absorption effect is better, and the reaction is more complete, which can improve the utilization rate of the hydrocarbon fuel.

[0062] In the cooling channel 1011 of the turbine blade 101, under the action of the steam reforming catalyst applied on the wall of the cooling channel 1011, the hydrocarbon fuel in the gas phase and the water vapor undergo a catalytic reforming reaction to produce H2 and CO; because the hydrocarbon fuel in the gas phase contains macromolecular substances, the hydrocarbon fuel in the gas phase undergoes a cracking reaction while the catalytic reforming reaction. Since additional products: carbon coke are generated during the catalytic reforming reaction and the cracking reaction, and the cooling channel 1011 of the turbine blade 101 contains a large amount of water vapor, the water vapor and the carbon coke react with water gas in the cooling channel 1011 of the turbine blade 101. Through the water gas reaction, the accumulation of carbon coke generated during the steam reforming reaction and the cracking reaction is prevented, the blockage of the cooling channel 1011 of the turbine blade 101 is prevented, and the unblocking of the cooling channel 1011 of the turbine blade 101 is ensured.

[0063] The gas turbine turbine blade cooling system utilizing steam reforming reaction provided by the embodiment of the present invention is capable of transporting hydrogen and carbon monoxide generated during the catalytic reforming reaction and the cracking reaction to the combustion chamber 6 for combustion through the outlet of the cooling channel 1011 of the turbine blade 101, and the absorbed heat can be released again. By recycling the fuel, the fuel utilization efficiency is improved and energy waste is avoided.

[0064] In a specific embodiment, referring to Figures 2 to 4 As shown, the cooling channel 1011 of the turbine blade 101 is a U-shaped structure, which adopts a U-shaped channel method, and a steam reforming catalyst is evenly applied on the inner wall of the U-shaped channel, so that when the mixed hydrocarbon fuel and water vapor in the gas phase flow inside the turbine blade, the contact area and contact time with the steam reforming catalyst are increased, the catalytic reforming reaction is more complete, the fuel utilization rate is improved, and the heat on the outside of the turbine blade is better absorbed. At the same time, it is ensured that the heat absorption of the turbine blade 101 is uniform, avoiding the situation where one side of the turbine blade 101 is cooled while the other side is hot.

[0065] In a specific embodiment, the outlet of the cooling channel 1011 of the turbine blade 101 is connected to the inlet of the combustion chamber 6 of the gas turbine, so as to pass the hydrocarbon fuel in the gas phase generated in the cooling channel 1011 of the turbine blade 101 into the combustion chamber 6 of the gas turbine for combustion. In the embodiment of the present invention, by connecting the outlet of the cooling channel 1011 of the turbine blade 101 to the inlet of the combustion chamber of the gas turbine, the reaction products generated in the cooling channel 1011 of the turbine blade 101, including hydrogen and carbon monoxide gas, are burned again in the combustion chamber, releasing heat to drive the gas turbine to work, so that the hydrocarbon fuel is fully utilized, the heat is recycled, the utilization rate of the hydrocarbon fuel applied to the gas turbine is improved, the waste of energy is avoided, and the production cost is reduced.

[0066] In the above-mentioned gas turbine turbine blade cooling system using steam reforming reaction provided by the embodiment of the present invention, the above-mentioned fuel regenerator 2 includes a first heat exchange channel 201, and the heat inlet of the first heat exchange channel 201 is connected to the exhaust port of the gas turbine, which is used to pass the high-temperature exhaust gas discharged from the exhaust port that has completed work in the turbine into the first heat exchange channel 201;

[0067] The water regenerator 3 comprises a second heat exchange channel 301, the heat inlet of the second heat exchange channel 301 is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and having completed work in the turbine into the second heat exchange channel 301;

[0068] The mixing regenerator 4 includes a third heat exchange channel 401, the heat inlet of the third heat exchange channel 401 is connected to the heat outlets of the first heat exchange channel 201 and the second heat exchange channel 301, and is used to pass the high-temperature exhaust gas discharged from the heat outlets of the first heat exchange channel 201 and the second heat exchange channel 301 into the third heat exchange channel 401.

[0069] The high-temperature gas generated by combustion in the combustion chamber 6 still contains a large amount of heat energy after passing through the turbine to do work. By connecting the heat inlet of the first heat exchange channel 201 and the second heat exchange channel 301 to the exhaust port of the gas turbine, the energy of the high-temperature exhaust gas that has completed work in the turbine can be recovered and reused, and the hydrocarbon fuel and water are heated to obtain hydrocarbon fuel and water vapor in a gas phase. After being heated and mixed in the mixing regenerator 4, they are passed into the cooling channel 1011 of the turbine blade 101.

[0070] Of course, in the embodiment of the present invention, the heat inlet of the third heat exchange channel 401 can also be directly connected to the exhaust port of the gas turbine, so as to pass the high-temperature exhaust gas discharged from the exhaust port and completed work in the turbine into the third heat exchange channel 401, or the heat inlet of the third heat exchange channel 401 is only connected to one of the heat outlets of the first heat exchange channel 201 and the second heat exchange channel 301, so as to pass the high-temperature exhaust gas discharged from the heat outlet of the heat inlet of the third heat exchange channel 401 into the third heat exchange channel 401, or the heat inlet of the third heat exchange channel 401 is respectively connected to the heat outlets of the first heat exchange channel 201 and the second heat exchange channel 301 and the exhaust port of the gas turbine. As long as the purpose of heating and heat preservation of the hydrocarbon fuel and water vapor in the gas phase entering the mixing regenerator 4 can be met.

[0071] The first to third heat exchange channels in the embodiment of the present invention can be made of any material with good heat exchange function, as long as they can meet the heating and temperature increase requirements of fuel, water, and the hydrocarbon fuel and water vapor in the gas phase after mixing. In addition, the specific structural forms of the first to third heat exchange channels in the embodiment of the present invention can refer to the methods in the prior art, and are not specifically limited in the embodiment of the present invention.

[0072] As a specific implementation of the embodiment of the present invention, when the gas turbine is started, the starter first drives the gas turbine to drive the compressor 5 to work, the compressor 5 continuously inhales low-temperature air and compresses it, pumps the compressed air into the combustion chamber 6, and burns with hydrocarbon fuel, generating a large amount of high-temperature air to drive the turbine blades 101 of the turbine 1 to work, driving the impeller of the turbine 1 to rotate with the impeller of the compressor 5, and outputting mechanical energy. Subsequently, the high-temperature exhaust gas that has completed work in the turbine 1 is transported to the first heat exchange channel 201 of the fuel regenerator 2, the second heat exchange channel 301 of the water regenerator 3, and the third heat exchange channel 401 of the mixing regenerator 4 through the exhaust port of the gas turbine to heat the fuel and water, and finally discharged through the heat outlet of the third heat exchange channel 401, and discharged into the air after being processed by the air purification device. The hydrocarbon fuel and water introduced into the fuel regenerator 2 and the water regenerator 3 are heated and converted into hydrocarbon fuel and water vapor in gas phase, which are then mixed in the mixing regenerator 4. The hydrocarbon fuel and water vapor in gas phase mixed in the mixing regenerator are input into the cooling channel 1011 of the turbine blade 101 through the gas delivery pipeline.

[0073] Under the action of the catalyst evenly coated on the inner wall of the cooling channel 1011 of the turbine blade 101, the hydrocarbon fuel in the gas phase and the water vapor undergo a catalytic reforming reaction, and the simplified equation of the catalytic reforming reaction is: Fuel (hydrocarbon fuel) + H2O (g) → H2 (g) + CO (g). At the same time, the macromolecular substances in the hydrocarbon fuel in the gas phase undergo a cracking reaction, and the simplified equation of the cracking reaction is: Fuel (fuel) → H2 (g) + C. Both reaction processes absorb a large amount of heat, thereby reducing or avoiding the increase in the surface temperature of the turbine blade due to high-temperature gas, achieving the effect of cooling the turbine blade 1, and reducing the impact on the performance of the turbine blade. In addition, the water vapor in the cooling channel 1011 of the turbine blade 101 reacts with the carbon produced in the catalytic reforming reaction and the cracking reaction, and the simplified equation of the water gas reaction is: C (carbon coking) + H2O (g) → H2 (g) + CO (g). The water-gas reaction can prevent carbon coke from adhering to the cooling channel 1011 of the turbine blade 101 , thereby avoiding blockage of the cooling channel 1011 .

[0074] The hydrogen and carbon monoxide gases generated by the reaction in the cooling channel 1011 of the turbine blade 101 are passed into the combustion chamber 6 through the outlet of the cooling channel 1011 of the turbine blade 101 and burned, releasing the heat absorbed during the cooling process of the turbine blade 101, thereby improving the fuel utilization rate and energy utilization efficiency.

[0075] The gas turbine turbine blade cooling system using steam reforming reaction provided by the embodiment of the present invention can use hydrocarbon fuel as a coolant. In the cooling channel of the turbine blade, the hydrocarbon fuel in the gas phase and water vapor are subjected to a catalytic reforming reaction under the action of a steam reforming catalyst, thereby cooling the turbine blade. In addition, the hydrocarbon fuel in the gas phase produces a thermal cracking reaction at a temperature of about 800K, which cracks to generate small molecules and absorbs a large amount of heat during the cracking process, thereby achieving an excellent cooling effect. The hydrogen and carbon monoxide products generated by the reaction in the cooling channel of the turbine blade will enter the combustion chamber and burn, and the absorbed heat can be released again to drive the gas turbine to work. The gas turbine turbine blade cooling system using steam reforming reaction in the embodiment of the present invention utilizes the combustion and cooling properties of hydrocarbon fuels, not only achieving the cooling effect of the turbine blades, but also improving the fuel utilization efficiency and avoiding energy waste.

[0076] In the embodiment of the present invention, the hydrocarbon fuel introduced into the fuel heat exchanger 2 can be gasoline, diesel, kerosene and natural gas, or other types of hydrocarbon fuels, as long as the purpose of cooling the turbine blades of the present invention can be achieved. In this regard, there is no specific limitation in the embodiment of the present invention.

[0077] The gas turbine described in the embodiment of the present invention may be a ground gas turbine, a ship gas turbine, or an aircraft gas turbine. The gas turbine turbine blade cooling system using steam reforming reaction provided in the embodiment of the present invention may be applicable to turbine blade cooling of gas turbines in various application scenarios, and has a very wide range of applications, which is not specifically limited in the embodiment of the present invention.

[0078] Based on the same inventive concept, an embodiment of the present invention further provides a method for cooling a gas turbine blade using a steam reforming reaction, comprising:

[0079] Gasifying hydrocarbon fuel and water respectively to obtain hydrocarbon fuel and water vapor in gas phase, and mixing the hydrocarbon fuel and water vapor in gas phase;

[0080] Passing the mixed hydrocarbon fuel and water vapor in a gas phase into the cooling passage of the turbine blade of the gas turbine;

[0081] The hydrocarbon fuel and water vapor in the gas phase undergo a catalytic reforming reaction under the action of the steam reforming catalyst coated on the inner wall of the cooling channel of the turbine blade.

[0082] In the gas turbine turbine blade cooling method using steam reforming reaction provided by an embodiment of the present invention, hydrocarbon fuel in gas phase also undergoes cracking reaction in the cooling channel of the turbine blade; carbon coke and water vapor generated in the cooling channel of the turbine blade also undergo water gas reaction.

[0083] The gas turbine turbine blade cooling method using steam reforming reaction provided in an embodiment of the present invention further includes:

[0084] The hydrocarbon fuel in the gas phase produced in the suction cooling passage is introduced into the combustion chamber of the gas turbine.

[0085] The cooling method of gas turbine turbine blades using steam reforming reaction provided by the embodiment of the present invention can use hydrocarbon fuel as a coolant. In the cooling channel of the turbine blade, the hydrocarbon fuel in the gas phase and water vapor are subjected to a catalytic reforming reaction under the action of a steam reforming catalyst, thereby cooling the turbine blade. In addition, the hydrocarbon fuel in the gas phase produces a thermal cracking reaction at a temperature of about 800K, which cracks to generate small molecules and absorbs a large amount of heat during the cracking process, thereby achieving an excellent cooling effect. The hydrogen and carbon monoxide products generated by the reaction in the cooling channel of the turbine blade will enter the combustion chamber and burn, and the absorbed heat can be released again to drive the gas turbine to work. The cooling method of gas turbine turbine blades using steam reforming reaction in the embodiment of the present invention utilizes the combustion and cooling properties of hydrocarbon fuels, not only achieving the cooling effect of the turbine blades, but also improving the utilization efficiency of the fuel and avoiding energy waste.

[0086] Based on the same inventive concept, an embodiment of the present invention further provides a gas turbine, comprising: a turbine 1, a fuel regenerator 2, a water regenerator 3, a mixing regenerator 4, a compressor 5 and a combustion chamber 6; the combustion chamber 6 is respectively connected to the compressor 5 and the turbine 1;

[0087] The turbine blade 101 of the turbine 1 is provided with a cooling channel 1011, and the inner wall of the cooling channel 1011 of the turbine blade 101 is coated with a steam reforming catalyst;

[0088] The feed inlet of the mixing regenerator 4 is connected to the fuel outlet of the fuel regenerator 2 and the water outlet of the water regenerator 3 respectively;

[0089] The discharge port of the mixing regenerator 4 is connected to the inlet of the cooling channel 1011 of the turbine blade 101;

[0090] The fuel regenerator 2 is used to heat and gasify the hydrocarbon fuel to obtain hydrocarbon fuel in a gas phase, and then pass the hydrocarbon fuel into the mixing regenerator 4;

[0091] The water regenerator 3 is used to gasify water to obtain water vapor, and pass it into the mixed heat recovery, 4;

[0092] The mixing regenerator 4 is used to mix and heat the hydrocarbon fuel in the gas phase and water vapor, and then pass them into the cooling channel 1011 of the turbine blade 101 .

[0093] The specific implementation of the gas turbine provided in the embodiment of the present invention can refer to the detailed description of the gas turbine turbine blade cooling system and method using the steam reforming reaction mentioned above, which will not be repeated here.

[0094] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0095] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A gas turbine blade cooling system utilizing steam reforming reaction, It is characterized in that include: Cooling channels for turbine blades, fuel recuperators, water recuperators, and mixing recuperators; The feed inlet of the mixing regenerator is respectively connected to the fuel outlet of the fuel regenerator and the water outlet of the water regenerator; The discharge port of the mixing regenerator is connected to the inlet of the cooling channel of the turbine blade; The inner wall of the cooling channel of the turbine blade is coated with a steam reforming catalyst; The fuel regenerator is used to heat and gasify the hydrocarbon fuel to obtain hydrocarbon fuel in gas phase, and pass the gas into the mixing regenerator; The water regenerator is used to gasify water to obtain water vapor, and pass it into the mixing regenerator; The mixing regenerator is used to mix and heat the hydrocarbon fuel in gas phase and water vapor before passing them into the cooling channel of the turbine blades; The fuel regenerator comprises a first heat exchange channel, the heat inlet of the first heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and having completed work in the turbine into the first heat exchange channel; The water regenerator comprises a second heat exchange channel, the heat inlet of the second heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and having completed work in the turbine into the second heat exchange channel; The mixing regenerator comprises a third heat exchange channel, the heat inlet of the third heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and completed work in the turbine into the third heat exchange channel, and / or the heat inlet of the third heat exchange channel is connected to at least one of the heat outlets of the first heat exchange channel and the second heat exchange channel, and is used to pass the high-temperature exhaust gas discharged from the heat outlets of the first heat exchange channel and / or the second heat exchange channel into the third heat exchange channel; The outlet of the cooling channel of the turbine blade is connected to the inlet of the combustion chamber of the gas turbine, so as to pass the hydrocarbon fuel in the gas phase produced in the cooling channel into the combustion chamber of the gas turbine for combustion; The hydrocarbon fuels include gasoline, diesel, kerosene and natural gas; The ratio of the mixed hydrocarbon fuel in gas phase to water vapor is 8.5:1.5 to 9:

1.

2. The system according to claim 1, It is characterized in that The cooling channel of the turbine blade is a U-shaped structure.

3. A method for cooling a gas turbine blade using a steam reforming reaction, using the gas turbine blade cooling system using a steam reforming reaction according to claim 1 or 2, It is characterized in that include: Gasifying hydrocarbon fuel and water respectively to obtain hydrocarbon fuel and water vapor in gas phase, and mixing the hydrocarbon fuel and water vapor in gas phase; Passing the mixed hydrocarbon fuel and water vapor in gas phase into the cooling passage of the turbine blade; The hydrocarbon fuel and water vapor in the gas phase undergo a catalytic reforming reaction under the action of the steam reforming catalyst coated on the inner wall of the cooling channel of the turbine blade.

4. The method according to claim 3, It is characterized in that Also includes: The hydrocarbon fuel in gas phase is subjected to cracking reaction in the cooling passage of the turbine blade; Carbon coke and water vapor generated in the cooling passage of the turbine blade undergo a water-gas reaction.

5. The method according to claim 3 or 4, It is characterized in that Also includes: The hydrocarbon fuel in gas phase produced in the cooling channel is introduced into the combustion chamber of the gas turbine for combustion.

6. A gas turbine, It is characterized in that include: Turbine, fuel recuperator, water recuperator, mixing recuperator, compressor and combustor; The combustion chamber is connected to the compressor and the turbine respectively; The turbine blades of the turbine are provided with cooling channels, and the inner wall of the cooling channels is coated with a steam reforming catalyst; The feed inlet of the mixing regenerator is respectively connected to the fuel outlet of the fuel regenerator and the water outlet of the water regenerator; The discharge port of the mixing regenerator is connected to the inlet of the cooling channel of the turbine blade; The fuel regenerator is used to heat and gasify the hydrocarbon fuel to obtain hydrocarbon fuel in gas phase, and pass the gas into the mixing regenerator; The water regenerator is used to gasify water to obtain water vapor, and pass it into the mixing regenerator; The mixing regenerator is used to mix and heat the hydrocarbon fuel in gas phase and water vapor before passing them into the cooling channel of the turbine blades; The fuel regenerator comprises a first heat exchange channel, the heat inlet of the first heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and having completed work in the turbine into the first heat exchange channel; The water regenerator comprises a second heat exchange channel, the heat inlet of the second heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and having completed work in the turbine into the second heat exchange channel; The mixing regenerator comprises a third heat exchange channel, the heat inlet of the third heat exchange channel is connected to the exhaust port of the gas turbine, and is used to pass the high-temperature exhaust gas discharged from the exhaust port and completed work in the turbine into the third heat exchange channel, and / or the heat inlet of the third heat exchange channel is connected to at least one of the heat outlets of the first heat exchange channel and the second heat exchange channel, and is used to pass the high-temperature exhaust gas discharged from the heat outlets of the first heat exchange channel and / or the second heat exchange channel into the third heat exchange channel; The outlet of the cooling channel of the turbine blade is connected to the inlet of the combustion chamber of the gas turbine, so as to pass the hydrocarbon fuel in the gas phase produced in the cooling channel into the combustion chamber of the gas turbine for combustion; The hydrocarbon fuels include gasoline, diesel, kerosene and natural gas; The ratio of the mixed hydrocarbon fuel in gas phase to water vapor is 8.5:1.5 to 9:1.

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