Phase change energy storage enhanced ammonia gas turbine and steam turbine coupling power generation system

Abstract

The utility model discloses a phase change energy storage enhanced ammonia gas turbine and steam turbine coupling power generation system which comprises a liquid ammonia source, a delivery pump, a boiler, a phase change heat reservoir, a cooler, an intercooler, an ammonia steam turbine power generation assembly, a gas turbine power generation assembly, an air pressurization assembly, an ammonia decomposition reactor and a combustor. An inlet of the delivery pump is connected with a liquid ammonia source, an outlet is connected with a three-way node, and liquid ammonia of the delivery pump is divided into a first delivery branch and a second delivery branch by the three-way node; liquid ammonia of the first conveying branch sequentially flows back to a liquid ammonia source through the boiler, the ammonia steam turbine power generation assembly and an ammonia steam channel of the cooler; liquid ammonia of the second conveying branch sequentially passes through the cooler, the intercooler and the ammonia decomposition reactor to enter the combustor; according to the utility model, single ammonia fuel and working medium are adopted, the system is simplified, and the comprehensive energy efficiency of ammonia energy reaches 80-85%.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of generator or engine, concretely relates to a phase change energy storage reinforced ammonia gas turbine and steam turbine coupling power generation system. BACKGROUND

[0002] At present, the power generation or mobile equipment taking gas turbine as power source is developing and applying rapidly, and its main advantage lies in that it has optimal power density, however, under general circumstances, the thermal efficiency of gas turbine is often between 30-40%, and the waste heat of gas turbine is supplied to steam turbine to be a way to improve overall energy efficiency, but due to the difference between the working medium of the two under general circumstances, the coupling system is often complex, bulky and high in cost. UTILITARY MODEL CONTENT

[0003] In order to solve the above-mentioned technical problems, overcome the technical problem that ammonia energy comprehensive energy efficiency is low in the prior art, and for this purpose, the utility model provides a phase change energy storage reinforced ammonia gas turbine and steam turbine coupling power generation system, which adopts single ammonia fuel and working medium, simplifies the system complexity, and the comprehensive energy efficiency of ammonia energy reaches 80-85%.

[0004] The technical scheme adopted is as follows:

[0005] A phase change energy storage reinforced ammonia gas turbine and steam turbine coupling power generation system, the system includes a liquid ammonia source, a delivery pump, a boiler, a phase change heat accumulator, a cooler, a middle cooler, an ammonia steam turbine power generation assembly, a gas turbine power generation assembly, an air supercharging assembly, an ammonia decomposition reactor and a combustor;

[0006] The inlet of the delivery pump is connected with the liquid ammonia source, the outlet of the delivery pump is connected with a three-way node, and the three-way node divides the liquid ammonia of the delivery pump into a first delivery branch and a second delivery branch;

[0007] The liquid ammonia of the first delivery branch reaches the liquid ammonia source through the boiler, the ammonia steam turbine power generation assembly and the ammonia steam passage of the cooler in sequence;

[0008] The liquid ammonia of the second delivery branch enters the combustor through the cooling passage of the cooler, the ammonia passage of the middle cooler and the ammonia decomposition reactor in sequence; the air supercharging assembly compresses the inhaled ambient air and delivers it to the air passage of the middle cooler to exchange heat with the ammonia passage, and then the compressed air is input into the combustion chamber of the combustor through the gas turbine power generation assembly to mix with the hydrogen gas decomposed by the reaction passage of the ammonia decomposition reactor;

[0009] The flue gas generated by the combustion of the combustor is transported to the gas turbine power generation assembly through a pipeline for power generation, and the flue gas discharged after power generation flows through the flue gas passage of the ammonia decomposition reactor, the air supercharging assembly and the phase change heat accumulator in sequence through a pipeline, the phase change heat accumulator is installed at the bottom of the boiler and is used for gasifying the liquid ammonia in the boiler; and the flue gas outlet of the phase change heat accumulator is connected with the tail gas treatment unit.

[0010] Preferably, the ammonia steam turbine power generation assembly comprises a third turbine and a second generator coaxially and drivingly connected with the third turbine, and the third turbine is connected with the ammonia passage outlet of the boiler and the ammonia steam passage inlet of the cooler through a pipeline respectively.

[0011] Further preferably, the gas turbine power generation assembly comprises a first generator, a first compressor coaxially arranged, and a first turbine coaxially arranged and drivingly connected with the rotor of the first generator; the air supercharging assembly comprises a second compressor coaxially arranged and a second turbine, the compressed gas outlet of the second compressor is connected with the air passage inlet of the intercooler through a pipeline for heat exchange of the ammonia passage of the intercooler, the air passage outlet of the intercooler is connected with the compressed gas inlet of the first compressor through a pipeline, and the compressed gas outlet of the first compressor is connected with the combustion chamber of the combustor through a pipeline; the flue gas outlet of the combustor is connected with the inlet of the first turbine through a pipeline, the outlet of the first turbine is connected with the flue gas passage inlet of the ammonia decomposition reactor through a pipeline, the flue gas passage outlet of the ammonia decomposition reactor is connected with the inlet of the second turbine through a pipeline, and the outlet of the second turbine is connected with the phase change heat accumulator through a pipeline.

[0012] Preferably, the second compressor, the second turbine, the first compressor and the first turbine together form a double-shaft turbine, and the rotating shafts of the second turbine and the second compressor and the rotating shafts of the first turbine and the first compressor can be driven to rotate the rotor of the first generator to generate electricity through a power transmission mode of coaxial linkage, gear driving or track driving, independently or jointly.

[0013] Further, the system is further provided with an air compressor and a fuel bottle, and the air compressor and the fuel bottle are connected with the combustion chamber of the combustor through a pipeline respectively.

[0014] Specifically, at the start, the compressed air provided by the air compressor and the fuel gas provided by the fuel bottle are simultaneously input into the combustor, when the outlet temperature of the combustion chamber of the combustor reaches the target process value, the drive of the flue gas turbine power generation assembly is started to operate; when the reaction channel temperature of the ammonia decomposition reactor reaches the process value, and the temperature of the boiler also reaches the target process value, the delivery pump is started; when it is detected that the first generator starts to generate electricity, the air compressor is closed; when it is detected that the product gas stream flowing out of the ammonia decomposition reactor reaches the process value, the fuel bottle is closed.

[0015] Preferably, the fuel in the fuel bottle is a combustible gas or a volatile combustible liquid, which includes one or a mixture of several fuels of natural gas, hydrogen, ammonia, liquefied petroleum gas, methanol, ethanol, propanol, gasoline, aviation fuel.

[0016] Preferably, the reaction channel of the ammonia decomposition reactor is filled with iron-based catalyst and / or ruthenium-based catalyst, and when the ammonia decomposition reactor is normally operated, the ammonia decomposition reaction temperature in the ammonia decomposition reactor is 350-850 DEG C, the ammonia space velocity is 1000-30000 h-1, and the gas pressure in the reaction channel is 0.06-1.8 MPa.

[0017] Further preferably, the ammonia decomposition reaction temperature is 450-580 DEG C, the ammonia space velocity is 5000-12000 h-1, and the outlet gas temperature of the combustion chamber of the combustor is greater than or equal to 750 DEG C.

[0018] The technical scheme of the utility model has the following advantages:

[0019] A. The ammonia steam turbine and the gas turbine in the system of the utility model only use single ammonia fuel, the hydrogen production reaction in the ammonia decomposition reactor is coupled to drive the gas turbine, the system complexity is greatly simplified, and the temperature matching design of each component is achieved to optimize the utilization efficiency of heat energy and kinetic energy, the heat generated in the combustion chamber of the combustor expands the high-temperature flue gas and the surrounding gas to drive the steam turbine to rotate, and the flue gas heat in the combustor is utilized three times:

[0020] Firstly, the flue gas waste heat after the work of the first turbine is used to heat the materials in the ammonia decomposition reactor, and the reaction of the increase of the enthalpy change of the ammonia decomposition hydrogen production is promoted without additional functions;

[0021] Secondly, the kinetic energy of the cooled flue gas drives the work of the second turbine, the principle of turbocharging is used to increase the ambient air once, the energy consumption of the high-pressure air compressor is saved, and the temperature of the pressurized air is increased, which heats the liquid ammonia through heat exchange to provide the energy for the gasification of the liquid ammonia;

[0022] Finally, the flue gas after being cooled again provides energy for the rapid gasification of liquid ammonia, so that the liquid ammonia forms an ammonia gas stream with kinetic energy in the boiler, further driving the work of the third turbine (i.e., the ammonia steam turbine);

[0023] The utility model discloses high comprehensive energy efficiency, and the efficiency for power generation can reach 50 -70%, if the energy efficiency utilization of tail gas is combined, can further reach 80-85%, and simultaneously, the use of zero-carbon ammonia fuel is favorable to promote carbon emission reduction.

[0024] B.The utility model discloses system uses phase change heat accumulator as the heat source of liquid ammonia boiling to drive the work of the third turbine, increases the stability of ammonia steam turbine part, even if the system is in work, the first turbine (i.e., gas turbine part) suspends work because of some reasons, due to the energy storage, time delay function effect of phase change heat accumulator, the third turbine can keep working within a certain time, thereby making the system still have power supply capacity, providing certain guarantee for the stability of overall system.Simultaneously phase change heat accumulator makes heat exchange carry out between gas-liquid, gas-solid phase, improves heat transfer efficiency.

[0025] C.The utility model discloses system uses low-temperature ammonia gas as the coolant of intercooler, improves the work efficiency of intercooler, helps to increase the gas compression ratio of high-pressure compressor, thereby increasing the power of turbine.

[0026] D.The utility model discloses system provides air compressor and fuel bottle, when the device is in the stop state and needs cold start, or standby state needs to change into normal operating state, utilizes air compressor and fuel bottle to start the whole system, until the gas temperature of combustor export, the reaction channel temperature of ammonia decomposition reactor and reaction product flow and the temperature of boiler all reach target process requirement, controls air compressor and fuel bottle to close, realizes the independent operation of system, makes the first generator and second generator can continuously output electric energy.

[0027] E.The utility model discloses system can also directly replace generator with kinetic energy load system, realizes the output of kinetic energy and electric power, is suitable for ship, car and other large -scale mobile equipment and heavy gas turbine, micro -type gas turbine's power generation and heat and power supply, and application is wide. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiment of the utility model, the following will be briefly introduced to the drawings needed to be used in the specific embodiment, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0029] Figure 1The utility model provides a phase change energy storage reinforced ammonia gas turbine and steam turbine coupling power generation system connection schematic diagram (stable operation working condition) is provided.

[0030] Figure 2 The utility model provides a phase change energy storage reinforced ammonia gas turbine and steam turbine coupling power generation system connection schematic diagram (system starts).

[0031] The meaning of identification in the drawing is as follows:

[0032] 1-liquid ammonia source;2-conveying pump;3-three way node;4-boiler;5-phase change heat accumulator

[0033] 6-third turbine

[0034] 7-cooler

[0035] 7a-ammonia steam channel, 7b-cooling channel

[0036] 8-ammonia compressor

[0037] 9-intercooler

[0038] 9a-air channel, 9b-ammonia channel

[0039] 10-ammonia decomposition reactor

[0040] 10a-reaction channel, 10b-flue gas channel

[0041] 11-burner;12-second compressor, 13-second turbine;14-first compressor

[0042] 15-first turbine;16-second generator;17-first generator;18-environmental atmosphere

[0043] 19-tail gas treatment unit;20-air compressor;21-fuel bottle.

[0044] a-first conveying branch;B-second conveying branch. Specific implementation

[0045] The technical scheme of the utility model will be described clearly and completely in connection with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment.Based on the embodiment of the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0046] "Gas space velocity" is the technical term commonly used under the fixed bed reactor technical route, refers to the volume of gas flowing through unit volume catalyst in unit time under standard condition, and its unit commonly used h -1 .

[0047] As Figure 1 The utility model provides a kind of phase change energy storage reinforced ammonia gas turbine and steam turbine coupling power generation system, including liquid ammonia source 1, delivery pump 2, boiler 4, phase change heat accumulator 5, cooler 7, intercooler 9, ammonia steam turbine power generation assembly, gas turbine power generation assembly, air pressure boosting assembly, ammonia decomposition reactor 10 and combustor 11;Herein liquid ammonia source 1 can be one or more liquid ammonia storage tank.Cooler 7 includes ammonia steam passage 7a and cooling passage 7b, intercooler 9 includes air passage 9a and ammonia passage 9b, ammonia decomposition reactor 10 includes reaction passage 10a and flue gas passage 10b.The import of delivery pump 2 is connected with liquid ammonia source 1, the export of delivery pump 2 is connected with three-way node 3, and three-way node 3 divides the liquid ammonia pumped by delivery pump 2 into first delivery branch a and second delivery branch b for delivery.

[0048] The liquid ammonia of first delivery branch a is sequentially returned to liquid ammonia source 1 through boiler 4, ammonia steam turbine power generation assembly, ammonia steam passage 7a of cooler 7, and can be further compressed and liquefied by ammonia compressor 8 and input into liquid ammonia source 1.

[0049] The liquid ammonia of second delivery branch b is sequentially input into the combustion chamber of combustor 11 through cooling passage 7b of cooler 7, ammonia passage 9b of intercooler 9 and ammonia decomposition reactor 10;At the same time, air pressure boosting assembly compresses inhaled ambient air 18 and delivers to air passage 9a of intercooler 9, exchanges heat with ammonia passage 9b, and then is compressed by first air compressor 14 of gas turbine power generation assembly and input into the combustion chamber of combustor 11, mixes with hydrogen gas obtained by decomposing reaction passage 10a of ammonia decomposition reactor 10 in the combustion chamber.The flue gas generated by combustion of combustor 11 is delivered to gas turbine power generation assembly for power generation, and the flue gas discharged after power generation is sequentially flowed through flue gas passage 10b of ammonia decomposition reactor 10, air pressure boosting assembly and phase change heat accumulator 5 in turn, phase change heat accumulator 5 is installed at the bottom of boiler 4, for gasifying liquid ammonia in boiler 4;The flue gas outlet of phase change heat accumulator 5 is connected with tail gas treatment unit 19, and the flue gas treated by tail gas treatment unit 19 can be directly discharged, of course, can also be directly further utilized.

[0050] The ammonia vapor turbine power generation assembly comprises a third turbine 6 and a second generator 16 coaxially connected with the third turbine 6, and the third turbine 6 is connected with the ammonia passage outlet of the boiler 4 and the ammonia vapor passage 7a inlet of the cooler 7 through pipelines. A part of liquid ammonia enters the boiler 4, is vaporized after absorbing heat in the phase change heat accumulator 5, drives the blades of the third turbine 6 to rotate, and then realizes power generation of the second generator 16. The ammonia gas discharged from the outlet of the third turbine 6 enters the ammonia vapor passage 7a of the cooler, exchanges heat with the liquid ammonia of the second delivery branch b, is discharged from the ammonia vapor passage 7a, is compressed by the ammonia compressor 8, and then enters the liquid ammonia source 1.

[0051] The gas turbine power generation assembly comprises a first generator 17 and coaxially arranged first compressor 14 and first turbine 15, the first turbine 15 is coaxially connected with the rotor of the first generator 17; the air pressurization assembly comprises coaxially arranged second compressor 12 and second turbine 13, the compressed gas outlet of the second compressor 12 is connected with the air passage 9a inlet of the intercooler 9 through a pipeline, used for heat exchange of the ammonia passage 9b of the intercooler 9, the air passage 9a outlet of the intercooler 9 is connected with the compressed gas inlet of the first compressor 14 through a pipeline, the compressed gas outlet of the first compressor 14 is connected with the combustion chamber of the combustor 11 through a pipeline; the flue gas outlet of the combustor 11 is connected with the inlet of the first turbine 15 through a pipeline, the outlet of the first turbine 15 is connected with the flue gas passage 10b inlet of the ammonia decomposition reactor 10 through a pipeline, the flue gas passage 10b outlet of the ammonia decomposition reactor 10 is connected with the inlet of the second turbine 13 through a pipeline, the outlet of the second turbine 13 is connected with the phase change heat accumulator 5 through a pipeline, the phase change heat accumulator 5 is used for heating the liquid ammonia in the boiler 4, and then the flue gas is discharged into the tail gas treatment unit 19 for treatment.

[0052] The normal working process of the system is as follows:

[0053] The delivery pump 2 is connected with the liquid ammonia source 1 (liquid ammonia tank), the three-way node 3 is arranged downstream of the delivery pump 2, and liquid ammonia from the delivery pump is divided into two streams to enter two branches; a boiler 4 is arranged downstream of the first delivery branch a, a phase change heat accumulator 5 is arranged at the bottom of the boiler 4, the phase change heat accumulator 5 vaporizes liquid ammonia, ammonia vapor drives the blades of a third turbine 6 to rotate, and in turn drives the rotor of a coaxial first generator 16 to rotate, so that the first generator 16 generates electricity; ammonia vapor flowing out of the boiler 4 enters the third turbine 6, ammonia vapor flowing out of the third turbine 6 enters the ammonia vapor passage 7a inlet of a cooler 7, flows out from the ammonia vapor passage 7a outlet of the cooler 7 after being cooled, and flows into an ammonia compressor 8, and then flows into the delivery pump 1; a part of liquid ammonia enters a second delivery branch b through the three-way node 3, a cooler 7 is arranged downstream of the second delivery branch b, liquid ammonia of the second delivery branch b enters the second inlet of the cooling passage 7b of the cooler 7, is vaporized through heat exchange in the liquid ammonia passage 7b of the cooler, flows out from the second outlet of the liquid ammonia passage 7b of the cooler, and enters the ammonia passage 9b of an intercooler 9; ammonia gas is heat-exchanged in the ammonia passage 9b of the intercooler 9, so that the ammonia gas is further heated, flows out from the ammonia passage 9b of the intercooler 9, passes through the reaction passage 10a of an ammonia decomposition reactor 10, the reaction product flows out from the outlet of the reaction passage 10a of the ammonia decomposition reactor 10, and enters a combustor 11;

[0054] The second compressor 12 and the second turbine 13 are coaxial, and the second turbine 13 drives the second compressor 12; the first compressor 14 and the first turbine 15 are coaxial, and the first turbine 15 drives the first compressor 14; the second compressor 12, the second turbine 13, the first compressor 14 and the first turbine 15 jointly form a double-shaft turbine-driven generator; the rotating shafts of the second turbine 13 and the second compressor 12 and the rotating shafts of the first turbine 15 and the first compressor 14 can be driven by the same airflow, and the rotating shafts of the first turbine 15 and the second turbine 13 are coaxial, and the rotating shafts of the first turbine 15 and the second turbine 13 are hollow, and the rotating shaft of the first turbine 15 passes through the rotating shaft of the second turbine 13, so that the mechanical structure is compact, and the first turbine 15 and the second turbine 13 are not directly mechanically connected; the first turbine 15 and the second turbine 13 are driven by the same airflow in sequence.

[0055] The combustion flue gas flows out of the first turbine 15, enters the ammonia decomposition reactor 10 through the flue gas passage 10b of the ammonia decomposition reactor 10, provides heat for the reaction passage 10a of the ammonia decomposition, then flows out of the flue gas passage 10b of the ammonia decomposition reactor 10, enters the first turbine 13, and the flue gas flow drives the blades of the first turbine 13 to rotate, drives the turbine shaft of the first turbine 13 and the rotating shaft of the second compressor 12 to rotate together.

[0056] The second turbine 13 and the first turbine 15 rotate, respectively drive the corresponding turbine shafts, the rotating shafts of the second compressor 12 and the first compressor 14 to rotate, and then further drive the rotor of the first generator 17 to rotate, so that the first generator 17 generates electricity; the flue gas flows out of the second turbine 13, flows into the phase change heat accumulator 5, and then flows out of the phase change heat accumulator 5, and enters the tail gas treatment unit 19 for further treatment.

[0057] The ammonia decomposition reactor 10 uses a fixed bed reactor technical route, that is, ammonia decomposition reaction catalysts are filled in the reaction channel 10a in the form of a fixed bed, and the temperature of the reaction channel including the catalyst is mainly controlled by flue gas entering the flue gas channel 10b; wherein the ammonia decomposition reaction catalyst is preferably an iron-based catalyst, or a ruthenium-based catalyst, or a mixed filling of the two types of catalysts; after the system runs stably, the reaction conditions of the reactor are as follows: the reaction temperature is 350-850 DEG C, preferably 450-580 DEG C; the space velocity of ammonia gas in the reaction channel 10a is 1000-30000 h -1 , preferably 5000-12000 h -1 , the mass flow rate of ammonia gas entering the ammonia decomposition reactor 10 can be calculated from the filling amount of the catalyst and the target space velocity; the gas pressure in the reaction channel 10a is between 0.06-1.8 MPa; after the ammonia gas flows through the ammonia decomposition catalyst, it is converted into decomposition products to obtain hydrogen and nitrogen, wherein the conversion rate of ammonia is greater than 98.0%.

[0058] The burner 11 contains an ignition device, and under the appropriate fuel flow rate and air flow rate, the compressed gas flow rate is 1-40 times the ammonia gas flow rate flowing into the ammonia decomposition reactor after successful ignition and stable operation of the system; whether the combustion state meets the process conditions is judged by whether the outlet gas temperature of the burner is continuously not lower than 750 DEG C. The working temperature of the boiler 4 is in the range of 60-400 DEG C. The non-compliant emissions in the tail gas, such as NOx, can be further treated by means such as SCR.

[0059] The intercooler 9 used in the utility model can use air cooling or other coolant cooling. In the field, the intercooler 9 is actually a heat exchanger, and its main function is to cool the gas temperature at the outlet of the second compressor 12, thereby facilitating the further compression of the subsequent first compressor 14, improving the overall gas compression ratio, and the outlet gas pressure of the first compressor 14 is higher than that of the second compressor 12. In this embodiment, the low-temperature ammonia from the cooling channel 7b outlet plays the role of coolant in the intercooler 9, and the cooling effect is enhanced.

[0060] The phase change heat accumulator is a device that uses the latent heat of the phase change process of a substance to realize the absorption and release of heat. In this embodiment, the phase change heat accumulator 5 exchanges heat with the tail gas at the outlet of the second turbine 13, stores part of the heat energy, and at the same time, the substance of the phase change heat accumulator 5 changes from one phase state to another phase state; on the other hand, the phase change heat accumulator 5 heats the liquid ammonia entering the boiler 4 to rapidly vaporize, and at the same time, the phase state of the phase change heat accumulator 5 changes in the opposite direction of the foregoing process.

[0061] The phase change heat accumulator 5 fills the required substance in the cavity of the heat accumulator, and the selection method of the required substance mainly considers that the solid-liquid phase change temperature of the related substance needs to be in the range of 60-400 DEG C, and the related substance selection includes but is not limited to metal lead, metal tin, metal gallium, metal lithium, lead-tin eutectic, potassium nitrate, sodium nitrate, potassium chloride-sodium chloride eutectic and the like.

[0062] As shown in Figure 2 The utility model discloses as further preferred implementation of the utility model, be equipped with air compressor 20 and fuel bottle 21 in power generation system, and it is communicated with the combustion chamber of combustor 11 through pipeline respectively.When the power generation system is in the stop state and needs cold start, or the standby state needs to change into normal operating state, needs to operate air compressor 20 and fuel bottle 21, makes the power generation system reach normal operating condition before closing air compressor and fuel bottle, and the specific starting operation method is as follows:

[0063] Open air compressor 20, start fuel bottle 21, make compressed air and fuel gas enter combustor 11 and mix, ignite and burn, and after the temperature of the flue gas formed reaches the target process value, first turbine 15 starts to rotate; The tail gas of first turbine 15 enters the inlet of flue gas passage 10b, when the temperature in reaction passage 10a in ammonia decomposition reactor 10 reaches the process value, and the temperature of boiler 4 also reaches the target process value, start delivery pump 2, make liquid ammonia flow out from liquid ammonia source 1 and further flow; When detecting that first generator 17 starts to generate electricity, air compressor 20 is closed or disconnected with the system, at this time, the air source is switched to ambient atmosphere source 18; When detecting that the product gas stream flowing out from reaction passage 10a reaches the process value, fuel bottle 21 is closed or disconnected with the system; After that, the power generation device can keep continuous operation, and first generator 17 and second generator 16 can continuously output electric energy. Fuel bottle 21 is filled with combustible gas or volatile combustible liquid, such as natural gas, hydrogen, ammonia, liquefied petroleum gas, methanol, ethanol, propanol, gasoline, aviation fuel, etc., which can stably burn in air or liquid fuel, or a mixture or combination of these fuels.

[0064] In addition, the first generator 17 and / or the second generator 16 in Figure 1 And Figure 2 Can be replaced by a kinetic energy load system, which can be a flywheel, a propeller, a power gear, a rotating shaft or other elements that can drive machines to obtain kinetic energy, and can realize the output of kinetic energy and electric power, suitable for large mobile equipment such as ships and cars, of course, can also be used for heavy gas turbines and micro gas turbines for power generation and combined heat and power, wherein the micro gas turbine is 30-500Kw, and the heavy gas turbine is 30-400MW.

[0065] The utility model is not described, and all applicable to the prior art.

[0066] Obviously, the above embodiments are merely exemplary and not intended to limit the embodiments. Based on the above description, one of ordinary skill in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A phase change energy storage augmented ammonia gas turbine and steam turbine coupled power generation system, characterized by, The system comprises a liquid ammonia source (1), a delivery pump (2), a boiler (4), a phase change heat accumulator (5), a cooler (7), an intercooler (9), an ammonia vapor turbine power generation assembly, a gas turbine power generation assembly, an air pressurization assembly, an ammonia decomposition reactor (10) and a combustor (11); The inlet of the delivery pump (2) is connected with the liquid ammonia source (1), and the outlet of the delivery pump (2) is connected with a three-way joint (3), which divides the liquid ammonia of the delivery pump (2) into a first delivery branch (a) and a second delivery branch (b); The liquid ammonia of the first delivery branch (a) is sequentially returned to the liquid ammonia source (1) through the boiler (4), the ammonia vapor turbine power generation assembly and the ammonia vapor passage (7a) of the cooler (7); The liquid ammonia of the second delivery branch (b) is sequentially passed through the cooling passage (7b) of the cooler (7), the ammonia passage (9b) of the intercooler (9) and the ammonia decomposition reactor (10) into the combustor (11); the air pressurization assembly compresses the ambient air (18) and delivers it to the air passage (9a) of the intercooler (9) to exchange heat with the ammonia passage (9b), and then is compressed by the gas turbine power generation assembly and input into the combustion chamber of the combustor (11) to mix with the product gas decomposed by the reaction passage (10a) of the ammonia decomposition reactor (10); The flue gas generated by the combustion of the combustor (11) is delivered to the gas turbine power generation assembly to generate power, and the flue gas discharged after power generation is sequentially passed through the flue gas passage (10b) of the ammonia decomposition reactor (10), the air pressurization assembly and the phase change heat accumulator (5), which is installed at the bottom of the boiler (4) and used for vaporizing the liquid ammonia in the boiler (4); the flue gas outlet of the phase change heat accumulator (5) is connected with a tail gas treatment unit (19).

2. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 1, wherein, The ammonia vapor turbine power generation assembly comprises a third turbine (6) and a second generator (16) coaxially connected with the third turbine (6); the third turbine (6) is connected with the ammonia passage outlet of the boiler (4) and the ammonia vapor passage (7a) inlet of the cooler (7) through pipelines, respectively.

3. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 1, wherein, The gas turbine power generation assembly comprises a first generator (17) and coaxially arranged first compressor (14), first turbine (15), the first turbine (15) is coaxially driving connection with the rotor of the first generator (17);The air supercharging assembly comprises coaxially arranged second compressor (12) and second turbine (13), the compressed gas outlet of the second compressor (12) is connected with the air passage (9a) inlet of the intercooler (9) through pipeline, for heat exchange to the ammonia passage (9b) of the intercooler (9), the air passage (9a) outlet of the intercooler (9) is connected with the compressed gas inlet of the first compressor (14) through pipeline, the compressed gas outlet of the first compressor (14) is communicated with the combustion chamber of the combustor (11) through pipeline;The flue gas outlet of the combustor (11) is connected with the inlet of the first turbine (15) through pipeline, the outlet of the first turbine (15) is connected with the flue gas passage (10b) inlet of the ammonia decomposition reactor (10) through pipeline, the flue gas passage (10b) outlet of the ammonia decomposition reactor (10) is connected with the inlet of the second turbine (13) through pipeline, the outlet of the second turbine (13) is connected with the phase change heat accumulator (5) through pipeline.

4. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 3, wherein, The second compressor (12), second turbine (13), first compressor (14) and first turbine (15) together constitute a double-shaft turbine, the rotating shafts of the second turbine (13) and second compressor (12) and the rotating shafts of the first turbine (15) and first compressor (14) can be driven to rotate the rotor of the first generator (17) by means of co-axial linkage, gear driving or track driving, so as to generate electricity.

5. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 3 or 4, wherein, The system is also provided with an air compressor (20) and a fuel bottle (21), which are respectively communicated with the combustion chamber of the combustor (11) through pipeline.

6. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 5, wherein, When starting, the compressed air provided by the air compressor (20) and the fuel gas provided by the fuel bottle (21) are simultaneously input into the combustor (11), when the outlet temperature of the combustion chamber of the combustor (11) reaches the target process value, the flue gas turbine power generation assembly is driven to operate;When the reaction channel (10a) temperature of the ammonia decomposition reactor (10) reaches the process value, and the temperature of the boiler (4) also reaches the target process value, the delivery pump (2) is started;When it is detected that the first generator (17) starts to generate electricity, the air compressor (20) is closed;When it is detected that the product gas stream flowing out of the ammonia decomposition reactor (10) reaches the process value, the fuel bottle (21) is closed.

7. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 6, wherein, The fuel in the fuel bottle (21) is combustible gas or volatile combustible liquid, which includes one or a mixture of several fuels of natural gas, hydrogen, ammonia, liquefied petroleum gas, methanol, ethanol, propanol, gasoline, aviation fuel.

8. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 1, wherein, The iron-based catalyst and / or ruthenium-based catalyst is filled in the reaction channel (10a) of the ammonia decomposition reactor (10), and the ammonia decomposition reactor (10) is normally operated at an ammonia decomposition reaction temperature of 350-850℃ and an ammonia space velocity of 1000-30000h -1 , and the gas pressure in the reaction channel (10a) is 0.06-1.8MPa.

9. The phase change thermal storage augmented ammonia gas turbine and steam turbine coupled power generation system of claim 8, wherein, The ammonia decomposition reaction temperature is 450-580℃, and the ammonia space velocity is 5000-12000 h -1 The gas temperature at the outlet of the combustion chamber of the burner (11) is ≥750℃.

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