KR102453314B1 - Fuel cell generation system - Google Patents

Abstract

A fuel cell power generation system (100) according to the present invention comprises: an ammonia reformer (320) that thermally decomposes ammonia; a cooler (380) that cools a high-temperature mixed gas containing undecomposed ammonia, hydrogen, and nitrogen discharged from the ammonia reformer (320); an ammonia adsorber (330) that adsorbs undecomposed ammonia in the cooled mixed gas from the cooler (380); and a fuel cell unit (360) that generates power using hydrogen decomposed from the ammonia, wherein the ammonia adsorber (330) is regenerated through the high-temperature mixed gas discharged from the ammonia reformer (320). Operation costs can be saved.

Description

Fuel cell power generation system {FUEL CELL GENERATION SYSTEM}

The present invention relates to a fuel cell power generation system, and more particularly, it is possible to regenerate undecomposed ammonia adsorbed to an ammonia adsorber through a high-temperature mixed gas from an ammonia reformer, recover and regenerate undecomposed ammonia, and to provide a fuel cell The fuel cell power generation system can be protected by removing undecomposed ammonia contained in the supplied hydrogen, and there is a bypass pipe that can bypass unreacted hydrogen and nitrogen from the fuel cell part to the fuel cell part, so that the combustor uses more fuel than necessary. By preventing supply, it relates to a fuel cell power generation system capable of increasing energy efficiency.

Ammonia easily liquefies at 20°C and 0.857 MPa, and liquid ammonia has a very high weight hydrogen density of 17.8% by weight, and a volumetric hydrogen density of 1.5 to 2.5 times that of liquid hydrogen, attracting attention as a very good hydrogen carrier, When hydrogen is separated by reforming ammonia, ammonia is a carbon-neutral fuel and does not generate carbon dioxide.

On the other hand, recently, in order to solve the problems caused by the use of fossil fuels, fuel cell power generation systems are being actively developed.

The fuel cell reforms LNG (Liquefied Natural Gas, LNG), LPG (liquefied petroleum gas, LPG), methanol (CH ₃ OH), ethanol (C ₂ H ₅ OH), gasoline, etc. It is a power generation system that directly converts the chemical reaction energy of oxygen into electrical energy. A reduction reaction of oxygen, which is an oxidizing agent, occurs in the cathode part of the fuel cell, and an oxidation reaction of hydrogen, a fuel, occurs in the anode part, and electricity, heat, water, etc. are generated through these electrochemical reactions.

On the other hand, when a hydrogen fuel cell using ammonia is applied as a fuel cell power generation system, an ammonia reformer (NH ₃ Reformer) must be provided. In this case, the mixed gas generated from the ammonia reformer may include undecomposed ammonia, which not only causes deterioration of the fuel cell, but may also cause cracks in the anode, which is the anode, and decrease in lifespan.

In this case, an ammonia adsorber may be used to separate undecomposed ammonia to protect the fuel cell, and such an ammonia adsorber may regenerate the ammonia adsorber by desorbing the ammonia previously adsorbed to the ammonia adsorber. For example, when the ammonia adsorber is a thermal swing adsorption (TSA), heat may be applied to the ammonia adsorber to regenerate the ammonia adsorber.

However, in order to regenerate the ammonia adsorber, which is a heating alternating adsorber, a separate equipment capable of providing a heat source must be installed, resulting in an increase in cost.

The technical problem to be achieved by the spirit of the present invention is that undecomposed ammonia adsorbed to the ammonia adsorber can be regenerated through a high-temperature mixed gas from the ammonia reformer, and undecomposed ammonia can be recovered and regenerated, and contained in hydrogen supplied to the fuel cell. It is possible to protect the fuel cell power generation system by removing undecomposed ammonia, and by providing a bypass pipe that can bypass unreacted hydrogen and nitrogen from the fuel cell unit to the fuel cell unit, it prevents excessive fuel supply to the combustor, It is to provide a fuel cell power generation system capable of increasing energy efficiency.

The fuel cell power generation system according to the present invention includes an ammonia reformer 320 for thermally decomposing ammonia, a cooler 380 for cooling a high-temperature mixed gas containing undecomposed ammonia, hydrogen and nitrogen discharged from the ammonia reformer 320, An ammonia adsorber 330 for adsorbing the undecomposed ammonia from the mixed gas cooled by the cooler 380, and a fuel cell unit 360 for generating electric power using the hydrogen decomposed from the ammonia, The ammonia adsorber 330 is regenerated through the high temperature mixed gas discharged from the ammonia reformer 320 .

In addition, a portion of unreacted hydrogen and nitrogen is branched from the fuel cell unit 360 , and the undecomposed ammonia from the ammonia adsorber 330 is combined with the adsorbed mixed gas to the fuel cell unit 360 . can be supplied.

In addition, the fuel cell unit 360 may further include a combustor 350 for receiving and burning the remaining unreacted hydrogen and nitrogen that are not branched among the unreacted hydrogen and nitrogen.

In addition, the cooler 380 may use any one of an air cooling type, a water cooling type, and a method using a separate refrigerant.

In addition, the ammonia adsorber 330 is a heating alternating adsorber, and each of the first tube 331 and the second tube 332, the first tube 331 and the second tube 332 are spaced apart from each other. A first tube tube 333 connected to the inside, and a second tube tube 334 connected to the first tube 331 and the second tube 332 to be in contact with or connected to the outer surface of each to enable heat exchange may include

In addition, the first tube 331 and the second tube 332 are alternately introduced into the first tube 331 and the second tube 332 through the first tube tube 333. The undecomposed ammonia is adsorbed from the mixed gas, and the first tube 331 and the second tube 332 are connected to the first tube 331 and the second tube through the second tube tube 334 ( 332) may be in contact with or connected to the outer surface and alternately heat exchanged with the mixed gas to be regenerated.

In addition, the second tube tube 334 may include a front end second tube tube 3341 connected to the ammonia reformer 320, and a rear end second tube tube 3342 connected to the cooler 380. have.

In addition, the mixed gas supplied from the ammonia reformer 320 to the ammonia adsorber 330 through the front end second tube tube 3341 exchanges heat with the first tube 331 or the second tube 332 . Thus, the first tube 331 or the second tube 332 may be regenerated and supplied to the cooler 380 through the rear end second tube tube 3342 .

In addition, the mixed gas supplied to the cooler 380 through the second tube pipe 3342 at the rear end may be cooled in the cooler 380 .

In addition, the first tube tube 333 includes a front end first tube tube 3331 connected to the cooler 380, and the mixed gas discharged from the cooler 380 is the front end first tube tube ( 3331 ) may be supplied into the first tube 331 or the second tube 332 , and the undecomposed ammonia may be adsorbed in the first tube 331 or the second tube 332 .

In addition, the first tube tube 333 further includes a rear end first tube tube 3332 connected to the fuel cell unit 360 for generating electric power by using the mixed gas to which the undecomposed ammonia is adsorbed, and , the fuel cell unit 360 may supply the hydrogen contained in the mixed gas to which the undecomposed ammonia is adsorbed, which is supplied through the rear end first tube pipe 3332 , as a fuel.

In addition, an ammonia storage tank 370 provided in front of the ammonia reformer 320 to store liquid ammonia, and a vaporizer that vaporizes the liquid ammonia from the ammonia storage tank 370 and supplies it to the ammonia reformer 320 . 310 may be further included.

In addition, the high-temperature combustion product discharged from the combustor 350 may be sequentially supplied to the ammonia reformer 320 and the vaporizer 310 for heat exchange.

In addition, the mixed gas exchanges heat with the first tube 331 or the second tube 332 to regenerate the first tube 331 or the second tube 332 , and the first tube 331 . Alternatively, ammonia desorbed by regeneration of the second tube 332 may be joined to the front end of the ammonia reformer 320 .

In addition, a portion of unreacted hydrogen and nitrogen from the fuel cell unit 360 is branched into a bypass pipe 3602, merges into the rear end first tube pipe 3332, and is supplied to the fuel cell unit 360, Residual unreacted hydrogen and nitrogen that are not branched to the bypass pipe 3602 among the unreacted hydrogen and nitrogen from the fuel cell unit 360 may be supplied to the combustor 350 through the main supply pipe 3601 . .

In the fuel cell power generation system according to an embodiment of the present invention, when an ammonia adsorber is applied as a thermal swing adsorption (TSA) to regenerate the ammonia adsorber, a heat source for regeneration is a high-temperature mixed gas from the ammonia reformer. By using it, it is possible to reduce overall energy consumption and reduce costs because no equipment is required to provide an additional heat source.

In addition, the operation cost of the fuel cell power generation system can be reduced by recycling the undecomposed ammonia desorbed in the ammonia regeneration process by inputting it into the front end of the ammonia reformer.

In addition, the simplification of the system can be realized by omitting the nitrogen adsorption process for producing pure hydrogen.

In addition, it is possible to protect the fuel cell power generation system by removing undecomposed ammonia contained in the hydrogen supplied to the fuel cell unit.

In addition, by providing a bypass pipe capable of bypassing unreacted hydrogen and nitrogen from the fuel cell unit to the fuel cell unit, it is possible to prevent excessive fuel supply to the combustor, thereby increasing energy efficiency.

1 is a schematic diagram of a fuel cell power generation system according to an embodiment of the present invention.
2 is a detailed view of an ammonia adsorber of a fuel cell power generation system according to an embodiment of the present invention.
3 is a view for explaining a state in which the first tube adsorbs undecomposed ammonia in the ammonia adsorber of FIG. 2 and the second tube is regenerated.
4 is a view for explaining a state in which the second tube adsorbs undecomposed ammonia in the ammonia adsorber of FIG. 2 and the first tube is regenerated.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

1 is a schematic diagram of a fuel cell power generation system according to an embodiment of the present invention.

1, the fuel cell power generation system 100 according to an embodiment of the present invention is an ammonia reformer 320 for thermally decomposing ammonia, undecomposed ammonia discharged from the ammonia reformer 320, hydrogen and nitrogen. A cooler 380 for cooling the high-temperature mixed gas containing The battery unit 360 is included, and the ammonia adsorber 330 is regenerated through the high-temperature mixed gas discharged from the ammonia reformer 320, thereby as a heat source for the regeneration of the ammonia adsorber 330 from the ammonia reformer 320. An object of the present invention is to provide a fuel cell power generation system capable of reducing costs by using a high-temperature mixed gas to reduce overall energy consumption and eliminate the need for equipment for providing an additional heat source.

In addition, in the fuel cell power generation system 100 according to an embodiment of the present invention, a portion of unreacted hydrogen and nitrogen in the fuel cell unit 360 is branched, and undecomposed ammonia from the ammonia adsorber 330 is adsorbed. The mixed gas may be combined and re-supplied to the fuel cell unit 360 .

In addition, the fuel cell power generation system 100 according to an embodiment of the present invention is a combustor that receives and combusts residual unreacted hydrogen and nitrogen that are not branched among unreacted hydrogen and nitrogen from the fuel cell unit 360 . ) (350) may be further included.

Meanwhile, the fuel cell power generation system 100 according to an embodiment of the present invention may include a vaporizer 310 and an ammonia storage tank 370 .

The vaporizer 310 may make liquid ammonia (L-NH ₃ ) into gaseous ammonia (G-NH ₃ ). In this case, as a heat source, a high-temperature combustion product discharged from the combustor 350 may be utilized as described later. The fuel cell power generation system 100 may further include an ammonia storage tank 370 for storing liquid ammonia (L-NH ₃ ).

Here, the ammonia storage tank 370 is a tank capable of storing ammonia in a liquid state, and may be a membrane-type tank or an independent tank, and in the case of an independent tank, an IMO type A, IMO type B, or IMO type C storage tank. can be However, the present invention is not necessarily limited thereto, and storage tanks having various structures are possible.

In addition, although not shown, a supply pump for supplying ammonia in a liquid state may be installed inside the ammonia storage tank 370 . The supply pump may be a submerged pump or a deep well pump installed in liquid ammonia.

The vaporizer 310 may receive liquid ammonia (L-NH ₃ ) through a supply pump (not shown) of the ammonia storage tank 370 , and make it into gaseous ammonia (G-NH ₃ ). In this case, as a heat source, a high-temperature combustion product discharged from the combustor 350 may be utilized as described later.

The ammonia reformer (Reformer) 320 may reform gaseous ammonia (G-NH ₃ ) generated in the vaporizer 310 . That is, the ammonia reformer 320 is hydrogen (H ₂ ) and nitrogen (N ₂ ) through pyrolysis (cracking reformer) at a high temperature for ammonia (G-NH ₃ ) in the gaseous state that has passed through the vaporizer 310. Can be decomposed have. At this time, non-decomposed undecomposed ammonia (NH ₃ ) may be generated. In this case, as a heat source, a high-temperature combustion product discharged from the combustor 350 may be utilized as described later.

In addition, the ammonia reformer 320 may be a low-temperature catalytic ammonia cracker. The low-temperature catalytic ammonia decomposer is an ammonia reformer capable of decomposing ammonia at a low temperature, for example, about 400 to 600° C. have. The decomposition catalyst is not limited to the above elements, and may be copper oxide, chromium oxide, manganese oxide, iron oxide, palladium or platinum, or a decomposition catalyst in which chromium, copper or cobalt is supported on zeolite.

For this reason, in the fuel cell power generation system according to the present invention, the amount of heat used for reforming ammonia can be minimized by using the ammonia reformer of the low-temperature catalyst type ammonia reformer.

The cooler 380 may cool the undecomposed ammonia to about 40° C. or less, preferably to an ambient temperature level in order to adsorb the undecomposed ammonia at high temperature from the ammonia reformer 320 in the ammonia adsorber 330 . The cooling method of the cooler 380 is not particularly limited, but may be, for example, an air cooling type, a water cooling type, or a method using a separate refrigerant.

The ammonia adsorber 330 may adsorb undecomposed ammonia (NH ₃ ) discharged from the ammonia reformer 320 . The ammonia adsorber 330 may be a temperature swing adsorber or a thermal swing adsorption (TSA). The heat alternating adsorber may have a structure to regenerate the adsorber by applying heat when saturated after adsorbing impurities.

The ammonia adsorption material of the ammonia adsorber 330 is not particularly limited as long as it can adsorb undecomposed ammonia and can be regenerated in a saturated state, but preferably, adsorption containing any one of zeolite, activated carbon, alumina, and silica. material, or a complex oxide thereof.

2 is a detailed view of an ammonia adsorber of a fuel cell power generation system according to an embodiment of the present invention, and FIG. 3 is a state in which the first tube adsorbs undecomposed ammonia and the second tube is regenerated in the ammonia adsorber of FIG. FIG. 4 is a view for explaining a state in which the second tube adsorbs undecomposed ammonia in the ammonia adsorber of FIG. 2 and the first tube is regenerated.

As shown in FIG. 2 , the ammonia adsorber 330 is spaced apart from each other into the first tube 331 and the second tube 332 , the first tube 331 and the second tube 332 , respectively. A second tube tube 334, a first tube tube ( It may include a first valve 335 installed on the 333, and a second valve 336 installed on the second tube 334.

The first tube tube 333 may include a front end first tube tube 3331 connected to the cooler 380 , and a rear end first tube tube 3332 connected to the rear end fuel cell unit 360 . In addition, the second tube tube 334 may include a front end second tube tube 3341 connected to the ammonia reformer 320 , and a rear end second tube tube 3342 connected to the cooler 380 .

The first tube 331 and the second tube 332 may adsorb undecomposed ammonia that is alternately introduced into the first tube 331 and the second tube 332 through the first tube tube 333 . . In addition, the first tube 331 and the second tube 332 are in contact with or connected to the outer surfaces of the first tube 331 and the second tube 332 through the second tube tube 334 to exchange heat alternately, It can be regenerated by high-temperature mixed gas containing undecomposed ammonia, hydrogen, and nitrogen.

This will be described in detail below with reference to FIGS. 3 and 4 .

First, as shown in FIG. 3 , the first tube 331 is fine powder in the mixed gas containing undecomposed ammonia, hydrogen, and nitrogen, which is introduced through the front end first tube tube 3331 connected to the cooler 380 . In the case of adsorbing ammonia, the second tube 332 is heat-exchanged with a mixed gas containing high-temperature undecomposed ammonia, hydrogen, and nitrogen flowing from the ammonia reformer 320 through the front-end second tube tube 3341 and regenerated. can be Through this, the mixed gas containing undecomposed ammonia, hydrogen, and nitrogen at high temperature is first cooled. The second tube 332 adsorbs undecomposed ammonia in the previous process and regenerates by heat exchange with a mixed gas containing high-temperature undecomposed ammonia, hydrogen, and nitrogen flowing through the front end second tube tube 3341 in a saturated state. can be

On the other hand, since undecomposed ammonia is adsorbed to the first tube 331 , only hydrogen and nitrogen are discharged from the first tube 331 , and hydrogen and nitrogen discharged from the first tube 331 are discharged from the rear end of the first tube tube ( 3332 ) may be input to the fuel cell unit 360 . In addition, the mixed gas containing high-temperature undecomposed ammonia, hydrogen, and nitrogen regenerated by the second tube 332 may be introduced into the cooler 380 through the second tube tube 3342 at the rear end to be cooled. At this time, the mixed gas containing high-temperature undecomposed ammonia, hydrogen, and nitrogen may be secondarily cooled to about 40 degrees or less, preferably at the atmospheric temperature level. Accordingly, the ammonia adsorber 330 is in a state in which undecomposed ammonia is easily adsorbed.

Next, as shown in FIG. 4, the mixed gas containing undecomposed ammonia, hydrogen, and nitrogen that has passed through the cooler 380 is transferred to the second tube 332 regenerated in FIG. 3331), undecomposed ammonia may be adsorbed in the second tube 332 . Since the undecomposed ammonia is adsorbed to the second tube 332 , only hydrogen and nitrogen are discharged from the second tube 332 , and the hydrogen and nitrogen discharged from the second tube 332 are the rear end of the first tube tube 3332 . may be input to the fuel cell unit 360 through the At this time, the first tube 331 is supplied with heat from the mixed gas containing high-temperature undecomposed ammonia, hydrogen, and nitrogen flowing through the front end second tube tube 3341 from the ammonia reformer 320 (heat exchange) and can be played back. As described above, at this time, the mixed gas containing undecomposed ammonia, hydrogen, and nitrogen at high temperature is first cooled. In addition, the mixed gas containing undecomposed ammonia, hydrogen, and nitrogen at high temperature regenerated by the first tube 331 may be introduced into the cooler 380 through the second tube tube 3342 at the rear end to be cooled. At this time, the mixed gas containing high-temperature undecomposed ammonia, hydrogen, and nitrogen may be secondarily cooled to about 40 degrees or less, preferably to an atmospheric temperature level. Accordingly, the ammonia adsorber 330 is in a state in which undecomposed ammonia is easily adsorbed.

On the other hand, when the ammonia adsorbed on the first tube 331 or the second tube 332 is desorbed in the regeneration process, it may be recycled by being introduced into the front end of the ammonia reformer 320 through the first blowing means 210 . At this time, the first blowing means 210 may be a blower.

The operation cost of the fuel cell power generation system can be reduced by injecting and recycling the undecomposed ammonia desorbed in the above-described ammonia regeneration process to the front end of the ammonia reformer 320 .

The first valve 335 may be installed in the first tube tube 333 to adjust the amount of the mixed gas including undecomposed ammonia flowing through the first tube tube 333 . Similarly, the second valve 336 may be installed in the second tube tube 334 to adjust the amount of the mixed gas including undecomposed ammonia flowing through the second tube tube 334 .

As such, when the regeneration process is performed in the first tube 331 , the adsorption process is performed in the second tube 332 , and when the adsorption process is performed again in the first tube 331 , the second tube 332 ), by performing the regeneration process, the ammonia adsorber 330 can be efficiently used.

In this embodiment, the ammonia adsorber 330 consists of only the first tube 331 and the second tube 332, but is not necessarily limited thereto, and the ammonia adsorber 330 consists of three, four or more tubes. It is also possible

For this reason, in the fuel cell power generation system according to an embodiment of the present invention, when the ammonia adsorber is regenerated by applying a thermal swing adsorption (TSA) to the ammonia adsorber, a heat source for regeneration is provided from the ammonia reformer at a high temperature. By using the mixed gas, it is possible to reduce overall energy consumption and reduce costs because no equipment is required to provide an additional heat source.

On the other hand, as shown in FIG. 1 , a portion of unreacted hydrogen and nitrogen is branched from the fuel cell unit 360 , and the undecomposed ammonia from the ammonia adsorber 330 is combined with the adsorbed mixed gas and the fuel cell unit The remaining unreacted hydrogen and nitrogen that are not branched among the unreacted hydrogen and nitrogen from the fuel cell unit 360 may be supplied to the combustor 350 .

Specifically, a portion of unreacted hydrogen and nitrogen from the fuel cell unit 360 may be branched into the bypass pipe 3602 and merged into the rear end first tube pipe 3332 to be supplied to the fuel cell unit 360, Residual unreacted hydrogen and nitrogen that are not branched from the fuel cell unit 360 to the bypass pipe 3602 among the unreacted hydrogen and nitrogen may be supplied to the combustor 350 through the main supply pipe 3601 .

At this time, the bypass pipe 3602 may be provided with a second blowing means 220 to merge a portion of unreacted hydrogen and nitrogen into the rear end first tube pipe 3332 , and in this case, the second blowing means 220 . may be a blower.

For this reason, the combustor 350 combusts unreacted hydrogen and nitrogen in the fuel cell unit 360 to use the high-temperature combustion product as a heat source of the ammonia reformer 320 and sequentially supply it back to the carburetor 310. The thermal energy of combustion products can be utilized.

On the other hand, a portion of the unreacted hydrogen and nitrogen branched by configuring a bypass pipe 3602 capable of branching unreacted hydrogen and nitrogen from the fuel cell unit 360 may be re-supplied to the fuel cell unit 360 . However, through this, it is possible to prevent the supply of unreacted hydrogen and nitrogen more than necessary to the combustor 350 for generating the thermal energy of the high-temperature combustion product.

In other words, it is possible to prevent the supply of unreacted hydrogen and nitrogen to the combustor 350 by exceeding the amount of fuel required to satisfy the temperature conditions of the ammonia reformer 320 and the vaporizer 310, thereby improving energy efficiency. can be raised

The combustor 350 is not particularly limited as long as it can combust hydrogen, and for example, may be a combustion reaction device including a combustion catalyst therein, or a direct combustion device.

The fuel cell unit 360 is a fuel cell using hydrogen as a fuel and is not particularly limited in shape, but is preferably a high-temperature type fuel cell (Solid Oxide Fuel Cell; SOFC), or high-temperature polyelectrolyte fuel. It may be a battery (Polymer Electrolyte Membrane Fuel Cell; PEMFC). A fuel cell refers to an energy conversion cell that directly converts chemical energy of fuel gas into electrical energy. The fuel cell unit 360 may receive hydrogen contained in the mixed gas to which undecomposed ammonia is adsorbed from the ammonia adsorber 330 to generate electric power.

For reference, the fuel cell unit 360 includes an anode section where the oxidation reaction of hydrogen occurs, a cathode section where the reduction reaction of oxygen occurs, and an anode section so that electrons generated by the oxidation reaction of hydrogen in the anode section move to the cathode section. It may include a conducting wire connecting the anode part, the anode part and the cathode part are filled with an electrolyte, and hydrogen cations generated by the oxidation reaction of hydrogen move to the cathode part through the electrolyte. In this case, an oxidation catalyst that promotes the oxidation of hydrogen may be additionally used.

The shape of the fuel cell unit 360 is not limited to the above-described example, and various materials used in the fuel cell unit 360, for example, materials constituting the positive and negative electrodes, electrolytes and catalysts, etc. It is not particularly limited.

Meanwhile, a compressor 230 for supplying pressurized air to the negative electrode of the fuel cell unit 360 may be provided.

In this way, hydrogen is produced by using ammonia (L-NH ₃ ) in a liquid state supplied from the ammonia storage tank 370 , and electric power is produced through the fuel cell unit 360 with the produced hydrogen to be used in various demanding places. It is possible to provide a fuel cell power generation system that can It reduces consumption and does not require equipment to provide an additional heat source, so the cost can be reduced, and the operation cost of the fuel cell power generation system by recycling undecomposed ammonia desorbed in the ammonia regeneration process by inputting it into the front end of the ammonia reformer By installing a bypass pipe 3602 capable of branching unreacted hydrogen and nitrogen from the fuel cell unit 360 and preventing excessive fuel supply to the combustor 350, energy efficiency can be increased and , it is possible to minimize the heat source used in the ammonia reformer by using a low-temperature catalytic ammonia cracker for the ammonia reformer, and to protect the fuel cell power generation system by removing undecomposed ammonia contained in the hydrogen supplied to the fuel cell. .

In the above, the present invention has been described with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments within the scope equivalent to the present invention are possible by those of ordinary skill in the art to which the present invention pertains. Accordingly, the true protection scope of the present invention should be defined by the following claims.

100: fuel cell power generation system 210: first blowing means
220: second blowing means 230: compressor
310: vaporizer 320: ammonia reformer
330: ammonia adsorber 350: combustor
360: fuel cell unit 370: ammonia storage tank
380: cooler

Claims (15)

Ammonia reformer 320 for pyrolyzing ammonia,
A cooler 380 for cooling the high-temperature mixed gas containing undecomposed ammonia, hydrogen and nitrogen discharged from the ammonia reformer 320,
An ammonia adsorber 330 for adsorbing the undecomposed ammonia from the mixed gas cooled from the cooler 380, and
and a fuel cell unit 360 for generating electric power using the hydrogen decomposed from the ammonia,
The ammonia adsorber 330 is regenerated through the high-temperature mixed gas discharged from the ammonia reformer 320, a fuel cell power generation system. The method of claim 1,
A portion of unreacted hydrogen and nitrogen is branched from the fuel cell unit 360 , and the undecomposed ammonia from the ammonia adsorber 330 is combined with the adsorbed mixed gas and supplied to the fuel cell unit 360 . , fuel cell power generation system. 3. The method of claim 2,
The fuel cell power generation system further comprising a combustor 350 for receiving and burning residual unreacted hydrogen and nitrogen that are not branched among the unreacted hydrogen and nitrogen from the fuel cell unit (360). The method of claim 1,
The cooler 380 uses any one of an air cooling type, a water cooling type, and a method using a separate refrigerant, a fuel cell power generation system. The method of claim 1,
The ammonia adsorber 330 is a heating alternating adsorber,
A first tube 331 and a second tube 332 positioned spaced apart from each other,
A first tube tube 333 connected to the inside of each of the first tube 331 and the second tube 332, and
A second tube tube 334 that is in contact with or connected to the outer surface of each of the first tube 331 and the second tube 332 to enable heat exchange.
Including, a fuel cell power generation system. 6. The method of claim 5,
The first tube 331 and the second tube 332 are the mixed gas alternately introduced into the first tube 331 and the second tube 332 through the first tube tube 333 . adsorbing the undecomposed ammonia in
The first tube 331 and the second tube 332 are in contact with or connected to the outer surfaces of the first tube 331 and the second tube 332 through the second tube tube 334 so that the A fuel cell power generation system that is regenerated by alternating heat exchange with the mixed gas. 6. The method of claim 5,
The second tube tube 334 includes a front end second tube tube 3341 connected to the ammonia reformer 320 and a rear end second tube tube 3342 connected to the cooler 380, a fuel cell power generation system. 8. The method of claim 7,
The mixed gas supplied from the ammonia reformer 320 to the ammonia adsorber 330 through the front end second tube tube 3341 exchanges heat with the first tube 331 or the second tube 332 to The fuel cell power generation system, wherein the first tube (331) or the second tube (332) is regenerated and supplied to the cooler (380) through the second end tube (3342). 9. The method of claim 8,
The mixed gas supplied to the cooler (380) through the second end tube (3342) is cooled in the cooler (380). 10. The method of claim 9,
The first tube tube 333 includes a front end first tube tube 3331 connected to the cooler 380,
The mixed gas discharged from the cooler 380 is supplied into the first tube 331 or the second tube 332 through the front end first tube tube 3331 to the first tube 331 or In the second tube (332), the undecomposed ammonia is adsorbed, a fuel cell power generation system. 11. The method of claim 10,
The first tube tube 333 further includes a rear end first tube tube 3332 connected to the fuel cell unit 360 for generating electric power using the mixed gas to which the undecomposed ammonia is adsorbed,
In the fuel cell unit 360, the hydrogen contained in the mixed gas to which the undecomposed ammonia is adsorbed, which is supplied through the rear end first tube pipe 3332, is supplied as a fuel. 4. The method of claim 3,
An ammonia storage tank 370 provided in front of the ammonia reformer 320 to store liquid ammonia, and a vaporizer 310 that vaporizes the liquid ammonia from the ammonia storage tank 370 and supplies it to the ammonia reformer 320 . ) further comprising, a fuel cell power generation system. 13. The method of claim 12,
The high-temperature combustion product discharged from the combustor 350 is sequentially supplied to the ammonia reformer 320 and the vaporizer 310 to exchange heat. 9. The method of claim 8,
The mixed gas is heat-exchanged with the first tube 331 or the second tube 332 to regenerate the first tube 331 or the second tube 332,
A fuel cell power generation system in which ammonia desorbed by regeneration of the first tube (331) or the second tube (332) is joined to the front end of the ammonia reformer (320). 12. The method of claim 11,
A portion of unreacted hydrogen and nitrogen from the fuel cell unit 360 is branched into a bypass pipe 3602, merges into the rear end first tube pipe 3332, and is supplied to the fuel cell unit 360,
Residual unreacted hydrogen and nitrogen that are not branched to the bypass pipe 3602 among the unreacted hydrogen and nitrogen from the fuel cell unit 360 are supplied to the combustor 350 through the main supply pipe 3601, the fuel battery power generation system.

Images