Ammonia decomposition system and ammonia decomposition method

Abstract

To provide an ammonia decomposition system by which improved decomposition efficiency is provided.SOLUTION: An ammonia decomposition system according to an embodiment of the present disclosure comprises: a cracker for generating hydrogen by decomposing ammonia; a heating part for heating the cracker; a fuel battery for feeding power inside the battery by reacting the hydrogen; a bypass line for connecting a pipeline of connecting the cracker with the fuel battery, and another pipeline of connecting the fuel battery with the heating part; a sensing part for sensing temperature inside the cracker; and a control part for receiving temperature information inside the cracker from the sensing part. The control part that receives remaining ammonia information inside the cracker controls an operation of the bypass line based on at least one of the temperature information and the remaining ammonia information.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an ammonia decomposition system and method. [Background technology]

[0002] In mobile environments such as ships and dump trucks, load fluctuations can occur frequently. This can result in a decrease in the ammonia decomposition rate if the feedback logic for the ammonia decomposition reaction in a plant environment such as a chemical plant is applied directly to a mobile environment.

[0003] In particular, during load-following operating conditions such as sudden acceleration and deceleration in ships and dump trucks, the ammonia decomposition reaction in a plant-scale environment can become easily uncontrolled, potentially resulting in a loss of overall system power output and battery performance degradation.

[0004] The process of decomposing ammonia to produce hydrogen is an endothermic reaction that requires a lot of heat. When a large amount of ammonia flows into the cracker during load following in a ship or dump truck environment, the temperature inside the cracker drops suddenly, and an endothermic reaction can occur at a relatively low temperature. This can result in a low hydrogen conversion rate and an increase in the amount of residual ammonia due to incomplete reactions. Summary of the Invention [Problem to be solved by the invention]

[0005] According to embodiments of the present disclosure, an ammonia decomposition system is provided that offers improved decomposition efficiency.

[0006] According to embodiments of the present disclosure, an ammonia decomposition method is provided that provides improved decomposition efficiency.

[0007] By utilizing the ammonia decomposition system and ammonia decomposition method according to the embodiments of the present disclosure, an environmentally friendly system capable of producing clean energy can be realized. [Means for solving the problem]

[0008] An ammonia decomposition system according to an embodiment of the present disclosure includes a cracker that decomposes ammonia to generate hydrogen, a heating unit that heats the cracker, a fuel cell that reacts the hydrogen to supply power to a battery, piping that connects the cracker and the fuel cell and a bypass line that connects the piping that connects the fuel cell and the heating unit, a sensing unit that senses the temperature inside the cracker, and a control unit that receives temperature information inside the cracker from the sensing unit. The control unit receives information about the residual ammonia inside the cracker and controls the operation of the bypass line based on at least one of the temperature information and the residual ammonia information.

[0009] In some embodiments, the bypass line may include a hydrogen supply pipe and a bypass valve for adjusting the hydrogen flow rate of the hydrogen supply pipe. The controller may control the operation of the bypass line by opening the bypass valve when the temperature inside the cracker is lower than a predetermined temperature.

[0010] In some embodiments, the ammonia decomposition system may further include an absorption unit that absorbs residual ammonia discharged from the cracker. The absorption unit may be located between the discharge pipe of the cracker and the absorption pipe of the fuel cell. The discharge pipe of the cracker may be provided at the absorption pipe of the absorption unit, and the absorption pipe of the fuel cell may be provided at the discharge pipe of the absorption unit. The bypass line may connect the discharge pipe of the cracker or the absorption pipe of the absorption unit to the discharge pipe of the fuel cell, or may connect the discharge pipe of the absorption unit or the absorption pipe of the fuel cell to the discharge pipe of the fuel cell.

[0011] In some embodiments, the control unit can be configured to open the bypass valve and control operation of the bypass line when residual ammonia inside the cracker is equal to or greater than a preset amount.

[0012] In some embodiments, the ammonia decomposition system may further include a separation membrane that allows permeation of the hydrogen and nitrogen from the hydrogen, nitrogen, and residual ammonia discharged from the discharge pipe of the cracker.

[0013] In some embodiments, the ammonia decomposition system may further include a first valve for adjusting the flow rate of ammonia entering from the absorption piping of the cracker, and a second valve for adjusting the flow rates of hydrogen, nitrogen, and residual ammonia exiting from the discharge piping of the cracker.

[0014] In some embodiments, the control unit can be configured to close at least one of the first valve and the second valve and control the pressure and elevated temperature inside the cracker when the residual ammonia inside the cracker is equal to or greater than a preset amount.

[0015] In some embodiments, the ammonia decomposition system may further include a pressurizing unit that adjusts the pressure inside the cracker.

[0016] In some embodiments, the control unit may be configured to increase the pressure inside the cracker by the pressurizing unit when the residual ammonia inside the cracker is equal to or greater than a preset amount.

[0017] In an ammonia decomposition method according to an embodiment of the present disclosure, temperature information inside a cracker that decomposes ammonia to generate hydrogen is received from a sensing unit that senses the internal temperature of the cracker, information on residual ammonia inside the cracker is received, and operation of a bypass line connecting a pipe connecting the cracker and a fuel cell and a pipe connecting the fuel cell and a heating unit is controlled based on at least one of the temperature information and the residual ammonia information. [Effects of the Invention]

[0018] According to the above-described embodiments of the present disclosure, the ammonia decomposition system includes a bypass line between the cracker and the absorber or between the absorber and the fuel cell, and the operation of the bypass line can be controlled based on the temperature and the amount of residual ammonia in the cracker.

[0019] According to an exemplary embodiment, the ammonia decomposition system can promote the ammonia decomposition reaction within the cracker by utilizing a valve in the bypass line, a valve in the absorption or discharge piping of the cracker, a separation membrane adjacent to the discharge piping of the cracker, etc.

[0020] The effects of the present disclosure are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic block diagram of an ammonia decomposition system according to an exemplary embodiment. [Figure 2] FIG. 2 is a schematic block diagram illustrating the configuration of an ammonia decomposition system according to an exemplary embodiment. [Figure 3] FIG. 3 is a schematic flow chart illustrating a method for decomposing ammonia under load following conditions with a bypass line according to an exemplary embodiment. [Figure 4]FIG. 4 is a flow chart illustrating a method for decomposing ammonia under load following conditions with a bypass line according to an exemplary embodiment. [Figure 5a] FIG. 5a is a block diagram illustrating an exemplary repositioning of a bypass line. [Figure 5b] FIG. 5b is a block diagram illustrating an exemplary repositioning of the bypass line. [Figure 6] FIG. 6 is a block diagram of an ammonia decomposition system including a separation membrane according to an exemplary embodiment. [Figure 7] FIG. 7 is a block diagram of a valving ammonia decomposition system according to an exemplary embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] The same reference numerals refer to the same components throughout this disclosure. This disclosure does not describe all elements of the embodiments, and general content in the technical field to which the disclosure belongs or content that is duplicated in the embodiments will be omitted. The terms "unit, module, component, block" used in this specification may be embodied in software or hardware, and depending on the embodiment, multiple "units, modules, components, blocks" may be embodied as one component, or one "unit, module, component, block" may include multiple components.

[0023] Throughout this specification, when a part is "coupled" to another part, it means not only a direct connection but also an indirect connection, including a connection via a wireless communication network.

[0024] Furthermore, unless otherwise specified, when a part "comprises" a certain component, it does not exclude other components, but means that it may further include other components.

[0025] Throughout this specification, a member being "on" another member includes not only when the member is in contact with the other member, but also when there is another member between the two members.

[0026] The terms "first," "second," etc. are used to distinguish one component from another, and are not intended to limit the components.

[0027] The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0028] The identification numbers in each step are used for ease of description and do not dictate the order of the steps, and the steps may be performed in a manner other than the stated order unless the context clearly dictates a particular order.

[0029] Hereinafter, the application principle and embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0030] The term "device according to the present disclosure" as used herein includes all of the various devices capable of performing computational processing and providing a result to a user. For example, the device according to the present disclosure may include all of a computer, a server device, and a portable terminal, and may take any of these forms.

[0031] Here, the computer may include, for example, a notebook computer, a desktop computer, a laptop computer, a tablet PC, a slate PC, etc., equipped with a web browser.

[0032] The server device is a server that communicates with external devices and processes information, and may include an application server, a computing server, a database server, a file server, a game server, a mail server, a proxy server, a web server, etc.

[0033] The portable terminal is, for example, a wireless communication device that ensures portability and mobility, and may include all kinds of handheld-based wireless communication devices such as PCS (Personal Communication System), GSM (Global System for Mobile communications), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), WiBro (Wireless Broadband Internet) terminals, and smartphones, as well as wearable devices such as watches, rings, bracelets, anklets, necklaces, glasses, contact lenses, or head-mounted devices (HMDs).

[0034] 1 is a schematic block diagram of an ammonia decomposition system according to an exemplary embodiment. According to an exemplary embodiment, the ammonia decomposition system may be embodied in a bypass ammonia decomposition system.

[0035] 1, an ammonia decomposition system 10 includes a cracker 100, a fuel cell 200, a bypass line 300, a heating unit 400, an absorption unit 510, and a sensing unit 600. Each component / node can transmit and receive data to and from other components / nodes. Each node can be connected via a network.

[0036] The ammonia decomposition system 10 can decompose ammonia (NH3) supplied via the cracker 100. If the internal temperature of the cracker 100 temporarily drops, the ammonia decomposition rate may decrease due to catalyst deactivation or performance degradation inside the cracker 100. This increases the relative amount of residual ammonia inside the cracker 100, which may again decrease the ammonia decomposition rate.

[0037] The cracker 100 receives ammonia and can produce hydrogen (H2), nitrogen (N2), and ammonia (NH3) as decomposition products. The respective fluids absorbed through the absorption unit 510 are then supplied to the fuel cell 200 and can be used to power the battery. According to an exemplary embodiment, the ammonia decomposition reaction in the ammonia decomposition system 10 is an endothermic reaction. As a result, the temperature within the ammonia decomposition system 10 may decrease as the ammonia decomposition reaction occurs. In this case, the amount of residual ammonia may increase due to incomplete decomposition of ammonia. The ammonia decomposition system 10 according to an embodiment of the present disclosure can continuously promote the ammonia decomposition reaction, thereby reducing the amount of residual ammonia.

[0038] The fuel cell 200 according to an exemplary embodiment may supply nitrogen and unconverted hydrogen to the heating unit 400 before being supplied back to the cracker 100. This may induce a temperature rise effect in the cracker 100 due to the temperature of the unconverted hydrogen being relatively higher than the temperature inside the cracker 100. As described above, the ammonia decomposition system 10 may provide a temperature rise effect by compensating for the imbalance of materials supplied to the cracker 100 and the temperature drop due to the endothermic reaction.

[0039] In the heating section 400, flue gas can be discharged after the aforementioned reaction.

[0040] FIG. 2 is a schematic block diagram illustrating the configuration of an ammonia decomposition system according to an exemplary embodiment.

[0041] 2, the ammonia decomposition system 10 may include a cracker 100, a control unit 110, a fuel cell 200, a bypass line 300, a heating unit 400, an absorption unit 510, and a sensing unit 600. The internal configuration included in the ammonia decomposition system 10 is not limited thereto. The ammonia decomposition system 10 of the present disclosure may include a processing server or a cloud server that can substantially perform the functions of the control unit 110 in place of the control unit 110. The cracker 100 of the ammonia decomposition system 10 may include a reactor.

[0042] The cracker 100 may include a sensing unit 600 that senses the internal temperature of the cracker 100. The control unit 110 may receive internal temperature information of the cracker 100 from the sensing unit 600. According to an exemplary embodiment, the sensing unit 600 may sense the amount of residual ammonia inside the cracker. The control unit 110 may receive information on the amount of residual ammonia inside the cracker 100 from the sensing unit 600. The sensing unit 600 includes a sensor that can sense various information inside the cracker 100 (e.g., the temperature inside the cracker, the amount of residual ammonia inside the cracker, etc.). The control unit 110 may receive the information sensed by the sensing unit 600.

[0043] According to an exemplary embodiment, the control unit 110 can control the operation of the bypass line 300 based on at least one of temperature information and residual ammonia information.

[0044] In one embodiment, the control unit 110 can control the operation of the bypass line 300 to open the bypass valve 310 when the internal temperature of the cracker 100 is below a preset temperature. In one embodiment, the control unit 110 can control the operation of the bypass line 300 to open the bypass valve 310 when the residual ammonia inside the cracker is equal to or greater than a preset amount.

[0045] According to an exemplary embodiment, the bypass line 300 may include a hydrogen supply pipe 320 and a bypass valve 310. The hydrogen supply pipe 320 may supply hydrogen, which is a product of the ammonia decomposition reaction inside the cracker 100. For example, the bypass valve 310 may adjust the hydrogen flow rate in the hydrogen supply pipe.

[0046] In one embodiment, the act of opening the valve may be the act of opening the entire valve. In one embodiment, the act of opening the valve may be the act of opening a portion of the valve. In one embodiment, when the bypass valve 310 is opened, flow to the fuel cell 200 may be blocked.

[0047] According to an exemplary embodiment, the act of opening the valve allows the valve to be adjusted to open in a range between a fully closed state and a fully open state.

[0048] The heating section 400 is disposed adjacent to the cracker 100 and is capable of heating the cracker 100. The heating section 400 is capable of heating the cracker 100. The heating section 400 is capable of heating hydrogen and / or ammonia supplied into the cracker 100.

[0049] The heating unit 400 may penetrate the interior of the cracker 100, extend into the interior of the cracker 100, surround the exterior of the cracker 100, or be adjacent to the cracker 100 to transfer heat. Thus, the heating unit 400 may increase the temperature inside the cracker 100 so as to further induce an endothermic (decomposition) reaction of ammonia inside the cracker 100.

[0050] The heating unit 400 may include at least one pipe. The control unit 110 controls the operation of the bypass line 300 based on the temperature information, and heats the cracker 100 through the at least one pipe.

[0051] The absorption unit 510 can absorb residual ammonia discharged from the cracker 100. For example, the absorption unit 510 can be located between the discharge pipe 150 of the cracker 100 and the absorption (inlet) pipe of the fuel cell 200.

[0052] In one embodiment, the absorber 510 can use the absorption piping 210 of the fuel cell 200 as the exhaust piping for the absorber 510 while using the exhaust piping 150 of the cracker 100 as the absorption piping for the absorber 510 .

[0053] The memory unit (not shown) can store data supporting various functions of the ammonia decomposition system 10 and programs for the operation of the control unit 110. The memory unit can store input / output data (e.g., images, videos, etc.). The memory unit can store application programs (or applications) operated in the ammonia decomposition system 10, and data and commands for the operation of the ammonia decomposition system 10. At least a portion of the application programs can be downloaded from an external server via wireless communication.

[0054] The storage unit may include at least one type of storage medium selected from the group consisting of network attached storage (NAS), flash memory, hard disk, solid state disk (SSD), silicon disk drive (SDD), micro multimedia card, card-type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, and optical disk. The storage unit may also include a database that is separate from the ammonia decomposition system 10 but connected to it via wired or wireless connection.

[0055] The ammonia decomposition system 10 may further include an output unit (not shown). The output unit may generate an output related to a visual, auditory, or tactile sense, and may include a display unit.

[0056] The display unit may form an interlayer structure with a touch sensor or may be provided as an integral structure with the touch sensor to implement a touch screen. The touch screen may be provided as a user input unit that provides an input interface between the ammonia decomposition system 10 and a user, and may also provide an output interface between the ammonia decomposition system 10 and a user.

[0057] The display unit (not shown) displays (outputs) information processed in the ammonia decomposition system 10. For example, the display unit can display execution screen information of an application program (e.g., an application) running in the ammonia decomposition system 10, or UI (User Interface) or GUI (Graphical User Interface) information based on the execution screen information.

[0058] At least one component may be added or removed depending on the performance of the components shown in Figure 2. Furthermore, it will be readily apparent to those skilled in the art that the relative positions of the components may be changed depending on the performance and structure of the ammonia decomposition system 10.

[0059] Meanwhile, each configuration shown in FIG. 2 may refer to software and / or hardware configurations such as a Field Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).

[0060] FIG. 3 is a schematic flow chart illustrating a method for decomposing ammonia under load following conditions with a bypass line according to an exemplary embodiment.

[0061] 3, in step S310, a control unit (e.g., control unit 110 of FIG. 2) may receive temperature information inside a cracker (e.g., cracker 100 of FIG. 1). For example, the control unit 110 may receive various information generated through a sensing unit (e.g., sensing unit 600 of FIG. 2) included in the cracker 100 and configured to sense various information inside the cracker 100. The information received by the control unit 110 may include temperature information inside the cracker 100.

[0062] In step S320, the control unit 110 may receive information about the residual ammonia in the cracker 100. The residual ammonia information includes information about the amount of residual ammonia remaining as a product after the ammonia reaction in the cracker 100. The information received by the control unit 110 may include information about the amount of residual ammonia in the cracker 100.

[0063] At least a portion of the residual ammonia can be discharged from the cracker 100 through the discharge line of the cracker 100 and can be flowed into the absorption line of an absorption section (eg, absorption section 510 in FIG. 2).

[0064] In step S330, the control unit 110 can control the operation of the bypass line based on at least one of temperature information inside the cracker 100 and information on the amount of residual ammonia.

[0065] According to exemplary embodiments, the control unit 110 can control the operation of the bypass line 300 to increase the efficiency of the ammonia decomposition reaction within the cracker 100. In some embodiments, the control unit 110 can control the operation of the bypass line 300 to increase the temperature within the cracker 100. In some embodiments, the control unit 110 can control the operation of the bypass line 300 to reduce the amount of residual ammonia within the cracker 100.

[0066] FIG. 4 is a flow chart illustrating a method for decomposing ammonia under load following conditions with a bypass line according to an exemplary embodiment.

[0067] Referring to FIG. 4, in step S410, a control unit (e.g., control unit 110 of FIG. 2) can compare the internal temperature of a cracker (e.g., cracker 100 of FIG. 1) with a preset temperature. For example, the control unit 110 can check whether the internal temperature of the cracker 100 is below the preset temperature. The preset temperature can be stored in the memory unit. In some embodiments, the preset temperature can correspond to a critical temperature at which an ammonia decomposition reaction can occur inside the cracker 100.

[0068] In step S420, the control unit 110 can compare the amount of residual ammonia inside the cracker 100 with a preset amount. For example, the control unit 110 can check whether the amount of residual ammonia inside the cracker is equal to or greater than the preset amount. The preset amount can be stored in the memory unit. In some embodiments, the preset amount can correspond to a critical amount of residual ammonia that can inhibit the ammonia decomposition reaction inside the cracker 100.

[0069] The critical residual ammonia amount may be the amount at which the ammonia decomposition reaction within the cracker 100 begins to be inhibited when the residual ammonia within the cracker 100 is reused as ammonia, which is a reactant.

[0070] That is, the critical residual ammonia amount can be determined by the ratio of products to a certain reactant at the point when the ammonia decomposition productivity inside the cracker 100 changes from positive (+) to negative (-), even if the residual ammonia is reused as a reactant.

[0071] In step S430, the control unit 110 can control the operation of the bypass line (eg, the bypass line 300 in FIG. 2) to open the bypass valve.

[0072] In one embodiment, in step S410, if the internal temperature of the cracker 100 is lower than the preset temperature, the control unit 110 controls the operation of the bypass line 300 to open the bypass valve. The control unit 110 can control the degree of opening of the bypass valve in stages depending on the difference between the preset temperature and the internal temperature of the cracker 100.

[0073] In one embodiment, in step S420, if the residual ammonia is equal to or greater than the preset amount, the control unit 110 controls the operation of the bypass line 300 to open the bypass valve. The control unit 110 can control the degree to which the bypass valve is opened in stages depending on the difference between the preset amount and the amount of residual ammonia.

[0074] As described above, the control unit 110 can control the degree of opening of the bypass valve in proportion to the degree of the temperature or amount difference.

[0075] In step S440, the control unit 110 may control the pressure unit to operate. The pressure unit may be a device that applies pressure to the cracker 100 to adjust the pressure inside the cracker 100. The temperature inside the cracker 100 may increase due to the pressure unit.

[0076] In step S420, if the residual ammonia is equal to or greater than the preset amount, the control unit 110 may control the operation of the pressurizing unit so as to increase the pressure inside the cracker 100, instead of opening the bypass valve. As the pressurizing unit applies pressure to the cracker 100, the temperature inside the cracker 100 may increase. This may promote the ammonia decomposition reaction inside the cracker 100 so as to reduce the amount of residual ammonia inside the cracker 100.

[0077] 5a and 5b are block diagrams showing exemplary repositioning of the bypass line. In Figures 5a, 5b, 6 and 7, the exhaust piping 150, absorption piping 210, hydrogen supply piping 320 and bypass valve 310 shown in Figure 1 are omitted for ease of illustration.

[0078] 5a and 5b, the connection position of the bypass line 300 can be changed as needed. The ammonia decomposition system 10 may include the bypass line 300 to interact with the stage before a portion of the residual ammonia flows into the absorption unit 510, or with the stage after the residual ammonia is absorbed in the absorption unit 510 and only hydrogen and nitrogen are discharged.

[0079] The bypass line 300 can connect a pipe connecting the cracker 100 and the fuel cell 200 to a pipe connecting the fuel cell 200 and the heating unit 400. As a result, the control unit 110 can supply relatively high-temperature hydrogen from the hydrogen supply pipe of the bypass line 300 to the heating unit.

[0080] 5a, the bypass line 300 can be located between the discharge pipe of the cracker 100 and the absorption pipe of the fuel cell 200. In this case, the ammonia decomposition system 10 can use the discharge pipe of the cracker 100 as the absorption pipe of the absorber 510, and the absorption pipe of the fuel cell 200 as the discharge pipe of the absorber 510. The bypass line 300 can connect the discharge pipe of the cracker 100 or the absorption pipe of the absorber 510 and the discharge pipe of the fuel cell 200.

[0081] 5b, the bypass line 300 may be located between the discharge pipe of the absorber 510 and the absorption pipe of the fuel cell 200. In this case, the bypass line 300 may connect the discharge pipe of the absorber 510 or the absorption pipe of the fuel cell 200 to the discharge pipe of the fuel cell 200.

[0082] The ammonia decomposition system 10 can control the operation of the bypass line 300 so that hydrogen in the product can bypass the fuel cell 200. The ammonia decomposition system 10 can have a structure that can utilize residual heat from the battery.

[0083] In the ammonia decomposition system 10 according to the exemplary embodiment, the battery can be disposed adjacent to the heating section 400. This allows the ammonia decomposition system 10 to rapidly increase the temperature inside the cracker 100.

[0084] FIG. 6 is a block diagram of an ammonia decomposition system including a separation membrane according to an exemplary embodiment.

[0085] 6, the ammonia decomposition system 10 may include a separation membrane 700 adjacent to the cracker 100 or connected to the discharge pipe of the cracker 100. The separation membrane 700 allows hydrogen and nitrogen to pass through among the hydrogen, nitrogen, and residual ammonia discharged from the discharge pipe of the cracker 100. The separation membrane 700 can prevent the residual ammonia from flowing into the absorption pipe of the absorption unit 510.

[0086] The separation membrane 700 may include a material that does not allow ammonia particles to pass through in one direction. For example, the separation membrane 700 may have a structure including a membrane filter. This allows the ammonia decomposition system 10 to prevent residual ammonia from being discharged outside the separation membrane 700.

[0087] In one embodiment, the separation membrane 700 can block the permeation of ammonia particles through an electrical reaction. The ammonia decomposition system 10 can control the operation of the separation membrane 700 based on the residual ammonia information. For example, when residual ammonia is detected in the discharge pipe of the cracker 100, the control unit 110 can control the separation membrane 700 to prevent the residual ammonia from flowing to the absorption unit 510 or the bypass line 300.

[0088] FIG. 7 is a block diagram of a valving ammonia decomposition system according to an exemplary embodiment.

[0089] Referring to FIG. 7, the ammonia decomposition system 10 may include valves 120 and 130 (e.g., a first valve 120 and a second valve 130) adjacent to the cracker 100 or coupled to the absorption piping and discharge piping of the cracker 100.

[0090] The first valve 120 can adjust the flow rate of ammonia flowing in from an absorption pipe of the cracker 100. The second valve 130 can adjust the flow rates of hydrogen, nitrogen, and residual ammonia discharged from a discharge pipe of the cracker 100. The control unit 110 can control the pressure and heating temperature inside the cracker 100 by controlling the operation of at least one of the first valve 120 and the second valve 130.

[0091] According to an exemplary embodiment, when the residual ammonia inside the cracker 100 is equal to or greater than a preset amount, the control unit 110 can close at least one of the first valve 120 and the second valve 130. When the first valve 120 is closed, the reaction pressure and temperature inside the cracker 100 can be quickly adjusted. Furthermore, when the second valve 130 is closed, the reaction pressure and temperature inside the cracker 100 can be quickly adjusted.

[0092] As described above, the control unit 110 can create an environment that can promote the reaction inside the cracker 100 by combining the closed state or the open state of the first valve 120 and the second valve 130.

[0093] According to an exemplary embodiment, the ammonia decomposition system 10 includes a first valve 120 and a second valve 130 in the absorption and exhaust piping of the cracker 100, respectively, and the closing / opening and degree of each valve 120, 130 can be controlled.

[0094] The disclosed embodiments may be embodied in the form of a storage medium storing computer-executable instructions. The instructions may be stored in the form of program code, and a processor may generate program modules to perform the operations of the disclosed embodiments. The storage medium may be embodied in a computer-readable form.

[0095] The computer-readable storage medium may include any type of storage medium that stores computer-readable instructions, such as a read-only memory (ROM), a random access memory (RAM), a magnetic tape, a magnetic disk, a flash memory, an optical data storage device, etc.

[0096] As described above, the disclosed embodiments have been described with reference to the accompanying drawings. Those skilled in the art will understand that the present disclosure may be implemented in forms different from the disclosed embodiments without changing the technical idea or essential features of the present disclosure. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims

1. A cracker that decomposes ammonia to generate hydrogen, A heating unit that heats the cracker; a fuel cell that reacts the hydrogen to generate electricity; a bypass line connecting a pipe connecting the cracker and the fuel cell, and a pipe connecting the fuel cell and the heating unit; a sensing unit that senses the temperature inside the cracker; a control unit that receives temperature information inside the cracker and / or residual ammonia information inside the cracker from the sensing unit, The bypass line is a hydrogen supply pipe; a bypass valve for adjusting the hydrogen flow rate in the hydrogen supply pipe; The control unit an ammonia decomposition system that opens the bypass valve to control operation of the bypass line when the temperature inside the cracker is below a predetermined temperature and / or when residual ammonia inside the cracker is equal to or greater than a predetermined amount.

2. Further comprising an absorption section for absorbing residual ammonia discharged from the cracker; the absorption unit is located between a discharge pipe of the cracker and an absorption pipe of the fuel cell, an exhaust pipe of the cracker is provided by an absorption pipe of the absorption unit, and an absorption pipe of the fuel cell is provided by an exhaust pipe of the absorption unit; The bypass line is The exhaust pipe of the cracker or the absorption pipe of the absorption unit is connected to the exhaust pipe of the fuel cell, or 2. The ammonia decomposition system according to claim 1, wherein a discharge pipe of the absorption section or an absorption pipe of the fuel cell is connected to a discharge pipe of the fuel cell.

3. 3. The ammonia decomposition system according to claim 2, further comprising a separation membrane that allows permeation of the hydrogen and nitrogen among the hydrogen, nitrogen and residual ammonia discharged from the discharge pipe of the cracker.

4. a first valve for adjusting the flow rate of ammonia flowing in from an absorption pipe of the cracker; 3. The ammonia decomposition system of claim 2, further comprising: a second valve for adjusting the flow rate of hydrogen, nitrogen, and residual ammonia discharged from the discharge pipe of the cracker.

5. 5. The ammonia decomposition system of claim 4, wherein the control unit is configured to close at least one of the first valve and the second valve and control the pressure and elevated temperature inside the cracker when the residual ammonia inside the cracker is equal to or greater than a preset amount.

6. 6. The ammonia decomposition system according to claim 5, further comprising a pressurizing unit that adjusts the pressure inside the cracker.

7. 7. The ammonia decomposition system according to claim 6, wherein the control unit is configured to increase the pressure inside the cracker by the pressurizing unit when the residual ammonia inside the cracker is equal to or greater than a preset amount.

8. receiving temperature information inside the cracker from a sensing unit that senses the internal temperature of the cracker that decomposes ammonia to generate hydrogen; receiving residual ammonia information within the cracker; and controlling the operation of a bypass line connecting a pipe connecting the cracker and a fuel cell and a pipe connecting the fuel cell and a heating unit based on at least one of the temperature information and the residual ammonia information; the bypass line includes a hydrogen supply pipe and a bypass valve for adjusting the hydrogen flow rate of the hydrogen supply pipe; The step of controlling the operation of the bypass line includes the step of opening the bypass valve when the temperature inside the cracker is lower than a predetermined temperature and / or when the residual ammonia inside the cracker is equal to or greater than a predetermined amount.

Images