Ammonia fuel engine aftertreatment system and marine vessel

Abstract

The application provides an ammonia fuel engine aftertreatment system and a ship. The ship has an ammonia fuel storage cabin and an ammonia fuel engine. The ammonia fuel engine aftertreatment system comprises a first treatment channel, a second treatment channel and an ammonia gas supply channel. The first treatment channel and the second treatment channel are both located downstream of the ammonia fuel engine and connected to the ammonia fuel engine. The ammonia gas supply channel is connected to the second treatment channel and the ammonia fuel storage cabin respectively to supply ammonia gas to the second treatment channel. In the case that the ammonia gas concentration in the exhaust gas discharged by the ammonia fuel engine is higher than the NOx concentration, the ammonia fuel engine is communicated with the first treatment channel; in the case that the ammonia gas concentration in the exhaust gas discharged by the ammonia fuel engine is lower than the NOx concentration, the ammonia fuel engine is communicated with the second treatment channel. According to the ammonia fuel engine aftertreatment system, the ammonia fuel storage cabin in the ship can be directly used, so that the ammonia fuel engine aftertreatment system occupies a small space and is arranged more flexibly.

Description

Technical Field

[0001] This application relates generally to the field of exhaust gas treatment, and more specifically to an aftertreatment system for an ammonia fuel engine and a ship. Background Technology

[0002] Ammonia-fueled engines are internal combustion engines that burn pure ammonia, a mixture of ammonia and diesel, ammonia and hydrogen, or ammonia with other fuels. Because ammonia is the primary fuel, its combustion products are green and low-carbon. Ammonia, as a gas that can be synthesized artificially at low cost, has high energy density, is easily liquefied and stored, and is convenient to transport. Its combustion does not produce carbon dioxide, making it suitable as an alternative fuel for engine combustion. It can also be used as a raw material for hydrogen production through decomposition and as a catalytic reduction gas in aftertreatment systems. Using hydrogen produced from ammonia cracking in the engine can improve ammonia combustion, increase combustion thermal efficiency, and reduce emissions of pollutants such as nitrogen oxides from ammonia combustion. Furthermore, ammonia acts as a reducing agent in aftertreatment, catalytically reducing nitrogen oxides in exhaust gases. The marine engine market is vast, and the potential demand for ammonia-fueled engines is strong. However, existing ammonia-fueled engine aftertreatment systems require dedicated ammonia fuel supply units, which are space-consuming, complex in connection, and difficult to control flexibly, resulting in suboptimal exhaust gas treatment.

[0003] Therefore, there is a need to provide an ammonia fuel engine aftertreatment system and a vessel to at least partially solve the above problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially address the aforementioned problems, a first aspect of this application provides an ammonia fuel engine aftertreatment system for a ship, the ship having an ammonia fuel tank and an ammonia fuel engine, the ammonia fuel engine aftertreatment system comprising:

[0006] A first processing channel is located downstream of and connected to the ammonia fuel engine;

[0007] A second processing channel, located downstream of and connected to the ammonia fuel engine; and

[0008] An ammonia supply channel is provided, which is connected to the second processing channel and the ammonia fuel storage tank respectively, to supply ammonia to the second processing channel.

[0009] Wherein, if the ammonia concentration in the exhaust gas discharged from the ammonia fuel engine is higher than the NOx concentration, the ammonia fuel engine is connected to the first processing channel; if the ammonia concentration in the exhaust gas discharged from the ammonia fuel engine is lower than the NOx concentration, the ammonia fuel engine is connected to the second processing channel.

[0010] Optionally, the ammonia fuel engine aftertreatment system further includes an aftertreatment reactor having a first inlet, and the end of the first treatment channel away from the ammonia fuel engine is connected to the first inlet.

[0011] Optionally, the ammonia fuel engine aftertreatment system further includes an aftertreatment reactor, with one end of the second treatment channel away from the ammonia fuel engine connected to the aftertreatment reactor.

[0012] Optionally, the post-treatment reactor is constructed as a single unit; and / or

[0013] The interior of the aftertreatment reactor includes a first SCR catalyst layer, an ASC catalyst layer, and a second SCR catalyst layer arranged sequentially and connected along the exhaust gas emission direction.

[0014] Optionally, the ammonia fuel engine aftertreatment system further includes a mixer located downstream of the ammonia supply channel, the mixer having a first inlet and a first outlet in communication with each other, and the second treatment channel being connected to the first inlet and the first outlet;

[0015] The mixer also includes a second inlet connected to the first outlet, and the end of the ammonia supply channel away from the ammonia fuel tank is connected to the second inlet.

[0016] Optionally, the first treatment channel is provided with an aftertreatment reactor. The interior of the aftertreatment reactor includes a first SCR catalyst layer, an ASC catalyst layer, and a second SCR catalyst layer arranged sequentially along the exhaust emission direction. The aftertreatment reactor has a bypass inlet communicating with the outside. The bypass inlet is located between the ASC catalyst layer and the second SCR catalyst layer. The end of the second treatment channel away from the ammonia fuel engine is connected to the bypass inlet.

[0017] Optionally, the aftertreatment reactor has a first inlet and a first outlet that are interconnected along the exhaust gas emission direction, the first inlet being located upstream of the first SCR catalyst layer and the first outlet being located downstream of the second SCR catalyst layer.

[0018] Optionally, the ammonia fuel engine aftertreatment system further includes an exhaust gas discharge passage located downstream of the aftertreatment reactor and connected to the first outlet.

[0019] Optionally, the ammonia supply channel includes:

[0020] The first ammonia supply pipeline is connected to the ammonia fuel storage tank;

[0021] A second ammonia supply pipeline, the second ammonia supply pipeline being connected to the second processing channel; and

[0022] A control component is located between the first ammonia supply pipeline and the second ammonia supply pipeline, and the control component is connected to the first ammonia supply pipeline and the second ammonia supply pipeline respectively.

[0023] Optionally, the control component includes a pressure control component, an ammonia buffer component, and an ammonia flow regulation component arranged sequentially and interconnected along the ammonia delivery direction.

[0024] Optionally, the ammonia fuel engine aftertreatment system further includes a purge and venting assembly connected to at least one of the pressure regulating component, the ammonia buffer component, and the ammonia flow regulating component.

[0025] Optionally, the purge and vent assembly includes:

[0026] Gas generating components;

[0027] A purge gas supply line, the purge gas supply line being connected to the gas generating component and the control assembly; and

[0028] A gas venting line is located downstream of and connected to the control component, and is used to vent the purged gas to the external environment.

[0029] Optionally, the purge gas supply pipeline is further provided with a flow control component to control the flow rate of the purge gas supply.

[0030] A second aspect of this application provides a vessel, said vessel comprising:

[0031] Ammonia fuel storage tanks; and

[0032] According to the ammonia fuel engine aftertreatment system of the first aspect of this application, the ammonia fuel engine aftertreatment system is connected to the ammonia fuel storage tank.

[0033] The ammonia fuel engine aftertreatment system according to this application can directly utilize the ammonia fuel storage tank in the ship, making the structure of the ammonia fuel engine aftertreatment system simple, occupying little space, and more flexible in layout, making full use of ammonia fuel ship resources and requiring less resources. Attached Figure Description

[0034] The following drawings, which illustrate embodiments of this application, are incorporated herein by reference and are used to understand this application. The drawings depict embodiments of this application and their descriptions, serving to explain the principles of this application. In the drawings,

[0035] Figure 1 This is a partial schematic diagram of an ammonia fuel engine aftertreatment system according to a preferred embodiment of this application, showing the connection between the ammonia fuel engine and a first treatment channel and a second treatment channel; and

[0036] Figure 2 for Figure 1 Another partial schematic diagram of the ammonia fuel engine aftertreatment system is shown, illustrating the regulation and purging process of the ammonia supply channel.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 Ammonia Fuel Engine Aftertreatment System

[0039] 110 Ammonia Fuel Engine

[0040] 120 First Processing Channel

[0041] 130 Second Processing Channel

[0042] 131 Mixer

[0043] 132 First Access Point

[0044] 133 Second Access Point

[0045] 134 First row exit

[0046] 140 Ammonia Supply Channel

[0047] 141 First Ammonia Supply Pipeline

[0048] 142 Second Ammonia Supply Pipeline

[0049] 150 Post-treatment reactor

[0050] 151 First SCR catalyst layer

[0051] 152 ASC catalyst layer

[0052] 153 Second SCR catalyst layer

[0053] 154 Exhaust Gas Exhaust Channel

[0054] 155 Bypass Import

[0055] 156 First Import

[0056] 157 First Exit

[0057] 160 control components

[0058] 161 Pressure regulating component

[0059] 162 Ammonia Buffer Component

[0060] 163 Ammonia Flow Regulation Component

[0061] 170 Purge and Discharge Assembly

[0062] 171 Gas generating component

[0063] 172 Purge gas supply line

[0064] 173 Gas venting pipeline

[0065] 174 Flow control components

[0066] 175 Purge gas discharge pipeline Detailed Implementation

[0067] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0068] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art.

[0069] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0070] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0071] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0072] This application provides a vessel including an ammonia-fueled engine, an ammonia fuel tank, and an ammonia-fueled engine aftertreatment system. The ammonia-fueled engine aftertreatment system is connected to the ammonia fuel tank.

[0073] Please see Figure 1 The ammonia fuel engine aftertreatment system 100 is used in ships. The ammonia fuel engine aftertreatment system 100 includes a first treatment channel 120, a second treatment channel 130, and an ammonia supply channel 140. Specifically, the first treatment channel 120 is located downstream of and connected to the ammonia fuel engine 110. The second treatment channel 130 is located downstream of and connected to the ammonia fuel engine 110. The ammonia supply channel 140 is connected to both the second treatment channel 130 and the ammonia fuel tank to supply ammonia to the second treatment channel 130. It should be noted that the ammonia concentration in the exhaust gas from the ammonia fuel engine 110 is higher than that of NO. X Under conditions of (Nitrogen Oxides) concentration, the ammonia fuel engine 110 is connected to the first processing channel 120; when the ammonia concentration in the exhaust gas discharged from the ammonia fuel engine 110 is lower than that of NO... X At certain concentrations, the ammonia fuel engine 110 is connected to the second processing channel 130.

[0074] The ammonia fuel engine aftertreatment system 100 according to this application can directly utilize the ammonia gas in the ammonia fuel tank of the ship, making the ammonia fuel engine aftertreatment system 100 simple in structure, occupying little space, and more flexible in layout, making full use of ammonia fuel ship resources and requiring less resources.

[0075] Furthermore, the ammonia fuel engine aftertreatment system 100 also includes an aftertreatment reactor 150. The aftertreatment reactor 150 has a first inlet 156, and a first treatment channel 120, located away from the ammonia fuel engine 110, is connected to the first inlet 156. A second treatment channel 130, located away from the ammonia fuel engine 110, is connected to the aftertreatment reactor 150. The interior of the aftertreatment reactor 150 includes a first SCR (Selective Catalytic Reduction) catalyst layer 151, an ASC (Ammonia Selective Catalysis) catalyst layer 152, and a second SCR catalyst layer 153, arranged sequentially and interconnected along the exhaust emission direction. Preferably, the aftertreatment reactor 150 is constructed as a single unit. It should be noted that the aftertreatment reactor 150 also has a first outlet 157. The first inlet 156 and the first outlet 157 are interconnected along the exhaust emission direction. Specifically, the first inlet 156 is located upstream of the first SCR catalyst layer 151, and the first outlet 157 is located downstream of the second SCR catalyst layer. The ammonia fuel engine aftertreatment system 100 also includes an exhaust gas outlet 154, which is located downstream of the aftertreatment reactor 150 and connected to a first outlet 157. The ammonia concentration in the exhaust gas from the ammonia fuel engine 110 is higher than that of NO. X Under certain concentration conditions, the flow sequence of the exhaust gas is as follows: ammonia fuel engine 110 - first treatment channel 120 - first inlet 156 - first SCR catalyst layer 151 - ASC catalyst layer 152 - second SCR catalyst layer 153 - first outlet 157 - exhaust gas discharge channel 154. Temperature sensors, pressure sensors, and sampling ports are installed at both ends of the aftertreatment reactor 150 to analyze pollutant concentrations, flue gas temperature, and pressure drop. The exhaust gas flow is controlled by valves. For example, if the ammonia concentration required to treat NOx is A, and the ammonia concentration in the exhaust gas is higher than A (i.e., the ammonia concentration in the exhaust gas is higher than the NOx concentration), the exhaust gas flow will be controlled by valves. X (At the given concentration), the exhaust gas sequentially passes through the first SCR catalyst layer 151, the ASC catalyst layer 152, and the second SCR catalyst layer 153. The first SCR catalyst layer 151 catalyzes the reaction of ammonia and NO. X In the reaction, the ASC catalyst layer 152 removes excess ammonia from the exhaust gas, and the second SCR catalyst layer 153 further removes residual NO. X .

[0076] Please continue reading. Figure 1The ammonia fuel engine aftertreatment system 100 also includes a mixer 131. The mixer 131 is located downstream of the ammonia supply channel 140 and has a first inlet 132 and a first outlet 134 communicating with each other. A second treatment channel 130 is connected to the first inlet 132 and the first outlet 134. Furthermore, the mixer 131 also includes a second inlet 133 communicating with the first outlet 134, and the end of the ammonia supply channel 140 away from the ammonia fuel tank is connected to the second inlet 133. It should be noted that the aftertreatment reactor 150 has a bypass inlet 155 communicating with the outside. The bypass inlet 155 is located between the ASC catalyst layer 152 and the second SCR catalyst layer 153, and the end of the second treatment channel 130 away from the ammonia fuel engine 110 is connected to the bypass inlet 155. As described above, the aftertreatment reactor 150 is equipped with temperature sensors, pressure sensors, and sampling ports at both its front and rear ends for analyzing pollutant concentrations and flue gas temperature and pressure drop. The exhaust gas flow is controlled by valves. The ammonia concentration required to treat NOx is A. If the ammonia concentration is less than or equal to A (i.e., the ammonia concentration in the exhaust gas is lower than the NOx concentration), the exhaust gas will be affected. X (At the given concentration), the exhaust gas and ammonia from the ammonia supply channel 140 are mixed in the mixer 131, and then only pass through the second SCR catalyst layer 153. The ammonia and NO... X The reaction. In other words, the concentration of ammonia in the exhaust gas is lower than that of NO. X Under certain concentration conditions, the flow sequence of the exhaust gas is as follows: ammonia fuel engine 110 - second treatment channel 130 - mixer 131 - second treatment channel 130 - bypass inlet 155 - second SCR catalyst layer 153 - first outlet 157 - exhaust gas discharge channel 157. It should be noted that the ammonia concentration in the exhaust gas is lower than that of NO. X At certain concentrations, ammonia supply channel 140 needs to be supplemented with a portion of ammonia and NO. X The reaction is carried out using ammonia gas supplied from the ship's ammonia fuel tanks. In other words, the ammonia fuel tanks supply fuel to the ship's ammonia fuel engine 110, and also supply ammonia gas for the exhaust aftertreatment process of the ammonia fuel engine 110.

[0077] Please see Figure 2 The following is a description of ammonia supply channel 140.

[0078] The ammonia supply channel 140 includes a first ammonia supply pipeline 141, a second ammonia supply pipeline 142, and a control assembly 160. The first ammonia supply pipeline 141 is connected to the ammonia fuel storage tank. The second ammonia supply pipeline 142 is connected to the second processing channel 130. Specifically, in conjunction with... Figure 1The second ammonia supply line 142 is connected to the mixer 131. The control assembly 160 is located between the first ammonia supply line 141 and the second ammonia supply line 142, and the control assembly 160 is connected to the first ammonia supply line 141 and the second ammonia supply line 142 respectively.

[0079] It should be noted that the control component 160 is used at least to regulate the pressure and flow rate during the ammonia supply process to ensure a smooth ammonia flow. Preferably, the control component 160 includes a pressure control component 161, an ammonia buffer component 162, and an ammonia flow regulating component 163 arranged sequentially and interconnected along the ammonia delivery direction. It is understood that the front end of the first ammonia supply pipeline 141 is connected to the ammonia fuel storage tank, and the rear end is connected to the pressure control component 161. The ammonia drawn from the ammonia fuel storage tank is pressurized to a set pressure range by the pressure control component 161. The end of the pressure control component 161 away from the first ammonia supply pipeline 141 is connected to the ammonia buffer component 162, which is, for example, an ammonia buffer tank used to temporarily store ammonia and maintain a stable supply pressure at its rear end. The ammonia buffer tank is equipped with a pressure sensor and a temperature sensor. The end of the ammonia buffer component 162 away from the pressure control component 161 is connected to the ammonia flow regulating component 163, which is, for example, an ammonia flow regulating cabinet. The ammonia flow control cabinet is used to receive the operating signal of the ammonia fuel engine 110 and the concentration of pollutants in the exhaust gas, and to adjust the ammonia flow rate in real time. The ammonia flow control cabinet may be equipped with one or more flow control units to match one or more after-treatment reactors 150. In order to improve the reaction effect of ammonia and exhaust gas, the second ammonia supply pipeline 142 may be constructed as an injection pipeline. For example, the second ammonia supply pipeline 142 is equipped with an injection device (e.g., a spray gun) that injects ammonia into the mixer 131.

[0080] Please continue reading. Figure 2Furthermore, the ammonia fuel engine aftertreatment system 100 also includes a purge and vent assembly 170, which is connected to at least one of the pressure regulating component 161, the ammonia buffer component 162, and the ammonia flow regulating component 163. Specifically, the purge and vent assembly 170 includes a gas generating component 171, a purge gas supply line 172, and a gas venting line 173. The purge gas supply line 172 is connected to the gas generating component 171 and the regulating component 160. The gas generating component 171 is configured, for example, as a nitrogen generator. The gas venting line 173 is located downstream of and connected to the regulating component 160, and is used to vent at least the purge gas to the external environment. Preferably, the pressure regulating component 161, the ammonia buffer component 162, and the ammonia flow regulating component 163 are all connected to the purge and vent assembly 170, and the purge gas is collected in the purge gas discharge line 175 and then discharged. In order to control the flow rate of the purge gas, the purge gas supply line 172 is also equipped with a flow control component 174.

[0081] The following is a brief description of the gas purging process.

[0082] For equipment requiring gas purging, the gas generating component 171 generates the gas to be purged. After the flow rate is regulated by the flow control component 174, the gas is delivered to the control assembly 160 (at least one of the pressure control component 161, the ammonia buffer component 162, and the ammonia flow regulating component 163), thereby venting the ammonia in the control assembly 160 and corresponding pipelines during equipment maintenance and repair. The purging gas is collected in the purging gas discharge pipeline 175 and then discharged. It is understood that for equipment that does not require purging during maintenance and repair, the gas generating component 171 is not connected to it.

[0083] According to the ammonia fuel engine aftertreatment system of this application, ammonia gas is used as a reducing agent, eliminating the need for urea solution and solving the problem of easy crystallization and nozzle blockage in the exhaust gas flow pipeline, resulting in high system reliability. Since the second treatment channel is directly connected to the ship's onboard ammonia fuel storage tank, the ammonia fuel engine aftertreatment system has a simple structure, occupies little space, and allows for more flexible layout, making full use of ammonia fuel resources and requiring fewer resources. Furthermore, this application utilizes injection equipment to directly inject ammonia gas into the mixer, enabling the ammonia fuel to vaporize at an extremely high speed and react with the exhaust gas under the action of a catalyst layer inside the aftertreatment reactor, significantly improving the system's response speed. In addition, this application integrates multiple catalyst layers into the same aftertreatment reactor, resulting in a high degree of system integration and reducing heat and pressure losses in the pipeline.

[0084] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0085] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. An ammonia fuel engine aftertreatment system for a ship, the ship having an ammonia fuel tank and an ammonia fuel engine, characterized in that, The post-processing system includes: A first processing channel is located downstream of and connected to the ammonia fuel engine. The first processing channel is equipped with an aftertreatment reactor. The interior of the aftertreatment reactor includes a first SCR catalyst layer, an ASC catalyst layer, and a second SCR catalyst layer arranged sequentially along the exhaust emission direction. The aftertreatment reactor has a bypass inlet communicating with the outside. The bypass inlet is located between the ASC catalyst layer and the second SCR catalyst layer. A second processing channel, located downstream of and connected to the ammonia fuel engine, has its end away from the ammonia fuel engine connected to the bypass inlet; and An ammonia supply channel is provided, which is connected to the second processing channel and the ammonia fuel storage tank respectively, to supply ammonia to the second processing channel. The aftertreatment system also includes a mixer located downstream of the ammonia supply channel, the second treatment channel being connected to the mixer, and the end of the ammonia supply channel away from the ammonia fuel tank being connected to the mixer; Wherein, if the ammonia concentration in the exhaust gas discharged from the ammonia fuel engine is higher than the NOx concentration, the ammonia fuel engine is connected to the first processing channel; if the ammonia concentration in the exhaust gas discharged from the ammonia fuel engine is lower than the NOx concentration, the ammonia fuel engine is connected to the second processing channel.

2. The ammonia fuel engine aftertreatment system according to claim 1, characterized in that, The aftertreatment reactor has a first inlet, and the end of the first treatment channel away from the ammonia fuel engine is connected to the first inlet.

3. The ammonia fuel engine aftertreatment system according to claim 1 or 2, characterized in that, The post-treatment reactor is constructed as a single unit.

4. The ammonia fuel engine aftertreatment system according to claim 1, characterized in that, The mixer has a first inlet and a first outlet that are interconnected, and the second processing channel is connected to the first inlet and the first outlet. The mixer also includes a second inlet connected to the first outlet, and the end of the ammonia supply channel away from the ammonia fuel tank is connected to the second inlet.

5. The ammonia fuel engine aftertreatment system according to claim 4, characterized in that, The aftertreatment reactor has a first inlet and a first outlet that are interconnected along the exhaust gas emission direction. The first inlet is located upstream of the first SCR catalyst layer, and the first outlet is located downstream of the second SCR catalyst layer.

6. The ammonia fuel engine aftertreatment system according to claim 5, characterized in that, The ammonia fuel engine aftertreatment system also includes an exhaust gas discharge channel located downstream of the aftertreatment reactor and connected to the first outlet.

7. The ammonia fuel engine aftertreatment system according to claim 1, characterized in that, The ammonia supply channel includes: The first ammonia supply pipeline is connected to the ammonia fuel storage tank. A second ammonia supply pipeline, the second ammonia supply pipeline being connected to the second processing channel; and A control component is located between the first ammonia supply pipeline and the second ammonia supply pipeline, and the control component is connected to the first ammonia supply pipeline and the second ammonia supply pipeline respectively.

8. The ammonia fuel engine aftertreatment system according to claim 7, characterized in that, The control components include a pressure control component, an ammonia buffer component, and an ammonia flow regulation component arranged sequentially and interconnected along the ammonia delivery direction.

9. The ammonia fuel engine aftertreatment system according to claim 8, characterized in that, The ammonia fuel engine aftertreatment system further includes a purging and venting assembly connected to at least one of the pressure regulating component, the ammonia buffer component, and the ammonia flow regulating component.

10. The ammonia fuel engine aftertreatment system according to claim 9, characterized in that, The purge and discharge assembly includes: Gas generating components; A purge gas supply line, the purge gas supply line being connected to the gas generating component and the control assembly; and A gas venting line is located downstream of and connected to the control component, and is used to vent the purged gas to the external environment.

11. The ammonia fuel engine aftertreatment system according to claim 10, characterized in that, The purging gas supply pipeline is also equipped with a flow control component to control the flow rate of the purging gas supply.

12. A ship, characterized in that, The vessels include: Ammonia fuel storage tanks; and The ammonia fuel engine aftertreatment system according to any one of claims 1 to 11, wherein the ammonia fuel engine aftertreatment system is connected to the ammonia fuel storage tank.

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