Ammonia-hydrogen engine system and ammonia-hydrogen engine starting method
The ammonia-hydrogen engine system addresses the ignition challenge by using hydrogen-nitrogen gas to start the engine and later introduces ammonia gas, effectively reducing startup difficulties and enhancing engine performance.
Patent Information
- Application Number
- CN202510266855.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-07-15
AI Technical Summary
The existing ammonia hydrogen engines are difficult to start, mainly because ammonia is not easy to ignite, which makes it difficult to start.
The hydrogen and nitrogen storage tank and hydrogen production module are connected to the engine. After the engine is ignited by hydrogen and nitrogen, the engine is started, and ammonia is used to increase the engine load, and ammonia is introduced when the temperature of the hydrogen production module reaches the preset value. Hydrogen and nitrogen are recovered when the engine is shut down.
It reduces engine start difficulty, improves startup success rate, and increases energy utilization and engine load.
Smart Images
Figure CN120312399A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of ammonia-hydrogen engines, and in particular, to an ammonia-hydrogen engine system and an ammonia-hydrogen engine starting method. Background Art
[0002] An ammonia-hydrogen engine is a new type of internal combustion engine that uses ammonia and hydrogen as fuels and can reduce carbon emissions.
[0003] However, ammonia is not easily ignited, and it is difficult to start the engine by igniting ammonia, resulting in difficulty in starting the engines in the prior art. Summary of the Invention
[0004] The purpose of this application is to at least solve the problem that it is difficult to start the engine in the prior art. This purpose is achieved in the following ways:
[0005] In the first aspect, this application proposes an ammonia-hydrogen engine system that can reduce the difficulty of starting the engine.
[0006] In the second aspect, this application proposes an ammonia-hydrogen engine starting method.
[0007] The ammonia-hydrogen engine system of this application includes an engine, an ammonia device, and a hydrogen-nitrogen device. The ammonia device is connected to the engine in a switchable manner. The hydrogen-nitrogen device includes a hydrogen-nitrogen storage tank and a hydrogen production component. The hydrogen-nitrogen storage tank is connected to the engine in a switchable manner, the hydrogen production component is connected to the engine in a switchable manner, and is connected to the hydrogen-nitrogen storage tank in a switchable manner. Wherein, the hydrogen-nitrogen storage tank is used to introduce hydrogen-nitrogen into the engine when starting the engine, the ammonia device is used to introduce ammonia into the engine after the engine is started, and is used to introduce ammonia into the hydrogen production component when the temperature of the hydrogen production component reaches a preset value. After the engine is started, the hydrogen production component is used to introduce hydrogen-nitrogen into the engine when the temperature reaches the preset value, and is used to introduce hydrogen-nitrogen into the hydrogen-nitrogen storage tank after the engine stops.
[0008] In the ammonia-hydrogen engine system according to the embodiment of this application, when starting the engine, the hydrogen-nitrogen storage tank introduces hydrogen-nitrogen into the engine. Since hydrogen is a flammable gas, the engine is ignited and started by the hydrogen-nitrogen, which can reduce the difficulty of starting the engine.
[0009] In some embodiments of the present application, the engine further includes an intake manifold, an exhaust manifold, and a combustion chamber. The intake manifold and the exhaust manifold are both in communication with the combustion chamber. The ammonia device, the hydrogen-nitrogen gas storage tank, and the hydrogen production assembly are all connected to the combustion chamber through the intake manifold. The exhaust manifold is connected to the hydrogen production assembly to be able to heat the hydrogen production assembly. The hydrogen-nitrogen gas device further includes a first pipeline, a second pipeline, and a third pipeline. The first pipeline is connected to the hydrogen-nitrogen gas storage tank in a switchable manner. The second pipeline is connected to the intake manifold in a switchable manner. The third pipeline is connected to the hydrogen production assembly. The first pipeline, the second pipeline, and the third pipeline are connected to each other pairwise.
[0010] In some embodiments of the present application, a first valve body is provided on the first pipeline. A second valve body and a first injection valve are provided on the second pipeline. The first injection valve is used to inject hydrogen-nitrogen gas into the intake manifold after the second valve body is opened. The hydrogen-nitrogen gas device further includes a heat exchanger and a filter, and both the heat exchanger and the filter are provided on the third pipeline.
[0011] In some embodiments of the present application, the ammonia device is connected to the intake manifold through a fourth pipeline. The hydrogen production assembly is connected to the fourth pipeline through a fifth pipeline, and a third valve body is provided on the fifth pipeline.
[0012] In some embodiments of the present application, the hydrogen production assembly includes an ammonia reaction hydrogen production device and a heater. The heater is provided in the ammonia reaction hydrogen production device. The third pipeline and the fifth pipeline are both connected to the ammonia reaction hydrogen production device. The ammonia reaction hydrogen production device is provided in the exhaust manifold.
[0013] In some embodiments of the present application, the ammonia device includes a liquid ammonia tank, a liquid ammonia pump, and a liquid ammonia vaporizer. The liquid ammonia tank is connected to the liquid ammonia vaporizer through the liquid ammonia pump. The cooling water of the engine is connected to the liquid ammonia vaporizer through a sixth pipeline for heat exchange with the liquid ammonia in the liquid ammonia vaporizer. The liquid ammonia vaporizer is connected to the fourth pipeline, and a control valve is provided on the sixth pipeline.
[0014] In some embodiments of the present application, a fourth valve body and a second injection valve are provided on the fourth pipeline. The second injection valve is used to inject ammonia into the intake manifold after the fourth valve body is opened. A pressure sensor is provided on the hydrogen-nitrogen gas storage tank. The hydrogen production assembly further includes a temperature sensor, and the temperature sensor is provided in the ammonia reaction hydrogen production device.
[0015] The ammonia-hydrogen engine starting method of the second aspect of the present application is applied to the ammonia-hydrogen engine system as described in the first aspect above. The ammonia-hydrogen engine starting method includes:
[0016] In response to the start signal of the engine, connect the hydrogen-nitrogen gas storage tank to the engine, and introduce the hydrogen-nitrogen gas in the hydrogen-nitrogen gas storage tank into the engine;
[0017] Control the ignition of the engine, and obtain and judge the starting state of the engine;
[0018] According to the successful start of the engine, connect the ammonia device to the engine, and introduce the ammonia in the ammonia device into the engine.
[0019] For the ammonia-hydrogen engine starting method of the present application, when receiving the start signal of the engine, control the connection between the hydrogen-nitrogen gas storage tank and the engine, so that the hydrogen-nitrogen gas in the hydrogen-nitrogen gas storage tank can enter the engine, control the ignition of the engine to ignite the hydrogen-nitrogen gas in the engine, thereby starting the engine. When the engine starts successfully, control the connection between the ammonia device and the engine, and introduce the mixture of ammonia and hydrogen-nitrogen gas into the engine, thereby increasing the load of the engine.
[0020] In some embodiments of the present application, after making the ammonia device communicate with the engine and introducing the ammonia in the ammonia device into the engine according to the successful start of the engine, the ammonia-hydrogen engine starting method further includes:
[0021] Obtain the temperature of the hydrogen production component, and compare the temperature of the hydrogen production component with a preset value;
[0022] According to the temperature of the hydrogen production component being greater than or equal to the preset value, disconnect the connection between the hydrogen-nitrogen gas storage tank and the engine, connect the hydrogen production component and the engine, and connect the ammonia device and the hydrogen production component.
[0023] In some embodiments of the present application, the ammonia-hydrogen engine starting method further includes:
[0024] In response to the shutdown signal of the engine, disconnect the connection between the hydrogen production component and the engine, and connect the hydrogen production component and the hydrogen-nitrogen gas storage tank;
[0025] Obtain the pressure in the hydrogen-nitrogen gas storage tank, and compare the pressure of the hydrogen-nitrogen gas storage tank with a preset pressure;
[0026] According to the pressure of the hydrogen-nitrogen gas storage tank being greater than or equal to the preset pressure, disconnect the connection between the hydrogen production component and the hydrogen-nitrogen gas storage tank, disconnect the connection between the ammonia device and the engine, and disconnect the connection between the ammonia device and the hydrogen production component. Description of the Drawings
[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Also, throughout the drawings, the same reference numerals are used to denote the same components. Wherein:
[0028] Figure 1 is a schematic diagram of an ammonia-hydrogen engine system according to some embodiments of the present application;
[0029] Figure 2 is a partial schematic diagram of an ammonia engine system according to some embodiments of the present application;
[0030] Figure 3 is a flowchart of a method for starting an ammonia-hydrogen engine according to some embodiments of the present application.
[0031] The reference numerals in the drawings are represented as follows:
[0032] 100, ammonia-hydrogen engine system;
[0033] 1, engine; 11, intake manifold; 12, combustion chamber; 13, exhaust manifold; 14, cylinder block; 15, cylinder head; 151, intake port; 152, exhaust port; 16, spark plug; 17, piston;
[0034] 2, hydrogen-nitrogen gas device; 21, hydrogen-nitrogen gas storage tank; 211, pressure sensor; 22, hydrogen production component; 221, ammonia reaction hydrogen production device; 222, heater; 223, temperature sensor; 23, heat exchanger; 24, filter;
[0035] 3, ammonia gas device; 31, liquid ammonia tank; 32, liquid ammonia pump; 33, liquid ammonia vaporizer;
[0036] 4, post-treatment device;
[0037] a, first pipeline; b, second pipeline; c, third pipeline; d, fourth pipeline; e, fifth pipeline; f, first valve body; g, second valve body; h, first injection valve; i, third valve body; j, fourth valve body; k, second injection valve; m, sixth pipeline. Detailed Embodiments
[0038] The exemplary embodiments of the present application will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be fully conveyed to those skilled in the art.
[0039] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.
[0040] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0041] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is rotated, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.
[0042] In the description of the application, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present application.
[0043] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0044] An ammonia-hydrogen engine is a new type of internal combustion engine. The ammonia-hydrogen engine uses ammonia and hydrogen as fuels and can reduce carbon emissions.
[0045] In the prior art, hydrogen is prepared from ammonia in an ammonia-hydrogen engine system. The hydrogen is mixed with ammonia and introduced into the engine for combustion. When the engine starts, hydrogen is not prepared in the engine system. Therefore, ammonia is needed to start the engine. However, ammonia is not easy to ignite, and it is difficult to start the engine by igniting ammonia, resulting in difficulty in starting the engine in the prior art.
[0046] In order to at least solve the problem that the engine in the prior art is difficult to start, an embodiment of the present application proposes an ammonia-hydrogen engine system 100, which can reduce the starting difficulty of the engine.
[0047] An embodiment of the present application also proposes an engine starting method applied to the ammonia-hydrogen engine system 100 as described in the above embodiment.
[0048] The ammonia-hydrogen engine system 100 and the engine starting method of the embodiments of the present application will be described below with reference to the drawings.
[0049] As Figure 1 and Figure 2As shown in the figure, the ammonia-hydrogen engine system 100 of the embodiment of the present application includes an engine 1, an ammonia device 3, and a hydrogen-nitrogen device 2. The ammonia device 3 is connected to the engine 1 in a switchable manner. The hydrogen-nitrogen device 2 includes a hydrogen-nitrogen storage tank 21 and a hydrogen production component 22. The hydrogen-nitrogen storage tank 21 is connected to the engine 1 in a switchable manner. The hydrogen production component 22 is connected to the engine 1 in a switchable manner and is connected to the hydrogen-nitrogen storage tank 21 in a switchable manner. Among them, the hydrogen-nitrogen storage tank 21 is used to introduce hydrogen-nitrogen into the engine 1 when the engine 1 starts. The ammonia device 3 is used to introduce ammonia into the engine 1 after the engine 1 starts and is used to introduce ammonia into the hydrogen production component 22 when the temperature of the hydrogen production component 22 reaches a preset value. After the engine 1 starts, the hydrogen production component 22 is used to introduce hydrogen-nitrogen into the engine 1 when the temperature reaches the preset value and is used to introduce hydrogen-nitrogen into the hydrogen-nitrogen storage tank 21 after the engine 1 stops.
[0050] Hydrogen-nitrogen refers to a mixed gas of hydrogen and nitrogen. When hydrogen is prepared from ammonia, ammonia decomposes into hydrogen and nitrogen, and hydrogen and nitrogen are mixed to form hydrogen-nitrogen. Hydrogen is a colorless, odorless, and flammable gas, and hydrogen has strong reducibility. Nitrogen is a colorless, odorless, and relatively chemically stable gas. After hydrogen-nitrogen is introduced into the engine 1, the hydrogen in the hydrogen-nitrogen participates in the combustion reaction in the engine 1.
[0051] When the engine 1 starts, the hydrogen-nitrogen storage tank 21 introduces hydrogen-nitrogen into the engine 1. Since hydrogen is a flammable gas, the engine 1 can be ignited and started by hydrogen-nitrogen, which can reduce the difficulty of starting the engine 1.
[0052] After the engine 1 starts and when the temperature of the hydrogen production component 22 has not reached the preset value, the hydrogen-nitrogen storage tank 21 continues to introduce hydrogen-nitrogen into the engine 1, and the ammonia device 3 introduces ammonia into the engine 1, thereby increasing the load of the engine 1.
[0053] When the temperature of the hydrogen production component 22 reaches the preset value, the ammonia device 3 introduces ammonia into the hydrogen production component 22. The hydrogen production component 22 prepares hydrogen-nitrogen from ammonia and provides hydrogen-nitrogen to the engine 1.
[0054] After the engine 1 stops, the hydrogen production component 22 introduces hydrogen-nitrogen into the hydrogen-nitrogen storage tank 21 to supplement the hydrogen-nitrogen in the hydrogen-nitrogen storage tank 21 so that the hydrogen-nitrogen storage tank 21 can provide hydrogen-nitrogen to the engine 1 when the engine 1 starts.
[0055] As some examples, the preset value is 350 °C.
[0056] Such as Figure 2As shown, in some embodiments, the engine 1 further includes an intake manifold 11, an exhaust manifold 13, and a combustion chamber 12. The intake manifold 11 and the exhaust manifold 13 are both in communication with the combustion chamber 12. The ammonia device 3, the hydrogen-nitrogen gas storage tank 21, and the hydrogen production component 22 are all connected to the combustion chamber 12 through the intake manifold 11, and the exhaust manifold 13 is connected to the hydrogen production component 22 to be able to heat the hydrogen production component 22.
[0057] The hydrogen-nitrogen gas device 2 further includes a first pipeline a, a second pipeline b, and a third pipeline c. The first pipeline a is connected to the hydrogen-nitrogen gas storage tank 21 in a switchable manner, the second pipeline b is connected to the intake manifold 11 in a switchable manner, the third pipeline c is connected to the hydrogen production component 22, and the first pipeline a, the second pipeline b, and the third pipeline c are connected to each other pairwise. That is to say, the hydrogen-nitrogen gas storage tank 21 and the intake manifold 11 are connected in a switchable manner through the first pipeline a and the second pipeline b, the hydrogen-nitrogen gas storage tank 21 and the hydrogen production component 22 are connected in a switchable manner through the first pipeline a and the third pipeline c, and the hydrogen production component 22 and the intake manifold 11 are connected in a switchable manner through the second pipeline b and the third pipeline c.
[0058] When the engine 1 is started, the hydrogen-nitrogen gas storage tank 21 feeds hydrogen-nitrogen gas into the intake manifold 11, and the hydrogen-nitrogen gas can be fully mixed with air in the intake manifold 11, enabling the hydrogen in the hydrogen-nitrogen gas to burn fully, thus facilitating the startup of the engine 1.
[0059] After the engine 1 is started, the high-temperature exhaust gas discharged from the engine 1 heats the hydrogen production component 22 through the exhaust manifold 13, so that the heat in the exhaust gas of the engine 1 can be recovered to improve the energy utilization rate.
[0060] After the engine 1 is started, since the ammonia device 3, the hydrogen-nitrogen gas storage tank 21, and the hydrogen production component 22 are all connected to the combustion chamber 12 through the intake manifold 11, ammonia, hydrogen-nitrogen gas, and air can be fully mixed through the intake manifold 11, enabling ammonia and hydrogen-nitrogen gas to burn fully, thereby increasing the combustion effect of the combustion chamber 12.
[0061] As Figure 2 shown, specifically, the engine 1 further includes a cylinder block 14, a cylinder head 15, a spark plug 16, and a piston 17. The cylinder head 15 is disposed on the cylinder block 14, the piston 17 is movably disposed in the cylinder block 14, a combustion chamber 12 is defined between the cylinder block 14, the piston 17, and the cylinder head 15, the spark plug 16 is disposed on the cylinder head 15 and is used to ignite the combustion chamber 12, the cylinder head 15 defines an intake passage 151 and an exhaust passage 152, one end of the intake passage 151 is in communication with the combustion chamber 12, the other end of the intake passage 151 is in communication with the intake manifold 11, one end of the exhaust passage 152 is in communication with the combustion chamber 12, and the other end of the exhaust passage 152 is in communication with the outlet manifold 13.
[0062] When the engine 1 ignites, hydrogen-nitrogen gas and air are mixed in the intake manifold 11, enter the combustion chamber 12 through the intake passage 151, and the spark plug 16 ignites the gas in the combustion chamber 12, thereby causing the piston to move to start the engine 1. The exhaust gas generated after the combustion in the combustion chamber 12 enters the exhaust manifold 13 through the exhaust passage 152 and is discharged through the exhaust manifold 13.
[0063] When the engine 1 is operating, hydrogen-nitrogen gas, ammonia gas and air are mixed in the intake manifold 13, enter the combustion chamber 12 through the intake passage 151, and the spark plug 16 ignites the gas in the combustion chamber 12, thereby causing the piston to move to maintain the operation of the engine 1. The exhaust gas generated after the combustion in the combustion chamber 12 enters the exhaust manifold 13 through the exhaust passage 152 and is discharged through the exhaust manifold 13.
[0064] As Figure 1 shown, specifically, the ammonia-hydrogen engine system 100 further includes a post-treatment device 4. The post-treatment device 4 is communicated with the exhaust manifold 12 to treat the exhaust gas from the combustion of the engine 1.
[0065] As Figure 2 shown, in some embodiments, the first pipeline a is provided with a first valve body f, the second pipeline b is provided with a second valve body g and a first injection valve h. The first injection valve h is used to inject hydrogen-nitrogen gas into the intake manifold 11 after the second valve body g is opened.
[0066] When both the first valve body f and the second valve body g are opened, the hydrogen-nitrogen gas storage tank 21 is communicated with the intake manifold 11, the hydrogen-nitrogen gas storage tank 21 is communicated with the hydrogen production assembly 22, and the hydrogen production assembly 22 is communicated with the intake manifold 11.
[0067] When the first valve body f is opened and the second valve body g is closed, the communication between the hydrogen-nitrogen gas storage tank 21 and the intake manifold 11 is disconnected, the hydrogen-nitrogen gas storage tank 21 is communicated with the hydrogen production assembly 22, and the communication between the hydrogen production assembly 22 and the intake manifold 11 is disconnected.
[0068] When the first valve body f is closed and the second valve body g is opened, the communication between the hydrogen-nitrogen gas storage tank 21 and the intake manifold 11 is disconnected, the communication between the hydrogen-nitrogen gas storage tank 21 and the hydrogen production assembly 22 is disconnected, and the hydrogen production assembly 22 is communicated with the intake manifold 11.
[0069] When both the first valve body f and the second valve body g are closed, the communication between the hydrogen-nitrogen gas storage tank 21 and the intake manifold 11 is disconnected, the communication between the hydrogen-nitrogen gas storage tank 21 and the hydrogen production assembly 22 is disconnected, and the communication between the hydrogen production assembly 22 and the intake manifold 11 is disconnected.
[0070] Through the first valve body f, the on / off of the first pipeline a can be controlled, and through the second valve body g, the on / off of the second pipeline b can be controlled. Thus, by controlling the states of the first valve body f and the second valve body g, the on / off state between the hydrogen-nitrogen gas storage tank 21 and the intake manifold 11 can be controlled, the on / off state between the hydrogen-nitrogen gas storage tank 21 and the hydrogen production component 22 can be controlled, and the on / off state between the hydrogen production component 22 and the intake manifold 11 can also be controlled.
[0071] By providing the first injection valve h, the flow rate of the hydrogen-nitrogen gas injected into the intake manifold 11 can be accurately controlled.
[0072] As Figure 2 shown, in some embodiments, the hydrogen-nitrogen gas device 2 further includes a heat exchanger 23 and a filter 24, and both the heat exchanger 23 and the filter 24 are provided on the third pipeline c.
[0073] The heat exchanger 23 can be an air heat exchange device or a coolant heat exchange device.
[0074] The heat exchanger 23 is provided on the third pipeline c and is used for heat exchange with the hydrogen-nitrogen gas entering the third pipeline c to cool down the high-temperature hydrogen-nitrogen gas. The cooled hydrogen-nitrogen gas can protect the components on the third pipeline c from being damaged due to excessive temperature.
[0075] The filter 24 is located on the third pipeline c between the heat exchanger 23 and the intake manifold 11 and is used for filtering impurities in the hydrogen-nitrogen gas. The filtered hydrogen-nitrogen gas is input into the intake manifold 21 to improve the combustion effect of the mixture gas in the engine 1.
[0076] As Figure 2 shown, in some embodiments, the ammonia device 3 is connected to the intake manifold 11 through the fourth pipeline d, the hydrogen production component 22 is connected to the fourth pipeline d through the fifth pipeline e, and the third valve body i is provided on the fifth pipeline e.
[0077] Through the fourth pipeline d, the ammonia device 3 and the intake manifold 11 can be connected, so that the ammonia generated by the ammonia device 3 can be introduced into the intake manifold 11. The hydrogen production component 22 is connected to the fourth pipeline d through the fifth pipeline e, so that the hydrogen production component 22 can communicate with the fourth pipeline d, and thus the ammonia generated by the ammonia device 3 can be introduced into the hydrogen production component 22. Through the third valve body i, the on / off of the fifth pipeline e can be controlled, and thus the on / off state between the ammonia device 3 and the hydrogen production component 22 can be controlled.
[0078] As Figure 2As shown, in some embodiments, the hydrogen production assembly 22 includes an ammonia reaction hydrogen production device 221 and a heater 222. The heater 222 is disposed in the ammonia reaction hydrogen production device 221. Both the third pipeline c and the fifth pipeline e are connected to the ammonia reaction hydrogen production device 221, and the ammonia reaction hydrogen production device 221 is disposed in the exhaust manifold 13.
[0079] A catalyst is provided in the ammonia reaction hydrogen production device 221, which can catalyze ammonia to decompose it into hydrogen and nitrogen. Since the ammonia reaction hydrogen production device 221 is disposed in the exhaust manifold 13, the exhaust manifold 13 can be used to heat the ammonia reaction hydrogen production device 221, thereby making full use of the heat energy of the exhaust gas of the engine 1.
[0080] The heater 222 can heat the ammonia reaction hydrogen production device 221 to enable the ammonia reaction hydrogen production device 221 to be at a suitable working temperature.
[0081] As Figure 1 shown, in some embodiments, the ammonia device 3 includes a liquid ammonia tank 31, a liquid ammonia pump 32, and a liquid ammonia vaporizer 33. The liquid ammonia tank 31 is connected to the liquid ammonia vaporizer 33 through the liquid ammonia pump 32. The cooling water of the engine 1 is connected to the liquid ammonia vaporizer 33 through the sixth pipeline m for heat exchange with the liquid ammonia in the liquid ammonia vaporizer 33. The liquid ammonia vaporizer 33 is connected to the fourth pipeline d, and a control valve (not shown in the figure) is provided on the sixth pipeline m.
[0082] The liquid ammonia tank 31 is connected to the liquid ammonia vaporizer 33 through the liquid ammonia pump 32 to convert liquid ammonia into gaseous ammonia. When the engine 1 is running stably, the temperature of the cooling water discharged from the engine 1 can reach above 90°C. In order to further utilize the cooling water of the engine 1 and improve the energy cycle utilization rate of the system, as an alternative embodiment of the present application, the cooling water of the engine 1 is connected to the liquid ammonia vaporizer 33 through the sixth pipeline m for heat exchange with the liquid ammonia in the liquid ammonia vaporizer 33. The cooling water of the engine 1 flows through the liquid ammonia vaporizer 33 to vaporize the liquid ammonia. A control valve is provided between the engine 1 and the liquid ammonia vaporizer 33, and the control valve can be opened or closed as needed.
[0083] As Figure 2 shown, in some embodiments, the fourth pipeline d is provided with a fourth valve body j and a second injection valve k. The second injection valve k is used to inject ammonia into the intake manifold 11 after the fourth valve body j is opened.
[0084] The on-off of the fourth pipeline d can be controlled through the fourth valve body j. The flow rate of ammonia injected from the fourth pipeline d into the intake manifold 11 can be more precisely controlled through the second injection valve k.
[0085] As Figure 2 shown, in some embodiments, the hydrogen-nitrogen gas storage tank 21 is provided with a pressure sensor 211.
[0086] The pressure inside the hydrogen-nitrogen gas storage tank 21 can be detected by the pressure sensor 211, so that the amount of hydrogen-nitrogen gas stored in the hydrogen-nitrogen gas storage tank 21 can be determined.
[0087] As Figure 2 shown, in some embodiments, the hydrogen production assembly 22 further includes a temperature sensor 223, and the temperature sensor 223 is disposed in the ammonia reaction hydrogen production device 221.
[0088] The temperature of the ammonia reaction hydrogen production device 221 can be detected by the temperature sensor 223, so as to facilitate the regulation of the temperature of the ammonia reaction hydrogen production device 221.
[0089] As Figure 3 shown, the ammonia-hydrogen engine starting method according to the embodiment of the present application is applied to the ammonia-hydrogen engine system as described above. The ammonia-hydrogen engine starting method includes:
[0090] S100. In response to the engine start signal, connect the hydrogen-nitrogen gas storage tank to the engine, and introduce the hydrogen-nitrogen gas in the hydrogen-nitrogen gas storage tank into the engine;
[0091] S200. Control the engine ignition, and obtain and judge the state of engine start;
[0092] S300. According to the successful start of the engine, connect the ammonia device to the engine, and introduce the ammonia in the ammonia device into the engine.
[0093] After receiving the engine start signal, control the connection between the hydrogen-nitrogen gas storage tank and the engine, so that the hydrogen-nitrogen gas in the hydrogen-nitrogen gas storage tank can enter the engine, control the engine ignition to ignite the hydrogen-nitrogen gas in the engine, thereby starting the engine. When the engine starts successfully, control the connection between the ammonia device and the engine, and introduce the mixture of ammonia and hydrogen-nitrogen gas into the engine, thereby increasing the load of the engine.
[0094] In some embodiments, after S300. According to the successful start of the engine, connect the ammonia device to the engine, and introduce the ammonia in the ammonia device into the engine, the ammonia-hydrogen engine starting method further includes:
[0095] Obtain the temperature of the hydrogen production assembly, and compare the temperature of the hydrogen production assembly with a preset value;
[0096] According to the temperature of the hydrogen production assembly being greater than or equal to the preset value, disconnect the connection between the hydrogen-nitrogen gas storage tank and the engine, connect the hydrogen production assembly and the engine, and connect the ammonia device and the hydrogen production assembly.
[0097] When the temperature of the hydrogen production component is greater than or equal to the preset value, it indicates that the temperature of the hydrogen production component reaches the appropriate operating temperature. Connect the ammonia device to the hydrogen production component, enable the hydrogen production component to prepare hydrogen-nitrogen gas from ammonia, connect the hydrogen production component to the engine, and cause the hydrogen production component to introduce ammonia into the engine. Disconnect the connection between the hydrogen-nitrogen gas storage tank and the engine to reduce the consumption of the hydrogen-nitrogen gas stored in the hydrogen-nitrogen gas storage tank.
[0098] In some embodiments, the ammonia-hydrogen engine starting method further includes:
[0099] In response to the engine shutdown signal, disconnect the connection between the hydrogen production component and the engine, and connect the hydrogen production component to the hydrogen-nitrogen gas storage tank;
[0100] Obtain the pressure inside the hydrogen-nitrogen gas storage tank, and compare the pressure of the hydrogen-nitrogen gas storage tank with the preset pressure;
[0101] According to the pressure of the hydrogen-nitrogen gas storage tank being greater than or equal to the preset pressure, disconnect the connection between the hydrogen production component and the hydrogen-nitrogen gas storage tank, disconnect the connection between the ammonia device and the engine, and disconnect the connection between the ammonia device and the hydrogen production component.
[0102] When the engine shuts down, disconnect the connection between the hydrogen production component and the engine, connect the hydrogen production component to the hydrogen-nitrogen gas storage tank, and cause the hydrogen production component to generate and transport hydrogen-nitrogen gas into the hydrogen-nitrogen gas storage tank to supplement the hydrogen-nitrogen gas reserve in the hydrogen-nitrogen gas storage tank. In addition, after the engine shuts down, the hydrogen production component continues to generate hydrogen-nitrogen gas, and can also recover and utilize the heat of the engine exhaust gas, so as to fully utilize the waste heat generated by the engine.
[0103] Obtain the pressure inside the hydrogen-nitrogen gas storage tank, and compare the pressure of the hydrogen-nitrogen gas storage tank with the preset pressure, so as to judge the content of hydrogen-nitrogen gas in the hydrogen-nitrogen gas storage tank. The pressure of the hydrogen-nitrogen gas storage tank being greater than or equal to the preset pressure indicates that the hydrogen-nitrogen gas storage tank is in a full state. Disconnect the connection between the hydrogen production component and the hydrogen-nitrogen gas storage tank, disconnect the connection between the ammonia device and the engine, and disconnect the connection between the ammonia device and the hydrogen production component.
[0104] As described above, only the preferred specific embodiments of the present application are provided, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An ammonia-hydrogen engine system, characterized in that, Comprising: An engine; An ammonia device, connected to the engine in a switchable manner; A hydrogen-nitrogen device, including a hydrogen-nitrogen storage tank and a hydrogen production component, the hydrogen-nitrogen storage tank is connected to the engine in a switchable manner, the hydrogen production component is connected to the engine in a switchable manner, and is connected to the hydrogen-nitrogen storage tank in a switchable manner; Wherein, the hydrogen-nitrogen storage tank is used to introduce hydrogen-nitrogen into the engine when the engine starts, the ammonia device is used to introduce ammonia into the engine after the engine starts, and is used to introduce ammonia into the hydrogen production component when the temperature of the hydrogen production component reaches a preset value. After the engine starts, the hydrogen production component is used to introduce hydrogen-nitrogen into the engine when the temperature reaches the preset value, and is used to introduce hydrogen-nitrogen into the hydrogen-nitrogen storage tank after the engine stops.
2. The ammonia-hydrogen engine system according to claim 1, wherein The engine further includes an intake manifold, an exhaust manifold and a combustion chamber. The intake manifold and the exhaust manifold are both communicated with the combustion chamber. The ammonia device, the hydrogen-nitrogen storage tank and the hydrogen production component are all connected to the combustion chamber through the intake manifold. The exhaust manifold is connected to the hydrogen production component to be able to heat the hydrogen production component; The hydrogen-nitrogen device further includes a first pipeline, a second pipeline and a third pipeline. The first pipeline is connected to the hydrogen-nitrogen storage tank in a switchable manner. The second pipeline is connected to the intake manifold in a switchable manner. The third pipeline is connected to the hydrogen production component. The first pipeline, the second pipeline and the third pipeline are connected to each other in pairs.
3. The ammonia-hydrogen engine system according to claim 2, wherein, The first pipeline is provided with a first valve body. The second pipeline is provided with a second valve body and a first injection valve. The first injection valve is used to inject hydrogen-nitrogen into the intake manifold after the second valve body is opened; The hydrogen-nitrogen device further includes a heat exchanger and a filter, and both the heat exchanger and the filter are arranged in the third pipeline.
4. The ammonia-hydrogen engine system according to claim 2, characterized in that, The ammonia device is connected to the intake manifold through a fourth pipeline. The hydrogen production component is connected to the fourth pipeline through a fifth pipeline. The fifth pipeline is provided with a third valve body.
5. The ammonia-hydrogen engine system according to claim 4, characterized in that, The hydrogen production component includes an ammonia reaction hydrogen production device and a heater. The heater is arranged in the ammonia reaction hydrogen production device. The third pipeline and the fifth pipeline are both connected to the ammonia reaction hydrogen production device. The ammonia reaction hydrogen production device is arranged in the exhaust manifold.
6. The ammonia-hydrogen engine system according to claim 4, wherein, The ammonia device includes a liquid ammonia tank, a liquid ammonia pump and a liquid ammonia vaporizer. The liquid ammonia tank is connected to the liquid ammonia vaporizer through the liquid ammonia pump. The cooling water of the engine is connected to the liquid ammonia vaporizer through a sixth pipeline for heat exchange with the liquid ammonia in the liquid ammonia vaporizer. The liquid ammonia vaporizer is connected to the fourth pipeline. A control valve is arranged on the sixth pipeline.
7. The ammonia-hydrogen engine system according to claim 5, wherein, The fourth pipeline is provided with a fourth valve body and a second injection valve. The second injection valve is used to inject ammonia into the intake manifold after the fourth valve body is opened; The hydrogen-nitrogen storage tank is provided with a pressure sensor; The hydrogen production component further includes a temperature sensor, and the temperature sensor is arranged in the ammonia reaction hydrogen production device.
8. A starting method for an ammonia-hydrogen engine, characterized in that, Applied to the ammonia-hydrogen engine system according to any one of claims 1 to 7, the method for starting the ammonia-hydrogen engine includes: In response to the start signal of the engine, connect the hydrogen-nitrogen gas storage tank to the engine, and introduce the hydrogen-nitrogen gas in the hydrogen-nitrogen gas storage tank into the engine; Control the ignition of the engine, obtain and judge the starting state of the engine; According to the successful start of the engine, connect the ammonia device to the engine, and introduce the ammonia of the ammonia device into the engine.
9. The method for starting an ammonia-hydrogen engine according to claim 8, characterized in that, After the ammonia device is connected to the engine according to the successful start of the engine and the ammonia of the ammonia device is introduced into the engine, the ammonia-hydrogen engine starting method further includes: Obtain the temperature of the hydrogen production component, and compare the temperature of the hydrogen production component with a preset value; According to the temperature of the hydrogen production component being greater than or equal to the preset value, disconnect the connection between the hydrogen-nitrogen gas storage tank and the engine, connect the hydrogen production component and the engine, and connect the ammonia device and the hydrogen production component.
10. The ammonia-hydrogen engine starting method according to claim 9, characterized in that, The ammonia-hydrogen engine starting method further includes: In response to the shutdown signal of the engine, disconnect the connection between the hydrogen production component and the engine, and connect the hydrogen production component and the hydrogen-nitrogen gas storage tank; Obtain the pressure in the hydrogen-nitrogen gas storage tank, and compare the pressure of the hydrogen-nitrogen gas storage tank with a preset pressure; According to the pressure of the hydrogen-nitrogen gas storage tank being greater than or equal to the preset pressure, disconnect the connection between the hydrogen production component and the hydrogen-nitrogen gas storage tank, disconnect the connection between the ammonia device and the engine, and disconnect the connection between the ammonia device and the hydrogen production component.