Ultrahigh-response high-frequency inductance ammonia cracking device and control method

Abstract

The ultrahigh-response high-frequency inductance ammonia cracking device comprises an ammonia cracking reaction inner container, an ammonia gas input end and a cracking gas output end are arranged at the two ends of the ammonia cracking reaction inner container respectively, and the ammonia cracking reaction inner container is filled with an ammonia cracking catalyst; the high-frequency inductance heating coil is wound on the periphery of the ammonia cracking reaction inner container, and the high-frequency inductance heating coil is used for realizing high-frequency inductance heating with the ammonia cracking reaction inner container serving as a magnetic core; the coil length regulation and control assembly comprises a front end cover, a movable end cover and a coil length driving part, and the two ends of the high-frequency inductance heating coil are connected to the front end cover and the movable end cover respectively. Through the structure, the distribution of the high-frequency alternating magnetic field is efficiently adjusted, the heated amount of the metal foam loaded ammonia cracking catalyst in the ammonia cracking reaction liner is changed, and the ammonia flow is correspondingly adjusted to adjust the parameters of the electric control valve. According to the invention, ultrahigh-response ammonia cracking required by cold start of the ammonia internal combustion engine can be realized, and the hydrogen yield can be dynamically adjusted according to different working conditions of the ammonia internal combustion engine.

Description

Technical Field

[0001] The present invention relates to the field of energy-saving and new energy vehicles, and in particular to an ultra-high-response high-frequency inductive ammonia cracking device and a control method. Background Art

[0002] Ammonia, as a zero-carbon fuel, can be used in ammonia internal combustion engines to push pistons to do work. However, ammonia is difficult to ignite, so hydrogen needs to be introduced into the cylinder of an ammonia internal combustion engine to assist combustion. Ammonia cracking hydrogen production technology can effectively crack ammonia to produce hydrogen at a certain reaction temperature and with the assistance of an ammonia cracking catalyst. Therefore, in transportation equipment, only ammonia as a raw material needs to be loaded to achieve stable combustion of ammonia-hydrogen in the cylinder of an ammonia internal combustion engine, thereby driving the vehicle.

[0003] However, how to achieve the rapid cold start-up requirements of the ammonia cracker, meet the different hydrogen requirements under complex operating conditions, achieve efficient energy utilization, achieve efficient cracking of ammonia, achieve the long-term stable operation requirements of the cracker, and how to achieve the preparation of high-pressure ammonia cracking gas are the pain points that restrict the development of ammonia-hydrogen fusion transportation equipment. Summary of the invention

[0004] The object of the present invention is to provide an ultra-high response high-frequency inductive ammonia cracking device and a control method to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] The technical solutions adopted to solve the above technical problems are:

[0006] The present invention provides an ultra-high-response high-frequency inductive ammonia cracking device, comprising:

[0007] An ammonia cracking reaction liner, with an ammonia input end and a cracking gas output end respectively provided at two ends, an ammonia cracking reaction liner is filled with an ammonia cracking catalyst, and the ammonia cracking reaction liner is a metal component;

[0008] A high-frequency induction heating coil is wound around the periphery of the ammonia cracking reaction liner, and the high-frequency induction heating coil is used to realize high-frequency induction heating with the ammonia cracking reaction liner as a magnetic core;

[0009] The coil length regulating component comprises a front end cover, a movable end cover and a coil length driving member. The two ends of the high-frequency induction heating coil are respectively connected to the front end cover and the movable end cover. The coil length driving member is used to drive the front end cover and / or the movable end cover to move axially along the ammonia cracking reaction liner.

[0010] The beneficial effects of the present invention are:

[0011] The high-frequency induction heating coil can be compressed or stretched in the axial direction of the ammonia cracking reaction liner, changing the form of the high-frequency alternating magnetic field, thereby heating the ammonia cracking reaction liner of different lengths and different amounts of ammonia cracking catalyst inside the magnetic field. Under cold start conditions, the high-frequency induction heating coil can be compressed and the ammonia cracking catalyst in the local ammonia cracking reaction liner can be centrally heated, and this part of the metal foam-loaded ammonia cracking catalyst can be instantly heated to a higher first temperature; during the hot engine process after the cold start is completed, in order to extend the service life of the metal foam-loaded ammonia cracking catalyst, the high-frequency induction heating coil can be stretched and the ammonia cracking catalyst in the entire ammonia cracking reaction liner can be uniformly heated to a lower second temperature. In this way, during the entire cold start-hot engine process, the device can efficiently crack a large flow of ammonia into hydrogen and nitrogen, while meeting the ultra-fast cold start requirements of the on-board ammonia reforming system of the ammonia internal combustion engine and avoiding the aging problem of the ammonia cracking catalyst to the greatest extent. The inner tank structure of the ammonia cracking reaction can be a high-pressure resistant stainless steel tank, which is conducive to the realization of high-pressure ammonia cracking. The hydrogen and nitrogen mixture can be directly transmitted to the intake rail of the ammonia internal combustion engine, avoiding the need for an additional gas booster and significantly improving the system integration and economy.

[0012] As a further improvement of the above technical solution, one end of the high-frequency induction heating coil is fixed to the front end cover, and the other end of the high-frequency induction heating coil is fixed to the movable end cover. Only the movable end cover is driven to move, which has a simple structure and is easy to drive, and meets the dynamic adjustment requirements of the high-frequency induction heating coil.

[0013] As a further improvement of the above technical solution, the ultra-high response high-frequency inductive ammonia cracking device includes: an inductive power regulation component, the inductive power regulation component includes a fixed electrical contact, a movable electrical contact and a regulation drive, the fixed electrical contact is electrically connected to one end of the high-frequency inductive heating coil, the movable electrical contact is in electrical contact with the periphery of the high-frequency inductive heating coil, and the regulation drive is used to drive the movable electrical contact to move axially along the ammonia cracking reaction liner.

[0014] Both the movable electrical contact and the fixed electrical contact are externally connected to an inductive heating power supply. By moving the movable electrical contact, the number of turns of the high-frequency inductive heating coil involved in the inductive heating is changed, and different amounts of metal foam-loaded ammonia cracking catalyst in the ammonia cracking reaction tank are heated to produce hydrogen-nitrogen mixed cracking gas with dynamically adjustable flow.

[0015] As a further improvement of the above technical solution, the movable electrical contact includes an elastic contact structure that elastically abuts and electrically contacts the outer periphery of the high-frequency induction heating coil, so that the movable electrical contact is in good contact with the high-frequency induction heating coil while changing the number of turns of the high-frequency induction heating coil.

[0016] As a further improvement of the above technical solution, the movable electrical contact also includes a conductive rail and an inductive power regulating slider, the conductive rail is located beside the axis of the high-frequency inductive heating coil, the inductive power regulating slider is slidably arranged on the conductive rail, the regulating drive is used to drive the inductive power regulating slider to move axially along the ammonia cracking reaction inner tank, and the elastic contact structure is arranged on the inductive power regulating slider.

[0017] In this solution, the inductor power control slider can move along the conductive rail between the front end cover and the movable end cover according to the different hydrogen requirements of the cylinder, thereby changing the number of turns of the high-frequency induction heating coil involved in induction heating. The inductor power control slider and the conductive rail are set to improve the movement stability.

[0018] As a further improvement of the above technical solution, the movable end cover is also equipped with a limit baffle that abuts against the inductor power control slider, so that the movable end cover pushes the inductor power control slider to move together, thereby improving the synchronization of the movement of the inductor power control slider and the movable end cover.

[0019] As a further improvement of the above technical solution, the inductor power control slider includes a motor insulation support frame, a conductive sliding platform, a conductive bow, a spring, and an elastic conductive plate;

[0020] The motor insulation support frame is fixedly connected to the conductive sliding platform, the conductive sliding platform is straddled on the conductive rail, an elastic conductive plate is installed in the conductive sliding platform, and a conductive bow and a spring are installed on the side of the conductive sliding platform close to the high-frequency induction heating coil;

[0021] The elastic conductive plate is closely fitted with the conductive rail, and the spring supports the conductive pantograph so that it is closely fitted with the high-frequency induction heating coil;

[0022] The elastic conductive plate, the conductive bow, the conductive rail and the high-frequency inductive heating coil constitute a conductive path.

[0023] The spring in this solution can ensure that the conductive bow is always in good contact with the high-frequency induction heating coil, and the elastic conductive plate can ensure that the conductive sliding platform is in good contact with the conductive rail, both of which improve the operating reliability of the device.

[0024] As a further improvement of the above technical solution, the coil length driving member includes a rear end cover, at least one screw rod, and a screw rod driving motor;

[0025] The screw is rotatably arranged on the front end cover, the screw is threadedly connected with the movable end cover, the screw drive motor is arranged on the rear end cover, and the output shaft of the screw drive motor is drivingly connected with the screw.

[0026] In this scheme, multiple screws are connected to their own driven gears respectively and are driven by a driving gear, which ensures the consistency of the movement of multiple screws and further increases the movement stability of the high-frequency induction heating coil during compression and extension. There is a small transmission ratio between the driving gear and the driven gear, which can realize fast screw transmission, thereby improving the rapid response capability of the device.

[0027] As a further improvement of the above technical solution, the ammonia input end is connected to the ammonia cracking reaction liner; the cracking gas output end is located near the rear end cover and is connected to the ammonia cracking reaction liner; the inner diameter of the cracking gas output end pipeline is larger than the inner diameter of the ammonia input end pipeline.

[0028] In this solution, the inner diameter of the cracked gas output end pipeline is larger than the inner diameter of the ammonia gas input end pipeline, which can avoid the increase of gas back pressure in the ammonia cracking reaction and improve the operating reliability and safety of the device.

[0029] The present invention also provides a control method for an ultra-high-response high-frequency inductive ammonia cracking device, which adopts an ultra-high-response high-frequency inductive ammonia cracking device as described in any one of the above.

[0030] When the ammonia internal combustion engine is in cold start condition, the specific electronic control method is as follows:

[0031] In order to meet the requirements of reliable ignition of ammonia internal combustion engines, a higher amount of hydrogen is required at this time;

[0032] The coil length driving member is turned on so that the coil length driving member drives the movable end cover and the movable electrical contact member to move toward the front end cover, so that the high-frequency induction heating coil is supplied with current, thereby causing the ammonia cracking catalyst corresponding to a section of the ammonia cracking reaction liner wrapped with the high-frequency induction heating coil to be instantaneously and centrally heated to a first temperature; at the same time, the flow rate of ammonia gas input into the ammonia cracking reaction liner is controlled to increase, thereby generating a large flow rate of hydrogen-nitrogen mixed cracking gas;

[0033] After the ammonia internal combustion engine is started, the specific electronic control method is as follows:

[0034] The coil length driving member drives the movable end cover to move away from the front end cover, and the regulating driving member drives the movable electrical contact member to move away from the front end cover, stretching the high-frequency induction heating coil so that the high-frequency induction heating coil completely covers the entire ammonia cracking reaction liner; at the same time, a large flow of ammonia gas is continuously controlled to be input, and a large flow of hydrogen-nitrogen mixed cracking gas is continuously generated;

[0035] After the ammonia internal combustion engine is started, the hydrogen demand is adjusted under different working conditions. The specific electronic control method is as follows:

[0036] The high-frequency induction heating coil is kept in a state of completely covering the entire ammonia cracking reaction liner. At this time, the movable electrical contact is controlled to move axially between the front end cover and the movable end cover along the ammonia cracking reaction liner according to different hydrogen requirements of the cylinder, thereby changing the number of turns of the high-frequency induction heating coil involved in the induction heating, so that different amounts of ammonia cracking catalyst in the ammonia cracking reaction liner are heated to a lower second temperature; at the same time, by adjusting the input amount of ammonia, a hydrogen-nitrogen mixed cracking gas with dynamically adjustable flow is generated.

[0037] The high-frequency inductive heating coil can be compressed or stretched. Under cold start conditions, the high-frequency inductive heating coil can be compressed to heat the metal foam-loaded ammonia cracking catalyst in the local ammonia cracking reaction tank to a higher first temperature; during the warm-up process after the cold start is completed, the high-frequency inductive heating coil can be stretched and uniformly heat the metal foam-loaded ammonia cracking catalyst in the entire ammonia cracking reaction tank to a lower second temperature to extend the service life of the catalyst. In this way, the device can efficiently crack a large flow of ammonia into hydrogen and nitrogen, while meeting the requirements of ultra-fast cold start and avoiding the problem of catalyst aging to the greatest extent. The high-pressure stainless steel ammonia cracking reaction tank is conducive to the realization of high-pressure ammonia cracking, and the hydrogen-nitrogen mixture can be directly transported to the intake rail of the ammonia internal combustion engine, significantly improving the system integration and economy. The movable electrical contact can change the number of turns of the high-frequency inductive heating coil involved in the inductive heating according to different hydrogen requirements, heat different amounts of metal foam-loaded ammonia cracking catalysts and produce hydrogen-nitrogen mixed cracking gas with dynamically adjustable flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0039] Figure 1 It is a structural schematic diagram of the ultra-high response high-frequency inductive ammonia cracking device provided by the present invention;

[0040] Figure 2 It is a schematic diagram of the structure of the inductor power regulating slider in the ultra-high response high-frequency inductor ammonia cracking device provided by the present invention;

[0041] Figure 3 It is a schematic cross-sectional structure diagram of the ultra-high response high-frequency inductive ammonia cracking device provided by the present invention;

[0042] Figure 4 It is a schematic diagram of the movement of the movable end cover of the ultra-high response high-frequency inductive ammonia cracking device provided by the present invention during cold start-up conditions;

[0043] Figure 5 It is a schematic diagram of the movement of the movable end cover and the inductive power regulating slider of the ultra-high response high-frequency inductive ammonia cracking device provided by the present invention under the heat engine and different working conditions. DETAILED DESCRIPTION

[0044] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0047] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0048] Reference Figures 1 to 5 The ultra-high response high-frequency inductive ammonia cracking device of the present invention is implemented as follows:

[0049] like Figure 1 As shown, the ultra-high response dynamically adjustable high-frequency inductive ammonia cracking device comprises an ammonia cracking reaction liner 2, a high-frequency inductive heating coil 1, and a coil length control component. The ammonia cracking reaction liner is provided with an ammonia input end and a cracking gas output end 22 at both ends respectively; the high-frequency inductive heating coil 1 is wound around the periphery of the ammonia cracking reaction liner 2, and the high-frequency inductive heating coil 1 is used to heat the ammonia cracking reaction liner 2. The ammonia cracking reaction liner 2 is a metal component and serves as the magnetic core of the high-frequency inductive heating coil 1; the coil length driving member is used to drive the movable end cover 3 to move in the axial direction of the ammonia cracking reaction liner 2, and the coil length control component comprises a front end cover 4, a movable end cover 3 and a coil length driving member.

[0050] Specifically, the interior of the ammonia cracking reaction liner 2 is filled with an ammonia cracking catalyst, and the ammonia cracking reaction liner 2 is a metal component; the high-frequency induction heating coil 1 is wound around the periphery of the ammonia cracking reaction liner 2, and the two ends of the high-frequency induction heating coil 1 are respectively fixed to the front end cover 4 and the movable end cover 3, and one end of the ammonia cracking reaction liner 2 is fixedly inserted in the front end cover 4, and the other end is inserted in the movable end cover 3; the high-frequency induction heating coil 1 can be pushed by the movable end cover 3 to move in the axial direction of the ammonia cracking reaction liner 2, changing the form of the high-frequency alternating magnetic field, thereby heating the ammonia cracking reaction liner 2 of different lengths and the metal foam-loaded ammonia cracking catalyst 23 of different amounts inside the magnetic field. The structure of the ammonia cracking reaction liner 2 can be a high-pressure resistant stainless steel liner, which is conducive to realizing high-pressure ammonia cracking, and the hydrogen-nitrogen mixture can be directly transported to the intake rail of the ammonia internal combustion engine, avoiding the need for an additional gas supercharger, and significantly improving the system integration and economy.

[0051] In some other embodiments, the front end cover 4 and the movable end cover 3 can be driven to approach each other at the same time, thereby increasing the number of turns of the inner collar per unit length to meet the rapid start requirement of the ammonia internal combustion engine of the present invention when it is in a cold start condition.

[0052] like Figure 1 As shown, the ultra-high response dynamically adjustable high-frequency inductive ammonia cracking device also includes an inductive power regulation component, which includes a fixed electrical contact, a movable electrical contact and a regulation drive. In this embodiment, the fixed electrical contact is a coil terminal 11, and the movable electrical contact includes an elastic contact structure that elastically abuts and electrically contacts the outer periphery of the high-frequency inductive heating coil 1. The regulation drive is used to drive the movable elastic contact structure to move axially along the ammonia cracking reaction liner 2.

[0053] Specifically, the movable electrical contact includes a conductive rail 82, an inductive power regulating slider 81, a conductive rail terminal 83, and a rear end cover 5; one end of the conductive rail 82 is fixed to the front end cover 4, and the other end is fixed to the rear end cover 5, and is installed above the axis of the high-frequency inductive heating coil 1. In some other embodiments, the conductive rail 82 can also be installed on the side of the axis of the high-frequency inductive heating coil 1, and the conductive rail terminal 83 is connected to the conductive rail 82 at the rear end cover 5; the inductive power regulating slider 81 can reciprocate along the conductive rail 82. The conductive rail terminal 83 and the coil terminal 11 are both externally connected to the inductive heating power supply. The inductive power regulating slider 81 can move along the conductive rail 82 between the front end cover 4 and the movable end cover 3 according to different cylinder hydrogen requirements, thereby changing the number of turns of the high-frequency inductive heating coil 1 involved in inductive heating, heating different amounts of metal foam-loaded ammonia cracking catalysts 23 in the ammonia cracking reaction liner 2, and generating hydrogen-nitrogen mixed cracking gas with dynamically adjustable flow.

[0054] like Figure 2As shown, the regulating drive member includes a slider driving motor 811, a slider driving gear 812, and a rack 8; the two ends of the rack 8 are respectively fixed to the front cover 4 and the rear cover 5, the rack 8 is parallel to the conductive rail 82, and the two surfaces of the rack 8 are evenly provided with teeth; there are two slider driving motors 811, which are fixed to the inductance power regulating slider 81 through a motor insulating support frame 813; the output shafts of the two slider driving motors 811 are respectively connected to the rotating shafts of the two slider driving gears 812, and the two slider driving gears 812 are respectively in contact with the teeth on the upper and lower surfaces of the rack 8 to form a gear transmission relationship;

[0055] The inductor power regulating slider 81 includes a motor insulating support frame 813, a conductive sliding platform 814, and an elastic conductive plate 817, and the elastic contact structure includes a conductive bow 815 and a spring 816;

[0056] The lower part of the motor insulation support frame 813 is fixedly connected to the conductive sliding platform 814, and the conductive sliding platform 814 sits astride the conductive rail 82. An elastic conductive plate 817 is installed in the conductive sliding platform 814, and a conductive bow 815 and a spring 816 are installed at the lower part. The elastic conductive plate 817 fits tightly with the conductive rail 82, and the spring 816 supports the conductive bow 815 so that it fits tightly with the high-frequency induction heating coil 1; the elastic conductive plate 817, the conductive bow 815, the conductive rail 82, and the high-frequency induction heating coil 1 constitute a conductive path, and the elastic connection allows the movable electrical contact to have good contact with the high-frequency induction heating coil 1 while changing the number of turns of the high-frequency induction heating coil.

[0057] The movement of the inductive power regulating slider 81 adopts rack transmission, which can achieve high transmission efficiency, high movement accuracy, and can move with any stroke length; the slider driving gear 812 is driven by the slider driving motor 811 to mesh with the rack 8, so that the movement speed of the inductive power regulating slider 81 can be adjusted in a wide range, further enhancing the rapid response capability and hydrogen production adaptability of the device; the spring 816 can ensure that the conductive bow 815 is always in good contact with the high-frequency inductive heating coil 1, and the elastic conductive plate 817 can ensure that the conductive sliding platform 814 is in good contact with the conductive rail 82, both of which improve the operating reliability of the device. In some other embodiments, the regulating drive member can be driven by a cylinder, an electric push rod, or a motor screw as a driving unit and provided with a corresponding slide rail to improve the accuracy of the movement.

[0058] In some other embodiments, the regulating drive member can use a cylinder, an electric push rod, or a motor screw drive as a drive unit, and be provided with a corresponding slide rail to improve the accuracy of movement.

[0059] In some other embodiments, the elastic contact structure can be an electroelastic sheet, which is arranged at the output end of the regulating drive component and elastically abuts and electrically contacts the outer periphery of the high-frequency induction heating coil 1. It has the advantage of not being easy to short-circuit, and the electroelastic sheet is connected to the insulated wire.

[0060] like Figure 1 As shown, the coil length driving member also includes a plurality of screw holes 32 located on the movable end cover 3 and a plurality of bearings 61 located on the front end cover 4. One end of the screw 6 is connected to the inner hole of the bearing 61, and its rod body respectively passes through the plurality of screw holes 32 to form a screw transmission relationship. The screw transmission control is simple, can achieve high-precision positioning, can withstand large loads and maintain the stability of the transmission, has high reliability and durability, and uses a plurality of screws 6 to jointly push the movable end cover 3, which can further ensure the movement stability of the high-frequency induction heating coil 1 during compression and stretching.

[0061] like Figure 1 As shown, the ultra-high response dynamically adjustable high-frequency inductive ammonia cracking device also includes a coupling 62, a screw drive motor 7, a driving gear 71, and a driven gear 72; there are multiple driven gears 72, and the rotating shaft of the driven gear 72 is fixed to the rear end cover 5; the driving shaft of the screw drive motor 7 is connected to the rotating shaft of the driving gear 71, and the driving gear 71 and the multiple driven gears 72 respectively form a gear transmission relationship; there is a small transmission ratio between the driving gear 71 and the driven gear 72; the other end of the screw 6 is connected to the multiple driven gears 72 through multiple couplings 62. Multiple screws 6 are respectively connected to their respective driven gears 72, and are uniformly driven by a driving gear 71, which ensures the consistency of the movement of multiple screws 6 and further increases the movement stability of the high-frequency inductive heating coil 1 during compression and tension. There is a small transmission ratio between the driving gear 71 and the driven gear 72, which can realize fast screw transmission, thereby improving the rapid response capability of the device.

[0062] like Figure 3 As shown, the ammonia cracking reaction inner liner 2 is filled with an ammonia cracking catalyst, and the ammonia cracking catalyst includes a metal foam-supported ammonia cracking catalyst 23. The metal foam carrier has electrical conductivity, and the metal foam carrier has a high surface area and a porous structure, which can be coated with a large amount of ammonia cracking catalyst and allow ammonia gas to flow through the porous structure to avoid the generation of high gas back pressure.

[0063] like Figure 1As shown, the ultra-high response dynamically adjustable high-frequency inductive ammonia cracking device also includes an insulation layer 9; the insulation layer 9 is located in the annular space between the ammonia cracking reaction liner 2 and the high-frequency inductive heating coil 1, and is tightly wrapped around the outer wall of the ammonia cracking reaction liner 2; the insulation layer 9 is made of insulating and high-temperature resistant materials such as graphite felt, ceramic fiber wool or aluminum silicate fiber, which can avoid heat dissipation of the ammonia cracking reaction liner 2 and improve energy utilization. At the same time, the insulation layer 9 can prevent the high-frequency inductive heating coil 1 from being subjected to high-temperature heat radiation, thereby improving the durability of the device; the insulation layer 9 is made of insulating and high-temperature resistant materials, which not only has a heat preservation effect but also avoids the magnetic shielding effect on the internal ammonia cracking reaction liner 2. The ammonia cracking reaction liner 2 is also connected to an ammonia input end 21 and a cracking gas output end 22; the inner diameter of the cracking gas output end 22 pipeline is larger than the inner diameter of the ammonia input end 21 pipeline. The inner diameter of the cracking gas output end pipeline 22 of this scheme is larger than the inner diameter of the ammonia input end pipeline 21, which can avoid the increase of gas back pressure in the ammonia cracking reaction and improve the operating reliability and safety of the device. An ammonia flow regulating electric control valve 211 is also installed between the ammonia input end 21 and the ammonia cracking reaction liner 2. The ammonia flow regulating electric control valve 211 of this solution can adjust the input amount of ammonia according to the different hydrogen requirements of the cylinders of the ammonia internal combustion engine, thereby achieving a dynamic adjustable effect of the hydrogen production of the device.

[0064] This embodiment also provides a control method applicable to the above-mentioned ultra-high response dynamically adjustable high-frequency inductive ammonia cracking device, which is specifically as follows:

[0065] When the ammonia internal combustion engine is in cold start condition, the specific electronic control method is as follows:

[0066] In order to meet the requirements of reliable ignition of ammonia internal combustion engines, a higher amount of hydrogen is required at this time;

[0067] like Figure 4 As shown, the screw drive motor 7 drives the movable end cover 3 to move toward the front end cover 4, squeezing the high-frequency induction heating coil 1, so that the number of turns of the high-frequency induction heating coil 1 per unit length outside the ammonia cracking reaction liner 2 located near the front end cover 4 increases. During the movement of the movable end cover 3 toward the front end cover 4, the limit baffle 31 is in close contact with the inductance power regulating slider 81 and drives it to move together;

[0068] A high-frequency current is passed through the high-frequency induction heating coil 1 through the coil terminal 11 and the conductive rail terminal 83. The current will flow through the entire high-frequency induction heating coil 1 and form a high-frequency alternating magnetic field at a section of the ammonia cracking reaction liner 2 located near the front end cover 4. The metal wall of the section of the ammonia cracking reaction liner 2 and a part of the metal foam-loaded ammonia cracking catalyst 23 in the section of the ammonia cracking reaction liner 2 generate induced eddy currents. Since the entire high-frequency induction heating coil 1 only heats a part of the ammonia cracking reaction liner 2 and the metal foam-loaded ammonia cracking catalyst 23 therein, this part of the metal foam-loaded ammonia cracking catalyst 23 will be instantly heated to a higher first temperature.

[0069] At the same time, the ammonia flow regulating electric control valve 211 controls the input of ammonia with a larger flow rate, and the ammonia flows through the metal foam-loaded ammonia cracking catalyst 23 heated to a relatively high first temperature. At this time, although the mass of the heated metal foam-loaded ammonia cracking catalyst 23 is relatively small, due to the high cracking temperature, the ammonia can still be cracked and hydrogen produced efficiently, thereby generating a large flow rate of hydrogen-nitrogen mixed cracked gas.

[0070] In order to meet the heat engine demand for a period of time after the ammonia internal combustion engine is ignited, the amount of hydrogen required is still high at this time. Although the metal foam-supported ammonia cracking catalyst 23 with a small mass can crack a large amount of ammonia at a higher first temperature to produce a large amount of hydrogen-nitrogen mixed cracking gas, the long-term operation of the metal foam-supported ammonia cracking catalyst 23 at the higher first temperature will lead to accelerated aging of the catalyst. Therefore, in order to produce a larger flow of hydrogen-nitrogen mixed cracking gas and avoid catalyst aging, after the ammonia internal combustion engine is started, the specific electronic control method is as follows:

[0071] like Figure 5 As shown, the screw drive motor 7 drives the movable end cover 3 to move toward the rear end cover 5, stretching the high-frequency induction heating coil 1, so that the high-frequency induction heating coil 1 completely covers the entire ammonia cracking reaction liner 2, and forms a high-frequency alternating magnetic field inside the entire ammonia cracking reaction liner 2, so that the metal wall of the entire ammonia cracking reaction liner 2 and all the metal foam-loaded ammonia cracking catalysts 23 generate induced eddy currents. Since the heating objects of the high-frequency induction heating coil 1 increase at this time, the temperature of all the metal foam-loaded ammonia cracking catalysts 23 will reach a lower second temperature;

[0072] At the same time, the ammonia flow regulating electric control valve 211 continues to control the input of ammonia with a larger flow rate, and the ammonia flows through all the metal foam-loaded ammonia cracking catalysts 23 with a lower second temperature. Although the cracking temperature is low at this time, since the mass of the metal foam-loaded ammonia cracking catalysts 23 participating in the ammonia cracking reaction is relatively large, efficient cracking of ammonia to produce hydrogen can still be achieved, thereby generating a large flow rate of hydrogen-nitrogen mixed cracked gas.

[0073] After the ammonia internal combustion engine is started, its cylinders have different hydrogen requirements under different working conditions. For example, under heavy load and high speed working conditions, the cylinder hydrogen requirement is higher, while under light load and low speed working conditions, the cylinder hydrogen requirement is lower. According to the different hydrogen requirements, the specific electronic control method is as follows:

[0074] The high-frequency induction heating coil 1 maintains a state of completely covering the entire ammonia cracking reaction liner 2. At this time, the induction power regulating slider 81 can move along the conductive rail 82 between the front end cover 4 and the movable end cover 3 according to different cylinder hydrogen requirements, thereby changing the number of turns of the high-frequency induction heating coil 1 involved in induction heating, so that different amounts of metal foam-loaded ammonia cracking catalyst 23 in the ammonia cracking reaction liner 2 are heated to a lower second temperature;

[0075] At the same time, the ammonia flow regulating electric control valve 211 regulates the input amount of ammonia. When the metal foam-loaded ammonia cracking catalyst 23 is heated to a lower second temperature, the input amount of ammonia is higher; when the metal foam-loaded ammonia cracking catalyst 23 is heated to a lower second temperature, the input amount of ammonia is lower, thereby generating a hydrogen-nitrogen mixed cracking gas with dynamically adjustable flow.

[0076] In summary, the high-frequency inductive heating coil 1 can be compressed or stretched. Under cold start conditions, the high-frequency inductive heating coil 1 can be compressed to heat the metal foam-loaded ammonia cracking catalyst 23 in the local ammonia cracking reaction liner 2 to a higher first temperature; during the warm-up process after the cold start is completed, the high-frequency inductive heating coil 1 can be stretched and the metal foam-loaded ammonia cracking catalyst 23 in the entire ammonia cracking reaction liner 2 can be uniformly heated to a lower second temperature to extend the service life of the catalyst. In this way, the device can efficiently crack a large flow of ammonia into hydrogen and nitrogen, while meeting the requirements of ultra-fast cold start and avoiding the problem of catalyst aging to the greatest extent. The high-pressure stainless steel ammonia cracking reaction liner 2 is conducive to realizing high-pressure ammonia cracking, and the hydrogen-nitrogen mixture can be directly transported to the intake rail of the ammonia internal combustion engine, significantly improving the system integration and economy. The inductive power control slider 81 can change the number of turns of the high-frequency inductive heating coil 1 involved in the inductive heating according to different hydrogen requirements, heat different amounts of metal foam-loaded ammonia cracking catalyst 23 and produce hydrogen-nitrogen mixed cracked gas with dynamically adjustable flow. The movement of the movable end cover 3 is driven by a screw, which is simple to control, has high positioning accuracy, can maintain transmission stability, and has high reliability and durability. Multiple screws 6 jointly push the movable end cover 3 to ensure the smooth movement of the high-frequency induction heating coil 1 during compression and tension. Multiple screws 6 are uniformly driven by a driving gear 71, which ensures the consistency of movement and increases the smooth movement of the high-frequency induction heating coil 1 during compression and tension. There is a small transmission ratio between the driving gear 71 and the driven gear 72, which can realize fast screw transmission and improve the rapid response capability of the device. The movement of the inductive power regulating slider 81 adopts rack transmission, which can achieve high transmission efficiency, high movement accuracy, and can move with any stroke length; the slider driving gear 812 is driven by the slider driving motor 811 to mesh with the rack 8, so that the movement speed of the inductive power regulating slider 81 can be adjusted in a wide range, enhancing the rapid response capability and hydrogen production adaptability of the device; the spring 816 can ensure that the conductive bow 815 is always in good contact with the high-frequency inductive heating coil 1, and the elastic conductive plate 817 can ensure that the conductive sliding platform 814 is in good contact with the conductive rail 82, both of which improve the operating reliability of the device. The metal foam carrier has electrical conductivity, and the metal foam carrier has a high surface area and a porous structure, which can be coated with a large amount of ammonia cracking catalyst, and can allow ammonia to flow through the porous structure to avoid the generation of high gas back pressure. The insulation layer 9 can prevent the heat dissipation of the ammonia cracking reaction liner 2, thereby improving the energy utilization rate. At the same time, the insulation layer 9 can prevent the high-frequency induction heating coil 1 from being subjected to high-temperature heat radiation, thereby improving the durability of the device. The insulation layer 9 is made of insulating and high-temperature resistant material, which not only has a heat preservation effect but also avoids the magnetic shielding effect on the internal ammonia cracking reaction liner 2. The inner diameter of the cracking gas output end 22 pipeline is larger than the inner diameter of the ammonia gas input end 21 pipeline, thereby avoiding the increase of gas back pressure in the ammonia cracking reaction, thereby improving the operating reliability and safety of the device.The ammonia flow regulating electric control valve 211 can adjust the input amount of ammonia according to the different hydrogen requirements of the cylinders of the ammonia internal combustion engine, thereby achieving a dynamic adjustable effect of the hydrogen production of the device.

[0077] The preferred embodiments of the present invention are described in detail above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An ultra-high response high-frequency inductive ammonia cracking device, It is characterized in that include: An ammonia cracking reaction liner, with an ammonia input end and a cracking gas output end respectively provided at two ends, an ammonia cracking reaction liner is filled with an ammonia cracking catalyst, and the ammonia cracking reaction liner is a metal component; A high-frequency induction heating coil is wound around the periphery of the ammonia cracking reaction liner, and the high-frequency induction heating coil is used to realize high-frequency induction heating with the ammonia cracking reaction liner as a magnetic core; The coil length regulating component comprises a front end cover, a movable end cover and a coil length driving member. The two ends of the high-frequency induction heating coil are respectively connected to the front end cover and the movable end cover. The coil length driving member is used to drive the front end cover and / or the movable end cover to move axially along the ammonia cracking reaction liner.

2. The ultra-high response high-frequency inductive ammonia cracking device according to claim 1, Features: One end of the high-frequency induction heating coil is fixed to the front end cover, and the other end of the high-frequency induction heating coil is fixed to the movable end cover.

3. The ultra-high response high-frequency inductive ammonia cracking device according to claim 1, Features: The ultra-high response high-frequency inductive ammonia cracking device includes: an inductive power regulation component, the inductive power regulation component includes a fixed electrical contact, a movable electrical contact and a regulation drive component, the fixed electrical contact is electrically connected to one end of the high-frequency inductive heating coil, the movable electrical contact is in electrical contact with the periphery of the high-frequency inductive heating coil, and the regulation drive component is used to drive the movable electrical contact to move axially along the ammonia cracking reaction liner.

4. The ultra-high response high-frequency inductive ammonia cracking device according to claim 3, Features: The movable electrical contact comprises an elastic contact structure which elastically abuts against and electrically contacts the outer periphery of the high-frequency induction heating coil.

5. The ultra-high response high frequency inductive ammonia cracking device according to claim 4, Features: The movable electrical contact also includes a conductive rail and an inductive power regulating slider. The conductive rail is located beside the axis of the high-frequency inductive heating coil. The inductive power regulating slider is slidably arranged on the conductive rail. The regulating drive is used to drive the inductive power regulating slider to move axially along the ammonia cracking reaction liner. The elastic contact structure is arranged on the inductive power regulating slider.

6. The ultra-high response high frequency inductive ammonia cracking device according to claim 5, Features: The inductor power regulating slider includes a motor insulating support frame, a conductive sliding platform, and an elastic conductive plate, and the elastic contact structure includes a conductive bow and a spring; The motor insulation support frame is fixedly connected to the conductive sliding platform, the conductive sliding platform is straddled on the conductive rail, an elastic conductive plate is installed in the conductive sliding platform, and a conductive bow and a spring are installed on the side of the conductive sliding platform close to the high-frequency induction heating coil; The elastic conductive plate is closely fitted with the conductive rail, and the spring supports the conductive pantograph so that it is closely fitted with the high-frequency induction heating coil; The elastic conductive plate, the conductive bow, the conductive rail and the high-frequency inductive heating coil constitute a conductive path.

7. The ultra-high response high frequency inductive ammonia cracking device according to claim 5, Features: The movable end cover is also provided with a limit baffle which abuts against the inductor power regulating slider, so that the movable end cover pushes the inductor power regulating slider to move together.

8. The ultra-high response high frequency inductive ammonia cracking device according to claim 2, Features: The coil length driving member includes a rear end cover, at least one lead screw, and a lead screw driving motor; The screw is rotatably arranged on the front end cover, the screw is threadedly connected with the movable end cover, the screw drive motor is arranged on the rear end cover, and the output shaft of the screw drive motor is drivingly connected with the screw.

9. The ultra-high response high frequency inductive ammonia cracking device according to claim 1, Features: The ammonia gas input end is connected in series with the ammonia cracking reaction inner container; The cracked gas output end is located near the rear end cover and is connected to the ammonia cracking reaction liner; The inner diameter of the pipeline at the cracking gas output end is greater than the inner diameter of the pipeline at the ammonia gas input end.

10. A control method for a high-frequency inductive ammonia cracking device with ultra-high response, Features: It adopts an ultra-high response high-frequency inductive ammonia cracking device as claimed in any one of claims 3 to 9. When the ammonia internal combustion engine is in a cold start condition, the specific electronic control method is as follows: In order to meet the requirements of reliable ignition of ammonia internal combustion engines, a higher amount of hydrogen is required at this time; The coil length driving member is turned on so that the coil length driving member drives the movable end cover and the movable electrical contact member to move toward the front end cover, so that the high-frequency induction heating coil is supplied with current, thereby causing the ammonia cracking catalyst corresponding to a section of the ammonia cracking reaction liner wrapped with the high-frequency induction heating coil to be instantaneously and centrally heated to a first temperature; at the same time, the flow rate of ammonia gas input into the ammonia cracking reaction liner is controlled to increase, thereby generating a large flow rate of hydrogen-nitrogen mixed cracking gas; After the ammonia internal combustion engine is started, the specific electronic control method is as follows: The coil length driving member drives the movable end cover to move away from the front end cover, and the regulating driving member drives the movable electrical contact member to move away from the front end cover, stretching the high-frequency induction heating coil so that the high-frequency induction heating coil completely covers the entire ammonia cracking reaction liner; at the same time, a large flow of ammonia gas is continuously controlled to be input, and a large flow of hydrogen-nitrogen mixed cracking gas is continuously generated; After the ammonia internal combustion engine is started, the hydrogen demand is adjusted under different working conditions. The specific electronic control method is as follows: The high-frequency induction heating coil is kept in a state of completely covering the entire ammonia cracking reaction liner. At this time, the movable electrical contact is controlled to move axially between the front end cover and the movable end cover along the ammonia cracking reaction liner according to different hydrogen requirements of the cylinder, thereby changing the number of turns of the high-frequency induction heating coil involved in the induction heating, so that different amounts of ammonia cracking catalyst in the ammonia cracking reaction liner are heated to a lower second temperature; at the same time, by adjusting the input amount of ammonia, a hydrogen-nitrogen mixed cracking gas with dynamically adjustable flow is generated.

Images