Metal fuel reaction heat release device

Abstract

The invention discloses a metal fuel reaction heat release device which comprises a shell provided with distribution plates and partition plates which are distributed at intervals so as to divide the inner space of the shell into an oxidant cavity, a cooling water cavity and a reaction cavity, and an oxidant inlet pipe, a cooling water inlet pipe and a metal fuel conveying pipe are arranged on the outer wall of the shell; the oxidant inlet pipe is communicated with the oxidant cavity, and the cooling water inlet pipe is communicated with the cooling water cavity; the partition plate is provided with a plurality of oxidizing agent hole channels, a plurality of cooling water hole channels and a plurality of metal fuel hole channels. The oxidizing agent pore channel comprises a plurality of first oxidizing agent pore channels which are distributed on the peripheral side of the metal fuel pore channel, and a preset angle is formed between the central axis of each first oxidizing agent pore channel and the central axis of the metal fuel pore channel. According to the invention, the space in the reaction cavity is fully utilized, and a diffusion combustion mode is adopted, so that efficient, wall-sticking-free and reliable reaction heat release of metal fuel is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of metal combustion, and further to a metal fuel reaction exothermic device. Background Art

[0002] Metal fuel reaction exothermic devices primarily use metals such as aluminum, magnesium, and iron as raw materials. They generate heat through combustion with oxygen and steam. This heat can be directly supplied to heat-consuming equipment such as boilers, used to generate electricity in Stirling engines, or used to heat water and other media to generate steam to drive steam or gas turbines. Metal fuel reacts with oxygen and steam without carbon emissions. The resulting metallic aluminum oxide can be reduced to metal using green hydrogen generated from low-grade green energy, making it an ideal zero-carbon fuel. Metal fuel consumes approximately one-third the oxygen used by hydrocarbon fuels such as diesel and methanol per unit of calorific value. In oxygen-free environments such as space, underwater, and confined spaces, this allows the energy system to carry less oxygen, significantly increasing the system's energy density.

[0003] The exothermic device for metal fuel reaction is the core device for efficient, stable and reliable utilization of metal fuel. Currently, there are problems such as difficulty in ignition and startup, low reaction efficiency, and metal oxide wall adhesion. At present, relevant institutions at home and abroad have carried out relevant research on metal fuel reactions and have formed patents. Patent CN113738529 proposes a swirl-type aluminum powder burner with the characteristics of zero gas emissions and uniform temperature. However, the swirl combustion method it adopts can easily cause the aluminum oxide particles produced by the reaction to adhere to the inner wall of the burner, which can easily cause accumulation and clogging problems over time. Patent US8656724 proposes an aluminum powder burner, which adopts a method of wrapping an oxidant around the aluminum powder flow in the middle of the reactor to greatly reduce the problem of aluminum oxide wall adhesion. However, due to the weak reactivity of aluminum powder, the contact probability of aluminum and oxidant in this scheme is relatively small, and a single aluminum powder jet can easily cause suction, which in turn causes high-temperature molten aluminum oxide to adhere to the inner wall of the reactor top cover and burn over time.

[0004] Therefore, it is necessary to design a metal fuel reaction exothermic device to solve the above problems. Summary of the Invention

[0005] In response to the above technical problems, the purpose of the present invention is to provide a metal fuel reaction heat release device that fully utilizes the space in the reaction chamber and adopts a diffusion combustion method to achieve efficient, non-sticky and reliable reaction heat release of the metal fuel.

[0006] In order to achieve the above-mentioned object, the present invention provides a metal fuel reaction heat release device, comprising:

[0007] a shell, wherein a distribution plate and a partition are provided in the shell at intervals, wherein the distribution plate and the partition divide the internal space of the shell into an oxidant chamber, a cooling water chamber, and a reaction chamber; an oxidant inlet pipe, a cooling water inlet pipe, and a metal fuel delivery pipe are provided on the outer wall of the shell, wherein the oxidant inlet pipe is connected to the oxidant chamber, and the cooling water inlet pipe is connected to the cooling water chamber;

[0008] The partition is provided with a plurality of oxidant channels, a plurality of cooling water channels and a plurality of metal fuel channels, each of the oxidant channels is connected to the oxidant chamber through an oxidant delivery pipe, each of the cooling water channels is connected to the cooling water chamber and the reaction chamber, and each of the metal fuel channels is connected to the metal fuel delivery pipe;

[0009] The oxidant channel includes a plurality of first oxidant channels, which are distributed around the metal fuel channel, and the central axis of each first oxidant channel is set at a preset angle to the central axis of the metal fuel channel.

[0010] In some embodiments, a plurality of metal fuel delivery pipes are provided, the number of the metal fuel delivery pipes is positively correlated with the power of the metal fuel reaction exothermic device, the number of the metal fuel channels is the same as the number of the metal fuel delivery pipes, and each metal fuel delivery pipe is connected to a corresponding metal fuel channel.

[0011] In some embodiments, the diameter of the metal fuel delivery pipe is greater than the minimum speed required for the metal fuel to be smoothly pushed by the carrier gas, and the flow rate of the metal fuel and the carrier gas entering the reaction chamber is 0.1-1 m / s;

[0012] At least four first oxidant channels are evenly distributed around each of the metal fuel channels, and each of the first oxidant channels is inclined toward the central axis of the reaction chamber, with an inclination angle of 10°-45°.

[0013] In some embodiments, the oxidant channel further includes a plurality of second oxidant channels, and the plurality of second oxidant channels are distributed on the separator, and the central axis of the second oxidant channel is parallel to or at a preset angle to the central axis of the metal fuel channel.

[0014] In some embodiments, the number of the oxidant delivery tubes is positively correlated with the power of the metal fuel reaction exothermic device;

[0015] The flow rate of the oxidant in the oxidant delivery pipe entering the reaction chamber is 0.7-2 times the flow rate of the metal fuel and the carrier gas.

[0016] In some embodiments, the plurality of cooling water channels are evenly distributed on the partition, the number of the cooling water channels is not less than 100, and the diameter of the cooling water channels is 0.05 mm to 0.5 mm;

[0017] The partition is manufactured by 3D printing.

[0018] In some embodiments, the metal fuel delivery pipe inputs metal fuel and carrier gas into the reaction chamber, the mass ratio of the carrier gas to the metal fuel is 0.2-0.6, the carrier gas is at least one of nitrogen, hydrogen, and carbon dioxide, and the metal fuel is at least one of aluminum powder and magnesium powder;

[0019] When the metal fuel delivery pipe is started, a combustion-supporting gas is also input into the reaction chamber. The combustion-supporting gas includes at least one of methane, propane, and hydrogen.

[0020] In some embodiments, the oxidant inlet pipe inputs one of oxygen, water vapor, or an oxygen-water vapor mixture into the oxidant chamber;

[0021] The cooling water inlet pipe inputs mist cooling water into the cooling water chamber, and the mist cooling water is evenly dispersed on the top of the partition. The mist cooling water absorbs the heat transferred from the reaction chamber through the partition and begins to boil and evaporate, and is sprayed into the reaction chamber through the cooling water channel.

[0022] In some embodiments, a high temperature resistant layer is provided on the inner wall of the shell, and the high temperature resistant layer has a temperature resistance of not less than 2200°C.

[0023] In some embodiments, the reaction temperature in the reaction chamber is controlled at 1800° C.-2600° C., the ratio of the oxidant mass flow rate to the metal fuel mass flow rate is 1.2-3.5, and the ratio of the cooling water mass to the metal fuel mass is 0.5-4.

[0024] Compared with the prior art, the metal fuel reaction exothermic device provided by the present invention has at least one of the following beneficial effects:

[0025] In the present invention, the metal fuel is divided into several branches according to different powers to enter the reaction chamber, which promotes the uniform distribution of the metal fuel, improves its contact rate with the oxidant, and thus accelerates combustion; the oxidant is organized to enter the reaction chamber in layers, with one part used to impact the metal fuel and the other part used to suppress radial flow; and a large number of cooling water channels are arranged to form a uniform downward water vapor flow, further suppressing the radial flow in the reaction chamber throughout the entire space; thereby achieving efficient reaction of the metal fuel, and realizing the "push-flat" effect of the reaction flow, greatly reducing the wall adhesion rate of solid particles.

[0026] This device has the advantage of strong versatility. Since the reaction has good spatial uniformity in the reaction chamber, this configuration can be adopted by metal fuel reaction exothermic devices of different powers. It can be achieved by increasing the geometric dimensions and simultaneously adding or removing components such as metal fuel delivery pipes and oxidant delivery pipes.

[0027] The combustion temperature of this device is highly adjustable. This device adopts a diffusion combustion method, and the enhanced mixing of metal fuel and oxidant is fully considered when organizing the combustion. By adjusting the composition and flow of the oxidant and the flow of cooling water, the combustion temperature can be adjusted to a certain extent while ensuring stable combustion.

[0028] The structure of this device is safe. The inner wall of the reaction chamber is made of refractory material, and a sufficient number of cooling water channels are arranged on the partition. On the one hand, the cooling water can absorb heat in the channels and cool the partition to prevent burning; on the other hand, the boiling of the cooling water in the cooling water channels generates a pressure wave, which greatly reduces the diffusion of metal or metal oxide molten particles produced by the reaction and their adhesion to the lower layer of the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following will explain optional implementation methods in a clear and easy-to-understand manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0030] Figure 1 This is a schematic structural diagram of a metal fuel reaction exothermic device according to an optional embodiment of the present invention;

[0031] Figure 2 is a cross-sectional view of a metal fuel reaction exothermic device according to an optional embodiment of the present invention;

[0032] Figure 3 is a cross-sectional view of a partition according to an alternative embodiment of the present invention;

[0033] Figure 4 is a top view of a partition according to an alternative embodiment of the present invention;

[0034] Figure 5 Schematic diagram of the distribution of solid particles in the reaction chamber of an optional embodiment of the present invention.

[0035] Description of Figure Numbers:

[0036] Shell 1, oxidant chamber 11, oxidant inlet pipe 111, cooling water chamber 12, cooling water inlet pipe 121, reaction chamber 13, metal fuel delivery pipe 131, top cover 14, outlet 15, inner wall 16, igniter 17, distribution plate 2, oxidant delivery pipe 21, partition 3, oxidant channel 31, cooling water channel 32, metal fuel channel 33, fixed particles 4. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0038] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0039] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In one embodiment, the reference Figures 1 to 5The present invention provides a metal fuel reaction exothermic device, comprising: a shell 1, a distribution plate 2 and a partition 3 are arranged in the shell 1, the distribution plate 2 and the partition 3 divide the internal space of the shell 1 into an oxidant chamber 11, a cooling water chamber 12 and a reaction chamber 13, an outer wall of the shell 1 is provided with an oxidant inlet pipe 111, a cooling water inlet pipe 121 and a metal fuel delivery pipe 131, the oxidant inlet pipe 111 is connected to the oxidant chamber 11, and the cooling water inlet pipe 121 is connected to the cooling water chamber 12; the partition 3 is provided with a plurality of oxidant channels 31, a plurality of cooling water channels 32 and several metal fuel channels 33, each oxidant channel 31 is connected to the oxidant chamber 11 through the oxidant delivery pipe 21, each cooling water channel 32 is connected to the cooling water chamber 12 and the reaction chamber 13, and each metal fuel channel 33 is connected to the metal fuel delivery pipe 131; the oxidant channel 31 includes several first oxidant channels, and the several first oxidant channels are distributed on the circumference of the metal fuel channel 33, and the central axis of each first oxidant channel is set at a preset angle to the central axis of the metal fuel channel 33.

[0043] In this embodiment, the metal fuel can be divided into several branches according to different powers to enter the reaction chamber 13, thereby promoting uniform distribution of the metal fuel, improving its contact rate with the oxidant, and thus accelerating combustion; by organizing the oxidant to enter the reaction chamber 13 in layers, a part is used to impact the metal fuel, and the other part is used to suppress radial flow; and by arranging a large number of cooling water channels 32, a uniform downward water vapor flow can be formed, further suppressing the radial flow in the reaction chamber throughout the entire space; thereby achieving efficient reaction of the metal fuel, and realizing a "flat push" effect of the reaction flow, which greatly reduces the wall adhesion rate of solid particles.

[0044] In one embodiment, the reference Figures 1 to 5 Multiple metal fuel delivery pipes 131 are provided. The number of metal fuel delivery pipes 131 is positively correlated with the power of the metal fuel reaction exothermic device. The number of metal fuel channels 33 is the same as the number of metal fuel delivery pipes 131, and each metal fuel delivery pipe 131 is connected to a corresponding metal fuel channel 33. The top end of the metal fuel delivery pipe 131 extends a certain length through the top cover 14 of the shell 1, and the bottom end of the metal fuel delivery pipe 131 is welded and fixed to the partition 3. The diameter of the metal fuel delivery pipe 131 is greater than the minimum speed required for the metal fuel to be smoothly propelled by the carrier gas, while also taking into account the long-term residence of the metal fuel in the reaction chamber 13 at low speeds to improve efficiency. The flow rate of the metal fuel and carrier gas entering the reaction chamber 13 is 0.1-1 m / s. For example, if the reaction exothermic power of this device is 15 kW and the number of metal fuel delivery pipes 131 is 3, the flow rate of the metal fuel and carrier gas entering the reaction chamber is 0.8 m / s.

[0045] The number of oxidant delivery tubes 21 is positively correlated with the power of the metal-fuel reaction exothermic device. The oxidant delivery tubes 21 connect the distribution plate 2 and the partition 3, with the outlet end of the oxidant delivery tube 21 welded to the partition 3. The flow rate of the oxidant in the oxidant delivery tubes 21 entering the reaction chamber 13 is 0.7-2 times the flow rate of the metal fuel and carrier gas. For example, a total of 26 oxidant delivery tubes 21 are used, and the flow rate of the oxidant entering the reaction chamber is 1.2 m / s.

[0046] This device has the advantage of strong versatility. Since the reaction has good spatial uniformity in the reaction chamber, this configuration can be adopted by metal fuel reaction exothermic devices of different powers. It can be achieved by increasing the geometric dimensions and simultaneously adding or removing components such as metal fuel delivery pipes and oxidant delivery pipes.

[0047] The separator 3 is provided with several oxidant channels 31, several cooling water channels 32, and several metal fuel channels 33. The bottom of the metal fuel delivery pipe 131 can be inserted into the metal fuel channel 33, and the bottom of the oxidant delivery pipe 21 can be inserted into the oxidant channel 31. There are two types of oxidant channels 31: primary oxidant channels and secondary oxidant channels. Each metal fuel channel 33 is surrounded by at least four primary oxidant channels. Each primary oxidant channel is tilted toward the central axis of the reaction chamber 13 at an angle of 10°-45°, designed to collide with the metal fuel ejected from the metal fuel delivery pipe 131 and enhance mixing. Secondary oxidant channels serve as supplementary channels. Several secondary oxidant channels are evenly distributed on the separator 3. Depending on the reaction requirements, the central axis of the secondary oxidant channel can be aligned parallel to or at a specific angle to the central axis of the metal fuel channel 33.

[0048] Several cooling water channels 32 are evenly distributed on the partition 3, the number of the cooling water channels 32 is not less than 100, and the diameter of the cooling water channels 32 is 0.05mm-0.5mm; the partition 3 can be manufactured by 3D printing, and of course other processing methods can also be selected according to actual conditions.

[0049] The metal fuel delivery pipe 131 delivers metal fuel and carrier gas into the reaction chamber 13. The mass ratio of carrier gas to metal fuel is 0.2-0.6. The carrier gas is at least one of nitrogen, hydrogen, and carbon dioxide, and the metal fuel is at least one of aluminum powder and magnesium powder. During startup, the metal fuel delivery pipe 131 can also deliver a combustion-supporting gas into the reaction chamber 13. The combustion-supporting gas includes at least one of methane, propane, and hydrogen. For example, methane is used as the combustion-supporting gas.

[0050] Oxidant inlet pipe 111 delivers one of oxygen, water vapor, or an oxygen-water vapor mixture into oxidant chamber 11. Oxidant enters oxidant chamber 11 through oxidant inlet pipe 111 and flows evenly through distribution plate 2 into oxidant delivery pipe 21 before being ejected from oxidant channels 31. A portion of the oxidant is ejected from the first oxidant channel, impacting the metal fuel at a specific angle to promote mixing and enhanced combustion. Another portion is ejected from the second oxidant channel, participating in the reaction while also suppressing radial movement of solid particles 4 within reaction chamber 13, promoting the propulsive reaction.

[0051] The cooling water inlet pipe 32 is connected to the cooling water supply system, and the cooling water can be sprayed into the cooling water inlet pipe 32. After the cooling droplets enter the cooling water chamber 12, they are evenly dispersed on the upper layer of the partition 3, and after absorbing the heat transferred through the partition 3, they begin to boil and evaporate, and are sprayed into the reaction chamber 13 through the cooling water channel 32. It plays three roles: first, it cools the partition 3 to prevent burning; second, it generates a pressure wave through the boiling of the cooling water in the cooling water channel 32, which greatly reduces the diffusion of the metal or metal oxide molten particles produced by the reaction and then adheres to the lower layer of the partition; third, the direction of the water vapor velocity sprayed through the cooling water channel 32 is parallel to the metal fuel channel 33, which suppresses the radial movement of the solid particles 4 in the reaction chamber 13 and promotes the reaction to proceed in parallel. After the design and structure are finalized, the motion trajectory of the solid particles 4 obtained by simulation calculation is as shown below. Figure 5 shown.

[0052] The reaction chamber 13 is the main location for the reaction, where the metal fuel combustion reaction occurs. The inner wall 16 of the shell 1 is provided with a high-temperature resistant layer with a temperature resistance of no less than 2200°C. By controlling the composition and flow rate of the oxidant, as well as the flow rate of cooling water, the reaction products and reaction temperature are controlled. The reaction temperature in the reaction chamber 13 is controlled between 1800°C and 2600°C to ensure efficient reaction. The ratio of the oxidant mass flow rate to the metal fuel mass flow rate is 1.2-3.5, and the ratio of the cooling water mass flow rate to the metal fuel mass flow rate is 0.5-4. For example, the design is based on a reaction temperature of 2100°C in the reaction chamber; the mass flow rate ratio of the oxidant to the metal fuel is 2.8, the water vapor in the oxidant is 1.8 times the mass flow rate of the metal fuel, and the oxygen is 1 times the mass flow rate of the metal fuel; and the mass ratio of the cooling water to the metal fuel is 0.7 times.

[0053] The igniter 17 is selected based on whether combustion-supporting gas is required for startup. If combustion-supporting gas is used for startup, a spark plug is recommended; if the metal fuel is to be ignited directly, a plasma ignition method is recommended. The outlet 15 at the bottom of the housing 1 can be designed with corresponding subsequent devices according to user needs. For example, a radiant heat exchange furnace can be connected to the back end to absorb the high-quality heat at the device outlet for use in subsequent heat-requiring equipment.

[0054] The combustion temperature of this device is highly adjustable. This device adopts a diffusion combustion method, and the enhanced mixing of metal fuel and oxidant is fully considered when organizing the combustion. By adjusting the composition and flow of the oxidant and the flow of cooling water, the combustion temperature can be adjusted to a certain extent while ensuring stable combustion.

[0055] The structure of this device is safe. The inner wall of the reaction chamber is made of refractory material, and a sufficient number of cooling water channels are arranged on the partition. On the one hand, the cooling water can absorb heat in the channels and cool the partition to prevent burning; on the other hand, the boiling of the cooling water in the cooling water channels generates a pressure wave, which greatly reduces the diffusion of metal or metal oxide molten particles produced by the reaction and their adhesion to the lower layer of the partition.

[0056] The operating process of the present invention is as follows: During the startup phase, methane's ignitability is exploited to ensure reliable ignition, and combustion is continued for a period of time to establish the temperature within the reaction chamber. During the fuel switching phase, metal fuel is gradually introduced to replace methane to achieve a smooth transition. During the stabilization phase, the reaction temperature is adjusted based on heat demand by adjusting the cooling water flow rate and the water vapor flow rate in the oxidant.

[0057] The present invention takes into account reaction efficiency, aluminum oxide wall adhesion, and reliability. In terms of reaction efficiency, by diverting the metal fuel into several branches, each metal fuel branch passes through several oxidant branches, forming an enhanced mixing of the metal fuel and the oxidant across the entire cross-section of the reaction chamber, accelerating the reaction and improving the burnout rate. In terms of suppressing aluminum oxide wall adhesion, by arranging a portion of oxidant channels and a large number of cooling water vapor channels, an oxygen flow and a water vapor flow are formed in the direction of the axial outlet, suppressing the radial flow in the reaction chamber throughout the entire space of the reaction chamber, achieving a "flat push" effect, and suppressing the aluminum oxide from radial movement and wall adhesion. In terms of reliability, refractory materials are used on the inner wall of the reaction chamber, and a sufficient number of cooling water vapor channels are arranged on the top plate of the reaction chamber. On the one hand, the cooling water can absorb heat in the channels to cool the top plate of the reaction chamber to avoid burning; on the other hand, the pressure wave generated by the boiling of the cooling water in the cold water vapor channels greatly reduces the diffusion of the metal or metal oxide molten particles produced by the reaction and then adheres to the lower layer of the reaction chamber top plate.

[0058] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0059] It should be noted that the above embodiments can be freely combined as needed. The above are only optional implementations of the present invention. It should be pointed out that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A metal fuel reaction exothermic device, characterized in that: include: a shell, wherein a distribution plate and a partition are provided in the shell at intervals, wherein the distribution plate and the partition divide the internal space of the shell into an oxidant chamber, a cooling water chamber, and a reaction chamber; an oxidant inlet pipe, a cooling water inlet pipe, and a metal fuel delivery pipe are provided on the outer wall of the shell, wherein the oxidant inlet pipe is connected to the oxidant chamber, and the cooling water inlet pipe is connected to the cooling water chamber; The partition is provided with a plurality of oxidant channels, a plurality of cooling water channels and a plurality of metal fuel channels, each of the oxidant channels is connected to the oxidant chamber through an oxidant delivery pipe, each of the cooling water channels is connected to the cooling water chamber and the reaction chamber, and each of the metal fuel channels is connected to the metal fuel delivery pipe; The oxidant channel includes a plurality of first oxidant channels, which are distributed around the metal fuel channel, and the central axis of each first oxidant channel is set at a preset angle to the central axis of the metal fuel channel.

2. The metal fuel reaction exothermic device according to claim 1, characterized in that: There are multiple metal fuel delivery pipes, the number of which is positively correlated with the power of the metal fuel reaction exothermic device. The number of the metal fuel channels is the same as the number of the metal fuel delivery pipes, and each metal fuel delivery pipe is connected to the corresponding metal fuel channel.

3. The metal fuel reaction exothermic device according to claim 2, characterized in that: The diameter of the metal fuel delivery pipe is greater than the minimum speed required for the metal fuel to be smoothly pushed by the carrier gas, and the flow rate of the metal fuel and the carrier gas entering the reaction chamber is 0.1-1 m / s; At least four first oxidant channels are evenly distributed around each of the metal fuel channels, and each of the first oxidant channels is inclined toward the central axis of the reaction chamber, with an inclination angle of 10°-45°.

4. The metal fuel reaction exothermic device according to claim 1, characterized in that: The oxidant channel also includes a plurality of second oxidant channels, which are distributed on the partition plate. The central axis of the second oxidant channel is parallel to or at a preset angle to the central axis of the metal fuel channel.

5. The metal fuel reaction exothermic device according to claim 1, characterized in that: The number of the oxidant delivery pipes is positively correlated with the power of the metal fuel reaction exothermic device; The flow rate of the oxidant in the oxidant delivery pipe entering the reaction chamber is 0.7-2 times the flow rate of the metal fuel and the carrier gas.

6. The metal fuel reaction exothermic device according to claim 1, characterized in that: The plurality of cooling water channels are evenly distributed on the partition, the number of the cooling water channels is not less than 100, and the diameter of the cooling water channels is 0.05 mm to 0.5 mm; The partition is manufactured by 3D printing.

7. The metal fuel reaction exothermic device according to claim 1, characterized in that: The metal fuel delivery pipe inputs metal fuel and carrier gas into the reaction chamber, the mass ratio of the carrier gas to the metal fuel is 0.2-0.6, the carrier gas is at least one of nitrogen, hydrogen, and carbon dioxide, and the metal fuel is at least one of aluminum powder and magnesium powder; When the metal fuel delivery pipe is started, a combustion-supporting gas is also input into the reaction chamber. The combustion-supporting gas includes at least one of methane, propane, and hydrogen.

8. The metal fuel reaction exothermic device according to claim 1, characterized in that: The oxidant inlet pipe inputs one of oxygen, water vapor or oxygen-water vapor mixture into the oxidant chamber; The cooling water inlet pipe inputs mist cooling water into the cooling water chamber, and the mist cooling water is evenly dispersed on the top of the partition. The mist cooling water absorbs the heat transferred from the reaction chamber through the partition and begins to boil and evaporate, and is sprayed into the reaction chamber through the cooling water channel.

9. The metal fuel reaction exothermic device according to claim 1, characterized in that: The inner wall of the shell is provided with a high temperature resistant layer, and the high temperature resistant layer has a temperature resistance of not less than 2200°C.

10. The metal fuel reaction exothermic device according to claim 1, characterized in that: The reaction temperature in the reaction chamber is controlled at 1800° C.-2600° C., the ratio of the oxidant mass flow rate to the metal fuel mass flow rate is 1.2-3.5, and the ratio of the cooling water mass to the metal fuel mass is 0.5-4.

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