Integrated heat recycling type catalytic micro-burner for marine equipment and preparation method of integrated heat recycling type catalytic micro-burner

Abstract

The invention provides an integrated heat recycling type catalytic micro-combustor for marine equipment and a preparation method, and relates to the technical field of clean fuel catalytic combustion under the microscale. The integrated heat recycling type catalytic micro-combustor comprises a micro-combustor shell, and two sets of symmetrically-arranged partition plates are arranged on the inner side of the micro-combustor shell; the two sets of partition plates divide the interior of the miniature combustor shell into a first preheating channel, a gas outlet channel and a second preheating channel, the gas outlet channel comprises a combustion chamber and a gas outlet which are sequentially communicated, a bluff body is arranged on the inner side of the gas outlet channel, and concave cavities are formed in the partition plates and correspond to the combustion chamber in position. The inner side of the air outlet channel and the outer side of the bluff body are coated with a catalyst; according to the invention, the preheating channel is arranged to set the micro-combustor to be in a backheating form, unburned gas in the micro-combustor is preheated by tail gas after gas intake, so that the gas obtains a higher initial temperature in the micro-combustor, and the design optimizes the high-speed limit of mixed gas in the micro-combustor, strengthens the heat cycle in the combustor and effectively reduces the heat loss.

Description

Technical Field

[0001] The present invention relates to the technical field of clean fuel catalytic combustion at a micro scale, and in particular to an integrated heat recirculation catalytic micro burner for marine equipment and a preparation method thereof. Background Art

[0002] With the continuous growth of global energy demand and the increasing requirements for environmental protection, the development and application of marine clean energy has become an important research direction. In particular, seawater hydrogen production technology, by decomposing water molecules in seawater into hydrogen and oxygen, provides a sustainable and environmentally friendly energy solution for marine equipment. At the same time, with the in-depth advancement of marine resource development and marine environmental monitoring, the types and quantities of marine equipment continue to grow, such as the application of offshore thermal photovoltaics, unmanned offshore energy supply equipment (unmanned surface vessels (USV), autonomous underwater vehicles (AUV)), and offshore emergency power supply equipment. These technical equipment are often located in areas far away from energy supply and need to operate for a long time. Therefore, the demand for energy supply for marine equipment should meet the following key requirements:

[0003] 1. High power density; provide sufficient energy and power output for marine equipment;

[0004] 2. Miniaturization and lightweight: The space and load of marine equipment are limited, requiring energy devices to be compact and efficient;

[0005] 3. Environmental adaptability: Able to operate stably in harsh offshore environments, such as high humidity, high salt, low temperature and other extreme conditions.

[0006] At present, many marine equipment rely on technologies such as traditional electrochemical batteries and renewable energy for energy supply, but these technologies have problems such as limited endurance and unstable energy supply in deep sea or high temperature environments. In contrast, micro-combustion technology, as a new energy technology based on clean energy (such as natural gas, hydrogen, etc.), directly converts the chemical energy of fuel into thermal energy or electrical energy through microscale combustion, showing significant advantages. Micro-burners not only have higher energy density, but also have lightweight and compact designs, which are easy to integrate into marine equipment. Its ability to operate stably in high salt fog, high humidity and low temperature environments makes it an ideal energy solution for marine equipment. In addition, the heat generated by the combustion of micro-burners can also be used for equipment insulation and antifreeze, thereby improving the reliability of the equipment in extreme environments.

[0007] Micro-combustion technology has broad application prospects in the marine environment. Micro-combustion can provide more reliable and flexible energy support for marine equipment through the integration of multiple technologies such as cogeneration, intelligent control, power systems, and compatibility with clean fuels such as hydrogen, especially in long-term autonomous missions and extreme environmental conditions. Integrated micro-combustion can be used as a power source for unmanned equipment at sea, providing continuous and stable energy support. Furthermore, micro-combustion technology combined with seawater hydrogen production technology or offshore thermal photovoltaic technology can form a self-sufficient clean energy system, providing a continuous and stable energy supply for marine equipment, thereby promoting the green development and sustainable operation of marine equipment.

[0008] As the core functional module of marine technical equipment, the integrated micro burner can not only independently provide energy support for marine equipment, but also serve as a supplementary energy source to provide a stable energy source for traditional energy equipment in harsh marine environments. The micro burner is a device based on microscale combustion, which uses a micro combustion chamber, efficient combustion technology and heat recovery mechanism to achieve effective energy output. Although micro combustion technology has significant advantages, such as high energy density, miniaturized design and efficient energy conversion, its practical application in marine environments still faces a series of technical challenges. First, the combustion efficiency of the micro burner may be significantly reduced in high humidity and low oxygen environments. This is because the micro burner has a relatively large surface area compared to traditional combustion devices, resulting in severe wall heat dissipation and easy flame extinguishing. Secondly, due to the short residence time of the reactants in the microscale combustion process, the insufficient mixing of the fuel and the oxidant, and the change of the reaction flow characteristics, the instability of the combustion reaction may be caused, thereby affecting the combustion efficiency. These problems will directly affect the stability of marine equipment, thereby limiting its application under long-term and high reliability requirements. Therefore, the present invention proposes an integrated heat recirculation catalytic micro burner and preparation method for marine equipment to solve the problems existing in the prior art. Summary of the invention

[0009] In view of the above problems, the purpose of the present invention is to propose an integrated heat recirculation catalytic micro burner for marine equipment and a preparation method. This integrated heat recirculation catalytic micro burner for marine equipment and a preparation method have the advantages of improving the combustion instability of microscale burners with a larger surface ratio, promoting full combustion reaction, increasing heat release, and ultimately improving combustion efficiency, thereby solving the problems existing in the prior art.

[0010] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: an integrated heat recirculation catalytic micro burner for marine equipment, comprising a micro burner shell, two groups of symmetrically arranged partitions are provided on the inner side of the micro burner shell, the two groups of partitions divide the inside of the micro burner shell into a first preheating channel, an air outlet channel and a second preheating channel, the first preheating channel, the air outlet channel and the second preheating channel are connected, the air outlet channel includes a combustion chamber and an air outlet connected in sequence, a blunt body is provided on the inner side of the air outlet channel, a concave cavity is provided on the partition, and the position of the concave cavity corresponds to the combustion chamber, and the inner side of the air outlet channel and the outer side of the blunt body are coated with a catalyst.

[0011] A further improvement is that air inlets are provided on both sides of the micro-burner housing, and the air inlets on both sides are respectively connected to the first preheating channel and the second preheating channel.

[0012] A further improvement is that the catalyst is a Pt-based catalyst.

[0013] A further improvement is that the bluff body is a regular triangle column or a square column.

[0014] A method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment comprises the following steps:

[0015] S1. Preparation and treatment of micro burners

[0016] The micro burner shell is printed by a 3D printing method. After printing is completed, the unmelted powder around the micro burner is cleaned, and the micro burner shell is placed in a cleaning agent for heating and soaking. After soaking, it is washed with clean water until there is no obvious cleaning agent residue, and then dried;

[0017] S2. Preparation of Pt-based catalyst slurry

[0018] Under room temperature, Pt / Al2O3 catalyst powder, mixed solvent and binder are uniformly mixed by ultrasonic mixing equipment to prepare Pt-based catalyst slurry;

[0019] S3, spraying

[0020] The inner wall of the gas outlet channel and the bluff body are cleaned and roughened, and then the Pt-based catalyst slurry is sprayed on the inner wall of the gas outlet channel and the bluff body by using an electrostatic spraying device;

[0021] S4. Drying and curing

[0022] The micro burner is heated at 150-200°C for two hours and the preparation is completed after natural cooling.

[0023] A further improvement is that the 3D printing method is a laser selective melting method or an electron beam melting method.

[0024] A further improvement is that the mixed solvent is deionized water and ethylene glycol solvent, and the adhesive is polytetrafluoroethylene or carboxymethyl cellulose.

[0025] A further improvement is that the mass ratio of the Pt / Al2O3 catalyst powder, deionized water, ethylene glycol solvent and adhesive is 3:8:8:1.

[0026] A further improvement is that the Pt-based catalyst uses Al2O3 as a carrier and 0.5-5% of Pt as an active component.

[0027] The beneficial effects of the present invention are:

[0028] (1) The present invention relies on the concept of heat recirculation. By setting a preheating channel, the micro burner is set to a heat recovery form. After the intake, the unburned gas is preheated by the exhaust gas, so that the gas obtains a higher initial temperature in the micro burner. This design optimizes the high-speed limit of the mixed gas in the micro burner, strengthens the heat cycle in the burner, and effectively reduces heat loss. The characteristics of the present invention are to strengthen the heat release and promote the stable combustion of the fuel.

[0029] (2) The present invention provides a columnar blunt body and a concave cavity structure in the combustion chamber of the micro-combustor, and the mixed fuel forms a low-speed flow and a reflux area when flowing through these concave cavities and blunt body areas. In the combustion chamber, the low-speed section and the reflux area help to extend the residence time of the reactants, which is beneficial to the mixing of the fuel and the balance of the combustion reaction. At the same time, it also promotes the accelerated reflux of heat, increases the temperature of the unburned mixed gas, and provides preheating for the newly added gas, thereby promoting the complete combustion of the fuel and improving the combustion efficiency of the fuel.

[0030] (3) The present invention coats a Pt-based catalyst on the wall of the preheating channel of the micro-burner. The catalyst can effectively reduce the activation energy required for the combustion of fuel in the micro-channel, improve the flameout of free radicals, and thus accelerate the reaction speed. In addition, the reaction of the fuel on the catalytic surface can release heat energy and increase the temperature of the combustion chamber, which helps to maintain the uniformity and stability of the overall temperature of the burner. At the same time, the catalyst uses Pt as the active component and Al2O3 as the carrier to prepare a Pt / Al2O3 catalyst. The Pt / Al2O3 catalyst can effectively improve the catalytic activity of the reactants and the thermal stability at high temperatures. In addition, this solution not only optimizes the precious metal Pt catalyst, but also uses Al2O3 as a carrier to reduce the cost of using Pt.

[0031] (4) The present invention uses 3D printing technology to manufacture micro combustion chambers, which can bring significant advantages to the design and manufacture of micro burners, including design flexibility, manufacturing accuracy, material selection, and system integration production efficiency. It can effectively improve the accuracy of burners in specific environments and meet the needs of efficient and reliable energy supply in extreme environments such as the ocean. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0033] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0034] Figure 3 It is a front view structural schematic diagram of the present invention.

[0035] Figure 4 It is a schematic diagram of the temperature change distribution in the micro burner under different inlet velocities of the present invention.

[0036] Figure 5 It is a schematic diagram of OH concentration distribution in the micro burner at different inlet velocities of the present invention.

[0037] Figure 6 It is a temperature comparison diagram of the present invention and the traditional rectangular microchannel at different inlet velocities.

[0038] Figure 7 This is a comparison diagram of the heat release of the present invention and the traditional rectangular microchannel at different inlet velocities.

[0039] Among them: 1. micro burner shell; 2. partition; 3. first preheating channel; 4. air outlet channel; 5. second preheating channel; 6. combustion chamber; 7. air outlet; 8. blunt body; 9. concave cavity; 10. air inlet. DETAILED DESCRIPTION

[0040] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0041] according to Figure 1-Figure 5 As shown, this embodiment proposes an integrated heat recirculation catalytic micro burner for marine equipment, including a micro burner housing 1, as shown in FIG. Figure 1 and Figure 2As shown, two groups of symmetrically arranged partitions 2 are provided on the inner side of the micro burner housing 1, and the two groups of partitions 2 divide the micro burner housing 1 into a first preheating channel 3, an air outlet channel 4 and a second preheating channel 5. At the same time, air inlets 10 are opened on both sides of the micro burner housing 1, and the air inlets 10 on both sides are respectively connected to the first preheating channel 3 and the second preheating channel 5. Therefore, the position of the air inlet 10 is the inlet end of the device, and the end of the air outlet channel 4 facing outward is the outlet end. The partition 2 is connected to the micro burner housing 1, and the materials thereof are consistent.

[0042] The first preheating channel 3, the gas outlet channel 4 and the second preheating channel 5 are connected. The gas outlet channel 4 includes a combustion chamber 6 and an air outlet 7 which are connected in sequence. A blunt body 8 is provided on the inner side of the gas outlet channel 4. The blunt body 8 is a regular triangular column or a square column. In this embodiment, a regular triangular column design is adopted. In another embodiment, a square column is adopted. At the same time, a concave cavity 9 is provided on the partition plate 2, and the position of the concave cavity 9 corresponds to the combustion chamber 6. The inner side of the gas outlet channel 4 and the outer side of the blunt body 8 are coated with a catalyst. The catalyst is a Pt-based catalyst, which is Pt / Al2O3.

[0043] Furthermore, the micro burner housing 1 and the combustion chamber 6 channel are rectangular tube-shaped. When working, the fuel gas enters the combustion chamber 6 through the air inlet 10 through the preheating channel (the first preheating channel 3 and the second preheating channel 5), passes through the concave cavity 9 and the blunt body 8 to form a reflux zone, and is discharged through the air outlet 7 after the combustion reaction occurs. For the concave cavity 9, it is located on the side close to the air inlet end of the combustion chamber 6 and is distributed in a trapezoidal shape. The angle of the trapezoidal cavity is 135°, and the ratio between the upper bottom and the height is 2:1. For the blunt body 8, the length of the blunt body 8 is the same as the width of the outlet channel 4, and it is located at the center height of the combustion chamber 6. The ratio of the height of the regular triangle columnar blunt body 8 to the height of the outlet channel 4 is 1:2.

[0044] In this embodiment, the micro-burner has an overall dimension of length: width: height of 14:6:5. The ratio of the micro-burner wall thickness to the preheating channel height is 0.5-1, and in this embodiment, it is preferably 0.5. The ratio of the preheating channel to the air outlet channel 4 height is 0.25-0.5, and in this embodiment, it is preferably 0.25. The ratio of the distance from the partition 2 to the inner wall of the micro-burner to the length of the air outlet channel 4 is 1:8.

[0045] The micro burner provided by the device is suitable for liquid or gaseous fuels. Preferably, the fuel gas is premixed methane / air or premixed hydrogen / air.

[0046] A method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment comprises the following steps:

[0047] S1. Preparation and treatment of micro burners

[0048] The micro burner shell 1 is printed out by a 3D printing method. Preferably, the micro burner shell 1 is made of 316L stainless steel or SiC material. In the present embodiment, it is 316L stainless steel. After printing, the unmelted powder around the micro burner 1 is cleaned, and the micro burner shell 1 is placed in a cleaning agent for heating and soaking. The cleaning agent is alcohol, and the heating temperature is 60°C. After soaking, it is washed with clean water until there is no obvious cleaning agent residue and then dried. Among them, the 3D printing method is a laser selective melting method or an electron beam melting method. In the present embodiment, the laser selective melting method is used. The basic principle of the laser selective melting method (SLM) and the electron beam melting method (EBM) is to use the three-dimensional model generated by computer-aided design (CAD) software to slice it into a series of continuous two-dimensional layers. Then, the high-energy laser beam emitted by the laser is controlled by the numerical control system, and according to the contour information of these layers, the powder in the metal powder bed is melted point by point and layer by layer to solidify it into a solid. This process is repeated until a complete three-dimensional part is finally formed.

[0049] S2. Preparation of Pt-based catalyst slurry

[0050] At room temperature (25±2°C), Pt / Al2O3 catalyst powder, mixed solvent and adhesive are uniformly mixed by ultrasonic mixing equipment, that is, ultrasonic mixing is used to prepare Pt-based catalyst slurry. In this embodiment, the Pt-based catalyst uses Al2O3 as a carrier and 0.5-5% of Pt as an active component. The Pt / Al2O3 catalyst has better thermal stability and catalytic activity than the Pt catalyst. The mixed solvent is deionized water and ethylene glycol solvent, and the adhesive is polytetrafluoroethylene (PTFE) or carboxymethyl cellulose (CMC). In this embodiment, polytetrafluoroethylene is used as the adhesive, and the mass ratio of Pt / Al2O3 catalyst powder, deionized water, ethylene glycol solvent and adhesive is 3:8:8:1.

[0051] Deionized water and ethylene glycol are used as mixed solvents in the Pt-based catalyst slurry, which has good solubility; the adhesive is polytetrafluoroethylene, which has excellent heat resistance and bonding properties.

[0052] S3, spraying

[0053] The inner wall of the outlet channel 4 and the bluff body 8 are cleaned and roughened. The surface cleaning method is to use a soft cloth dipped in alcohol and then wipe it, and then use a clean soft cloth to dry it. Then, a sandblasting method is used to spray fine abrasive particles (such as aluminum oxide) onto the surface under high-pressure airflow to increase the surface roughness. After the roughening treatment, the surface is cleaned again, and then an electrostatic spraying device is used to spray the Pt-based catalyst slurry on the inner wall of the outlet channel 4 and the bluff body 8;

[0054] S4. Drying and curing

[0055] The micro burner is heated at 150-200°C for two hours and the preparation is completed after natural cooling.

[0056] Figure 4 and Figure 5 This is a schematic diagram of the OH concentration distribution of the temperature change in the micro burner under different inlet velocities of the embodiment of the present invention when the equivalence ratio is 1. When the inlet velocity reaches 5m / s, the mixed gas is still not blown out, and the temperature in the combustion chamber increases with the increase of the inlet velocity, and a stable combustion area is formed on the rear side of the bluff body.

[0057] Figure 6 The temperature comparison between the embodiment of the present invention and the traditional rectangular microchannel at different inlet velocities, wherein (a) the traditional rectangular microchannel; (b) the heat recirculation catalytic micro burner of the present invention. The traditional rectangular microchannel is blown out after the inlet velocity is 0.9 m / s, while the embodiment of the present invention is still not blown out at 5 m / s. The present invention can effectively increase the inlet velocity of the mixed gas, increase the blow-out limit of the mixed gas, and enhance the stable combustion effect.

[0058] Figure 7 The figures are a comparison of the heat release of the embodiments of the present invention and the traditional rectangular microchannel at different inlet velocities, wherein (a) is the traditional rectangular microchannel; (b) is the heat recirculation catalytic micro burner of the present invention. The maximum heat release of the traditional rectangular microchannel is 31.6W when the inlet velocity is 0.9m / s, and the heat release of the embodiments of the present invention are 24.1W, 47W, 69.4W, 86.6W and 104.5W at 1m / s, 2m / s, 3m / s, 4m / s and 5m / s respectively. The heat generated by the combustion of the mixed gas is much greater than that of the traditional rectangular burner, which also shows that the present invention is conducive to the full reaction of the fuel, promotes the stable combustion of the fuel, and enhances the heat release.

[0059] Combined with the first and second embodiments, and the attached Figure 4 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 The present invention relies on the concept of heat recirculation and sets the micro burner in a heat recovery form by providing a preheating channel. The unburned gas in the intake channel is preheated by the exhaust gas, so that the gas obtains a higher initial temperature in the micro burner. This design optimizes the high-speed limit of the mixed gas in the micro burner, strengthens the heat cycle in the burner, and effectively reduces heat loss.

[0060] The present invention sets a columnar blunt body 8 and a concave cavity 9 structure in the combustion chamber 6 of the micro-combustor, and the mixed fuel forms a low-speed flow and reflux area when flowing through these concave cavities 9 and the blunt body 8 area. In the combustion chamber 6, the low-speed section and the reflux area help to extend the residence time of the reactants, which is beneficial to the mixing of the fuel and the balance of the combustion reaction. At the same time, it also promotes the accelerated reflux of heat, increases the temperature of the unburned mixed gas, and provides preheating for the newly added gas, thereby promoting the complete combustion of the fuel and improving the combustion efficiency of the fuel.

[0061] A Pt-based catalyst is further introduced, which can effectively reduce the activation energy required for the combustion of fuel in the microchannel, improve the flameout of free radicals, and thus accelerate the reaction speed. In addition, the reaction of the fuel on the catalytic surface can release heat energy and increase the temperature of the combustion chamber 6, which helps to maintain the uniformity and stability of the overall temperature of the burner. At the same time, the catalyst uses Pt as the active component and Al2O3 as the carrier to prepare a Pt / Al2O3 catalyst. The Pt / Al2O3 catalyst can effectively improve the catalytic activity of the reactants and the thermal stability at high temperatures. In addition, this solution optimizes the precious metal Pt catalyst while using Al2O3 as a carrier to reduce the cost of using Pt.

[0062] The present invention uses 3D printing technology to manufacture a micro burner that optimizes airflow distribution and thermal management, and uses a heat recirculation mechanism to significantly improve combustion efficiency. At the same time, the catalytic activity of fuel and oxidant is improved through the application of catalysts, thereby solving the problems of unstable combustion and low efficiency that may occur in micro burners in marine environments, improving the stability and energy output capacity of micro burners in harsh marine environments, and providing strong technical support for the reliable operation of marine equipment.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the framework and scope of application of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An integrated heat recirculating catalytic micro-combustor for marine equipment, characterized in that: The invention comprises a micro burner shell (1), wherein two groups of symmetrically arranged partitions (2) are provided on the inner side of the micro burner shell (1), and the two groups of partitions (2) divide the inside of the micro burner shell (1) into a first preheating channel (3), an air outlet channel (4) and a second preheating channel (5); the first preheating channel (3), the air outlet channel (4) and the second preheating channel (5) are connected to each other; the air outlet channel (4) comprises a combustion chamber (6) and an air outlet (7) which are connected in sequence; a blunt body (8) is provided on the inner side of the air outlet channel (4); a concave cavity (9) is provided on the partition (2), and the position of the concave cavity (9) corresponds to the combustion chamber (6); and the inner side of the air outlet channel (4) and the outer side of the blunt body (8) are coated with a catalyst.

2. An integrated heat recirculation catalytic micro burner for marine equipment and a preparation method according to claim 1, characterized in that: Air inlets (10) are provided on both sides of the micro-burner housing (1), and the air inlets (10) on both sides are respectively connected to the first preheating channel (3) and the second preheating channel (5).

3. The integrated heat recirculation catalytic micro-combustor for marine equipment and the preparation method according to claim 1 are characterized in that: The catalyst is a Pt-based catalyst.

4. The integrated heat recirculation catalytic micro-combustor for marine equipment and the preparation method according to claim 1 are characterized in that: The bluff body (8) is a regular triangle column or a square column.

5. A method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment as claimed in claim 1, characterized in that: The following steps are involved: S1. Preparation and treatment of micro burners The micro burner housing (1) is printed by a 3D printing method. After printing is completed, the unmelted powder around the micro burner (1) is cleaned, and the micro burner housing (1) is placed in a cleaning agent for heating and soaking. After soaking, the micro burner housing (1) is washed with clean water until no obvious cleaning agent residue remains, and then dried; S2. Preparation of Pt-based catalyst slurry Under room temperature, Pt / Al2O3 catalyst powder, mixed solvent and binder are uniformly mixed by ultrasonic mixing equipment to prepare Pt-based catalyst slurry; S3, spraying The inner wall of the gas outlet channel (4) and the bluff body (8) are cleaned and roughened, and then a Pt-based catalyst slurry is sprayed on the inner wall of the gas outlet channel (4) and the bluff body (8) using an electrostatic spraying device; S4. Drying and curing The micro burner is heated at 150-200°C for two hours and the preparation is completed after natural cooling.

6. The method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment according to claim 5, characterized in that: The 3D printing method is a laser selective melting method or an electron beam melting method.

7. The method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment according to claim 5, characterized in that: The mixed solvent is deionized water and ethylene glycol solvent, and the adhesive is polytetrafluoroethylene or carboxymethyl cellulose.

8. The method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment according to claim 7, characterized in that: The mass ratio of the Pt / Al2O3 catalyst powder, deionized water, ethylene glycol solvent and adhesive is 3:8:8:

1.

9. The method for preparing an integrated heat recirculation catalytic micro-combustor for marine equipment according to claim 5, characterized in that: The Pt-based catalyst uses Al2O3 as a carrier and 0.5-5% of Pt as an active component.

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