Solid powder combustion power system

Abstract

This invention provides a solid powder combustion power system, including a combustion power unit and an atomizing device. The combustion power unit consists of a powder inlet flange, a first-stage combustion chamber, an igniter assembly, and a tail nozzle connected coaxially in sequence. The atomizing device delivers solid powder into the combustion chamber via a pipeline through the powder inlet flange. The first-stage combustion chamber includes a water spray flange, a water inlet flange, and a connecting flange. Inner and outer pipes are installed between the water inlet flange and the connecting flange to form an annular sealed cooling water supply chamber, with the inner cavity of the inner pipe serving as the combustion chamber. The water inlet flange has a water inlet channel, and the water spray flange has a water spray channel with a water mist nozzle. The two are connected via a water supply channel with a switch valve, allowing water to be sprayed into the combustion chamber as needed. The igniter ignites the solid powder within the chamber, and the tail nozzle has a flame outlet for energy output. This system employs an integrated water-cooled structure on the combustion chamber wall, ensuring uniform cooling and facilitating installation and maintenance. The cooling water achieves uniform wall cooling and can also be sprayed into the combustion chamber to generate combustible gas, improving combustion efficiency and energy release.

Description

Technical Field

[0001] This invention relates to the field of combustion power system technology, and more specifically, to a solid powder combustion power system. Background Technology

[0002] Solid powder fuel power systems have broad application prospects in fields such as power propulsion and energy supply due to their advantages such as high fuel energy density and convenient storage and transportation. Metal solid powder fuels such as aluminum powder have become a research focus due to their high energy efficiency. However, the combustion of such fuels will generate extremely high temperatures, which can easily cause structural wall erosion, thermal deformation, and even deflagration and other safety problems, which put forward stringent requirements for the cooling and heat dissipation of the system and the improvement of combustion efficiency.

[0003] Existing solid powder combustion power systems mostly adopt a split cooling structure with external cooling pipes. The cooling channels and combustion chamber structural components are independent of each other. This not only results in complex structure and cumbersome assembly and maintenance, but also uneven cooling, which can easily lead to cooling dead zones, resulting in local hot spots, uneven thermal stress, wall cracks and other faults. It is difficult to adapt to the high temperature and high energy solid powder combustion conditions.

[0004] Therefore, developing a solid powder combustion power system that provides uniform cooling, high cooling efficiency, and improved combustion efficiency has become a key requirement for solving the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to solve the technical problems of uneven cooling, complex structure and low combustion efficiency in existing solid powder combustion power systems. In order to overcome the above-mentioned defects of the prior art, the present invention provides a solid powder combustion power system with an integrated water-cooled structure design, which provides uniform cooling and eliminates the need for external cooling structures, thereby achieving a dual improvement in cooling efficiency and combustion efficiency. At the same time, it has the characteristics of compact structure and convenient maintenance, and is suitable for high-temperature and high-energy combustion conditions of metal solid powder fuels such as aluminum powder.

[0006] To achieve the objectives of this invention, the following technical solutions are adopted: A solid powder combustion power system includes a combustion power unit and an atomizing device. The combustion power unit comprises a powder inlet flange, a first-stage combustion chamber, an igniter assembly, and a tail nozzle, all coaxially connected in sequence from the powder inlet to the powder outlet. The powder inlet flange has a powder inlet. The powder outlet of the atomizing device is connected to the powder inlet via a conveying pipeline. The first-stage combustion chamber comprises a water spray flange, a water inlet flange, and a connecting flange, all coaxially connected in sequence from the powder inlet to the powder outlet. The water spray flange is fixedly connected to the powder inlet flange, and the connecting flange is fixedly connected to the igniter assembly. An outer pipe and an inner pipe are coaxially arranged between the water inlet flange and the connecting flange, forming an annular and sealed loop. The cooling water supply chamber has an inner cavity that forms a through combustion chamber, which is connected to the powder inlet. A water inlet channel communicating with the cooling water supply chamber is provided on the water inlet flange. A water spray channel communicating with the combustion chamber is provided on the water spray flange, and a water mist nozzle is provided at the outlet of the water spray channel. A water supply channel communicating with the cooling water supply chamber is provided on the water inlet flange, and a switch valve for controlling the opening and closing of the water mist nozzle is provided on the water supply channel. The igniter assembly is connected to the combustion chamber and is used to ignite the solid powder fed into the combustion chamber. A flame nozzle communicating with the combustion chamber is provided axially at the end of the tail nozzle away from the igniter assembly. In this system, the atomizing device delivers solid powder to the combustion power unit. The combustion power unit integrates the cooling water supply chamber into the combustion chamber wall, forming a one-piece water-cooled structure. This ensures uniform cooling without the need for external cooling pipes, resulting in a compact structure that is easy to install and maintain. The design of the water spray channel and the on / off valve allows the cooling water to be sprayed into the combustion chamber as needed after absorbing heat. This not only cools the wall but also utilizes the water to react with the high-temperature powdered fuel to produce combustible gases such as hydrogen, significantly improving combustion efficiency and energy release. At the same time, the annular cooling water supply chamber ensures uniform coverage of the combustion chamber wall with cooling water, avoiding localized hot spots, reducing thermal stress and thermal deformation, and extending the life of the device.

[0007] Preferably, the water spray flange has a coaxially protruding cylindrical section near the powder inlet flange. A water mist nozzle, communicating with the water spray channel and the combustion chamber, is radially penetrated through the outer wall of the cylindrical section. The water mist nozzle is mounted on the water mist nozzle. A water storage tank is circumferentially arranged on the outer peripheral wall of the cylindrical section. A waterproof sleeve is fitted between the cylindrical section and the powder inlet flange, forming a water storage cavity with the water storage tank. This water storage cavity is connected to both the water mist nozzle and the water spray channel. The water storage cavity buffers fluctuations in water supply pressure, ensuring the continuity and stability of the water mist sprayed from the nozzle and preventing localized overheating due to momentary interruptions in water supply. Furthermore, the sealed structure formed by the waterproof sleeve and the water storage tank effectively prevents leakage of cooling water or high-pressure gas generated during the reaction, improving the operational safety of the device. Simultaneously, integrating the water storage function inside the flange eliminates the need for an additional water storage container, further reducing volume and weight.

[0008] Preferably, a second combustion chamber is provided between the igniter assembly and the tailpipe. The structure of the second combustion chamber is the same as that of the first combustion chamber, and they are axially symmetrically arranged on both sides of the igniter assembly. The second combustion chamber allows unreacted powdered fuel and water vapor to continue reacting, extending the reaction path and time, significantly improving the overall fuel combustion efficiency. Furthermore, the integrated water-cooling structure with two independent water supplies can adjust the water supply and pressure according to the different heat loads of each combustion chamber, achieving precise matching of cooling intensity and avoiding insufficient or excessive cooling. At the same time, for metallic fuels with extremely high combustion temperatures, such as aluminum powder, the multi-stage combustion chamber can distribute the heat load, reduce the heat flux density of a single section wall, and improve the reliability of the device.

[0009] It also includes a three-stage combustion chamber, which has the same structure as the two-stage combustion chamber. The first end of the three-stage combustion chamber is fixedly connected to the tail end of the two-stage combustion chamber, and the tail end of the three-stage combustion chamber is fixedly connected to the tail nozzle through a combustion chamber flange. The three-stage combustion chamber further extends the space and time for the water-fuel reaction, which is particularly suitable for fuels with larger powder particles or slightly lower reactivity, ensuring near-complete combustion of the fuel and maximizing the release of chemical energy. Furthermore, the use of combustion chamber modules with the same structure connected in series through flanges allows for flexible adjustment of the number of combustion chamber stages according to different power levels and application scenarios, enabling serialized design and reducing R&D and production costs. At the same time, the design of multiple identical stages makes the overall temperature distribution of the device more uniform, avoiding thermal stress concentration.

[0010] Preferably, the igniter assembly includes an annular igniter flange, an ignition coil, and an ignition base. One axial end face of the igniter flange is fixedly connected to one end face of a combustion chamber, and the other axial end face is fixedly connected to one end face of the tailpipe. The two ends of the ignition coil are fixedly connected to the inner circumferential walls on both sides of the igniter flange, and the middle section of the ignition coil is wound around the ignition base. The ignition bases are axially distributed, with the ignition head located closer to the combustion chamber. By winding the ignition coil around the ignition base and electrically heating it, the ignition head reaches the ignition point of the powder fuel, ensuring reliable ignition. The annular structure does not affect the central airflow or powder flow. Furthermore, the igniter assembly is integrated inside the flange, not occupying additional axial space, maintaining the overall compactness of the device. Simultaneously, the igniter flange isolates the ignition coil from the combustion chamber, preventing the flame from directly impacting the coil and extending the igniter's lifespan.

[0011] Preferably, the ignition coil is a copper tube, and an ignition cooling inlet channel connected to one end of the copper tube is connected to the igniter flange. This ignition cooling inlet channel is also connected to the cooling water supply chamber. An ignition cooling outlet channel connected to the other end of the copper tube is also connected to the ignition flange, and this outlet channel is connected to the cooling water supply chamber via an ignition water outlet pipe. By using a hollow copper tube as the ignition coil and circulating cooling water, the igniter can be effectively prevented from burning out in high-temperature environments, ensuring long-term stable operation. Furthermore, the cooling water flowing through the ignition coil absorbs heat from the igniter and then returns to the cooling water supply chamber or is used for subsequent reactions, achieving heat recovery and improving energy utilization. Simultaneously, the ignition cooling channel is connected to the main cooling water supply chamber, eliminating the need for a separate water source and simplifying the structure.

[0012] Preferably, the atomizing device includes a base, an atomizing tower, an air intake module, an air intake pipe, and a powder outlet pipe. The atomizing tower is vertically mounted on the base, and a vertically extending atomizing space is sealed inside the atomizing tower for storing solid powder fuel. The air intake module is fixedly installed at the bottom of the atomizing space, and includes a support cylinder, at least one perforated plate, and a fixing plate. The support cylinder is vertically mounted at the bottom of the atomizing space, the perforated plate is fixedly mounted on the top of the support cylinder, and the fixing plate is fixedly mounted on the top of the perforated plate. One end of the air intake pipe is connected to the bottom of the atomizing tower and is used to allow gas to pass sequentially through the support cylinder, the perforated plate, and the fixing plate into the atomizing space. The other end of the air intake pipe is connected to a gas supply mechanism, and the top of the atomizing tower is connected to the conveying pipeline. The powder outlet pipe is vertically mounted inside the atomizing space, and the upper end of the powder outlet pipe is connected to the conveying pipeline at the top of the atomizing tower. The lower end of the powder outlet pipe is spaced apart from the fixing plate and communicates with the atomizing space. Through the integrated sealed structure design of the base, atomizing tower, air intake module, air intake pipe and powder outlet pipe, the gas enters the atomization space after being guided through multiple stages by the air intake module, realizing the full mixing of solid powder fuel and carrier gas. With the interval setting of the vertical powder outlet pipe, the powder fuel forms a uniform atomized flow and is discharged from the powder outlet pipe. This not only realizes the continuous and stable supply of powder fuel, but also reduces dust leakage from the source by sealing the atomization space. At the same time, it solves the problems of easy blockage and material interruption in powder conveying, laying the structural foundation for efficient atomization.

[0013] Preferably, the atomizing tower includes an atomizing base plate, an atomizing top plate, and an atomizing cylinder. The atomizing cylinder is vertically connected between the atomizing base plate and the atomizing top plate, and the atomizing base plate, the atomizing top plate, and the atomizing cylinder together form a sealed atomizing space. A cylindrical connecting seat protrudes downward from the bottom surface of the atomizing top plate. An upper step is provided on the upper inner circumferential wall of the atomizing cylinder. The upper part of the atomizing cylinder is fitted onto the outside of the connecting seat. The upper end face of the atomizing cylinder abuts against the bottom surface of the atomizing top plate. The inner circumferential wall of the atomizing cylinder abuts tightly against the outer circumferential wall of the connecting seat, and the lower end face of the connecting seat abuts against the step surface of the upper step. A lower step is provided on the lower inner circumferential wall of the atomizing cylinder. The lower end of the atomizing cylinder is fitted onto the outside of the air intake module. The inner circumferential wall of the atomizing cylinder abuts tightly against the outer circumferential wall of the air intake module, and the top surface of the fixing plate abuts against the step surface of the lower step. The split structure and connection method of the atomizing tower are limited. The enclosed design of the atomizing bottom plate, top plate and cylinder makes the sealing performance of the atomizing space better. The abutting fit between the connecting seat and the upper step, and the air intake module and the lower step, realizes the precise positioning and tight assembly of each component of the atomizing tower. This avoids air leakage and component loosening problems when supplying high pressure, and ensures the sealing performance and structural stability of the atomizing device under high pressure conditions. At the same time, the split structure facilitates disassembly and maintenance.

[0014] Preferably, the atomizing cylinder has several vertically extending connecting rods evenly distributed circumferentially along its outer periphery. The upper end of each connecting rod is fixedly connected to the atomizing bottom plate, and the lower end of each connecting rod is fixedly connected to the atomizing top plate. The outer periphery of each connecting rod abuts against the outer periphery of the atomizing cylinder. The support cylinder, perforated plate, and fixed pressure plate are all circular structures with the same outer diameter, and are coaxially arranged. The outer periphery of the support cylinder, perforated plate, and fixed pressure plate are all tightly abutted against the inner periphery of the atomizing cylinder for fixation. The circumferential fixation of the atomizing cylinder by the connecting rods, combined with the tight abutment between the components of the air intake module and the inner periphery of the atomizing cylinder, further enhances the rigidity and stability of the overall atomizing tower structure, preventing component displacement and vibration under high-speed airflow impact. The coaxial design and consistent outer diameter of the components of the air intake module ensure the uniformity of vertical gas flow, avoiding uneven powder atomization caused by airflow deviation and improving the consistency of atomization effect. Preferably, two porous plates are used, stacked one on top of the other. Each porous plate has a number of micropores evenly distributed on it. The mesh size of the micropores is 200-1000 mesh, and the diameter of each micropore is 10-50 μm. A first weight-reducing hole is opened in the center of the fixed pressure plate, and a second weight-reducing hole is evenly distributed circumferentially along the outer periphery of the first weight-reducing hole on the fixed pressure plate. The distance between the lower end face of the powder outlet pipe and the top surface of the fixed pressure plate is 25-45 mm. By limiting the parameters of the two stacked porous plates and the micropores, the double-layer porous plates form a secondary airflow distribution. The 10-50 μm micropores and the 200-1000 mesh size cut the gas into ultra-fine high-speed airflow. The high-speed airflow exerts a strong shearing and crushing effect on the powder, effectively breaking up agglomerates of powders such as aluminum powder and breaking them into ultra-fine dispersed particles, significantly increasing the specific surface area of ​​the powder, and enhancing the entrainment effect of the airflow and powder, thereby improving the fineness and uniformity of atomization. By setting a central first weight-reducing hole and an outer peripheral second weight-reducing hole on the fixed pressure plate, the weight of the pressure plate itself is reduced, lowering the overall load of the device without affecting the structural support of the pressure plate. The distribution of the weight-reducing holes allows the airflow passing through the perforated plate to form uniform multi-jet streams, further enhancing the airflow's crushing and dispersing effect on the powder, while ensuring smooth airflow and avoiding airflow pressure loss caused by pressure plate obstruction. By limiting the distance of 25-45mm between the lower end of the powder outlet pipe and the top surface of the fixed pressure plate, this distance provides optimal buffer space for the mixing and atomization of powder and carrier gas. This ensures that the high-speed airflow has sufficient distance to fully disperse and entrain the powder, forming a uniform mist, while avoiding excessively large distances that would cause airflow velocity attenuation and powder sedimentation, preventing powder from being drawn up, or excessively small distances that would cause powder to be discharged before full atomization, leading to blockage. This ensures a balance between atomization effect and powder conveying efficiency.

[0015] The advantages of this invention are: through multi-stage airflow guidance and sealing structure design, ultra-fine uniform atomization and stable continuous supply of solid powder fuel are achieved, resulting in outstanding technical effects; after the carrier gas is initially divided by the diverter plate, it forms an ultra-fine high-speed jet through a double-layer porous plate with specific parameters, which powerfully breaks up powder agglomerates, increases the specific surface area of ​​the powder, and, combined with the optimal spacing of the powder outlet pipe, ensures the uniformity of the atomization flow, significantly improving the fuel combustion speed and burnout rate; the sealed atomization space combined with inert gas protection avoids dust leakage and static electricity accumulation problems from the source, reducing the risk of spontaneous combustion and dust explosion; the precise contact and circumferential fixing design of the multi-component atomizing tower enhances the structural rigidity and sealing of the device, making it suitable for extreme working conditions such as high temperature, high pressure, and underwater. Furthermore, the pressure indicator and the air pressure regulating valve work together to precisely control the air pressure in the atomization space, enabling controllable adjustment of airflow speed and powder concentration. This eliminates problems such as material blockage and interruption, fully releasing the high-energy characteristics of aluminum powder, and improving the system's energy and power density, providing reliable equipment support for the engineering application of solid powder fuels. Through multi-stage airflow guidance and sealing structure design, ultra-fine and uniform atomization and stable continuous supply of solid powder fuel are achieved, resulting in outstanding technical effects. After the carrier gas is initially split by the splitter plate, it forms an ultra-fine high-speed jet through a double-layer perforated plate with specific parameters, powerfully breaking up powder agglomerates, increasing the powder's specific surface area, and, combined with the optimal spacing of the powder outlet pipe, ensuring the uniformity of the atomization flow, significantly improving the fuel combustion speed and burnout rate. Attached Figure Description

[0016] Figure 1 is a structural schematic diagram of the solid powder combustion power system of the present invention. Figure 2 is a cross-sectional schematic diagram of the solid powder combustion power device of the present invention. Figure 3 is an exploded schematic diagram of the solid powder combustion power device of the present invention (from left to right). Figure 4 is an exploded schematic diagram of the solid powder combustion power device of the present invention (from right to left). Figure 5 is a structural schematic diagram of the igniter assembly of the present invention. Figure 6 is a structural schematic diagram of the tail nozzle of the present invention. Figure 7 is a structural schematic diagram of the atomizing device of the present invention. Figure 8 is a cross-sectional view of the atomizing device of the present invention. Figure 9 is an exploded schematic diagram of the atomizing tower of the present invention. Figure 10 is a structural schematic diagram of the atomizing tower connecting seat of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Powder inlet flange; 10. Conical surface; 11. Powder inlet port; 2. First stage combustion chamber; 201. Cooling water supply chamber; 202. Combustion chamber; 203. Water inlet channel; 204. Water spray channel; 205. Switch valve; 21. Outer pipe; 22. Inner pipe; 23. Water spray flange; 231. Cylindrical section; 232. Water mist nozzle; 233. Water storage tank; 24. Water inlet flange; 241. Water supply channel; 25. Connecting flange; 26. Waterproof sleeve; 3. Ignition assembly; 31. Ignition flange; 311. Ignition cooling inlet channel; 312. Ignition cooling outlet channel; 313. Ignition water outlet pipe; 32. Ignition coil; 321. Intermediate section; 33. Ignition base; 34. Ignition head; 4. Tail nozzle; 41. Flame nozzle ; 411. Main nozzle; 412. Auxiliary nozzle; 5. Second-stage combustion chamber; 6. Third-stage combustion chamber; 7. Combustion chamber flange; 8. Connecting bolts; 9. Atomizing device; 90. Delivery pipeline; 91. Base; 92. Atomizing tower; 920. Atomizing space; 9201. Atomizing base plate; 9202. Atomizing top plate; 9203. Atomizing cylinder; 9204. Connecting seat; 9205. Upper step; 9206. Lower step; 9207. Connecting rod; 9208. Diverter plate; 9209. Diverter hole; 93. Support cylinder; 94. Perforated plate; 95. Fixed pressure plate; 951. First weight reduction hole; 952. Second weight reduction hole; 96. Air inlet pipe; 97. Powder outlet pipe; 98. Pressure indicator; 99. Air pressure regulating valve. Detailed Implementation

[0018] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0020] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 10 As shown, the solid powder combustion power system includes a combustion power unit and an atomizing device 9. The combustion power unit is horizontally fixed by a bracket and includes a powder inlet flange 1, a first-stage combustion chamber 2, an igniter assembly 3, a second-stage combustion chamber 5, a third-stage combustion chamber 6, and a tail nozzle 4, which are coaxially connected in the direction from powder inlet to powder outlet (from left to right). The powder inlet flange 1 has a powder inlet 11, and the powder outlet end of the atomizing device 9 is connected to the powder inlet 11 through a conveying pipeline 90. In this embodiment, a temperature sensor is provided on the powder inlet flange 1. An outer pipe 21 and an inner pipe 22 are concentrically distributed along the axial direction on a combustion chamber 2. The outer pipe 21 and the inner pipe 22 enclose and form an annular and sealed cooling water supply chamber 201. The inner cavity of the inner pipe 22 forms a through combustion chamber 202, and the combustion chamber 202 is connected to the powder inlet 11. A water inlet channel 203 connected to the cooling water supply chamber 201 is provided on the combustion chamber 2. A water spray channel 204 connected to the cooling water supply chamber 201 and the combustion chamber 202 is also provided on the combustion chamber 2. A switch valve 205 for controlling the water flow is provided on the water spray channel 204. The igniter assembly 3 is connected to the combustion chamber 202 and is used to ignite the solid powder sent into the combustion chamber 202. A nozzle 41 connected to the combustion chamber 202 is provided axially through one end of the tail nozzle 4 away from the igniter assembly 3. This system transports solid powder to the combustion power unit via a chemical processing device, constructing an integrated water-cooled + water-sprayed combustion-assisted solid powder combustion power unit main structure. The cooling water supply chamber 201 and the combustion chamber 202 are coaxially integrated, abandoning the traditional separate structure of external cooling pipes and realizing the integration of cooling channels and combustion chamber structural components. At the same time, water is supplied to the combustion chamber 202 through the water spray channel 204. The cooling water not only absorbs heat from the wall of the combustion chamber 202 for efficient cooling, but also participates in the solid powder combustion reaction, taking into account both device cooling and heat dissipation and combustion efficiency improvement. It solves the problems of large size, poor sealing, cooling dead corners, and wall erosion of traditional devices, and is suitable for high-temperature and high-energy solid powder combustion conditions.

[0023] like Figures 1 to 2As shown, the second-stage combustion chamber 5 has the same structure as the first-stage combustion chamber 2, and is axially symmetrically arranged on both sides of the igniter assembly 3. This achieves a staged design of two-stage water supply + two-stage combustion. On the one hand, it increases the reaction space between the solid powder and atomized water, allowing for more complete powder combustion and significantly improving combustion efficiency. On the other hand, the two-stage water-cooling structure further expands the cooling coverage area, providing dual cooling to both sides of the igniter assembly 3, preventing ablation and thermal deformation of the ignition area due to high temperatures, reducing the risk of localized hot spots, and minimizing thermal stress. The third-stage combustion chamber 6 has the same structure as the second-stage combustion chamber 5, and its head is fixedly connected to the tail end of the second-stage combustion chamber 5. The tail end of the third-stage combustion chamber 6 is fixedly connected to the tail nozzle 4 via a combustion chamber flange 7. By forming a three-stage water supply + three-stage combustion stage design, it perfectly matches the core design concept of the disclosed technology; the three independent water cooling and combustion structures achieve precise zoning matching of cooling intensity, eliminating cooling dead zones and completely solving the problems of local overheating and wall erosion; at the same time, it greatly increases the combustion reaction space of powder fuel, allowing solid powder and atomized water to fully mix and react, maximizing combustion efficiency; and the modular design of the three-stage combustion chamber 6 makes the device more integrated and easier to assemble and maintain.

[0024] like Figures 2 to 4 As shown, a combustion chamber 2 includes a water spray flange 23, a water inlet flange 24, and a connecting flange 25, which are coaxially connected in sequence from the powder inlet to the powder outlet. The water spray flange 23 is detachably fixedly connected to the powder inlet flange 1, and the connecting flange 25 is detachably fixedly connected to the igniter assembly 3. The outer pipe 21 and the inner pipe 22 are axially concentrically arranged between the water inlet flange 24 and the connecting flange 25. The water inlet channel 203 is radially opened on the water inlet flange 24. The water spray channel 204 is radially opened on the water spray flange 23, and a water mist nozzle is provided at the outlet of the water spray channel 204. A water supply channel 241 is provided on the water inlet flange 24, which connects the water spray channel 204 and the cooling water supply chamber 201. The water supply channel 241 is axially distributed. The switching valve 205 is an electromagnetic water valve, which is provided on the water supply channel 241 and is used to control the opening and closing of the water mist nozzle. In this embodiment, a temperature sensor is also provided on the connecting flange 25. The separate layout of the water inlet channel 203 and the water spray channel 204 is clearly defined. With the precise control of the on and off of the water mist nozzles by the electromagnetic water valve, the precise diversion control of cooling water supply and water spray for combustion is achieved. The water mist nozzles allow the cooling water to be atomized and enter the combustion chamber 202, increasing the contact area with the solid powder and further improving the combustion efficiency. At the same time, the electronic control characteristics of the electromagnetic water valve make the water circuit adjustment more flexible and adaptable to the needs of variable operating conditions.

[0025] like Figures 2 to 4As shown, a cylindrical section 231 is coaxially protruding on the side of the water spray flange 23 near the powder inlet flange 1. A water mist nozzle 232 is radially opened on the outer wall of the cylindrical section 231, connecting the water spray channel 204 and the combustion chamber 202. The water mist nozzle is set on the water mist nozzle 232. A water storage tank 233 is circumferentially arranged on the outer peripheral wall of the cylindrical section 231. A waterproof sleeve 26 is fitted between the cylindrical section 231 and the powder inlet flange 1, and the waterproof sleeve 26 and the water storage tank 233 enclose each other to form a water storage cavity. The water storage cavity is connected to the water mist nozzle 232 and the water spray channel 204. A water-storage cavity buffer water mist spraying structure is constructed by the cylindrical section 231, the water storage tank 233, and the waterproof sleeve 26. The water storage cavity can temporarily store and stabilize the cooling water entering the water mist nozzle 232, so that the atomized cooling water is sprayed into the combustion chamber 202 evenly and stably, avoiding the disorder of powder combustion caused by water flow impact and improving combustion stability. At the same time, the waterproof sleeve 26 enhances the sealing of the connection between the water spray flange 23 and the powder inlet flange 1, preventing cooling water leakage, solving the problem of poor sealing in traditional devices, and further improving the reliability of the overall water-cooling structure.

[0026] like Figures 3 to 5 As shown, the igniter assembly 3 includes an annular igniter flange 31, an ignition coil 32, and an ignition seat 33. One axial end face of the igniter flange 31 is fixedly connected to one end face of a combustion chamber 2, and the other axial end face of the igniter flange 31 is fixedly connected to one end face of the tail nozzle 4. The two ends of the ignition coil 32 are respectively fixedly connected to the inner peripheral walls on both sides of the igniter flange 31, and the middle section 321 of the ignition coil 32 is wound around the ignition seat 33. The ignition seat 33 is axially distributed, and the ignition head 34 of the ignition seat 33 is located on the side closer to the combustion chamber 2. The ring-shaped igniter flange 31 achieves a coaxial sealed connection with the combustion chamber 202 and the tail nozzle 4. The ignition coil 32 is wound around the axially distributed ignition seat 33 and the ignition head 34 is oriented towards the combustion chamber 202, so that the ignition energy is more concentrated, and the solid powder is quickly and reliably ignited, avoiding fuel waste or the risk of deflagration caused by insufficient ignition. The coaxial integration design of the igniter assembly 3 and the main structure makes the overall structure more compact, with no external ignition components, reducing the size of the device.

[0027] In this embodiment, the ignition coil 32 is a copper tube, and the ignition flange 31 is connected to an ignition cooling inlet channel 311 that communicates with one end of the copper tube. The ignition cooling inlet channel 311 is connected to the cooling water supply chamber 201. The ignition flange 31 is connected to an ignition cooling outlet channel 312 that communicates with the other end of the copper tube. The ignition cooling outlet channel 312 is connected to the cooling water supply chamber 201 through an ignition water outlet pipe 313. The ignition coil 32 is designed as a copper tube and equipped with ignition cooling inlet and outlet channels to achieve integrated water cooling heat dissipation of the igniter assembly 3. The cooling water in the cooling water supply chamber 201 is used to circulate and cool the copper tube, quickly removing the heat generated by the ignition coil 32 during operation, preventing the ignition coil 32 from burning out due to high temperature, and improving the service life and working stability of the igniter assembly 3. After flowing through the copper tube, the cooling water flows back to the cooling water supply chamber 201 to achieve the recycling of cooling water, improve water resource utilization, and at the same time make the flow channel of the overall water cooling system simpler, further enhancing the structural compactness.

[0028] like Figure 2 and Figure 6 As shown, the diameter of the nozzle 4 gradually decreases from the powder inlet to the powder outlet on its inner wall. The nozzle 41 includes a main nozzle 411 and several auxiliary nozzles 412. The main nozzle 411 is axially inserted through the center of the nozzle 4, and the auxiliary nozzles 412 are evenly distributed in a ring around the main nozzle 411, with each auxiliary nozzle 412 penetrating the nozzle 4 axially. This achieves uniform and efficient injection of the combustion gas. The main nozzle 411 ensures the main thrust of the gas injection, while the auxiliary nozzles 412 allow the gas to be ejected evenly in the circumferential direction, avoiding the problems of injection deviation and uneven thrust caused by a single nozzle, and improving the stability of the device's propulsion. At the same time, the multi-nozzle structure increases the gas injection area, reduces the gas flow velocity at the nozzle, reduces the erosion caused by the high-temperature, high-speed gas scouring at the nozzle, and extends the service life of the nozzle 4.

[0029] like Figures 1 to 2 As shown, the powder inlet 11 is axially connected and located at the center of the powder inlet flange 1 on the side away from the first-stage combustion chamber 2. A concentric conical surface 10 is provided on the side of the powder inlet flange 1 closest to the first-stage combustion chamber 2, and the diameter of the conical surface 10 gradually increases from the powder inlet to the powder outlet. This achieves diffusion-type feeding of solid powder, allowing the powder to diffuse naturally after entering the combustion chamber 202, increasing the contact area with atomized water and ignition energy, avoiding incomplete combustion caused by powder accumulation, and improving combustion efficiency. At the same time, the guiding effect of the conical surface 10 makes the powder feeding smoother, reduces the risk of feed blockage, and improves the reliability of the device operation.

[0030] like Figure 1As shown, the powder inlet flange 1 is fixedly connected to the first-stage combustion chamber 2, the first-stage combustion chamber 2 to the igniter assembly 3, the igniter assembly 3 to the second-stage combustion chamber 5, the second-stage combustion chamber 5 to the third-stage combustion chamber 6, the third-stage combustion chamber 6 and the combustion chamber flange 7, and the combustion chamber flange 7 to the tail nozzle 4 by several connecting bolts 8. The connecting bolts 8 at each connection are evenly distributed circumferentially along the corresponding connection points. This ensures the sealing performance and structural stability of each connection point. The evenly distributed bolt force ensures a tight fit between the flange connection surfaces, preventing cooling water leakage or gas leakage due to uneven force distribution, thus improving the sealing performance and safety of the device. Simultaneously, the connection method of the connecting bolts 8 makes the assembly, disassembly, and maintenance of the device more convenient, solving the problem of cumbersome assembly and maintenance of traditional split-type devices, and adapting to the needs of industrial production and field use.

[0031] In summary, the advantages of the combustion power unit are: integrating the cooling water supply chamber 201 and the combustion chamber 202 into a single integrated water-cooled structure eliminates the need for external water pipes and complex joints, resulting in advantages such as small size, light weight, good sealing, simple assembly, and convenient maintenance. By setting up an annular cooling water supply chamber 201 enclosed by an outer pipe 21 and an inner pipe 22, cooling water can flow evenly along the water jacket, fully covering the high-temperature area, preventing localized hot spots, significantly reducing the risk of thermal deformation, thermal fatigue, and cracking, ensuring uniform cooling and low thermal stress. A switching valve 205 (preferably an electromagnetic water valve) is installed on the water spray channel 204 to precisely control the timing and volume of cooling water injected into the combustion chamber 202, achieving zoned controllable and overheat-free precise cooling; simultaneously, the reaction of water with high-temperature powdered fuel (especially aluminum powder) produces combustible gases such as hydrogen, which can significantly improve fuel combustion efficiency. Employing a multi-stage combustion chamber series structure with independent water supply to each stage, it achieves precise matching of cooling intensity in different areas, extending reaction time and stroke, and enabling near-complete combustion of fuel, making it particularly suitable for high-energy metal powder fuels. The ignition coil 32 uses copper tubing and is circulated with cooling water, which effectively prevents the ignition head 34 from burning out and extends its service life; at the same time, the absorbed heat can be recovered and reused, improving energy utilization efficiency.

[0032] like Figures 7 to 10As shown, in this embodiment, the atomizing device 9 includes a base 91, an atomizing tower 92, an air intake module, an air intake pipe 96, and a powder outlet pipe 97. The atomizing tower 92 is vertically mounted on the base 91, and a vertically extending atomizing space 920 is sealed inside the atomizing tower 92. The atomizing space 920 is used to store solid powder fuel (aluminum powder in this embodiment). The air intake module is fixedly installed at the bottom inside the atomizing space 920, and the air intake module includes a support cylinder 93, at least one perforated plate 94, and a fixing pressure plate 95. The support cylinder 93 is vertically mounted at the bottom of the atomizing space 920, and the perforated plate 94 is fixedly mounted on top of the support cylinder 93. The atomizing tower 92 has a fixed pressure plate 95 fixedly covering the top of the perforated plate 94. One end of the air inlet pipe 96 is connected to the bottom of the atomizing tower 92 and is used to allow gas to pass through the support cylinder 93, the perforated plate 94 and the fixed pressure plate 95 in sequence into the atomizing space 920. The other end of the air inlet pipe 96 is connected to the gas supply mechanism (such as a nitrogen or argon gas pump). The top of the atomizing tower 92 is connected to the conveying pipeline 90. The powder outlet pipe 97 is vertically arranged in the atomizing space 920, and the upper end of the powder outlet pipe 97 is connected to the conveying pipeline 90 at the top of the atomizing tower 92. The lower end of the powder outlet pipe 97 is spaced apart from the fixed pressure plate 96 and is connected to the atomizing space 920. Through the cooperation of the air intake module and the powder outlet pipe 97, the gas enters from the bottom and is evenly dispersed by the perforated plate 94, forming a stable fluidized bed effect in the atomization space 920. This fully disperses and suspends the agglomerated solid powder fuel (such as aluminum powder) and forms a uniform atomized flow, which is then continuously output through the powder outlet pipe 97. This achieves a stable, controllable and continuous supply of solid powder fuel, avoiding problems such as powder blockage, material shortage and concentration fluctuation, and laying the foundation for subsequent efficient combustion.

[0033] like Figures 8 to 10As shown, the atomizing tower 92 includes an atomizing base plate 9201, an atomizing top plate 9202, and an atomizing cylinder 9203. The atomizing cylinder 9203 is vertically connected between the atomizing base plate 9201 and the atomizing top plate 9202, and the atomizing base plate 9201, the atomizing top plate 9202, and the atomizing cylinder 9203 together form a sealed atomizing space 920. In this embodiment, the atomizing cylinder 9203 is made of transparent material, making it easy to observe the atomization effect inside. In this embodiment, both the atomizing base plate 9201 and the atomizing top plate 9202 have a disc structure. A cylindrical connecting seat 9204 protrudes downwards from the bottom surface of the atomizing top plate 9202, and the connecting seat 9204 is coaxially arranged with the atomizing top plate 9202. The upper inner circumferential wall of the atomizing cylinder 9203 is provided with an upper step 9205 along the circumferential direction. The upper part of the atomizing cylinder 9203 is sleeved on the outside of the connecting seat 9204. The upper end face of the atomizing cylinder 9203 abuts against the bottom surface of the atomizing top plate 9202. The inner circumferential wall of the atomizing cylinder 9203 abuts tightly against the outer circumferential wall of the connecting seat 9204, and the lower end face of the connecting seat 9204 abuts against the step surface of the upper step 9205. The lower inner circumferential wall of the atomizing cylinder 9203 is provided with a lower step 9206 along the circumferential direction. The lower end of the atomizing cylinder 9203 is sleeved on the outside of the air intake module. The inner circumferential wall of the atomizing cylinder 9203 abuts tightly against the outer circumferential wall of the air intake module, and the top surface of the fixing plate 95 abuts against the step surface of the lower step 9206. The stepped mating structure between the atomizing cylinder 9203, the connecting seat 9204, and the air intake module enables precise positioning and reliable sealing of the internal components of the atomizing tower 92, ensuring the structural stability of the atomizing space 920 under extreme conditions such as high pressure and high temperature. At the same time, this structure facilitates disassembly and maintenance, improving the assembly accuracy and reliability of the device.

[0034] like Figures 8 to 10 As shown, four vertically extending connecting rods 9207 are evenly distributed along the circumference of the outer periphery of the atomizing cylinder 9203. The upper end of each connecting rod 9207 is fixedly connected to the atomizing bottom plate 9201, and the lower end of each connecting rod 9207 is fixedly connected to the atomizing top plate 9202. The outer periphery of each connecting rod 9207 abuts against the outer periphery of the atomizing cylinder 9203. The support cylinder 93, the perforated plate 94, and the fixing plate 95 are all circular structures with the same outer diameter and are coaxially arranged. The outer periphery of the support cylinder 93, the perforated plate 94, and the fixing plate 95 are all tightly abutted against the inner periphery of the atomizing cylinder 9203 to achieve fixation. The connecting rod 9207 not only enhances the overall structural strength of the atomizing tower 92, but also acts as a radial limit for the atomizing cylinder 9203, preventing it from deforming or shifting under the impact of high-pressure airflow. At the same time, the support cylinder 93, the perforated plate 94, and the fixing plate 95 are radially fixed by their outer diameters abutting against the inner circumferential wall of the atomizing cylinder 9203, simplifying the installation structure of the internal components, ensuring the coaxiality and stability of the airflow channel, and making the gas distribution more uniform.

[0035] In this embodiment, as Figure 8 and Figure 9 As shown, a flow divider 9208 is disposed on the top surface of the atomizing base plate 9201 and within the inner cavity of the support cylinder 93. The flow divider 9208 is coaxially disposed with the support cylinder 93, and a ring of evenly distributed flow divider holes 9209 is disposed around the circumference of the flow divider 9208. Each flow divider hole 9209 is connected to the air inlet pipe 96. The flow divider 9208 performs initial uniform distribution of the gas entering the support cylinder 93, so that the airflow is evenly distributed in the circumferential direction before entering the porous plate 94. This avoids local airflow concentration or flow deviation, further improving the uniformity of gas distribution. This ensures that the powdered fuel is uniformly fluidized and dispersed within the atomization space 920, thereby improving the stability and consistency of the atomization effect.

[0036] In this embodiment, two porous plates 94 are used, stacked one on top of the other. Each porous plate 94 has a number of micropores evenly distributed on it, with a mesh size of 500 and a pore diameter of 30μm for each micropore. By using two high-mesh, micro-pore-diameter porous plates 94 stacked together, a multi-layer throttling and flow-uniform structure is formed, which can effectively shear the high-pressure gas into an ultra-fine, uniform airflow stream, significantly enhancing the ability to break up and disperse agglomerated powders. This allows the solid powder fuel to be atomized into an ultra-fine dispersed state, greatly increasing the specific surface area, which is beneficial for thorough mixing and rapid combustion with the oxidant during subsequent combustion.

[0037] like Figure 8 and 9 As shown, a first weight-reducing hole 951 is provided at the center of the fixed pressure plate 95, and second weight-reducing holes 952 are evenly distributed circumferentially along the outer periphery of the first weight-reducing hole 951 on the fixed pressure plate 95. The design of the weight-reducing holes effectively reduces the weight of the overall device while ensuring the structural strength of the fixed pressure plate, which is beneficial to improving the power density of the system. At the same time, the distribution structure of the weight-reducing holes helps to further homogenize the airflow after passing through the fixed pressure plate, reducing local resistance and allowing the airflow to enter the atomization space 920 more smoothly.

[0038] like Figure 8 As shown, the distance between the lower end face of the powder outlet pipe 97 and the top surface of the fixed pressure plate 95 is 25-45mm. This distance range has been optimized to ensure that a sufficient fluidization area is formed within the atomization space 920, allowing the powder to be fully suspended and dispersed, while also ensuring that the atomized powder is effectively drawn into the powder outlet pipe 97 and continuously output. This avoids the situation where the distance is too small, causing poor powder intake and blockage, or the distance is too large, causing powder to settle and not be able to be drawn up, thereby achieving stable control of the atomization output.

[0039] like Figure 7As shown, a pressure indicator 98 is connected to the top of the atomizing tower 92 via a connecting pipe. The pressure indicator 98 allows for real-time monitoring of the pressure within the atomizing space 920, enabling operators to promptly grasp the operating status of the device and determine if there are any abnormalities such as blockages or leaks, thus improving the safety and controllability of the device's operation. A pressure regulating valve 99 is also connected to the top of the atomizing tower 92 via a connecting pipe. This valve allows for flexible adjustment of the air pressure within the atomizing space 920, enabling dynamic regulation of the powder spraying speed, concentration, and flow rate to meet the atomization effect requirements under different operating conditions. Combined with inert gas protection, it effectively controls the internal pressure environment, reducing the risk of dust explosions and spontaneous combustion, and enhancing the safety performance of the device.

[0040] In summary, the advantages of the atomizing device 9 are as follows: Through the cooperation of the air inlet module and the powder outlet pipe 97, the gas enters the atomization space 920 after being uniformly dispersed from the bottom through the porous plate 94, forming a stable fluidized bed effect. This fully disperses and suspends the agglomerated solid powder fuel, forming a uniform atomized flow, which is continuously output through the powder outlet pipe 97. This effectively solves the problems of easy powder blockage, material interruption, and concentration fluctuation, and achieves a stable and controllable fuel supply. The use of two porous plates 94 with a mesh size of 200 to 1000 mesh and a pore size of 10 μm to 50 μm stacked together forms a multi-layer throttling and uniform flow structure. This shears the high-pressure gas into an ultra-fine uniform airflow stream, significantly enhancing the ability to break up and disperse agglomerated powder, atomizing the powder into an ultra-fine dispersed state, greatly increasing the specific surface area, which is beneficial for thorough mixing with the oxidant, achieving rapid and complete combustion, and improving the burnout rate and energy utilization rate. The atomizing tower 92 adopts a stepped mating structure and a radial limiting design for the connecting rod 9207 to achieve precise positioning and reliable sealing of internal components, ensuring the structural stability of the device under extreme conditions such as high pressure and high temperature, and meeting the stringent requirements of special environments such as high-energy propulsion and supersonic combustion.

[0041] During operation, aluminum powder is loaded into the atomization space 920, and a high-pressure inert gas (such as nitrogen or argon) is introduced through the air inlet pipe 96. The gas first enters the distribution plate 9208, is evenly distributed through the distribution holes 9209, and then enters the support cylinder 93. Subsequently, it passes through the weight-reducing holes on two high-mesh perforated plates 94 and the fixed pressure plate 95, and is sheared into an ultra-fine, uniform airflow stream that enters the bottom of the atomization space 920. The airflow forms a stable fluidized bed effect within the atomization space 920, fully dispersing and suspending the agglomerated aluminum powder to form a uniform atomized flow. The atomized aluminum powder is drawn in through the powder outlet pipe 97 and continuously output to the combustion power unit through the delivery pipeline 90. During this process, the internal pressure is monitored by the pressure indicator 98, and the gas flow rate and pressure are adjusted by the gas pressure regulating valve 99, thereby achieving precise control of the aluminum powder injection speed, concentration, and flow rate.

[0042] Aluminum powder is delivered to the powder inlet flange 1 in the combustion power unit through the conveying pipeline 90 connected to the powder inlet 11, and then diffused through the conical surface 10 before entering the combustion chamber 202 of the first combustion chamber 2; cooling water enters the cooling water supply chamber 201 through the water inlet channel 203 of the water inlet flange 24, flows along the annular cavity between the outer pipe 21 and the inner pipe 22, absorbs the heat from the wall of the combustion chamber 202, and achieves water cooling heat dissipation for the first combustion chamber 2.

[0043] When water spraying is required for combustion, the electromagnetic water valve is opened, and the cooling water in the cooling water supply chamber 201 enters the water spraying channel 204 through the water supply channel 241. After being temporarily stored and stabilized in the water storage chamber, it is atomized by the water mist nozzle and sprayed into the combustion chamber 202 through the water mist nozzle 232, where it is fully mixed with the solid powder fuel. The ignition coil 32 of the igniter assembly 3 is energized to generate ignition energy, and the ignition head 34 releases a spark to ignite the mixture of powder and atomized water in the combustion chamber 202, thus achieving initial combustion.

[0044] After the initial combustion, the gas and unburned powder enter the second-stage combustion chamber 5. The second-stage combustion chamber 5 uses the same water cooling and water spray structure as the first-stage combustion chamber 2 to achieve secondary cooling and secondary combustion assistance, allowing the fuel to burn more completely. Then, the gas and powder enter the third-stage combustion chamber 6 to complete the third combustion, which greatly improves the completeness of fuel combustion. Finally, the high-temperature gas after complete combustion is evenly sprayed out through the main nozzle 411 and auxiliary nozzle 412 of the tailpipe 4 to generate stable thrust.

[0045] Throughout the entire operation, the copper tube ignition coil 32 of the igniter assembly 3 achieves cooling water circulation through the ignition cooling inlet channel 311 and the ignition cooling outlet channel 312, quickly removing ignition heat and preventing the ignition seat 33 from burning out. The integrated water-cooling structure of the first combustion chamber 2, the second combustion chamber 5, and the third combustion chamber 6 achieves full-coverage cooling of the high-temperature area of ​​the device, with no cooling dead corners, effectively preventing wall erosion and thermal deformation. The staged combustion structure allows the fuel and atomized water to react fully, greatly improving combustion efficiency. At the same time, the various components of the device are coaxially integrated and bolted together, resulting in a compact structure, good sealing, and convenient assembly and maintenance.

[0046] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0047] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A solid powder combustion power system, characterized in that, The system includes a combustion power unit and an atomizing device. The combustion power unit comprises a powder inlet flange, a first-stage combustion chamber, an igniter assembly, and a tail nozzle, all coaxially connected in the direction of powder inlet to powder outlet. The powder inlet flange has a powder inlet port. The powder outlet end of the atomizing device is connected to the powder inlet port via a delivery pipeline. The first-stage combustion chamber comprises a water spray flange, a water inlet flange, and a connecting flange, all coaxially connected in the direction of powder inlet to powder outlet. The water spray flange is fixedly connected to the powder inlet flange, and the connecting flange is fixedly connected to the igniter assembly. An outer pipe and an inner pipe are coaxially arranged between the water inlet flange and the connecting flange, forming an annular and sealed cooling water supply chamber. The inner cavity of the inner tube forms a through combustion chamber, which is connected to the powder inlet. The water inlet flange is provided with a water inlet channel communicating with the cooling water supply chamber. The water spray flange is provided with a water spray channel communicating with the cooling water supply chamber and the combustion chamber. The outlet of the water spray channel is provided with a water mist nozzle. The water inlet flange is provided with a water supply channel communicating with the water spray channel and the cooling water supply chamber. The water supply channel is provided with a switch valve for controlling the opening and closing of the water mist nozzle. The igniter assembly is connected to the combustion chamber and is used to ignite the solid powder sent into the combustion chamber. The tail nozzle has a flame nozzle communicating with the combustion chamber through an axial path at one end away from the igniter assembly.

2. The solid powder combustion power system according to claim 1, characterized in that, The water spray flange has a cylindrical section coaxially protruding on the side near the powder inlet flange. A water mist nozzle is radially opened on the outer wall of the cylindrical section, connecting the water spray channel and the combustion chamber. The water mist nozzle is set on the water mist nozzle. A water storage tank is circumferentially arranged on the outer peripheral wall of the cylindrical section. A waterproof sleeve is fitted between the cylindrical section and the powder inlet flange, and the waterproof sleeve and the water storage tank are enclosed to form a water storage cavity. The water storage cavity is connected to both the water mist nozzle and the water spray channel.

3. The solid powder combustion power system according to claim 2, characterized in that, A second combustion chamber is provided between the igniter assembly and the tail nozzle. The structure of the second combustion chamber is the same as that of the first combustion chamber, and they are axially symmetrically arranged on both sides of the igniter assembly.

4. The solid powder combustion power system according to claim 3, characterized in that, It also includes a three-stage combustion chamber, which has the same structure as the two-stage combustion chamber. The front end of the three-stage combustion chamber is fixedly connected to the rear end of the two-stage combustion chamber, and the rear end of the three-stage combustion chamber is fixedly connected to the tail nozzle through a combustion chamber flange.

5. The solid powder combustion power system according to claim 1, characterized in that, The igniter assembly includes an annular igniter flange, an ignition coil, and an ignition base. One axial end face of the igniter flange is fixedly connected to one end face of a combustion chamber, and the other axial end face of the igniter flange is fixedly connected to one end face of the tail nozzle. The two ends of the ignition coil are respectively fixedly connected to the inner peripheral walls on both sides of the igniter flange, and the middle section of the ignition coil is wound around the ignition base. The ignition base is axially distributed, and the ignition head of the ignition base is located on the side closer to the combustion chamber.

6. The solid powder combustion power system according to claim 5, characterized in that, The ignition coil is a copper tube. An ignition cooling inlet channel is connected to one end of the copper tube on the igniter flange, and the ignition cooling inlet channel is connected to the cooling water supply chamber. An ignition cooling outlet channel is connected to the other end of the copper tube on the igniter flange, and the ignition cooling outlet channel is connected to the cooling water supply chamber through an ignition water outlet pipe.

7. The solid powder combustion power system according to claim 1, characterized in that, The atomizing device includes a base, an atomizing tower, an air intake module, an air intake pipe, and a powder outlet pipe. The atomizing tower is vertically mounted on the base, and a vertically extending atomizing space is sealed inside the atomizing tower for storing solid powder fuel. The air intake module is fixedly installed at the bottom of the atomizing space, and includes a support cylinder, at least one perforated plate, and a fixing plate. The support cylinder is vertically mounted at the bottom of the atomizing space, the perforated plate is fixedly mounted on the top of the support cylinder, and the fixing plate is fixedly mounted on the top of the perforated plate. One end of the air intake pipe is connected to the bottom of the atomizing tower and is used to allow gas to pass sequentially through the support cylinder, the perforated plate, and the fixing plate into the atomizing space. The other end of the air intake pipe is connected to a gas supply mechanism, and the top of the atomizing tower is connected to the conveying pipeline. The powder outlet pipe is vertically mounted inside the atomizing space, and the upper end of the powder outlet pipe is connected to the conveying pipeline at the top of the atomizing tower. The lower end of the powder outlet pipe is spaced apart from the fixing plate and communicates with the atomizing space.

8. The solid powder combustion power system according to claim 7, characterized in that, The atomizing tower includes an atomizing base plate, an atomizing top plate, and an atomizing cylinder. The atomizing cylinder is vertically connected between the atomizing base plate and the atomizing top plate, and the atomizing base plate, the atomizing top plate, and the atomizing cylinder together form a sealed atomizing space. A cylindrical connecting seat protrudes downward from the bottom surface of the atomizing top plate. An upper step is provided along the circumferential direction on the upper inner circumferential wall of the atomizing cylinder. The upper part of the atomizing cylinder is fitted onto the outside of the connecting seat. The upper end face of the atomizing cylinder abuts against the bottom surface of the atomizing top plate. The inner circumferential wall of the atomizing cylinder abuts tightly against the outer circumferential wall of the connecting seat, and the lower end face of the connecting seat abuts against the step surface of the upper step. A lower step is provided along the circumferential direction on the lower inner circumferential wall of the atomizing cylinder. The lower end of the atomizing cylinder is fitted onto the outside of the air intake module. The inner circumferential wall of the atomizing cylinder abuts tightly against the outer circumferential wall of the air intake module, and the top surface of the fixing plate abuts against the step surface of the lower step.

9. The solid powder combustion power system according to claim 8, characterized in that, The atomizing cylinder has several vertically extending connecting rods evenly distributed along its outer periphery. The upper end of each connecting rod is fixedly connected to the atomizing bottom plate, and the lower end of each connecting rod is fixedly connected to the atomizing top plate. The outer periphery of each connecting rod abuts against the outer periphery of the atomizing cylinder. The supporting cylinder, the perforated plate, and the fixing plate are all circular structures with the same outer diameter, and they are coaxially arranged. The outer periphery of the supporting cylinder, the perforated plate, and the fixing plate are all tightly abutted against the inner periphery of the atomizing cylinder for fixation.

10. The solid powder combustion power system according to claim 7, characterized in that, The perforated plate consists of two pieces, stacked one on top of the other. Each perforated plate has a number of micropores evenly distributed on it. The mesh size of the micropores is 200-1000 mesh, and the diameter of each micropore is 10-50 μm. The fixed pressure plate has a first weight-reducing hole at its center, and a second weight-reducing hole is evenly distributed circumferentially along the outer periphery of the first weight-reducing hole on the fixed pressure plate. The distance between the lower end face of the powder outlet pipe and the top surface of the fixed pressure plate is 25-45 mm.

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