Micro-mixing nozzle and combustor integrating heat pipe cooling and recuperation

Abstract

The application discloses a micro-mixing nozzle and a combustor integrated with heat pipe cooling and heat recovery, the micro-mixing nozzle comprises a heat pipe assembly I, a coaxially arranged micro-mixing sleeve, an air mixing module and a fuel pipe, the heat pipe assembly I comprises a heat conduction ring, an open hole fin, a heat pipe and a heat pipe heat dissipation fin; the combustor comprises a fuel cavity, an air cavity and a cooling cavity which are coaxially and fixedly arranged in sequence from bottom to top, and a plurality of micro-mixing nozzles which are symmetrically arranged with respect to the geometric center axis of the whole are arranged in the air cavity and the cooling cavity. The micro-mixing nozzle and the combustor integrated with heat pipe cooling and heat recovery can realize rapid cooling of the inlet area of the combustion chamber, improve the service life of the combustor, effectively utilize the heat of the inlet area of the combustion chamber to preheat air, and solve the problem that the high-temperature backflow area of the combustor causes thermal damage to the micro-mixing nozzle and shortens the service life of the combustor.

Description

Technical Field

[0001] This invention relates to a micro-mixing nozzle and burner, specifically a micro-mixing nozzle and burner integrating heat pipe cooling and regeneration, belonging to the field of gas turbine technology. Background Technology

[0002] Gas turbines, as a type of rotary power machine that can efficiently convert thermal energy into mechanical work, are widely used in fields such as aviation propulsion, industrial power generation, and ship propulsion. Their basic working principle is as follows: air is compressed by a compressor and then enters the combustion chamber, where it mixes with fuel to form high-temperature and high-pressure gas. The gas then drives the turbine to expand and do work, outputting power.

[0003] In gas turbines, the gas continues to burn after being ejected from the micro-mixing nozzle, creating a high-temperature recirculation zone at the nozzle outlet, resulting in heat loss to the nozzle. Under high-temperature and high-pressure operating conditions, prolonged operation of the micro-mixing burner significantly shortens its lifespan, especially when using hydrogen-containing fuels, where the flame temperature is higher and the flame velocity is faster, causing more severe damage to the micro-mixing nozzle. Preventing damage to the burner from the high-temperature gas near the combustion chamber outlet is a pressing issue in the gas turbine industry. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a micro-mixing nozzle and burner that integrates heat pipe cooling and regeneration. This can achieve rapid cooling of the combustion chamber inlet area and improve burner life, while also effectively utilizing the heat in the combustion chamber inlet area to preheat the air. This can solve the problem of short burner life caused by thermal damage to the micro-mixing nozzle due to the high temperature recirculation zone in current burners.

[0005] To achieve the above objectives, this integrated heat pipe cooling and regeneration micro-mixing nozzle includes a heat pipe assembly I and a coaxially arranged micro-mixing sleeve, air mixing module, and fuel pipe;

[0006] The air mixing module is a blind hole bushing structure with a blind hole coaxially arranged at the top, and the opening of the blind hole is sealed and connected to the bottom end of the micro-mixing sleeve. The fuel pipe is a blind hole shaft structure with a blind hole coaxially arranged at the bottom, and the outer diameter of the fuel pipe is smaller than the inner diameter of the micro-mixing sleeve. The fuel pipe is set inside the air mixing module, and the bottom end of the fuel pipe passes through the bottom end of the blind hole of the air mixing module. The bottom of the fuel pipe is sealed and connected to the air mixing module. The top end of the fuel pipe passes through the micro-mixing sleeve. The blind hole of the fuel pipe forms a fuel input channel. The fuel pipe has a radial fuel inlet hole that communicates with the fuel input channel at the position corresponding to the inner cavity of the air mixing module. The air mixing module has a radial air inlet hole that communicates with the inner cavity of the air mixing module. The inner cavity of the air mixing module forms an air mixing cavity. The annulus between the fuel pipe and the micro-mixing sleeve forms a fuel-air mixture output channel.

[0007] Heat pipe assembly I is positioned and installed outside the micro-mixing sleeve. Heat pipe assembly I includes a heat-conducting ring I, perforated fins I, a heat pipe I, and heat pipe cooling fins I. The heat-conducting ring I is coaxially fixedly sleeved on the top of the micro-mixing sleeve. The perforated fins I extend radially along the micro-mixing sleeve and have multiple through holes. The multiple perforated fins I are fixedly installed on the top of the micro-mixing sleeve and are symmetrically arranged with respect to the center of the micro-mixing sleeve. The heat pipe I, which has a sealed cavity, extends axially along the micro-mixing sleeve and is attached to the outer surface of the micro-mixing sleeve. The top end of the heat pipe I is fixedly connected to the heat-conducting ring I, and the bottom end of the heat pipe I is close to the top of the air mixing module. Multiple heat pipes I are symmetrically arranged relative to the center of the micro-mixing jacket, and multiple heat pipes I are staggered with multiple perforated fins I. The sealed cavity of heat pipe I is filled with a phase change heat transfer working medium. The sealed cavity of heat pipe I is divided into an evaporation section, an adiabatic section and a condensation section from top to bottom. The sealed cavity of heat pipe I is equipped with a heat insulation tube and a liquid absorber. The heat insulation tube is coaxial with heat pipe I and is positioned in the adiabatic section. The liquid absorber, positioned in the adiabatic section, is densely arranged in the annulus between the outer surface of the heat insulation tube and the inner surface of heat pipe I. The inner cavity of the heat insulation tube forms a working fluid vapor channel, and the liquid absorber forms a liquid absorption channel. The heat pipe heat dissipation fins I extend along the radial direction of heat pipe I, and multiple heat pipe heat dissipation fins I are fixedly arranged on the bottom surface of heat pipe I.

[0008] As a further improvement to the micro-mixing nozzle of the present invention, a heat pipe mounting groove is provided on the outer surface of the micro-mixing sleeve along the axial direction, and the heat pipe mounting groove matches the size of the heat pipe, with the heat pipe abutting and connected in the heat pipe mounting groove of the micro-mixing sleeve.

[0009] As a further improvement to the micro-mixing nozzle of the present invention, the radial air inlet of the air mixing module is positioned to correspond to the radial fuel inlet of the fuel pipe.

[0010] As a further improvement to the micro-mixing nozzle of the present invention, the orientation of the heat pipe heat dissipation fin I surface is set along the axial direction of heat pipe I.

[0011] As a further improvement to the micro-mixing nozzle of the present invention, the inner diameter of the air mixing module is larger than the inner diameter of the micro-mixing sleeve.

[0012] A micro-mixing burner based on integrated heat pipe cooling and regeneration nozzles comprises a fuel chamber, an air chamber, and a cooling chamber, coaxially spaced and fixedly arranged from bottom to top. The fuel chamber and air chamber are sealed apart by an air chamber bottom plate, and the air chamber and cooling chamber are separated by an air chamber top plate. The cooling chamber has a sealed cooling chamber top plate. The fuel chamber has a fuel supply channel, and the cooling chamber has an air supply channel. Multiple integrated heat pipe cooling and regeneration micro-mixing nozzles, symmetrically arranged with respect to the overall geometric axis, are installed in the air chamber and cooling chamber. Inside the air cavity, an air mixing module is installed, with its bottom end fixedly mounted on the bottom plate of the air cavity. A micro-mixing sleeve and a heat pipe penetrate the top plate of the air cavity, and a gap forming airflow channel I is provided between the heat pipe and the top plate of the air cavity. The top end of the micro-mixing sleeve penetrates the top plate of the cooling cavity, and the micro-mixing sleeve and the top plate of the cooling cavity are sealed together. The top surface of the heat-conducting ring is fitted and connected to the bottom plane of the top plate of the cooling cavity, and the air supply channel is set at the height position corresponding to the opening fins. The heat pipe heat dissipation fins are located inside the air cavity, and the heat pipe heat dissipation fins are set at the position corresponding to airflow channel I.

[0013] As a further improvement to the micro-mixed burner of the present invention, the total cross-sectional area of ​​the air supply channel is greater than the total cross-sectional area of ​​the air circulation channel I between the heat pipe and the top plate of the air cavity.

[0014] As a further improvement to the micro-hybrid burner of the present invention, a vertically arranged heat pipe assembly II is additionally provided in the cooling chamber and the air chamber. The heat pipe assembly II includes at least a heat pipe II and heat pipe heat dissipation fins II. The structure of the heat pipe II is the same as that of the heat pipe I. The top end of the heat pipe II is fixedly connected to the bottom plane of the cooling chamber top plate. The heat pipe II penetrates the air chamber top plate, and a gap is provided between the heat pipe II and the air chamber top plate to form an air flow channel II. The heat pipe heat dissipation fins II are located in the air chamber and are arranged corresponding to the position of the air flow channel II. The heat pipe heat dissipation fins II extend along the radial direction of the heat pipe II, and multiple heat pipe heat dissipation fins II are fixedly arranged on the bottom surface of the heat pipe II.

[0015] As a further improvement to the micro-hybrid burner of the present invention, multiple fuel supply channels are evenly distributed along the circumferential direction of the fuel chamber; multiple air supply channels are evenly distributed along the circumferential direction of the cooling chamber.

[0016] As a further improvement to the micro-mixed burner of the present invention, the air circulation channel I between the heat pipe and the top plate of the air cavity is an arc-shaped hole structure that cooperates with the heat pipe.

[0017] Compared with existing technologies, this integrated heat pipe cooling and regenerative micro-mixing nozzle and burner can achieve rapid cooling of the combustion chamber inlet area and improve burner life, while also effectively utilizing the heat in the combustion chamber inlet area to preheat the air. Specifically, it has the following beneficial effects:

[0018] 1. Due to the use of heat pipe phase change heat transfer combined with heat insulation tube and liquid wick structure, the phase change heat transfer working medium can achieve efficient circulation heat transfer inside the heat pipe. Compared with the traditional convection heat dissipation method, phase change heat transfer has a larger heat transfer capacity and higher efficiency, which can significantly improve the heat dissipation capacity of the nozzle.

[0019] 2. Since the micro-mixing sleeve is evenly distributed with perforated fins along the circumferential direction and the air supply channel is set at the height position of the perforated fins, it can not only enhance the heat dissipation of the micro-mixing sleeve, but also rectify the air entering the cooling chamber, so that the air is evenly distributed in the cooling chamber, thereby further improving the overall cooling effect and operational stability.

[0020] 3. After the air entering the cooling chamber purges and cools the micro-mixing sleeve and heat pipe, it enters the air chamber through the air flow channel I between the heat pipe and the top plate of the air chamber, and blows the heat pipe heat dissipation fins at the bottom of the heat pipe at high speed. This can further cool down the micro-mixing nozzle and further preheat the air entering the air chamber, thereby improving energy utilization efficiency. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the micro-mixing nozzle that integrates heat pipe cooling and heat recovery according to the present invention;

[0022] Figure 2 This is a schematic diagram of the micro-mixing nozzle that integrates heat pipe cooling and heat recovery according to the present invention;

[0023] Figure 3 This is a three-dimensional structural schematic diagram of the perforated rib and micro-mixing sleeve of the present invention;

[0024] Figure 4 This is a three-dimensional structural schematic diagram of the heat-conducting ring, heat pipe, and heat pipe heat dissipation fins of the present invention;

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the micro-hybrid burner integrating heat pipe cooling and regeneration according to the present invention;

[0026] Figure 6 yes Figure 5 A magnified view of a portion of the document;

[0027] Figure 7 This is a schematic diagram illustrating the working principle of the heat pipe of this invention;

[0028] Figure 8 This is a three-dimensional partial structural diagram of the heat pipe assembly II additionally provided in the micro-hybrid burner of the present invention.

[0029] In the diagram: 1-Heat-conducting ring, 2-Perforated fin, 3-Heat pipe, 4-Heat pipe heat dissipation fins, 5-Air mixing module, 6-Fuel pipe, 7-Micro-mixing sleeve, 8-Cooling chamber top plate, 9-Cooling chamber, 10-Air supply channel, 11-Air chamber, 12-Air chamber top plate, 13-Air chamber bottom plate, 14-Fuel chamber, 15-Fuel supply channel, 16-Liquid suction core, 17-Heat insulation pipe. Detailed Implementation

[0030] The invention will be further described below with reference to the accompanying drawings (the following description is based on the direction of the air-fuel mixture being ejected from above).

[0031] like Figures 1 to 4 As shown, the integrated heat pipe cooling and regeneration micro-mixing nozzle (hereinafter referred to as the micro-mixing nozzle) includes a heat pipe assembly I and a coaxially arranged micro-mixing sleeve 7, an air mixing module 5, and a fuel pipe 6.

[0032] The air mixing module 5 is a blind hole bushing structure with a blind hole coaxially arranged at its top end. The opening of the blind hole is connected to the bottom end of the micro-mixing sleeve 7 by a threaded fit. The fuel pipe 6 is a blind hole shaft structure with a blind hole coaxially arranged at its bottom end. The outer diameter of the fuel pipe 6 is smaller than the inner diameter of the micro-mixing sleeve 7. The fuel pipe 6 is set inside the air mixing module 5. The bottom end of the fuel pipe 6 passes through the bottom end of the blind hole of the air mixing module 5. The bottom of the fuel pipe 6 is connected to the air mixing module 5 by a threaded fit. The top end of the fuel pipe 6 passes into the micro-mixing sleeve 7. The blind hole of the fuel pipe 6 forms a fuel input channel. The fuel pipe 6 has a radial fuel inlet hole that communicates with the fuel input channel at a position corresponding to the inner cavity of the air mixing module 5. The air mixing module 5 has a radial air inlet hole that communicates with the inner cavity of the air mixing module 5. The inner cavity of the air mixing module 5 forms an air mixing chamber. The annulus between the fuel pipe 6 and the micro-mixing sleeve 7 forms a fuel-air mixture output channel.

[0033] Heat pipe assembly I is positioned and installed outside the micro-mixing sleeve 7. Heat pipe assembly I includes a heat-conducting ring I1, perforated fins I2, a heat pipe I3, and heat pipe heat dissipation fins I4. The heat-conducting ring I1 is coaxially fixedly sleeved on the top of the micro-mixing sleeve 7. The perforated fins I2 extend radially along the micro-mixing sleeve 7 and have multiple through holes. The multiple perforated fins I2 are fixedly installed on the top of the micro-mixing sleeve 7. The heat pipes are arranged symmetrically with respect to the center of the micro-mixing sleeve 7; heat pipes I3 with sealed cavities extend along the axial direction of the micro-mixing sleeve 7 and are thermally conductively attached to the outer surface of the micro-mixing sleeve 7. The top end of the heat pipe I3 ​​is thermally conductively and fixedly connected to the heat-conducting ring I1, and the bottom end of the heat pipe I3 ​​is close to the top end of the air mixing module 5. Multiple heat pipes I3 are arranged symmetrically with respect to the center of the micro-mixing sleeve 7, and multiple heat pipes I3 are staggered with multiple perforated fins I2, such as... Figure 7 As shown, the sealed cavity of heat pipe I3 ​​is filled with a phase change heat transfer working medium, and the sealed cavity of heat pipe I3 ​​is divided into an evaporation section, an adiabatic section, and a condensation section from top to bottom. An insulation tube 17 and a wick 16 are installed inside the sealed cavity of heat pipe I3. The insulation tube 17 is coaxially arranged with heat pipe I3 ​​and positioned within the adiabatic section. The wicks 16, positioned within the adiabatic section, are densely arranged in the annulus between the outer surface of the insulation tube 17 and the inner surface of the heat pipe I3. The inner cavity of the insulation tube 17 forms a working fluid vapor channel, and the wicks 16... A liquid absorption channel is formed. The phase change heat transfer medium can be organic phase change materials such as alcohols and esters, or inorganic phase change materials such as inorganic salts, hydrated inorganic salts, and liquid ammonia, or other phase change heat transfer mediums that can achieve heat storage and transfer through the phase change process. The liquid absorption core 16 can be a capillary structure or a porous sponge structure that can achieve the siphon effect. The heat pipe heat dissipation fins I4 extend along the radial direction of the heat pipe I3, and multiple heat pipe heat dissipation fins I4 are fixedly arranged on the bottom surface of the heat pipe I3.

[0034] like Figure 5 As shown, this integrated heat pipe cooling and regeneration micro-mixing burner (hereinafter referred to as the micro-mixing burner) includes a fuel chamber 14, an air chamber 11, and a cooling chamber 9, which are coaxially spaced and fixedly arranged from bottom to top. The fuel chamber 14 and the air chamber 11 are sealed apart by an air chamber bottom plate 13, and the air chamber 11 and the cooling chamber 9 are separated by an air chamber top plate 12. The top of the cooling chamber 9 is provided with a sealed cooling chamber top plate 8. The fuel chamber 14 is provided with a fuel supply channel 15. To achieve uniform fuel delivery into the fuel chamber 14, multiple fuel supply channels 15 can be evenly distributed along the circumferential direction of the fuel chamber 14. The cooling chamber 9 is provided with multiple air supply channels 10 evenly distributed along the circumferential direction of the cooling chamber 9. Multiple micro-mixing nozzles, symmetrically arranged with respect to the overall geometric axis of the micro-mixing burner, are installed in the air chamber 11 and the cooling chamber 9 for air mixing. Module 5 is set inside the air cavity 11, and the bottom end of the air mixing module 5 is fixedly installed on the bottom plate 13 of the air cavity. The micro-mixing sleeve 7 and the heat pipe I3 ​​penetrate the top plate 12 of the air cavity, and there is a gap between the heat pipe I3 ​​and the top plate 12 of the air cavity to form an air flow channel I. In order to achieve a better air preheating effect, the total cross-sectional area of ​​the air supply channel 10 is larger than the total cross-sectional area of ​​the air flow channel I between the heat pipe I3 ​​and the top plate 12 of the air cavity. The top end of the micro-mixing sleeve 7 penetrates the top plate 8 of the cooling cavity, and the micro-mixing sleeve 7 and the top plate 8 of the cooling cavity are sealed together. The top surface of the heat conducting ring I1 is thermally connected to the bottom plane of the top plate 8 of the cooling cavity, and the air supply channel 10 is set at the height position corresponding to the opening fin I2. The heat pipe heat dissipation fin I4 is located inside the air cavity 11, and the heat pipe heat dissipation fin I4 is set at the position corresponding to the air flow channel I.

[0035] When this integrated heat pipe cooling and regeneration micro-mixer burner is working, fuel is fed into the fuel chamber 14 through the fuel supply channel 15, and then enters the air mixing chamber of the air mixing module 5 through the fuel input channel and the fuel radial air inlet of the fuel pipe 6; air enters the cooling chamber 9 through the air supply channel 10, and then enters the air chamber 11 through the air flow channel I between the heat pipe I3 ​​and the air chamber top plate 12, and then enters the air mixing chamber of the air mixing module 5 through the air radial air inlet of the air mixing module 5; air and fuel are mixed in the air mixing chamber to form a fuel-air mixture, and the fuel-air mixture enters the micro-mixing sleeve 7 through the fuel-air mixture output channel between the fuel pipe 6 and the micro-mixing sleeve 7, and is ejected from the top of the micro-mixing sleeve 7 into the combustion chamber of the micro-mixer burner located above the cooling chamber 9, where it is ignited and combustion is achieved.

[0036] The heat generated during the combustion of the air-fuel mixture keeps the area around the micro-mixing nozzle and the top plate 8 of the cooling chamber at a high temperature. This high temperature can be conducted along the axial direction of the micro-mixing sleeve 7 and radiated along the radial direction of the micro-mixing sleeve 7. Simultaneously, the high temperature can radiate through the inner surface of the top plate 8 of the cooling chamber. On one hand, as air enters the cooling chamber 9 through the air supply channel 10, it blows through the perforated fins I2 on the micro-mixing sleeve 7, achieving cooling of the micro-mixing sleeve 7 and the top plate 8 of the cooling chamber. Furthermore, since the total cross-sectional area of ​​the air supply channel 10 is larger than the total cross-sectional area of ​​the airflow channel I between the heat pipe I3 ​​and the top plate 12 of the air chamber, and the perforated fins I2 with their perforations can expand the heat dissipation area and make the air blowing and cooling more thorough, the air entering the cooling chamber 9 can diffuse evenly and fill the cooling chamber 9, thus... The air inside the cooling chamber 9 is preheated. As the air enters the air chamber 11 through the airflow channel I between the heat pipe I3 ​​and the top plate 12, it is rapidly blown across the heat pipe cooling fins I4 at the bottom of the heat pipe I3, further preheating the air inside the air chamber 11 and cooling the bottom of the heat pipe I3. This preheating of the air entering the air mixing module 5's air mixing chamber is achieved. On the other hand, the high-temperature heat from the top plate 8 of the cooling chamber can be transferred to the heat-conducting ring I1 and the top of the heat pipe I3 ​​through heat conduction. Figure 7As shown, the phase change heat transfer medium inside heat pipe I3 ​​absorbs heat and undergoes phase change vaporization in the evaporation section at the top of heat pipe I3. Under the action of volume expansion, it carries heat and diffuses to the bottom of heat pipe I3 ​​through the working fluid vapor channel in the heat insulation pipe 17. As the air in the cooling chamber 9 enters the air chamber 11 through the air flow channel I between heat pipe I3 ​​and the top plate 12 of the air chamber, it blows the heat pipe heat dissipation fins I4 at high speed at the bottom of heat pipe I3 ​​to dissipate heat at the bottom of heat pipe I3. Therefore, when the vaporized phase change heat transfer medium reaches the condensation section at the bottom of heat pipe I3, the heat it carries can be transferred to the heat pipe heat dissipation fins I4, thereby causing the phase change vaporized phase change heat transfer medium to undergo phase change liquefaction. Under the driving force of the subsequent volume expansion of the vaporized phase change heat transfer medium and the siphon effect of the liquid wick 16, the liquefied phase change heat transfer medium flows back to the evaporation section of heat pipe I3 ​​through the liquid wicking channel of the liquid wick 16. This process is repeated to achieve the cyclic phase change of the phase change heat transfer medium inside heat pipe I3 ​​and the efficient transfer of heat.

[0037] To achieve better heat transfer between heat pipe I3 ​​and micro-mixing sleeve 7, as a further improvement to the micro-mixing nozzle of this invention, such as... Figure 3 As shown, the outer surface of the micro-mixing sleeve 7 is provided with a heat pipe mounting groove arranged in the axial direction, and the heat pipe mounting groove is matched with the size of the heat pipe I3. The heat pipe mounting groove can be set as an arc-shaped groove structure that matches the outer diameter of the heat pipe I3, and the heat pipe I3 ​​can be thermally conductively attached to the heat pipe mounting groove.

[0038] To achieve better mixing results, as a further improvement to the micro-mixing nozzle of this invention, such as... Figure 2 As shown, the radial air inlet of the air mixing module 5 is positioned to correspond to the radial fuel inlet of the fuel pipe 6. The airflow entering the air mixing chamber can counteract the fuel flow entering the air mixing chamber, thereby achieving a better mixing effect.

[0039] To achieve better heat dissipation through blowing on the heat pipe fins I4, as a further improvement to the micro-mixing nozzle of this invention, such as... Figure 4 , Figure 5 , Figure 6 As shown, the fin surface of heat pipe heat dissipation fin I4 is oriented along the axial direction of heat pipe I3, that is, the fin surface of heat pipe heat dissipation fin I4 is oriented in the same direction as the airflow entering the air cavity 11, and the airflow entering the air cavity 11 can simultaneously sweep the fin surfaces of multiple heat pipe heat dissipation fins I4.

[0040] To achieve a more uniform mixing effect, as a further improvement to the micro-mixing nozzle of the present invention, such as... Figure 2As shown, the inner diameter of the air mixing module 5 is larger than that of the micro-mixing sleeve 7, so that the air flow entering the air mixing chamber can be fully mixed with the fuel flow entering the air mixing chamber.

[0041] To achieve better heat dissipation through blowing on the heat pipe fins I4, as a further improvement to the micro-mixer burner of this invention, such as... Figure 6 As shown, the air circulation channel I between heat pipe I3 ​​and the top plate 12 of the air cavity is an arc-shaped hole structure that cooperates with heat pipe I3.

[0042] To achieve better air preheating and better heat dissipation from the top plate 8 of the cooling chamber, as a further improvement to the micro-hybrid burner of this invention, such as... Figure 8 As shown, a vertically arranged heat pipe assembly II is additionally provided in the cooling chamber 9 and the air chamber 11. The heat pipe assembly II can be located between adjacent micro-mixing nozzles. The heat pipe assembly II includes at least a heat pipe II and heat pipe heat dissipation fins II. The structure of the heat pipe II is the same as that of the heat pipe I3. The top end of the heat pipe II is thermally conductively and fixedly connected to the bottom plane of the cooling chamber top plate 8. The heat pipe II penetrates the air chamber top plate 12, and a gap is provided between the heat pipe II and the air chamber top plate 12 to form an air circulation channel II. The air circulation channel II can be an annular channel structure surrounding the heat pipe II, or... It can be an arc-shaped perforated structure that works with heat pipe II. The heat pipe heat dissipation fins II are located inside the air cavity 11 and are positioned corresponding to the air flow channel II. The heat pipe heat dissipation fins II extend radially along the heat pipe II and multiple heat pipe heat dissipation fins II are fixedly mounted on the bottom surface of the heat pipe II. The structure of the heat pipe assembly II can also be the same as that of the heat pipe assembly I, including a heat-conducting ring II and / or perforated fins II. The top end of the heat pipe II can be thermally connected to the bottom plane of the cooling cavity top plate 8 through the heat-conducting ring II. This will not be described in detail here.

[0043] This integrated heat pipe cooling and regenerative micro-mixing nozzle and burner can achieve rapid cooling of the combustion chamber inlet area and improve burner life. At the same time, it can effectively utilize the heat in the combustion chamber inlet area to preheat the air, thereby solving the problem of short burner life caused by thermal damage to the micro-mixing nozzle in the high-temperature recirculation zone of the current burner.

Claims

1. A micro-mixing nozzle integrating heat pipe cooling and regeneration, characterized in that, It includes heat pipe assembly I, as well as coaxially arranged micro-mixing sleeve (7), air mixing module (5) and fuel pipe (6); The air mixing module (5) is a blind hole bushing structure with a blind hole coaxially arranged at its top end, and the opening of the blind hole is sealed and connected to the bottom end of the micro-mixing sleeve (7). The fuel pipe (6) is a blind hole shaft structure with a blind hole coaxially arranged at its bottom end, and the outer diameter of the fuel pipe (6) is smaller than the inner diameter of the micro-mixing sleeve (7). The fuel pipe (6) is set inside the air mixing module (5), and the bottom end of the fuel pipe (6) penetrates the bottom end of the blind hole of the air mixing module (5). The bottom of the fuel pipe (6) is connected to the air mixing module (5). The fuel pipe (6) is installed in a sealed manner. The top end of the fuel pipe (6) is inserted into the micro-mixing sleeve (7). The blind hole of the fuel pipe (6) forms a fuel input channel. The fuel pipe (6) is provided with a radial fuel inlet hole that communicates with the fuel input channel at the position corresponding to the inner cavity of the air mixing module (5). The air mixing module (5) is provided with a radial air inlet hole that communicates with the inner cavity of the air mixing module (5). The inner cavity of the air mixing module (5) forms an air mixing cavity. The annulus between the fuel pipe (6) and the micro-mixing sleeve (7) forms a fuel-air mixture output channel. Heat pipe assembly I is positioned and installed outside the micro-mixing sleeve (7). Heat pipe assembly I includes a heat-conducting ring I (1), perforated fins I (2), heat pipe I (3), and heat pipe heat dissipation fins I (4). The heat-conducting ring I (1) is coaxially fixedly sleeved on the top of the micro-mixing sleeve (7). The perforated fins I (2) extend along the radial direction of the micro-mixing sleeve (7), and the perforated fins I (2) are provided with multiple perforated holes penetrating the perforated fins I (2). 2) Fixedly installed on the top of the micro-mixing sleeve (7), and multiple perforated ribs I (2) are symmetrically arranged with respect to the center of the micro-mixing sleeve (7); heat pipe I (3) with a sealed cavity extends along the axial direction of the micro-mixing sleeve (7), and heat pipe I (3) is attached to the outer surface of the micro-mixing sleeve (7). The top end of heat pipe I (3) is attached to the heat-conducting ring I (1) and fixedly connected. The bottom end of heat pipe I (3) is close to the top end of the air mixing module (5). Multiple Heat pipe I (3) is symmetrically arranged with respect to the micro-mixing sleeve (7), and multiple heat pipes I (3) are staggered with multiple perforated fins I (2). The sealed cavity of heat pipe I (3) is filled with phase change heat transfer working medium. The sealed cavity of heat pipe I (3) is divided into an evaporation section, an insulation section and a condensation section from top to bottom. The sealed cavity of heat pipe I (3) is provided with a heat insulation tube (17) and a liquid absorber (16). The heat insulation tube (17) is coaxially arranged with heat pipe I (3) and is heat-insulating. The tube (17) is positioned within the insulation section, and the liquid-absorbing core (16) positioned within the insulation section is densely arranged in the annulus between the outer surface of the insulation tube (17) and the inner surface of the heat pipe I (3). The inner cavity of the insulation tube (17) forms a working fluid vapor channel, and the liquid-absorbing core (16) forms a liquid-absorbing channel. The heat pipe heat dissipation fins I (4) extend along the radial direction of the heat pipe I (3), and multiple heat pipe heat dissipation fins I (4) are fixedly arranged on the bottom surface of the heat pipe I (3).

2. The micro-mixing nozzle for integrated heat pipe cooling and regeneration according to claim 1, characterized in that, The outer surface of the micro-mixing sleeve (7) is provided with a heat pipe mounting groove arranged in the axial direction, and the heat pipe mounting groove is matched with the size of the heat pipe I (3). The heat pipe I (3) is attached to the heat pipe mounting groove of the micro-mixing sleeve (7).

3. The micro-mixing nozzle for integrated heat pipe cooling and regeneration according to claim 1, characterized in that, The radial air inlet of the air mixing module (5) is positioned to correspond to the radial fuel inlet of the fuel pipe (6).

4. The micro-mixing nozzle for integrated heat pipe cooling and regeneration according to claim 1, characterized in that, The fins of heat pipe heat dissipation fin I (4) are oriented along the axial direction of heat pipe I (3).

5. The micro-mixing nozzle for integrated heat pipe cooling and regeneration according to claim 1, characterized in that, The inner diameter of the air mixing module (5) is larger than that of the micro-mixing sleeve (7).

6. A micro-mixing burner with integrated heat pipe cooling and regeneration based on the micro-mixing nozzle with integrated heat pipe cooling and regeneration as described in claim 1, characterized in that, The entire assembly comprises a fuel chamber (14), an air chamber (11), and a cooling chamber (9) arranged coaxially and fixedly from bottom to top. The fuel chamber (14) and the air chamber (11) are sealed apart by an air chamber bottom plate (13), and the air chamber (11) and the cooling chamber (9) are separated by an air chamber top plate (12). The top of the cooling chamber (9) is provided with a sealed cooling chamber top plate (8). The fuel chamber (14) is provided with a fuel supply channel (15), and the cooling chamber (9) is provided with an air supply channel (10). Multiple integrated heat pipe cooling and regeneration micro-mixing nozzles, symmetrically arranged with respect to the overall geometric axis, are installed in the air chamber (11) and the cooling chamber (9). An air mixing module (5) is located in the air chamber (11). The bottom end of the air mixing module (5) is fixedly installed on the bottom plate (13) of the air cavity. The micro-mixing sleeve (7) and the heat pipe I (3) penetrate the top plate (12) of the air cavity. A gap is provided between the heat pipe I (3) and the top plate (12) of the air cavity to form the air circulation channel I. The top end of the micro-mixing sleeve (7) penetrates the top plate (8) of the cooling cavity. The micro-mixing sleeve (7) and the top plate (8) of the cooling cavity are sealed together. The top surface of the heat-conducting ring I (1) is attached to the bottom plane of the top plate (8) of the cooling cavity. The air supply channel (10) is set at the height position corresponding to the opening rib I (2). The heat pipe heat dissipation fin I (4) is located inside the air cavity (11). The heat pipe heat dissipation fin I (4) is set at the position corresponding to the air circulation channel I.

7. The micro-hybrid burner with integrated heat pipe cooling and regeneration according to claim 6, characterized in that, The total cross-sectional area of ​​the air supply channel (10) is greater than the total cross-sectional area of ​​the air circulation channel I between the heat pipe I (3) and the air cavity top plate (12).

8. The micro-hybrid burner with integrated heat pipe cooling and regeneration according to claim 6, characterized in that, The cooling chamber (9) and the air chamber (11) are additionally provided with vertically arranged heat pipe assembly II. The heat pipe assembly II includes at least heat pipe II and heat pipe heat dissipation fins II. The structure of heat pipe II is the same as that of heat pipe I (3). The top end of heat pipe II is fixedly connected to the bottom plane of the cooling chamber top plate (8). Heat pipe II passes through the air chamber top plate (12), and there is a gap between heat pipe II and air chamber top plate (12) to form air circulation channel II. Heat pipe heat dissipation fins II are located in the air chamber (11), and heat pipe heat dissipation fins II are set at the position corresponding to air circulation channel II. Heat pipe heat dissipation fins II extend along the radial direction of heat pipe II, and multiple heat pipe heat dissipation fins II are fixedly set on the bottom surface of heat pipe II.

9. The micro-hybrid burner with integrated heat pipe cooling and regeneration according to claim 6, characterized in that, Multiple fuel supply channels (15) are evenly distributed along the circumferential direction of the fuel chamber (14); multiple air supply channels (10) are evenly distributed along the circumferential direction of the cooling chamber (9).

10. The micro-hybrid burner with integrated heat pipe cooling and regeneration according to claim 6, characterized in that, The air circulation channel I between heat pipe I (3) and the top plate (12) of the air cavity is an arc-shaped hole structure that cooperates with heat pipe I (3).

Images