A combustion assembly

Abstract

The application discloses a combustion assembly, comprising: a combustion chamber, which is a hollow pipe type; a bottom wall, which is arranged at one end of the combustion chamber, and is provided with an air inlet and a recirculation inlet around the air inlet; a gas distribution device, which is annular, and is arranged on the inner wall of the end of the combustion chamber away from the bottom wall, the outer wall of the gas distribution device is attached to the inner wall of the end of the combustion chamber away from the bottom wall, and the outer wall of the gas distribution device is inclined to the axis at the end facing the bottom wall; and a lead-out pipe, which is communicated with the combustion chamber at one end and communicated with the recirculation inlet at the other end, and the axial position of the lead-out pipe communicated with the combustion chamber is located at the position where the outer wall of the gas distribution device is inclined to the axis. The recirculation gas with high temperature and high pressure exchanges heat with the air entering the air inlet, so that the initial temperature of the air entering the air inlet is increased, and the final combustion temperature is also increased, thereby obtaining a higher combustion temperature.

Description

Technical Field

[0001] This application relates to the field of heating devices, and more particularly to a combustion assembly. Background Technology

[0002] Heaters or reformers typically require combustion components to evaporate or burn fuel during heating operations and transfer the generated heat to the contaminated medium. The combustion temperature and efficiency within these components are crucial for efficient fuel utilization. This is especially true in vehicles and other mobile devices where internal heating is essential during cold winters. Due to the relatively small size of these devices and the limited fuel capacity, efficient fuel utilization presents numerous challenges yet remains a pressing need. Summary of the Invention

[0003] The main objective of this application is to provide a combustion assembly that addresses the technical issues of combustion temperature and combustion efficiency.

[0004] To achieve the above objectives, this application provides a combustion assembly, comprising: a combustion chamber, which is a hollow tube; a bottom wall, which covers one end of the combustion chamber and has an air inlet, with recirculation inlets surrounding the air inlet; a gas distributor, which is annular and disposed on the inner wall of the combustion chamber at the end opposite to the bottom wall, with the outer wall of the gas distributor facing away from the bottom wall adhering to the inner wall of the combustion chamber, and the outer wall of the gas distributor inclined towards the axis at the end facing the bottom wall; and an outlet pipe, one end of which communicates with the combustion chamber, and the other end of which communicates with the recirculation inlet, with the axial position of the outlet pipe communicating with the combustion chamber located at the position where the outer wall of the gas distributor is inclined towards the axis.

[0005] Optionally, it also includes: a porous evaporator, which is annular and disposed on and in contact with the inner wall of the combustion chamber. The porous evaporator is used to deliver fuel or steam to the combustion chamber. By delivering fuel into the combustion chamber through the porous evaporator, the fuel is dispersed around the combustion chamber before entering it, which is more conducive to the mixing of fuel with air after entering the combustion chamber, resulting in more complete combustion and significantly improving combustion efficiency.

[0006] Optionally, one end of the porous evaporator contacts the bottom wall. This allows fuel to enter the combustion chamber from the bottom wall when passing through the porous evaporator, enabling the fuel and air to mix earlier and more thoroughly, thus improving combustion efficiency.

[0007] Optionally, it also includes: an injection pipe connected to an outlet pipe for injecting water or steam into the outlet pipe. When fuel oil is used for combustion, carbon deposits are inevitable. Injecting water or steam into the component allows the steam to chemically react with the carbon, thus removing the carbon deposits.

[0008] Optionally, it also includes a purge pipe, which is a hollow tube and is located on the bottom wall facing the combustion chamber and connected to the recirculation inlet. In actual use, carbon deposits often easily accumulate on the surface of porous evaporators. These deposits are difficult to remove, affecting not only combustion efficiency but also fuel output. By guiding the pressurized recirculation gas entering the combustion chamber, an airflow is created, lifting the carbon deposits from the porous evaporator surface and preparing it for further carbon removal using steam.

[0009] Optionally, the diameter of the purge pipe gradually decreases from the end facing the bottom wall towards the combustion chamber. This increases the pressure of the recirculated gas entering the combustion chamber, making the airflow more active, which not only facilitates fuel-air mixing but also helps to lift carbon deposits.

[0010] Optionally, a purge hole is provided on the side wall of the purge pipe. In actual use, carbon deposits are prone to occur on the bottom wall. These carbon deposits are difficult to remove and will affect combustion efficiency. By providing a purge hole on the side wall of the purge pipe to divert the recirculated gas and guide the diverted recirculated gas, the carbon deposits on the bottom wall are lifted, making sufficient preparation for further removal of carbon deposits using steam.

[0011] Optionally, it also includes: an air guide duct, which is a hollow tube type, located outside the outlet pipe. One end of the air guide duct near the bottom wall is closed, while the other end is open, used to guide airflow past the outside of the outlet pipe and into the combustion chamber from the air inlet. This allows the temperature inside the outlet pipe to be further utilized, creating a multi-step temperature gradient within the combustion chamber, significantly increasing the air temperature entering the combustion chamber from the air inlet, reducing heat loss while increasing the heating temperature, thereby significantly improving the overall efficiency of the assembly.

[0012] Optionally, it also includes a flame tube, which is located at the end of the combustion chamber facing away from the bottom wall. The flame tube is integrally formed with the combustion chamber or is detachably connected. When transferring the heat energy of the high-temperature air in the combustion chamber to the heater or reformer, the flame tube is required for connection and transition. Making the flame tube detachable makes maintenance and replacement more convenient.

[0013] Optionally, an air passage is provided between the flame tube and the combustion chamber. By introducing a second air passage, not only can the air in the combustion chamber and the flame tube be mixed, but the temperature can also be regulated, which is beneficial for adapting to the usage requirements of different scenarios.

[0014] The technical effects achieved by this application are as follows: In this application, the annular gas separator divides the high-temperature mixed gas in the combustion chamber into two parts: heat-exchange gas passing through the middle of the gas separator and recirculated gas passing through the inclined position on the outer wall of the gas separator. The outer wall of the gas separator is inclined towards the axis at the bottom end, forming a funnel shape. When the recirculated gas passes through this position, it is compressed and has a certain pressure. The recirculated gas with a certain pressure is led out through the outlet pipe and re-enters the combustion chamber through the recirculation inlet. At this time, the recirculated gas has a certain pressure and high temperature. When the recirculated gas with pressure comes into contact with the air entering through the air inlet, it will agitate the airflow, making the airflow in the combustion chamber more active, thereby making the mixing of fuel or steam with air more complete and improving combustion efficiency. At the same time, heat exchange occurs when the recirculated gas with pressure and high temperature comes into contact with the air entering through the air inlet, which increases the initial temperature of the air entering through the air inlet. With the same amount of heat, the final combustion temperature is also increased when the initial temperature is increased, thus achieving a higher combustion temperature. Ultimately, this improves the combustion efficiency and temperature of the combustion components, thereby significantly increasing the overall efficiency of the combustion components. Attached Figure Description

[0015] Figure 1 This is a top view of a combustion assembly disclosed in this application.

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle AA section;

[0017] Figure 3 for Figure 2 Enlarged structural diagram of section B;

[0018] Figure 4 This is a three-dimensional structural schematic diagram of a combustion assembly disclosed in this application;

[0019] Figure 5 A structural diagram showing the location of the air duct and air passage in this application;

[0020] Wherein: 1-combustion chamber, 2-bottom wall, 21-air inlet, 22-recirculation inlet, 23-purge pipe, 231-purge hole, 3-gas distribution device, 4-outlet pipe, 5-porous evaporator, 6-flame tube, 61-air passage, 7-air duct.

[0021] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] Reference Figure 1-4The first embodiment of this application provides a combustion assembly, including: a combustion chamber 1, which is a hollow tube; a bottom wall 2, which covers one end of the combustion chamber 1, and has an air inlet 21 on it, with recirculation inlets 22 arranged around the air inlet 21; a gas distributor 3, which is annular and disposed on the inner wall of the combustion chamber 1 at the end opposite to the bottom wall 2, with the outer wall of the gas distributor 3 facing away from the bottom wall 2 and adhering to the inner wall of the combustion chamber 1, and the outer wall of the gas distributor 3 inclined towards the axis at the end facing the bottom wall 2; and an outlet pipe 4, one end of which is connected to the combustion chamber 1, and the other end of which is connected to the recirculation inlet 22, with the axial position of the outlet pipe 4 connected to the combustion chamber 1 located at the position where the outer wall of the gas distributor 3 is inclined towards the axis. In this embodiment, the annular gas distributor 3 divides the high-temperature mixed gas in the combustion chamber 1 into: heat exchange gas passing through the middle of the gas distributor 3 and recirculated gas passing through the inclined position of the outer wall of the gas distributor 3. The outer wall of the gas distributor 3, facing the bottom wall 2, is inclined towards the axis to form a funnel shape. When the recirculated gas passes through this position, it is compressed and gains a certain pressure. This pressurized recirculated gas is then led out through the outlet pipe 4 and re-enters the combustion chamber 1 through the recirculation inlet. At this point, the recirculated gas possesses a certain pressure and high temperature. When this pressurized recirculated gas comes into contact with the air entering through the air inlet 21, it agitates the airflow, making the airflow within the combustion chamber 1 more active. This results in a more thorough mixing of fuel or steam with air, thereby improving combustion efficiency. Simultaneously, the pressurized and high-temperature recirculated gas exchanges heat with the air entering through the air inlet 21, increasing the initial temperature of the air entering through the air inlet 21. With the same amount of heat, the increased initial temperature leads to an increased final combustion temperature, resulting in a higher combustion temperature. Ultimately, this improves the combustion efficiency and combustion temperature of the combustion assembly, significantly enhancing the overall efficiency of the combustion assembly.

[0027] As an optional implementation method, refer to Figure 2-3A specific structure for a combustion assembly is provided, including a porous evaporator 5. The porous evaporator 5 is annular and is disposed on and attached to the inner wall of the combustion chamber 1. The porous evaporator 5 is used to transport fuel or steam to the combustion chamber 1. In this embodiment, when transporting fuel or steam to the combustion chamber 1, it is necessary to consider how to mix the fuel or steam with air more thoroughly to improve combustion efficiency, while also considering the impact of internal carbon deposits on the transport device and the cost of the transport device. To this end, fuel is transported to the combustion chamber 1 through the annular porous evaporator 5. The annular porous evaporator 5 is disposed on and attached to the inner wall of the combustion chamber 1, so that the inner wall of the porous evaporator 5 becomes the inner wall of the combustion chamber 1. Furthermore, the fuel in the porous evaporator 5 can only enter the combustion chamber 1 through the inner wall of the porous evaporator 5, which is equivalent to the fuel entering the combustion chamber 1 through the inner wall of the combustion chamber 1. Air inlet 21 is located on bottom wall 2, which covers one end of combustion chamber 1. During operation, air entering combustion chamber 1 through air inlet 21 is necessarily within the side wall of combustion chamber 1. Fuel enters combustion chamber 1 through porous evaporator 5, which is equivalent to entering combustion chamber 1 through the side wall, significantly increasing the initial contact area between fuel and air, thus achieving more thorough mixing of fuel and air. In actual use, porous evaporator 5 can be made of metal wire mesh, braided yarn, foam ceramic, etc. Fuel is supplied to the medium of porous evaporator 5 through a supply pipeline device, and is transported through the internal capillary network and distributed in the medium of porous evaporator 5 by gravity. The inner wall of the medium of porous evaporator 5 is exposed to the evaporation chamber, thereby evaporating the fuel inside the porous evaporator 5. The evaporated fuel vapor and air entering through air inlet 21 are introduced into the central region of combustion chamber 1, allowing the fuel vapor and air to mix relatively thoroughly, thus providing a combustible mixture throughout the entire volume area of ​​the evaporation chamber. Subsequently, it evaporates or burns during the heating operation, and the heat generated during this process is then transferred to the heat transfer medium.

[0028] As an optional implementation method, refer to Figure 2-3A porous evaporator 5 is provided, with one end of the porous evaporator 5 in contact with the bottom wall 2. In this embodiment, fuel enters the combustion chamber 1 from the porous evaporator 5, and air enters the combustion chamber 1 from the air inlet 21. To ensure that the air mixes with the fuel immediately upon entering the combustion chamber 1, one end of the porous evaporator 5 is in contact with the bottom wall 2, so that the bottom wall 2 is immediately filled with fuel vapor. The air, upon entering from the air inlet 21 on the bottom wall 2, immediately contacts the fuel vapor and begins to mix. In actual use, fuel is supplied to the medium of the porous evaporator 5 via a supply pipeline device, and is transported through an internal capillary network and distributed within the medium of the porous evaporator 5 by gravity. The inner wall of the medium of the porous evaporator 5 is exposed to the evaporation chamber, thereby evaporating the fuel within the porous evaporator 5. The evaporated fuel vapor fills the combustion chamber 1 near the bottom wall 2. Air enters from the bottom wall 2, so that although the fuel vapor fills the combustion chamber 1 near the bottom wall 2, it cannot escape through the holes on the bottom wall 2. The air enters from the bottom wall 2 and comes into contact with the fuel vapor immediately and begins to mix, achieving more thorough mixing and thus improving combustion efficiency.

[0029] As an optional implementation, a specific structure for a combustion assembly is provided, further comprising: an injection pipe connected to an outlet pipe 4, used to inject water or water vapor into the outlet pipe 4. In this embodiment, when fuel oil is used for combustion, carbon deposits inevitably occur in the combustion chamber 1 and related pipelines. These carbon deposits accumulate on the inner wall and are difficult to clean, affecting the working efficiency of the combustion assembly. Therefore, when the carbon deposits reach a certain level, external water or water vapor needs to be introduced to remove the carbon deposits from the combustion assembly through a chemical reaction between water and carbon. When deciding on the specific location for introducing external water or steam, the impact on combustion needs to be considered. Therefore, the specific location for introducing external water or steam is set at the outlet pipe 4. High-temperature mixed gas with a certain pressure flows through the outlet pipe 4. When introducing external water or steam, the water can be evaporated into steam and heated (high-temperature steam can also be introduced directly, but additional heating equipment is required. This method can be used to improve the efficiency of removing carbon deposits during regular equipment maintenance). At the same time, the mixed gas in the outlet pipe 4 increases the steam pressure, and when it enters the combustion chamber 1 through the recirculation inlet 22, although the temperature is lower, the airflow is more active, which makes the mixed gas with steam mix more thoroughly with the air. This allows the steam to come into more thorough contact with the carbon deposits deposited on the combustion chamber 1 and the inner wall of the bottom wall 2, achieving the purpose of efficiently removing carbon deposits while minimizing the impact on combustion.

[0030] As an optional implementation method, refer to Figure 2-3This invention provides a specific structure for a combustion assembly, including a purge pipe 23. The purge pipe 23 is a hollow tube, located on the bottom wall 2 facing the combustion chamber 1 and connected to the recirculation inlet 22. In this embodiment, when fuel oil is used for combustion, carbon deposits inevitably occur in the combustion chamber 1 and related pipelines. These carbon deposits typically accumulate on the porous evaporator 5 or the inner wall surface of the combustion chamber 1. Multiple layers of these deposits can severely affect the normal operation of related components, and the carbon deposits at the bottom are difficult to contact with steam during cleaning, significantly reducing the efficiency of carbon removal. Therefore, the purge pipe 23 is provided to lift the deposited carbon, preventing multiple layers from accumulating. In actual use, recirculated gas is pressurized by the gas distributor 3 and enters the outlet pipe 4, which then flows into the combustion chamber 1 through the recirculation inlet 22. The purge pipe 23 further regulates the recirculated gas entering the combustion chamber 1, ensuring that the pressurized recirculated gas, upon entering the combustion chamber, drives the airflow, thereby lifting the carbon deposits on the surface of the components and preparing for further carbon removal using steam.

[0031] As an optional implementation, a specific structure for the purge pipe 23 is provided, wherein the diameter of the purge pipe 23 gradually decreases from the end facing the bottom wall 2 towards the combustion chamber 1. In this embodiment, the recirculated gas is pressurized by the gas distributor 3 and enters the outlet pipe 4, and then sent into the combustion chamber 1 through the recirculation inlet 22. The purge pipe 23 is used to further regulate the recirculated gas entering the combustion chamber 1. During the regulation process of the recirculated gas entering the combustion chamber 1, it is necessary to fully consider that there is sufficient force to drive the airflow to lift the carbon deposits. For this purpose, the diameter of the purge pipe 23 is set to gradually decrease from the end facing the bottom wall 2 towards the combustion chamber 1, thereby continuously pressurizing the recirculated gas entering the purge pipe 23. When the recirculated gas is blown out of the purge pipe 23, it has a considerable air pressure, which is sufficient to drive the airflow to lift or blow away the carbon deposits.

[0032] As an optional implementation method, refer to Figure 2-3A specific structure of a purge pipe 23 is provided, wherein purge holes 231 are provided on the side wall of the purge pipe 23. More preferably, multiple purge holes 231 are provided and evenly distributed around the side wall of the purge pipe 23. In this embodiment, when fuel is used for combustion, carbon deposits inevitably occur in the combustion chamber 1 and related pipelines. Carbon deposits usually accumulate on the surface of the bottom wall 2 facing the combustion chamber 1. If multiple layers accumulate, it will seriously affect the normal operation of related components, and the carbon deposits at the bottom are difficult to contact with steam during cleaning, thus greatly reducing the efficiency of carbon deposit removal. To this end, purge holes 231 are provided on the side wall of the purge pipe 23 to divide the recirculated gas entering the combustion chamber 1 into multiple directions. In actual use, the recirculated gas enters the combustion chamber 1 in multiple directions under the action of the purge pipe 23 and the purge holes 231, driving the airflow in the axial direction of the purge holes 231 in the combustion chamber 1, thereby lifting the carbon deposits on the surface of the bottom wall 2, preventing the accumulation of multiple layers of carbon deposits on the surface of the bottom wall 2, and facilitating the removal of carbon deposits.

[0033] As an optional implementation method, refer to Figure 5 The invention provides a specific structure for a combustion assembly, including an air guide duct 7. The air guide duct 7 is a hollow tube and is disposed outside the outlet pipe 4. One end of the air guide duct 7 near the bottom wall 2 is closed, and the other end is open. It guides air to flow through the outside of the outlet pipe 4 and into the combustion chamber 1 from the air inlet 21. In this embodiment, when the recirculated gas passes through the outlet pipe 4, it carries a high temperature, which causes the pipe wall of the outlet pipe 4 to become hot. This high temperature will cause heat loss when it exchanges heat with the outside air, reducing fuel utilization. Therefore, the air guide duct 7 is disposed outside the outlet pipe 4 so that the pipe wall of the outlet pipe 4 heats the air flowing into the combustion chamber 1, effectively utilizing this heat energy and increasing the initial temperature of the air entering the combustion chamber 1. In actual use, after entering the air duct 7, the air flows through the outside of the outlet pipe 4. The wall of the outlet pipe 4 heats the air for the first time. The air heated for the first time enters the combustion chamber 1 through the air inlet 21 on the bottom wall 2. At this time, the air heated for the first time at the first temperature gradient, the fuel vapor at the second temperature gradient, and the recirculated gas at the third temperature gradient are mixed. When the temperature of any gradient increases, the initial temperature of the mixture will increase. After the initial temperature increases, the heat loss from heating to combustion is reduced, thereby improving fuel utilization efficiency.

[0034] As an optional implementation method, refer to Figure 2-4The invention provides a specific structure for a combustion assembly, including a flame tube disposed at the end of the combustion chamber 1 facing away from the bottom wall 2. The flame tube is integrally formed with the combustion chamber 1 or detachably connected. Preferably, the flame tube and the combustion chamber 1 are connected using high-temperature resistant screws. In this embodiment, the fuel generates a large amount of heat after combustion in the combustion chamber 1, which needs to be transferred to the heat exchange medium through the flame tube. The wear rate of the combustion chamber 1 and the flame tube during use is not always the same. Therefore, the combustion chamber 1 and the flame tube are made detachable, so that when the combustion chamber 1 or the flame tube needs maintenance, only the parts that need maintenance need to be removed, instead of disassembling the entire assembly.

[0035] As an optional implementation method, refer to Figure 5 This invention provides a specific structure for a flame tube, wherein an air passage 61 is provided between the flame tube and the combustion chamber 1. In this embodiment, when heating a vehicle or other mobile device, the internal temperature is not necessarily the higher the better; a suitable temperature is required. Therefore, a second air supply is introduced at the connection between the combustion chamber 1 and the flame tube for temperature control. In actual use, the air entering from the air inlet 21 of the bottom wall 2 is the first air supply. After entering the combustion chamber 1, it is mixed and heated to form a high-temperature mixed gas. The air entering from the air passage 61 between the flame tube and the combustion chamber 1 is the second air supply. The second air supply does not undergo a heating process. When the high-temperature mixed gas enters the flame tube, it enters the combustion chamber 1, which has a certain cooling effect on the high-temperature mixed gas. That is, the amount of the second air supply depends on the temperature of the mixed gas entering the flame tube, thereby achieving the purpose of temperature control.

[0036] Reference Figure 1-5 The working process of the above-mentioned combustion components in actual operation is as follows:

[0037] When the equipment is started, air is supplied. Air enters through the air duct 7, flows past the outside of the outlet pipe 4, and enters the combustion chamber 1 through the air inlet 21 on the bottom wall 2. Inside the combustion chamber 1, the gas is divided into two parts by the gas distributor 3: heat exchange gas passing through the middle of the distributor 3 and recirculated gas passing through its edge. The heat exchange gas enters the flame tube after passing through the middle of the distributor 3, while the recirculated gas, after being pressurized at the edge of the distributor 3, enters the outlet pipe 4. The outlet pipe 4 then sends the recirculated gas into the combustion chamber 1 through the recirculation inlet 22 on the bottom wall 2. Once inside the combustion chamber 1, the recirculated gas is ejected at high pressure in multiple directions under the regulation of the purge pipe 23, driving the airflow. This completes the gas circulation.

[0038] After the gas completes its initial circulation, fuel is supplied and ignited. The fuel is fed into the porous evaporator 5 via a supply pipeline. It is transported through an internal capillary network and distributed within the porous evaporator 5 by gravity. The inner wall of the porous evaporator 5 is exposed to the evaporation chamber, allowing the fuel within the evaporator 5 to evaporate. The evaporated fuel vapor mixes thoroughly with the air in the combustion chamber 1, achieving complete combustion. Combustion produces a high-temperature gas mixture, combustion residues, and carbon deposits.

[0039] The high-temperature mixed gas circulates along the gas circulation path, generating heat to heat the interior space of the vehicle or gas-powered equipment. At this time, controlling the intake of the second air can control the temperature of the high-temperature mixed gas to prevent discomfort caused by excessively high internal temperature of the vehicle or gas-powered equipment.

[0040] Combustion residues and carbon deposits are dispersed within the combustion chamber 1 by the airflow through the purge pipe 23, ensuring more complete combustion while preventing their deposition on the surface of components. When the concentration of combustion residues and carbon deposits reaches a certain level or after a certain period of time, water or steam is injected through the outlet pipe 4. The water is evaporated into steam at high temperature upon entering the outlet pipe 4. The steam mixes with the recirculated gas and is then sent into the combustion chamber 1 through the recirculation inlet 22 on the bottom wall 2. Once inside the combustion chamber 1, it is ejected at high pressure in multiple directions under the regulation of the purge pipe 23, driving the airflow. The steam fully contacts and chemically reacts with the combustion residues and carbon deposits dispersed within the combustion chamber 1 at high temperature, thereby achieving the removal of combustion residues and carbon deposits.

[0041] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A combustion assembly, characterized in that, include: Combustion chamber (1), wherein the combustion chamber (1) is a hollow tube type; Bottom wall (2), the bottom wall (2) is provided on one end of the combustion chamber (1), and an air inlet (21) is provided on the bottom wall (2), and a recirculation inlet (22) is provided around the air inlet (21). The gas distribution device (3) is annular and is located on the inner wall of the combustion chamber (1) at the end facing away from the bottom wall (2). The outer wall of the gas distribution device (3) at the end facing away from the bottom wall (2) is attached to the inner wall of the combustion chamber (1). The outer wall of the gas distribution device (3) at the end facing the bottom wall (2) is inclined towards the axis. Outlet pipe (4), one end of the outlet pipe (4) is connected to the combustion chamber (1), and the other end of the outlet pipe (4) is connected to the recirculation inlet (22). The axial position of the outlet pipe (4) connected to the combustion chamber (1) is located on the outer wall of the gas distribution device (3) inclined towards the axis. The purge pipe (23) is a hollow tube and is located on the bottom wall (2) facing the combustion chamber (1) and connected to the recirculation inlet (22). The diameter of the purge pipe (23) gradually decreases from the end facing the bottom wall (2) toward the combustion chamber (1); The purge pipe (23) has a purge hole (231) on its side wall; A porous evaporator (5) is annular and is disposed on the inner wall of the combustion chamber (1) and is attached to the inner wall of the combustion chamber (1). The porous evaporator (5) is used to transport fuel or steam to the combustion chamber (1). One end of the porous evaporator (5) is in contact with the bottom wall (2).

2. The combustion assembly as described in claim 1, characterized in that, Also includes: The spray pipe is connected to the outlet pipe (4) and is used to spray water or water vapor into the outlet pipe (4).

3. The combustion assembly as described in claim 1, characterized in that, Also includes: Air duct (7), the air duct (7) is a hollow tube, the air duct (7) is located outside the outlet pipe (4), the air duct (7) is closed at one end near the bottom wall (2) and open at the other end, and is used to guide air to flow through the outside of the outlet pipe (4) and into the combustion chamber (1) from the air inlet (21).

4. The combustion assembly as described in claim 1, characterized in that, Also includes: Flame tube (6) is disposed at one end of the combustion chamber (1) facing away from the bottom wall (2). The flame tube (6) is integrally formed with the combustion chamber (1) or detachably connected.

5. The combustion assembly as described in claim 4, characterized in that, An air passage (61) is provided between the flame tube (6) and the combustion chamber (1).

Images