CN117212787A - Combustion assembly - Google Patents

Abstract

The application discloses a combustion assembly, comprising: the combustion chamber is a hollow pipe; a bottom wall, which is arranged at one end of the combustion chamber in a covering manner, is provided with an air inlet, and is provided with a recirculation inlet at the periphery; the gas distribution device is annular and is arranged on the inner wall of the combustion chamber, which is opposite to one end of the bottom wall, the outer wall of the gas distribution device is opposite to one end of the bottom wall and is attached to the inner wall of the combustion chamber, and the outer wall of the gas distribution device is inclined towards the axis towards one end of the bottom wall; and one end of the eduction tube is communicated with the combustion chamber, the other end of the eduction tube is communicated with the recirculation inlet, and the axial position of the eduction tube communicated with the combustion chamber is positioned at the position of the outer wall of the gas distributing device inclined to the axis. The recycled gas with high air pressure and high temperature exchanges heat with the air entering through the air inlet when contacting, so that the initial temperature of the air entering through the air inlet is increased, and the finally obtained combustion temperature is also increased, thereby obtaining higher combustion temperature.

Description

Combustion assembly

Technical Field

The application relates to the field of heating devices, in particular to a combustion assembly.

Background

It is often necessary in heaters or reformers to provide a combustion assembly for evaporating or combusting during a heating operation and transferring heat generated during the heating operation to the infectious agent, the combustion temperature within the combustion assembly and the combustion efficiency play a vital role in the efficient use of fuel. Particularly in vehicles or other mobile devices, there is a need for internal heating in cold winter, and there are difficulties but urgent needs for efficient use of fuel due to the relative miniaturization of the devices and the limited amount of portable fuel.

Disclosure of Invention

The application mainly aims to provide a combustion assembly, which aims to solve the technical problems of combustion temperature and combustion efficiency.

To achieve the above object, the present application provides a combustion assembly comprising: the combustion chamber is a hollow pipe; a bottom wall, which is arranged at one end of the combustion chamber in a covering manner, is provided with an air inlet, and is provided with a recirculation inlet at the periphery; the gas distribution device is annular and is arranged on the inner wall of the combustion chamber, which is opposite to one end of the bottom wall, the outer wall of the gas distribution device is opposite to one end of the bottom wall and is attached to the inner wall of the combustion chamber, and the outer wall of the gas distribution device is inclined towards the axis towards one end of the bottom wall; and one end of the eduction tube is communicated with the combustion chamber, the other end of the eduction tube is communicated with the recirculation inlet, and the axial position of the eduction tube communicated with the combustion chamber is positioned at the position of the outer wall of the gas distributing device inclined to the axis.

Optionally, the method further comprises: the porous evaporator is annular, is arranged on the inner wall of the combustion chamber and is attached to the inner wall of the combustion chamber, and the porous evaporator is used for conveying fuel or steam to the combustion chamber. The fuel is fed into the combustion chamber through the porous evaporator, so that the fuel is dispersed around the combustion chamber before entering the combustion chamber, the fuel is more favorable for being mixed with air after entering the combustion chamber, the combustion is more sufficient, and the combustion efficiency is greatly improved.

Optionally, one end of the porous evaporator is in contact with the bottom wall. When the fuel enters the combustion chamber through the porous evaporator, the fuel enters from one end of the bottom wall, so that the fuel and the air are mixed earlier, the mixing is more sufficient, and the combustion efficiency is improved.

Optionally, the method further comprises: and the injection pipe is communicated with the eduction pipe and is used for injecting water or steam into the eduction pipe. When the fuel oil is used for combustion, the phenomena such as carbon deposition and the like are unavoidable, and the carbon deposition is removed by spraying water or steam into the assembly to enable the steam to chemically react with carbon.

Optionally, the method further comprises: and the purging pipe is hollow, is arranged on one side of the bottom wall facing the combustion chamber and is communicated with the recycling inlet. When in actual use, the surface of the porous evaporator is easy to generate carbon deposition and other phenomena, the carbon deposition is difficult to remove, not only the combustion efficiency is influenced, but also the output of fuel is influenced, and the recycle gas with certain pressure entering the combustion chamber is guided to cause air flow, so that the carbon deposition on the surface of the porous evaporator is lifted, and sufficient preparation is made for further removing the carbon deposition by utilizing steam.

Alternatively, the pipe diameter of the purge pipe gradually decreases from the end facing the bottom wall toward the end of the combustion chamber. The air pressure of the recirculated gas when entering the combustion chamber is enhanced, so that the air flow is more active, which is not only beneficial to mixing fuel and air, but also beneficial to raising carbon deposition.

Optionally, a purge hole is provided on the purge tube sidewall. In the in-service use, the carbon deposition phenomenon appears easily in the diapire, and this kind of carbon deposition is difficult to clear, can lead to the fact the influence to combustion efficiency, through set up on the sweeping pipe lateral wall sweep the hole with recycle gas reposition of redundant personnel to guide the recycle gas of reposition of redundant personnel, thereby raise the carbon deposition on the diapire, for utilizing steam to further clear away the carbon deposition and make sufficient preparation.

Optionally, the method further comprises: the air guide pipe is hollow pipe type, and the air guide pipe is arranged outside the eduction pipe, one end of the air guide pipe, which is close to the bottom wall, is arranged in a closed mode, and the other end of the air guide pipe is arranged in an opening mode and used for guiding air to flow into the combustion chamber from the air inlet after flowing through the outside of the eduction pipe. The temperature in the eduction tube can be further utilized, and a multi-step temperature gradient is formed in the combustion chamber, so that the temperature of air entering the combustion chamber from the air inlet is greatly improved, the heat loss is reduced, and the heating temperature is improved, and the overall efficiency of the assembly is greatly improved.

Optionally, the method further comprises: and the flame tube is arranged at one end of the combustion chamber, which is opposite to the bottom wall, and is integrally formed with or detachably connected with the combustion chamber. When the heat energy of the high-temperature air in the combustion chamber is transferred to the heater or the reformer, the flame tube is required to be connected and transited, and the flame tube is arranged in a detachable mode, so that the maintenance and the replacement are more convenient.

Optionally, an air passage is provided between the flame tube and the combustion chamber. Through introducing the second way air, not only can help combustion chamber and flame tube air mixing, also can play the effect of regulation and control temperature, be favorable to adapting to the user demand of different scenes.

The application has the following technical effects: in the application, the annular gas dividing device divides high-temperature mixed gas in the combustion chamber into: heat exchange gas passing through the middle part of the gas dividing device and recycle gas passing through the inclined position of the outer wall of the gas dividing device. The outer wall of the gas distributing device is inclined towards the end of the bottom wall to form a funnel shape towards the axis, the recirculated gas is extruded to have certain gas pressure when passing through the position, and the recirculated gas with certain gas pressure is led out through the eduction tube and reenters the combustion chamber from the circulating inlet. At this time, the recirculated gas has a certain air pressure and a high temperature, and the air coming in from the air inlet and the recirculated gas with air pressure can activate the air flow when contacting, so that the air flow in the combustion chamber is more active, and the fuel or steam is more fully mixed with the air, so as to improve the combustion efficiency. At the same time, the recycle gas with high air pressure and high temperature exchanges heat with the air entering from the air inlet when contacting, so that the initial temperature of the air entering from the air inlet is increased, the same heat quantity is adopted, and under the condition that the initial temperature is increased, the finally obtained combustion temperature is also increased, thereby obtaining higher combustion temperature. Finally, the combustion efficiency and the combustion temperature of the combustion assembly are improved, so that the overall efficiency of the combustion assembly is greatly improved.

Drawings

FIG. 1 is a schematic top view of a combustion assembly of the present disclosure;

FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1;

FIG. 3 is an enlarged schematic view of the portion B in FIG. 2;

FIG. 4 is a schematic view of a combustion assembly according to the present disclosure;

FIG. 5 is a schematic view of the air duct and the air channel of the present application;

wherein: 1-combustion chamber, 2-bottom wall, 21-air inlet, 22-recycle inlet, 23-purge pipe, 231-purge hole, 3-gas separation device, 4-eduction pipe, 5-porous evaporator, 6-flame pipe, 61-air channel, 7-guide duct.

The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

Referring to fig. 1-4, a first embodiment of the present application provides a combustion assembly comprising: the combustion chamber 1, the combustion chamber 1 is a hollow tube; a bottom wall 2, wherein the bottom wall 2 is arranged at one end of the combustion chamber 1 in a covering manner, an air inlet 21 is arranged on the bottom wall 2, and a recirculation inlet 22 is arranged around the air inlet 21; the gas distribution device 3 is annular, the gas distribution device 3 is arranged on the inner wall of the combustion chamber 1, which is opposite to one end of the bottom wall 2, one end of the outer wall of the gas distribution device 3, which is opposite to the bottom wall 2, is attached to the inner wall of the combustion chamber 1, and one end of the outer wall of the gas distribution device 3, which is opposite to the bottom wall 2, is inclined towards the axis; and one end of the eduction tube 4 is communicated with the combustion chamber 1, the other end of the eduction tube 4 is communicated with the recirculation inlet 22, and the axial position of the eduction tube 4 communicated with the combustion chamber 1 is positioned at a position of inclining the outer wall of the gas distributing device 3 towards the axis. In the present embodiment, the annular gas separation device 3 separates the high-temperature mixed gas in the combustion chamber 1 into: heat exchange gas passing through the middle part of the gas dividing device 3 and recycle gas passing through the inclined position of the outer wall of the gas dividing device 3. The outer wall of the gas distributing device 3 is inclined towards the end of the bottom wall 2 to form a funnel shape towards the axis, the recycle gas is extruded to have certain gas pressure when passing through the position, and the recycle gas with certain gas pressure is led out through the lead-out pipe 4 and re-enters the combustion chamber 1 from the recycle inlet. At this time, the recirculated gas has a certain air pressure and a high temperature, and the air coming in from the air inlet 21 and the recirculated gas having the air pressure will activate the air flow when contacting, so that the air flow in the combustion chamber 1 is more active, and the fuel or steam and the air are more fully mixed, so as to improve the combustion efficiency. At the same time, the recirculated gas with high air pressure and high temperature exchanges heat with the air entering through the air inlet 21 during contact, so that the initial temperature of the air entering through the air inlet 21 is increased, and the same heat quantity is adopted, and under the condition that the initial temperature is increased, the finally obtained combustion temperature is also increased, so that the higher combustion temperature is obtained. Finally, the combustion efficiency and the combustion temperature of the combustion assembly are improved, so that the overall efficiency of the combustion assembly is greatly improved.

As an alternative embodiment, referring to fig. 2-3, there is provided a specific structure of a combustion assembly, further comprising: the porous evaporator 5, the porous evaporator 5 is annular, and the porous evaporator 5 sets up in combustion chamber 1 inner wall and laminating with combustion chamber 1 inner wall, and porous evaporator 5 is used for carrying fuel or steam to combustion chamber 1. In the present embodiment, when fuel or steam is supplied to the combustion chamber 1, it is necessary to consider how much fuel or steam and air can be mixed to improve combustion efficiency, and also to consider the problems of the influence of internal carbon deposition on the supply device, the cost of the supply device, and the like. For this purpose, fuel is supplied to the combustion chamber 1 through the annular porous evaporator 5, the annular porous evaporator 5 is provided on the inner wall of the combustion chamber 1 and is bonded 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, and the fuel in the porous evaporator 5 can only enter the combustion chamber 1 through the inner wall of the porous evaporator 5, which corresponds to the fuel entering the combustion chamber 1 through the inner wall of the combustion chamber 1. The air inlet 21 is arranged on the bottom wall 2, the bottom wall 2 is arranged at one end of the combustion chamber 1 in a covering manner, when the air enters the combustion chamber 1 from the air inlet 21 in operation, the air is necessarily positioned in the side wall of the combustion chamber 1, and the fuel enters the combustion chamber 1 from the porous evaporator 5, which is equivalent to entering the combustion chamber 1 from the side wall of the combustion chamber 1, so that the initial contact area of the fuel and the air is greatly improved, and more sufficient mixing of the fuel and the air is realized. In practice, the porous evaporator 5 may be made of wire mesh, braided wire, ceramic foam, etc., and the fuel is supplied to the porous evaporator 5 medium via a supply line means, transported by an internal capillary network and distributed in the porous evaporator 5 medium by gravity, and the inner wall of the porous evaporator 5 medium is exposed to the evaporation chamber so that the fuel in the porous evaporator 5 is evaporated. The vaporized fuel vapor is introduced into the central region of the combustion chamber 1 with air entering through the air inlet 21 to provide relatively thorough mixing of the fuel vapor with air, thereby providing a combustible mixture over the entire volumetric region of the vaporization chamber. Subsequently, it evaporates or burns during the heating operation, the heat generated during which is then transferred to the heat transfer medium.

As an alternative embodiment, referring to fig. 2-3, a porous evaporator 5 is provided, with one end of the porous evaporator 5 being in contact with the bottom wall 2. In this embodiment, fuel enters the combustion chamber 1 from the porous evaporator 5, air enters the combustion chamber 1 from the air inlet 21, and in order to mix the air with the fuel at a first time after entering the combustion chamber 1, one end of the porous evaporator 5 is brought into contact with the bottom wall 2, so that the bottom wall 2 is filled with fuel vapor, and the air comes into contact with the fuel vapor at a first time after entering from the air inlet 21 of the bottom wall 2 provided above, and mixing is started. In actual use, fuel is supplied to the porous evaporator 5 medium via the supply line means, transported by the internal capillary network and distributed by gravity in the porous evaporator 5 medium, the inner walls of the porous evaporator 5 medium being exposed to the evaporation chamber so that the fuel within the porous evaporator 5 is evaporated. The evaporated fuel vapor is filled at one end of the combustion chamber 1 close to the bottom wall 2, air enters from one end of the bottom wall 2, so that the fuel vapor can not escape through the aperture on the bottom wall 2 although the fuel vapor is filled at one end of the combustion chamber 1 close to the bottom wall 2, and the air contacts with the fuel vapor and starts to be mixed at the first time after entering from one end of the bottom wall 2, so that more sufficient mixing is realized, and the combustion efficiency is improved.

As an alternative embodiment, there is provided a specific structure of a combustion assembly, further comprising: and an injection pipe which is communicated with the eduction pipe 4 and is used for injecting water or water vapor into the eduction pipe 4. In this embodiment, when the fuel is used for combustion, carbon deposition and other phenomena will not be avoided in the combustion chamber 1 and related pipelines, carbon deposition will be deposited on the inner wall, and cleaning is difficult, and the working efficiency of the combustion assembly is improved. For this reason, external water or steam is required to be introduced when the carbon deposit is to some extent, and the carbon deposit in the combustion assembly is removed by chemical reaction of water with carbon. In order to determine the specific position of the external water or steam to be introduced, the specific position of the external water or steam to be introduced is set in the eduction tube 4, and the high-temperature mixed gas with a certain pressure is introduced into the eduction tube 4, so that when the external water or steam is introduced, the water can be evaporated into steam and heated (the high-temperature steam can be directly introduced, but additional heating equipment is needed, the efficiency of removing carbon deposit can be improved in the way of carrying out periodical maintenance of the equipment), and the pressure is further enhanced when the mixed gas in the eduction tube 4 is increased, and when the mixed gas enters the combustion chamber 1 through the recirculation inlet 22, the temperature is reduced, but the air flow is more active, the mixed gas mixed with the steam is more fully mixed with the air, thereby the steam is more fully contacted with the steam to realize the purpose of removing the carbon deposit effectively, and the influence on the combustion is minimized.

As an alternative embodiment, referring to fig. 2-3, there is provided a specific structure of a combustion assembly, further comprising: the purge pipe 23, the purge pipe 23 is hollow tubular, and the purge pipe 23 is disposed on the side of the bottom wall 2 facing the combustion chamber 1 and communicates with the recirculation inlet 22. In this embodiment, when the fuel is used for combustion, carbon deposition and other phenomena will not be avoided in the combustion chamber 1 and related pipelines, and carbon deposition will be deposited on the inner wall surface of the porous evaporator 5 or the combustion chamber 1, and if multiple layers are deposited, the normal operation of related components will be seriously affected, and carbon deposition deposited on the bottom will not be in contact with steam during cleaning, thereby greatly reducing the efficiency of cleaning carbon deposition. For this purpose, a purge pipe 23 is provided to lift deposited carbon deposition, thereby avoiding the occurrence of deposition of multiple layers. In actual use, the recycle gas enters the eduction tube 4 after being pressurized by the gas separation device 3, and then is sent into the combustion chamber 1 by the eduction tube 4 through the recycle inlet 22, and the purge tube 23 is used for further regulating the recycle gas entering the combustion chamber 1, so that the recycle gas with pressure drives the gas flow when entering the combustion, thereby raising carbon deposit on the surface of the device, and making sufficient preparation for further removing carbon deposit by utilizing steam.

As an alternative embodiment, a specific structure of the purge pipe 23 is provided, the pipe diameter of the purge pipe 23 gradually decreasing from the end facing the bottom wall 2 toward the end of the combustion chamber 1. In this embodiment, the recycle gas is pressurized by the gas separator 3 and then enters the outlet pipe 4, and is then fed from the outlet pipe 4 into the combustion chamber 1 through the recycle inlet 22, and the purge pipe 23 is used to further regulate the recycle gas entering the combustion chamber 1. In the process of adjusting the recycle gas entering the combustion chamber 1, sufficient force is required to be considered to drive the gas flow to lift carbon deposition, for this purpose, the pipe diameter of the purge pipe 23 is gradually reduced from the end facing the bottom wall 2 to the end of the combustion chamber 1, so that the recycle gas entering the purge pipe 23 is continuously pressurized, and when the recycle gas is blown out from the purge pipe 23, the recycle gas has a considerable gas pressure, so that the recycle gas can drive the gas flow to lift or blow carbon deposition.

As an alternative embodiment, referring to fig. 2-3, a specific structure of the purge tube 23 is provided, and purge holes 231 are provided on the side wall of the purge tube 23. More preferably, the purge holes 231 are provided in plurality and uniformly distributed around the sidewall of the purge tube 23. In this embodiment, when the fuel is used for combustion, carbon deposition and other phenomena will not be avoided in the combustion chamber 1 and related pipelines, and carbon deposition will be deposited on the surface of the bottom wall 2 facing the combustion chamber 1, and if multiple layers are deposited, the normal operation of related components will be seriously affected, and carbon deposition deposited on the bottom is difficult to contact with steam during cleaning, so that the efficiency of cleaning carbon deposition is greatly reduced. For this reason, the side wall of the purge tube 23 is provided with purge holes 231 to divide the recycle gas entering the combustion chamber 1 into a plurality of directions, and during practical use, the recycle gas enters the combustion chamber 1 in a plurality of directions under the action of the purge tube 23 and the purge holes 231 to drive the air flow in the axial direction of the purge holes 231 in the combustion chamber 1, so as to lift the carbon deposit on the surface of the bottom wall 2, so that the surface of the bottom wall 2 cannot deposit a plurality of layers of carbon deposit, and the removal of the carbon deposit is facilitated.

As an alternative embodiment, referring to fig. 5, there is provided a specific structure of a combustion assembly, further comprising: the air guide pipe 7, the air guide pipe 7 is hollow pipe type, and the air guide pipe 7 sets up in the delivery pipe 4 outside, and the one end that the air guide pipe 7 is close to diapire 2 is for sealing the setting, and the other end is the opening setting for after guiding the air flow to follow air inlet 21 and flow into combustion chamber 1 after the delivery pipe 4 outside. In this embodiment, when the recycle gas passes through the outlet pipe 4, the high temperature is carried by the recycle gas, so that the wall of the outlet pipe 4 is provided with the high temperature, and the high temperature can cause temperature loss when exchanging heat with the external air, thereby reducing the utilization rate of the fuel. For this reason, the air duct 7 is provided outside the outlet pipe 4, so that the air flowing into the combustion chamber 1 is heated by the wall of the outlet pipe 4, and this part of heat energy is effectively utilized, and the initial temperature of the air flowing into the combustion chamber 1 is also increased. When in actual use, air flows through the outer side of the eduction tube 4 after entering the air guide tube 7, the wall of the eduction tube 4 heats the air for the first time, and the air after the first heating enters the combustion chamber 1 from the air inlet 21 on the bottom wall 2, at this time: the air heated for the first time in the first temperature gradient, the fuel vapor in the second temperature gradient and the recycle gas in the third temperature gradient are mixed, wherein the initial temperature after mixing is increased after the temperature of any gradient is increased, and the heat loss from heating to combustion is reduced after the initial temperature is increased, so that the fuel utilization efficiency is improved.

As an alternative embodiment, referring to fig. 2-4, there is provided a specific structure of a combustion assembly, further comprising: and the flame tube is arranged at one end of the combustion chamber 1, which is opposite to the bottom wall 2, and is integrally formed with or detachably connected with the combustion chamber 1. Preferably, the flame tube is connected to the combustion chamber 1 with a high resistance Wen Luoding. In this embodiment, the fuel generates a lot of heat after the combustion of the combustion chamber 1, and needs to be transferred to the heat exchange medium through the flame tube, and the wear progress of the combustion chamber 1 and the flame tube in the use process is not always consistent, for this reason, the combustion chamber 1 and the flame tube are arranged in a detachable manner, so that when the combustion chamber 1 or the flame tube needs maintenance, only the parts needing maintenance need to be detached, and the parts needing maintenance do not need to be detached completely.

As an alternative embodiment, referring to fig. 5, a specific structure of a flame tube is provided, between which an air passage 61 is provided with the combustion chamber 1. In this embodiment, when heating the vehicle or other mobile equipment, it is preferable that the temperature of the interior space is not as high as possible, and a suitable temperature is required, for which purpose the second air is introduced at the junction of 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 path of air, is mixed and heated after entering the combustion chamber 1 to form high-temperature mixed gas, the air entering from the air channel 61 arranged between the flame tube and the combustion chamber 1 is the second path of air, the second path of air does not have a heating process, enters the combustion chamber 1 when the high-temperature mixed gas enters the flame tube, plays a certain cooling role on the high-temperature mixed gas, namely the quantity of the second path of air depends on the temperature of the mixed gas entering the flame tube, and therefore the purpose of temperature control is achieved.

Referring to fig. 1-5, the combustion assembly described above operates in practice as follows:

the starting device starts to supply air, and at this time, air enters from the air guide pipe 7, flows through the outer side of the air guide pipe 4 and enters the combustion chamber 1 from the air inlet 21 of the bottom wall 2, and gas in the combustion chamber 1 is divided into two parts when flowing through the gas dividing device 3, namely heat exchange gas passing through the middle part of the gas dividing device 3 and recycle gas passing through the edge of the gas dividing device 3. The heat exchange gas passes through the middle part of the gas distribution device 3 and then enters the flame tube, the recycle gas is pressurized at the edge position of the gas distribution device 3 and then enters the eduction tube 4, the eduction tube 4 sends the recycle gas into the combustion chamber 1 through the recycle inlet 22 on the bottom wall 2, and the recycle gas is sprayed out in a plurality of directions under the adjustment of the purge tube 23 after entering the combustion chamber 1, so as to drive the gas flow. Thus, the gas circulation is completed.

After the gas has completed the preliminary cycle, fuel is delivered and ignited, the fuel is delivered into the porous evaporator 5, the fuel is supplied via the supply line means into the porous evaporator 5 medium, delivered by the internal capillary network and distributed by gravity in the porous evaporator 5 medium, the inner walls of the porous evaporator 5 medium are exposed to the evaporation chamber so that the fuel in the porous evaporator 5 is evaporated. The evaporated fuel vapor is fully mixed with the air in the combustion chamber 1 to realize full combustion, and high-temperature mixed gas, combustion residues and carbon deposit are generated after combustion.

The high-temperature mixed gas circulates according to the gas circulation path to generate heat to heat the internal space of the vehicle or the gas mobile equipment, and at the moment, the air inflow of the second path of air is controlled to control the temperature of the high-temperature mixed gas so as to prevent discomfort caused by overhigh temperature of the internal space of the vehicle or the gas mobile equipment.

The combustion residues and carbon deposits are diffused in the combustion chamber 1 by the air flow of the purge pipe 23, and are prevented from being deposited on the surfaces of the parts while being burned more sufficiently. When the combustion residues and the carbon deposit concentration reach a certain degree or after a certain time, water or water vapor is sprayed into the eduction tube 4, the water is evaporated into water vapor at a high temperature after entering the eduction tube 4, the water vapor is mixed with the recycle gas and then is sent into the combustion chamber 1 through the recycle inlet 22 on the bottom wall 2, and the mixture is sprayed out in a plurality of directions under the adjustment of the purge tube 23 after entering the combustion chamber 1, so that the air flow is driven. The steam is fully contacted with the combustion residues and carbon deposits diffused in the combustion chamber 1 at high temperature and chemically reacts, so that the combustion residues and carbon deposits are removed.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A combustion assembly, comprising:

a combustion chamber (1), wherein the combustion chamber (1) is a hollow tube;

the bottom wall (2) is arranged at one end of the combustion chamber (1) in a covering mode, an air inlet (21) is formed in the bottom wall (2), and recirculation inlets (22) are formed in the periphery of the air inlet (21);

the gas distribution device (3), the gas distribution device (3) is annular, the gas distribution device (3) is arranged on the inner wall of the combustion chamber (1) facing away from one end of the bottom wall (2), the outer wall of the gas distribution device (3) facing away from one end of the bottom wall (2) is attached to the inner wall of the combustion chamber (1), and the outer wall of the gas distribution device (3) faces one end of the bottom wall (2) and inclines towards the axis;

the eduction tube (4), eduction tube (4) one end with combustion chamber (1) intercommunication, eduction tube (4) other end with recirculating inlet (22) intercommunication, eduction tube (4) with the axial position of combustion chamber (1) intercommunication is located the outer wall of gas distributor (3) is to the position of axis slope.

2. The combustion assembly of claim 1, further comprising:

the porous evaporator (5), porous evaporator (5) are annular, porous evaporator (5) set up in combustion chamber (1) inner wall and with combustion chamber (1) inner wall laminating, porous evaporator (5) are used for carrying fuel or steam to combustion chamber (1).

3. A combustion assembly according to claim 2, wherein one end of the porous evaporator (5) is in contact with the bottom wall (2).

4. The combustion assembly of claim 1, further comprising:

and the injection pipe is communicated with the eduction pipe (4) and is used for injecting water or steam into the eduction pipe (4).

5. The combustion assembly of claim 1, further comprising:

the purging pipe (23), the purging pipe (23) is hollow tubular, the purging pipe (23) set up in diapire (2) face combustion chamber (1) one side and with recirculation entry (22) intercommunication.

6. A combustion assembly according to claim 5, wherein the diameter of the purge tube (23) decreases gradually from the end facing the bottom wall (2) towards the end of the combustion chamber (1).

7. A combustion assembly according to claim 5, wherein the purge tube (23) is provided with purge holes (231) in the side wall.

8. The combustion assembly of claim 1, further comprising:

the air guide pipe (7), air guide pipe (7) are cavity tubular, air guide pipe (7) set up in the extraction pipe (4) outside, air guide pipe (7) be close to diapire (2) one end be closed setting, the other end is the opening setting, be used for guiding the air flow through after extraction pipe (4) outside follow air inlet (21) inflow combustion chamber (1).

9. The combustion assembly of claim 1, further comprising:

the flame tube (6), flame tube (6) set up in combustion chamber (1) dorsad diapire (2) one end, flame tube (6) with combustion chamber (1) integrated into one piece or detachable connection.

10. A combustion assembly according to claim 9, wherein an air channel (61) is provided between the flame tube (6) and the combustion chamber (1).