Burner assembly

Abstract

According to the burner assembly, fuel or gas entering from at least two inlet pipes can enter a combustion chamber of a burner body to be combusted and then is transmitted to a combustion furnace through spraying holes communicated with the combustion chamber, the inlet pipes are controllable in on-off, and the burner can be shut down by closing the inlet pipes. One end of the purging pipe is an insertion end, the on-off of the purging pipe can be controlled, the insertion end of the purging pipe is inserted into the pipe hole of one inlet pipe, the nozzle is communicated with the insertion end inserted into the pipe hole of the insertion pipe, the nozzle is also located in the pipe hole of the inlet pipe, and a spout of the nozzle faces the inlet end of the inlet pipe. When the burner is shut down, the purging pipe can be opened, so that purging gas enters the purging pipe, flows into the nozzle from the insertion end and then flows through the combustion chamber of the inlet end and the burner from the nozzle, the possibility of dust accumulation in the combustion chamber is reduced, and the frequency of cleaning and maintenance of the burner is reduced; the technical problem that the working efficiency of the combustion furnace is influenced by frequent maintenance of the burner is solved to a certain extent.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of burners, and particularly relates to a burner assembly. BACKGROUND

[0002] A burner is a common name of a combustion device used on an industrial fuel furnace, which plays a role of distributing fuel and combustion air and spraying out in a certain way for combustion. Air and fuel can be mixed and combusted in a combustion chamber of the burner, and then sprayed out from a spray hole of the burner, the spray hole being communicated with a combustion furnace, and the combusted mixed medium can enter the combustion furnace.

[0003] At present, a combustion furnace with slightly complex functions needs to be provided with at least two burners. When the combustion furnace is in normal production, one of the burners may be in operation, and the other burner may be in stoppage. In this case, dust generated by combustion in the combustion furnace is accumulated in the stoppage burner, which affects subsequent ignition work of the stoppage burner, and frequent maintenance and cleaning of the stoppage burner are needed, and the frequent maintenance of the burner affects the normal working efficiency of the combustion furnace. CONTENT OF THE UTILITY MODEL

[0004] The application aims to at least solve the technical problem that frequent maintenance of a burner affects the working efficiency of a combustion furnace. To this end, the application provides a burner assembly.

[0005] The application provides a burner assembly, which comprises:

[0006] A burner body is provided with a combustion chamber and a spray hole communicated with the combustion chamber;

[0007] At least two inlet pipes are controlled in on-off mode, and each of the inlet pipes is provided with an inlet end communicated with the combustion chamber;

[0008] A purge pipe is controlled in on-off mode, and one end of the purge pipe is configured as an insertion end, and the insertion end is inserted into a pipe hole of one of the inlet pipes;

[0009] A nozzle is communicated with the insertion end, and a spray opening of the nozzle is directed to the inlet end of the inlet pipe.

[0010] In some or certain embodiments, the purge pipe comprises a coaxially communicated air inlet section and an insertion section, one end of the insertion section away from the air inlet section is configured as an insertion end, and a hole diameter of the insertion section is smaller than a hole diameter of the air inlet section.

[0011] In some or certain embodiments, a longitudinal section of a hole corresponding to the insertion section is in the shape of a sandglass.

[0012] In some or certain embodiments, an axial opening of the insertion end is closed, and a peripheral wall of the insertion end is provided with a through hole, two ends of the through hole are respectively communicated with an inner hole of the purge pipe and the spray opening of the nozzle.

[0013] In some or certain embodiments, the nozzle comprises:

[0014] a body provided with a communication hole, one end of the communication hole being communicated with the insertion end, and the other end of the communication hole being configured as the spout;

[0015] an acceleration part in the shape of a fan and provided at the spout.

[0016] In some or certain embodiments, the hole diameter of the purge pipe is smaller than the hole diameter of each of the inlet pipes, and the burner assembly further comprises:

[0017] at least two first control valves, one for each of the at least two inlet pipes, for controlling the on-off of the corresponding inlet pipe;

[0018] a second control valve provided at the purge pipe for controlling the on-off of the purge pipe.

[0019] In some or certain embodiments, the burner assembly comprises two inlet pipes with different hole diameters, the inlet pipe with the larger hole diameter is configured as an air pipe, and the inlet pipe with the smaller hole diameter is configured as a gas pipe, the purge pipe is provided at the gas pipe, the insertion end of the air pipe is opposite to the spout of the combustion chamber, and the insertion end of the gas pipe is located at the same side of the air pipe and the spout.

[0020] In some or certain embodiments, the combustion chamber is provided with an inlet communicated with the air pipe and the combustion chamber, and the combustion chamber is further provided with an acceleration structure at the inlet.

[0021] In some or certain embodiments, the burner assembly further comprises:

[0022] a plurality of spouts, each of which is communicated to the combustion chamber and is connected to the burner body around the spout in an interval, and the hole diameter of each of the spouts is smaller than the hole diameter of the spout.

[0023] In some or certain embodiments, the burner assembly further comprises:

[0024] a medium supply carrier provided with a medium supply end communicated with the purge pipe.

[0025] According to one or more embodiments of the present application, the following beneficial effects are provided:

[0026] The combustion chamber of the burner body in the burner assembly can provide a space for fuel and air to mix and burn. The injection hole in communication with the combustion chamber can be communicated to the combustion furnace to carry the mixed and burned gas in the combustion chamber to the combustion furnace to transfer heat. The at least two inlet pipes in communication with the combustion chamber can be used to deliver fuel and air to the combustion chamber for mixing and burning. The inlet pipe can be controlled to open and close, so that the inlet pipe can be closed after the fuel and air are delivered to the combustion chamber to ensure normal combustion in the combustion chamber. The purge pipe with one end as an insertion end and controllable opening and closing is arranged in the burner assembly. The insertion end of the purge pipe is inserted into the pipe hole of one inlet pipe. The nozzle is in communication with the insertion end inserted into the pipe hole of the inlet pipe. The nozzle is located in the pipe hole of the inlet pipe and the nozzle nozzle is directed to the inlet end of the inlet pipe. When the burner is stopped, the purge pipe can be opened, and the purge gas such as air can enter the purge pipe and flow into the nozzle from the insertion end. The nozzle is directed to the inlet end of the inlet pipe, and the purge gas can flow through the inlet end and the combustion chamber of the burner in a certain pressure in sequence from the nozzle, so as to effectively purge the inlet end and the combustion chamber, reduce the possibility of dust accumulation in the combustion chamber, reduce the frequency of cleaning and maintenance of the burner, ensure the working efficiency of the combustion furnace where the burner is located, and solve the technical problem that the frequent maintenance of the burner affects the working efficiency of the combustion furnace to a certain extent. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The structure of the burner assembly in some embodiments or certain embodiments of the present application is shown.

[0029] Figure 2 The inclined sectional view of the burner assembly in some embodiments or certain embodiments of the present application is shown.

[0030] Figure 3 The structure of the purge pipe in some embodiments or certain embodiments of the present application is shown.

[0031] Figure 4 The structure of the purge pipe and the nozzle in some embodiments or certain embodiments of the present application is shown.

[0032] Explanation of reference numerals: 1, burner body; 11, combustion chamber; 12, injection hole; 13, inlet; 14, acceleration structure; 2, through pipe; 21, through end; 3, purge pipe; 31, insertion end; 311, through hole; 32, air inlet section; 33, insertion section; 4, nozzle; 41, nozzle opening; 42, main body; 421, communication hole; 43, acceleration part; 5, first control valve; 6, second control valve; 7, injection pipe. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, in the present application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0037] In the related art, for a combustion furnace with slightly complex functions such as a hydrogen sulfide combustion furnace, at least two burners need to be provided. Taking the hydrogen sulfide combustion furnace as an example, the hydrogen sulfide combustion furnace has two heating modes, namely, a furnace drying mode and a production mode. In the furnace drying mode, the hydrogen sulfide combustion furnace needs to heat the furnace body of the combustion furnace to above 780 DEG C through the combustion of mixed gas of coal gas and air of one burner; in the production mode, the hydrogen sulfide combustion furnace needs to generate sulfur dioxide and a small amount of sulfur trioxide dust through the combustion of mixed gas of hydrogen sulfide and air of another burner. The two modes of the hydrogen sulfide combustion furnace cannot be performed simultaneously, so the two burners of the hydrogen sulfide combustion furnace usually remain in a state of one being deactivated and the other being activated. In the production mode, the sulfur trioxide dust generated in the hearth of the hydrogen sulfide combustion furnace will deposit in the burner in the deactivated state, causing the burner to be blocked, and the mode cannot be switched normally, the burner needs to be removed as a whole for cleaning, and at the same time, the sulfur trioxide has a corrosive effect on the burner body, which may cause damage to the burner body. The blockage and corrosion damage of the burner need to be maintained and cleaned or repaired, and frequent maintenance of the burner will affect the working efficiency of the combustion furnace, and there is a technical problem that the frequent maintenance of the burner affects the working efficiency of the combustion furnace. The present application provides a burner assembly, which can solve the above technical problems to some extent.

[0038] The present application will be described below in conjunction with the drawings:

[0039] Figure 1 The structure of the burner assembly in some embodiments or certain embodiments of the present application is shown, Figure 2 The oblique sectional view of the burner assembly in some embodiments or certain embodiments of the present application is shown, referring to Figure 1 、 2 The present application provides a burner assembly, comprising:

[0040] The burner body 1 is provided with a combustion chamber 11 and a spray hole 12 communicating with the combustion chamber 11.

[0041] The at least two inlet pipes 2 are controlled to be turned on and off, and each inlet pipe 2 is provided with an inlet end 21 communicating with the combustion chamber 11.

[0042] The purge pipe 3 is controlled to be turned on and off, and one end is configured as an insertion end 31 inserted into a pipe hole of one inlet pipe 2.

[0043] The nozzle 4 communicates with the insertion end 31, and the nozzle 4 has a nozzle opening 41 facing the inlet end 21 of the inlet pipe 2.

[0044] The combustion chamber 11 of the burner body 1 in the burner assembly can provide a space for fuel and air mixing combustion, the injection hole 12 communicating with the combustion chamber 11 can communicate to the combustion furnace to carry the heat of the mixed combustion gas in the combustion chamber 11 to the combustion furnace, and the at least two inlet pipes 2 each having one end communicating with the combustion chamber 11 can be used to deliver fuel and air and the like to the combustion chamber 11 for mixing combustion. The opening and closing of the inlet pipe 2 can be controlled, so that the inlet pipe 2 can be closed after the fuel and air are delivered in place to ensure normal combustion in the combustion chamber 11. The burner assembly also has a purge pipe 3 having one end as an insertion end 31 and being controllable in opening and closing. The insertion end 31 of the purge pipe 3 is inserted into a pipe hole of one inlet pipe 2. The nozzle 4 communicates with the insertion end 31 inserted into the pipe hole of the insertion pipe. The nozzle 4 is also located in the pipe hole of the inlet pipe 2, and the nozzle 4 has a nozzle opening 41 facing the inlet end 21 of the inlet pipe 2. When the burner is stopped, the purge pipe 3 can be opened, so that the purge gas such as air enters the purge pipe 3 and flows from the insertion end 31 into the nozzle 4. The nozzle 4 faces the inlet end 21 of the inlet pipe 2, so that the purge gas can flow through the inlet end 21 and the combustion chamber 11 of the burner in a certain pressure in sequence from the nozzle 4, thereby effectively purging the inlet end 21 and the combustion chamber 11, reducing the possibility of dust accumulation in the combustion chamber 11, reducing the frequency of burner cleaning and maintenance, ensuring the working efficiency of the combustion furnace where the burner is located, and to some extent solving the technical problem of frequent maintenance of the burner affecting the working efficiency of the combustion furnace.

[0045] The insertion end 31 of the purge pipe 3 is inserted into the inlet pipe 2, which is convenient for processing and preparation. The aperture of the inlet pipe 2 is usually smaller than the space of the combustion chamber 11, so that the pressure of the purge gas entering the combustion chamber 11 from the inlet pipe 2 is also a little larger, which can improve the cleaning effect of the purge gas on the combustion chamber 11.

[0046] Figure 3 A structure diagram of a purge pipe in some embodiments or certain embodiments of the application is shown, Figure 4 A structure diagram of a purge pipe and a nozzle in some embodiments or certain embodiments of the application is shown, referring to Figure 3 And Figure 4 In some or certain embodiments, the purge pipe 3 includes a gas inlet section 32 and an insertion section 33 in coaxial communication. The end of the insertion section 33 away from the gas inlet section 32 is configured as the insertion end 31. The aperture of the insertion section 33 is smaller than the aperture of the gas inlet section 32.

[0047] The hole diameter of the insertion section 33 is smaller than the hole diameter of the air inlet section 32. After the purge gas enters the air inlet section 32 of the purge pipe, the purge gas can be accelerated in the insertion section 33 with a reduced hole diameter, so as to increase the speed of the purge gas entering the nozzle 4, and increase the flow rate of the purge gas sprayed from the nozzle 4, so as to improve the purging effect of the purge gas on the combustion chamber 11, improve the cleaning efficiency, effectively reduce the possibility of dust accumulation in the combustion chamber 11, reduce the frequency of maintenance of the burner body 1, and avoid the influence of too many maintenance frequencies of the burner body 1 on the normal operation of the combustion furnace.

[0048] In some or certain embodiments, the longitudinal section of the hole corresponding to the insertion section 33 is in the shape of a sandglass.

[0049] The longitudinal section of the hole corresponding to the insertion section 33 is in the shape of a sandglass, which can accelerate the purge gas while ensuring that the purge gas entering the nozzle 4 has a certain volume, so as to effectively increase the purging and cleaning effect on the combustion chamber 11.

[0050] In some or certain embodiments, the axial opening of the insertion end 31 is closed, and the peripheral wall is provided with a through hole 311, and the two ends of the through hole 311 are respectively communicated with the inner hole of the purge pipe 3 and the nozzle 4.

[0051] The axial opening of the insertion end 31 is closed, and the purge gas entering the purge pipe 3 can enter the nozzle 4 from the through hole 311 of the peripheral wall of the insertion end 31, and then be sprayed from the nozzle 41 of the nozzle 4. This arrangement facilitates the adjustment of the direction of the nozzle 41 of the nozzle 4, so as to ensure that the purge gas stably enters the combustion chamber 11 to play a purging role.

[0052] In some or certain embodiments, the insertion end 31 of the purge pipe 3 can be obliquely inserted into the pipe hole of the through pipe 2, or vertically inserted into the pipe hole of the through pipe 2. The through pipe 2 can also be provided with an insertion hole for inserting the purge pipe 3, and the through pipe 2 and the purge pipe 3 can be welded and fixed after the insertion end 31 of the purge pipe 3 is inserted into the insertion hole. Both can realize the insertion of the insertion end 31 into the through pipe 2.

[0053] In some or certain embodiments, the nozzle 4 can include:

[0054] The main body 42 is provided with a communication hole 421, one end of the communication hole 421 is communicated with the insertion end 31, and the other end of the communication hole 421 is configured as the nozzle 41.

[0055] The acceleration part 43 is in the shape of a fan and is arranged at the nozzle 41.

[0056] The through hole 421 in the main body 42 of the nozzle 4 is communicated with the insertion end 31, and the purge gas can be cut and accelerated by the acceleration part 43 when flowing through the fan-shaped acceleration part 43 at the nozzle 41, so as to improve the flow rate of the purge gas to improve the purging efficiency of the combustion chamber 11, and slightly adjust the outflow direction of the purge gas, promote the contact of the purge gas with the inlet end 21, and improve the purging and cleaning effect on the combustion chamber 11.

[0057] In some or certain embodiments, the nozzle 4 can also be configured to have a smaller caliber than the hole diameter of the purge pipe 3. To a certain extent, the flow rate of the purge gas can also be improved.

[0058] In some or certain embodiments, the hole diameter of the purge pipe 3 is smaller than the hole diameter of each inlet pipe 2, and the burner assembly further comprises:

[0059] At least two first control valves 5 are arranged in the at least two inlet pipes 2 one by one to control the on-off of the corresponding inlet pipe 2.

[0060] The second control valve 6 is arranged in the purge pipe 3 to control the on-off of the purge pipe 3.

[0061] The first control valve 5 and the second control valve 6 can be used to control the on-off of the inlet pipe 2 and the purge pipe 3, respectively.

[0062] In some or certain embodiments, the first control valve 5 and the second control valve 6 can be mechanical valves or electric control valves.

[0063] In some or certain embodiments, the inlet pipe 2 and the burner body 1 can be detachably connected, and the inlet end 21 of the inlet pipe 2 and the burner body 1 can be connected through flanges or joints. Under the premise that the purge pipe 3 comprises the gas inlet section 32 and the insertion section 33, the second control valve 6 can be arranged in the gas inlet section 32. The burner assembly is convenient to process.

[0064] In some or certain embodiments, the burner assembly comprises two inlet pipes 2 with different hole diameters, the inlet pipe 2 with a larger hole diameter is configured as an air pipe, the inlet pipe 2 with a smaller hole diameter is configured as a gas pipe, the purge pipe 3 is arranged on the gas pipe, the inlet end 21 of the air pipe is opposite to the nozzle 12 of the combustion chamber 11, and the inlet end 21 of the gas pipe is located on the same side of the air pipe and the nozzle 12.

[0065] Among the two inlet pipes 2 of the burner assembly, the inlet pipe 2 with a larger hole diameter can be configured as an air pipe for introducing air, and the inlet pipe 2 with a smaller hole diameter can be configured as a gas pipe for introducing gas, so as to facilitate the introduction of gas and combustion air, the purge pipe 3 is arranged on the gas pipe with a smaller hole diameter, the purge gas can enter the gas pipe with a smaller hole diameter, then flow out from the inlet end 21 of the gas pipe under a certain pressure, and finally enter the combustion chamber 11.

[0066] In some or certain embodiments, the combustion chamber 11 is provided with an air communication pipe connected to the inlet 13 of the combustion chamber 11, and the combustion chamber 11 is further provided with an acceleration structure 14 at the inlet 13. The air can be facilitated to enter the combustion chamber 11.

[0067] It should be noted that the acceleration structure 14 can be similar or identical to the acceleration portion 43.

[0068] In some or certain embodiments, the burner assembly further comprises:

[0069] A plurality of nozzles 7, each of which is connected to the combustion chamber 11 at one end and is connected to the burner body 1 at intervals around the injection hole 12, and the aperture of the nozzles 7 is smaller than the aperture of the injection hole 12.

[0070] The nozzles 7 around the injection hole 12 of the combustion chamber 11 and connected to the combustion chamber 11 can also transfer the gas and heat in the combustion chamber 11 to the combustion furnace, improve the heat transfer efficiency of the combustion furnace, and also facilitate uniform heat transfer to the combustion furnace.

[0071] In some or certain embodiments, the burner assembly further comprises:

[0072] A medium supply carrier (not shown in the figure) is provided with a medium supply end (not shown in the figure) connected to the purge pipe 3.

[0073] The medium supply carrier can transport the required medium such as purge gas to the purge pipe 3 through the medium supply end, so as to realize stable transportation of the purge gas and effective purging of the combustion chamber 11.

[0074] It should be noted that the medium supply carrier can be a medium container such as a gas cylinder or a gas tank, and the medium supply end can be the output end of the gas cylinder or the gas tank. The medium carried in the medium supply carrier can be air or inert gas, and air or inert gas can be used to purge the combustion chamber 11.

[0075] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0076] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0077] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. A burner assembly characterized by, The burner assembly comprises: a burner body provided with a combustion chamber and a nozzle hole communicating with the combustion chamber; at least two controllable inlet pipes, each provided with an inlet end communicating with the combustion chamber; a controllable purge pipe, one end of which is configured as an insertion end inserted into a pipe hole of one of the inlet pipes; a nozzle communicating with the insertion end, and a nozzle opening of the nozzle facing the inlet end of the inlet pipe.

2. The burner assembly of claim 1, wherein, The purge pipe comprises a coaxially communicating gas inlet section and an insertion section, one end of the insertion section away from the gas inlet section is configured as an insertion end, and a hole diameter of the insertion section is smaller than that of the gas inlet section.

3. The burner assembly of claim 2, wherein, A longitudinal section of the hole of the insertion section is in the shape of a sandglass.

4. The burner assembly of any of claims 1-3, wherein An axial opening of the insertion end is closed, and a peripheral wall of the insertion end is provided with a through hole, two ends of the through hole respectively communicating with an inner hole of the purge pipe and the nozzle opening of the nozzle.

5. The burner assembly of any one of claims 1-3, wherein The nozzle comprises: a main body provided with a communicating hole, one end of the communicating hole communicating with the insertion end, and the other end of the communicating hole being configured as the nozzle opening; an acceleration part in the shape of a fan and arranged at the nozzle opening.

6. The burner assembly of any one of claims 1-3, wherein The hole diameter of the purge pipe is smaller than the hole diameter of each of the inlet pipes, and the burner assembly further comprises: at least two first control valves, each corresponding to one of the inlet pipes, for controlling the on-off of the corresponding inlet pipe; a second control valve arranged at the purge pipe for controlling the on-off of the purge pipe.

7. The burner assembly of any of claims 1-3, wherein The burner assembly comprises two inlet pipes with different hole diameters, the inlet pipe with a larger hole diameter is configured as an air pipe, and the inlet pipe with a smaller hole diameter is configured as a gas pipe, the purge pipe is arranged at the gas pipe, the inlet end of the air pipe is opposite to the nozzle hole of the combustion chamber, and the inlet end of the gas pipe is located at the same side of the air pipe and the nozzle hole.

8. The burner assembly of claim 7, wherein, The combustion chamber is provided with an inlet communicating the air pipe and the combustion chamber, and the combustion chamber is further provided with an acceleration structure at the inlet.

9. The burner assembly of any of claims 1-3, wherein The burner assembly further comprises: a plurality of injection pipes, each of which is connected to the combustion chamber at one end and is connected to the burner body at intervals around the nozzle hole, and the hole diameter of each of the injection pipes is smaller than the hole diameter of the nozzle hole.

10. The burner assembly of any one of claims 1-3, wherein The burner assembly further comprises: a medium supply carrier provided with a medium supply end communicating with the purge pipe.

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