A burner adaptable to various gas fuels

Abstract

The present invention discloses a burner adaptable to a variety of gas fuels, and relates to the technical field of heating equipment; the technical scheme includes a shell and a gas supply pipe, the two ends of the shell are respectively provided with an air intake chamber and a combustion chamber, the air intake chamber is provided with a fuel gas interface, and the two ends of the gas supply pipe are respectively provided with a gas interface and a nozzle cavity; one end of the gas supply pipe provided with the nozzle cavity is located in the shell, and the nozzle cavity is connected to the combustion chamber; the nozzle cavity is used to accommodate a gas nozzle, and a gas flow channel is provided between the gas nozzle and the side wall of the nozzle cavity, and the effective flow area of ​​the gas flow channel is adjustable. The burner provided by the present invention has an adjustable effective flow area of ​​the gas flow channel between the gas nozzle and the side wall of the nozzle cavity, and the flow rate or speed of the gas spray can be dynamically adjusted so that the same burner can meet the requirements of burning different fuels.

Description

Technical Field

[0001] The invention relates to the technical field of heating equipment, and in particular to a burner capable of adapting to a variety of gas fuels. Background Art

[0002] There are many types of existing high-temperature furnace gas fuels, including high-calorific value natural gas and low-calorific value artificial coal gas. At the same time, with the implementation of carbon peak and carbon neutrality policies, high-calorific value hydrogen fuel is also used as high-temperature furnace fuel. However, the calorific value of different fuels is different. For the same burner power, the fuel flow rate is different, and the performance of different fuels is different (the inventors have found that since hydrogen fuel burns very quickly and is prone to tempering, increasing the nozzle ejection speed can avoid hydrogen fuel tempering), and different ejection speeds are also required. Therefore, existing burners are difficult to adapt to fuels of different calorific values, and each calorific value of fuel needs to be equipped with a dedicated burner. Summary of the invention

[0003] Aiming at the technical problem that the existing burners are difficult to adapt to fuels with different calorific values ​​and each fuel with each calorific value needs to be equipped with a dedicated burner; the present invention provides a burner that can adapt to a variety of gas fuels and can meet the requirements of burning different fuels.

[0004] In order to maintain a good nozzle ejection velocity, it may be necessary to properly adjust the nozzle channel area.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention provides a burner that can adapt to a variety of gas fuels, including a shell and a gas supply pipe, wherein an air intake chamber and a combustion chamber are respectively provided at two ends of the shell, the air intake chamber is provided with a fuel gas interface, and a gas interface and a nozzle cavity are respectively provided at two ends of the gas supply pipe; one end of the gas supply pipe where the nozzle cavity is provided is located in the shell, and the nozzle cavity is connected to the combustion chamber; the nozzle cavity is used to accommodate a gas nozzle, and a gas flow channel is provided between the gas nozzle and the side wall of the nozzle cavity, and the effective flow area of ​​the gas flow channel is adjustable.

[0007] In an optional embodiment, it includes an adjusting rod and a linear drive assembly, one end of the adjusting rod is connected to the gas nozzle; the linear drive assembly is used to drive the adjusting rod to move axially along the shell, and the effective flow area of ​​the gas flow channel is adjusted by the movement of the adjusting rod.

[0008] In an optional embodiment, one end of the gas supply pipe where the gas interface is provided, the linear drive assembly, and one end of the adjusting rod that is transmission-connected to the linear drive assembly are all located outside the shell; an expansion joint is provided between the linear drive assembly and the adjusting rod, and the expansion joint is used to seal the gap between the adjusting rod and the gas supply pipe.

[0009] In an optional embodiment, the linear drive assembly includes a connecting block and a linear driver, the connecting block is sealingly sleeved outside the adjusting rod, and the connecting block is fixedly connected to the driving end of the linear driver; the telescopic joint is sleeved outside the adjusting rod, and one end of the telescopic joint is sealingly connected to the connecting block, and the other end of the telescopic joint is sealingly connected to the gas supply pipe.

[0010] In an optional embodiment, the linear drive assembly includes a guide rod extending in the length direction of the supply tube, and the connecting block is slidably sleeved outside the guide rod.

[0011] In an optional embodiment, an ignition gas channel is provided in the middle of the adjusting rod, the adjusting rod is provided with an ignition gas interface, the ignition gas channel extends along the length direction of the adjusting rod, and the ignition gas channel is connected to the combustion chamber.

[0012] In an optional embodiment, the ignition gas interface is located outside the gas supply pipe.

[0013] In an optional embodiment, it includes an ignition rod and a grounding electrode, wherein the ignition rod is insulated and arranged in the ignition gas channel, and the grounding electrode is arranged at one end of the adjustment rod connected to the gas nozzle.

[0014] In an optional embodiment, the nozzle chamber is connected to the air inlet chamber through a premixing channel.

[0015] In an optional embodiment, a swirl vane is provided on the outer periphery of one end of the gas supply pipe located in the combustion chamber.

[0016] The present invention has the beneficial effects:

[0017] The burner provided by the present invention can adapt to a variety of gas fuels. One end of the gas supply pipe with a nozzle cavity is located in the shell, the nozzle cavity provided by the gas supply pipe is connected to the combustion chamber, and the effective flow area of ​​the gas flow channel between the gas nozzle and the side wall of the nozzle cavity is adjustable. The gas ejection flow rate and speed can be adjusted according to the calorific value of the gas, so that the same burner can meet the requirements of combustion of different fuels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1This is a schematic diagram of the structure of the burner according to an embodiment of the present invention when using a low calorific value fuel;

[0020] Figure 2 This is a schematic diagram of the structure of the burner according to an embodiment of the present invention when using high calorific value fuel.

[0021] Reference numerals:

[0022] 1-shell, 11-air inlet chamber, 12-combustion chamber, 13-fuel gas interface, 2-gas supply pipe, 21-gas interface, 22-nozzle cavity, 23-gas flow channel, 24-premixing channel, 3-gas nozzle, 4-adjusting rod, 41-ignition gas channel, 42-ignition gas interface, 5-linear drive assembly, 51-linear drive, 52-connecting block, 53-guide rod, 6-expansion joint, 7-ignition rod, 8-grounding electrode, 9-swirl sheet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present application, the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0029] Example 1

[0030] Combined with Figure 1 The present embodiment provides a burner that can adapt to a variety of gas fuels, including a shell 1 and a gas supply pipe 2, wherein the shell 1 is provided with an air inlet chamber 11 and a combustion chamber 12 at both ends, the air inlet chamber 11 is provided with a fuel gas interface 13, and the gas supply pipe 2 is provided with a gas interface 21 and a nozzle cavity 22 at both ends; one end of the gas supply pipe 2 where the nozzle cavity 22 is provided is located in the shell 1, and the nozzle cavity 22 is connected to the combustion chamber 12; the nozzle cavity 22 is used to accommodate a gas nozzle 3, and a gas flow channel 23 is provided between the gas nozzle 3 and the side wall of the nozzle cavity 22, and the effective flow area of ​​the gas flow channel 23 is adjustable.

[0031] It is understandable that there are many implementation methods for adjusting the effective flow area of ​​the gas flow channel 23. The gap between the gas nozzle 3 and the side wall of the nozzle cavity 22 can be changed by relatively moving the gas nozzle 3 and the gas supply pipe 2, such as by driving the gas nozzle 3 to move axially along the gas supply pipe 2 by the linear drive 51, or by driving the gas supply pipe 2 to move axially along itself. The effective flow area of ​​the gas flow channel 23 can also be changed by changing the amount of filler between the gas nozzle 3 and the side wall of the nozzle cavity 22, such as by driving the filler to fill the gas flow channel 23 by the linear drive 51.

[0032] In order to reduce the leakage of the gas and the combustion-supporting gas, the present embodiment uses a linear drive assembly 5 to drive the gas nozzle 3 to move to adjust the effective flow area of ​​the gas flow channel 23. Specifically, the present embodiment includes an adjustment rod 4 and a linear drive assembly 5, one end of the adjustment rod 4 is connected to the gas nozzle 3; the linear drive assembly 5 is used to drive the adjustment rod 4 to move axially along the housing 1, and the effective flow area of ​​the gas flow channel 23 is adjusted by the movement of the adjustment rod 4.

[0033] In order to prevent the combustion of gas from affecting the linear drive assembly 5, one end of the gas supply pipe 2 where the gas interface 21 is provided, the linear drive assembly 5, and one end of the adjusting rod 4 that is transmission-connected to the linear drive assembly 5 are all located outside the housing 1; a telescopic joint 6 is provided between the linear drive assembly 5 and the adjusting rod 4, and the telescopic joint 6 is used to seal the gap between the adjusting rod 4 and the gas supply pipe 2. For the telescopic joint 6, a corrugated pipe or other flexible pipes, such as a rubber pipe, a flexible wire-reinforced cloth pipe, etc., are generally used.

[0034] Specifically, the linear drive assembly 5 includes a connecting block 52 and a linear driver 51, the connecting block 52 is sealingly sleeved on the outside of the adjusting rod 4, and the connecting block 52 is fixedly connected to the driving end of the linear driver 51; the telescopic joint 6 is sleeved on the outside of the adjusting rod 4, and one end of the telescopic joint 6 is sealingly connected to the connecting block 52, and the other end of the telescopic joint 6 is sealingly connected to the gas supply pipe 2.

[0035] The linear drive 51 may be a linear drive component or mechanism, such as a hydraulic cylinder, an electric push rod, a pneumatic cylinder, or a screw slider mechanism driven by a rotary drive, a gear rack mechanism, etc. In this embodiment, to ensure the reliability of the linear drive 51, a hydraulic cylinder is used to drive the connecting block 52 to move.

[0036] In order to ensure the stability of the movement of the adjustment rod 4 , the linear drive assembly 5 includes a guide rod 53 , which extends along the length direction of the gas supply pipe 2 , and the connecting block 52 is slidably sleeved outside the guide rod 53 .

[0037] In addition, in order to ensure the linearity of the flow area adjustment of the gas flow channel 23, the lower end surface of the gas nozzle 3 facing the nozzle cavity 22 is parallel to the bottom surface of the nozzle cavity 22, and both are inclined surfaces.

[0038] Continue to combine Figure 1 Furthermore, an ignition gas channel 41 is provided in the middle of the adjusting rod 4, and an ignition gas interface 42 is provided in the adjusting rod 4. The ignition gas channel 41 extends along the length direction of the adjusting rod 4, and the ignition gas channel 41 is connected to the combustion chamber 12. On the one hand, the ignition gas can be directly introduced into the combustion chamber 12 for ignition, and on the other hand, the adjustment can be cooled by the continuous supply of ignition gas, so that the flame temperature can be observed through the adjusting rod 4.

[0039] In order to facilitate the input of ignition gas into the ignition gas channel 41 in the adjusting rod 4 , the ignition gas interface 42 is located outside the gas supply pipe 2 .

[0040] It should be understood that the burner provided in this embodiment includes an ignition rod 7 and a grounding electrode 8, wherein the ignition rod 7 is insulated and arranged in the ignition gas channel 41, and the grounding electrode 8 is arranged at one end of the adjustment rod 4 connected to the gas nozzle 3. Usually, the grounding electrode 8 is welded to the end surface of the gas nozzle 3.

[0041] It should be noted that the ignition rod 7 is arranged in the ignition gas channel 41, and the ignition rod 7 can also be cooled by the ignition gas, so that the ignition rod 7 can be used as an ion to directly monitor the flame through the ignition rod 7, realizing the integrated design of the ignition rod 7 and the ion rod.

[0042] In addition, in this embodiment, the linear drive 51 is connected to the connecting block 52 by hard connection, the connecting block 52 is welded to the adjusting rod 4, one end of the adjusting rod 4 is directly connected to the gas nozzle 3, and the ignition rod 7 is directly installed on the adjusting rod 4 by thread. Of course, other connection methods can also be used, as long as the linear drive 51 can drive the gas nozzle 3 to move axially along the gas supply pipe 2 through the adjusting rod 4.

[0043] The burner provided in this embodiment, when igniting, connects a set amount of ignition gas (usually air) to the igniter channel through the ignition gas interface 42, which can cool the ignition rod 7 on the one hand, and serve as the combustion-supporting gas required for ignition on the other hand. When the ignition system receives the ignition command, the system inputs an ignition voltage (usually 6-8KV) to the ignition rod 7, so that an electric spark is formed between the ignition rod 7 and the grounding electrode 8. At the same time, a part of the fuel gas is sent into the fuel gas supply pipe 2 through the fuel gas interface 21, and is ejected from a circle of fuel gas nozzles near the regulating rod 4 on the end face of the fuel gas nozzle 3, and is mixed with the ignition gas coming out of the regulating rod 4 and ignited by the spark, forming an ignition flame, and then a large amount of fuel gas and combustion-supporting gas mixture that enters later is ignited in the combustion chamber 12.

[0044] If the flame signal obtained from the ignition rod 7 is stable, the system immediately enters the temperature control mode. Since the ignition gas and the gas ejected from the gas nozzle 3 near the end surface of the gas nozzle 3 near the adjusting rod 4 are always present during operation, the flame near the end of the ignition rod 7 in the center of the burner is always present during operation. As the long-lasting flame in the center of the burner, after ignition, the extended part at the end of the ignition rod 7 acts as an ion rod to continuously monitor the center flame to ensure safe and continuous operation of the system.

[0045] When burning low calorific value fuel, the linear drive 51 is in a non-working state, and the telescopic joint 6 at the rear of the burner is in a natural length state. When the system needs to work, the gas enters the gas supply pipe 2 from the gas interface 21, and then is ejected through the gas flow channel 23 and the gas nozzle on the gas nozzle 3; the auxiliary gas (usually air or oxygen-rich gas) enters the air inlet chamber 11 from the auxiliary gas interface 13, and then burns in the combustion chamber 12.

[0046] When burning low calorific value and high calorific value fuels, the linear actuator 51 is in working state, that is, the moving end of the linear actuator 51 moves outward away from the gas supply pipe 2. At this time, the connecting block 52 moves along the guide stem away from the gas supply pipe 2, thereby driving the adjustment rod 4, the gas nozzle 3 and the ignition rod 7 to move. The moving distance is determined by the size of the gas flow channel 23 required for the corresponding fuel during design. If the calorific value is very high or the gas is prone to backfire, the gas flow channel 23 can be completely sealed by controlling the linear actuator 51 (such as Figure 2 As shown), all the fuel is sprayed out from the gas nozzle on the gas nozzle 3.

[0047] In summary, this embodiment can cover the effective flow surface of the gas flow channel 23 between the gas nozzle 3 and the side wall of the nozzle cavity 22, thereby changing the gas injection speed to adapt to the different injection speed requirements of fuels with different calorific values ​​or different properties at the combustion nozzle.

[0048] At the same time, the ignition rod 7 is placed in the center of the gas nozzle 3. The ignition gas can be used as ignition gas, cooling airflow for the ignition rod 7, and can also be used as a combustion-supporting gas for the center long-burning flame when the burner is working normally, ensuring that a stable long-burning flame is formed near the center outlet of the gas nozzle during the operation of the burner, and also facilitating the integrated design of the ignition rod 7 and the ion rod (that is, the ignition rod 7 is also used as an ion rod).

[0049] Example 2

[0050] The present embodiment provides a burner that can adapt to a variety of gas fuels. Based on the structure and principle described in Example 1, the nozzle chamber 22 is connected to the air inlet chamber 11 through a premixing channel 24, so that when the gas is burning, a small portion of the supporting combustion gas can be sprayed into the nozzle chamber 22 through the premixing channel 24 on the gas supply pipe 2 to be premixed with the gas, thereby improving the stability of the flame.

[0051] Example 3

[0052] This embodiment provides a burner that can adapt to a variety of gas fuels. Based on the structure and principle described in Embodiment 1 or Embodiment 2, a swirl plate 9 is provided on the outer periphery of one end of the gas supply pipe 2 located in the combustion chamber 12 so that the auxiliary gas and the fuel gas can be fully mixed through the swirl plate 9.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A burner that can adapt to a variety of gas fuels, comprising a shell (1) and a gas supply pipe (2), wherein the shell (1) is provided with an air inlet chamber (11) and a combustion chamber (12) at both ends, and the air inlet chamber (11) is provided with a combustion-supporting gas interface (13), characterized in that: The two ends of the gas supply pipe (2) are respectively provided with a gas interface (21) and a nozzle cavity (22); One end of the gas supply pipe (2) having a nozzle cavity (22) is located inside the shell (1), and the nozzle cavity (22) is connected to the combustion chamber (12); the nozzle cavity (22) is used to accommodate a gas nozzle (3), and a gas flow channel (23) is provided between the gas nozzle (3) and a side wall of the nozzle cavity (22), and the effective flow area of ​​the gas flow channel (23) is adjustable; It comprises an adjusting rod (4) and a linear drive assembly (5), wherein one end of the adjusting rod (4) is connected to the gas nozzle (3); The linear drive assembly (5) is used to drive the adjustment rod (4) to move axially along the housing (1), and to adjust the effective flow area of ​​the gas flow channel (23) through the movement of the adjustment rod (4); One end of the gas supply pipe (2) provided with a gas interface (21), the linear drive assembly (5), and one end of the regulating rod (4) drivingly connected to the linear drive assembly (5) are all located outside the housing (1); A telescopic joint (6) is provided between the linear drive assembly (5) and the regulating rod (4), and the telescopic joint (6) is used to seal the gap between the regulating rod (4) and the gas supply pipe (2); An ignition gas channel (41) is provided in the middle of the adjusting rod (4), and an ignition gas interface (42) is provided in the adjusting rod (4). The ignition gas channel (41) extends along the length direction of the adjusting rod (4), and the ignition gas channel (41) is in communication with the combustion chamber (12); It also includes an ignition rod (7) and a grounding electrode (8), wherein the ignition rod (7) is insulated and arranged in the ignition gas channel (41), and the grounding electrode (8) is arranged at one end of the regulating rod (4) connected to the gas nozzle (3); The linear drive assembly (5) comprises a connecting block (52) and a linear drive (51), wherein the connecting block (52) is sealingly sleeved outside the adjusting rod (4), and the connecting block (52) is fixedly connected to a driving end of the linear drive (51); The telescopic joint (6) is sleeved outside the adjusting rod (4), and one end of the telescopic joint (6) is sealedly connected to the connecting block (52), and the other end of the telescopic joint (6) is sealedly connected to the gas supply pipe (2); The linear drive assembly (5) comprises a guide rod (53), the guide rod (53) extending along the length direction of the gas supply pipe (2), and the connection block (52) being slidably sleeved outside the guide rod (53).

2. The burner adaptable to multiple gas fuels according to claim 1, characterized in that: The ignition gas interface (42) is located outside the gas supply pipe (2).

3. The burner capable of adapting to multiple gas fuels according to any one of claims 1 to 2, characterized in that: The nozzle chamber (22) is in communication with the air inlet chamber (11) via a premixing channel (24).

4. The burner adaptable to multiple gas fuels according to claim 1, characterized in that: A swirl sheet (9) is provided on the outer periphery of one end of the gas supply pipe (2) located in the combustion chamber (12).

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