A side wall burner adapted to multiple fuels and multiple combustion modes

Abstract

The application provides a side wall burner suitable for multiple fuels and multiple combustion modes, which comprises a hydrogen gun, a fuel gas center gun and the like; fuel gas enters the burner through a fuel gas inlet pipeline of the fuel gas center gun, is ejected through a nozzle, and is injected with part of fuel gas combustion air, the fuel gas and the injected fuel gas combustion air are mixed in an injector, the mixed gas is ejected through an opening on an inner ring of a nested burner head, and premixed or partially premixed combustion is realized; the hydrogen gun is installed in a hydrogen combustion air chamber and is connected with an outer ring of the nested burner head, the outer ring of the nested burner head is radially provided with an opening for ejecting hydrogen, and diffusion combustion is realized; the hydrogen combustion air is ejected along an axial direction through an opening on a hydrogen combustion air supply plate, and is mixed with the hydrogen ejected radially from the outer ring of the nested burner head for mixed combustion. The application realizes stable combustion states of premixed combustion and diffusion combustion for fuel gas with different properties.

Description

TECHNICAL FIELD

[0001] The present application relates to a side wall burner, belonging to the field of burners. BACKGROUND

[0002] Hydrogen energy has many advantages, and is currently attracting global attention. It is also known as the most potential energy in the 21st century, and has developed well in the world in recent years. Under the "double carbon" goal, economic and energy transformation is imperative, and hydrogen energy development has become a hot topic, attracting the attention of governments and relevant enterprises at all levels.

[0003] For chemical companies that can produce hydrogen as a byproduct, hydrogen is one of the main uses of hydrogen as fuel for industrial furnaces and other equipment. However, for industrial furnaces that use natural gas and other carbon-hydrogen fuels as fuel, the combustion properties of carbon-hydrogen fuel gas and hydrogen are very different. Industrial furnaces need to be equipped with new burners suitable for both fuels. Carbon-hydrogen fuel gas usually uses premixed or partially premixed combustion, while hydrogen is prone to backfire due to its high mass heat value, high laminar flame speed, low ignition delay, and high adiabatic flame temperature. Therefore, hydrogen usually uses diffusion combustion. The commonly used mixed combustion burner is a separate set of hydrogen lances added around the natural gas burner, which is equivalent to a mechanical combination of two burners, with complex structure and poor adjustability. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a side wall burner that can adapt to multiple fuels and multiple combustion modes, and achieve stable premixed and diffusion combustion states for different fuel gases under the premise of meeting process requirements.

[0005] The technical solution adopted by the present application is: a side wall burner that can adapt to multiple fuels and multiple combustion modes, comprising: a hydrogen lance, a fuel gas center lance, a primary air door and its adjusting structure, a fuel gas combustion air chamber, a secondary air door, an ejector, a hydrogen combustion air chamber, a hydrogen ignition electrode, a hydrogen combustion air supply plate, a nested burner head outer ring, a nested burner head inner ring, and a natural gas ignition rod.

[0006] One end of the fuel gas combustion chamber extends into the hydrogen combustion chamber from one end face and connects to the outer ring of the nested burner head. Hydrogen combustion air is introduced into the hydrogen combustion chamber. A hydrogen combustion air supply plate is located at the other end of the hydrogen combustion chamber. The outer ring of the nested burner head is installed at the center of the hydrogen combustion air supply plate and is coaxial with it. A primary air damper and its adjustment structure are installed on the fuel gas center gun to control the primary air volume. An inner ring of the nested burner head is installed at the center hole of the outer ring of the nested burner head, and the inner ring has radial openings. One end of the ejector is connected to the secondary air damper, and the other end is installed in the center hole at the other end face of the outer ring of the nested burner head. The secondary air damper controls the opening of the secondary air duct. A hydrogen ignition electrode is installed outside the hydrogen combustion chamber, and a fuel gas ignition rod is installed inside the hydrogen combustion chamber.

[0007] The fuel gas center gun includes a fuel gas inlet pipe and a nozzle; the fuel gas enters the burner through the fuel gas inlet pipe of the fuel gas center gun, and after being ejected from the nozzle, a portion of the fuel gas combustion air is induced. The fuel gas and the induced fuel gas combustion air enter the ejector and mix. The mixed gas is ejected through the opening on the inner ring of the nested burner head to achieve premixed or partially premixed combustion.

[0008] The hydrogen gun is installed in the hydrogen combustion chamber and connected to the outer ring of the nested burner head. The outer ring of the nested burner head has radial openings to allow hydrogen to be sprayed out, thus achieving diffusion combustion.

[0009] Hydrogen-assisted combustion air is ejected axially through openings in the hydrogen-assisted combustion air supply plate, and intersects perpendicularly with the hydrogen ejected radially from the outer ring of the nested burner head, thus mixing and burning.

[0010] Furthermore, the primary air damper and its adjustment structure are fitted onto the fuel gas center gun and arranged coaxially with it. The primary air damper and its adjustment structure are installed at one end of the fuel gas combustion chamber, and are coaxial with it. The primary air damper and its adjustment structure include an adjustment rod and a circular primary air damper. The primary air damper is located at one end of the adjustment rod, and an adjustment handle is located at the other end of the adjustment rod. The internal thread of the adjustment rod engages with the external thread of the fuel gas center gun. The primary air damper is located inside the fuel gas combustion chamber and moves longitudinally along the fuel gas combustion chamber through the adjustment mechanism. The channel between the primary air damper and the ejector inlet is the primary air flow channel. When the adjustment handle is rotated, the adjustment rod drives the primary air damper to move along the axial direction, causing the primary air flow area to change. The adjustment handle is located outside the fuel gas combustion chamber, and the position of the primary air damper is determined by observing the position of the adjustment handle.

[0011] Furthermore, the ejector is an ejector with a diffusion section.

[0012] Further, the secondary air door comprises a secondary air door movable end and a secondary air door fixed end; the secondary air door movable end is coaxial with the fuel gas combustion air chamber and can move along the longitudinal direction of the fuel gas combustion air chamber; the secondary air door fixed end is located inside the fuel gas combustion air chamber and cooperates with the secondary air door movable end to control the opening degree of the secondary air passage; an opening is arranged on the side wall of the cylinder of the fuel gas combustion air chamber, and an external thread is arranged at the opening; a protruding structure with an internal thread is arranged on the side surface of the secondary air door movable end and extends out of the fuel gas combustion air chamber from the opening; the internal thread on the secondary air door movable end is connected with the external thread on the cylinder of the fuel gas combustion air chamber; one end surface of the secondary air door movable end is a bevel surface; the secondary air door fixed end is a sleeve structure, and an arc-shaped raised structure is arranged in the middle of the outer wall; when the secondary air door movable end moves forward and backward along the axial direction, the flow passage area between the bevel surface of the secondary air door movable end and the arc-shaped raised structure of the secondary air door fixed end changes, thereby realizing the control of the secondary air flow.

[0013] Further, the annular gas passage is arranged near the side wall in the outer ring of the nested burner head, a plurality of radial through holes which are in communication with the annular gas passage are uniformly distributed on the side wall of the outer ring of the nested burner head, the hydrogen gun is in communication with the annular gas passage in the outer ring of the nested burner head, and a hydrogen flow passage is formed; the openings of the outer ring of the nested burner head and the inner ring of the nested burner head are radial multi-row holes, and the opening arrangement mode and the opening area are adjusted according to the fuel gas; the center hole of the outer ring of the nested burner head is provided with internal threads on both sides and is connected with the inner ring of the nested burner head and the ejector, respectively; a plurality of fan-shaped grooves are arranged on the outer side of the center hole in the circumferential direction and are used as a secondary air passage for the fuel gas center gun.

[0014] Further, the outer ring of the nested burner head, the inner ring of the nested burner head and the ejector are fixed to the inner walls of the fuel gas combustion air chamber and the hydrogen combustion air chamber through the fixing plate.

[0015] Further, the nozzle of the fuel gas center gun has an ejecting effect, and the primary air coefficient is adjusted in the range of 0-0.9 under the action of the primary air door and the adjusting structure.

[0016] Further, the side wall burner which is suitable for multiple fuels and multiple combustion modes further comprises a detachable flame stabilizing ring, the detachable flame stabilizing ring is fixed to the end of the outer ring of the nested burner head in a buckle type structure, and whether to use the detachable flame stabilizing ring is determined according to the load and the combustion state of the fuel gas.

[0017] Further, the hydrogen combustion air supply plate is uniformly holed along the circumference of the outer ring mounting hole of the nested burner head to supply the hydrogen combustion air flow; the center axes of the holes on the hydrogen combustion air supply plate along the circumference of the outer ring mounting hole of the nested burner head and the center axes of the radial through holes of the outer ring of the nested burner head are 90° and one-to-one corresponding.

[0018] Further, the side wall burner suitable for multiple fuels and multiple combustion modes further comprises a hydrogen supply pipeline and a fuel gas supply pipeline; one end of the hydrogen supply pipeline is connected with the hydrogen combustion-supporting pipeline, and the other end of the hydrogen supply pipeline is connected with the hydrogen combustion-supporting chamber; the fuel gas supply pipeline is arranged on the side wall of the fuel gas combustion-supporting chamber.

[0019] Compared with the prior art, the application has the following advantages:

[0020] (1) The application designs a new type of burner, when combustible gases with different combustion properties are used as fuel gas, the combustible gases are respectively introduced into the outer ring and the inner ring of the nested burner head through adjusting the ratio of primary air and secondary air, so that the diffusive combustion and the premixed combustion are simultaneously and stably combusted.

[0021] (2) The application can adapt to different fuels with large property differences, and has a simple structure and a large adjustment range. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a structural diagram of the new type of burner;

[0023] Figure 2 Fig. 2 is an opening diagram of the inner and outer rings of the nested burner head and the air supply plate;

[0024] Figure 3 Fig. 3 is a schematic diagram of the position relationship between the detachable flame stabilizing ring and the outer ring of the nested burner head.

[0025] In the figure, 1 is a hydrogen supply pipeline, 2 is a hydrogen pipeline and a hydrogen gun, 3 is a fuel gas center gun, 4 is a primary air door and an adjustment structure thereof, 5 is a fuel gas combustion-supporting chamber, 6 is a fuel gas supply pipeline, 7 is a movable end of a secondary air door, 8 is a fixed end of the secondary air door, 9 is an ejector, 10 is a hydrogen combustion-supporting chamber, 11 is a hydrogen ignition electrode, 12 is a burner mounting flange, 13 is a fixed plate, 14 is a hydrogen combustion-supporting air supply plate, 15 is a detachable flame stabilizing ring, 16 is an outer ring of the nested burner head, 17 is an inner ring of the nested burner head, and 18 is a fuel gas ignition rod. DETAILED DESCRIPTION

[0026] The application will be described in combination with the drawings.

[0027] As Figure 1As shown, a side wall burner suitable for multiple fuels and multiple combustion modes includes a hydrogen supply pipeline 1, a hydrogen pipeline and hydrogen gun 2, a fuel gas center gun 3, a primary air door and its adjusting structure 4, a fuel gas combustion air chamber 5, a fuel gas supply pipeline 6, a secondary air door movable end 7, a secondary air door fixed end 8, an ejector 9, a hydrogen combustion air chamber 10, a hydrogen ignition electrode 11, a burner mounting flange 12, a fixed plate 13, a hydrogen combustion air supply plate 14, a detachable flame stabilizing ring 15, a nested burner tip outer ring 16, a nested burner tip inner ring 17, and a natural gas ignition rod 18.

[0028] One end of the hydrogen supply pipeline 1 is connected to the hydrogen combustion air pipeline, and the other end of the hydrogen supply pipeline 1 is connected to the hydrogen combustion air chamber 10;

[0029] The hydrogen gun 2 and the fuel gas combustion air chamber 5 pass through the end face of one end of the hydrogen combustion air chamber 10, and the hydrogen pipeline and the hydrogen gun 2 are sealingly connected with the nested burner tip outer ring 16; the fuel gas combustion air chamber 5 is connected with the nested burner tip outer ring 16;

[0030] The hydrogen combustion air supply plate 14 is located at the other end of the hydrogen combustion air chamber 10, the nested burner tip outer ring 16 is installed at the center of the hydrogen combustion air supply plate 14 and is coaxial with the hydrogen combustion air supply plate 14, and the hydrogen combustion air supply plate 14 is uniformly holed around the center to allow the combustion air to flow through;

[0031] The primary air door and its adjusting structure 4 are coaxially arranged on the fuel gas center gun 3, the primary air door and its adjusting structure 4 are installed at one end of the fuel gas combustion air chamber 5, the adjusting structure is located outside the fuel gas combustion air chamber 5, the primary air door is located inside the fuel gas combustion air chamber 5, the primary air door and its adjusting structure 4 are coaxial with the fuel gas combustion air chamber 5, the fuel gas center gun 3 includes a fuel gas inlet pipeline and a nozzle, and the fuel gas supply pipeline 6 is arranged on the side wall of the fuel gas combustion air chamber 5;

[0032] The secondary air door movable end 7 is coaxial with the fuel gas combustion air chamber 5, and the secondary air door movable end 7 can move along the longitudinal direction of the fuel gas combustion air chamber 5; the secondary air door fixed end 8 is located inside the fuel gas combustion air chamber 5 and cooperates with the secondary air door movable end 7 to control the opening degree of the secondary air passage;

[0033] The nested burner tip inner ring 17 is installed at the center hole of the nested burner tip outer ring 16, the nested burner tip inner ring 17 is holed along the radial direction, and the detachable flame stabilizing ring 15 is nested on the outer edge of one end of the nested burner tip outer ring 16;

[0034] One end of the ejector 9 is connected with the secondary air door fixed end 8, the other end is installed in the center hole of the end face of the other end of the nested burner tip outer ring 16, and the ejector 9 is fixed inside the fuel gas combustion air chamber 5 through the fixed plate 13;

[0035] The hydrogen ignition electrode 11 is installed on the burner mounting flange 12, and the fuel gas ignition rod 18 is installed in the hydrogen combustion air chamber 10, and the hydrogen ignition electrode 11 and the fuel gas ignition rod 18 are used for ignition;

[0036] The primary air door and its adjusting structure 4 include an adjusting rod and a circular primary air door, the primary air door is arranged at one end of the adjusting rod, an adjusting handle is arranged at the other end of the adjusting rod, the inner thread of the adjusting rod is matched with the outer thread of the fuel gas central gun 3, the passage between the primary air door and the inlet of the ejector 9 is a primary air flow passage, when the adjusting handle is rotated, the adjusting rod drives the primary air door to move along the axial direction, so that the primary air flow area changes, thereby controlling the size of the primary air flow; the adjusting handle is arranged outside the fuel gas combustion air chamber 5, and the position of the adjusting handle is observed to determine the position of the primary air door.

[0037] The ejector 9 is a diffuser section ejector, which can realize sufficient mixing of the fuel gas and the primary air.

[0038] An opening is arranged on the side wall of the cylinder body of the fuel gas combustion air chamber 5, the opening is provided with an outer thread, the protruding structure with an inner thread arranged on the side of the movable end 7 of the secondary air door extends out of the fuel gas combustion air chamber 5 from the opening, the inner thread on the movable end 7 of the secondary air door is matched and connected with the outer thread on the cylinder body of the fuel gas combustion air chamber 5, one end surface of the movable end 7 of the secondary air door is a bevel surface, the fixed end 8 of the secondary air door is a sleeve structure, an arc-shaped raised structure is arranged in the middle of the outer wall, when the movable end 7 of the secondary air door moves forward and backward along the axial direction, the flow passage area between the bevel surface of the movable end 7 of the secondary air door and the arc-shaped raised structure of the fixed end 8 of the secondary air door changes, thereby realizing control of the secondary air flow.

[0039] The nested burner head outer ring 16 and the nested burner head inner ring 17 are threadedly connected, which is convenient for disassembly, the opening forms of the nested burner head outer ring 16 and the nested burner head inner ring 17 are both radial multiple-row holes, and the opening arrangement mode and the opening area can be adjusted according to the form of the fuel gas.

[0040] The nested burner head outer ring 16, the nested burner head inner ring 17 and the ejector 9 are fixed to the inner walls of the fuel gas combustion air chamber 5 and the hydrogen combustion air chamber 10 by the fixing plate 13.

[0041] The nested burner head outer ring 16 is provided with inner threads on both sides and is connected with the nested burner head inner ring 17 and the ejector 9 respectively, the nested burner head outer ring 16 is intermittently slotted 21 along the circumference as a secondary air passage for the central gun fuel, a circle of slots is opened along the circumference of the nested burner head outer ring 16 close to the outer ring, and radial holes 20 are opened as gas outlets, the circumferential slots are connected with the radial holes 20, and together constitute a hydrogen flow passage.

[0042] As Figure 3As shown, the detachable flame stabilizing ring 15 is fixed to the end of the nested burner head outer ring 16 in a buckle type structure (an inner slot 22 and a mounting gap 23 are arranged in the detachable flame stabilizing ring 15, and a convex structure on the outer edge of the nested burner head outer ring 16 is inserted into the mounting gap 23 and then rotated into the inner slot 22 to form a buckle type structure), which can be used or not used according to the load and combustion state of the fuel gas.

[0043] As shown, Figure 2 As shown, the opening on the hydrogen combustion air supply plate 14 is 90° corresponding to the radial opening of the nested burner head outer ring 16, which ensures that the combustion air and the fuel gas are fully mixed at the outlet.

[0044] The hydrogen pipeline and hydrogen gun 2, hydrogen combustion air supply plate 14, detachable flame stabilizing ring 15 and nested burner head outer ring 16 are matched, and are suitable for diffusion combustion.

[0045] The fuel gas center gun 3, ejector 9 and nested burner head inner ring 17 are matched, and are suitable for premixed combustion.

[0046] The nozzle included in the fuel gas center gun 3 has an ejecting effect, and under the action of the primary air door and its adjusting structure 4, the primary air coefficient adjusting range is 0-0.9.

[0047] The ejector 9 is a contraction and expansion type structure.

[0048] The fuel gas ignition rod 18 is a high-energy ion ignition rod, and the hydrogen ignition electrode 11 is in the form of an ion needle, which has the functions of ignition and flame detection.

[0049] The fuel gas center gun 3 is connected with the end flange of the fuel gas combustion air chamber 5, and is composed of a fuel gas inlet pipeline and a nozzle; the ejector 9 is installed in the fuel gas combustion air chamber 5 and is coaxially arranged with the fuel gas center gun 3, the ejector 9 is communicated with the nested burner head inner ring 17, and the nested burner head inner ring 17 is radially opened. When the fuel gas is a hydrocarbon combustible, the fuel gas enters the burner from the fuel gas inlet pipeline of the fuel gas center gun 3, is ejected from the nozzle, and ejects part of the combustion air into the ejector 9, and the mixed gas is ejected from the nozzle hole of the nested burner head inner ring 17, realizing premixed / partial premixed combustion.

[0050] The hydrogen pipeline and hydrogen gun 2 are installed in the hydrogen combustion air chamber 10 and connected with the nested burner head outer ring 16, and the nested burner head outer ring 16 is radially opened to supply hydrogen for ejection, realizing diffusion combustion.

[0051] The hydrogen combustion air is ejected along the axial direction through the opening on the hydrogen combustion air supply plate 14, and is perpendicular to the radially ejected hydrogen, and is mixed and burned.

[0052] The external primary air door screw rod is integrated with the internal primary air door, when the screw rod rotates and moves, it drives the primary air door to move forward and backward, the primary air passage area changes accordingly, thereby controlling the primary air quantity. The primary air coefficient adjustment range is 0-0.9. The secondary air door is composed of a fixed end 8 and a movable end 7, when the movable end 7 moves forward and backward, the secondary air flow passage area changes accordingly, thereby realizing the full opening-full closing function of the secondary air door.

[0053] The burner head is composed of a nested burner head outer ring 16 and a nested burner head inner ring 17, the nested burner head outer ring 16 and the nested burner head inner ring 17 are provided with multiple rows of openings in the radial direction, which are respectively used for diffusion combustion and premixed / partial premixed combustion. The burner head adopts a detachable structure, which is convenient for maintenance.

[0054] The part of the present application not described in detail belongs to the known technology of the person skilled in the art.

Claims

1. A sidewall burner adaptable to multiple fuels and multiple combustion methods, characterized in that, include: Hydrogen gun (2), fuel gas center gun (3), primary air damper and its adjustment structure (4), fuel gas combustion chamber (5), secondary air damper, ejector (9), hydrogen combustion chamber (10), hydrogen ignition electrode (11), hydrogen combustion air supply plate (14), nested burner head outer ring (16), nested burner head inner ring (17) and natural gas ignition rod (18); One end of the fuel gas combustion chamber (5) extends into the hydrogen combustion chamber (10) from one end face and connects to the outer ring (16) of the nested burner head. The hydrogen combustion chamber (10) is filled with hydrogen combustion air. The fuel gas combustion chamber (5) is filled with fuel gas combustion air. The hydrogen combustion air supply plate (14) is located at the other end of the hydrogen combustion chamber (10). The outer ring (16) of the nested burner head is installed at the center of the hydrogen combustion air supply plate (14) and is coaxial with the hydrogen combustion air supply plate (14). The primary air damper and its adjustment structure (4) The fuel gas center gun (3) is installed on the fuel gas center gun (3) to control the primary air volume; the inner ring (17) of the nested burner head is installed at the center hole of the outer ring (16) of the nested burner head, and the inner ring (17) of the nested burner head has a radial opening; one end of the ejector (9) is connected to the secondary air damper, and the other end is installed in the center hole of the other end face of the outer ring (16) of the nested burner head; the secondary air damper controls the opening of the secondary air duct; the hydrogen ignition electrode (11) is installed outside the hydrogen combustion chamber (10), and the fuel gas ignition rod (18) is installed inside the hydrogen combustion chamber (10); The fuel gas center gun (3) includes a fuel gas inlet pipe and a nozzle; the fuel gas enters the burner through the fuel gas inlet pipe of the fuel gas center gun (3), and after being ejected from the nozzle, a portion of the fuel gas combustion air is drawn out. The fuel gas and the drawn-out fuel gas combustion air enter the ejector (9) and mix. The mixed gas is ejected through the opening on the inner ring (17) of the nested burner head to achieve premixed or partially premixed combustion. The hydrogen gun (2) is installed in the hydrogen combustion chamber (10) and connected to the outer ring (16) of the nested burner head. The outer ring (16) of the nested burner head has radial openings (20) to supply hydrogen gas for diffusion combustion. The hydrogen combustion air is sprayed axially through the openings (19) on the hydrogen combustion air supply plate (14) and crosses perpendicularly with the hydrogen gas sprayed radially from the outer ring (16) of the nested burner head for mixing and combustion. The primary air damper and its adjustment structure (4) are fitted onto the fuel gas center gun (3) and are arranged coaxially with the fuel gas center gun (3). The primary air damper and its adjustment structure (4) are installed at one end of the fuel gas combustion chamber (5). The primary air damper and its adjustment structure (4) are coaxial with the fuel gas combustion chamber (5). The primary air damper and its adjustment structure (4) include an adjustment rod and a circular primary air damper. The primary air damper is located at one end of the adjustment rod, and an adjustment handle is located at the other end of the adjustment rod. The internal thread of the adjustment rod is engaged with the external thread of the fuel gas center gun (3). The primary air damper is located inside the fuel gas combustion chamber (5) and moves longitudinally along the fuel gas combustion chamber (5) through the adjustment mechanism. The channel between the primary air damper and the inlet of the ejector (9) is the primary air flow channel. When the adjustment handle is rotated, the adjustment rod drives the primary air damper to move along the axial direction, so that the primary air flow area changes. The adjustment handle is located outside the fuel gas combustion chamber (5). The position of the primary air damper is determined by observing the position of the adjustment handle. The secondary air damper includes a movable end (7) and a fixed end (8); the movable end (7) is coaxial with the fuel gas combustion chamber (5) and can move longitudinally along the fuel gas combustion chamber (5); the fixed end (8) is located inside the fuel gas combustion chamber (5) and works with the movable end (7) to control the opening of the secondary air duct; an opening is provided on the side wall of the cylinder of the fuel gas combustion chamber (5), and an external thread is provided at the opening; the side of the movable end (7) of the secondary air damper is provided with an internal thread. The structure extends from the opening into the fuel gas combustion chamber (5). The internal thread on the movable end (7) of the secondary air damper is connected to the external thread on the cylinder of the fuel gas combustion chamber (5). One end face of the movable end (7) of the secondary air damper is inclined, and the fixed end (8) of the secondary air damper is a sleeve structure with an arc-shaped raised structure in the middle of the outer wall. When the movable end (7) of the secondary air damper moves back and forth along the axial direction, it causes a change in the flow channel area between the inclined end face of the movable end (7) of the secondary air damper and the arc-shaped raised structure of the fixed end (8) of the secondary air damper, thereby realizing the control of the secondary air volume.

2. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 1, characterized in that: The ejector (9) is an ejector with a diffusion section.

3. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 2, characterized in that: The outer ring (16) of the nested burner head is provided with an annular gas channel near the side wall. The outer ring (16) of the nested burner head has several radial through holes that are evenly distributed around the side wall and communicate with the annular gas channel. The hydrogen gun (2) is connected to the annular gas channel inside the outer ring (16) of the nested burner head to form a hydrogen flow channel. The openings of the outer ring (16) and the inner ring (17) of the nested burner head are all radial multi-row holes. The arrangement of the openings and the opening area are adjusted according to the fuel gas. The central hole of the outer ring (16) of the nested burner head is provided with internal threads on both sides, which are used to connect with the inner ring (17) of the nested burner head and the ejector (9). Several fan-shaped slots (21) are provided around the central hole as secondary air channels for the fuel of the fuel gas center gun (3).

4. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 3, characterized in that: The nested burner head outer ring (16), nested burner head inner ring (17), and ejector (9) are fixed to the inner walls of the fuel gas combustion chamber (5) and the hydrogen combustion chamber (10) by a fixing plate (13).

5. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 4, characterized in that: The nozzle contained in the fuel gas center gun (3) has an ejector function, and under the action of the primary air damper and its adjustment structure (4), the primary air coefficient can be adjusted from 0 to 0.

9.

6. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 5, characterized in that: It also includes a detachable flame stabilizer ring (15), which is fixed to the end of the outer ring (16) of the nested burner head using a snap-fit ​​structure. Whether to use the detachable flame stabilizer ring (15) depends on the fuel gas load and combustion state.

7. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 6, characterized in that: The hydrogen combustion air supply plate (14) has evenly spaced holes (19) around the center on the edge of the outer ring mounting hole of the nested burner head to allow hydrogen combustion air to flow. The central axis of the holes (19) on the hydrogen combustion air supply plate (14) along the edge of the outer ring mounting hole of the nested burner head is at 90° to the central axis of the radial through hole (20) of the outer ring (16) of the nested burner head and the holes correspond one-to-one.

8. A sidewall burner adaptable to multiple fuels and multiple combustion modes according to claim 7, characterized in that: It also includes a hydrogen supply air pipeline (1) and a fuel gas supply air pipeline (6); one end of the hydrogen supply air pipeline (1) is connected to the hydrogen combustion air pipeline, and the other end of the hydrogen supply air pipeline (1) is connected to the hydrogen combustion air chamber (10); the fuel gas supply air pipeline (6) is installed on the side wall of the fuel gas combustion air chamber (5).

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