Side wall combustor suitable for various fuels and various combustion modes

Abstract

The invention provides a side wall combustor suitable for various fuels and various combustion modes. The side wall combustor comprises a hydrogen gun, a fuel gas center gun and the like. Fuel gas enters the combustor through a fuel gas inlet pipeline of the fuel gas center gun, part of fuel gas combustion-supporting air is injected after the fuel gas is sprayed out through the nozzle, the fuel gas and the injected fuel gas combustion-supporting air enter the ejector to be mixed, mixed gas is sprayed out through holes in an inner ring of the nested burner head, and premixed or partially premixed combustion is achieved. The hydrogen gun is installed in the hydrogen combustion-supporting air chamber and connected with the nested burner head outer ring, and holes are formed in the nested burner head outer ring in the radial direction so that hydrogen can be sprayed out, and diffusion combustion is achieved. Hydrogen combustion-supporting air is sprayed out in the axial direction through holes in the hydrogen combustion-supporting air supply plate and perpendicularly intersects with hydrogen sprayed out of the outer ring of the nested burner head in the radial direction, and mixed combustion is carried out. According to fuel gas with different properties, the stable combustion state of premixed combustion and diffusion combustion is achieved at the same time.

Description

Technical Field

[0001] The invention relates to a side wall burner and belongs to the field of burners. Background Art

[0002] Hydrogen energy has many advantages and is currently attracting global attention. It is also known as the energy with the greatest development potential in the 21st century and has been developing well worldwide in recent years. Under the "dual carbon" goal, China's economic and energy transformation is imperative, among which hydrogen energy development has become a hot topic and has attracted much attention from governments at all levels and related companies.

[0003] For chemical companies that can produce hydrogen as a byproduct, using hydrogen as a fuel to supply industrial furnaces and other equipment is currently one of the main uses of hydrogen. However, for industrial furnaces that use hydrocarbon combustibles such as natural gas as fuel, the combustion properties of hydrocarbon fuel gas and hydrogen are very different, and industrial furnaces need to be equipped with brand-new burners suitable for both fuels. Hydrocarbon fuel gas usually uses a premixed or partially premixed combustion method. Hydrogen is prone to flashback problems due to its high mass calorific value, high-level flow flame speed, low ignition delay, and high adiabatic flame temperature. Therefore, hydrogen usually uses a diffusion combustion method. The commonly used mixed combustion burner is to add a set of hydrogen spray guns around the natural gas burner, which is equivalent to a mechanical combination of two burners, with a complex structure and poor adjustability. Summary of the invention

[0004] The technical problem to be solved by the present invention is: the present invention provides a side wall burner that is adaptable to multiple fuels and multiple combustion modes, and on the premise of meeting the process requirements, it can achieve stable combustion states of premixed combustion and diffusion combustion for fuel gases of different properties at the same time.

[0005] The technical solution adopted by the present invention is: a side wall burner adapting to various fuels and various combustion modes, including: a hydrogen gun, a fuel gas central gun, a primary air door and its adjustment structure, a fuel gas combustion-supporting air chamber, a secondary air door, an ejector, a hydrogen combustion-supporting air chamber, a hydrogen ignition electrode, a hydrogen combustion-supporting 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-supporting air chamber extends from the end face of one end of the hydrogen combustion-supporting air chamber into the hydrogen combustion-supporting air chamber and is connected to the outer ring of the nested burner head, and the hydrogen combustion-supporting air chamber is filled with hydrogen combustion-supporting air; the fuel gas combustion-supporting air chamber is filled with fuel gas combustion-supporting air; the hydrogen combustion-supporting air supply plate is located at the other end of the hydrogen combustion-supporting air chamber; the outer ring of the nested burner head is installed in the center of the hydrogen combustion-supporting air supply plate and is coaxial with the hydrogen combustion-supporting air supply plate; the primary air door and its adjustment structure are installed on the fuel gas center gun to control the primary air volume; the 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 of the nested burner head has radial openings; one end of the ejector is connected to the secondary air door, and the other end is installed in the center hole of the other end face of the outer ring of the nested burner head; the secondary air door controls the opening of the secondary air duct; the hydrogen ignition electrode is installed outside the hydrogen combustion-supporting air chamber, and the fuel gas ignition rod is installed in the hydrogen combustion-supporting air chamber;

[0007] The fuel gas center gun includes a fuel gas inlet pipeline and a nozzle; the fuel gas enters the burner through the fuel gas inlet pipeline of the fuel gas center gun, and is ejected from the nozzle to induce part of the fuel gas combustion-supporting air, the fuel gas and the induced fuel gas combustion-supporting air enter the ejector to mix, and the mixed gas is ejected through the openings 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-supporting air chamber and connected to the outer ring of the nested burner head. The outer ring of the nested burner head has radial holes for hydrogen to spray out and realize diffusion combustion.

[0009] The hydrogen combustion-supporting air is ejected axially through the openings on the hydrogen combustion-supporting air supply plate, and vertically intersects with the hydrogen ejected radially from the outer ring of the nested burner head for mixed combustion.

[0010] Furthermore, the primary air valve and its adjustment structure are sleeved on the fuel gas center gun and arranged coaxially with the fuel gas center gun. The primary air valve and its adjustment structure are installed at one end of the fuel gas combustion-supporting air chamber, and the primary air valve and its adjustment structure are coaxial with the fuel gas combustion-supporting air chamber; the primary air valve and its adjustment structure include an adjusting rod and a circular primary air valve, the primary air valve is arranged at one end of the adjusting rod, and an adjusting handle is arranged at the other end of the adjusting rod, the internal thread of the adjusting rod cooperates with the external thread of the fuel gas center gun, the primary air valve is located in the fuel gas combustion-supporting air chamber and moves along the longitudinal direction of the fuel gas combustion-supporting air chamber through the adjusting mechanism, the channel between the primary air valve and the ejector inlet is the primary air flow channel, when the adjusting handle is rotated, the adjusting rod drives the primary air valve to move along the axial direction, so that the primary air flow area changes; the adjusting handle is arranged outside the fuel gas combustion-supporting air chamber, and the position of the primary air valve is judged by observing the position of the adjusting handle.

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

[0012] Furthermore, the secondary air valve comprises a secondary air valve movable end and a secondary air valve fixed end; the secondary air valve movable end is coaxial with the fuel gas combustion-supporting air chamber, and the secondary air valve movable end can move longitudinally along the fuel gas combustion-supporting air chamber; the secondary air valve fixed end is located inside the fuel gas combustion-supporting air chamber, and cooperates with the secondary air valve movable end 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-supporting air chamber, an external thread is provided at the opening, and a protruding structure with an internal thread is provided on the side of the secondary air valve movable end, which extends out of the fuel gas combustion-supporting air chamber from the opening, and the internal thread on the secondary air valve movable end is cooperated and connected with the external thread on the cylinder of the fuel gas combustion-supporting air chamber, one end face of the secondary air valve movable end is an inclined surface, the fixed end of the secondary air valve is a sleeve structure, and an arc-shaped bulge structure is provided in the middle of the outer wall. When the secondary air valve movable end moves back and forth along the axial direction, the flow channel area between the inclined end face of the movable end of the secondary air valve and the arc-shaped bulge structure of the fixed end of the secondary air valve changes, thereby realizing the control of the secondary air volume.

[0013] Furthermore, an annular air passage is arranged near the side wall in the outer ring of the nested burner head, and a plurality of radial through holes connected to the annular air passage are evenly distributed circumferentially on the side wall of the outer ring of the nested burner head. The hydrogen gun is connected to the annular air passage in the outer ring of the nested burner head to form a hydrogen flow channel; the openings of the outer ring of the nested burner head and the inner ring of the nested burner head are both radial multiple rows of holes, and the arrangement of the openings and the area of ​​the openings are adjusted according to the fuel gas; internal threads are arranged on both sides of the center hole of the outer ring of the nested burner head, which are respectively used to be connected to the inner ring of the nested burner head and the ejector, and a plurality of fan-shaped grooves are arranged circumferentially on the outer side of the center hole as secondary air passages for fuel of the fuel gas center gun.

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

[0015] Furthermore, the nozzle included in the fuel gas central gun has an ejection function, and under the action of the primary air door and its adjustment structure, the primary air coefficient adjustment range is 0 to 0.9.

[0016] Furthermore, the side wall burner adapted to multiple fuels and multiple combustion modes also includes a removable flame stabilizing ring, which is fixed to the outer ring end of the nested burner head with a snap-on structure. Whether to use the removable flame stabilizing ring is determined according to the load and combustion state of the fuel gas.

[0017] Furthermore, the hydrogen combustion-supporting air supply plate is evenly opened with holes around the center of the circle at the edge of the nested burner head outer ring mounting hole to allow hydrogen combustion-supporting air to circulate; the center axis of the opening on the hydrogen combustion-supporting air supply plate along the edge of the nested burner head outer ring mounting hole is 90° to the center axis of the radial through hole of the nested burner head outer ring and the holes correspond one to one.

[0018] Furthermore, the side wall burner that is adaptable to multiple fuels and multiple combustion modes also includes a hydrogen air supply pipeline and a fuel gas air supply pipeline; one end of the hydrogen air supply pipeline is connected to the hydrogen combustion-supporting air pipeline, and the other end of the hydrogen air supply pipeline is connected to the hydrogen combustion-supporting air chamber; the fuel gas air supply pipeline is arranged on the side wall of the fuel gas combustion-supporting air chamber.

[0019] The advantages of the present invention compared with the prior art are:

[0020] (1) The present invention designs a new burner. When combustible gases with different combustion properties are used as fuel gas, they pass through the outer ring and inner ring of the burner head with a nested structure, and by adjusting the ratio of primary and secondary air, a synchronous stable combustion state of diffusion combustion and premixed combustion is achieved.

[0021] (2) The present invention is a new type of integrated burner that can adapt to different fuels with greatly different properties and has a simple structure and a large adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of the novel burner of the present invention;

[0023] Figure 2 This is the hole diagram of the inner and outer rings of the nested burner head and the air supply plate;

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

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

[0026] The present invention is described with reference to the accompanying drawings.

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

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

[0029] The hydrogen gun 2 and the fuel gas combustion-supporting air chamber 5 penetrate from the end face of one end of the hydrogen combustion-supporting air chamber 10, and the hydrogen pipeline and the hydrogen gun 2 are sealed and connected with the outer ring 16 of the nested burner head; the fuel gas combustion-supporting air chamber 5 is connected with the outer ring 16 of the nested burner head;

[0030] The hydrogen combustion-supporting air supply plate 14 is located at the other end of the hydrogen combustion-supporting air chamber 10; the nested burner head outer ring 16 is installed at the center of the hydrogen combustion-supporting air supply plate 14 and is coaxial with the hydrogen combustion-supporting air supply plate 14; holes 19 are evenly opened around the center of the hydrogen combustion-supporting air supply plate 14 to allow the combustion-supporting air to circulate;

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

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

[0033] The nested burner head inner ring 17 is installed at the center hole of the nested burner head outer ring 16. The nested burner head inner ring 17 is opened radially. The detachable flame stabilizing ring 15 is nested on the outer edge of one end of the nested burner head outer ring 16.

[0034] One end of the ejector 9 is connected to the secondary air door fixed end 8, and the other end is installed in the center hole of the other end face of the nested burner head outer ring 16, and is fixed inside the fuel gas combustion air chamber 5 through the fixing 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-supporting air chamber 10. The hydrogen ignition electrode 11 and the fuel gas ignition rod 18 are used for ignition;

[0036] The primary air door and its adjustment 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, and an adjusting handle is arranged at the other end of the adjusting rod. The internal thread of the adjusting rod cooperates with the external thread of the fuel gas center gun 3. The channel between the primary air door and the inlet of the ejector 9 is the primary air flow channel. 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 volume; the adjusting handle is arranged outside the fuel gas combustion-supporting air chamber 5, and the position of the primary air door is judged by observing the position of the adjusting handle.

[0037] The ejector 9 is an ejector with a diffusion section, which can achieve full mixing of the fuel gas and the primary air.

[0038] An opening is arranged on the side wall of the cylinder of the fuel gas combustion-supporting air chamber 5, and an external thread is arranged at the opening. A protruding structure with an internal thread is arranged on the side of the secondary air valve movable end 7, which extends out of the fuel gas combustion-supporting air chamber 5 from the opening. The internal thread on the secondary air valve movable end 7 is matched and connected with the external thread on the cylinder of the fuel gas combustion-supporting air chamber 5. One end face of the secondary air valve movable end 7 is an inclined surface, and the secondary air valve fixed end 8 is a sleeve structure. An arc-shaped bulge structure is arranged in the middle of the outer wall. When the secondary air valve movable end 7 moves forward and backward along the axial direction, the flow channel area between the inclined end face of the secondary air valve movable end 7 and the arc-shaped bulge structure of the secondary air valve fixed end 8 changes, thereby realizing the control of the secondary air volume.

[0039] The nested burner head outer ring 16 and the nested burner head inner ring 17 are threadedly connected for easy disassembly. The openings of the nested burner head outer ring 16 and the nested burner head inner ring 17 are both radial multiple rows of holes, and the hole arrangement and opening area are adjustable according to the form of 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-supporting air chamber 5 and the hydrogen combustion-supporting air chamber 10 by means of the fixing plate 13 .

[0041] Internal threads are arranged on both sides of the nested burner head outer ring 16, which are respectively connected to the nested burner head inner ring 17 and the ejector 9. The nested burner head outer ring 16 has intermittent grooves 21 along the circumferential direction as the secondary air channel for the center gun fuel. The nested burner head outer ring 16 has a circle of grooves along the circumferential direction close to the outer ring, and radial openings 20 are used as gas outlets. The circumferential grooves are connected to the radial openings 20 to form a hydrogen flow channel together.

[0042] like Figure 3As shown, the detachable flame-stabilizing ring 15 adopts a snap-on structure (an inner groove 22 and a mounting notch 23 are provided on the inner ring of the detachable flame-stabilizing ring 15, and the protruding structure on the outer edge of the outer ring 16 of the nested burner head is inserted into the mounting notch 23 and then rotated into the inner groove 22 to form a bayonet structure) and is fixed to the end of the outer ring 16 of the nested burner head. Whether to use it can be decided according to the load and combustion state of the fuel gas.

[0043] like Figure 2 As shown, the openings on the hydrogen combustion-supporting air supply plate 14 correspond to the radial openings of the nested burner head outer ring 16 at 90 degrees, ensuring that the combustion-supporting air and the fuel gas are fully mixed at the outlet.

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

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

[0046] The nozzle included in the fuel gas central gun 3 has an ejection function. Under the action of the primary air door and its adjustment structure 4, the primary air coefficient adjustment range is 0 to 0.9.

[0047] The ejector 9 is a contraction-expansion 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 both ignition and fire detection functions.

[0049] The fuel gas center gun 3 is connected to the end flange of the fuel gas combustion-supporting air chamber 5. The fuel gas center gun 3 is composed of a fuel gas intake pipeline and a nozzle. The ejector 9 is installed in the fuel gas combustion-supporting air chamber 5 and is coaxially arranged with the fuel gas center gun 3. The ejector 9 is connected to the nested burner head inner ring 17, and the nested burner head inner ring 17 has radial holes. When the fuel gas is a hydrocarbon combustible, the fuel gas enters the burner through the fuel gas intake pipeline of the fuel gas center gun 3, and after being ejected by the nozzle, part of the combustion-supporting air is ejected and mixed with the ejected combustion-supporting air entering the ejector 9. The mixed gas is ejected through the spray hole of the nested burner head inner ring 17 to achieve premixed / partially premixed combustion.

[0050] The hydrogen pipeline and the hydrogen gun 2 are installed in the hydrogen combustion-supporting wind chamber 10 and connected to the nested burner head outer ring 16. The nested burner head outer ring 16 has radial openings for hydrogen to spray out and realize diffusion combustion.

[0051] The hydrogen combustion-supporting air is ejected axially through the openings on the hydrogen combustion-supporting air supply plate 14, perpendicularly intersecting the radially ejected hydrogen, and burning while mixing.

[0052] The external primary damper spiral rod is connected to the internal primary damper. When the spiral rod rotates and moves, it drives the primary damper to move forward and backward, and the area of ​​the primary air channel changes accordingly, thereby controlling the primary air volume. The primary air coefficient adjustment range is 0 to 0.9. The secondary damper consists of a fixed end 8 and a movable end 7. When the movable end 7 moves forward and backward, the secondary air flow area changes accordingly, thereby realizing the full opening and full closing function of the secondary damper.

[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 have multiple rows of openings along the radial direction, which are used for diffusion combustion and premixed / partially premixed combustion respectively. The burner head adopts a detachable structure for easy maintenance.

[0054] Parts of the present invention that are not described in detail belong to the well-known technologies of those skilled in the art.

Claims

1. A side wall burner adapted to various fuels and various combustion modes, characterized in that: include: A hydrogen gun (2), a fuel gas central gun (3), a primary air door and its regulating structure (4), a fuel gas combustion-supporting air chamber (5), a secondary air door, an ejector (9), a hydrogen combustion-supporting air chamber (10), a hydrogen ignition electrode (11), a hydrogen combustion-supporting air supply plate (14), a nested burner head outer ring (16), a nested burner head inner ring (17) and a natural gas ignition rod (18); One end of the fuel gas combustion-supporting air chamber (5) extends from one end face of the hydrogen combustion-supporting air chamber (10) into the hydrogen combustion-supporting air chamber (10) and is connected to the nested burner head outer ring (16); the hydrogen combustion-supporting air chamber (10) is filled with hydrogen combustion-supporting air; the fuel gas combustion-supporting air chamber (5) is filled with fuel gas combustion-supporting air; the hydrogen combustion-supporting air supply plate (14) is located at the other end of the hydrogen combustion-supporting air chamber (10); the nested burner head outer ring (16) is installed at the center of the hydrogen combustion-supporting air supply plate (14) and is coaxial with the hydrogen combustion-supporting air supply plate (14); the primary air door and its adjustment structure (4 ) is installed on the fuel gas center gun (3) and is used to control the size of the primary air volume; the nested burner head inner ring (17) is installed at the center hole of the nested burner head outer ring (16), and the nested burner head inner ring (17) is opened in the radial direction; one end of the ejector (9) is connected to the secondary air valve, and the other end is installed in the center hole of the other end face of the nested burner head outer ring (16); the secondary air valve controls the opening of the secondary air duct; the hydrogen ignition electrode (11) is installed outside the hydrogen combustion-supporting air chamber (10), and the fuel gas ignition rod (18) is installed inside the hydrogen combustion-supporting air chamber (10); The fuel gas central gun (3) comprises a fuel gas inlet pipeline and a nozzle; the fuel gas enters the burner through the fuel gas inlet pipeline of the fuel gas central gun (3), and is ejected from the nozzle to induce a portion of the fuel gas combustion-supporting air, the fuel gas and the induced fuel gas combustion-supporting air enter the ejector (9) and are mixed, and the mixed gas is ejected through the openings on the inner ring (17) of the nested burner head, thereby achieving premixed or partially premixed combustion; The hydrogen gun (2) is installed in the hydrogen combustion-supporting air 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) for hydrogen to be ejected, thereby achieving diffusion combustion. The hydrogen combustion-supporting air is ejected axially through the openings (19) on the hydrogen combustion-supporting air supply plate (14), and vertically intersects with the hydrogen ejected radially from the outer ring (16) of the nested burner head, thereby achieving mixed combustion.

2. A side wall burner adapted to multiple fuels and multiple combustion modes according to claim 1, characterized in that: The primary air door and its adjustment structure (4) are sleeved on the fuel gas center gun (3) and are coaxially arranged with the fuel gas center gun (3). The primary air door and its adjustment structure (4) are installed at one end of the fuel gas combustion-supporting air chamber (5). The primary air door and its adjustment structure (4) are coaxial with the fuel gas combustion-supporting air chamber (5); the primary air door and its adjustment structure (4) include an adjustment rod and a circular primary air door. The primary air door is arranged at one end of the adjustment rod, and an adjustment handle is arranged at the other end of the adjustment rod. The internal thread of the adjustment rod cooperates with the external thread of the fuel gas center gun (3). The primary air door is located in the fuel gas combustion-supporting air chamber (5) and moves longitudinally along the fuel gas combustion-supporting air chamber (5) through the adjustment mechanism. The channel between the primary air door 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 door to move along the axial direction, so that the primary air flow area changes. The adjustment handle is arranged outside the fuel gas combustion-supporting air chamber (5), and the position of the primary air door is judged by observing the position of the adjustment handle.

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

4. A side wall burner adapted to multiple fuels and multiple combustion modes according to claim 3, characterized in that: The secondary air valve comprises a secondary air valve movable end (7) and a secondary air valve fixed end (8); the secondary air valve movable end (7) is coaxial with the fuel gas combustion-supporting air chamber (5), and the secondary air valve movable end (7) can move in the longitudinal direction of the fuel gas combustion-supporting air chamber (5); the secondary air valve fixed end (8) is located inside the fuel gas combustion-supporting air chamber (5), and cooperates with the secondary air valve 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-supporting air chamber (5), an external thread is provided at the opening, and a convex thread with an internal thread is provided on the side of the secondary air valve movable end (7). The secondary air valve has a structure extending out of the fuel gas combustion-supporting air chamber (5) from an opening, an internal thread on a secondary air valve movable end (7) is connected with an external thread on a cylinder of the fuel gas combustion-supporting air chamber (5), one end face of the secondary air valve movable end (7) is an inclined surface, the secondary air valve fixed end (8) is a sleeve structure, and an arc-shaped bulge structure is arranged in the middle of the outer wall. When the secondary air valve movable end (7) moves forward and backward along the axial direction, the flow channel area between the inclined end face of the secondary air valve movable end (7) and the arc-shaped bulge structure of the secondary air valve fixed end (8) changes, thereby realizing the control of the secondary air volume.

5. A side wall burner adapted to multiple fuels and multiple combustion modes according to claim 4, characterized in that: An annular air passage is arranged near the side wall of the nested burner head outer ring (16). A plurality of radial through holes (20) connected to the annular air passage are evenly distributed on the side wall of the nested burner head outer ring (16) around the circumference. The hydrogen gun (2) is connected to the annular air passage in the nested burner head outer ring (16) to form a hydrogen flow passage. The openings of the nested burner head outer ring (16) and the nested burner head inner ring (17) are both radial multiple-row holes, and the arrangement of the openings and the opening area are adjusted according to the fuel gas. Internal threads are arranged on both sides of the center hole of the nested burner head outer ring (16), which are respectively used to connect with the nested burner head inner ring (17) and the ejector (9). A plurality of fan-shaped slots (21) are arranged along the circumference on the outer side of the center hole to serve as secondary air passages for the fuel of the fuel gas center gun (3).

6. A side wall burner adapted to multiple fuels and multiple combustion modes according to claim 5, characterized in that: 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-supporting air chamber (5) and the hydrogen combustion-supporting air chamber (10) via a fixing plate (13).

7. A side wall burner adapted to various fuels and various combustion modes according to claim 6, characterized in that: The nozzle included in the fuel gas central gun (3) has an ejection function. Under the action of the primary air door and its adjustment structure (4), the primary air coefficient adjustment range is 0 to 0.

9.

8. A side wall burner adapted to multiple fuels and multiple combustion modes according to claim 7, characterized in that: It also includes a detachable flame stabilizing ring (15), which is fixed to the end of the nested burner head outer ring (16) by a snap-on structure. Whether to use the detachable flame stabilizing ring (15) is determined according to the load and combustion state of the fuel gas.

9. The side wall burner adapted to various fuels and various combustion modes according to claim 7, characterized in that: The hydrogen combustion-supporting air supply plate (14) is provided with holes (19) uniformly opened around the center of a circle at the edge of the mounting hole of the outer ring of the nested burner head to allow hydrogen combustion-supporting air to circulate; the central axis of the openings (19) along the edge of the mounting hole of the outer ring of the nested burner head on the hydrogen combustion-supporting air supply plate (14) is at a 90° angle to the central axis of the radial through holes (20) of the outer ring (16) of the nested burner head and the openings correspond one to one.

10. A side wall burner adapted to multiple fuels and multiple combustion modes according to claim 9, characterized in that: It also includes a hydrogen air supply pipeline (1) and a fuel gas air supply pipeline (6); one end of the hydrogen air supply pipeline (1) is connected to the hydrogen combustion-supporting air pipeline, and the other end of the hydrogen air supply pipeline (1) is connected to the hydrogen combustion-supporting air chamber (10); the fuel gas air supply pipeline (6) is arranged on the side wall of the fuel gas combustion-supporting air chamber (5).

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