An integrated burner structure and a heating furnace

Abstract

The present invention provides an integrated burner structure and a heating furnace. The integrated burner structure includes: a main burner, which has a cavity structure. One side of the main burner is provided with a main burner fuel gas interface communicating with its cavity, and the top of the main burner is provided with a main burner combustion port; a pilot burner device, which includes a lamp body and a mixing body connected to one end of the lamp body. The lamp body is inserted into the main burner, and the top of the lamp body extends out of the top of the main burner. The mixing body connected to the lower end of the lamp body is installed below the main burner; and a flame stabilizing protection cover, which is sleeved on the top of the main burner to cover the outside of the top of the lamp body. According to the present invention, when the heating furnace fluctuates, that is, once the main burner goes out, the pilot burner device can be used for ignition operation to prevent flash explosion in the furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of heating furnaces, and particularly to an integrated burner structure and a heating furnace. Background Art

[0002] Currently, heating furnaces are essential equipment in the petrochemical industry and are widely used for heating and heat transfer of materials. Generally, the gas consumption of heating furnaces is a major consumer of production energy. A number of burners are arranged in the heating furnace, and fuels such as natural gas or liquefied natural gas are transported into the heating furnace and ignited after being sprayed by the burner nozzles.

[0003] However, in the actual production operation of heating furnaces, due to sudden changes in the external environment or fluctuations in the fuel gas system, such as strong winds or low fuel gas pressure, furnace extinguishing events often occur, especially in small heating furnaces with natural ventilation. When a main burner suddenly extinguishes, due to the change in the combustion condition in the furnace, the furnace negative pressure and the excess air coefficient change sharply, and it is very easy for the pilot burner to blow out immediately after the main burner extinguishes. If the pilot burner cannot be properly handled in time after extinguishing, serious safety production accidents will occur. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide an integrated burner structure and a heating furnace, which are used to solve the problems in the prior art that after the main burner of the burner extinguishes, the pilot burner also extinguishes immediately, resulting in furnace shutdown and gas enrichment and flash explosion in the furnace.

[0005] To achieve the above purpose and other related purposes, the present invention provides an integrated burner structure, including: a main burner, the main burner is a cavity structure, a main burner fuel gas interface connected to its cavity is arranged on one side of the main burner, and a main burner combustion port is arranged on the top of the main burner; a pilot burner device, the pilot burner device includes a lamp body and a mixing body connected to one end of the lamp body, the lamp body is inserted into the main burner, and the top of the lamp body extends out of the top of the main burner, and the mixing body connected to the lower end of the lamp body is installed below the main burner; and a flame stabilizing protection cover, the flame stabilizing protection cover is sleeved on the top of the main burner to cover the outside of the top of the lamp body.

[0006] In an embodiment of the present invention, the main burner is a long cylindrical structure, the main burner combustion ports are circumferentially arranged on the top of the main burner, and the main burner combustion ports are located inside the flame stabilizing protection cover.

[0007] In an embodiment of the present invention, a mixing air duct is arranged along the axial direction in the middle of the lamp body, the central axis of the mixing air duct coincides with the central axis of the main burner, the top end of the lamp body is conical, and upper gas nozzles communicated with the mixing air duct are arranged on the surface of the conical top of the lamp body.

[0008] In an embodiment of the present invention, the mixing body includes: an air chamber seat installed at one end of the main burner away from the flame stabilization protection cover, and a vacuum chamber is provided inside the air chamber seat; a pilot fuel gas injection throat pipe installed on the air chamber seat, with a lower gas nozzle provided at one end of the pilot fuel gas injection throat pipe, and the pilot fuel gas injection throat pipe passes through the side wall of the air chamber seat so that the lower gas nozzle is arranged inside the vacuum chamber; and a control valve assembly installed on one side of the air chamber seat to control the passage of air into the vacuum chamber.

[0009] In an embodiment of the present invention, a pilot fuel gas channel is provided in the middle of the pilot fuel gas injection throat pipe along its axial direction. The pilot fuel gas interface of the pilot fuel gas injection throat pipe is located directly below the air chamber seat, and the central axis of the pilot fuel gas channel communicated with the pilot fuel gas interface coincides with the central axis of the mixing channel.

[0010] In an embodiment of the present invention, the cross-sectional area size of the vacuum chamber in its radial direction is larger than the cross-sectional area size of the mixing channel in its radial direction.

[0011] In an embodiment of the present invention, the control valve assembly includes: an air intake pipeline communicated on one side of the air chamber seat; and a control valve installed on the air intake pipeline to control the amount of air passing into the vacuum chamber.

[0012] In an embodiment of the present invention, the flame stabilization protection cover includes: a cover body which is a hollow horn-shaped with a continuously increasing radial size from bottom to top. The lower end of the cover body is connected to the top edge of the main burner, and an outlet is provided at the top of the cover body; a stabilizing bracket installed on the top of the flame stabilization protection cover corresponding to the outlet, and an installation position is provided in the middle of the stabilizing bracket; and a pilot ring installed at the installation position of the stabilizing bracket, the center of the pilot ring corresponds to the center of the outlet, the pilot ring is located at the outer flame of the main burner combustion, and the gas injection direction of the upper gas nozzle corresponds to the pilot ring.

[0013] In an embodiment of the present invention, a number of ventilation micropores for communicating the inside and outside are arranged on the surface of the cover body.

[0014] The present invention also provides a heating furnace including the aforementioned integrated burner structure.

[0015] Advantages of the present invention: An integrated burner structure and a heating furnace proposed by the present invention combine the main burner and the pilot burner device into one. Through the pilot burner device in the center of the burner mechanism, the mixing chamber formed by the pilot burner gas and air mixing chamber (i.e., the vacuum chamber) and the mixing air duct, the flame stabilization protection cover around the top of the main burner, the ignition ring at the top of the pilot burner device, and the main burner around the periphery below the top of the pilot burner device, separate fuel gas supply systems for the pilot burner fuel gas and air and the main burner fuel gas are realized. The pilot burner ignited by separate gas supply ignites the main burner fuel gas of the main burner in the flame stabilization protection cover, realizing the resumption of combustion of the heating furnace. That is, when fluctuations occur in the heating furnace, once the main burner goes out, the ignition operation can be carried out with the help of the pilot burner device to prevent flash explosion in the furnace. Thus, the problems such as the pilot burner also going out immediately after the main burner of the burner goes out, and then causing the shutdown of the heating furnace and the enrichment and flash explosion of the gas in the furnace are solved, ensuring the stability of the anti-fluctuation performance, the flame detachment combustion performance, etc. of the burner nozzle of the heating furnace during combustion to meet the requirements of safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the integrated burner structure of the present invention.

[0017] Figure 2 It is a top view of the integrated burner structure of the present invention.

[0018] Description of Component Labels

[0019] Main burner 1; Pilot burner device 2; Flame stabilization protection cover 3; Main burner fuel gas interface 11; Main burner combustion port 12; Lamp body 21; Mixing body 22; Mixing air duct 211; Upper gas nozzle 212; Gas chamber seat 221; Vacuum chamber 222; Pilot burner fuel gas injection throat 223; Control valve assembly 224; Pilot burner fuel gas duct 2231; Pilot burner fuel gas interface 2232; Lower gas nozzle 2233; Air suction pipeline 2241; Control valve 2242; Cover body 31; Outlet 32; Ignition ring 33; Stable support 34. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0021] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present invention. Therefore, only the components related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0022] In the following description, numerous details are explored to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0023] Please refer to Figure 1 , the present invention provides an integrated burner structure, including: a main burner 1, the main burner 1 is a cavity structure, one side of the main burner 1 is provided with a main burner fuel gas interface 11 communicating with its cavity, and the top of the main burner 1 is provided with a main burner combustion port 12; a pilot burner device 2, the pilot burner device 2 includes a lamp body 21 and a mixing body 22 connected to one end of the lamp body 21, the lamp body 21 is inserted into the main burner 1, and the top of the lamp body 21 extends out of the top of the main burner 1, and the mixing body 22 connected to the lower end of the lamp body 21 is installed below the main burner 1; and a flame stabilizing protection cover 3, the flame stabilizing protection cover 3 is sleeved on the top of the main burner 1 to cover the outside of the top of the lamp body 21.

[0024] It is not difficult to find from the above that in the burner nozzle structure of the present invention, by inserting the pilot burner device 2 in the middle of the main burner nozzle 1, the main burner nozzle and the pilot burner device 2 are combined into one. During the working process, the pilot burner device 2 and the main burner nozzle 1 respectively adopt separate fuel gas supply systems. Specifically, the pilot burner fuel gas enters from the mixing main body 22 at a relatively high speed, and is properly proportioned (for convenient ignition) and fully mixed with the inhaled air in the mixing main body 22, and then reaches the top of the lamp main body 21 to be ignited. Immediately afterwards, the ignited pilot burner burns stably, and a negative pressure is formed at the top of the flame stabilizing protection cover 3. When the main burner nozzle fuel gas is input from the main burner nozzle fuel gas interface 11 on one side of the main burner nozzle 1 and the main burner nozzle fuel gas is ejected from the main burner nozzle combustion port 12, the main burner nozzle fuel gas is mixed with the air inhaled by the flame stabilizing protection cover 3 and is ignited by the burning pilot burner device 2, so that the combustion resumes normal. That is, in the integrated main burner nozzle 1, pilot burner device 2 and flame stabilizing protection cover 3, the main burner nozzle fuel gas ejected from the main burner nozzle combustion port 12 is ignited by the ignited pilot burner device 2. It can be seen from the above that by extending the top of the lamp main body 21 above the main burner nozzle combustion port 12 of the main burner nozzle 1, a large amount of fuel gas can be prevented from being instantaneously enriched around the pilot burner combustion, so that the ignited pilot burner will not go out. The flame stabilizing protection cover 3 can prevent the rapid change of the negative pressure in the furnace caused by the change of the combustion condition in the furnace, thereby affecting the combustion condition of the ignited pilot burner.

[0025] As Figure 1 shown, the main burner nozzle 1 is a long cylindrical structure, the main burner nozzle combustion ports 12 are circumferentially arranged at the top of the main burner nozzle 1, and the main burner nozzle combustion ports 12 are located inside the flame stabilizing protection cover 3.

[0026] In an embodiment of the present invention, by designing the main burner nozzle 1 into a long cylindrical structure, the corresponding lamp main body 21 is also a long cylindrical structure. Thus, it is convenient to realize that after the air and the pilot burner fuel gas enter from the mixing main body 22, they can be fully mixed in the relatively long lamp main body 21 and be ignited from the top of the lamp main body 21. Specifically, the main burner nozzle combustion port 12 and the top end of the lamp main body 21 are both located inside the flame stabilizing protection cover 3.

[0027] Specifically, a mixing air duct 211 is provided along the axial direction in the middle of the lamp main body 21. The central axis of the mixing air duct 211 is arranged to coincide with the central axis of the main burner nozzle 1. The top end of the lamp main body 21 is conical, and an upper gas nozzle 212 communicating with the mixing air duct 211 is provided on the top surface of the conical lamp main body 21.

[0028] In an embodiment of the present invention, the mixing air duct 211 in the middle of the lamp body 21 and the main burner 1 are designed to be centrosymmetric. Thus, after the upper gas nozzle 212 at the top of the lamp body 21 is ignited, the main burner fuel gas ejected from the main burner combustion port 12 at the top of the main burner 1 can be evenly burned around it. Specifically, the pilot fuel gas and air enter through the mixing body 22 and are mixed in the mixing air duct 211. And they are ejected from the upper gas nozzle 212 on the side of the conical structure at the top of the lamp body 21 to be ignited, and the main burner fuel ejected from the main burner combustion port 12 at the top of the main burner 1 is burned.

[0029] Further, the mixing body 22 includes: an air chamber seat 221, which is installed at one end of the main burner 1 away from the flame stabilizing and protecting cover 3, and a vacuum chamber 222 is provided in the air chamber seat 221; a pilot fuel gas injection throat pipe 223, which is installed on the air chamber seat 221, and a lower gas nozzle 2233 is provided at one end of the pilot fuel gas injection throat pipe 223, and the pilot fuel gas injection throat pipe 223 passes through the side wall of the air chamber seat 221 so that the lower gas nozzle 2233 is arranged in the vacuum chamber 222; and a control valve assembly 224, which is installed on one side of the air chamber seat 221 to control the air to be introduced into the vacuum chamber 222.

[0030] In an embodiment of the present invention, when the mixing body 22 injects air and pilot fuel gas simultaneously, the control valve assembly 224 is used to control the amount of air introduced into the vacuum chamber 222 on one side of the air chamber seat 221. At the same time, the pilot fuel gas is introduced through the pilot fuel gas injection throat pipe 223, so that the pilot fuel gas is sprayed into the vacuum chamber 222 through the lower gas nozzle 2233 of the pilot fuel gas injection throat pipe 223. And the air is carried by the pilot fuel gas with a higher flow rate from the vacuum chamber 222 to the mixing air duct 211 for mixing and then ejected from the upper gas nozzle 212 at the top of the lamp body 21 to be ignited.

[0031] Furthermore, a pilot fuel gas duct 2231 is provided in the middle of the pilot fuel gas injection throat pipe 223 along its axial direction. The pilot fuel gas interface 2232 of the pilot fuel gas injection throat pipe 223 is located directly below the air chamber seat 221, and the central axis of the pilot fuel gas duct 2231 communicating with the pilot fuel gas interface 2232 coincides with the central axis of the mixing air duct 211.

[0032] In an embodiment of the present invention, when the pilot fuel gas injection throat pipe 223 inputs pilot fuel gas into the vacuum chamber 222, the pilot fuel gas is connected through the pilot fuel gas interface 2232. The pilot fuel gas enters the pilot fuel gas channel 2231 and is ejected into the vacuum chamber 222 through the lower gas nozzle 2233 at the top of the pilot fuel gas channel 2231. At the same time, the control valve assembly 224 introduces air into the vacuum chamber 222. Through the air flow pushing force of the pilot fuel gas, the pilot fuel gas and air are mixed in the mixing channel 211 and ejected and ignited through the upper gas nozzle 212 at the top of the lamp body 21.

[0033] Preferably, the cross-sectional area size of the vacuum chamber 222 in its radial direction is larger than the cross-sectional area size of the mixing channel 211 in its radial direction. The larger-diameter vacuum chamber 222 facilitates increasing the contact area between the pilot fuel gas entering the vacuum chamber 222 from the lower gas nozzle 2233 and the air entering from one side of the gas chamber seat 221, and then enters the smaller-diameter mixing channel 211 and is gradually mixed along the axial direction of the mixing channel 211.

[0034] Specifically, the control valve assembly 224 includes: an air suction pipeline 2241, and the air suction pipeline 2241 is connected to one side of the gas chamber seat 221; and a control valve 2242, and the control valve 2242 is installed on the air suction pipeline 2241 to control the amount of air introduced into the vacuum chamber 222.

[0035] In an embodiment of the present invention, during the process of the control valve assembly 224 controlling the air to enter the vacuum chamber, the control valve 2242 such as a flow control valve is used to control the flow rate of the air entering the vacuum chamber 222 through the air suction pipeline 2241, so as to ensure that the pilot fuel gas can be mixed with sufficient oxygen and be ejected and ignited at the upper gas nozzle 212 at the top of the lamp body 21.

[0036] As Figure 1 and 2 shown, the flame stabilizing protection cover 3 includes: a cover body 31, and the cover body 31 is a hollow horn shape with a continuously increasing radial dimension from bottom to top. The lower end of the cover body 31 is connected to the top edge of the main burner 1, and an outlet 32 is provided at the top of the cover body 31; a stabilizing bracket 34, and the stabilizing bracket 34 is installed at the top of the flame stabilizing protection cover 3 corresponding to the outlet 32, and an installation position is provided in the middle of the stabilizing bracket 34; and a pilot ring 33, and the pilot ring 33 is installed at the installation position of the stabilizing bracket 34. The center of the pilot ring 33 corresponds to the center of the outlet 32. The pilot ring 33 is located at the outer flame of the combustion of the main burner 1, and the gas ejection direction of the upper gas nozzle 212 corresponds to the pilot ring 33.

[0037] In one embodiment of the present invention, the flame stabilization shield 3 protects the pilot lamp assembly 2 and the main burner 1 during ignition and combustion by installing a hollow, trumpet-shaped shield 31 on top of the main burner 1. The main burner burner port 12 at the top of the main burner 1 is positioned inside the shield 31, thereby protecting the main burner fuel gas ejected from the main burner burner port 12 from combustion. An outlet 32 is provided at the top of the shield 31 to accommodate the installation of a stabilization bracket 34, and an ignition ring 33 is mounted at the center of the stabilization bracket 34. Specifically, this center position meets the following conditions: the outer flame of the main burner 1 during combustion can fall onto the ignition ring 33; and the pilot lamp fuel gas ejection direction of the upper gas nozzle 212 corresponds to the ignition ring 33. In other words, the oblique side surface of the lamp body 21 corresponding to the upper gas nozzle 212 is tangent to the ignition ring 33 in the normal direction of the upper gas nozzle 212.

[0038] Furthermore, a plurality of ventilation micro-holes are arranged on the surface of the cover body 31 so that the inside and the outside communicate with each other.

[0039] In one embodiment of the present invention, by providing small ventilation holes, i.e., ventilation micropores, on the cover 31 disposed on the top periphery of the main burner 1, it is possible to prevent a large amount of cold air from rushing into the protective cover and taking away heat, thereby causing a sharp drop in temperature and causing the pilot light to go out.

[0040] The present invention also provides a heating furnace comprising the aforementioned integrated burner structure.

[0041] See also Figure 1In a preferred embodiment, when the burner structure of the present invention is in operation, the pilot lamp assembly 2 and the main burner 1 utilize separate fuel gas supply systems. Pilot lamp fuel gas is ejected at a high velocity from the pilot lamp fuel gas injection throat 223, creating a negative pressure within the vacuum chamber 222. Control valve 2242 controls the flow of air from the air intake line 2241 into the vacuum chamber 222. Air then enters the mixing gas duct 211 of the main burner body 21 along with the pilot lamp fuel gas. After thorough mixing of the pilot lamp fuel gas and air within the mixing gas duct 211, the pilot lamp fuel gas is ignited by the upper gas nozzle 212. Control valve 2242 controls the amount of air intake to ensure an appropriate ratio of pilot lamp fuel gas and air for easy ignition. The ignition ring 33 is located within the outer flame of the main burner 1, and the ignition ring 33 at the top of the pilot lamp is tangent to the pilot lamp combustion hole. During normal combustion in the heating furnace, the ignition ring 33 maintains a relatively high temperature. When the main burner 1 and the pilot lamp assembly 2 are extinguished simultaneously, the pilot lamp assembly 2 becomes a separate fuel gas supply system. After the pilot lamp fuel gas injection pipe 223, the vacuum chamber 222, and the control valve 2242 control the air entering the vacuum chamber 222 and the mixing gas passage 211, the pilot lamp fuel gas and air are properly proportioned. The pilot lamp fuel gas and air mixture ejected from the upper gas nozzle 212 is instantly ignited by the ignition ring 33. Simultaneously, the upper gas nozzle 212 is positioned away from the main burner combustion port 12 to prevent a large amount of fuel gas from instantly accumulating around the corresponding upper gas nozzle 212 of the pilot lamp assembly 2, which could cause the ignited pilot lamp assembly 2 to burn incompletely and extinguish. The flame stabilization shield 3 is used to prevent changes in the furnace combustion conditions from causing rapid changes in the negative pressure within the furnace, which could affect the combustion conditions of the ignited pilot lamp assembly 2. At the same time, the hood 31 around the top of the main burner 1 is designed with tiny ventilation holes to prevent a large amount of cold air from rushing into the protective cover, dissipating heat and causing a sharp drop in temperature that could cause the pilot light to extinguish. The ignited pilot light burns stably, creating a negative pressure at the top of the flame-stabilizing protective cover 3. Air drawn in through the ventilation holes mixes with the main burner fuel gas from the main burner's combustion port 12, and is ignited by the burning pilot light flame, restoring the furnace to normal operation.

[0042] See also Figure 2 In a preferred embodiment, a stabilizing bracket 34 is installed at the top of the flame stabilizing shield 3, i.e., the top of the shield body 31. This stabilizing bracket 34 comprises an outer ring bracket mounted on the top edge of the shield body 31, an inner ring bracket for mounting the ignition ring 33, and an intermediate bracket connecting the outer and inner ring brackets. This allows the ignition ring 33 to be mounted on the inner ring bracket.

[0043] In summary, in the present invention, the main burner 1 and the pilot burner device 2 are integrated, and by installing the pilot burner device 2 at the central position of the main burner 1, both the main burner 1 and the pilot burner device 2 can adopt separate fuel gas supply systems, so as to solve the problems that after the main burner of the burner is extinguished, the pilot burner is also extinguished immediately, resulting in the shutdown of the heating furnace and the flash explosion of the gas enrichment in the furnace. That is, when the heating furnace fluctuates, once the main burner 1 is extinguished, the ignition operation can be carried out by means of the pilot burner device 2 to prevent flash explosion in the furnace. Specifically, the pilot burner fuel gas is transported at a relatively high flow rate from the pilot burner fuel gas injection throat 223 into the vacuum chamber 222. At the same time, the control valve assembly 224 controls the amount of air entering the vacuum chamber, so as to realize that the pilot burner fuel gas and air reach the top of the pilot burner device 2 through the mixing air duct 211 in an appropriate ratio and are ignited. The main burner fuel gas is introduced into the main burner 1 from the main burner fuel gas interface 11 and ejected from the main burner combustion port 12 to be ignited by the ignited pilot burner, so that the heating furnace returns to normal. By arranging the top end of the lamp body 21 above the main burner combustion port 12, it is possible to prevent a large amount of fuel gas from being enriched around the pilot burner combustion holes instantaneously, resulting in insufficient combustion and extinction of the ignited pilot burner. Moreover, the flame stabilizing protection cover 3 can prevent the influence of the sudden change of the negative pressure in the furnace on the combustion condition of the ignited pilot burner due to the change of the combustion condition in the furnace. At the same time, a number of small ventilation micropores are designed on the cover body 31 on the outer periphery of the top of the main burner 1, which can prevent a large amount of cold air from rushing into the cover and taking away heat, thereby causing a sharp drop in temperature and resulting in the extinction of the pilot burner. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0044] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An integrated burner structure, characterized in that, Comprising: A main burner (1), the main burner (1) having a cavity structure, a main burner fuel gas interface (11) communicated with its cavity being provided on one side of the main burner (1), and a main burner combustion port (12) being provided on the top of the main burner (1); A pilot burner device (2), the pilot burner device (2) including a lamp body (21) and a mixing body (22) connected to one end of the lamp body (21), the lamp body (21) being inserted into the main burner (1), and the top of the lamp body (21) protruding from the top of the main burner (1), and the mixing body (22) connected to the lower end of the lamp body (21) being installed below the main burner (1); And A flame stabilizing protection cover (3), the flame stabilizing protection cover (3) being sleeved on the top of the main burner (1) to cover the outside of the top of the lamp body (21); Wherein, a mixing air passage (211) is provided in the middle of the lamp body (21) along its axial direction, and the central axis of the mixing air passage (211) is arranged to coincide with the central axis of the main burner (1); The mixing body (22) includes: An air chamber seat (221), the air chamber seat (221) being installed at one end of the main burner (1) away from the flame stabilizing protection cover (3), a vacuum chamber (222) being provided in the air chamber seat (221), the cross-sectional area size of the vacuum chamber (222) in its radial direction being larger than the cross-sectional area size of the mixing air passage (211) in its radial direction, so that the pilot burner fuel gas and air increase the contact area in the vacuum chamber (222) with a larger diameter, and then enter the mixing air passage (211) with a smaller diameter, and are gradually mixed along the axial direction of the mixing air passage (211); A pilot burner fuel gas injection throat tube (223), the pilot burner fuel gas injection throat tube (223) being installed on the air chamber seat (221); a pilot burner fuel gas passage (2231) arranged along its axial direction is provided in the middle of the pilot burner fuel gas injection throat tube (223).

2. The integrated burner structure according to claim 1, wherein: The main burner (1) has a long cylindrical structure, the main burner combustion ports (12) are circumferentially arranged on the top of the main burner (1), and the main burner combustion ports (12) are located inside the flame stabilizing protection cover (3).

3. The integrated burner structure according to claim 1, characterized in that: The top end of the lamp body (21) is conical, and an upper gas nozzle (212) communicated with the mixing air passage (211) is provided on the top surface of the conical lamp body (21).

4. The integrated burner structure according to claim 3, wherein: One end of the pilot burner fuel gas injection throat tube (223) is provided with a lower gas nozzle (2233), and the pilot burner fuel gas injection throat tube (223) passes through the side wall of the air chamber seat (221) so that the lower gas nozzle (2233) is arranged in the vacuum chamber (222); The mixing body (22) further includes: A control valve assembly (224), the control valve assembly (224) being installed on one side of the air chamber seat (221) to control the air to be introduced into the vacuum chamber (222).

5. The integrated burner structure according to claim 4, characterized in that: The pilot fuel gas injection throat tube (223) has a pilot fuel gas interface (2232) located directly below the gas chamber seat (221), and the central axis of the pilot fuel gas passage (2231) connected to the pilot fuel gas interface (2232) coincides with the central axis of the mixing passage (211).

6. The integrated burner structure according to claim 4, characterized in that: The control valve assembly (224) includes: An air intake pipeline (2241) that is connected to one side of the gas chamber seat (221); and A control valve (2242) installed on the air intake pipeline (2241) to control the amount of air introduced into the vacuum chamber (222).

7. The integrated burner structure according to claim 3, wherein: The flame stabilizing and protecting cover (3) includes: A cover body (31) that is a hollow horn shape with a continuously increasing radial dimension from bottom to top. The lower end of the cover body (31) is connected to the top edge of the main burner (1), and the top of the cover body (31) is provided with an outlet (32); A stabilizing bracket (34) installed at the top of the flame stabilizing and protecting cover (3) corresponding to the outlet (32). There is an installation position in the middle of the stabilizing bracket (34); and A pilot ring (33) installed at the installation position of the stabilizing bracket (34). The center of the pilot ring (33) corresponds to the center of the outlet (32). The pilot ring (33) is located at the outer flame of the combustion of the main burner (1), and the gas injection direction of the upper gas nozzle (212) corresponds to the pilot ring (33).

8. The integrated burner structure according to claim 7, characterized in that: The surface of the cover body (31) is provided with a number of ventilation micropores that communicate its inside and outside.

9. A heating furnace, characterized in that: Comprising the integrated burner structure according to any one of claims 1 - 8.

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