A multi-stage mixed gas burner

Abstract

The application discloses a multi-stage mixed gas burner and relates to the technical field of burners.The multi-stage mixed gas burner comprises an air pipe, a tail cover, a mixed compression pipe, a wind distribution disc, a combustion port, an ignition device and a detection electrode; a gas shunt is arranged in the air pipe and the mixed compression pipe; the gas shunt comprises a gas pipe connected with a gas connecting pipe on the inner side of the tail cover, a nozzle arranged at the end of the gas pipe, gas flow guide pipes symmetrically arranged at the front of the gas pipe and located on the two sides of the nozzle and a gas compression pipe sleeved with the inner hole of the wind distribution disc; the wind distribution disc is in the shape of a ring and is internally provided with a chamber; the outer side of the wind distribution disc is connected with the pipe opening of the combustion port; and the first connecting hole and the second connecting hole on the inner side of the wind distribution disc are both connected with the internal chamber of the wind distribution disc.The multi-stage mixed gas burner is simple in structure, can make the gas fully burn through the multi-stage premixing structure, save energy and reduce the emission of nitrogen oxides, carbon monoxide and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of burners, in particular to a multi-stage mixed gas burner. BACKGROUND

[0002] A burner is a device that makes fuel and air spray mixed combustion in a certain way, and burners are divided into industrial burners, combustion machines, civil burners, special burners, etc. according to types and application fields. The material of the burner is mostly made of corrosion-resistant and high-temperature-resistant materials such as stainless steel or titanium. The function of the burner is to atomize the pattern by flame combustion. The atomized test solution enters the burner, and under the action of flame temperature and flame atmosphere, it undergoes drying, melting, evaporation, and dissociation processes to produce a large number of ground-state atoms and some excited-state atoms, ions, and molecules. A good burner should have high atomization efficiency, low noise, and stable flame performance to ensure high absorption sensitivity and measurement density.

[0003] The existing ordinary gas burner adopts a single-stage mixing method, and the specific structure adopts a single tubular shell, an air distribution disc is arranged inside, an air inlet at one end of the shell is connected to an external air source and passes through the air distribution disc, a gas interface is connected to an external gas source, a gas pipe is connected, and under the action of a detection electrode and an ignition device at the end of the tubular shell, the gas and air are diffused and combusted at the front end of the tubular shell. It is found through research that the diffusion combustion of the existing single-stage mixing method burner is not very sufficient, the excess air coefficient is large, which leads to waste of gas energy and high emission, and the air pollution is more serious. SUMMARY

[0004] The present application provides a multi-stage mixed gas burner, which solves the above problems.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme:

[0006] The multi-stage mixed gas burner of the present application comprises an air pipe with an air chamber, a tail cover installed at one end of the air pipe, a mixed compression pipe installed at the other end of the air pipe, an air distribution disc installed at the front end position in the mixed compression pipe, a combustion port with an outer flame gas hole located at the outer side of the air distribution disc, an ignition device and a detection electrode extending into the mixed compression pipe from the tail cover and corresponding to two first connecting holes respectively opened in the inner side of the air distribution disc; the air pipe is provided with a pressure measuring hole and an air inlet pipe, and the tail cover is provided with a gas interface and a gas connection pipe connected with the gas interface;

[0007] The air pipe and the mixed compression pipe are provided with a gas shunt, which comprises a gas pipe connected with the gas connecting pipe on the inner side of the tail cover, a nozzle arranged at the end of the gas pipe, gas flow guide pipes symmetrically arranged at the front of the gas pipe and located on both sides of the nozzle, and a gas compression pipe sleeved with the inner hole of the air distribution disc; the combustion port is arranged at the outer end of the gas compression pipe and located between the compression ring arranged at the outer end of the mixed compression pipe and the air distribution disc; the end of the gas flow guide pipe is connected with the second connecting hole arranged on the inner side surface of the air distribution disc;

[0008] The air distribution disc is in the shape of a ring and internally provided with a chamber, and the outer side surface is connected with the pipe opening of the combustion port; the first connecting hole and the second connecting hole on the inner side surface of the air distribution disc are both connected with the internal chamber of the air distribution disc; the outer peripheral side wall of the air distribution disc is attached to and fixed with the inner peripheral side wall of the mixed compression pipe, and the air outlet holes connected with the outside are uniformly arranged around the positions other than the first connecting hole and the second connecting hole.

[0009] The inner end of the gas compression pipe is provided with a compression cup structure with a gradually decreasing caliber towards the air distribution disc, and the nozzle gas outlet hole is located in the compression cup structure; the outer peripheral side position of the gas compression pipe between the compression cup structure and the air distribution disc is provided with air-gas mixing holes; the cavity formed between the inner wall of the mixed compression pipe and the outer wall of the gas compression pipe is connected with the gas outlet hole; the air-gas mixing port is formed between the gas outlet hole and the inner wall of the mixed compression pipe towards the compression ring.

[0010] Further, one end of the air pipe connected with the mixed compression pipe is in the shape of a necked opening, the outer diameter of the inner end of the mixed compression pipe is consistent with the inner diameter of the necked opening, and the two are sleeved and matched.

[0011] Further, the end surface of the air pipe connected with the mixed compression pipe is provided with a first flange, the end surface of the mixed compression pipe connected with the air pipe is provided with a second flange, the outer end surface of the first flange is provided with an annular groove compatible with the outer contour of the second flange and consistent in depth with the thickness of the second flange, and the third flange sleeved at the connection position of the air pipe and the mixed compression pipe is used to fixedly connect the two.

[0012] Further, the third flange is provided with two circles of flange holes corresponding to the first flange and the second flange respectively.

[0013] Further, the nozzle is located at a position close to the air pipe and the mixed compression pipe.

[0014] Further, the end of the tail cover is provided with a fourth flange, and the end of the air pipe connected with the tail cover is provided with a fifth flange matched with the fourth flange.

[0015] Further, the combustion port is located between the outer end of the mixed compression pipe and the compression ring to form a gas mixing port.

[0016] The present application includes the following advantages over the prior art:

[0017] The multi-stage mixed gas burner of the present application has simple structure, fully burns the gas through the multi-stage premixing structure, saves energy, and reduces the emission of nitrogen oxides and carbon monoxide.

[0018] Of course, implementing any product of the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 Fig. 1 is a perspective view of the overall structure of a multi-stage mixed gas burner of the present application;

[0021] Figure 2 Fig. 2 is a perspective view of the structure of the middle tail cover of the multi-stage mixed gas burner of the present application; Figure 1 Fig. 3 is a side view of the structure of the middle tail cover of the multi-stage mixed gas burner of the present application;

[0022] Figure 3 Fig. 4 is a front view of the structure of the middle tail cover of the multi-stage mixed gas burner of the present application; Figure 2 Fig. 5 is a top view of the structure of the middle tail cover of the multi-stage mixed gas burner of the present application;

[0023] Figure 4 Fig. 6 is a perspective view of the structure of the hollow air pipe of the multi-stage mixed gas burner of the present application; Figure 2 Fig. 7 is a side view of the structure of the hollow air pipe of the multi-stage mixed gas burner of the present application;

[0024] Figure 5 Fig. 8 is a front view of the structure of the hollow air pipe of the multi-stage mixed gas burner of the present application; Figure 2 Fig. 9 is a top view of the structure of the hollow air pipe of the multi-stage mixed gas burner of the present application;

[0025] Figure 6 Fig. 10 is a perspective view of the structure of the mixed compression pipe of the multi-stage mixed gas burner of the present application; Figure 2 Fig. 11 is a side view of the structure of the mixed compression pipe of the multi-stage mixed gas burner of the present application;

[0026] Figure 7 Fig. 12 is a front view of the structure of the mixed compression pipe of the multi-stage mixed gas burner of the present application; Figure 2 Fig. 13 is a top view of the structure of the mixed compression pipe of the multi-stage mixed gas burner of the present application;

[0027] Figure 8 Fig. 14 is a perspective view of the structure of the gas compression pipe of the multi-stage mixed gas burner of the present application;

[0028] Figure 9 Fig. 15 is a sectional view of the structure of the gas compression pipe of the multi-stage mixed gas burner of the present application; Figure 1 Fig. 16 is a side view of the structure of the gas compression pipe of the multi-stage mixed gas burner of the present application;

[0029] Figure 10 Fig. 17 is a front view of the structure of the gas compression pipe of the multi-stage mixed gas burner of the present application; Figure 9 Fig. 18 is a top view of the structure of the gas compression pipe of the multi-stage mixed gas burner of the present application;

[0030] Figure 11 Fig. 2 is a structural side view of the gas pipe and the gas guide pipe combined structure of the present application; Figure 1

[0031] Figure 12 Fig. 3 is a structural side view of the gas pipe and the gas guide pipe combined structure of the present application; Figure 11

[0032] Figure 13 Fig. 4 is a structural right view of the gas pipe and the gas guide pipe combined structure of the present application; Figure 11

[0033] Figure 14 Fig. 5 is a structural front view of the third flange of the present application;

[0034] Figure 15 Fig. 6 is a structural side view of the air distribution disc and the combustion port combined structure of the present application; Figure 1

[0035] Figure 16 Fig. 7 is a structural side view of the air distribution disc of the present application; Figure 1

[0036] Figure 17 Fig. 8 is a live picture of the flame of the multi-stage mixed gas burner of the present application in the combustion state;

[0037] Figure 18 Fig. 9 is a structural cross-sectional view of an existing burner;

[0038] Figure 19 Fig. 10 is a structural cross-sectional view of another existing burner;

[0039] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0040] 1-gas guide pipe, 2-compression cup structure, 3-air-gas mixing hole, 4-gas compression pipe, 5-combustion port, 501-outer flame gas hole, 6-mixed compression pipe, 601-compression ring, 602-second flange, 7-nozzle, 8-air inlet pipe, 9-tail cover, 901-fourth flange, 902-gas interface, 903-gas connecting pipe, 10-pressure measuring hole, 11-air pipe, 1103-first flange, 1104-converging structure, 1105-annular groove, 12-gas pipe, 13-gas mixing port, 14-air-gas mixing port, 15-air distribution disc, 1501-second connecting hole, 1502-first connecting hole, 1503-gas outlet hole, 16-third flange. DETAILED DESCRIPTION

[0041] ​​​​​Clearly, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] In the description of the present application, it should be understood that the terms "one end", "the other end", "inner", "front end", "outer side", "inner side", "outer end", "outer" indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0043] The existing burner, as shown in Figure 18 and 19 , both use single-stage mixing to realize gas combustion, specifically including a tubular burner shell, an air inlet is arranged on the shell, and a gas interface is installed through the air distribution disc, ignition is realized by the detection electrode and the ignition device at the air distribution disc position to realize the work of the gas, and an air cylinder is arranged between the air distribution disc and the outer end of the shell to increase the mixing of air and gas. However, through research, it is found that there are three main reaction mechanisms of nitrogen monoxide NO in the combustion system: thermal NO, prompt NO, and fuel NO. When the flame temperature is lower than 1800K, the proportion of thermal NO is very small, the reaction rate is slower than the combustion rate, and it usually occurs in the flue gas zone behind the flame front; the prompt NO is formed near the flame surface, and the generation amount increases with the increase of the mixing equivalence ratio, when the mixing equivalence ratio is greater than 1.2, the chemical reaction becomes more complex, the generation rate of NO is limited, and NO is also reduced to HCN, thereby preventing the generation of NO. Moreover, the generation rate of nitrogen oxides is the highest when the mixing equivalence ratio is close to 1, and when deviating from 1, whether it is fuel-rich or fuel-lean, the generation rate of NO shows a downward trend. The burners of the two existing technical solutions given above obviously have the problems of insufficient combustion and relatively large excess air coefficient. Therefore, in view of the above problems, the present technical solution provides the following technical solution:

[0044] Please refer to Figures 1-7As shown, the multi-stage mixed gas burner of the present application has a whole structure made of stainless steel material, an air pipe 11 with an air chamber, a tail cover 9 installed at one end of the air pipe 11, a mixed compression pipe 6 installed at the other end of the air pipe 11, an air distribution disc 15 installed at a front end position in the mixed compression pipe 6, a combustion port 5 with outer flame gas holes 501 located at the outer side of the air distribution disc 15, an ignition device and a detection electrode which are extended into the mixed compression pipe 6 from the tail cover 9 and correspond to two first connecting holes 1502 respectively opened in the inner side of the air distribution disc 15; the air pipe 11 is provided with a pressure measuring hole 10 and an air inlet pipe 8, the tail cover 9 is provided with a gas interface 902 and a gas connecting pipe 903 connected with the gas interface 902; in this embodiment, the ignition device adopts an FS10 type ignition rod, and the detection electrode adopts an imported QRA4 type flame detector or detector;

[0045] The air pipe 11 and the mixed compression pipe 6 are installed with a gas flow divider, which includes a gas pipe 12 connected with the gas connecting pipe 903 in the inner side of the tail cover 9, a nozzle 7 provided at an end of the gas pipe 12, gas flow guide pipes 1 symmetrically provided at the front part of the gas pipe 12 and located at both sides of the nozzle 7, and a gas compression pipe 4 connected with the inner hole of the air distribution disc 15; the combustion port 5 is installed at the outer end of the gas compression pipe 4 and located between the compression ring 601 provided at the outer end of the mixed compression pipe 6 and the air distribution disc 15; the end of the gas flow guide pipe 1 is connected with the second connecting hole 1501 opened in the inner side surface of the air distribution disc 15; since the gas pressure through the gas pipe 12 is large, the front end of the nozzle 7 is of a converging structure, and the gas flow guide pipes 1 provided at both sides of the rear part of the nozzle 7 can obtain a certain flow division, which is similar to the principle of realizing flow division of water flow by opening holes at both sides of a water pipe;

[0046] The air distribution disc 15 is in a circular ring shape and has a cavity in the inside, and the outer side surface is connected with the pipe opening of the combustion port 5, the first connecting hole 1502 and the second connecting hole 1501 in the inner side surface of the air distribution disc 15 are both connected with the internal cavity of the air distribution disc 15; the outer peripheral side wall of the air distribution disc 15 is in close contact with the inner peripheral side wall of the mixed compression pipe 6 and is fixed, and the gas outlet holes 1503 connected with the outside are evenly and circumferentially opened at positions other than the first connecting hole 1502 and the second connecting hole 1501;

[0047] The end of the gas compression pipe 4 is provided with a compression cup structure 2 with a gradually decreasing caliber towards the air distribution disc 15, and the nozzle 7 is located in the compression cup structure 2; the outer peripheral side of the gas compression pipe 4 between the compression cup structure 2 and the air distribution disc 15 is provided with air mixing holes 3; the cavity formed between the inner wall of the mixed compression pipe 6 and the outer wall of the gas compression pipe 4 is connected with the air outlet hole 1503; the air-fuel mixing port 14 is formed between the air outlet hole 1503 and the inner wall of the mixed compression pipe 6 towards the compression ring 601; during the forward movement of the gas in the gas compression pipe 4, the air outside the air mixing hole 3 is sucked in for mixing, so that the air mixing hole 3 is used for air mixing.

[0048] The end of the air pipe 11 connected with the mixed compression pipe 6 is a necked structure 1104, the outer diameter of the inner end of the mixed compression pipe 6 is consistent with the inner diameter of the necked structure 1104, and the two are fitted together.

[0049] The end surface of the air pipe 11 connected with the mixed compression pipe 6 is provided with a first flange 1103, and the end surface of the mixed compression pipe 6 connected with the air pipe 11 is provided with a second flange 602, the outer end surface of the first flange 1103 is provided with an annular groove 1105 compatible with the outer contour of the second flange 602 and consistent with the thickness of the second flange 602, and the third flange 16 is sleeved on the connection position of the air pipe 11 and the mixed compression pipe 6 to fixedly connect the two.

[0050] The third flange 16 is provided with two rows of flange holes corresponding to the first flange 1103 and the second flange 602 respectively.

[0051] The nozzle 7 is located at a position close to the front of the air pipe 11 and the mixed compression pipe 6.

[0052] The end of the tail cover 9 is provided with a fourth flange 901, and the end of the air pipe 11 connected with the tail cover 9 is provided with a fifth flange 1106 matched with the fourth flange 901.

[0053] The combustion port 5, the outer end of the mixed compression pipe 6 and the compression ring 601 form a gas mixing port 13.

[0054] The main flame temperature of the multi-stage mixed gas burner provided by the embodiment can reach 1200-1600K, which is lower than the environment required for forming thermal NO, thereby reducing the generation of NO. (Reduction of the formation of thermal NO) The inner flame gas passes through the gas holes of the nozzle 7, and before reaching the combustion zone, passes through the structure gas guide pipe 1, the nozzle 7, and the gas pipe 12 to be fully and uniformly mixed with air in advance, and the mixing equivalence ratio is 0.7≤Φ≤0.75. The burner can realize uniform combustion, the overall mixing equivalence ratio of the combustion system is close to 1, the excess air coefficient is low, the oxygen content of the tail gas is lower than 3%, the generation rate and opportunity of NO are reduced. (Prevent the generation and emission of prompt NO and fuel NO); the residence time of the mixed gas in the high-temperature zone can be reduced, the flame injection speed can be increased, the gas flow speed can be increased, the time of the mixed gas passing through the high-temperature zone can be reduced, and the generation amount of NO can be reduced.

[0055] As shown in Figure 17 The flame is gradient combustion and is divided into three intervals, and the burner is designed to supply a ratio of 8:2. The first interval is the inner flame, the fuel-lean flame, the equivalence ratio is 0.7≤Φ≤0.75, the flame injection speed is the fastest, wτ>250m / s; the second interval is the outer flame, the fuel-rich flame, the equivalence ratio is 1.3≥Φ≥1.25, which plays a role in stabilizing the flame, 200m / s<w1<250m / s; the third interval is the mixed flame, the inner flame speed is greater than the outer flame speed, a negative pressure area is formed on the surface of the inner flame according to the Bernoulli principle to attract the outer flame, and the mixed combustion continues in the rear part of the flame front. Since the overall equivalence ratio is controlled to be close to the theoretical value, the flame efficiency is the highest, close to the complete combustion state, the flame speed and rate are greater than those of the first and second intervals, the flame flow speed is increased, thereby increasing the tail gas circulation, and the above-mentioned effects of energy saving and low nitrogen emission are achieved.

[0056] The working principle of the technical solution is:

[0057] By setting the gas flow divider composed of gas guide pipe 1, nozzle 7 and gas pipe 12 inside the inner core of the burner, the inner flame gas and the outer flame gas are divided, and the division ratio is 4.6:10 in this embodiment. The outer flame is ignited first by the plasma ignition rod as the ignition device, that is, the gas input to the air distribution disc 15 and the combustion port 5 position is ignited first, and then the inner flame is ignited by the outer flame. The inner flame is generated by the gas input to the air distribution disc 15 and the combustion port 5 of the gas compression pipe 4. The outer flame gas directly passes through the outer flame gas hole 501 at the combustion port 5, which can stabilize the flame and also prevent the flame from backfiring. The main flame gas is first mixed with air at the compression cup structure 2 position, and then mixed with air at the air mixing hole 3 position, so that the main gas and air are fully mixed before reaching the combustion position. The outer flame gas hole 501 and the air distribution disc 15 for the third air distribution are arranged at the front end of the inner core of the burner. The air distribution disc 15 is provided with two second connecting holes 1501 for connecting and installing the ion detection and ignition device in addition to the air distribution port. The ratio of the third air distribution is calculated and experimented, so that the gas and air are fully mixed and burned, and the air-fuel ratio is close to 1:10 (the ratio changes synchronously according to the composition of the gas). The air and gas burn quickly in the combustion, and the oxygen content of the tail gas is low. Compared with the existing traditional burner, the effect of low-nitrogen energy saving is remarkable, and the energy saving is about 15%, the nitrogen oxide emission is less than 30ppm, and is basically controlled at about 10ppm, which is far lower than the national standard.

[0058] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The embodiments are selected and described in detail in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. A multi-stage mixed gas burner, comprising an air pipe (11) with an air chamber, a tail cover (9) installed at one end of the air pipe (11), a mixing compression pipe (6) installed at the other end of the air pipe (11), an air distribution disc (15) installed at a front end position in the mixing compression pipe (6), a combustion port (5) with outer flame gas holes (501) located at the outer side of the air distribution disc (15), an ignition device and a detection electrode which are extended into the mixing compression pipe (6) from the tail cover (9) and correspond to two first connecting holes (1502) respectively opened in the inner side of the air distribution disc (15); the air pipe (11) is provided with a pressure measuring hole (10) and an air inlet pipe (8), the tail cover (9) is provided with a gas interface (902) and a gas connecting pipe (903) connected with the gas interface (902), characterized in that: a gas flow divider is installed in the air pipe (11) and the mixing compression pipe (6), the gas flow divider comprises a gas pipe (12) connected with the gas connecting pipe (903) in the inner side of the tail cover (9), a nozzle (7) provided at the end of the gas pipe (12), gas flow guide pipes (1) symmetrically provided at the front of the gas pipe (12) and located on both sides of the nozzle (7), and a gas compression pipe (4) sleeved with the inner hole of the air distribution disc (15); the combustion port (5) is installed at the outer end of the gas compression pipe (4) and located between the compression ring (601) provided at the outer end of the mixing compression pipe (6) and the air distribution disc (15); the end of the gas flow guide pipe (1) is connected with the second connecting hole (1501) opened in the inner side surface of the air distribution disc (15). The air distribution disc (15) is a circular ring and has an inner chamber, the outer side surface is connected with the pipe opening of the combustion port (5), the first connecting hole (1502) and the second connecting hole (1501) in the inner side surface of the air distribution disc (15) are connected with the inner chamber of the air distribution disc (15), the outer peripheral side wall of the air distribution disc (15) is matched with the inner peripheral side wall of the mixing compression pipe (6) and is fixed, the air outlet holes (1503) connected with the outside are evenly and circularly opened at positions other than the first connecting hole (1502) and the second connecting hole (1501). The inner end of the gas compression pipe (4) is provided with a compression cup structure (2) with a gradually decreasing caliber towards the air distribution disc (15), and the gas outlet hole of the nozzle (7) is located in the compression cup structure (2); the air-gas mixing holes (3) are circularly opened at the outer peripheral side position between the compression cup structure (2) and the air distribution disc (15); the cavity formed between the inner wall of the mixing compression pipe (6) and the outer wall of the gas compression pipe (4) is connected with the air outlet hole (1503); the air-fuel mixing port (14) is formed between the air outlet hole (1503) and the inner wall of the mixing compression pipe (6) towards the compression ring (601). The connected end of the air pipe (11) and the mixing compression pipe (6) is a necked structure (1104), the outer diameter of the inner end of the mixing compression pipe (6) is consistent with the inner diameter of the necked structure (1104), and the two are sleeved and matched. ​ The first flange (1103) is arranged on the end surface of the air pipe (11) connected with the mixed compression pipe (6), the second flange (602) is arranged on the end surface of the mixed compression pipe (6) connected with the air pipe (11), the outer end surface of the first flange (1103) is provided with an annular groove (1105) which is compatible with the outer contour of the second flange (602) and has the same depth as the thickness of the second flange (602), and the third flange (16) is sleeved on the air pipe (11) and the mixed compression pipe (6) to fixedly connect them. The third flange (16) is provided with two flange holes corresponding to the first flange (1103) and the second flange (602) respectively.

2. A multi-stage hybrid gas burner according to claim 1, characterized in that The nozzle (7) is arranged at a position close to the front end of the air pipe (11) and the mixed compression pipe (6).

3. A multi-stage hybrid gas burner according to claim 1, characterized in that, The fourth flange (901) is arranged at the end of the tail cover (9), and the end of the air pipe (11) connected with the tail cover (9) is provided with the fifth flange (1106) matched with the fourth flange (901).

4. A multi-stage hybrid gas burner according to claim 1, characterized in that, The combustion port (5), the outer end of the mixed compression pipe (6) and the compression ring (601) form a gas mixing port (13).

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