A premix burner

Abstract

This invention relates to the field of burner technology and discloses a premixed burner, comprising a shell, a compressor, and a combustion chamber arranged sequentially from left to right within the shell. Air is introduced into the combustion chamber from an inlet at the end of the shell and mixed with the air. A hydrogen-adding disc is connected to the inlet, and a gas-adding pipe is connected to the bottom of the disc. A rotating disk is movably connected within the disc, and the disk is connected to the outside. Under the suction force of the high-speed airflow at the inlet, the disk rotates vertically along the suction direction to draw in outside air, generating a multi-stage vortex for mixing within the disc. The mixed gas moves towards the compressor along the suction force. This invention improves the corrosion problem of hydrogen mixing and, by dividing the internal space of the hydrogen-adding disc with a rotating disk, forms a multi-stage vortex mixing chamber for coordinated operation within the disc and the rotating disk. This chamber performs vortex mixing, vortex suction, vortex mixing and spraying, and lateral mixing vortexes on the mixed gas within the disc, cleverly and effectively completing the premixing process.

Description

Technical Field

[0001] This invention relates to the field of burner technology, specifically to a premixed burner. Background Technology

[0002] A burner is a general term for a device that sprays fuel and air in a specific manner for combustion. A common example is a gas turbine, which is an internal combustion engine that uses a continuously flowing gas as the working fluid to drive a high-speed rotating impeller, converting the energy of the fuel into useful work. Currently, clean and efficient new low-NOx combustion technologies for gas turbines represent an important direction for development.

[0003] Conventional gas turbines use natural gas and other fuels. Blending natural gas with hydrogen can significantly reduce carbon emissions during combustion. However, hydrogen is highly corrosive to metal and sealing materials. How to effectively premix the gas in the front of the combustion chamber remains an unsolved problem.

[0004] To address these issues, the author proposes a premixed burner. Summary of the Invention

[0005] The purpose of this invention is to provide a premixed burner that improves the corrosion problem of hydrogen mixing. Through a multi-stage vortex mixing chamber with linkage, the mixed gas in the disc is subjected to vortex mixing, swirling absorption, vortex mixing and scattering, and lateral mixing vortex, which ingeniously and effectively completes the premixing process to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a premixed burner, comprising a shell, a compressor and a combustion chamber arranged sequentially from left to right within the shell, wherein the compressor introduces air from an inlet at the end of the shell and mixes it into the combustion chamber, a hydrogen filling plate is connected to the inlet, a gas filling pipe is connected to the bottom of the hydrogen filling plate, a rotating disk is movably connected inside the hydrogen filling plate, the rotating disk is connected to the outside, under the suction force of the high-speed airflow at the inlet, the rotating disk rotates vertically along the suction force to draw in outside air, generating a multi-stage vortex for mixing within the hydrogen filling plate, and the mixed gas is directed towards the compressor along the suction force.

[0007] As an alternative to the premixed burner of the present invention, the rotating disk is circular or regular polygonal and is arranged in the mixing chamber formed inside the hydrogen-adding disk.

[0008] As an optional embodiment of the premixed burner of the present invention, wherein: the center of one side of the rotating disk is rotatably connected to the inner wall of the mixing chamber via a pin;

[0009] Several fan blades are arranged in a ring at equal intervals along the edge of the rotating disk, with the axis of rotation as the reference.

[0010] The hydrogen filling disc is connected to the outside of the shell through a connecting pipe, which is connected to the air inlet. The fan blades drive the disc to rotate under the suction of the connecting pipe.

[0011] As an optional embodiment of the premixed burner of the present invention, wherein: the rotating disk is hollow to form a second mixing chamber, and an air intake port communicating with the mixing chamber is opened on the side of the second mixing chamber away from the pin shaft, and the inner diameter of the air intake port is smaller than the inner diameter of the second mixing chamber.

[0012] As an alternative embodiment of the premixed burner of the present invention, the rotating disk has several exhaust holes that connect to the mixing chamber on its edge, and the exhaust holes are located between two adjacent fan blades.

[0013] As an optional embodiment of the premixed burner of the present invention, the end of the hydrogen filling disc near the intake port is convex, and an air inlet is provided in the cone portion to connect the mixing chamber and the outside. The inner diameter of the air inlet is smaller than the inner diameter of the second mixing chamber.

[0014] As an alternative to the premixed burner of the present invention, a mixing chamber is formed between the air inlet and the air intake, and the bottom of the mixing chamber is connected to the air filling pipe.

[0015] As an optional embodiment of the premixed burner of the present invention, a one-way air valve is installed on the air inlet, and outside air enters the mixing chamber one in one direction along the air inlet.

[0016] As an alternative embodiment of the premixed burner of the present invention, a gap is left between the side of the rotary disc away from the mixing chamber one and the inner wall of the mixing chamber to form the mixing chamber three.

[0017] As an optional embodiment of the premixed burner of the present invention, wherein: the width of the connecting pipe opening includes a wide mixing chamber three, and the edge of the connecting pipe near the mixing chamber one does not exceed the position of the fan blade.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This premixed burner uses the suction force of high-speed air flow inside the shell to drive the rotation of the disc inside the hydrogen filling plate, which draws in the outside air and hydrogen discharged from the filling pipe for premixing. The separately arranged hydrogen filling plate is resistant to hydrogen corrosion. The mixed and diluted gas enters the shell and is sent to the combustion chamber by the compressor to mix with other fuels for combustion. In the process, the corrosion problem of hydrogen mixing is improved.

[0020] 2. This premixed burner divides the internal space of the hydrogen filling plate by a rotating disc, forming a multi-stage vortex mixing chamber for linkage and coordination within the hydrogen filling plate and the rotating disc. It performs vortex mixing, vortex absorption, vortex mixing and scattering, and lateral mixing vortex on the mixed gas in the plate, thus cleverly and effectively completing the premixing process. Attached Figure Description

[0021] Figure 1 This is a partial cross-sectional view of the main structure of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the hydrogen filling disk of the present invention;

[0023] Figure 3 This is a side view of the hydrogen filling disk of the present invention.

[0024] Figure 4 This is a schematic diagram of the right-side cross-sectional structure of the hydrogen filling disk of the present invention;

[0025] Figure 5 This is a side cross-sectional view of the hydrogen filling disk of the present invention.

[0026] In the diagram: 1. Shell; 2. Compressor; 3. Inlet; 4. Combustion chamber; 5. Hydrogen filling plate; 6. Mixing chamber; 7. Inlet pipe; 8. Air inlet; 9. Rotary disc; 10. Mixing chamber two; 11. Inlet; 12. Mixing chamber one; 13. Exhaust port; 14. Fan blade; 15. Pin; 16. Connecting pipe; 17. Mixing chamber three. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-5 The present invention provides a technical solution: a premixed burner, including a shell 1, a compressor 2 and a combustion chamber 4 arranged sequentially from left to right inside the shell 1. The compressor 2 introduces air from the air inlet 3 at the end of the shell 1 and mixes it into the combustion chamber 4. The high-speed flowing gas generated by combustion converts kinetic energy into rotational mechanical energy through a turbine for driving external equipment.

[0029] It should be noted that the above are the conventional structures of gas turbines, all of which are existing technologies and will not be elaborated further.

[0030] Premixing working description of this application:

[0031] The air inlet 3 is connected to a hydrogen filling disc 5, which is resistant to hydrogen corrosion and is made of a common titanium alloy. A mixing chamber 6 is formed inside the hydrogen filling disc 5. A gas filling pipe 7 is connected to the bottom of the mixing chamber 6 for inputting hydrogen into the mixing chamber 6. A rotating disc 9 is movably connected within the mixing chamber 6, and the disc 9 is connected to the outside. Under the suction force of the high-speed airflow from the air inlet 3, the disc 9 rotates vertically along the suction direction to draw in outside air, generating a multi-stage vortex for mixing within the hydrogen filling disc 5. The mixed gas moves along the suction direction towards the compressor 2, and is then sent to the combustion chamber by the compressor to mix with other fuels for combustion.

[0032] Specifically, the rotating disk 9 is circular or a regular polygon, and the center of one side of the rotating disk 9 is rotatably connected to the inner wall of the mixing chamber 6 through the pin 15;

[0033] Several fan blades 14 are arranged in a ring at equal intervals along the edge of the rotating disk 9 with the axis of rotation as the reference.

[0034] The hydrogen filling disk 5 is connected to the outside of the shell 1 through the connecting pipe 16, which is connected to the air inlet 3. The annularly arranged fan blades 14 drive the rotating disk 9 to rotate under the suction of the connecting pipe 16.

[0035] Among them, the rotating disk 9 rotates around the pin 15. When the disk body is circular or regular polygonal, the rotation center is stable and unbalanced, and the rotation efficiency is high.

[0036] That is, the rotating disc 9 and fan blades 14 agitate the inside of the hydrogen-adding disc 5, and the drawn-in air and hydrogen are mixed.

[0037] To efficiently complete the mixing process, the multi-stage eddy current is explained as follows:

[0038] One end of the hydrogen filling disc 5 is convex and close to the rotary disc 9. An air inlet 8 is provided in the conical part to connect the mixing chamber 6 and the outside, and also to the air inlet 3. A mixing chamber 12 is formed between the air inlet 8 and the rotary disc 9, and the bottom of the mixing chamber 12 is connected to the gas filling pipe 7.

[0039] Under the strong suction of inlet 3, outside air is drawn into mixing chamber 12 through the smaller diameter air inlet 8. As the air enters mixing chamber 12, the internal diameter gradually increases, and the drawn-in air gradually expands outward. With the assistance of agitation by rotating disc 9, the air impacts the inner wall of mixing chamber 6 and the end face of rotating disc 9, causing the air to become turbulent and form a vortex. Under the continuous influx of air, the air gradually stabilizes. Hydrogen is introduced through gas filling pipe 7 at the bottom of mixing chamber 12. Under the pressure of the supplied gas, it surges upward and is directly impacted and dispersed by the air flowing in through air inlet 8, initiating the initial mixing process under the vortex.

[0040] Furthermore, a second mixing chamber 10 is formed inside the hollow rotating disk 9. An air intake 11, which connects to the first mixing chamber 12, is opened on the side of the second mixing chamber 10 away from the pin 15. The inner diameter of the air intake 11 is smaller than the inner diameter of the second mixing chamber 10. The inner diameter of the air inlet 8 is smaller than the inner diameter of the second mixing chamber 10, and the larger opening facilitates the inflow of gas.

[0041] After the hydrogen is mixed in the vortex in the mixing chamber 12, the mixed gas enters the mixing chamber 2 10 through the suction port 11. Since the inner diameter of the suction port 11 is smaller than the inner diameter of the mixing chamber 2 10, the same principle applies, and a vortex is formed again for swirling suction, resulting in secondary mixing in the mixing chamber 2 10.

[0042] Furthermore, the edge of the rotary disk 9 is provided with several exhaust holes 13 that connect to the mixing chamber 6, and the exhaust holes 13 are located between two adjacent fan blades 14.

[0043] That is, the gas in the mixing chamber 2 10 is thrown out by the centrifugal force of the rotating disk 9.

[0044] In this application, the rotary disc 9 with blades 14 acts like an electric fan, drawing in and blowing air from one side. In this embodiment, the airflow direction is from the air inlet 8 towards the other side of the rotary disc 9, conforming to the basic condition of drawing in outside air into the combustion chamber 4.

[0045] Under the combined suction of the air inlet 3 and the fan blade 14, part of the mixed gas in the mixing chamber 12 flows through the fan blade 14 to the connecting pipe 16, and the mixed gas mixed and sprayed in the mixing chamber 2 also flows down the air suction channel to the connecting pipe 16. The mixed gases in different directions collide and mix with each other, and flow together through the connecting pipe 16 into the shell 1.

[0046] In this embodiment, a one-way valve is installed on the air inlet 8 to allow outside air to enter the mixing chamber 12 in one direction along the air inlet 8, thereby preventing accidental exhaust of hydrogen and improving the stability of the mixed air flow channel.

[0047] As a further improvement to this embodiment, a gap is left between the side of the rotary disk 9 away from the mixing chamber 12 and the inner wall of the mixing cavity 6 to form a mixing chamber 3 17. Furthermore, the width of the opening of the connecting pipe 16 includes the mixing chamber 3 17, and the edge of the connecting pipe 16 near the mixing chamber 12 does not exceed the position of the fan blade 14.

[0048] That is, the mixed gas from the two channels of mixing chamber 10 in mixing chamber 12 will flow into mixing chamber 3 17, so that the mixed gas with different directions has enough space to impact and mix with each other. Then it is drawn away by connecting pipe 16. The drawn mixed and diluted gas enters shell 1, and is sent to combustion chamber 4 by compressor 2 to mix with other fuels for combustion. The high-speed flowing gas generated by combustion converts kinetic energy into rotational mechanical energy through turbine, which is used to drive external equipment.

[0049] The process improves the corrosion problem of hydrogen mixing, and through the coordinated multi-stage vortex mixing chamber, the mixed gas in the disk is subjected to vortex mixing, swirling absorption, vortex mixing and spraying, and lateral mixing vortex, which ingeniously and effectively completes the premixing treatment.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A premixed burner, comprising a casing (1), a compressor (2) and a combustion chamber (4) arranged sequentially from left to right within the casing (1), wherein the compressor (2) introduces air from an air inlet (3) at the end of the casing (1) and mixes it into the combustion chamber (4), characterized in that: The inlet (3) is connected to a hydrogen filling plate (5) that is protected against hydrogen corrosion. The bottom of the hydrogen filling plate (5) is connected to a gas filling pipe (7). A rotating disk (9) is movably connected inside the hydrogen filling plate (5). The rotating disk (9) is connected to the outside. Under the suction force of the high-speed air flow at the inlet (3), the rotating disk (9) rotates vertically along the suction force to draw in outside air. A multi-stage vortex for mixing is generated inside the hydrogen filling plate (5). The mixed gas moves towards the compressor (2) along the suction force. The rotating disk (9) is circular or regular polygonal and is arranged in the mixing cavity (6) formed inside the hydrogenation disk (5); The center of one side of the rotary disk (9) is rotatably connected to the inner wall of the mixing chamber (6) via a pin (15); Several fan blades (14) are arranged in a ring at equal intervals along the edge of the rotating disk (9) with the axis of rotation as the reference. The hydrogen filling disk (5) is connected to the outside of the shell (1) through the connecting pipe (16), and the connecting pipe (16) is connected to the air inlet (3). The fan blade (14) drives the rotating disk (9) to rotate under the suction of the connecting pipe (16). The rotating disk (9) is hollow to form a mixing chamber two (10). An air intake (11) communicating with the mixing chamber (6) is opened on the side of the mixing chamber two (10) away from the pin (15). The inner diameter of the air intake (11) is smaller than the inner diameter of the mixing chamber two (10). The rotating disk (9) has several exhaust holes (13) connected to the mixing chamber (6) along its edge, and the exhaust holes (13) are located between two adjacent fan blades (14). The end of the hydrogen filling disk (5) near the air intake (11) is convex, and an air inlet (8) is provided in the cone to connect the mixing chamber (6) and the outside. The inner diameter of the air inlet (8) is smaller than the inner diameter of the mixing chamber (10). A mixing chamber (12) is formed between the air inlet (8) and the air intake (11), and the bottom of the mixing chamber (12) is connected to the air supply pipe (7). A gap is left between the side of the rotary disk (9) away from the mixing chamber one (12) and the inner wall of the mixing cavity (6) to form the mixing chamber three (17).

2. A premixed burner according to claim 1, characterized in that: A one-way air valve is installed on the air inlet (8), and outside air enters the mixing chamber (12) in one direction along the air inlet (8).

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