Premixing type combustor

Abstract

The invention relates to the technical field of combustors, and discloses a premixing type combustor which comprises a shell barrel, an air compressor and a combustion chamber, the air compressor and the combustion chamber are sequentially arranged in the shell barrel from left to right, the air compressor introduces air from an air inlet in the end of the shell barrel to be mixed into the combustion chamber, the air inlet is communicated with a hydrogen adding disc, and the bottom of the hydrogen adding disc is connected with an air adding pipe; a rotating disc is movably connected into the hydrogen adding disc and communicated with the outside, under high-speed air flow suction force of the air inlet, the rotating disc rotates vertically along the suction force to suck outside air, multi-stage vortexes used for mixing are generated in the hydrogen adding disc, and mixed gas faces the gas compressor along the suction force. The corrosion problem caused by hydrogen mixing is solved, the internal space of the hydrogen adding disc is divided through the rotating disc, a multi-stage vortex mixing chamber used for linkage matching is formed in the hydrogen adding disc and the rotating disc, vortex mixing, vortex suction, vortex mixing throwing and lateral vortex mixing are conducted on mixed gas in the disc, and the hydrogen adding disc is formed. And the pre-mixing treatment work is skillfully and effectively completed.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a premixed burner. Background Art

[0002] Burner is a general term for devices that spray fuel and air in a certain way to mix and burn. Common ones include gas turbines, which use continuous flow of gas as the working medium to drive the impeller to rotate at high speed, converting the energy of the fuel into useful work. It is a rotary impeller heat engine. At present, clean and efficient new low-nitrogen oxide combustion technology of the gas turbine is an important development direction.

[0003] Conventional gas turbines use natural gas and other fuels. Blending hydrogen into natural gas can significantly reduce carbon emissions during the combustion process. However, hydrogen is highly corrosive to metal materials and sealing materials. How to effectively pre-mix it in the front section of the combustion chamber remains a problem to be solved.

[0004] To this end, the authors proposed a premixed burner to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a premixing burner to improve the corrosion problem of hydrogen mixing, and through a multi-stage vortex mixing chamber that cooperates with each other, the mixed gas in the disk is subjected to vortex mixing, swirl absorption, vortex mixing and sprinkling, and side mixing vortex, so as to cleverly and effectively complete the premixing processing work and solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a premixed burner, comprising a shell, a compressor and a combustion chamber arranged in sequence from left to right in the shell, the compressor introduces air from an air inlet at the end of the shell and mixes it into the combustion chamber, the air inlet is connected to a hydrogen adding disk, the bottom of the hydrogen adding disk is connected to an air adding pipe, the hydrogen adding disk is movably connected to a rotating disk, the rotating disk is connected to the outside world, under the suction of the high-speed air flow at the air inlet, the rotating disk rotates vertically along the suction to absorb external air, and multi-stage vortices for mixing are generated in the hydrogen adding disk, and the mixed gas moves toward the compressor along the suction.

[0007] As an optional solution of the premixing burner described in 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 solution of the premixing 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 through a pin shaft; A plurality of blades are arranged at equal intervals in a circular pattern on the edge of the rotating disk with the rotating axis as the reference; The hydrogen adding disk is connected to the outside of the shell through a connecting pipe, the connecting pipe is connected to the air inlet, and the fan blade drives the rotating disk to rotate under the suction of the connecting pipe.

[0009] As an optional solution of the premixing burner described in the present invention, the rotating disk is hollow to form a mixing chamber 2, and an air intake port connected to the mixing cavity is opened on the side of the mixing chamber 2 away from the pin shaft, and the inner diameter of the air intake port is smaller than the inner diameter of the mixing chamber 2.

[0010] As an optional solution of the premixing burner described in the present invention, a plurality of exhaust holes connected to the mixing chamber are opened at the edge of the rotating disk, and the exhaust holes are located between two adjacent fan blades.

[0011] As an optional solution of the premixed burner described in the present invention, the end of the hydrogen adding disk close to the air intake port is convex, and an air outlet connecting the mixing chamber and the outside is opened in the cone, and the inner diameter of the air outlet is smaller than the inner diameter of the mixing chamber 2.

[0012] As an optional solution of the premixing burner described in the present invention, a mixing chamber 1 is formed between the air inlet and the air intake port, and the bottom of the mixing chamber 1 is connected to the air supply pipe.

[0013] As an optional solution of the premixing burner described in the present invention, a one-way air valve is installed on the air outlet, and the outside air enters the mixing chamber one along the air outlet in a one-way manner.

[0014] As an optional solution of the premixing burner described in the present invention, there is a gap between the side of the rotating disk away from the mixing chamber one and the inner wall of the mixing chamber to form a mixing chamber three.

[0015] As an optional solution of the premixed burner described in the present invention, the width of the pipe opening of the connecting pipe includes the wide mixing chamber three, and the edge of the connecting pipe close to the mixing chamber one does not exceed the position of the fan blade.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The premixed burner uses the suction force of the high-speed air flowing in the shell and the mechanical energy to drive the rotating disk in the hydrogen adding disk to rotate, sucking the outside air and the hydrogen discharged from the filling pipe for premixing. The separately arranged hydrogen adding disk is resistant to hydrogen corrosion. The mixed and diluted gas enters the shell and is sent to the combustion chamber through the compressor to mix with other fuels for combustion, thereby improving the corrosion problem of hydrogen mixing in the process. 2. The premixing burner divides the internal space of the hydrogen adding disk by a rotating disk, and forms a multi-stage vortex mixing chamber for linkage coordination inside the hydrogen adding disk and the rotating disk, which performs vortex mixing, vortex absorption, vortex mixing and sprinkling, and side mixing vortex on the mixed gas in the disk, and completes the premixing process ingeniously and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial cross-sectional schematic diagram of the main structure of the present invention; Figure 2 This is a schematic cross-sectional structure diagram of the hydrogen adding tray of the present invention; Figure 3 It is a side view structural schematic diagram of the hydrogen adding plate of the present invention; Figure 4 It is a right side cross-sectional structural schematic diagram of the hydrogen adding tray of the present invention; Figure 5 It is a schematic diagram of the side cross-sectional structure of the hydrogen adding tray of the present invention.

[0018] In the figure: 1. shell; 2. compressor; 3. air inlet; 4. combustion chamber; 5. hydrogen adding plate; 6. mixing chamber; 7. air adding pipe; 8. air vent; 9. rotating disk; 10. mixing chamber 2; 11. air intake; 12. mixing chamber 1; 13. exhaust hole; 14. fan blade; 15. pin shaft; 16. connecting pipe; 17. mixing chamber 3. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 5 The present invention provides a technical solution: a premixed burner, comprising a shell 1, a compressor 2 and a combustion chamber 4 arranged in the shell 1 from left to right, the compressor 2 introduces air from an air inlet 3 at the end of the shell 1 and mixes it into the combustion chamber 4, and the high-speed flowing gas generated by the combustion converts kinetic energy into rotational mechanical energy through a turbine for driving external equipment.

[0021] It should be noted that the above are conventional structures of gas turbines, which are all existing technologies and will not be described in detail.

[0022] Pre-mix work instructions for this application: The air inlet 3 is connected to a hydrogen adding plate 5 which is resistant to hydrogen corrosion and is made of a common titanium alloy. A mixing chamber 6 is formed inside the hydrogen adding plate 5, and a gas adding pipe 7 is connected to the bottom of the mixing chamber 6. The gas adding pipe 7 is used to input hydrogen into the mixing chamber 6. A rotating disk 9 is movably connected inside the mixing chamber 6. The rotating disk 9 is connected to the outside world. Under the high-speed air flow suction of the air inlet 3, the rotating disk 9 rotates vertically along the suction to absorb the outside air, and a multi-stage vortex for mixing is generated in the hydrogen adding plate 5. The mixed gas moves toward the compressor 2 along the suction, and is sent to the combustion chamber through the compressor to mix with other fuels for combustion.

[0023] Specifically, the turntable 9 is circular or regular polygonal, and the center of one side of the turntable 9 is rotatably connected to the inner wall of the mixing chamber 6 through a pin 15; A plurality of blades 14 are arranged at equal intervals in a ring shape around the edge of the rotating disk 9 with the rotating axis as a reference; The hydrogen adding disk 5 is connected to the outside of the shell 1 through a connecting pipe 16 , and the connecting pipe 16 is connected to the air inlet 3 . The annularly arranged fan blades 14 drive the rotating disk 9 to rotate under the suction force of the connecting pipe 16 .

[0024] The turntable 9 rotates with the pin 15 as the center. When the turntable body is a circle or a regular polygon, the center of rotation is stable and not unbalanced, and the force rotation efficiency is high.

[0025] That is, the rotating disc 9 and the fan blades 14 stir the interior of the hydrogen adding disc 5, and the sucked air and hydrogen are mixed.

[0026] In order to complete the mixing work efficiently, the multi-stage vortex is described as follows: One end of the hydrogen adding disk 5 is convex and close to the rotating disk 9. The cone is provided with an air inlet 8 connecting the mixing chamber 6 with the outside and the air inlet 3. A mixing chamber 12 is formed between the air inlet 8 and the rotating disk 9, and the bottom of the mixing chamber 12 is connected to the air adding pipe 7.

[0027] Under the strong suction force from the air inlet 3, the outside air is sucked into the mixing chamber 12 through the smaller caliber gusher 8. In the process of air entering the mixing chamber 12, the internal caliber gradually increases, the sucked air gradually expands outward, and is assisted by the stirring of the rotary disk 9. After impacting the inner wall of the mixing chamber 6 and the end face of the rotary disk 9, the air is chaotic to form a vortex, and gradually stabilizes under the continuous influx of air. The air filling pipe 7 at the bottom of the mixing chamber 12 delivers hydrogen gas into the mixing chamber 12, which surges upward at the delivery pressure. The air that surges in through the gusher 8 is impacted and dispersed positively, and the initial mixing work begins under the vortex.

[0028] Furthermore, the rotating disk 9 is hollow inside to form a mixing chamber 2 10, and a suction port 11 connected to the mixing chamber 1 12 is provided on the side of the mixing chamber 2 10 away from the pin 15, and the inner diameter of the suction port 11 is smaller than the inner diameter of the mixing chamber 2 10. The inner diameter of the air inlet 8 is smaller than the inner diameter of the mixing chamber 2 10, and the larger opening facilitates the influx of gas.

[0029] After the hydrogen is mixed in the vortex in the mixing chamber 12, the mixed gas enters the mixing chamber 2 10 through the air inlet 11. Since the inner diameter of the air inlet 11 is smaller than the inner diameter of the mixing chamber 2 10, the vortex is formed again in the same way as above, and the swirl absorption is performed, and the secondary mixing is performed in the mixing chamber 2 10.

[0030] Furthermore, a plurality of exhaust holes 13 connected to the mixing chamber 6 are provided at the edge of the rotating disk 9 , and the exhaust holes 13 are located between two adjacent blades 14 .

[0031] That is, the gas in the mixing chamber 2 10 is ejected under the centrifugal force of the rotating disk 9.

[0032] In the present application, the rotary disk 9 with the fan blades 14 acts like an electric fan, sucking in and blowing out air from one side. In this embodiment, the wind direction is from the air inlet 8 to the other side of the rotary disk 9, subject to the basic condition that the outside air is sucked into the combustion chamber 4.

[0033] Under the combined suction of the air inlet 3 and the fan blades 14, part of the mixed gas in the mixing chamber 12 flows toward the connecting pipe 16 through the fan blades 14, and the mixed gas mixed and scattered by the mixing chamber 2 10 also flows toward the connecting pipe 16 along the flow path attracted by the air. The mixed gases in different directions impact and mix with each other, and then flow together through the connecting pipe 16 into the shell 1.

[0034] In this embodiment, a one-way air valve is installed on the air gushing port 8 to allow the outside air to enter the mixing chamber 12 along the air gushing port 8 in a one-way manner, thereby preventing the hydrogen from being accidentally discharged and improving the stability of the mixed air flow channel.

[0035] As a further improvement of this embodiment, a gap is left between the side of the rotating disk 9 away from the mixing chamber 12 and the inner wall of the mixing chamber 6 to form the mixing chamber 3 17. In addition, the width of the pipe opening of the connecting pipe 16 includes the width of the mixing chamber 3 17, and the edge of the connecting pipe 16 close to the mixing chamber 12 does not exceed the position of the fan blade 14.

[0036] That is, the mixed gas in the two flow channels of mixing chamber 2 10 in mixing chamber 1 12 will flow into mixing chamber 3 17, allowing the mixed gases in different directions to have enough space to impact and mix with each other, and then be sucked away by connecting pipe 16. The sucked mixed diluted gas enters the shell cylinder 1, and is sent to the combustion chamber 4 through compressor 2 to be mixed with other fuels for combustion. The high-speed flowing gas generated by the combustion converts kinetic energy into rotational mechanical energy through the turbine, which is used to drive external equipment.

[0037] The corrosion problem of hydrogen mixing is improved in the process, and the mixed gas in the disk is subjected to vortex mixing, swirl absorption, vortex mixing and sprinkling, and side mixing vortex through the coordinated multi-stage vortex mixing chamber, completing the pre-mixing process ingeniously and effectively.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A premixed burner, comprising a shell (1), a compressor (2) and a combustion chamber (4) arranged in the shell (1) from left to right, wherein the compressor (2) introduces air from an air inlet (3) at the end of the shell (1) and mixes the air into the combustion chamber (4), characterized in that: The air inlet (3) is connected to a hydrogen adding plate (5) which is resistant to hydrogen corrosion. The bottom of the hydrogen adding plate (5) is connected to an air adding pipe (7). The hydrogen adding plate (5) is movably connected to a rotating plate (9). The rotating plate (9) is connected to the outside. Under the suction force of the high-speed air flow at the air inlet (3), the rotating plate (9) rotates vertically along the suction force to absorb the outside air, and a multi-stage vortex for mixing is generated in the hydrogen adding plate (5). The mixed gas moves toward the compressor (2) along the suction force.

2. A premix burner according to claim 1, characterized in that: The rotating disk (9) is circular or regular polygonal and is arranged in a mixing chamber (6) formed inside the hydrogen adding disk (5).

3. A premix burner according to claim 2, characterized in that: The center of one side of the rotating disk (9) is rotatably connected to the inner wall of the mixing chamber (6) via a pin shaft (15); A plurality of blades (14) are arranged at equal intervals in a ring shape around the edge of the rotating disk (9) with the rotating axis as a reference; The hydrogen adding disk (5) is connected to the outside of the shell (1) via a connecting pipe (16), the connecting pipe (16) is connected to the air inlet (3), and the fan blades (14) drive the rotating disk (9) to rotate under the suction force of the connecting pipe (16).

4. A premix burner according to claim 3, characterized in that: The rotating disk (9) is hollow inside to form a second mixing chamber (10). A suction port (11) communicating with the mixing chamber (6) is provided on a side of the second mixing chamber (10) away from the pin shaft (15). The inner diameter of the suction port (11) is smaller than the inner diameter of the second mixing chamber (10).

5. A premix burner according to claim 4, characterized in that: The edge of the rotating disk (9) is provided with a plurality of exhaust holes (13) connected to the mixing chamber (6), and the exhaust holes (13) are located between two adjacent fan blades (14).

6. A premix burner according to claim 5, characterized in that: The end of the hydrogen adding disk (5) close to the air inlet (11) is convex, and an air inlet (8) connecting the mixing chamber (6) and the outside is provided at the cone, and the inner diameter of the air inlet (8) is smaller than the inner diameter of the second mixing chamber (10).

7. A premix burner according to claim 6, characterized in that: A mixing chamber (12) is formed between the air inlet (8) and the air inlet (11), and the bottom of the mixing chamber (12) is connected to the air supply pipe (7).

8. A premix burner according to claim 7, characterized in that: A one-way air valve is installed on the air gushing port (8), and outside air enters the mixing chamber 1 (12) in a one-way manner along the air gushing port (8).

9. A premix burner according to claim 8, characterized in that: A gap is left between a side surface of the rotating disk (9) away from the mixing chamber one (12) and an inner wall surface of the mixing cavity (6), thereby forming a mixing chamber three (17).

10. A premix burner according to claim 9, characterized in that: The width of the opening of the connecting pipe (16) includes the width of the third mixing chamber (17), and the edge of the connecting pipe (16) close to the first mixing chamber (12) does not exceed the position of the fan blade (14).

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