Hydrogen and natural gas dual purpose burner

Abstract

The utility model discloses a hydrogen and natural gas dual-purpose burner, specifically relates to the field of burners, including a combustion box and a fixed pipe fixed on one side of the combustion box, one end of the fixed pipe extends to the inside of the combustion box and is fixedly connected to a gas collecting pipe through a plurality of connecting blocks, a heat conducting block is arranged on the side of the inner cavity of the combustion box away from the fixed pipe, and a return gas groove and a guide groove are arranged on both sides of the inner cavity of the combustion box. The utility model firstly rotates the spiral plate arranged, and the gas is input to the other side through the vent hole and gathered through the delivery hole, and dispersed through the porous plate, so as to improve the mixing effect of the combustion gas and oxygen, and then improve the combustion effect, and at the same time, through the first flow valve and the electromagnetic three-way valve, it is convenient to control the delivery amount of the fuel gas, and conveniently control the delivery position of the oxygen, and conveniently control the use, and through the cooperation of the return gas groove and the guide groove with the return gas hole, it is convenient to circulate and mix the unburned gas, and improve the use effect.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, and more specifically, to a hydrogen and natural gas dual-purpose burner. Background Art

[0002] Hydrogen energy is a clean and environmentally friendly fuel that can replace petroleum. The calorific value of hydrogen gas after combustion is higher than that of fossil fuels. Hydrogen does not produce any pollutants after combustion. All emission indicators meet or exceed national environmental protection requirements. It is an ideal combustion gas. Natural gas is a low-carbon hydrocarbon mixture mainly composed of methane. It can be divided into dry gas and wet gas according to its composition.

[0003] Burner is a general term for a device that sprays fuel and air in a certain way for mixed combustion. Burners are divided into industrial burners, burners, civil burners, and special burners according to their types and application areas. They are mostly made of corrosion-resistant and high-temperature-resistant materials such as stainless steel or titanium.

[0004] The ultra-low nitrogen burners currently used are generally only suitable for natural gas (or other fuel gases). When a second fuel is added, it cannot meet the multi-fuel switching conditions, or cannot simultaneously meet the low nitrogen emission requirements under the use of two fuels and different loads;

[0005] The Chinese patent application number CN202320952502.9 discloses an ultra-low nitrogen burner for hydrogen / natural gas. Through two sets of gas pipelines, fuel staging, rich and thin combustion, and a small amount of flue gas external circulation (FGR) measures are used to reduce the central flame temperature, ensure the stable combustion of the burner, and ensure stable combustion and ultra-low NOx emissions under the condition of two gases operating separately;

[0006] Then, it can be seen from the drawings in the specification that when hydrogen or natural gas is burned, it is difficult to ensure the mixing effect of hydrogen / natural gas with oxygen when used by directly transporting and automatically mixing through multiple pipelines, which can easily affect the combustion effect. Utility Model Content

[0007] In order to overcome the above defects of the prior art, the utility model provides a hydrogen and natural gas dual-purpose burner to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydrogen and natural gas dual-purpose burner, comprising a combustion box and a fixed pipe fixed to one side of the combustion box, one end of the fixed pipe extending to the inside of the combustion box and fixedly connected to a gas collecting pipe through a plurality of connecting blocks, a heat conducting block is arranged on one side of the inner cavity of the combustion box away from the fixed pipe, and a gas return groove and a guide groove are arranged on both sides of the inner cavity of the combustion box;

[0009] The inner cavity of the gas collecting pipe is fixedly connected with a porous plate, a delivery hole is opened in the middle of one end of the fixed pipe, a fixed plate is fixedly connected in the middle of the fixed pipe, a natural gas delivery pipe is inserted in the middle of one end of the fixed pipe, and a mixing mechanism is arranged on one side of the fixed plate;

[0010] A hydrogen supply pipe, a replenishing pipe and a first oxygen supply pipe are inserted on one side of the fixed pipe. A return air hole is provided at the position of the connecting block between the fixed pipe and the gas collecting pipe. A second oxygen supply pipe and an igniter are provided on one side of the fixed pipe. An electromagnetic three-way valve is provided in the middle of the first oxygen supply pipe.

[0011] Preferably, one side of the air return groove corresponds to the position of the air return hole, and the inner cavity cross-section shape of one side of the air collecting pipe close to the connecting block is set to a trumpet structure and corresponds to one side wall of the air return hole.

[0012] Preferably, one end of the igniter passes through the combustion box and the gas collecting pipe and extends to a side of the porous plate away from the combustion box, and one end of the second oxygen supply pipe passes through the fixing plate and is located on a side of the fixing plate close to the delivery hole.

[0013] Preferably, one end of the hydrogen delivery pipe, the replenishing pipe and the first oxygen delivery pipe all penetrates the wall of the fixed plate and is connected to the cavity of the fixed plate near the delivery hole, and one end of the hydrogen delivery pipe and the replenishing pipe is provided with a first flow valve.

[0014] Preferably, the first oxygen delivery pipe is connected to the second oxygen delivery pipe through an electromagnetic three-way valve, and the natural gas delivery pipe passes through the fixing plate and is connected to the cavity on one side of the fixing plate close to the delivery hole.

[0015] Preferably, the mixing mechanism includes a limiting groove opened in the middle of the inner cavity of the fixed tube, a rotating ring is arranged between the fixed plate and the conveying hole, the outer surface of the rotating ring is fixedly connected to the limiting ring, and the limiting ring is arranged in the middle of the limiting groove.

[0016] Preferably, a spiral plate is fixedly connected to the middle of the rotating ring, a fixed cylinder is fixedly connected to the middle of the spiral plate, a vent hole is opened on the surface of the spiral plate, one end of the fixed cylinder extends to the inside of the natural gas transmission pipe, and the other end corresponds to the transmission hole.

[0017] Technical effects and advantages of the utility model:

[0018] 1. The utility model firstly rotates the spiral plate, and the gas is input to the other side through the vent hole and gathered through the delivery hole, and dispersed through the porous plate, which can improve the mixing effect of the combustion gas and oxygen, thereby improving the combustion effect. At the same time, the first flow valve and the electromagnetic three-way valve can conveniently control the delivery amount of the fuel gas and the delivery position of the oxygen, and conveniently control the use. The cooperation of the return gas groove and the guide groove with the return gas hole can facilitate the circulation and mixing of the unburned gas, thereby improving the use effect.

[0019] 2. The utility model also improves the stability of the rotation of the rotating ring by cooperating with the limiting ring and the limiting groove, and can directly transport the natural gas to the middle of the delivery hole without affecting the natural gas delivery pipe by the fixed cylinder, thereby improving the use effect, and can gather the burning flame through the gas gathering pipe to improve the heat gathering effect, and facilitate the use of heat conduction through the heat conduction block, thereby improving the use effect;

[0020] In summary, through the mutual influence of the above-mentioned multiple effects, the mixing effect of the combustion gas and oxygen can be improved, thereby improving the combustion effect, and at the same time, the unburned gas can be circulated and mixed for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the combustion box of the utility model.

[0023] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model.

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the combustion box and the fixed tube of the utility model.

[0025] Figure 5 It is a schematic diagram of the cross-sectional split structure of the combustion box and the fixed tube of the utility model.

[0026] Figure 6 It is a schematic diagram of the connection structure of the rotating ring and the spiral plate of the utility model.

[0027] The accompanying drawings are marked as follows: 1. combustion box; 2. fixed pipe; 3. heat conductive block; 4. connecting block; 5. gas collecting pipe; 6. porous plate; 7. return air hole; 8. delivery hole; 9. fixed plate; 10. natural gas delivery pipe; 11. hydrogen delivery pipe; 12. replenishing pipe; 13. first oxygen delivery pipe; 14. electromagnetic three-way valve; 15. second oxygen delivery pipe; 16. igniter; 17. return air groove; 18. guide groove; 19. first flow valve; 20. limit groove; 21. rotating ring; 22. limit ring; 23. spiral plate; 24. vent hole; 25. fixed cylinder; 26. second flow valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] As attached Figure 1-6 The hydrogen and natural gas dual-purpose burner shown comprises a combustion box 1 and a fixed pipe 2 fixed to one side of the combustion box 1. One end of the fixed pipe 2 extends to the interior of the combustion box 1 and is fixedly connected to a gas collecting pipe 5 through a plurality of connecting blocks 4, so as to facilitate ignition and fire collection of the transported gas. A heat conducting block 3 is arranged on the side of the inner cavity of the combustion box 1 away from the fixed pipe 2 to achieve heat conduction. A return gas groove 17 and a guide groove 18 are arranged on both sides of the inner cavity of the combustion box 1, so as to facilitate the reflux of unburned gas for secondary combustion.

[0030] The inner cavity of the gas collecting pipe 5 is fixedly connected with a porous plate 6, a delivery hole 8 is opened in the middle of one end of the fixed pipe 2, a fixed plate 9 is fixedly connected in the middle of the fixed pipe 2, a natural gas delivery pipe 10 is inserted in the middle of one end of the fixed pipe 2, and a mixing mechanism is arranged on one side of the fixed plate 9. The porous plate 6 can improve the uniformity of gas dispersion, and the delivery hole 8 facilitates the delivery of gas, and the natural gas delivery pipe 10 facilitates the delivery of natural gas, and the mixing mechanism can mix the delivered hydrogen, ammonia and oxygen;

[0031] A hydrogen delivery pipe 11, a replenishing pipe 12, and a first oxygen delivery pipe 13 are inserted on one side of the fixed pipe 2. A return air hole 7 is provided at the position of the connecting block 4 between the fixed pipe 2 and the gas collecting pipe 5. A second oxygen delivery pipe 15 and an igniter 16 are provided on one side of the fixed pipe 2. An electromagnetic three-way valve 14 is provided in the middle of the first oxygen delivery pipe 13. Hydrogen can be transported through the hydrogen delivery pipe 11, ammonia can be transported through the replenishing pipe 12, oxygen can be transported through the first oxygen delivery pipe 13, and ignition can be performed through the igniter 16. The return air hole 7 facilitates the reflux of unburned gas into the interior of the gas collecting pipe 5 for secondary combustion, thereby improving the combustion effect and facilitating the control of the combustion rate.

[0032] As attached Figure 3-5 As shown, one side of the return air groove 17 corresponds to the position of the return air hole 7, and the cross-sectional shape of the inner cavity on one side of the air collecting pipe 5 close to the connecting block 4 is set to a trumpet structure, and corresponds to one side wall of the return air hole 7. Through the cooperation of the return air groove 17 and the guide groove 18, the unburned gas can be reflowed through the return air hole 7 into the interior of the air collecting pipe 5 for secondary combustion, thereby improving the use effect and facilitating the control of the combustion rate.

[0033] As attached Figure 1-5 As shown, one end of the igniter 16 passes through the combustion box 1 and the gas collecting pipe 5 and extends to the side of the porous plate 6 away from the combustion box 1. One end of the second oxygen supply pipe 15 passes through the fixed plate 9 and is located on the side of the fixed plate 9 close to the delivery hole 8. The igniter 16 is used to facilitate ignition of the gas entering the gas collecting pipe 5. The second oxygen supply pipe 15 can directly deliver oxygen to the side close to the delivery hole 8 to combine with natural gas to improve the combustion effect of natural gas.

[0034] As attached Figure 1 , 3 As shown in Figures 4 and 5, one end of the hydrogen delivery pipe 11, the replenishing pipe 12 and the first oxygen delivery pipe 13 all pass through the wall of the fixed plate 9 and are connected with the cavity of the fixed plate 9 near the delivery hole 8. One end of the hydrogen delivery pipe 11 and the replenishing pipe 12 are provided with a first flow valve 19. The first flow valve 19 is provided to facilitate the control of the amount of oxygen, hydrogen and ammonia delivered, which is convenient for control.

[0035] As attached Figure 3-5 As shown, the first oxygen delivery pipe 13 is connected to the second oxygen delivery pipe 15 through the electromagnetic three-way valve 14, and the natural gas delivery pipe 10 passes through the fixed plate 9 and is connected to the cavity on the side of the fixed plate 9 close to the delivery hole 8. The electromagnetic three-way valve 14 can control the input position of the oxygen delivered by the first oxygen delivery pipe 13, which is convenient for adjustment and use, and the natural gas is delivered through the natural gas delivery pipe 10 to improve the use effect.

[0036] As attached Figure 3 , 6As shown, the mixing mechanism includes a limiting groove 20 opened in the middle part of the inner cavity of the fixed tube 2, a rotating ring 21 is arranged between the fixed plate 9 and the conveying hole 8, and the outer surface of the rotating ring 21 is fixedly connected to the limiting ring 22, and the limiting ring 22 is arranged in the middle part of the limiting groove 20. The rotating ring 21 can improve the stability of the rotation of the spiral plate 23, and the rotation of the rotating ring 21 can be limited by the cooperation of the limiting ring 22 and the limiting groove 20.

[0037] As attached Figure 3 , 6 As shown, a spiral plate 23 is fixedly connected to the middle of the rotating ring 21, and a fixed cylinder 25 is fixedly connected to the middle of the spiral plate 23. A vent 24 is provided on the surface of the spiral plate 23. One end of the fixed cylinder 25 extends to the inside of the natural gas delivery pipe 10, and the other end corresponds to the delivery hole 8. The spiral plate 23 is pushed by the gas to drive the rotating ring 21 to rotate, and part of the gas is delivered to the other end through the vent 24, which facilitates gas mixing, improves the mixing effect, and facilitates the use of hydrogen combustion.

[0038] It is worth noting that a hydraulic valve and an exhaust pipe are provided on one side of the combustion box 1 to facilitate depressurization of the interior of the combustion box 1 .

[0039] Working principle of the utility model: when natural gas is needed for combustion, natural gas is input into the gas collecting pipe 5 through the natural gas delivery pipe 10, and oxygen is directly input into the position of the spiral plate 23 away from the fixed plate 9 through the first oxygen delivery pipe 13, so that the natural gas and oxygen are mixed through the delivery hole 8 and then input into the gas collecting pipe 5 and dispersed through the small holes on the surface of the porous plate 6. At the same time, the natural gas and oxygen in the middle of the gas collecting pipe 5 are ignited by the igniter 16, so that the combustion effect can be achieved, and the heat is extracted through the heat conducting block 3;

[0040] When hydrogen is needed for combustion, hydrogen is input to one side of the fixed plate 9 through the hydrogen pipe 11, and oxygen is input to between the fixed plate 9 and the spiral plate 23 through the hydrogen pipe 11, and ammonia is input to between the fixed plate 9 and the spiral plate 23 through the supplementary pipe 12. The push of the spiral plate 23 by ammonia, hydrogen and oxygen can make the spiral plate 23 drive the rotating ring 21 to rotate. At the same time, the gas is mixed through the diversion of the vent hole 24, and then gathered through the delivery hole 8 and dispersed through the porous plate 6 to further improve the mixing effect. Then, the ammonia, hydrogen and oxygen in the middle of the gas collecting pipe 5 are ignited by the igniter 16 to achieve the combustion effect and improve the use effect.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydrogen and natural gas dual-purpose burner, comprising a combustion box (1) and a fixed pipe (2) fixed to one side of the combustion box (1), characterized in that: One end of the fixed pipe (2) extends to the interior of the combustion box (1) and is fixedly connected to a gas collecting pipe (5) via a plurality of connecting blocks (4); a heat conducting block (3) is provided on a side of the inner cavity of the combustion box (1) away from the fixed pipe (2); and a gas return groove (17) and a guide groove (18) are respectively provided on both sides of the inner cavity of the combustion box (1); The inner cavity of the gas collecting pipe (5) is fixedly connected to a porous plate (6), a delivery hole (8) is opened in the middle of one end of the fixed pipe (2), a fixed plate (9) is fixedly connected in the middle of the fixed pipe (2), a natural gas delivery pipe (10) is inserted in the middle of one end of the fixed pipe (2), and a mixing mechanism is arranged on one side of the fixed plate (9); A hydrogen delivery pipe (11), a replenishing pipe (12), and a first oxygen delivery pipe (13) are inserted into one side of the fixed pipe (2); a gas return hole (7) is provided at a position of the connecting block (4) between the fixed pipe (2) and the gas collecting pipe (5); a second oxygen delivery pipe (15) and an igniter (16) are provided on one side of the fixed pipe (2); and an electromagnetic three-way valve (14) is provided in the middle of the first oxygen delivery pipe (13).

2. The hydrogen and natural gas dual-purpose burner according to claim 1 is characterized in that: One side of the air return groove (17) corresponds to the position of the air return hole (7), and the inner cavity cross-section shape of one side of the air collecting pipe (5) close to the connecting block (4) is set to a trumpet structure and corresponds to a side wall of the air return hole (7).

3. The hydrogen and natural gas dual-purpose burner according to claim 1 is characterized in that: One end of the igniter (16) passes through the combustion box (1) and the gas collecting pipe (5) and extends to the side of the porous plate (6) away from the combustion box (1), and one end of the second oxygen supply pipe (15) passes through the fixed plate (9) and is located on a side of the fixed plate (9) close to the delivery hole (8).

4. The hydrogen and natural gas dual-purpose burner according to claim 1 is characterized in that: One end of the hydrogen delivery pipe (11), the replenishing pipe (12) and the first oxygen delivery pipe (13) all penetrate the wall of the fixed plate (9) and are connected to the cavity of the fixed plate (9) near the delivery hole (8), and one end of the hydrogen delivery pipe (11) and the replenishing pipe (12) are both provided with a first flow valve (19).

5. The hydrogen and natural gas dual-purpose burner according to claim 1 is characterized in that: The first oxygen delivery pipe (13) is connected to the second oxygen delivery pipe (15) via an electromagnetic three-way valve (14), and the natural gas delivery pipe (10) passes through the fixed plate (9) and is connected to a cavity on the fixed plate (9) near the delivery hole (8).

6. The hydrogen and natural gas dual-purpose burner according to claim 1 is characterized in that: The mixing mechanism comprises a limiting groove (20) provided in the middle of the inner cavity of the fixed tube (2); a rotating ring (21) is provided between the fixed plate (9) and the conveying hole (8); the outer surface of the rotating ring (21) is fixedly connected to a limiting ring (22); and the limiting ring (22) is provided in the middle of the limiting groove (20).

7. The hydrogen and natural gas dual-purpose burner according to claim 6 is characterized in that: A spiral plate (23) is fixedly connected to the middle of the rotating ring (21), a fixed cylinder (25) is fixedly connected to the middle of the spiral plate (23), a vent hole (24) is provided on the surface of the spiral plate (23), one end of the fixed cylinder (25) extends to the interior of the natural gas transmission pipe (10), and the other end corresponds to the transmission hole (8).

Images