3D (three-dimensional) hydrogen-doped burner

Abstract

The utility model discloses a 3D hydrogen-doped burner which comprises a shell, an air inlet pipe, a hydrogen inlet pipe, a mixer, an additive conveying pipe and an ignition electrode. The shell comprises an air inlet section and a mixing section which are connected in the length direction, the inner diameter of the shell is larger than the outer diameter of the air inlet pipe, the inner diameter of the air inlet pipe is larger than the outer diameter of the hydrogen inlet pipe, and the air inlet pipe is located on the inner side of the air inlet section; the hydrogen inlet pipe is positioned on the inner side of the air inlet pipe; the mixer is arranged in the mixing section; the additive conveying pipe comprises a conveying section and a release section, the release section is of an annular pipe structure and is located between the air inlet pipe and the hydrogen inlet pipe, and outflow holes are distributed in the release section in the circumferential direction; one end of the conveying section is positioned outside the shell, and the other end extends between the air inlet pipe and the hydrogen inlet pipe and is communicated with the release section; the ignition electrode extends into the downstream outlet end of the mixer in the mixing section from the side wall of the shell. According to the device, simultaneous feeding and rapid mixing of combustion materials, hydrogen, additives and air are achieved, sufficient combustion and combustion energy increasing are achieved, efficiency is improved, and emission is reduced.

Description

Technical Field

[0001] The utility model relates to a 3D hydrogen-blending burner, belonging to the technical field of hydrogen-blending combustion equipment. Background Art

[0002] Natural gas is a clean, efficient and safe energy source. Due to its advantages such as low carbon emissions and efficient utilization, it is widely used in urban gas, industrial heating, automobile fuel and other fields.

[0003] The natural gas hydrogen blending combustion technology is a way of energy utilization that mixes an appropriate amount of hydrogen into natural gas and then burns them together. Hydrogen is a colorless, odorless, very light gas with high calorific value and low emission characteristics. It is one of the ideal clean energy sources. The principle of hydrogen blending combustion is to use the high hydrogen-carbon ratio and high combustion temperature of hydrogen to enhance the flammability and stability of the fuel, while reducing the CO generated by combustion. 2 , CO, SOx, NOx and other harmful gases, thereby achieving the goal of emission reduction. In order to achieve full mixing of hydrogen, fuel, air, etc., improve safety, and facilitate the addition of additives to achieve energy enhancement and other effects, the inventor designed a 3D hydrogen blending burner. Utility Model Content

[0004] The utility model provides a 3D hydrogen-blending burner, which can realize rapid mixing of fuel, hydrogen, additives and air, achieve full combustion, realize combustion energy enhancement, improve efficiency and reduce emissions, and is safe and stable.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows:

[0006] A 3D hydrogen-blending burner comprises a housing, an air inlet pipe, a hydrogen inlet pipe, a mixer, an additive delivery pipe and an ignition electrode;

[0007] The outer shell, the air inlet pipe and the hydrogen inlet pipe are all hollow straight pipe structures. The outer shell includes an air inlet section and a mixing section connected in the length direction. The inner diameter of the outer shell is larger than the outer diameter of the air inlet pipe, and the inner diameter of the air inlet pipe is larger than the outer diameter of the hydrogen inlet pipe. The air inlet pipe is located inside the air inlet section; the hydrogen inlet pipe is located inside the air inlet pipe; and the mixer is arranged in the mixing section.

[0008] The additive delivery pipe includes a delivery section and a release section. The release section is a ring tube structure. The release section is located between the air inlet pipe and the hydrogen inlet pipe, and outflow holes are distributed circumferentially on the release section. One end of the delivery section is located outside the outer shell (connected to the additive storage tank through a pipeline), and the other end extends between the air inlet pipe and the hydrogen inlet pipe to be connected with the release section. The ignition electrode extends from the side wall of the outer shell into the outlet end downstream of the mixer in the mixing section.

[0009] The upstream to downstream direction of the present application is consistent with the direction of gas flow.

[0010] The above-mentioned straight pipe structure refers to the straight central axis.

[0011] When in use, hydrogen enters from the hydrogen inlet pipe, air enters from the space between the air inlet pipe and the hydrogen inlet pipe, fuel enters from the space between the outer shell and the air inlet pipe, and additives are sent from the additive delivery pipe to the space between the air inlet pipe and the hydrogen inlet pipe; after hydrogen, air, fuel and additives enter, they are mixed in the mixing section, and after being ignited by the ignition electrode at the outlet end of the mixing section, flames are sprayed out.

[0012] As common sense, in gas transportation, it is necessary to ensure that there is no leakage. Existing technology can be used to set a sealing device at each gas inlet end to ensure that each gas and material enters the corresponding cavity without leakage.

[0013] The above-mentioned fuel can be natural gas, coal gas, etc. Additives are used to increase energy and can be added according to on-site combustion requirements.

[0014] The housing, the air inlet pipe and the hydrogen inlet pipe are arranged concentrically, that is, arranged with the same central axis, that is, the three share a common central axis.

[0015] In order to improve the stability of the equipment, as one of the specific implementation schemes, the 3D hydrogen-blended burner also includes a first connecting rod and a second connecting rod, one end of the first connecting rod is connected to the inner wall of the outer shell, and the other end is connected to the outer wall of the air inlet pipe to achieve the connection and fixation of the air inlet pipe; one end of the second connecting rod is connected to the inner wall of the air inlet pipe, and the other end is connected to the outer wall of the hydrogen inlet pipe to achieve the connection and fixation of the hydrogen inlet pipe.

[0016] In order to further improve the stability of the device, at least two first connecting rods and second connecting rods are provided evenly distributed along the periphery.

[0017] In order to facilitate the input connection of different gases, one end of the above-mentioned shell, air inlet pipe and hydrogen inlet pipe are all inlet ends and the other ends are all outlet ends. The outlet ends of the air inlet pipe and hydrogen inlet pipe do not exceed the air inlet section of the shell. The inlet end of the air inlet pipe extends out of the inlet end of the shell, and the inlet end of the hydrogen inlet pipe extends out of the inlet end of the air inlet pipe. This facilitates the input connection of different gases. The delivery section of the additive delivery pipe extends from the side wall of the air inlet pipe into the air inlet pipe and the hydrogen inlet pipe and is connected to the release section. In this way, the side wall of the air inlet pipe can support the additive delivery pipe. Of course, in order to improve the stability, a connecting rod can be added, one end of which is connected to the delivery section and / or release section of the additive delivery pipe, and the other end is connected to the inner wall of the air inlet pipe or the outer wall of the hydrogen inlet pipe.

[0018] The direction from the inlet end to the outlet end is consistent with the direction of gas flow.

[0019] In order to improve the mixing effect, the mixer includes a first diffuser and a second diffuser, the first diffuser and the second diffuser are both conical structures, there is a gap between the first diffuser and the second diffuser, there is a gap between the first diffuser and the second diffuser and the inner wall of the mixing section of the outer shell, and the pointed ends of the first diffuser and the second diffuser are both facing the hydrogen inlet pipe.

[0020] In order to further improve the mixing effect, a polymerizer is provided between the first diffuser and the second diffuser, with one end of the polymerizer being an inlet and the other end being an outlet. The polymerizer is in the shape of a trumpet tube with a gradually decreasing diameter from the inlet to the outlet. The inlet of the polymerizer is connected to the inner wall of the mixing section of the shell along the periphery, and the outlet of the polymerizer faces the second diffuser. There is a gap between the polymerizer and the first diffuser and the second diffuser. In this way, the fuel, hydrogen, additives and air are diffused through the first diffuser, polymerized and drained to the second diffuser through the polymerizer, and then diffused through the second diffuser to achieve full mixing.

[0021] In order to further improve the mixing effect, diffusion blades are provided around the first diffuser and the second diffuser.

[0022] In order to better ensure the mixing effect, a hollow mounting frame is provided in the mixing section of the outer shell, and a mounting shaft is provided on the mounting frame. The first diffuser and the second diffuser can be rotatably mounted on the same or different mounting shafts. Under the impact of the airflow, the first diffuser and the second diffuser can rotate freely, thereby better ensuring the mixing effect. Of course, according to the actual needs of the site, a power device can also be installed to drive the first diffuser and the second diffuser to rotate to achieve a better mixing effect.

[0023] The inner diameter of the mixing section on the shell is smaller than the inner diameter of the air intake section, and the air intake section and the mixing section are transitioned through a tapered section.

[0024] The technologies not mentioned in this utility model are all referred to the prior art.

[0025] The utility model 3D hydrogen-blending burner can realize simultaneous feeding and rapid mixing of fuel, hydrogen, additives and air, achieves full combustion, realizes combustion energy enhancement, improves efficiency and reduces emissions; and has a simple structure, is safe, stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the 3D hydrogen-blended burner of the utility model;

[0027] Figure 2 for Figure 1 Middle AA view;

[0028] Figure 3This is a three-dimensional diagram of the 3D hydrogen-blended burner of the utility model;

[0029] Figure 4 A perspective view of the 3D hydrogen-blended burner of this utility model Figure 1 ;

[0030] Figure 5 A perspective view of the 3D hydrogen-blended burner of this utility model Figure 2 ;

[0031] In the figure, 1 is the outer shell, 11 is the air intake section, 12 is the mixing section, 2 is the air inlet pipe, 3 is the hydrogen inlet pipe, 4 is the mixer, 41 is the first diffuser, 42 is the second diffuser, 43 is the polymerizer, 5 is the additive delivery pipe, 51 is the delivery section, 52 is the release section, 6 is the ignition electrode, and 7 is the flame. DETAILED DESCRIPTION

[0032] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0033] In this application, directional words such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings or in use, and are only for the convenience of describing the application, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the application.

[0034] Example 1

[0035] like Figure 1-5 As shown, a 3D hydrogen-blending burner includes a housing, an air inlet pipe, a hydrogen inlet pipe, a mixer, an additive delivery pipe and an ignition electrode;

[0036] The outer shell, the air inlet pipe and the hydrogen inlet pipe are all hollow straight pipe structures. The outer shell includes an air inlet section and a mixing section connected in the length direction. The inner diameter of the mixing section on the outer shell is smaller than the inner diameter of the air inlet section. The air inlet section and the mixing section are transitioned through a tapered section. The inner diameter of the outer shell is larger than the outer diameter of the air inlet pipe. The inner diameter of the air inlet pipe is larger than the outer diameter of the hydrogen inlet pipe. The air inlet pipe is located inside the air inlet section; the hydrogen inlet pipe is located inside the air inlet pipe; the outer shell, the air inlet pipe and the hydrogen inlet pipe are concentrically arranged; and the mixer is arranged in the mixing section.

[0037] The additive delivery pipe includes a delivery section and a release section. The release section is a ring tube structure (annular tube). The release section is located between the air inlet pipe and the hydrogen inlet pipe (the hydrogen inlet pipe is located on the inner side of the release section). Outflow holes are distributed circumferentially on the release section (in this example, the diameter of the outflow holes is 2 mm, and the interval between two adjacent outflow holes is 2 mm); one end of the delivery section is located outside the outer shell, and the other end extends between the air inlet pipe and the hydrogen inlet pipe to be connected with the release section; the ignition electrode extends from the side wall of the outer shell into the outlet end downstream of the mixer in the mixing section.

[0038] When in use, hydrogen enters from the hydrogen inlet pipe, air enters from the space between the air inlet pipe and the hydrogen inlet pipe, fuel enters from the space between the shell and the air inlet pipe, and additives are sent from the additive delivery pipe to the space between the air inlet pipe and the hydrogen inlet pipe; after hydrogen, air, fuel and additives enter, they are mixed in the mixing section, and after being ignited by the ignition electrode at the outlet of the mixing section, flames are sprayed out. The fuel can be natural gas, coal gas, etc. Additives are used to increase energy and can be added according to on-site combustion needs.

[0039] Example 2

[0040] On the basis of Example 1, the following improvements are further made: In order to improve the stability of the equipment, the 3D hydrogen-blending burner further includes a first connecting rod and a second connecting rod, one end of the first connecting rod is connected to the inner wall of the shell, and the other end is connected to the outer wall of the air inlet pipe; one end of the second connecting rod is connected to the inner wall of the air inlet pipe, and the other end is connected to the outer wall of the hydrogen inlet pipe. The first connecting rod and the second connecting rod are each provided with two evenly distributed along the periphery.

[0041] Example 3

[0042] On the basis of Example 1 or 2, the following improvements were further made: Figure 1 As shown, in order to facilitate the input connection of different gases, one end of the above-mentioned shell, air inlet pipe and hydrogen inlet pipe are all inlet ends, and the other ends are all outlet ends. The outlet ends of the air inlet pipe and the hydrogen inlet pipe do not exceed the air inlet section of the shell. The inlet end of the air inlet pipe extends out of the inlet end of the shell, and the inlet end of the hydrogen inlet pipe extends out of the inlet end of the air inlet pipe. This facilitates the input connection and sealing of different gases. The delivery section of the additive delivery pipe extends from the side wall of the air inlet pipe into the air inlet pipe and the hydrogen inlet pipe and is connected to the release section. In this way, the side wall of the air inlet pipe can support the additive delivery pipe. Of course, in order to improve the stability, a connecting rod can be added, one end of which is connected to the delivery section and / or release section of the additive delivery pipe, and the other end is connected to the inner wall of the air inlet pipe or the outer wall of the hydrogen inlet pipe.

[0043] Example 4

[0044] On the basis of Example 3, the following improvements were made: Figure 1 , Figure 4-5As shown, in order to improve the mixing effect, the mixer includes a first diffuser and a second diffuser, both of which are conical structures, with a gap between the first diffuser and the second diffuser, and a gap between the first diffuser and the second diffuser and the inner wall of the mixing section of the shell, and the pointed ends of the first diffuser and the second diffuser are both facing the hydrogen inlet pipe. A polymerizer is arranged between the first diffuser and the second diffuser, with one end of the polymerizer being an inlet and the other end being an outlet. The direction from the inlet to the outlet of the polymerizer is a trumpet-shaped tube with a gradually decreasing caliber, and the inlet of the polymerizer is connected to the inner wall of the mixing section of the shell along the periphery. In this way, the fuel, hydrogen, additives and air are diffused through the first diffuser, and then through the polymerizer to the second diffuser, and then diffused through the second diffuser to achieve full mixing.

[0045] Example 5

[0046] On the basis of Example 4, the following improvements were made: Figure 4-5 As shown, in order to further improve the mixing effect, the periphery of the first diffuser and the second diffuser is provided with three diffuser blades evenly distributed along the periphery. A hollow mounting frame is provided in the mixing section of the outer shell (that is, the hollow mounting frame is installed on the inner wall of the mixing section of the outer shell), and a mounting shaft is provided on the mounting frame. The first diffuser and the second diffuser can be rotatably mounted on the same or different mounting shafts. Under the impact of the airflow, the first diffuser and the second diffuser can rotate freely, thereby better ensuring the mixing effect. Of course, according to the actual needs on site, a power device can be installed to drive the first diffuser and the second diffuser to rotate to achieve a better mixing effect.

[0047] The additives used in this example include, by weight, 47 parts of methanol, 8.5 parts of methyl phosphate, 12.5 parts of low-carbon alcohol, 10 parts of cyclohexane, 7.5 parts of cyclohexanone, 7.5 parts of 45 petroleum ether (Qilu Petrochemical, purity 30%, first-class product), 10 parts of solvent oil 120# (Shanhai Chemical, first-class product, purity 99.9%), 1 part of methyl chloride, 0.02 parts of co-solvent, 0.05 parts of combustion aid and 15 parts of pure water; the low-carbon alcohol is propanol; the co-solvent is tri-tert-butyl phosphate, and the combustion aid is tricyclopentadiene iron; the preparation of the methanol additive is: two high-speed stirrings are set on both sides of the low-speed stirring shaft, methanol is added, stirring is turned on, The speed of high-speed stirring is 1500rpm and the speed of low-speed stirring is 30rpm. The remaining raw materials are added as additives. The feeding time of the additives is 60min. At the same time, the temperature of the materials in the reactor is raised to 80℃ through the temperature control device during the addition of the additives. After the addition of the additives, the materials are kept at 80℃ and stirred for 22min; the heating is stopped and the stirring is continued until the materials in the reactor naturally cool to room temperature (25℃), the low-speed stirring motor is turned off, and the speed of high-speed stirring is reduced to zero within 8min. After the filter, it enters the finished product collection tank to obtain the methanol fuel energy-enhancing additive. It is left at room temperature for 24 months without stratification. The amount of additive is 3-10% of the combustion material. In one practice, the volume of hydrogen introduced is 20% of the volume of natural gas, and the mass of additive is 4% of the mass of natural gas. The combustion is stable and sufficient, and the additive has a significant energy-enhancing effect on the combustion of the mixture of natural gas and hydrogen. Other additives can also be selected according to on-site needs.

[0048] The 3D hydrogen-blending burners in the above-mentioned examples can realize the simultaneous feeding and rapid mixing of fuel, hydrogen, additives and air, achieve full combustion, realize combustion energy enhancement, improve efficiency and reduce emissions; the structure is simple, safe, stable and reliable.

Claims

1. A 3D hydrogen-blended burner, characterized in that: It comprises a housing (1), an air inlet pipe (2), a hydrogen inlet pipe (3), a mixer (4), an additive delivery pipe (5) and an ignition electrode (6); The outer shell (1), the air inlet pipe (2) and the hydrogen inlet pipe (3) are all hollow straight pipe structures. The outer shell (1) includes an air inlet section (11) and a mixing section (12) connected to each other in the length direction. The inner diameter of the outer shell (1) is larger than the outer diameter of the air inlet pipe (2). The inner diameter of the air inlet pipe (2) is larger than the outer diameter of the hydrogen inlet pipe (3). The air inlet pipe (2) is located inside the air inlet section (11); the hydrogen inlet pipe (3) is located inside the air inlet pipe (2); and the mixer (4) is arranged inside the mixing section (12). The additive delivery pipe (5) comprises a delivery section (51) and a release section (52); the release section (52) is a ring pipe structure; the release section (52) is located between the air inlet pipe (2) and the hydrogen inlet pipe (3); and outflow holes are distributed circumferentially on the release section (52); one end of the delivery section (51) is located outside the outer shell (1), and the other end extends between the air inlet pipe (2) and the hydrogen inlet pipe (3) to communicate with the release section (52); and the ignition electrode (6) extends from the side wall of the outer shell (1) into the outlet end of the mixer (4) downstream of the mixing section (12).

2. The 3D hydrogen-blended burner according to claim 1, characterized in that: The housing (1), the air inlet pipe (2) and the hydrogen inlet pipe (3) are concentrically arranged.

3. The 3D hydrogen-blended burner according to claim 1 or 2, characterized in that: It also comprises a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is connected to the inner wall of the outer shell (1) and the other end is connected to the outer wall of the air inlet pipe (2); one end of the second connecting rod is connected to the inner wall of the air inlet pipe (2) and the other end is connected to the outer wall of the hydrogen inlet pipe (3).

4. The 3D hydrogen-blended burner according to claim 3, characterized in that: There are at least two first connecting rods and second connecting rods evenly distributed along the periphery.

5. The 3D hydrogen-blended burner according to claim 1 or 2, characterized in that: One end of the housing (1), the air inlet pipe (2) and the hydrogen inlet pipe (3) are all inlet ends and the other ends are all outlet ends. The outlet ends of the air inlet pipe (2) and the hydrogen inlet pipe (3) do not extend beyond the air inlet section (11) of the housing (1). The inlet end of the air inlet pipe (2) extends beyond the inlet end of the housing (1), and the inlet end of the hydrogen inlet pipe (3) extends beyond the inlet end of the air inlet pipe (2). The delivery section (51) of the additive delivery pipe (5) extends from the side wall of the air inlet pipe (2) into between the air inlet pipe (2) and the hydrogen inlet pipe (3) and communicates with the release section (52).

6. The 3D hydrogen-blended burner according to claim 1 or 2, characterized in that: The mixer (4) comprises a first diffuser (41) and a second diffuser (42); the first diffuser (41) and the second diffuser (42) are both conical structures; a gap is left between the first diffuser (41) and the second diffuser (42); a gap is left between the first diffuser (41) and the second diffuser (42) and the inner wall of the mixing section (12) of the outer shell; and the pointed ends of the first diffuser (41) and the second diffuser (42) are both facing the hydrogen inlet pipe (3).

7. The 3D hydrogen-blended burner according to claim 6, characterized in that: A concentrator (43) is provided between the first diffuser (41) and the second diffuser (42). One end of the concentrator (43) is an inlet and the other end is an outlet. The concentrator (43) is in the shape of a trumpet tube with a gradually decreasing diameter from the inlet to the outlet. The inlet of the concentrator (43) is connected to the inner wall of the mixing section (12) of the outer shell (1) along the periphery.

8. The 3D hydrogen-blended burner according to claim 6, characterized in that: Diffusing blades are provided around the first diffuser (41) and the second diffuser (42).

9. The 3D hydrogen-blended burner according to claim 8, characterized in that: A hollow mounting frame is provided in the mixing section (12) of the housing (1), and a mounting shaft is provided on the mounting frame. The first diffuser and flow guider (41) and the second diffuser and flow guider (42) are rotatably mounted on the same or different mounting shafts.

10. The 3D hydrogen-blended burner according to claim 1 or 2, characterized in that: The inner diameter of the mixing section (12) on the outer shell (1) is smaller than the inner diameter of the air intake section (11), and a gradually contracting section transitions between the air intake section (11) and the mixing section (12).

Images