CN212227017U - Ignition burner - Google Patents

Abstract

The utility model discloses an ignition nozzle, including some firearm, the fuel gas passageway that is used for letting in fuel gas, the nitrogen gas passageway that is used for letting in the air passageway of air and is used for letting in nitrogen gas, some firearm, nitrogen gas passageway, fuel gas passageway, air passageway are provided with fuel gas import and fuel gas export on the fuel gas passageway along inside-out coaxial setting in proper order, the last air intlet and the air outlet of being provided with of air passageway, fuel gas export axis be certain contained angle with the air outlet axis and intersect. The utility model discloses an some firearm, fuel gas passageway, air passage in the ignition nozzle follow inside to outside coaxial setting in proper order, have changed the mixed mode of traditional fuel gas and air and the ignition position of some firearm, and the ignition nozzle easily ignites and can form the flame that stablizes the burning, avoids taking place to take off the fire and leads to the nozzle to extinguish.

Description

Ignition burner

Technical Field

The utility model belongs to the technical field of the gasifier nozzle, concretely relates to ignition nozzle.

Background

The lump coal pressurized slag gasifier belongs to a fixed bed slag tapping gasifier, and compared with the coal chemical industry technology generally applied in China, the technology has the biggest characteristics that: the raw coal utilized is high ash melting point anthracite. In the industry of small nitrogenous fertilizers, the anthracite block coal is one of the main raw material sources, and according to statistics, the synthetic ammonia capacity using the anthracite coal as the raw material accounts for 2125 ten thousand tons and accounts for 44.1 percent, wherein the synthetic ammonia capacity using the anthracite block coal as the raw material accounts for more than 70 percent. A normal-pressure intermittent fixed bed gasification furnace (UGI furnace) is a main mode of smokeless lump coal gasification, the gasification efficiency of the UGI furnace is low, the pollutant yield of gas and water is huge, related requirements of upgrading and stopping production of the UGI furnace are clearly proposed by related national departments, and the UGI furnace is planned to be completely shut down in 2020. The lump coal pressurized slag gasification technology is an important way for solving the problem of efficient and clean utilization of smokeless lump coal in the small nitrogen fertilizer industry.

The lump coal pressurized slag gasifier needs to be ignited at first in the starting process, the ignition burner is used for igniting the main burner to provide heat for the heating of the gasifier, and further conditions are provided for the gasification furnace to put steam oxygen. In the combustion chamber of ignition nozzle and main burner installation and gasifier, there is a large amount of sharp cold water in the combustion chamber lower part, and the combustion chamber begins to ignite after being pressurized to 1.0 ~ 4.5MPa pressure by nitrogen gas during ignition, is in the high pressure humid environment when the ignition nozzle is igniteed promptly, and the ignition of nozzle is very difficult under this kind of environment, and some firearm very easily damage.

As shown in fig. 1, the conventional ignition burner structure mainly has the following problems:

(1) the fuel gas nozzle sprays fuel gas directly forwards and is slowly mixed with the air coming from the same direction, so that no mixed gas of the fuel gas and the air for ignition exists at the ignition position of the igniter;

(2) in order to enable combustible mixed gas to exist at the igniter, a part of burners are provided with a baffle plate at a fuel gas nozzle, and fuel gas sprayed from a nozzle is guided to the head of the igniter to achieve the purpose of ignition, so that the igniter is kept at high temperature for a long time, and the service life of the igniter is greatly shortened;

(3) the burner has no stable flame area, and the flame combustion is unstable and easy to generate the phenomenon of fire dropping;

(4) the fuel gas inlet and the air inlet are welding parts which can not be disassembled, and the damaged fuel gas inlet and the damaged air inlet are difficult to maintain;

(5) the igniter is in a high-pressure humid environment, when water vapor enters an insulating layer at the head of the igniter, the igniter is easy to break down, and one igniter needs to be replaced when the igniter is ignited on site for three times on average.

Disclosure of Invention

In order to solve the problem, the utility model provides an ignition nozzle solves current ignition nozzle air and fuel gas mixing and leads to the unable stable combustion area that forms of some firearm anterior segment slowly.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

the utility model provides an ignition nozzle, includes some firearm, the air channel that is used for letting in the fuel gas passageway of fuel gas and is used for letting in the air, the nitrogen gas passageway that is used for letting in nitrogen gas, some firearm, nitrogen gas passageway, fuel gas passageway, air channel along inside outside coaxial setting in proper order, be provided with fuel gas import and fuel gas export on the fuel gas passageway, last air inlet and the air outlet of being provided with of air channel, fuel gas export axis and air outlet axis be certain contained angle crossing.

Preferably, the fuel gas outlet axis inclines towards the air channel, and the included angle between the fuel gas outlet axis and the fuel gas channel axis is 10-90 degrees.

Specifically, a first pipeline, a second pipeline and a third pipeline are sequentially sleeved outside the igniter, a gap formed between the first pipeline and the igniter forms the nitrogen channel, a gap formed between the second pipeline and the first pipeline forms the fuel gas channel, and a gap formed between the third pipeline and the second pipeline forms the air channel; the two ends of the first pipeline are provided with a nitrogen inlet and a nitrogen outlet, the two ends of the second pipeline are provided with a fuel gas inlet and a fuel gas outlet, and the two ends of the third pipeline are provided with an air inlet and an air outlet.

Specifically, an air distributor is arranged in an air channel at the head of the igniter, and a plurality of air outlets uniformly distributed around the circumferential direction of the air channel are arranged on the air distributor; one end of the second pipeline close to the head of the igniter is arranged to be an arc-shaped surface which gradually shrinks towards the direction of the first pipeline and is connected with the first pipeline in a closed mode, and a plurality of fuel gas outlets which are evenly distributed along the circumferential direction of the arc-shaped surface are circumferentially arranged on the arc-shaped surface.

Specifically, the nitrogen inlet, the fuel gas inlet and the air inlet are arranged in a direction perpendicular to the axis of the igniter.

Specifically, an igniter flange is arranged at the tail of the igniter, a first nitrogen channel flange and a second nitrogen channel flange are arranged on the first pipeline, a first fuel gas channel flange and a second fuel gas channel flange are arranged on the second pipeline, a first air channel flange and a second air channel flange used for installing an ignition burner are arranged on the third pipeline, the igniter flange is connected with the first nitrogen channel flange, the second nitrogen channel flange is connected with the first fuel gas channel flange, and the second fuel gas channel flange is connected with the first air channel flange.

Compared with the prior art, the beneficial effects of the utility model are that:

the igniter, the fuel gas channel and the air channel in the ignition burner of the utility model are coaxially arranged from inside to outside in sequence, so that the traditional mixing mode of fuel gas and air and the ignition position of the igniter are changed, the ignition burner is easy to ignite and can form stable combustion flame, and the burning nozzle is prevented from being extinguished due to the fire dropping; and a nitrogen channel is added to lead in nitrogen to protect the igniter, so that the igniter is prevented from being damaged by water vapor and other corrosive gases in the combustion chamber when the igniter is not operated. According to the actual ignition test on site, the ignition success rate is more than 95%, and the service life of the igniter is prolonged to more than 10 times.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

Fig. 1 is a schematic view of a conventional ignition burner structure.

Fig. 2 is a schematic view of the overall structure of the nozzle of the present invention.

Fig. 3 is an enlarged view of a portion of the firing tip.

Fig. 4 is an isometric view of the firing tip.

The reference numerals in the figures denote: 1-an igniter, 2-a fuel gas channel, 3-an air channel, 4-a nitrogen gas channel, 5-a first pipeline, 6-a second pipeline and 7-a third pipeline;

101-igniter flange;

201-a fuel gas inlet, 202-a fuel gas outlet;

301-air inlet, 302-air outlet, 303-air uniform distributor;

401-nitrogen inlet, 402-nitrogen outlet;

501-a first nitrogen channel flange, 502-a second nitrogen channel flange;

601-arc face, 602-first fuel gas channel flange, 603-second fuel gas channel flange;

701-first air channel flange, 702-second air channel flange.

The following detailed description of the present invention is provided in connection with the accompanying drawings and the detailed description of the invention.

Detailed Description

The utility model discloses a nozzle can be used to in the fixed bed slack coal slag pressurization gasifier, ignites main burner through this nozzle and provides the heat for the intensification of gasifier. The burner structure can also be used in the fields of metallurgy, electric power, industrial kilns and the like.

The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.

In the present invention, unless otherwise specified, the terms of orientation such as "upper and lower" are generally defined with reference to the drawing plane of the corresponding drawing, and "inner and outer" are defined with reference to the outline of the corresponding drawing.

As shown in fig. 2, the utility model provides an ignition burner, including some firearm 1, be used for letting in the fuel gas passageway 2 of fuel gas, be used for letting in the air passageway 3 of air and be used for letting in the nitrogen gas passageway 4 of nitrogen gas, wherein, some firearm 1, nitrogen gas passageway 4, fuel gas passageway 2, air passageway 3 are along inside to outside coaxial setting in proper order.

The fuel gas channel 2 is provided with a fuel gas inlet 201 and a fuel gas outlet 202, the air channel 3 is provided with an air inlet 301 and an air outlet 302, and the axis of the fuel gas outlet 202 and the axis of the air outlet 302 form a certain included angle to be crossed, so that the sprayed air and the sprayed fuel gas are crossed and mixed. In a preferred embodiment of the present invention, the axis of the fuel gas outlet 202 is inclined toward the air channel 3, and the included angle between the axis of the fuel gas outlet 202 and the axis of the fuel gas channel 2 is 10 to 90 degrees, preferably 45 to 60 degrees. For the ignition nozzle structure that fig. 1 shows, the utility model discloses an ignition nozzle has changed the mixed mode of traditional fuel gas and air and the ignition position of some firearm, and the ignition nozzle easily ignites and can form the flame of stable burning, avoids taking place to take off the fire and leads to the nozzle to extinguish. And through increasing the nitrogen gas passageway, let in nitrogen gas protection point firearm for avoid the point firearm to receive the damage of steam and other corrosive gas in the combustion chamber when the point firearm is not operated.

The utility model discloses an in the embodiment, this ignition mainly comprises some firearm 1, at first pipeline 5, second pipeline 6 and the third pipeline 7 that the external cover of some firearm 1 was established in proper order, wherein, the clearance that sets up between first pipeline 5 and the some firearm 1 forms nitrogen gas passageway 4, and the clearance that sets up between second pipeline 6 and the first pipeline 5 forms fuel gas passageway 2, and the clearance that sets up between third pipeline 7 and the second pipeline 6 forms air passageway 3.

And a nitrogen inlet 401 and a nitrogen outlet 402 are arranged at two ends of the first pipeline 5, wherein the nitrogen outlet is formed by a gap between the igniter 1 and the pipe wall of the first pipeline 5, and when the ignition burner is stopped, nitrogen flows out through the gap to play a role in protecting the igniter 1. The second duct 6 is provided at both ends thereof with a fuel gas inlet 201 and a fuel gas outlet 202, and the third duct 7 is provided at both ends thereof with an air inlet 301 and an air outlet 302. In this embodiment, the nitrogen inlet 401, the fuel gas inlet 201, and the air inlet 301 are disposed perpendicular to the axial direction of the igniter 1.

Be located to be provided with air uniform distributor 303 in the air passage 3 of some firearm heads, air uniform distributor 303 is last to set up a plurality of air outlet 302 air uniform distributors around 3 circumference evenly distributed of air passage and is a plate, and the slope welding also can be other structures on third pipeline 7 and 6 pipe walls of second pipeline, and the flat board punches or flat milling flutes isotructure can all be regarded as the utility model discloses an air uniform distributor. As shown in fig. 3, one end of the second pipe 6 near the igniter head is provided with an arc surface 601 gradually shrinking towards the first pipe 5, the arc surface 601 is connected with the first pipe 5 in a closed manner, and a plurality of fuel gas outlets 202 are uniformly distributed along the circumferential direction of the arc surface 601. As can be seen from the drawing of FIG. 3, the fuel gas outlet 202 forms a certain included angle with the axis of the fuel gas channel 2, air enters the air channel from the air inlet, and then is rectified by the air uniform distributor or the swirler and then is rapidly crossed and mixed with the fuel gas sprayed from the fuel gas outlet 202 to form a low-speed backflow area, so that the ignition is easy and the flame is stable. A low-pressure area is formed on the front end surfaces of the igniter 1 and the fuel gas outlet 202, a small combustible mixture low-speed backflow area is formed in the low-pressure area, the backflow area is just in the ignition range of the igniter, so that the ignition success rate is greatly improved, and meanwhile, the low-speed backflow area provides stable heat supply for the far-end high-speed flame to ensure the stability of the flame.

For the easy dismounting of each passageway and igniter, in a preferred embodiment of the present invention, the igniter flange 101 is disposed at the tail of the igniter 1, the first nitrogen passage flange 501 and the second nitrogen passage flange 502 are disposed on the first pipeline 5, the first fuel gas passage flange 602 and the second fuel gas passage flange 603 are disposed on the second pipeline 6, the first air passage flange 701 and the second air passage flange 702 are disposed on the third pipeline 7, wherein the igniter flange 101 is connected with the first nitrogen passage flange 501, the second nitrogen passage flange 502 is connected with the first fuel gas passage flange 602, the second fuel gas passage flange 603 is connected with the first air passage flange 701, and the second air passage flange 702 is used for mounting the ignition burner to other components. The butt flange and the mounting flange can be freely detached, and the requirements for disassembling and maintaining various components in the ignition burner are met.

The specific implementation parameters of the present invention are given below:

the third tube (air tube) is 65X 2.5mm in diameter, the second tube (fuel gas tube) is 38X 3mm in diameter, and the first tube (nitrogen gas tube) is 20X 2mm in diameter, wherein 2.5mm, 3mm, 2mm represent the wall thickness. The fuel gas nozzle is provided with 8 small holes with the diameter of 2mm, and the included angle between the small holes and the axis is 45 degrees. The air uniform distributor is provided with 16 square holes of 6 multiplied by 4 for rectifying the air. The temperature of the fuel gas is 25 ℃, the flow rate of the fuel gas is 30Nm3/h, and the inlet pressure of the fuel gas is 3.5 MPa; the air temperature is 25 ℃, the air flow is 300Nm3/h, and the air inlet pressure is 3.5 MPa; the nitrogen temperature is 25 ℃, the nitrogen flow is 5Nm3/h, and the nitrogen inlet pressure is 3.5 MPa; the back pressure of the combustion chamber is 1.5 MPa. The test parameters and test results are shown in table 1.

Table 1 test results of ignition burners

From the upper table can see, through the utility model discloses an ignition nozzle ignition success rate is high, and the ignition success rate is greater than 95%. In addition, according to the proportion of the air flow and the fuel gas flow, the ignition burner can be adjusted within the load range of 30-130%, and stable combustion is guaranteed.

The various features described in the foregoing detailed description can be combined in any suitable manner without departing from the spirit of the invention, and should also be construed as disclosed in the invention.

Claims (6)

1. An ignition burner comprises an igniter (1), a fuel gas channel (2) for introducing fuel gas and an air channel (3) for introducing air, wherein the fuel gas channel (2) is provided with a fuel gas inlet (201) and a fuel gas outlet (202), the air channel (3) is provided with an air inlet (301) and an air outlet (302),

still including nitrogen gas passageway (4) that are used for letting in nitrogen gas, some firearm (1), nitrogen gas passageway (4), fuel gas passageway (2), air channel (3) along inside to outside coaxial setting in proper order, fuel gas export (202) axis and air outlet (302) axis be certain contained angle and intersect.

2. An ignition burner as claimed in claim 1, characterised in that the axis of the fuel gas outlet (202) is inclined towards the air passage (3) and the angle between the axis of the fuel gas outlet (202) and the axis of the fuel gas passage (2) is between 10 ° and 90 °.

3. An ignition burner as defined in claim 1, characterized in that a first pipe (5), a second pipe (6) and a third pipe (7) are sequentially sleeved outside the igniter (1), a gap arranged between the first pipe (5) and the igniter (1) forms the nitrogen channel (4), a gap arranged between the second pipe (6) and the first pipe (5) forms the fuel gas channel (2), and a gap arranged between the third pipe (7) and the second pipe (6) forms the air channel (3); the two ends of the first pipeline (5) are provided with a nitrogen inlet (401) and a nitrogen outlet (402), the two ends of the second pipeline (6) are provided with a fuel gas inlet (201) and a fuel gas outlet (202), and the two ends of the third pipeline (7) are provided with an air inlet (301) and an air outlet (302).

4. An ignition burner as claimed in claim 3, characterised in that an air distributor (303) is provided in the air passage (3) at the head of the igniter, the air distributor (303) being provided with a plurality of air outlets (302) which are evenly distributed circumferentially around the air passage (3); one end of the second pipeline (6) close to the head of the igniter is arranged to be an arc-shaped surface (601) which gradually shrinks towards the first pipeline (5), the arc-shaped surface (601) is connected with the first pipeline (5) in a closed mode, and a plurality of fuel gas outlets (202) which are evenly distributed along the circumferential direction of the arc-shaped surface (601) are arranged on the arc-shaped surface.

5. An ignition burner as claimed in claim 3, characterised in that the nitrogen inlet (401), the fuel gas inlet (201) and the air inlet (301) are arranged perpendicular to the axis of the igniter (1).

6. An ignition burner as defined in claim 1, characterized in that an igniter flange (101) is provided at the rear of the igniter (1), a first nitrogen passage flange (501) and a second nitrogen passage flange (502) are provided on the first pipe (5), a first fuel gas passage flange (602) and a second fuel gas passage flange (603) are provided on the second pipe (6), and a first air passage flange (701) and a second air passage flange (702) for mounting the ignition burner are provided on the third pipe (7), wherein the igniter flange (101) is connected to the first nitrogen passage flange (501), the second nitrogen passage flange (502) is connected to the first fuel gas passage flange (602), and the second fuel gas passage flange (603) is connected to the first air passage flange (701).

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