CN203010676U - Unit nozzle for mass-flow medium-and-low heat value fuel - Google Patents
Unit nozzle for mass-flow medium-and-low heat value fuel Download PDFInfo
- Publication number
- CN203010676U CN203010676U CN 201220719712 CN201220719712U CN203010676U CN 203010676 U CN203010676 U CN 203010676U CN 201220719712 CN201220719712 CN 201220719712 CN 201220719712 U CN201220719712 U CN 201220719712U CN 203010676 U CN203010676 U CN 203010676U
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- fuel
- air
- conical shell
- circumferentially spaced
- nozzle
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Abstract
The utility model provides a unit nozzle for mass-flow medium-and-low heat value fuel, and relates to a fuel nozzle which can be operated safely, stably and high efficiently. A central oil nozzle is arranged in a taper-shaped shell. The central oil nozzle and the taper-shaped shell are arranged on the same axis. A taper-shaped shell air cyclone is arranged on the outer wall of an outlet end of the taper-shaped shell. The outer surface of the taper-shaped shell air cyclone is tapered and shares the same tapering direction with the taper-shaped shell. An integral shroud is fixedly connected to the outer edge of the outlet end of the taper-shaped shell air cyclone. The integral shroud and the taper-shaped shell air cyclone are arranged on the same axis, and the end face of the integral shroud is flush with that of the taper-shaped shell air cyclone. The outlet end of the taper-shaped shell is arranged in a sleeve and connected with the sleeve through the integral shroud. Inner space of the sleeve arranged on the upper portion of the outlet end of the taper-shaped shell is a mixing area of compressed air and medium-and-low heat value air. A first cyclone for fuel is matched with a second cyclone for air to generate fuel for the fuel nozzle, namely air mixture. The fuel nozzle can be operated safely, stably and efficiently.
Description
Technical field
The utility model relates to a kind of fuel nozzle, is specifically related to the fuel nozzle that in Integrated gasification combined cycle (IGCC) electricity generation system, gas turbine uses.
Background technology
The combustion system burning medium and low heat value fuel of the gas turbine that some are known is to produce the exhaust that drives turbine.Yet compare with other fuel (as natural gas), most of known medium and low heat value fuel calorific value is low, and the wobbe index that comparing with other fuel of therefore producing also may be lower.In addition, most of known medium and low heat value fuel has larger hydrogen content, causes between fuel flow characterization class hour very shortly, and fuel reaction is very high.Due to this combination of low wobbe index and high fuel reaction, for fuel nozzle can be safely, stable, operation efficiently, control so fuel and all tool had very important significance with discharging with the performance of mixing for combustion chamber of air.
The utility model content
The purpose of this utility model is to provide the unit nozzle of the large flow medium and low heat value fuel burning of a kind of tissue used in conjunction with combustion chamber so that fuel nozzle can be safely, stable, move efficiently.
The utility model is to solve the problems of the technologies described above the technical scheme of taking to be:
A kind of large flow medium and low heat value fuel described in the utility model unit nozzle comprises center oil nozzle, conical shell, integral shroud and sleeve pipe, described center oil nozzle is placed in conical shell and the two is coaxial, the port of export outer wall of conical shell port of export inwall and heart oil burner nozzle is connected together, the port of export outer wall of conical shell is provided with the conical shell air cyclone, and the outer surface of conical shell air cyclone is gradually-reducing shape and consistent with the convergent direction of conical shell; Integral shroud is fixed in conical shell air cyclone port of export outer rim, and the two is coaxial, and end face is concordant; The conical shell port of export is placed in sleeve pipe and between the two and links together by integral shroud, the Mixed Zone that the inner space that is arranged in the sleeve pipe on conical shell port of export top is compressed air and low heat value gas; The fuel openings end of conical shell is provided with first group of fuel openings along circumferentially spaced and second group of fuel openings along circumferentially spaced, wherein first group of fuel openings along circumferentially spaced is positioned at conical shell air cyclone downstream, second group of fuel openings along circumferentially spaced is positioned at conical shell air cyclone inside, between conical shell and center oil nozzle, space is middle low heat value gas passage, and first group of fuel openings along circumferentially spaced is for allowing the low heat value gas of large volume flow to be injected in the Mixed Zone, combustion chamber; The conical shell air cyclone is provided with a plurality of the first air openings along circumferentially spaced, in order to allow compressed air, injects in the Mixed Zone, combustion chamber; Second group of fuel openings along circumferentially spaced is for first with after compressed air tentatively mixes entering low heat value gas again in the Mixed Zone, combustion chamber; Described center oil nozzle comprises atomizing air nozzle body, oil burner nozzle housing, support and spinning disk, the profile of atomizing air nozzle body and oil burner nozzle housing is all tapered, the oil burner nozzle housing is placed in the atomizing air nozzle body and the space between the two is the atomizing air passage, spinning disk is arranged on the port of export of oil burner nozzle housing by support, fuel oil is by entrance outlet ejection from the oil burner nozzle housing through spinning disk of oil burner nozzle housing, shear atomization through atomizing air, with compressed air in Mixed Zone mixing after-combustion; First group of fuel openings along circumferentially spaced and second group of fuel openings along circumferentially spaced are with the directed flow angle θ obliquely of the center line about conical shell
1inject fuel, flow angle θ
1be between 10 ° to 25 °; The arrival end end face of conical shell of take is benchmark, and first group of axial distance along the fuel openings of circumferentially spaced should be greater than conical shell air cyclone top axial distance; Second group of axial distance along the fuel openings of circumferentially spaced should be between conical shell air cyclone top axial distance and conical shell air cyclone bottom axial distance; Described the first air openings is with the flow angle θ of the center line inclined orientation about conical shell
2inject compressed air to Mixed Zone, flow angle θ
2be between 20 ° to 35 °; Have a plurality of the second air openings along circumferentially spaced on described integral shroud.
Described medium and low heat value fuel flow is between 60kg/s to 80kg/s, and main component is H2 (hydrogen) and CO, and wherein the H2 volume fraction is about 35%, the CO volume fraction is about 45%, because the hydrogen self-ignition temperature is low, flame propagation speed, nozzle adopts diffusion combustion mode, guarantee air and fuel jet speed, avoid tempering to produce, and, because the CO burning velocity is slower, should build enough strong recirculation zone at head, strengthen the blending performance of fuel and air, avoid the length of flame long.
The beneficial effects of the utility model are: be provided with a plurality of fuel openings along circumferentially spaced of first and second group on conical shell, in order to guide medium and low heat value fuel to Nei Mixed Zone, combustion chamber; The conical shell air cyclone is provided with a plurality of air openings along circumferentially spaced, and in order to compressed air is injected to Mixed Zone, the plurality of air openings is oriented and contributes to produce the swirling number that is greater than 0.6 in Mixed Zone.The integral shroud of inner conical and a plurality of air openings form the rectangle air flow channel of directional inclination jointly, strengthen the inscribe directionality of air openings.The utility model utilization matches with the second eddy flow for air for the first eddy flow of fuel, produces the fuel-air mixture as for fuel nozzle.Fuel nozzle described in the utility model can be safely, stable, operation efficiently.
The accompanying drawing explanation
Fig. 1 is that the master of a kind of large flow medium and low heat value fuel of the present utility model unit nozzle looks cutaway view; Fig. 2 has shown the conical shell front view of a kind of large flow medium and low heat value fuel unit nozzle; Fig. 3 has shown the top view of a kind of large flow medium and low heat value fuel unit nozzle; Fig. 4 has shown the stereogram of a kind of large flow medium and low heat value fuel unit nozzle.
The specific embodiment
The specific embodiment one: as shown in Fig. 1～4, the described large flow medium and low heat value fuel of present embodiment unit nozzle comprises center oil nozzle 42, described unit nozzle also comprises conical shell 21, integral shroud 31 and sleeve pipe 41, described center oil nozzle 42 is placed in conical shell 21 and the two is coaxial, the port of export (small end) outer wall of conical shell 21 ports of export (small end) inwall and heart oil burner nozzle 42 is connected together, the port of export outer wall of conical shell 21 is provided with conical shell air cyclone 25, the outer surface of conical shell air cyclone 25 is gradually-reducing shape and consistent with the convergent direction of conical shell 21, integral shroud 31 is fixed in conical shell air cyclone 25 port of export outer rims, and the two is coaxial, and end face is concordant, conical shell 21 ports of export are placed in sleeve pipe 41 and between the two and link together by integral shroud 31, the Mixed Zone 11 that the inner space that is arranged in the sleeve pipe 41 on conical shell 21 port of export tops is compressed air and low heat value gas, the fuel openings end of conical shell 21 is provided with first group of fuel openings along circumferentially spaced 23 and second group of fuel openings along circumferentially spaced 24, wherein first group of fuel openings along circumferentially spaced 23 is positioned at conical shell air cyclone 25 downstreams, second group of fuel openings along circumferentially spaced 24 is positioned at conical shell air cyclone 25 inside, between conical shell 21 and center oil nozzle 42, space is middle low heat value gas passage, and first group of fuel openings along circumferentially spaced 23 is injected in Mixed Zone, combustion chamber 11 for the low heat value gas (fuel) that allows the large volume flow, conical shell air cyclone 25 is provided with a plurality of the first air openings 22 along circumferentially spaced, in order to allow compressed air, injects in Mixed Zone, combustion chamber 11, second group of fuel openings along circumferentially spaced 24 is for first with after compressed air tentatively mixes entering low heat value gas again in Mixed Zone, combustion chamber 11, described center oil nozzle 42 comprises atomizing air nozzle body 42-1, oil burner nozzle housing 42-2, support 42-3 and spinning disk 43-4, the profile of atomizing air nozzle body 42-1 and oil burner nozzle housing 42-2 is all tapered, oil burner nozzle housing 42-2 is placed in atomizing air nozzle body 42-1 and the space between the two is the atomizing air passage, spinning disk 43-4 is arranged on the port of export of oil burner nozzle housing 42-2 by support 42-3, fuel oil is by entrance outlet ejection from oil burner nozzle housing 42-2 through spinning disk 43-4 of oil burner nozzle housing 42-2, shear atomization through atomizing air, 11 mix after-combustion with compressed air in Mixed Zone, first group of fuel openings along circumferentially spaced 23 and second group of fuel openings along circumferentially spaced 24 are with the directed flow angle θ obliquely of the center line 100 about conical shell 21
1inject fuel, flow angle θ
1be between 10 ° to 25 °, arrival end (large end) end face of conical shell 21 of take is benchmark, and the axial distance 54 of first group of fuel openings along circumferentially spaced 23 should be greater than conical shell air cyclone 25 top axial distances 53, the axial distance 52 of second group of fuel openings along circumferentially spaced 24 should be between conical shell air cyclone 25 top axial distances 53 and conical shell air cyclone 25 bottom axial distances 51, described the first air openings 22 is with the flow angle θ of center line 100 inclined orientation about conical shell 21
2to Mixed Zone, 11 inject compressed air, flow angle θ
2be between 20 ° to 35 °, have a plurality of the second air openings 32 along circumferentially spaced on described integral shroud 31.
The specific embodiment two: as shown in Fig. 1～4, having a plurality of the second air openings 32 along circumferentially spaced on the described integral shroud 31 of present embodiment is the cross sectional shape of rectangle.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: as shown in Fig. 1～4, the described first group of fuel openings along circumferentially spaced 23 of present embodiment and second group of fuel openings along circumferentially spaced 24 are concentric around the center line 100 of described unit nozzle; First group of fuel openings along circumferentially spaced 23 and second group of fuel openings along circumferentially spaced 24 are oriented and contribute to be not less than 0.4 swirling number in the interior generation in described Mixed Zone 11.Other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment four: as shown in Fig. 1～4, the described first group of a plurality of fuel openings 23 of present embodiment and described second group of a plurality of fuel openings 24 are in the flow angle guiding fuel between about 10 ° to 30 °, and described a plurality of the first air openings 22 is in flow angle between about 25 ° to 40 ° guiding compressed air, is oriented and contributes to be not less than 0.6 swirling number in the interior generation in described Mixed Zone 11.Other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment five: as shown in Fig. 1～4, described the first air openings 22 tools of present embodiment are rectangular cross sectional shape.Other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment six: as shown in Fig. 1～4, described the first air openings 22 tools of present embodiment are rectangular cross sectional shape.Other composition and annexation are identical with the specific embodiment three.
The specific embodiment seven: as shown in Fig. 1～4, described the first air openings 22 tools of present embodiment are rectangular cross sectional shape.Other composition and annexation are identical with the specific embodiment four.
By the above specific embodiment, the utility model be have been described in detail, but be to be understood that, the utility model is not limited to the disclosed embodiments, and on the contrary, various modifications and equivalence that the utility model is intended to cover in the spirit and scope that comprise claims arrange.Therefore, to retaining the purpose of this utility model, in subtlety, other slightly different examples also are suitable for.
Brief introduction of work principle:
Due to easily tempering of hydrogen-rich fuel (middle low heat value gas), spontaneous combustion, so in order to guarantee safety, generally all with fuel oil, light, fuel oil exports high-speed jet by spinning disk from oil burner nozzle, shearing atomization by the atomizing air of high pressure is silk noil, and burn while mixing with compressed air, for example, after unit is elevated to certain load (50%), be switched to gradually middle low heat value gas and (reduce gradually fuel oil and atomization air flow, increase the middle low heat value gas of corresponding calorific value), until fuel oil cuts off fully, the atomizing air passage remains with the seldom purging air of flow, medium and low heat value fuel is from fuel openings 23, inject to 24 inclined orientation Mixed Zone 11, compressed air from air openings (cyclone) inclined orientation inject Mixed Zone 11, the two rotation direction is identical, in Mixed Zone 11, rotation mixes, generation is greater than the stronger eddy flow of 0.6 left-right rotary fluxion, stronger eddy flow contributes to medium and low heat value fuel and compressed-air actuated blending, shorten blending time and stroke distances, contribute to produce stronger recirculating zone, generate shorter the stabilizing the flame of length.Be raised at full capacity to unit.
Claims (7)
1. a large flow medium and low heat value fuel unit nozzle, described unit nozzle comprises center oil nozzle (42), it is characterized in that: described unit nozzle also comprises conical shell (21), integral shroud (31) and sleeve pipe (41), described center oil nozzle (42) is placed in conical shell (21) and the two is coaxial, the port of export outer wall of conical shell (21) port of export inwall and heart oil burner nozzle (42) is connected together, the port of export outer wall of conical shell (21) is provided with conical shell air cyclone (25), the outer surface of conical shell air cyclone (25) is gradually-reducing shape and consistent with the convergent direction of conical shell (21), integral shroud (31) is fixed in conical shell air cyclone (25) port of export outer rim, and the two is coaxial, and end face is concordant, conical shell (21) port of export is placed in sleeve pipe (41) and between the two and links together by integral shroud (31), the Mixed Zone (11) that the inner space that is arranged in the sleeve pipe (41) on conical shell (21) port of export top is compressed air and low heat value gas, the fuel openings end of conical shell (21) is provided with first group of fuel openings along circumferentially spaced (23) and second group of fuel openings along circumferentially spaced (24), wherein first group of fuel openings along circumferentially spaced (23) is positioned at conical shell air cyclone (25) downstream, second group of fuel openings along circumferentially spaced (24) is positioned at conical shell air cyclone (25) inside, between conical shell (21) and center oil nozzle (42), space is middle low heat value gas passage, first group of fuel openings along circumferentially spaced (23) is injected in Mixed Zone, combustion chamber (11) for the low heat value gas that allows the large volume flow, conical shell air cyclone (25) is provided with a plurality of the first air openings along circumferentially spaced (22), in order to allow compressed air, injects in Mixed Zone, combustion chamber (11), second group of fuel openings along circumferentially spaced (24) is for first with after compressed air tentatively mixes entering low heat value gas again in Mixed Zone, combustion chamber (11), described center oil nozzle (42) comprises atomizing air nozzle body (42-1), oil burner nozzle housing (42-2), support (42-3) and spinning disk (43-4), the profile of atomizing air nozzle body (42-1) and oil burner nozzle housing (42-2) is all tapered, oil burner nozzle housing (42-2) is placed in atomizing air nozzle body (42-1) and the space between the two is the atomizing air passage, spinning disk (43-4) is arranged on the port of export of oil burner nozzle housing (42-2) by support (42-3), fuel oil is by entrance outlet ejection from oil burner nozzle housing (42-2) through spinning disk (43-4) of oil burner nozzle housing (42-2), shear atomization through atomizing air, with compressed air in Mixed Zone (11) mix after-combustion, first group of fuel openings along circumferentially spaced (23) and second group of fuel openings along circumferentially spaced (24) are with the center line about conical shell (21) (100) directed flow angle θ obliquely
1inject fuel, flow angle θ
1be between 10 ° to 25 °, the arrival end end face of conical shell (21) of take is benchmark, and the axial distance (54) of first group of fuel openings along circumferentially spaced (23) should be greater than conical shell air cyclone (25) top axial distance (53), the axial distance (52) of second group of fuel openings along circumferentially spaced (24) should be between conical shell air cyclone (25) top axial distance (53) and conical shell air cyclone (25) bottom axial distance (51), described the first air openings (22) is with the flow angle θ of the center line about conical shell (21) (100) inclined orientation
2to Mixed Zone, (11) inject compressed air, flow angle θ
2be between 20 ° to 35 °, have a plurality of the second air openings along circumferentially spaced (32) on described integral shroud (31).
2. a kind of large flow medium and low heat value fuel according to claim 1 unit nozzle, is characterized in that: have a plurality of the second air openings along circumferentially spaced (32) on described integral shroud (31) for the cross sectional shape of rectangle.
3. a kind of large flow medium and low heat value fuel according to claim 1 and 2 unit nozzle is characterized in that: described first group of fuel openings along circumferentially spaced (23) and second group of fuel openings along circumferentially spaced (24) are concentric around the center line (100) of described unit nozzle; First group of fuel openings along circumferentially spaced (23) and second group of fuel openings along circumferentially spaced (24) are oriented and contribute to produce the swirling number that is not less than 0.4 in described Mixed Zone (11).
4. a kind of large flow medium and low heat value fuel according to claim 1 and 2 unit nozzle, it is characterized in that, described first group of a plurality of fuel openings (23) and described second group of a plurality of fuel openings (24) are in the flow angle guiding fuel between about 10 ° to 30 °, and described a plurality of the first air openings (22) are in flow angle between about 25 ° to 40 ° guiding compressed air, are oriented and contribute to generation described Mixed Zone (11) in to be not less than 0.6 swirling number.
5. a kind of large flow medium and low heat value fuel according to claim 1 and 2 unit nozzle, it is characterized in that: described the first air openings (22) tool is rectangular cross sectional shape.
6. a kind of large flow medium and low heat value fuel according to claim 3 unit nozzle, it is characterized in that: described the first air openings (22) tool is rectangular cross sectional shape.
7. a kind of large flow medium and low heat value fuel according to claim 4 unit nozzle, it is characterized in that: described the first air openings (22) tool is rectangular cross sectional shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220719712 CN203010676U (en) | 2012-12-24 | 2012-12-24 | Unit nozzle for mass-flow medium-and-low heat value fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220719712 CN203010676U (en) | 2012-12-24 | 2012-12-24 | Unit nozzle for mass-flow medium-and-low heat value fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203010676U true CN203010676U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220719712 Expired - Lifetime CN203010676U (en) | 2012-12-24 | 2012-12-24 | Unit nozzle for mass-flow medium-and-low heat value fuel |
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| CN (1) | CN203010676U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180214A (en) * | 2015-09-23 | 2015-12-23 | 哈尔滨工程大学 | Double-fuel nozzle and cyclone integrated structure with low-heating-value gas combustion function |
| CN109915826A (en) * | 2019-03-19 | 2019-06-21 | 苏州墨华高科信息技术有限公司 | A kind of nozzle that rotation eddy flow slot is combined with spin chamber |
| CN111964097A (en) * | 2020-08-21 | 2020-11-20 | 江苏科技大学 | Combined staged combustion chamber oil supply device with lean oil premixing and pre-evaporation functions and working method thereof |
| CN112902226A (en) * | 2021-03-11 | 2021-06-04 | 西北工业大学 | Fuel oil evaporation type flame tube |
-
2012
- 2012-12-24 CN CN 201220719712 patent/CN203010676U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180214A (en) * | 2015-09-23 | 2015-12-23 | 哈尔滨工程大学 | Double-fuel nozzle and cyclone integrated structure with low-heating-value gas combustion function |
| CN105180214B (en) * | 2015-09-23 | 2017-10-03 | 哈尔滨工程大学 | A kind of dual fuel nozzle of incendivity low-BTU gas and cyclone integral structure |
| CN109915826A (en) * | 2019-03-19 | 2019-06-21 | 苏州墨华高科信息技术有限公司 | A kind of nozzle that rotation eddy flow slot is combined with spin chamber |
| CN111964097A (en) * | 2020-08-21 | 2020-11-20 | 江苏科技大学 | Combined staged combustion chamber oil supply device with lean oil premixing and pre-evaporation functions and working method thereof |
| CN111964097B (en) * | 2020-08-21 | 2022-05-10 | 江苏科技大学 | Combined staged combustion chamber oil supply device with lean oil premixing and pre-evaporation functions and working method thereof |
| CN112902226A (en) * | 2021-03-11 | 2021-06-04 | 西北工业大学 | Fuel oil evaporation type flame tube |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |
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| CX01 | Expiry of patent term |