CN204665354U - A kind of fuel gas nozzle - Google Patents
A kind of fuel gas nozzle Download PDFInfo
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- CN204665354U CN204665354U CN201520175956.5U CN201520175956U CN204665354U CN 204665354 U CN204665354 U CN 204665354U CN 201520175956 U CN201520175956 U CN 201520175956U CN 204665354 U CN204665354 U CN 204665354U
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- fuel gas
- fuel
- gas outlet
- distribution plate
- flow distribution
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Abstract
The utility model relates to gas turbine technology field, provide a kind of fuel gas nozzle, flow distribution plate is provided with in hybrid channel, flow distribution plate to be fixed on fuel swirl device and with air cyclone from, the leading portion of hybrid channel is divided into inner-layer channel and outer layer channel by flow distribution plate, and inner-layer channel and outer passage are communicated with the first fuel gas outlet with the second fuel gas outlet respectively.The fuel gas nozzle that the utility model provides, is divided into inner-layer channel and outer layer channel by flow distribution plate by hybrid channel leading portion, thus solves the problem that low heating value fuel gas amasss the air intake place air inlet difficulty that flow brings greatly.
Description
Technical field
The utility model relates to gas turbine technology field, particularly relates to the nozzle that a kind of gas turbine combustion fuel gas uses, relates more specifically to a kind of fuel gas nozzle being suitable for low calorie fuels gas.
Background technology
For the low calorie fuels such as synthesis gas from coal gasification, blast furnace gas, coke-stove gas, chemical industry periodic off-gases, town gas, its gas componant is complicated, and volume calorific value is low, if directly can cause larger pollution to flare system discharge.By contrast, gas turbine combustion is adopted to become a more excellent and Application way for environmental protection, in addition, can also such low calorie fuels gas of flexible utilization, be translated into electric energy or heat energy.
For common gas-turbine combustion chamber, use nozzle to adopt the transformation of the exotic fuels gas jets of technical maturity to make during its lower heat of combustion fuel gas, reforming mode is the size in fuel metering hole thus makes it mate with the volume flow of fuel.Because low calorie fuels gas calorific value is lower, in order to ensure gas turbine rated power, the volume flow of low calorie fuels gas will than exotic fuels, and such as natural gas is much bigger, therefore, brings larger challenge to the design of low calorie fuels gas jets.
Be illustrated in figure 1 the improved low calorie fuels gas jets of typical exotic fuels gas jets.This nozzle comprises exotic fuels gas passage 1, low calorie fuels gas passage 2, fuel swirl device 5 and air cyclone 6, fuel swirl device 5 is provided with exotic fuels gas outlet 7 and low calorie fuels gas outlet 8, air cyclone 6 is provided with air intake 3, the formation hybrid channel, space 4 between fuel swirl device 5 and air cyclone 6.Exotic fuels gas passage 1 provides stable exotic fuels gas, can ensure stable combustibility when igniting and underload.When load raises, take fire low calorie fuels gas.But, in order to improve the volume flow of low calorie fuels gas, low calorie fuels gas is made to export 8 areas comparatively large, because air intake 3 just exports 8 sides at low calorie fuels gas, the large volume flow of low calorie fuels gas obviously can affect the air inlet of air, and then affects the combustibility of head.
Therefore, for above deficiency, need to provide a kind of fuel gas nozzle being suitable for low calorie fuels gas.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is to provide a kind of fuel gas nozzle, by flow distribution plate, hybrid channel leading portion is divided into inner-layer channel and outer layer channel, thus solves the problem that low heating value fuel gas amasss the air intake place air inlet difficulty that flow brings greatly.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of fuel gas nozzle, comprise the coaxial fuel gas outer tube arranged, pipe in fuel gas, fuel swirl device and air cyclone, described fuel swirl device two ends are connected with fuel gas outer tube and air cyclone respectively, in described fuel gas, pipe is through after described fuel gas outer tube, insert in described fuel swirl device, in the inwall of described fuel gas outer tube and described fuel gas pipe outer wall between form low calorie fuels gas passage, exotic fuels gas passage is formed inside pipe in described fuel gas, hybrid channel is formed between the outer wall of described fuel swirl device and the inwall of described air cyclone, flow distribution plate is provided with in described hybrid channel, described flow distribution plate to be fixed on described fuel swirl device and with described air cyclone from, the leading portion of hybrid channel is divided into inner-layer channel and outer layer channel by described flow distribution plate,
Described air cyclone is provided with mixed gas outlet and air intake, described mixed gas outlet is arranged on the end face of described air cyclone, described air intake is arranged on the sidewall of described air cyclone, and described air intake is communicated to described mixed gas outlet by described outer layer channel; Described fuel swirl device is provided with the first fuel gas outlet and the outlet of the second fuel gas, and described first fuel gas outlet is communicated with described low calorie fuels gas passage and described mixed gas outlet by described inner-layer channel.
Preferably, foregoing fuel cyclone is flared structure, comprises expansion sidewall and serrated end end face, and it is inner that described expansion sidewall and serrated end end face are positioned at described air cyclone, and in described fuel gas, pipe is inserted on the inwall of described expansion sidewall.
Preferably, aforementioned second fuel gas outlet, for being arranged at the inclined hole on described serrated end end face, is uniformly distributed circumferentially on described serrated end end face at least one row of described second fuel gas outlet.
Preferably, aforementioned first fuel gas outlet is for being arranged at the inclined hole on described expansion sidewall, and described first fuel gas outlet is circumferentially distributed on described expansion sidewall.
Preferably, in foregoing fuel gas, pipe and described expansion sidewall are tightly connected.
Preferably, aforementioned mixed gas outlet area is greater than the first fuel gas discharge area and the second fuel gas discharge area sum.
Preferably, the ratio of aforementioned inner-layer channel and outer layer channel circulation area is 0.3-1.
Preferably, aforementioned flow distribution plate end-to-end distance is 10-25mm from the distance of air cyclone end.
Preferably, the thickness of aforementioned flow distribution plate is 0.5-2mm.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages:
The fuel gas nozzle that the utility model provides, flow distribution plate is provided with in hybrid channel, flow distribution plate to be fixed on fuel swirl device and with air cyclone from, the leading portion of hybrid channel is divided into inner-layer channel and outer layer channel by flow distribution plate, and inner-layer channel and outer passage are communicated with the first fuel gas outlet with the second fuel gas outlet respectively.Hybrid channel leading portion is divided into inner-layer channel and outer layer channel by flow distribution plate by the utility model, inside and outside layer passage flow into combustion chamber for low calorie fuels gas and air respectively, thus reduce low calorie fuels throughput greatly for the impact of head air inlet, ensure enough air and participate in head burning, thus make sufficient combustion contribute to improving efficiency of combustion and reducing pollutant emission.
Accompanying drawing explanation
Fig. 1 is existing low calorie fuels gas jets structural representation;
Fig. 2 is the structural representation of fuel gas nozzle of the present utility model.
In figure: 1: high heating value blast tube; 2: fuel gas with low heat value passage; 3: air intake; 4: hybrid channel; 41: mixed gas outlet; 42: inner-layer channel; 43: outer layer channel; 5: fuel swirl device; 6: air cyclone; 7: the second fuel gas outlets; 8: the first fuel gas outlets; 9: flow distribution plate.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
As shown in Figure 2, a kind of fuel gas nozzle that the utility model embodiment provides, comprise coaxial the fuel gas outer tube, the interior pipe of fuel gas, fuel swirl device 5 and the air cyclone 6 that arrange, fuel swirl device 5 two ends are connected with fuel gas outer tube and air cyclone 6 respectively, in fuel gas, pipe is through after fuel gas outer tube, insert in fuel swirl device 5, in the inwall of fuel gas outer tube and fuel gas pipe outer wall between form low calorie fuels gas passage 2, form exotic fuels gas passage 1 in fuel gas inside pipe.
Hybrid channel 4 is formed between the outer wall of fuel swirl device 5 and the inwall of air cyclone 6, hybrid channel 4 is circular passage, flow distribution plate 9 is provided with in hybrid channel 4, flow distribution plate 9 to be fixed on fuel swirl device 5 and with air cyclone 6 from, the leading portion of hybrid channel 4 is divided into inner-layer channel 42 and outer layer channel 43 by flow distribution plate 9, wherein hybrid channel 4 leading portion be diagram in left side near one end of fuel swirl device 5; In order to ensure head fuel and the appropriate mixing ratio of air, preferably, inner-layer channel 42 is 0.3-1 with the ratio of outer layer channel 43 circulation area.
Because preliminary being mixed with before entering burner inner liner of fuel and air helps Thorough combustion, the end of flow distribution plate 9 should not exceed air cyclone 6 end; If but flow distribution plate 9 is too short, then do not have the effect of shunting.Preferably, flow distribution plate 9 end-to-end distance is 10-25mm from the distance of air cyclone 6 end.
In order to reduce the interference of flow distribution plate 9 for air current flow in hybrid channel 4, and flow distribution plate 9 needs enough intensity and life-span, and the thickness of preferred flow distribution plate 9 is 0.5-2mm.
Fuel swirl device 5 is flared structure, comprises expansion sidewall and serrated end end face, and it is inner that expansion sidewall and serrated end end face are positioned at air cyclone 6, and in fuel gas, pipe is inserted on the inwall of expansion sidewall.In fuel gas, pipe is tightly connected with expansion sidewall, in the present embodiment, adopts sealing ring to seal the end of pipe in fuel gas and expansion sidewall.
Air cyclone 6 is provided with mixed gas outlet 41 and air intake 3, mixed gas outlet 41 is ring exit, mixed gas outlet 41 is arranged on the end face of air cyclone 6, air intake 3 is arranged on the sidewall of air cyclone 6, and air intake 3 is communicated to mixed gas outlet 41 by outer layer channel 43, air intake 3 is skewed slot, and its preferred cross sectional shape is rectangle or square; Fuel swirl device 5 is provided with the first fuel gas outlet 8 and the second fuel gas outlet 7, first fuel gas outlet 8 is communicated with low calorie fuels gas passage 2 and mixed gas outlet 41 by inner-layer channel 42.
Second fuel gas outlet 7 is for being arranged at the inclined hole on serrated end end face, and the second fuel gas is uniformly distributed circumferentially on serrated end end face with exporting 7 at least one rows.First fuel gas outlet 8 is for being arranged at the inclined hole on expansion sidewall, and the first fuel gas outlet 8 is circumferentially distributed on expansion sidewall.The cross section of above-mentioned inclined hole is preferably circular or oval.
In order to more accurately control fuel and air mass flow, usually orifice size can be arranged on independence and on the controlled geometric properties of area.In the present embodiment, the face of damming of low calorie fuels gas is the first fuel gas outlet 8, and the face of damming of air is air intake 3.Preferably, mixed gas outlet 41 area is greater than the first fuel gas and exports 8 areas and the second fuel gas exports 7 area sums.
During use, the operation principle of the present embodiment is as follows:
Exotic fuels gas passage 1 provides stable exotic fuels gas can ensure stable combustibility when igniting and underload.When load is elevated to more than 50%, low calorie fuels gas passage 2 starts to provide low calorie fuels gas.In order to improve the volume flow of ground calorific value fuel gas, it is larger that the first fuel gas exports 8 areas.Meanwhile, compared to the low calorie fuels gas fuel nozzle that tradition adopts ripe exotic fuels gas jets to transform, mixed gas outlet 41 area of the utility model nozzle is larger, can not limit the flow of air or fuel gas.In addition, by arranging flow distribution plate 9 in hybrid channel 4, hybrid channel 4 leading portion is divided into inner-layer channel 42 and outer layer channel 43, inside and outside layer passage flow into combustion chamber for low calorie fuels gas and air respectively, thus reduce low heating value fuel gas and amass flow greatly for the impact of head air inlet, ensure enough air and participate in head burning.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a fuel gas nozzle, comprise the coaxial fuel gas outer tube arranged, pipe in fuel gas, fuel swirl device and air cyclone, it is characterized in that: described fuel swirl device two ends are connected with fuel gas outer tube and air cyclone respectively, in described fuel gas, pipe is through after described fuel gas outer tube, insert in described fuel swirl device, in the inwall of described fuel gas outer tube and described fuel gas pipe outer wall between form low calorie fuels gas passage, exotic fuels gas passage is formed inside pipe in described fuel gas, hybrid channel is formed between the outer wall of described fuel swirl device and the inwall of described air cyclone, flow distribution plate is provided with in described hybrid channel, described flow distribution plate to be fixed on described fuel swirl device and with described air cyclone from, the leading portion of hybrid channel is divided into inner-layer channel and outer layer channel by described flow distribution plate,
Described air cyclone is provided with mixed gas outlet and air intake, described mixed gas outlet is arranged on the end face of described air cyclone, described air intake is arranged on the sidewall of described air cyclone, and described air intake is communicated to described mixed gas outlet by described outer layer channel; Described fuel swirl device is provided with the first fuel gas outlet and the outlet of the second fuel gas, and described first fuel gas outlet is communicated with described low calorie fuels gas passage and described mixed gas outlet by described inner-layer channel.
2. fuel gas nozzle according to claim 1, it is characterized in that: described fuel swirl device is flared structure, comprise expansion sidewall and serrated end end face, it is inner that described expansion sidewall and serrated end end face are positioned at described air cyclone, and in described fuel gas, pipe is inserted on the inwall of described expansion sidewall.
3. fuel gas nozzle according to claim 2, is characterized in that: described second fuel gas outlet, for being arranged at the inclined hole on described serrated end end face, is uniformly distributed circumferentially on described serrated end end face at least one row of described second fuel gas outlet.
4. fuel gas nozzle according to claim 2, is characterized in that: described first fuel gas outlet is for being arranged at the inclined hole on described expansion sidewall, and described first fuel gas outlet is circumferentially distributed on described expansion sidewall.
5. fuel gas nozzle according to claim 2, is characterized in that: in described fuel gas, pipe and described expansion sidewall are tightly connected.
6. fuel gas nozzle according to claim 1, is characterized in that: described mixed gas outlet area is greater than the first fuel gas discharge area and the second fuel gas discharge area sum.
7. fuel gas nozzle according to claim 1, is characterized in that: the ratio of described inner-layer channel and outer layer channel circulation area is 0.3-1.
8. fuel gas nozzle according to claim 1, is characterized in that: described flow distribution plate end-to-end distance is 10-25mm from the distance of air cyclone end.
9. fuel gas nozzle according to claim 1, is characterized in that: the thickness of described flow distribution plate is 0.5-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175956.5U CN204665354U (en) | 2015-03-26 | 2015-03-26 | A kind of fuel gas nozzle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520175956.5U CN204665354U (en) | 2015-03-26 | 2015-03-26 | A kind of fuel gas nozzle |
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| CN204665354U true CN204665354U (en) | 2015-09-23 |
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| CN201520175956.5U Active CN204665354U (en) | 2015-03-26 | 2015-03-26 | A kind of fuel gas nozzle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737401A (en) * | 2018-12-28 | 2019-05-10 | 西安交通大学 | A kind of low NO being mixed and burned using lean gas/flammable cyclonic current |
-
2015
- 2015-03-26 CN CN201520175956.5U patent/CN204665354U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109737401A (en) * | 2018-12-28 | 2019-05-10 | 西安交通大学 | A kind of low NO being mixed and burned using lean gas/flammable cyclonic current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Fuel gas nozzle Effective date of registration: 20161104 Granted publication date: 20150923 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191211 Granted publication date: 20150923 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191224 Address after: 102209 Beijing Changping District in the future of the national electric investment group Park in the future science city south of Beijing Patentee after: China United heavy-duty gas turbine technology Co., Ltd. Address before: 100084, Beijing, Haidian District science and Technology Park, Tsinghua Science and technology building, block C, 10 Patentee before: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. |
|
| TR01 | Transfer of patent right |