CN204880216U - Discrete synthetic gas nozzle and gas turbine who sprays - Google Patents
Discrete synthetic gas nozzle and gas turbine who sprays Download PDFInfo
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- CN204880216U CN204880216U CN201520398650.6U CN201520398650U CN204880216U CN 204880216 U CN204880216 U CN 204880216U CN 201520398650 U CN201520398650 U CN 201520398650U CN 204880216 U CN204880216 U CN 204880216U
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Abstract
The utility model relates to a power equipment technical field especially relates to a discrete synthetic gas nozzle and gas turbine who sprays. The utility model provides a discrete synthetic gas nozzle that sprays is provided with a plurality of cyclic annular fuel intake pipe that distribute that are in peripheral passageway, the cross sectional shape of fuel intake pipe is the fan annular, therefore the air forms annular whirl in peripheral air duct, synthetic gas fuel arranges the fuel intake pipe in peripheral air duct from a plurality of circumference and outwards sprays, sprays the annular air whirl that can sprayed out from peripheral air duct around a plurality of strands of fan -shaped synthetic gas effluxs coming out and surrounds, and matching annular air whirl that fan -shaped synthetic gas efflux can be fine has increased the area of contact of fuel with the air, has improved the mixing effect of fuel with the air, can reduce the peak flame temperature of combustion area, and then reduce NOx's formation volume, in addition, annular whirl can form stable flame stabilizing district in the nozzle low reaches.
Description
Technical field
The utility model relates to chain drive technical field, particularly relates to a kind of synthesis gas nozzle and gas turbine of discrete injection.
Background technology
At present, along with energy scarcity and the whole world are to the attention of environmental protection problem, various countries propose higher requirement to gas-turbine combustion chamber, not only require that combustion chamber can use a greater variety of fuel, require that the discharge of pollutant is lower and efficiency of combustion is higher simultaneously.Except natural gas, require that gas-turbine combustion chamber can use some inferior fuel gas, the synthesis gas that these inferior fuel gas are mainly manufactured by Coal Chemical Industry; In addition, require that gas turbine is between 50% and above loading zone, combustion chamber discharge can maintain reduced levels, keeps higher efficiency of combustion simultaneously.
The calorific value of synthesis gas is lower and wobbe index is lower, in addition, has based on the larger hydrogen content of molar fraction; Because hydrogen has the fast characteristic of burning velocity, namely the characteristic chemical time is very short, makes synthesis gas have higher fuel reaction.Synthesis gas is because wobbe index is low and fuel reaction is high, adopt during premixed combustion mode and easily produce spontaneous combustion, tempering problem, pre-mixing apparatus ablation is caused to damage, therefore be difficult to adopt conventional premix DLN combustion system, known syngas combustion system generally adopts the burner based on diffusion combustion mode, the spontaneous combustion avoiding premixed combustion to bring, tempering risk.The peak flame temperature of diffusion combustion mode is higher, this will increase the discharge of NOx greatly, although adopt the method for spraying diluent to combustion zone to reduce peak temperature, but the effect reducing NOx is limited, and along with more and more stricter to the regulation of gas turbine NOx emission, this employing diffusion combustion mode sprays diluent simultaneously method to combustion zone is difficult to meet lower NOx emission index, and simultaneity factor and equipment complexity, operating cost is higher.
In patent CN101424406A, have employed a kind of DLN burner of premixed combustion mode, synthesis gas is divided into independent two-stage, wobbe index and the fuel reaction of every one-level fuel artificially adjust, adjust to the preset value in certain limit, this preset value guarantees that synthesis gas fuel spontaneous combustion tempering can not occur in pre-mixing apparatus.Still there is the risk of spontaneous combustion tempering in said method, due to synthesis gas can not adjust in wobbe index and fuel reaction adjustment completely evenly, likely there is wobbe index and the higher region of fuel reaction, in pre-mixing apparatus, there is the risk of spontaneous combustion, tempering; In addition, classification carried out to synthesis gas and two-stage fuel is carried out to the artificial adjustment of wobbe index and fuel reaction, adding the complexity of Dynamic System and the complexity of equipment.
Therefore, for above deficiency, need a kind of can reliably burn synthesis gas, disposal of pollutants is low, efficiency of combustion is high, structure is simple, maintain and replace is easy to discrete injection synthesis gas nozzle and gas turbine.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is: during traditional gas turbine nozzle burn synthesis gas, pollutant emission exceeds standard, and there is tempering, spontaneous combustion equivalent risk.
(2) technical scheme
In order to solve the problems of the technologies described above, the synthesis gas nozzle that the utility model provides a kind of discrete injection comprises nozzle body, the peripheral air passage of the ring-type being provided with central air passage in described nozzle body and coaxially arrange with described central air passage, multiple ring-shaped distributed fuel air pipe is provided with in described peripheral channel, the cross sectional shape of described fuel air pipe is fan annular, the inwall of described peripheral air passage is provided with the internal diameter air admission hole that multiple and peripheral inlet channel is communicated with, the outer wall of described peripheral air passage is provided with the external diameter air admission hole that multiple and peripheral inlet channel is communicated with, the axis of described external diameter air admission hole and the axis of described internal diameter air admission hole all not with the axes intersect of described central air passage.
Wherein, the separating part of ring-type is provided with in described peripheral air passage, peripheral air channel partition is become the first air duct and the second air duct by described separating part, and described internal diameter air admission hole is communicated with described first air duct, and described external diameter air admission hole is communicated with described second air duct.
Wherein, fuel air pipe is provided with in described first air duct and the second air duct.
Wherein, the gripper shoe for supporting fuel air pipe is provided with in described first air duct and the second air duct.
Wherein, the cross sectional shape of described internal diameter air admission hole and described external diameter air admission hole is rectangle, circle or oval.
Wherein, cross sectional shape is the central angle of the described fuel air pipe of fan annular is 5 °-45 °.
Wherein, an end face of described central air passage is provided with multiple end wall Cooling Holes.
Wherein, described end wall Cooling Holes is uniformly distributed.
Wherein, described end wall Cooling Holes is straight hole or inclined hole.
The utility model additionally provides a kind of gas turbine, includes the synthesis gas nozzle of the discrete injection described in above-mentioned any one.
(3) beneficial effect
Technique scheme tool of the present utility model has the following advantages: the utility model provides a kind of synthesis gas nozzle of discrete injection, the peripheral air passage of central air passage and the coaxial ring-type arranged is provided with in nozzle body, multiple ring-shaped distributed fuel air pipe is provided with in described peripheral channel, the cross sectional shape of described fuel air pipe is fan annular, and the axis of the described external diameter air admission hole on it and the axis of described internal diameter air admission hole all not with the axes intersect of described nozzle body, therefore air forms annular eddy flow in peripheral air duct; The fuel air inlet pipe that synthesis gas fuel is arranged circumferentially in peripheral air passage from several is outwards sprayed, the fan-shaped synthesis gas Around Jet of the some stocks ejected can be surrounded by from peripheral air channel injection annular air eddy flow out, fan-shaped synthesis gas jet can be good at coupling annular air eddy flow, increase the contact area of fuel and air, improve the mixing effect of fuel and air, the peak flame temperature of combustion zone can be reduced, and then reduce the growing amount of NOx; In addition, annular eddy flow can form stable flame stabilizing zone in nozzle downstream.
Accompanying drawing explanation
The advantage of the above-mentioned and/or additional aspect of the utility model will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the stereogram of the synthesis gas nozzle of discrete injection described in the utility model embodiment;
Fig. 2 is the cross-sectional cut-away structural representation of the synthesis gas nozzle of discrete injection described in the utility model embodiment;
Fig. 3 is the longitudinal section sectional structure schematic diagram of the synthesis gas nozzle of discrete injection described in the utility model embodiment.
Corresponding relation wherein in Fig. 1 and Fig. 3 between Reference numeral and component names is:
1, nozzle body, 11, central air passage, 111, end wall Cooling Holes, the 121, first air duct, the 122, second air duct, 123, fuel air pipe, 124, gripper shoe, 125, external diameter air admission hole, 126, internal diameter air admission hole, 127, separating part.
Detailed description of the invention
In description of the present utility model, it should be noted that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.In addition, in description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more
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 1 to Figure 3, the utility model provides a kind of synthesis gas nozzle of discrete injection, comprise nozzle body 1, central air passage 11 and the peripheral air passage with the coaxial ring-type arranged of described central air passage 11 is provided with in described nozzle body 1, multiple ring-shaped distributed fuel air pipe 123 is provided with in described peripheral channel, the cross sectional shape of described fuel air pipe 123 is fan annular, the inwall of described peripheral air passage is provided with the internal diameter air admission hole 126 that multiple and peripheral inlet channel is communicated with, the outer wall of described peripheral air passage is provided with the external diameter air admission hole 125 that multiple and peripheral inlet channel is communicated with, the axis of described external diameter air admission hole 125 and the axis of described internal diameter air admission hole 126 all not with the axes intersect of described central air passage 11.The synthesis gas nozzle of the discrete injection that the utility model provides, due to the axis of described external diameter air admission hole 125 and described internal diameter air admission hole 126 axis all not with the axes intersect of described nozzle body 1, therefore air forms annular eddy flow in peripheral air duct; The fuel air inlet pipe 123 that synthesis gas fuel is arranged circumferentially in peripheral air passage from several is outwards sprayed, the fan-shaped synthesis gas Around Jet of the some stocks ejected can be surrounded by from peripheral air channel injection annular air eddy flow out, fan-shaped synthesis gas jet can be good at coupling annular air eddy flow, increase the contact area of fuel and air, improve the mixing effect of fuel and air, the peak flame temperature of combustion zone can be reduced, and then reduce the growing amount of NOx; In addition, annular eddy flow can form stable flame stabilizing zone in nozzle downstream.
Particularly, described peripheral air passage is the circular passage of one end open, the diapire of described peripheral air passage offers the gripper shoe 124 for installing fuel air pipe 123, preferably, the separating part 127 of ring-type is provided with in described peripheral air passage, peripheral air channel partition is become the first air duct 121 and the second air duct 122 by described separating part 127, described internal diameter air admission hole 126 is communicated with described first air duct 121, described external diameter air admission hole is communicated with described second air duct 122, wherein, the cross sectional shape of internal diameter air admission hole 126 and described external diameter air admission hole 125 is rectangle, circular or oval, be provided with fuel air pipe 123 in described first air duct 121 and the second air duct 122, accordingly, in the first air duct 121 and the second air duct 122, be provided with gripper shoe 124.
It should be noted that, in the above-described embodiments, separating part 127 can not be set, multiple separating part 127 also can be set, become multiple by peripheral air channel partition, and fuel air pipe 123 is set in each passage, the mixing of air and synthesis gas fuel can be made like this evenly, contact more abundant, thus the peak flame temperature of combustion zone can be reduced, promote the efficiency of fuel combustion, make burning more abundant, reduce the discharge of NOx pollutant.
Preferably, cross sectional shape is the central angle of the described fuel air pipe 123 of fan annular is 5 °-45 °, and the inlet channel simultaneously in fuel air pipe 123 is similarly fan annular, and its central angle is identical with fuel air pipe 123.
An end face of described central air passage 11 is provided with multiple hole and is uniformly distributed end wall Cooling Holes 111, described end wall Cooling Holes 111 is also can be able to be both inclined hole for straight hole, its cross sectional shape can be rectangle, circular or oval, effectively can cool nozzle body 1 by arranging end wall Cooling Holes 111, end wall Cooling Holes 111 is provided with multiple and is uniformly distributed simultaneously, combustion flame is enable to be suspended on the front end face of central air passage 11, can ensure that flame can not blow away by the air sprayed from end wall Cooling Holes 111, guarantee the stability of flame, also flame can not be allowed to be attached to damage end wall causing nozzle simultaneously.
The utility model additionally provides a kind of gas turbine, include the synthesis gas nozzle of the discrete injection described in above-mentioned any embodiment, nozzle on it increases the contact area of fuel and air, improve the mixing effect of fuel and air, the peak flame temperature of combustion zone can be reduced, and then reduce the growing amount of NOx; In addition, annular eddy flow can form stable flame stabilizing zone in nozzle downstream, can promote efficiency and the environmental protection efficiency of whole gas turbine.
The operation principle of the synthesis gas nozzle of the discrete injection that the utility model provides is illustrated below in conjunction with accompanying drawing:
Air enters annular peripheral air passage from internal diameter air admission hole 126, external diameter air admission hole 125, due to the axis of internal diameter air admission hole 126, external diameter air admission hole 125 and central air passage 11 axis non-intersect, air forms annular eddy flow in peripheral air duct, the fuel air pipe 123 that synthesis gas fuel is arranged circumferentially in peripheral air passage from several outwards sprays, fuel channel cross section in fuel air pipe 123 is fan annular, the some strands of annular synthesis gas fuel jets of fan ejected from fuel channel can be surrounded by from peripheral air channel injection annular air eddy flow out, the synthesis gas fuel jet of fan annular can be good at coupling annular air eddy flow, increase the contact area of synthesis gas fuel and air, improve the mixing effect of fuel and air, the peak flame temperature of combustion zone can be reduced, and then reduce the growing amount of NOx, in addition, annular eddy flow can form stable flame stabilizing zone in nozzle downstream, and the utility model adopts some discrete fan-shaped fuel spout burner oils, strengthens the mixed effect of fuel-air, effectively achieves the object of combustion with reduced pollutants.
In sum, the utility model provides a kind of synthesis gas nozzle of discrete injection, the peripheral air passage of central air passage 11 and the coaxial ring-type arranged is provided with in nozzle body 1, multiple ring-shaped distributed fuel air pipe is provided with in described peripheral channel, the cross sectional shape of described fuel air pipe is fan annular, and the axis of the described external diameter air admission hole on it and the axis of described internal diameter air admission hole all not with the axes intersect of described nozzle body 1, therefore air forms annular eddy flow in peripheral air duct; The fuel air inlet pipe that synthesis gas fuel is arranged circumferentially in peripheral air passage from several is outwards sprayed, the fan-shaped synthesis gas Around Jet of the some stocks ejected can be surrounded by from peripheral air channel injection annular air eddy flow out, fan-shaped synthesis gas jet can be good at coupling annular air eddy flow, increase the contact area of fuel and air, improve the mixing effect of fuel and air, the peak flame temperature of combustion zone can be reduced, and then reduce the growing amount of NOx; In addition, annular eddy flow can form stable flame stabilizing zone in nozzle downstream.
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 (10)
1. the synthesis gas nozzle of a discrete injection, it is characterized in that: comprise nozzle body (1), central air passage (11) and the peripheral air passage with the coaxial ring-type arranged of described central air passage (11) is provided with in described nozzle body (1), multiple ring-shaped distributed fuel air pipe (123) is provided with in described peripheral channel, the cross sectional shape of described fuel air pipe (123) is fan annular, the inwall of described peripheral air passage is provided with the internal diameter air admission hole (126) that multiple and peripheral inlet channel is communicated with, the outer wall of described peripheral air passage is provided with the external diameter air admission hole (125) that multiple and peripheral inlet channel is communicated with, the axis of described external diameter air admission hole (125) and the axis of described internal diameter air admission hole (126) all not with the axes intersect of described central air passage (11).
2. the synthesis gas nozzle of discrete injection according to claim 1, it is characterized in that: the separating part (127) being provided with ring-type in described peripheral air passage, peripheral air channel partition is become the first air duct (121) and the second air duct (122) by described separating part (127), described internal diameter air admission hole (126) is communicated with described first air duct (121), and described external diameter air admission hole is communicated with described second air duct (122).
3. the synthesis gas nozzle of discrete injection according to claim 2, is characterized in that: be provided with fuel air pipe (123) in described first air duct (121) and the second air duct (122).
4. the synthesis gas nozzle of discrete injection according to claim 3, is characterized in that: be provided with the gripper shoe (124) for supporting fuel air pipe (123) in described first air duct (121) and the second air duct (122).
5. the synthesis gas nozzle of discrete injection according to claim 4, is characterized in that: the cross sectional shape of described internal diameter air admission hole (126) and described external diameter air admission hole (125) is rectangle, circle or oval.
6. the synthesis gas nozzle of discrete injection according to claim 1, is characterized in that: cross sectional shape is the central angle of the described fuel air pipe (123) of fan annular is 5 °-45 °.
7. the synthesis gas nozzle of discrete injection according to claim 1, is characterized in that: an end face of described central air passage (11) is provided with multiple end wall Cooling Holes (111).
8. the synthesis gas nozzle of discrete injection according to claim 7, is characterized in that: described end wall Cooling Holes (111) is uniformly distributed.
9. the synthesis gas nozzle of discrete injection according to claim 8, is characterized in that: described end wall Cooling Holes (111) is straight hole or inclined hole.
10. a gas turbine, is characterized in that: the synthesis gas nozzle including discrete injection as claimed in any one of claims 1-9 wherein.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520398650.6U CN204880216U (en) | 2015-06-10 | 2015-06-10 | Discrete synthetic gas nozzle and gas turbine who sprays |
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| CN201520398650.6U CN204880216U (en) | 2015-06-10 | 2015-06-10 | Discrete synthetic gas nozzle and gas turbine who sprays |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048514A (en) * | 2021-04-20 | 2021-06-29 | 中国联合重型燃气轮机技术有限公司 | Burner hood |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048514A (en) * | 2021-04-20 | 2021-06-29 | 中国联合重型燃气轮机技术有限公司 | Burner hood |
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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: Discrete synthetic gas nozzle and gas turbine who sprays Effective date of registration: 20161104 Granted publication date: 20151216 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 | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20191211 Granted publication date: 20151216 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191223 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. |