CN102607018A - Graded air-feed dual-swirled pulverized coal industrial furnace combustor - Google Patents
Graded air-feed dual-swirled pulverized coal industrial furnace combustor Download PDFInfo
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- CN102607018A CN102607018A CN201210052904XA CN201210052904A CN102607018A CN 102607018 A CN102607018 A CN 102607018A CN 201210052904X A CN201210052904X A CN 201210052904XA CN 201210052904 A CN201210052904 A CN 201210052904A CN 102607018 A CN102607018 A CN 102607018A
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Abstract
The invention discloses a graded air-feed dual-swirled pulverized coal industrial furnace combustor, solving the problem of lower combustion efficiency of the conventional coal industrial furnace. The graded air-feed dual-swirled pulverized coal industrial furnace combustor comprises two parts, namely a secondary air box and a graded air box which are partitioned by an annular baffle plate; a pre-combustion chamber is arranged in the region which is enclosed by the secondary air box and the graded air box; the front section of the pre-combustion chamber is cylindrical; the middle section of the pre-combustion chamber is of a divergent conical cylinder shape; the rear section of the pre-combustion chamber is a cylinder; the front section of the pre-combustion chamber is enclosed in the secondary air box, and communicated with the secondary air box through a secondary air swirler; the middle section of the pre-combustion chamber and the rear section of the pre-combustion chamber are enclosed in the graded air box, and separated from the graded air box through an annular water cooling jacket; a graded air swirler is arranged in the outlet of the pre-combustion chamber; a primary air pipe is inserted into the pre-combustion chamber after penetrating through the secondary air box; a reflective ignition gun is inserted into the pre-combustion chamber through the centre of the primary air pipe; and the ignition position of the reflective ignition gun is arranged in the centre of the pre-combustion chamber. According to the graded air-feed dual-swirled pulverized coal industrial furnace combustor, disclosed by the invention, pulverized coal and air can be better ensured to be mixed uniformly, so that a better heat-exchange effect is reached.
Description
Technical field
The present invention relates to a kind of burner, especially relate to a kind of air stage feeding bispin stream industrial coal powder boiler burner.
Background technology
China now the operation coal-burned industrial boiler above 400,000; The raw coal total amount that annual coal-fired industry consumes is near 500,000,000 tons; But problems such as that ubiquity is backward in technique, less economical, highly energy-consuming; Its average operating efficiency is merely 68% according to statistics, and the average operating efficiency of low capacity boiler has only about 55% especially.Traditional coal-burned industrial boiler has adopted the mode of this grate firing of chain furnace to organize block burning of coal owing to most, and because the defective of chain furnace self type of furnace characteristic and combustion system has determined that its efficiency of combustion is difficult to further improve again.
Adopt the burning of coal of organizing of coal dust suspension combustion mode, then can make the utilization ratio of coal reach a higher level.Adopt the suspension combustion mode to organize the station boiler that furnace cavity is bigger that is mostly of coal dust firing at present; But because the furnace cavity of Industrial Boiler is less; Highly organized aerodynamic field is with the burning that guarantees coal dust difficulty comparatively, thereby rarely has application in the low capacity Industrial Boiler at Industrial Boiler in especially.Researching and developing a kind of new coal powder combustion of industrial boiler device that can better tissues efficient stable burning, while in stove can prevent to take place in the stove slagging scorification again, then is the key that solves this technical barrier.
Summary of the invention
To above problem, the object of the present invention is to provide a kind of air stage feeding bispin stream industrial coal powder boiler burner that is applicable to Industrial Boiler.
Technical scheme of the present invention is: it is secondary air box and classification bellows two parts that air compartment of the present invention is cut off by ring baffle, is provided with a precombustion chamber in the zone that is surrounded by secondary air box and classification bellows; Said precombustion chamber leading portion is cylindric, and the stage casing is a flaring awl tubular, and back segment is a cylinder; Said precombustion chamber leading portion is surrounded in the secondary air box, and is communicated with secondary air box through the secondary wind cyclone; Said precombustion chamber stage casing and back segment are surrounded in the classification bellows, and are separated by by an annular water collar and classification bellows; Be provided with classification wind cyclone in the precombustion chamber exit; An airduct runs through secondary air box and inserts in the precombustion chamber, and a reflective burning torch is inserted in the precombustion chamber by an airduct center, and this reflective burning torch ignition location is arranged at the precombustion chamber center.
Said secondary wind cyclone is the tangential cyclone, and its structure mainly comprises secondary wind tangential swirl blade and secondary wind eddy flow wall; Said secondary wind eddy flow wall is a planar annular, has aperture on the ring side in it, is used for the flexible connection with secondary wind tangential swirl blade; Ring side in said secondary wind tangential swirl blade one end and secondary wind eddy flow wall are connected in, this moment, secondary wind tangential swirl blade can not move in the horizontal plane direction in the swing of perpendicular direction.
The tangential swirl blade of said secondary wind cyclone is connected by the eddy flow angle control loop of an annular, and eddy flow angle control loop all adopts active wring point to be connected with the tie point of each swirl vane; Said eddy flow angle control loop is connected through active wring point with an eddy flow angle control lever, and eddy flow angle control lever links to each other with adjusting rod through active wring point, and said adjusting rod afterbody is processed into spline-simulating; One cyclone adjustment disk is set outside the burner secondary air box, and the connecting rod of this adjustment disk stretches in the secondary air box, and the connecting rod afterbody connects a gear, the tooth bar engagement of said gear and said adjusting rod afterbody; Engagement is connected said cyclone adjustment disk with adjusting rod afterbody tooth bar through gear with said adjusting rod.
The adjustable inlet air angle of said secondary wind tangential swirl blade is 30 ° ~ 50 °.
Said classification wind cyclone is the tangential cyclone; Its structure mainly comprises classification wind tangential swirl vane and classification wind eddy flow wall; Said classification wind eddy flow wall is a planar annular, and said classification wind tangential swirl vane and classification wind eddy flow wall adopt and be welded to connect.
The air inlet angle of said classification wind tangential swirl blade is a set angle.
Said water collar is between precombustion chamber and classification bellows, and this water collar downside is provided with a cooling water inlet pipe road, upside is provided with a cooling water outlet pipe road; Said cooling water inlet pipe road is passed by secondary air box, is connected to the water tank of steam generator system; Said cooling water outlet pipe road is passed by the classification bellows, is connected to the economizer water inlet of steam generator system.
Said secondary air box downside connects secondary air channel.
Said classification bellows downside connects the classification airduct.
Said reflective burning torch is provided with a reflection alms bowl in the first side of rifle, and said reflection alms bowl opening is towards an airduct, and reflection alms bowl and a wind tube outlet keep a setpoint distance during installation.
The beneficial effect that the present invention has is:
1. air gets into the combustion zone via secondary wind cyclone and classification wind cyclone, and the swirling eddy of generation has been strengthened the flow perturbation in flow field, and what can better guarantee coal dust and air evenly mixes and reach more excellent heat exchange effect.
2. the present invention adopts the air stage feeding mode of secondary wind and classification wind, has played inhibition NO
XThe effect that generates.
3. the swirl vane adjustable angle of secondary wind cyclone of the present invention has realized the continuous adjusting of secondary wind swirl strength, has strengthened the coal adaptability of this industrial coal powder boiler burner.
4. the present invention is equipped with water collar in pre-burning locular wall outer periphery, and burner operation is to cool off the precombustion chamber wall through cooling water, can effectively prevent burner generation slagging scorification.
5. the present invention has designed a kind of new type reflection formula burning torch; Owing to this igniter igniting side is provided with a reflection alms bowl, when a wind was sprayed by primary air nozzle, pulverized coal particle clashed into the segment distance that will rebound afterwards because himself inertia is to reflect alms bowl; Thereby can make swirl secondary air take place fully to mix with pulverized coal particle earlier by the ejection of secondary wind tangential swirl device; Ignite with the precombustion chamber centre afterwards, can effectively improve coal dust the igniting initial stage burnout rate, coal dust is burnt more fully.
Description of drawings
Fig. 1 is a structural principle sketch map of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to view.
Fig. 3 is the structural representation of secondary wind cyclone of the present invention.
Fig. 4 is the structural principle sketch map of secondary wind cyclone governor motion of the present invention.
Fig. 5 is the engagement enlarged diagram of C part among Fig. 3.
Fig. 6 is the structural representation of classification wind cyclone.
Among the figure: 1, airduct, 2, secondary air box, 3, the secondary wind cyclone, 4, water collar, 5, precombustion chamber; 6, reflective burning torch, 7, the reflection alms bowl, 8, cooling water inlet pipe, 9, cooling water outlet pipe, 10, classification wind cyclone; 11, secondary air channel, 12, the classification bellows, 13, the classification airduct, 14, ring baffle, 15, adjusting rod; 16, eddy flow angle control lever, 17, active wring point, 18, secondary wind tangential swirl blade, 19, eddy flow angle control loop, 20, interior air channel; 21, secondary wind eddy flow wall, 22, the cyclone adjustment disk, 23, gear, 24, classification wind tangential swirl blade, 25, classification wind eddy flow wall.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Like Fig. 1, shown in Figure 2, it is secondary air box 2 and classification bellows 12 two parts that ring baffle of air compartment of the present invention 14 cuts off, and secondary air box 2 downsides connect secondary air channel 11, and classification bellows 12 downsides connect classification airduct 13.Be provided with precombustion chamber 5 in the zone that is surrounded by secondary air box 2 and classification bellows 12, precombustion chamber 5 leading portions are cylindric, and the stage casing is a flaring awl tubular; Back segment is cylindric; Wherein, precombustion chamber 5 leading portions are surrounded in the secondary air box 2, and are communicated with secondary air box 2 through secondary wind cyclone 3; Precombustion chamber 5 stage casings and back segment are surrounded in the classification bellows 12, and are separated with classification bellows 12 by an annular water collar 4.The downside of water collar 4 is provided with cooling water inlet pipe road 8, and cooling water inlet pipe road 8 is passed by secondary air box 2, is connected to the water tank of steam generator system; The upside of water collar 4 is provided with cooling water outlet pipe road 9, and cooling water outlet pipe road 9 is passed by classification bellows 12, is connected to the economizer water inlet of steam generator system.Also be provided with classification wind cyclone 10 in precombustion chamber 5 exits.
An airduct 1 runs through secondary air box 2 and inserts in the precombustion chamber 5, and reflective burning torch 6 is inserted into airduct 1 center and extends in the precombustion chamber 5, and reflective burning torch 6 ignition locations are arranged at precombustion chamber 5 centers.Reflective burning torch 6 is provided with a reflection alms bowl 7 in the first side of rifle, and the opening of reflection alms bowl 7 is towards an airduct 1, and the outlet of a reflection alms bowl 7 and an airduct 1 keeps a specific range during installation.
Like Fig. 3, Fig. 4, shown in Figure 5, secondary wind cyclone 3 is the tangential cyclone, and its structure mainly comprises secondary wind tangential swirl blade 18 and secondary wind eddy flow wall 21.Secondary wind eddy flow wall 21 is a planar annular, has aperture on the ring side in it, is used for the flexible connection with secondary wind tangential swirl blade 18; Ring side in secondary wind tangential swirl blade 18 1 ends and secondary wind eddy flow wall 21 are connected in, secondary wind tangential swirl blade 18 can rotate in perpendicular around the interior ring side tie point of swirl vane 18 with secondary wind eddy flow wall 21 at this moment.
The tangential swirl blade 18 of secondary wind cyclone 3 also is connected with eddy flow angle control loop 19, and eddy flow angle control loop 19 all adopts active wring point 17 to be connected with the tie point of each swirl vane 18.Eddy flow angle control loop 19 is connected through active wring point 17 with eddy flow angle control lever 16, and eddy flow angle control lever 16 links to each other with adjusting rod 15 through active wring point 17, and adjusting rod 15 afterbodys are processed into spline-simulating.Be outside equipped with cyclone adjustment disk 22 in burner secondary air box 2; The connecting rod of this adjustment disk stretches in the secondary air box 2; The connecting rod afterbody connects a gear 23; Gear 23 meshes with the tooth bar of adjusting rod 15 afterbodys; Be cyclone adjustment disk 22 and engagement is connected adjusting rod 15 with adjusting rod 15 afterbody tooth bars through gear 23, can realize the inlet air angle of secondary wind tangential swirl blade 18 is regulated that the adjustable inlet air angle of secondary wind tangential swirl blade 18 is 30 °～50 ° through rotation adjusting dish 22.
As shown in Figure 6, the internal structure of classification wind cyclone 10 and secondary wind cyclone basically identical, only different on the connected mode of swirl vane.Classification wind cyclone 10 is the tangential cyclone; Mainly comprise classification wind tangential swirl blade 24 and classification wind eddy flow wall 25; Classification wind eddy flow wall 25 is a planar annular, adopts between classification wind tangential swirl vane 24 and the classification wind eddy flow wall 25 to be welded to connect.The air inlet angle of classification wind tangential swirl blade 24 is a certain special angle.
Operation principle of the present invention is following: during work, at first open the pressure fan in the industrial boiler system, air is blasted in secondary air box 2 and the classification bellows 12.Air in secondary air box 2 and the classification bellows 12 tangential swirl blade in secondary wind cyclone 3 and classification wind cyclone 10 respectively gets in the precombustion chamber 5, has formed rotating jet.The two strands of rotating jets in front and back that in precombustion chamber, got into by secondary wind cyclone 3 and classification wind cyclone 10 have respectively effectively been strengthened the disturbance of aerodynamic field; And form a recirculating zone in the jet-core region; Can entrainment high-temperature flue gas; These all are of value to the heat exchange effect of strengthening between flue gas and the pulverized coal particle, help lighting and burning of coal dust.Meanwhile, the cyclone classification wind that is got into by classification wind cyclone 10 can also play the effect of the required oxygen of aftercombustion, has reached the purpose of air stage feeding, helps to suppress NO in the process of coal combustion
XGeneration.
After swirl secondary air and classification wind entering precombustion chamber 5; Feed oil fuel or the gaseous fuel that is used to ignite by reflective burning torch 6 earlier, and light the fuel that is used to ignite by the fire rod that reflective burning torch 6 carries, preheating was opened primary air fan after 5～10 seconds; Carrying coal dust by air is got in the precombustion chamber 5 by an airduct 1; Pulverized coal particle can bump with the reflection alms bowl 7 on the reflective burning torch 6 in airduct 1 exit, and the middle section position of precombustion chamber 5 is got back in bounce-back afterwards, and this moment, the swirl secondary air of pulverized coal particle and incoming flow met; Because swirl secondary air has stronger perturbation, thereby can guarantee fully mixing of coal dust and swirl secondary air.The wind coal mixed flow of full and uniform mixing continues advances, will run into reflective burning torch 6 and light the torch that ignites and produce with fuel, makes that fugitive constituent is separated out, burnt in the pulverized coal particle, and then pulverized coal particle is burnt.The high temperature torch that coal dust is lighted generation mixes with the cyclone classification wind that is penetrated by classification wind cyclone 10 in the precombustion chamber outlet; Replenished the required oxygen part of coal dust firing; And strengthened air agitation by cyclone classification wind, made that still unburned pulverized coal particle enough can be lighted.After about 10 seconds preheating, reflective igniting air gun 6 stops igniting, the pulverized coal particle that gets into after being ignited by the coal dust torch that has burnt, thereby the ignition process of realization burner.
In the overall process of burner igniting and steady combustion; Cooling water in the water collar 4 remains mobile; Promptly will pass through in the water tank of clear water by steam generator system of boiler water processing and extract out, enter into water collar 4 by cooling water inlet pipe 8, owing to sending constantly into of clear water makes the water in the water collar discharged naturally by cooling water outlet pipe 9 by water pump; Cooling water is incorporated into after cooling water outlet pipe 9 is discharged the economizer of steam generator system and goes, so that resource is fully utilized.
In order to strengthen the coal adaptability of burner of the present invention; Secondary wind cyclone 3 is designed to blade air inlet angle adjustable structure; Its concrete implementation is following: when rotating cyclone adjustment disk 22, the gear 23 that the connecting rod of this cyclone adjustment disk drives afterbody rotates, because the engagement of the rack segments of gear 23 and adjusting rod 15 afterbodys; Thereby when gear 23 rotates, adjusting rod 15 whole can moving to the left or to the right.When adjusting rod 15 is subjected to displacement, will be subjected to displacement in the eddy flow angle control lever 16 that active wring point 17 is connected with adjusting rod 15, and then drive rotates in the eddy flow angle control loop 19 that active wring point 17 is connected with this eddy flow angle control lever 16 thereupon.When 19 rotations of eddy flow angle control loop, tangential swirl blade 18 also will be swung thereupon, thereby realize the adjusting of secondary wind inlet air angle.Said secondary wind tangential swirl blade 18 inlet air angle of regulation range are 30 °～50 °, and this angular range can be through the concrete condition in the practical application example, control through the processing length to the rack segments of adjusting rod 15 afterbodys.
Claims (1)
1. air stage feeding bispin stream industrial coal powder boiler burner, it is characterized in that: it is secondary air box and classification bellows two parts that air compartment is cut off by a ring baffle, is provided with a precombustion chamber in the zone that is surrounded by secondary air box and classification bellows; Said precombustion chamber leading portion is cylindric, and the stage casing is a flaring awl tubular, and back segment is a cylinder; Said precombustion chamber leading portion is surrounded in the secondary air box, and is communicated with secondary air box through the secondary wind cyclone; Said precombustion chamber stage casing and back segment are surrounded in the classification bellows, and are separated by by an annular water collar and classification bellows; Be provided with classification wind cyclone in the precombustion chamber exit; An airduct runs through secondary air box and inserts in the precombustion chamber, and reflective burning torch is inserted in the precombustion chamber by an airduct center, and this reflective burning torch ignition location is arranged at the precombustion chamber center;
Said secondary wind cyclone is the tangential cyclone, and its structure mainly comprises secondary wind tangential swirl blade and secondary wind eddy flow wall; Said secondary wind eddy flow wall is a planar annular, has aperture on the ring side in it, is used for the flexible connection with secondary wind tangential swirl blade; Ring side in said secondary wind tangential swirl blade one end and secondary wind eddy flow wall are connected in, this moment, secondary wind tangential swirl blade can not move in the horizontal plane direction in the swing of perpendicular direction;
The tangential swirl blade of said secondary wind cyclone is connected by the eddy flow angle control loop of an annular, and eddy flow angle control loop all adopts active wring point to be connected with the tie point of each swirl vane; Said eddy flow angle control loop is connected through active wring point with an eddy flow angle control lever, and eddy flow angle control lever links to each other with adjusting rod through active wring point, and said adjusting rod afterbody is processed into spline-simulating; One cyclone adjustment disk is set outside the burner secondary air box, and the connecting rod of this cyclone adjustment disk stretches in the secondary air box, and the connecting rod afterbody connects a gear, the tooth bar engagement of said gear and said adjusting rod afterbody; Engagement is connected said cyclone adjustment disk with adjusting rod afterbody tooth bar through gear with said adjusting rod;
The adjustable inlet air angle of said secondary wind tangential swirl blade is 30 °～50 °;
Said classification wind cyclone is the tangential cyclone; Its structure mainly comprises classification wind tangential swirl vane and classification wind eddy flow wall; Said classification wind eddy flow wall is a planar annular, and said classification wind tangential swirl vane and classification wind eddy flow wall adopt and be welded to connect;
The air inlet angle of said classification wind tangential swirl blade is a set angle;
Said water collar is between precombustion chamber and classification bellows, and this water collar downside is provided with a cooling water inlet pipe road, upside is provided with a cooling water outlet pipe road; Said cooling water inlet pipe road is passed by secondary air box, is connected to the water tank of steam generator system; Said cooling water outlet pipe road is passed by the classification bellows, is connected to the economizer water inlet of steam generator system;
Said secondary air box downside connects secondary air channel;
Said classification bellows downside connects the classification airduct;
Said reflective burning torch is provided with a reflection alms bowl in the first side of rifle, and said reflection alms bowl opening is towards an airduct, and reflection alms bowl and a wind tube outlet keep a setpoint distance during installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210052904.XA CN102607018B (en) | 2012-03-02 | 2012-03-02 | Graded air-feed dual-swirled pulverized coal industrial furnace combustor |
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|---|---|---|---|
| CN201210052904.XA CN102607018B (en) | 2012-03-02 | 2012-03-02 | Graded air-feed dual-swirled pulverized coal industrial furnace combustor |
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| CN102607018A true CN102607018A (en) | 2012-07-25 |
| CN102607018B CN102607018B (en) | 2014-04-16 |
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| CN103123113A (en) * | 2013-01-24 | 2013-05-29 | 孙公钢 | Double-rotational-flow industrial boiler pulverized coal burner with back-blowing device |
| CN103471108A (en) * | 2013-07-22 | 2013-12-25 | 北京航天动力研究所 | Nitrous oxide (N2O) burner |
| CN106196042A (en) * | 2016-08-29 | 2016-12-07 | 煤科院节能技术有限公司 | A kind of strong swirl jet burner |
| CN106642084A (en) * | 2016-12-08 | 2017-05-10 | 哈尔滨工业大学 | Dual-register strong vortex melting combustor |
| CN107062212A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel-staged combustion device and its system |
| WO2018036566A1 (en) * | 2016-08-25 | 2018-03-01 | Zheng Shi | System and method for burning pulverized coal |
| CN107842848A (en) * | 2017-12-08 | 2018-03-27 | 煤科院节能技术有限公司 | A kind of Industrial Boiler precombustion chamber |
| CN108194918A (en) * | 2018-03-30 | 2018-06-22 | 烟台龙源电力技术股份有限公司 | The coal dust pretreatment unit and boiler of boiler |
| CN108525869A (en) * | 2018-06-04 | 2018-09-14 | 晋江美创环保设备有限公司 | A kind of cyclone of adjustable spinning disk angle and desulfurizing tower using the cyclone |
| CN114887786A (en) * | 2022-05-11 | 2022-08-12 | 煤科院节能技术有限公司 | Nozzle capable of adjusting fluid flow velocity |
| CN115949970A (en) * | 2023-01-05 | 2023-04-11 | 中国航空发动机研究院 | Swirler vane and swirler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123113A (en) * | 2013-01-24 | 2013-05-29 | 孙公钢 | Double-rotational-flow industrial boiler pulverized coal burner with back-blowing device |
| CN103471108A (en) * | 2013-07-22 | 2013-12-25 | 北京航天动力研究所 | Nitrous oxide (N2O) burner |
| CN103471108B (en) * | 2013-07-22 | 2016-08-31 | 北京航天动力研究所 | Laughing gas burner |
| WO2018036566A1 (en) * | 2016-08-25 | 2018-03-01 | Zheng Shi | System and method for burning pulverized coal |
| CN106196042A (en) * | 2016-08-29 | 2016-12-07 | 煤科院节能技术有限公司 | A kind of strong swirl jet burner |
| CN106642084B (en) * | 2016-12-08 | 2019-07-26 | 哈尔滨工业大学 | It is a kind of double that wind is adjusted to be vortexed by force melting burner |
| CN106642084A (en) * | 2016-12-08 | 2017-05-10 | 哈尔滨工业大学 | Dual-register strong vortex melting combustor |
| CN107062212A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel-staged combustion device and its system |
| CN107062212B (en) * | 2017-05-22 | 2023-11-07 | 北京醇能科技有限公司 | Low boiling point fuel staged combustion device and system thereof |
| CN107842848A (en) * | 2017-12-08 | 2018-03-27 | 煤科院节能技术有限公司 | A kind of Industrial Boiler precombustion chamber |
| CN108194918A (en) * | 2018-03-30 | 2018-06-22 | 烟台龙源电力技术股份有限公司 | The coal dust pretreatment unit and boiler of boiler |
| CN108194918B (en) * | 2018-03-30 | 2023-12-22 | 烟台龙源电力技术股份有限公司 | Pulverized coal pretreatment device of boiler and boiler |
| CN108525869A (en) * | 2018-06-04 | 2018-09-14 | 晋江美创环保设备有限公司 | A kind of cyclone of adjustable spinning disk angle and desulfurizing tower using the cyclone |
| CN114887786A (en) * | 2022-05-11 | 2022-08-12 | 煤科院节能技术有限公司 | Nozzle capable of adjusting fluid flow velocity |
| CN114887786B (en) * | 2022-05-11 | 2023-08-29 | 北京天地融创科技股份有限公司 | Nozzle capable of adjusting fluid flow velocity |
| CN115949970A (en) * | 2023-01-05 | 2023-04-11 | 中国航空发动机研究院 | Swirler vane and swirler |
| CN115949970B (en) * | 2023-01-05 | 2023-08-22 | 中国航空发动机研究院 | Cyclone blade and cyclone |
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