CN214332692U - Swirler and combustion device - Google Patents
Swirler and combustion device Download PDFInfo
- Publication number
- CN214332692U CN214332692U CN202022571261.2U CN202022571261U CN214332692U CN 214332692 U CN214332692 U CN 214332692U CN 202022571261 U CN202022571261 U CN 202022571261U CN 214332692 U CN214332692 U CN 214332692U
- Authority
- CN
- China
- Prior art keywords
- ring wall
- outer ring
- combustion
- blades
- bluff body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a swirler and burner, the swirler includes the whirl blade structure, this whirl blade structure includes that a plurality of whirl blades reach the bluff body that the concentric circle array was laid from interior to exterior, inner circle wall and outer lane wall, a plurality of whirl blades are fixed on this bluff body and around this bluff body circumference align to grid, the free end of a plurality of whirl blades runs through inner circle wall and outer lane wall in proper order, be connected with the connecting portion of fretwork between outer lane wall and the inner circle wall, the bluff body is circular lid, the terminal surface center of circular lid forms the conical point portion to the outer arch of circular lid along the axial, lay first through-hole on the conical point portion of bluff body, the second through-hole is laid to the part of conical point portion to the lid terminal surface, the width of each whirl blade reduces gradually from interior to exterior along radial. The combustion device comprises a combustion cylinder, a plurality of fuel air inlet spray pipes and a swirler. They have the following advantages: ensure stable and sufficient combustion and reduce the emission of pollutants.
Description
Technical Field
The utility model relates to a swirler and burner.
Background
Natural gas is called clean energy due to its high efficiency of combustion and the characteristic of low content of pollutants in combustion products, and with the development of society, human beings have higher and higher requirements for living environment, and natural gas has been widely used as a main energy source.
A combustion device is a device that converts chemical energy of a fuel into thermal energy. The basic use of the combustion device is to reasonably organize the combustion process of the fuel in the heat exchange device so as to ensure that the work of the combustion device meets the requirements of the process, the technology, the economy and the environmental protection. The combustion method of the fuel and the reasonable structure of the combustion device have direct and important influence on the thermal process. In the case of combustion devices, whether gas turbine combustors or boiler combustors are used in the industrial field, or main and afterburners of aircraft engines are used in the aviation field, the combustion device not only maintains high combustion efficiency of the combustors, but also ensures stable combustion of the fuel after ignition, avoids problems such as blow-out and backfire, and controls the emission of pollutants such as nitrogen oxides. Swirl is one of the most effective modes for stabilizing flame, and the swirler is the source for generating swirl, air passes through the swirler to generate a backflow zone, fuel is fully mixed in the backflow zone, stable and efficient combustion is achieved, and pollutant generation can be reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a swirler and burner, it has overcome in the background art burner in the problem that combustion efficiency is not high, the burning is unstable and pollutant discharge is higher.
The utility model provides a technical scheme that its technical problem adopted is:
a swirler comprises a swirl vane structure, the swirl vane structure comprises a plurality of swirl vanes, a bluff body, an inner ring wall and an outer ring wall, the bluff body, the inner ring wall and the outer ring wall are arranged in a concentric circular array from inside to outside, the fixed ends of the plurality of swirl vanes are fixed on the bluff body and are uniformly arranged around the circumference of the bluff body, the plurality of swirl vanes and a circumferential tangent line have the same inclined included angle, the free ends of the plurality of swirl vanes sequentially penetrate through the inner ring wall and the outer ring wall and enable the plurality of swirl vanes to at least partially extend out of the outer ring wall, a hollowed connecting part for air flow to pass through is connected between the outer ring wall and the inner ring wall, the bluff body is a circular cover body, the center of the end surface of the circular cover body protrudes towards the outside of the circular cover body along the axial direction to form a cone tip part, a plurality of first through holes for air flow to pass through are arranged on the cone tip part of the bluff body, a plurality of second through holes for air flow to pass through are arranged on the part of the end surface of the cover body around the cone tip part, the width of each swirl vane is gradually reduced from inside to outside along the radial direction.
In one embodiment: the cyclone blade structure also comprises annular bodies coaxially arranged at the periphery of the cyclone blade structure at intervals, the free tail ends of the plurality of cyclone blades are positioned between the outer ring wall and the annular bodies, and a plurality of ventilation structures for air flow to pass through are uniformly arranged on the annular bodies at intervals along the circumferential direction.
In one embodiment: and a plurality of third through holes for air flow to pass through are distributed on the rotational flow blades positioned between the outer ring wall and the inner ring wall.
In one embodiment: the connecting part is arranged between the outer ring wall and the inner ring wall and between the outer ring wall and the end face of the cone tip part with the same protruding direction, the connecting part is a plate ring which covers the space between the outer ring wall and the inner ring wall and extends along the space, the cross section of the plate ring is in the shape of an arc protruding towards the protruding direction of the cone tip part, and a plurality of fourth through holes which can enable the connecting part to be in a hollow structure are distributed on the plate ring.
In one embodiment: the ventilation structure is a hollow cylinder, the central axis of the hollow cylinder is parallel to the central axis of the annular body, one end of the hollow cylinder is an open end for air to flow in, the open end is fixed on the annular body, the other end of the hollow cylinder is a closed blind end, and a fifth through hole for air to pass through is formed in the end face of the blind end.
In one embodiment: the side surface of the hollow column body of the ventilation structure is provided with a sixth through hole for air flow to pass through, and at least one sixth through hole 212 faces to the radial centers of the plurality of ventilation structures.
In one embodiment: the size of the first through hole is smaller than that of the second through hole.
In one embodiment: the fourth through holes are distributed in an array.
In one embodiment: the inclined included angle between the swirl vanes and the circumferential tangent is 25-65 degrees, and the number of the swirl vanes is 12-30.
In one embodiment: the swirl blades at least with two centrosymmetric positions are fixedly provided with disturbance structures for disturbing airflow.
A combustion device comprises a combustion cylinder, a plurality of fuel air inlet spray pipes and a swirler, wherein the swirler is arranged on the upper side of the airflow of the combustion cylinder and is coaxially arranged with the combustion cylinder, and the fuel air inlet spray pipes are uniformly distributed between an outer ring wall and an annular body at intervals along the circumferential direction.
Compared with the background technology, the technical scheme has the following advantages:
1. swirler, through the setting of outer lane wall, inner circle wall and with the width of whirl blade along radially reducing the setting from inside to outside gradually, make radially form different swirl intensity region, it is stronger to be close to center department swirl intensity more, it is lower more to be close to peripheral swirl intensity, fundamentally has guaranteed the stability of burning, has reduced the concentration of oxygen, the burning is more even, does not have obvious local high-temperature area. Moreover, the entire combustion region is divided into a central combustion region for fuel-rich combustion, which can suppress the generation of nitrogen oxides, and a peripheral combustion region for fuel-lean combustion, which is a fuel-lean premixed gas, and has a low combustion temperature, which also has the effect of reducing the emission of nitrogen oxides.
2. The turbulence structure is arranged on the swirl vanes, so that the mixing of fuel and air is enhanced, the mixing is more uniform, and the combustion efficiency is improved.
3. The hollow connecting part connected between the outer ring wall and the inner ring wall can increase the resistance of the flowing air and increase the residence time of the air in a combustion area, so that the fuel and the air are fully mixed at the position, the combustion is more sufficient, the combustion efficiency is higher, and the emission of nitrogen oxides is reduced.
4. The setting of ring body can improve the gas in the stove and other gaseous degree of mixing and increase the torrent degree in the stove for the distribution of the temperature field in the stove and gas field is more even, and the distribution of the air current temperature in the stove and the distribution of gas make the interior gas burn out of stove, make the gas abundant, stable burning in limited combustion space.
5. Be equipped with first through-hole and second through-hole on the cone point portion of this bluff body and the terminal surface respectively, can enlarge gas and air area of contact, the burning is more even.
6. A combustion device is characterized in that a swirler is arranged on the upper side of airflow of a combustion cylinder, and a plurality of fuel inlet spray pipes are uniformly distributed between an outer ring wall and an annular body at intervals along the circumferential direction. The combustion device has the advantages that strong rotation disturbance is facilitated to be formed, an aerodynamic field which is more suitable for combustion is formed in the combustion cylinder, the disturbance of combustion airflow is enhanced, the combustion cylinder is fully combusted, the combustion state is more stable, the combustion intensity is increased due to the fact that the mixing degree of the gas and the air is enhanced, and the combustion torch in the combustion cylinder is shortened, so that the inner size of the combustion cylinder can be correspondingly reduced on the premise of the same combustion load, and meanwhile, the combustion efficiency and the thermal efficiency of the combustion device are further improved due to the smaller inner size of the combustion cylinder. The swirler is arranged in the combustion device, a negative pressure backflow area is formed in the center of the combustion cylinder, so that the timely backflow of high-temperature flue gas is ensured, and the combustion is more sufficient.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic perspective view of a cyclone;
FIG. 2 is a schematic perspective view of a second embodiment of the cyclone;
FIG. 3 depicts a front view of the combustion apparatus;
fig. 4 shows a side view of the combustion device.
Detailed Description
Referring to fig. 1 and 2, a cyclone 100 includes a cyclone blade structure 1, the cyclone blade structure 1 includes a plurality of cyclone blades 11, a bluff body 12, an inner ring wall 13 and an outer ring wall 14, the bluff body 12, the inner ring wall 13 and the outer ring wall 14 are arranged in a concentric circular array from inside to outside, fixed ends of the plurality of cyclone blades 11 are fixed on the bluff body 12 and are uniformly arranged around the circumference of the bluff body 12, the plurality of cyclone blades 11 and a circumferential tangent have the same inclined included angle, free ends of the plurality of cyclone blades 1 sequentially penetrate through the inner ring wall 13 and the outer ring wall 14 and at least part of the plurality of cyclone blades 11 extend out of the outer ring wall 14, the width of each cyclone blade 1 is gradually reduced from inside to outside along a radial direction, a hollow connecting portion 15 for an air flow to pass through is connected between the outer ring wall 14 and the inner ring wall 13, the bluff body 12 is a circular cover, the center of the end face of the circular cover body protrudes outward from the circular cover body along the axial direction to form a cone tip portion, a plurality of first through holes 121 for air flow to pass through are arranged on the cone tip portion of the blunt body 12, and a plurality of second through holes 122 for air flow to pass through are arranged on the portion, surrounding the cone tip portion, of the end face of the cover body. A plurality of third through holes 111 for air flow to pass through are distributed on the swirl vanes 11 positioned between the outer ring wall 14 and the inner ring wall 13. The outer ring wall 14 and the inner ring wall 13 are circular.
Specifically, the number of the first through holes 121 gradually increases from the cone top to the cone bottom, and the size of the first through holes 121 is smaller than that of the second through holes 122. The conical tip of the blunt body is conical, and the included angle between the conical surface and the axial direction is 45 degrees.
Specifically, the inclined included angle between the swirl vanes 11 and the circumferential tangent is 25-65 degrees, and the number of the swirl vanes 11 is 12-30. The fixed ends of the plurality of swirl vanes 11 are fixed on the circular side of the cover body of the blunt body 12.
Specifically, the connecting portion 15 is disposed between the outer ring wall 14 and the inner ring wall 13 and an end surface of the outer ring wall, the inner ring wall 13 and the end surface of the cone tip portion, the connecting portion 15 is a plate ring covering a space between the outer ring wall 14 and the inner ring wall 13 and extending along the space, a cross section of the plate ring is in an arc shape protruding toward the protruding direction of the cone tip portion, a plurality of fourth through holes 151 capable of making the connecting portion 15 be a hollow structure are disposed on the plate ring, and the fourth through holes 151 are distributed in an array on the plate ring.
The cyclone blade structure further comprises annular bodies 2 coaxially arranged at intervals on the peripheries of the cyclone blade structures, the free tail ends of the plurality of cyclone blades 11 are located between the outer ring wall 14 and the annular bodies 2, and a plurality of ventilation structures 21 for air flow to pass through are uniformly arranged on the annular bodies 2 at intervals along the circumferential direction. The ventilation structure 21 is a hollow cylinder, the central axis of the hollow cylinder is parallel to the central axis of the ring body 2, one end of the hollow cylinder is an open end for air to flow in, the open end is fixed on the ring body 2, the other end of the hollow cylinder is a closed blind end, and a fifth through hole 211 for air to pass through is formed in the end face of the blind end. Specifically, the hollow cylinder is a polygonal hollow cylinder, a sixth through hole 212 for allowing airflow to pass through is formed in a side surface of the hollow cylinder of the ventilation structure 21, the size of the sixth through hole 212 is larger than that of the fifth through hole 211, and at least one sixth through hole 212 faces to radial centers of the ventilation structures. The annular body 2 is circular and annular.
The turbulence structure 112 for disturbing the airflow is fixed on the swirl vane 11 with at least two centrosymmetric positions. In this embodiment, the perturbation structures 112 are respectively arranged on the 4 swirl vanes 11 in the 90-degree direction, and the perturbation structures 112 include two parallel filaments, one end of each of which is fixed on the swirl vane 11.
Referring to fig. 3 and 4, a combustion apparatus includes a combustion can 200, a plurality of fuel inlet nozzles 300, and the swirler 100 as described above, the swirler 100 is disposed on the upper side of the combustion can 200 in the air flow and is installed coaxially with the combustion can 200, and the plurality of fuel inlet nozzles 300 are uniformly circumferentially spaced between the outer ring wall 14 and the annular body 2. During combustion, the fuel gas is sprayed towards the lower part of the air flow through the spray holes on the fuel inlet nozzle 300, meanwhile, air is blown into the cyclone 100 through equipment such as a fan, and when the air passes through the cyclone 100, the air is spirally stirred and blown out under the action of the cyclone blades 11, so that the air and the fuel gas are fully mixed and combusted.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.
Claims (11)
1. A swirler, characterized by: the vortex flow blade structure comprises a vortex flow blade structure, the vortex flow blade structure comprises a plurality of vortex flow blades, a bluff body, an inner ring wall and an outer ring wall, the bluff body, the inner ring wall and the outer ring wall are arranged in a concentric circular array from inside to outside, the fixed ends of the plurality of vortex flow blades are fixed on the bluff body and are uniformly arranged around the circumference of the bluff body, the plurality of vortex flow blades and a circumferential tangent line have the same inclined included angle, the free ends of the plurality of vortex flow blades sequentially penetrate through the inner ring wall and the outer ring wall and enable the plurality of vortex flow blades to at least partially extend out of the outer ring wall, a hollowed connecting part for air flow to pass through is connected between the outer ring wall and the inner ring wall, the bluff body is a circular cover body, the center of the end face of the circular cover body protrudes outwards from the circular cover body along the axial direction to form a cone tip part, a plurality of first through holes for air flow to pass through are arranged on the cone tip part of the end face of the cover body, the width of each swirl vane is gradually reduced from inside to outside along the radial direction.
2. A cyclone according to claim 1, wherein: the cyclone blade structure also comprises annular bodies coaxially arranged at the periphery of the cyclone blade structure at intervals, the free tail ends of the plurality of cyclone blades are positioned between the outer ring wall and the annular bodies, and a plurality of ventilation structures for air flow to pass through are uniformly arranged on the annular bodies at intervals along the circumferential direction.
3. A cyclone according to claim 1, wherein: and a plurality of third through holes for air flow to pass through are distributed on the rotational flow blades positioned between the outer ring wall and the inner ring wall.
4. A cyclone according to claim 1, wherein: the connecting part is arranged at one end of the outer ring wall, the inner ring wall and the cone tip part, the protruding direction of the cone tip part is consistent, the connecting part is a plate ring which covers the space between the outer ring wall and the inner ring wall and extends along the space, the cross section of the plate ring is in the shape of an arc protruding towards the protruding direction of the cone tip part, and a plurality of fourth through holes which enable the connecting part to be in a hollow structure are distributed on the plate ring.
5. A cyclone according to claim 2, wherein: the ventilation structure is a hollow cylinder, the central axis of the hollow cylinder is parallel to the central axis of the annular body, one end of the hollow cylinder is an open end for air to flow in, the open end is fixed on the annular body, the other end of the hollow cylinder is a closed blind end, and a fifth through hole for air to pass through is formed in the end face of the blind end.
6. A cyclone according to claim 5, wherein: the side surface of the hollow cylinder of the ventilation structure is provided with a sixth through hole for air flow to pass through, and the sixth through hole is at least towards the radial centers of the ventilation structures.
7. A cyclone according to claim 1, wherein: the size of the first through hole is smaller than that of the second through hole.
8. A cyclone according to claim 4, wherein: the fourth through holes are distributed in an array.
9. A cyclone according to claim 1, wherein: the inclined included angle between the swirl vanes and the circumferential tangent is 25-65 degrees, and the number of the swirl vanes is 12-30.
10. A cyclone according to any of claims 1-9, wherein: the swirl blades at least with two centrosymmetric positions are fixedly provided with disturbance structures for disturbing airflow.
11. A combustion apparatus, characterized by: comprising a combustion bowl, a plurality of fuel inlet lances arranged on the upstream side of the combustion bowl in relation to the gas flow and coaxially mounted thereto, and a swirler as claimed in any one of claims 2 to 10, the plurality of fuel inlet lances being circumferentially evenly spaced between the outer ring wall and the annular body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022571261.2U CN214332692U (en) | 2020-11-09 | 2020-11-09 | Swirler and combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022571261.2U CN214332692U (en) | 2020-11-09 | 2020-11-09 | Swirler and combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214332692U true CN214332692U (en) | 2021-10-01 |
Family
ID=77894362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022571261.2U Active CN214332692U (en) | 2020-11-09 | 2020-11-09 | Swirler and combustion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214332692U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228871A (en) * | 2020-11-09 | 2021-01-15 | 华侨大学 | Swirler and combustion device |
-
2020
- 2020-11-09 CN CN202022571261.2U patent/CN214332692U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228871A (en) * | 2020-11-09 | 2021-01-15 | 华侨大学 | Swirler and combustion device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111520717A (en) | Hierarchical low-nitrogen gas burner based on rotational flow | |
| CN111457371A (en) | Low-nitrogen burner | |
| CN106907712B (en) | The gas nozzle of ultralow nitrogen suspension combustion flame | |
| CN110822430A (en) | Low-nitrogen combustor based on multistage swirler | |
| CN106524154B (en) | A kind of classification combustion gas low NO | |
| CN110822423A (en) | Multi-purpose burner with fins and different-diameter gas self-rotating premixing function | |
| CN214332692U (en) | Swirler and combustion device | |
| CN112361335A (en) | Combustor based on multizone burning | |
| CN109323258B (en) | Burner structure based on multiple types of nozzles | |
| CN212227021U (en) | Low-nitrogen combustor | |
| CN106247408B (en) | A kind of nozzle, nozzle array and burner for widening tempering nargin | |
| CN217816730U (en) | Full-premixing bluff body flame-stabilizing low-nitrogen combustor | |
| CN216346263U (en) | Novel marsh gas low-nitrogen burner | |
| RU2660592C1 (en) | Burner head of burner device | |
| CN112228871A (en) | Swirler and combustion device | |
| CN212673215U (en) | Low-nitrogen burner | |
| CN214581074U (en) | Combustor based on multi-zone combustion | |
| CN115143459A (en) | Injection premixing smoke internal circulation low-nitrogen combustor | |
| CN211424388U (en) | Low-nitrogen combustor based on multistage swirler | |
| CN212777340U (en) | Hierarchical low-nitrogen gas burner based on rotational flow | |
| CN115013973A (en) | Full premix water-cooling gas boiler | |
| CN114576628A (en) | Multistage mixing full-premixing low-nitrogen combustor | |
| CN113154428A (en) | Gas flame swing burner and direct-fired heating device for denitration system | |
| CN109611889B (en) | Gas fuel nozzle assembly | |
| CN111271708A (en) | Low-nitrogen combustor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |