CN111895409A - Gas flow vector control device - Google Patents
Gas flow vector control device Download PDFInfo
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- CN111895409A CN111895409A CN202010601175.3A CN202010601175A CN111895409A CN 111895409 A CN111895409 A CN 111895409A CN 202010601175 A CN202010601175 A CN 202010601175A CN 111895409 A CN111895409 A CN 111895409A
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- air outlet
- diffusion
- conical air
- baffle
- conical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The patent provides an easy operation, convenient to use can change the gaseous velocity of flow, the air flow vector controlling means of cross-sectional area. The air outlet device comprises a conical air outlet door which is connected with an outlet at the front end of an air outlet channel and is small in front and large in back, wherein the conical air outlet door comprises a plurality of diffusion blades which are arranged in the circumferential direction, the large end of each diffusion blade is connected with an air outlet channel port in a swinging mode in the radial direction of the conical air outlet door, and each diffusion blade is connected with a driving mechanism which drives the diffusion blade to swing; a baffle is fixed on the inner side or/and the outer side of one diffusion blade in two circumferentially adjacent diffusion blades and extends to the other diffusion blade in the circumferential direction; when the driving mechanism drives each diffusion blade to swing towards the direction close to the axis of the conical air outlet, the diameter of the small end of the conical air outlet is reduced; when the driving mechanism drives each diffusion blade to swing towards the direction far away from the axis of the conical air outlet, and the diameter of the small end of the conical air outlet is increased, gaps are formed in the circumferential direction of each diffusion blade, and the gaps are covered by the baffle plates in the circumferential direction.
Description
Technical Field
The patent refers to the field of 'gas-fired equipment'.
Background
In a gas burner, in order to change the flow rate and the flow velocity of combustion air (air), a common method is to arrange a common air door and various groups of control valves on a combustion air channel, so that the gas burner is low in adaptability and poor in universality.
Disclosure of Invention
The purpose of this patent is to provide a simple operation, convenient to use can change the gas flow velocity, the gas flow vector controlling means of ventilation sectional area.
In order to achieve the purpose, the gas flow vector control device comprises a conical gas outlet door which is connected with an outlet at the front end of a gas outlet channel and has a small front part and a large back part, wherein the conical gas outlet door comprises a plurality of diffusion blades which are arranged in the circumferential direction, the large end of each diffusion blade is connected with a port of the gas outlet channel in a swinging mode in the radial direction of the conical gas outlet door, and each diffusion blade is connected with a driving mechanism which drives the diffusion blade to swing around the swinging position in the radial direction of the conical gas outlet door; a baffle is fixed on the inner side or/and the outer side of one of the two circumferentially adjacent diffusion blades and extends to the other diffusion blade in the circumferential direction of the conical air outlet door; when the driving mechanism drives each diffusion blade to swing towards the direction close to the axis of the conical air outlet door, the diameter of the small end of the conical air outlet is reduced; when the driving mechanism drives each diffusion blade to swing towards the axis direction far away from the conical air outlet door, so that the diameter of the small end of the conical air outlet is increased, gaps are formed in the circumferential direction of each diffusion blade, and the gaps are covered by the baffle plates in the circumferential direction.
In the above-described gas flow vector control apparatus, the baffle is an inner baffle fixed to an inner side of one of the two circumferentially adjacent diffuser blades.
In the above-described gas flow vector control apparatus, the baffle is an outer baffle fixed to an outer side of one of the two circumferentially adjacent diffuser blades.
In the above-described gas flow vector control apparatus, the baffle plate includes an inner baffle plate fixed to an inner side of one of the two circumferentially adjacent diffuser blades and an outer baffle plate fixed to an outer side of one of the two circumferentially adjacent diffuser blades; the inner baffle and the outer baffle have an overlapping part in the generatrix direction of the conical air outlet door.
The driving device of the gas flow vector control device comprises a connecting rod, the connecting rod is hinged with the outer side of the diffusion blade, the other end of the connecting rod is hinged with a pull rod parallel to the axis of the conical air outlet door, the periphery of the air outlet channel is provided with a shell, and the pull rod penetrates through the shell.
The other ends of the pull rods penetrating through the shell of the gas flow vector control device are connected with the connecting plate, and the connecting plate is connected with the driving pull rod which drives the connecting plate to move along the direction parallel to the axis of the conical air outlet door.
The beneficial effect of this patent: the driving mechanism drives the diffusion blades to swing (expand and contract), the air outlet angle (the included angle between a generatrix of the conical air outlet and the axis) of the conical air outlet and the diameter (the ventilation sectional area) of the small end of the conical air outlet are forcibly changed, and the flow velocity, the flow rate and the direction of gas (such as combustion-supporting air) sprayed out of the conical air outlet are adjusted.
When the driving mechanism drives each diffusion blade to swing towards the direction close to the axis of the conical air outlet door, the diameter of the small end of the conical air outlet is gradually reduced; when the driving mechanism drives each diffusion blade to swing towards the axis direction far away from the conical air outlet door, the diameter of the small end of the conical air outlet is gradually increased.
Therefore, when the device is applied to the combustor, the air quantity, the air speed and the like of the conical air outlet door can be adjusted in real time aiming at different combustors and combustion spaces, the amount of gas (such as combustion-supporting air and the like) participating in combustion is changed, the adaptability is greatly enhanced, and the universality is wide.
When the diameter of the small end of the conical air outlet is not minimum, each diffusion blade has a gap in the circumferential direction, but because the baffle plate extends to the diffusion blade without the baffle plate fixed in the circumferential direction, the baffle plate covers the gap in the radial direction of the conical air outlet, and therefore, gas (such as combustion air and the like) passing through the conical air outlet does not leak from the gap in the radial direction.
Of course, the baffle may be an inner baffle located inside the diffuser blade, an outer baffle located outside the diffuser blade, or a combination of the inner and outer baffles. When the inner baffle and the outer baffle are combined, the inner baffle and the outer baffle are overlapped in the bus direction of the conical air outlet door, so that the possibility of leakage of gas (such as combustion-supporting air and the like) passing through the conical air outlet from a gap between two circumferentially adjacent diffusion blades is lower.
The pull rod is pulled, and the diffusion blade is driven to swing through the connecting rod, so that the angle of the diffusion blade is convenient to adjust. Of course, the other end of a plurality of pull rods all links to each other with the connecting plate, and the connecting plate links to each other with the initiative pull rod that drives it and remove along being on a parallel with toper valve axis direction, through pulling initiative pull rod, can drive a plurality of pull rods, connecting rod simultaneously and drive a plurality of diffusion blade and swing simultaneously, and it is more convenient to operate.
Drawings
FIG. 1 is a perspective view of a vector controlled gas low NOx burner using a gas flow vector control device;
FIG. 2 is another perspective view of the vector control gas low NOx burner;
FIG. 3 is a front view of a vector control gas low NOx burner;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic view of a gas flow vector control device (with tie rods, etc. removed and with gaps between diffuser vanes);
FIG. 6 is a right side view of FIG. 5;
FIG. 7 is a schematic view of a gas flow vector control device (with tie rods, etc. removed and no gaps between diffuser vanes);
FIG. 8 is a right side view of FIG. 7;
FIG. 9 is a schematic view of a diffuser vane, inner baffle, outer baffle, etc.;
fig. 10 is a right side view of fig. 9.
In the figure, a central air pipe 1, an outer air pipe 2, an air channel 3, a shell 4, an air outlet pipe 5, a front section air outlet pipe 51, a conical rear section air outlet pipe 52, a flue gas gap 53, a middle section air outlet pipe 54, a flue gas inlet 55 and a ribbed plate 56;
a central air tap 6; the air suction mixing pipe 8, the second blade 9 and the smoke suction gap 10;
the air outlet valve comprises a conical air outlet valve 100, a rotating shaft 101, a fixing lug 102, an outer baffle 103, an inner baffle 104, a diffusion blade 105, a pull rod 106, a connecting plate 107, an active pull rod 108 and a connecting rod 110.
Detailed Description
Referring to fig. 1, the vector control gas low-nitrogen burner using the gas flow vector control device comprises a central gas pipe 1, an outer gas pipe 2, and a housing 4 having an air passage (gas outlet passage) 3 therein, wherein an inlet of the air passage is communicated with an outlet of a fan (not shown).
The air outlet pipe 5 comprises a front section air outlet pipe 51, a middle section air outlet pipe 54 and a tapered rear section air outlet pipe 52 with a small front part and a large rear part, and the front section air outlet pipe 51 is an opening expanding section with a large front part and a small rear part; the front end of the cylindrical middle air outlet pipe 54 is butted with the flaring section, the front end of the rear air outlet pipe 52 has smaller diameter, and a flue gas gap 53 is formed between the front end of the middle air outlet pipe with larger diameter and the rear end of the middle air outlet pipe. The side wall of the front part of the middle section air outlet pipe 54 is provided with a plurality of flue gas inlets 55; when the combustion-supporting air is sprayed out through the air channel and the air outlet pipe, the flue gas at the periphery of the air outlet pipe is sucked into the air outlet pipe through the flue gas inlet 55 to be mixed with the combustion-supporting air and then participate in combustion. The rear end of the periphery of the middle air outlet pipe 54 is fixed on the shell 4 through four rib plates 56.
The rear section air outlet pipe 52 is a conical air outlet door 100 which is connected with the front end outlet of the air channel 3 and has a small front part and a large back part, the conical air outlet door comprises a plurality of diffusion blades 105 which are arranged in the circumferential direction, and the large end of each diffusion blade is connected with the air channel port in a swinging mode in the radial direction of the conical air outlet door through a rotating shaft 101.
The driving device comprises a connecting rod 110, a pull rod 106, connecting plates 107, an active pull rod 108 and the like, wherein the front end of the connecting rod 110 is hinged with a fixing lug 102 fixed at the front middle part of the outer side of the diffusion blade, the other end of the connecting rod is hinged with a pull rod 6 parallel to the axis of the conical vent door, the other end of each pull rod 6 penetrating through the shell 4 on the periphery of the air channel is respectively connected with the two connecting plates 107, and the connecting plates are connected with the active pull rod 108 driving the connecting plates to move along the direction parallel to the axis of the conical vent.
An inner baffle plate 104 and an outer baffle plate 103 are respectively fixed at the front part of the inner side and the rear part of the outer side of one of two circumferentially adjacent diffuser blades, and the inner baffle plate 104 and the outer baffle plate 103 extend towards the other diffuser blade in the circumferential direction of the conical air outlet door; the inner baffle 104 and the outer baffle 103 have an overlapping portion in the generatrix direction of the tapered outlet gate.
When the two driving pull rods 108 are synchronously pushed forward, the connecting plate 107, the pull rod 106 and the connecting rod 110 drive each diffusion blade 105 to swing towards the axial direction close to the conical air outlet, so that the diameter of the small end of the conical air outlet is gradually reduced to the minimum, each diffusion blade is contacted in the circumferential direction, and the flue gas gap 53 between the conical air outlet 100 and the middle section air outlet pipe 54 is the maximum. When the two driving pull rods 108 are pulled backwards synchronously, the connecting plate 107, the pull rod 106 and the connecting rod 110 drive each diffusion blade to swing towards the axis direction far away from the conical air outlet, so that the diameter of the small end of the conical air outlet is gradually increased to the maximum, and the gap 109 between two circumferentially adjacent diffusion blades is maximized.
However, since the inner baffle 104 and the outer baffle 103 extend in the circumferential direction toward the diffuser blades to which the baffles are not fixed, the baffles cover the gap 109 in the radial direction of the tapered outlet, and the inner baffle 104 and the outer baffle 103 have an overlapping portion in the generatrix direction of the tapered outlet, so that the combustion supporting air does not substantially leak from the gap 109 between the two circumferentially adjacent diffuser blades. When the gap 109 between two circumferentially adjacent diffusion blades reaches the maximum, the diameter of the front small end of the conical air outlet door 100 is the maximum, and the flue gas gap 53 between the conical air outlet door 100 and the middle section air outlet pipe 54 is the minimum. When the combustion-supporting air is sprayed out through the air channel and the air outlet pipe 5, the flue gas at the periphery of the air outlet pipe is sucked into the air outlet pipe through the flue gas gap and the flue gas inlet to be mixed with the combustion-supporting air and then participate in combustion.
The front end of the central air pipe 1 is provided with a central air tap 6. 8 outer air pipes 2 are positioned at the periphery of the air outlet pipe 5; the front end of the outer annular duct 2 is axially opposite to the rear end of a suction mixing duct 8 of larger diameter than the latter and is connected by second vanes 9 extending in the radial direction. The rear end of the outer gas pipe 2 is communicated with a gas source through an outer gas supply pipeline (belonging to the prior art and not described). The central gas pipe is communicated with a gas source through a central gas supply pipeline (belonging to the prior art and not described again). The outer ring gas supply pipeline and the central gas supply pipeline which are connected in parallel are both provided with regulating valves.
A smoke suction gap 10 is arranged between the front end of the outer annular air pipe and the rear end of the air suction mixing pipe; when the gas flows out through the outer annular gas pipe and enters the gas suction mixing pipe, the peripheral gas is sucked into the gas suction mixing pipe through the gas suction gap 10 to be mixed with the gas, and the gas flows out from the front part of the gas suction mixing pipe to be combusted.
The central air pipe 1, the central air tap 6, the air channel 3, the outer annular air pipe 2, the air suction mixing pipe 8, the second blade 9, the flue gas suction gap 10, the outer annular air supply pipeline, the central air supply pipeline and the like in the application belong to the prior art, and related contents can be referred to Chinese patent applications with application numbers of 2020100721034 and 2020101537669.
The diffusion blades 105 are driven by the active pull rod 108 and the like to swing (expand and contract), the air outlet angle (the included angle between the generatrix of the conical air outlet and the axis) of the conical air outlet 100 and the diameter (the ventilation sectional area) of the small end at the front part of the conical air outlet are forcibly changed, the flow speed and the flow rate of combustion-supporting air sprayed out from the conical air outlet are adjusted, the direction is matched with the flaring section 51 at the front end of the air outlet pipe 5, combustion-supporting air sprayed out of the air outlet pipe forms a powerful smoke suction roll in a combustion furnace chamber, low-temperature smoke around the entrainment furnace wall participates in combustion, one part of the low-temperature smoke is sucked into the air outlet pipe through the smoke gap 53 and then is mixed with the combustion-supporting air to participate in combustion, the other part of the low-temperature smoke is sucked into the air outlet pipe through the smoke inlet 55 and then is mixed with the combustion-supporting air to participate in combustion, the overall distribution of flame is changed, the combustion temperature is reduced, and NO is reduced.XWhile the flue gas is added to cool the flame outer flame temperature, which will reduce the generation of NO from oxygen and nitrogenXThereby reducing NOXThe temperature peak value of the flame is uniformly reduced.
The gas that gets into in the low-nitrogen gas combustor burns and gives out heat and heats equipment such as boiler, adopts vector control, and high-pressure fan is with combustion-supporting wind through going out the tuber pipe blowout, forms a powerful flue gas backward flow in the furnace of burning, and the entrainment oven is low temperature flue gas all around goes in the burning, changes flame overall distribution, reduces the temperature of burning, has reduced NOXWhile the flue gas is added to cool the flame outer flame temperature, which will reduce the generation of NO from oxygen and nitrogenXThereby reducing NOXSo that the nitrogen oxide in the discharged tail gas reaches 25mg/m3Hereinafter, the temperature peak of the flame is uniformly reduced.
Claims (6)
1. The gas flow vector control device comprises a conical gas outlet door which is connected with a front small outlet and a back large outlet at the front end of a gas outlet channel, and is characterized in that: the conical air outlet door comprises a plurality of diffusion blades which are arranged in the circumferential direction, the large end of each diffusion blade is connected with the port of the air outlet channel in a swinging mode in the radial direction of the conical air outlet door, and each diffusion blade is connected with a driving mechanism which drives the diffusion blade to swing around the swinging position in the radial direction of the conical air outlet door; a baffle is fixed on the inner side or/and the outer side of one of the two circumferentially adjacent diffusion blades and extends to the other diffusion blade in the circumferential direction of the conical air outlet door; when the driving mechanism drives each diffusion blade to swing towards the direction close to the axis of the conical air outlet door, the diameter of the small end of the conical air outlet is reduced; when the driving mechanism drives each diffusion blade to swing towards the axis direction far away from the conical air outlet door, so that the diameter of the small end of the conical air outlet is increased, gaps are formed in the circumferential direction of each diffusion blade, and the gaps are covered by the baffle plates in the circumferential direction.
2. The gas flow vector control device of claim 1, wherein: the baffle is an inner baffle fixed on the inner side of one diffusion blade in two circumferentially adjacent diffusion blades.
3. The gas flow vector control device of claim 1, wherein: the baffle is an outer baffle fixed on the outer side of one of two circumferentially adjacent diffusion blades.
4. The gas flow vector control device of claim 1, wherein: the baffle comprises an inner baffle fixed on the inner side of one of the two circumferentially adjacent diffusion blades and an outer baffle fixed on the outer side of one of the two circumferentially adjacent diffusion blades; the inner baffle and the outer baffle have an overlapping part in the generatrix direction of the conical air outlet door.
5. The gas flow vector control device of claim 1, wherein: the driving device comprises a connecting rod, the connecting rod is hinged with the outer side of the diffusion blade, the other end of the connecting rod is hinged with a pull rod parallel to the axis of the conical air outlet door, the periphery of the air outlet channel is a shell, and the pull rod penetrates through the shell.
6. The gas flow vector control apparatus of claim 5, wherein: the other ends of the pull rods penetrating through the shell are connected with a connecting plate, and the connecting plate is connected with an active pull rod driving the connecting plate to move along the direction parallel to the axis of the conical air outlet door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601175.3A CN111895409B (en) | 2020-06-29 | 2020-06-29 | Gas flow vector control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601175.3A CN111895409B (en) | 2020-06-29 | 2020-06-29 | Gas flow vector control device |
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| Publication Number | Publication Date |
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| CN111895409A true CN111895409A (en) | 2020-11-06 |
| CN111895409B CN111895409B (en) | 2022-03-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113059166A (en) * | 2021-02-22 | 2021-07-02 | 中国兵器科学研究院宁波分院 | EIGA shock wave awl device |
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| CN101832559A (en) * | 2009-02-27 | 2010-09-15 | 阿尔斯托姆科技有限公司 | Be used for the swirl block register design of wall fired burners |
| JP2016118353A (en) * | 2014-12-22 | 2016-06-30 | パナソニックＩｐマネジメント株式会社 | Diffusion combustion burner |
| CN107250555A (en) * | 2015-04-03 | 2017-10-13 | 三菱重工业株式会社 | Movable vane piece and axial-flow type rotating machinery |
| CN108759097A (en) * | 2018-07-05 | 2018-11-06 | 福建铁拓机械有限公司 | A kind of hot wind burner hearth, drying system and furnace drying method |
| CN109539251A (en) * | 2018-12-14 | 2019-03-29 | 罗诺克兹（北京）能源设备技术有限公司 | A kind of super low NO |
| CN110945252A (en) * | 2017-08-18 | 2020-03-31 | Abb涡轮系统有限公司 | Diffuser for radial compressor |
| CN111174204A (en) * | 2020-01-21 | 2020-05-19 | 无锡顺盟科技有限公司 | Low-nitrogen furnace internal reflux gas burner |
| CN111237757A (en) * | 2020-01-22 | 2020-06-05 | 北京纪祥节能科技有限公司 | Double-cone rotational flow premixing burner |
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2020
- 2020-06-29 CN CN202010601175.3A patent/CN111895409B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832559A (en) * | 2009-02-27 | 2010-09-15 | 阿尔斯托姆科技有限公司 | Be used for the swirl block register design of wall fired burners |
| JP2016118353A (en) * | 2014-12-22 | 2016-06-30 | パナソニックＩｐマネジメント株式会社 | Diffusion combustion burner |
| CN107250555A (en) * | 2015-04-03 | 2017-10-13 | 三菱重工业株式会社 | Movable vane piece and axial-flow type rotating machinery |
| CN110945252A (en) * | 2017-08-18 | 2020-03-31 | Abb涡轮系统有限公司 | Diffuser for radial compressor |
| CN108759097A (en) * | 2018-07-05 | 2018-11-06 | 福建铁拓机械有限公司 | A kind of hot wind burner hearth, drying system and furnace drying method |
| CN109539251A (en) * | 2018-12-14 | 2019-03-29 | 罗诺克兹（北京）能源设备技术有限公司 | A kind of super low NO |
| CN111174204A (en) * | 2020-01-21 | 2020-05-19 | 无锡顺盟科技有限公司 | Low-nitrogen furnace internal reflux gas burner |
| CN111237757A (en) * | 2020-01-22 | 2020-06-05 | 北京纪祥节能科技有限公司 | Double-cone rotational flow premixing burner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113059166A (en) * | 2021-02-22 | 2021-07-02 | 中国兵器科学研究院宁波分院 | EIGA shock wave awl device |
| CN113059166B (en) * | 2021-02-22 | 2022-12-20 | 中国兵器科学研究院宁波分院 | EIGA shock wave awl device |
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| Publication number | Publication date |
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| CN111895409B (en) | 2022-03-11 |
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