CN202733889U - Internal-mixing gas atomized fuel nozzle - Google Patents
Internal-mixing gas atomized fuel nozzle Download PDFInfo
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- CN202733889U CN202733889U CN 201220417333 CN201220417333U CN202733889U CN 202733889 U CN202733889 U CN 202733889U CN 201220417333 CN201220417333 CN 201220417333 CN 201220417333 U CN201220417333 U CN 201220417333U CN 202733889 U CN202733889 U CN 202733889U
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- fuel oil
- alevaire
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Abstract
The utility model relates to an internal-mixing gas atomized fuel nozzle which is applied to heating furnaces or combustion furnaces, belonging to a combustion device. The fuel nozzle comprises a fuel oil inlet, an atomizing agent inlet, a fuel oil spout, a primary atomizing agent spout, a secondary atomizing agent spout, a mixing chamber and a nozzle spout, wherein a gaseous atomizing agent sequentially passes through the atomizing agent inlet, the primary atomizing agent spout and the secondary atomizing agent spout and then enters the mixing chamber; liquid fuel oil sequentially passes through the fuel oil inlet and the fuel oil spout and then enters the mixing chamber; the gaseous atomizing agent and the liquid fuel oil are subjected to energy transfer in the mixing chamber so as to produce atomization for the first time; because the secondary atomizing agent spout is eccentric, a gas-liquid two-phase vortex is formed; and the fuel oil subjected to primary atomization is jetted out through the nozzle spout, and then under the action of ambient air, the atomization for the second time is produced, so that fuel oil droplets are further broken so as to form smaller atomized droplets. The nozzle disclosed by the utility model has the advantages of small sizes of fuel oil atomized particles, high evaporation speed, high combustion speed, good energy-saving effect and the like.
Description
Technical field
The utility model relates to a kind of internal-mixing gas atomization fuel nozzle, belongs to the high-efficiency energy-saving technology field, also belongs to environmental technology field.
Background technology
Nozzle is very important energy saving component on the burner.Play considerable effect in the process of gas atomization fuel nozzle liquid fuel within burning, the atomizing of liquid fuel process gas atomization agent in the nozzle mixing chamber, be broken into the tiny drop group of diameter, greatly increased the surface area of fuel, accelerated its evaporation rate, improve efficiency of combustion, played very important effect to energy-conservation.
Internal-mixing gas atomization fuel nozzle be fuel oil and Alevaire in the internal mix of nozzle, in mixing chamber, realize for the first time atomizing, realize for the second time atomizing at the nozzle nozzle, can obtain preferably atomization and desirable droplet distribution situation.At present, the fuel nozzle that petrochemical heating furnace is used nearly all is internal-mixing nozzle, but its Alevaire of the internal-mixing nozzle of traditional structure only has the one-level spout, and biphase gas and liquid flow is adherent ring-shaped liquid film, and fuel oil can not better be atomized; In addition in traditional internal-mixing nozzle structure, Alevaire and fuel oil head-on crash, the portion of energy of Alevaire passes to fuel oil, portion of energy consumes is destroying the distortion of liquid film structure or liquid film, some comprises energy loss and the loss of the collision energy between the Alevaire gas molecule of Alevaire and nozzle wall surface collision, the energy of Alevaire can not be fully utilized, and the Alevaire energy loss is larger, and capacity usage ratio is lower.
Therefore, improve fluid combustion efficient, the atomizing of liquid fuel quality will directly have influence on the height of efficiency of combustion, design efficient liquid fuel nozzle to improving fluid combustion efficient, energy savings, the discharging that reduces pollutant has very important meaning.
The utility model content
The technical problems to be solved in the utility model is: it is large to overcome existing traditional internal-mixing fuel nozzle Alevaire energy loss, the dissatisfactory difficult problem of liquid fuel atomization effect.A kind of simple in structure, design cost is low, atomization quality is high, energy-efficient internal-mixing gas atomization fuel nozzle is provided.
A kind of internal-mixing gas atomization fuel nozzle comprises fuel oil entrance, Alevaire entrance, fuel oil spout, Alevaire spout, mixing chamber and nozzle spout.It is characterized in that: the gas atomization agent enters mixing chamber (6) from Alevaire entrance (2) through Alevaire first order spout (4) and Alevaire second level spout (5) successively; Liquid-fuel oil enters mixing chamber (6) from fuel oil entrance (1) through fuel oil spout (3) successively; Gas atomization agent and liquid-fuel oil carry out the energy transmission in mixing chamber (6), produce for the first time atomizing, because described Alevaire second level spout (5) is eccentric, form the gas-liquid two-phase vortex; Fuel oil drop after the one-level atomizing under the air effect, produces for the second time atomizing around by nozzle spout (7) ejection, and fuel oil further is broken, and forms less atomized drop.
Above-mentioned internal-mixing gas atomization fuel nozzle is characterized in that being provided with eccentric Alevaire second level spout (5), spout quantity is 4-8, and eccentric throw is 1-5mm, and eccentric angle is 10-50 °, can make fuel oil produce eddy flow, the mixed effect of enhanced fuel oil and Alevaire.
Above-mentioned internal-mixing gas atomization fuel nozzle is characterized in that fuel oil entrance (1) diameter is φ 9-16mm, fuel oil nozzle diameter (3) is φ 3-7mm, Alevaire entrance (2) external diameter is φ 28-34mm, internal diameter is φ 24-27mm, 8-16 altogether of Alevaire first order spout (4) and Alevaire second level spout (5), diameter is φ 1-4mm, 6-12 altogether of nozzle spout (7), and diameter is φ 2-5mm.
Above-mentioned internal-mixing gas atomization fuel nozzle is characterized in that the optimum length of mixing chamber (6) is 70-80mm, and for the second time atomizing occurs in and leaves the nozzle downstream apart from the 100mm, and the fuel-oil atmozation particle diameter is 40-43 μ m.
Compare with traditional internal-mixing gas atomization oil burner, the utility model nozzle has that the fuel oil atomization particle diameter is little, and evaporation rate is fast, and burning velocity is fast, the advantages such as good energy-conserving effect.
Description of drawings
Fig. 1 is the utility model internal-mixing gas atomization fuel nozzle structure diagram.
Fig. 2 is traditional internal-mixing gas atomization fuel nozzle structure diagram.
The piece number name is called among Fig. 1 and Fig. 2: 1. fuel oil entrance, 2. Alevaire entrance, 3. fuel oil spout, 4. Alevaire first order spout, 5. Alevaire second level spout, 6. mixing chamber, 7. nozzle spout, 8. fuel oil entrance, 9. Alevaire entrance, 10. fuel oil spout, 11. Alevaire spouts, 12. mixing chamber, 13. nozzle spouts.
Specific embodiments
Further internal-mixing gas atomization fuel nozzle is described below in conjunction with accompanying drawing 1.
A kind of most preferred embodiment of internal-mixing gas atomization fuel nozzle, as shown in Figure 1, this internal-mixing gas atomization fuel nozzle comprises fuel oil entrance (1), Alevaire entrance (2), fuel oil spout (3), Alevaire first order spout (4), Alevaire second level spout (5), mixing chamber (6) and nozzle spout (7).Alevaire enters mixing chamber (6) from Alevaire entrance (2) through Alevaire first order spout (4) and Alevaire second level spout (5), fuel oil enters into mixing chamber (6) through fuel oil entrance (1) from fuel oil spout (3), Alevaire and fuel oil carry out the energy transmission in mixing chamber (6), utilize mutual extruding, acceleration and the shear action of Alevaire and fuel oil, strengthen the mixed effect of Alevaire and fuel oil, fuel oil is carried out the atomizing first time.Fuel oil carries out being sprayed by nozzle spout (7) after the atomizing in spray chamber (6) first time again, owing to exist pressure reduction inside and outside the nozzle, fuel oil is after nozzle spout (7) ejection, with relative static air on every side quite high speed difference is arranged, be subjected to the aerodynamic drag effect of surrounding medium air that for the second time atomizing occurs, for the second time atomizing further is broken into less drop with the fuel oil drop.
As preferably, the Alevaire second level spout (5) of 6 off-centre is set in internal-mixing gas atomization fuel nozzle, eccentric throw is 2mm, eccentric angle is 20 °.Because the eccentric structure of Alevaire second level spout makes fuel oil produce eddy flow, has strengthened the mixing quality of fuel oil and Alevaire.Two phase flow in the mixing chamber is interfered, and strengthens adherent liquid film mixing in the mixing chamber, makes the energy of Alevaire obtain further rationally utilizing, and produces atomizing effect well, improves efficiency of combustion.Avoided simultaneously Alevaire and fuel oil head-on crash, the energy loss of Alevaire reduces, and makes the fuel oil that passes to of Alevaire energy efficient.
As preferably, fuel oil entrance (1) diameter of internal-mixing gas atomization fuel nozzle is φ 12mm, fuel oil spout (3) diameter is φ 4mm, Alevaire entrance (2) external diameter is φ 32mm, internal diameter is φ 26mm, totally 12 of Alevaire first order spout (4) and Alevaire second level spouts (5), and diameter is φ 3mm, totally 12 of nozzle spouts (7), diameter is φ 3mm.
As preferably, the optimum length of internal-mixing gas atomization fuel nozzle mixing chamber (6) is 70-80mm, and for the second time atomizing occurs in the nozzle downstream apart from the 100mm, and the liquid fuel atomization particle diameter is 40-43 μ m.
Studies show that: when mixer length is 75mm, when gas liquid ratio is 0.3-0.7kg/kg, the average atomizing particle size of the utility model internal-mixing gas atomization fuel nozzle is than the little 30-40% of average atomizing particle size of traditional internal-mixing gas atomization fuel nozzle, and is helpful to improving efficiency of combustion.
Claims (4)
1. an internal-mixing gas atomization fuel nozzle comprises fuel oil entrance, Alevaire entrance, fuel oil spout, Alevaire spout, mixing chamber and nozzle spout.It is characterized in that: the gas atomization agent enters mixing chamber (6) from Alevaire entrance (2) through Alevaire first order spout (4) and Alevaire second level spout (5) successively; Liquid-fuel oil enters mixing chamber (6) from fuel oil entrance (1) through fuel oil spout (3) successively; Gas atomization agent and liquid-fuel oil carry out the energy transmission in mixing chamber (6), produce for the first time atomizing, because described Alevaire second level spout (5) is eccentric, form the gas-liquid two-phase vortex; Fuel oil drop after the one-level atomizing under the air effect, produces for the second time atomizing around by nozzle spout (7) ejection, and fuel oil further is broken, and forms less atomized drop.
2. a kind of internal-mixing gas atomization fuel nozzle according to claim 1 is characterized in that: be provided with eccentric Alevaire second level spout (5), spout quantity is 4-8, and eccentric throw is 1-5mm, and eccentric angle is 10-50 °.
3. a kind of internal-mixing gas atomization fuel nozzle according to claim 1, it is characterized in that: fuel oil entrance (1) diameter is φ 9-16mm, fuel oil nozzle diameter (3) is φ 3-7mm, Alevaire entrance (2) external diameter is φ 28-34mm, internal diameter is φ 24-27mm, 8-16 altogether of Alevaire first order spout (4) and Alevaire second level spout (5), and diameter is φ 1-4mm, 6-12 altogether of nozzle spout (7), diameter is φ 2-5mm.
4. a kind of internal-mixing gas atomization fuel nozzle according to claim 1, it is characterized in that: the optimum length of mixing chamber (6) is 70-80mm, for the second time atomizing occurs in and leaves the nozzle downstream apart from the 100mm, and the fuel-oil atmozation particle diameter is 40-43 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220417333 CN202733889U (en) | 2012-08-22 | 2012-08-22 | Internal-mixing gas atomized fuel nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220417333 CN202733889U (en) | 2012-08-22 | 2012-08-22 | Internal-mixing gas atomized fuel nozzle |
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| Publication Number | Publication Date |
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| CN202733889U true CN202733889U (en) | 2013-02-13 |
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| CN 201220417333 Expired - Fee Related CN202733889U (en) | 2012-08-22 | 2012-08-22 | Internal-mixing gas atomized fuel nozzle |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777899A (en) * | 2012-08-22 | 2012-11-14 | 常州大学 | Internal mixing type gas atomization fuel nozzle |
| CN105864762A (en) * | 2016-04-22 | 2016-08-17 | 唐山钢铁集团有限责任公司 | Fuel oil atomization method for pulverized coal burner and atomization device |
| CN109647240A (en) * | 2018-12-28 | 2019-04-19 | 西安交通大学 | A kind of method for organizing of atomizing jet stream and mainstream gas blending |
| JP2019141791A (en) * | 2018-02-21 | 2019-08-29 | パナソニックＩｐマネジメント株式会社 | Spray device |
| CN111852710A (en) * | 2020-07-29 | 2020-10-30 | 无锡工艺职业技术学院 | Fuel atomizing nozzle of engine |
| CN112902229A (en) * | 2021-03-12 | 2021-06-04 | 西北工业大学 | Combustion chamber evaporating pipe structure |
-
2012
- 2012-08-22 CN CN 201220417333 patent/CN202733889U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777899A (en) * | 2012-08-22 | 2012-11-14 | 常州大学 | Internal mixing type gas atomization fuel nozzle |
| CN102777899B (en) * | 2012-08-22 | 2015-04-01 | 常州大学 | Internal mixing type gas atomization fuel nozzle |
| CN105864762A (en) * | 2016-04-22 | 2016-08-17 | 唐山钢铁集团有限责任公司 | Fuel oil atomization method for pulverized coal burner and atomization device |
| JP2019141791A (en) * | 2018-02-21 | 2019-08-29 | パナソニックＩｐマネジメント株式会社 | Spray device |
| CN109647240A (en) * | 2018-12-28 | 2019-04-19 | 西安交通大学 | A kind of method for organizing of atomizing jet stream and mainstream gas blending |
| CN111852710A (en) * | 2020-07-29 | 2020-10-30 | 无锡工艺职业技术学院 | Fuel atomizing nozzle of engine |
| CN112902229A (en) * | 2021-03-12 | 2021-06-04 | 西北工业大学 | Combustion chamber evaporating pipe structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20150822 |
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| EXPY | Termination of patent right or utility model |