CN103900107B - The dual fuel nozzle of a kind of plasma and the burning of gas assisted atomization - Google Patents
The dual fuel nozzle of a kind of plasma and the burning of gas assisted atomization Download PDFInfo
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- CN103900107B CN103900107B CN201410085362.5A CN201410085362A CN103900107B CN 103900107 B CN103900107 B CN 103900107B CN 201410085362 A CN201410085362 A CN 201410085362A CN 103900107 B CN103900107 B CN 103900107B
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Abstract
The object of the present invention is to provide the dual fuel nozzle of a kind of plasma and the burning of gas assisted atomization, comprise gas circuit assembly, plasma discharge assembly, oily filter assemblies and gas and assist swirl nozzle assembly; Liquid fuel is by radially entering into the annular discharge gap of plasma discharge assembly after oily filter assemblies, pass through dielectric barrier discharge, the cracking of fuel generating portion, form plasma micelle, blending is inner in fuel, utilize plasma micelle in the moment explosion of nozzle exit and inflammability thereof, strengthen atomization; Fuel gas enters into gas by the annular air cavity part of entrance through being surrounded on external electrode outside and assists swirl nozzle assembly, liquid towards fuel carries out percussive assist atomization, another part goes out via gas guide board eddy flow, and liquid towards fuel produces shear action, and the drop degree of depth is atomized.The present invention can realize fuel depth atomization well and stablize eddy flow, improves flameholding, completeness, reduces pollutant emission.
Description
Technical field
What the present invention relates to is a kind of gas turbine, the specifically nozzle mechanism of gas turbine.
Background technology
1. dielectric barrier discharge technology: dielectric barrier discharge technology is the one of low-temperature plasma catalysis, is mainly used in the technical field such as process of ozone production, exhaust-gas treatment, material surface modifying, gaseous contaminant at present.Low-temperature plasma catalysis is the extremely effective approach of one realizing the low energy consumption of Plasma chemical reaction process, high yield, high selectivity.Dielectric barrier discharge technology is used for research and the process of gaseous substance, and for catalyticing research less of liquid.
2. dual-fuel gas wheel machine technology: gas turbine is a kind of typical conventional fuel power set.It has that volume is little, power is large, lightweight and start the features such as fast, be widely used in the industrial core realms such as aviation, electric power, naval vessel and natural gas transport.Adopt being applied more and more widely of dual-fuel gas turbine, its requirement not only has the function using separately liquid or gaseous fuel, also has the function of two kinds of fuel multifuel combustions.So the performance of dual fuel nozzle is good and bad by directly having influence on the aspects such as the igniting of dual-fuel gas turbine, efficiency of combustion and combustion stability, also can impact the life-span of combustion chamber flame drum and turbo blade simultaneously.
Liquid fuel atomizing effect after nozzle that traditional dual fuel nozzle exists oil circuit is poor, gas circuit fuel gas is through nozzle eddy flow effect is bad thus to result in fuel combustion incomplete, flame is elongated, efficiency of combustion is low, combustion flame tube wall surface and a large amount of uncompleted burned carbon hydrogen compounds, cause severe contamination problem.Improve the liquid towards fuel atomizing effect of dual fuel nozzle, improve combustion position, improve combustion stability and reduce discharge by significant.
Summary of the invention
The object of the present invention is to provide the dual fuel nozzle of the atomizing effect improving liquid fuel, a kind of plasma improving combustion position and gas assisted atomization burning.
The object of the present invention is achieved like this:
The dual fuel nozzle of a kind of plasma of the present invention and the burning of gas assisted atomization, it is characterized in that: comprise external electrode, interior electrode, earthenware, injection equipment, interior electrode is wrapped in earthenware, the top closure of earthenware, external electrode is arranged between the also outside of earthenware and earthenware and forms annular discharge gap, injection equipment comprises cyclone, cyclone support, nozzle body, support spring, cyclone housing, gas guide board, cyclone support and nozzle body are fixed on the bottom of external electrode, the bottom of cyclone support, cyclone equipment shell body is positioned in nozzle body, cyclone is arranged in cyclone housing, between cyclone and cyclone support, support spring is installed, realize being rigidly connected between cyclone support and cyclone, external electrode outer setting fuel gas conduit, gas guide board is arranged on external electrode bottom, fuel gas conduit and external electrode, nozzle body, external electrode bottom forms fuel gas passageway, the disk structure of perforate centered by gas guide board, hole around center has hole of cutting sth. askew, nozzle body is arranged fuel gas impact opening, fuel gas impact opening is connected with the outlet of cyclone respectively at fuel gas passageway, external electrode has fuel oil entrance, fuel oil entrance is communicated with annular discharge gap, oil strainer is installed in fuel oil porch, fuel oil is entered annular discharge gap by oil strainer and is sprayed by cyclone.
The present invention can also comprise:
1, described gas guide board hole of cutting sth. askew is that rectangle is cut sth. askew hole, has 10, around centre bore and disk axis angle at 45 °.
2, described gas impact opening has 6-10, is evenly arranged and becomes 30 ° of angles with nozzle body axis along nozzle body circumference.
Advantage of the present invention is: liquid fuel is after dielectric barrier discharge catalysis, and part of fuel is cracked into fuel fragment and activating component, forms gas plasma micelle, is contained in the middle of liquid fuel.The liquid fuel being rich in plasma micelle enters after gas assists cyclone nozzle assembly, ejection moment plasma micelle generation explosion makes fuel oil produce very tiny liquid mist, the shear action of the percussion and gas guide board eluting gas that simultaneously flow through impact opening liquid towards fuel by fuel gas makes ejection liquid fuel be broken for more tiny drop, and then make fuel be easy to burning, improve flame propagation velocity, the stability of burning under ensureing low operating mode and thin situation and completeness, reduce the discharge of pollutant.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is A-A view;
Fig. 3 is nozzle head partial enlarged drawing;
Fig. 4 is the nozzle body schematic diagram of band impact opening;
Fig. 5 is fuel gas tangential flow guiding plate schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 5, low-temperature plasma assembly is connected on the dual fuel nozzle of plasma and the burning of gas assisted atomization by the external screw thread of power supply attaching nut 1, provides high voltage needed for dielectric barrier discharge, and wherein, electrode 3 connects high-pressure side, external electrode 5 connecting to neutral.Liquid fuel enters into by oil baffle 14 by welding and the liquid fuel inlet port joint 18 on external electrode 5, oil cleaner screen 15, in the middle of the fuel filter assembly that oil filter housing 16 and support spring 17 are formed, radially enter into after filtering in annular discharge gap 21, the cracking of liquid fuel part forms plasma activated micelle under high voltages, being contained in liquid fuel inside together flows into by cyclone support 7 with liquid fuel, seal washer 8, nozzle body 9, support spring 10, the gas that cyclone 11 and cyclone housing 12 are formed is assisted in eddy flow assembly, form eddy flow under pressure, spouting.Meanwhile, fuel gas, by by adopting the fuel gas inlet 19 of Flange joint to enter in nozzle along fuel gas conduit 6 with gas handling system, can be entered the effect of impacting of liquid towards fuel in nozzle body when assisting eddy flow assembly through gas and then strengthening its atomization by the gas impact opening on nozzle body 9.Liquid fuel realizes the super-fine atomization of fuel droplets under the double action of plasma and fuel gas, and ensure that the inflammability under low operating mode and lean burn conditions, reduces the discharge of NOx.Fuel gas is except a part is used for percussion, and major part all goes out through gas guide board 13 eddy flow, realizes the stable eddy flow of fuel gas on the one hand, smooth combustion; On the other hand the further atomized drop of shear action is caused to the liquid fuel sprayed by nozzle body 9.For close fit is connected between gas guide board 13 with nozzle body 9, the thread connecting mode adopted with fuel gas conduit 6.
Dielectric barrier discharge assembly is made up of external electrode 5, interior electrode 3, earthenware 2, power supply attaching nut 1 and graphite grazing packing ring 4.Interior electrode is wrapped in earthenware completely, because its dielectric constant is larger, can effectively prevent from a little puncturing and causing danger.All have screw thread inside and outside power supply attaching nut, external screw thread is connected with power supply, and internal thread is used for fixed sleeve part pipe, prevents the discharge instability caused because earthenware is crooked.Ink sealing ring 4, for the sealing between internal and external electrode, prevents plasma from leaking, impact ionization effect.Whole discharge assembly extend in fuel gas conduit 6 and adopts welding manner to be connected, and effectively can save space.Sealing gasket 8 is for ensureing the sealing between atomizer and external electrode.Support spring 10 for compressing cyclone 11, cyclone housing 12 and nozzle body 9, thus ensures that atomizing effect is good.Cyclone 11 and cyclone housing 12 are used for ensureing the eddy flow effect of fuel oil, improve atomization.
From a point atomizing particle fineness for raising fuel oil, efficiency of combustion can be improved, reduces pollutant emission by the double action of plasma and gaseous fuel.
The dual fuel nozzle of a kind of plasma of the present invention and the burning of gas assisted atomization, mainly comprises gas circuit assembly, cold plasma discharge assembly, oily filter assemblies, gas assists swirl nozzle assembly; Liquid fuel is by radially entering into the annular discharge gap of plasma discharge assembly after oily filter assemblies, pass through dielectric barrier discharge, the cracking of fuel generating portion, form plasma micelle, blending is inner in fuel, utilize plasma micelle in the moment explosion of nozzle exit and inflammability thereof, strengthen atomization; Fuel gas enters into gas by the annular air cavity part of entrance through being surrounded on external electrode outside and assists swirl nozzle assembly, liquid towards fuel carries out percussive assist atomization, another part goes out via gas guide board eddy flow, and liquid towards fuel produces shear action, and the drop degree of depth is atomized.
Gas circuit assembly is made up of gas path pipe and gas guide board.
The disk structure of perforate centered by gas guide board, has 10 rectangles being 2 × 7mm with disk axis angle at 45 ° size to cut sth. askew hole around centre bore, and dish end face has hexahedron nut structure for fixing.
Cold plasma discharge assembly mainly comprises: external electrode, ceramic block media, interior electrode.Wherein, ceramic block media is designed to top closure pattern, and interior electrode is in wherein, effectively avoids end arc discharge, ensures Uniform discharge and the stability of region of discharge; Adopt pottery effectively can prevent discharge breakdown as block media, improve the service life of the dual fuel nozzle of plasma and the burning of gas assisted atomization.
Gas assists swirl nozzle assembly mainly to comprise: cyclone support, seal washer, support spring, cyclone, cyclone housing and nozzle body.Wherein, support spring should have enough rigidity, realizes being rigidly connected between support and cyclone, namely ensures the alignment between support, cyclone, cyclone housing and nozzle body thereof, the phenomenons such as the cyclone that may occur when avoiding shell body to loosen is crooked, ensure good atomizing effect.
Nozzle body middle and lower part has and is circumferentially evenly arranged 6-10 diameter is 2mm, and direction becomes 30 ° of angles through the gas impact opening of wall inside and outside housing with axis, ensures that gas is to the percussion of the liquid fuel of eddy flow.
Demand that the is liquid and change of gaseous state fuel flow rate is met by the radial dimension of adjustment internal and external electrode and gas path pipe.
Claims (3)
1. the dual fuel nozzle of a plasma and the burning of gas assisted atomization, it is characterized in that: comprise external electrode, interior electrode, earthenware, injection equipment, interior electrode is wrapped in earthenware, the top closure of earthenware, external electrode is arranged between the also outside of earthenware and earthenware and forms annular discharge gap, injection equipment comprises cyclone, cyclone support, nozzle body, support spring, cyclone housing, gas guide board, cyclone support and nozzle body are fixed on the bottom of external electrode, the bottom of cyclone support, cyclone equipment shell body is positioned in nozzle body, cyclone is arranged in cyclone housing, between cyclone and cyclone support, support spring is installed, realize being rigidly connected between cyclone support and cyclone, namely support is ensured, cyclone, alignment between cyclone housing and nozzle body thereof, external electrode outer setting fuel gas conduit, gas guide board is arranged on external electrode bottom, fuel gas conduit and external electrode, nozzle body, external electrode bottom forms fuel gas passageway, the disk structure of perforate centered by gas guide board, hole around center has hole of cutting sth. askew, nozzle body is arranged fuel gas impact opening, fuel gas impact opening is connected with the outlet of cyclone with fuel gas passageway respectively, external electrode has fuel oil entrance, fuel oil entrance is communicated with annular discharge gap, oil strainer is installed in fuel oil porch, fuel oil is entered annular discharge gap by oil strainer and is sprayed by cyclone.
2. the dual fuel nozzle of a kind of plasma according to claim 1 and the burning of gas assisted atomization, is characterized in that: described gas guide board hole of cutting sth. askew is that rectangle is cut sth. askew hole, has 10, around centre bore and disk axis angle at 45 °.
3. the dual fuel nozzle of a kind of plasma according to claim 1 and 2 and the burning of gas assisted atomization, is characterized in that: described fuel gas impact opening has 6-10, is evenly arranged and becomes 30 ° of angles with nozzle body axis along nozzle body circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410085362.5A CN103900107B (en) | 2014-03-11 | 2014-03-11 | The dual fuel nozzle of a kind of plasma and the burning of gas assisted atomization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410085362.5A CN103900107B (en) | 2014-03-11 | 2014-03-11 | The dual fuel nozzle of a kind of plasma and the burning of gas assisted atomization |
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| Publication Number | Publication Date |
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| CN103900107A CN103900107A (en) | 2014-07-02 |
| CN103900107B true CN103900107B (en) | 2015-12-02 |
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| CN201410085362.5A Expired - Fee Related CN103900107B (en) | 2014-03-11 | 2014-03-11 | The dual fuel nozzle of a kind of plasma and the burning of gas assisted atomization |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020743B (en) * | 2015-07-15 | 2017-10-03 | 哈尔滨工程大学 | A kind of fuel autoxidation cracks axially staged combustion chamber |
| CN106642102A (en) * | 2015-10-19 | 2017-05-10 | 伍镜清 | Gas burner capable of producing ionized gas flame |
| CN106770898B (en) * | 2016-11-24 | 2019-03-01 | 中国人民解放军战略支援部队航天工程大学 | Plasma enhancing liquid fuel Flammability limits research device based on opposed firing |
| CN107327354B (en) * | 2017-07-19 | 2018-12-25 | 中国人民解放军装备学院 | Coaxial DC formula plasma nozzle based on dielectric barrier discharge |
| CN108443912B (en) * | 2018-02-08 | 2023-10-03 | 中国船舶重工集团公司第七0三研究所 | Self-priming air-assisted atomization dual-fuel nozzle |
| CN110410235B (en) * | 2019-07-29 | 2021-06-22 | 大连民族大学 | Nozzle using method suitable for double-gas fuel |
| CN110344975B (en) * | 2019-07-29 | 2021-08-17 | 大连民族大学 | Working method of dual-fuel nozzle of engine |
| CN110374776B (en) * | 2019-07-29 | 2021-07-13 | 大连民族大学 | Engine dual-fuel nozzle adopting plasma excitation technology |
| CN110410249B (en) * | 2019-07-29 | 2021-08-17 | 大连民族大学 | Dual-fuel nozzle and using method thereof |
| CN110440291B (en) * | 2019-08-01 | 2020-06-30 | 沈阳航空航天大学 | Plasma fuel atomizing nozzle adopting dual-mode excitation and control method |
| CN115789701B (en) * | 2023-02-06 | 2023-06-02 | 中国人民解放军战略支援部队航天工程大学 | Discharge plasma enhanced blending nozzle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1562599A2 (en) * | 1988-07-15 | 1990-05-07 | Romanovskij Georgij F | Jet nozzle |
| CN102721081A (en) * | 2012-06-26 | 2012-10-10 | 哈尔滨工程大学 | Nozzle for enhancing atomization by plasma |
| CN103244954A (en) * | 2013-06-02 | 2013-08-14 | 衢州昀睿工业设计有限公司 | Plasma heavy oil burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090165436A1 (en) * | 2007-12-28 | 2009-07-02 | General Electric Company | Premixed, preswirled plasma-assisted pilot |
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2014
- 2014-03-11 CN CN201410085362.5A patent/CN103900107B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1562599A2 (en) * | 1988-07-15 | 1990-05-07 | Romanovskij Georgij F | Jet nozzle |
| CN102721081A (en) * | 2012-06-26 | 2012-10-10 | 哈尔滨工程大学 | Nozzle for enhancing atomization by plasma |
| CN103244954A (en) * | 2013-06-02 | 2013-08-14 | 衢州昀睿工业设计有限公司 | Plasma heavy oil burner |
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| CN103900107A (en) | 2014-07-02 |
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