CN103900107A - Dual-fuel nozzle for plasma and gas-assisted atomization burning - Google Patents
Dual-fuel nozzle for plasma and gas-assisted atomization burning Download PDFInfo
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- CN103900107A CN103900107A CN201410085362.5A CN201410085362A CN103900107A CN 103900107 A CN103900107 A CN 103900107A CN 201410085362 A CN201410085362 A CN 201410085362A CN 103900107 A CN103900107 A CN 103900107A
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Abstract
The invention provides a dual-fuel nozzle for plasma and gas-assisted atomization burning. The dual-fuel nozzle for plasma and gas-assisted atomization burning comprises a gas circuit assembly, a plasma discharging assembly, an oil filtering assembly and a gas-assisted swirl nozzle assembly. Liquid fuel passes through the oil filtering assembly and then enters an annular discharging gap of the plasma discharging assembly in the radial direction, the fuel is partially cracked through dielectric barrier discharging to form a plasma micelle which is mixed into the fuel, and instant bursting and inflammability of the plasma micelle at an outlet of the dual-fuel nozzle are utilized for strengthening atomization; one part of gaseous fuel enters the gas-assisted swirl nozzle assembly from an inlet through an annular gas cavity surrounding an external electrode so as to conduct impact assisted atomization on the liquid fuel, and the other part of the gaseous fuel flows out in a rotating mode through a gas flow guiding plate so as to achieve the shearing action on the liquid fuel, so that liquid drops are atomized deeply. According to the dual-fuel nozzle for plasma and gas-assisted atomization burning, deep fuel atomization and stable flow rotation can be well achieved, stability and completeness of burning are improved, and pollutant emission is reduced.
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 fields such as the processing of ozone production, exhaust-gas treatment, material surface modifying, gaseous contaminant at present.Low-temperature plasma catalysis is to realize extremely effectively approach of the one of the low energy consumption of Plasma chemical reaction process, high yield, high selectivity.Dielectric barrier discharge technology is used for research and the processing of gaseous substance, and less for the catalyticing research of liquid.
2. double fuel gas turbine 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 that uses separately liquid or gaseous fuel, also has the function of two kinds of fuel multifuel combustions.So the performance quality of dual fuel nozzle, by directly having influence on the aspect such as igniting, efficiency of combustion and combustion stability of double fuel gas turbine, also can impact the life-span of combustion chamber flame drum and turbo blade simultaneously.
Traditional dual fuel nozzle exists liquid fuel atomizing effect after nozzle of oil circuit poor, thereby gas circuit fuel gas has caused fuel combustion incomplete through nozzle eddy flow effect is bad, flame is elongated, efficiency of combustion is low, combustion flame tube wall surface and a large amount of uncompleted burned carbon hydrogen compounds, caused 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 that improves the atomizing effect of liquid fuel, a kind of plasma that improves combustion position and the burning of gas assisted atomization.
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, the outside that external electrode is arranged on earthenware also and between earthenware 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 passage, the disk structure of perforate centered by gas guide board, hole around center has the hole of cutting sth. askew, fuel gas impact opening is set on nozzle body, fuel gas impact opening is connected respectively at the outlet of fuel gas passage and cyclone, on external electrode, have fuel oil entrance, fuel oil entrance is communicated with annular discharge gap, oil strainer is installed in fuel oil porch, fuel oil enters annular discharge gap by oil strainer and sprays by cyclone.
The present invention can also comprise:
1, the described gas guide board hole of cutting sth. askew is the rectangle hole of cutting sth. askew, and has 10, around centre bore and disk axis angle at 45 °.
2, described gas impact opening has 6-10, is circumferentially evenly arranged and becomes 30 ° of angles with nozzle body axis along nozzle body.
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 that is rich in plasma micelle enters after the auxiliary cyclone nozzle assembly of gas, ejection moment plasma micelle generation explosion makes fuel oil produce very tiny liquid mist, flow through the percussion of impact opening liquid towards fuel and the shear action of gas guide board eluting gas by fuel gas makes to spray liquid fuel and is broken for more tiny drop simultaneously, and then make fuel be easy to burning, improve flame propagation velocity, guarantee stability and the completeness of in low operating mode and thin situation, burning, 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 with impact opening;
Fig. 5 is fuel gas tangential flow guiding plate schematic diagram.
The specific embodiment
For example the present invention is described in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～5, low-temperature plasma assembly is connected on the dual fuel nozzle of plasma and the burning of gas assisted atomization by power supply attaching nut 1 external screw thread, provides dielectric barrier discharge required high voltage, and wherein interior 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 oil filter assemblies that oil filter housing 16 and support spring 17 form, radially enter into after filtering in annular discharge gap 21, under high voltage, the cracking of liquid fuel part forms the active micelle of plasma, 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, in the auxiliary eddy flow assembly of gas that cyclone 11 and cyclone housing 12 form, form under pressure eddy flow, spouting.Meanwhile, fuel gas is by by adopting the fuel gas import 19 that is connected of flange to enter in nozzle along fuel gas conduit 6 with gas handling system, can enter in nozzle body liquid towards fuel by the gas impact opening on nozzle body 9 and impact and act on and then strengthen its atomization when through the auxiliary eddy flow assembly of gas.Liquid fuel is realized the super-fine atomization of fuel droplets under the double action of plasma and fuel gas, and has guaranteed the inflammability under low operating mode and lean burn condition, reduces the discharge of NOx.Fuel gas is except a part is for percussion, and major part all goes out through gas guide board 13 eddy flows, realizes on the one hand the stable eddy flow of fuel gas, smooth combustion; On the other hand the liquid fuel being sprayed by nozzle body 9 is caused to the further atomized drop of shear action.Between gas guide board 13 and nozzle body 9 for the mode of closely cooperating is connected, the thread connecting mode adopting 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 cause danger.Inside and outside power supply attaching nut, all have screw thread, external screw thread is connected with power supply, and internal thread, for fixed sleeve part pipe, prevents the discharge instability causing because earthenware is crooked.China ink sealing ring 4, for the sealing between internal and external electrode, prevents that plasma from leaking, impact ionization effect.Whole discharge assembly extend into the interior employing welding manner of fuel gas conduit 6 and is connected, and can effectively save space.Sealing gasket 8 is for guaranteeing the sealing between atomizer and external electrode.Support spring 10 is for compressing cyclone 11, cyclone housing 12 and nozzle body 9, thereby assurance atomizing effect is good.Cyclone 11 and cyclone housing 12 are used for guaranteeing the eddy flow effect of fuel oil, improve atomization.
Double action by plasma and gaseous fuel can, from a point atomizing particle fineness for raising fuel oil, improve efficiency of combustion, reduces pollutant emission.
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, the auxiliary swirl nozzle assembly of gas; Liquid fuel radially enters into the annular discharge gap of plasma discharge assembly after by oily filter assemblies, pass through dielectric barrier discharge, fuel generating unit is divided cracking, form plasma micelle, blending is in fuel inside, utilize plasma micelle in the explosion of the moment of nozzle exit and inflammability thereof, strengthen atomization; Fuel gas enters into the auxiliary swirl nozzle assembly of gas by entrance through being surrounded on an annular air cavity part for external electrode outside, 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, makes the atomization of the drop degree of depth.
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 that are 2 × 7mm with disk axis angle at 45 ° size hole of cutting sth. askew 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, in wherein, is effectively avoided end arc discharge, guarantees Uniform discharge and the stability of region of discharge; Adopt pottery can effectively prevent discharge breakdown as block media, improve the service life of the dual fuel nozzle of plasma and the burning of gas assisted atomization.
The auxiliary swirl nozzle assembly of gas mainly comprises: 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, guarantees the alignment between support, cyclone, cyclone housing and nozzle body thereof, the phenomenons such as the cyclone that may occur while avoiding shell body loosening is crooked, guarantee good atomizing effect.
Nozzle body middle and lower part has along to be circumferentially evenly arranged 6-10 diameter be 2mm, and direction becomes the gas impact opening of 30 ° of angles through wall inside and outside housing, the percussion of the liquid fuel of assurance gas to eddy flow with axis.
Meet demand liquid and that gaseous state fuel flow rate changes by adjusting the radial dimension of 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, the outside that external electrode is arranged on earthenware also and between earthenware 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 passage, the disk structure of perforate centered by gas guide board, hole around center has the hole of cutting sth. askew, fuel gas impact opening is set on nozzle body, fuel gas impact opening is connected respectively at the outlet of fuel gas passage and cyclone, on external electrode, have fuel oil entrance, fuel oil entrance is communicated with annular discharge gap, oil strainer is installed in fuel oil porch, fuel oil enters annular discharge gap by oil strainer and sprays by cyclone.
2. the dual fuel nozzle of a kind of plasma according to claim 1 and gas assisted atomization burning, is characterized in that: the described gas guide board hole of cutting sth. askew is the rectangle hole of cutting sth. askew, and 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 gas assisted atomization burning, is characterized in that: described gas impact opening has 6-10, is circumferentially evenly arranged and becomes 30 ° of angles with nozzle body axis along nozzle body.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020743A (en) * | 2015-07-15 | 2015-11-04 | 哈尔滨工程大学 | Fuel autoxidation splitting and axial staged combustion chamber |
| CN106642102A (en) * | 2015-10-19 | 2017-05-10 | 伍镜清 | Gas burner capable of producing ionized gas flame |
| CN106770898A (en) * | 2016-11-24 | 2017-05-31 | 中国人民解放军装备学院 | Plasma enhancing liquid fuel Flammability limits research device based on opposed firing |
| CN107327354A (en) * | 2017-07-19 | 2017-11-07 | 中国人民解放军装备学院 | Coaxial DC formula plasma nozzle based on dielectric barrier discharge |
| CN108443912A (en) * | 2018-02-08 | 2018-08-24 | 中国船舶重工集团公司第七0三研究所 | A kind of self-priming air-assisted atomization dual fuel nozzle |
| CN110374776A (en) * | 2019-07-29 | 2019-10-25 | 大连民族大学 | A kind of engine dual-fuel nozzle of using plasma exciting technique |
| CN110410249A (en) * | 2019-07-29 | 2019-11-05 | 大连民族大学 | A kind of dual fuel nozzle and its application method |
| CN110410235A (en) * | 2019-07-29 | 2019-11-05 | 大连民族大学 | A kind of nozzle application method suitable for double gaseous fuels |
| CN110440291A (en) * | 2019-08-01 | 2019-11-12 | 沈阳航空航天大学 | Using the plasma fuel atomizer and control method of double mode excitation |
| CN110344975B (en) * | 2019-07-29 | 2021-08-17 | 大连民族大学 | Working method of dual-fuel nozzle of engine |
| CN115789701A (en) * | 2023-02-06 | 2023-03-14 | 中国人民解放军战略支援部队航天工程大学 | Discharge plasma enhanced mixing nozzle |
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| US20090165436A1 (en) * | 2007-12-28 | 2009-07-02 | General Electric Company | Premixed, preswirled plasma-assisted pilot |
| 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)
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| SU1562599A2 (en) * | 1988-07-15 | 1990-05-07 | Romanovskij Georgij F | Jet nozzle |
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2014
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090165436A1 (en) * | 2007-12-28 | 2009-07-02 | General Electric Company | Premixed, preswirled plasma-assisted pilot |
| 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 |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020743A (en) * | 2015-07-15 | 2015-11-04 | 哈尔滨工程大学 | Fuel autoxidation splitting and axial staged combustion chamber |
| CN106642102A (en) * | 2015-10-19 | 2017-05-10 | 伍镜清 | Gas burner capable of producing ionized gas flame |
| WO2017152826A1 (en) * | 2015-10-19 | 2017-09-14 | 伍镜清 | Fuel gas burner capable of generating ionized gas flame |
| CN106770898A (en) * | 2016-11-24 | 2017-05-31 | 中国人民解放军装备学院 | Plasma enhancing liquid fuel Flammability limits research device based on opposed firing |
| 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 |
| CN107327354A (en) * | 2017-07-19 | 2017-11-07 | 中国人民解放军装备学院 | Coaxial DC formula plasma nozzle based on dielectric barrier discharge |
| CN108443912A (en) * | 2018-02-08 | 2018-08-24 | 中国船舶重工集团公司第七0三研究所 | A kind of self-priming air-assisted atomization dual fuel nozzle |
| 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 |
| CN110410249A (en) * | 2019-07-29 | 2019-11-05 | 大连民族大学 | A kind of dual fuel nozzle and its application method |
| CN110410235A (en) * | 2019-07-29 | 2019-11-05 | 大连民族大学 | A kind of nozzle application method suitable for double gaseous fuels |
| CN110410235B (en) * | 2019-07-29 | 2021-06-22 | 大连民族大学 | Nozzle using method suitable for double-gas fuel |
| 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 |
| CN110344975B (en) * | 2019-07-29 | 2021-08-17 | 大连民族大学 | Working method of dual-fuel nozzle of engine |
| CN110374776A (en) * | 2019-07-29 | 2019-10-25 | 大连民族大学 | A kind of engine dual-fuel nozzle of using plasma exciting technique |
| CN110440291A (en) * | 2019-08-01 | 2019-11-12 | 沈阳航空航天大学 | Using the plasma fuel atomizer and control method of double mode excitation |
| CN115789701A (en) * | 2023-02-06 | 2023-03-14 | 中国人民解放军战略支援部队航天工程大学 | Discharge plasma enhanced mixing nozzle |
| 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 |
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