CN104566378A - Burner nozzle based on electric arc discharge plasma - Google Patents
Burner nozzle based on electric arc discharge plasma Download PDFInfo
- Publication number
- CN104566378A CN104566378A CN201310520201.XA CN201310520201A CN104566378A CN 104566378 A CN104566378 A CN 104566378A CN 201310520201 A CN201310520201 A CN 201310520201A CN 104566378 A CN104566378 A CN 104566378A
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- CN
- China
- Prior art keywords
- nozzle
- electrode
- burner nozzle
- burner
- arc discharge
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Classifications
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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
- F23D14/48—Nozzles
Abstract
The invention provides a burner nozzle based on electric arc discharge plasma. According to the burner nozzle, gas around the nozzle is heated by means of high-voltage discharge; meanwhile, a plurality of active particles which have contribution to a combustion reaction are produced. Compared with anti-extinguishment devices of other types, the process of generating the active particles has the advantages of more stable performance, lower power consumption, prevention of extinguishing of the burner with less electric energy, and extremely low running cost.
Description
Technical field
The present invention relates to burner field, particularly relate to a kind of burner nozzle based on arc discharge plasma.
Background technology
All some low-calorie gaseous fuels can be produced in the production process of chemical industry, petroleum industry, steel and iron industry.For blast furnace gas, it is the associated gas that ironmaking processes produces, H in combustible component
2less, and inert gas CO
2, N
2more, calorific value is only 2.5 ~ 3.5MJ/Nm
3.The problem that gas turbine runs into when burning blast-furnace gas has:
(1) calorific value is lower makes ignition difficulties;
(2) H
2content is less makes poor combustion stability, lean state easily occurs and stops working;
(3) easily there is the phenomenon of CO incomplete combustion under running on the lower load, cause efficiency of combustion obviously to decline.
The current main method addressed these problems has: (1) uses coke-stove gas to be blended in blast furnace gas to improve calorific value, and burning is easily organized; (2) using blast furnace gas and fuel oil two kinds of fuel in a combustion chamber, fuel oil can be switched at any time when lacking blast furnace gas (underload), to guarantee flameholding; (3) light diesel or coke-stove gas point is used to fight as flame on duty with smooth combustion.Coke-stove gas, fuel oil and diesel oil etc. are all high-grade energies relative to blast furnace gas, expend these high-grade energies in a large number, can increase system operation cost undoubtedly, economic benefit is had a greatly reduced quality in order to effectively utilize blast furnace gas.Therefore, in the urgent need to finding a kind of more simply effective, economical and practical method to the flame-out problem preventing low calorific value gas fuel in gas-turbine combustion chamber.
In addition, at aerospace field, for aero-engine, when occurring flame-out in high-altitude, requirement can be lighted a fire again.Due to the aerial rarefaction of air of height, content of oxygen in air is low, and pressure and temperature is low, and same needs adopts the device preventing from stopping working.
Summary of the invention
(1) technical problem that will solve
In view of above-mentioned technical problem, the invention provides a kind of simply effective, economical and practical burner nozzle based on arc discharge plasma.
(2) technical scheme
According to an aspect of the present invention, a kind of burner nozzle based on arc discharge plasma is provided.This burner nozzle comprises: high-voltage ac power; Nozzle body, in a tubular form, N number of nozzle bore is formed at its top in its underpart, and the earth terminal of itself and high-voltage ac power is electrically connected; Arc discharge assembly, is fixed on the central authorities of nozzle body, and its top has downwards and arranges the electrode of M metal material towards nozzle bore, and the high-pressure side of this M electrode and high-voltage ac power is electrically connected; Wherein, this burner nozzle in working order under, arc discharge is produced between nozzle body part around any one and respective nozzle hole in M electrode, to heat the fuel gas sprayed by nozzle bore, and be active ion by the fuel gas molecular ionization of part, to promote the burning of fuel gas.
(3) beneficial effect
As can be seen from technique scheme, the burner nozzle that the present invention is based on arc discharge plasma has following beneficial effect:
(1) electrion is utilized, gas around nozzle is heated, produce the multiple active particle contributing to combustion reaction and carry out simultaneously, the process of this generation active particle is more stable compared to the anti-flame device performance of other types, power consumption is lower, only consuming less electricity just can prevent burner from stopping working, and operating cost is extremely low;
(2) device overall simple is compact, and volume is little, and only need change the nozzle segment of existing burner, do not need to be equipped with other igniter, the cost applied is lower;
(3) discharge parameter that can be different for different regulating working conditions is to satisfy the demands, simple to operate, flexible configuration.
Accompanying drawing explanation
Figure 1A is according to the structural representation of the embodiment of the present invention based on arc discharge plasma burner nozzle;
Figure 1B partly cuts open stereogram for burner nozzle shown in Figure 1A;
Fig. 2 A is the close-up plan view of the upper part of burner nozzle shown in Figure 1A;
Fig. 2 B is the stereogram of the upper part of burner nozzle shown in Figure 1A.
[main element symbol description of the present invention]
10-high-voltage ac power;
11-high-pressure side; 12-earth terminal;
20-nozzle body;
21-gas passage; 22,23-nozzle bore;
24-gas stable cavity; 25-gas access;
30-arc discharge assembly
31-support set; 32-second insulating part;
33-metal bar; 34-electrodes base;
35-first insulating part; 36,37-electrode.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.It should be noted that, in accompanying drawing or description describe, similar or identical part all uses identical figure number.The implementation not illustrating in accompanying drawing or describe is form known to a person of ordinary skill in the art in art.In addition, although herein can providing package containing the demonstration of the parameter of particular value, should be appreciated that, parameter without the need to definitely equaling corresponding value, but can be similar to corresponding value in acceptable error margin or design constraint.The direction term mentioned in embodiment, such as " on ", D score, "front", "rear", "left", "right" etc., be only the direction with reference to accompanying drawing.Therefore, the direction term of use is used to illustrate and is not used for limiting the scope of the invention.
In the present invention, multiple electrode is arranged near burner nozzle aperture, after electrode connects high-tension electricity, neighbouring gas ionization is produced plasma, the plasma that produced on the one hand can heated air, the active particle promoting that combustion reaction is carried out can be produced on the other hand, and then reach burner igniting and prevent that burner occurs in combustion process flame-out.
In one exemplary embodiment of the present invention, propose a kind of burner nozzle based on arc discharge plasma.Figure 1A is according to the structural representation of the embodiment of the present invention based on arc discharge plasma burner nozzle; Figure 1B partly cuts open stereogram for burner nozzle shown in Figure 1A.Please refer to Figure 1A and Figure 1B, the present embodiment burner nozzle comprises: high-voltage ac power 10; Nozzle body 20, is prepared by metal material, and in a tubular form, N number of nozzle bore (22,23) is formed at its top in its underpart, and the earth terminal of itself and high-voltage ac power 10 is electrically connected; Arc discharge assembly 30, is fixed on the central authorities of nozzle body 20, and its top has downwards and arranges M electrode (36,37) towards nozzle bore, and this M electrode (36,37) is electrically connected with the high-pressure side of high-voltage ac power 10; Wherein, burner nozzle in working order under, arc discharge is produced between electrode (36,37) and nozzle bore (22,23) nozzle body part around, to heat the fuel gas sprayed by nozzle bore, and be active ion by the fuel gas molecular ionization of part, to promote the burning of fuel gas.
In the present embodiment, owing to not having dielectric to stop between electrode (36,37) and nozzle bore (22,23), what therefore produce is arc discharge, and the plasma that electric discharge produces can heated air generate various active particle.Active particle serves important function in combustion reaction, this is because the chemical reaction of oxidized, particularly chain reaction is undertaken by the active centre (chain carrier) generated, these active centres are atom and group isoreactivity particle normally, and the speed of chain reaction depends on the concentration of active particle in combustion zone.Therefore, if before combustion or utilize discharge plasma to produce the active component of some in Wei Ran district in combustion process, igniting can be played and prevent the effect of stopping working.
Below respectively the various piece of the present embodiment based on arc discharge plasma burner nozzle is described in detail.
The voltage of high-voltage ac power 10 is can the voltage of activated plasma in prior art, and those skilled in the art clearly can know the scope of this voltage.Generally, the scope of this voltage is 500V-50kV.Preferably, this high-voltage ac power is adjustable power supply, with can be different for different regulating working conditions discharge parameter to satisfy the demands, its output voltage range is between 500V-50kV, and its reference frequency output is between 100Hz-200kHz.
In the present embodiment, nozzle body 20 is similar with nozzle of the prior art.Fuel gas is entered the gas stable cavity 24 of lower end by gas access 25 by pipeline, then stable air-flow passes through gas passage 21, by ejections such as nozzle bores (22,23).Wherein, nozzle bore (22, the 23) adjacent material of nozzle body top outer rim is metal material, as stainless steel, high-temperature alloy.
Fig. 2 A is the close-up plan view of the upper part of burner nozzle shown in Figure 1A.Fig. 2 B is the stereogram of the upper part of burner nozzle shown in Figure 1A.Please refer to Fig. 2 A and Fig. 2 B, the present embodiment arc discharge assembly 30 comprises: support set 31, and it is fixed on the tubular lower of nozzle body equally in a tubular form; Metal bar 33, its underpart is sheathed in support set 31, and has the second insulating part 32 between support set 31; Electrodes base 34, its underpart and metal bar 33 are electrically connected; M electrode (36,37), respectively in inverted "L" shaped, electrodes base 34 is fixed in its lower end, and its upper end is stretched out to a lateral buckling after nozzle body 20, and aims at corresponding nozzle bore down; Wherein, the periphery of the lower end of metal bar 33 top, electrodes base 34 and M electrode has the first insulating part 35.
Support set 31 plays fixing and support the second insulating part 32 and metal bar 33 effect.Metal bar 33 is connected with electrodes base 34, plays the effect of conduction, and material is copper or aluminium.
First insulating part 35 is high-temperature insulation material, its effect avoids discharging between electrode and the metal of nozzle interior, this insulating materials is positioned at nozzle exit, and during burner operation, this place's temperature is higher, therefore needs to select as high-temperature insulation materials such as pottery, quartz glass.Second insulating part 32, for preventing metal bar and surrounding metal from discharging, because this place is away from nozzle, temperature is not high, therefore selects polytetrafluoroethylene (PTFE) as insulating materials.
Please refer to Fig. 2 A and Fig. 2 B, in the present embodiment, nozzle bore number N is 4, and electrode number M is 4, i.e. the corresponding electrode of each nozzle bore, but the present invention is not as limit.In the present invention, electrode number is at least 1, is no more than at most the number of nozzle bore.When electrode number is identical with nozzle bore number, a nozzle bore answered by each electrode pair.When electrode number is less than nozzle bore number, can every one, two or more nozzle bores arrange an electrode.The value of M can between 2 ~ 10, and the value of N also can between 2 ~ 10.
In the present invention, the material of electrode can be tungsten, molybdenum or high-temperature alloy.The vertical range of eletrode tip and nozzle hole outlets place plane can between 1mm-50mm.The tip of electrode can between 0-50mm in the projector distance nozzle bore centre distance of nozzle hole outlets place plane.
The cross section of electrode is circle, ellipse, triangle, quadrangle, polygon.When the cross section of electrode is circular, its diameter can between 0.1-10mm.When the cross section of electrode is oval, its long axis length can between 0.1-10mm.When the cross section of electrode is triangle, quadrangle, polygon, its length of side can between 0.1-10mm.In addition, the tip of electrode can be taper shape, elliptic cone, triangular pyramid, rectangular pyramid shape, polygonal pyramid shape.
So far, by reference to the accompanying drawings the present embodiment has been described in detail.Describe according to above, those skilled in the art should have the burner nozzle that the present invention is based on arc discharge plasma and have clearly been familiar with.
In addition, the above-mentioned definition to each element and method is not limited in various concrete structures, shape or the mode mentioned in embodiment, and those of ordinary skill in the art can change simply it or replace.
In sum, the invention provides a kind of burner nozzle based on arc discharge plasma, it can be used for the industries such as aviation, chemical industry, generating, metallurgy, under gas turbine off-design behaviour can be solved, lower heat of combustion gas time flame-out problem, and the problem that aero-engine high-altitude is flame-out.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. based on a burner nozzle for arc discharge plasma, it is characterized in that, comprising:
High-voltage ac power;
Nozzle body, in a tubular form, N number of nozzle bore is formed at its top in its underpart, and the earth terminal of itself and high-voltage ac power is electrically connected;
Arc discharge assembly, is fixed on the central authorities of described nozzle body, and its top has downwards and arranges the electrode of M metal material towards described nozzle bore, and the high-pressure side of this M electrode and high-voltage ac power is electrically connected;
Wherein, this burner nozzle in working order under, arc discharge is produced between nozzle body part around any one and respective nozzle hole in a described M electrode, to heat the fuel gas sprayed by described nozzle bore, and be active ion by the fuel gas molecular ionization of part, to promote the burning of described fuel gas.
2. burner nozzle according to claim 1, is characterized in that, described high-voltage ac power is regulated power supply, and its output voltage range is between 500V-50kV, and its reference frequency output is between 100Hz-200kHz.
3. burner nozzle according to claim 1, is characterized in that, the material of described electrode is tungsten, molybdenum or high-temperature alloy.
4. burner nozzle according to claim 1, is characterized in that, the nozzle bore adjacent material of described nozzle body top outer rim is stainless steel or high-temperature alloy.
5. burner nozzle according to claim 1, is characterized in that, the tip of described electrode and the vertical range of nozzle hole outlets place plane are between 1mm-50mm; The tip of described electrode in the projector distance nozzle bore centre distance of nozzle hole outlets place plane between 0-50mm.
6. burner nozzle according to claim 1, is characterized in that, described arc discharge assembly comprises:
Support set, in a tubular form, is fixed on the tubular lower of described nozzle body;
Metal bar, its underpart is sheathed in described support set, and has the second insulating part between described support set;
Electrodes base, its underpart and described metal bar are electrically connected;
A described M electrode, respectively in inverted "L" shaped, described electrodes base is fixed in its lower end, and its upper end is stretched out to a lateral buckling after nozzle body, and aims at corresponding nozzle bore down;
Wherein, the periphery of the lower end of the top of described metal bar, electrodes base and M electrode has the first insulating part.
7. burner nozzle according to claim 6, is characterized in that, the material of described first insulating part is pottery or quartz glass, and described second insulating materials is polytetrafluoroethylene (PTFE).
8. burner nozzle according to claim 6, is characterized in that, the material of described metal bar and electrodes base is copper or aluminium.
9. burner nozzle according to claim 6, is characterized in that, the cross section of described electrode is circle, ellipse, triangle, quadrangle or polygon; The tip of electrode can be taper shape, elliptic cone, triangular pyramid, rectangular pyramid shape or polygonal pyramid shape.
10. burner nozzle according to any one of claim 1 to 9, is characterized in that, described N >=M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310520201.XA CN104566378B (en) | 2013-10-29 | 2013-10-29 | Burner nozzle based on electric arc discharge plasma |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310520201.XA CN104566378B (en) | 2013-10-29 | 2013-10-29 | Burner nozzle based on electric arc discharge plasma |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104566378A true CN104566378A (en) | 2015-04-29 |
| CN104566378B CN104566378B (en) | 2017-02-08 |
Family
ID=53083075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310520201.XA Active CN104566378B (en) | 2013-10-29 | 2013-10-29 | Burner nozzle based on electric arc discharge plasma |
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| Country | Link |
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| CN (1) | CN104566378B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138824A (en) * | 2017-06-09 | 2017-09-08 | 宁波舜宇仪器有限公司 | Discharging unit and welder and welding method containing the discharging unit |
| CN110542115A (en) * | 2018-05-28 | 2019-12-06 | 美的集团股份有限公司 | Combustion-supporting device and combustor |
| CN112556444A (en) * | 2020-12-31 | 2021-03-26 | 唐山燕山钢铁有限公司 | System for use blast furnace gas and natural gas co-combustion foaming ceramic or brick that permeates water |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2757499B1 (en) * | 1996-12-24 | 2001-09-14 | Etievant Claude | HYDROGEN GENERATOR |
| RU2278328C1 (en) * | 2005-05-13 | 2006-06-20 | Ооо "Плазариум" | Burner |
| US8742282B2 (en) * | 2007-04-16 | 2014-06-03 | General Electric Company | Ablative plasma gun |
| CN201652348U (en) * | 2010-04-07 | 2010-11-24 | 中国石油化工集团公司 | Plasma burner |
| CN102625557A (en) * | 2012-03-30 | 2012-08-01 | 大连理工大学 | Generating device for atmospheric bare electrode cold plasma jet |
| CN102721081B (en) * | 2012-06-26 | 2014-06-25 | 哈尔滨工程大学 | Nozzle for enhancing atomization by plasma |
-
2013
- 2013-10-29 CN CN201310520201.XA patent/CN104566378B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138824A (en) * | 2017-06-09 | 2017-09-08 | 宁波舜宇仪器有限公司 | Discharging unit and welder and welding method containing the discharging unit |
| CN110542115A (en) * | 2018-05-28 | 2019-12-06 | 美的集团股份有限公司 | Combustion-supporting device and combustor |
| CN112556444A (en) * | 2020-12-31 | 2021-03-26 | 唐山燕山钢铁有限公司 | System for use blast furnace gas and natural gas co-combustion foaming ceramic or brick that permeates water |
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| Publication number | Publication date |
|---|---|
| CN104566378B (en) | 2017-02-08 |
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