CN100591189C - Alternating-current plasma gun and its fire-lighting device - Google Patents
Alternating-current plasma gun and its fire-lighting device Download PDFInfo
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- CN100591189C CN100591189C CN200710304411A CN200710304411A CN100591189C CN 100591189 C CN100591189 C CN 100591189C CN 200710304411 A CN200710304411 A CN 200710304411A CN 200710304411 A CN200710304411 A CN 200710304411A CN 100591189 C CN100591189 C CN 100591189C
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Abstract
The invention provides an AC plasma gun as well as relevant ignition apparatus. The AC plasma gun comprises a first tubular electrode, a second tubular electrode, an insulating collar and an intake collar; wherein, one end of the first tubular electrode is sealed; the first tubular electrode is connected with a phase line in a power source for the high-frequency arc striking apparatus; outside ofthe first tubular electrode is provided with a magnetic control coil; the second tubular electrode is linked to the zero line on the power source; the output end of the second tubular electrode is composed of a nozzle; the insulating collar is linked to the first tubular electrode and the second tubular electrode, so that the two electrodes can be insulated against each other; the intake collar isarranged on the first tubular electrode or the second tubular electrode or the insulating collar; the intake collar is composed of an intake hole that is opened in the tangent direction. The ignitionapparatus comprises a plurality of plasma guns. The AC plasma gun as well as the relevant ignition apparatus needs no rectification power source, but has the advantages of high power, long life and perfect stability and so on.
Description
Technical field
The present invention relates to a kind of directly the power supply and be used for the AC plasma rifle of coal fired boiler igniting, and, belong to the power technology field by the non-oil ignition device that this AC plasma rifle is constituted by AC power.
Background technology
Oil is the basis of the national economic development, in the Energy Mix of China, occupy an important strategic position, develop rapidly along with Chinese national economy, demand to oil sharply increases, make about 40% in the China's oil consumption depend on import, the Oil Safety problem causes the great attention of country, and economizing on oil becomes one of major tasks of China's energy policy.
Power industry is the consumption of petroleum rich and influential family, wherein be used for opening, stop and low-load combustion-stabilizing of thermal power plant unit greatly, therefore using fuel-saving technique carries out opening, stop and low-load combustion-stabilizing of boiler unit, optimize the energy consumption structure of China, national economy sustainable development is had the important strategic meaning.
After 2000, China is domestic successfully to be applied in the direct current plasma firing technique on the boiler.So-called direct current plasma firing technique is with direct current striking under the condition of certain medium air pressure, and under high-intensity magnetic field control, obtain the directed flow air plasma of firm power, this plasma forms the great localized hyperthermia of the gradient fire nuclear of T＞4000K in start-up burner, when pulverized coal particle passes through this plasma " fire nuclear ", discharge volatile matter rapidly, reproduce fugitive constituent, and make the pulverized coal particle pulverizing of breaking, thereby burning rapidly reaching the purpose of the acceleration coal dust firing of a little fighting.This technology receives much concern because of having realized non-oil ignition system.
What mainly adopt in China at present, is hot cathode direct current plasma firing technique with big electrical current heat electronics radiation pattern.But this direct current plasma firing technique is subjected to its technical limitations, exists problems.This technology is when work, and electric current increases with power is big more.Therefore, the power of this technology generally can only reach about 150KW.And the cathode life of this technology generally is no more than 50 hours.Its electrode need be made by noble metal, and cost and operating cost are all higher.The direct current plasma firing technique need dispose rectification power system, the cost height, and occupation of land is many.And this technology can only be lighted the bituminous coal of Vdif 〉=20%, and suitable coal is limited.
Realize that the AC plasma ignition system is still unmanned at home and abroad and use and directly power by alternating current.In view of the deficiency in the above-mentioned existing Plasma Firing Technology, the present invention has designed a kind of directly by the cold electrode low current AC plasma firing technique of AC-powered, can overcome the deficiency of existing direct current plasma firing technique.
Summary of the invention
Goal of the invention of the present invention is to solve deficiency of the prior art, provides a kind of directly the power supply by AC power to be used for the AC plasma rifle of coal fired boiler igniting.And, the non-oil ignition device that is constituted by this AC plasma rifle.
Goal of the invention of the present invention is achieved by following technical proposals:
The AC plasma rifle is characterized in that: comprise first hollow edged electrode, second hollow edged electrode, dead ring, air inlet ring;
The one end sealing of described first hollow edged electrode; This first hollow edged electrode links to each other with phase line of power by the high-frequency arc strike device; Be wound with the magnetic control coil in this first hollow edged electrode outside;
Described second hollow edged electrode links to each other with the zero line of power supply; Output at this second hollow edged electrode is provided with nozzle;
Described dead ring connects described first hollow edged electrode and second hollow edged electrode, makes two electrode insulations;
Described air inlet ring is arranged on described first hollow edged electrode or second hollow edged electrode or the dead ring, offers air admission hole in this air inlet ring upper edge tangential direction.
The tube wall of described first hollow edged electrode and second hollow edged electrode is a sandwich, water-filling in this sandwich; Described sandwich is connected with water inlet, delivery port.
Described high-frequency arc strike device front end is connected with current limiting reactor; Described air admission hole links to each other with air inlet pipe; On this air inlet pipe, be provided with the air inlet pressure regulating valve.
The AC plasma igniter is characterized in that: comprise three AC plasma rifle and mixing chambers that structure is identical;
Described AC plasma rifle comprises first hollow edged electrode, second hollow edged electrode, dead ring, air inlet ring; The one end sealing of described first hollow edged electrode; This first hollow edged electrode links to each other with phase line of power by the high-frequency arc strike device; Be wound with the magnetic control coil in this first hollow edged electrode outside; Described second hollow edged electrode links to each other with the zero line of power supply; Output at this second hollow edged electrode is provided with nozzle; Described dead ring connects described first hollow edged electrode and second hollow edged electrode, makes two electrode insulations; Described air inlet ring is arranged on described first hollow edged electrode or second hollow edged electrode or the dead ring, offers air admission hole in this air inlet ring upper edge tangential direction.
The nozzle of described three AC plasma rifles all is connected to described mixing chamber.
Described high-frequency arc strike device front end is connected with current limiting reactor.
At described magnetic control coil tandem between described high-frequency arc strike device and current limiting reactor; The magnetic control coil that is connected with the first AC plasma rifle is set around on the second AC plasma rifle; The magnetic control coil that is connected with the second AC plasma rifle is set around on the 3rd AC plasma rifle; The magnetic control coil that is connected with the 3rd AC plasma rifle is set around on the first AC plasma rifle.
Described mixing chamber is end sealing, the room structure of an end opening.
Hollow structure for both ends open.
Also be provided with three multiple and the identical AC plasma rifle of described AC plasma rifle structure.
The invention has the beneficial effects as follows:
1, the AC plasma rifle elongates electric arc by revolving gas, realizes the powerful input of little electric current, and this is the decisive assurance of the long-lived operation of plasma torch;
2, the AC plasma rifle has been avoided electrode Yin Gaowen and scaling loss by structural approachs such as turn electric arc arc root, elongation electric arc, introducing water-cooling systems, has guaranteed the useful life of plasma torch;
Energy ignite in wink when 3, the AC plasma rifle made the plasma-arc that is produced be subjected to the disturbance blow-out by the high-frequency arc strike device, thereby had guaranteed the stability of the electric arc that produces;
4, the AC plasma igniter is constituted by three or a multiple AC plasma rifle of three, has guaranteed that the load of AC plasma rifle disturbs the imbalance of power supply;
5, AC plasma igniter of the present invention is directly used AC power, need not to add in addition rectifier power source equipment, can realize non-oil ignition system, reduces investment outlay, and saves operating cost.
Description of drawings
Fig. 1 is an AC plasma rifle structure chart;
Fig. 2 is AC plasma ignition device structure figure;
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is an AC plasma rifle structure chart of the present invention.As shown in the figure, this AC plasma rifle comprises two hollow edged electrodes, dead ring 3 and air inlet ring 5.Two hollow edged electrodes are the electrode in a tubular form that is made of metal, and are called first hollow edged electrode 1 and second hollow edged electrode 2.
The one end sealing of first hollow edged electrode 1.(civil power adopts the three-phase four-wire power supply mode to this electrode usually, promptly comprises: A, B, three phase lines of C and a zero line by a phase line in high-frequency arc strike device 11 and the AC power.) link to each other.High-frequency arc strike device 11 is converted to high-frequency high-voltage signal for being a main high-frequency generator that constitutes with the step-up transformer in order to the low frequency signal with its input.Because this apparatus structure is a technology known in those skilled in the art, just no longer be further described at this.Be wound with magnetic control coil 12 in first hollow edged electrode, 1 outside.
Second hollow edged electrode 2 links to each other with the zero line of power supply.Output at second hollow edged electrode 2 is provided with nozzle 21.
Dead ring 3 is a sleeve pipe of being made by insulating material.This dead ring 3 is in order to connecting first hollow edged electrode 1 and second hollow edged electrode 2, insulate between two electrodes keeping.Should be pointed out that dead ring 3 mainly plays here fixes first hollow edged electrode 1 and second hollow edged electrode 2, keeps the effect of insulating between two electrodes.Position and structure that this dead ring 3 is concrete should not be subjected to the restriction of example shown in Figure 1.
As shown in Figure 1, air inlet ring 5 is housed on dead ring 3, and offers air admission hole 51 in these air inlet ring 5 upper edge tangential direction.Treat that ionizing air tangentially enters the AC plasma rifle by this air admission hole 51, and move along the rifle spiral inner wall.
As previously mentioned, be hot cathode direct current plasma firing technique in the Plasma Firing Technology that China adopted at present, this technology is with big electrical current heat electronics radiation pattern.This sparking mode is when high power work, and electrode is excessive easily by scaling loss because of operating current.The structure of the AC plasma rifle of the invention described above just be based on address this problem designed.
On air inlet ring 5, offer air admission hole 51 among the present invention.Treat that ionizing air tangentially enters the AC plasma rifle by this air admission hole 51, and move along the rifle spiral inner wall.Can fully elongate air-flow by this method through the formed arc length of ionization.Because the characteristic of electric arc is that arc voltage increases with arc length.Under equal power condition, because therefore the length that plasma torch of the present invention fully elongates electric arc can carry out work with lower electric current, thereby alleviate the scaling loss of electrode greatly.
In addition, designed here air inlet ring 5 is independent parts, but not integrally formed with dead ring 3.Can realize regulating the size of air admission hole 51 and the purpose of angle easily by changing air inlet ring 5 like this.And should be pointed out that described air inlet ring 5 set positions are not limited on the dead ring 3.Simultaneously, also can be arranged on the tube wall of first hollow edged electrode 1 or second hollow edged electrode 2.
The present invention is at the magnetic control coil 12 in first hollow edged electrode, 1 outside.These magnetic control coil 12 incoming transport electricity, and have phase angle difference between the alternating current that inserted of the alternating current that it inserted and high-frequency arc strike device 11.By such design, make of the tube wall high speed turn of the arc root of first hollow edged electrode, 1 end electric arc along first hollow edged electrode 1, the arc root that can avoid electric arc is because of being in a fixed position the scaling loss of accelerating electrode.
In addition, the present invention has also designed water-cooling system for plasma torch for further alleviating the scaling loss that electrode Yin Gaowen causes.As shown in Figure 1, the tube wall of described first hollow edged electrode 1 and second hollow edged electrode 2 is a sandwich, water-filling in it.This sandwich also is connected with a water inlet and a delivery port respectively, forms water-cooling system.Can take away the high heat energy that electric arc adds to electrode by this water-cooling system, further reduce the possibility of electrode Yin Gaowen scaling loss.
The AC plasma firing technique is owing to adopt alternating current to do power supply, and interelectrode voltage is in real-time change.This makes that adopting the formed electric arc of AC plasma firing technique to be subject to disturbance extinguishes the less stable of flame.For addressing this problem, the present invention is serially connected with high-frequency arc strike device 11 at first hollow edged electrode, 1 end.Produce the high-frequency spark tracking by high-frequency arc strike device 11 and light the electric arc that extinguishes, keep electric arc surely to fire.
Controlled in order to realize AC plasma rifle power output, enthalpy, can also be provided with current limiting reactor 13 at high-frequency arc strike device 11 front ends, with air inlet pipe that air inlet ring 5 links to each other on be provided with the air inlet pressure regulating valve.By regulating current limiting reactor 13, can control arc current; Can control charge flow rate by regulating the air inlet pressure regulating valve, thereby reach the purpose of coupling regulation and control plasma torch power, enthalpy.
The above-mentioned AC plasma rifle structure that provides is a monomer plasma torch that phase line realized that utilizes in the three-phase four-wire system power supply.But because the isolated operation of high-power single-phase plasma torch easily causes the imbalance of electrical network.Therefore, for guaranteeing in the electrical network balance between each phase line, need on three phase lines, be provided with plasma torch usually.Below, be example promptly with the AC plasma igniter that combines by three plasma torchs, introduce the igniter of using AC plasma rifle of the present invention.
As shown in Figure 2, the AC plasma igniter is made of the monomer AC plasma rifle of A rifle 41a, B rifle 41b, three of C rifle 41c as above-mentioned structure shown in Figure 1.A rifle 41a, B rifle 41b, C rifle 41c are powered by three phase lines of A, B, C of three-phase four-wire system power supply respectively.The nozzle of A rifle 41a, B rifle 41b, C rifle 41c all is connected to a mixing chamber 42, will be mixed in mixing chamber 42 by the high temperature torch that A rifle 41a, B rifle 41b, C rifle 41c produce respectively, thereby the unsteadiness that reduces monomer plasma torch torch influences.
In addition, the present invention also is serially connected with magnetic control coil 12 on the power supply circuits of adjacent plasma torch for the flame that further balance A rifle 41a, B rifle 41b, C rifle 41c are produced.As shown in Figure 2, magnetic control coil 12 is series between the current limiting reactor 13 and high-frequency arc strike device 11 of adjacent plasma torch, thereby makes the plasma torch of 12 windings of this magnetic control coil be subjected to the influence of adjacent phase line.For example, the embodiment shown in Fig. 2, the syndeton of this plasma ignition device is the magnetic control coil 12a that links to each other with the A phase line and is around on the C rifle 41c; The magnetic control coil 12b that links to each other with the B phase line is around on the A rifle 41a; The magnetic control coil 12c that links to each other with the C phase line is around on the B rifle 41b.But should point out that protection scope of the present invention should not only limit to the syndeton shown in the foregoing description.Each phase line is by the electric current of coupled magnetic control coil influences electric arc that adjacent plasma torch produces, and forms complementary relationship, the power of balanced each plasma torch output torch thereby make between three plasma torchs of plasma ignition device.
Described mixing chamber 42 is for mixing the room structure of each AC plasma rifle torch.The concrete shape of this mixing chamber 42 is different according to the employed environmental aspect of igniter with structure, also changes thereupon.When igniter during as burner independently, this mixing chamber 42 is end sealing, the room structure of an end opening, and this opening is the bocca of igniter.When igniter combined burning things which may cause a fire disaster as firing coal-dust with the coal dust passage, then this mixing chamber 42 should be the hollow structure of both ends open.And this mixing chamber 42 can be designed to shapes such as cylinder taper, cylindroid taper, the taper of square post according to the field conditions of different coals and boiler-burner.
Be noted that the AC plasma igniter of above-mentioned illustrated embodiment for being constituted by three monomer plasma torchs.This apparatus structure is according to comprising three typical structures that phase line is designed in the civil power.But when reality was used, the quantity of regulating the monomer plasma torch according to actual needs was that three or a multiple monomer plasma torch of three all should be considered as within protection scope of the present invention.
Claims (6)
1, AC plasma rifle is characterized in that: comprise first hollow edged electrode, second hollow edged electrode, dead ring, air inlet ring;
The one end sealing of described first hollow edged electrode; This first hollow edged electrode links to each other with the phase line of AC power by the high-frequency arc strike device; Be wound with the magnetic control coil in this first hollow edged electrode outside; Described magnetic control coil incoming transport electricity, and have phase difference between the alternating current that inserted of the alternating current that it inserted and high-frequency arc strike device;
Described second hollow edged electrode links to each other with the zero line of power supply; Output at this second hollow edged electrode is provided with nozzle;
Described dead ring connects described first hollow edged electrode and second hollow edged electrode, makes two electrode insulations;
Described air inlet ring is arranged on described first hollow edged electrode or second hollow edged electrode or the dead ring, offers air admission hole in this air inlet ring upper edge tangential direction.
2, AC plasma rifle as claimed in claim 1 is characterized in that: the tube wall of described first hollow edged electrode and second hollow edged electrode is a sandwich, water-filling in this sandwich; Described sandwich is connected with water inlet, delivery port.
3, AC plasma rifle as claimed in claim 1 is characterized in that: described high-frequency arc strike device induction coil front end is connected with current limiting reactor; Described air admission hole links to each other with air inlet pipe; On this air inlet pipe, be provided with the air inlet pressure regulating valve.
4, AC plasma igniter is characterized in that: comprise three AC plasma rifle and mixing chambers that structure is identical;
Described AC plasma rifle comprises first hollow edged electrode, second hollow edged electrode, dead ring, air inlet ring; The one end sealing of described first hollow edged electrode; This first hollow edged electrode links to each other with phase line of power by the high-frequency arc strike device; Be wound with the magnetic control coil in this first hollow edged electrode outside; Described second hollow edged electrode links to each other with the zero line of power supply; Output at this second hollow edged electrode is provided with nozzle; Described dead ring connects described first hollow edged electrode and second hollow edged electrode, makes two electrode insulations; Described air inlet ring is arranged on described first hollow edged electrode or second hollow edged electrode or the dead ring, offers air admission hole in this air inlet ring upper edge tangential direction;
Described high-frequency arc strike device front end is connected with current limiting reactor; Described magnetic control coil tandem is between described high-frequency arc strike device and current limiting reactor; The magnetic control coil that is connected with the first AC plasma rifle is set around on the second AC plasma rifle; The magnetic control coil that is connected with the second AC plasma rifle is set around on the 3rd AC plasma rifle; The magnetic control coil that is connected with the 3rd AC plasma rifle is set around on the first AC plasma rifle;
The nozzle of described three AC plasma rifles all is connected to described mixing chamber.
5, AC plasma igniter as claimed in claim 4 is characterized in that: described mixing chamber is end sealing, the room structure of an end opening.
6, AC plasma igniter as claimed in claim 4 is characterized in that: described mixing chamber is the hollow structure of both ends open.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710304411A CN100591189C (en) | 2007-12-27 | 2007-12-27 | Alternating-current plasma gun and its fire-lighting device |
| PCT/CN2008/073545 WO2009092234A1 (en) | 2007-12-27 | 2008-12-17 | An ac plasma ejection gun and its power supply method and a pulverized coal burner |
| US12/824,953 US8783196B2 (en) | 2007-12-27 | 2010-06-28 | AC plasma ejection gun, the method for supplying power to it and pulverized coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710304411A CN100591189C (en) | 2007-12-27 | 2007-12-27 | Alternating-current plasma gun and its fire-lighting device |
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| CN101216183A CN101216183A (en) | 2008-07-09 |
| CN100591189C true CN100591189C (en) | 2010-02-17 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092234A1 (en) * | 2007-12-27 | 2009-07-30 | Beijing Guangyao Electricity Equipment Co., Ltd | An ac plasma ejection gun and its power supply method and a pulverized coal burner |
| CN101636034B (en) * | 2008-07-24 | 2013-06-05 | 北京光耀能源技术股份有限公司 | Device and method for AC uninterrupted arc power supply |
| CN102271452A (en) * | 2010-06-03 | 2011-12-07 | 成都阳流科技发展有限公司 | Thermal plasma arc flame generator |
| KR101249457B1 (en) * | 2012-05-07 | 2013-04-03 | 지에스플라텍 주식회사 | Plasma torch of non-transferred and hollow type |
| CN102933017B (en) * | 2012-11-05 | 2015-03-04 | 航天环境工程有限公司 | Built-in spark plug type alternating current plasma generator |
| CN103079329B (en) * | 2012-12-26 | 2016-08-10 | 中国航天空气动力技术研究院 | A kind of high-pressure plasma ignition device |
| JP2014170743A (en) * | 2013-03-04 | 2014-09-18 | Gs Platech Co Ltd | Non-transferred and hollow type plasma torch |
| CN104713141A (en) * | 2015-03-17 | 2015-06-17 | 卢驭龙 | Plasma torch device and plasma oven employing same |
| CN106196165A (en) * | 2016-08-25 | 2016-12-07 | 江苏大唐国际吕四港发电有限责任公司 | Plasma ignition system and control method and applicable ultra-supercritical boiler |
| CN108566715B (en) * | 2018-04-11 | 2020-12-18 | 航天神洁(北京)科技发展有限公司 | Plasma gun for preparing acetylene from coal |
| CN110173718A (en) * | 2019-06-05 | 2019-08-27 | 大唐长春第二热电有限责任公司 | Boiler startup non-oil ignition system based on middle storage formula thermal power generation unit |
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2007
- 2007-12-27 CN CN200710304411A patent/CN100591189C/en active Active
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