CN1230660A - Emitting gun for plasma ignitor - Google Patents
Emitting gun for plasma ignitor Download PDFInfo
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- CN1230660A CN1230660A CN 98100982 CN98100982A CN1230660A CN 1230660 A CN1230660 A CN 1230660A CN 98100982 CN98100982 CN 98100982 CN 98100982 A CN98100982 A CN 98100982A CN 1230660 A CN1230660 A CN 1230660A
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- electrode
- ignition device
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- plasma ignition
- ejecting gun
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Abstract
In the emitting gun for plasma ignition device, the air intake pipe in the casing is communicated with the air intake hole in conducting pipe and the cooling hole at tend; the electrode is connected to conducting installation base; the conducting pipe, conducting washer and bare wire are connected successively and installed inside the casing with insulating material being filled in between; the conducting pipe is connected to the installation base in front, the casing end to the locking joint, and the bare wire through the locking joint to the power source. The developed emitting gun can emit large amount of electrons relably in high temperature and high pressure environment to ignite lean coal directly and assist the stable burning of duff boiler.
Description
The invention discloses a kind of ejecting gun that is used on the plasma ignition device, it is suitable for being used in the big capacity electronics of emission under the high temperature and high pressure environment, is particularly suitable for being used on the plasma ignition device of directly lighting generating plant pulverized coal boiler.
At present; what the home and abroad station boiler adopted all is fuel ignitions; annual station boiler igniting will be burnt a large amount of fuel oils; with China's station boiler is example; annual only ignition of the boiler just needs about 150～1,800,000 tons fuel oil; amount to about 45～5,400,000,000 yuan RMB; station boiler required fuel oil in the whole world will be an immeasurable numeral; in the face of global energy crisis; particularly, press for igniting, the combustion-supporting and oily problem of low-load combustion-stabilizing that a kind of unconventional igniter of invention solves pulverized-coal fired boiler in the face of the so oil-poor big country of China.
Late nineteen seventies, the Tsing-Hua University of the U.S., the former Soviet Union, Australia and China begins one's study and adopts the problem of the direct firing coal-dust of plasma technology, the eighties, continuous mutually having finished of the U.S., Canada, the former Soviet Union adopted the laboratory and the type approval test of the direct firing coal-dust of plasma technology, but all do not develop the ejecting gun that an anti-high voltage of complete high temperature resistance also can be launched big capacity electronics.Wherein, the former Soviet Union is used for the emitter on the plasma ignition device, is made up of cable, negative electrode graphite electrode, electrode feed arrangement, cooler.At the bottom of nineteen ninety-five, it directly lights Tongchuan meager coal in China Baoji power plant, three hours 08 minutes have only normally been moved, just find that it can not work reliably under high temperature and high pressure environment, there is coring in graphite electrode, falls slag in combustion process, cause voltage, electric current unstable even short circuit occurs, the insulating barrier (cooler) that adopts bakelite to make is at high temperature for several times breakdown, the electrode feeding mode of charged transmission problem such as be absolutely unsafe.
Fail to develop a kind of plasma ejecting gun that can also can directly light colm at the medium-term and long-term steady operation of high temperature and high pressure environment, influenced plasma ignition device promoting the use on station boiler.
The purpose of this invention is to provide a kind of ejecting gun that is used on the plasma ignition device, it is the big capacity electronics of emission in high temperature and high pressure environment stably in a long term, directly lights meager coal, and can assist pulverized-coal fired boiler smooth combustion.
The object of the present invention is achieved like this: a kind of ejecting gun that is used on the plasma ignition device, it has electrode, the conductive mounting seat, contact tube, conductive spacer, insulating materials, housing, naked lead, anti-loose joint, blast pipe is housed on the housing, have air admission hole on the contact tube, have the cooling through hole on the conductive mounting seat or in the electrode, blast pipe and air admission hole, the cooling through hole communicates, electrode connects the conductive mounting seat, contact tube, conductive spacer, naked lead connects in proper order and is installed in the housing, between fill insulant, termination conductive mounting seat before the contact tube, shell end is taken over control loose joint, naked lead passes anti-loose joint and connects power supply, can also be all to have the cooling through hole in conductive mounting seat and the electrode;
Wherein, contact tube is a copper tube, to be filled in insulating materials between contact tube and the housing be one group of high alumina insulating ceramics pipe or the sintering high alumina insulating ceramics pipe of high-temperature glaze;
Wherein, the electrode material is hafnium or zirconium or silicon molybdenum, and electrode is fixed on and constitutes combined electrode in the conductive sleeve, and electrode is the dismantled and assembled electrode that is fixed on the conductive mounting seat;
Wherein, the insulating materials that is packed between conductive spacer, naked lead and the housing is the high-temperature resistant rubber insulating bushing,
Wherein, anti-loose joint is made up of exterior nut cap, joint, backing plate, spring, spring places between joint and the backing plate, locking spring clip is being fixed in the exterior nut cap termination, joint one end passes the exterior nut cap other end and withstands on the backing plate that pushes high alumina insulating ceramics pipe, and shell end has screw thread, and there is a circle tooth form groove screw thread lower end and locking spring clip corresponding position, naked lead passes joint, backing plate, high alumina insulating ceramics pipe, connects back contact.
Advantage of the present invention is:
Because ejecting gun of the present invention insulation material is trembled the employing high alumina ceramic, and sintering high-temperature glaze, make that the overall emission rifle at high temperature can be not breakdown; Solved the former Soviet Union and adopted the bakelite insulation, at high temperature for several times breakdown problem;
Because electrode used therein of the present invention has adopted the little sacrificial electrode with cellular cooling through hole, material selection zirconium or hafnium or silicon molybdenum, make the air that is used for carrier pass the cooling through hole in the electrode, and/or pass cooling through hole on the conductive mounting seat, after electrode cooled off, be dissociated into plasma by big electric current; Having solved graphite electrode itself, oxidation to occur soft, coring in combustion process, falls slag, causes voltage, electric current is unstable even problem of short-circuit occurs;
The electrode easy accessibility is easy to change;
The ejecting gun conductive path adopts contact tube, conductive sleeve that 200～600 Ampere currents are delivered to electrode ignition end from fairing, and when forming high temperature (4000～5000 ℃) electric arc with extraneous anode, cold wind by blast pipe cools off whole conductive path also through air admission hole, tube core, cooling through hole; Solve the former Soviet Union and adopted air-cooled electrode outer surface, the problem of accelerating electrode oxidation at high temperature;
Owing to adopted sealed high pressure prevent loose joint, it is little to have a contact resistance, and anti-high voltage capability is strong, the locking spring clip of fixing on the exterior nut cap, and after being rotated in place, clamp falls in the tooth form groove just, has played fabulous locking effect; Solved the general nipple of former soviet design, the out of use problem of repeatedly becoming flexible in the course of the work, leak, leak gas.
Because the present invention has developed a complete plasma ejecting gun, can promote the utilization of plasma ignition device quickly, to replace traditional fuel ignition, thereby can save great amount of fuel oil every year, has huge energy-saving and cost-reducing effect, can be country and bring distinct economic and social benefit, the energy policy that meets planning commission of People's Republic of China (PRC) chapter 8 " replace oil with coal " in " 97 white paper ", and ejecting gun is simple in structure, design is unique, cheap, be particularly suitable for China's actual conditions and use.
Fig. 1 is a plasma ejecting gun structural representation of the present invention;
The present invention is further illustrated in conjunction with the accompanying drawings below by embodiment:
Embodiment 1:
As shown in Figure 1, a kind of ejecting gun that is used on the plasma ignition device, it has electrode 1, conductive sleeve 2, conductive mounting seat 3, fixed sleeve 4, contact tube 5, contact point, lead 14, anti-loose joint 15, ceramic insulating tube 8, pad 6, insulating bushing 11, housing 7, blast pipe 10;
Electrode 1 is fixed on and makes combined electrode (conductive sleeve 2 employing high conductive materials in the conductive sleeve 2, as: copper pipe) electrode 1 is selected materials such as refractory metal hafnium, zirconium, silicon molybdenum for use, garden cylindrical electrode 1 internal condition air mass flow size, be drilled with several cooling through holes 20, also have cooling through hole 20 on the conductive mounting seat 3, (or on conductive mounting seat 3, have the cooling through hole, be not drilled with cellular cooling through hole in the electrode; Or be drilled with cellular through hole in the electrode, and do not open the cooling through hole on the conductive mounting seat 3) guarantee that electrode 1 in the course of the work can be sufficiently cooled;
Contact tube 5 is copper tubes, has cold wind air admission hole 19 on it, and blast pipe 10 is housed on the housing 7, and blast pipe 10 can be welded on the housing 7; Cold wind enters the conduction tube core from blast pipe 10 through air admission hole 19, discharges from cooling through hole 20, and whole rifle body conductive path is cooled off;
Combined electrode is fixed on the conductive mounting seat 3 by screw (or other dismantled and assembled fixing modes), conductive mounting seat 3 is screw or thread connection with fixed sleeve 4, contact tube 5 places in the housing 7, one end is welded on the fixed sleeve 4, before another termination contact point 9 through conductive spacer 18 with after contact point 16 UNICOMs, naked lead 14 is welded on the contact point 16 of back, is locked by anti-loose joint 15;
Clog high-temperature insulation material between electric conductor that contact tube 5, conductive spacer 18, naked lead 14 form after connecting well in order and the housing 7, high-temperature insulation material is a sintering, and the annular high alumina ceramic insulation tube 8 of high-temperature glaze (guarantees that this rifle is as under 800 ℃ of high temperature, anti-electricity is not less than 3000 volts), one group of ceramic insulating tube 8 is nested each other, but gap location shimming 6 is fixing, guarantee that housing 7 is not charged, the insulant that is filled between conductive spacer 18, naked lead 14 and the housing 7 also can be an electro-insulating rubber lining 11;
Housing 7 ends have screw thread, and there is a circle tooth form groove screw thread lower end and locking spring clip 17 corresponding positions,
To prevent that loose joint 15 is installed to housing 7 ends, when screwing exterior nut cap 12, joint 13 presses closer backing plate 21, and then extruding high alumina ceramic insulation tube 8, the front and back contact point is compressed and closely contacts, whole conductive path is connected with contact tube 5, screw put in place after, the locking spring clip 17 of housing 7 ends fixes in the tooth form groove of housing 7 ends just, can not become flexible.
Working method of the present invention and principle are:
The big electric current that lead on the ejecting gun of the present invention comes fairing (as: 200～600 peace), through preceding contact point 9, conductive spacer 18, after conductive sleeve 2 on the contact point 16, contact tube 5, conductive mounting seat 3, electrode 1 deliver to electrode and get angry end, and between electrode and jet pipe (anode) high voltage in addition, form electric arc.Air is become plasma, thereby finish ignition operation.The high alumina ceramic pipe that has transmitted between the negative electrode contact tube of electric current and the anode casing with sintering high-temperature glaze is adopted and is insulated, in galvanization, be used for entering extraneous anode nozzle after by blast pipe 10, air admission hole 19, contact tube 5, cooling 20 pairs of contact tubes of through hole and electrode cooling and become plasma as the cold air of plasma carrier.
Claims (8)
1. ejecting gun that is used on the plasma ignition device, it is characterized in that: it has electrode (1), conductive mounting seat (3), contact tube (5), conductive spacer (18), insulating materials (8), housing (7), naked lead (14), anti-loose joint (15), blast pipe (10) is housed on the housing (7), have air admission hole (19) on the contact tube (5), have cooling through hole (20) on the conductive mounting seat (3) or in the electrode (1), blast pipe (10) and air admission hole (19), cooling through hole (20) communicates, electrode (1) connects conductive mounting seat (3), contact tube (5), conductive spacer (18), naked lead (14) order connects and is installed in the housing (7), between fill insulant (8), contact tube (5) preceding termination conductive mounting seat (3), housing (7) end is taken over control loose joint (15), and naked lead (14) passes anti-loose joint (15) and connect power supply.
2. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 1 is characterized in that: all have cooling through hole (20) on the conductive mounting seat (3) and in the electrode (1).
3. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 1 or 2 is characterized in that: to be filled in insulating materials (8) between contact tube (5) and the housing (7) be one group of high alumina insulating ceramics pipe or the sintering high alumina insulating ceramics pipe of high-temperature glaze.
4. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 3 is characterized in that: contact tube (5) is a copper tube.
5. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 4 is characterized in that: electrode (1) is hafnium or zirconium or silicon molybdenum, and electrode (1) is fixed in the conductive sleeve (2).
6. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 5 is characterized in that: electrode (1) is the dismantled and assembled electroplax that is fixed on the conductive mounting seat (3).
7. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 6 is characterized in that: the insulating materials (8) that is packed between conductive spacer (18), naked lead (14) and the housing (7) is high-temperature resistant rubber insulating bushing (11).
8. a kind of ejecting gun that is used on the plasma ignition device as claimed in claim 7, it is characterized in that: anti-loose joint (15) is by exterior nut cap (12), joint (13), backing plate (21), spring (22) is formed, spring (22) places between joint (13) and the backing plate (21) exterior nut cap (12) termination fixing locking spring clip (17), joint (13) passes exterior nut cap (12) and withstands on the backing plate (21) that pushes high alumina insulating ceramics pipe, housing (7) end has screw thread, there is a circle tooth form groove screw thread lower end and locking spring clip (17) corresponding position, naked lead (14) passes joint (13), backing plate (21), high alumina insulating ceramics pipe (8) connects back contact (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98100982 CN1230660A (en) | 1998-03-31 | 1998-03-31 | Emitting gun for plasma ignitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98100982 CN1230660A (en) | 1998-03-31 | 1998-03-31 | Emitting gun for plasma ignitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1230660A true CN1230660A (en) | 1999-10-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98100982 Pending CN1230660A (en) | 1998-03-31 | 1998-03-31 | Emitting gun for plasma ignitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1230660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463764B (en) * | 2009-01-09 | 2010-09-08 | 哈尔滨工程大学 | High-energy plasma igniter of gas turbine |
-
1998
- 1998-03-31 CN CN 98100982 patent/CN1230660A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463764B (en) * | 2009-01-09 | 2010-09-08 | 哈尔滨工程大学 | High-energy plasma igniter of gas turbine |
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| WD01 | Invention patent application deemed withdrawn after publication |