CN102238795A - Technology for protecting arc plasma graphite electrode from antioxidant erosion loss by inert gas - Google Patents
Technology for protecting arc plasma graphite electrode from antioxidant erosion loss by inert gas Download PDFInfo
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- CN102238795A CN102238795A CN2010101581545A CN201010158154A CN102238795A CN 102238795 A CN102238795 A CN 102238795A CN 2010101581545 A CN2010101581545 A CN 2010101581545A CN 201010158154 A CN201010158154 A CN 201010158154A CN 102238795 A CN102238795 A CN 102238795A
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Abstract
The invention relates to a technology for protecting an arc plasma graphite electrode from antioxidant erosion loss by inert gas. According to a figure in an abstract, the center of a cylindrical conduction graphite electrode (1) is concentrically provided with an inert gas transmission channel (2); a high-pressure inert gas storage station (3) controls gas flow by a gas throttling control valve (4); and gas is transmitted to the graphite electrode (1) by a transmission pipeline (5), enters the transmission channel (2), flows out of a graphite electrode discharge end (6) and encircles the electrode discharge end positioned in an arc plasma area (7). The inert gas protects the electrode, reduces oxidant erosion loss of the electrode, serves as working gas of plasma, and reduces the starting voltage and the working voltage of the plasma. The technology belongs to the technical field of plasma generation, and can be widely applied to hazardous wastes treatment by the plasma, plasma smelting, silicon purification by the plasma and other industries.
Description
Technical field:
The present invention relates to the hot plasma generator.Specifically adopt the technology of inert gas shielding arc-plasma graphite electrode anit-oxidizing ablation loss.
Background technology:
Arc-plasma is to produce temperature to reach several thousand and spend to the hot plasma of ten thousand degree between two electrodes, and is comparatively general on commercial Application, disposes industries such as hazardous waste, plasma smelting and pecvd silicon purification as plasma.Arc-plasma adopts the high electrically conductive graphite material of fusing point to do electrode usually.Because the temperature of arc-plasma is spent degree up to ten thousand up to several thousand, the oxidation ablation loss of electrode be inevitably, can only take some measures technically and slow down oxidation ablation.Authorized on 06 04th, 2008 (patent No.: 00121396) health auxilliary, damp Tian Kangzhi in village's among Matsushita Electric Industrial Co., Ltd's invention designer, northern village is open-minded and " being used for producing the electrode of plasma, the plasma treatment of using the apparatus for processing plasma of this electrode and utilizing this equipment " patent of invention of the aboveground lucky people; a kind of safeguard measure of electrode is proposed; promptly " between electrode, apply pulse or AC voltage; so that near atmospheric pressure, produce the dielectric barrier discharge plasma of gas, thereby utilize plasma treatment to be placed on object between the electrode.At least one electrode have tubular structure electrode basement and expose to the open air to electrode basement etc. from least one lip-deep protective layer that forms by hot melt coated glass sill of body." core technology of this patent electrode protection is the glass-based material that electrode basement surface hot melt applies electric insulation.Its shortcoming is that the power supply that produces plasma can only be pulse or to the frequency size alternating current that has certain requirements, and can not use direct current, otherwise, run counter to principle of continuity of electric current.This produces the method for low temperature plasma often, plasma current is very little, belong to dielectric barrier discharge (DBD), the patent of invention (patent No. 02159260) of principle similar " atmospheric dielectric barrier discharge plasma gun " and the patent (patent No. 200810046794) of " device for medium to block discharging plasma body jet current ".Because the discharge that has dielectric to stop must have higher frequency and voltage, could guarantee bigger dielectric current.Do not see at present the report that produces big electrical current heat plasma with the dielectric impedance method.Authorized (the patent No.: 200320122028) prince unit on December 08th, 2004; Zhao Chuanjun; King's " waste disposal plasma furnace " utility model patent of people such as behave has been introduced a kind of hot plasma stove that is used for disposal of wastes, and its plasma technique is that industries such as present arc smelting, plasma waste disposal generally adopt." a kind of nonequilibrium plasma production method and the generation device " on October 18th, 2006 open (publication number 1849032) introduced the method that a kind of three-phase alternating current produces plasma.But the content that does not all relate to this fermentation patent.
Summary of the invention:
The present invention is for above-mentioned the deficiencies in the prior art part, and a kind of technology that reduces the loss of arc-plasma graphite electrode oxidation ablation is provided, and improves the useful life that arc heat plasma graphite electrode is worked under aerobic environment.
Technical solution problem of the present invention adopts following technical scheme.
The technical characterstic of inert gas shielding arc-plasma graphite electrode anit-oxidizing ablation loss of the present invention is: the concentric circle holes passage is opened at cylindrical conductive graphite electrode center, is used to carry inert gas.The size of circular hole passage is determined by required inert gas flow.The cross-sectional sizes of graphite electrode is determined by needed operating current.The high-pressure inert gas gasholder station is controlled through gas throttling valve, links to each other with the circular hole passage with gas pipeline.Constitute the landline of inert gas.Inert gas flows out along landline from the graphite electrode discharge end, surrounds the electrode discharge end that is in the arc plasma tagma.Inert gas is guard electrode not only, weakens the oxidation ablation loss of electrode, and as the working gas of plasma, reduces the starting resistor and the operating voltage of plasma.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, inert gas shielding electrode reduces the cigarette ash vitrification ablation loss of hot plasma graphite electrode.Simultaneously, can reduce the starting resistor and the stable operating voltage of plasma.
2, the invention belongs to plasma generation technique field, can be widely used in plasma and dispose industries such as hazardous waste, plasma smelting and pecvd silicon purification.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
In the figure grade: 1 graphite electrode, 2 gas distribution channels, 3 gas gasholder stations, 4 throttling control valves, 5 gas pipelines, 6 graphite electrode discharge ends, 7 arc plasma tagmas
Embodiment:
Referring to Fig. 1, graphite plasma electrode 1 is cylindrical in the present embodiment, and the center has concentric circular hole inert gas passage 2, connects with gas pipeline 5, receives gas gasholder station 3 through throttling control valve 4.
During discharge, open throttling control valve 4 earlier, allow inert gas flow to the inert gas passage 2 of graphite electrode 1, flow out, enter arc chamber from graphite electrode discharge end 6.When pressure reaches balance, start the discharge generation plasma, form plasma slab 7.Regulate choke valve, control inert gas flow, stable plasma discharge.The inert gas that flows to continuously not only can reduce the oxidation ablation of graphite, plays the effect of guard electrode.And can be used as the working gas of plasma, reduce the starting resistor and the operating voltage of plasma.When quitting work, cut off earlier plasma electrical source, give altogether stopping inert gas.
Claims (4)
1. the technology of inert gas shielding arc-plasma graphite electrode anit-oxidizing ablation loss is characterized in that graphite electrode 1 center has concentric circular inert gas passage 2.Inert gas passage 2 usefulness gas pipelines 5 connect, and receive gas gasholder station 3 through throttling control valve 4.Inert gas flows out from graphite electrode discharge end 6, enters arc chamber, is full of plasma slab 7.
2. the technology of inert gas shielding arc-plasma graphite electrode anit-oxidizing ablation loss according to claim 1 is characterized in that graphite electrode 1 is concentric with circular inert gas passage 2.
3. the technology of inert gas shielding arc-plasma graphite electrode anit-oxidizing ablation loss according to claim 1 is characterized in that inert gas given through throttling control valve 4 altogether by gas gasholder station 3.
4. the technology of inert gas shielding arc-plasma graphite electrode anit-oxidizing ablation loss according to claim 1 is characterized in that the flow through inert gas passage 2 at graphite electrode 1 center of inert gas, flows out from the discharge end of graphite electrode 1.Protection discharge end graphite electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101581545A CN102238795A (en) | 2010-04-28 | 2010-04-28 | Technology for protecting arc plasma graphite electrode from antioxidant erosion loss by inert gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101581545A CN102238795A (en) | 2010-04-28 | 2010-04-28 | Technology for protecting arc plasma graphite electrode from antioxidant erosion loss by inert gas |
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| Publication Number | Publication Date |
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| CN102238795A true CN102238795A (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101581545A Pending CN102238795A (en) | 2010-04-28 | 2010-04-28 | Technology for protecting arc plasma graphite electrode from antioxidant erosion loss by inert gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220842A (en) * | 2019-05-13 | 2019-09-10 | 江苏天楹环保能源成套设备有限公司 | A kind of electrode erosion detection instrument and its detection method |
| CN111422863A (en) * | 2020-04-06 | 2020-07-17 | 黑龙江工业学院 | Method for purifying dielectric barrier discharge plasma graphite |
| CN112802731A (en) * | 2020-11-18 | 2021-05-14 | 西南交通大学 | Material circulation modification device based on dielectric barrier discharge plasma |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381304A (en) * | 2002-01-08 | 2002-11-27 | 纪崇甲 | DC arc plasma equipment and process for preparing micron-class and nano-class powder material |
| CN101426327A (en) * | 2008-12-02 | 2009-05-06 | 华中科技大学 | Plasma jet device |
| CN101466194A (en) * | 2009-01-13 | 2009-06-24 | 大连理工大学 | Preionization atmos low-temperature plasma jet generator |
| WO2009112053A1 (en) * | 2008-03-12 | 2009-09-17 | Ricardo Enrique Biana | Plasma system |
-
2010
- 2010-04-28 CN CN2010101581545A patent/CN102238795A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381304A (en) * | 2002-01-08 | 2002-11-27 | 纪崇甲 | DC arc plasma equipment and process for preparing micron-class and nano-class powder material |
| WO2009112053A1 (en) * | 2008-03-12 | 2009-09-17 | Ricardo Enrique Biana | Plasma system |
| CN101426327A (en) * | 2008-12-02 | 2009-05-06 | 华中科技大学 | Plasma jet device |
| CN101466194A (en) * | 2009-01-13 | 2009-06-24 | 大连理工大学 | Preionization atmos low-temperature plasma jet generator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220842A (en) * | 2019-05-13 | 2019-09-10 | 江苏天楹环保能源成套设备有限公司 | A kind of electrode erosion detection instrument and its detection method |
| CN110220842B (en) * | 2019-05-13 | 2021-07-27 | 江苏天楹环保能源成套设备有限公司 | Electrode ablation detection tool and detection method thereof |
| CN111422863A (en) * | 2020-04-06 | 2020-07-17 | 黑龙江工业学院 | Method for purifying dielectric barrier discharge plasma graphite |
| CN111422863B (en) * | 2020-04-06 | 2022-10-11 | 黑龙江工业学院 | Method for purifying dielectric barrier discharge plasma graphite |
| CN112802731A (en) * | 2020-11-18 | 2021-05-14 | 西南交通大学 | Material circulation modification device based on dielectric barrier discharge plasma |
| CN112802731B (en) * | 2020-11-18 | 2022-01-25 | 西南交通大学 | Material circulation modification device based on dielectric barrier discharge plasma |
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Application publication date: 20111109 |