WO2003068382A1 - Dispositif de decharge - Google Patents

Dispositif de decharge Download PDF

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Publication number
WO2003068382A1
WO2003068382A1 PCT/JP2003/001658 JP0301658W WO03068382A1 WO 2003068382 A1 WO2003068382 A1 WO 2003068382A1 JP 0301658 W JP0301658 W JP 0301658W WO 03068382 A1 WO03068382 A1 WO 03068382A1
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WO
WIPO (PCT)
Prior art keywords
discharge
gas
electrode
region
inner electrode
Prior art date
Application number
PCT/JP2003/001658
Other languages
English (en)
Japanese (ja)
Inventor
Shigeru Tamaru
Hideo Kimura
Original Assignee
Furrex Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furrex Co., Ltd. filed Critical Furrex Co., Ltd.
Priority to JP2003567560A priority Critical patent/JPWO2003068382A1/ja
Priority to AU2003211327A priority patent/AU2003211327A1/en
Publication of WO2003068382A1 publication Critical patent/WO2003068382A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/818—Employing electrical discharges or the generation of a plasma
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B01J2219/0807—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes
    • B01J2219/0809—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes employing two or more electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0803—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
    • B01J2219/0805—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
    • B01J2219/0807—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges involving electrodes
    • B01J2219/0824—Details relating to the shape of the electrodes
    • B01J2219/0826—Details relating to the shape of the electrodes essentially linear
    • B01J2219/083—Details relating to the shape of the electrodes essentially linear cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J2219/0873—Materials to be treated
    • B01J2219/0875—Gas

Definitions

  • the present invention relates to a discharge device, and more particularly to a discharge device used for decomposing a gas to be treated by the action of electric discharge or synthesizing a chemical substance from the gas to be treated.
  • a pair of electrodes in the above-described discharge device has, for example, a minus one-dollar shape, and generates an arc discharge between the tip portions of both electrodes.
  • the arc since the arc has a substantially linear shape, the amount of the gas to be treated coming into contact with the arc per unit time is small, and as a result, a synthesis reaction or the like does not occur. However, even if they occurred, there was a problem that their progress was extremely slow.
  • the present applicant has firstly provided a discharge reactor having a cylindrical outer electrode having an inner peripheral surface as a discharge surface, and a cylindrical inner electrode having an outer peripheral surface as a discharge surface facing the discharge surface,
  • a discharge device having gas supply means for supplying a gas to be treated under pressure into a cylindrical annular passage between both discharge surfaces, and a power supply device for applying a discharge voltage between an outer electrode and an inner electrode has been proposed (see Japanese Patent Application Laid-Open 0 0 2-3 5 5 5 5 4 8).
  • the present applicant has decomposed the gas to be treated by using the above-described apparatus, and as a result, I felt the need to further improve the processing capacity of the equipment.
  • an object of the present invention is to provide a discharge device with further improved processing capacity for a gas to be processed. Disclosure of the invention
  • the present invention provides an outer electrode having a gas inlet at one end and a gas outlet at the other end, an inner electrode disposed inside the outer electrode, the inner electrode and the outer electrode.
  • a gas flowing means for flowing the gas to be treated in the space between the electrodes, and a power supply for applying a discharge voltage between the inner electrode and the outer electrode while the gas to be treated is flowing in the space.
  • a discharge device comprising: an annular discharge generating device defined by an intermediate portion of the outer peripheral surface of the inner electrode in the axial direction and an intermediate portion of the inner peripheral surface of the outer electrode in the axial direction.
  • an annular space defined by an outer peripheral surface of the inner electrode and an inner peripheral surface of the outer electrode on the downstream side of the discharge generation region, wherein a gap between the inner and outer electrodes of the annular space is Discharge generation area
  • a discharge spreading area that is larger than a gap between the inner and outer electrodes in the process, wherein the gas to be treated flows between the gas inlet and the gas outlet while the gas to be treated flows between the outer electrode and the inner electrode.
  • the discharge induced in the flow of the gas to be treated and generated in the discharge generating region spreads to the discharge spreading region.
  • the discharge in the discharge generation area is an arc discharge
  • the positive column in the arc discharge generated in a straight line extends in an arc or horizontal “U” shape in the discharge spread area according to the flow of the gas to be treated.
  • the gap of the discharge spreading area can be set such that the volume of the discharge spreading area is larger than the volume of the discharge generating area while keeping the shape of the inner peripheral surface of the outer electrode constant.
  • the outer electrode is an electrode that concentrically surrounds the inner electrode so that the discharge generated in the discharge generation region spreads and continues to the discharge spreading region. It is provided with a disc-shaped portion forming a generation region, and a truncated conical portion having a large diameter end connected to the gas outlet side end of the disc-shaped portion to form the discharge spreading region.
  • the axial length of the truncated conical portion is at least three times the axial / ⁇ length of the disc-shaped portion.
  • the gas to be treated flows so as to spread in a direction orthogonal to the axial direction from the discharge generation region to the gas outlet according to the expansion of the gap between the outer electrodes in the discharge spreading region. Induced by such a flow, the discharge in the discharge generation region easily spreads to the radio wave transmission region.
  • the inner electrode further includes a columnar portion connected to a small-diameter end of the truncated conical portion provided in the inner electrode.
  • the gap between the inner and outer electrodes in the discharge spreading area can be set to be constant in the cylindrical portion. Accordingly, the electric field formed by the predetermined discharge voltage also becomes constant in the column, and the discharge in the column easily spreads in the axial spring direction.
  • the axis of the outer peripheral surface of the inner electrode in the discharge generation region The distance between the middle part in the linear direction and the middle part in the axial direction of the inner peripheral surface of the outer electrode is 5 ram to 25 mm.
  • the axial length of the discharge generating region is 2 mm to 10 mm.
  • the discharge generation region having such a length in the axial direction gives the gas to be treated a conduit resistance for the gas to be treated to be efficiently opened in the discharge spread region.
  • the discharge effort region, together with the discharge spread region can fulfill the function of, for example, a throat for the gas to be treated.
  • FIG. 1 is a system diagram of a discharge apparatus in which a laughing gas decomposition experiment was performed using a discharge reactor according to an embodiment of the present invention.
  • FIG. 2 is a fragmentary front view of a discharge reactor according to an embodiment of the present invention.
  • FIG. 3 is a sectional view taken along line 3-3 in FIG.
  • FIG. 4 is a fragmentary front view of a main part of a discharge reactor according to another embodiment of the present invention.
  • a gas circulation device 3 as gas distribution means is attached to a cylindrical discharge reactor 2.
  • This device 3 has a first conduit 6 connecting between a gas inlet tube 4 at one end of the discharge reactor 2 and a gas outlet tube 5 at the other end.
  • a pressure regulator 9 and a gas adsorber 10 are provided.
  • the transparent box 8 is made of a synthetic resin, for example, polymethyl methacrylate.
  • a bypass 11 bypassing the gas adsorber 10 is connected to the first conduit 6 via first and second three-way valves 12 and 13.
  • an AC power supply device 16 as a power supply device is connected to both connection terminals 14 and 15 on the outer peripheral portion of the discharge reactor 2 via conductors 97 and 98.
  • the gas supply device 17 for the gas to be processed is provided between the gas inlet cylinder 4 and the first three-way valve 12 via the second conduit 18 via the first conduit 6.
  • the first on-off valve 19, the third three-way valve 20, and the flow meter 21 are sequentially connected to the second conduit 18 from the discharge reactor 2 side.
  • a check valve 21 for preventing gas flow to the valve 12 side is provided between the connection portion a with the second conduit 18 and the first three-way valve 12.
  • the inlet side of the third conduit 23 is connected to the first conduit 6 via the fourth three-way valve 22, and the outlet side is connected to the fourth three-way valve 22 of the first conduit 6.
  • a check valve 24 that blocks gas flow to the valve 22 side, a gas concentration measurement device 25, and the measurement device 25 side
  • a check valve 26 is provided to prevent gas flow into the pump.
  • a check valve 27 for preventing gas flow to the valve 22 between the connection b of the third conduit 23 with the outlet side of the third conduit 23 and the fourth three-way valve 22 is provided. Is done.
  • the fourth conduit 2 is connected between the transparent tube 8 and the connection part b of the first conduit 6 with the outlet side of the third conduit 23. 8 is connected to the inlet side, and the outlet side is connected to a gas concentration measuring device 25.
  • the outlet S of the third conduit 23 between the gas concentration measuring device 25 and the first conduit 6 is shared as the outlet S of the gas after the concentration measurement.
  • a second on-off valve 29 is provided between its connection part c with the first conduit 6 and the gas concentration measuring device 25.
  • a gas inlet 45 is provided at one end and a gas outlet is provided at the other end.
  • Electrically insulating first and second end plates 48, 49 having the same shape are applied to both annular end faces of the cylindrical outer electrode 47 having the ports 46, respectively, and the plurality of bolts 50 are used. It is attached to its outer electrode 47.
  • the outer electrode 47 has a large-diameter hole 51 on the first end plate 48 side, a small-diameter hole 52 on the second end plate 49 side, and a taper connecting both holes 51, 52. It has a hole 53, and the connecting portion between the tapered hole 53 and the large and small diameter holes 51, 52 has an arc shape.
  • the inner peripheral surfaces of the large and small diameter holes 51, 52 and the tapered hole 53 are mirror-finished.
  • the upper electrode 54 is held between the first and second end plates 48, 49 and is arranged concentrically with the outer electrode 47, and the inner and outer electrodes 47, 54 A space S is formed between them.
  • the inner electrode 54 has a disc-shaped portion 55 located at an intermediate portion in the axial direction, and first and second ends each having a large-diameter end connected to a gas inlet 45 side end and a gas outlet 46 side end.
  • the frusto-conical portions 56, 57, and the first shaft portion 58 which projects from the small-diameter end face of the first frusto-conical portion 56 and is smaller than that, and continues to the small-diameter end of the second frusto-conical portion 57.
  • it has a short cylindrical portion 59 having the same diameter as that, and a second shaft portion 60 projecting from the end face of the short cylindrical portion 59 and having a smaller diameter.
  • the first shaft portion 58 is fitted into a through hole 61 coaxial with the outer electrode 47 formed on the first end plate 48, and the small-diameter end face of the first truncated cone portion 56 is the first end plate. 4 Contact 8 In the outer electrode 47, the first truncated conical portion 56 and the disc-shaped portion 55 are located in the large-diameter hole 51, and the second truncated conical portion 57 is a large-diameter hole 51, tapered.
  • the hole 53 and the small-diameter hole 52 are located within the small-diameter hole 52, and the short cylindrical portion 59 is located within the small-diameter hole 52.
  • the second shaft portion 60 has a through hole coaxial with the outer electrode 47 formed on the second end plate 49.
  • the disc-shaped portion 55, the first and second truncated conical portions 56, 57, and the short cylindrical portion 59 are mirror-finished.
  • the inner and outer electrodes 47, 54, the outer and inner surfaces in the axial direction of the outer surface are brought closer.
  • the outer peripheral surface of the disk-shaped portion 55 and the vicinity of the tapered hole 53 of the large diameter hole 51 are located When the peripheral surfaces are brought closer to each other, an annular arc discharge generation region A1 is formed between them 55 and 51.
  • the arc discharge generation area Ai is connected to the end on the gas outlet 46 side, and the interval between the inner and outer electrodes of the inner and outer electrodes 47 and 54 is formed to be wider than the arc discharge generation area Ai.
  • the formed cylindrical arc discharge spreading area A 2 is, in the embodiment, a second truncated conical portion 57 and a short cylindrical portion 59 of the inner electrode 54, and a part of the large diameter hole 51 of the outer electrode 47, It is formed in cooperation with the tapered hole 53 and the small diameter hole 52. That is, the arc discharge generation area A1 and the arc discharge propagation area A2 exist in the space S.
  • An AC voltage of approximately 100 kV or less is applied between the inner and outer electrodes 54 and 47 for a discharge distance Ds between the outer peripheral surface of the disk-shaped portion 55 and the outer peripheral surface of the large-diameter hole 51 and the peripheral surface.
  • Ds 5 mni was set in order to apply an AC voltage of 7 to 10 kV between the inner and outer electrodes 54 and 47 as described later.
  • Ds is preferably about 25 Omm or less.
  • arc discharge spillover area A 2 is the arcing area A t over the gas outlet tube 5 has a discharge distance described below.
  • the discharge distance between the outer peripheral surface of the second truncated conical portion 57 of the inner electrode 54 and the inner peripheral surface of the large-diameter hole 51 of the outer electrode 47 is the discharge distance of the arc discharge generation region A (D s) about 1 to 2 times.
  • the discharge distance between the outer peripheral surface of the second truncated conical portion 57 of the inner electrode 54 and the inner peripheral surface of the tapered hole 53 of the outer electrode 47 is about 2 to 3 times Ds. .
  • the discharge distance between the outer peripheral surface of the second truncated conical portion 57 of the inner electrode 54 and the inner peripheral surface of the small-diameter hole portion 52 of the outer electrode 47 is approximately 3 to 4 times Ds. .
  • the discharge distance between the outer peripheral surface of the short cylindrical portion 59 of the inner electrode 54 and the inner peripheral surface of the small-diameter hole portion 52 of the outer electrode 47 is constant, and is about four times as large as Ds.
  • the axial length of the second truncated conical portion 57 is at least three times the axial length of the disc-shaped portion 55. In the present embodiment, the axial length of the second truncated conical portion 57 is about nine times the axial length of the disc-shaped portion 55. Further, the length of the disc-shaped portion 55 in the axial direction is 2 mm to 1 O mm. In the present embodiment, the length of the disc-shaped portion 55 in the axial direction is about 4 mm.
  • a plurality of small holes 63, 64 are formed around the through holes 61, 62 at regular intervals (see Fig. 3). 4 communicates with the outside electrode 47.
  • a flange portion 66 at one end of the gas inlet tube 4 is attached to the first end plate 48 with a plurality of bolts 67. It communicates with each small hole 63 of one end plate 48.
  • a flange portion 69 at one end of the gas outlet tube 5 is attached to the second end plate 49 by a plurality of bolts 70. Communicates with each small hole 64 of the second end plate 49.
  • One of the connection terminals 14 has a rod shape, and is inserted into the first end plate 48 through an elongated hole 73 formed so as to pass from the outer peripheral portion thereof between the adjacent small holes 63.
  • the other connecting terminal 15 is screwed on the outer peripheral portion of the outer electrode 47 at a position bisected by the bus bar on the one shaft portion 58.
  • reference numeral 77 denotes a sealing ring.
  • the outer electrode 47 and the inner electrode 54 are made of stainless steel, for example, JISSUS304.
  • the inner electrode 54 can be made of an A1 alloy, for example, JIS5052.
  • the first and second end plates 48, 49 are made of synthetic resin, for example, cloth-filled bakelite, and gas inlets having flange portions 66, 69, and gas outlet tubes 4, 5 are made of A1 alloy.
  • the first and second end plates 48, 49 composed of JIS5052 can be composed of ceramics
  • the gas inlet and gas outlet cylinders 4, 5 can be composed of stainless steel. is there.
  • Gas adsorber 10 is used as adsorbent It has an activated carbon fiber filter (manufactured by Nippon Riki Inol Co., Ltd., trade name: Kynol ACN305-15) with a density of 180 g Zm 3
  • the bulk density of the activated carbon fiber filter in the gas adsorber 10 is suitably from 90 to 180 g / m 3 .
  • the discharge device 1 is applied to the treatment of laughter (nitrous oxide ⁇ 2 ⁇ ) which is a medical anesthetic gas as a gas to be treated
  • the gas supply device 17 has a function of supplying a mixed gas composed of laughter and air, and a function of supplying only laughter.
  • the first on-off valve 19 was opened, and the gas supply unit 17 and the discharge reactor 2 were connected by switching the third three-way valve 20. Further, the gas outlet tube 5 of the discharge reactor 2 is communicated with the transparent box 8 by switching the fourth three-way valve 22, and the inlet and outlet of the gas adsorber 10 are switched by switching the first and second three-way valves 12, 13. The side was opened and the bypass 11 was closed. The second on-off valve 29 is in a closed state.
  • a gas mixture consisting of laughter of 15 V o 1% and air of 85 V o 1% is supplied to the discharge reactor 2 from the gas supply unit 17 and the supply amount of the mixed gas is reduced to 30 L. When it reached, the supply of the mixed gas from the gas supply unit 17 was stopped, and the first on-off valve 19 was closed.
  • a fan 7 is operated by blowing rate 1.
  • Check valve 2 1 ⁇ Circulate in the path of discharge reactor 2 to allow the mixed gas to flow through the space S between the inner and outer electrodes 47 and 54.
  • a high discharge voltage of 7 to: LO kV, 30 mA, 33 kHz was applied to the inner and outer electrodes 47 and 54 by the AC power supply 16. Accordingly, in a state where the mixed gas is flowing in the space S between the inner and outer electrodes 47 and 54, in the disc-shaped portion 55 of the inner electrode 54 and the large-diameter hole portion 51 of the outer electrode 47 surrounding the same. Arc discharge occurs in the inner circumference, that is, in the arc discharge generation area, and the arc is generated by the flow of the mixed gas. Along the second frusto-conical portion 57 and the short cylindrical portion 59, and then the arc discharge spreading area A2 was filled with the arc.
  • the positive column generated in a straight line in the arc discharge generation region A i extended in an arc or a horizontal “U” shape in the arc discharge propagation region A 2 , and such a phenomenon continued.
  • such extension of the positive column is believed to occur are induced in the gas mixture flowing as opened in a narrow arc generation region through the A wide arcing spread area A 2.
  • the second on-off valve 29 was opened, and the concentration of laughter was measured every 10 minutes after the start of discharge.
  • Table 1 shows the results of measuring the concentration of laughter.
  • the positive column force generated in a straight line in the arc discharge generation region A extended in an arc shape or a horizontal “U” shape in the arc discharge spread region A 2 , and such a phenomenon continued.
  • extension of the positive column is believed to occur are induced in the gas mixture flowing as open at a narrow pass through the arcing region A wide electrical arc spreading region A 2.
  • Table 2 shows the concentration of NO X in the collected gas.
  • the laughter can be decomposed mainly by a single substance and harmless oxygen and nitrogen by improving its decomposition ability. This has the effect of facilitating the treatment of cracked gas.
  • Tables 4 and 5 show that in Fig. 1, the first and second three-way valves 12 and 13 were switched so that the bypass 11 of the first conduit 6 was in communication and the inlet and outlet sides of the gas adsorber 10 were closed. Except for this, the results of gas analysis when laughter discharge treatment was performed in the same manner as in Example I are shown, and correspond to Tables 2 and 3, respectively. [Table 4]
  • N ⁇ x does not match the value of NO + N02 due to the fact that compounds other than NO and NO 2 are generated in the decomposition of NOx. In this case, 78% of the decomposition reaction of ⁇ 2 ⁇ ⁇ ⁇ 2 + ⁇ 2 occurred, and 22% of the decomposition reaction of ⁇ 2 ⁇ ⁇ ⁇ ⁇ + ⁇ 2 occurred.
  • Example I has a higher rate of decomposition of laughter. From this, it can be said that in order to enhance the decomposition of laughter, it is better to remove ⁇ and ⁇ 2 generated by the decomposition reaction with the gas adsorber 10.
  • the discharge device 1 is not limited to decomposition of laughter, and can be applied to, for example, synthesis of NO 2 using air nitrogen, decomposition of NOx, decomposition of CO 2, and the like.
  • the discharge generation region and Discharge in the discharge spread area A 2 good arcing.
  • the discharge in the discharge generation region and the discharge spread region A 2 is changed from a single discharge to an arc Discharge in the transition region from a single discharge to an arc discharge just before the discharge occurs.
  • the outer electrode 47 in the above-described embodiment has a large-diameter hole 51 on the first end plate 48 side, a small-diameter hole 52 on the second end plate 49 side, It has a tapered hole 53 connecting between 51 and 52, but is not limited to this.
  • the through-hole of the outer electrode 47 ′ may be an equal-diameter hole having the same inner diameter as the inner diameter of the large-diameter hole 51 ′.
  • the gap between the outer peripheral surface of the inner electrode 54 and the inner peripheral surface of the outer electrode 47 in the discharge region A 2 shown in FIG. 4 should be as small as possible with respect to the gap shown in FIG.
  • the axial length of the second truncated conical portion 57 ′ shown in FIG. 4 is approximately 15 times the axial length of the circular portion 55.
  • the same components as those in FIG. 2 are denoted by the same reference numerals.
  • the present invention it is possible to efficiently carry out the decomposition of laughter, the synthesis of NO 2 using air nitrogen, the decomposition of NO x, the decomposition of CO 2, etc. It is possible to provide a simple discharge device.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Treating Waste Gases (AREA)

Abstract

L'invention concerne un dispositif de décharge comprenant une électrode extérieure comportant une entrée de gaz à une extrémité et une sortie de gaz à l'autre extrémité, une électrode intérieure disposée à l'intérieur de l'électrode extérieure, des moyens de circulation de gaz faisant circuler le gaz à traiter dans l'espace entre les électrodes extérieure et intérieure, et une alimentation électrique permettant d'appliquer une tension de décharge entre les deux électrodes alors que le gaz circule dans l'espace. Ce dispositif est caractérisé en ce que l'espace comprend une région de décharge annulaire définie par une portion intermédiaire dans la direction axiale de la périphérie extérieure de l'électrode intérieure et par une portion intermédiaire dans la direction axiale de la périphérie intérieure de l'électrode extérieure et une région d'étalement de décharge annulaire consistant en un espace annulaire défini en aval de la région de décharge par la périphérie extérieure de l'électrode intérieure et la périphérie intérieure de l'électrode extérieure et dans laquelle l'écart entre les électrodes dans l'espace annulaire est plus important que cet écart dans la région de décharge, et en ce que l'écart de la région d'étalement de décharge est réglé de façon qu'une décharge puisse se produire dans la région de décharge lorsqu'une tension déterminée de décharge est appliquée entre les électrodes intérieure et extérieure, alors que le gaz s'écoule entre l'entrée et la sortie, et que cette décharge puisse s'étaler dans la région d'étalement et qu'elle soit maintenue.
PCT/JP2003/001658 2002-02-15 2003-02-17 Dispositif de decharge WO2003068382A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2003567560A JPWO2003068382A1 (ja) 2002-02-15 2003-02-17 放電装置
AU2003211327A AU2003211327A1 (en) 2002-02-15 2003-02-17 Discharge device

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Application Number Priority Date Filing Date Title
JP2002038274 2002-02-15
JP2002-38274 2002-02-15

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WO2003068382A1 true WO2003068382A1 (fr) 2003-08-21

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AU (1) AU2003211327A1 (fr)
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0747224A (ja) * 1993-08-10 1995-02-21 Ishikawajima Harima Heavy Ind Co Ltd フロンガス処理装置
JPH08290901A (ja) * 1995-04-20 1996-11-05 Meidensha Corp オゾン発生装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0747224A (ja) * 1993-08-10 1995-02-21 Ishikawajima Harima Heavy Ind Co Ltd フロンガス処理装置
JPH08290901A (ja) * 1995-04-20 1996-11-05 Meidensha Corp オゾン発生装置

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JPWO2003068382A1 (ja) 2005-06-09
AU2003211327A1 (en) 2003-09-04

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