JP3289484B2 - Discharge type exhaust gas purification device - Google Patents
Discharge type exhaust gas purification deviceInfo
- Publication number
- JP3289484B2 JP3289484B2 JP08663894A JP8663894A JP3289484B2 JP 3289484 B2 JP3289484 B2 JP 3289484B2 JP 08663894 A JP08663894 A JP 08663894A JP 8663894 A JP8663894 A JP 8663894A JP 3289484 B2 JP3289484 B2 JP 3289484B2
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- exhaust gas
- electrode
- cell
- receiving electrode
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 238000000746 purification Methods 0.000 title claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 42
- 239000011888 foil Substances 0.000 claims description 35
- 239000004020 conductor Substances 0.000 claims description 6
- 230000001413 cellular effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 82
- 150000002500 ions Chemical class 0.000 description 21
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 239000000463 material Substances 0.000 description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 11
- 229910052721 tungsten Inorganic materials 0.000 description 11
- 239000010937 tungsten Substances 0.000 description 11
- 238000000354 decomposition reaction Methods 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000003197 catalytic effect Effects 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 6
- 229930195733 hydrocarbon Natural products 0.000 description 6
- 150000002430 hydrocarbons Chemical class 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、触媒コンバータ，集塵
装置等に使用される放電型排気ガス浄化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge type exhaust gas purifying apparatus used for a catalytic converter, a dust collector, and the like.
【０００２】[0002]
【従来の技術】従来、コロナ放電等を利用して、排気ガ
ス中の酸化窒素物，炭化水素等を処理することにより排
気ガスを浄化する放電型排気ガス浄化装置として、特開
平５−５９９３４号公報に示すものが図５，図６に示す
ように知られている。2. Description of the Related Art Conventionally, as a discharge type exhaust gas purifying apparatus for purifying exhaust gas by treating nitrogen oxides, hydrocarbons and the like in the exhaust gas by utilizing corona discharge or the like, Japanese Patent Application Laid-Open No. 5-59934 is disclosed. What is shown in the gazette is known as shown in FIGS.
【０００３】図５において、符号１０１はエンジンで、
このエンジン１０１には排気管１０２が装着され、この
排気管１０２の途中に放電型排気ガス浄化装置１０３が
装着されている。この放電型排気ガス浄化装置１０３の
電極構成を示す断面図が図６に示されている。In FIG. 5, reference numeral 101 denotes an engine.
An exhaust pipe 102 is mounted on the engine 101, and a discharge-type exhaust gas purifying device 103 is mounted in the exhaust pipe 102. FIG. 6 is a sectional view showing an electrode configuration of the discharge type exhaust gas purifying apparatus 103. As shown in FIG.
【０００４】図において、放電型排気ガス浄化装置１０
３は１本の直線状のタングステン材からなる放電電極１
０４と、円筒状の受電極１０５からなり、円筒状の受電
極１０５の中心軸に放電電極１０４が位置している。In FIG. 1, a discharge type exhaust gas purifying apparatus 10 is shown.
3 is a discharge electrode 1 made of one linear tungsten material
04 and a cylindrical receiving electrode 105, and the discharge electrode 104 is located on the central axis of the cylindrical receiving electrode 105.
【０００５】そして、放電電極１０４を負極にし、受電
極１０５を正極にして放電電極１０４と受電極１０５の
間に、直流高圧電圧をかけると、両電極１０４，１０５
の間の空間１０６には、電界が形成される。受電極１０
５内に処理すべき排気ガスを導くと、排気ガス中の酸化
窒素物，炭化水素等の分子は、負のイオン１０７（例え
ばＮＯx - ）に帯電して受電極１０５で吸着分解され、
気体が浄化される。When a high DC voltage is applied between the discharge electrode 104 and the receiving electrode 105 while the discharge electrode 104 is set to the negative electrode and the receiving electrode 105 is set to the positive electrode,
An electric field is formed in the space 106 between the two. Receiving electrode 10
When the exhaust gas to be treated is introduced into the exhaust gas 5, molecules such as nitrogen oxides and hydrocarbons in the exhaust gas are charged to negative ions 107 (for example, NO x − ) and adsorbed and decomposed at the receiving electrode 105,
The gas is purified.
【０００６】[0006]
【発明が解決しようとする課題】ところが、従来の放電
型排気ガス浄化装置１０３にあっては、放電電極１０４
と受電極１０５の間に排気ガスが流れ、排気ガス中の酸
化窒素物，炭化水素等の汚染分子は受電極１０５内を通
過し、排気ガスの浄化効率が低いという問題がある。However, in the conventional discharge type exhaust gas purifying apparatus 103, a discharge electrode 104 is provided.
Exhaust gas flows between the electrode 105 and the receiving electrode 105, and contaminant molecules such as nitrogen oxides and hydrocarbons in the exhaust gas pass through the receiving electrode 105, resulting in low exhaust gas purification efficiency.
【０００７】排気ガスの浄化効率を高くするため、放電
電極１０４及び受電極１０５の長さを長くして酸化窒素
物等の汚染分子の受電極１０５の通過を防止しようとす
れば、放電型排気ガス浄化装置の長さが長くなり、好ま
しくない。特に、自動車の排気系を設計する際、床下空
間が狭いという車両レイアウトに適用する場合、与えら
れるスペースの長さに制限があることから、酸化窒素物
等の汚染分子の除去効率が低く、排気ガス中の汚染分子
の浄化効率を高めることが困難であった。If the length of the discharge electrode 104 and the receiving electrode 105 is increased to prevent the passage of contaminant molecules such as nitrogen oxides through the receiving electrode 105 in order to increase the purification efficiency of the exhaust gas, the discharge-type exhaust The length of the gas purifier becomes long, which is not preferable. In particular, when designing the exhaust system of an automobile, if it is applied to a vehicle layout in which the underfloor space is narrow, the length of the provided space is limited, so the efficiency of removing pollutants such as nitric oxides is low, and exhaust It has been difficult to increase the efficiency of purifying pollutants in the gas.
【０００８】そこで、図７に示すように、円筒状の受電
極１０５の中心部に、複数の直線状のタングステン材１
０８Ａを直線状に配列してなる放電電極１０８を設け、
放電電極１０８からの放出される電荷量を多くことが考
えられる。しかし、１つのタングステン材１０８Ａから
電荷が受電極１０５に向かって放射状に放出されるが、
隣接するタングステン材１０８Ａから放出される電荷
と、電気的に反発するので、複数のタングステン材１０
８Ａから受電極１０５に向かう電荷の量が減ることにな
る。Therefore, as shown in FIG. 7, a plurality of linear tungsten materials 1 are placed at the center of the cylindrical receiving electrode 105.
08A are arranged in a straight line to form a discharge electrode 108,
It is conceivable that the amount of charge released from the discharge electrode 108 is large. However, although electric charges are radially emitted from one tungsten material 108A toward the receiving electrode 105,
Since the electric charge repelled from the adjacent tungsten material 108A is electrically repelled, a plurality of tungsten materials 10A
The amount of charge traveling from 8A to the receiving electrode 105 is reduced.
【０００９】また、図８に示すように、円筒状の受電極
１０５の中心部付近に、複数の直線状のタングステン材
１０９Ａを円周状に配列してなる放電電極１０９を設
け、放電電極１０９からの放出される電荷量を多くこと
が考えられる。しかし、電気的な反発は少しは減るもの
の、依然として放電電極１０８の場合と同様な問題が生
じ、好ましくない。As shown in FIG. 8, a discharge electrode 109 in which a plurality of linear tungsten materials 109A are circumferentially arranged is provided near the center of a cylindrical receiving electrode 105. It is conceivable that the amount of charge released from the substrate is large. However, although the electric repulsion is slightly reduced, the same problem as in the case of the discharge electrode 108 still occurs, which is not preferable.
【００１０】本発明は、上述の問題点を解決するために
なされたもので、その目的は、気体中の汚染分子の除去
効率を高くできる放電型排気ガス浄化装置を提供するこ
とである。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a discharge-type exhaust gas purifying apparatus that can increase the efficiency of removing pollutant molecules in a gas.
【００１１】[0011]
【課題を解決するための手段】請求項１記載の発明は、
１以上の線状の導電体からなる放電電極と、波板状の金
属製箔板を介在させて、排気ガスの流れに平行な多層状
の金属製箔板の間にセル空間を形成させてなるセル状受
電極と、放電電極と該放電電極の下流側にセル状受電極
を対向配置して収容する容器とを備えていることを特徴
とする。According to the first aspect of the present invention,
A discharge electrode made of one or more linear conductors and a corrugated gold
A cell-shaped receiving electrode formed by interposing a metal foil plate and forming a cell space between the multilayered metal foil plates parallel to the flow of exhaust gas ; a discharge electrode; and a cell-shaped receiving electrode downstream of the discharge electrode. And a container that accommodates the electrodes so as to face each other.
【００１２】請求項２記載の発明は、請求項１記載の発
明において、放電電極は、複数の線状体で構成されてい
ることを特徴とする。請求項３記載の発明は、請求項１
記載の発明において、放電電極は、網状体に構成されて
いることを特徴とする。According to a second aspect of the present invention, in the first aspect, the discharge electrode is constituted by a plurality of linear bodies. The invention described in claim 3 is the invention according to claim 1.
In the described invention, the discharge electrode is formed in a mesh.
【００１３】請求項４記載の発明は、請求項１記載の発
明において、放電電極は、格子状に構成されていること
を特徴とする。請求項５記載の発明は、請求項１記載の
発明において、放電電極は、螺旋形状に構成されている
ことを特徴とする。According to a fourth aspect of the present invention, in the first aspect of the present invention, the discharge electrodes are formed in a lattice shape. According to a fifth aspect of the present invention, in the first aspect of the present invention, the discharge electrode is formed in a spiral shape.
【００１４】請求項６記載の発明は、請求項１記載の発
明において、放電電極は、蛇行形状に構成されているこ
とを特徴とする。According to a sixth aspect of the present invention, in the first aspect of the invention, the discharge electrode is formed in a meandering shape.
【００１５】[0015]
【作用】請求項１記載の発明において、放電電極とセル
状受電極の間に電圧をかける。放電電極から負または正
の電荷が放出され、この負または正の電荷は気体中の分
子に衝突して帯電し、負または正のガスイオンが生成さ
れる。According to the present invention, a voltage is applied between the discharge electrode and the cell-shaped receiving electrode. A negative or positive charge is emitted from the discharge electrode, and the negative or positive charge collides with a molecule in the gas to be charged, thereby generating a negative or positive gas ion.
【００１６】放電電極とセル状受電極の間に印加された
電圧及び気体の流れにより、この正または負のガスイオ
ンは放電電極からセル状受電極内へ流れる。セル状受電
極では、セル空間を通る正または負のガスイオンは、ク
ーロン力で金属製箔板に引っ張られ、金属製箔板に吸着
し、分解する。The positive or negative gas ions flow from the discharge electrode into the cell-shaped receiving electrode due to the voltage and the gas flow applied between the discharge electrode and the cell-shaped receiving electrode. In the cell-shaped receiving electrode, positive or negative gas ions passing through the cell space are pulled by the metal foil plate by Coulomb force, adsorbed on the metal foil plate, and decomposed.
【００１７】請求項２記載の発明において、放電電極
は、複数の線状体から構成されているので、放電電極の
長さが長くなり、放電電極から放出される電荷の総量が
多くなる。According to the second aspect of the present invention, since the discharge electrode is composed of a plurality of linear bodies, the length of the discharge electrode is increased, and the total amount of electric charge emitted from the discharge electrode is increased.
【００１８】請求項３及び４記載の発明においては、請
求項２記載の発明と同様の作用が生じる。請求項５及び
６記載の発明においては、請求項２記載の発明と同様の
作用が生じる。According to the third and fourth aspects of the invention, the same effect as the second aspect of the invention is produced. According to the fifth and sixth aspects of the invention, the same operation as the second aspect of the invention is produced.
【００１９】[0019]
【実施例】以下、図面により本発明の実施例について説
明する。請求項１，２記載の発明の実施例に係わる放電
型排気ガス浄化装置を、排気ガスの浄化用として使用さ
れる触媒コンバータに適用して説明する。Embodiments of the present invention will be described below with reference to the drawings. The discharge type exhaust gas purifying apparatus according to the first and second embodiments of the present invention will be described as applied to a catalytic converter used for purifying exhaust gas.
【００２０】図１，図２において、符号１は触媒コンバ
ータで、この触媒コンバータ１は密閉容器２を有してい
る。密閉容器２は金属製で半割り型に構成され、その中
央部は断面４角形状になっている。密閉容器２内に放電
型金属製触媒担体３が収容されている。この放電型金属
製触媒担体３は、セル状受電極４として構成され、セル
状受電極４の上流側には該セル状受電極４に放電部５が
対向・配置されている。セル状受電極４は密閉容器２の
内側に配置された上流側絶縁支持部材６と下流側絶縁支
持部材７により保持されている。上流側絶縁支持部材６
と下流側絶縁支持部材７はセラミック可撓製部材で構成
されている。1 and 2, reference numeral 1 denotes a catalytic converter, and the catalytic converter 1 has a closed container 2. The hermetically sealed container 2 is made of metal and is configured in a half-split type, and its central portion has a quadrangular cross section. A discharge-type metal catalyst carrier 3 is accommodated in the closed container 2. The discharge-type metal catalyst carrier 3 is configured as a cell-shaped receiving electrode 4, and a discharge portion 5 is arranged facing the cell-shaped receiving electrode 4 on the upstream side of the cell-shaped receiving electrode 4. The cell-shaped receiving electrode 4 is held by an upstream insulating support member 6 and a downstream insulating support member 7 arranged inside the closed vessel 2. Upstream insulating support member 6
The downstream insulating support member 7 is formed of a ceramic flexible member.
【００２１】セル状受電極４の下側に第１棒状電極８が
固設され、第１棒状電極８の周囲に第１セラミック環状
体９が外装されている。第１セラミック環状体９は第１
棒状電極８と密閉容器２を絶縁している。A first rod-shaped electrode 8 is fixed below the cell-shaped receiving electrode 4, and a first ceramic ring 9 is provided around the first rod-shaped electrode 8. The first ceramic annular body 9 is
The rod-shaped electrode 8 and the closed container 2 are insulated.
【００２２】セル状受電極４は、同じ大きさの矩形形状
をして排気ガスの流れに平行な平板状の金属製箔板４
Ａ，波板状の金属製箔板４Ｂを交互に積層してろう付け
接合で固着したものである。平板状の金属製箔板４Ａ，
波板状の金属製箔板４Ｂでコア部が構成されている。平
板状の金属製箔板４Ａ，波板状の金属製箔板４Ｂは矩形
形状をしてそれぞされ同じ大きさに構成され、排気ガス
の流れに平行になっている。平板状の金属製箔板４Ａ，
波板状の金属製箔板４Ｂの材料としては、アルミニウム
５％，鉄７５％，クロム２０％を含有したステンレス鋼
が用いられている。そして、平板状の金属製箔板４Ａ，
波板状の金属製箔板４Ｂの間にセル空間４Ｃが形成され
ている。The cell-shaped receiving electrode 4 has a rectangular shape having the same size and is a flat metal foil plate 4 parallel to the flow of exhaust gas.
A, a corrugated metal foil plate 4B is alternately laminated and fixed by brazing. Flat metal foil plate 4A,
The core portion is constituted by a corrugated metal foil plate 4B. The flat metal foil plate 4A and the corrugated metal foil plate 4B each have a rectangular shape, each of which has the same size, and is parallel to the flow of the exhaust gas. Flat metal foil plate 4A,
As a material of the corrugated metal foil plate 4B, stainless steel containing 5% of aluminum, 75% of iron, and 20% of chromium is used. Then, the flat metal foil plate 4A,
A cell space 4C is formed between corrugated metal foil plates 4B.
【００２３】一方、放電部５は、放電電極１０と、この
放電電極１０を支持するセラミック製の枠体１１とから
構成され、放電電極１０は、排気ガスの流れに対して複
数の線状体１２を直角な方向に並設した面状体に構成さ
れている。線状体１２は、タングステンを材料としたも
ので、その直径は約１００μｍとされている。タングス
テンを使用することにより、高温の排気ガスにも酸化せ
ず、耐久性を向上させている。On the other hand, the discharge part 5 is composed of a discharge electrode 10 and a ceramic frame 11 supporting the discharge electrode 10, and the discharge electrode 10 is provided with a plurality of linear members against the flow of exhaust gas. 12 are arranged in a plane at right angles. The linear body 12 is made of tungsten and has a diameter of about 100 μm. By using tungsten, durability is improved without being oxidized even by high-temperature exhaust gas.
【００２４】枠体１１には、金属線（図示せず）が埋め
込まれ、この金属線を介して複数の線状体１２が電気的
に接続している。枠体１１の下側における金属線には、
第２棒状電極１３が接続され、この第２棒状電極１３の
周囲に第２セラミック環状体１４が外装され、第２セラ
ミック環状体１４は第２棒状電極１３と密閉容器２を絶
縁している。A metal wire (not shown) is embedded in the frame 11, and a plurality of linear members 12 are electrically connected through the metal wire. The metal wire on the lower side of the frame 11 includes
The second rod-shaped electrode 13 is connected, and a second ceramic ring 14 is provided around the second rod-shaped electrode 13. The second ceramic ring 14 insulates the second rod-shaped electrode 13 from the closed container 2.
【００２５】上記の構成の放電部５は、密閉容器２の上
流側に形成された段部２Ａと円筒部材１５の間に保持さ
れている。そして、放電電極１０とセル状受電極４は高
圧直流電源１６に接続されている。The discharge section 5 having the above-described configuration is held between the cylindrical section 15 and the step 2A formed on the upstream side of the closed vessel 2. The discharge electrode 10 and the cell-shaped receiving electrode 4 are connected to a high-voltage DC power supply 16.
【００２６】しかして、本実施例においては、放電電極
１０とセル状受電極４の間に直流電圧をかける。放電電
極１０から負の電荷が放出され、この負の電荷は排気ガ
ス中の窒素酸化物，炭化水素等の分子に衝突して帯電
し、負のガスイオン（例えばＮＯX - ）が生成される。Thus, in this embodiment, a DC voltage is applied between the discharge electrode 10 and the cell-shaped receiving electrode 4. Negative charges are emitted from the discharge electrode 10, and the negative charges collide with molecules such as nitrogen oxides and hydrocarbons in the exhaust gas to be charged, thereby generating negative gas ions (for example, NO X − ). .
【００２７】放電電極１０とセル状受電極４の間に印加
された電圧及び排気ガスの流れにより、この負のガスイ
オンは放電電極１０からセル状受電極４内へ流れる。こ
のようにして、放電電極１０とセル状受電極４の間でコ
ロナ放電が起こる。The negative gas ions flow from the discharge electrode 10 into the cell-shaped receiving electrode 4 due to the voltage applied between the discharge electrode 10 and the cell-shaped receiving electrode 4 and the flow of the exhaust gas. Thus, corona discharge occurs between the discharge electrode 10 and the cell-shaped receiving electrode 4.
【００２８】セル状受電極４では、セル空間４Ｃを通る
負のガスイオンは、クーロン力で金属製箔板４Ａ，４Ｂ
に引っ張られ、金属製箔板４Ａ，４Ｂに吸着され、続い
て分解される。例えば、ＮＯX - はＮ2 ，Ｏ2 に分解
し、炭化水素のガスイオンは酸化されて、排気ガスが浄
化される。この分解の反応速度を速くするのに触媒が作
用している。In the cell-shaped receiving electrode 4, the negative gas ions passing through the cell space 4C are converted into metal foil plates 4A, 4B by Coulomb force.
To be absorbed by the metal foil plates 4A and 4B, and subsequently decomposed. For example, NO x - is decomposed into N 2 and O 2 , and gas ions of hydrocarbons are oxidized to purify exhaust gas. A catalyst acts to increase the rate of this decomposition reaction.
【００２９】ここで、一方、排気ガスの速度は１０ｍ／
ｓｅｃ〜４０ｍ／ｓｅｃ程度なので、排気ガスの速度が
ガスイオンの速度に充分な影響を与えものである。以上
の如き構成によれば、放電電極１０とセル状受電極４の
間に生成された負の電荷のガスイオンは、排気ガスの流
れによって、セル状受電極４の方向に移動する力を受
け、セル状受電極４に向けて移動するので、クーロン力
とあいまってセル状受電極４で吸着し易くできる。従っ
て、排気ガス中の汚染分子の吸着効率を高め、分解効率
を高めることができる。Here, the speed of the exhaust gas is 10 m /
Since the speed is about 40 m / sec to about 40 m / sec, the velocity of the exhaust gas sufficiently affects the velocity of the gas ions. According to the above configuration, the negatively charged gas ions generated between the discharge electrode 10 and the cell-shaped receiving electrode 4 receive the force of moving in the direction of the cell-shaped receiving electrode 4 due to the flow of the exhaust gas. Since it moves toward the cell-shaped receiving electrode 4, it can be easily absorbed by the cell-shaped receiving electrode 4 in combination with the Coulomb force. Therefore, the adsorption efficiency of pollutant molecules in the exhaust gas can be increased, and the decomposition efficiency can be increased.
【００３０】また、セル状受電極４は、排気ガスの流れ
に平行な多層状に積層された平板状の金属製箔板４Ａ，
波板状の金属製箔板４Ｂで構成されているので、これら
の金属製箔板４Ａ，４Ｂの表面積を広くすることができ
る。従って、これと相まってセル空間４Ｃからなるガス
流路径が約１ｍｍ程度なので、ガスイオンを吸着し易く
し、分解し易くできる。The cell-shaped receiving electrode 4 is a flat metal foil plate 4A laminated in a multilayer shape parallel to the flow of the exhaust gas.
Since it is composed of corrugated metal foil plates 4B, the surface area of these metal foil plates 4A and 4B can be increased. Accordingly, since the diameter of the gas flow path composed of the cell space 4C is about 1 mm, gas ions can be easily adsorbed and decomposed.
【００３１】さらに、放電電極１０は、複数の線状体１
２から構成されているので、放電電極１０の長さを長く
できる。従って、放電電極１０から放出される電荷の総
量が多く、帯電するガスイオンの量を多くし、排気ガス
の流れ方向における距離を短くして当該放電型排気ガス
浄化装置の構造をコンパクトに構成しつつ、ガスイオン
の吸着効率，分解効率を高くできる。また、放電電極１
０とセル状受電極４の間の電界強度を均一にし、セル状
受電極４での金属製箔板への吸着作用及び分解作用を均
一にし、当該放電型排気ガス浄化装置の耐久性を確保で
きる。Further, the discharge electrode 10 includes a plurality of linear members 1.
2, the length of the discharge electrode 10 can be increased. Therefore, the structure of the discharge type exhaust gas purifying apparatus is made compact by increasing the total amount of charges released from the discharge electrode 10, increasing the amount of charged gas ions, and shortening the distance in the flow direction of the exhaust gas. In addition, the gas ion adsorption efficiency and decomposition efficiency can be increased. Also, the discharge electrode 1
0, the electric field intensity between the cell-shaped receiving electrodes 4 is made uniform, the adsorption and decomposition of the cell-shaped receiving electrodes 4 on the metal foil plate are made uniform, and the durability of the discharge type exhaust gas purifying apparatus is ensured. it can.
【００３２】加えて、複数の線状体１２は、排気ガスの
流れに対して直角な方向に向けて面状に並んでいるの
で、放射される電子によって負に帯電したガスイオン電
荷は、排気ガスの流れによってセル状受電極４に向けて
移動するが、隣接して移動するガスイオン電荷による反
発力が小さく、セル状受電極４に向かい、負のガスイオ
ンの吸着効率，分解効率を高くできる。In addition, since the plurality of linear bodies 12 are arranged in a plane in a direction perpendicular to the flow of the exhaust gas, the gas ion charges negatively charged by the emitted electrons are discharged. Although it moves toward the cell-shaped receiving electrode 4 due to the flow of gas, the repulsive force due to the gas ion charges moving adjacently is small, and the gas-electron receiving electrode 4 moves toward the cell-shaped receiving electrode 4 to increase the adsorption efficiency and decomposition efficiency of negative gas ions. it can.
【００３３】なお、本実施例においては、放電電極１０
を負極側にし、且つ、セル状受電極４の側を正極側にし
ているが、放電電極１０の側を正極の側にするとともに
セル状受電極４を負極の側にすることもできる。In this embodiment, the discharge electrode 10
Is on the negative electrode side and the cell-shaped receiving electrode 4 is on the positive electrode side, but the discharge electrode 10 may be on the positive electrode side and the cell-shaped receiving electrode 4 may be on the negative electrode side.
【００３４】また、本実施例においては、放電電極１０
と、セル状受電極４の間の電源として、高圧直流電源１
６を使用しているが、高圧交流電源でも良い。さらに、
本実施例においては、セル状受電極４の平板状の金属製
箔板４Ａ，波板状の金属製箔板４Ｂの材料としては、ア
ルミニウム５％，鉄７５％，クロム２０％を含有したス
テンレス鋼を用いているが、かかる材料に限定されない
ことは勿論である。例えば、アルミニウム２〜６％，ク
ロム１２〜２５％，残部に鉄を含有してなるステンレス
鋼を用いることもできる。また、Ｎｉを含有することも
できる。In this embodiment, the discharge electrode 10
And a high-voltage DC power source 1 as a power source between the cell-shaped receiving electrodes 4.
6, but a high-voltage AC power supply may be used. further,
In this embodiment, as the material of the flat metal foil plate 4A and the corrugated metal foil plate 4B of the cell-shaped receiving electrode 4, stainless steel containing 5% aluminum, 75% iron, and 20% chromium is used. Although steel is used, it is a matter of course that the material is not limited to this. For example, stainless steel containing 2 to 6% of aluminum, 12 to 25% of chromium, and the balance iron can be used. Further, Ni can be contained.
【００３５】そして、本実施例においては、線状体１２
の材料としてタングステンを挙げているが、これに限定
されることなく、導電体であれば適用できる。導電体と
して、銅，鉄等の良導体を始め、モリブデン，ニッケル
を含有する金属の導体抵抗体、酸化シリコン等の半導体
を挙げることができる。また、ニクロム線，鉄−ニッケ
ル合金，鉄−クロム合金等にも適用できる。In this embodiment, the linear member 12
Tungsten is cited as a material for the material, but the material is not limited to this, and any conductive material can be used. Examples of the conductor include a good conductor such as copper and iron, a conductor resistor of a metal containing molybdenum and nickel, and a semiconductor such as silicon oxide. Further, the present invention can be applied to a nichrome wire, an iron-nickel alloy, an iron-chromium alloy, and the like.
【００３６】そして、また、本実施例においては、放電
電極１０は、複数の線状体１２から構成されているが、
図３に示すように１本の線状体２１で蛇行状に構成する
こともでき、また、図４に示すように螺旋状に構成する
こともできる。或いは、網状体や格子状に構成すること
もできる。これにより、放電電極１０の長さを長くでき
る。従って、放電電極１０から放出される電荷の総量が
多く、帯電するガスイオンの量を多くし、排気ガスの流
れ方向における距離を短くして当該放電型排気ガス浄化
装置の構造をコンパクトに構成しつつ、吸着効率，分解
効率を高くできる。Further, in this embodiment, the discharge electrode 10 is composed of a plurality of linear bodies 12,
As shown in FIG. 3, a single linear body 21 can be formed in a meandering shape, or can be formed in a spiral shape as shown in FIG. Alternatively, it may be configured in a net-like or lattice-like manner. Thereby, the length of the discharge electrode 10 can be lengthened. Therefore, the structure of the discharge type exhaust gas purifying apparatus is made compact by increasing the total amount of charges released from the discharge electrode 10, increasing the amount of charged gas ions, and shortening the distance in the flow direction of the exhaust gas. At the same time, adsorption efficiency and decomposition efficiency can be increased.
【００３７】或いは、本実施例においては、放電電極１
０は、排気ガスの流れに対して直角な方向に向いている
が、排気ガスの流れに対して斜めな方向に向けることも
できる。Alternatively, in this embodiment, the discharge electrode 1
0 points in a direction perpendicular to the flow of the exhaust gas, but can also be directed in a direction oblique to the flow of the exhaust gas.
【００３８】そして、さらに、本実施例における線状体
１２に尖状部を突設して放電電極を構成することもでき
る。加えて、本実施例におけるセル状受電極４の平板状
の金属製箔板４Ａ，波板状の金属製箔板４Ｂに誘電体物
質で被覆することもできる。誘電体物質として、例えば
酸化アルミニウム及びその混合物，酸化セリウム，或い
は、Ｐｔ，Ｐｄ，Ｒｈ等の触媒作用のある物質を挙げる
こともできる。この場合には、吸着面積が増大し、イオ
ン化したＮＯX ，炭化水素の分子に対して吸着機能，分
解機能が増大する。Further, a discharge electrode can be formed by projecting a pointed portion from the linear body 12 in this embodiment. In addition, the flat metal foil plate 4A and the corrugated metal foil plate 4B of the cell-shaped receiving electrode 4 in this embodiment can be coated with a dielectric substance. Examples of the dielectric substance include a substance having a catalytic action such as aluminum oxide and a mixture thereof, cerium oxide, and Pt, Pd, and Rh. In this case, the adsorption area increases, and the adsorption function and decomposition function for ionized NO x and hydrocarbon molecules increase.
【００３９】また、本実施例においては、セル状受電極
は、平板状の金属製箔板と波板状の金属製箔板を積層し
ているが、かかる構造に限定されることなく、例えば、
セル状受電極を、平板状の金属製箔板と波板状の金属製
箔板を交互に重ね、これらを巻き回して構成することが
できる。In this embodiment, the cell-shaped receiving electrode is formed by laminating a flat metal foil plate and a corrugated metal foil plate. However, the present invention is not limited to such a structure. ,
The cell-shaped receiving electrode can be configured by alternately stacking a flat metal foil plate and a corrugated metal foil plate, and winding these.
【００４０】その上、本実施例においては、放電型排気
ガス浄化装置を触媒コンバータに適用した例を説明した
が、これに限定されることなく、例えば、集塵装置に適
用することもできる。Further, in this embodiment, an example in which the discharge type exhaust gas purifying device is applied to the catalytic converter has been described. However, the present invention is not limited to this, and may be applied to, for example, a dust collecting device.
【００４１】或いは、本実施例においては、放電電極１
０とセル状受電極４の間に直流電圧をかけているが、直
流に限定されることはない。例えば、交流，周期的な波
形の電流，非周期的な波形の電流を使用することもでき
る。Alternatively, in this embodiment, the discharge electrode 1
Although a DC voltage is applied between 0 and the cell-shaped receiving electrode 4, the DC voltage is not limited to DC. For example, an alternating current, a current having a periodic waveform, or a current having an aperiodic waveform can be used.
【００４２】[0042]
【発明の効果】以上説明したように請求項１記載の発明
によれば、放電電極とセル状受電極の間に生成された正
または負の電荷のガスイオンは、気体の流れによって、
セル状受電極の方向に移動する力を受け、セル状受電極
に向けて移動するので、クーロン力とあいまってセル状
受電極で吸着，分解し易くできる。従って、気体中の汚
染分子の除去効率を高くできる。As described above, according to the first aspect of the present invention, the positive or negative charge gas ions generated between the discharge electrode and the cell-like receiving electrode are caused by the gas flow.
Since it moves toward the cellular receiving electrode in response to the force moving in the direction of the cellular receiving electrode, it can be easily adsorbed and decomposed by the cellular receiving electrode in combination with the Coulomb force. Therefore, the efficiency of removing contaminant molecules in the gas can be increased.
【００４３】また、セル状受電極は、気体の流れに平行
な多層状の金属製箔板で構成されているので、金属製箔
板の表面積を広くすることができ、また、これと相まっ
てセル空間からなるガス流路径が狭いので、ガスイオン
を吸着し易く、また、分解し易くできる。Further, since the cell-shaped receiving electrode is composed of a multi-layered metal foil plate parallel to the flow of gas, the surface area of the metal foil plate can be increased. Since the gas flow path comprising the space has a small diameter, gas ions can be easily adsorbed and decomposed.
【００４４】請求項２記載の発明によれば、請求項１記
載の発明において、放電電極は、複数の線状体から構成
されているので、放電電極の長さを長くできる。従っ
て、放電電極から放出される電荷の総量が多く、帯電す
るガスイオンの量を多くし、気体の流れ方向における距
離を短くして当該放電型排気ガス浄化装置の構造をコン
パクトに構成しつつ、ガスイオンの吸着効率，分解効率
を高くできる。According to the second aspect of the present invention, in the first aspect of the invention, since the discharge electrode is composed of a plurality of linear bodies, the length of the discharge electrode can be increased. Therefore, the total amount of the electric charge discharged from the discharge electrode is large, the amount of the charged gas ions is increased, and the distance in the gas flow direction is shortened to make the structure of the discharge type exhaust gas purification device compact, Gas ion adsorption efficiency and decomposition efficiency can be increased.
【００４５】また、放電電極とセル状受電極の間の電界
強度を均一にし、セル状受電極での金属製箔板への吸着
作用，分解作用を均一にし、当該放電型排気ガス浄化装
置の耐久性を確保できる。Further, the electric field intensity between the discharge electrode and the cell-shaped receiving electrode is made uniform, the adsorption action and the decomposition action on the metal foil plate at the cell-shaped receiving electrode are made uniform, and the discharge type exhaust gas purifying apparatus of the discharge type is used. Durability can be secured.
【００４６】請求項３及び４記載の発明によれば、請求
項２記載の発明と同様の効果を奏する。請求項５及び６
記載の発明によれば、請求項２記載の発明と同様の効果
を奏する。According to the third and fourth aspects of the invention, the same effects as those of the second aspect of the invention can be obtained. Claims 5 and 6
According to the invention described above, the same effect as that of the invention described in claim 2 can be obtained.
【図１】本発明の実施例に係わる放電型排気ガス浄化装
置の斜視図である。FIG. 1 is a perspective view of a discharge type exhaust gas purifying apparatus according to an embodiment of the present invention.
【図２】同放電型排気ガス浄化装置の縦断面図である。FIG. 2 is a longitudinal sectional view of the discharge type exhaust gas purifying apparatus.
【図３】放電電極の第１の変形例を示す説明図である。FIG. 3 is an explanatory diagram showing a first modification of the discharge electrode.
【図４】放電電極の第２の変形例を示す説明図である。FIG. 4 is an explanatory view showing a second modification of the discharge electrode.
【図５】従来における放電型排気ガス浄化装置の構成図
である。FIG. 5 is a configuration diagram of a conventional discharge type exhaust gas purification device.
【図６】同放電型排気ガス浄化装置の電極構成を示す横
断面図である。FIG. 6 is a transverse sectional view showing an electrode configuration of the discharge type exhaust gas purifying apparatus.
【図７】同放電型排気ガス浄化装置の放電電極のタング
ステン材の数を複数にした場合の電極構成を示す断面図
である。FIG. 7 is a cross-sectional view showing an electrode configuration in the case where the number of tungsten materials of a discharge electrode of the discharge type exhaust gas purification device is plural.
【図８】同放電型排気ガス浄化装置の放電電極のタング
ステン材の数を複数にした場合の電極構成を示す断面図
である。FIG. 8 is a cross-sectional view showing an electrode configuration when the number of tungsten materials of the discharge electrode of the discharge type exhaust gas purification device is plural.
３ 放電型排気ガス浄化装置 ４ セル状受電極 ４Ａ 平板状の金属製箔板 ４Ｂ 波板状の金属製箔板 ４Ｃ セル空間 １０ 放電電極 １２ 線状体 DESCRIPTION OF SYMBOLS 3 Discharge type exhaust gas purification apparatus 4 Cellular receiving electrode 4A Flat metal foil plate 4B Corrugated metal foil plate 4C Cell space 10 Discharge electrode 12 Linear body
フロントページの続き (72)発明者 渡辺 芳仁 東京都中野区南台５丁目24番15号 カル ソニック株式会社内 (72)発明者 橋本 英一郎 東京都中野区南台５丁目24番15号 カル ソニック株式会社内 (72)発明者 田辺 博 東京都中野区南台５丁目24番15号 カル ソニック株式会社内 (72)発明者 広岡 雅和 東京都中野区南台５丁目24番15号 カル ソニック株式会社内 (72)発明者 山口 典久 東京都中野区南台５丁目24番15号 カル ソニック株式会社内 (56)参考文献 特開 平４−300661（ＪＰ，Ａ) 特開 平６−10651（ＪＰ，Ａ) 特開 平４−256415（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F01N 3/08 - 3/28 B01J 35/04 B01J 19/08 Continued on the front page (72) Inventor Yoshihito Watanabe 5-24-15 Minamidai, Nakano-ku, Tokyo Cal Sonic Corporation (72) Inventor Eiichiro Hashimoto 5-24-15 Minamidai, Nakano-ku, Tokyo Cal Sonic Corporation (72) Inventor Hiroshi Tanabe 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation (72) Inventor Masakazu Hirooka 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation (72) Norihisa Yamaguchi 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation (56) References JP-A-4-300661 (JP, A) JP-A-6-10651 (JP, A) JP 4-256415 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) F01N 3/08-3/28 B01J 35/04 B01J 19/08
Claims (6)
と、波板状の金属製箔板を介在させて、排気ガスの流れに平
行な 多層状の金属製箔板の間にセル空間を形成させてな
るセル状受電極と、 放電電極と該放電電極の下流側にセル状受電極を対向配
置して収容する容器とを備えていることを特徴とする放
電型排気ガス浄化装置。1. A 1 or more discharge electrodes made of linear conductors
With a corrugated metal foil plate to
Rows of multi-layered metal foil plate and the cell-like receiving electrode made by forming between the cells empty during, contents which accommodates a cellular receiving electrode on the downstream side of the discharge electrodes and dissipating Denden electrode disposed opposite discharge exhaust gas purification device, characterized in that it comprises a vessel.
いることを特徴とする請求項１記載の放電型排気ガス浄
化装置。2. A discharge electrodes, the discharge-type exhaust gas purification device according to claim 1, characterized in that it is composed of a plurality of linear bodies.
とを特徴とする請求項１記載の放電型排気ガス浄化装
置。3. The discharge electrodes, the discharge-type exhaust gas purification device according to claim 1, characterized by being configured to mesh body.
とを特徴とする請求項１記載の放電型排気ガス浄化装
置。4. The discharge electrodes, the discharge-type exhaust gas purification device according to claim 1, characterized by being configured in a grid.
ことを特徴とする請求項１記載の放電型排気ガス浄化装
置。5. The discharge electrodes, the discharge-type exhaust gas purification device according to claim 1, characterized by being configured in a helical shape.
ことを特徴とする請求項１記載の放電型排気ガス浄化装
置。6. The discharge electrodes, the discharge-type exhaust gas purification device according to claim 1, characterized in that it is configured in a serpentine shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08663894A JP3289484B2 (en) | 1994-04-25 | 1994-04-25 | Discharge type exhaust gas purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08663894A JP3289484B2 (en) | 1994-04-25 | 1994-04-25 | Discharge type exhaust gas purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07293227A JPH07293227A (en) | 1995-11-07 |
| JP3289484B2 true JP3289484B2 (en) | 2002-06-04 |
Family
ID=13892571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08663894A Expired - Fee Related JP3289484B2 (en) | 1994-04-25 | 1994-04-25 | Discharge type exhaust gas purification device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3289484B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4619976B2 (en) * | 2006-03-30 | 2011-01-26 | 日本碍子株式会社 | Plasma reactor |
-
1994
- 1994-04-25 JP JP08663894A patent/JP3289484B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07293227A (en) | 1995-11-07 |
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