JPH0532203Y2 - - Google Patents
Info
- Publication number
- JPH0532203Y2 JPH0532203Y2 JP8719989U JP8719989U JPH0532203Y2 JP H0532203 Y2 JPH0532203 Y2 JP H0532203Y2 JP 8719989 U JP8719989 U JP 8719989U JP 8719989 U JP8719989 U JP 8719989U JP H0532203 Y2 JPH0532203 Y2 JP H0532203Y2
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- electrode
- flat plate
- thin metal
- exhaust gas
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 20
- 239000003989 dielectric material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 36
- 208000028659 discharge Diseases 0.000 description 14
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Electrostatic Separation (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Description
【考案の詳細な説明】
利用産業分野
この考案は、オゾン発生装置あるいは大量の排
ガス中の窒素酸化物の処理用装置などの用途に用
いる放電装置に係り、平板型の高圧電極と接地電
極間に金属細線を充填した放電装置を単数または
複数並列させたユニツトを所要ダクト内に配置
し、安定してプラズマを発生させて排ガス浄化を
可能にした平板型細線極放電装置に関する。[Detailed description of the invention] Industrial field of application This invention relates to a discharge device used in ozone generators or devices for treating nitrogen oxides in large amounts of exhaust gas. The present invention relates to a flat plate type fine wire electrode discharge device in which a unit in which one or more discharge devices filled with thin metal wires are arranged in parallel is arranged in a required duct to stably generate plasma and purify exhaust gas.
背景技術
近年、種々の工業において、重油、ガス、石炭
等の燃焼排ガスが多量に排出されており、特に排
ガス中の窒素酸化物（以下NOxという）が大気
汚染の元凶とされているため、排ガスの浄化手段
が前記燃焼プラントに不可欠とされている。BACKGROUND ART In recent years, large amounts of combustion exhaust gases such as heavy oil, gas, and coal have been emitted in various industries.In particular, nitrogen oxides (hereinafter referred to as NOx) in exhaust gases are considered to be the cause of air pollution. Purification means are considered indispensable in the combustion plant.
この排ガスの浄化手段には、通常、集塵装置、
脱硫装置さらに脱硝装置等が併用されるが、特
に、NOxの除去が困難とされている。 This exhaust gas purification means usually includes a dust collector,
Desulfurization equipment and denitrification equipment are used in combination, but it is particularly difficult to remove NOx.
排ガスからの脱硝法として現在実用化されてい
るものは、いずれも複雑な化学プロセスを含み、
また装置も大型なものが多く、エネルギー消費が
大きいのが現状である。 All methods currently in practical use for denitrification from exhaust gas involve complex chemical processes.
Furthermore, many of the devices are large and consume a lot of energy.
一方、排ガス中のNOxをプラズマにて処理す
る方法も提案されている。例えば、特公昭52−
19827号公報、特公昭53−85771号公報には、排ガ
スをプラズマ発生装置により高温に加熱して原子
状に分離させる方法が提案されるが、大量の排ガ
ス中のNOx処理を行うにはエネルギー消費が大
きく、実用性がない。 On the other hand, a method of treating NOx in exhaust gas using plasma has also been proposed. For example,
Publication No. 19827 and Japanese Patent Publication No. 53-85771 propose a method of heating exhaust gas to a high temperature using a plasma generator to separate it into atomic particles, but it takes energy to process NOx in a large amount of exhaust gas. is large and impractical.
また、特公昭57−13326号公報には、一対の電
極間に多数の中間電極を配置して電極間を通過す
る排ガス中で放電し、NOxを低減する装置が提
案されている。 Furthermore, Japanese Patent Publication No. 57-13326 proposes an apparatus in which a large number of intermediate electrodes are disposed between a pair of electrodes and discharge is generated in the exhaust gas passing between the electrodes to reduce NOx.
一般に、排ガス中で放電はNOxを増加させる
とされているが、上記提案は電極間及び中間電極
間距離を極微小間隔とすることによりNOxを低
減している。しかし、電極間距離を極微小間隔と
することから、放電装置の製造が困難であり、ま
た、大量の排ガス中のNOx処理を行うには不適
である。 Although it is generally believed that discharge increases NOx in exhaust gas, the above proposal reduces NOx by making the distances between the electrodes and between the intermediate electrodes extremely small. However, since the distance between the electrodes is extremely small, it is difficult to manufacture a discharge device, and it is not suitable for treating NOx in a large amount of exhaust gas.
低エネルギーで構成の簡単な放電装置を用い、
燃焼排ガス中の数百ppmオーダーのNOxを低減
できれば、排ガスの浄化にとつて理想的である
が、大量の排ガス中のNOx処理を可能にした装
置は提案されていない。 Using a discharge device with low energy and simple configuration,
It would be ideal for exhaust gas purification if NOx in combustion exhaust gas could be reduced to the order of several hundred ppm, but no equipment has been proposed that makes it possible to treat NOx in large amounts of exhaust gas.
すなわち、構成の簡単な放電装置としてオゾン
発生装置がよく知られているが、前記提案と同様
にかかる用途には不適である。 That is, although an ozone generator is well known as a discharge device with a simple configuration, it is unsuitable for such applications as in the above proposal.
詳述すれば、管型オゾン発生装置（特公昭51−
6110号公報、特公昭46−42748号公報等）の場合
は、筒状の高圧電極を被包する如く、誘電体を配
置し、微小の放電空隙を介して筒状水冷接地電極
を配置した構成からなり、放電空隙に空気または
酸素を通してオゾンを得るもので、前記接地電極
は二重管で水などの冷媒が挿通している。 To be more specific, the tube-type ozone generator
6110, Japanese Patent Publication No. 46-42748, etc.), a dielectric material is arranged to enclose a cylindrical high-voltage electrode, and a cylindrical water-cooled ground electrode is arranged through a minute discharge gap. Ozone is obtained by passing air or oxygen into the discharge gap, and the ground electrode is a double tube through which a refrigerant such as water is passed.
従つて、管型オゾン発生装置の構成では、高温
かつ大量の排ガスを前記放電空隙中を通過させる
ことができない。 Therefore, with the configuration of the tube-type ozone generator, it is not possible to pass a large amount of high-temperature exhaust gas through the discharge gap.
また、プレート型オゾン発生装置（特公昭45−
22930号公報、特公昭51−6111号公報、特開昭50
−148290号公報、実開昭60−125485号公報等）の
場合も、高圧電極と接地電極間に誘電体を配置し
た微小間隔の放電空隙に放電するもので、高温か
つ大量の排ガスを前記放電空隙中を通過させるこ
とができず、管型と同様に、もし空隙を通過して
も、圧力損失が大きく、また目詰まりを生じる可
能性がある。 In addition, a plate type ozone generator (Special Public Interest Publication 45-
Publication No. 22930, Japanese Patent Publication No. 1973-6111, Japanese Patent Publication No. 1973
-148290, Utility Model Application Publication No. 60-125485, etc.), a dielectric material is placed between a high-voltage electrode and a ground electrode to discharge into a discharge gap at minute intervals, and a large amount of high-temperature exhaust gas is discharged from the discharge. It cannot be passed through a gap, and like the tubular type, even if it passes through a gap, there is a large pressure loss and there is a possibility of clogging.
考案の目的
そこで、この考案は、大量の排ガス中のNOx
処理を行うことを目的とし、かつ低エネルギー消
費で構成の簡単な放電装置の提案を目的としてい
る。Purpose of the invention Therefore, this invention aims to reduce NOx in large amounts of exhaust gas.
The purpose of this paper is to propose a discharge device with low energy consumption and a simple configuration.
考案の概要と効果
この考案は、
電極表面に誘電体を被着あるいは対向させた平
板型の高圧電極と接地電極間に、金属細線を均一
嵩密度で充填した放電装置を単数または複数並列
させた放電ユニツトを、所要ダクト内に配置し、
高電圧を印加した前記電極間の金属細線の充填部
に所要気体を通過させることを特徴とする平板型
細線極放電装置である。Overview and effects of the invention This invention consists of paralleling one or more discharge devices filled with thin metal wires at a uniform bulk density between a flat high-voltage electrode with a dielectric coated on the electrode surface or facing each other, and a ground electrode. Place the discharge unit in the required duct,
This is a flat plate type thin wire electrode discharge device characterized in that a required gas is passed through a filling portion of thin metal wires between the electrodes to which a high voltage is applied.
考案の構成と効果
この考案による放電装置は、高圧電極と接地電
極間に金属細線を、所要嵩密度で充填した構成を
基本単位としているため、高圧電極と接地電極間
の間隔を10mm以上と、従来に比較して著しく広く
設定でき、また、該金属細線が所要嵩密度で充填
されており、排ガスなどの気体の通過性にすぐ
れ、かつ同部内でのプラズマ発生量が多く安定し
ていることから、大量の排ガス中のNOx処理を
行うことができる。Structure and effects of the invention The basic unit of the discharge device according to this invention is a structure in which thin metal wires are filled between the high voltage electrode and the ground electrode at the required bulk density. It can be set significantly wider than conventional methods, the thin metal wires are filled with the required bulk density, the gas has excellent permeability for gases such as exhaust gas, and the amount of plasma generated within the same area is large and stable. This makes it possible to treat NOx in large amounts of exhaust gas.
この考案において、電極表面に被着あるいは対
向させる誘電体には、種々セラミツクス、ガラス
等の公知の誘電体が使用できる。 In this invention, various known dielectric materials such as ceramics and glass can be used as the dielectric material adhered to or facing the electrode surface.
この考案において、金属細線は、裸線の場合は
ステンレス鋼が好ましく、誘電体被膜を有する場
合はいかなる導電性金属細線でも使用でき、かか
る誘電体被膜も必ずしも完全に被覆する必要はな
い。また、金属細線に被覆する誘電体には、公知
の材料及び被覆方法が採用できる。 In this invention, the thin metal wire is preferably stainless steel if it is a bare wire, but any conductive thin metal wire can be used if it has a dielectric coating, and the dielectric coating does not necessarily need to be completely covered. Furthermore, known materials and coating methods can be used for the dielectric material coated on the thin metal wire.
金属細線の線直径は、装置の用途に応じて種々
の線直径が採用できるが、例えば、空気原料から
オゾンを生成するには0.1mm径が好ましく、同様
に充填嵩密度も使用ガスや用途目的等に応じて
種々の嵩密度が採用でき、例えば、空気原料から
オゾンを生成するには、0.156g／cm3近辺が好まし
い。 The wire diameter of the thin metal wire can vary depending on the application of the device. For example, a diameter of 0.1 mm is preferable for generating ozone from air as a feedstock. Similarly, the packed bulk density can vary depending on the gas used and the application. For example, a bulk density of around 0.156 g/ cm3 is preferable for generating ozone from air as a feedstock.
また、この考案において、印加電圧は、設定し
た高圧電極と接地電極間の間隔、金属細線の線直
径や材質、充填嵩密度により異なるが、エネルギ
ー効率として好ましいのはコロナ放電を開始する
低電圧であり、実用可能でかつ所要の効率が得ら
れる電圧を設定するとよい。 In addition, in this invention, the applied voltage varies depending on the distance between the set high-voltage electrode and the ground electrode, the wire diameter and material of the thin metal wire, and the filling bulk density, but in terms of energy efficiency, it is preferable to use a low voltage that starts corona discharge. It is recommended to set a voltage that is practical and provides the required efficiency.
図面に基づく考案の開示
第１図ａ，ｂ、第２図ａ，ｂはこの考案による
平板型細線極放電装置を示すダクトの斜視説明図
と装置の気体通過面を示す正面説明図である。DISCLOSURE OF THE INVENTION BASED ON DRAWINGS Figures 1a and 2b and 2a and 2b are a perspective explanatory view of a duct showing a flat plate type thin wire electrode discharge device according to the invention, and a front explanatory view showing a gas passage surface of the device.
実施例 １
第１図ａ，ｂに示す平板型細線極放電装置は、
排ガス中のNOx低減処理に用いる構成である。Example 1 The flat plate type fine wire electrode discharge device shown in Fig. 1a and b is as follows:
This configuration is used to reduce NOx in exhaust gas.
この考案による排ガス処理装置は、燃焼排ガス
を導出するダクト１の所要位置に放電ユニツト２
が、例えば、上面開口部からあるいは側面開口部
から装脱着自在に配設してあり、ダクト１内の排
ガスが全て放電ユニツト２内を通過する構成から
なる。 The exhaust gas treatment device according to this invention has a discharge unit 2 at a predetermined position of a duct 1 that leads out combustion exhaust gas.
The duct 1 is configured such that it can be attached and detached from, for example, the top opening or the side opening, and all the exhaust gas in the duct 1 passes through the discharge unit 2.
放電ユニツト２は、平板型の高圧電極３及び接
地電極４の各々両表面または片面にに誘電体（図
示せず）を被着し、高圧電極３と接地電極４を交
互に並列しかつ上下端に棒状の絶縁材セパレータ
５を介在させた平板型積層構造からなり、各高圧
電極３と接地電極４間に金属細線６を充填してあ
る。 The discharge unit 2 has a flat plate type high voltage electrode 3 and a ground electrode 4 each coated with a dielectric material (not shown) on both surfaces or one side, and the high voltage electrode 3 and the ground electrode 4 are arranged alternately in parallel and at the upper and lower ends. It has a flat plate type laminated structure with a rod-shaped insulating material separator 5 interposed between the electrodes, and thin metal wires 6 are filled between each high voltage electrode 3 and the ground electrode 4.
所要間隔で積層された平板型積層構造であるた
め、金属細線６を充填する場合、作業が容易でか
つ均一な嵩密度で充填することができ、高圧電極
３と接地電極４間を通過する気体の圧力損失を所
要値とすることができる。 Since it has a flat plate type laminated structure laminated at required intervals, when filling the thin metal wires 6, it is easy to fill the metal wires 6 and can be filled with a uniform bulk density. The pressure loss can be set to the required value.
このように平板型積層構造からなる放電ユニツ
ト２を所要ダクト１内に配置し、各高圧電極３と
接地電極４間に高電圧を印加すると、前記電極
３，４間の金属細線６の充填部にプラズマが発生
して、同部を通過させる燃焼排ガス中のNOxが
低減、除去される。 When the discharge unit 2 having a flat-plate laminated structure is placed in the required duct 1 and a high voltage is applied between each high-voltage electrode 3 and the ground electrode 4, the filling part of the thin metal wire 6 between the electrodes 3 and 4 is Plasma is generated in the combustion chamber, reducing and removing NOx in the combustion exhaust gas that passes through this section.
特に、このプラズマ処理は、高温（100℃以上）
のままの排ガス中のNOxの低減効果が大きく、
低温で処理する方法に比べて、排ガス中の水分除
去のプロセスをなくすことができる。 In particular, this plasma treatment requires high temperatures (over 100℃).
It has a large effect of reducing NOx in the raw exhaust gas,
Compared to low-temperature treatment methods, the process of removing moisture from exhaust gas can be eliminated.
また、NOx中のNO2の濃度は、放電処理後大
きくなるので、これを利用して水、又はアルカリ
水溶液に吸収処理することにより、NOxの低減
効果はさらに高まる。 Furthermore, since the concentration of NO 2 in NOx increases after the discharge treatment, the effect of reducing NOx is further enhanced by utilizing this concentration and absorbing it into water or an alkaline aqueous solution.
実施例 ２
第２図ａ，ｂに示す平板型細線極放電装置は、
オゾン発生装置に用いる構成である。Example 2 The flat plate type thin wire electrode discharge device shown in Fig. 2a and b is as follows:
This is a configuration used in an ozone generator.
すなわち、オゾン発生装置は、空気等の被処理
ガスを導入するダクト１０の所要位置に放電ユニ
ツト１１が、例えば、上面開口部からあるいは側
面開口部から装脱着自在に配設してあり、ダクト
１０内のガスが全て放電ユニツト１１内を通過す
る構成からなる。 That is, in the ozone generator, a discharge unit 11 is disposed at a desired position of a duct 10 into which a gas to be treated such as air is introduced, and can be freely attached and detached from, for example, an upper opening or a side opening. All the gas inside the discharge unit 11 passes through the discharge unit 11.
放電ユニツト１１は、平板型の高圧電極１２及
び接地電極１３の各々対向表面に誘電体（図示せ
ず）を被着しかつ非対向面に絶縁層を設け、高圧
電極１２と接地電極１３の上下端間に棒状の絶縁
材セパレータ１４を介在させ、電極間に金属細線
１５を充填した放電装置１６と冷却装置１７を交
互に積層した構造である。 The discharge unit 11 has a flat plate-shaped high voltage electrode 12 and a ground electrode 13, each of which has a dielectric material (not shown) coated on the opposing surface and an insulating layer provided on the non-opposed surface. It has a structure in which a rod-shaped insulating material separator 14 is interposed between the ends, and discharge devices 16 and cooling devices 17, in which thin metal wires 15 are filled between electrodes, are stacked alternately.
冷却装置１７は、種々の構成が採用できるが、
ここではプレートフイン型熱交換器からなり、冷
却水を流下させて、高圧電極１２及び接地電極１
３を所要温度に保持する。 Although various configurations can be adopted for the cooling device 17,
Here, it consists of a plate-fin type heat exchanger, which allows cooling water to flow down to connect a high-voltage electrode 12 and a ground electrode 1.
3 at the required temperature.
放電装置１６の各高圧電極１２と接地電極１３
間に高電圧を印加すると、前記電極間の金属細線
１５の充填部に無声放電が発生して、同部を通過
する空気中に多量のオゾンが発生する。 Each high voltage electrode 12 and ground electrode 13 of the discharge device 16
When a high voltage is applied between the electrodes, a silent discharge occurs in the filled part of the thin metal wire 15 between the electrodes, and a large amount of ozone is generated in the air passing through the part.
第１図ａ，ｂ、第２図ａ，ｂはこの考案による
平板型細線極放電装置を示すダクトの斜視説明図
と装置の気体通過面を示す正面説明図である。
１……ダクト、２，１１……放電ユニツト、
３，１２……高圧電極、４，１３……接地電極、
５，１４……絶縁材セパレータ、６，１５……金
属細線、１６……放電装置、１７……冷却装置。
FIGS. 1A and 1B and 2A and 2B are a perspective explanatory view of a duct showing a flat plate type fine wire electrode discharge device according to the invention, and a front view showing a gas passage surface of the device. 1...Duct, 2, 11...Discharge unit,
3, 12... High voltage electrode, 4, 13... Ground electrode,
5, 14... Insulating material separator, 6, 15... Metal thin wire, 16... Discharge device, 17... Cooling device.
Claims (1)
平板型の高圧電極と接地電極間に、金属細線を
均一嵩密度で充填した放電装置を単数または複
数並列させた放電ユニツトを、所要ダクト内に
配置し、高電圧を印加した前記電極間の金属細
線の充填部に所要気体を通過させることを特徴
とする平板型細線極放電装置。 ２ 電極の冷却装置を介在させて放電装置を単数
または複数並列させた放電ユニツトからなるこ
とを特徴とする請求項１記載の平板型細線極放
電装置。 ３ 金属細線に誘電体を被覆したことを特徴とす
る請求項１または請求項２記載の平板型細線極
放電装置。[Claims for Utility Model Registration] 1. One or more discharge devices filled with thin metal wires at a uniform bulk density are arranged in parallel between a flat plate-type high-voltage electrode and a ground electrode with a dielectric coated on the electrode surface or facing each other. A flat plate type thin wire electrode discharge device characterized in that a discharge unit is disposed in a required duct and a required gas is passed through a filled portion of thin metal wires between the electrodes to which a high voltage is applied. 2. The flat plate type fine wire electrode discharge device according to claim 1, comprising a discharge unit including one or more discharge devices arranged in parallel with a cooling device for the electrodes interposed therebetween. 3. The flat plate type thin wire electrode discharge device according to claim 1 or 2, characterized in that the thin metal wire is coated with a dielectric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8719989U JPH0532203Y2 (en) | 1989-07-25 | 1989-07-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8719989U JPH0532203Y2 (en) | 1989-07-25 | 1989-07-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0326356U JPH0326356U (en) | 1991-03-18 |
| JPH0532203Y2 true JPH0532203Y2 (en) | 1993-08-18 |
Family
ID=31636850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8719989U Expired - Lifetime JPH0532203Y2 (en) | 1989-07-25 | 1989-07-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0532203Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006247507A (en) * | 2005-03-10 | 2006-09-21 | National Institute Of Advanced Industrial & Technology | Exhaust gas treatment apparatus and treatment method thereof |
-
1989
- 1989-07-25 JP JP8719989U patent/JPH0532203Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0326356U (en) | 1991-03-18 |
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