JPH0596166A - Purifier for high frequency-heated exhaust gas - Google Patents
Purifier for high frequency-heated exhaust gasInfo
- Publication number
- JPH0596166A JPH0596166A JP3260032A JP26003291A JPH0596166A JP H0596166 A JPH0596166 A JP H0596166A JP 3260032 A JP3260032 A JP 3260032A JP 26003291 A JP26003291 A JP 26003291A JP H0596166 A JPH0596166 A JP H0596166A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- high frequency
- frequency power
- catalyst
- heating chamber
- 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.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 claims abstract description 90
- 238000000746 purification Methods 0.000 claims abstract description 28
- 239000011358 absorbing material Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 48
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 78
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000919 ceramic Substances 0.000 abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 229910000510 noble metal Inorganic materials 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 3
- 229930195733 hydrocarbon Natural products 0.000 abstract description 3
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001868 water Inorganic materials 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000010419 fine particle Substances 0.000 description 5
- 229910052878 cordierite Inorganic materials 0.000 description 4
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 229910052703 rhodium Inorganic materials 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
- F01N3/202—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means using microwaves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Induction Heating (AREA)
- Chimneys And Flues (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、たとえば自動車エンジ
ン等から排出される未燃焼の炭化水素、一酸化炭素、窒
素酸化物を完全燃焼させ、炭酸ガスと窒素、水に分解す
る排ガス浄化装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for completely burning unburned hydrocarbons, carbon monoxide and nitrogen oxides discharged from an automobile engine or the like to decompose carbon dioxide gas, nitrogen and water. It is a thing.
【０００２】[0002]
【従来の技術】従来のこの種の排ガス浄化装置は、コー
ディエライトなどの高密度のセラミックハニカム構造体
の表面に表面積を大きくするためにアルミナなどの微粒
子をコーティングし、その上に白金、ロジウム、パラジ
ウムなどの貴金属触媒を担持した排ガス浄化触媒体を、
自動車エンジンから発生する排熱、又は電気ヒータなど
の加熱手段を用いて高温度化し、未燃焼ガスの炭化水
素、一酸化炭素、窒素酸化物を完全燃焼させ炭酸ガスと
窒素、水とに分解するようにしていた。2. Description of the Related Art In a conventional exhaust gas purifying apparatus of this type, fine particles such as alumina are coated on the surface of a high density ceramic honeycomb structure such as cordierite to increase the surface area, and platinum and rhodium are coated on the surface. , An exhaust gas purification catalyst body carrying a precious metal catalyst such as palladium,
Exhaust heat generated from an automobile engine or a heating means such as an electric heater is used to raise the temperature to completely burn hydrocarbons, carbon monoxide, and nitrogen oxides of unburned gas to decompose into carbon dioxide gas, nitrogen, and water. I was doing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記のよ
うな排ガス浄化触媒体を、自動車エンジンから発生する
排熱で高温度化する場合、排ガス浄化触媒体が触媒とし
て機能する温度まで加熱されるのに時間を要し、その間
に未燃焼ガスが発生し通過していく。使用初期の段階で
未燃焼ガスを完全燃焼させることができない。電気ヒー
タなどの加熱手段を用いる場合も、排ガス浄化触媒体を
外周から加熱するので急速に温度を立ち上がらすことは
できず、排熱を利用するものと同様の課題があった。However, when the exhaust gas purifying catalyst body as described above is heated to a high temperature by the exhaust heat generated from the automobile engine, the exhaust gas purifying catalyst body is heated to a temperature at which it functions as a catalyst. It takes time, during which unburned gas is generated and passes through. Unburned gas cannot be completely burned in the initial stage of use. Even when a heating means such as an electric heater is used, since the exhaust gas purifying catalyst is heated from the outer periphery, the temperature cannot be raised rapidly, and there is a problem similar to that using exhaust heat.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に本発明の高周波加熱排ガス浄化装置は、セラミックハ
ニカム構造体の触媒担持体の表面にアルミナなどの微粒
子で高周波電力吸収材料をコーティングし、その表面に
貴金属などの浄化触媒を担持して排ガス浄化触媒体を構
成し、かつ加熱室内に高周波を攪乱するスタラーファン
を設けたものである。In order to solve the above problems, a high frequency heating exhaust gas purifying apparatus of the present invention is a high frequency power absorbing material coated with fine particles such as alumina on the surface of a catalyst carrier of a ceramic honeycomb structure, An exhaust gas purifying catalyst body is formed by supporting a purifying catalyst such as a noble metal on the surface thereof, and a stirrer fan for disturbing high frequency is provided in the heating chamber.
【０００５】[0005]
【作用】排ガス浄化触媒体に高周波を給電すると、触媒
担持体表面の高周波電力吸収材料そのものが発熱し、表
面に担持された浄化触媒が機能する温度に急速に加熱さ
せられる。高周波電力を排ガス浄化触媒体に給電する場
合、高周波の共振箱として作用する加熱室が必要で、加
熱室内に高周波の定在波がたち排ガス浄化触媒体に均一
な高周波電力が給電されず表面が不均一に加熱される。
また、部分加熱によるセラミックハニカム構造体の触媒
担持体の破損や非効率的発熱状態が発生するが、触媒担
持体表面の高周波電力吸収材料に高周波電力が均一に給
電されるように、加熱室内のスタラーファンで高周波を
攪乱し、排ガス浄化触媒体の浄化能力を高めるようにし
ている。When a high frequency power is supplied to the exhaust gas purifying catalyst, the high frequency power absorbing material itself on the surface of the catalyst carrier heats up and is rapidly heated to a temperature at which the purification catalyst supported on the surface functions. When supplying high-frequency power to the exhaust gas purifying catalyst, a heating chamber that acts as a high-frequency resonance box is required, and a high-frequency standing wave is generated in the heating chamber, and uniform high-frequency power is not supplied to the exhaust gas purifying catalyst and the surface is Heated unevenly.
In addition, although the catalyst carrier of the ceramic honeycomb structure is damaged or inefficiently generated by partial heating, high frequency power is uniformly supplied to the high frequency power absorbing material on the surface of the catalyst carrier. The stirrer fan disturbs high frequencies to enhance the purification capacity of the exhaust gas purification catalyst.
【０００６】高周波を利用した高周波加熱は、被加熱物
が高周波電力を吸収し自ら誘電加熱で発熱するものであ
る。この場合被加熱物の材料は比誘電率と誘電体損失角
が大きくないと、高周波電力を効率よく吸収せず急速な
発熱をしない。従来の排ガス浄化触媒体に用いられてい
る触媒担持体はコーディエライト又はムライトが一般的
であるが、これらの材料は比誘電率と誘電体損失角の値
が小さく高周波加熱には適さない。又貴金属触媒も高周
波電力で加熱されるものでない。In high-frequency heating using high-frequency waves, the object to be heated absorbs high-frequency power and heats itself by dielectric heating. In this case, unless the relative permittivity and the dielectric loss angle of the material to be heated are large, the high frequency power is not efficiently absorbed and rapid heat generation does not occur. The catalyst carrier used in the conventional exhaust gas purifying catalyst is generally cordierite or mullite, but these materials have small relative permittivity and dielectric loss angle and are not suitable for high frequency heating. Also, the precious metal catalyst is not heated by high frequency power.
【０００７】比誘電率と誘電体損失角の値が大きいなど
の高周波電力吸収材料を触媒担持体の表面に用い、その
上に浄化触媒を担持して排ガス浄化触媒体を構成し、こ
の排ガス浄化触媒体に高周波発振源であるマグネトロン
から発振した高周波を給電すると、触媒担持体表面の高
周波電力吸収材料は高周波電力を吸収し自己発熱する。
しかも内部発熱であるので外部に逃げる余分な熱がほと
んどなく、排ガス浄化触媒体は触媒として機能する温度
まで急速に加熱される。触媒担持体の表面に担持された
高周波電力吸収材料は極めて薄く、発熱体としての熱容
量は小さいため短時間で高温に加熱されやすい。触媒担
持体を構成しているセラミック構造体は、熱絶縁の役割
を果たし、浄化触媒が急速に高温度に立ち上がるのを助
ける。A high frequency power absorbing material having a large relative permittivity and a large dielectric loss angle is used on the surface of a catalyst carrier, and a purification catalyst is carried on the surface of the catalyst carrier to form an exhaust gas purification catalyst body. When a high frequency oscillated from a magnetron, which is a high frequency oscillation source, is supplied to the catalyst body, the high frequency power absorbing material on the surface of the catalyst carrier absorbs the high frequency power and self-heats.
Moreover, since it is an internal heat generation, there is almost no extra heat that escapes to the outside, and the exhaust gas purification catalyst body is rapidly heated to a temperature at which it functions as a catalyst. The high-frequency power absorbing material carried on the surface of the catalyst carrier is extremely thin and has a small heat capacity as a heating element, so that it is easily heated to a high temperature in a short time. The ceramic structure forming the catalyst carrier serves as heat insulation and helps the purification catalyst to quickly rise to a high temperature.
【０００８】未燃焼ガスを含む排ガス気流中に配置され
た本発明の高周波加熱排ガス浄化装置は、高周波が給電
されることにより触媒として機能する温度まで急速に加
熱され、運転開始時の未燃焼ガスが分解されずに通過す
ることを防ぐ。The high-frequency heating exhaust gas purifying apparatus of the present invention arranged in an exhaust gas stream containing unburned gas is rapidly heated to a temperature at which it functions as a catalyst by being supplied with high frequency power, and the unburned gas at the start of operation is To prevent passing through without being decomposed.
【０００９】しかも加熱室に高周波が均一に給電される
ことにより、排ガス浄化触媒体の有効に機能する表面積
が広がり浄化力を高める。Moreover, by uniformly supplying high frequency to the heating chamber, the surface area of the exhaust gas purifying catalyst that functions effectively increases, and the purifying power is enhanced.
【００１０】[0010]
【実施例】以下、本発明の一実施例を添付図面に基づい
て説明する。図において、１は高周波が給電さ被加熱物
が加熱される加熱室、２は加熱室１に高周波を給電する
高周波発振源であるマグネトロン、３はマグネトロン２
より発振した高周波を加熱室１へ導く導波管、４は導波
管３の開口で加熱室１への高周波給電口、５は加熱室１
を構成するもので排ガスの入口側にある吸気壁、６は同
じく出口側にある排気壁である。加熱室１は高周波の共
振箱として作用し、高周波を閉じ込め漏洩しないように
耐熱性のあるステンレス鋼などの金属板で構成されてい
る。加熱室１の一部を構成する吸気壁５と排気壁６も高
周波が漏洩しないよう金属材料でなり、又排ガスが流れ
るように金網やパンチングメタルなどの金属透過体で形
成されている。７は排ガス流入口、８は同じく排気口で
ある。このような構成の高周波加熱装置の加熱室１内で
吸気壁５側に、コーディエライト又はムライトなどのセ
ラミックハニカム構造触媒担持体の表面にアルミナなど
の微粒子で高周波電力吸収材料をコーティングし、その
上に白金、ロジウム、パラジウムの貴金属触媒などを担
持した排ガス浄化触媒体９を設け、さらに加熱室１内に
高周波を攪乱するスタラーファン１０を設けている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is a heating chamber in which a high frequency is supplied to heat an object to be heated, 2 is a magnetron which is a high frequency oscillation source for supplying a high frequency to the heating chamber 1, and 3 is a magnetron 2.
A waveguide 4 for guiding the oscillated high frequency wave to the heating chamber 1 is an opening of the waveguide 3 for supplying a high frequency power to the heating chamber 1, and 5 is a heating chamber 1
And an intake wall 6 on the exhaust gas inlet side and an exhaust wall 6 on the outlet side. The heating chamber 1 acts as a high-frequency resonance box, and is made of a heat-resistant metal plate such as stainless steel so as to trap and prevent high-frequency waves from leaking. The intake wall 5 and the exhaust wall 6 that form a part of the heating chamber 1 are also made of a metal material so that high frequencies do not leak, and are formed of a metal transmissive body such as a wire mesh or punching metal so that the exhaust gas flows. Reference numeral 7 is an exhaust gas inlet, and 8 is an exhaust outlet. In the heating chamber 1 of the high-frequency heating device having such a configuration, on the intake wall 5 side, the surface of the ceramic honeycomb structure catalyst carrier such as cordierite or mullite is coated with a high-frequency power absorbing material with fine particles such as alumina, An exhaust gas purifying catalyst 9 carrying a noble metal catalyst such as platinum, rhodium, or palladium is provided on the upper part, and a stirrer fan 10 for disturbing high frequency is further provided in the heating chamber 1.
【００１１】排ガス浄化触媒体９は、セラミックハニカ
ム構造触媒担持体の表面にアルミナなどの微粒子で１例
としてチタン酸バリュームＢａＴｉＯ3 、酸化亜鉛Ｚｎ
Ｏの半導体化したものなどの高周波電力吸収材料をコー
ティングし、その上に白金、ロジウム、パラジウムなど
の貴金属触媒、又はペロブスカイト型複合酸化物浄化触
媒ＡＢＯ3 （Ａ，Ｂ：金属原子）が担持されている。チ
タン酸バリュームＢａＴｉＯ3 、酸化亜鉛ＺｎＯの半導
体化したものなどは比誘電率と誘電体損失角の値が大き
く、高周波電力をよく吸収し急速に発熱する。The exhaust gas purifying catalyst 9 is made of fine particles such as alumina on the surface of a ceramic honeycomb structure catalyst carrier, and as an example, BaTiO 3 titanate, zinc oxide Zn.
A high frequency power absorbing material such as a semiconductor of O is coated, and a noble metal catalyst such as platinum, rhodium or palladium, or a perovskite type complex oxide purification catalyst ABO 3 (A, B: metal atom) is supported on it. ing. The titanate value BaTiO 3 and zinc oxide ZnO which are made into semiconductors have large values of relative permittivity and dielectric loss angle, and absorb high frequency power well to rapidly generate heat.
【００１２】スタラーファン１０は、加熱室１内に設け
られ高周波を攪乱するため羽根形状の金属板で構成さ
れ、回転軸が排気壁６などの加熱室１壁面にある軸受け
１１に嵌合して取りつけられ、排ガス流入口７、吸気壁
５及び排ガス浄化触媒体９を通過してきた排ガスの流れ
によって回転駆動させる構造にしている。マグネトロン
２より発振した高周波は高周波給電口４から加熱室１へ
給電されるが、高周波の共振箱として作用する加熱室１
内に高周波の定在波がたち、排ガス浄化触媒体９の発熱
にむらが発生する。加熱室１内でスタラーファン１０を
排ガスの流れによって回転駆動させると共振箱としての
寸法に変化が生じたことになり、定在波が移動し結果的
に排ガス浄化触媒体９の発熱が均一になされる。The stirrer fan 10 is provided in the heating chamber 1 and is composed of a blade-shaped metal plate for disturbing high frequencies, and its rotary shaft is fitted to a bearing 11 on the wall surface of the heating chamber 1 such as the exhaust wall 6. The structure is such that it is driven to rotate by the flow of the exhaust gas that has been attached and passed through the exhaust gas inlet 7, the intake wall 5, and the exhaust gas purification catalyst body 9. The high frequency oscillated from the magnetron 2 is fed from the high frequency power supply port 4 to the heating chamber 1, but the heating chamber 1 acts as a high frequency resonance box.
A high-frequency standing wave enters the inside, and unevenness occurs in the heat generation of the exhaust gas purification catalyst body 9. When the stirrer fan 10 is rotationally driven by the flow of exhaust gas in the heating chamber 1, the size of the resonance box changes, and the standing wave moves, resulting in uniform heat generation of the exhaust gas purification catalyst body 9. Done
【００１３】１２は加熱室１外で、排ガス浄化触媒体９
より吸気壁５側で、排ガス流入口７の近傍に設けられた
第２排ガス浄化触媒体である。第２排ガス浄化触媒体１
２は、触媒担持体として同じくコーディエライト又はム
ライトのセラミックハニカム構造体を用い、表面に表面
積を大きくするためのアルミナなどの微粒子をコーティ
ングし、その上に白金、ロジウム、パラジウムなどの貴
金属触媒を担持している。時間が経過し高温になった自
動車エンジンの排熱で加熱され、触媒としての機能を発
揮する。第２排ガス浄化触媒体１２を加熱室１内に設け
ても同じような効果が期待できる。Numeral 12 is outside the heating chamber 1, and is an exhaust gas purifying catalyst 9
It is a second exhaust gas purifying catalyst provided closer to the exhaust gas inlet 5 on the intake wall 5 side. Second exhaust gas purification catalyst body 1
2 also uses a cordierite or mullite ceramic honeycomb structure as a catalyst carrier, and the surface thereof is coated with fine particles such as alumina for increasing the surface area, and a noble metal catalyst such as platinum, rhodium or palladium is further coated thereon. Carry. It is heated by the exhaust heat of the automobile engine, which has become hot with the passage of time, and functions as a catalyst. Even if the second exhaust gas purifying catalyst 12 is provided in the heating chamber 1, the same effect can be expected.
【００１４】高周波を給電し急速に発熱させ触媒が機能
する温度まで短時間で立ち上がらすためには、排ガス浄
化触媒体９は熱容量を小さくする必要があり、触媒担持
体の大きさ重量は余り増やせない。従って排ガス浄化触
媒体９の容積は、第２排ガス浄化触媒体１２の容積より
小さくしている。未燃焼ガスを大量に含む排ガスが流れ
始めると浄化触媒体の表面積は大きなものが望まれ、第
２排ガス浄化触媒体１２が有効に作用する。排ガス浄化
触媒体９の触媒担持体表面に担持された高周波電力吸収
材料及び浄化触媒は薄い膜状であるため、排ガス浄化触
媒体９の発熱体としての熱容量は小さく、短時間で高い
温度まで立ち上がらすには有効である。In order to supply a high frequency and rapidly generate heat so that the temperature rises to a temperature at which the catalyst functions, the exhaust gas purifying catalyst 9 needs to have a small heat capacity, and the size and weight of the catalyst carrier can be increased too much. Absent. Therefore, the volume of the exhaust gas purification catalyst body 9 is smaller than the volume of the second exhaust gas purification catalyst body 12. When the exhaust gas containing a large amount of unburned gas starts to flow, it is desired that the surface area of the purification catalyst body is large, and the second exhaust gas purification catalyst body 12 works effectively. Since the high-frequency power absorbing material and the purification catalyst carried on the surface of the catalyst carrier of the exhaust gas purifying catalyst 9 are thin films, the heat capacity of the exhaust gas purifying catalyst 9 as a heating element is small, and it can rise to a high temperature in a short time. Is effective for
【００１５】高周波に対し加熱室１は共振箱として作用
し、内部に定在波が立つ。電界の強い点は、使用してい
る周波数によって決まる波長の４分の１以上加熱室１の
壁面から離れたところにある。高周波電力吸収材料を有
する排ガス浄化触媒体９は、電界の強い点に配置される
方が効果的で、排ガスの入口側金属透過体である吸気壁
５との間に４分の１の波長以上の間隙を設けている。For high frequencies, the heating chamber 1 acts as a resonance box, and standing waves stand inside. The point where the electric field is strong is located at a position apart from the wall surface of the heating chamber 1 by 1/4 or more of the wavelength determined by the frequency used. It is more effective that the exhaust gas purifying catalyst 9 having the high-frequency power absorbing material is arranged at a point where the electric field is strong, and the exhaust gas purifying catalyst 9 and the intake wall 5, which is the exhaust gas inlet side metal permeator, have a wavelength of 1/4 wavelength or more. The gap is provided.
【００１６】高周波はインピーダンスの急激な変化面で
は反射する。従って導波管３の開口を直接排ガス浄化触
媒体９の近傍にもってくると、効果的な高周波電力の吸
収が行われない。又高周波は進行波でもあり、給電面に
近い物体から吸収されて行く。このため高周波電力吸収
材料を有する排ガス浄化触媒体９近傍の空隙に給電する
ことが効果的で、排気壁６と排ガス浄化触媒体９との間
隙に高周波給電口４を設けている。さらに高周波給電口
４の近傍にスタラーファン１０をもってきて高周波を攪
乱し、定在波を動かせば排ガス浄化触媒体９により均一
に効果的高周波電力の吸収が行われる。The high frequency wave is reflected on the surface where the impedance changes abruptly. Therefore, if the opening of the waveguide 3 is brought directly to the vicinity of the exhaust gas purifying catalyst 9, the high frequency power is not effectively absorbed. The high frequency is also a traveling wave, and is absorbed by an object close to the feeding surface. For this reason, it is effective to feed power to the space near the exhaust gas purification catalyst body 9 having the high frequency power absorption material, and the high frequency power feed port 4 is provided in the gap between the exhaust wall 6 and the exhaust gas purification catalyst body 9. Further, if the stirrer fan 10 is brought near the high frequency power supply port 4 to disturb the high frequency and move the standing wave, the exhaust gas purifying catalyst 9 uniformly and effectively absorbs the high frequency power.
【００１７】このような構成の高周波加熱排ガス浄化装
置であれば、未燃焼ガスを含む排ガスが自動車エンジン
から流れる直前又は流れはじめて直後、マグネトロン２
を発振させ加熱室１に高周波を給電すると、排ガス浄化
触媒体９の触媒担持体の表面に担持された高周波電力吸
収材料が誘電加熱で自己発熱し、しかも内部発熱である
ので、排ガス浄化触媒体９の表面は触媒として機能する
温度まで短時間に発熱し、未燃焼ガスを分解する。未燃
焼ガスの通過を防ぐか、通過量を減少させることができ
る。In the high frequency heating exhaust gas purifying apparatus having such a structure, the magnetron 2 is provided immediately before or immediately after the exhaust gas containing unburned gas flows from the automobile engine.
When the high frequency power is supplied to the heating chamber 1 by oscillating, the high frequency power absorbing material carried on the surface of the catalyst carrier of the exhaust gas purifying catalyst 9 self-heats due to dielectric heating, and also internal heat is generated. The surface of 9 heats up to a temperature at which it functions as a catalyst in a short time, and decomposes unburned gas. It is possible to prevent passage of unburned gas or to reduce the passage amount.
【００１８】[0018]
【発明の効果】以上のように本発明の高周波加熱排ガス
浄化装置によれば、次の効果が得られる。 （１）たとえば自動車エンジンからの排熱、又は電気ヒ
ータを用いた加熱手段からの熱による外部加熱と異な
り、触媒担持体の表面にある高周波電力吸収材料の内部
発熱であるので、触媒が活性機能を表す温度まで立ち上
がる時間が短い。 （２）加熱室内でスタラーファンを排ガスの流れによっ
て回転駆動させると共振箱としての寸法に変化が生じた
ことになり、定在波が移動し結果的に排ガス浄化触媒体
の発熱が均一になされ、排ガス浄化触媒体の有効表面積
が広がり触媒の活性機能が向上する。 （３）高周波電力吸収材料と浄化触媒は薄い膜で担持さ
れているので、熱容量が小さく高温に急速に立ち上が
る。 （４）運転初期の段階で排ガス浄化触媒体が急速に加熱
されるので、未燃焼ガスが分解されずに通過していくこ
とを防ぐか、未燃焼ガスの通過量を減少させることがで
きる。 （５）高周波電力吸収材料の上に浄化触媒を担持させた
排ガス浄化触媒体と、高周波電力を吸収しにくい貴金属
触媒を有する第２の排ガス浄化触媒体とに分けると、高
周波電力は高周波電力吸収材料を有する排ガス浄化触媒
体に集中して吸収され、運転初期の高温変化に効果的で
ある。排熱が高い温度になると第２の浄化触媒体が効果
を表し、浄化装置としての能力が向上する。As described above, according to the high frequency heating exhaust gas purifying apparatus of the present invention, the following effects can be obtained. (1) Unlike external heating by exhaust heat from an automobile engine or heat from a heating means using an electric heater, for example, the internal heat generation of the high frequency power absorbing material on the surface of the catalyst carrier causes the catalyst to have an active function. It takes a short time to rise to the temperature. (2) When the stirrer fan is driven to rotate by the flow of exhaust gas in the heating chamber, the dimensions of the resonance box change, and the standing waves move, resulting in uniform heat generation of the exhaust gas purification catalyst. As a result, the effective surface area of the exhaust gas purifying catalyst is expanded and the activity function of the catalyst is improved. (3) Since the high frequency power absorbing material and the purification catalyst are supported by a thin film, the heat capacity is small and the temperature rises rapidly to a high temperature. (4) Since the exhaust gas purifying catalyst is rapidly heated in the initial stage of operation, it is possible to prevent the unburned gas from passing through without being decomposed, or to reduce the passing amount of the unburned gas. (5) When the exhaust gas purifying catalyst body in which the purifying catalyst is carried on the high frequency power absorbing material is divided into the second exhaust gas purifying catalyst body having the noble metal catalyst which hardly absorbs the high frequency power, the high frequency power absorbs the high frequency power. It is concentrated and absorbed in the exhaust gas purifying catalyst containing the material, and is effective for high temperature changes in the initial stage of operation. When the exhaust heat reaches a high temperature, the second purification catalyst body exerts its effect, and the ability of the purification device is improved.
【図１】本発明の一実施例を示す高周波加熱排ガス浄化
装置の側断面図FIG. 1 is a side sectional view of a high frequency heating exhaust gas purifying apparatus showing an embodiment of the present invention.
１ 加熱室 ２ マグネトロン ７ 排ガス流入口 ８ 排気口 ９ 排ガス浄化触媒体 １０ スタラーファン 1 Heating Chamber 2 Magnetron 7 Exhaust Gas Inlet 8 Exhaust Port 9 Exhaust Gas Purifying Catalyst 10 Stirrer Fan
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０５Ｂ 6/10 ３８１ 8915−3Ｋ // Ｃ０４Ｂ 41/90 Ｃ 6971−4Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical indication H05B 6/10 381 8915-3K // C04B 41/90 C 6971-4G
Claims (2)
に高周波を給電する高周波発振源と、前記加熱室内に設
けられたガス透過形状の触媒担持体とを備え、前記触媒
担持体の少なくとも一部表面に高周波電力吸収材料をコ
ーティングし、この高周波電力吸収材料の上に排ガス浄
化用触媒を担持して排ガス浄化触媒体を構成し、前記加
熱室への排ガス入口及び出口に金属透過体を設けるとと
もに加熱室内に高周波を攪乱するスタラーファンを設け
た高周波加熱排ガス浄化装置。1. A heating chamber to which a high frequency is supplied, a high frequency oscillation source for supplying a high frequency to the heating chamber, and a gas-permeable catalyst carrier provided in the heating chamber. At least a part of the surface is coated with a high-frequency power absorbing material, and an exhaust gas-purifying catalyst is carried on the high-frequency power absorbing material to form an exhaust gas-purifying catalyst body, and a metal permeation body is provided at the exhaust gas inlet and outlet to the heating chamber. A high-frequency heating exhaust gas purification device that is equipped with a stirrer fan that disturbs high frequencies in the heating chamber.
転駆動させる構成にした請求項１記載の高周波加熱排ガ
ス浄化装置。2. The high-frequency heated exhaust gas purification apparatus according to claim 1, wherein the stirrer fan is driven to rotate by the flow of exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3260032A JPH0596166A (en) | 1991-10-08 | 1991-10-08 | Purifier for high frequency-heated exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3260032A JPH0596166A (en) | 1991-10-08 | 1991-10-08 | Purifier for high frequency-heated exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0596166A true JPH0596166A (en) | 1993-04-20 |
Family
ID=17342358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3260032A Pending JPH0596166A (en) | 1991-10-08 | 1991-10-08 | Purifier for high frequency-heated exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0596166A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047680A (en) * | 2014-05-20 | 2014-09-17 | 周家镳 | Bionic purifier for carbon dioxide in fuel vehicle exhaust |
| EP2987975A1 (en) * | 2014-08-23 | 2016-02-24 | Advanced Technology Emission Solutions Inc. | Catalytic converter system and corresponding control method |
| US9657622B2 (en) | 2013-09-18 | 2017-05-23 | Advanced Technology Emission Solutions Inc. | Catalytic converter system with control and methods for use therewith |
| US10450915B2 (en) | 2013-09-18 | 2019-10-22 | Advanced Technology Emission Solutions Inc. | Emission control system with induction heating and methods for use therewith |
| CN110732199A (en) * | 2019-10-25 | 2020-01-31 | 昆明理工大学 | Automobile tail gas treatment device in automobile maintenance plants |
| US10557392B2 (en) | 2013-09-18 | 2020-02-11 | Advanced Technology Emission Solutions Inc. | Emission control system with temperature measurement and methods for use therewith |
| US10590818B2 (en) | 2016-11-24 | 2020-03-17 | Advanced Technology Emission Solutions Inc. | Emission control system with frequency controlled induction heating and methods for use therewith |
| US10590819B2 (en) | 2013-09-18 | 2020-03-17 | Advanced Technology Emission Solutions Inc. | Emission control system with resonant frequency measurement and methods for use therewith |
-
1991
- 1991-10-08 JP JP3260032A patent/JPH0596166A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9657622B2 (en) | 2013-09-18 | 2017-05-23 | Advanced Technology Emission Solutions Inc. | Catalytic converter system with control and methods for use therewith |
| US10450915B2 (en) | 2013-09-18 | 2019-10-22 | Advanced Technology Emission Solutions Inc. | Emission control system with induction heating and methods for use therewith |
| US10557392B2 (en) | 2013-09-18 | 2020-02-11 | Advanced Technology Emission Solutions Inc. | Emission control system with temperature measurement and methods for use therewith |
| US10590819B2 (en) | 2013-09-18 | 2020-03-17 | Advanced Technology Emission Solutions Inc. | Emission control system with resonant frequency measurement and methods for use therewith |
| CN104047680A (en) * | 2014-05-20 | 2014-09-17 | 周家镳 | Bionic purifier for carbon dioxide in fuel vehicle exhaust |
| EP2987975A1 (en) * | 2014-08-23 | 2016-02-24 | Advanced Technology Emission Solutions Inc. | Catalytic converter system and corresponding control method |
| US10590818B2 (en) | 2016-11-24 | 2020-03-17 | Advanced Technology Emission Solutions Inc. | Emission control system with frequency controlled induction heating and methods for use therewith |
| CN110732199A (en) * | 2019-10-25 | 2020-01-31 | 昆明理工大学 | Automobile tail gas treatment device in automobile maintenance plants |
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