JPH0417712A - Diesel exhaust gas purifying device - Google Patents
Diesel exhaust gas purifying deviceInfo
- Publication number
- JPH0417712A JPH0417712A JP2116191A JP11619190A JPH0417712A JP H0417712 A JPH0417712 A JP H0417712A JP 2116191 A JP2116191 A JP 2116191A JP 11619190 A JP11619190 A JP 11619190A JP H0417712 A JPH0417712 A JP H0417712A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- exhaust gas
- particulates
- magnetron
- microwave
- 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.)
- Granted
Links
- 238000000746 purification Methods 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 25
- 239000010419 fine particle Substances 0.000 abstract description 5
- 230000005684 electric field Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 23
- 210000004027 cell Anatomy 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 210000002421 cell wall Anatomy 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002699 waste material 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
- F01N3/028—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means using microwaves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は内燃機関などが排出する有害な可燃性微粒子を
除去し 排ガスを浄化するための装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for removing harmful combustible particulates and purifying exhaust gas emitted by an internal combustion engine or the like.
従来の技術
返電 ディーゼル機関の排ガス中に含まれるカーボンな
どの可燃性微粒子（パティキュレート）力（生体に与え
る影響が問題視され始め九 そのためセラミックスなど
からできたフィルタを用いてこの微粒子を捕集し また
一定期間後にバーナや電気ヒータで加熱・焼却する方法
か試みられている。しかしバーナは部品数も多く、信頼
性やコストに難点がある。また電気ヒータでは消費電力
か大きく、車載用としては不適である。Conventional technology Power return The power of combustible particulates (particulates) such as carbon contained in the exhaust gas of diesel engines (the impact on living organisms has begun to be seen as a problem).Therefore, filters made of ceramics etc. are used to collect these particulates. In addition, attempts have been made to heat and incinerate the waste using a burner or electric heater after a certain period of time.However, the burner has many parts and has drawbacks in terms of reliability and cost.In addition, electric heaters consume a large amount of power, so they are not suitable for use in automobiles. is inappropriate.
特開昭５９−５８１１４号公報に記載の技術はこれらを
解決する一例であり、セラミックハニカムのフィルタと
マグネトロンを組み合わせた装置である。この装置では
フィルタで微粒子を捕集し マグネトロンの発するマ
イクロ波によって溜った微粒子を選択的に加熱・焼却す
も そしてフィルタを再生しなか叡 繰り返し使用する
ものである。The technique described in Japanese Unexamined Patent Publication No. 59-58114 is an example of solving these problems, and is a device that combines a ceramic honeycomb filter and a magnetron. This device collects fine particles with a filter, selectively heats and incinerates the accumulated particles using microwaves emitted by a magnetron, and then uses the filter repeatedly without regenerating it.
発明が解決しようとする課題
しかし 上記従来技術においては マグネトロンから発
せられたマイクロ波がフィルタの中心付近の微粒子を加
熱し そこで生じた燃焼熱が主としてフィルタの後部に
移送される。その結果 フィルタの前部で微粒子は燃焼
せずに残り、セルの入口付近を閉塞してフィルタを不能
にすることがあった
そこで本発明は セラミックハニカムフィルタの前部に
堆積した微粒子も燃焼可能とし フィルタの入口が閉塞
されずに有効な排ガス浄化機能を果たせるディーゼル排
ガス浄化装置を提供するこ課題を解決する手段
本発明Ｃヨ ディーゼルの排気管の途中に置かれたセ
ラミックハニカム構造のフィルタにマグネトロンから発
せられたマイクロ波が照射される装置において、マグネ
トロンの発するマイクロ波の電界強度の最大となる域を
フィルタの長手方向の１／２より排ガス流入側になるよ
う、マグネトロンと缶ケース内のフィルタの相対位置を
設定したことを特徴とする。Problems to be Solved by the Invention However, in the above-mentioned prior art, microwaves emitted from a magnetron heat particles near the center of the filter, and the combustion heat generated there is mainly transferred to the rear part of the filter. As a result, the particulates remained unburned in the front part of the filter, blocking the cell inlet area and rendering the filter inoperable.The present invention therefore enables the particulates deposited in the front part of the ceramic honeycomb filter to also be combusted. To provide a diesel exhaust gas purification device that can perform an effective exhaust gas purification function without blocking the inlet of the filter. Means for solving the problem The present invention In a device that is irradiated with emitted microwaves, the magnetron and the filter in the can case are arranged so that the area where the electric field strength of the microwave emitted by the magnetron is maximum is on the exhaust gas inflow side from 1/2 of the longitudinal direction of the filter. It is characterized by setting a relative position.
作用
上記構成によれば 電波の強度をフィルタの前方側に移
行し フィルタの前部または前面を有効に加熱する。こ
のとき、前部で燃焼した微粒子の熱（よ 燃焼ガスと共
に後部に移送され後部の微粒子の燃焼を助けることがで
きる。Effect: According to the above structure, the intensity of the radio waves is transferred to the front side of the filter, and the front part or the front surface of the filter is effectively heated. At this time, the heat of the particulates burned in the front part is transferred to the rear part along with the combustion gas, helping to burn the particulates in the rear part.
実施例
以下、本発明の排ガス浄化装置の一実施例を添付図面に
もとづいて説明する。Embodiment Hereinafter, one embodiment of the exhaust gas purification apparatus of the present invention will be described based on the accompanying drawings.
図は本発明の排ガス浄化装置である。図中１はセラミッ
クをハニカム構造にしたフィルタで、内部にガスの流路
となる矩形のセル２ａまたは２ｂがセル壁３で区分され
多数存在する。セル２ａと２ｂの一端はそれぞれ交互
にプラグ４ａ、 ４ｂにより封じられ 排ガスがストレ
ートに通過できないようにしてあも セラミックフィル
タ１は外周に加熱膨張性の蛭石とセラミック繊維とバイ
ンダとからなるシート状緩衝材５を巻いた後、耐熱ステ
ンレス製の缶ケース６の後部に片寄って収納されていも
缶ケース６の前部には円筒状の導波管７が接続され
その端部にはマイクロ波の発信源であるマグネトロン８
が装備されている。このことによって缶ケース６はその
容積全体でマイクロ波の共鳴室９を構成し マイクロ波
の導入口である導波管７の端部とセラミックフィルタ１
との関係で、セラミックフィルタ１の前部でマイクロ波
が最大とな４ セラミックフィルタ１の前方缶ケース１
には排ガス導入管１０が接続され エンジン排気管１１
からの排ガス力（またはエアポンプ１２から給気管１３
を経た空気力丈 四方弁１４を介してセラミックフィル
タ１に導かれる。缶ケース６の後部はマフラー接続管１
５によってマフラー（図示せず）に結合されていも 缶
ケース６の内側にはセラミックフィルタ１の前後で、緩
衝材５を固定するようにストッパ１６ａ、 １６ｂが溶
接されている。排ガス導入管１０およびマフラー接続管
１５の内部には金属格子１７ａ、１７ｂを取り付け、電
波の外部への漏洩を防いでいる。The figure shows an exhaust gas purification device of the present invention. In the figure, reference numeral 1 denotes a filter having a ceramic honeycomb structure, and inside thereof there are a large number of rectangular cells 2a or 2b separated by cell walls 3, which serve as gas flow paths. One end of the cells 2a and 2b is alternately sealed with plugs 4a and 4b, respectively, to prevent exhaust gas from passing straight through. After wrapping the cushioning material 5, the cylindrical waveguide 7 is connected to the front part of the can case 6, even though it is stored in a biased position toward the rear of the can case 6 made of heat-resistant stainless steel.
At its end is a magnetron 8 which is the source of microwaves.
is equipped. As a result, the entire volume of the can case 6 constitutes a microwave resonance chamber 9, and the end of the waveguide 7, which is the microwave introduction port, and the ceramic filter 1
Due to the relationship, the microwave is maximum at the front of the ceramic filter 1.
An exhaust gas introduction pipe 10 is connected to the engine exhaust pipe 11.
from the exhaust gas force (or from the air pump 12 to the air supply pipe 13
The air force that has passed through is guided to the ceramic filter 1 via the four-way valve 14. The rear of the can case 6 is the muffler connection pipe 1
Stoppers 16a and 16b are welded to the inside of the can case 6 before and after the ceramic filter 1 so as to fix the cushioning material 5. Metal grids 17a and 17b are installed inside the exhaust gas introduction pipe 10 and the muffler connection pipe 15 to prevent leakage of radio waves to the outside.
また四方弁１４にはエンジン排気管１１を流れる排ガス
をセラミックフィルタｌを経ないでマフラー接続口１５
に流すバイパス管１８が接続されている。In addition, the four-way valve 14 allows exhaust gas flowing through the engine exhaust pipe 11 to pass through the muffler connection port 15 without passing through the ceramic filter l.
A bypass pipe 18 is connected thereto.
次に この実施例の構成における動作を、まずディーゼ
ルエンジンの通常運転時から説明する。Next, the operation of the configuration of this embodiment will be explained, starting with the normal operation of the diesel engine.
ディーゼルエンジンの排気管１１に（よ 機関の運転に
より微粒子を含んだ排ガスが流れる。そこから排ガス（
よ 四方弁１４によって連通した排ガス導入管１０を流
れ 共鳴室９に入る。ここで導波管７側に開口している
セラミックフィルタ１のセル２ａに入り、セル壁３を透
過してマフラー接続管１５側に開口しているセル２ｂに
入る。このとき排ガス中に含まれている微粒子（よ セ
ル壁３を透過できず、セル２ａ内に留まって堆積すも人
微粒子を取り除かれて浄化された排ガス６社マフラー
接続管１５に入り、排気マフラーを経て大気に放出され
る。このようにセラミックフィルタ１内に微粒子を溜め
る作業は １時間から２時間かけて継続して行なわれる
。そして十分に微粒子が溜って背圧が上がり、これ以上
運転を続けるとエンジンに悪影響を与える段階になると
、微粒子を焼却するセラミックフィルタ１の再生に人も
再生ではまず四方弁１４を回転させ、エンジン排気管１
１とバイパス管１ｇ、給気管Ｉ３と排ガス導入管１０と
を連通さす。このことによって排ガスをバイパス管１８
に逃がし 同時にエアポンプ１２を作動させ、給気管１
３を経て排ガス導入管１０より、セラミックフィルタ１
に空気を送り込ａ 次にマグネトロン８の電源をいれ
マイクロ波をセラミックフィルタ１に照射する。すると
堆積した微粒子の内部で放電が起こり、微粒子は加熱さ
れも このときセラミックフィルタ１は共鳴室９の後部
に位置しているた臥 マイクロ波の強度はセラミックフ
ィルタ１の前部で強くな４よって、セラミックフィルタ
１の前部に堆積している微粒子が主として加熱され 空
気に触れて燃焼を始めも そしてこの状態を約１０分間
保持した喪 マグネトロン８の電源を切も すると、セ
ラミックフィルタ１の内部で微粒子の燃焼熱が後部に移
行し セラミックフィルタ１の後部に堆積した微粒子の
燃焼に寄与する。この状態を約１０分続けると、セラミ
ックフィルタ１内の微粒子はほとんどが燃えつきてしま
う。その後エアポンプ１２の電源を切り、四方弁１４を
元の位置に戻して再生は完了する。そしてまた初期のよ
うにセラミックフィルタｌに微粒子を堆積する状態に戻
る。Exhaust gas containing particulates flows into the exhaust pipe 11 of the diesel engine as the engine operates.
The exhaust gas flows through the exhaust gas introduction pipe 10 communicated through the four-way valve 14 and enters the resonance chamber 9. Here, it enters the cell 2a of the ceramic filter 1 which is open to the waveguide 7 side, passes through the cell wall 3, and enters the cell 2b which is open to the muffler connection pipe 15 side. At this time, the particulates contained in the exhaust gas cannot pass through the cell wall 3 and remain in the cell 2a and accumulate. The process of accumulating particulates in the ceramic filter 1 in this way continues for one to two hours.Then, enough particulates accumulate and the back pressure rises, making it impossible to operate the filter any further. If this continues, when it reaches the stage where it will have a negative impact on the engine, people will start by rotating the four-way valve 14 to regenerate the ceramic filter 1 that incinerates the particulates.
1 and the bypass pipe 1g, and the air supply pipe I3 and the exhaust gas introduction pipe 10 are connected to each other. This allows the exhaust gas to be transferred to the bypass pipe 18.
At the same time, operate the air pump 12 and
3 and then from the exhaust gas introduction pipe 10 to the ceramic filter 1
Send air into a Next, turn on magnetron 8.
Ceramic filter 1 is irradiated with microwaves. Then, an electric discharge occurs inside the deposited particles, and the particles are heated. At this time, the ceramic filter 1 is located at the rear of the resonance chamber 9. Therefore, the intensity of the microwave is stronger at the front of the ceramic filter 1. The fine particles deposited on the front part of the ceramic filter 1 were mainly heated and started to burn when exposed to the air, but this state was maintained for about 10 minutes.When the power to the magnetron 8 was turned off, the inside of the ceramic filter 1 The combustion heat of the particulates moves to the rear part and contributes to the combustion of the particulates deposited at the rear part of the ceramic filter 1. If this state continues for about 10 minutes, most of the particles in the ceramic filter 1 will be burned out. Thereafter, the air pump 12 is turned off, the four-way valve 14 is returned to its original position, and the regeneration is completed. Then, the state returns to the state in which fine particles are deposited on the ceramic filter l as in the initial stage.
このようにしてセラミックフィルタ１の前部とりわけセ
ル２ａの入口付近の微粒子が良く燃焼し 微粒子が完全
に燃えつきないまで舷 繰り返しの再生でプラグ４ａの
付近の微粒子が増加することがなくなった よってセラ
ミックフィルタ１の排ガスの入口 プラグ４ａの周辺に
微粒子が堆積し セル３ａを閉塞してフィルタ１を不能
にするようなことがなくなった またセラミックフィル
タ１の前部で生じた熱を後部で有効に利用するた取 今
までのように微粒子が燃え尽きるまでマイクロ波の照射
をする必要がなくなっ九発明の効果
本発明によれ（瓜 ディーゼル排ガス浄化用のセラミッ
クフィルタを、その前半部にマイクロ波の電界強度を最
大に持ってくることにより、マグネトロンによりマイク
ロ波を照射したとき、フィルタのセルの入口付近に堆積
した微粒子をよく燃焼させる。よって微粒子で通路が閉
塞され フィルタが不能になることもなｌ、％ また
フィルタ前半に堆積した微粒子力丈 常に高再生率を達
成することができも よって燃焼熱がフィルタ後半の微
粒子の燃焼に寄与するた数 マグネトロンの運転を短縮
してＬ 有効に燃焼が継続すム そのためエネルギの消
費も少なくなり、実用的な機能を発揮できもIn this way, the particulates in the front part of the ceramic filter 1, especially in the vicinity of the inlet of the cell 2a, are well combusted, and the particulates near the plug 4a do not increase due to repeated regeneration until the particulates are completely burned out. Particulates no longer accumulate around the exhaust gas inlet plug 4a of 1, clogging the cell 3a and rendering the filter 1 inoperable. Also, the heat generated at the front of the ceramic filter 1 is effectively used at the rear. It is no longer necessary to irradiate microwaves until the particulates burn out, as was done in the past.9 Effects of the Invention With the present invention, a ceramic filter for diesel exhaust gas purification is installed, and the electric field strength of the microwave is applied to the front half of the filter to the maximum. By bringing the microwaves into the room, when microwaves are irradiated by the magnetron, the particulates that have accumulated near the entrance of the filter cell are well burnt out.Therefore, the particulates do not block the passages and make the filter inoperable. The power of particulates deposited in the first half of the filter makes it possible to always achieve a high regeneration rate. Therefore, the amount of combustion heat that contributes to the combustion of particulates in the second half of the filter. It consumes less energy and can perform practical functions.
【図面の簡単な説明】 図は本発明の一実施例の排ガス浄化装置の断面図であａ[Brief explanation of drawings] The figure is a sectional view of an exhaust gas purification device according to an embodiment of the present invention.
Claims (2)
ルタと、前記フィルタに堆積した微粒子を加熱・焼却す
るためのマイクロ波の発生器を構成要素とし、前記フィ
ルタの排ガス流入方向軸に対して中間より前方でマイク
ロ波の強度を最大にしたことを特徴とするディーゼル排
ガス浄化装置。(1) A filter that collects combustible particulates contained in exhaust gas and a microwave generator that heats and incinerates the particulates deposited on the filter are the constituent elements, and the exhaust gas inflow direction axis of the filter is A diesel exhaust gas purification device characterized in that the intensity of microwaves is maximized at the front of the middle.
容積とし、前記缶ケース内で前記フィルタの位置を排ガ
ス流入方向に対して中間より後方に設置し、マイクロ波
の発生器を前方端に設置し、前記フィルタの中間より前
方でマイクロ波の強度を最大にしたことを特徴とする請
求項１記載のディーゼル排ガス浄化装置。(2) The can case that houses the filter is made into a resonant volume for microwaves, and the filter is installed within the can case from the middle to the rear with respect to the exhaust gas inflow direction, and the microwave generator is installed at the front end. 2. The diesel exhaust gas purifying device according to claim 1, wherein the intensity of the microwave is maximized in front of the middle of the filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11619190A JP2715629B2 (en) | 1990-05-02 | 1990-05-02 | Diesel exhaust gas purification equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11619190A JP2715629B2 (en) | 1990-05-02 | 1990-05-02 | Diesel exhaust gas purification equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0417712A true JPH0417712A (en) | 1992-01-22 |
| JP2715629B2 JP2715629B2 (en) | 1998-02-18 |
Family
ID=14681090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11619190A Expired - Lifetime JP2715629B2 (en) | 1990-05-02 | 1990-05-02 | Diesel exhaust gas purification equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2715629B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008500487A (en) * | 2004-05-24 | 2008-01-10 | ネイダーランゼ、オルガニザティー、ボー、トゥーゲパストナトゥールウェテンシャッペルーク、オンダーツォーク、ティーエヌオー | Methods and means for chemically modifying gas or smoke |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03210013A (en) * | 1990-01-10 | 1991-09-13 | Mazda Motor Corp | Exhaust gas particulate purification device of diesel engine |
| JPH03210010A (en) * | 1990-01-10 | 1991-09-13 | Mazda Motor Corp | Exhaust gas particulate purification device of diesel engine |
-
1990
- 1990-05-02 JP JP11619190A patent/JP2715629B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03210013A (en) * | 1990-01-10 | 1991-09-13 | Mazda Motor Corp | Exhaust gas particulate purification device of diesel engine |
| JPH03210010A (en) * | 1990-01-10 | 1991-09-13 | Mazda Motor Corp | Exhaust gas particulate purification device of diesel engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008500487A (en) * | 2004-05-24 | 2008-01-10 | ネイダーランゼ、オルガニザティー、ボー、トゥーゲパストナトゥールウェテンシャッペルーク、オンダーツォーク、ティーエヌオー | Methods and means for chemically modifying gas or smoke |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2715629B2 (en) | 1998-02-18 |
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