JPH03275110A - Exhaust gas filter - Google Patents
Exhaust gas filterInfo
- Publication number
- JPH03275110A JPH03275110A JP2073739A JP7373990A JPH03275110A JP H03275110 A JPH03275110 A JP H03275110A JP 2073739 A JP2073739 A JP 2073739A JP 7373990 A JP7373990 A JP 7373990A JP H03275110 A JPH03275110 A JP H03275110A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- ceramic
- gas filter
- sheet
- fibers
- 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
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 10
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 9
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 239000012784 inorganic fiber Substances 0.000 claims 1
- 150000001247 metal acetylides Chemical class 0.000 claims 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910010271 silicon carbide Inorganic materials 0.000 claims 1
- 239000011787 zinc oxide Substances 0.000 claims 1
- 230000008929 regeneration Effects 0.000 abstract description 15
- 238000011069 regeneration method Methods 0.000 abstract description 15
- 238000001354 calcination Methods 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 12
- 239000004927 clay Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 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 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004804 winding Methods 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
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)
- Filtering Materials (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Catalysts (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は ディーゼルエンジンなどの排ガス中の微粒子
（パーティキュレート）を除去し そのままパーティキ
ュレートを焼却し再生（リジェネレーション）すること
のできる排ガスフィルタに関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an exhaust gas filter that can remove particulates from exhaust gas from diesel engines, etc., and can directly incinerate and regenerate the particulates. be.
従来の技術
排ガス中のパーティキュレートを、フィルタを用いて除
去する方法が従来よく検討されている。2. Description of the Related Art Methods of removing particulates from exhaust gas using filters have been well studied in the past.
すなわち、 コーディエライトや繊維セラミックからな
るセラミックハニカムフィルタを用いてパーティキュレ
ートを捕集し 堆積したパーティキュ１ノートをそのま
ま焼却するのであり、その焼却手段に（よ 電気ヒータ
で着火させるもの、バーナーで加熱して焼却するものな
どがある。一方、マイクロ波を照射してパーティキュレ
ートを焼却する方法はすでに西ドイツ特許３０２４５３
９号で知られている。この方法（よ パンチングメタル
の周囲にシリカ繊維のマットを巻き付けてフィルタを構
成上 ディーゼル排ガス中に設置してパーティキュレ
ートを除去し さらに フィルタ容器に設けた導波管を
通してマイクロ波を照射して堆積したパーティキュレー
トを焼却する構成のものである。In other words, particulates are collected using a ceramic honeycomb filter made of cordierite or fiber ceramic, and the accumulated particulates are incinerated as they are. On the other hand, a method for incinerating particulates by irradiating microwaves has already been proposed in West German Patent No. 302453.
Known for No. 9. In this method, a silica fiber mat is wrapped around a punched metal to form a filter, which is placed in diesel exhaust gas to remove particulates, which are then deposited by irradiating microwaves through a waveguide installed in the filter container. It is configured to incinerate particulates.
一方、特開昭６０−１３７４１３号公報に見られるもの
（よ 誘電率の高い材料でフィルタ（例えばハニカムフ
ィルタ）を構成するものであり、フィルタ内に設置した
発振器でマイクロ波を照射してパーティキュレートを焼
却しようとするものである。On the other hand, the method described in Japanese Patent Application Laid-open No. 60-137413 (1983) is one in which a filter (for example, a honeycomb filter) is made of a material with a high dielectric constant, and particulates are generated by irradiating microwaves with an oscillator installed inside the filter. It is an attempt to incinerate the
発明が解決しようとする課題
西ドイツ特許３０２４５３９号で（よ フィルタ桐材に
シリカ繊維のマットを用いているたム円筒形のパンチン
グメタルが支えとして必要となっている。また 複雑な
形状とすることが難しく、フィルタの装置の容積に較べ
て濾過面積が小さいので目詰まりしやすく、そのた吹
圧力損失も大きく頻繁にパーティキュレートの焼却をし
なくてはならないものとなってい九 しかＬ シリカ繊
維のフィルタは排ガス流によって極めて容易に吹き飛は
され損傷するものであっ九
特開昭６０−１３７４１３号公報におけるもの（よ 酸
化チタンで作成されたハニカムフィルタを用いるという
もので、コーディエライトハニカム同機 熱容量の大き
なフィルタである。そのた吹再生において、パーティキ
ュレートの焼却可能温度に達するまでに時間がかかり、
かつ大容量のマイクロ波発振器を用ち＼ 大きな電力消
費が必要であって例えば車載用として用いるには不適当
である。Problems to be Solved by the Invention According to West German Patent No. 3,024,539, a cylindrical punched metal is required as a support for the filter using a silica fiber mat for the paulownia material. The filtration area is small compared to the volume of the filter device, so it is easy to get clogged.
The pressure loss is also large, making it necessary to incinerate particulates frequently.However, silica fiber filters are extremely easily blown away and damaged by the exhaust gas flow. The method in the publication uses a honeycomb filter made of titanium oxide, which has a large heat capacity compared to cordierite honeycomb filters.It takes a long time to reach the temperature at which particulates can be incinerated during blowing regeneration. It takes,
In addition, it uses a large-capacity microwave oscillator and requires large power consumption, making it unsuitable for use in vehicles, for example.
また ハニカムフィルタの場合、マイクロ波照射により
フィルタの中心部から加熱が始まり、方、クツション利
などへの放熱によってフィルタ外周付近は温度が上がり
にくいので、この部分に堆積しているパーティキュレー
トは焼却されずに残ることが判明した
さらに 中央部が加熱される結果、温度勾配に起因する
大きな熱応力を発生して外周部にクラックを生じさせて
フィルタの破損を招き、信頼性に乏しく使用に耐えるも
のではなかった
課題を解決するための手段
本発明（よ 繊維セラミック焼結体からなるハニカムフ
ィルタを用１＋＼ ハニカムフィルタの外周部に高誘電
率の利料を複合して構成して材料特性を変えた排ガスフ
ィルタを提供することを目的とするものである。In addition, in the case of a honeycomb filter, heating starts from the center of the filter due to microwave irradiation, and the temperature around the filter periphery is difficult to rise due to heat dissipation to cushions, etc., so particulates deposited in this area are incinerated. In addition, as a result of heating in the center, a large thermal stress due to the temperature gradient is generated, which causes cracks in the outer periphery, leading to damage to the filter, making it unreliable and unusable. Means for solving the problems that were not found in the present invention (1) A honeycomb filter made of a fiber ceramic sintered body is used.1+＼ A material with a high dielectric constant is compounded on the outer periphery of the honeycomb filter to change the material properties. The purpose of the present invention is to provide an exhaust gas filter with a high temperature.
作用
本発明（よ 焼成前のシート成形物を部分し方をコルゲ
ート加工して他方に接着し 巻き上げてできる円筒状の
コルゲートハニカムの開口部を交互にプラグ材で閉塞し
た後焼成して得られるコルゲートハニカム構造の排ガス
フィルタにおいて、外周を高誘電率の材料で覆って焼結
させたり、シートの外周に相当する部分に高誘電率の材
料を複合してコルゲート成形し 焼成して得たフィルタ
であるので、マイクロ波照射によって容易に外周部分の
温度を高めパーティキュレートを焼却するに際し 外周
部分に焼却されずに残ったパーティキュレートをも容易
に少ない消費電力で焼却することができる。また 外周
からも加熱されるため再生中に発生する温度勾配も緩和
でき、安全で信頼性の高い再生システムが構成できるの
である。Effects of the present invention (1) A corrugate obtained by corrugating one part of a sheet molded product before firing, gluing it to the other, rolling it up, alternately closing the openings of the cylindrical corrugate honeycomb with plug material, and then firing it. In a honeycomb-structured exhaust gas filter, the outer periphery is covered with a high-permittivity material and sintered, or the outer periphery of the sheet is composited with a high-permittivity material, corrugated, and fired. Therefore, when the temperature of the outer periphery is easily raised by microwave irradiation and the particulates are incinerated, the particulates that remain unincinerated in the outer periphery can be easily incinerated with less power consumption.In addition, heating from the outer periphery is also possible. As a result, the temperature gradient that occurs during regeneration can be alleviated, making it possible to construct a safe and highly reliable regeneration system.
実施例 以下に実施例を述べて説明する。Example Examples will be described below.
〈実施例１〉
平均繊維径が約３μｍで、 ０、 ｌ〜１０ｍｍの長さ
にヂョップしたアルミノシリケート繊維２０重量部を水
１０００重量部に十分に分散させて懸濁させた また
セラミック原料粉末としてセリサイト粘土１５重量部を
水５０重量部に懸濁させたこの繊維懸濁液とセラミック
原料粉末の懸濁液を撹拌しつつ混合し１． 次に有機
質結合剤として酢酸ビニル−アクリル共重合エマルジョ
ン溶液を１重量部加えて十分に撹拌混合させたのち、高
分子凝集剤を添加してアルミノシリケート繊維、 セリ
サイト粘土、有機質結合剤を互いに凝集させフロック状
の懸濁液とした こうして得られた凝集懸濁液を水で３
０００重量部に希釈したの板 通常の長網式抄紙機で抄
造してシートＡを作成したまた 上記と同じアルミノシ
ケート繊維の懸濁液を準備シ セリサイト粘土１０重
量敵 酸化チタン粉末８重量部を混合して同様に凝集さ
せ、抄造して酸化チタンを含有したシートＢを作成した
一方、粉砕したアルミノシリケート繊維２０重量部とセ
リサイト粘土９重量敵 酸化チタン９重量部をポリビニ
ルアルコールでペースト状にしたプラグ原料Ａ、アルミ
ノシリケート繊維２０重量敵 セリサイト粘土１５重量
部を同様にペースト状にしたプラグ原料Ｂを作成した
上記で得られたシーｈＡを部分し 一方を歯車形状の二
本のロールを持つコルゲートマシンでコルゲート状に底
形するとともに 一方のプラグ原料を一端に注入しつつ
、粉砕したアルミノシリケート繊維とセリサイト粘土を
有機質糊剤で混練して得られる接着剤をコルゲート頂部
に塗布して他方の平板状シートを貼付ける。ここで得ら
れた段ボール形状の成形体のコルゲート頂部に上記接着
剤を塗布するとともに 他方のプラグ原料をもう一方の
端部に注入して芯の上に円筒状に巻き上げて、さらにそ
の外周をシーｈＢで一重以上巻いてハニカム形状の成形
体を得た この成形体はハニカムセルＱ 排ガス流入側
の一端がプラグ原料Ａで封止され他端で開放上隣接する
セルでは流出側となる他端がプラグ原料Ｂで封止された
構造を持つ。まｔ、−芯の流入側端部にはプラグ原料Ａ
を充填し これを電気炉中１２５０℃２時間加熱焼成
すると有機物は焼失して、アルミノシリケート繊維とセ
リサイト粘土及び酸化チタン粒子は互いに焼結してセラ
ミック化した繊維セラミックハニカム構造のフィルタが
得られた このフィルターを構成する材料は 気孔率７
３％であって室温における熱容量も気孔率に応じて小さ
いものであつｔラ この実施例を第１図に斜視阻 第
２図に断面の模式図を示す。 １ａは排ガスフィルタで
、セラミックシートをコルゲートハニカム形状としてセ
ル２の一端に酸化チタンを複合した流入側プラグ３、他
端には流出側プラグ４が交互に詰められており、外周は
酸化チタンを含んだ繊維セラミック（高誘電率部分５）
で覆われている。中心部分は巻き上げ時の芯６の部分で
、流入側プラグ材が詰められている。<Example 1> 20 parts by weight of aluminosilicate fibers having an average fiber diameter of about 3 μm and chopped to a length of 0.1 to 10 mm were sufficiently dispersed and suspended in 1000 parts by weight of water.
This fiber suspension prepared by suspending 15 parts by weight of sericite clay as ceramic raw material powder in 50 parts by weight of water and the suspension of ceramic raw material powder were mixed with stirring.1. Next, 1 part by weight of vinyl acetate-acrylic copolymer emulsion solution was added as an organic binder and stirred and mixed thoroughly. Then, a polymer flocculant was added to coagulate the aluminosilicate fibers, sericite clay, and organic binder. The flocculated suspension thus obtained was mixed with water for 3 minutes.
Sheet A was prepared by making a sheet diluted to 0.000 parts by weight using a normal Fourdrinier paper machine.A suspension of the same aluminosicate fibers as above was also prepared.10 weights of sericite clay.8 weights of titanium oxide powder. 20 parts by weight of crushed aluminosilicate fibers, 9 parts by weight of sericite clay, and 9 parts by weight of titanium oxide were pasted with polyvinyl alcohol. Plug raw material B was made by similarly making a paste of plug raw material A, aluminosilicate fiber 20 parts by weight, and 15 parts by weight of sericite clay.The seam hA obtained above was divided into two parts, one of which was shaped like a gear. A corrugate machine with rolls is used to shape the bottom of the corrugate, and while one plug raw material is injected into one end, an adhesive obtained by kneading crushed aluminosilicate fibers and sericite clay with an organic glue is applied to the top of the corrugate. and attach the other flat sheet. The above adhesive is applied to the top of the corrugate of the cardboard-shaped molded body obtained here, and the other plug raw material is injected into the other end, rolled up into a cylindrical shape on the core, and the outer periphery is sealed. A honeycomb-shaped molded body was obtained by wrapping more than one layer of hB.This molded body is a honeycomb cell Q.One end on the exhaust gas inflow side is sealed with plug raw material A, and the other end is open and the other end is the outflow side of the adjacent cell. It has a structure sealed with plug material B. - Plug raw material A is placed at the inlet end of the core.
When this is filled and fired in an electric furnace at 1250°C for 2 hours, the organic matter is burnt out, and the aluminosilicate fibers, sericite clay, and titanium oxide particles are sintered together to form a ceramic filter with a fiber-ceramic honeycomb structure. The material that makes up this filter has a porosity of 7.
3%, and the heat capacity at room temperature is small depending on the porosity.This example is shown in perspective in FIG. 1, and in FIG. 2, a schematic cross-sectional view is shown. Reference numeral 1a designates an exhaust gas filter, in which a ceramic sheet is formed into a corrugated honeycomb shape, and one end of the cell 2 is filled with an inlet plug 3 compounded with titanium oxide, and the other end is filled with an outflow plug 4, and the outer periphery contains titanium oxide. Fiber ceramic (high dielectric constant part 5)
covered with. The center part is the part of the core 6 during winding, and is filled with inflow side plug material.
この排ガスフィルタ１ａを第３図に示す再生システムに
装着した 排ガスフィルタ１ａＬＬ、 アルミノシリ
ケート繊維からなる断熱クツション材１０で外周を覆わ
れてケース１１に収納されており、ケース１１の排ガス
流入側にもうけられた流入室Ｘ２にはエアポンプ１３か
らの空気を供給するエアパイプ１４が開口し マイクロ
波発振器１５と接続された導波管１６が開口しており、
さらに排ガスを遮断してバイパス１７へ導くパルプ１８
を有する排ガス導入管１９が接続されている。他方、流
出側にはマイクロ波遮蔽板２０を有する排出管２１が開
口している排気室２２が接続されている。This exhaust gas filter 1a is installed in the regeneration system shown in FIG. An air pipe 14 for supplying air from an air pump 13 is opened in the inlet chamber X2, and a waveguide 16 connected to a microwave oscillator 15 is opened.
Pulp 18 further blocks exhaust gas and guides it to bypass 17
An exhaust gas introduction pipe 19 having a diameter is connected thereto. On the other hand, an exhaust chamber 22 in which an exhaust pipe 21 having a microwave shielding plate 20 opens is connected to the outflow side.
バイパス１７は排出管２１の途中に接続され開口してい
る。この再生システムで（よ 排ガスは通家排ガス導入
管１９から流入室１２へ入り、排ガスフィルタ１ａでパ
ーティキュレートを除去されて排気室２２から排出管２
１を経て大気に放出される。排ガスフィルター１ａにパ
ーティキュレートが一定量堆積すると、バルブ１８が作
動して排ガスをバイパス１７へ流すと時に流入室１２側
を遮断する。続いてエアポンプ１３が作動して流入室１
２にパーティキュレート燃焼用の空気を一定流量で送り
込む。一方、マイクロ波発振器１５も作動して導波管１
６を通してマイクロ波を排ガスフィルタｌａに照射する
。これにより、フィルタ１９−
０−
ａ中央付近ではパーティキュレート自身の発熱で焼却か
始まる。また、排ガスフィルタ１ａの流入側プラグ３及
び外周５では酸化チタンの複合化で高誘電率となってい
るためマイクロ波照剖によって発熱する。この熱が外周
から伝熱され 従来焼却されないで残っていた流入側端
面およびその周辺と外周部分のパーティキュレートは焼
却され完全な排ガスフィルタの再生を行なわせることか
できた また クラックの発生もみられず安全に再生を
繰り返すことができた
本実施例で（よ 空気を供給してパーティキュレートを
燃焼させるがこの空気によってフィルターの流入側端部
は冷却されるにもかかわらすミ 酸化チタンを含んだプ
ラグの発熱によって端面および端部に堆積したパーティ
キュレートをも完全に焼却できるものであった
〈実施例２〉
実施例１で調整したアルミノシリケート繊維、セリザイ
ト粘土等を配合し凝集させた懸濁液を懸濁液Ａとする。The bypass 17 is connected to the middle of the discharge pipe 21 and is open. In this regeneration system, exhaust gas enters the inlet chamber 12 from the exhaust gas inlet pipe 19, particulates are removed by the exhaust gas filter 1a, and then from the exhaust chamber 22 to the exhaust pipe 2.
1 and then released into the atmosphere. When a certain amount of particulates are deposited on the exhaust gas filter 1a, the valve 18 is activated to allow the exhaust gas to flow to the bypass 17, while blocking the inflow chamber 12 side. Subsequently, the air pump 13 operates and the inflow chamber 1
Air for particulate combustion is fed into 2 at a constant flow rate. On the other hand, the microwave oscillator 15 also operates and the waveguide 1
6 to irradiate the exhaust gas filter la with microwaves. As a result, incineration begins near the center of the filter 19-0-a due to the heat generated by the particulates themselves. In addition, the inflow side plug 3 and the outer periphery 5 of the exhaust gas filter 1a have a high dielectric constant due to the combination of titanium oxide, and therefore generate heat when exposed to microwave radiation. This heat was transferred from the outer periphery, and the particulates on the inlet end face, its surroundings, and the outer periphery, which had not been incinerated in the past, were incinerated, resulting in complete regeneration of the exhaust gas filter.Also, no cracks were observed. In this example, we were able to safely repeat the regeneration (as shown in Fig. 2). Air was supplied to burn the particulates, but even though this air cooled the inlet end of the filter, the plug containing titanium oxide It was possible to completely incinerate the particulates that had accumulated on the end face and edges due to the heat generated. Example 2 A suspension in which aluminosilicate fibers, cerizite clay, etc. prepared in Example 1 were blended and aggregated. Let it be called suspension A.
他方、アルミノシリケート繊維２１
０重量数 セリザイト粘土１０重量敵 酸化チタン６重
量部を配合Ｌ 凝集させた懸濁液をＢとする。長網式抄
紙機にこれら懸濁液Ａ、 Ｂをそれぞれ供給できるよ
うにバルブを設けておく。この抄紙機において、まず懸
濁液Ｂを排ガスフィルタの外側から３周目までを構成す
る長さのシートを抄紙したのち続けて両バルブを徐々に
切り換えながらＰａ濁液Ａを送って抄紙し 排ガスフィ
ルター１個分を抄紙した後再び懸濁液Ｂに切り換える操
作を繰り返し行なっｆ、 このシート（よ 一定区間
に酸化チタンを含有するもので含有量は抄紙方向に徐々
に変化している。コルゲート用シート、平板用シートの
２種類を準備して実施例１と同様にプラグ原料Ａ、
Ｂを用いて排ガスフィルター１ｂを製造し起
これらのシートから作られる排ガスフィルタ１ｂは外周
から３層目まで（高誘電率部分７）と流入側プラグ３か
酸化チタンを含んだ高誘電率材料で構成されている。酸
化チタンの含有量は外周で最も多く、 ３層目にかけて
徐々に減っている。ま］２−
た−１−記製造過程で懸濁液Ａ、Ｂのバルブを瞬時に切
り換えると、酸化チタンの含有量がデジタル的に変化す
るシートが作成できた さらに 酸化チタンの（ｔ
チタン酸ストロンチウムやチタン酸カルシウムなどのチ
タン酸塩を用いる場合でも同様の方法で複合することが
でき、高い誘電率の材料が得られた
この排ガスフィルタを用いて実施例１と同じ実験を行な
ったとこ水 流入側端部及び外周付近のパーティキュレ
ートは完全に焼却されており、フィルター内に発生する
温度勾配も実施例１よりも小さくなっていた したがっ
てより効果的に信頼寿命の長い再生システムを構成する
ことが可能となった
なお、上記各実施例における繊維セラミック焼結体（よ
繊維セラミックが積層した構造の多孔質セラミックで
あり、６０〜８０％の気孔率であって熱容量か著しく小
さい特性を有している。したかって、この材料に高誘電
率の材料を複合することで繊維セラミックの特性を損な
うことなく、マイクロ波照射によって容易に高温を得る
ことが可能である。On the other hand, 210 parts by weight of aluminosilicate fibers, 10 parts by weight of cerizite clay, and 6 parts by weight of titanium oxide were blended into L. The agglomerated suspension was designated as B. Valves are provided so that these suspensions A and B can be supplied to the fourdrinier paper machine. In this paper machine, first, paper is made using suspension B to form a sheet with a length that constitutes the third rotation from the outside of the exhaust gas filter, and then paper is made by feeding Pa suspension A while gradually switching both valves. After making paper for one filter, the operation of switching to suspension B was repeated, and this sheet (containing titanium oxide in a certain area, the content gradually changing in the paper making direction) was used for corrugating. Two types of sheets, a sheet and a flat plate sheet, were prepared and plug raw material A,
The exhaust gas filter 1b made from these sheets is made of a high dielectric constant material containing titanium oxide from the outer periphery to the third layer (high dielectric constant portion 7) and the inlet side plug 3. It is configured. The content of titanium oxide is highest at the outer periphery and gradually decreases toward the third layer. 2-Ta-1-During the manufacturing process, by instantaneously switching the valves for suspensions A and B, we were able to create a sheet in which the content of titanium oxide changed digitally.
Even when titanates such as strontium titanate and calcium titanate are used, they can be composited using the same method, and a material with a high dielectric constant was obtained. Using this exhaust gas filter, the same experiment as in Example 1 was conducted. The particulates near the inflow end and the outer periphery of the water were completely incinerated, and the temperature gradient generated within the filter was also smaller than in Example 1. Therefore, a regeneration system with a more effective and longer reliable life was constructed. The fiber ceramic sintered body in each of the above examples is a porous ceramic with a structure in which fiber ceramics are laminated, and has a porosity of 60 to 80% and a significantly small heat capacity. Therefore, by combining this material with a material having a high dielectric constant, it is possible to easily obtain a high temperature by microwave irradiation without impairing the properties of the fiber ceramic.
発明の効果
本発明によれ（よ 酸化唸 炭化１扱 チタン酸塩など
で誘電率の高い化合物を、排ガスフィルタの外周部分、
外周から数層のハニカムを構成することで、マイクロ波
照射によってパーティキュレトを焼却する構成の排ガス
フィルタであるので、特に外周付近での焼却が促進され
再生率を向」二させることができ、再生をより完全なも
のとすることができる。また再生中にフィルタ内に発生
ずる温度勾配を小さく抑制でき、熱応力も小さなものと
なり、長期間にわたって信頼性が高く安定した効率のよ
いパーティキュレート除去性能を保証できる。Effects of the Invention According to the present invention, a compound with a high dielectric constant such as titanate is added to the outer peripheral part of the exhaust gas filter,
By configuring several layers of honeycomb from the outer periphery, this exhaust gas filter is configured to incinerate particulates by microwave irradiation, so incineration is particularly promoted near the outer periphery and the regeneration rate can be improved. Regeneration can be made more complete. Furthermore, the temperature gradient that occurs within the filter during regeneration can be suppressed to a small level, and thermal stress can also be reduced, ensuring highly reliable, stable, and efficient particulate removal performance over a long period of time.
第１図は本発明の一実施例の排ガスフィルタ構成は 第
２図は同実施例の排ガスフィルタの構成＠ 第３図は同
排ガスフィルタを組み込んだ排ガスフィルタ装置の概略
構成阻 第４図は本発明の３−
４
異なる実施例の排ガスフィルタの概略断面図である。Figure 1 shows the configuration of an exhaust gas filter according to an embodiment of the present invention. Figure 2 shows the configuration of an exhaust gas filter according to the same embodiment. Figure 3 shows the schematic configuration of an exhaust gas filter device incorporating the same exhaust gas filter. FIG. 3-4 is a schematic cross-sectional view of an exhaust gas filter according to a different embodiment of the invention.
Claims (6)
板と接着したものを、積層もしくは巻き上げ、焼成によ
って一体化して得られるセラミック製コルゲートハニカ
ム構造の、隣接するセル端部を交互にプラグして構成し
、外周部あるいは外周から数層のハニカムを高誘電率に
構成したことを特徴とする排ガスフィルタ。(1) A ceramic corrugated honeycomb structure is obtained by laminating or rolling up one ceramic sheet, which is made into a corrugated sheet, and the other is bonded to a flat sheet, and then baked to integrate the ceramic sheets. Adjacent cell ends are alternately plugged. 1. An exhaust gas filter characterized in that the outer periphery or several layers of honeycomb from the outer periphery are formed with a high dielectric constant.
板と接着したものを、積層もしくは巻き上げ、焼成によ
って一体化して得られるセラミック製コルゲートハニカ
ム構造の、隣接するセル端部を交互にプラグして構成し
た排ガスフィルタであつて、外周部に向けて誘電率が漸
増することを特徴とする排ガスフィルタ。(2) A ceramic corrugated honeycomb structure is obtained by laminating or rolling up one ceramic sheet with a corrugated one and bonding it to the other flat plate, and then firing to integrate the ceramic sheet. Adjacent cell ends are alternately plugged. What is claimed is: 1. An exhaust gas filter having a structure in which the dielectric constant gradually increases toward the outer periphery.
化させたものであることを特徴とする請求項１または２
記載の排ガスフィルタ。(3) Claim 1 or 2, characterized in that it is a composite of a ceramic sheet and a material with a high dielectric constant.
Exhaust gas filter listed.
ケート繊維、アルミナ繊維、アルミノボロシリケート繊
維等の耐熱性無機繊維とセラミック原料粉末から成るこ
とを特徴とする請求項３記載の排ガスフィルタ。(4) The exhaust gas filter according to claim 3, wherein the ceramic sheet is made of heat-resistant inorganic fibers such as silica fibers, aluminosilicate fibers, alumina fibers, and aluminoborosilicate fibers and ceramic raw material powder.
ロンチウム等の炭化物、酸化物、チタン酸塩等を複合す
ることを特徴とする請求項３記載の排ガスフィルタ。(5) The exhaust gas filter according to claim 3, characterized in that it is a composite of carbides, oxides, titanates, etc. such as silicon carbide, titanium oxide, zinc oxide, and strontium titanate.
形状であることを特徴とする請求項５記載の排ガスフィ
ルタ。(6) The exhaust gas filter according to claim 5, wherein the composite carbide or oxide is in the form of whiskers or fibers.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2073739A JPH03275110A (en) | 1990-03-23 | 1990-03-23 | Exhaust gas filter |
| CA 2036854 CA2036854A1 (en) | 1990-02-23 | 1991-02-21 | Exhaust filter element and exhaust gas-treating apparatus |
| AU71324/91A AU624037B2 (en) | 1990-02-23 | 1991-02-22 | Exhaust filter element and exhaust gas-treating apparatus |
| DE1991601936 DE69101936T2 (en) | 1990-02-23 | 1991-02-23 | Filter element and device for cleaning exhaust gases. |
| EP19910102679 EP0443625B1 (en) | 1990-02-23 | 1991-02-23 | Exhaust filter element and exhaust gas-treating apparatus |
| US07/853,899 US5194078A (en) | 1990-02-23 | 1992-03-19 | Exhaust filter element and exhaust gas-treating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2073739A JPH03275110A (en) | 1990-03-23 | 1990-03-23 | Exhaust gas filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03275110A true JPH03275110A (en) | 1991-12-05 |
Family
ID=13526912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2073739A Pending JPH03275110A (en) | 1990-02-23 | 1990-03-23 | Exhaust gas filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03275110A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002000323A1 (en) * | 2000-06-23 | 2002-01-03 | Cummins Inc. | Filter element with discrete heat generators and method of manufacture |
| US7033452B2 (en) * | 2002-11-08 | 2006-04-25 | Ngk Insulators, Ltd. | Method for plugging a cell of a honeycomb structure and method for manufacturing a honeycomb plugged structure |
| JP2009240863A (en) * | 2008-03-28 | 2009-10-22 | Nippon Spindle Mfg Co Ltd | Filter apparatus |
| JP2011041942A (en) * | 2009-08-19 | 2011-03-03 | Baldwin Filters Inc | Collapsible core, filter and method |
-
1990
- 1990-03-23 JP JP2073739A patent/JPH03275110A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002000323A1 (en) * | 2000-06-23 | 2002-01-03 | Cummins Inc. | Filter element with discrete heat generators and method of manufacture |
| US6379407B1 (en) * | 2000-06-23 | 2002-04-30 | Cummins Inc. | Filter element with discrete heat generators and method of manufacture |
| US7033452B2 (en) * | 2002-11-08 | 2006-04-25 | Ngk Insulators, Ltd. | Method for plugging a cell of a honeycomb structure and method for manufacturing a honeycomb plugged structure |
| JP2009240863A (en) * | 2008-03-28 | 2009-10-22 | Nippon Spindle Mfg Co Ltd | Filter apparatus |
| JP2011041942A (en) * | 2009-08-19 | 2011-03-03 | Baldwin Filters Inc | Collapsible core, filter and method |
| US9174160B2 (en) | 2009-08-19 | 2015-11-03 | Baldwin Filters, Inc. | Collapsible core, filter, and method |
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