IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0580506
(2004-11-24)
|
등록번호 |
US-7655064
(2010-03-31)
|
우선권정보 |
JP-2003-393879(2003-11-25); JP-2004-099149(2004-03-30) |
국제출원번호 |
PCT/JP2004/017395
(2004-11-24)
|
§371/§102 date |
20070126
(20070126)
|
국제공개번호 |
WO05/052327
(2005-06-09)
|
발명자
/ 주소 |
- Kato, Yasuyoshi
- Michimoto, Takashi
- Miyamoto, Eiji
- Imada, Naomi
- Fujisawa, Masatochi
- Kobayashi, Kazuki
- Ishizaka, Hiroshi
- Hirota, Takeshi
|
출원인 / 주소 |
- Babcock-Hitachi Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
1 |
초록
▼
A particulate matter-removing filter being resistant to clogging and ash blocking, requiring no special means such as back-washing and heating combustion, and being formed of inexpensive materials; and exhaust emission controlling method and device using this. (1) A particulate-matter-containing exh
A particulate matter-removing filter being resistant to clogging and ash blocking, requiring no special means such as back-washing and heating combustion, and being formed of inexpensive materials; and exhaust emission controlling method and device using this. (1) A particulate-matter-containing exhaust emission controlling filter which uses as a basic unit a pair of porous corrugated sheet and a porous flat sheet that support an exhaust emission controlling catalyst, has a molding formed by laminating the porous corrugated sheets so that their ridge lines alternately cross perpendicularly, has one of side surfaces, perpendicularly crossing the corrugated sheet ridge lines, of the molding or mutually-adjoining two surfaces that are the perpendicularly-crossing side surfaces sealed, and has exhaust gas in-flow passage and out-flow passage respectively formed between porous corrugated sheets via a porous flat sheet. (2) A filter having the exhaust emission controlling catalyst that is an oxidizing catalyst for oxidizing nitrogen monoxide in an exhaust gas.
대표청구항
▼
The invention claimed is: 1. A filter for purifying an exhaust gas containing particulate matter and nitrogen monoxide, comprising: a molding formed by stacking up pairs of a porous corrugated plate and a porous flat plate such that the ridge lines of the porous corrugated plates alternately cross
The invention claimed is: 1. A filter for purifying an exhaust gas containing particulate matter and nitrogen monoxide, comprising: a molding formed by stacking up pairs of a porous corrugated plate and a porous flat plate such that the ridge lines of the porous corrugated plates alternately cross perpendicularly, and either one side surface or two mutually-adjoining surfaces of the molding are sealed, and perpendicularly-crossing said porous corrugated plate ridge lines so that exhaust gas in-flow passages and exhaust gas out-flow passages are respectively formed between said porous corrugated plates via the porous flat plates; and wherein an exhaust gas purifying catalyst is supported on the porous corrugated plates and the porous flat plates to form said exhaust gas in-flow passages, said catalyst being an oxidizing catalyst which oxidizes nitrogen monoxide in the exhaust gas to nitrogen dioxide which then oxidizes the particulate matter deposited on the porous flat plates to carbon dioxide and nitrogen monoxide, wherein the nitrogen monoxide further reacts with nitrogen dioxide and ammonia to produce nitrogen gas and water. 2. The filter according to claim 1, wherein said oxidizing catalyst contains platinum. 3. The filter according to claim 2, wherein said oxidizing catalyst contains titanium oxide. 4. The filter according to claim 1, wherein said oxidizing catalyst contains titanium oxide. 5. The filter according to claim 1 comprising a means for introducing exhaust gas into said exhaust gas in-flow passage of the filter and a means for interrupting the passage of the gas discharged from said out-flow passage. 6. The filter according to claim 5, wherein said means for interrupting the passage of the gas has a structure having the switching function of permitting or interrupting the passage of the gas. 7. A filter for purifying an exhaust gas containing particulate matter and nitrogen monoxide comprising: a molding formed by stacking up pairs of a porous corrugated plate and a porous flat plate such that the ridge lines of the porous corrugated plates alternately cross perpendicularly, and either one side surface or two mutually-adjoining surfaces of the molding are sealed and, perpendicularly crossing said corrugated plate ridge lines so that exhaust gas in-flow passages and exhaust gas out-flow passages are respectively formed between said porous corrugated plates through said porous flat plates, and wherein an oxidizing catalyst that oxidizes nitrogen monoxide is supported on both surfaces of the porous corrugated plate and on one surface of the porous flat plate which is in contact with the porous corrugated plate, forming the exhaust gas in-flow passage, and said oxidizing catalyst is supported on neither both surfaces of the porous corrugated plate nor one surface of the porous flat plate in contact with the porous corrugated plate, forming the exhaust gas out-flow passage, wherein the catalyst oxidizes nitrogen monoxide in the exhaust gas to nitrogen dioxide which then oxidizes the particulate matter deposited on the porous flat plates to carbon dioxide and nitrogen monoxide, wherein the nitrogen monoxide further reacts with nitrogen dioxide and ammonia to produce nitrogen gas and water. 8. The filter according to claim 7, wherein said oxidizing catalyst contains platinum. 9. The filter according to claim 8, wherein said oxidizing catalyst contains titanium oxide. 10. The filter according to claim 7, wherein said oxidizing catalyst contains titanium oxide. 11. The filter according claim 7, a means for introducing exhaust gas into said exhaust gas in-flow passage of the filter and a means for interrupting the passage of the gas discharged from said out-flow passage are provided. 12. The filter according to claim 11, wherein said means for interrupting the passage of the gas has a structure having the switching function of permitting or interrupting the passage of the gas. 13. A particulate matter-containing exhaust gas purifying method using the filter according to claim 1, comprising introducing the exhaust gas into said filter from the passage along the ridge line of the corrugated plate which passage is formed between the porous corrugated plate and porous flat plate of the molded body, allowing the gas cleaned in the passage to pass through the porous flat plate and the porous corrugated plate, and then discharging the gas from adjacent passages along the ridge lines of adjacent corrugated plates which passages are formed between porous flat plates and the porous corrugated plates and crossed at right angles with said passage along the ridge line of the corrugated plate. 14. A particulate matter-containing exhaust gas purifying method using the filter according to claim 2, comprising introducing the exhaust gas into said filter from the passage along the ridge line of the corrugated plate which passage is formed between the porous corrugated plate and porous flat plate of the molded body, allowing the gas cleaned in the passage to pass through the porous flat plate and the porous corrugated plate, and then discharging the gas from adjacent passages along the ridge lines of adjacent corrugated plates which passages are formed between porous flat plates and the porous corrugated plates and crossed at right angles with said passage along the ridge line of the corrugated plate. 15. A particulate matter-containing exhaust gas purifying method using the filter according to claim 4, comprising introducing the exhaust gas into said filter from the passage along the ridge line of the corrugated plate which passage is formed between the porous corrugated plate and porous flat plate of the molded body, allowing the gas cleaned in the passage to pass through the porous flat plate and the porous corrugated plate, and then discharging the gas from adjacent passages along the ridge lines of adjacent corrugated plates which passages are formed between porous flat plates and the porous corrugated plates and crossed at right angles with said passage along the ridge line of the corrugated plate. 16. A particulate matter-containing exhaust gas purifying method using the filter according to claim 7, comprising introducing the exhaust gas into said filter from the passage along the ridge line of the corrugated plate which passage is formed between the porous corrugated plate and porous flat plate which support the oxidizing catalyst in the molded body, and discharging the gas cleaned in the molded body from the passage along the ridge line of an adjacent corrugated plate which passage is formed between the porous plate and porous corrugated plate supporting no catalyst and which crosses perpendicularly with the passage of the ridge line of the corrugated plate.
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