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公开(公告)号：US10316717B2
公开(公告)日：2019-06-11
申请号：US15458070
申请日：2017-03-14
申请人： NGK INSULATORS, LTD.
发明人： Takuya Ishihara , Yoshimasa Omiya , Katsumi Saiki
摘要： A reducing agent injection device includes a honeycomb structure and a urea spraying device spraying a urea water solution in mist form. A pair of electrode members is formed in the honeycomb structure. The honeycomb structure of the reducing agent injection device, the hydraulic diameter HD, defined as HD=4×S/C, when the area of the cross section of one of the cells in the cross section perpendicular to the cell extending direction is S, and the peripheral length of the cross section of one of the cells is C, is 0.8 to 2.0 mm. Also, the open frontal area OFA of the honeycomb structure in the cross section perpendicular to the cell extending direction is 45 to 80%.
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2.发明授权公开(公告)号：US09759106B2
公开(公告)日：2017-09-12
申请号：US14856659
申请日：2015-09-17
申请人： NGK Insulators, Ltd.
发明人： Yoshiyuki Kasai , Kazumi Mase , Katsumi Saiki
CPC分类号： F01N3/0222 , B01D53/90 , B01D53/9431 , B01D53/9477 , B01D2251/2067 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/20723 , B01D2255/50 , B01D2257/404 , B01D2257/406 , B01D2257/502 , B01D2257/702 , B01J27/224 , B01J35/04 , F01N3/2026 , F01N3/2066 , F01N3/208 , F01N3/2842 , F01N2240/16 , F01N2240/40 , F01N2330/30 , F01N2610/02 , F01N2610/10 , F01N2610/105 , F01N2610/1453 , F01N2610/146 , Y02T10/24
摘要： A reducing agent injection device includes a honeycomb structure having a honeycomb structure body and a pair of electrode members arranged in a side surface of the honeycomb structure body and a urea spraying device spraying a urea water solution in mist form. The urea water solution sprayed from the urea spraying device is supplied inside cells from a first end face of the honeycomb structure body, and urea in the urea water solution supplied in the cells is heated and hydrolyzed inside the electrically heated honeycomb structure body to generate ammonia. The ammonia is discharged outside the honeycomb structure body from a second end face and injected outside. There is provided a reducing agent injection device that can generate and inject ammonia from a urea solution with less energy.
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公开(公告)号：US10519834B2
公开(公告)日：2019-12-31
申请号：US15458092
申请日：2017-03-14
申请人： NGK INSULATORS, LTD.
发明人： Katsumi Saiki , Yoshimasa Omiya , Takuya Ishihara
摘要： A reducing agent injection device includes a honeycomb structure and a urea spraying device spraying a urea water solution in mist form. In addition, the reducing agent injection device includes a carrier gas inlet that introduces carrier gas f between the urea spraying device and the honeycomb structure. The exhaust gas treatment method of the present invention supplies the urea water solution from the urea spraying device into the cells from the first end face of the honeycomb structure body to generate the ammonia, while introducing the carrier gas f from the carrier gas inlet, and injecting the ammonia to the outside to treat exhaust gas containing NOX.
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4.发明授权公开(公告)号：US11674425B2
公开(公告)日：2023-06-13
申请号：US17220999
申请日：2021-04-02
申请人： NGK INSULATORS, LTD.
发明人： Katsumi Saiki , Yukinari Shibagaki
CPC分类号： F01N3/2073 , F01N3/2013 , F01N3/2828 , F01N3/2066 , F01N2240/25 , F01N2330/06 , F01N2610/02 , F01N2610/1453
摘要： A reductant injecting device includes: a honeycomb structure comprising: a pillar shaped honeycomb structure portion having a partition wall that defines a plurality of cells each extending from a fluid inflow end face to a fluid outflow end face; and at least one pair of electrode portions arranged on a side surface of the honeycomb structure portion; an inner cylinder being configured to house the honeycomb structure; a urea sprayer arranged at one end of the inner cylinder; and an outer cylinder arranged on an outer peripheral side of the inner cylinder, the outer cylinder being spaced apart from the inner cylinder. A flow path through which the carrier gas passes is formed between the inner cylinder and the outer cylinder.
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5.发明授权公开(公告)号：US11555433B2
公开(公告)日：2023-01-17
申请号：US17301623
申请日：2021-04-09
申请人： NGK INSULATORS, LTD.
发明人： Katsumi Saiki , Yukinari Shibagaki
摘要： A reductant injecting device, including: a honeycomb structure including: a pillar shaped honeycomb structure portion having partition wall that defines a plurality of cells each extending from a fluid inflow end face to a fluid outflow end face; and at least one pair of electrode portions arranged on a side surface of the honeycomb structure portion; an outer cylinder having an inlet side end portion and an outlet side end portion, the inlet side end portion comprising a carrier gas introduction port being configured to introduce a carrier gas, the outlet side end portion comprising an injection port being configured to inject ammonia; a urea sprayer arranged at one end of the outer cylinder; and a spray direction switcher configured to be able to switch a spray direction of the aqueous urea solution.
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公开(公告)号：US10100694B2
公开(公告)日：2018-10-16
申请号：US15458082
申请日：2017-03-14
申请人： NGK INSULATORS, LTD.
发明人： Yoshimasa Omiya , Katsumi Saiki , Takuya Ishihara
摘要： A reducing agent injection device includes a first honeycomb structure and a urea spraying device spraying a urea water solution in mist form. A pair of electrode members is formed in the first honeycomb structure. The ratio L/D of length L in the cell extending direction of the honeycomb structure body to diameter D of the cross section perpendicular to the cell extending direction is 0.5 to 1.2. Also, it is preferable that a urea hydrolysis catalyzer is provided in the second end face side of the honeycomb structure body, with a gap from the second end face.
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公开(公告)号：US09820337B2
公开(公告)日：2017-11-14
申请号：US14496618
申请日：2014-09-25
申请人： NGK Insulators, Ltd.
发明人： Takeshi Sakuma , Katsumi Saiki
CPC分类号： H05B3/0004 , B01J35/04 , B29D99/0089 , B29L2022/007 , F01N3/2026 , F01N9/00 , Y02T10/26 , Y02T10/47
摘要： The heating method of honeycomb structure includes a heating step of supplying a power to a honeycomb structure body of a honeycomb structure including the tubular honeycomb structure body having porous partition walls to define and form a plurality of cells and a circumferential wall positioned at an outermost circumference, and heating by electricity conduction, and a catalyst loaded onto the partition walls of the honeycomb structure body, to heat the honeycomb structure body up to a target temperature, and in the heating step, there is provided, at least once, a supply power decrease section where the supply of the power to the honeycomb structure body is stopped or the power to be supplied to the honeycomb structure body is decreased before the lowest temperature in a heating region of the honeycomb structure body reaches the target temperature.
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