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    • 2. 发明授权
    • Nitrogen oxide removal catalyst
    • 氧化氮去除催化剂
    • US5869419A
    • 1999-02-09
    • US871520
    • 1997-06-09
    • Yoshiaki ObayashiKozo IidaShigeru NojimaAtsushi MoriiOsamu Naito
    • Yoshiaki ObayashiKozo IidaShigeru NojimaAtsushi MoriiOsamu Naito
    • B01D53/86B01D53/94B01D53/96B01J23/30B01J37/02B01J38/00B01J23/00B01J8/00B01J23/16
    • B01J38/00B01D53/8628B01D53/8631B01J23/30B01J37/0244
    • This invention effectively utilizes a solid type honeycomb-shaped NO.sub.x removal catalyst which has been used in a catalytic ammonia reduction process and hence reduced in NO.sub.x removal power, and thereby provides an inexpensive catalyst having NO.sub.x removal power equal to that of a fresh catalyst. The nitrogen oxide removal catalyst of this invention, which is useful in a process wherein ammonia is added to exhaust gas and nitrogen oxides present in the exhaust gas are catalytically reduced, has a two-layer structure composed of a lower layer comprising a spent solid type nitrogen oxide removal catalyst and an upper layer comprising a fresh TiO.sub.2 -WO.sub.3 -V.sub.2 O.sub.5 ternary or TiO.sub.2 -WO.sub.3 binary catalyst powder which has been applied to the lower layer so as to give a coating thickness of 100 to 250 .mu.m. Moreover, the catalyst power constituting the upper layer is a catalyst powder obtained by pulverizing a spent solid type nitrogen oxide removal catalyst.
    • 本发明有效地利用了催化氨还原方法中使用的固体型蜂窝状NOx去除催化剂,从而降低了NOx去除能力,从而提供了具有等于新鲜催化剂的NOx去除功率的便宜的催化剂。 本发明的氮氧化物去除催化剂可用于将排放气体中存在氨和排出气体中存在的氮氧化物的方法进行催化还原的方法中,具有由下层构成的二层结构,该下层由废固体型 氮氧化物去除催化剂和上层,其包含新的TiO 2 -WO 3-V 2 O 5三元或TiO 2 -WO 3二元催化剂粉末,其被施加到下层以使涂层厚度为100-250μm。 此外,构成上层的催化剂功率是通过粉碎废固体型氮氧化物去除催化剂而获得的催化剂粉末。
    • 7. 发明授权
    • Rectifying device
    • 整流装置
    • US5680884A
    • 1997-10-28
    • US639999
    • 1996-04-30
    • Shigeyuki NishijimaMasaaki TaniguchiAtsushi MoriiOsamu Naito
    • Shigeyuki NishijimaMasaaki TaniguchiAtsushi MoriiOsamu Naito
    • F15D1/02B01D53/34B01F5/06B01J19/24B01J19/32
    • B01J19/32B01F5/061B01F5/0614B01J19/24B01J2219/00072B01J2219/32286B01J2219/32293B01J2219/32296B01J2219/326
    • A high-performance rectifying device promotes the diffusion of energy, temperature and concentration in a fluid stream with a small pressure loss. The device is a lattice type rectifying device provided within a fluid flow passageway for equalizing the flow velocity distribution of the same fluid. Lattice elements each consist of two triangular plates disposed so as to form two opposed surfaces of a pyramid having its apex on the downstream side of the fluid flow and two other triangular plates forming two opposed surfaces of another pyramid having its apex jointed with the first-mentioned apex and having its bottom surface positioned on the downstream side of the fluid flow. The latter two opposed surfaces have their orientations deviated by 90 degrees from the two opposed surfaces on the upstream side. The lattice elements are arrayed in juxtaposition in directions perpendicular to the fluid flow with the orientation of adjacent lattice elements deviated by 90 degrees from each other and are connected in such a manner that the bottom surfaces of the above-mentioned pyramids may form a lattice. Furthermore the ratio of the length, in a direction parallel to the flow, of the lattice element to the breadth, in the direction perpendicular to the flow, of the lattice element should be kept in a range of 1.5-2.0. The lattice element may also be formed of a rectangular plate twisted by 90 degrees in the direction along the direction of the fluid flow.
    • 高性能整流装置促进能量,温度和浓度在流体流中的扩散,压力损失小。 该装置是设置在流体流动通道内用于均衡相同流体的流速分布的格子式整流装置。 晶格元件由两个三角形板组成,两个三角形板被设置成在流体流动的下游侧形成具有顶点的金字塔的两个相对表面,另外两个三角形板形成另一个金字塔的相对表面,其另一个金字塔的顶点与第一 - 并且其底表面位于流体流的下游侧。 后两个相对的表面具有从上游侧的两个相对表面偏离90度的方向。 晶格元素在垂直于流体流动的方向上并列排列,其中相邻晶格元素的取向相互偏离90度,并以上述棱锥的底表面形成晶格的方式连接。 此外,在晶格元素的与流动方向垂直的方向上的平行于流动的方向上的晶格长度与宽度的比例应保持在1.5-2.0的范围内。 格子元件也可以由沿流体流动方向的方向扭转90度的矩形板形成。