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    • 4. 发明专利
    • Ceramic honeycomb filter
    • 陶瓷蜂窝过滤器
    • JPS5742317A
    • 1982-03-09
    • JP11773780
    • 1980-08-28
    • Ngk Insulators Ltd
    • HIGUCHI NOBORUYANO AKIOOONISHI TSUGIHIRO
    • B01D46/00B01D29/11B01D39/20B01D46/24F01N3/28
    • F01N3/2828B01D29/111B01D29/31B01D29/52B01D46/2407B01D2201/46F01N2330/06Y10S55/30Y10T428/24157
    • PURPOSE:To raise the removing efficiency of fine particles present in waste gas by designating the amount of CaO contained in alumina cement used as a sealing material for the ends of the through holes of a ceramic honeycomb filter at 27wt% or less. CONSTITUTION:For a ceramic honeycomb filter in which the end parts of the through holes 2 at given positions of the honeycomb structrue are sealed up with an alumina cement as a sealing material 4, an alumina cement containing 27wt% or less CaO is used. When an aggregate is preferably further added to the alumina cement, a ceramic honeycomb filter which has a high corrosion resistance even at high temperatures of 1,200 deg.C or higher, heat resistance, high filtering capability, and high removing effect for fine dust particles in high-temperature exhaust gas from internal combustion engines can be obtained. Thus, when the ceramic honeycomb filter is placed before a catalyst for removal of CO, HC, NOx, etc., fine particles arrested by the filter are burned in high-temperature exhaust gas and the burning gas is arrested by the catalyst, so that no blinding of the filter occurs and the need for cleaning is eliminated.
    • 目的:通过指定在27重量%以下的陶瓷蜂窝过滤器的通孔的端部用作密封材料的氧化铝粘结剂中所含的CaO的量,来提高废气中存在的微粒的除去效率。 构成:对于蜂窝结构体的给定位置处的通孔2的端部用氧化铝水泥作为密封材料4密封的陶瓷蜂窝过滤器,使用含有27重量%以下的CaO的氧化铝水泥。 当聚合物优选进一步添加到氧化铝水泥中时,陶瓷蜂窝过滤器即使在1200℃或更高的高温下也具有高耐腐蚀性,耐热性,高过滤能力和对于细粉尘颗粒的高除去效果 可以获得来自内燃机的高温废气。 因此,当将陶瓷蜂窝过滤器放置在用于除去CO,HC,NOx等的催化剂之前,被过滤器堵塞的细小颗粒在高温废气中燃烧,并且燃烧气体被催化剂阻止,使得 不会发生过滤器的盲目,并且消除了对清洁的需要。