CN107489497A - 过滤面积大的梯形陶瓷蜂窝载体 - Google Patents

过滤面积大的梯形陶瓷蜂窝载体 Download PDF

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CN107489497A
CN107489497A CN201610401836.1A CN201610401836A CN107489497A CN 107489497 A CN107489497 A CN 107489497A CN 201610401836 A CN201610401836 A CN 201610401836A CN 107489497 A CN107489497 A CN 107489497A
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stomata
next door
filter area
ceramic honeycomb
honeycomb carrier
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华国金
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JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
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JIANGYIN HUAYIN CERAMIC ELECTROMECHANICAL TECHNOLOGY Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/033Exhaust 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 in combination with other devices
    • F01N3/035Exhaust 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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/022Exhaust 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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222Exhaust 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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00Structure of catalyst support or particle filter
    • F01N2330/06Ceramic, e.g. monoliths
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/10Carbon or carbon oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/12Hydrocarbons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14Nitrogen oxides

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

本发明涉及一种过滤面积大的梯形陶瓷蜂窝载体。它包括截面呈梯形的柱状本体,柱状本体沿轴线方向密布有气孔(1),气孔(1)的一端为开口(6),另一端设置有封堵面(2),封堵面(2)和开口(6)间隔布置,气孔(1)为方孔,气孔(1)的内壁为波纹形相邻两个气孔(1)设置有隔壁(3),隔壁(3)上开有呈蜂窝状的微孔(4),隔壁(3)上涂覆有催化剂涂层(7)。本发明一种过滤面积大的梯形陶瓷蜂窝载体,整体性好,在有限空间内最大限度的增加过滤面积,并且安装方便,净化效果好;隔壁上的微孔能有效过滤废气中的黑烟颗粒,并在催化剂涂层的作用下黑烟颗粒会被燃烧掉,进一步提高了尾气净化效果。

Description

过滤面积大的梯形陶瓷蜂窝载体
技术领域
本发明涉及一种过滤面积大的梯形陶瓷蜂窝载体,用于汽车尾气净化。属于陶瓷加工设备技术领域。
背景技术
目前,国内外通畅应用的汽车尾气净化器,其催化剂载体一般都采用陶瓷蜂窝载体,此载体是以合成堇青石原料加入粘合剂、烧失剂,经混合拌料、练泥、挤出、干燥、烧结,然后浸渍催化剂再干燥制得。使用时,放入尾气净化器金属外壳中段。
常规的陶瓷蜂窝载体一般为方形柱体,而将此种形状的陶瓷蜂窝载体装入尾气净化器的金属外壳中时,往往会造成陶瓷蜂窝载体与金属外壳之间的空隙大,使得尾气净化器不能有效利用汽车底盘的空间,而有的厂家为了填补空隙,会在空隙处添加小规格的陶瓷蜂窝载体,这会造成金属壳内的陶瓷蜂窝载体的整体性差,增加尾气处理过程中的阻力,降低了尾气净化效果,并且蜂窝载体在安装时,操作复杂,效率低;同时此种蜂窝载体的气孔为直通孔,对含有黑烟颗粒的废气净化效果差;现有的蜂窝载体的孔型为圆孔,圆孔的内壁是平直的,因此过滤面积小。
发明内容
本发明的目的在于克服上述不足,提供了一种过滤面积大的梯形陶瓷蜂窝载体,此陶瓷蜂窝载体整体性好、过滤面积大、净化效果好且安装方便。
本发明的目的是这样实现的:
一种过滤面积大的梯形陶瓷蜂窝载体,包括柱状本体,特点是:所述柱状本体的截面呈梯形,所述柱状本体包括第一圆弧边、第二圆弧边、第一斜边和第二斜边,所述第一圆弧边、第二斜边、第二圆弧边和第一斜边依次首尾相连,相连处采用圆角过渡,所述柱状本体沿轴线方向密布有气孔,所述气孔的一端为开口,另一端设置有封堵面,所述封堵面和开口间隔布置,所述相邻两个气孔设置有隔壁,隔壁上开有呈蜂窝状的微孔,隔壁上涂覆有催化剂涂层,所述气孔为方孔,气孔的内壁为波纹形。
本发明一种过滤面积大的梯形陶瓷蜂窝载体,其气孔的孔数为600孔/平方英寸。
本发明一种过滤面积大的梯形陶瓷蜂窝载体,其隔壁的厚度为0.13~0.14mm。
与现有技术相比,本发明的有益效果是:
本发明一种过滤面积大的梯形陶瓷蜂窝载体,整体性好,在有限空间内最大限度的增加过滤面积,并且安装方便,净化效果好;隔壁上的微孔能有效过滤废气中的黑烟颗粒,并在催化剂涂层的作用下黑烟颗粒会被燃烧掉,进一步提高了尾气净化效果。
附图说明
图1为本发明一种过滤面积大的梯形陶瓷蜂窝载体的截面示意图。
图2为本发明一种过滤面积大的梯形陶瓷蜂窝载体的部分轴向截面图。
图3为本发明的隔壁的结构示意图。
图4为图1的局部放大图。
图中:
气孔1,
封堵面2,
隔壁3,
微孔4,
尾气5,
开口6,
催化剂涂层7,
第一圆弧边8,
第二圆弧边9,
第一斜边10,
第二斜边11。
具体实施方式
参见图1-4,本发明涉及一种过滤面积大的梯形陶瓷蜂窝载体,它包括截面呈梯形的柱状本体,所述柱状本体包括第一圆弧边8、第二圆弧边9、第一斜边10和第二斜边11,所述第一圆弧边8、第二斜边11、第二圆弧边9和第一斜边10依次首尾相连,相连处采用圆角过渡,所述柱状本体沿轴线方向密布有气孔1,所述气孔1的一端为开口6,另一端设置有封堵面2,所述封堵面2和开口6间隔布置,所述气孔1为方孔,气孔1的内壁为波纹形,所述相邻两个气孔1设置有隔壁3,隔壁3上开有呈蜂窝状的微孔4,隔壁3上涂覆有催化剂涂层7。
其中,气孔1的孔数为600孔/平方英寸,隔壁3的厚度为0.13~0.14mm。
工作原理:本发明采用堇青石质制作成蜂窝陶瓷载体,并内置在柴油机尾气净化器内,柴油发动机排出的带有黑烟颗粒的废气从气孔1的开口6进入,由于气孔1在一端是开口6,而在另一端则是封堵面2,因此废气会通过带有微孔4的隔壁3,然后从相邻气孔1的开口6排出,由于黑烟颗粒的直径较微孔4大,因此废气中的黑烟颗粒将被过滤捕捉在隔壁3上,气流则从微孔4穿过。
所述催化剂涂层7含有贵金属的活性稀土,主要成份有Pt、Pd、Rh、Al2O3、Ce、La、Zr、Cu、Mn ,柴油燃烧的废气(主要为CO、HC、NOx等有害气体)穿过微孔4时,涂覆在隔壁3上的催化剂涂层7将增强CO、HC、NOx三种气体的活性,促使其进行一定的氧化-还原化学反应,其中CO在高温下氧化成无色无毒的二氧化碳气体,HC化合物在高温下分解成水(H2O)和二氧化碳,NOx还原成氮气和氧气。
当柴油机排气温度达到375 摄氏度时,在催化剂涂层7的作用下,隔壁3上的黑烟颗粒会逐步燃烧而氧化,黑烟颗粒的净化率约达到85% 以上,当反应温度达到500 摄氏度时催化剂和黑烟颗粒反应从而完全燃烧掉(催化燃烧),此时黑烟颗粒的净化率可达90% 以上。

Claims (3)

1.一种过滤面积大的梯形陶瓷蜂窝载体,包括柱状本体,其特征在于:所述柱状本体的截面呈梯形,所述柱状本体包括第一圆弧边(8)、第二圆弧边(9)、第一斜边(10)和第二斜边(11),所述第一圆弧边(8)、第二斜边(11)、第二圆弧边(9)和第一斜边(10)依次首尾相连,相连处采用圆角过渡,所述柱状本体沿轴线方向密布有气孔(1),所述气孔(1)的一端为开口(6),另一端设置有封堵面(2),所述封堵面(2)和开口(6)间隔布置,所述气孔(1)为方孔,气孔(1)的内壁为波纹形所述相邻两个气孔(1)设置有隔壁(3),隔壁(3)上开有呈蜂窝状的微孔(4),隔壁(3)上涂覆有催化剂涂层(7)。
2.根据权利要求1所述的一种过滤面积大的梯形陶瓷蜂窝载体,其特征在于:所述气孔(1)的孔数为600孔/平方英寸。
3.根据权利要求1或2所述的一种过滤面积大的梯形陶瓷蜂窝载体,其特征在于:所述隔壁(3)的厚度为0.13~0.14mm。
CN201610401836.1A 2016-06-12 2016-06-12 过滤面积大的梯形陶瓷蜂窝载体 Pending CN107489497A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356689A (zh) * 2017-12-27 2019-02-19 山东国瓷功能材料股份有限公司 一种抗热震非对称蜂窝陶瓷壁流式过滤器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109356689A (zh) * 2017-12-27 2019-02-19 山东国瓷功能材料股份有限公司 一种抗热震非对称蜂窝陶瓷壁流式过滤器
US11454150B2 (en) 2017-12-27 2022-09-27 Shandong Sinocera Functional Material Co., Ltd Thermal shock resistant and asymmetric honeycomb ceramic wall-flow filter

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