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CN107299848A - 排放标准高的汽车尾气净化器 - Google Patents

排放标准高的汽车尾气净化器 Download PDF

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Publication number
CN107299848A
CN107299848A CN201610233849.2A CN201610233849A CN107299848A CN 107299848 A CN107299848 A CN 107299848A CN 201610233849 A CN201610233849 A CN 201610233849A CN 107299848 A CN107299848 A CN 107299848A
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subtube
automobile exhaust
rose box
exhaust purifier
ceramic honeycomb
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华玉娣
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust 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
    • F01N3/022—Exhaust 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust 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
    • F01N3/022—Exhaust 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
    • F01N3/0222—Exhaust 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust 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
    • F01N3/023—Exhaust 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 using means for regenerating the filters, e.g. by burning trapped particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust 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
    • F01N3/033—Exhaust 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
    • F01N3/035—Exhaust 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/10—Carbon or carbon oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/12—Hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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

Abstract

本发明涉及一种排放标准高的汽车尾气净化器。它包括过滤箱（1），过滤箱（1）的包括位于上部的主管道（2）和下部有两个分叉的分管道（5），分管道（5）内设置有排气细管（4）和陶瓷蜂窝载体（3），过滤箱（1）的尾气出口处还设置有喷雾室（7）和选择性催化还原转化器（8）。本发明一种排放标准高的汽车尾气净化器，利用排气细管和陶瓷蜂窝载体两级过滤，将尾气反应成CO2、H2O，同时隔壁上的微孔能有效过滤废气中的碳烟颗粒，并在催化剂涂层的作用下碳烟颗粒会被燃烧掉，具有再生功能；采用主管道分流到分管道后，在有限的空间内增大了过滤面积，在选择性催化还原转化器内除去氮氧化合物，排放的尾气满足国V的标准。

Description

排放标准高的汽车尾气净化器
技术领域
本发明涉及一种排放标准高的汽车尾气净化器，用于汽车尾气净化。属于汽车设备技术领域。
背景技术
目前，普通的汽车尾气净化器，是使用催化剂与汽车尾气中的NO、NO2与CO反应，生成CO2和N2这两种无污染气体，但是配备柴油发动机的汽车，由于柴油发动机的尾气中含有碳烟颗粒，现有的汽车尾气净化器不能有效过滤碳烟颗粒，这样会造成环境污染；同时现有的净化器在有限的空间内由于不能保证很好的过滤面积，因此尾气净化不完全，排放后会污染环境；随着国V标准的逐步实施，由于上述的尾气中还存在大量的氮氧化物，因此现有的汽车尾气过滤装置已经不能满足要求。
发明内容
本发明的目的在于克服上述不足，提供了一种排放标准高的汽车尾气净化器，此汽车尾气净化器在高效过滤汽车尾气中的CO、HC、NOx有害气体的同时也能过滤碳烟颗粒，并在高温下碳烟颗粒会逐步燃烧而氧化，使得陶瓷蜂窝载体具有再生功能；并且在有限的空间内，增大了过滤面积，最后在选择性催化还原转化器的作用下，氮氧化物还原成氮气和水，满足国V标准。
本发明的目的是这样实现的：
一种排放标准高的汽车尾气净化器，包括过滤箱，其特征在于：所述过滤箱的包括位于上部的主管道和下部有两个分叉的分管道，所述两个分管道的轴心线与主管道的轴心线分别呈45°角，所述分管道内沿气流方向依次设置有排气细管和陶瓷蜂窝载体，所述陶瓷蜂窝载体与分管道的内壁相对应，且陶瓷蜂窝载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，所述相邻两个气孔之间设置有隔壁，隔壁上开有呈蜂窝状的微孔，隔壁上涂覆有催化剂涂层，所述过滤箱的尾气出口处还设置有喷雾室和选择性催化还原转化器，喷雾室内壁上设置有喷嘴，喷嘴喷射尿素溶液，选择性催化还原转化器采用的催化剂为钒、钨或钛。
本发明一种排放标准高的汽车尾气净化器，其气孔的孔数为600孔/平方英寸。
本发明一种排放标准高的汽车尾气净化器，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：
本发明一种排放标准高的汽车尾气净化器，利用排气细管和陶瓷蜂窝载体两级过滤，将主要成分为CO、HC、NOx的尾气，反应成CO2、H2O、N2和O2，同时隔壁上的微孔能有效过滤废气中的碳烟颗粒，并在催化剂涂层的作用下碳烟颗粒会被燃烧掉，使得陶瓷蜂窝载体具有再生功能，能继续进行碳烟颗粒的过滤和净化，保证了排出的柴油发动机尾气不会污染环境；并且采用主管道分流到分管道后，在有限的空间内增大了过滤面积，使得汽车尾气的净化效果更好。
附图说明
图1为本发明一种排放标准高的汽车尾气净化器的结构示意图。
图2为本发明的陶瓷蜂窝载体的截面示意图。
图3为本发明的陶瓷蜂窝载体的部分轴向截面图。
图4为本发明的陶瓷蜂窝载体的隔壁的结构示意图。
图中：
过滤箱1，
主管道2，
陶瓷蜂窝载体3，
气孔3.1，
封堵面3.2，
隔壁3.3，
微孔3.4，
催化剂涂层3.5
开口3.6，
排气细管4，
分管道5，
尾气6，
喷雾室7，
选择性催化还原转化器8。
具体实施方式
参见图1-4，本发明涉及一种排放标准高的汽车尾气净化器，它包括过滤箱1，所述过滤箱1的包括位于上部的圆柱形主管道2和下部有两个分叉的圆柱形分管道5，所述两个分管道5的轴心线与主管道2的轴心线分别呈45°角，所述分管道5内沿气流方向依次设置有排气细管4和陶瓷蜂窝载体3，所述陶瓷蜂窝载体3与分管道5的内壁相对应，且陶瓷蜂窝载体3沿轴线方向密布有气孔3.1，所述气孔3.1的一端为开口3.6，另一端设置有封堵面3.2，所述封堵面3.2和开口3.6间隔布置，所述相邻两个气孔3.1设置有隔壁3.3，隔壁3.3上开有呈蜂窝状的微孔3.4，隔壁3.3上涂覆有催化剂涂层3.5。
所述过滤箱1的尾气出口处还设置有喷雾室7和选择性催化还原转化器8，喷雾室7内壁上设置有喷嘴，喷嘴喷射尿素溶液，选择性催化还原转化器8采用的催化剂为钒、钨或钛，选择性催化还原转化器8，又称之为SCR，其采用的还原剂是喷雾室7喷射的尿素溶液，尿素加水后在高温下分解为NH3和CO2，与柴油车尾气中的NO和NO2通过化学反应，产生氮气和水，降低柴油车尾气中的NO和NO2排放。
其中，气孔3.1的孔数为600孔/平方英寸，隔壁3.3的厚度为0.13~0.14mm。
工作原理：柴油发动机排出的带有碳烟颗粒的废气经主管道2分流进入分管道5，通过排气细管4进行一级过滤，然后进入陶瓷蜂窝载体3进行二级过滤，尾气从气孔3.1的开口3.6进入，由于气孔3.1在一端是开口3.6，而在另一端则是封堵面3.2，因此废气会通过带有微孔3.4的隔壁3.3，然后从相邻气孔3.1的开口3.6排出，由于碳烟颗粒的直径较微孔3.4大，因此废气中的碳烟颗粒将被过滤捕捉在隔壁3.3上，气流则从微孔3.4穿过，从陶瓷蜂窝载体3排出的废气进入低温催化区7进行三级过滤，进一步净化残留的有害气体。
所述催化剂涂层3.5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3.4时，涂覆在隔壁3.3上的催化剂涂层3.5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3.5的作用下，隔壁3.3上的碳烟颗粒会逐步燃烧而氧化，碳烟颗粒的净化率约达到85% 以上，当反应温度达到500 摄氏度时催化剂和碳烟颗粒反应从而完全燃烧掉（催化燃烧），此时碳烟颗粒的净化率可达90% 以上。

Claims (3)

1.一种排放标准高的汽车尾气净化器，包括过滤箱（1），其特征在于：所述过滤箱（1）的包括位于上部的主管道（2）和下部有两个分叉的分管道（5），所述两个分管道（5）的轴心线与主管道（2）的轴心线分别呈45°角，所述分管道（5）内沿气流方向依次设置有排气细管（4）和陶瓷蜂窝载体（3），所述陶瓷蜂窝载体（3）与分管道（5）的内壁相对应，且陶瓷蜂窝载体（3）沿轴线方向密布有气孔（3.1），所述气孔（3.1）的一端为开口（3.6），另一端设置有封堵面（3.2），所述封堵面（3.2）和开口（3.6）间隔布置，所述相邻两个气孔（3.1）之间设置有隔壁（3.3），隔壁（3.3）上开有呈蜂窝状的微孔（3.4），隔壁（3.3）上涂覆有催化剂涂层（3.5），所述过滤箱（1）的尾气出口处还设置有喷雾室（7）和选择性催化还原转化器（8），喷雾室（7）内壁上设置有喷嘴，喷嘴喷射尿素溶液，选择性催化还原转化器（8）采用的催化剂为钒、钨或钛。
2.根据权利要求1所述的一种排放标准高的汽车尾气净化器，其特征在于：所述气孔（3.1）的孔数为600孔/平方英寸。
3.根据权利要求1或2所述的一种排放标准高的汽车尾气净化器，其特征在于：所述隔壁（3.3）的厚度为0.13~0.14mm。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108104909A (zh) * 2017-12-27 2018-06-01 高飞 一种汽车尾气三级过滤装置
CN108561210A (zh) * 2018-01-24 2018-09-21 大连海事大学 船用柴油机污染物排放处理系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108104909A (zh) * 2017-12-27 2018-06-01 高飞 一种汽车尾气三级过滤装置
CN108561210A (zh) * 2018-01-24 2018-09-21 大连海事大学 船用柴油机污染物排放处理系统

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