[go: up one dir, main page]

CN106988839A - 满足在用车NOx和PM排放控制的柴油机后处理系统 - Google Patents

满足在用车NOx和PM排放控制的柴油机后处理系统 Download PDF

Info

Publication number
CN106988839A
CN106988839A CN201710383085.XA CN201710383085A CN106988839A CN 106988839 A CN106988839 A CN 106988839A CN 201710383085 A CN201710383085 A CN 201710383085A CN 106988839 A CN106988839 A CN 106988839A
Authority
CN
China
Prior art keywords
scr
diesel engine
urea
nox
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710383085.XA
Other languages
English (en)
Inventor
臧志成
朱磊
赵闯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kailong High Technology Co Ltd
Original Assignee
Kailong High Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kailong High Technology Co Ltd filed Critical Kailong High Technology Co Ltd
Priority to CN201710383085.XA priority Critical patent/CN106988839A/zh
Publication of CN106988839A publication Critical patent/CN106988839A/zh
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • 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
    • F01N3/025—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 using fuel burner or by adding fuel to exhaust
    • F01N3/0253—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 using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • 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
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/32—Arrangements for supply of additional air using air pump
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/026—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting NOx
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
    • 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
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Landscapes

  • 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 After Treatment (AREA)

Abstract

本发明公开一种满足在用车NOx和PM排放控制的柴油机后处理系统，该系统包括SCR尿素后处理系统和低温燃烧器喷油助燃CDPF系统；所述SCR尿素后处理系统包括压缩空气调节阀、空气辅助计量泵、柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器、尿素喷嘴、SCR催化转化器、SCR电控单元。本发明在用柴油机排放限值要求，采用SCR和DPF技术，在柴油机各种运行工况下实现安全、可靠的排放控制，实现了柴油机排气后处理PM和NOx排放协同控制。

Description

满足在用车NOx和PM排放控制的柴油机后处理系统
技术领域
本发明涉及柴油机尾气后处理技术领域，尤其涉及一种满足在用车NOx和PM排放控制的柴油机后处理系统。
背景技术
近年来，我国各大城市连续出现雾霾现象，严重危害人们健康，影响我国国际形象。控制柴油机尾气中的氮氧化物(NOx)和颗粒物(PM)排放是治理城市空气污染的关键。在用车柴油机原排PM排放高，运行工况恶劣，排温低，单独依靠DPF的被动再生无法进行颗粒物的有效清除。
发明内容
本发明的目的在于通过一种满足在用车NOx和PM排放控制的柴油机后处理系统，来解决以上背景技术部分提到的问题。
为达此目的，本发明采用以下技术方案：
一种满足在用车NOx和PM排放控制的柴油机后处理系统，其包括SCR尿素后处理系统和低温燃烧器喷油助燃CDPF系统；所述SCR尿素后处理系统包括压缩空气调节阀、空气辅助计量泵、柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器、尿素喷嘴、SCR催化转化器、SCR电控单元；所述压缩空气调节阀连接空气辅助计量泵；所述空气辅助计量泵连接尿素罐；所述柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器连接SCR电控单元；所述尿素喷嘴一端连接空气辅助计量泵，另一端连接SCR催化转化器；所述低温燃烧器喷油助燃CDPF系统包括压缩空气气泵、低压燃油油泵、燃油空气混合器、点火塞、燃油喷嘴、燃烧室、壁流式CDPF催化转化器、氧化性DOC催化转换器、DPF电控单元；所述压缩空气气泵一端连接DPF电控单元，另一端连接燃油空气混合器；低压燃油油泵连接燃油空气混合器、DPF电控单元；所述燃油空气混合器通过燃油喷嘴连接燃烧室；所述燃烧室连接柴油机、氧化性DOC催化转换器；所述氧化性DOC催化转换器连接壁流式CDPF催化转化器；所述壁流式CDPF催化转化器通过法兰串接在排气管之间。
特别地，所述低温燃烧器喷油助燃CDPF系统采用油气混合进行点火，实现壁流式CDPF催化转化器再生温度的控制，当排气温度高于设定温度时，通过氧化性DOC催化转换器产生的NO2排放使壁流式CDPF催化转化器实现被动再生。
特别地，所述空气辅助计量泵用于尿素和空气的计量和预混合，完成尿素精确计量。
特别地，所述SCR电控单元用于对柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器的输出信号进行处理，计算尿素消耗量，驱动尿素喷嘴，控制NOx排放。
特别地，在所述SCR催化转化器前安装NOx传感器以采集柴油机的NOx排放；在所述SCR催化转化器后安装NOx传感器，用于计算尿素喷射量和NOx排放转化效率，不需要对柴油机原始NOx排放进行精确标定，直接在实际车辆上进行测试和标定。
特别地，所述SCR尿素后处理系统的SCR尿素喷射温度控制在220℃以上。
本发明提出的满足在用车NOx和PM排放控制的柴油机后处理系统满足在用柴油机排放(NOx、PM、CO、HC)限值要求，采用SCR和DPF技术，在柴油机各种运行工况下实现安全、可靠的排放控制，实现了柴油机排气后处理PM和NOx排放协同控制。本发明不需要进行大量的柴油机机内热管理标定，后处理热管理标定独立，降低机内和机外耦合性标定，安装布置简单，维修方便，适合国内各种柴油机在用车改装后处理需求。
附图说明
图1为本发明实施例提供的满足在用车NOx和PM排放控制的柴油机后处理系统结构图。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的较佳实施例。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容理解的更加透彻全面。需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参照图1所示，图1为本发明实施例提供的满足在用车NOx和PM排放控制的柴油机后处理系统结构图。
本实施例中满足在用车NOx和PM排放控制的柴油机后处理系统具体包括SCR尿素后处理系统和低温燃烧器喷油助燃CDPF系统；所述SCR尿素后处理系统包括压缩空气调节阀、空气辅助计量泵101、柴油机出口NOx传感器102、柴油机出口排温传感器、SCR催化转化器104入口温度传感器、SCR催化转化器104出口温度传感器、尿素温度传感器、空气压力传感器、尿素喷嘴103、SCR催化转化器104、SCR电控单元105；所述压缩空气调节阀连接空气辅助计量泵101；所述空气辅助计量泵101连接尿素罐106；所述柴油机出口NOx传感器102、柴油机出口排温传感器、SCR催化转化器104入口温度传感器、SCR催化转化器104出口温度传感器、尿素温度传感器、空气压力传感器连接SCR电控单元105；所述尿素喷嘴103一端连接空气辅助计量泵101，另一端连接SCR催化转化器104；所述低温燃烧器喷油助燃CDPF系统包括压缩空气气泵107、低压燃油油泵108、燃油空气混合器109、点火塞、燃油喷嘴110、燃烧室111、壁流式CDPF催化转化器112、氧化性DOC催化转换器113、DPF电控单元114；所述压缩空气气泵107一端连接DPF电控单元114，另一端连接燃油空气混合器109；低压燃油油泵108连接燃油空气混合器109、DPF电控单元114；所述燃油空气混合器109通过燃油喷嘴110连接燃烧室111；所述燃烧室111连接柴油机115、氧化性DOC催化转换器113；所述氧化性DOC催化转换器113连接壁流式CDPF催化转化器112；所述低温燃烧器喷油助燃CDPF系统还包括油箱116、排温传感器117、压差传感器118。所述壁流式CDPF催化转化器112通过法兰串接在排气管之间。
在本实施中所述低温燃烧器喷油助燃CDPF系统采用油气混合进行点火，实现壁流式CDPF催化转化器112再生温度的控制，当排气温度高于设定温度如300度时，通过氧化性DOC催化转换器113产生的NO2排放使壁流式CDPF催化转化器112实现被动再生。所述空气辅助计量泵101用于尿素和空气的计量和预混合，完成尿素精确计量。所述SCR电控单元105用于对柴油机出口NOx传感器102、柴油机出口排温传感器、SCR催化转化器104入口温度传感器、SCR催化转化器104出口温度传感器、尿素温度传感器、空气压力传感器的输出信号进行处理，计算尿素消耗量，驱动尿素喷嘴103，控制NOx排放。
在所述SCR催化转化器104前安装NOx传感器以采集柴油机115的NOx排放；在所述SCR催化转化器104后安装NOx传感器，用于计算尿素喷射量和NOx排放转化效率，不需要对柴油机115原始NOx排放进行精确标定，直接在实际车辆上进行测试和标定。所述SCR尿素后处理系统的SCR尿素喷射温度控制在220℃以上。在实际的道路工况下，设定目标NOx转化效率大于70％以上，通过目标NOx转化效率和实际NOx转化效率，计算尿素实际喷射量。
工作时，尾气从柴油机115排气口出来后，先经过低温燃烧器+DOC和CDPF催化转化器，实现对CO、HC和PM排放的控制，然后经过尿素喷射系统和SCR催化转化器104。针对目前在用和旧车辆的排放控制，柴油机后处理采用氧化催化剂技术(DOC)和颗粒过滤器技术(CDPF)的减少颗粒物(PM)、碳氢化合物(HC)和碳一氧化碳(CO)的排放量是通用的技术方案。目前在用车排放控制要求，HC和CO转化效率大于90％，颗粒物PM降低85％，NOx排放控制降低70％。根据在用车实际的原始排放、原始排气温度、整车布置尺寸，进行后处理载体和催化剂参数设计，在实际的车辆运行当中，进行后处理压降和温度信号测试，从而监控后处理运行情况。同样，在用车需要降低NOx排放，采用的选择性催化还原技术比较复杂，需要增加尿素喷射系统，通过技术改造可以降低80％以上的NOx排放，在实际车辆上进行技术改装时，需要灵活的安装和控制。采用SCR和DPF系统进行在用车改装时，比较适合大的车辆，需要很好的可靠性和低成本。
本发明在在用车技术基础上，采用低温燃烧器+DOC+CDPF+SCR系统达到NOx和PM排放控制，本方案对柴油机本体优化工作量少，不需要对柴油机原排进行台架标定，直接在整车上进行试验。本发明的技术方案满足在用柴油机排放(NOx、PM、CO、HC)限值要求，采用SCR和DPF技术，在柴油机各种运行工况下实现安全、可靠的排放控制，实现了柴油机排气后处理PM和NOx排放协同控制。本发明不需要进行大量的柴油机机内热管理标定，后处理热管理标定独立，降低机内和机外耦合性标定，安装布置简单，维修方便，适合国内各种柴油机在用车改装后处理需求。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random AccessMemory，RAM)等。
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理，而不能以任何方式解释为对本发明保护范围的限制。基于此处的解释，本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式，这些方式都将落入本发明的保护范围之内。

Claims (6)

1.一种满足在用车NOx和PM排放控制的柴油机后处理系统，其特征在于，包括SCR尿素后处理系统和低温燃烧器喷油助燃CDPF系统；所述SCR尿素后处理系统包括压缩空气调节阀、空气辅助计量泵、柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器、尿素喷嘴、SCR催化转化器、SCR电控单元；所述压缩空气调节阀连接空气辅助计量泵；所述空气辅助计量泵连接尿素罐；所述柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器连接SCR电控单元；所述尿素喷嘴一端连接空气辅助计量泵，另一端连接SCR催化转化器；所述低温燃烧器喷油助燃CDPF系统包括压缩空气气泵、低压燃油油泵、燃油空气混合器、点火塞、燃油喷嘴、燃烧室、壁流式CDPF催化转化器、氧化性DOC催化转换器、DPF电控单元；所述压缩空气气泵一端连接DPF电控单元，另一端连接燃油空气混合器；低压燃油油泵连接燃油空气混合器、DPF电控单元；所述燃油空气混合器通过燃油喷嘴连接燃烧室；所述燃烧室连接柴油机、氧化性DOC催化转换器；所述氧化性DOC催化转换器连接壁流式CDPF催化转化器；所述壁流式CDPF催化转化器通过法兰串接在排气管之间。
2.根据权利要求1所述的满足在用车NOx和PM排放控制的柴油机后处理系统，其特征在于，所述低温燃烧器喷油助燃CDPF系统采用油气混合进行点火，实现壁流式CDPF催化转化器再生温度控制，当排气温度高于设定温度时，通过氧化性DOC催化转换器产生NO2排放使壁流式CDPF催化转化器实现被动再生。
3.根据权利要求1所述的满足在用车NOx和PM排放控制的柴油机后处理系统，其特征在于，所述空气辅助计量泵用于尿素和空气的计量和预混合，完成尿素精确计量。
4.根据权利要求1所述的满足在用车NOx和PM排放控制的柴油机后处理系统，其特征在于，所述SCR电控单元用于对柴油机出口NOx传感器、柴油机出口排温传感器、SCR催化转化器入口温度传感器、SCR催化转化器出口温度传感器、尿素温度传感器、空气压力传感器的输出信号进行处理，计算尿素消耗量，驱动尿素喷嘴，控制NOx排放。
5.根据权利要求1所述的满足在用车NOx和PM排放控制的柴油机后处理系统，其特征在于，在所述SCR催化转化器前安装NOx传感器以采集柴油机的NOx排放；在所述SCR催化转化器后安装NOx传感器，用于计算尿素喷射量和NOx排放转化效率，不需要对柴油机原始NOx排放进行精确标定，直接在实际车辆上进行测试和标定。
6.根据权利要求1至5之一所述的满足在用车NOx和PM排放控制的柴油机后处理系统，其特征在于，所述SCR尿素后处理系统的SCR尿素喷射温度控制在220℃以上。
CN201710383085.XA 2017-05-26 2017-05-26 满足在用车NOx和PM排放控制的柴油机后处理系统 Pending CN106988839A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710383085.XA CN106988839A (zh) 2017-05-26 2017-05-26 满足在用车NOx和PM排放控制的柴油机后处理系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710383085.XA CN106988839A (zh) 2017-05-26 2017-05-26 满足在用车NOx和PM排放控制的柴油机后处理系统

Publications (1)

Publication Number Publication Date
CN106988839A true CN106988839A (zh) 2017-07-28

Family

ID=59420381

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710383085.XA Pending CN106988839A (zh) 2017-05-26 2017-05-26 满足在用车NOx和PM排放控制的柴油机后处理系统

Country Status (1)

Country Link
CN (1) CN106988839A (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110307063A (zh) * 2019-05-22 2019-10-08 同济大学 利用scr气辅结构的dpf主动再生进气控制系统及方法
CN111022163A (zh) * 2018-10-10 2020-04-17 托马斯马格尼特股份有限公司 用于排气后处理的设备以及用于运行设备的方法
CN111441846A (zh) * 2020-03-28 2020-07-24 潍坊势为环保有限公司 一种scr系统尿素喷射量的修正方法、装置和scr系统
CN112416471A (zh) * 2019-08-23 2021-02-26 北汽福田汽车股份有限公司 尾气监控方法、装置、计算机可读存储介质及电子设备
CN113027578A (zh) * 2019-12-25 2021-06-25 罗伯特·博世有限公司 用于车辆排气后处理系统的scr装置的台架标定系统和方法
CN115711167A (zh) * 2022-10-28 2023-02-24 重庆交通大学 一种船舶低压scr系统废气温度补偿装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102245868A (zh) * 2008-12-08 2011-11-16 三菱重工业株式会社 废气净化装置
US20110308233A1 (en) * 2010-06-18 2011-12-22 Gm Global Technology Operations, Inc. Selective catalytic reduction (scr) catalyst depletion control systems and methods
CN102449278A (zh) * 2009-05-30 2012-05-09 尤米科尔股份公司及两合公司 废气后处理系统
CN202718734U (zh) * 2012-07-16 2013-02-06 浙江荣众机械有限公司 环保型尾气排放系统
CN104454085A (zh) * 2014-10-29 2015-03-25 凯龙高科技股份有限公司 一种dpf柴油机颗粒过滤系统喷油助燃再生温度控制方法
CN104481646A (zh) * 2014-10-29 2015-04-01 凯龙高科技股份有限公司 一种dpf柴油机颗粒过滤系统的再生控制系统及方法
CN204327283U (zh) * 2014-11-17 2015-05-13 潍柴动力股份有限公司 一种车用发动机
CN105317512A (zh) * 2014-07-28 2016-02-10 通用汽车环球科技运作有限责任公司 生成用于氮氧化合物传感器偏移的防反跳持续时间的排气处理系统
CN206987918U (zh) * 2017-05-26 2018-02-09 凯龙高科技股份有限公司 满足在用车NOx和PM排放控制的柴油机后处理系统

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102245868A (zh) * 2008-12-08 2011-11-16 三菱重工业株式会社 废气净化装置
CN102449278A (zh) * 2009-05-30 2012-05-09 尤米科尔股份公司及两合公司 废气后处理系统
US20110308233A1 (en) * 2010-06-18 2011-12-22 Gm Global Technology Operations, Inc. Selective catalytic reduction (scr) catalyst depletion control systems and methods
CN202718734U (zh) * 2012-07-16 2013-02-06 浙江荣众机械有限公司 环保型尾气排放系统
CN105317512A (zh) * 2014-07-28 2016-02-10 通用汽车环球科技运作有限责任公司 生成用于氮氧化合物传感器偏移的防反跳持续时间的排气处理系统
CN104454085A (zh) * 2014-10-29 2015-03-25 凯龙高科技股份有限公司 一种dpf柴油机颗粒过滤系统喷油助燃再生温度控制方法
CN104481646A (zh) * 2014-10-29 2015-04-01 凯龙高科技股份有限公司 一种dpf柴油机颗粒过滤系统的再生控制系统及方法
CN204327283U (zh) * 2014-11-17 2015-05-13 潍柴动力股份有限公司 一种车用发动机
CN206987918U (zh) * 2017-05-26 2018-02-09 凯龙高科技股份有限公司 满足在用车NOx和PM排放控制的柴油机后处理系统

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022163A (zh) * 2018-10-10 2020-04-17 托马斯马格尼特股份有限公司 用于排气后处理的设备以及用于运行设备的方法
CN111022163B (zh) * 2018-10-10 2022-11-22 托马斯马格尼特股份有限公司 用于排气后处理的设备以及用于运行设备的方法
CN110307063A (zh) * 2019-05-22 2019-10-08 同济大学 利用scr气辅结构的dpf主动再生进气控制系统及方法
CN112416471A (zh) * 2019-08-23 2021-02-26 北汽福田汽车股份有限公司 尾气监控方法、装置、计算机可读存储介质及电子设备
CN113027578A (zh) * 2019-12-25 2021-06-25 罗伯特·博世有限公司 用于车辆排气后处理系统的scr装置的台架标定系统和方法
CN111441846A (zh) * 2020-03-28 2020-07-24 潍坊势为环保有限公司 一种scr系统尿素喷射量的修正方法、装置和scr系统
CN115711167A (zh) * 2022-10-28 2023-02-24 重庆交通大学 一种船舶低压scr系统废气温度补偿装置

Similar Documents

Publication Publication Date Title
CN206987918U (zh) 满足在用车NOx和PM排放控制的柴油机后处理系统
CN106988839A (zh) 满足在用车NOx和PM排放控制的柴油机后处理系统
CN111255547B (zh) 废气后处理系统和对内燃机进行废气后处理的方法
CN102165157B (zh) 一种用于运行带有scr催化器及在上游起氧化催化作用的排气净化部件的排气净化系统的方法
CN105917091B (zh) 用于诊断废气催化器的方法以及机动车
WO2018214861A1 (zh) 燃烧器dpf的再生控制与诊断设备
CN102844533B (zh) 发动机及废气后处理控制
CN103261609B (zh) NOx净化率降低原因诊断装置
US9399937B2 (en) Operating method for an exhaust aftertreatment system and exhaust aftertreatment system
CN108071511A (zh) 用于在排气系统的颗粒过滤器装置再生期间减轻超温的方法
CN110857642B (zh) 维持高被动烟炱氧化同时使用多给料位置进行def给料
RU2427715C2 (ru) Выхлопная система, содержащая каталитический фильтр для сажи
US20110225969A1 (en) Compressor bypass to exhaust for particulate trap regeneration
US9194272B2 (en) Power system
CN107191251A (zh) 一种满足国六排放的柴油机后处理系统
US20110271656A1 (en) Control system and method for preventing hydrocarbon slip during particulate matter filter regeneration
CN109804145A (zh) 用于再生颗粒过滤器的方法以及具有颗粒过滤器的汽车
CN106014567A (zh) 一种发动机排气处理系统
WO2014016595A1 (en) Method of controlling operation of an engine having both an exhaust fluid recirculation apparatus and an exhaust fluid treatment apparatus
US9046026B2 (en) Particulate oxidation catalyst with dual pressure-drop sensors
CN102733910A (zh) 用于控制颗粒过滤器再生的方法和装置
CN101512129A (zh) 低怠速废气再循环系统
CN203925695U (zh) 发动机排气温度的控制系统
US20170175655A1 (en) Method for operating an engine
KR101575478B1 (ko) 디젤 분진 필터 후단의 배기가스 재순환 장치 및 방법

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170728

RJ01 Rejection of invention patent application after publication