WO2017193673A1 - Procédé de purification de gaz d'échappement d'automobiles - Google Patents

Procédé de purification de gaz d'échappement d'automobiles Download PDF

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Publication number
WO2017193673A1
WO2017193673A1 PCT/CN2017/074904 CN2017074904W WO2017193673A1 WO 2017193673 A1 WO2017193673 A1 WO 2017193673A1 CN 2017074904 W CN2017074904 W CN 2017074904W WO 2017193673 A1 WO2017193673 A1 WO 2017193673A1
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WIPO (PCT)
Prior art keywords
automobile
exhaust gas
purifier
exhaust
pressure value
Prior art date
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Ceased
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PCT/CN2017/074904
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English (en)
Chinese (zh)
Inventor
崔翠翠
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Individual
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Publication of WO2017193673A1 publication Critical patent/WO2017193673A1/fr
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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
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to the technical field of automobile exhaust gas control, in particular to a method for purifying automobile exhaust gas.
  • the car exhaust gas purifier installed inside the car can usually absorb the harmful gas once, but when the road surface is uneven, for example, the car engine needs to output a large power. At this time, exhaust gas with a relatively high amount of harmful gas is discharged, and the exhaust gas purifier of the automobile is difficult to absorb the harmful gas in the exhaust gas, thereby causing environmental pollution.
  • nitrogen oxides in automobile exhaust include various compounds such as nitrous oxide (N 2 O), nitrogen monoxide (NO), nitrogen dioxide (NO 2 ), nitrogen trioxide (N 2 O 3 ), etc. .
  • nitrogen dioxide other nitrogen oxides are extremely unstable. When exposed to light, humidity or heat, they become nitrogen dioxide and nitrogen monoxide.
  • Nitric oxide becomes nitrogen dioxide, and nitrogen dioxide is a kind of corrosion.
  • Sexual gas Inhalation of nitrogen dioxide in the early stage will have mild eye and upper respiratory tract irritation, such as pharyngeal discomfort, dry cough, etc., and after a few hours of incubation, chest tightness, respiratory distress, cough, sputum, cyanosis, etc. It may even make people faint.
  • the object of the present invention is to provide a vehicle exhaust gas purification
  • the method can effectively control the content of nitrogen oxides in the automobile exhaust gas, and reduce the pollution of the automobile exhaust gas to the environment and the harm to the human body.
  • the present invention adopts the following technical solutions:
  • a method for purifying automobile exhaust gas includes the following steps:
  • the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the nitrogen oxides in the exhaust gas of the automobile are ionized by high-energy electron beam irradiation to realize the exhaust of the automobile.
  • the process of discharging the automobile exhaust to the second purifier of the automobile includes:
  • V is the reference speed
  • r is the rotational speed of the automobile engine
  • C is the nitrogen oxide emission amount
  • T is the current temperature in the second purifier of the automobile
  • P is the exhaust pressure value
  • a is a constant conversion coefficient
  • the automobile exhaust gas purifying method of the present invention determines whether it is necessary to perform secondary treatment on the automobile exhaust gas through the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine and the amount of nitrogen oxide emissions, and if so, passes through the high-energy electron.
  • the way of beam irradiation is to secondarily absorb the automobile exhaust in the second purifier of the automobile. Therefore, the vehicle will not emit excessive nitrogen oxides when it is driven on various road surfaces or when the engine work is different, effectively preventing the automobile exhaust gas from polluting the environment and harming the human body.
  • FIG. 1 is a schematic flow chart of a method for purifying an automobile exhaust gas according to an embodiment of the present invention.
  • a method for purifying an automobile exhaust gas includes the following steps:
  • step S101 the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine is obtained. Since the car produces different power on different roads or when the speed of the car is different, the exhaust pressure at the outlet of the exhaust pipe of the automobile engine is also different. When the exhaust pressure value is different, the content of harmful gases contained in the exhaust gas at the outlet of the exhaust pipe of the engine is also different.
  • Step S102 when the exhaust pressure value reaches a predetermined value, detecting exhaust gas at the outlet of the automobile exhaust gas purifier.
  • the exhaust gas of the automobile exhaust gas purifier outlet is detected, which can effectively reduce the number of times and time of using the equipment used in the process, and prolong the service life of the equipment. .
  • the type and content of the harmful gas contained in the exhaust gas can be separately detected by a plurality of gas detectors.
  • M% the content of all harmful gases in the exhaust gas discharged from the outlet of the automobile exhaust gas purifier per unit time
  • the harmful gas in the automobile exhaust gas is usually discharged after the automobile exhaust gas purifier is absorbed.
  • the pressure value is greater than the predetermined value, there is a possibility that the automobile exhaust exceeds the standard.
  • the predetermined value can be determined after testing according to different engines. For example, by detecting the content of harmful gas in the exhaust gas at the exhaust pipe of the automobile engine exhaust pipe, when the content reaches the maximum value that can be absorbed by the automobile exhaust gas purifier, the exhaust gas at the outlet of the exhaust pipe of the automobile engine at this time can be exhausted.
  • the value of the pressure value For this predetermined value.
  • Step S103 judging whether the nitrogen oxide emission amount in the automobile exhaust exceeds a threshold according to the detected result. If yes, step S104 is performed. Otherwise, the process returns to step S101 or step S102.
  • the threshold can be set to 78 mg/km.
  • Step S104 if the result of the determination in step S103 is YES, the second purifier valve of the automobile is opened, the exhaust of the automobile is discharged to the second purifier of the automobile, and the automobile is irradiated by high energy electron beam irradiation (EBDC).
  • EBDC electron beam irradiation
  • the automobile second purifier is a device specially used for secondary absorption treatment of various harmful gases in the automobile exhaust gas, and can be connected at the exit of the automobile exhaust gas purifier.
  • the second purifier of the automobile may also be filled with a carbon monoxide adsorbent for treating carbon monoxide in the exhaust gas.
  • the carbon monoxide absorbent may be a composition composed of a porous inorganic carrier and a binary complex of a nitride and a copper chloride carried thereon, and the nitride in the composition accounts for 0.45-0.8 molar ratio.
  • the inorganic carrier comprises: porous ceramic, activated carbon or titanium oxide; the nitride is pyridine and Compositions.
  • the process of detecting exhaust gas at the outlet of the automobile exhaust gas purifier may include the following steps:
  • the nitrogen oxide emissions are obtained.
  • automobile exhaust gas usually contains various harmful gases such as carbon monoxide, hydrocarbons, sulfur oxides, and nitrogen oxides.
  • harmful gases such as carbon monoxide, hydrocarbons, sulfur oxides, and nitrogen oxides.
  • Each of these gases has a specific characteristic absorption band and characteristic frequency that is strongly absorbed when the infrared spectrum falls near the characteristic frequency band. Therefore, the infrared spectrum of the corresponding characteristic frequency can be used to detect the components of the harmful gas in the exhaust gas, and the amount of the absorbed external spectrum can detect the content of the corresponding gas.
  • the method before the analyzing the NOx emission amount according to the electrical signal, the method further includes the following steps: sequentially filtering and amplifying the electrical signal.
  • the electrical signal can be filtered and amplified by the filtering circuit and the amplifying circuit respectively. After filtering and amplifying the electrical signal, the accuracy of the electrical signal detection can be effectively improved.
  • the following steps may be further included:
  • the opening time of the second purifier valve of the automobile is controlled according to the delay instruction, and the exhaust pressure value at the outlet of the exhaust pipe of the automobile engine is stopped during the opening time.
  • the predetermined time is generally set to a time of a few seconds, for example 3-5 seconds. If it is determined that the car is driving on a rough mountain road, the opening time of the second purifier valve of the car can be extended, for example, to 5 minutes or 10 minutes.
  • the opening time can be set in advance, and the specific setting process can adopt the prior art, and details are not described herein.
  • the predetermined time, the predetermined value, the set threshold, and the like may be set by using similar means according to actual needs.
  • the process of controlling the opening time of the second purifier valve of the automobile according to the delay instruction may specifically include the following steps:
  • Extracting a time value in the delay instruction is proportional to the exhaust pressure value and the actual number of times;
  • a timer After opening the second purifier valve of the automobile, a timer is turned on, and the second purifier valve of the automobile is turned off when the timer reaches the time value.
  • the method may further include the following steps: generating an alarm instruction, and displaying an alarm identifier at a predetermined position of the automobile dashboard according to the alarm instruction.
  • the nitrogen oxide emission in the exhaust gas can be displayed more intuitively and timely, so that people can overhaul the engine through the alarm and the displayed content, and timely control the nitrogen oxides in the exhaust gas to pollute the environment.
  • the process of discharging the automobile exhaust gas to the second purifier of the automobile may specifically include the following steps:
  • the reference speed is calculated based on the rotational speed, the current temperature, the exhaust pressure value, and the NOx emission amount, and the speed at which the vehicle exhaust is discharged to the second purifier of the automobile is adjusted according to the reference speed.
  • V is the reference speed
  • r is the rotational speed of the automobile engine
  • C is the nitrogen oxide emission amount
  • T is the current temperature in the second purifier of the automobile
  • P is the exhaust pressure value
  • a is a constant conversion coefficient
  • an automobile exhaust gas purifying method determines whether it is necessary to perform secondary treatment on the automobile exhaust gas by using the exhaust gas pressure value at the outlet of the exhaust pipe of the automobile engine and the nitrogen oxide emission amount. If it is, the vehicle exhaust gas is secondarily absorbed in the second purifier of the automobile by means of high-energy electron beam irradiation. Therefore, the vehicle will not emit excessive nitrogen oxides when it is driven on various road surfaces or when the engine work is different, effectively preventing the automobile exhaust gas from polluting the environment and harming the human body.

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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)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Treating Waste Gases (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

L'invention concerne un procédé de purification de gaz d'échappement d'automobiles, comprenant les étapes consistant à : obtenir une valeur de pression d'échappement au niveau d'une sortie de tuyau d'échappement de moteur d'automobile ; lorsque la valeur de pression d'échappement atteint une valeur prédéfinie, détecter les gaz d'échappement d'une sortie de purificateur de gaz d'échappement d'automobile ; en fonction du résultat de la détection, déterminer si une quantité d'émission d'oxydes d'azote dans le gaz d'échappement d'automobile dépasse une valeur seuil ; si c'est le cas, ouvrir une soupape d'un second purificateur d'automobile, décharger le gaz d'échappement d'automobile vers le second purificateur d'automobile, et ioniser les oxydes d'azote dans le gaz d'échappement d'automobile par l'intermédiaire d'un moyen d'irradiation par faisceau d'électrons à haute énergie, de manière à mettre en œuvre un traitement d'absorption secondaire sur le gaz d'échappement d'automobile. Le procédé détermine s'il faut effectuer le traitement secondaire sur les gaz d'échappement d'automobile par l'intermédiaire de la valeur de pression d'échappement et de la quantité d'émission d'oxydes d'azote, et empêche la pollution de l'environnement par le gaz d'échappement.
PCT/CN2017/074904 2016-05-09 2017-02-26 Procédé de purification de gaz d'échappement d'automobiles Ceased WO2017193673A1 (fr)

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CN201610301597.2 2016-05-09
CN201610301597.2A CN105781685A (zh) 2016-05-09 2016-05-09 汽车尾气净化方法

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108825333A (zh) * 2018-06-09 2018-11-16 安徽华兴车辆有限公司 一种汽车尾气回收消防系统
US10947895B1 (en) 2020-05-29 2021-03-16 Philip Owen Jung Internal cleaning of an internal combustion engine and its after-treatment system

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CN105781685A (zh) * 2016-05-09 2016-07-20 饶川辉 汽车尾气净化方法
CN105966408A (zh) * 2016-05-09 2016-09-28 黄安武 汽车安全检测方法
CN105822389A (zh) * 2016-05-09 2016-08-03 黄安武 汽车尾气中的一氧化碳净化方法
CN105863794A (zh) * 2016-05-09 2016-08-17 黄安武 汽车尾气排放控制方法
CN110552760A (zh) * 2019-07-24 2019-12-10 扬州工业职业技术学院 一种汽车尾气检测净化方法
CN112279222B (zh) * 2020-11-12 2022-04-26 杭州汉德空分设备有限公司 一种变压吸附制氮设备
CN112782368A (zh) * 2021-01-04 2021-05-11 北京市环境保护科学研究院 一种工业有机废气收集效率评估的测试系统及方法
CN115013129B (zh) * 2022-06-16 2023-08-08 江铃汽车股份有限公司 一种防止柴油机尾气排放物pn超标的控制策略
CN116557125B (zh) * 2023-07-11 2023-09-15 苏州有单互联网科技有限公司 一种汽车尾气自检净化系统

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CN1185351A (zh) * 1996-02-29 1998-06-24 三菱瓦斯化学株式会社 新型一氧化碳吸附剂及方法
CN101346619A (zh) * 2005-12-28 2009-01-14 丰田自动车株式会社 废气分析器及废气分析方法
CN102434253A (zh) * 2011-09-29 2012-05-02 华北电力大学 一种汽车尾气三级处理装置及其分离方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108825333A (zh) * 2018-06-09 2018-11-16 安徽华兴车辆有限公司 一种汽车尾气回收消防系统
US10947895B1 (en) 2020-05-29 2021-03-16 Philip Owen Jung Internal cleaning of an internal combustion engine and its after-treatment system
US10947896B1 (en) 2020-05-29 2021-03-16 Philip Owen Jung Internal cleaning of an internal combustion engine after-treatment system
US10989085B1 (en) 2020-05-29 2021-04-27 Philip Owen Jung Emission-free cold-start and warm-start of internal combustion engines
DE102021204190A1 (de) 2020-05-29 2021-12-02 Philip Owen Jung Emissionsfreier kaltstart und warmstart von verbrennungsmotoren

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