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WO2023015888A1 - Scr catalyst performance evaluation system for marine engine - Google Patents

Scr catalyst performance evaluation system for marine engine Download PDF

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Publication number
WO2023015888A1
WO2023015888A1 PCT/CN2022/081874 CN2022081874W WO2023015888A1 WO 2023015888 A1 WO2023015888 A1 WO 2023015888A1 CN 2022081874 W CN2022081874 W CN 2022081874W WO 2023015888 A1 WO2023015888 A1 WO 2023015888A1
Authority
WO
WIPO (PCT)
Prior art keywords
test
valve
mixer
reactor
scr catalyst
Prior art date
Application number
PCT/CN2022/081874
Other languages
French (fr)
Chinese (zh)
Inventor
刘博群
崔少平
郭铭玉
董世培
赵英杰
叶伟
赵俊杰
李士娜
陈怡�
管翔
张继周
Original Assignee
交通运输部天津水运工程科学研究所
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 交通运输部天津水运工程科学研究所 filed Critical 交通运输部天津水运工程科学研究所
Publication of WO2023015888A1 publication Critical patent/WO2023015888A1/en

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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
    • 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
    • F01N3/08—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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/10—Fitting temporarily exhaust apparatus on exhaust conduit, e.g. in confined environment, garage or the like
    • 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
    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/02—Catalytic activity of catalytic converters
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • 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
    • 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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
    • 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 utility model relates to an SCR catalyst performance evaluation system, in particular to a marine engine SCR catalyst performance evaluation system.
  • Nitrogen oxides are the most important pollutants emitted by marine engines.
  • Selective catalytic reduction and denitrification technology (SCR) is mainly used to treat nitrogen oxides.
  • the emission certification of marine engines is generally carried out by engine + SCR system bench emission test or model calculation mode. . No matter what method is adopted, the results of SCR type selection and simulation calculation must be in good agreement with the results of engine test emission verification.
  • the main SCR performance evaluation system has a good application in diesel engine, but the exhaust emission of marine engine has its own characteristics.
  • the utility model provides a marine engine SCR catalyst performance evaluation system for solving the technical problems existing in the known technology.
  • the performance evaluation system is simple and practical in structure, easy to operate, can well simulate the characteristics of the marine engine SCR system, and greatly improve the SCR performance.
  • the consistency of catalyst performance evaluation results with bench emission test results significantly reduces the workload of SCR catalyst selection and SCR scheme design.
  • a marine engine SCR catalyst performance evaluation system including an exhaust gas simulation part and a test part
  • the exhaust gas simulation part includes gas bottle part, pre-mixer and main mixer
  • the gas bottle part includes a plurality of parallel gas cylinders
  • a valve I is arranged at the outlet of each gas bottle
  • the pre-mixer and the A water vapor generator is connected to the pipeline of the main mixer
  • a valve II is arranged at the outlet of the water vapor generator
  • the test part includes a plurality of parallel test lines and an exhaust gas detector, and each test A heating furnace and a reactor are arranged in turn on the line
  • a valve III is arranged at the inlet of the heating furnace, a temperature flowmeter is arranged at the inlet of the reactor, and a valve IV is arranged at the outlet, and the valve IV is connected with the The tail gas detector is connected, and the valve III is connected with the main mixer.
  • the reactor comprises at least three kinds, one of which is provided with a ceramic lining.
  • the utility model has the advantages and positive effects: it can truly simulate the exhaust gas components, gas temperature and humidity, flow rate and flow rate of the marine engine, realize the uninterrupted operation of the test device, and greatly improve the test efficiency; it can simulate the flow rate of the marine engine in proportion , exhaust gas concentration, reaction temperature, volume ratio of SCR catalyst to engine, surface velocity and linear velocity of airflow in SCR catalyst and other parameters, basically meet all the test conditions and requirements for marine SCR catalyst; it can be adjusted by adjusting the valve, opening and closing the heating furnace Measure the initial concentration and post-reaction concentration of the reaction gas passing through the exhaust gas detector, so as to calculate the conversion efficiency of the SCR catalyst; the catalyst sample can be installed and replaced in the non-working reactor by adjusting the valve, so as to realize the uninterrupted performance evaluation of the SCR catalyst; According to the humidity and corrosiveness of the simulated tail gas, different types of reactors are set up, and the catalyst can be tested in different working conditions without stopping the machine, which ensures the accuracy, efficiency and continuity of the catalyst performance test. Moreover, the
  • Fig. 1 is the structural representation of the utility model.
  • a kind of marine engine SCR catalyst performance evaluation system comprises tail gas simulation part and test part, and described tail gas simulation part comprises the cylinder part, premixer 2 and main mixer 3 that are connected successively by pipeline, so
  • the gas cylinder part includes a plurality of parallel gas cylinders 1, and a valve I11 is provided at the outlet of each gas cylinder 1, and is connected to the pipeline connecting the premixer 2 and the main mixer 3.
  • a valve II41 is provided at the outlet of the water vapor generator 4, and the test part includes a plurality of parallel test lines and an exhaust gas detector 7, and each test line is sequentially provided with
  • the heating furnace 5 and the reactor 6 are provided with a valve III51 at the entrance of the heating furnace 5, a temperature flowmeter 61 is provided at the entrance of the reactor 6, and a valve IV62 is provided at the outlet, and the valve IV62 is connected with the
  • the tail gas detector 7 is connected, and the valve III51 is connected with the main mixer 3 .
  • the above-mentioned pre-mixer 2 is used to simulate the exhaust function of the marine engine, and the main mixer is used to simulate the function of the mixing chamber of the SCR system of the marine engine.
  • the reactor 6 includes at least three types, one of which is provided with a ceramic lining for corrosive atmosphere conditions, and one is used for non-corrosive water-containing atmosphere conditions, and high-grade stainless steel materials such as Made of 316L, it is used in non-corrosive dry atmosphere conditions, and any grade of stainless steel can be used.
  • the material of the above-mentioned pipelines is mainly stainless steel, and some are polytetrafluoroethylene.
  • the catalyst is placed in reactor 6. Firstly, the gas distribution is performed according to the evaluation conditions. The flow rate of each gas is adjusted through the valve I11, and premixed in the pre-mixer 2. If water vapor needs to be added to the reaction gas, it is added through the water vapor generator 4, and then enters the main mixer after mixing. 3 for mixing.
  • the mixed simulated tail gas enters the heating furnace 5 through the regulating valve III51.
  • the heating furnace is an external structure, which can realize the function of no heating.
  • the flow rate and temperature of the gas are confirmed by the temperature flowmeter, and then enter the reactor 6 .
  • the system is designed with 3 reactors, one of which is specially designed for the sulfur aging test.
  • the gas After the gas reacts in the reactor 6, it enters the tail gas detector 7 for detection, and the conversion efficiency of the SCR catalyst is calculated by comparing the concentrations before and after the reaction.
  • the catalyst When used, the catalyst is placed in the reactor 6.
  • the components of the simulated exhaust gas are output from the cylinder 1, and firstly flow into the pre-mixer 2 for mixing. If water vapor needs to be added to the simulated tail gas, the water-containing gas (generally nitrogen) provided by the water vapor generator 4 is connected to the pipeline after the premixer, and then enters the main mixer 3 for thorough mixing.
  • the fully mixed simulated tail gas enters the test line according to the test requirements.
  • the simulated tail gas is heated to the required temperature under the action of the heating furnace 5, and then enters the corresponding reactor 6.
  • the test lines are connected in parallel and switched according to the test working conditions.
  • the catalyst is loaded into a reactor with a ceramic lining, and the valve on the test line is opened, and the valves on other test lines are closed, so that the simulated exhaust gas passes through the cylinder part
  • the premixer 2 and the main mixer 3 enter the reactor with ceramic lining after opening the heating furnace 5 and the temperature flowmeter 61 on the valve test line, and finally discharge after being detected by the exhaust gas detector 7.
  • the reactor 6 on the test line with the valve closed is in an isolated state, and the catalyst for testing can be installed.
  • the catalyst sample in the predetermined reactor can be tested by opening the valve on the predetermined test line, closing the valve on the current test line, and adjusting the valve 11 of the gas cylinder without stopping the machine. Without shutting down, open the reactor that has completed the test, the sulfur-aged catalyst can be taken out, and other catalysts can be placed in the non-working reactor according to the test needs.

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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)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

An SCR catalyst performance evaluation system for a marine engine, comprising an exhaust gas simulation portion and a test portion; the exhaust simulation portion comprises a gas cylinders (1) portion, a pre-mixer (2) and a main mixer (3), which are connected in sequence by means of a pipe; and a water vapor generator (4) is inserted into to a pipe that connects the pre-mixer (2) and the main mixer (3). The test portion comprises a plurality of test lines that form a parallel connection and an exhaust detector (7); a heating furnace (5) and a reactor (6) are sequentially arranged on each test route; valves III (51) are provided at inlets of the heating furnaces (5); temperature flowmeters (61) are provided at inlets of the reactors (6), and valves IV (62) are provided at outlets of the reactors (6); the valves IV (62) are connected to the exhaust detector (7); and the valves III (51) are connected to the main mixer (3).

Description

一种船用发动机SCR催化剂性能评价系统A Performance Evaluation System for Marine Engine SCR Catalyst 技术领域technical field
本实用新型涉及一种SCR催化剂性能评价系统，特别是一种船用发动机SCR催化剂性能评价系统。The utility model relates to an SCR catalyst performance evaluation system, in particular to a marine engine SCR catalyst performance evaluation system.
背景技术Background technique
氮氧化物是船用发动机最主要的排放污染物，主要采用选择性催化还原脱硝技术(SCR)处理氮氧化物，船用发动机排放认证一般采用发动机+SCR系统台架排放试验或者采用模型计算的模式进行。无论采取什么方式，SCR选型工作及模拟计算的结果都需要跟发动机试验排放验证的结果具有较好的符合性。目前主要的SCR性能评价系统在柴油车发动机上有较好的应用，但船用发动机尾气排放有其自身特点。因此开发适应船用发动机SCR系统特点，且与船用发动机台架排放试验相符性高的船用发动机SCR催化剂性能评价系统，对缩短SCR催化剂选型周期和SCR催化剂系统设计周期、降低相应工作量具有重要意义。Nitrogen oxides are the most important pollutants emitted by marine engines. Selective catalytic reduction and denitrification technology (SCR) is mainly used to treat nitrogen oxides. The emission certification of marine engines is generally carried out by engine + SCR system bench emission test or model calculation mode. . No matter what method is adopted, the results of SCR type selection and simulation calculation must be in good agreement with the results of engine test emission verification. At present, the main SCR performance evaluation system has a good application in diesel engine, but the exhaust emission of marine engine has its own characteristics. Therefore, the development of a marine engine SCR catalyst performance evaluation system that adapts to the characteristics of the marine engine SCR system and is highly consistent with the marine engine bench emission test is of great significance for shortening the SCR catalyst selection cycle and the SCR catalyst system design cycle and reducing the corresponding workload. .
技术问题technical problem
本实用新型为解决公知技术中存在的技术问题而提供一种船用发动机SCR催化剂性能评价系统，该性能评价系统结构简单实用，操作便捷，能够很好地模拟船用发动机SCR系统的特点，大幅提高SCR催化剂性能评价结果跟台架排放试验结果的相符性，显著降低SCR催化剂选型和SCR方案设计的工作量。The utility model provides a marine engine SCR catalyst performance evaluation system for solving the technical problems existing in the known technology. The performance evaluation system is simple and practical in structure, easy to operate, can well simulate the characteristics of the marine engine SCR system, and greatly improve the SCR performance. The consistency of catalyst performance evaluation results with bench emission test results significantly reduces the workload of SCR catalyst selection and SCR scheme design.
技术解决方案technical solution
本实用新型为解决公知技术中存在的技术问题所采取的技术方案是：一种船用发动机SCR催化剂性能评价系统，包括尾气模拟部分和测试部分，所述尾气模拟部分包括通过管路依次连接的气瓶部分、预混合器和主混合器，所述气瓶部分包括多个并列的气瓶，在每个所述气瓶的出口处设有一个阀门Ⅰ，在连接所述预混器和所述主混器的管路上接入有水汽发生器，在所述水汽发生器的出口处设有阀门Ⅱ；所述测试部分包括并联的多个测试线路和一个尾气检测器，在每个所述测试线路上依次设有加热炉和反应器，在所述加热炉的入口处设有阀门Ⅲ，在所述反应器的入口处设有温度流量计、出口处设有阀门Ⅳ，所述阀门Ⅳ与所述尾气检测器连接，所述阀门Ⅲ与所述主混合器连接。The technical scheme adopted by the utility model to solve the technical problems existing in the known technology is: a marine engine SCR catalyst performance evaluation system, including an exhaust gas simulation part and a test part, and the exhaust gas simulation part includes gas bottle part, pre-mixer and main mixer, the gas bottle part includes a plurality of parallel gas cylinders, a valve I is arranged at the outlet of each gas bottle, and the pre-mixer and the A water vapor generator is connected to the pipeline of the main mixer, and a valve II is arranged at the outlet of the water vapor generator; the test part includes a plurality of parallel test lines and an exhaust gas detector, and each test A heating furnace and a reactor are arranged in turn on the line, a valve III is arranged at the inlet of the heating furnace, a temperature flowmeter is arranged at the inlet of the reactor, and a valve IV is arranged at the outlet, and the valve IV is connected with the The tail gas detector is connected, and the valve III is connected with the main mixer.
所述反应器至少包含三种，其中一种设有陶瓷内衬。The reactor comprises at least three kinds, one of which is provided with a ceramic lining.
有益效果Beneficial effect
本实用新型具有的优点和积极效果是：可真实模拟船用发动机尾气气体组分、气体温湿度、流速、流量，实现测试装置不间断运行，可大幅提高测试效率；可以按照比例模拟船用发动机的流量、尾气浓度、反应温度、SCR催化剂跟发动机的体排比、SCR催化剂中气流的面速度和线速度等参数，基本满足所有关于船用SCR催化剂的测试条件及要求；可通过调节阀门、开闭加热炉测量通过尾气检测器反应气体的初始浓度和反应后的浓度，从而计算SCR催化剂的转化效率；可通过调节阀门在未工作反应器中安装、调换催化剂样品，实现不间断进行SCR催化剂性能评价；可针对模拟尾气的湿度、腐蚀性设置不同种类的反应器，在不停机的情况下即可实现催化剂不同工况的测试，保证了催化剂性能测试的准确、高效、连续。并且本实用新型结构简单，操作简便，测试效率高，能够有效提高船用发动机SCR催化剂的设计开发工作效率，具有较好的实用性。The utility model has the advantages and positive effects: it can truly simulate the exhaust gas components, gas temperature and humidity, flow rate and flow rate of the marine engine, realize the uninterrupted operation of the test device, and greatly improve the test efficiency; it can simulate the flow rate of the marine engine in proportion , exhaust gas concentration, reaction temperature, volume ratio of SCR catalyst to engine, surface velocity and linear velocity of airflow in SCR catalyst and other parameters, basically meet all the test conditions and requirements for marine SCR catalyst; it can be adjusted by adjusting the valve, opening and closing the heating furnace Measure the initial concentration and post-reaction concentration of the reaction gas passing through the exhaust gas detector, so as to calculate the conversion efficiency of the SCR catalyst; the catalyst sample can be installed and replaced in the non-working reactor by adjusting the valve, so as to realize the uninterrupted performance evaluation of the SCR catalyst; According to the humidity and corrosiveness of the simulated tail gas, different types of reactors are set up, and the catalyst can be tested in different working conditions without stopping the machine, which ensures the accuracy, efficiency and continuity of the catalyst performance test. Moreover, the utility model has the advantages of simple structure, convenient operation and high test efficiency, can effectively improve the working efficiency of design and development of the marine engine SCR catalyst, and has better practicability.
附图说明Description of drawings
图1为本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.
图中：1、气瓶；11、阀门Ⅰ；2、预混合器；3、主混合器；4、水汽发生器；41、阀门Ⅱ；5、加热炉；51、阀门Ⅲ；6、反应器；61、温度流量计；62、阀门Ⅳ；7、尾气检测器。In the figure: 1. Gas cylinder; 11. Valve Ⅰ; 2. Pre-mixer; 3. Main mixer; 4. Water vapor generator; 41. Valve Ⅱ; 5. Heating furnace; 51. Valve Ⅲ; 6. Reactor ; 61, temperature flow meter; 62, valve IV; 7, exhaust detector.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
为能进一步了解本实用新型的发明内容、特点及功效，兹例举以下实施例，并配合附图详细说明如下：In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
请参阅图1，一种船用发动机SCR催化剂性能评价系统，包括尾气模拟部分和测试部分，所述尾气模拟部分包括通过管路依次连接的气瓶部分、预混合器2和主混合器3，所述气瓶部分包括多个并列的气瓶1，在每个所述气瓶1的出口处设有一个阀门Ⅰ11，在连接所述预混器2和所述主混器3的管路上接入有水汽发生器4，在所述水汽发生器4的出口处设有阀门Ⅱ41，所述测试部分包括并联的多个测试线路和一个尾气检测器7，在每个所述测试线路上依次设有加热炉5和反应器6，在所述加热炉5的入口处设有阀门Ⅲ51，在所述反应器6的入口处设有温度流量计61、出口处设有阀门Ⅳ62，所述阀门Ⅳ62与所述尾气检测器7连接，所述阀门Ⅲ51与所述主混合器3连接。上述预混合器2用于模拟船用发动机的排气功能，主混合器用于模拟船用发动机SCR系统混合腔的功能。Please refer to Fig. 1, a kind of marine engine SCR catalyst performance evaluation system, comprises tail gas simulation part and test part, and described tail gas simulation part comprises the cylinder part, premixer 2 and main mixer 3 that are connected successively by pipeline, so The gas cylinder part includes a plurality of parallel gas cylinders 1, and a valve I11 is provided at the outlet of each gas cylinder 1, and is connected to the pipeline connecting the premixer 2 and the main mixer 3. There is a water vapor generator 4, a valve II41 is provided at the outlet of the water vapor generator 4, and the test part includes a plurality of parallel test lines and an exhaust gas detector 7, and each test line is sequentially provided with The heating furnace 5 and the reactor 6 are provided with a valve III51 at the entrance of the heating furnace 5, a temperature flowmeter 61 is provided at the entrance of the reactor 6, and a valve IV62 is provided at the outlet, and the valve IV62 is connected with the The tail gas detector 7 is connected, and the valve III51 is connected with the main mixer 3 . The above-mentioned pre-mixer 2 is used to simulate the exhaust function of the marine engine, and the main mixer is used to simulate the function of the mixing chamber of the SCR system of the marine engine.
在本实施例中，所述反应器6至少包含三种，其中一种设有陶瓷内衬，用于腐蚀性气氛条件，一种用于非腐蚀性含水气氛条件，可采用高标号不锈钢材料例如316L制作，一种用于非腐蚀性干燥气氛条件，可采用任意标号不锈钢材料。In this embodiment, the reactor 6 includes at least three types, one of which is provided with a ceramic lining for corrosive atmosphere conditions, and one is used for non-corrosive water-containing atmosphere conditions, and high-grade stainless steel materials such as Made of 316L, it is used in non-corrosive dry atmosphere conditions, and any grade of stainless steel can be used.
上述管路的材质主要为不锈钢，部分为聚四氟乙烯。The material of the above-mentioned pipelines is mainly stainless steel, and some are polytetrafluoroethylene.
本实用新型的工作原理及过程：Working principle and process of the utility model:
使用时，催化剂置于反应器6中。首先根据评价条件进行配气，各气体流量通过阀门Ⅰ11进行调节，在预混合器2进行预混合，如果需要在反应气体中增添水汽，则通过水汽发生器4补入，混合后进入主混合器3进行混合。In use, the catalyst is placed in reactor 6. Firstly, the gas distribution is performed according to the evaluation conditions. The flow rate of each gas is adjusted through the valve I11, and premixed in the pre-mixer 2. If water vapor needs to be added to the reaction gas, it is added through the water vapor generator 4, and then enters the main mixer after mixing. 3 for mixing.
混合后的模拟尾气通过调节阀门Ⅲ51进入加热炉5，加热炉为外置结构，可实现不加热的功能，在进入反应器6前通过温度流量计确认气体的流量和温度，然后进入反应器6，在本实施例中，此系统设计了3个反应器，其中一个反应器是专门为硫老化试验设计的。The mixed simulated tail gas enters the heating furnace 5 through the regulating valve Ⅲ51. The heating furnace is an external structure, which can realize the function of no heating. Before entering the reactor 6, the flow rate and temperature of the gas are confirmed by the temperature flowmeter, and then enter the reactor 6 , In this embodiment, the system is designed with 3 reactors, one of which is specially designed for the sulfur aging test.
气体在反应器6中反应后进入尾气检测器7进行检测，通过对比反应前后的浓度计算SCR催化剂的转化效率。After the gas reacts in the reactor 6, it enters the tail gas detector 7 for detection, and the conversion efficiency of the SCR catalyst is calculated by comparing the concentrations before and after the reaction.
更加具体的工作原理及过程：More specific working principle and process:
应用时，将催化剂放置于反应器6中。模拟尾气各组分从气瓶1中输出，首先汇入预混器2进行混合。如模拟尾气中需要加入水汽，则由水汽发生器4提供含水气体(一般为氮气)接入预混器后管路，再进入主混器3进行充分混合。充分混合后的模拟尾气根据测试需要进入测试线路，模拟尾气在加热炉5的作用下加热至所需温度，随后进入相应反应器6，各测试线路之间并联，根据测试工况切换使用。例如，本次进行催化剂硫老化及性能测试，将催化剂装入设有陶瓷内衬的反应器，并开启所在测试线路上的阀门，关闭其他测试线路上的阀门，使模拟尾气从气瓶部分经过预混器2和主混器3，经过开启阀门测试线路上的加热炉5和温度流量计61后进入设有陶瓷内衬的反应器，最后经过尾气检测器7检测后排放。此时，关闭阀门的测试线路上的反应器6处于隔离状态，可以安装用于测试的催化剂。当催化剂硫老化完成后，不用停机，打开预定测试线路上的阀门，关闭当前测试线路上的阀门，调整气瓶部分的阀门11，即可测试预定反应器中的催化剂样品。不用停机，打开已完成测试的反应器，就可取出硫老化后的催化剂，并根据测试需要在未工作反应器中放置其他催化剂。When used, the catalyst is placed in the reactor 6. The components of the simulated exhaust gas are output from the cylinder 1, and firstly flow into the pre-mixer 2 for mixing. If water vapor needs to be added to the simulated tail gas, the water-containing gas (generally nitrogen) provided by the water vapor generator 4 is connected to the pipeline after the premixer, and then enters the main mixer 3 for thorough mixing. The fully mixed simulated tail gas enters the test line according to the test requirements. The simulated tail gas is heated to the required temperature under the action of the heating furnace 5, and then enters the corresponding reactor 6. The test lines are connected in parallel and switched according to the test working conditions. For example, for the catalyst sulfur aging and performance test, the catalyst is loaded into a reactor with a ceramic lining, and the valve on the test line is opened, and the valves on other test lines are closed, so that the simulated exhaust gas passes through the cylinder part The premixer 2 and the main mixer 3 enter the reactor with ceramic lining after opening the heating furnace 5 and the temperature flowmeter 61 on the valve test line, and finally discharge after being detected by the exhaust gas detector 7. At this time, the reactor 6 on the test line with the valve closed is in an isolated state, and the catalyst for testing can be installed. After the sulfur aging of the catalyst is completed, the catalyst sample in the predetermined reactor can be tested by opening the valve on the predetermined test line, closing the valve on the current test line, and adjusting the valve 11 of the gas cylinder without stopping the machine. Without shutting down, open the reactor that has completed the test, the sulfur-aged catalyst can be taken out, and other catalysts can be placed in the non-working reactor according to the test needs.

Claims (2)

  1. 一种船用发动机SCR催化剂性能评价系统，其特征在于，包括尾气模拟部分和测试部分，所述尾气模拟部分包括通过管路依次连接的气瓶部分、预混合器和主混合器，所述气瓶部分包括多个并列的气瓶，在每个所述气瓶的出口处设有一个阀门Ⅰ，在连接所述预混合器和所述主混合器的管路上接入有水汽发生器，在所述水汽发生器的出口处设有阀门Ⅱ；所述测试部分包括并联的多个测试线路和一个尾气检测器，在每个所述测试线路上依次设有加热炉和反应器，在所述加热炉的入口处设有阀门Ⅲ，在所述反应器的入口处设有温度流量计、出口处设有阀门Ⅳ，所述阀门Ⅳ与所述尾气检测器连接，所述阀门Ⅲ与所述主混合器连接。A marine engine SCR catalyst performance evaluation system is characterized in that it includes an exhaust gas simulation part and a test part, and the exhaust gas simulation part includes a gas cylinder part, a premixer and a main mixer connected in sequence through pipelines, and the gas cylinder Partly includes a plurality of parallel gas cylinders, a valve I is provided at the outlet of each gas cylinder, and a water vapor generator is connected to the pipeline connecting the pre-mixer and the main mixer. The outlet of the water vapor generator is provided with a valve II; the test part includes a plurality of test lines in parallel and an exhaust gas detector, each of the test lines is provided with a heating furnace and a reactor in turn, and the heating A valve III is provided at the entrance of the furnace, a temperature flowmeter is provided at the entrance of the reactor, and a valve IV is provided at the outlet, the valve IV is connected to the tail gas detector, and the valve III is connected to the main Mixer connection.
  2. 根据权利要求1所述的船用发动机SCR催化剂性能评价系统，其特征在于，所述反应器至少包含三种，其中一种设有陶瓷内衬。The marine engine SCR catalyst performance evaluation system according to claim 1, wherein the reactor comprises at least three types, one of which is provided with a ceramic lining.
PCT/CN2022/081874 2021-08-13 2022-03-20 Scr catalyst performance evaluation system for marine engine WO2023015888A1 (en)

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