技术领域technical field
本实用新型涉及柴油机尾气后处理技术领域，尤其涉及一种船机尾气后处理装置。The utility model relates to the technical field of post-treatment of diesel engine exhaust, in particular to a post-processing device for ship engine exhaust.
背景技术Background technique
随着国家非道路机械排放法规的颁布和施行，新的排放标准对船用发动机尾气污染物有了极其严格的标准，必须加装后处理装置来达到排放标准。目前最普遍的做法是使用选择性催化还原（SCR）催化器来降低NOx排放量，SCR催化器成为满足非道路排放的关键设备。然而，现有的船用发动机或者发动机组匹配的SCR催化器多为方形工业催化剂，存在占用空间大、催化剂难以固定、催化器无法承受较大的振动载荷等问题。With the promulgation and implementation of the national non-road machinery emission regulations, the new emission standards have extremely strict standards for marine engine exhaust pollutants, and after-treatment devices must be installed to meet the emission standards. The most common practice at present is to use selective catalytic reduction (SCR) catalysts to reduce NOx emissions, and SCR catalysts have become key equipment to meet off-road emissions. However, most of the existing SCR catalysts for marine engines or engine sets are square industrial catalysts, which have problems such as large space occupation, difficulty in fixing the catalyst, and inability of the catalyst to withstand large vibration loads.
因此，如何提供一种能够提高催化器振动载荷的船机尾气后处理装置成为本领域技术人员亟待解决的技术问题。Therefore, how to provide a ship engine exhaust after-treatment device capable of increasing the vibration load of the catalytic converter has become a technical problem to be solved urgently by those skilled in the art.
发明内容Contents of the invention
本实用新型旨在至少解决现有技术中存在的技术问题之一，提供一种船机尾气后处理装置，以解决现有技术中的问题。The utility model aims to solve at least one of the technical problems in the prior art, and provides a ship engine exhaust after-treatment device to solve the problems in the prior art.
作为本实用新型的一个方面，提供一种船机尾气后处理装置，其中，所述船机尾气后处理装置包括：氧化型催化器装置、选择性催化还原催化器装置和连接管，所述氧化型催化器装置和选择性催化还原器装置通过所述连接管连接，所述氧化性催化器装置为圆筒式结构，所述选择性催化还原催化器装置为三角形箱式结构，所述氧化型催化器装置远离所述连接管的一端设置有进气法兰和进气孔管，所述进气法兰位于所述进气孔管的一端，所述进气孔管的另一端位于所述氧化型催化器装置内，所述进气法兰和所述进气孔管形成组件将所述氧化型催化器装置与船用发动机组的排气口连接。As one aspect of the present invention, a ship engine exhaust after-treatment device is provided, wherein the ship engine exhaust after-treatment device includes: an oxidation catalyst device, a selective catalytic reduction catalyst device and a connecting pipe, the oxidation Type catalytic converter device and selective catalytic reduction device are connected through the connecting pipe, the oxidation catalytic converter device is a cylindrical structure, the selective catalytic reduction catalytic converter device is a triangular box structure, the oxidation type One end of the catalytic converter device away from the connecting pipe is provided with an air inlet flange and an air inlet pipe, the air inlet flange is located at one end of the air inlet pipe, and the other end of the air inlet pipe is located at the In the oxidation catalytic converter device, the intake flange and the intake hole pipe forming component connect the oxidation catalytic converter device with the exhaust port of the marine engine unit.
优选地，所述氧化型催化器装置包括DOC前端盖、DOC筒体和DOC后端盖，所述DOC筒体靠近所述进气孔管的一端连接所述DOC前端盖，所述DOC筒体靠近所述连接管的一端连接所述DOC后端盖，所述DOC前端盖上设置第一通孔，所述进气孔管贯穿所述第一通孔设置，所述DOC后端盖上设置第二通孔，所述连接管与所述第二通孔连通。Preferably, the oxidation-type catalytic converter device includes a DOC front end cover, a DOC cylinder and a DOC rear end cover, the end of the DOC cylinder close to the air inlet pipe is connected to the DOC front end cover, and the DOC cylinder One end close to the connecting pipe is connected to the DOC rear end cover, the DOC front end cover is provided with a first through hole, the air inlet pipe is arranged through the first through hole, and the DOC rear end cover is provided with A second through hole, the connecting pipe communicates with the second through hole.
优选地，所述氧化型催化器装置还包括催化剂载体和DOC载体衬垫，所述催化剂载体位于所述DOC筒体内部，所述DOC载体衬垫位于所述催化剂载体与所述DOC筒体的内壁之间。Preferably, the oxidation catalyst device further includes a catalyst carrier and a DOC carrier gasket, the catalyst carrier is located inside the DOC cylinder, and the DOC carrier gasket is located between the catalyst carrier and the DOC cylinder between the inner walls.
优选地，所述选择性催化还原装置包括SCR前端盖、SCR后端盖、SCR三角形箱体和出气管，所述SCR三角形箱体靠近所述连接管的一端连接所述SCR前端盖，所述SCR三角形箱体的另一端连接所述SCR后端盖，所述SCR前端盖上设置有第三通孔，所述第三通孔与所述连接管连通，所述SCR后端盖上设置有第四通孔，所述第四通孔与所述出气管连通。Preferably, the selective catalytic reduction device includes an SCR front end cover, an SCR rear end cover, an SCR triangular box and an outlet pipe, and one end of the SCR triangular box close to the connecting pipe is connected to the SCR front end cover, the The other end of the SCR triangular box is connected to the SCR rear end cover, the SCR front end cover is provided with a third through hole, the third through hole communicates with the connecting pipe, and the SCR rear end cover is provided with A fourth through hole, the fourth through hole communicates with the air outlet pipe.
优选地，所述选择性催化还原装置还包括并联设置于所述SCR三角形箱体内的SCR第一组件、SCR第二组件和SCR第三组件，所述SCR第一组件、SCR第二组件和SCR第三组件能够共同完成NOx的转化和处理。Preferably, the selective catalytic reduction device further includes a first SCR assembly, a second SCR assembly and a third SCR assembly arranged in parallel in the SCR triangular box, the first SCR assembly, the second SCR assembly and the SCR The third component can jointly complete the conversion and treatment of NOx.
优选地，所述SCR第一组件包括SCR第一筒体和位于所述SCR第一筒体内的SCR催化剂和ASC催化剂，所述SCR催化剂与所述SCR第一筒体的内壁之间设置SCR载体衬垫，所述SCR第二组件包括SCR第二筒体，所述SCR第三组件包括SCR第三筒体，所述SCR第一筒体、SCR第二筒体和SCR第三筒体并联设置。Preferably, the first SCR assembly includes a first SCR cylinder, an SCR catalyst and an ASC catalyst located in the first SCR cylinder, and an SCR carrier is arranged between the SCR catalyst and the inner wall of the first SCR cylinder As for the gasket, the second SCR assembly includes a second SCR cylinder, the third SCR assembly includes a third SCR cylinder, and the first SCR cylinder, the second SCR cylinder, and the third SCR cylinder are arranged in parallel .
优选地，所述选择性催化还原装置还包括SCR前隔板和SCR后隔板，所述SCR前隔板和所述SCR后隔板分别设置在所述SCR第一筒体、SCR第二筒体和SCR第三筒体的两端，所述SCR前隔板和所述SCR后隔板上均设置有三个通孔，所述SCR第一筒体、SCR第二筒体和SCR第三筒体的两端分别与所述SCR前隔板和所述SCR后隔板上的通孔连通。Preferably, the selective catalytic reduction device further includes an SCR front partition and an SCR rear partition, and the SCR front partition and the SCR rear partition are respectively arranged on the SCR first cylinder and the SCR second cylinder. body and the two ends of the SCR third cylinder, the SCR front partition and the SCR rear partition are provided with three through holes, the SCR first cylinder, the SCR second cylinder and the SCR third cylinder The two ends of the body communicate with the through holes on the SCR front partition and the SCR rear partition respectively.
优选地，所述选择性催化还原装置还包括NOx传感器，所述NOx传感器设置在所述出气管上。Preferably, the selective catalytic reduction device further includes a NOx sensor, and the NOx sensor is arranged on the gas outlet pipe.
优选地，所述船机尾气后处理装置还包括设置在所述连接管上的气助式尿素喷嘴、连接法兰和温度传感器，以及与所述连接管连接的连接孔管，所述连接孔管位于所述选择性催化还原催化器装置内，所述气助式尿素喷嘴、连接法兰、温度传感器、连接孔管和连接管共同形成组件，能够完成尿素水溶液的喷射以及废气和尿素水溶液的混合。Preferably, the ship engine exhaust after-treatment device also includes an air-assisted urea nozzle, a connecting flange and a temperature sensor arranged on the connecting pipe, and a connecting hole pipe connected to the connecting pipe, and the connecting hole The pipe is located in the selective catalytic reduction catalyst device, and the gas-assisted urea nozzle, connecting flange, temperature sensor, connecting hole pipe and connecting pipe together form an assembly, which can complete the injection of urea aqueous solution and the injection of exhaust gas and urea aqueous solution. mix.
本实用新型提供的船机尾气后处理装置，通过前级DOC装置采用圆筒式，SCR装置采用三角形箱式结构，方便在船上安装，结构紧凑可靠，装配通用性好，用一体并联式结构设计解决了方形工业催化剂无法耐较高振动载荷的问题，降低了后处理装置的背压同时保证了尿素的混合效果。The ship engine exhaust post-processing device provided by the utility model adopts a cylindrical type through the front-stage DOC device, and the SCR device adopts a triangular box-type structure, which is convenient to install on the ship. The structure is compact and reliable, and the assembly versatility is good. It is designed with an integrated parallel structure. It solves the problem that the square industrial catalyst cannot withstand high vibration load, reduces the back pressure of the post-processing device and ensures the mixing effect of urea.
附图说明Description of drawings
附图是用来提供对本实用新型的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本实用新型，但并不构成对本实用新型的限制。在附图中：The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, together with the following specific embodiments, are used to explain the utility model, but do not constitute a limitation to the utility model. In the attached picture:
图1为本实用新型提供的船机尾气后处理装置的立体结构示意图。Fig. 1 is a three-dimensional structural schematic diagram of a ship engine exhaust after-treatment device provided by the utility model.
图2为本实用新型提供的船机尾气后处理装置的剖视图。Fig. 2 is a cross-sectional view of the ship engine exhaust after-treatment device provided by the utility model.
图3为本实用新型提供的船机尾气后处理装置的左视图。Fig. 3 is a left view of the ship engine exhaust after-treatment device provided by the utility model.
图4为本实用新型提供的SCR组件的结构示意图。Fig. 4 is a schematic structural diagram of the SCR assembly provided by the present invention.
图5为本实用新型提供的船机尾气后处理装置的主视图。Fig. 5 is a front view of the ship engine exhaust after-treatment device provided by the utility model.
具体实施方式Detailed ways
以下结合附图对本实用新型的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本实用新型，并不用于限制本实用新型。The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.
需要说明的是，氧化型催化器（Diesel Oxidation Catalyst，简称DOC），选择性催化还原催化器（Selective Catalytic Reduction，简称SCR）。It should be noted that the oxidation catalyst (Diesel Oxidation Catalyst, referred to as DOC), the selective catalytic reduction catalyst (Selective Catalytic Reduction, referred to as SCR).
作为本实用新型的一个方面，提供一种船机尾气后处理装置，其中，如图1和图2所示，所述船机尾气后处理装置100包括：氧化型催化器装置110、选择性催化还原催化器装置120和连接管9，所述氧化型催化器装置110和选择性催化还原器装置120通过所述连接管9连接，所述氧化性催化器装置110为圆筒式结构，所述选择性催化还原催化器装置120为三角形箱式结构，所述氧化型催化器装置110远离所述连接管9的一端设置有进气法兰1和进气孔管2，所述进气法兰1位于所述进气孔管2的一端，所述进气孔管2的另一端位于所述氧化型催化器装置110内，所述进气法兰1和所述进气孔管2形成组件将所述氧化型催化器装置110与船用发动机组的排气口连接。As one aspect of the present invention, a ship engine exhaust after-treatment device is provided, wherein, as shown in Figure 1 and Figure 2, the ship engine exhaust after-treatment device 100 includes: an oxidation catalyst device 110, a selective catalytic The reduction catalyst device 120 and the connecting pipe 9, the oxidation catalyst device 110 and the selective catalytic reduction device 120 are connected through the connection pipe 9, the oxidation catalyst device 110 is a cylindrical structure, the The selective catalytic reduction catalyst device 120 is a triangular box structure, and the end of the oxidation catalyst device 110 away from the connecting pipe 9 is provided with an air inlet flange 1 and an air inlet pipe 2, and the air inlet flange 1 is located at one end of the air intake pipe 2, and the other end of the air intake pipe 2 is located in the oxidation catalyst device 110, and the air intake flange 1 and the air intake pipe 2 form an assembly The oxidation catalyst device 110 is connected to the exhaust port of the marine engine unit.
本实用新型提供的船机尾气后处理装置，通过前级DOC装置采用圆筒式，SCR装置采用三角形箱式结构，方便在船上安装，结构紧凑可靠，装配通用性好，用一体并联式结构设计解决了方形工业催化剂无法耐较高振动载荷的问题，降低了后处理装置的背压同时保证了尿素的混合效果。The ship engine exhaust post-processing device provided by the utility model adopts a cylindrical type through the front-stage DOC device, and the SCR device adopts a triangular box-type structure, which is convenient to install on the ship. The structure is compact and reliable, and the assembly versatility is good. It is designed with an integrated parallel structure. It solves the problem that the square industrial catalyst cannot withstand high vibration load, reduces the back pressure of the post-processing device and ensures the mixing effect of urea.
具体地，如图2所示，所述氧化型催化器装置110包括DOC前端盖3、DOC筒体4和DOC后端盖7，所述DOC筒体4靠近所述进气孔管2的一端连接所述DOC前端盖3，所述DOC筒体4靠近所述连接管9的一端连接所述DOC后端盖7，所述DOC前端盖3上设置第一通孔，所述进气孔管2贯穿所述第一通孔设置，所述DOC后端盖7上设置第二通孔，所述连接管9与所述第二通孔连通。Specifically, as shown in FIG. 2 , the oxidation catalyst device 110 includes a DOC front cover 3 , a DOC cylinder 4 and a DOC rear end cover 7 , and the DOC cylinder 4 is close to one end of the air intake pipe 2 Connect the DOC front end cover 3, the DOC cylinder body 4 is connected to the DOC rear end cover 7 at one end close to the connecting pipe 9, the DOC front end cover 3 is provided with a first through hole, and the air inlet pipe 2 is set through the first through hole, the DOC rear end cover 7 is provided with a second through hole, and the connecting pipe 9 communicates with the second through hole.
具体地，所述氧化型催化器装置110还包括催化剂载体6和DOC载体衬垫5，所述催化剂载体6位于所述DOC筒体4内部，所述DOC载体衬垫5位于所述催化剂载体6与所述DOC筒体4的内壁之间。Specifically, the oxidation catalyst device 110 also includes a catalyst carrier 6 and a DOC carrier gasket 5, the catalyst carrier 6 is located inside the DOC cylinder 4, and the DOC carrier gasket 5 is located on the catalyst carrier 6 and the inner wall of the DOC cylinder 4.
具体地，如图2和图3所示，所述选择性催化还原装置120包括SCR前端盖12、SCR后端盖22、SCR三角形箱体15和出气管24，所述SCR三角形箱体15靠近所述连接管9的一端连接所述SCR前端盖12，所述SCR三角形箱体15的另一端连接所述SCR后端盖22，所述SCR前端盖12上设置有第三通孔，所述第三通孔与所述连接管9连通，所述SCR后端盖22上设置有第四通孔，所述第四通孔与所述出气管24连通。Specifically, as shown in Figures 2 and 3, the selective catalytic reduction device 120 includes an SCR front end cover 12, an SCR rear end cover 22, an SCR triangular box 15 and an air outlet pipe 24, and the SCR triangular box 15 is close to One end of the connecting pipe 9 is connected to the SCR front end cover 12, the other end of the SCR triangular box 15 is connected to the SCR rear end cover 22, the SCR front end cover 12 is provided with a third through hole, the The third through hole communicates with the connecting pipe 9 , and the SCR rear end cover 22 is provided with a fourth through hole, and the fourth through hole communicates with the air outlet pipe 24 .
具体地，如图4所示，所述选择性催化还原装置120还包括并联设置于所述SCR三角形箱体内的SCR第一组件、SCR第二组件和SCR第三组件，所述SCR第一组件、SCR第二组件和SCR第三组件能够共同完成NOx的转化和处理。Specifically, as shown in FIG. 4 , the selective catalytic reduction device 120 further includes a first SCR assembly, a second SCR assembly and a third SCR assembly arranged in parallel in the SCR triangular box, and the first SCR assembly , the second SCR component and the third SCR component can jointly complete the conversion and treatment of NOx.
具体地，如图2所示，所述SCR第一组件包括SCR第一筒体16和位于所述SCR第一筒体16内的SCR催化剂18和ASC催化剂19，所述SCR催化剂18与所述SCR第一筒体16的内壁之间设置SCR载体衬垫17，所述SCR第二组件包括SCR第二筒体，所述SCR第三组件包括SCR第三筒体，所述SCR第一筒体、SCR第二筒体和SCR第三筒体并联设置。Specifically, as shown in FIG. 2, the first SCR assembly includes a first SCR cylinder 16, an SCR catalyst 18 and an ASC catalyst 19 located in the first SCR cylinder 16, and the SCR catalyst 18 and the An SCR carrier gasket 17 is arranged between the inner walls of the first SCR cylinder 16, the second SCR assembly includes a second SCR cylinder, the third SCR assembly includes a third SCR cylinder, and the first SCR cylinder , the second cylinder of the SCR and the third cylinder of the SCR are arranged in parallel.
需要说明的是，所述SCR第二筒体和所述SCR第三筒体在图2中均以附图标记20表示。It should be noted that both the second SCR cylinder and the third SCR cylinder are denoted by reference numeral 20 in FIG. 2 .
具体地，如图4所示，所述选择性催化还原装置120还包括SCR前隔板14和SCR后隔板21，所述SCR前隔板14和所述SCR后隔板21分别设置在所述SCR第一筒体16、SCR第二筒体和SCR第三筒体的两端，所述SCR前隔板和所述SCR后隔板上均设置有三个通孔，所述SCR第一筒体、SCR第二筒体和SCR第三筒体的两端分别与所述SCR前隔板和所述SCR后隔板上的通孔连通。Specifically, as shown in FIG. 4 , the selective catalytic reduction device 120 also includes an SCR front partition 14 and an SCR rear partition 21 , and the SCR front partition 14 and the SCR rear partition 21 are respectively arranged on the The two ends of the SCR first cylinder 16, the SCR second cylinder and the SCR third cylinder, the SCR front partition and the SCR rear partition are provided with three through holes, the SCR first cylinder Two ends of the SCR body, the SCR second cylinder and the SCR third cylinder communicate with the through holes on the SCR front partition and the SCR rear partition respectively.
具体地，如图2和图5所示，所述选择性催化还原装置120还包括NOx传感器23，所述NOx传感器23设置在所述出气管24上。Specifically, as shown in FIG. 2 and FIG. 5 , the selective catalytic reduction device 120 further includes a NOx sensor 23 , and the NOx sensor 23 is arranged on the gas outlet pipe 24 .
具体地，如图2和图5所示，所述船机尾气后处理装置100还包括设置在所述连接管9上的气助式尿素喷嘴8、连接法兰10和温度传感器11，以及与所述连接管9连接的连接孔管13，所述连接孔管13位于所述选择性催化还原催化器装置120内，所述气助式尿素喷嘴9、连接法兰10、温度传感器11、连接孔管13和连接管9共同形成组件，能够完成尿素水溶液的喷射以及废气和尿素水溶液的混合。Specifically, as shown in Figures 2 and 5, the ship engine exhaust after-treatment device 100 also includes an air-assisted urea nozzle 8, a connecting flange 10 and a temperature sensor 11 arranged on the connecting pipe 9, and The connecting hole pipe 13 connected by the connecting pipe 9, the connecting hole pipe 13 is located in the selective catalytic reduction catalyst device 120, the gas-assisted urea nozzle 9, the connecting flange 10, the temperature sensor 11, the connecting The orifice pipe 13 and the connecting pipe 9 jointly form an assembly, which can complete the spraying of the urea aqueous solution and the mixing of the exhaust gas and the urea aqueous solution.
因此，本实用新型提供的船机尾气后处理装置，具有以下优势：Therefore, the ship engine exhaust after-treatment device provided by the utility model has the following advantages:
1.前级DOC装置采用圆筒式，SCR装置采用三角形箱式结构，方便在船上安装，结构紧凑可靠，装配通用性好；1. The pre-stage DOC device adopts a cylindrical type, and the SCR device adopts a triangular box-type structure, which is convenient to install on board, has a compact and reliable structure, and has good assembly versatility;
2.通过SCR还原污染物中的NOx等污染物，使得整个尾气后处理能将尾气处理到满足非道路国三排放标准；2. Reducing NOx and other pollutants in the pollutants through SCR, so that the entire exhaust gas post-treatment can treat the exhaust gas to meet the non-road National III emission standards;
3.以往船机后处理装置常采用方形催化剂载体，存在后处理装置尺寸较大、催化剂无法可靠固定等问题。本实用新型SCR采用圆形300目催化剂，方便直接塞入不锈钢圆筒，保证了催化剂载体的振动可靠性，且缩小了后处理装置的体积；3. In the past, square catalyst carriers were often used in post-processing devices of marine engines. There were problems such as large size of post-processing devices and unreliable fixing of catalysts. The SCR of the utility model adopts a circular 300-mesh catalyst, which is conveniently directly inserted into the stainless steel cylinder, ensures the vibration reliability of the catalyst carrier, and reduces the volume of the post-processing device;
4.方形催化剂载体通常存在NH3在催化剂载体端面分布不均匀的问题，本实用新型采用圆形催化剂载体一体并联结构，能够大大提高尿素分解成NH3后的分布均匀性；4. The square catalyst carrier usually has the problem of uneven distribution of NH3 on the end surface of the catalyst carrier. The utility model adopts the integrated parallel structure of the circular catalyst carrier, which can greatly improve the distribution uniformity of urea after it is decomposed into NH3;
5.三组圆形SCR催化剂一体并联布置，相比常规串联布置，大大降低了后处理装置的整体背压。5. Three sets of circular SCR catalysts are arranged in parallel, which greatly reduces the overall back pressure of the post-processing device compared with the conventional series arrangement.
下面结合图2对本实用新型提供的船机尾气后处理装置的工作过程进行详细说明。The working process of the ship engine exhaust after-treatment device provided by the utility model will be described in detail below in conjunction with FIG. 2 .
如图2所示，进气法兰1和进气孔管2形成组件，连接船用发动机组的排气口和DOC装置。进气孔管2配合DOC筒体4形成一个混合腔，提高废气再DOC催化剂载体6前端面的流速分布均匀性。其次DOC装置前端盖3、以及DOC装置后端盖7将DOC装置共同保证了DOC装置的气密性，使废气难以泄露。DOC载体衬垫5对DOC催化剂载体6有固定和缓冲冲击的作用，同时DOC载体衬垫还起到保温作用，降低DOC催化剂载体上的热损失。DOC催化剂载体6在本系统中主要是将船机废气中的NO转化为NO2，从而提高SCR装置中的快速反应占比，提高本装置对NOx的转化效率。As shown in Fig. 2, the intake flange 1 and the intake port pipe 2 form an assembly to connect the exhaust port of the marine engine unit and the DOC device. The air inlet pipe 2 cooperates with the DOC cylinder 4 to form a mixing chamber, which improves the uniformity of the flow velocity distribution of the exhaust gas on the front surface of the DOC catalyst carrier 6 . Secondly, the front end cover 3 of the DOC device and the rear end cover 7 of the DOC device jointly ensure the airtightness of the DOC device, making it difficult for exhaust gas to leak. The DOC carrier liner 5 has the function of fixing and buffering the DOC catalyst carrier 6, and at the same time, the DOC carrier liner also plays a role of heat preservation, reducing the heat loss on the DOC catalyst carrier. In this system, the DOC catalyst carrier 6 mainly converts NO in the exhaust gas of the marine engine into NO2, thereby increasing the proportion of rapid reaction in the SCR device and improving the conversion efficiency of the device to NOx.
气助式尿素喷嘴8和连接管9、连接法兰10以及连接孔管11共同形成组件，完成尿素水溶液的喷射以及废气和尿素水溶液的混合，能够极大的提高尿素的分解速率，提升NH3的混合均匀性，和分布均匀性。SCR装置前隔板14和SCR后隔板21起到支撑SCR筒体16的作用。SCR装置前端盖12、SCR箱体15、SCR后端盖22共同形成一个箱体组件，保证了3个SCR筒体并联布置。SCR筒体16、SCR载体衬垫17、SCR催化剂载体18以及ASC催化剂载体19共同形成SCR组件1，且整个SCR箱体15中共有三个相同的SCR组件（SCR组件1、SCR组件2及SCR组件3，如图4所示）并联，共同完成NOx的转化和处理。其中ASC催化剂载体19起到清除没有转化的NH3，从而满足非道路国四排放标准。The air-assisted urea nozzle 8, the connecting pipe 9, the connecting flange 10 and the connecting hole pipe 11 form an assembly together to complete the spraying of the urea aqueous solution and the mixing of the exhaust gas and the urea aqueous solution, which can greatly increase the decomposition rate of urea and increase the NH3 concentration. Mixing uniformity, and distribution uniformity. The front partition 14 of the SCR device and the rear partition 21 of the SCR function to support the SCR cylinder 16 . The front end cover 12 of the SCR device, the SCR box body 15, and the SCR rear end cover 22 jointly form a box assembly, which ensures that three SCR cylinders are arranged in parallel. The SCR cylinder 16, the SCR carrier gasket 17, the SCR catalyst carrier 18 and the ASC catalyst carrier 19 together form the SCR assembly 1, and there are three identical SCR assemblies (SCR assembly 1, SCR assembly 2 and SCR assembly 3, as shown in Figure 4) in parallel to complete the conversion and treatment of NOx. Among them, the ASC catalyst carrier 19 can remove unconverted NH3, so as to meet the non-road China IV emission standard.
因此，本实用新型提供的船机尾气后处理装置采用圆形催化剂载体并联布置，结构紧凑布置，压力损失小；圆形催化剂载体配合载体衬垫的封装结构大大提高了后处理装置对振动的耐受程度，提高了后处理装置的可靠性；采用混合孔管的方式提高了气流流速均匀性、废气和尿素的混合均匀性，起到了低成本，高性能的效果。Therefore, the marine engine exhaust post-processing device provided by the utility model adopts the parallel arrangement of the circular catalyst carrier, which has a compact structure and small pressure loss; the package structure of the circular catalyst carrier and the carrier liner greatly improves the post-processing device's resistance to vibration. The degree of acceptance improves the reliability of the post-processing device; the use of the mixing hole tube improves the uniformity of the air flow velocity and the mixing uniformity of the exhaust gas and urea, which has the effect of low cost and high performance.
可以理解的是，以上实施方式仅仅是为了说明本实用新型的原理而采用的示例性实施方式，然而本实用新型并不局限于此。对于本领域内的普通技术人员而言，在不脱离本实用新型的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本实用新型的保护范围。It can be understood that, the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these variations and improvements are also regarded as the protection scope of the present utility model.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820461768.2UCN208122918U (en) | 2018-04-03 | 2018-04-03 | A kind of ship tail gas after-treatment device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820461768.2UCN208122918U (en) | 2018-04-03 | 2018-04-03 | A kind of ship tail gas after-treatment device |
| Publication Number | Publication Date |
|---|---|
| CN208122918Utrue CN208122918U (en) | 2018-11-20 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820461768.2UExpired - Fee RelatedCN208122918U (en) | 2018-04-03 | 2018-04-03 | A kind of ship tail gas after-treatment device |
| Country | Link |
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| CN (1) | CN208122918U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255550A (en)* | 2020-01-21 | 2020-06-09 | 中国重汽集团济南动力有限公司 | Diesel oil state six post-processor assembly |
| CN111663987A (en)* | 2020-06-05 | 2020-09-15 | 合肥神舟催化净化器股份有限公司 | Automobile exhaust catalytic purification device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255550A (en)* | 2020-01-21 | 2020-06-09 | 中国重汽集团济南动力有限公司 | Diesel oil state six post-processor assembly |
| CN111663987A (en)* | 2020-06-05 | 2020-09-15 | 合肥神舟催化净化器股份有限公司 | Automobile exhaust catalytic purification device |
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| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20181120 |