CN108561210A - 船用柴油机污染物排放处理*** - Google Patents
船用柴油机污染物排放处理*** Download PDFInfo
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—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
- F01N3/0233—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 periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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Abstract
本发明公开了一种船用柴油机污染物排放处理***,包括:压气机、中冷器、气缸、船舶主机、连续再生催化型颗粒物捕集器、涡轮机、脱硝装置和湿式洗涤脱硫装置;船舶主机废气经排气总管进入连续再生催化型颗粒物捕集器除去废气中未完全燃烧的黑炭,再通过涡轮机驱动涡轮的运转,涡轮机带动压气机工作,压缩进入气缸的空气,之后废气进入脱硝装置将废气中的氮氧化物转化成无害的氮气和水蒸气,此后废气在经过湿式洗涤脱硫装置除掉废气中的硫元素然后排入大气,这时的废气已经非常清洁。
Description
技术领域
本发明涉及适用燃用重质残渣油柴油机的尾气处理技术领域,具体涉及一种船用柴油机污染物排放处理***。
背景技术
所知的已有技术的技术是将船舶废气接入DPF(Diesel Particulate Filter) 装置,其中再生方法有电加热技术方法,即通过给DPF装置通电加热除掉捕集的颗粒物。还有喷油助燃再生方法,即在DPF入口处设置燃烧器,喷入柴油和二次空气,燃烧后引燃颗粒进行再生。经过DPF的气体再一次通过涡轮机、除硝除硫装置。
上述这些再生方法都属于断续强制加热再生方法,需要消耗电能或燃料,使得柴油机燃油经济性变差。同时需要一套复杂的控制***,使得生产投入成本增加。
发明内容
本发明针对上述技术问题,提出一种船用柴油机污染物排放处理***。
为达到以上目的,通过以下技术方案实现的:
船用柴油机污染物排放处理***,包括:压气机、中冷器、气缸、船舶主机、连续再生催化型颗粒物捕集器、涡轮机、脱硝装置和湿式洗涤脱硫装置;
压气机是由涡轮机带动工作,压气机通过输出管路用于给中冷器供气;
中冷器输出管路用于给船舶主机供气;
船舶主机的废气输出管路与连续再生催化型颗粒物捕集器入口连接;
连续再生催化型颗粒物捕集器的输出管路用于给涡轮机供气;
其中,涡轮机排出废气依次经过脱硝装置和湿式洗涤脱硫装置最终排出;
连续再生催化型颗粒物捕集器包括:船舶主机的排气总管道连接的进气口,接于进气口输出端的喷雾管腔,设置于喷雾管腔顶部的喷射清除剂的雾化喷嘴,过滤体和脉冲反吹喷嘴;
喷雾管腔的设置大于等于1个出口,且每一个出口均设置有一个过滤体;
过滤体为壁流型过滤体,过滤体的流道内壁为碳化硅球形颗粒烧结壁面;
其中,连续再生催化型颗粒物捕集器的腔体内位于过滤体出口相对方向设置有脉冲反吹喷嘴,脉冲反吹喷嘴另一端与高压气管连接。
采用上述技术方案的本发明,其工作流程以及原理:
船舶主机废气经排气总管进入连续再生催化型颗粒物捕集器(Catalytic DieselParticulate Filter),CDPF(连续再生催化型颗粒物捕集器)安装于废气涡轮增压器与柴油机排气总管之间,这样可保证用于维持CDPF黑炭启动催化再生的温度条件;通过改变过滤体壁流型通道微观结构和催化剂涂覆方式,提高附着壁面黑炭催化转化效率与抑制硫中毒失效的能力;通过激发排气中黑炭颗粒、CO、HC及NO等不同成分之间的催化氧化,使化学反应产生的热量用于补偿柴油机排气流通CDPF(连续再生催化型颗粒物捕集器)产生的流动损失,有利于实现柴油机与后续选择性催化还原(SCR)脱硝装置之间的匹配关系;采用脉冲高压空气吹扫和颗粒清除溶液喷射两者协同方式清除粘结在过滤体通道壁面上的颗粒沉积物。每个过滤体进出口位置布置压力传感器,测定其颗粒物阻塞状况。当过滤体进出口流动损失超过极限值,说明过滤体内颗粒物已经超过临界值,需要清除。这时,整个装置的进、排气口关闭,脉冲反吹喷嘴工作,实现清除过滤体内颗粒物脉冲反吹工作流程。经过一段反吹后,过滤体的排气段阀门半开,清除剂喷射雾化***喷射溶液雾滴,排气携带溶液雾滴的排气进入过滤体内,使得清除剂溶液均匀分布到过滤体壁流通道壁面上并润湿附着颗粒,此时,过滤体处于清除剂溶液喷射工作流程。过滤体内间歇工作在脉冲反吹工作流程和清除剂溶液喷射工作流程中。为了提高柴油机废气处理效率排气总管可连接多个CDPF(连续再生催化型颗粒物捕集器)单元选择性工作。通过 CDPF(连续再生催化型颗粒物捕集器)的废气流过涡轮机后进入(SCR)脱硝装置。(SCR)装置是通过向废气中喷射尿素等还原剂,并在催化剂的作用下可在较低温度下与废气中的氮氧化物发生反应并生成无害的氮气和水蒸气。之后废气通过湿式洗涤脱硫装置除掉废气中的硫元素然后排入大气,这时的废气已经非常清洁,整个过程无需额外耗能。
综上发明采用连续催化方法。连续催化再生是在催化剂的作用下,柴油机排放的颗粒物在较低的温度下实现催化转化再生。与断续强制加热再生方法相比,连续催化再生方法具有结构简单,不需要外加能量经济性好、废气排放更加清洁等优点。
上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,而可依照说明书的内容予以实施,并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂,以下特举较佳实施例,并配合附图,详细说明如下。
附图说明
本发明共2幅附图,其中:
图1为本发明的整体结构布局示意图。
图中:
1、压气机,2、中冷器,3、气缸,4、船舶主机,5、连续再生催化型颗粒物捕集器,6、涡轮机,7、脱硝装置,8、湿式洗涤脱硫装置。
具体实施方式
如图1所示的一种船用柴油机污染物排放处理***,包括:压气机1、中冷器2、气缸3、船舶主机4、连续再生催化型颗粒物捕集器5、涡轮机6、脱硝装置7和湿式洗涤脱硫装置8;
压气机1是由涡轮机6带动工作,压气机1通过输出管路用于给中冷器2 供气;
中冷器2输出管路用于给船舶主机4供气;
船舶主机4的废气输出管路与连续再生催化型颗粒物捕集器5入口连接;
连续再生催化型颗粒物捕集器5的输出管路用于给涡轮机6供气;
其中,涡轮机6排出废气依次经过脱硝装置7和湿式洗涤脱硫装置8最终排出;
连续再生催化型颗粒物捕集器5包括:船舶主机4的排气总管道连接的进气口,接于进气口输出端的喷雾管腔,设置于喷雾管腔顶部的喷射清除剂的雾化喷嘴,过滤体和脉冲反吹喷嘴;
喷雾管腔的设置大于等于1个出口,且每一个出口均设置有一个过滤体;
过滤体为壁流型过滤体,过滤体的流道内壁为碳化硅球形颗粒烧结壁面;
其中,连续再生催化型颗粒物捕集器5的腔体内位于过滤体出口相对方向设置有脉冲反吹喷嘴,脉冲反吹喷嘴另一端与高压气管连接。
采用上述技术方案的本发明,其工作流程以及原理:
船舶主机废气经排气总管进入连续再生催化型颗粒物捕集器(Catalytic DieselParticulate Filter),CDPF(连续再生催化型颗粒物捕集器)安装于废气涡轮增压器与柴油机排气总管之间,这样可保证用于维持CDPF黑炭启动催化再生的温度条件;通过改变过滤体壁流型通道微观结构和催化剂涂覆方式,提高附着壁面黑炭催化转化效率与抑制硫中毒失效的能力;通过激发排气中黑炭颗粒、CO、HC及NO等不同成分之间的催化氧化,使化学反应产生的热量用于补偿柴油机排气流通CDPF(连续再生催化型颗粒物捕集器)产生的流动损失,有利于实现柴油机与后续选择性催化还原(SCR)脱硝装置之间的匹配关系;采用脉冲高压空气吹扫和颗粒清除溶液喷射两者协同方式清除粘结在过滤体通道壁面上的颗粒沉积物。每个过滤体进出口位置布置压力传感器,测定其颗粒物阻塞状况。当过滤体进出口流动损失超过极限值,说明过滤体内颗粒物已经超过临界值,需要清除。这时,整个装置的进、排气口关闭,脉冲反吹喷嘴工作,实现清除过滤体内颗粒物脉冲反吹工作流程。经过一段反吹后,过滤体的排气段阀门半开,清除剂喷射雾化***喷射溶液雾滴,排气携带溶液雾滴的排气进入过滤体内,使得清除剂溶液均匀分布到过滤体壁流通道壁面上并润湿附着颗粒,此时,过滤体处于清除剂溶液喷射工作流程。过滤体内间歇工作在脉冲反吹工作流程和清除剂溶液喷射工作流程中。为了提高柴油机废气处理效率排气总管可连接多个CDPF(连续再生催化型颗粒物捕集器)单元选择性工作。通过 CDPF(连续再生催化型颗粒物捕集器)的废气流过涡轮机后进入(SCR)脱硝装置。(SCR)装置是通过向废气中喷射尿素等还原剂,并在催化剂的作用下可在较低温度下与废气中的氮氧化物发生反应并生成无害的氮气和水蒸气。之后废气通过湿式洗涤脱硫装置除掉废气中的硫元素然后排入大气,这时的废气已经非常清洁,整个过程无需额外耗能。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容做出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所做的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (1)
1.船用柴油机污染物排放处理***,其特征在于,包括:压气机(1)、中冷器(2)、气缸(3)、船舶主机(4)、连续再生催化型颗粒物捕集器(5)、涡轮机(6)、脱硝装置(7)和湿式洗涤脱硫装置(8);
所述压气机(1)是由涡轮机(6)带动工作,压气机(1)通过输出管路用于给中冷器(2)供气;
所述中冷器(2)输出管路用于给船舶主机(4)供气;
所述船舶主机(4)的废气输出管路与连续再生催化型颗粒物捕集器(5)入口连接;
所述连续再生催化型颗粒物捕集器(5)的输出管路用于给涡轮机(6)供气;
其中,涡轮机(6)排出废气依次经过脱硝装置(7)和湿式洗涤脱硫装置(8)最终排出;
所述连续再生催化型颗粒物捕集器(5)包括:船舶主机(4)的排气总管道连接的进气口,接于进气口输出端的喷雾管腔,设置于喷雾管腔顶部的喷射清除剂的雾化喷嘴,过滤体和脉冲反吹喷嘴;
所述喷雾管腔的设置大于等于1个出口,且每一个出口均设置有一个过滤体;
所述过滤体为壁流型过滤体,过滤体的流道内壁为碳化硅球形颗粒烧结壁面;
其中,连续再生催化型颗粒物捕集器(5)的腔体内位于过滤体出口相对方向设置有脉冲反吹喷嘴,脉冲反吹喷嘴另一端与高压气管连接。
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