CN107989676A - 一种利用hp-scr技术的船舶动力设备废气排放装置 - Google Patents
一种利用hp-scr技术的船舶动力设备废气排放装置 Download PDFInfo
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Abstract
本发明涉及一种利用HP‑SCR技术的船舶动力设备废气排放装置,属于船舶动力设备领域。该装置船舶动力驱动设备的废气排出端通过废气管路与HP‑SCR反应器的进气端相连通;HP‑SCR反应器的出气端通过废气管路与船舶动力驱动设备的增压器的废气进口端相连;HP‑SCR反应器与废气排出端的废气管路段上设有尿素喷射混合单元。本发明提供的利用HP‑SCR技术的船舶动力设备废气排放装置,符合环保要求。符合现代船舶动力及废气排放TIII要求。利用HP‑SCR技术可实现NOX的高效转化,最高转化效率可达95%以上。
Description
技术领域
本发明涉及一种利用HP-SCR技术的船舶动力设备废气排放装置,属于船舶动力设备领域。
背景技术
环保问题目前已得到全球的重视, 然而全球船舶动力柴油机每年排放的氮氧化物(Nox)约占人为Nox总排放的10% , Nox在地表附近形成光化学烟雾,是形成酸雾酸雨的主要因素, 对人体的肺和心肌有很强的毒害作用,所以对船舶主机废气排放的要求也越来越严格,如何达到绿色排放,目前已成为推进船用柴油机优化设计的重要驱动力。
发明内容
本发明针对上述不足提供了利用HP-SCR技术的船舶动力动力设备废气排放装置。
本发明采用如下技术方案:
本发明所述利用HP-SCR的船舶动力设备废气排放装置,包括动船舶动力驱动设备,还包括HP-SCR反应器,废气管路;所述的船舶动力驱动设备的废气排出端通过废气管路与HP-SCR反应器的进气端相连通;HP-SCR反应器的出气端通过废气管路与船舶动力驱动设备的增压器的废气进口端相连;HP-SCR反应器与废气排出端的废气管路段上设有尿素喷射混合单元。
本发明所述的利用HP-SCR技术的船舶动力设备废气排放装置,所述的尿素喷射混合单元上端设有喷射管喷射管将尿素以雾状形式喷射到尿素喷射混合单元内,在热气流中分解成氨和二氧化碳,并SCR反应器内催化剂的作用下,与废气中的氮氧化物NOx发生反应,将其还原成氮气和水。
本发明所述的利用HP-SCR技术的船舶动力设备废气排放装置,所述的喷射管内设有喷嘴与静态混合器。
本发明所述的利用HP-SCR技术的船舶动力设备废气排放装置,所述的喷射管与尿素供应装置相连;尿素供应装置包括供应泵,尿素储罐,尿素供应线;所述的供应泵通过尿素供应线将尿素储罐于喷射管相连通。
本发明所述的利用HP-SCR技术的船舶动力设备废气排放装置,所述的尿素储罐与尿素供应线内的温度保持大于等于3℃。
本发明所述的利用HP-SCR技术的船舶动力设备废气排放装置,所述的废气管路上设有膨胀节。
有益效果
本发明提供的利用HP-SCR技术的船舶动力设备废气排放装置,符合环保要求。
本发明提供的利用HP-SCR技术的船舶动力设备废气排放装置,符合现代船舶动力及废气排放TIII要求。
本发明提供的利用HP-SCR技术的船舶动力设备废气排放装置,利用HP-SCR技术可实现NOX的高效转化,最高转化效率可达95%以上。
附图说明
图1是本发明的HP-SCR技术的船舶动力设备废气排放装置的结构示意图;
图2是本发明设备布置示意图。
图中1为船舶动力驱动设备,2为HP-SCR反应器,3为废气管路,4为尿素喷射混合单元,5为膨胀节,6为增压器,7为喷射管,8为空气瓶,9为尿素供给单元,10为尿素定量给料单元,11为尿素舱,12为SCR系统压缩机,13为排气/密封单元,14为空气调节单元,15为SCR反应器(带催化器)。
具体实施方式
为使本发明实施例的目的和技术方案更加清楚,下面将结合本发明实施例的附图,对本发明实施例的技术方案进行清楚、完整地描述。显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。基于所描述的本发明的实施例,本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围:
如图1所示:利用HP-SCR技术的船舶动力设备废气排放装置,包括动船舶动力驱动设备1,还包括HP-SCR反应器2,废气管路3;所述的动船舶动力驱动设备1的废气排出端通过废气管路3与HP-SCR反应器2的进气端相连通;HP-SCR反应器2的出气端通过废气管路3与船舶动力驱动设备1的增压器6的废气进口端相连;HP-SCR反应器2与废气排出端的废气管路3段上设有尿素喷射混合单元4。(HP-SCR为:安装于涡轮增压器上游的静态混合器和SCR反应器)
SCR技术简单说它是通过化学反应过程来减少废气中的氮氧化物,尿素溶液通常作为还原剂,在热气流中分解成氨和二氧化碳,NH3又在催化剂作用下,与废气中的氮氧化物NO,NO2发生反应,将其还原成氮气和水,具体方程式如下:
(NH2)2CO + H2O → 2NH3 + CO2
NO+NO2+2NH3 → 2N2+3H2O
4NO+O2+4NH3 → 4N2+6H2O
2NO2+O2+4NH3 → 3N2+6H2O
SCR反应装置带催化剂:催化剂是SCR系统的关键部件,以达到最佳的NOx还原效率。SCR应用蜂窝式催化剂。本体材料强度具有较高的耐久性,可承受热冲击。催化剂本身是由5目的蜂窝网结构组成,可火星熄灭。船舶动力驱动设备1的废气排气口端上设有增压器6。
尿素喷射混合单元4上端设有喷射管7喷射管7将尿素以雾状形式喷射到尿素喷射混合单元4内,并与尿素喷射混合单元4内的废气进行反应。为了保证足够的尿素供应,在喷射管中设置了喷嘴和静态混合器。控制单元自动控制给料单元,给料单元向喷嘴供给适量的尿素溶液。在SCR调试过程中,尿素消耗量将与理论消耗量进行对比。尿素定量给料装置有自动清洗功能,可在SCR停止运行时自动清洗。
尿素供应装置将尿素溶液从储罐输送到尿素装置。尿素供应装置有两个泵。一用一备。一个尿素供应单元足以向整个SCR系统提供尿素溶液。考虑到40%尿素溶液的凝固点,尿素储罐和尿素供应线的温度必须始终保持在3度以上。
根据不同的操作模式,在混合器和SCR反应器之间的隔离装置,安装在SCR反应器密封阀之后。
本发明所述的HP-SCR技术的船舶动力设备废气排放装置,在主机工厂试车车间,在主机废气排放端加装SCR反应器,对处理后的废气进行取样分析;实际装船并在海试期间进行实船验证,即可投入运营。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应该以权利要求的保护范围为准。
Claims (6)
1.一种利用HP-SCR技术的船舶动力设备废气排放装置,包括动船舶动力驱动设备(1),其特征在于:还包括HP-SCR反应器(2),废气管路(3);所述的船舶动力驱动设备(1)的废气排出端通过废气管路(3)与HP-SCR反应器(2)的进气端相连通;HP-SCR反应器(2)的出气端通过废气管路(3)与船舶动力驱动设备(1)的增压器(6)的废气进口端相连;HP-SCR反应器(2)与废气排出端的废气管路(3)段上设有尿素喷射混合单元(4)。
2.根据权利要求1所述的利用HP-SCR技术的船舶动力设备废气排放装置,其特征在于:所述的尿素喷射混合单元(4)上端设有喷射管(7)喷射管(7)将尿素以雾状形式喷射到尿素喷射混合单元(4)内,并与尿素喷射混合单元(4)内的废气进行反应。
3.根据权利要求2所述的利用HP-SCR技术的船舶动力设备废气排放装置,其特征在于:所述的喷射管(7)内设有喷嘴与静态混合器。
4.根据权利要求2所述的利用HP-SCR技术的船舶动力设备废气排放装置,其特征在于:所述的喷射管(7)与尿素供应装置相连;尿素供应装置包括供应泵,尿素储罐,尿素供应线;所述的供应泵通过尿素供应线将尿素储罐于喷射管(7)相连通。
5.根据权利要求4所述的利用HP-SCR技术的船舶动力设备废气排放装置,其特征在于:所述的尿素储罐与尿素供应线内的温度保持大于等于3℃。
6.根据权利要求1所述的利用HP-SCR技术的船舶动力设备废气排放装置,其特征在于:所述的废气管路(3)上设有膨胀节(5)。
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