CN111852619A - 一种船舶尾气颗粒物捕集装置节能再生系统及方法 - Google Patents
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Abstract
本发明涉及船舶尾气颗粒物捕集装置节能再生系统,包括DPF、前后隔离阀、循环系统、再生进气阀、再生出气阀和差压变送器;DPF由若干个DPF单元组成,其上下游分别设置前隔离阀和后隔离阀;前隔离阀与DPF单元之间的管路上设置再生出气阀,后隔离阀与DPF单元之间的管路上设置再生进气阀;再生出气阀与再生进气阀之间设置循环系统,循环系统包括循环风机、电加热器、温度开关和补氧阀。本发明的有益效果是:本发明设置了循环系统,采用高温气体循环的方式,并结合颗粒物燃烧产生热量,因此只需要最初提供加热到500℃‑600℃的热量,后续循环过程中基本不需要投入电加热器,可以大大降低电加热器的功率以及再生能耗。
Description
技术领域
本发明涉及船舶尾气处理技术领域,具体涉及一种船舶尾气颗粒物捕集装置节能再生系统及方法。
背景技术
船舶尾气排放是港口城市和内陆河地区空气污染的主要来源之一,随着航运业的发展,船舶尾气排放严重影响空气质量,对环境和人体健康带来极大负面影响,因此控制船舶尾气污染物排放迫在眉睫。
DPF是目前较为常用的船舶尾气颗粒物过滤装置,该装置只能收集微粒而不能清除颗粒,需定期进行再生。通过外环境提高烟气温度使所收集颗粒燃烧的主动再生系统是目前较为主流的DPF再生方法。普遍地,DPF采用喷油燃烧再生,这种方式系统复杂,需要不断的消耗燃油,而且对喷油的雾化效果和布置条件要求极高,对于大流量的尾气处理系统,很难均匀喷射。
发明内容
本发明的目的是克服现有技术中的不足,提供一种船舶尾气颗粒物捕集装置节能再生系统及方法,该系统可以增加少量能耗的基础上实现DPF装置的在线再生,延长船舶尾气处理系统的使用寿命。
这种船舶尾气颗粒物捕集装置节能再生系统,包括DPF、前后隔离阀、循环系统、再生进气阀、再生出气阀和差压变送器;DPF由若干个DPF单元组成,其上下游分别设置前隔离阀和后隔离阀;前隔离阀与DPF单元之间的管路上设置再生出气阀,后隔离阀与DPF单元之间的管路上设置再生进气阀;再生出气阀与再生进气阀之间设置循环系统,循环系统包括循环风机、电加热器、温度开关和补氧阀,每个再生出气阀出口均连接至循环风机入口,循环风机与再生出气阀之间的管路上设置补氧阀,循环风机出口连接至电加热器入口,电加热器出口连接至再生进气阀入口,电加热器出口处设置温度开关;每个DPF单元均设有差压变送器。
作为优选:前隔离阀为全密闭隔离阀,后隔离阀上开有直径为15mm-40mm的小孔。
作为优选:循环系统与DPF并联设置。
这种船舶尾气颗粒物捕集装置节能再生系统的工作方法,包括以下步骤:
S1、当DPF捕集了大量颗粒物后,差压不断上升,则开启再生系统,关闭DPF的前后隔离阀;
S2、将DPF单元中的气体在循环风机的作用下,从再生气出口抽出,并通过补氧阀补充一定量的空气,以确保颗粒物氧化所需的氧气;
S3、然后在电加热器的作用下将气体温度提高至500℃-600℃,再经过再生进气阀送回DPF单元,使得DPF单元中的颗粒物在高温下氧化燃烧,达到DPF再生的目的。
作为优选:所述步骤S3中,循环气体的温度由电加热器出口处的温度开关控制。
本发明的有益效果是:本发明设置了循环系统,采用高温气体循环的方式,并结合颗粒物燃烧产生热量,因此只需要最初提供加热到500℃-600℃的热量,后续循环过程中基本不需要投入电加热器,可以大大降低电加热器的功率以及再生能耗。
附图说明
图1为船舶尾气颗粒物捕集装置节能再生系统的工艺流程示意图。
附图标记说明:1-DPF单元;2-前隔离阀;3-后隔离阀;4-电加热器;5-循环风机;6-补氧阀;7-再生进气阀;8-再生出气阀;9-差压变送器;10-温度开关。
具体实施方式
下面结合实施例对本发明做进一步描述。下述实施例的说明只是用于帮助理解本发明。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
作为一种实施例,本申请提供一种船舶尾气颗粒物捕集装置节能再生系统,包括颗粒物捕集装置(DPF)、前后隔离阀、电加热器4、循环风机5、补氧阀6、再生进气阀7、再生出气阀8、差压变送器9、温度开关10。
DPF由若干个DPF单元1组成,其上下游分别设置前隔离阀2和后隔离阀3,通过设置隔离阀,使DPF单元与尾气隔绝开来,避免发动机尾气影响DPF的再生。前隔离阀2为全密闭隔离阀,后隔离阀3上开有直径为15mm-40mm的小孔,用于排出由于补氧阀补入的空气而增加的相同体积的循环气体。
在前隔离阀2与DPF单元1之间的管路上设置再生出气阀8,在后隔离阀3与DPF单元1之间的管路上设置再生进气阀7,便于DPF单元1内的气体与循环系统相互连通。循环系统包括循环风机5、电加热器4、温度开关10和补氧阀6。循环系统与DPF并联设置。
每个DPF单元1设置差压变送器9,监视DPF单元1的差压变化情况,当差压上升一定程度时,开启再生系统。
若干个再生出气阀8出口汇合并连接至循环风机5入口,在循环风机5与再生出气阀8之间的管路上设置补氧阀6。通过循环风机5将DPF单元1内的气体抽出原来的腔体(从再生气出口抽出),并通过补氧阀6补充一定量的空气,以确保颗粒物氧化所需的氧气。循环风机5出口连接至电加热器4入口,用于将循环气体加热至500℃-600℃。电加热器4出口连接至再生进气阀7入口,经过再生进气阀7送回DPF单元1,使得DPF单元1中的颗粒物在高温下氧化燃烧,达到再生的目的。同时,在电加热器4出口设置温度开关10,以控制循环气体的温度。
本再生系统由于采用高温气体循环的方式,只需要最初提供加热到500℃-600℃的热量,后续循环过程中基本不需要投入电加热器,可以大大降低电加热器的功率以及再生能耗。
Claims (5)
1.一种船舶尾气颗粒物捕集装置节能再生系统,其特征在于:包括DPF、前后隔离阀、循环系统、再生进气阀(7)、再生出气阀(8)和差压变送器(9);DPF由若干个DPF单元(1)组成,其上下游分别设置前隔离阀(2)和后隔离阀(3);前隔离阀(2)与DPF单元(1)之间的管路上设置再生出气阀(8),后隔离阀(3)与DPF单元(1)之间的管路上设置再生进气阀(7);再生出气阀(8)与再生进气阀(7)之间设置循环系统,循环系统包括循环风机(5)、电加热器(4)、温度开关(10)和补氧阀(6),每个再生出气阀(8)出口均连接至循环风机(5)入口,循环风机(5)与再生出气阀(8)之间的管路上设置补氧阀(6),循环风机(5)出口连接至电加热器(4)入口,电加热器(4)出口连接至再生进气阀(7)入口,电加热器(4)出口处设置温度开关(10);每个DPF单元(1)均设有差压变送器(9)。
2.根据权利要求1所述的船舶尾气颗粒物捕集装置节能再生系统,其特征在于:前隔离阀(2)为全密闭隔离阀,后隔离阀(3)上开有直径为15mm-40mm的小孔。
3.根据权利要求1所述的船舶尾气颗粒物捕集装置节能再生系统,其特征在于:循环系统与DPF并联设置。
4.一种如权利要求1所述的船舶尾气颗粒物捕集装置节能再生系统的工作方法,其特征在于,包括以下步骤:
S1、当DPF捕集了大量颗粒物后,差压不断上升,则开启再生系统,关闭DPF的前后隔离阀;
S2、将DPF单元(1)中的气体在循环风机(5)的作用下,从再生气出口抽出,并通过补氧阀(6)补充一定量的空气;
S3、在电加热器(4)的作用下将气体温度提高至500℃-600℃,再经过再生进气阀(7)送回DPF单元(1),使得DPF单元(1)中的颗粒物在高温下氧化燃烧。
5.根据权利要求4所述的船舶尾气颗粒物捕集装置节能再生系统的工作方法,其特征在于:所述步骤S3中,循环气体的温度由电加热器(4)出口处的温度开关(10)控制。
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CN212250192U (zh) * | 2020-07-17 | 2020-12-29 | 浙江天地环保科技股份有限公司 | 船舶尾气颗粒物捕集装置节能再生系统 |
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CN112594035A (zh) * | 2020-11-18 | 2021-04-02 | 潍柴动力股份有限公司 | 一种dpf再生装置及再生方法 |
CN112594035B (zh) * | 2020-11-18 | 2022-04-26 | 潍柴动力股份有限公司 | 一种dpf再生装置及再生方法 |
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