CN113153497A - 一种自适应加热型尿素分解装置 - Google Patents
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Abstract
本发明涉及尿素混合器技术领域,特别涉及一种自适应加热型尿素分解装置,该装置包括加热电阻丝网柱、温度传感器、加热电极、电子控制单元;其中,所述温度传感器和加热电极设置在所述加热电阻丝网柱的内部,并与电子控制单元相连接;所述温度传感器、加热电阻丝网柱、电子控制单元、加热电极之间形成闭环结构。本发明的装置通过温度传感器检测实时检测加热电阻丝网柱的温度变化并反馈给电子控制单元,经电子控制单元判断是否加热后,控制加热功率并通过加热电极对加热电阻丝网柱进行加热或停止加热操作,从而提升尿素喷束的温度,促进尿素溶液水解,增强抗结晶风险,并降低了使用成本,提高了利用效率。
Description
技术领域
本发明涉及尿素混合器技术领域,特别涉及一种自适应加热型尿素分解装置。
背景技术
目前,尿素混合器利用丝网结构进行尿素溶液的破碎来提高氨混均匀性以及抗结晶风险,但随着很多工厂取消EGR阀,走高效SCR路线后,原排的上升直接引起尿素喷射量大大增加,大的尿素喷射量导致丝网结构温度骤降,且长时间保持一个较低温度的状态,同时,工厂考虑油耗减少TVA阀的憋气程度,导致排气温度下降。
综上两点,现有技术结晶风险非常大,而且很难通过结构改善赖解决。
因此,本发明提供了一种自适应加热型尿素分解装置,以解决上述技术问题。
发明内容
本发明的目的在于提供一种自适应加热型尿素分解装置,实现了在SCR低温状态下,通过加热的方式促进尿素溶液的水解,从而增强抗尿素结晶风险的能力。
为达到上述发明的目的,本发明提供一种自适应加热型尿素分解装置,包括加热电阻丝网柱、温度传感器、加热电极、电子控制单元;
其中,所述温度传感器和加热电极设置在所述加热电阻丝网柱的内部,并与电子控制单元相连接;
所述温度传感器、加热电阻丝网柱、电子控制单元、加热电极之间形成闭环结构。
进一步地,所述加热电阻丝网柱设置在尿素喷嘴的正下方。
更进一步地,所述加热电阻丝网柱的中心与尿素喷嘴的中心相对准。
再进一步地,所述加热电阻丝网柱为由若干个网状电阻丝组成的圆柱状结构。
进一步地,所述温度传感器设置在加热电阻丝网柱的中心。
进一步地,所述电子控制单元根据环境温度以及尿素需求喷射量的输入进行加热策略及标定的调整。
更进一步地,所述电子控制通过设置预加热的方式提高响应性。
进一步地,在所述加热电阻丝网柱***设置有陶瓷隔热圈。
本发明的一种自适应加热型尿素分解装置,与现有技术相比具有以下优点:
(1)加热电阻丝网柱的设计,既能有效地将尿素溶液破碎成更加均匀的小颗粒状态,从而促进尿素溶液的水解,提高出氨效率,又实现了电子控制单元通过对热电阻丝网柱的局部加热,进而实现了低温条件下加热尿素溶液小颗粒,促进其分解,在降低结晶的风险的同时,由于SCR起喷温度条件的降低而大大减小后处理SCR标定的压力;
(2)仅对加热电阻丝网柱进行局部加热,对电流和控制的要求都低;
(3)通过闭环控制,根据温度传感器的变化及实际需求,调整加热功率,实现成本的降低,提高了利用效率。
附图说明
图1为实施例的自适应加热型尿素分解装置的主体结构示意图;
图2为实施例的自适应加热型尿素分解装置的主体结构俯视图;
图3为实施例的自适应加热型尿素分解装置的工作状态图;
附图标记:加热电阻丝网柱1、温度传感器2、加热电极3、电子控制单元4、陶瓷隔热圈5、尿素喷嘴6、尿素喷束7。
具体实施方式
以下结合附图和具体实施例,对本发明做进一步说明。
如图1-2所示,一种自适应加热型尿素分解装置,包括加热电阻丝网柱1、温度传感器2、加热电极3、电子控制单元4和陶瓷隔热圈5;所述温度传感器2、加热电阻丝网柱1、电子控制单元4、加热电极3之间形成闭环结构。
其中,所述加热电阻丝网柱1设置在尿素喷嘴6的正下方,且加热电阻丝网柱1的中心与尿素喷嘴6的中心相对准。
进一步地,所述加热电阻丝网柱1为由若干个网状电阻丝组成的圆柱状结构。这样,一方面可以在尿素喷束7打到加热电阻丝网柱1上时,在气流的作用下,将尿素溶液破碎成更加均匀的小颗粒状态,以便尿素溶液更易水解,提高出氨效率;另一方面,实现了电子控制单元4通过对热电阻丝网柱1的局部加热,进而实现了低温条件下加热尿素溶液小颗粒,促进其分解,在降低结晶的风险的同时,由于SCR起喷温度条件的降低而大大减小后处理SCR 标定的压力。
所述温度传感器2设置在加热电阻丝网柱1的内部,并与电子控制单元4信号连接;所述温度传感器2实时检测加热电阻丝网柱1的温度变化,并将温度变化数据信号输出给电子控制单元4,从而便于电子控制单元4及时判断是否需要加热和控制加热功率。
进一步地,所述温度传感器2设置在加热电阻丝网柱1的中心,以便更准确地反馈加热电阻丝网柱1的即时温度。
所述加热电极3设置在加热电阻丝网柱1的内部,并与电子控制单元4信号连接;所述加热电极3通过接收电子控制单元4发出的加热或停止加热的数据信号,对加热电阻丝网柱 1进行加热或停止加热操作。
所述电子控制单元4主要负责对加热电阻丝网柱1加热的控制,根据接收到的温度传感器2的温度变化数据信号,由电子控制单元4的计算机***判断是否需要加热,并将控制信号反馈给加热电极3,控制加热电极3对加热电阻丝网柱1进行加热或停止加热。
所述陶瓷隔热圈5设置在加热电阻丝网柱1的***,起到绝热作用,从而减少加热电阻丝网柱1与外界的热交换,提高加热效率。
本发明装置的工作原理为:如图3所示,当尿素喷束7喷到加热电阻丝网柱1时,若温度传感器2检测到加热电阻丝网柱1的温度较设定值偏低时,反馈给电子控制单元4,电子控制单元4判断需要加热后,控制加热功率并通过加热电极3对加热电阻丝网柱1进行加热,从而提升尿素喷束7的温度,促进溶液水解,增强抗结晶风险;当加热电阻丝网柱1 的温度达到设定值时,温度传感器2将检测到的信息输出给电子控制单元4,电子控制单元 4判断需要停止加热后即停止加热操作。整个过程通过闭环控制,根据温度传感器2的变化,调整加热功率,实现降低使用成本,提高利用效率。
实验发现,氨气在120℃左右在催化剂中效率较高,但尿素溶液水解需180℃以上,本发明可通过加热的方式,促进水解,在发动机较低排温时,就可以进行尿素喷射,即使到国七阶段,也会大大减小后处理标定的压力。
以上已对本发明创造的较佳实施例进行了具体说明,但本发明创造并不限于所述实施例,熟悉本领域的技术人员在不违背本发明创造精神的前提下还可做出种种的等同的变型或替换,这些等同的变型或替换均包含在本申请权利要求所限定的范围。
Claims (5)
1.一种自适应加热型尿素分解装置,其特征在于,包括加热电阻丝网柱、温度传感器、加热电极、电子控制单元;
其中,所述加热电阻丝网柱设置在尿素喷嘴的正下方;所述温度传感器和加热电极设置在所述加热电阻丝网柱的内部,并与电子控制单元相连接;
所述温度传感器、加热电阻丝网柱、电子控制单元、加热电极之间形成闭环结构。
2.根据权利要求1所述的一种自适应加热型尿素分解装置,其特征在于,所述加热电阻丝网柱的中心与尿素喷嘴的中心相对准。
3.根据权利要求2所述的一种自适应加热型尿素分解装置,其特征在于,所述加热电阻丝网柱为由若干个网状电阻丝组成的圆柱状结构。
4.根据权利要求1所述的一种自适应加热型尿素分解装置,其特征在于,所述温度传感器设置在加热电阻丝网柱的中心。
5.根据权利要求1~4任意一项所述的一种自适应加热型尿素分解装置,其特征在于,在所述加热电阻丝网柱的***设置有陶瓷隔热圈。
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