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Top-Innovation: AdBlue® Temperieranlage für Betankungsversuche

Neue Testanlage für Motorenentwickler zur Senkung des Stickoxid-Ausstoßes

尿素或AdBlue®注入柴油发动机排气系统可降低氮氧化物排放高达90%。这种必须存储在单独储罐中的液体对温度十分敏感,它的冰点是-11.5 ºC,析出过程起始温度为+30 ºC。为测试其在可再现条件下的使用状况以及获得与批量生产有关的资料,Weiss Umwelttechnik现已开发出世界首创的用于燃油加注试验的AdBlue®温度控制设备。

按照ISO 22241-1/AUS 32标准,AdBlue®是一种尿素水溶液,由32.5%的高纯尿素和67.5%的脱盐水构成。当被注入柴油发动机的排气系统时,它会引起一种选择性催化反应,将氮氧化物和氨转化为水和氮。这样能显著减少氮氧化物的排放,特别能引起汽车制造商的关注。

作为汽车制造业的长期合作伙伴,Weiss Umwelttechnik是温度试验测试设备的领先开发商之一。移动式AdBlue®系统在技术上基于国际应用的成熟的燃油温度控制技术。它能够将AdBlue®迅速加热至10 - 45 °C而无需对整个人工气候室或车辆进行冷却或加热。这样可以缩短试验时间并降低试验成本。

该系统具有性能强、质量优、耐腐蚀的优点,其尺寸规格为1,960 x 1,800 x 1,100 mm(高x宽x深)。它允许对试验车辆进行加油和抽油操作,以及对AdBlue®进行循环和调温处理。整个装置完全装箱并安装在个可移动底座上。它由一个无压力通气式190升不锈钢油箱以及一台相连的燃油泵和温度控制单元组成。这种设计使得它可以在加热或冷却过程中通过一个旁通装置对AdBlue®进行循环处理。一旦达到所需温度,燃油泵就启动输出,油箱就能被加注燃油。

作为可选项,可以实现很高精度的加油量预选功能和流量控制功能。取决于油管和喷嘴的配置,流速在每分钟15升和45升之间。该系统的油箱内配有一个油位指示器和一个油位传感器,用于油位监测。加热功能采用流动式电加热器,冷却功能采用带有直接蒸发器的风冷式制冷机组。取决于具体的设计,可以通过人工方式或数字方式设定所需的流速。该系统的控制单元采用由Weiss开发的带有触控面板的Simpac过程控制器。它尤其便于与SHED舱室的自动化系统相连接,使得整套试验设备可以通过一台电脑进行操作。

与AdBlue®相接触的所有部件(包括泵、控制阀、加热单元、喷嘴、管道和所有传感器)均由耐尿素腐蚀的材料制成。全套设备配有各种安全装置,采用一种特殊传感器测量系统外部的氨浓度,并在超过极限值时触发警报或关停系统。该设备作为基础版本而设计,可以按客户要求进行定制和扩展;例如,可延伸温度范围,或者可提升流速至最高60 l/min。该系统的维护区域非常易于接近,确保只需最短的维护保养时间。


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