水泥自上料搅拌车的车用尿素结晶问题一直是朋友们的困扰，它为什么会结晶呢？下面小编来

The problem of urea crystallization for cement self-feeding mixer truck has always been a problem for friends. Why does it crystallize? Let's make up

原因一：使用了劣质尿素

Cause 1: use of inferior urea

现在市面上的车用尿素质量参差不齐，一些无良商家为了以低价来吸引顾客，用农用尿素或者工业尿素为原料代替专用高纯度车用尿素原料生产车用尿素溶液。而一些朋友为了省钱，购买这种劣质尿素，长期使用，对车辆的后处理系统有很大的损害，后期的维修成本更高，得不偿失。

At present, the quality of vehicle urea on the market is uneven. In order to attract customers at a low price, some unscrupulous businesses use agricultural urea or industrial urea as raw materials to produce vehicle urea solution instead of special high-purity vehicle urea raw materials. In order to save money, some friends bought this kind of inferior urea and used it for a long time, which would cause great damage to the after-treatment system of the vehicle. The later maintenance costs would be higher, and the gains outweigh the losses.

原因二：尿素溶液不纯

Cause 2: the urea solution is not pure

车用尿素液的纯净度是区分尿素液质量优劣的重要指标。车用尿素溶液虽然看着是透明的液体，但里面含有很多的不溶物，比如缩二脲、缩三脲等，如果这些胶体物质含量过高，会产生氰尿酸结晶。

The purity of vehicle urea solution is an important indicator to distinguish the quality of urea solution. Although the vehicle urea solution looks like a transparent liquid, it contains many insoluble substances, such as biuret and biuret. If the content of these colloidal substances is too high, cyanuric acid crystals will be produced.

原因三：用车习惯不良

Cause 3: bad use habits

很多朋友在用车时，对SCR后系统的维护和保养不到位，所以建议大家：

Many friends do not maintain the SCR system properly when using the car, so we recommend that you:

定期更换尿素滤芯，气驱尿素泵、空气辅助式尿素泵以及空气滤芯；尿素罐内部容易积累杂质沉淀物和结晶，所以要定期清洗，同时尿素罐外部也要注意清洁，尤其是罐盖子周围，加注尿素时别让赃物掉进罐里；

Regularly replace the urea filter element, air-driven urea pump, air-assisted urea pump and air filter element; It is easy to accumulate impurities, precipitates and crystals inside the urea tank, so it is necessary to clean it regularly. At the same time, pay attention to cleaning the outside of the urea tank, especially around the tank cover. When adding urea, do not let the dirt fall into the tank;

尿素喷嘴、管路等也会出现结晶堵塞的现象，建议用户根据厂家建议到服务站作保养、检查和维护；熄火后切忌立刻断开整车电源。

Crystallization blockage may also occur in urea nozzles, pipelines, etc. Users are recommended to go to the service station for maintenance, inspection and maintenance according to the manufacturer's recommendations; Do not disconnect the power supply of the whole vehicle immediately after flameout.

后处理系统的吹扫过程，会在发动机熄火后进行。压缩空气吹扫管路，目的是排除管路中的尿素，避免结晶堵塞，整个吹扫过程大概持续30-120秒。所以建议当车辆钥匙开关关闭两分钟后再切断整车电源。

The purging process of the aftertreatment system will be carried out after the engine stops. The purpose of compressed air purging the pipeline is to eliminate the urea in the pipeline and avoid crystal blockage. The whole purging process lasts about 30-120 seconds. Therefore, it is recommended to cut off the power supply of the whole vehicle after the vehicle key switch is turned off for two minutes.

综上所述，想要防止车用尿素结晶，定期对SCR系统进行清洗养护和选用靠谱的车用尿素显得尤为重要！更多相关内容就来我们网站http://www.sdzkjf.cn咨询！

To sum up, in order to prevent the crystallization of vehicle urea, it is particularly important to regularly clean and maintain the SCR system and select reliable vehicle urea! Come to our website for more relevant content http://www.sdzkjf.cn consulting service