1. The concentration of urea solution is one of the key factors. Urea concentration directly affects the catalytic efficiency of NOx and the freezing point of urea solution, and also affects the parameter setting of post-treatment system. The concentration of high-quality vehicle urea solution must be within the specified range.
2. the quality of urea for vehicle SCR system spray accessories affect the insoluble impurities combustion combustion, resulting in carbon deposition, the postprocessing system spray attachment will block the catalyst skeleton, resulting in catalyst efficiency and life expectancy reduction, impurities will cause damage to the air pump.
3. The influence of vehicle urea quality on SCR system catalyst. SCR catalyst is the core of SCR reduction technology, and SCR catalyst is one of the core of SCR catalyst. The activity of catalyst is very important to improve the conversion efficiency of SCR system. The index of aldehydes in vehicle urea is less than 5ppm. Aldehydes may affect the coating of catalyst in SCR system.
4. Sediment is a common problem in the use of urea solution. The sediment seriously affects the operation of SCR system, even causes pipeline blockage, deposition area corrosion, catalyst channel blockage, and finally makes SCR system failure. High quality urea will greatly reduce the production of sediment.
·Carbon deposition caused by excessive impurities in inferior urea
·The pipeline of liquid storage tank is blocked
·There are too many impurities in inferior urea, leading to impurities entering the filter element and damaging the urea pump.
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