Vehicle urea and often said agricultural urea has difference. Vehicle urea is to reduce the nitrogen and hydrogen compounds pollution emitted by diesel engine, and play a role in environmental protection. It has strict matching requirements, which is basically composed of high purity urea and deionized water. One of the key quality marks is the control degree of impurities. The particles, metal ions, minerals and other impurities in urea are very much, and the harm is very obvious. Once unqualified urea is added, it will lead to post-processing failure, and even produce irreversible fatal harm to post-processing. And for tens of thousands of yuan after the processing, or to choose the brand urea recommended by the manufacturer.
What are the characteristics?
Weichai special urea solution meets the international standard ISO22241-1, German standard DIN70070 and national standard GB29518, witness quality.
The harm of fake and inferior products: the solution quality of inferior urea is not up to standard, the purity is not enough, too many impurities in urea, easy to crystallize, blocking the urea nozzle, at this time, the urea nozzle can be removed, heated and boiled to dissolution. However, the long-term use of vehicle urea that does not meet the quality inspection standards stipulated by the state will reduce the NOx conversion rate, reduce the efficiency and life of the catalyst, and seriously directly damage the SCR system, resulting in irreversible post-processing failure.
Super clean
In order to achieve the ultra-high urea quality requirements, Weichai special urea solution must go through a variety of filtration and precision filtration systems in the production process, and the packaging materials must be dust-free. Basic working principle of SCR system: the exhaust enters the exhaust pipe from the charger turbine. At the same time, by the urea injection unit installed in the DPF, the urea droplets undergo hydrolysis and pyrolysis reaction under the action of high temperature exhaust gas, generating the required NH3, NH3 reduces NOx to N2 under the action of catalyst. In the SCR reduction system, the concentration of urea solution is one of the key factors, but too high or too low concentration cannot improve the conversion efficiency of NOx, but will cause the slip of ammonia and the formation of secondary pollutant ammonia.
High conversion
With special urea solution with a concentration of 32.5% as reducing agent; As the standard configuration of post-treatment SCR system, urea consumption accounts for about 5% of the fuel consumption. Take the capacity of 23Lde urea tank as an example, the mileage can reach 1500-1800 kilometers.
Urea add water: often someone asks whether urea can add mineral water, plain boiled water and other substances. This is absolutely not possible, there are many impurities in the tap water, far beyond our naked eye observation. Calcium, magnesium, sodium and other elements in tap water and mineral water are easy to form solid substances, thus blocking the urea nozzle, leading to post-processing faults. The liquid added in the urea, can only be the deionized water. The urea tank liquid level shall be kept between 30% and 80% of the total volume of the urea tank. Urea storage: Urea solution should be kept in a closed container in a cool, dry space, away from strong oxidants. When filling, such as directly into the urea tank dumping urea splashing, and produce environmental pollution. Professional filling equipment is recommended.
Note for filling urea: urea solution is corrosive to the skin. if the skin or eyes are added, rinse with water as soon as possible; if the pain continues, please seek medical help. If swallowed carelessly, prohibit vomiting, seek medical treatment quickly
Post time: May-30-2024
