In recent years, China's environmental protection and governance efforts are self-evident. In view of the haze and other atmospheric pollution problems, various policies have been carried out in the early years: car number limit peer, diesel vehicle exhaust system modification, etc.
What I want to say here is about the problem of urea liquid for car used in SCR system for tail gas modification.
Maybe in the past, car owners have had the experience of active counterfeiting - by refitting SCR systems, or using tap water instead of urea liquid for car, etc. Time has proved that these methods are unwise and will eventually lead to greater losses.
Nowadays, qualified urea liquid for car has become a hot commodity, because a large number of unqualified products have caused losses to the owners.
1.According to the national standard, the main content of urea liquid for car should be 31.8%-33.2%. Density, refractive index and other parameters have a certain range. The concentration of unqualified urea liquid for car will exceed the range in the use process, which not only makes the protection of the environment empty talk, but also makes the locomotive itself unable to work normally because of the urea concentration problem, and the engine will increase because of the reduction of output power. Oil consumption. In the long run, locomotive parts will be damaged, and it will take at least several thousand pieces to repair or replace a small nozzle, and tens of thousands of other parts.
2.The contents of insoluble substances and metal ions (e.g. calcium, iron, copper, zinc, chromium, nickel and aluminium) are strictly controlled by the national standard urea liquid for car. Among them, insoluble substances must be less than 20 mg/kg and other metal ions must be less than 0.2 mg/kg. Once insoluble substances or metal ion impurities exceed the standard, they will adhere to the system, either discharged into dust and PM, or deposited directly on the pipeline, gradually corrode the system over time until the ternary catalyst completely fails.
Here are some simple and easy ways to identify counterfeit urea liquid for car:
a.Look at the color. Lanbao urea liquid for car produced by CDchem is colorless and transparent. It will not appear yellowing, whitening and turbidity. Urea liquid for car purification, used to use three-stage crystallized urea as raw material, now the process upgrade is usually used resin crystallization method, its purity is more pure. The raw material for regular urea liquid for car should be industrial urea, not agricultural urea. If raw materials are not guaranteed, they may contain metal ions or other impurities in their components, and yellow or other colors and turbidity will occur. It is these metal ions or impurities that will seriously affect the normal operation and service life of SCR system.
b.Look at the barrel wall. The crystallization point of authentic urea liquid for car is between - 5°C and - 11°C, which can not be reached in most areas and seasons in China. At room temperature, there is no case of crystallization in the use of Lanbao urea liquid for car. Adblue crystallizes normally after droplet evaporation and at minus -5°. But barreled products are usually not easy to crystallize without seed entering. So it can be judged that it is unqualified product before the crystallization point is reached.
c.Audit qualifications. When purchasing chemical products, one must examine the other party's production qualification and business license, etc. Regular manufacturers should meet the requirements of country IV, country V or country VI. They will be subject to spot checks and inspections by the General Administration of Quality Supervision, Inspection and Quarantine. This qualified report will filter out substandard urea liquid for car.
d.View enterprise quality standards and factory inspection reports. Every batch of products produced by all the factories of CDcehm will be inspected at the time of leaving the factory, and then shipped after being qualified. So every batch of goods you can let the manufacturer produce the factory inspection report, which is the right of consumers.
