Urea for vehicles is an essential product for heavy-duty diesel vehicles to meet the national IV emission standards. Urea for vehicles refers to a urea aqueous solution with a urea concentration of 32.5% and a solvent of ultrapure water. The raw materials are urea crystals and ultrapure water. Heavy-duty trucks, passenger cars and other diesel vehicles must meet the National IV emission standards. An appropriate SCR system must be used for tail gas treatment. This system must use urea solution to treat the nitrogen oxides in the exhaust gas. Therefore, the urea solution for vehicles has become a must for heavy trucks and buses to meet the national IV emission standards. The vehicle urea solution (AdBlue) is a solution prepared with high-purity urea and pure water without any other additives. The solution has a urea content of 32.5% (mass fraction). Most heavy-duty diesel engine manufacturers at home and abroad have adopted SCR (Selective Catalytic Reduction) technology to meet the Euro IV and Euro V motor vehicle emission standards. Vehicles that choose SCR technology must add urea solution as a catalytic reductant to allow the vehicle to meet the emission standards. Our Road Machinery includes Concrete Mixer,Road roller,Sprinkler,Road sweeper.It is all the machinery needed in the whole road construction and maintenance. Road Machinery,Small Construction Mixer Cement,Water Sprinkler Truck,Ntelligent Street Ride Sweeper Jiangsu Minnuo Group Co.,Ltd , https://www.js-minnuomachinery.com
SCR is the best choice for reducing emissions in China. At present, the current national diesel GB19147-2009 requirements for sulphur content ≤ 350ppm, while the ECR-DOC technical requirements for oil sulphur content below 10ppm, so in China does not have promotion conditions. SCR can withstand 350ppm sulfur-containing oil products, so there is a promotion of the technical basis. Due to the use of SCR technology, the fuel economy of the four engines is better than that of the EGR technology, the changes to the engine are small, the requirements for fuel and oil are low, there is an advantage in continuity of the technology upgrade, the durability of the SCR catalyst is good, and there is no clogging of the catalyst The risk, therefore SCR technology is the most suitable for China's national conditions of heavy-duty diesel vehicles emission reduction technology line.
Urea for vehicles is a urea aqueous solution with a concentration of 32.5% and ultrapure water as the solvent. The raw materials for production are urea crystals and ultrapure water. The key point is the purity of raw materials. From the point of view of the production process, although the purity of raw materials for vehicle urea is higher than that for general industrial use, the current domestic technology can already meet the actual application requirements. The production process of automotive urea is not sufficient to build high barriers to entry.
Domestic car urea is mainly obtained from the purification of industrial urea. Its main principle is: 1) At temperatures of 70-75°C, urea hydrolyzes in aqueous solution. 2) At temperatures below 30°C, urea crystallizes again from the aqueous solution. 3) The purity of each hydrolysis crystallized once will be greatly improved, generally using industrial grade urea hydrolyzed and crystallized once, the vehicle urea standard requirements can be achieved, and the output ratio is 1.5:1.
Urea for vehicles must use ultra-pure water of the first class in the electronics industry. Vehicle urea catalyzed by the SCR catalyst carrier metal ion poisoning and thus lose catalytic effect, so the vehicle urea solution must use the electronic industry level one ultrapure water (resistivity ≥18MΩ?cm). The urea solution for vehicles will begin to freeze at -11°C, and will be completely frozen at -20°C in actual use. The current technology is to prevent the solution from solidifying by adding a modifier to lower the freezing point of the solution and applying a heating device.
Diesel engine exhaust gas treatment fluid (commonly known as: automotive urea, vehicle urea, automotive environmental urea), known as AdBlue in China and Europe, DEF in the Americas, and ARLA32 in Brazil. AdBlue is composed of 32.5% of the high Pure high-purity transparent liquid composed of pure urea and 67.5% deionized water has a faint smell of ammonia. If splashed, moisture evaporates and crystals form. AdBlue is a consumable product that must be used in SCR technology for cars, trucks, passenger cars and heavy-duty non-road diesel engine vehicles equipped with an SCR (Selective Catalytic Reduction of Vehicle) system. Together with the SCR catalyst The harmful nitrogen oxides emitted by diesel engines are converted into harmless water vapor and nitrogen. The main components of the SCR system include the catalyst, AdBlue injection device, AdBlue container and AdBlue dose controller. Almost all European, U.S., and Asian, including Chinese heavy-duty vehicle manufacturers, also equip vehicles with selective catalytic reduction systems and incorporate AdBlue working fluids to meet new NOx emission standards (eg Euro IV, Euro 5) and AdBlue. The SCR technology works together to optimize engine performance and fuel consumption, reduce diesel consumption by up to 6%, and significantly reduce costs. The average consumption of AdBlue is 5% of the general diesel consumption, which is approximately 1.5 liters per 100 kilometers of highway driving. AdBlue can only use the engine combination used to configure the SCR system because it is neither a fuel nor a fuel additive. AdBlue complies with the standards in ISO22241, DIN70070 and CEFIC regulations to ensure the effective operation of the SCR system. AdBlue does not harm the environment and is classified as the lowest risk transportable liquid.
At present, domestic automotive urea production is dominated by small and medium-sized private enterprises, and channel sales capacity is lacking. Domestic vehicle urea is mainly produced by Jiangsu Kelansu, Liaoning Rundi, Jingmai Chemical, and Beijing Yili. Each company's production capacity is between 100,000 and 300,000 tons per year. Among them, Jiangsu Kelansu and Liaoning Rundi have annual production capacity of 300,000 tons, and there are a series of modifier patents for the problem of low temperature solidification of urea for vehicles. Jiangsu Kelansu has exported urea solutions from Koenigsin to Russia, Eastern Europe and South America. However, for the current small-scale private enterprises, the inability to grasp the core sales channels is the fundamental weakness of their development.
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