The company specializes in: car and car with urea crystal urea solution, is a heavy-duty trucks, trucks, buses to the country five essential car exhaust additives. Urea concentration of 32.5% and a solvent, vehicle urea is defined as ultra-pure aqueous urea, the raw material for granular urea and super pure water. Diesel cars, trucks, buses and other heavy-duty emission standards to achieve the four countries, with a suitable SCR exhaust gas treatment system at the top, nitrogen oxide processing system must use a urea solution injection. Optimal choice of abatement is SCR. At present, the existing requirements for sulfur content ≤350ppm 柴油国 GB19147-2009 standard requires that end technology ECR-DOC, do this to promote conditions in China has temporarily. SCR 350ppm sulfur oil is no problem, there is the technical basis to that end. As a result of the country's four-engine SCR technology better fuel economy than the EGR technology, small changes to the engine, fuel and oil requirements are lower, with the advantage of continuity in the technical upgrade, SCR technology is the most suitable for China's emission reduction technology. The car will start with a urea solution freezes at -11 ℃, the actual use will be completely frozen at -20 ℃ on time. Current technology is reduced by the addition of modifying agent solution freezing point, plus a means of heating devices to prevent solidification of the solution. After thawing can be used. Vehicle urea solution with high purity without any other additives formulated together with the urea solution and pure water, the solution of urea content was 32.5% (mass fraction). Most heavy-duty diesel engine manufacturers at home and abroad using the SCR (Selective Catalytic Reduction) technology to meet Euro IV, Euro Ⅴ vehicle emission standards. SCR technology choice of vehicle must be added as a catalyst for reducing the urea solution, the vehicle emissions standards . Diesel engine exhaust treatment liquid (commonly known as: automobile urea, urea car, car environmental urea), consumption of 1.5 liters per 100 kilometers. For diesel engines meet the national IV emission standards for cars, trucks, buses, buses correct understanding and use of a car with urea, diesel emissions control technology road works SCR diesel engines is a major pollutant emissions NOx (nitrogen oxides) and PM (particulate), to reduce the required operating conditions of these two emissions just the opposite, and therefore, there has been EGR (exhaust gas recirculation) and SCR (Selective Catalytic Reduction) two technical solutions to achieve the four countries emissions Claim. SCR technology route taken in the combustion engine in the process, has made the diesel combustion by technical means to achieve effective control PM emissions targets, and NOx in the exhaust process requires in its reduced to nitrogen (N2) and water (H2O), this process is reducing vehicle urea solution. When injected into the urea solution into the exhaust pipe from the exhaust turbocharger out of the exhaust pipe is mounted metering a urea injection device, the temperature reached 300 ℃ -500 ℃, in the catalyst of urea (NH2CONH2) hydrolysis NH3 and CO2, NH3 and NOx react to form nitrogen and water discharge. Vehicle urea solution in the catalytic reduction reaction is very fine control of a process, the quantity of urea injected must match the NOx concentration, the amount of injected urea is too small, then reach the level of treatment should , the amount of injected urea is too large, will cause the excess ammonia gas into the atmosphere, resulting in new pollution. Second, automotive vehicle requirements urea solution urea solution in Europe called Adblue, in North America, called DEF (Diesel Exhaust Fluid, that diesel exhaust treatment fluid), in the country called the car with urea solution or "Tim Blue." Car purity and cleanliness requirements urea solution is higher, relative to the content of industrial urea, biuret, insolubles, iron, sulfides, chlorides, etc., there are stringent requirements. Because SCR catalyst carrier metal ion poisoning and thus prone to lose catalytic effect, so the car must be used with urea solution in the electronics industry an ultra-pure water. Currently car generally consists of 32.5% urea solution of high-purity urea and 67.5% of ultra-pure water, because the concentration of urea solution crystallization lowest point, when less than -11 degrees will crystallize. In order to prevent crystallization and solidification solution at low temperatures, is currently prevented by adding modifiers to reduce the freezing point of the solution, plus a means of heating devices. First, the use of poor quality vehicles with urea solution or not to use the vehicle in order to harm the urea solution to reduce spending, will appear in the case of the use of urea or cut off to buy cheap OBD detect signals without the use of urea, these practices can not only save costs, but also SCR system damage caused by increased costs, while the sensor generates a signal to the car engine rev limit half, increase vehicle exhaust pollution, affecting the health of the entire human race. Second, the use of vehicle 1 Notes urea solution, the urea solution is taken to prevent car damage the human body vehicle urea solution, in general, is not harmful to human body, such as skin contact only with plenty of soap or rinse ; if unfortunate splashed into the eyes: open eyelids, rinse with water; if they are a lot to swallow, you need to seek medical attention. As long as the note above matters, basically you can safely use a car with urea solution. Urea solution at high temperatures may be free of ammonia, ammonia skin contact has corrosion and irritation, chronic exposure to ammonia, and some people may experience skin pigmentation or finger ulcers, such a situation, it is need to go to hospital. 2, with a urea how to store vehicles Urea is a very stable and pure chemicals, therefore, in the store to pay attention to the following points: (1) Note that the storage temperature of the car vehicle impact urea solution of urea probably require storage temperature between -5 ~ 25 °, to avoid light and high temperatures, and different storage temperatures, the shelf life is not the same. You can see from the table, in southern China, usually within six months of the performance of the basic product is guaranteed to be stable, it is recommended to use the factory within six months of the product, and do not exceed a maximum of one year. In the summer, be sure to make use of the car cool storage place urea solution treatment, if you find when you open the tank closures have very exciting ammonia odor, should be sealed immediately, shall not be used, once through the relevant equipment testing, detection qualified rear may be used. (2) Note that the vehicle urea solution storage containers and filling equipment urea will be a chemical reaction, such as copper, iron, aluminum and other materials with some occurrence, if it is loaded into the jar of such material, or use of such material filling filling facilities, will result in the car with urea deterioration, thus affecting the performance of the SCR. Therefore, the use of urea vehicle when not attached to the urea solution is poured another jar, but also with a special filling device filling. Also note that the car will crystallize at low temperatures with urea, the volume will expand about 7 percent change, so do not add too full urea solution, to maintain storage volume about 90% down. (3) Note that the vehicle urea solution storage and use of the environment to be clean store environment automotive urea solution should be done to clean dust-free, if the car is stored with the urea solution in the dust filled the place, it certainly will pollute the car with urea so that its concentration decreased, but also produce insolubles. So the tanks, filling equipment, etc. must be sealed well and breathing port filtering device must be installed. After opening the urea solution in order to avoid contamination by impurities or by exposure after breeding algae, decomposition of ammonia urea deterioration caused by the car after opening the package except urea solution is stored according to requirements, but also in the 60 days run out. Dongguan Wing Tai Ming Environmental Protection Technology Co., Ltd. is located in the town hall Cha Kau industrial zone, Dongguan City, Guangdong Province, is a professional production of urea and related vehicles filling equipment and other air purification products of high-tech environmental company.