First introduced myself about my company specializing in the production: Automotive urea, urea solution used car, car green car with urea, 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. For this purpose, heavy-duty trucks and buses reached the country five essential vehicle emission standards urea solution products. But many people think that the high cost is defective, then I'll give you the * is NO, we have to count the cost, plastic buckets (volume): 5 yuan Tags: 4 gross (positive and negative) water: 3.4 (all regions prices vary) equipment investment: between 25- to 300 000, clean room: between 4-50000. Therefore vehicle urea technical threshold is not high, relative to the survival of small and medium enterprises more difficult, want to run large enterprises sell their high prices in these areas: advertising costs, public relations expenses, stealth gray fees. 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 catalytic converter catalytic converter durability and there is no blockage The risk, therefore SCR technology is the most suitable for my conditions and heavy diesel vehicles emissions technology roadmap. Called "Car urea national standards" GB 29518-2013 "diesel engine NOx reduction agent urea solution (AUS32)" on May 7, 2013 issued by the State Administration of Quality Supervision and the National Standards Commission, July 2013 1st. The standard proposed by the Ministry of Environmental Protection, the National Petroleum Products and Lubricants Standardization Technical Committee of petroleum fuels and lubricants under the jurisdiction of the Technical Committee, including the drafting of Sinopec Sales Co., North China Branch, China Environmental Science Research Institute, Sinopec Lubricant Oil Company, Petroleum Marketing Company, PetroChina Lanzhou lubricant research and development centers, Sichuan Meifeng Chemical and other units. This standard specifies the diesel engine NOx reduction agent - urea solution (AUS32) terms and definitions, labeling, technical requirements and test methods, inspection rules, marking, packaging, transport and storage, and the product filling interface do the recommended requirements. This standard specifies, the urea aqueous solution (AUS32) refers to industrially produced contains only trace amounts of biuret, urea, ammonia and water, free of aldehydes and other substances (such as anti-caking agent), no sulfur and sulfides, chlorides, nitrates and other compounds. Should have on compliance with this standard AUS32 filling pump and container following logo: AUS32 GB 29518. This standard also said that in order to avoid contamination and AUS32 compatible container, pipes, valves, fittings, gaskets and other corrosion, handling, transportation, storage and must ensure that all aspects of sampling AUS32 direct contact with the material. It is reported that before, part of the city is (or advance) implement national IV standard heavy-duty diesel vehicles, the introduction of the different versions of the relevant vehicle urea local standards, such as Beijing, Shanghai and other places; April 2013 Society of Automotive Engineers of China has issued been compiled by the Society organized the "vehicle specification urea solution." GB 29518-2013 GB version now promulgated, will become a unified national standard. Ministry of Environmental Protection issued the original provisions of the national heavy, national IV standard light diesel vehicles sold since July 1, 2013 to implement, but the GB version of "car urea Standards" promulgated time lagged; more important is also the country IV diesel Supply not fully in place in the country, so the national diesel car sales once again postponed the implementation of the national IV inevitable.