SCR denitration technology (SCR denitration technology) is introduced after many years of researching and development, it is a masterpiece for overturn traditional denitration technology, this process is used computational fluid dynamics (CFD)and chemical kinetic modeling（CKM）for engineering design. the advance design of virtual reality technology is combined with the size of particular combustion device, file types and features, load range of decomposing furnace, combustion mode, temperature and velocity distribution of hearth fume and so on for engineering design. It is widely used in cement plant ,power plant and most of the kiln so that NOX emissions can meet the requirements