Sisic is the best material for desulphurization dust removal nozzle, since its feature as high hardness, acid alkali and friction resistance. It can be used for more than 10 years without maintenance in bad environment, such as, high temperature, high abrasion, and serious corrosion. Spray liquid drip are allocated evenly, and the flow channel is very smooth without any plug. The desulphurization nozzle has replaced the imported products and is applied widely in desulphurization system several tens of big or middle-size power plant.