Denitration spray gun as a key equipment in the sncr denitrification process, how to correctly choose the denitration spray gun, so that the denitration system has the best denitration efficiency, is the first issue to be considered when using the sncr denitration process.

Select denitration spray gun, need to consider from the following perspectives.

First, the material because the denitration spray gun in the use of corrosive reducing agent sprayed into the boiler furnace in the 850 °C -1050 °C area, it is necessary to use corrosion-resistant, high temperature material. Coupled with the rapid flow of dust in the flue gas during the denitrification of the flue gas, wear of the denitration spray gun is caused, so wear resistance of the spray gun material must also be considered.

Second, the atomization effect The denitrification spray gun atomization effect mainly includes the atomization particle size and the atomization coverage.

The particle size of the atomized particles of the denitration spray gun needs to be moderate, not too large or too small. When the particles are too large, the spray particles cannot fully contact with the flue gas, affecting the efficiency of denitrification. In severe cases, droplets may form due to incomplete vaporization, which may cause the furnace to burst; if the particles are too small, the ability to penetrate is poor. Reduce the efficiency of denitrification.

In addition, the ability to adjust the denitration spray gun also needs to be considered. Denitration spray guns generally have fixed and telescopic installation methods. For some intermittent denitrification projects, telescopic installations can be used. When they are not needed, the guns can be withdrawn from the furnace to extend the service life. The spray gun can be mounted on the spray head to ensure long-term effective use of the spray gun.

Existing domestic denitrification spray gun manufacturers include Shanghai Spree Spray System Co., Ltd., Shanghai Watcher Spray Intelligent System Co., Ltd., and Dongguan Mayor Original Spray Technology Co., Ltd. In terms of product categories, the three are not much different, and all have the R&D conditions to customize the drawings and samples; materials, imported stainless steel or Hastelloy, etc., can effectively guarantee the wear resistance of the spray gun; As for the atomization effect, as a world-class leading company, Sprei has never had to mention its design. The watchman, as the latest company to develop spray products, has also been effective in recent years. The Mayor of Dongguan, the original spray, was used as a domestic product. One of the first manufacturers to develop nozzles, after more than a decade of accumulated precipitation, is still in the domestic spray field leader.

Finally, in terms of price. Sperry as a foreign product, its product prices are generally several times that of similar domestic products, but the quality is also unmatched; the price of the catcher and Changyuan spray is similar or slightly higher, for domestic denitrification engineering companies and design institutes Say, choose the watcher or Changyuan spray, product selection and parameter comparison.