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Second, the nozzle anti-wear program In order to improve the service life of the SNCR denitration spray gun in the circulating fluidized bed boiler to ensure that the gun and the nozzle do not have serious wear and tear, the following solutions are proposed for discussion. (1) When the spray gun is used on site, its externally designed acid wear-resistant layer and protective sleeve are protected against wear, effectively ensuring the overall anti-wear effect.
(2) Improve the wear resistance of the surface of the prototype gun head. There are two main measures:
a) Improve the local wear resistance of the front end.
b) Optimize the nozzle design.
(3) Auxiliary increase wear sleeve. Wear-resistant casing material selection of high temperature resistant, wear-resistant materials, such as Al2O3, silicon carbide, etc., due to the poor workability of most of this material, based on the cost and flexibility, you can preferentially choose to use more finished parts, such as welding torch Protection sleeve, etc.
Denitrification Spray Gun Maintenance Program I. Overview SNCR denitration spray guns have poor wear resistance when used in circulating fluidized bed boilers. A certain project delivered a total of xx denitration spray guns. Since May 2012 delivery, July operation has been the longest running time so far. From about November to December, the head of the spray gun, especially the nozzle, was worn out. When the gun is operated, the tip of the gun is close to the wall surface, but due to the fast flue gas velocity (about 30m/s) at the entrance of the CFB separator and the high concentration of dust particles, the head nozzle and the front channel are erosively worn.