The service life of tungsten carbide sprayed on the surface of the pulverized coal sampling gun is more than half a year
The pulverized coal sampling gun is used in the analysis equipment of pulverized coal in thermal power stations. The accurate control and analysis of the fineness of pulverized coal in coal-fired boilers in power stations is of great significance to the safe and economical operation of boiler units. At present, the use of positive pressure direct blowing pulverizing systems for large units is increasing. Since the pulverized coal at the outlet of the pulverizer is directly fed into the furnace by the primary air for positive pressure, it is very difficult to sample the daily pulverized coal. Generally, the self-spraying method is mostly used, the sampling accuracy is poor, and it is often difficult to seal well when sampling, there is coal powder leakage, the working environment is poor, and the labor intensity is high. Tiger Power has accumulated decades of experience in gas-solid two-phase flow theoretical test and engineering application research, and the newly developed patented product, the rotary arm fixed pulverized coal sampling device, can easily realize the pulverized coal of the positive pressure direct blowing pulverizing system. The most important feature of isokinetic sampling is the simultaneous isokinetic sampling of multiple points, which makes the powder samples taken have good representativeness, good repeatability of multiple sampling, simple operation, and no coal powder leakage, which greatly improves the working environment and reduces the It is the most ideal device for daily analysis and sampling of pulverized coal fineness in the positive pressure direct blowing pulverizing system of power plant boilers in the world.
Since the pulverized coal sampling gun is eroded and worn by the pulverized coal, it is necessary to solve the problem that the sampling gun is not wear-resistant. Our company uses tungsten carbide alloy powder to spray the wear-resistant coating, and the use effect is obvious. The service life is 1 month without spraying. It can be used for more than half a year, because after spraying, the surface hardness has increased from HRC10 to HRC65, and the surface can withstand higher temperatures.
