How to choose denitration spray gun? Denitration spray gun installation position
How to choose denitration spray gun? Denitration spray gun installation position Denitrification spray gun How to select the denitration spray gun as the key equipment in the SNCR denitration process, how to correctly select the denitration spray gun, so that the denitration system has the best denitration efficiency, is the first question to be considered when using 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 materials. 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 be formed due to incomplete vaporization, which may cause the furnace to burst; when 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 When they are not needed, the guns can be withdrawn from the furnace to extend the service life.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.
How to choose the denitration spray gun When selecting the SNCR gun position, generally pay attention to the following points:
First of all: whether the temperature is conducive to reducing agent reaction.
Secondly, whether it is beneficial to uniformly spray the reducing agent into the reaction zone. In addition: whether it is easy to operate and whether it is easy to maintain is also a factor to be considered, but it is not the main factor.
For the chain furnace, the temperature field in the furnace is very uneven, and the temperature difference between the upper and lower furnaces is very large. It is difficult to find the right temperature reaction area. Therefore, when selecting the reaction zone, it is generally preferred to place the spray gun at a slightly higher temperature to prevent the reaction temperature from being insufficient at low loads. At the same time, due to the short distance between the front and the back of the throat, the flow rate of the flue gas is also high, which is favorable for the uniform injection of the reducing agent into the flue gas. Therefore, it is reasonable to arrange the spray gun near the throat.
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 materials. 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 be formed due to incomplete vaporization, which may cause the furnace to burst; when 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.
How to choose the denitration spray gun When selecting the SNCR gun position, generally pay attention to the following points:
First of all: whether the temperature is conducive to reducing agent reaction.
Secondly, whether it is beneficial to uniformly spray the reducing agent into the reaction zone. In addition: whether it is easy to operate and whether it is easy to maintain is also a factor to be considered, but it is not the main factor.
For the chain furnace, the temperature field in the furnace is very uneven, and the temperature difference between the upper and lower furnaces is very large. It is difficult to find the right temperature reaction area. Therefore, when selecting the reaction zone, it is generally preferred to place the spray gun at a slightly higher temperature to prevent the reaction temperature from being insufficient at low loads. At the same time, due to the short distance between the front and the back of the throat, the flow rate of the flue gas is also high, which is favorable for the uniform injection of the reducing agent into the flue gas. Therefore, it is reasonable to arrange the spray gun near the throat.
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