What is the reason for the frequent blockage of medium temperature denitrification catalysts?
Publishdate：2020-11-17 Views：29
Medium temperature denitrification catalysts are commonly used in power plant flue gas denitrification, with the addition of reducing agents (ammonia) to reduce nitrogen oxides in the flue gas to nitrogen and water. It is the core part of the reduction reaction, which is affected by the composition of flue gas, flow field, operation mode, etc., and is heavily blocked and damaged, seriously affecting the denitrification efficiency.
Analysis of blockage reasons
The fundamental cause of damage to the medium temperature denitrification catalyst is catalyst blockage. After blockage, the smoke in the blocked area can only pass through the unobstructed catalyst area, which will lead to an increase in the linear velocity of the smoke. The catalyst wear near the blockage area is 2-3 times the normal wear rate. As a result, it caused significant damage and collapse of the local catalyst.
1. Large particle ash accumulation: The ash content on the catalyst surface in the denitrification reactor.
2. Flow field layout: The type of coal used in power plant boilers, the selection of catalysts and reactor design, and whether to increase the conversion rate of low nitrogen burners.
3. Steam blowing.
4. Acoustic Soot Blower: The arrangement of the acoustic Soot Blower has a close impact on the blockage of the catalyst.
5. Smoke composition.
6. Inappropriate catalyst hydrophobic In method.
Faced with the blockage of the medium temperature denitration catalyst, the dust accumulation cannot be absorbed by the vacuum cleaner, but in helplessness, the dust accumulation pierces through the small hole at the top. The catalyst is brazed with artificial iron. Using the above methods for unblocking will inevitably damage or even damage the catalyst, but it is necessary to solve the blockage problem, which will exacerbate the damage to the catalyst.
Medium temperature denitrification catalysts are commonly used in power plant flue gas denitrification, with the addition of reducing agents (ammonia) to reduce nitrogen oxides in the flue gas to nitrogen and water. It is the core part of the reduction reaction, which is affected by the composition of flue gas, flow field, operation mode, etc., and is heavily blocked and damaged, seriously affecting the denitrification efficiency.
Analysis of blockage reasons
The fundamental cause of damage to the medium temperature denitrification catalyst is catalyst blockage. After blockage, the smoke in the blocked area can only pass through the unobstructed catalyst area, which will lead to an increase in the linear velocity of the smoke. The catalyst wear near the blockage area is 2-3 times the normal wear rate. As a result, it caused significant damage and collapse of the local catalyst.
1. Large particle ash accumulation: The ash content on the catalyst surface in the denitrification reactor.
2. Flow field layout: The type of coal used in power plant boilers, the selection of catalysts and reactor design, and whether to increase the conversion rate of low nitrogen burners.
3. Steam blowing.
4. Acoustic Soot Blower: The arrangement of the acoustic Soot Blower has a close impact on the blockage of the catalyst.
5. Smoke composition.
6. Inappropriate catalyst hydrophobic In method.
Faced with the blockage of the medium temperature denitration catalyst, the dust accumulation cannot be absorbed by the vacuum cleaner, but in helplessness, the dust accumulation pierces through the small hole at the top. The catalyst is brazed with artificial iron. Using the above methods for unblocking will inevitably damage or even damage the catalyst, but it is necessary to solve the blockage problem, which will exacerbate the damage to the catalyst.
