Against the background of increasingly stringent environmental protection requirements, denitrification catalysts, as key components of SCR (selective catalytic reduction) technology, are highly valued by enterprises. Its service life not only determines the operating cost of the equipment, but is also directly related to the stability of the denitrification system and the compliance of emissions. So, what practical tips can effectively extend the life of denitrification catalysts and save environmental protection costs for enterprises?

 

Choose the right type of catalyst
It is crucial to understand the specific working conditions of the enterprise. Factors such as flue gas composition, temperature, pressure and humidity will directly affect the performance and life of the catalyst.

High sulfur flue gas: It is suitable to select sulfur-resistant catalysts, which can effectively avoid poisoning caused by sulfide generating sulfates.

Low temperature conditions: The use of low temperature catalysts can maintain high efficiency in the range of 150-250℃, which is particularly suitable for industrial kilns or low temperature flue gas emission scenarios.

High dust environment: Select wear-resistant catalysts to reduce the mechanical wear of particulate matter in the flue gas on the catalyst surface.

Reasonable selection is the first step to extend the service life of the catalyst, and it can also avoid frequent replacement and economic losses caused by material mismatch.

 

Optimize flue gas treatment and reduce the burden on catalysts
Flue gas quality directly affects the working state of the catalyst. By effectively controlling the flue gas composition and parameters, the use efficiency of the catalyst can be significantly improved.

 

Reduce dust content
Installing high-efficiency dust removal equipment (such as bag dust collector or electrostatic precipitator) before the denitrification system can reduce the risk of dust particles in the flue gas wearing and clogging the catalyst.

Control flue gas temperature
Too high temperature will cause sintering of the active components of the catalyst, while too low temperature may cause condensation on the surface of the catalyst and fail.
Precisely adjust the flue gas temperature through the boiler outlet temperature control device to keep it in the optimal working range of the catalyst (such as 300-400℃).

Reduce the impact of corrosive gases
Arsenic, calcium and other heavy metal components in the flue gas will cover the active sites of the catalyst and affect its reduction ability. Adsorption devices or process optimization can effectively remove these harmful components.
Regular maintenance and cleaning: maintain catalyst activity

Online ash cleaning
Regularly use air or steam to clean the catalyst surface to prevent ash accumulation and clogging of the pores.
The ash cleaning pressure needs to be appropriate to avoid damage to the catalyst surface due to excessive pressure.

Offline cleaning
After long-term operation, salt or oil deposits may appear on the surface of the catalyst. Chemical cleaning methods can remove pollutants and restore some activity.

Regular inspection and maintenance
Enterprises should establish a catalyst inspection system, regularly check the physical state of the catalyst (such as deformation, surface damage, etc.), and replace failed parts in time to avoid affecting the overall efficiency.

Use catalyst regeneration technology
For catalysts whose service life is about to expire, the cost of complete replacement is high. However, through professional regeneration treatment technology, the catalyst can be "rejuvenated":

Physical cleaning: ultrasonic or high-pressure water cleaning of surface dust.
Chemical activation: Use special solutions to remove poisonous substances and restore active components.
Thermal regeneration: restore the catalyst structure and performance through high-temperature treatment.
The regenerated catalyst is close to the performance of the new catalyst, which can reduce the cost by 50%-70%. It is a solution that takes into account both environmental protection and economic benefits.

Application of intelligent monitoring system
With the help of modern monitoring technology, enterprises can grasp the operating status of the denitrification system in real time, detect abnormalities in time and take measures.

Differential pressure monitoring: real-time monitoring of flue gas resistance changes to determine whether the catalyst is blocked or worn.
Temperature alarm: Precisely control the flue gas temperature to avoid damage to the catalyst caused by over-temperature or low-temperature operation.
Through intelligent means, enterprises can effectively extend the service life of catalysts and reduce operating risks.

 

Conclusion:

Scientific management helps long-term operation
It is not difficult to increase the service life of denitrification catalysts. As long as scientific management is achieved in material selection, operation, maintenance and technical application, the replacement frequency and environmental protection costs can be greatly reduced. This is not only a guarantee of the economic benefits of the enterprise, but also an active practice of environmental protection responsibility.