Coal-fired steam boiler SNCR desulfurization and denitrification equipment

     Product Introduction of SNCR Desulfurization and Denitrification Equipment for Coal-Fired Steam Boilers:

     The SNCR desulfurization and denitrification equipment for coal-fired steam boilers is an environmental protection device specifically designed to remove sulfur oxides (SOx) and nitrogen oxides (NOx) from flue gas in coal-fired steam boilers. SNCR (Selective Non-Catalytic Reduction) technology is an excellent denitrification method, while desulfurization is typically achieved through other technologies such as wet desulfurization or dry desulfurization. Below is a detailed introduction to the SNCR desulfurization and denitrification equipment for coal-fired steam boilers:

      I. Principle of SNCR Denitrification Technology

      SNCR technology is a denitrification method that does not use a catalyst. It involves injecting amino reducing agents (such as ammonia water, urea solution, etc.) at appropriate locations in the boiler furnace or cyclone separator inlet to reduce NOx to N2. The reaction temperature window is generally around 800°C to 1100°C, and the residence time in the flue is long, ensuring a thorough reaction. When ammonia water is used as the reducing agent, the main reaction equation is: 4NH3 + 4NO + O2 → 4N2 + 6H2O.

      II. Components of SNCR Denitrification Equipment

       The SNCR denitrification system mainly consists of the following parts:

1. Reductant Storage and Preparation System: Used for storing and preparing reducing agents, such as ammonia water or urea solution.
2. Metering and Distribution System: Distributes the reducing agent to various injection points in a specific proportion.
3. Injection System: Sprays the diluted reducing agent into the boiler furnace, where it mixes with the flue gas to carry out the denitrification reaction. The injection system typically includes components such as spray guns, pipelines, and valves.
4. Control System: Used to monitor and regulate the entire denitrification process, ensuring denitrification efficiency and safe operation.

      III. Features of SNCR Desulfurization and Denitrification Equipment for Coal-Fired Steam Boilers

1. High Denitrification Efficiency: SNCR technology can rapidly remove NOx from flue gas within the appropriate temperature range.
2. Strong Adaptability: Capable of meeting denitrification requirements under different loads and combustion conditions.
3. Good Economic Performance: Compared to SCR (Selective Catalytic Reduction) technology, SNCR technology has lower construction and operating costs.
4. Significant Environmental Benefits: By reducing NOx and SOx emissions in flue gas, it helps improve air quality.