At present, the denitration processes mainly used in the market are Selective Catalytic Reduction (SCR), Selective Non-Catalytic Reduction (SNCR), and SNCR / SCR mixed flue gas denitration technologies. The temperature requirements are relatively high, requiring medium and high temperature reaction temperatures, and the denitrification technology in low temperature areas on the market is limited.
The comparison table between the low-temperature denitration process studied by our company and the general denitration process in the market:
At present, there are three main types of reducing agent raw materials that can be selected in the SCR denitration process: liquid ammonia, urea and ammonia.
In the project, SCR systems using anhydrous liquid ammonia, urea and ammonia as reducing agents have mature operating performance and have their own characteristics.
Liquid ammonia: Liquid ammonia has the largest investment and the lowest transportation and usage costs. However, liquid ammonia is flammable and explosive. There must be strict safety guarantees and fire prevention measures. Its storage involves local regulations and labor hygiene standards.
Ammonia water: The mass percentage of ammonia water used for denitrification is generally 20-30%, which is safer than liquid ammonia, but the transportation volume is large, and the transportation cost is higher than liquid ammonia.
Urea: Urea is a granular agricultural fertilizer that is safe and harmless, but its ammonia production system is complicated, the equipment is large, the initial investment is large, and the storage of large amounts of urea still has deliquescence problems.
