Coke oven flue gas desulfurization and denitrification equipment SCR low-temperature denitrification process

      Coke Oven Flue Gas Desulfurization and Denitrification Equipment SCR Low-Temperature Denitrification Process

      The SCR (Selective Catalytic Reduction) low-temperature denitrification process in coke oven flue gas desulfurization and denitrification equipment is a highly efficient flue gas purification technology, particularly suitable for treating low-temperature and complex-component waste gases like coke oven flue gas. The following is a detailed introduction to this process:

      I. Principle of SCR Low-Temperature Denitrification Process

      The SCR low-temperature denitrification process utilizes a catalyst to reduce NOx in the flue gas to nitrogen and water under low-temperature conditions. The reaction principle is as follows:

      Under the action of the catalyst, ammonia (NH₃) acts as a reducing agent and undergoes a selective catalytic reduction reaction with NOx in the flue gas, primarily producing nitrogen (N₂) and water (H₂O), thereby achieving efficient removal of NOx. This reaction must occur within a specific temperature range to ensure the activity and selectivity of the catalyst.

      II. Semi-Dry Desulfurization + Low-Temperature SCR Denitrification Integrated Process

      The semi-dry desulfurization + low-temperature SCR denitrification integrated process is currently a mature technology for coke oven flue gas desulfurization and denitrification treatment. This process first uses a semi-dry desulfurization device to remove sulfur dioxide (SO₂) and other acidic gases from the coke oven flue gas. After dust removal treatment, the flue gas enters the low-temperature SCR denitrification reactor for denitrification. This process offers the following advantages:

1. High desulfurization and denitrification efficiency: Semi-dry desulfurization efficiency can reach over 85%, and SCR denitrification efficiency can reach over 80%.
2. Good economic performance: The amount of desulfurization solvent sprayed can be automatically adjusted based on the SO₂ concentration in the flue gas, reducing the consumption of desulfurizing agents. At the same time, the low-temperature SCR denitrification process can lower the cost of flue gas heating.
3. Strong applicability: This process is suitable for coke oven flue gas treatment needs of different scales and types. It can also automatically adjust and adapt to various fluctuations in flue gas operating conditions.