Optimization and Renovation of SCR Denitration Ammonia Dilution System for 460?MW Gas Steam Combined Cycle Unit
The second phase expansion of the Guangdong Huizhou LNG power plant's cogeneration project involves a 3×460 MW gas steam combined cycle unit,which is equipped with a flue gas denitrification device.After commissioning and operation,units 4 and 5 experienced denitrification ammonia water backflow into the unit's water and steam system,leading to deterioration of the quality of water and steam in the furnace,posing safety,environmental protection,and social benefits risks to the operation of the unit and external steam supply.The article optimized and renovated the operation mode of the denitrification system and the water source for ammonia dilution,in order to improve the stability and reliability of the denitrification system and water vapor system operation of the second phase unit.
denitrificationdilution with ammonia watermakeup waterclosed cold water
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