The desuperheater is an important means to ensure the safety of superheater and reheater heating surface

but the input of desuperheater will seriously affect the economy of the unit. Through wall temperature characteristic test of screen superheater

high temperature superheater and high temperature reheater

and on the premise of ensuring the safety of heating surface pipes

several suggestions were proposed

such as rising the the trigger temperature of desuperheating water and decreasing the water quantity of desuperheating water. At the same time

the delay time of desuperheating water spraying was observed

and it was considered that the service time of desuperheating water spraying should take into account the delay time of desuperheating water spraying and pay close attention to the variation trend of reheat steam temperature. It found out that

increasing the temperature of water spraying and optimizing the service time of water spraying can both reduce the amount of desuperheating water

greatly improve the economy of boiler operation

prevent the desuperheater pipeline from being subjected to frequent thermal shock

and ensure the safety of heating surface pipes. This method has good application effect.