Research on Pipe-Blowing Technology for π Type Boiler of 1000 MW Double Reheat Unit
The blowing process of newly built thermal power units is crucial.Compared with conventional thermal unit,the steam parameter of double reheat unit is higher,the thermal system is more complex,the requirements for pipe-blowing debugging are higher.Taking the first domestically made 1000 MW double reheat π type boiler as the research object,and taking into account the actual situation of the project comprehensively,two-stage pressure-reduction pipe blowing debugging process is proposed.First stage the superheater is purged;Second stage,connect the superheater,primary reheater,and secondary reheater in series for blowing pipes.The blowing process can better meet the quality requirements proposed in the blowing guidelines,ensuring the smooth start-up and op-eration of the unit,and providing experience for the subsequent blowing debugging of similar units.
Double reheatπ type boilerSuperheaterPressure-reduction pipe blowing
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