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Taking a new type of automatic oxygenation equipment in a million kilowatts unit in Datang Group as an example
this paper introduces the application of automatic oxygenation technology and the advantages and necessity of the new type of oxygenation equipment.The feasibility of the oxygenation equipment was verified after the simulation test on MATLAB software. After the new automatic oxygenation equipment was put into service
the automatic control of oxygenation of feedwater and condensate water was realized. The dissolved oxygen content in feedwater was controlled at(20±3) μg/L
and that in condensate water was controlled at(50±5) μg/L. By increasing the number of flow controller and applying the cascade PI-P+feedforward control algorithm
the operation reliability of the oxygenation equipment was improved
and the steam and water quality became more stable.