In this paper,the saturated steam heat exchanger unit is taken as the research object,and after the heating area of the unit is established,the secondary network flow rate is obtained through qualitative and quantitative calculation,and then the model of the circulating water pump is determined.Then,the difference between superheated steam and saturated steam is explained,so as to draw out the difference between ordinary heat exchanger unit and steam heat exchanger unit in structure,which is interspersed with how to determine the pipe diameter of the secondary network,the calculation of heat consumption,the type of constant pressure and the calculation method of the characteristic curve of the circulating pump.After a comprehensive analysis of the above working conditions,this paper mainly points out that a reliable electrical control system is a necessary condition to ensure the operation of the steam unit,and gives countermeasures to the balance and hydraulic imbalance of the pipe network around the electrical control system and hardware system of the steam heat exchanger unit.At the end of the article,combined with the project commissioning experience,the early warning and treatment methods of the saturated steam unit in the event of an accident shutdown during operation are discussed.
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