Analysis of Reasons for Progressive Decrease of High Pressure Steam Pressure Caused by Fluctuation of Released Gas Pressure and Its Counter-Measures

Author has analyzed the reason causing the whole system to approach trip of the high pressure steam due to pressure fluctuation of the fuel gas system of primary reformer in Talimu Large-sized chemical fertilizer plant,it made the pressure of high pressure steam decreased progressively from 10.7 MPa to 8.92 MPa,result indicates that decreasing the setting pressure makes the venting valve opened;the steam consume of the high pressure steam users is increased;the steam production is decreased for high pressure steam of waste heat boiler,that leads to pressure drop of the high pressure steam pipeline network.Through appropriate measures of elevating the temperature of primary reformer,adjusting the load of high pressure ammonia synthesis system,controlling the steam extraction of high pressure steam turbine and increasing the steam production of package boiler and so on,the pressure of the high pressure steam is gradually stabilized and increased,it makes operating condition restored to the normal state.