When the pressure in the deaerator suddenly rises, the water temperature change cannot keep up with the pressure change. The water temperature is temporarily lower than the saturated temperature corresponding to the pressure after the rise, so the oxygen content in the water increases accordingly. At the saturation temperature corresponding to the rear pressure, the dissolved oxygen in the water falls to the qualified range again; when the pressure of the deaerator drops suddenly, for the same reason, the water temperature is temporarily higher than the saturation temperature at this pressure, which helps The precipitation of dissolved gas will reduce the dissolved oxygen. After the water temperature drops to the saturation temperature under this pressure, the dissolved oxygen will slowly rise again.
In summary, heating the water to the saturation temperature under the pressure of the deaerator is the basic condition for the deaerator to work, so the deaerator pressure and temperature should be kept stable during operation.