What are the consequences of insufficient feedwater temperature in the steam drum?
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What are the consequences of insufficient feedwater temperature in the steam drum? For example, the normal feedwater temperature in a medium-pressure drum is around 220 degrees. If the feedwater heater fails, the feedwater will have only the temperature of 104 degrees, which is the temperature after it passes through the deaerator. What effects does this low-temperature feedwater having direct access to the drum for steam generation have on operations and steam quality?
It doesn’t matter; it’s just that the steam production decreases and energy consumption increases. Just pay attention to the temperature of the heat exchange medium, and that’s all – it has no impact on the quality of the steam.
Agree with what was said above; generally speaking, the amount of vapor released is less
There will definitely be an impact. First of all, the temperature will drop, and as the temperature falls, the pressure will also decrease. At the same time, saturated steam carries water with it, so the impact is significant. It’s likely that the gas production volume will be affected, as well as the quality of the steam.
During boiler design, the feedwater temperature is determined through heat balance calculations. If the feedwater heater fails, this disrupts the entire heat balance; as a result, the evaporation rate decreases. To maintain the total steam production, the furnace temperature will rise excessively, and the quality of the steam will decline. Even after superheating, the temperature will not meet the required standards.
When the water temperature is low, the amount of steam generated is reduced, the steam pressure drops, and the steam temperature falls as well. This affects the quality of the steam; in severe cases, the steam contains water
I agree with you; what others say, that \"when the water temperature is low, the amount of steam produced is reduced, the steam pressure drops, the steam temperature falls as well, the quality of the steam is affected, and in severe cases, the steam contains water,\" is not necessarily correct. Because the steam pressure is controlled by the outlet valve. The cycle ratio may have changed.
A sudden drop of 100 degrees will inevitably affect the quality and output of steam; be sure to make adjustments in a timely manner
It has a significant impact on steam production, but little effect on steam pressure and steam quality.
From the perspective of thermal balance, we also need to consider the heating surfaces in the evaporation section; if there are not enough heating surfaces, the steam production volume cannot be increased. As a result, the amount of superheated steam decreases, the temperature of the steam rises, and will its quality decline? Not necessarily