Why does the gray water need to be deoxygenated in the GE gasification unit?
Thread Content
What is the function of oxygen removal? Isn’t it possible to remove it? Thanks!
Oxygen plays a depolarizing role in electrochemical corrosion and produces the following reactions: 2H2O + O2 + 4e generates 4OH-. Dissolved oxygen in the water promotes electrochemical corrosion, which will cause severe oxygen corrosion in the equipment in subsequent sections. Therefore, the feed water must be deaerated before entering the system.
Of course it is good to remove oxygen, but what are the qualification indicators and what standards are set according to them? In addition, gray water is easy to scale. What type of deaerator is most effective? Please help.
Generally, it is enough to control the water temperature in the deaerator to above 95 degrees. Of course, the deaerator must be at normal pressure, which is just a few dozen KPA slightly higher than the atmospheric pressure. As for what kind of deaerator to choose, I personally think that vertical or horizontal type does not have much influence. Our factory uses horizontal type.
It is better to deoxygenate the water entering the process system! Under high temperature and high pressure, oxygen corrodes and erodes quickly.
It is difficult to completely remove oxygen. What I mean is that the oxygen content is considered qualified.