Reasons for sulfate turbidity
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After the sulfuric acid plant has been shut down for a while, it turns milky white when it is restarted. I don’t know the reason for this; what should be done? What is that white thing?
This phenomenon is normal; it occurs when the vehicle has been parked for a long time, and the inlet and outlet pipes of the absorption unit are not sealed, resulting in the formation of acidic sludge. The color of the sulfuric acid will return to normal after the vehicle has been in use for a week.
Haha, acidic sludge – it usually appears after stopping the pump and then starting it again; it goes away after a few shifts of operation
There is also catalyst powder brought in by the system, but mainly it’s the acidic sludge from the system and pipes.
This phenomenon is generally caused by the following reasons: 1. Acid sludge in the system; 2. Dust in the system; 3. Catalyst degradation; 4. System corrosion. However, based on what you’ve described, it is likely caused by acid sludge and dust in the system, as catalyst degradation results in a yellowish color, while system corrosion usually gives a green color. But the problem will be resolved after the system operates for a few shifts
But why does the acid used in sulfuric acid production here remain milky white for such a long time, without ever becoming clear?
The role of iron ions – what’s the effect of their purifying power?
The change from acidic to milky white after stopping the machine is likely due to acid sludge in the storage tank; this issue will go away after it operates for some time. If it remains white even after operating for a while, especially if the circulating acid also turns white, then you need to thoroughly inspect the system – there’s a high possibility that there’s a problem with the sulfur injection, resulting in incomplete combustion and the formation of sublimed sulfur. It’s necessary to adjust the ratio of wind to sulfur quickly.
Make sure to check whether there is any steam leaking into the flue gas in the system. If sulfur is used to produce acid, be careful of leaks in the jackets of the sulfur injection devices; in 2007 we suffered serious consequences due to such leaks – the acid produced over a period of over half a month was milky white, and the cause could not be identified. It wasn’t until the flue gas pipes started to corrode and leak that we stopped production for repairs, resulting in huge losses!
It may be that the vehicle has been parked for too long, resulting in the accumulation of acid sludge in pipes, acid tanks and other containers, which causes the sulfuric acid to turn white.
It is also possible that corrosion of the porcelain rings inside the tower has resulted in a milky white appearance, mainly due to fluoride corrosion! Pay close attention to the pressure difference in the dry scrubber tower; otherwise it might collapse, so be extremely careful!