The issue of excessive iron content in acid produced by synthetic furnaces
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The synthesis furnaces are now used to produce high-purity acid. The iron content at several outlets of the falling film process gradually increases, reaching values of 0.07, 0.16, and 3.6 mg/l respectively – these levels exceed the allowed limits. Could some experts please explain this? Four synthesis furnaces have been replaced, and the falling film absorption process is being used
Additionally, the acid levels exceeded the standards after replacing 4 synthesis furnaces
Is it because when water is absorbed, rust forms, and a little of the second membrane dissolves as well, along with a little of the first membrane?
Replace the pipes with plastic-lined or titanium pipes.
The cause was identified as related to the synthesis furnaces. The fire arresters of the first 4 synthesis furnaces had been replaced, while one furnace used an iron lamp head; those synthesis furnaces with old fire arresters functioned normally despite the presence of iron
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