Corrosion protection and iron removal for chlorine pipelines.
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Carbon steel pipes are used for chlorine pipelines. Over time, a red substance appears in the glass rotameter; this is likely due to corrosion of the carbon steel pipes, with rust or ferric chloride being carried down by the flow. How can this be reduced or eliminated? I’ve seen pipe filters that can filter out such red substances – can they do that? Are there any other methods?
It should be possible to suppress it, but it might not be possible to completely eliminate it. Solid rust can be filtered out, but liquid ferric chloride cannot. Carbon steel works fine as long as it isn’t corroded through; even with the lining I use, perforations occur from time to time
I use grade 20 steel before the flow meter, and steel lined with PTFE from the flow meter to the reaction vessel. We’re still friends; my old account was banned. What value do you use for the chlorine flow rate in meters per second? I’m at 6 meters per second now. What temperature do you use for the carburetor water? Is the temperature of the chlorine gas measured after it has been vaporized?
I don’t use chlorine; other departments in the company do, and I’ve heard a little about it. The chlorine we use is purchased in T-cans or Y-cans. For precision-grade production, only about 10 tons are produced per month; it’s sufficient to allow multiple bottles to release gas simultaneously, with natural heat exchange being enough, no vaporizer needed
According to meteorological data, one bottle corresponds to a production rate of 7 kilograms per hour.
If normal temperature water is used, will nitrogen trichloride accumulate? Some say that the water temperature should be above the boiling point of nitrogen trichloride, but this does not guarantee that all of the nitrogen trichloride will vaporize. If nitrogen trichloride vaporizes, it requires that the temperature of the chlorine gas flowing out be higher than the boiling point of nitrogen trichloride.