The water seals in the hydrogen delivery system pipelines tend to freeze
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This post was last edited by sunjl1981 on 2013-1-6 at 22:44. In our facility, the hydrogen pipeline that carries hydrogen from chlorohydrine to hydrochloric acid has around seven or eight water seal backflow devices; these devices often freeze over when temperatures drop in winter. If the flow rate is increased, hydrogen gas is released, while if it is reduced too much, freezing occurs and the devices can be damaged. In winter, leaving it closed without draining water often leads to severe water accumulation in the system, resulting in extremely unstable production in the hydrochloric acid system. Dear sea friends, what methods does your company use to avoid such phenomena? Are there any good ways or suggestions? I would appreciate it if you could help provide solutions. ， ， -
The most straightforward approach is to increase the flow rate, but safety must be taken into account; otherwise, a water mist foam catcher can be installed at the outlet of the hydrogen compressor, which will reduce the amount of water used.
Simply apply steam tracing for heating and insulation to the hydrogen pipeline
May I ask everyone, what kind of pipes are used for transporting hydrochloric acid?
There doesn’t seem to be any particularly good solution for this; what’s done is to add dehydration tanks and drain pipes, with regular drainage being necessary. But I’ve never seen one with steam heating; I don’t think it will work.
The last edit to this post was made by After the rain on 2010-10-5 at 23:02; reply to 4#: For the transportation of hydrochloric acid, plastic-lined or PVC pipelines are generally used
Reply 1# ldq: Add steam tracing and water mist capturer
Insulate the hydrogen pipeline running from chlorohydrine to hydrochloric acid with rock wool; use steam for heating to prevent water accumulation. The personnel on duty should check it during inspections, and if freezing is detected, immediately use steam to thaw it
Reply 1# ldq: Using hydrogen pipelines for steam tracing and insulation is a good approach. It is also a method widely adopted by various factories.
Reply to 4# tqg317: PVC, FRP, PP, and CPVC are all acceptable
The steam tracing in our facility has never frozen