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Submitted Chris Haslego, Nov 21 2011 11:21 AM | Last updated Nov 21 2011 01:29 PM
Category: | Plant Basics |
Question: | How can I stop chlorine from condensing during transport from an outside cylinder? |
Keywords: | chlorine,gas,condensation |
Answer: | BACKGROUNDThe gas is piped normally from an outside cylinder storage facillity to a process control panel at approximately 60 psig. The panel output chlorine pressure is 15 psig and a flow rate of approximately 0.03 scfm. Occasionally the flow control devices in the process panel are contaminated by what appears to be liquid chlorine. It seems that temperature variations in the iron transport pipe may have some influence on the liquid formation. RESPONSEThe condensation temperature of gaseous chlorine at 65 psig is 54 deg F. Thus, if your transport line is fairly long, it is quite likely that ambient temperatures lower than 54 deg F could result in cooling the line enough to cause condensation of the chlorine gas. If you lower the transport pressure to 25 psig, the condensation temperature would be 24 deg F ... which should significantly lower the likelihood of cold ambient temperature causing the gas to condense. Before you lower the transport pressure, you might consider insulating the transport line ... or steam tracing plus insulation ... to keep the line warm. |
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