Urgent help: Can a steam trap be used as the cooling vapor drain valve for high-temperature gate valves?
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The high-temperature gate valve at the flue gas inlet that we use for catalysis (with flue gas temperatures of 600–670°) is protected by cooling steam, but it is necessary to manually open the valve from time to time in order to remove condensate and water. I would like to ask whether automatic drainage can be achieved using a steam trap or similar device; will this have any impact on the related equipment? What is the feasibility of installing a steam trap in this context?
No, the drainage capacity of the steam trap is too low to achieve effective condensate removal.
Can I choose a larger one? And it should be in a row; this shouldn’t be a problem. Are there any other reasons?
]]、、 Is there any refinery that uses it in this way?
I think a steam trap can be used; the key is to clearly define the operating conditions before selecting one.
Are a steam trap and a drain valve the same thing? Thermostatic valves are commonly used, but I’ve never seen drain valves.
Steam is used to cool the high-temperature gate valve; during the heat exchange process, the steam gets heated and no condensate water is formed. So why is a steam trap needed?
I agree with the person above: once the steam enters the gate valve, its temperature becomes higher, so there will definitely be no condensation water. Moreover, the purpose of the steam is not to cool the gate valve, but rather to clean the passages in the valve seats and prevent catalyst blockages. The steam flow rate will be very low. What the original poster mentioned about draining condensation refers to the process before the steam enters the valve body; in that case, a thermodynamic steam trap would be sufficient.
No condensate separation is required; the temperature is higher than that of the steam, so no water will form, and any water that does appear will vaporize