May I ask, is it necessary to have a steam trap at the outlet of a heat exchanger?
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Is it necessary to have a steam trap at the outlet of a heat exchanger? If there is a liquid seal, would that work as well? Could someone give some guidance? Thank you. I didn’t explain it clearly the first time; it is indeed steam heating. Because the required pressure drop must be very small; if a hydroseparator is added, the pressure drop becomes too large. In other processes as well, I’ve seen that no hydrophobizers are used. The purpose of hydrophobizers is to prevent gas phase from entering the subsequent equipment, thereby allowing the steam to exchange heat effectively. So I think that if there were a U-shaped liquid seal, it could achieve the same goal; it’s just rare to see designs without a hydrophobic device. This post was last edited by llx123 on 2008-1-21 20:35.]
Only the steam outlet of heat exchangers heated by steam requires a steam trap, in order to make full use of the latent heat of steam. For your reference.
wolaixue* I’ll come to learn*.
Agree with the view from the third floor: in order to make full use of thermal energy, achieve preheating without wasting steam
It doesn’t necessarily depend on the circumstances; in most cases it is required, as a decrease in temperature leads to a decrease in enthalpy, which facilitates the absorption of water
Heat exchangers have many uses, and the use of traps is specific to steam heat exchangers. It is believed that the concept mentioned by the original poster refers to steam heat exchangers. The person who replied on the second floor did not fully understand what the original poster meant; what the original poster was asking was whether it is possible to achieve the same results in steam heat exchangers without using traps, by instead using a liquid seal. In fact, what the original poster described is feasible, but only in certain situations. For instance, when using steam to heat liquids that absorb heat easily (such as organic solvents), the steam side may be at atmospheric pressure or under negative pressure, and in such cases ordinary traps cannot be used. In these situations, a U-shaped bend can be considered based on the system’s pressure conditions to achieve the desired effect.
In my opinion, a trap is designed to recover water; it is meant for draining water rather than steam, in order to prevent steam from escaping and avoid water hammer as well as two-phase flow. It has nothing to do with heat exchange. The trap helps maintain a certain liquid level while allowing water to be drained, thus ensuring that the entire steam-water system operates stably and safely.
Not necessarily; there are many systems in which the heating amount is controlled by the flow rate of the condensate at the reboiler outlet, in which case steam traps are not needed in such processes.
It seems to use steam; the hydroseparator is added to make better use of the thermal energy of the steam
What is the reason for not adding it? Ours includes it; it depends on the conditions at the steam outlet. If the steam can be recovered (after pressure reduction in other locations), it may not be necessary to add it, but it is generally added when the steam is vented or when condensate is reused.
Only when using the latent heat of steam, and after the steam condenses, is a steam trap necessary to prevent air from entraining water.