What are the pressure and temperature of the steam condensate from 0.6MPa saturated steam after passing through the steam trap?
Thread Content
For saturated steam at a gauge pressure of 0.6 MPa, what are the pressure and temperature of its condensed vapor after it passes through a check valve? Is there only condensate and no gas after the steam trap?
In saturated condensation, the temperature is definitely 100 degrees Celsius, unless it is subcooled condensation; I’m not sure about the pressure, but it’s certainly not 0.6 MPa. For products of good quality, it is desirable that all the steam in the trap be condensed, but some of the condensate will inevitably flash
Temperature is related to the drainage temperature of the desuperheater, and pressure drop also occurs as steam flows and condenses in the pipes along its path; the pressure further down the line is related to the back pressure.
If not recycled, it is discharged directly. So the condensate will vaporize, reaching 100 degrees; the outlet of the steam trap contains water and water vapor at 100 degrees
The outlet of the steam trap contains water at 100 degrees and water vapor; as for the pressure, it depends on the system pressure downstream of the valve, but it is definitely less than 0.6 Mp.
It depends on the type of pressure relief valve; back pressures of 80%, 50%, and 30% are all possible
In this case, you should first read the introduction to steam traps; all steam traps are the same
You didn’t study the basic knowledge properly at school! ! The temperature of the condensate formed when 0.6MPa saturated steam condenses depends on whether there is still a means for heat exchange after condensation (i.e., whether supercooling occurs) and on the amount of heat loss; generally, the pressure remains essentially constant before the trap ； The pressure behind the trap is determined by the back pressure at the trap’s outlet; if it is discharged directly, the pressure is at atmospheric level, and the temperature is up to 100 degrees Celsius (depending on local air pressure). It is usually a mixture of steam and water, unless the temperature before the trap has dropped well below 100°C.
It is generally a gas-liquid two-phase flow, and the pressure depends on the back pressure of the steam trap. Back pressure on the 6th floor is the correct answer!
The water temperature and pressure downstream of the trap are related to the pressure in the condensate pipeline; generally, this pressure is more than 2 kilograms lower than that of the steam. When the condensate flows out of the trap, flash vaporization occurs. Due to the small pressure difference, the amount of flash vapor generated is not large, and as the steam moves through the pipes it gradually condenses into a liquid phase. The trap itself has a pressure drop; the pressure of the condensate as it exits the trap is roughly equal to the steam pressure minus this pressure difference.
The outlet of the steam trap contains water at 100 degrees and water vapor; as for the pressure, it depends on the system pressure downstream of the valve, but it is definitely less than 0.6 Mp. Agreed, it makes sense