Function and diameter of the flash tank
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The parameters of the flash tank are: feed: 3 MPag condensed water； Temperature: 235 degrees ； Processing capacity: 8.3 T/h ； The output consists of: 1 MPa steam and condensed water ； Temperature: 184 degrees. I would like to ask everyone: how should the diameter of this flash tank, the amount of steam used, as well as the internal components be determined? And what about installing a steam-water separation device inside the tank? Thank you!
The specifications for the drum in the book \"Comprehensive Handbook of Chemical Plant Equipment Design – Waste Heat Boilers\" can be referred to for design purposes； Of course, the design of steam drums is also covered in other books on industrial furnaces, waste heat boilers, etc.
May I ask, does a flash tank merely provide a space for vapor-liquid separation, while the pressure drop is generally generated by a pressure relief valve?
May I ask, does a flash tank merely provide a space for vapor-liquid separation, while the pressure drop is generally generated by a pressure relief valve?
I would like to ask: Is the condensate entering the flash tank depressurized to cause flashing within the tank itself, or is it depressurized by a pressure relief valve to achieve flashing? If pressure reduction is achieved using a tank, how should it be calculated? Thank you! :)
There is no need to use a pressure reducing valve to lower the pressure; it is sufficient to use the tank itself. The use of a tank for pressure reduction is primarily aimed at controlling the flow rate of the fluid entering the tank so that it remains low (usually below 1 m/s), thereby preventing impact on the pipe walls and ensuring optimal gas-liquid separation.
This post was last edited by guan*nchu on 2015-9-22 20:48. Are you referring to the flow rate inside the tank or the flow rate at the inlet pipe? For entering the tank, we make it enter at a tangent. So, if I want to use saturated water at 3 MPa with a flow rate of 3 tons per hour to produce secondary saturated steam at 1 MPa inside a tank, what should be the diameter of the inlet pipe to the tank, and what should be the inner diameter of the tank? Thank you!
Process calculations cannot be done, but it is possible to calculate the discharge capacity of safety valves