SirPeter
Geotechnical
- Oct 30, 2014
- 2
What is the right English term for a tank/vessel which is set up between pressurized and atmospheric vessels in a chemical processing plant in order to protect the non-pressurized vessels?
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Protection/barrier tank between pressurized and atmospheric vessels 1
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Flash drums. Vessels into which flow a mixture of liquid and vapor. The goal is to separate the vapor and liquid. For design calculations it is normally assumed that the vapor and liquid are in equilibrium with one another and that the vessel is adiabatic (no heat lost or gained).
Surge tanks. These are storage tanks between units, and can serve a variety of purposes. They can dampen fluctuations in flow rate, composition or temperature. They can allow one unit to be shut down for maintenance without shutting down the entire plant.
Accumulators. These are storage tanks following distillation column condensers. For partial condensers, this flow may be a mixture of vapor and liquid. The outlet flow may be regulated by a level controller in order to avoid the tank either flooding (liquid out the top) or going dry (vapor out the bottom).
Surge tanks. These are storage tanks between units, and can serve a variety of purposes. They can dampen fluctuations in flow rate, composition or temperature. They can allow one unit to be shut down for maintenance without shutting down the entire plant.
Accumulators. These are storage tanks following distillation column condensers. For partial condensers, this flow may be a mixture of vapor and liquid. The outlet flow may be regulated by a level controller in order to avoid the tank either flooding (liquid out the top) or going dry (vapor out the bottom).
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LittleInch
Petroleum
You could also have gas boot or de-gassing vessel.
It can only protect the non pressurised vessel if the gas vent capacity is such that it cannot overpressure in the worst case gas volume being emitted.
If incoming is completely liquid, gas free and doesn't vapourise then it could be more like a surge tank or accumulator so long as the gas part is open to atmospheric pressure.
My motto: Learn something new every day
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It can only protect the non pressurised vessel if the gas vent capacity is such that it cannot overpressure in the worst case gas volume being emitted.
If incoming is completely liquid, gas free and doesn't vapourise then it could be more like a surge tank or accumulator so long as the gas part is open to atmospheric pressure.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
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