What is the function of knock out drum?
A knockout drum is used to remove any oil or water from the relieved gases. Vapour travels upward at a designed velocity which minimizes the entrainment of any liquid droplets as it exits the top of the vessel. Flares are important safety devices used in oil and gas processing.
What is flare knock out drum?
A flare knockout drum is a vessel in the flare header that is designed to remove and accumulate the liquids that are condensed from the relief gases. It is also known as a vapour-liquid separator or knock-out pot and is available in vertical and horizontal configurations.
What is the difference between separator and knock out drum?
Drum: or knock out drum (KOD) is used when a small amounts of liquid droplets to be removed gas/vapor upstream. Separator: separator is used when there is a quite a bit of liquid to be removed from gas/vapor upstream prior to delivering to the compressor suction.
What is KOD in oil and gas?
Knock-out drums or pots (KOD) are widely used in the Oil & Gas industry for separating components of a vapour-liquid mixture and are highly susceptible to corrosion due to the aggressive chemicals and high operational temperatures.
What is a knock out vessel?
A Knock-out (KO) drum consists of a vertical vessel specially designed to separate vapor and liquid from a two-phase process flow. Inside you’ll find an inlet diffuser and de-entrainment mesh pad designed to maximize the collection of liquid contained in the vapor as it travels to the top of the vessel.
How do you size a knockout drum?
Use a vertical pressure vessel with a length-to-diameter ratio of about 3 to 4, and size the vessel to provide about 5 minutes of liquid inventory between the normal liquid level and the bottom of the vessel (with the normal liquid level being at about the vessel’s half-full level).
What is a surge drum?
Surge drums are frequently located between process units to help reduce the effect of flow rate variations between interconnected process units. A low surge drum level can result in reduced capacity while a high level can cause liquid carryover.
How does a flash drum work?
A liquid stream containing several components is partially vaporised in a ”flash drum” at a certain pressure and temperature. Because of the large drop in pressure, part of the fluid vaporizes. The vapor is taken off overhead, while the liquid drains to the bottom of the drum, where it is withdrawn.
What does knockout mean?
1 : to produce roughly or hastily. 2a(1) : to defeat (a boxing opponent) by a knockout. (2) : to make unconscious the drug knocked him out. b : to make inoperative or useless electricity was knocked out by the storm. c : to get rid of : eliminate knocked out illegal gambling.
Why surge tank is used?
Surge tanks are applied in hydropower plants with long water conduits to reduce pressure forces during the acceleration of the large water masses. The surge tanks reduce the length of the water column to be accelerated, and thus the resulting pressure forces.
What is the different types of surge tanks?
A simple surge tank is like vertical pipe which is connected in between penstock and turbine generator. These are constructed with greater height and supports are also provided to hold the tank. Whenever the water flow suddenly increased the water is collected in the surge tank and neutralize the pressure.
Why is flash distilled?
Flash distillation is used in practice for components with large relative volatility, or if the separation based on the vapor–liquid equilibrium (distillation) can be combined with a physical separation based on a liquid–liquid equilibrium.
How are Ko drums used in industrial applications?
KO Drums. A vapour-liquid separator is a vertical vessel used in several industrial applications to separate a vapour-liquid mixture. Gravity causes the liquid to settle to the bottom of the vessel, where it is withdrawn. The vapour travels upward at a designed velocity which minimizes the entrainment of any liquid droplets in…
What is the purpose of a knock out drum?
KNOCK OUT DRUMS. The Knock out drum is a vessel in the flare header designed to remove & accumulate condensed & entrained liquids from the relief gases.
What is the purpose of a cold flare Ko drum?
– Cold Flare KO drum: To vaporize the liquid accumulated at the drum from various relief sources or liquid drains sources. Some places are not having a pump (cryogenic pump) and instead a piping boot is usually provided with temperature indication allowing transferring the warm accumulated liquid to another destination by motive gas as Nitrogen.
What do you call a vapour liquid separator in a KO drum?
KO Drums. A vapour-liquid separator may also be referred to as a flare KO drum, flash drum, knock-out drum, knock-out pot, compressor suction drum or compressor inlet drum. When used to remove suspended water droplets from streams of air, a vapour-liquid separator is often called a demister.
