What is purpose of flash tank?
The function of a flash tank is to allow high-pressure condensate to flash and a reduced pressure steam. This reduced pressure steam is then used to supply heat to a “low” pressure supply main.
How do you size a flash tank?
As a general rule of thumb, design a tank length which is about twice as long as its diameter. This would work out to 3 diameters or in our example works out to 9.5′ (28.5 ÷ 3). If we round off to 10′ for the tank diameter, the tank length would be 20′ providing a flash area of 30 square feet.
Where is a flash tank vented?
The flash steam exits through the vent at the top of the tank and is either vented to atmosphere or piped to a low pressure line for use in low pressure steam applications. 3. The condensate is discharged through the bottom of the flash tank.
How does a flash drum work?
The fluid is pressurized and heated and is then passed through a throttling valve or nozzle into the flash drum. 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 The vapor is taken off overhead, while the liquid drains to the bottom of the drum, where it is withdrawn.
How does flash separation work?
Flash distillation (sometimes called “equilibrium distillation”) is a single stage separation technique. A liquid mixture feed is pumped through a heater to raise the temperature and enthalpy of the mixture. It then flows through a valve and the pressure is reduced, causing the liquid to partially vaporize.
What happens when water flashes?
Flash evaporation (or partial evaporation) is the partial vapor that occurs when a saturated liquid stream undergoes a reduction in pressure by passing through a throttling valve or other throttling device. Uncontrolled flash evaporation can result in a boiling liquid expanding vapor explosion (BLEVE).
How is flash steam generated?
Flash steam is produced when high pressure condensate is discharged to a lower pressure. When this pressurised condensate is exposed to atmospheric pressure, it has energy more than it can contain at atmospheric pressure. This excess energy is used to convert a portion of this condensate into steam.
Is flash tank a pressure vessel?
In steam plants, high-pressure condensate is changed to lower pressure. Flash tank, on the other hand, is designed to enable high pressure condensate to flash as well as reduce pressure steam. Overall, a flash tank is a collection system while a flash vessel mirrors a separation system.
What is a flash steam?
“Flash steam” is simply steam. The “flash” prefix is used to inform the reader/listener that this steam has been generated from hot pressurized condensate/water that has suddenly been reduced in pressure.
What is the function of a flash tank?
Flash Tanks. Wessels flash tanks are manufactured to ASME Section VIII, Div. 1 standards. Designed to 125 PSI. The function of a flash tank is to allow high-pressure condensate to flash and a reduced pressure steam. This reduced pressure steam is then used to supply heat to a “low” pressure supply main.
What is the weight of a vertical flash tank?
Armstrong Vertical Flash Tanks vary in weight from approximately 60 lbs (27 kg) for Model AFT-6 to 160 lbs (73 kg) for Model AFT-16. 1. Condensate from various points of operation enters the flash tank at relatively high pressure.
How does a 125 psi flash tank work?
Designed to 125 PSI. The function of a flash tank is to allow high-pressure condensate to flash and a reduced pressure steam. This reduced pressure steam is then used to supply heat to a “low” pressure supply main.
What is an Amtrol well tank?
Well-X-Trol ®. It’s More Than Just a Well Tank™. Amtrol invented the first pre-pressurized well tank over 50 years ago as a better solution to traditional air-over-water tanks. This revolutionary product featured an innovative design that uses a hoop ring and groove to lock the diaphragm, liner and shell together.