What is a flash operation?

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. This process is one of the simplest unit operations.

What is a flash process in chemical engineering?

[′flash ‚präs·əs] (chemical engineering) Liquid-vapor system in which the composition remains constant, but the proportion of gas and liquid phases changes as pressure or temperature change.

What is the use of flash distillation?

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.

What is the function of flash drum?

A vapor–liquid separator may also be referred to as a flash drum, breakpot, knock-out drum or knock-out pot, compressor suction drum, suction scrubber or compressor inlet drum, or vent scrubber. When used to remove suspended water droplets from streams of air, it is often called a demister.

What is flashing of a liquid?

Flash (or partial) evaporation is the partial vaporization that occurs when a saturated liquid stream undergoes a reduction in pressure by passing through a throttling valve or other throttling device. Both the vapor and the residual liquid are cooled to the saturation temperature of the liquid at the reduced pressure.

What are flash calculations?

A mixture when flashed to conditions between bubble and dew point separates in vapor and liquid phases. Flash calculation is done to determine vapor fraction and composition of liquid, vapor formed when a mixture is flashed at a given pressure and temperature.

What do you mean by flash point?

flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. The flash point is a general indication of the flammability or combustibility of a liquid.

What is meant by flash separation?

[¦flash ‚sep·ə′rā·shən] (chemical engineering) Process for separation of gas (vapor) from liquid components under reduced pressure; the liquid and gas remain in contact as the gas evolves from the liquid.

What is flashing of liquid?

flashing liquids. mixture of liquid and vapours. Explanation: a mixture of liquid and vapours that is prepared to suddenly outburst / to flame under certain temeprature and pressure conditions.

What is cavitation and flashing?

Flashing is an in- to- out event while cavitation is an out- to- in event. Flashing occurs at low pressure and cavitation occurs when the low-pressure bubbles collapse at the high-pressure region within the pump casing producing a shock wave.

What is isothermal flash?

The isothermal multiphase flash problem is one of the most important engineering problems encountered in modeling chem- ical and petroleum processes. The aim is to predict for a multi- component system at fixed pressure and temperature, the num- ber, identity, and composition of phases at equilibrium condi- tions.

What is flashing liquid?