Contents
What is a steam flash vessel?
The flash vessel is the main component in any flash recovery system.It can be used in all steam plants where high pressure condensate is reduced to a lower pressure , so that flash steam is formed by revaporization. This steam can be used in low pressure process or heating equipments.
What is flash steam pressure?
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.
How is flash calculated on steam?
The proportion of the condensate flashing off at 1 bar g can then be calculated as follows: In this example, if the equipment using steam at 7 bar g were condensing 250 kg/h of steam, then the amount of flash steam released by the condensate at 1 bar g would be 0.098 x 250 kg/h = 24.5 kg/h of flash steam.
How does steam flash work?
Flash steam is a name given to the steam formed from hot condensate when the pressure is reduced. High temperature condensate contains an excess of energy which prevents it from remaining in liquid form at a lower pressure. The result is that the excess energy causes a percentage of the condensate to flash.
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).
What is meant by saturated steam?
1 : water vapor in equilibrium with liquid water at or above the normal boiling point. 2 : wet steam.
What causes water to explode?
When water is heated to the boiling point the liquid water changes to gas, thereby expanding its volume greatly. Boiling is the expanding of the water molecules into the gas bubbles.
How dangerous is steam?
High pressure (HP) steam can cause severe burns to plant personnel or even fatalities. HP steam leaks are typically invisible to the human eye but are very noisy. Consequently, presence of a pinhole leak in a pipe or fitting in a noisy environment (eg.
What are the two types of steaming?
There are also two kinds of steaming methods, which are “low pressure steaming,” or also known as “atmospheric,” and “high pressure steaming.” Low pressure steaming is a process where food could be steamed through neither an indirect nor a direct contact with the steam, while high pressure steaming is when foods are …