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Blowdown or Blowing down may refer to: Windthrow or forest blowdown, a felling of trees by windstorm; Blowdown stack, a vertical containment structure at a refinery or chemical plant; Blowdown, a process plant controlled or emergency depressurization; Boiler blowdown, a steam-boiler process to remove impurities
Several short blowdown events remove sludge more effectively than a single continuous blowdown. Shorter blowdown events cause less significant changes in boiler water level, and are safer during periods of high steam demand. [5] Bottom blowdown piping drains the lowest parts of the boiler so it can be used to drain the boiler for servicing.
Blowdown is an internationally broadcast documentary television series that follows a team of explosive demolition experts as they prepare and implode iconic, complex and challenging structures around the world.
A blowdown stack is an elevated vent or vertical stack that is used to vent the pressure of components of a chemical, refinery or other plant if there is a process problem or emergency. A blowdown stack can be used to complement a flare stack or as an alternative.
Disposal of blowdown fluids is generally to flare systems or, if safe to do so, non-fired blowdown drums. Blowdown may be strategically delayed by fire zone to shave peak flow and allow the flare to deal with the incoming gas. This is generally referred to as a staggered blowdown. Depressurization facility.
Windthrow is common in all forested parts of the world that experience storms or high wind speeds. The risk of windthrow to a tree is related to the tree's size (height and diameter), the 'sail area' presented by its crown, the anchorage provided by its roots, its exposure to the wind, and the local wind climate.
The Great Olympic Blowdown, also called the Big Blow, was a compact, intense windstorm that struck the coast of Washington on January 29, 1921. The storm is remembered for the massive number of trees destroyed. At the time, it was the greatest loss of timber in the country, according to the Forest Service. [1]
A blowdown valve (BDV) is a type of shutdown valve designed to depressurize a pressure vessel by directing vapour to a flare, vent or blowdown stack in an emergency. BDVs fail-safe to the open position upon failure of the control system. [1] The type of valve, type of actuation and performance measurement are similar to an ESD valve.