Online Google Dictionary

backwash 中文解釋 wordnet sense Collocation Usage Collins Definition
Verb
/ˈbakˌwôSH/,/-ˌwäSH/,
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The motion of receding waves,
  1. Clean (a filter) by reversing the flow of fluid through it

Noun
  1. The motion of receding waves

  2. A backward current of water or air created by the motion of an object through it
    • - the backwash of a truck on the highway
  3. Repercussions
    • - the backwash of the Cuban missile crisis
  1. slipstream: the flow of air that is driven backwards by an aircraft propeller
  2. aftermath: the consequences of an event (especially a catastrophic event); "the aftermath of war"; "in the wake of the accident no one knew how many had been injured"
  3. wake: the wave that spreads behind a boat as it moves forward; "the motorboat's wake capsized the canoe"
  4. Backwash is a retrospective compilation of music by the group Talulah Gosh.
  5. Swash (uprush and backwash), in geography, is the water that washes up on shore after an incoming wave has broken. This action will cause sand and other light particles to be transported up the beach. ...
  6. Backwash is the backwards flow of air or water. Backwash can be created naturally by waves rebounding off a beach or other obstacle. It is created by propulsion devices such as an oar or propeller. ...
  7. "Backwash" is the seventh episode of the second season of the HBO original series, The Wire. The episode was written by Rafael Alvarez from a story by David Simon & Rafael Alvarez and was directed by Thomas J. Wright. It originally aired on July 13, 2003.
  8. The backward flow of water from oars or propeller; The similar flow of air from an aircraft engine; The result or consequence of an event; an aftermath; The saliva, spit or food particles that have flowed back into a drink after someone has drunk from it
  9. (Backwashing) A method used to remove spent powder filtration material (diatomite) from tubular filters. In this operation, the solvent flow is reversed to wash the spent filter powder off the tubular filters. See Bumping.
  10. The process of thoroughly cleaning the filter by reversing the flow of water through it with the dirt and rinse water going to waste.
  11. Rough water resulting from boat wakes rebounding off fixed objects such as canyon walls, docks or anchored boats.
  12. Backwash is a very effective membrane cleaning mechanism where a strong reverse filtrate flow is applied for up to one minute. This is applicable for all membrane types tolerating negative TMP but is not used for spiral wound membranes such as reverse osmosis.
  13. The process in which beds of filter or ion exchange media are subjected to flow opposite to the service direction to loosen the bed and to flush suspended matter (collected during the service run) to waste.
  14. A reflected wave, caused by water pushed up onto a steep grade of beach, which then rushes back out to sea against the general wave movement. This can create spectacular explosive wave effects, as the backwash and incoming waves collide.
  15. The water flowing down a beach after the swash of one wave has stopped and before the swash of the next wave arrives.*
  16. The seaward return of the water following the uprush of the waves. Also called backrush or run down.
  17. outward-moving currents that collide with incoming breakers, causing the breakers (and sometimes the riders) to get bucked upward.
  18. A reverse flow of liquid to remove solids from the filter. This backwash can be from an outside source, raw water or other fluids, from the filtrate or compressed air or even an inert gas ( for safety reasons.)
  19. to reverse the direction of flow through a filter, ion exchange column, or membrane for cleaning purposes; see also backflush.
  20. The reversal of flow through a rapid sand filter to wash clogging material out of the filtering medium and reduce conditions causing loss of head. Applies to process of removing diatomaceous earth filter prior to precoating.
  21. Disturbed water, caused by propeller action when ship is reversing
  22. The upflow or counter current flow of water through a filter medium or ion exchange medium for the purpose of expanding the media bed to remove foreign particulate matter accumulated during the service cycle flushing the discharge to drain.
  23. The upward flow of water through a resin bed to clean the resins, and in the case of a mixed bed, to separate anion and cation resins.
  24. The water returning to the sea after a wave has broken on a shore.
  25. a means of cleaning which involves reversing the flow of water through the filter, forcing the water and dirt out a "waste" line. This is done by setting the backwash valve to the backwash position. NOTE: never adjust this valve when the pump is running!