Particle Collection In Wet Scrubbers
Wet scrubbers capture relatively small dust particles with large liquid droplets. In most wet scrubbing systems, droplets produced are generally larger than 50 micrometres (in the 150 to 500 micrometres range). As a point of reference, human hair ranges in diameter from 50 to 100 micrometres. The size distribution of particles to be collected is source specific.
For example, particles produced by mechanical means (crushing or grinding) tend to be large (above 10 micrometres); whereas, particles produced from combustion or a chemical reaction will have a substantial portion of small (i.e. less than 5 micrometres) and submicrometre particles.
The most critical sized particles are those in the 0.1 to 0.5 micrometres range because they are the most difficult for wet scrubbers to collect.
Droplets are produced by several methods:
- Injecting liquid at high pressure through specially designed nozzles
- Aspirating the particle-laden gas stream through a liquid pool
- Submerging a whirling rotor in a liquid pool.
These droplets collect particles by using one or more of several collection mechanisms such as impaction, direct interception, diffusion, electrostatic attraction, condensation, centrifugal force and gravity. However, impaction and diffusion are the main ones.
Read more about Particle Collection In Wet Scrubbers: Impaction, Diffusion, Other Collection Mechanisms, Bibliography, External Links
Famous quotes containing the words particle, collection and/or wet:
“Experience is never limited, and it is never complete; it is an immense sensibility, a kind of huge spider-web of the finest silken threads suspended in the chamber of consciousness, and catching every air-borne particle in its tissue.”
—Henry James (1843–1916)
“Bolkenstein, a Minister, was speaking on the Dutch programme from London, and he said that they ought to make a collection of diaries and letters after the war. Of course, they all made a rush at my diary immediately. Just imagine how interesting it would be if I were to publish a romance of the “Secret Annexe.” The title alone would be enough to make people think it was a detective story.”
—Anne Frank (1929–1945)
“the tide lays down its wet throat
and alters the land to island—even as I watch
I say there is no shore
apart from stories of it,
no smoke, no hut, no beacon ...”
—Lynn Emanuel (b. 1949)