Smoke Precipitators!

Shockingly Interesting!

Invention Of The Electrostatic Precipitators

The first use of a discharge in order to remove particles was done by Hohlfeld in 1842, but the first use of this discharge and collection via electrostatic attraction was done and patented in 1907 by Dr. Fredrick G. Cottrell.

Smoke Precipitators Broken Into Simple Steps

Air Filters

First dirty air is sent into the smoke precipitators, this air is typically smoky air or contains dust particles. They are typically found at the top of smoke stacks in order to help clean the air and reduce pollution, however there are home versions which can help purify the air.

Charging

It is then passed into the charging section where ionizer wires charge the particles via contact giving them the same positive charge, following the Law of Electrostatic Charge the like charges repel and force the newly charge particles through the machine. A little before this stage there is a pre-filter which just helps catch some of the larger clumps of particles.

Collection

After the charged particles are pushed through the ionizing section they are brought to the collection plates, these plates are negatively charged and so obeying the Law of Electrostatic Charges the positively charged particles are attracted to the negatively charged collection plates and static cling holds the particles to the collection plates. These plates have to be occasionally cleaned because of the smoke/dust particles start to pile up.

Clean Air

After the rest of the air passes through an after filter (it's there to make sure all particles have been caught) you have clean air.
http://www.youtube.com/watch?v=3hJOa-SsCEY&feature=youtu.be

Sources

"Air Pollution" 21 October 2008. HowStuffWorks.com. <http://science.howstuffworks.com/environmental/conservation/issues/air-pollution-info.htm> 12 February 2013.


McGraw Hill Ryerson. "Chapter 10 Electrostatics." ON Science 9. N.p.: n.p., n.d. N. pag. Web.


Air Quality Engineering. "Electronic Air Cleaners: Electrostatic Precipitators." Air Quality Engineering. N.p., n.d. Web. <http://www.air-quality-eng.com/>.


Wikipedia. "Invention of the Electrostatic Precipitator." Wikipedia. N.p., n.d. Web. <http://en.wikipedia.org/wiki/Electrostatic_precipitator#Invention_of_the_electrostatic_precipitator>.


Slamen, Alexander K. "Screen Recorded2013-02-12 12_41_53.mov for Science."YouTube. N.p., n.d. Web. <http://www.youtube.com/watch?v=3hJOa-SsCEY&feature=youtu.be>.


"Electrostatic Precipitators Gif." Electrostatics Gif. N.p., n.d. Web. <http://www.dlpower.cn/pic/UploadFile/esp-animation.gif>.


"Chem Heritage." Chem Heritage. N.p., n.d. Web. <http://www.chemheritage.org/Discover/Online-Resources/Chemistry-in-History/Themes/Public-and-Environmental-Health/Environmental-Chemistry/asset_upload_file536_61830_thumbnail.jpg>.