What filters bad things that come out of chimney smoke?

Question

SCIENCE PROJECT HELPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Where it comes to filtering chimney smoke, the only chimneys that are filtered are the commercial ones.  The filter used goes under different names depending on the method of filtering.  

The most common filter is called a baghouse filter.  It is just what it says it is, a structure that sets in mid smoke stream and consists of a series of fabric bag filters that remove much of the particulate matter that is spewed out of the chimney.

The second most common type of filter is called a water washer and involves the litteral washing of the smoke stream by passing it through very cold water sprays.  This removes the particulate matter and also tends to trap some of the gasses as well, dissolving them into the water stream.

Yet another method of "scubbing" the smoke stream is using ultrasonic sound, to make the particulate materials collide with each other, coalescing them into larger particles that more quickly and easily settle out of the smoke stream.

Finally, some smoke streams are filtered using an after burner to use up whatever un combusted materials are left over in the wast smoke stream.

Sometimes these methods are used in series to first filter, then scrubb the smoke leaving the chimney.

Hope this helps.

Answer 2

God