Democratic Sentinel, Volume 18, Number 7, Rensselaer, Jasper County, 2 March 1894 — Washing Soft Coal Smoke. [ARTICLE]

Washing Soft Coal Smoke.

First, the smoke is drawn from the stack by a powerful fan, and it is then forced through a revolving cylinder into a tank filled with water. Perforated beaters are fixed to the back of the cylinder and these drop into the water and scrub or wash the smoke, which is put back into the chimney in the form of a perfectly pure vapor. The soild carbon, which is washed from the smoke, ifi brought out at the bottom of the tank all bubbling and boiling over, to all appearance a black foaming froth. The arrangement of the apparatus allows an inspection of the washing process, and of the vapor, which, after the cleansing has been performed in the tank below, is perfectly white and odorless,' and thrown through the chimney into the air as steam. It is an interesting fact that the black extract is admirably adapted for use in the composition of paint and priming ink, while the ammoniated water remaining after the washing, possesses the properties of a powerful disinfectant. —[Philadelphia Ledger.