Flotation of Cleaner Rejects Removes High Density Stickies, 2005 Engineering, Pulping & Environmental Conference
The build-up of ink and stickies in forward cleaner systems can be avoided by installing a flotation cell on the first or second stage of the forward cleaner rejects. Installing such a hybrid system in a deinking plant improved the dirt removal efficiency from 96% to 98%; removed stickies in the forward cleaner rejects; and removed small stickies in the dilution water. As a result paper machine downtime was reduced.
These high density, hydrophobic stickies were removed by operating an efficient flotation cell at a very low consistency with a high amount of air bubbles. “Hairy stickies” are more difficult to remove. Some operating results from a deinking plant before and after installation of the hybrid cleaner – flotation cell are reported.
Flotation of Cleaner Rejects Removes High Density Stickies, 2005 Engineering, Pulping & Environmenta