Wednesday, 2 May 2012

De-Inking Cell


De-Inking Cell

The purpose of de-inking is to remove the printing inks and other substances like stickies that might effect the paper making process or the final properties of the paper. In a de-inking process the should be first detached from the fiber. Flotation technology with high efficiency provides high yield of fibers and simple handling with maximum operating reliability.
The primary flotation stage ensure highest possible stock purity and the secondary stage optimized flotation yied without an loss of brightness and cleanliness. A De-aerator cyclone removal air from the stock and usable fiber are recovered from the foam.
Principle Of Operation: 
The Parason De-inking cell consists of number of cells in series with elliptical cross section with a baffle extending over the entire cross length to separated suspension chamber. Air (at the atmospheric  pressure and pulp stock to be de-linked is introduced into the cell chamber through injectors. Flow through nozzles generated vacuum which sucks in the necessary process and generates micro turbulence resulting in widely ranging bubble sizes enabling efficient removal of an equally wide range of particles size. The injector optimize the quantity of the air injected and the size of the bubbles generated.

The pulp stock freed from ink is pumped from the bottom of one cell to the next cell. The ink laden foam overflow to the foam chamber with the help of motorised paddle. Flotation process is operated a continuous mode and help to removal ink particles efficiently. Since the cells are interconnected by opening only level control system is required for entire flotation machine.
 For more information please  visit   De-Inking Cell...!

Salient features of the PARASON DE-INKING CELL

• Highest possible degree of brightness is achieved
• Improved optical cleanliness in recovered paper stock.
• No sizing restrictions
• Single level control loop operation.
• Optimized flotation yield at secondary stage without loss of brightness and cleanliness.
• Very low fiber loss in the de-inking process the foam is treated in a cascade process.
• High percentage of ash in reject resulting in low fiber losses

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