Palm Paper Starts Up Giant Pulping Drum DIP System in England

Palm Paper, King's Lynn, England, reports to have commissioned the world's largest DIP (deinked pulp) capacity (1,500 metric tpd) stock preparation line, supplied by Voith Paper of Germany. One crucial factor in the success of the stock preparation facility, Voith notes, is its continuous pulping capacity using only a single TwinDrum. During startup, a pulping capacity equivalent to 2,400 metric tpd was achieved over the course of several hours, making the TwinDrum in King's Lynn the recycled paper pulping unit with the highest input capacity for DIP in the world.

Recovered paper is mixed in the TwinDrum with water at a stock consistency of 25%, which is gently pulped and then separated from the reject. The TwinDrum consists of a pulping drum and a sorting drum, which provide the ideal conditions for both processing steps. As a result, compared with conventional, single-section drum pulping systems, it is possible to reduce the use of chemicals by 20% - 40% in addition to reducing the energy used by about 20%.

The TwinDrum for King's Lynn is the largest drum pulping unit that Voith Paper has ever delivered. The second of these giants, Voith reports, is already in the construction phase.