Total Running Cost Reduction by Installing a Shoe Press

Abstract

Several problems intrinsic to a roll nip press can be solved by a shoe press. A shoe press has a wide nip width, six to seven times as that of a roll press, which gives lower nip pressure and higher water drainage during the operation.
By installing a shoe press, improved water drainage at a press results in higher dryness after the press section, and makes it possible to increases its machine speed by 20-30 percent with the same numbers of dryers. The expected better sheet strength will reduce frequency of sheet breaks, and will result in higher machine efficiency.
A sheet dewatered by a shoe press has a relatively uniform fiber composition in the zdirection (thickness), which makes operation at drying and size-press coating far less complicated. The control system itself can be simplified.