SPECIFICATION SHEET • SI METRIC
CAT: PAPER

Digester Liquor Ratio

Calculate dry wood, inherent water, and added cooking-liquor mass from wet wood moisture and a target liquid-to-dry-wood ratio.

OPERATING LIMITS — Mass-balance calculation only; confirm liquor-ratio and active-chemical definitions.
INPUT DESIGN PARAMETERS (SI)
tonnes
%
ratio
CALCULATED SPECIFICATION OUTPUT
Dry Wood
55 tonnes
Water in Wood45 tonnes
Required Liquor175 tonnes

Technical Methodology & Engineering Principles

GOVERNING EQUATION
Water in wood = wet wood × moisture fraction; dry wood = wet wood − water; added liquor = max(0, dry wood × target liquid/wood ratio − water in wood).
Assumptions & Scope

Moisture is entered on a wet basis and inherent wood water contributes to total liquid. Liquor density, active alkali, chip voids, impregnation, and recovery-cycle chemistry are excluded.

Operating Range & Boundary

Wood mass and target ratio must be non-negative; moisture must be between 0% and 100%.