ANDRITZ LimeLine white liquor plants – ecologically sound and economically efficient
ANDRITZ PULP & PAPER continues to develop technologies which minimize environmental impact by recycling and reusing process streams inside a mill, rather than relying on end-of-pipe removal. This is particularly true in the white liquor plant, where the conversion of green liquor into high-quality cooking liquors is performed with great efficiency.
The major challenge in the white liquor plant is turning green liquor (the smelt from a recovery boiler) into pure white liquor that can be reused in the pulping process – with minimal energy consumption and environmental impact. Critical factors such as air emissions, energy efficiency, solid waste (dregs), and white liquor purity must be considered when selecting the equipment for the white liquor plant.
ANDRITZ has been an innovator in recausticizing, lime reburning, and auxiliary processes, and offers a strong portfolio of LimeLine components for each process stage and support operation. The scope includes process solutions for chemical conversion and filtration, equipment for the various steps of preparing cooking liquors, and on-going services. The product portfolio ranges from traditional white liquor production to other modified delignification liquors for kraft pulping. ANDRITZ draws from a project experience of numerous new recausticizing plants, plant modernizations, new lime reburning kilns, kiln modernizations, and several plants for white liquor oxidation or modified white liquors worldwide.
LimeLine components are designed as stand-alone unit processes, and offer truly superior performance when integrated into a modern, energy-efficient, and environmentally safe production line. The results are reduced and cleaner air emissions, energy efficiency, reduced loads to the landfill, and high white liquor quality – even with the closed-cycle process loops.
Processes and technologies available from ANDRITZ
- Lime reburning
- White liquor modification