Hot Water Heat Recovery

Catalyst Paper - Elk Falls Division

Catalyst Paper Elk Falls Division retained the services of Allnorth to design and implement a heat recovery system, that reduced both water use and steam consumption in the Kraft Mill. The first phase involved reclaiming warm water, produced by the R8 generator, and blending it with fresh mill water, used as the cool stream feeding the Bleach Plant caustic effluent heat exchangers.

The second phase involved reclaiming excess warm water from the recovery evaporator surface condensers to displace fresh water going to the M&D digester blow heat recovery system. Overall, this project reduced steam consumption by approximately 3.3 kg/s and lowered mill water usage by approximately 60 l/s.

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