Process Heat Recovery Project

Services
Feasibility Study
Detailed Engineering
Process Balances
Cost Estimating

Year
2001-2002

In February 2001, this pulp and paper mill client retained Temec for a process heat recovery study, with the goal of reducing effluent volume and natural gas costs.

Temec identified two sources of high grade hot water that were either being sewered or not used to their full potential. Temec developed the scope and estimated cost for a suitable hot water collection system, and investigated potential uses for the reclaimed hot water. Temec also provided estimates of capital cost and annual benefits.

After studying a number of options for recovery and usage of this waste heat, Temec designed a new pulp mill hot water system, to help provide clean hot water to brown stock washer showers at a consistent high temperature.

The system was implemented in 2002 and resulted in estimated annual savings of $1,400,000 per year in energy costs, improved washing and an estimated 99.5 m3/hour reduction in mill effluent and water treatment flows.