Canfor Pulp Submits Two Green Transformation Projects

By 250 News

Prince George, B.C.- Canfor Pulp Limited Partnership is inviting comments from interested and affected parties  on its  projects  under the  Pulp and Paper Green Transformation Program (PPGTP).

Canfor Pulp  qualified for $122.2 million dollars  under that fund for approved capital projects with environmental  benefits.   Two projects have been submitted to Natural Resources Canada for the “Screening Level Assessment”

The first two CPLP projects submitted to Natural Resources Canada (NRCan) under the PPGTP are the PG Pulp Mill Odour Reduction Project and Increased Biofuel Power Generation Projects. Environmental Impact Statements were prepared for both of these projects as a part of the submissions.

Northwood Pulp Mill Green Transformation Project

The Northwood #1 Recovery Boiler is the largest single point source of pulpmill odour in Prince George.

A key environmental benefit of the project will be an estimated reduction of ‘odourous’ “Total Reduced Sulphur” (TRS) compounds by 70% from current levels.

This project will also have a number of other important environmental benefits, including reduction of particulate emissions from the #1 Recovery Boiler by 50% and reduced fossil fuel (natural gas) consumption.

As a result of the local concerns regarding formaldehyde, the predicted formaldehyde emissions from the #1 Recovery Boiler Project were evaluated. The project is not expected to contribute any measureable formaldehyde to the Prince George air shed. The predicted formaldehyde in the stack is well below the accepted workplace exposure limits with 270% less than the long term workplace exposure limit and 740% less than the short-term workplace exposure based on the US OSHA standards. In addition, immediately after leaving the stack, ambient levels of formaldehyde that may result from these predicted stack emissions, will be reduced even further through natural dispersion.

PGI Mills Green Transformation Project

The Prince George and Intercon (PGI) Mills Green Transformation Project involves the following upgrades:

#1 Power Boiler Precipitator

Steam production from the #1 Power Boiler at the PG Pulp Mill is currently constrained by particulate emission limits in the air permit. Installation of a new Electrostatic Precipitator (ESP) to process the flue gas from the boiler will reduce particulate emissions and thus enable the boiler to generate approximately 20 t/hr of additional steam from biomass. This steam will be used to generate approximately 4 MWh/h of additional biomass power from the PG Pulp Mill turbo generator.

The current average particulate emissions from the #1 Power Boiler are approximately 220 mg/m3 (23.8 kg/hr), representing the single largest source of particulate from pulp mill sources in the Prince George air shed.

Particulate emissions from the #1 Power Boiler, after implementation of the ESP project, are expected to average 60 mg/m3 (7.9 kg/hr).

Upgrade Boiler Feed Water Systems

Water is obtained from the Nechako River for steam production in the boilers. To prevent the accumulation of undesirable materials, a significant portion of the heated water is released as “blow down” resulting in heat and water losses. By improving water quality through a Boiler Feed Water System Upgrade, it is estimated that boiler blow down rates would be reduced to 1.5% from the current average of 8%.

Canfor Pulp & Paper has contracted Rescan Environmental Services Ltd to assist the company with preparation of the Environmental Impact Statements for its PPGTP projects. Comments can be submitted to the Environment Manager, Canfor Pulp & Paper by email  (Glenda.Waddell@canforpulp.com) or by fax (250–561-3668) before May 14, 2010.

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