Weyerhaueser Columbus Mill

4335 Carson Road

Columbus, MS 39701


Challenge:  Design, manufacture and install a new Dry ESP for a combination boiler to bring the Weyerhaeuser Columbus Mill into MACT compliance.  Outlet emissions required to be within 0.03 lb/MMBtu with a 10% opacity, when burning wood waste, oil, natural gas, NCG or a combination of these fuels.


Southern Environmental’s Solution:

Southern Environmental, Inc. designed, built and installed a new Dry ESP complete with new ductwork.  Tie in of the new unit took place during the plants 6 day, October 2015 outage. During the outage Southern Environmental, Inc. demolished existing ductwork at the multiclone and stack to accommodate the new ESP ductwork.  The new equipment required modification of the existing access platforms and steel. Various ductwork designs were evaluated to achieve the most economical arrangement from a total cost perspective while maximizing operational flexibility.  Various options of total capital cost, pressure drop, and ash drop-out potential where presented to Weyerhaeuser in order for them to choose a design to best fit their operational objectives and cost.

Project Duration:

· PO Received: September 2014

· Materials delivered: July 2015

· Start-up: October 2015


Detailed Engineering in the following disciplines:

· Structural

· Mechanical

· Electrical

· Airflow Modeling


Fabrication and Erection Services:

· Installation of ID Fan

· Installation of new ash conveying and silo system

· ESP fabrication and installation

· Access fabrication and installation

· Field technical support and start up

· Insulation installation

· Installation of complete weather enclosure with overhead bridge crane

· Installation of approximately 346 feet of ductwork



Performance Guarantee:

Filterable particulate emissions from the new ESP will not exceed 0.03lb/MMBtu.  Actual emissions were far lower with opacity below 5%.



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