American Crystal Sugar Company, Drayton, ND

To comply with boiler Maximum Achievable Control Technology (MACT) requirements, the performance of an existing electrostatic precipitator (ESP) system was improved. In addition to repair of the existing fields (including replacing wires, weights, and transformer rectifier sets), a completely new third field was constructed. Modeling was conducted to establish the required inlet and outlet flow device modifications for flue gas to improve collection efficiencies. The MACT requirements also necessitated the relocation and extension (32 feet) of the existing stack. This work required structural design of new foundations and a stack support frame. Additional concrete work was also performed to reduce water issues in the area of the ESPs.

Mechanical and electrical engineering services were provided. Work included establishing the project scope of work and associated budget which was submitted to the Owner’s Board of Directors for approval. EAPC developed a project manual and specifications for the solicitation of bids from prequalified suppliers. EAPC also provided engineering and design of additional bid and construction packages related to power supply and ash handling system for the upgraded units. Bidding phase services were provided including disposition of bid packages and contractor bid evaluation and recommendation to the Owner.

EAPC provided on-site construction management and field engineering for the construction phase of the project. EAPC acted as a liaison between the contractor, Owner, and subcontractors.