Feb. 20, 2001A new technical paper is available through the Foster Wheeler web site at #publications/tech_papers/index.cfm.
The paper, entitled “Start-up and Initial Operating Experiences at the Coke-Fired Petropower Cogeneration Facility,” covers the experience of The Petropower Energia Limitada Project, located in Talcahuano, Chile.
The facility is billed as the first public/private partnership in Chile and also the first to combine petroleum coking technology with cogeneration technology in a single project financing. The project consists of a delayed coker facility, which includes a 12,000 bpsd delayed coker unit and a 7,000 bpsd hydrotreating Unit, and a 74 MW (nominal, gross) cogeneration facility, which burns the full 656 tons/day of coke produced by the delayed coker. The coke is burned in a Foster Wheeler Circulating Fluidized Bed Boiler (CFB), and the energy produced provides electric power for the Petrox refinery, the delayed coker facility, and third parties, plus high-pressure steam for the refinery.
The single CFB boiler produces 536,000 lbs/hr. of superheated steam at 1,500 psig and 1004 degrees F, which drives an extraction pressure controlled/condensing steam turbine in a non-reheat cycle. The boiler has a design efficiency of 90.13% with a sulfur capture of 90%.
Environmentally, the overall project has resulted in a decrease in sulfur dioxide and particulate emissions from the refinery because of emission controls in the CFB, and the elimination of burning fuel oil in the old utility system.
Overall, the delayed coker facility has permitted Petrox to refine heavier, less costly crudes, and the hydrotreater unit produces cleaner gasoline and diesel products. Petrox obtained these benefits without the expenditure of capital on the project, other than a small equity investment.
The cogeneration facility has and will continue to provide a long-term, environmentally friendly solution to disposal of the high-sulfur-content coke produced by the coker, and maximizes its value as a high-BTU fuel for the cogeneration facility. The cogeneration facility has supplied all the refinery’s utility needs reliably and consistently with its expansion plans.
To learn more, visit #publications/tech_papers/index.cfm.