FMC Technologies supplied a coal handling system for a new unit in a power plant in Canada.
The new coal handling system is an expansion of the existing system and provides coal to six storage silos, which feed the new Unit #3 boiler. This unit is under construction and scheduled for commercial operation in February 2005.
The coal handling system is designed to handle 0 x 38 millimeter sub-bituminous coal. The coal is transported on a 106 centimeter-wide belt conveyors running at an approximate speed of 2.3 meters/second and at a rate of 750 metric tons per hour.
The new conveyors initiate at the discharge of existing CV7A and CV7B conveyors, with a capacity of 1,500 MTP each. The new conveyor CV12A is fed by a splitter gate from existing conveyor CV7A and CV12B is fed by conveyor chute work from conveyor CV7B in a similar manner. Any coal beyond the capacity of CV12A and CV12B is sent to existing conveyors CV8A and CV8B via the splitter gate.
The conveyors CV12A and CV12B are approximately 116 meters long and incline at an angle of five degrees. These conveyors are enclosed inside of a tubular gallery, which spans from the existing boiler building to the new boiler building. The tubular gallery is larger in diameter at the tail end to provide access to the loading skirts. The gallery then tapers to a small diameter and has a central walkway extending to the new boiler building. The CV12A and CV12B conveyors terminate at discharge chutes in the new boiler building where their drives are located. Chutework form the CV12A and CV12B conveyors feed the coal onto the new CV13A and CV13B conveyors. This chute work is designed so that future two-way diverter gates can be installed in the event that the future CV14A and CV14B conveyors are added.
The new CV13A and CV13B conveyors are approximately 33.5 meters long and are included at the tail end and go through a convex curve to the horizontal position. The conveyors are supported on the new boiler building steel, at elevation 51,000, and extend to their discharge chutes located between two silos. These chutes, feed shuttle conveyors CV15A and CV15B.
The new CV15A and CV15B shuttle conveyors are designed to run in both the forward and reverse directions. These conveyors are mounted on rails and feed the six storage silos.