Blending from stockpiles can provide a consistent quality product, which ensures that specifications are met and the best possible use is made of the resources. The COALSCAN becomes fully integrated with the blending operation. This applies not only to coal producers preparing shipments, but also coal users, such as power stations or steel plants, blending coal to get the optimum product for the down stream process.
In setting up the blend, it is unrealistic to assume that the entire stockpile is homogeneous. The stockpile will have been constructed from coal from a variety of sources or washing characteristics. Calculating the required proportions of the blend using the average figures is thus risky. A smarter solution is to monitor the quality of the coal as it is withdrawn from the stockpile, and determine the blend proportions based on actual quality on the conveyor.
The major benefits of the COALSCAN Blending Control Package are:
maximise use of a low value coal resource, hence minimising the use of the high value coal product
"real time" information ensures early control action can be taken in case of unexpected stockpile quality deviations
on-line consignment monitoring gives early warning of quality deviations- no more contract penalty payments
accepts input from up to 5 stockpiles
use of individually tailored control strategies for site specific control algorithms
boundary conditions can be set for a range of parameters such as ash, moisture, sulfur, specific energy, etc.
Scantech is very pleased to recognize that Nikita...
Every power plant needs on line analysis of coal, to predict boiler efficiency and prevent deratings from boiler slagging. Increasing the number of measurements from a periodic daily 'grab' sample to a continuous online sample improves measurement precision over the single bomb calorimeter test of a composited sample of coal dust.
Stephen Smith
TVA Report 2008
Coal
