Senin, 06 Agustus 2012

Blending of Coals in Power Stations Dr V T Sathyanathan (Former General Manager BHEL, Trichy) Technical Advisor, CVL, Trichy


Coal blending in power station is mainly adopted to reduce the cost of generation and increase availability of coal.  The low-grade coals can be mixed with better grade coal without deterioration in thermal performance of the boiler thus reducing the cost of generation.  Many nations, blending of coal were being adopted for a very long period mainly for increasing the availability of coal for power generation.  To improve the availability of coal and also to improve the calorific value of coal being fired, some of the power stations look at the possibility of mixing high grade imported coal with the low grade high ash coals.

There are many methods adopted for blending which can be at Coal Mines, Preparation Plants, Transshipment point and Power Stations.  The method to be chosen will depend upon the site conditions, level of blending required, quantity to be stored and blended, accuracy required and end use of blended coal.   Normally in large power stations, handling very large quantity of coal, the stacking method with fully mechanized system is followed.

0 komentar: