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Kalyan sen

TOWARDS AN ENERGY EFFICIENT NATION. ISO 9001 INSTITUTION. Possible Routes for Beneficiating High Ash Indian Coals for Thermal Power Station. Kalyan sen. By Kalyan Sen Central Fuel Research Institute, Dhanbad, India. TOWARDS AN ENERGY EFFICIENT NATION. ISO 9001 INSTITUTION.

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Kalyan sen

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  1. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Possible Routes for Beneficiating High Ash Indian Coals for Thermal Power Station Kalyan sen By Kalyan Sen Central Fuel Research Institute, Dhanbad, India

  2. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Characteristics of Indian Coals • Constrains: • Genetic: • High inertinite content • High moisture content • Operational: • Mechanised mining in large OCP • Organizational: • Multiple sources/Linkages Favorable Qualities: • Low sulfur Content (<0.6%) • High AFT ( >1100 oC) • Low iron content • Low Cl2 content (<0.1%) • Low toxic trace elements • High reactive inertinites

  3. washeries TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Beginning of the conscientious effort : Kalinga (8.0 Mty) at Talcher : coming

  4. barriers TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Identified Barriers For Beneficiation of Indian Non-coking Coal • Economic Barrier • Policy Barrier • Technological Barrier

  5. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Optimum Beneficiation Strategy The beneficiation strategy should focus not on maintaining a prefixed overall ash limit but on restricting the non-combustibles to an optimally minimum level corresponding to the limiting quality parameter/s parameters to be considered • Characteristics ash value < 50 - 55% • Heat value • Petrographic reactives

  6. Characteristic Ash TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION

  7. routes Possible beneficiation schemes for power coal Ash% reducn M % over ROM coal Level Scheme Methodology Cleans (%) TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION I Dry benefin. Separation of stone/shale based on differential breakage potentiality 3-4 >90 Nil Crushing, screening & coarse coal cleaning II Coarse coal (13/30mm) washed & mixed with untreated fines; dewatering screens. <10 70-90 2-3% Coarser fraction washed at optimum efficiency levels: fine coal by Spiral: dewatering Crushing, screening and total cleaning >10 <60 3-4% III

  8. pred-yield TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION

  9. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION CONCLUSION: • Improvement of the overall efficiency and environmental performance of the coal-energy chain demands • beneficiation of Indian coal as an integral component for thermal power generation • proper identification and removal of the barriers that act against implementation of the coal washing strategy Continued….

  10. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION CONCLUSION: • modification/ modernisation of the existing washeries or installation of new washeries with improved process design in view of changed feed characteristics of the ‘difficult-to-wash’ coals. • beneficiation strategy based on some intrinsic quality parameters that guarantee the presence of desired reactive combustibles in the product.

  11. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Thank you

  12. TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Beneficiation of Indian non-coking coal appears to be the best option, if not a bare necessity for achieving quality consistency of the supply to TPS and subsequent improvement in cleaner energy production.

  13. economic TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION Economic Barriers • From producers’ point of view: • Additional cost of washing • Shortfall in target supply at the desired • level of quality parameters • Present system of grading and pricing of coal • Resource constraints for coal companies Contd…..

  14. economic2 Economic Barriers TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION • From users’ point of view: • Reluctance to enter into commercially enforceable agreement • Additional cost of washing • Lack of appreciation of benefits of washing • Availability of cheaper imported coal at port site • Lack of ineterest by SEB’s for setting up new washeries

  15. policy TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION PolicyBarrier • Present regulatory framework that needs to be reviewed as investor-friendly • Lack of proper ambience for inviting private investors • Imbalance due to existing duty structure • Existing system of coal linkages

  16. tech-barriers TechnologicalBarrier TOWARDS AN ENERGY EFFICIENT NATION ISO 9001 INSTITUTION • Difficult to wash coal: need costlier deep beneficiation • Suitable washing scheme for desired products • High moisture content, 6-10% • Loss of coal in Washery rejects • No suitable techno-economic outlet for rejects

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