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Clean Coal Technology

Clean Coal Technology. Liquid Coal as Coal Water Mixture (CWM) Presented by Sukhdev Singh, Adviser on CWM. History What is CWM? Making CWM Properties Advantages Making slurry from lignite Disadvantages Facts Vs Facts Comparative Study Live Examples CWM Ball Mill

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Clean Coal Technology

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  1. Clean Coal Technology Liquid Coal as Coal Water Mixture (CWM) Presented by Sukhdev Singh, Adviser on CWM For NTPC

  2. History • What is CWM? • Making CWM • Properties • Advantages • Making slurry from lignite • Disadvantages • Facts Vs Facts • Comparative Study • Live Examples • CWM Ball Mill • Business potential in India • Way Forward Table of Contents

  3. In 1970, world wide oil crisis accelerated the development of CWM as an alternative fuel and many countries researched on CWM. In 1980 CWM technology began to be applied for spectrum of Industries • Today there are more than 100 plants based on CWM as fuel and running successfully across the world and producing around 75,000 MW. These are new as well as retrofitted plants . Single units range from 1 to 600 MW • China • Japan • Russia • Italy • Indonesia • Philippines • Malaysia • South Korea History

  4. A mixture of 66-69% micromesh coal plus 30-33% water and 1% additives • Rheological properties like oil • Stored like oil • Stability of 90-120 days and more • Easy to transport in tankers, pipe line & sea vessels What is CWM?

  5. Wash the Coal • Crush • Pulverize in Ball Mill, add Water & Surfactants • Put in the agitator • Filter CWM Slurry • Add stabilizer & put in agitator again • Put required additives & agitate again • Transport to Storage Tanks Making CWM

  6. Consistency - solids 66±2 % • Viscosity - (100S) 1200±200 M Pa.s • Average granularity – 4 38 Micron • Ash content < 7 % • Sulphur content <0.5 % • Volatile matter - 28.02——34.53 % • Calorific value 4000-4800 Kcal./Kg • Stationary phase 90-120 days – can be extended Properties of CWM

  7. Environment Friendly- Vs -Coal • Nox Levels are reduced by 50% • Sox Levels are reduced by 80% • SPM Levels are reduced by 40% • CO2 Levels are reduced by 15-20% • CDM benefits shall be there • Compared to coal • Combustion efficiency is >99% against combustion efficiency of 90-91% for coal • Boiler efficiency is 94 % as compared to 90-91% for coal fired Boilers • Damage to Water walls is less • Soot formation is less • ESP is much smaller • Cost of generation of 1KWh is less than Coal selectively • Other reasons • Land required 70-80% less • Cost of plant is less as very little coal handling • No major ash handling as ash is 6-7% • Low O&M cost • More fuel inventory possible for emergency • Neat and clean plant • Completely safe to handle • No fear of thefts • 90-120 days or more self life • Loading and unloading time is less • Lignite can be extensively used for Coal slurry (explained in next slide) Advantage of CWM

  8. Making slurry from Lignite 8

  9. Uses high CV and Low ash Coal but lignite can be used to make slurry. Since ash content in Lignite is low, the slurry can be of good quality • CWM cost is higher than pulverized fuel coal • Technology is restricted but available • CWM facility needs additional investment but • overseas companies can supply CWM like Coal • Loss of 200 Kcal on account of water Content Disadvantage of CWM

  10. Facts Vs Facts

  11. Comparative study • What looks better?- Let us think together

  12. CWM Storage • CWM plant in China Live examples

  13. Power Plant (0.6 Mt/a for 3×230 t/h boilers transformed from burning oil to burning CWM)- the first power plant in China to use single CWM as fuel CWM Power Plant (1.5 Mt/a for 2×670t/h boilers)– New Plant • Power Plant (1.5 Mt/a for 2×220 t/h +2×410 t/h boilers transformed from burning oil to burning CWM)- the demonstration project using the largest CWM preparation and burning system in China CWM Plants in operation

  14. CWM manufacturing Ball Mill

  15. Captive Power plants in India- 20,000 MW • Diesel /FO based Power Plants- 7000 MW • CWM required for 7000 MW- 35 Million tonne/annum-(Valued at $170/tonne) • Business Volume: $8500 million /Annum • Profitability: 10% ( $850 million / Annum) • CDM benefits shall be there to end users Business Potential in India-Captive Power Generation

  16. To make detailed Project Study/Report on CWM & take action accordingly To introduce use of CWM in national planning in place of OIL and Coal where ever possible as is the case in China To establish R&D on CWM Center in association with reputed companies in the world To create service organizations as JV with technology/ equipment suppliers and laying of slurry pipe lines Proposed Plan – Way forward

  17. Questions ? Sukhdev Singh-Advisor on CWM Mobile: +91 9871405657 E-mail:sukhdevsingh51@yahoo.com Thanks

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