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National Seminar on “Coal Preparation & New Coal Washing Techniques” at IICM during December 3-4, 2010. kalyan sen, former Director, CFRI-cum-CMRI, Dhanbad. Director, CTec Pvt. Ltd. Kolkata & Chandan Das , CTec

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Need for Pilot Plant Investigations and Role of a Consultant for the Design of Large Capacity Coal Washeries for Thermal Power Plants in India. National Seminar on “Coal Preparation & New Coal Washing Techniques” at IICM during December 3-4, 2010. - PowerPoint PPT Presentation

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Page 1: Contents

National Seminar on “Coal Preparation & New Coal Washing Techniques” at IICM during December 3-4, 2010.

kalyan sen, former Director, CFRI-cum-CMRI, Dhanbad.

Director, CTec Pvt. Ltd. Kolkata& Chandan Das , CTec

Page 2: Contents

Pilot Plant Investigation Why at all do we need this? Criteria for an ideal Pilot PlantRole of a consultant in designing a washery Why a Consultant?Conclusion

Page 3: Contents

Why at all do we need this?• To optimize the slurry circuit for preparation of coal,

particularly from virgin seams.• To know the Particle size distribution of ROM, crushed,

degraded coal and fines generated• To confirm the computer predicted results for practically

achievable yield of cleans at a certain parameter of cut and/or Ash%

• To determine the optimum size of screens, considering the kinetics of screening

• Optimum quantity of water spraying during deslimming, rinsing, etc.

• Sufficient washed coals for downstream trials, like combustion study, characteristics of ash forming minerals e.g. ash erosion, clinkering, agglutinating, etc.

Contd…. Contd….

Page 4: Contents

• Choice of a suitable crusher• Choice of a suitable screen of particular type and

size• Finalization of type and size of washer• Optimum parameters and the range of variation for

washing parameters• Choice of flocculants, etc. and rheological properties

of thickened slurry• To overcome the limitations of testing lab to deliver

the above said points

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Page 5: Contents

Stability of the coal handling equipment e.g. Bunkers, Feeders, Chutes, Conveyors, Load out stations, etc.

To collect the requisite amount of sample (as per IS / ISO) without jeopardizing the system.

Minimum capacity of a pilot plant depends on the Top Size of coal viz. 40tph for -100mm, 2-3tph for -3mm feed, etc.

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Page 6: Contents

Providing economically viable profitable solution to the optimum washery design problem.

Next

Page 7: Contents

They know the subject in depth They know all the angles They know all the authorities They know the laws on pollution and they know

the means of solving the particular problem. They spare you from studying a phase of

engineering which is not your domain. They know where to go to get any information

needed, which will help them solve the problem.

Back to Content

Page 8: Contents

Learn your mistakes in a pilot plant

Earn your profits in a commercial plant


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