Need for Pilot Plant Investigations and Role of a Consultant for the Design of Large Capacity Coal Washeries for Thermal Power Plants in India - PowerPoint PPT Presentation

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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

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Title: Need for Pilot Plant Investigations and Role of a Consultant for the Design of Large Capacity Coal Washeries for Thermal Power Plants in India


1
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.
  • kalyan sen, former Director, CFRI-cum-CMRI,
    Dhanbad.
  • Director, CTec Pvt. Ltd. Kolkata
  • Chandan Das , CTec

2
Contents
  • Pilot Plant Investigation
  • Why at all do we need this?
  • Criteria for an ideal Pilot Plant
  • Role of a consultant in designing a washery
  • Why a Consultant?
  • Conclusion

3
Pilot Plant Investigations
  • 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.


4
Why at all we need this?
  • 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

  • Back to
    Content

5
Criteria for an ideal pilot plant
  • 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.

  • Back to content

6
Role of a Consultant in designing a Washery
  • Providing economically viable profitable solution
    to the optimum washery design problem.

  • Next

7
Why a consultant?
  • 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

8
Conclusion
  • Learn your mistakes in a
  • pilot plant
  • Earn your profits in a
  • commercial plant
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