Condition Based Preventive Maintenance Action for Coal Handling Plant of Thermal
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14-05-2010, 03:09 PM


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.ppt   Condition Based Preventive Maintenance Action.ppt (Size: 305.5 KB / Downloads: 219)
¢ Development of a Condition Based Preventive Maintenance Action for Coal Handling Plant of Thermal Power Station
¢ In the onsite operation phase, failures are the main causes of worsened performance and degraded reliability. Consequently, an effective maintenance is the main approach to failure reduction.
¢ The basic theory of condition Based Preventive Maintenance is to Propose routine inspection to identify any degradation in the integrity of the systems during their service life and to provide an early warning in order that remedial action can be taken before failure occurs.
Note :- Assessing the deteriorating condition is necessary to optimize inspection and maintenance schedules, of Coal Handling Plant to make decisions and to avoid unplanned outages.




¢ A Basic Layout of Coal Handling Plant

¢ Condition Monitoring Implementations: -
The steps in implementing CBM are :-
1. Divide Plant For Ease Of Maintenance
¢ Unloading Unit
¢ Feeding Unit
¢ Crushing & Screening Unit
¢ Stacking & Reclaiming Unit
¢ Bunkers
2. Detection Of Physical Parameters
3. In Service Examination By Using NDT
4. Analysis or Fault Diagnosis
5. Correction.
¢ Condition Measurement techniques :-
¢ In Service Examination By Using NDT :-



¢ Limitations

¢ As the plant operating conditions change, it makes it hard to compare the readings and the data scatter will be more difficult to trend.

¢ Condition based Maintenance may not easily achieve the confidence of maintenance, due to culture, management buy-in, or regulatory resistance.

¢ There needs to be a good balance between training of CBM technicians, good equipment for monitoring, knowledge of the equipment being monitored, and plant historical performance.

¢ Be aware of false indications and manage them so as not to discredit the programme.

¢ Data from the programme should be widely accessible.

¢ Although data management is very important, keep it simple so that it takes little time to get it instituted.

¢ Team work is a requirement for the programme to be successful.

¢ The CBM programme is not an all inclusive programme and must be balanced with other maintenance processes.



¢ References

¢ Technical paper on Quality Assured Maintenance Management For Coal Handling Plant by Makarand Joshi at web site plantmaintenancearticles/Maintenance_Management_QA.pdf
¢ Technical paper on Development and Implementation of Reliability centered Maintenance using Vibration Analysis: Experiences at Rourkela Steel Plant by S.Parida, N.R.Kotu, M.M.Prasad Research & Development Centre for Iron and Steel, Steel Authority of India Limited (SAIL), Rourkela Centre.
¢ Technical article received from web site wemg.co.uk of WM Engineering Ltd.
¢ Technical paper on Maintenance Method For Critical Equipments Of Coal Handling Plant by Makarand Joshi at web site plantmaintenancearticles/Critical_Equipment_Maintenance.pdf
¢ Technical paper on Application & Implementation of Residual Life Assessment Techniques For Coal Handling Plant by Makarand Joshi presented in National Seminar of The Indian Society For Non Destructive Testing 5-7 December 2002 at Chennai.
¢ Thankyou
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