Equipment Supplied

2 Nos. silo-feed chain bucket elevator.

Year of installation

May 2001.

Material Handled

Cement + fly-ash.

Capacity

240 TPH

Height

59.55 m.

Chain used

TSUBAKI, JAPAN make CNBH-600-T-36-A.

Actual Chain life attained till now

more than 40,000 hours.

Present status of the system  

Operating satisfactorily.

Conclusion

Chain bucket elevator has been operating satisfactorily - for handling cement + fly-ash. Main contributing factors are the quality of chain links, workmanship and correct on-site alignment.

System supplied

Mechanical ash handling system.

Year of commissioning

Systen-I   : End – 2003 (JP Rewa Cement).
System-II : End – 2004 (JP Bela Cement).

Material handled

Bottom-ash, economizer fly-ash, air-heater fly-ash, ESP fly-ash.

Maximum capacity

40 TPH.

Total conveying distance

115 m (Horizontal).
  25 m (Vertical).

Maximum Temperature

300 degree Celsius.

Advantages of
Mechanical Ash handling

1. No isolation of conveying  equipment  –  from  the  boiler circuit required.
2. Mechanical system works satisfactorily even under negative system pressure.
3. Handles ash having temperature up to 300 degree Celsius.
4. Continuous operation requiring very few controls.
5. Operates with less than 30 % Power consumption  as compared to the power consumed for a conventional pneumatic dense phase ash handling system – for the identical application.
6. Less than 70 %  initial investment.
7. Compact conveying system.

Conclusions

Mechanical conveying of ash - based on chain conveyors and bucket elevators offers an economical solution for the ash handling requirements within a captive power plants - for limited conveying distances.
However, the reliability of operation depends upon correctly conceptualized systems design, quality of workmanship.