BAYSWATER POWER STATIONPage 1
Bayswater Power Station
PLANT NOTE NO: 485/7
DATE OF ISSUE:28thMAY 2010
AUTHOR:K RYAN
SECTION:FUEL SUPPLIES
OPERATOR LECTURE SECTION:CP
TITLE:COAL BLENDING
It is imperative that Bayswater Power Station manages environmental issues diligently. The adequate blending of coal prior to its delivery to the Unit Bunkers is a critical issue in the operation of Bayswater Power Station.
General blending principles are discussed below and in the accompanying flow charts.
Consistent and conscientious efforts must be made to ensure that only coal with a calculated emission level of 535ppm SOx or less is delivered to the Unit bunkers. This level should only be exceeded with the approval of management.
The following principles and instructions summarise what has already been published in Coal Plant Weekly Plans, Operator Training Day lectures previous plant notes and DOI Notes.
DISCUSSION
The importance of good record keeping cannot be over emphasised. Accurate CPO logs should, as a minimum include:
1all delivery details for incoming coal, including the calculated emission value of each coal blend being delivered.
2the destination of the incoming coal once delivered.
3the sources of coal used to refill the unit bunkers.
4the bunkering levels at the beginning/end of the shift.
5the estimated level of the stacker/reclaimer stockpiles after consumption or replenishment.
High quality logs are of great value when analysing SOx excursions and determining remedial action.
PRINCIPLES
The following principles are summarised in the attached flow charts and are discussed here in more detail. These principles are not meant to be a universal solution for every situation. They are meant to provide a general guidance for day today operations.
All coal delivered to the station should be blended for a calculated emission value of 535ppm (or less) SOx. This coal should be directed to the DSB where possible for consumption as required and for stacking out in the ‘Reclaim’ bays. Coal with a calculated emission value of 535ppm (or less) that is not able to be deposited in the DSB should be directed to the Eastern and Western Compacted Stockpiles.
Coal with a calculated emission value greater than 535ppmSOx that is not able to be utilised in blending, should not be received until sufficient blending coal is available.
When coal supplies are of a quality such that the volume of blended coal to the DSB is less than unit consumption, supplies to Unit Bunkers are to be augmented with previously blended coal from the Stacker/Reclaimer or from the Eastern and WesternCompacted Stockpiles.
Tailings deliveries via truck should be brought in over 8 Conveyor and whenever possible directed to the units. Due to the potential difficulties in handling this material when it gets wet, all efforts should be made to avoid sending tailings to the stockpile and the purge area. Although some tailings can be high in sulphur they are only delivered at very low tonnage rates and therefore should have very little effect on sulphur blends.
Signed: K Wykes
K WYKES
PRODUCTION MANAGER
28 May 2010
Attach: Fuel Blending Diagram
BAYSWATER POWER STATIONPage 1