[MSL 2487]

Case Study:

Fluid Bed Sand – Edenderry Power Plant, Ireland

IN BRIEF

Edenderry Power Plant is a peat fired condensing power plant, producing 120MW of electricity to the Irish nation.  Edenderry Power utilizes bubbling fluidised bed boiler technology enabling a highly efficient rate of energy conversion.

Edenderry Power has one Maxflo 228/8-5 conveying system to transfer sand from a storage silo into the fluidized bed. Some of the sand is re-circulated and the Maxflo conveying system is used to top up the bed by injecting sand during an outage period. Approximately 100-150 tons are transferred into the fluidized bed.

MATERIAL CHARACTERISTICS

Material             Fluid Bed Sand

Bulk Density      Aerated 1550 kg/m3

Size                  300-1000 Micron

Temperature      Up to 50°C (356°F)

Moisture            0%

Condition           Highly Abrasive, Free Flowing

SYSTEM OBJECTIVES

1. Long life and low maintenance equipment

2. Reliable low velocity conveying

3. Maintain low pipe and bend wear

4. Clean and efficient way of transporting sand

SYSTEM PERFORMANCE

Transfer Capacity: 15 Mt/h

Conveying Distance: 35m (115 ft.)

Reception Points: One

Average Air Consumption: Total 8.5 Nm3/min (300scfm)

1. Energy efficient conveying was achieved

2. Very low pipe and bend wear for handling an abrasive material

3. Low maintenance resulting in long life of equipment

4. Reliable and stable low velocity transfer of sand into critical part of power station operation

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