Dustx Installs Pulse-Jet Filters At Power Station

An installation completed by the Dust Extraction (Dustx) Group at a UK power station involved the use of its 'X' 'CV' pulse-jet tubular-bagged filter units. The installation required two of the company's Model CV 10 x 19 '3XL' filters, with each unit being fitted with two 22kW integral fan sets. Both filter units form part of a centralised dust control system with a total air extraction rate of 64,600cuM/hr, which serves the biomass loading facility, extracting dusts generated from loading materials, including nut kernels, palm and wood pellets, by a 3cuM Komatsu bucket loader onto conveyors, via hopper loaders.

Careful consideration was given to the type of filter employed as a result of the varying characteristics of the products being handled, all of which classified as explosive and having a degree of moisture content. Purpose-designed tipping hoods eliminate the mass migration of airborne dust created during the tipping operation, enabling the effective dust control of the two hopper loaders at various points along the two product feed conveyors. The process plant controls are flexible, providing integration with the client's main operating control system.

Stack emission levels from the system are below 5mg/m3. The extracted dusts from the plant are discharged from the collectors, via rotary valves and screw conveyors, back onto the client's product feed conveyors. This maximises the product throughput and eliminates waste disposal and manual handling. The clean air discharged from the filter units are policed by two emissions monitors, which continuously check the emissions levels and provide electronic feedback to the customer's operating control system. Access to the filter unit and associated equipment, for maintenance and inspection, is provided by a galvanised staircase with a series of step-off platforms at various levels.

Each filter unit is also served by a dedicated compressor unit to provide the compressed air required for the online cleaning operation. A divert system is in place to allow switchover from one unit to another should an emergency situation occur. Upon the completion of the project and final commissioning, the system was subject to an independent inspection by the client's appointed testing body relating to performance, ATEX and DSEAR standards, after which the plant was accepted and became fully operational.

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