Blast Rooms
Where open air blasting was once the norm, environmental protection legislation has now largely made this a thing of the past. To help abrasive blasters comply with these legislative requirements, Blastech can supply custom blast room solutions to meet specific budget and operating requirements.
Blast chamber - Blast chambers are fabricated from 5mm plate for structural rigidity and abrasion resistance. Blastech Blast chambers also include a generous provision of external mounted lights to provide high levels of even lighting. Floor grating and support structure can be engineered to withstand high loadings – 50 tonne rating being typical.
Abrasive recovery – Recovery systems range from 100% automatic recovery to a shovel-in hopper system mounted approximately 300mm off the floor. Material transfer of spent abrasive uses low velocity methods to reduce wear and power requirements.
Abrasive cleaning – Abrasive cleaning in a Blastech blast room is a two stage process.
Firstly, a live sieve pulls out large trash followed by processing through an air-wash to remove fine trash and abrasive fines. An air-wash uses gentle suction to separate trash, abrasive fines and reusable abrasive.
Dust collection – To maintain good visibility for better safety and productivity, Blastech blast rooms use a reverse-pulse dust collector. These operate on the principle of a fan pulling dust laden exhaust air from the room through a pleated paper cartridge to remove the dust from the air. A compressed air pulse nozzle aimed down the inside of the cartridge is regularly pulsed using a timer to remove any build up of fines on the dirty air tide. Clean air is then exhausted out the dust collector stack.
Garnet Recycling Systems
Not every blast job where the garnet can be recycled is suitable for a blast chamber. A dry-dock, a temporary blast enclosure, a storage tank are all jobs where abrasive could be recovered but where installing a blast room is not viable. If you can recover garnet you can recycle it.
By taking the abrasive cleaning componentry from a blast room and repackaging it for on-site use, Blastech has developed a range of garnet recycling systems. With systems ranging from 2 to 7 tonnes per hour cleaning capacity and garnet’s excellent recycling ability, Blastech can help you to cut abrasive costs dramatically.
Vacuum Recovery
To complement the garnet recycling systems offered by Blastech, a range of vacuum recovery systems is also available. These systems make abrasive recovery more efficient where spent abrasive has accumulated in a confined area such as a ship hull or inside an abrasive blasting containment enclosure.
Blastech Vacuload systems consist of 3 major components – pick-up, interceptor and vacuum generator.
Pick-up tool – collection of spent abrasive can be by either a bulk loading hopper (shovel in), bulk pick up tool (where spent material has piled up) or flared pick-up tool (where abrasive is spread out).
Interceptor – The interceptor slows the air/abrasive mixture down so that abrasive and heavy dust particles drop out of the airstream. Drop out collector options can include a 200L drum directly into the blast pot, or an overhead storage for transfer into bulk bags. Fine dust remains in the airstream at this point.
Vacuum generator – The final component in the recovery system is the vacuum generator. This can be powered by either a venturi educator pump or a displacement blower. This unit is the source of vacuum for the entire system from pick-up tool to cleaned exhaust air, which in its final stage uses a reverse pulse dust collector to remove fine dust before exhausting clean air.
Blastech Vacuload systems are available with a range of different options for all three components to meet any budget or operating requirements.