Airpol Engineeing - Dust and Fume Control engineers. Manufactures of reverse jet and reverse air flow filters, cyclones, fans and associated equipment. LEV readings undertaken and advice on exsisting equipment

A sawmiller who was moving to new premises required an extraction system that would allow him to machine either hardwoods and softwoods on either of two moulding machines and then collect the resultant shavings and dust in the correct dedicated hardwood and softwood chip trailers.

Oregon-Canadian Europe Ltd. is an independently, privately owned importer, sawmiller and distributor of Clear Softwoods, Scandinavian Redwoods and Whitewoods and high quality Hardwoods.

Their move to a new mill in Manchester gave them the opportunity of installing exactly the system needed to achieve the separation of hardwood and softwood by products.

The system would need to incorporate a method of allowing the by-products to be diverted to the correct trailer dependant upon the type of wood being machined, on either moulder.

Although sounding a fairly simple requirement, in practice it was not so easy. The system needed was one that was simple to operate by the machine operative, and would be foolproof.

Airpol’s innovative approach was to have one of their Type RFPS Filters dedicated to each moulder, and then discharge into one of two conveying mains which would deliver the by-product to the correct softwood or hardwood trailer.

The outlet of each filter was fitted with a compressed air change-over damper which diverted the by-product to the correct conveying duct, for onward delivery into the correct trailer.

The operation of these change over dampers was effected from the control panel, also supplied by Airpol, so that moulder No. 1 could be selected for softwood or hardwood and the same with moulder No. 2.

This selection, from inside the mill, would operate then dampers and allow the by product to be diverted to the correct trailer.

After submitting their quotation, which was very competitive considering the complexity of the system, Oregon-Canadian inspected one of Airpol’s existing installations, and impressed with what they saw, placed the order with us.

Now, all each machine operative has to do is choose the correct trailer by means of a simple change-over switch on the front of the control panel, dependant upon what wood is being machined and he can be confident that the by product from that wood will end up in the right trailer.

The softwood system has the further facility to discharge into one of two trailers via a change-over damper on the conveying fan, due to the softwood shavings being bulkier that the hardwood, and this also allows the trailers to be changed without shutting the system down.

The trailer filling system incorporates a ‘ring main’, which vents the conveying air from the trailers, preventing dust escaping into the surrounding area.

The use of Airpol’s continuously rated ‘RFPS’ Filters means that the system can run 24/7 without down time needed for bag cleaning or regeneration.

A third system on the site which also discharges into the hardwood trailer filling system, serves a Stenner Resaw, Multi Rip saw and Cross Cut saw.

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