We produce FLAT WOOD filters, which we have developed for the most difficult sawdust extraction operations in woodworking, extraction of mineral wool and paper dust. These are the filters with the largest gaps between the filter media on the market. The gaps between the filter media are designed between 50 and 80 mm for conventional filters. For Flat WOOD filter units, the gap between the filter elements is 145 mm. Thanks to the unique design of the filter, we achieve a lift speed between the filter elements of less than 1.3 m / s for woodworking and 0.6 m / s for mineral wool in the entire cross-section of the filter unit. The flow rate between the hoses in conjunction with the integrated inlet chamber and the large gaps between the filter elements make the Flat WOOD filter unit practically non-clogging with material.

For the regeneration of the filter medium, we have developed both an automatic regeneration system using compressed air, where the regeneration takes place by pulses of compressed air depending on the operating pressure loss of the filter medium. We used the CFD simulations to optimize the regeneration system so that the efficiency of the regeneration pulses reaches the physically highest possible efficiency.

For clients who do not have a source of compressed air, we have developed a system for regenerating the filter medium using a regeneration trolley. The regeneration truck is a unique design with the priority of maximum possible efficiency at low operating costs. Flush regeneration using a regeneration trolley ensures the gradual regeneration of individual rows of filter elements, but also individual filter elements. Regenerative flushing of the filter elements always takes place with two filter pockets next to each other, which guarantees a high intensity of regeneration and at the same time low electricity consumption.

Discharge of separated waste is solved by means of a chain conveyor and a rotary feeder. The chain conveyor eliminates the possibility of clogging of the material in the hopper of the filter unit, the friction surfaces of the chain conveyor are lined with abrasion-resistant belts made of Murfeld material. To remove waste from the hopper of wood waste and fibrous materials, we have completely eliminated screw conveyors, which are extremely unreliable for continuous operations.

The construction of the body of the filter unit is designed for negative pressure - 10 kPa and overpressure + 30 kPa. We thoroughly analyzed the pressure resistance of the filter housing by the finite element calculation method. To ensure complete safety in the event of an explosion in the filter unit. We design the size of the relief surface of explosion membranes using WinVent software, the license of which we own.

We optimized the flow inside the filter housing using CFD flow simulations in conjunction with the partner company Fluidea, s.r.o.. Thanks to the CFD simulation, we revealed places in the filter unit that were loaded with an excessively high dust velocity between the filter media. Thanks to CFD optimization, we designed structural partitions and labyrinths in the inlet chamber so that the lift velocity is almost constant in the cross section of the filter chamber.

The basic output range of filtration units is from 10,000 m3 / h to 100,000 m3 / h. The size of the filter units can be expanded, but up to the specified size, the units are transported in two parts so that the size of the largest part can be transported on a truck semitrailer.

The installation of the Flat WOOD filter unit takes place by erecting a steel structure, installing the 1st block (hoppers with a chain conveyor and part of the filter box), installing the second block (filter boxes with a regeneration system). The blocks are installed by lifting with a crane. Finally, the installation of the filter medium takes place in such a way that the filter medium is not damaged during the installation of the individual blocks and during transport.

When designing the FlatWood filter unit, we paid attention to optimizing production costs, transport costs, and the cost of installing the filter equipment. We pay attention to the optimization of the flow inside the filter housing and to the efficiency of the regeneration system. The priority for us is the safety of the filter unit in the event of an explosion of explosive dust. Last but not least, we use the most advanced filter materials manufactured by WBF Envirotec, with a microporous material treatment in an antistatic design, which brings a high level of purity of filtered air at the level of 0.1 to 0.25 mg / m3 TZL (PM10 + PM2.5). The filtered air can be fully returned to the production hall.

Thanks to its unique design, the filter units of the Flat WOOD series are among the TOP solutions for solutions for the extraction of sawdust and fibrous materials on the European market. With the Flat WOOD filter, we have high ambitions to become a leading supplier in the most difficult operations of the wood processing industry and the production of mineral wool. Flat WOOD filters have an unbeatable price / performance ratio.