COMPANIES New Concept
COMPANIES New Concept for Extraction Systems from SPÄNEX Some extraction systems for air volume flows above 10,000 m 3 /h have the problem that due to local conditions the filter systems cannot be installed outside buildings as required by given norms. The practice-proven alternative of arranging the filter system indoors and equipping it with flameless pressure relief devices is partly not feasible for construction reasons, so that an alternative solution must be found. Against this background, SPÄNEX has developed an alternative concept based on using dedusters connected in parallel. Depending on the required extraction volume flow, two, three or four dedusters each with an air capacity of 10,000 m 3 /h form an extraction centre, which provides an air volume capacity of 20,000, 30,000 or 40,000 m 3 /h. This means that stationary filter systems in the specified performance range are replaced by dedusting units. The dedusters, manufactured according to the European standard EN 16770, have been tested by the DGUV Testing and Certification Body for Wood and have received both the GS mark and the H3 test certificate. This means that all requirements are met in terms of occupational health and safety technique. The following should be noted with regard to the main features of this technology: Deduster The SPÄNEX compact dedusters are complete separation stations consisting of the inlet / filter chamber, the fan cell and the container part. The fan is arranged on the clean air side and equipped with a high-performance running wheel so that high efficiencies can be achieved. Energy-saving motors of efficiency class IE 3 (optional IE 4) are used as standard, whose speed is controlled via frequency converters to adapt the extraction performance to the actual demand. Other features of the compact dedusters are: High suction capacity To overcome the pressure losses in the woodworking machines and the piping system, high suction pressure levels are available at the suction nozzles of the compact dedusters. Quiet operation The sound insulation is very effective, so that the noise levels reach best values. Additional external silencers are usually not required. Effective filtration and cleaning technology The high degree of separation of the tested filter material ensures a residual dust content in the return air of < 0.1 mg/m 3 . The compressed air cleaning (Jet-Pulse-System) ensures an effective and at the same time gentle cleaning of the filter Extraction centre for a maximum volume flow of 20.000 m 3 /h. elements with low compressed air consumption, so that long service lives are achieved. Modern design, compactness The design and construction in conjunction with the use of special filter elements have resulted in compact housing dimensions, so that extremely small footprints are required with low overall heights. Piping system The piping system on the dirty air side is planned and designed in such a way that the required extraction volume flows are available on all machines that are extracted individually or together, whereby shut-off valves are installed in the connecting pipes. The automatic opening and closing of the valves is initiated by the control system. At the same time it is ensured that the conveying speeds for chips and dust in the main duct are maintained and that no material deposits occur. Alternative disposal options The extracted chips and dusts are buffered in containers of the dust collectors and handed over via discharging units to rotary valves (decoupling element). The rotary valves in turn feed a screw conveyor or a pneumatic transport system, which transports the material either into a container, a silo or a larger vessel, under which usually a briquetting press is arranged. The briquettes are mostly used as fuel to heat the workshop. The capacity of the briquetting press is adapted to the quantity of material, whereby SPÄNEX manufactures machines with a chip throughput of 0.5 to 2 m 3 /h. Intelligent control technology The function package of the electric circuit automatically ensures controlled and safe operation of the extraction system. As an option, the control unit can also be equipped with a remote maintenance module so that the functionality of the system can be checked by our service department on customer’s request. A further advantage of this system technology is its energy efficiency. Due to the speed control only the extraction power that is currently required is generated by the fan. The speed of the two, three or four extraction fans is adapted to the respective demand situation via the built-in controller and the required value pair of volume-flow and suction pressure is achieved. Since the machine utilization is different and different running times of the individual machines can occur even at full utilization, this functionality is particularly important regarding the minimization of electricity costs. In pneumatic transport systems the buffering option of the separated material also contributes to electricity cost savings. www.spaenex.de 12 No. 4 • November 2019
COMPANIES Enhanced Possibilities in Timber Construction With a new ETA approval for the HECO-WB threaded rods and an approval supplement for the HECO-TOPIX wood screw, HECO is expanding the application possibilities of two important products for joints in structural timber construction. The HECO-TOPIX screws are now approved for use in laminated beech veneer lumber and hardwoods. Image: HECO lumber of beech, the screws may be used without pre-drilling in accordance with the approval. Laminated and other beech veneer lumbers have their own thread extraction parameters, which are 2.5 times higher than in softwood. The head passage parameter is twice as high as other materials. Bolting can thus be planned more precisely and economically. Good to know: the approval extension has already been incorporated in the current version of the HECO-HCS design software. In the wood connection module, the different building materials can be selected. In addition, all approvals and declarations of performance for HECO fasteners are available on the HECO website at www.heco-schrauben.de The HECO-WB threaded rods with timber thread now have European approval (ETA-19/0129) for joints in load-bearing timber structures. In the future, this will replace the previous general building inspectorate approval and facilitates Europe-wide use in safety-relevant constructions; because with ETA approval, CE marking is now possible too. Threaded rods approved for tensile and compressive reinforcement Through the ETA approval, the use of HECO- WB threaded rods has been extended to other applications. In addition to strengthening transverse shear, tensile and compressive reinforcement are now also profitable and possible without the time-consuming application of adhesive. An additional advantage is that the characteristic tensile strengths could be increased by about 10 per cent. This reduces the use of materials and offers greater freedom in processing. Possible applications include the reinforcement of gable roof girders, in curved girders as well as for penetrations, notches, and transverse connections in structural timber construction. The galvanised, blue passivated threaded rods are available in two diameters ‐ 16 and 20 millimetres ‐ and with a uniform length of 3,000 millimetres. Before processing, they can be shortened in accordance with the approval. Connections The HECO-WB threaded rods now have European approval for joints in load-bearing timber structures. with shorter threaded rod sections are now possible ‐ depending on the diameter, either 128 or 160 millimetres. HECO-TOPIX - ETA approval expanded Fast and safe assembly in timber construction without pre-drilling or counterboring, plus a reduced splitting effect ‐ there are many reasons for C using the proven HECO-TOPIX wood screws. And M now there is one more: the European approval of the products has been extended to use in lami- Y nated beech veneer lumber and hardwoods. The CM screws can thus be used more flexibly in a vari- MY ety of applications in professional wood construction, such as staircase and interior design, in struc- CY tural and general timber construction, in particular in the attachment of rafter-mounted insulations CMY K or facades. Thanks to the excellent performance parameters of the screws, it was possible to extend the requirements for fastenings owing to the approval supplement. It is thus possible to process the TOPIX screws in all veneer lumbers, including in softwood, at an angle of 0 to 90 degrees (previously 60 to 90 degrees). In the hardwoods ash, beech, and oak as well as in laminated veneer WIN_2019.pdf 24 15.02.2019 13:55:48 Less energy, more power! Energy-efficient filtration plants for the woodworking industry. MultiStar filtration plant Made by Höcker Polytechnik ▪ filtration ▪ dedusting ▪ briquetting ▪ recycling ▪ varnishing Höcker Polytechnik GmbH Borgloher Str. 1 ▪ 49176 Hilter a.T.W. Germany ▪ Mail info@hpt.net Fon +49 5409 405 0 www.hoecker-polytechnik.com No. 4 • November 2019 13
