Practical test passed
Peters Stahlbau uses AIRTECH for better air in the hall
(firmenpresse) - Several welders are working on a long steel beam in the production hangar at Peters Stahlbau. Sparks are flying, smoke is rising. A few metres away general manager Heinz-Geert Peters is observing the events and is taking a deep breath. He can do this without worries. The reason for this is called "AIRTECH" and is installed at several points of the hall in which structural components for the construction of steel halls, industrial buildings, power plants and stadiums are produced.
Since 2008 the company has used six ambient air units by TEKA to purify the air in its three-span hall. At that time it was the first installation of that range which showed these dimensions. Today such a project is part of the daily routine of the international manufacturer of extraction units from Velen in Westphalia. Even after six years Heinz-Geert Peters is still as satisfied as at the beginning: "The units have proven their value. They protect all the employees in the hall, make production processes more efficient and reduce heating costs."
And how did the cooperation come about? "When building our third span, the professional association for wood and metal contacted us and asked: ''How do you handle the welding fume?", explains Heinz-Geert Peters. The company sets high quality standards - on occupational safety, too. That is why Peters has intensively examined the topic and has observed that the use of mobile devices with suction arms was not feasible in his company when processing big components. A system with pipelines was not an option because of the multitude of suspension and console cranes. The situation was different with the AIRTECH.
The ambient air unit is a so-called stand-alone system which does not require pipelines and which can be used in production facilities with a high concentration of smoke and emission rates as they occur during MAG welding in steel construction. In the hall at Stahlbau Peters three extraction and filter units have been installed at each of the two facing side walls of the middle spans. The units take up the smoke-containing air produced during welding via intake ports and filter it. The polluted air runs through an intensive purification process. The units are each equipped with 12 filter cartridges with a filter surface of 36 m² (total filter surface of 2600 m²) which can be dedusted automatically at a low power and pressure consumption.
Then they lead the purified, warm process air via ejection nozzles back into the hall. The state-of-the-art of the filter technology makes it possible: The system is equipped with cartridges of the category M which, according to DIN EN 60335-2-69, separate particles to a degree ex-ceeding 99.9 per cent. Then the pollutants are again led towards the intake ports through air circulation. With a total volumetric flow rate of 180,000 m³/h the system makes for five complete air exchanges per hour. Thus the air quality is substantially improved and at the same time the existing warmth is optimally used.
The positive result was visible and noticeable immediately after the commissioning. "The shroud of mist that had been drifting through the hall bays was gone. The mucous membranes were free", said Peters. The initial scepticism of the employees made way for general approval: "When we lowered the rotational speed of the fans for testing purposes, the employees immediately started protesting. When we sped up again, we had right away a better indoor climate in the hall. In January our suppliers were surprised about the extremely clean hall. The cleaning staff reported that there was less dust on the desks of the neighbouring office building." And the noise volume? "We almost don''t notice the extraction units, only if a light blinks once in a while." The measurements of the professional association also confirmed the effectiveness of the system: "In the beginning they were sceptical and predicted: This will never work out. You won''t be able to meet the exposure limit with it." The opposite turned out to be the case: "As the protocols prove we were below the statutory limit values for alveolar and inhalable dust at all the measurement points. Except for that at one workplace which does not exist anymore today."
The topics safety and technical know-how played a major role: „We have undertaken a risk assessment for every workplace and we have developed solutions for example for the fire protection together with TEKA." Electric releases ensure that, if needed, 15 m3 of CO2 flow into the filtration chamber. We receive the information about the operation and the state of the units on one screen. The operation is carried out via remote control. The user can select each individual unit and increase or decrease the volumetric flow rate depending on work intensity. This saves energy.
The system has a lot to offer, especially when it comes to energy effi-ciency. That is the experience Heinz-Geert Peters made: "It makes of course sense to purify the existing warm process air and to reuse it in-stead of blowing it outside and implementing an energy intensive fresh air supply. In our case we are talking about 180,000 m³ air/hour that do not need to be led in from the outside and be heated up." Furthermore, other savings can be made: "We heat with ceiling spots. We need them very seldom since we use the extraction and filter units." The reason: thanks to the outlet nozzles at a height of about 4 metres the process heat is spread quickly and evenly. Measurements have proven that the circulation of the warm air actually works. We only have a minimal temperature difference between the head area of the employees and a height of eight meters. Thus we have a consistent temperature in all layers of the hall."
Heinz-Geert Peters delivers a positive summary: "If you want dirt and fume exposure in your hall to be obsolete, then I can recommend you this system. The desired success has been achieved. When I see other systems in other companies I feel confirmed. This was a good invest-ment!"
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Unternehmensinformation / Kurzprofil:
The TEKA Absaug- und Entsorgungstechnologie GmbH was founded in 1995 by the general managers Jürgen Kemper and Erwin Telöken. The company based in Velen (Westphalia) ranks among the leading manufacturers of extraction and filter units for the industry, craft enterprises and laboratories in Europe and has about 120 employees. The product portfolio not only contains suction systems and filtering devices, but also oxygen cutting benches, vision protection and sound-proofing elements.
Datum: 23.03.2015 - 09:24 Uhr
Sprache: Deutsch
News-ID 1345968
Anzahl Zeichen: 0
contact information:
Contact person: Erwin Telöken
Town:
Velen
Phone: +49 (0) 2863/92820
Kategorie:
Energy & Utilities
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"Practical test passed
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