In the field of turbomachinery construction, CFD has, within the space of just a few years, become an indispensable tool for the optimization and new design of turbomachines, as well as for the elimination of fluid-mechanic problems in installed systems. The following paper demonstrates the basic knowledge as well as applied examples of the CFD simulations of process fans.
Industrial fans are only one aspect of the main business of Venti Oelde. The converting market is also an integral part of the diverse activities of the company from Oelde in Germany – reason enough for a visit by the C2 team
Ventilatorenfabrik Oelde GmbH (Venti Oelde) has built a new performance testing facility for centrifugal fans, both heavy-duty and special construction, in a record time of only three months.
Ventilatorenfabrik Oelde GmbH (Venti Oelde) extends the lifetime of the refractory brick lining in kilns in the cement industry – by targeted cooling of the surface of rotary kilns.
Upgrading high energy demand machines is well worth doing: Venti Oelde has succeeded in reducing the energy costs of a centrifugal fan, in operation for many years, by almost a quarter. The investment easily paid for itself after 7200 hours of operation, that is, within 14 months.
Venti Oelde successful as technology partner and general contractor in Belarus
Extension of useful life through repair and optimization of fan impellers
How do the manufacturers of equipment for the cement industry see the subject of service, repair and maintenance? ZKG spoke to Peter Herrmann, head of the Industrial Fans Division at Ventilatorenfabrik Oelde, his colleague, Frank Kolbe, Sales Manager for After Sales Service, and Klaus Wilkes, Head of Customer Service.
Air-handling specialist Venti Oelde can equip plant areas of large cement processing lines with only a single, powerful centrifugal fan. When compared with using two combined centrifugal fans, the customer saves on investment, energy and space.
Venti Oelde predicts longer useful lives and reduced time and effort for maintenance with their wear protection for process fans. Now the company is promising optimized systems.
Cement production using lime marl has been going on for over 100 years in the Ennigerloh HeidelbergCement AG works. Ongoing modernisation ensures a lasting, competitive building material production. Associated with this is the regular inspection of plant components. It was such a plant inspection which revealed that, as a result of wear on the impellers and considerable damage to the casings and casing feet of the existing electrostatic precipitator fans, built in 1973, type HK 200/240, repair work had become essential (Fig.1).
Sifting is used to separate different materials by means of air-flow. Air separation was first used to separate single-component materials into different particle sizes: for example, air separators are used in the cement industry's milling/classification operations owing to the fineness of the material. A distinction must also be drawn between a dynamic and a static separator: with the former, the force competing with the air-flow is generated by a centrifugal field whereas the latter uses gravity. This article concerns itself solely with sorting into light and heavy fractions using static separators.
Venti Oelde has developed a plant to treat production rejects from the manufacture of incontinence and other hygiene products. This plant can treat SAP and fibrous material with a mass throughput of 200 kg/h so that both products can be returned directly to the production process. The heart of this plant is a special air dispersal unit and the sorting equipment "Vibrosap".
Recycling wood waste as fuel makes good sense for both ecological and economical reasons. Since, in the foreseeable future dumping in landfill sites will no longer be permitted (Technical Directive for Municipal Solid Waste, Provisions for Waste Storage) and material recycling is also only possible within certain limits, there will be considerable amounts of wood waste which need dealing with.
Pneumatic conveying plant with exhaust, dust extraction and ventilating plants
Higher efficiency rates as a result of two-stage radial fans with a power output of up to 400 kW.
Ventilatorenfabrik Oelde GmbH has succeeded in ensuring the highest possible availability of centrifugal fans in operation in large plants, simultaneously keeping investment costs low and providing full capacity utilization.
The market is showing an increasing demand for highly efficient industrial centrifugal fans with impellers optimised for efficiency. Increased efficiency reduces energy consumption and thus operating costs, and also reduces environmental pollution. Furthermore, many countries impose mandatory energy efficiency guidelines. As a result of intensive research, Venti Oelde has recently been able to present a state-of-the-art generation of impellers known as the M-Series.
The production of fertilizers is not only complex, but also energy-intensive. It is a matter of interest, therefore, that energy savings of sometimes more than 25 % can be achieved with high-efficiency centrifugal fans and their auxiliary equipment which are required for the manufacture of fertilizers, that is, when using components of which many people believed that their technological possibilities had long been exhausted.
Ventilatorenfabrik Oelde GmbH, the reputed manufacturer of industrial filters and specialist for air handling systems, provides efficient and environmentally compatible filter solutions for the flame-cutting process during metal recycling.
The versatile industrial filters from Ventilatorenfabrik Oelde GmbH (Venti Oelde) prove themselves in daily use in many branches of industry. Over the last 25 years they have also been successfully used to exhaust gas-cutting smoke in the recycling industry.
The following example at Rohstoff Recycling Dortmund GmbH (RRD) shows how Venti Oelde provides support to recycling companies so they comply with environmental laws without constricting operation during scrap baking.
Car shredder plants crush up to 300 tonnes of scrap an hour – vehicles as well as mixed scrap and white goods. Depending on the material, volatile hydrocarbons (Volatile Organic Compounds VOCs) are released in the exhaust air. VOCR, a new system for car shredders developed by Venti Oelde, reduces environmentally damaging hydrocarbon compounds contained in the exhaust air.
Using a new nozzle geometry Venti Oelde has improved the efficiency of drying systems for printing presses and coating plants. The patented process offers enhanced performance, better safety, higher quality – and also lower energy consumption.
Ventilatorenfabrik Oelde provides process fans with special wear protection before they leave the factory. The company will also repair parts which are liable to wear on fans of any make which are already in service.
