Westeria: New generation air separator

At IFAT, Westeria will be presenting the AirStar evolution air separator, which has been developed from scratch, to the public for the first time.
Copyright: Westeria

The completely redesigned air guidance system offers a high degree of flexibility in fulfilling specific tasks, the new control panel facilitates adjustment and process monitoring, and the design is optimized for ease of maintenance. Energy consumption is significantly lower than before. Available in working widths from 1,000 mm to 3,000 mm, the AirStar evolution is suitable for throughputs of up to 400 m³/h. T

An essential part of almost all recycling processes, windsifting enables highly efficient separation of the components contained in waste streams based on their weight and ballistic properties. Westeria air classifiers are used worldwide for applications ranging from household waste, plastics, waste wood, refuse derived fuels, mixed construction waste, waste glass and industrial waste to scrap recycling.

The air management system of the air classifier plays a decisive role in the efficiency and precision of the process and therefore the sorting quality. Accordingly, Westeria has invested extensively in the development of this core component of the AirStar evolution. The result of numerous simulations, flow analyses and tests with different materials is the new NotusAir air management system. Its newly designed, controllable fan enables precise control of the airflow and can therefore reduce energy consumption by over 30% compared to a conventional air throttle valve, which is also noisier. To optimize results, the separator drum can be adjusted horizontally, the feed belt vertically and the nozzle angle fully electrically. The specially designed air routing and a large-area hood over the light material chamber also optimize the entire separation process. This makes it possible for the first time to return a large proportion of the process air to the separation blower, reducing the amount of air to be extracted by two thirds. This makes the overall system very compact and – in addition to the energy consumption – also significantly reduces the investment volume.

Proven advantages inherited from the previous AirStar technology include the downward angle in the integrated acceleration conveyor, which prevents heavy parts with a larger surface area from being carried into the light material fraction, and the shaftless separating drum as a measure against material jamming or winding between the drum and housing. The patented, automatic misalignment control in the acceleration belt ensures even more reliable belt misalignment correction thanks to an improved sensor and new algorithm.

For the first time, the AirStar evolution enables the electrical adjustment of all separation parameters from a central and easy-to-understand control unit as standard. On delivery, the optimum settings determined for the customer’s material in Westeria’s TechCenter are already preset. Saving individual separation recipes enables the system to be set quickly and precisely for changing materials. The separation process and its adjustment can be observed directly through the large viewing windows on the machine. The new, intuitive user interface is so simple that even untrained personnel can operate the machine. The system can also be connected to the operator’s central system control via the usual interfaces.

A large number of possible extensions make the AirStar evolution a stationary cross-flow air classifier for all applications. Thanks to the established DiscSpreader material distribution system, narrow, irregular material feeds can be distributed across the entire belt width without the need for additional installation space. To create a third fraction, the new air separator can be equipped with the DuoDrum system, which uses two separating rollers arranged one behind the other. Alternatively, the AirLift overband extraction system, which has also been optimized, can be integrated into the lightweight material chamber to remove ultra-light materials.

Stand B6, Halle 329/428


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