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Custom fiber production - New grinding unit for the paper industry uses integrated drive technology from Siemens

, Siemens AG

The Austrian company Andritz AG is currently trialing one of its latest further developments – the Andritz Twin Flow Refiner – in the fiber preparation pilot plant located at its group headquarters in Graz. This new grinding unit is fitted with integrated drive technology from Siemens. The IDS (Integrated Drive Systems) solution helps boost plant efficiency while simultaneously reducing energy consumption.
    
Andritz AG is a globally leading supplier of plants, equipment and services for the paper industry. One of its latest developments in this field is the Andritz Twin Flow Refiner, a grinding unit with controlled drive for the production of different types of paper and cardboard. To trial the Twin Flow Refiner in the fiber preparation pilot plant at its company headquarters, Andritz has opted to use Simotics FD (Flexible Duty) from Siemens – an economical, highly efficient complete system comprising a low-voltage motor and converter with a high power density. As part of the Integrated Drive System from Siemens, Simotics FD is ideally adapted to the frequency converter, couplings and drives, preventing overdimensioning of the converter and ensuring optimum voltage utilization while minimizing noise emissions. Compared to the uncontrolled drive customarily used, this converter control achieves a high level of energy efficiency.

Everything under control
As the grinding process accounts for between 25 and 30 percent of the electrical energy used in the paper making process, the energy efficiency of the Andritz Twin Flow Refiner deserves particular mention. Another benefit of the controlled drive variant is that it allows the grinding process and consequently the quality of the fibers to be individually and precisely adjusted to the customer’s specific requirements. As the single most important step in the paper making process, this has a decisive impact on the quality of the paper. How the pulp used in the end product is treated depends on its intended application.

Modern research and test environment
In its Graz headquarters, the company is not only involved in testing innovations in the field of fiber processing such as the Andritz Twin Flow Refiner. The Group also operates a paper laboratory here for fiber analysis. In this research and development facility, Andritz AG works together with customers to develop customized solutions and prototypes.

Captions
Two Andritz Twin Flow Refiners in a paper mill producing specialty papers.
Integrated Drive System - Pump Application
Simotics FD
 

, Siemens AG

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