Monitoring and control of levels are part of all production industries, whether the product being monitored is a liquid or a solid. The pulp industry is no exception and is one of the many industries to which Vega supplies precise and innovative measuring sensors.
Wood chips are the raw material for producing cellulose and pulp. Made from debarked logs, they are shredded on chippers or bought in as sawmill waste. The chips are fed via conveyor belts into silos up to 25 m high. After that they are sorted by size and quality and transported to the pulp digester or the TMP (thermo mechanical pulp) system. The wood chip silos are filled and emptied in batch quantities, which creates material cones, large amounts of dust and bridges that can collapse during emptying.
Vega’s optimal solution for this type of level measurement is the radar sensor VegaPuls 68, designed for continuous measurement of bulk solids under difficult process conditions. Compared with conventional radar sensors, the instrument has a considerably higher signal sensitivity, which ensures that the measurement works reliably even during filling. The sensor is not in contact with the product and its function is independent of the dust and noise which are generated during the filling process. This continuous monitoring also means dependable logistics planning is possible.
Further applications for VegaPuls 68 are in the bark silos as well as the blowing tank following the pulp digester. The sensor is a cost-effective and reliable measuring instrument which is easy to install and wear and maintenance free.
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