Solution for pulp and paper production
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SOLUTIONS FOR THE PULP & PAPER INDUSTRY Mass Flow, Density, Level & Moisture Measurement

PULP AND PAPER INDUSTRY THE APPLICATIONS Berthold Technologies’ measurement systems are used worldwide in pulp and paper mills monitoring critical processes online and improving production efficiency. As the technology leader in radiometric and microwave technology we bring extensive benefits to the pulp and paper industry by providing highly accurate and highly repeatable online measurements – leading to major cost savings, stable plant operation and reliable process control. Berthold Technologies is renowned for the ability to provide a wide range of standard products, as well as...

MEASURING THE LEVEL IN THE PULP DIGESTER The wood chips and chemicals are cooked in the digester in order to extract cellulose. High temperatures and caustic conditions dominate in the digester. To control the filling level in the digester a radiometric level measurement is used. The contactless measurement installed on the outside of the digester is not affected or influenced by the severe conditions prevailing inside. This allows reliable control of the digester filling and optimized loading of the digester. A high level switch providing additional process safety. Application Profile ■...

MEASURING THE PULP STOCK LEVEL IN THE MC PUMP STANDPIPE Maintaining the level of pulp stock in the MC pump standpipe is very critical. If the pulp level in the standpipe falls below a certain value it can cause cavitation in the pump. Standpipe overflow and no-flows should be avoided. Traditional instrumentation, using DP cells, and capacitance probes have proven to be ineffective for this application, leading to false readings and causing high maintenance costs. Consequently a radiometric level measurement is used to control the pulp level in the standpipe – contactless and non-intrusive....

BLOCKAGE DETECTION IN THE PULPER MEASURING THE MASS FLOW OF RECYCLED PAPER Undesirable blockages in the pulper are one of the primary reasons for process failures and need to be avoided. In order to detect a possible blockage, a non-contact continuous density measurement is used, which signals an alarm to the operators in case of developing built-ups. Automatic process flow may be abrupt or ceased if blockage forms The processing of recycled paper involves cooking the paper to recover lignin. In order to control the amount of paper that enters the cooking process, a radiometric belt weigher...

MEASURING THE MASS FLOW OF WOOD CHIPS OR BARK In order to optimise boiler operation, the amount of fibres that are fed into the tank needs to be controlled. By using a radiometric belt weigher, the mass flow of wood chips or bark can be measured by means of contactless technology. The main advantage compared to conventional weighing systems is that the radiometric belt weigher does not need to be recalibrated and provides reliable results during many years of operation. The system can be installed on on all conveyor types, e.g. belt conveyors, drag chain conveyors and screw conveyors....

MEASURING THE DENSITY OF LIQUOR In any pulp mill, recovering and regenerating the pulping chemicals and burning off organic material dissolved from wood is a critical step in the process. An accurate, repeatable online density measurement is necessary to operate this phase of the process. Black liquor and green liquor densities are measured reliably by radiometric systems, which are clamped on to the pipe and provide highly repeatable readings. The measurement is carried out without contact and is therefore unaffected by the high temperature and the chemical properties of the liquor....

MEASURING THE DENSITY OF LIME MUD MEASURING THE ASH CONTENT IN THE PULP In the regeneration of pulping chemicals, lime mud is formed as a by-product. Several process steps follow to convert the suspension back into calcium oxide (“lime”). During these processes it is important to have real-time information on the solids content and the density of the lime mud. A radiometric system is ideal for this type of application, because it doesn’t contact the suspension and is highly wear-resistant. As a simple clamp-on solution it is easy to install without any process downtime. The high accuracy...

MEASURING THE MOISTURE OF WOOD CHIPS The determination of moisture in dry fibrous material is important to keep the boiler efficiency constant. Especially in summer, when the wood chip stockpiles are moistened, the water concentration can vary drastically. The Micro-Polar system using microwave transmission technology measures the moisture content online. With an antenna below and above the belt, the microwave measures the whole material cross-section leading to highly representative, real-time information. An additional radiometric system can be used to compensate for variations in bulk...

COMMITTED TO TECHNOLOGICAL LEADERSHIP Outstanding long-term stability The long-term stability of a detector is extremely important for a consistently high quality measurement performance and accuracy during the entire operation. Long-term drifts of detectors sensitivity can be caused by temperature changes and aging. If they go unnoticed and uncompensated, they can cause considerable loss in production yields and product quality. The accurate and reliable operation of our measurements is guaranteed for the whole time of operation. Our integral automatic sensitivity monitoring and adjustment...

Berthold Technologies stands for excellent know-how, high quality and reliability. The customer is always the focus of our solution. We know our business! Using our varied product portfolio, our enormous specialized knowledge and extensive experience, we develop suitable solutions together with our customers for new, individual measurement tasks in a wide variety of industries and applications. Berthold Technologies is specialised in radiometric process measurements for 70 years. This is our core competence with state-of-the-art and cutting edge products and solutions covering a vast range...