Chemicals and auxiliary materials

Starch liquefaction

Starch is an important additive for increasing the strength of the paper. It is usually applied as surface starch via a glue or film press but is also mixed into the pulp mass on the wet end of the paper machine. The starch processing system includes the starch silos, the liquefaction process, the starch cooker as well as the stations on the machine where the starch is applied. The raw starch is stored in narrow, tall silos. Filling here is carried out pneumatically, generating large amounts of dust. The starch is emptied directly into the slurry production process below the silo. Finished slurry is pumped into the starch cookers by using eccentric pumps which must not run dry.

Level measurement with VEGAPULS 67

Because of strong dust generation in the silo, the bulk solids radar sensor VEGAPULS 67 is quite the perfect solution for this level measurement. With its high signal sensitivity and narrow transmission beam, it can deliver reliable measurement data even during the filling process.

Dry run protection with VEGASWING 61

Dry run can cause damage or even complete breakdown of the eccentric pumps. For that reason, the slurry flow is monitored with a VEGASWING 61 vibrating level switch.