Stock preparation

Pulp storage and discharge towers

Large quantities of prepared stock are required for the continuous operation of paper mills. This material is stored in large storage towers up to 30 m high with capacities up to 2000 m³. The stock coming directly from the pulper also goes into intermediate storage in large pulper discharge towers. Characteristics for these towers are the large throughput and agitators that ensure a homogeneous stock. Vast amounts of steam form due to the heat of the stock, the surface is turbulent due to the action of pumps.

Level measurement with VEGAPULS 62

The level measurement must provide reliable information about the contents of the towers. Notwithstanding the difficult measuring conditions, the radar sensor VEGAPULS 62 with large horn antenna is especially suitable for the measurement in the upper area of the storage tower.

Level measurement with VEGABAR 52 or VEGABAR 54

The hydrostatic level measurement in the lower area measures the pulp suspension, which is thinned down with process water to facilitate out-pumping. This additional measurement prevents the agitators from running dry. A pressure transmitter with CERTEC® ceramic measuring cell in conjunction with a ball valve fitting is implemented here.