VEGA

Waste paper and stock preparation

Waste paper and stock preparation

Dissolution of waste paper and cellulosein the pulper

Waste paper or cellulose bales are transported into the pulper via a conveyor belt and dissolved there through the addition of process water. Through the mechanical action of agitators, the fibres are separated for the further steps of stock preparation. The process conditions in the pulper are characterized by strong pressure shocks from falling bales, vortex formation from fast rotating agitators as well as heavy abrasion from foreign substances such as wires, glass, stones, etc.

Belt monitoring with VEGAMIP 61

The microwave level switch VEGAMIP 61 contactlessly detects the loading height on the conveyor belt. Possible blockages are also detected, thus ensuring the automatic operation of the system.

Level measurement with VEGABAR 52

The hydrostatic level measurement monitors the correct proportion of waste paper or cellulose to process water. A VEGABAR 52 pressure transmitter with a robust CERTEC® measuring cell is implemented here. The gauge is mounted in a socket inclined in the direction of rotation and equipped with a rinsing facility. In pulpers for water-resistant paper with low pH value, VEGABAR 55 with a metallic, highly chemically stable METEC® measuring cell is used.

» VEGAMIP T61

Measuring range
up to 100 m
Process fitting
thread G1½, 1½ NPT
flanges
Clamp
Process temperature
-40 … +80 °C
+450 °C with mounting adapter
Process pressure
-1 … +4 bar
(-100 … +400 kPa)

» VEGAMIP R61

Measuring range
up to 100 m
Process fitting
thread G1½, 1½ NPT
flanges
Clamp
Process temperature
-40 … +80 °C
+450 °C with mounting adapter
Process pressure
-1 … +4 bar (-100 … +400 kPa)

» VEGABAR 52

Measuring cell
CERTEC
Measuring range
-1 … +72 bar
Permanent product temperature
-40 … +150 °C
Deviation in characteristics
0.2 %, 0.1 %, 0.075%
SIL qualification
up to SIL2

» VEGABAR 55

Measuring cell
METEC®
Measuring range
-1 … +25 bar
Permanent product temperature
-12 … +200 °C
Deviation in characteristics
0.075 %
SIL qualification
up to SIL2