Applications; Applications Of Different Sensors - Valmet SMART-PULP Operating And Installation Instructions

SMART-PULP

7 APPLICATIONS

The SMART-PULP transmitter is used for
pulp consistency measurement in the pulp
and paper industry. The transmitter is
installed
directly in the stock line (see Fig. 7).
SMART-PULP is supplied with a sensor,
process coupling, process gasket and
deflector plate to suit the process application
(deflector is not used with UL and JL
sensors).
SMART-PULP's operator unit is mounted
either on the transmitter or optionally in a wall
box (= remote operator unit).
7.1 Applications of different
sensors
SMART-PULP is supplied with different
optional sensor types (Fig. 7.1a).
Figures 7.1b show the flow velocity and
consistency ranges best suited for the
different sensor options and pulp types.
When choosing a sensor for a particular
application we specify a "window" whose
width represents the process's flow velocity
range (e.g. 1.2 to 3 m/s) and whose height
represents the consistency range (e.g. 2.5 to
2.8% Cs).
The specified "window" should fit inside the
white area of each diagram. The transmitter
will operate outside the area, but flow velocity
may then affect the measurement or there
may be some other disturbances.
Figure 7.1a SMART-PULP's sensor options and process couplings.
1) Standard coupling, 2) Plastic-pipe coupling, 3) HL blow line coupling,
4) WS coupling
5) With LL, GL, RL, UL and LS types.
Smart Consistency Transmitter
1)
2)
5)
LL UL JL
40
Controller
Dilution
water
PULP
TANK
Figure 7 SMART-PULP's typical consistency control
application
The PULPSEL PC program supplied by Valmet Automation
can also be used to select the best sensor. PULPSEL also
calculates and prints the required minimum lengths of
straight pipe.
The effect of flow velocity variation on the accuracy of the
measurement result will be negligible on the recommended
measurement ranges when the transmitter is installed
according to the specified instructions.
LS GL RL
BCs160VA
Nov. 15, 1997
P V / S P
L / R
P V / S P
H
+ 2 0 S P
1 0
5
2 S P
L
2 0 %
R A / M
5
10
- 2 0
A
L M
NOVE
O U T
O U T %
sampler
Flushing
water
Compressed
air
SMART-
PULP
Dilution
water
valve
3)
4)
HL WS