Endress+Hauser Proline Promag 55 - Configuration; Measuring solids content flow

Commissioning Proline Promag 55 PROFIBUS DP/PA
82 Endress+Hauser
6.4 Configuration
6.4.1 Measuring solids content flow
In certain industrial sectors, raw materials which are very inhomogeneous or which contain
considerable amounts of solids, are transported and processed on a daily basis. Ore slurry, mortar or
thick pastes are only some examples of this. However, for flow measurement in the mining industry
or, for example, in applications using pump dredgers, it is often not just the volume flow in a pipe
which is of interest but also the proportion of solid matter being carried along.
To record this solids flow, an electromagnetic flow measurement is usually combined with a
radiometric density measurement (total fluid density). If the total fluid density, solid density (target
fluid) and the density of the transport liquid (carrier fluid) are known, e.g. as a result of laboratory
tests, both the volume flow and mass flow can be calculated in addition to the proportion of
individual components in mass, volume or percentage units ( å 58).
Solids flow measurements using Promag 55
Promag 55S uses special functions to calculate solids flow. The following preconditions must be
met:
• Software option "Solids content flow" (F-CHIP)
• DISPLAY_VALUE - Option 2  ä 102
• A density meter, e.g. "Gammapilot M" from Endress+Hauser, for recording total fluid density
(i.e. including solids)
• Knowledge of solid density e.g. resulting from laboratory tests
• Knowledge of transport fluid’s density, e.g. as a result of laboratory tests or based on tables
(e.g. for water at 22 °C)
The following process variables can be calculated using Promag 55 and made available as an output
signal:
• Volume flow total fluid (transport liquid + solids)
• Volume flow carrier fluid (transport liquid: e.g. water)
• Volume flow target fluid (solids transported: e.g. stone, sand, lime powder, etc.)
• Mass flow total fluid
• Mass flow carrier fluid
• Mass flow target fluid
• Percentage (%) of carrier fluid (volume or mass)
• Percentage (%) of target fluid (volume or mass)
A0006118
Fig. 58: Solids content flow measurement (m) with the aid of a density and flow measuring device. If the solid density
(
S
) and the density of the carrier liquid (
C
) are also known, they can be used to calculate the solids flow.
1 Flow measuring device (Promag 55S) volume flow (V). The solid density (
S
) and the density of the transport
liquid (
C
) must be entered in the transmitter.
2 Density measuring device (e.g. "Gammapilot M") total fluid density (
M
) (transport liquid and solids)
r
C
r
S
1
2
r
M
m
V